Window opening and closing system

Abstract

To provide a window opening / closing system which can alleviate an operation load acting at the time of closing of a window body, and which can easily close the opened window body without requiring a large force.SOLUTION: A rotary mechanism of a window opening / closing system 10 includes: a rotary rod 25 installed at a window frame 12 rotatably; an operator 24 for high window for rotating the rotary rod 25; a roller for unwinding a revolving chain according to the rotation of the rotary rod 25, and for winding the revolving chain; and a first torsion spring which is installed at the rotary rod 25, and in the case of being twisted in the winding direction or in the reverse direction from the winding direction, which exhibits a torque in proportion to an angle twisted in the reverse direction from the twist. In the opening / closing system 10, when the rotary rod 25 rotates in the direction of unwinding the revolving chain, the first torsion spring is twisted in the winding direction or in the reverse direction from the winding direction and the first torsion spring exhibits a winding torque, and a rotation load acting on the rotary rod 25 in the case of revolving a window body 13 from an open state to a closed state is alleviated by the winding torque of the first torsion spring.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a window opening and closing system.

Background Art

[0002] There is disclosed a smoke exhaust window opening and closing device that is installed in an opening and closing smoke exhaust window and closes the window body by winding a wire around a pulley installed on the window body (shoji) with one end fixed and winding the other end of the wire around a handle operation box installed at a predetermined height to apply a force to constantly push open the window body, and opens the window body by releasing the winding of the wire wound around the handle operation box. (See Patent Document 1).

[0003] In this smoke exhaust window opening and closing device, an emergency smoke exhaust window opening device for fixing and releasing one end of the wire is installed separately from the handle operation box without releasing the winding of the wire wound around the handle operation box at the other end. In the smoke exhaust window opening and closing device, a smoke sensor dedicated to the emergency smoke exhaust window opening device is installed, and the fixing of the wire in the emergency smoke exhaust window opening device is released by the detection signal of the smoke sensor, and the window body is automatically opened in an emergency.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The window body (shoji) of the smoke exhaust window opening / closing device disclosed in the above Patent Document 1 has a rotating end rotatably connected to the lower frame of the window frame, a free end spaced apart and facing upward from the rotating end, and first and second side portions spaced apart and facing each other in the lateral direction. When the smoke exhaust window opening / closing device opens the window body, the biasing force of the gas damper causes the free end of the window body to pivot downward in the vertical direction, and the window body is opened. When closing the opened window body, the free end of the window body is pivoted upward in the vertical direction.

[0006] The window body is made of a resin sash, an aluminum sash, or an aluminum-resin composite sash and has a considerable weight. When the window body pivots upward (when closing the window body), the self-weight (weight) of the window body and the biasing force of the gas damper act. Therefore, an operating load acts when closing the window body, not only requiring a considerable force for the closing operation of the window body but also requiring the handle to be rotated multiple times, and it may take time and effort to close the window body in the fully open state to the fully closed state.

[0007] An object of the present invention is to provide a window opening / closing system that can reduce the operating load acting when closing the window body and can easily close the opened window body without requiring a large force. Another object of the present invention is to provide a window opening / closing system that can smoothly pivot the window body at the initial movement of opening the window body and can smoothly close the window body without taking time and effort.

Means for Solving the Problem

[0008] The premise of the present invention for solving the above problems is a window body in which the free end pivots in the vertical direction around a rotating end rotatably installed on the window frame, a pivoting bar connected to the free end of the window body to pivot the window body from the closed state to the open state and from the open state to the closed state, and a rotating mechanism that pays out the pivoting bar in one direction to pivot the window body from the closed state to the open state or winds up the pivoting bar in the other direction to pivot the window body from the open state to the closed state.

[0009] The features of the present invention under the above premise are that the rotating mechanism includes a rotating rod rotatably installed on the window frame and extending horizontally, a rotating force applying means for rotating the rotating rod in the clockwise or counterclockwise direction, a roller installed on the rotating rod to which the pivoting strip is connected, and the roller feeds out and winds up the pivoting strip as the rotating rod rotates, and a first torsion spring installed on the rotating rod that generates a torque proportional to the angle of torsion in the direction opposite to the torsion when twisted in the winding direction or the direction opposite to the winding direction. The window opening and closing system is such that when the rotating rod rotates in the direction of feeding out the pivoting strip, the first torsion spring is twisted in the winding direction or the direction opposite to the winding direction, the first torsion spring generates a winding torque in the direction in which the roller winds up the pivoting strip, the rotation of the roller is biased in the winding direction of the pivoting strip by the winding torque of the first torsion spring, and the rotational load acting on the rotating rod when the window body is pivoted from the open state to the closed state is reduced by the winding torque.

[0010] As an example of the present invention, in the window opening and closing system, the free end of the window body pivots downward in the vertical direction and the window body is opened from the closed state. When the window body is opened, the torque of the first torsion spring is adjusted so that the free end automatically pivots downward in the vertical direction due to the self-weight of the window body.

[0011] As another example of the present invention, in the window opening and closing system, when the pivoting strip is wound in the other direction and the window body is pivoted from the open state to the fully closed state, the torsion of the first torsion spring returns and the winding torque of the first torsion spring disappears.

[0012] As another example of the present invention, in a window opening / closing system, when the turning bar is wound in the other direction to turn the window body from the open state to the fully closed state, the torsion of the first torsion spring returns, and after the winding torque of the first torsion spring disappears, the first torsion spring is twisted in the winding direction or the direction opposite to the winding direction. In the closed state where the window body is turned to the fully closed position, the first torsion spring generates a payout torque in the direction in which the roller pays out the turning bar. The rotation of the roller is biased in the payout direction of the turning bar by the payout torque of the first torsion spring, and the payout torque of the first torsion spring acts at the start when turning the window body from the fully closed state to the open state.

[0013] As another example of the present invention, in a window opening / closing system, when the torsion of the first torsion spring returns at the time point after the start-up, the payout torque of the first torsion spring disappears, and when the rotating rod rotates in the direction of paying out the turning bar from the time point after the start-up, the first torsion spring is twisted in the winding direction or the direction opposite to the winding direction, and the first torsion spring generates a winding torque in the direction in which the roller winds up the turning bar. The rotation of the roller is biased in the winding direction of the turning bar by the winding torque of the first torsion spring.

[0014] As another example of the present invention, the rotation mechanism includes a second torsion spring that generates a torque proportional to the angle of twist in the direction opposite to the twist when the second torsion spring is installed on the rotating rod and twisted in the winding direction or the direction opposite to the winding direction. In the window opening / closing system, when the rotating rod rotates in the direction of winding up the turning bar and turns the window body from the open state toward the closed position, the second torsion spring is twisted in the winding direction or the direction opposite to the winding direction. When the window body is in the closed position where it is turned to the fully closed state, the second torsion spring generates a payout torque in the direction in which the roller pays out the turning bar. The rotation of the roller is biased in the payout direction of the turning bar by the payout torque of the second torsion spring, and the payout torque of the second torsion spring acts at the start when turning the window body from the fully closed state to the open state.

[0015] As another example of the present invention, the rotation mechanism includes a first torsion rotation number adjustment mechanism for the second torsion spring. In the window opening and closing system, when the window body is pivoted from the fully open state to the closed position, after the rotating rod rotates by the number of rotations set by the first torsion rotation number adjustment mechanism, the torsion of the second torsion spring starts.

[0016] As another example of the present invention, the first torsion rotation number adjustment mechanism is formed by a first rotation transmission plate installed on the rotating rod and rotating in conjunction with the rotation of the rotating rod, and a second rotation transmission plate arranged adjacent to the first rotation transmission plate in the axial direction and installed at one end of the second torsion spring. The first rotation transmission plate has a rotation transmission means for transmitting its rotation to the second rotation transmission plate, and the second rotation transmission plate has a rotation passive means for receiving the rotation of the first rotation transmission plate. In the first torsion rotation number adjustment mechanism, when the window body pivots from the fully open state to the closed position and the rotating rod rotates, the first rotation transmission plate rotates, and the rotation of the first rotation transmission plate is transmitted from the rotation transmission means to the second rotation transmission plate through the rotation passive means. The rotation of the rotating rod is transmitted to the second torsion spring through the rotation of the first rotation transmission plate and the second rotation transmission plate together, and the torsion of the second torsion spring starts.

[0017] As another example of the present invention, the first torsional rotation number adjustment mechanism is disposed between the first rotation transmission plate and the second rotation transmission plate and includes first to nth rotation plates arranged adjacent to each other in the axial direction of the first rotation transmission plate. The first to nth rotation plates have rotation receiving means for receiving the rotation of the first rotation transmission plate. In the first torsional rotation number adjustment mechanism, when the window body rotates from the fully open state to the closed position and the rotation rod rotates, the first rotation transmission plate rotates, and the rotation of the first rotation transmission plate is transmitted from the rotation transmission means to the first rotation plate through the rotation receiving means. Next, while the first rotation transmission plate and the first rotation plate rotate together, the rotation of the first rotation plate is transmitted from the first rotation plate to the second rotation plate through the rotation receiving means. Next, while the first rotation transmission plate and the first and second rotation plates rotate together, the rotation of the second rotation plate is transmitted from the second rotation plate to the third rotation plate through the rotation receiving means. In this way, the rotation of the first to nth rotation plates is sequentially transmitted from the first rotation plate to the nth rotation plate, and after the rotation of the rotation rod is sequentially transmitted from the first rotation transmission plate to the nth rotation plate, the rotation of the nth rotation plate is transmitted to the second rotation transmission plate through the rotation receiving means. The rotation of the rotation rod is transmitted to the second torsion spring through the rotation of the first rotation transmission plate, the first to nth rotation plates, and the second rotation transmission plate together, and the torsion of the second torsion spring starts.

[0018] As another example of the present invention, the number of the first to nth rotation plates of the first torsional rotation number adjustment mechanism is determined according to the number of turns of the turning strip around the roller.

[0019] As another example of the present invention, the rotation mechanism includes a second torsional rotation number adjustment mechanism for the first torsion spring. In the window opening and closing system, when the window body is rotated from the fully closed state to the open position, after the rotation rod rotates by the number of times set by the second torsional rotation number adjustment mechanism, the torsion of the first torsion spring starts.

[0020] As another example of the present invention, the torsional rotation speed second adjustment mechanism is formed by a first rotation transmission plate installed on the rotation rod and rotating in conjunction with the rotation of the rotation rod, and a second rotation transmission plate disposed adjacent to the first rotation transmission plate in the axial direction and installed at one end of the first torsion spring. The first rotation transmission plate has a rotation transmission means for transmitting its rotation to the second rotation transmission plate, and the second rotation transmission plate has a rotation passive means for receiving the rotation of the first rotation transmission plate. In the torsional rotation speed second adjustment mechanism, when the window body pivots from the fully closed state to the open position and the rotation rod rotates, the first rotation transmission plate rotates, and the rotation of the first rotation transmission plate is transmitted from the rotation transmission means to the second rotation transmission plate through the rotation passive means. The rotation of the rotation rod is transmitted to the first torsion spring through the rotation of the first rotation transmission plate and the second rotation transmission plate together, and the torsion of the first torsion spring begins.

[0021] As another example of the present invention, the second torsional rotation speed adjustment mechanism includes first to nth rotation plates arranged between the first rotation transmission plate and the second rotation transmission plate and adjacent to each other in the axial direction of the first rotation transmission plate. The first to nth rotation plates have rotation receiving means for receiving the rotation of the first rotation transmission plate. In the second torsional rotation speed adjustment mechanism, when the window body pivots from the fully closed state to the open position and the rotary rod rotates, the first rotation transmission plate rotates, and the rotation of the first rotation transmission plate is transmitted from the rotation transmission means to the first rotation plate via the rotation receiving means. Next, while the first rotation transmission plate and the first rotation plate rotate together, the rotation of the first rotation plate is transmitted from the first rotation plate to the second rotation plate via the rotation receiving means. Next, while the first rotation transmission plate, the first and second rotation plates rotate together, the rotation of the second rotation plate is transmitted from the second rotation plate to the third rotation plate via the rotation receiving means. In this way, the rotation of the first to nth rotation plates is sequentially transmitted from the first rotation plate to the nth rotation plate, and after the rotation of the rotary rod is sequentially transmitted from the first rotation transmission plate to the nth rotation plate, the rotation of the nth rotation plate is transmitted to the second rotation transmission plate via the rotation receiving means. The rotation of the rotary rod is transmitted to the first torsion spring through the rotation of the first rotation transmission plate, the first to nth rotation plates, and the second rotation transmission plate together, and the torsion of the first torsion spring starts.

[0022] As another example of the present invention, the number of the first to nth rotation plates of the second torsional rotation speed adjustment mechanism is determined according to the number of turns of the pivoting strip around the roller.

Advantages of the Invention

[0023] According to the window opening and closing system of the present invention, when the rotary rod rotates in the direction of feeding out the swivel bar, the first torsion spring is twisted in the winding direction or the direction opposite to the winding direction, and the first torsion spring generates a winding torque (winding spring force) in the direction in which the roller winds up the swivel bar. When the window body is in the open state, the rotation of the roller is urged in the winding direction of the swivel bar by the winding torque of the first torsion spring, and the rotational load acting on the rotary rod when the window body is pivoted from the open state to the closed state is reduced by the winding torque. Therefore, the winding of the swivel chain around the roller is promoted by the winding torque of the first torsion spring, the operating load acting when the window body is closed can be reduced, and the opened window body can be easily closed without applying a large force.

[0024] In a window opening and closing system in which the free end of the window body pivots downward in the vertical direction and the window body is opened from the closed state, and the torque of the first torsion spring is adjusted so that the free end of the window body automatically pivots downward in the vertical direction by the weight of the window body when the window body is opened. By adjusting the torque (spring force) of the first torsion spring, when the window body is opened, the free end of the window body automatically pivots downward in the vertical direction by the weight of the window body. Therefore, the window body can be automatically pivoted from the closed state to the open state, and in an emergency, the free end of the window body can be smoothly pivoted from the closed state to the open state, and the window body can be quickly opened without taking time and effort.

[0025] When the swing bar is wound in the other direction to swing the window body from the open state to the fully closed state, the torsion of the first torsion spring returns, and the winding torque of the first torsion spring disappears. Since the winding torque of the first torsion spring disappears when the window body is swung from the open state to the fully closed state, the winding torque of the first torsion spring does not act on the rotating rod in the closed state of the window body, and the winding torque of the first torsion spring can be maximized when the free end of the window body swings to the fully open position. Since the window opening and closing system can make full and effective use of the winding torque of the first torsion spring, the operating load acting on the window body when it is closed by the first torsion spring can be reliably reduced, and the opened window body can be easily closed without applying a large force.

[0026] When the swing bar is wound in the other direction to swing the window body from the open state to the fully closed state, after the torsion of the first torsion spring returns and the winding torque of the first torsion spring disappears, the first torsion spring is twisted in the winding direction or the direction opposite to the winding direction. In the closed state where the window body has swung to the fully closed position, the roller is urged in the direction of feeding out the swing bar by the feeding torque of the first torsion spring developed by the first torsion spring, and the rotation of the roller is biased in the feeding direction of the swing bar by the feeding torque of the first torsion spring. The window opening and closing system in which the feeding torque of the first torsion spring acts at the start when the window body is swung from the fully closed state to the open state can utilize the feeding torque of the first torsion spring at the start when opening the window body from the fully closed state, so that the free end of the window body can be smoothly swung downward in the vertical direction without resistance at the start, and the window body can be smoothly swung from the closed state to the open state to easily open the window body.

[0027] When the torsion of the first torsion spring returns after the initial movement, the payout torque of the first torsion spring disappears, and when the rotary rod rotates in the direction of paying out the swivel strip from the time point after the initial movement, the first torsion spring is twisted in the winding direction or the direction opposite to the winding direction, and the first torsion spring generates a winding torque in the direction in which the roller winds up the swivel strip, and the rotation of the roller is biased in the winding direction of the swivel strip by the winding torque of the first torsion spring. The window opening and closing system can utilize the payout torque of the first torsion spring at the initial movement when opening the window body from the fully closed state, so that the free end of the window body can be swiveled downward in the vertical direction without resistance at the initial movement. After the initial movement, the first torsion spring generates a winding torque (winding spring force), and the rotational load acting on the rotary rod when the window body is swiveled from the open state to the closed state is reduced by the winding torque, and the operating load acting when the window body is closed can be reduced, and the opened window body can be easily closed without requiring a large force.

[0028] When the rotating mechanism is installed on the rotating rod and is twisted in the winding direction or the direction opposite to the winding direction, it includes a second torsion spring that generates a torque proportional to the angle of twist in the direction opposite to the twist. When the rotating rod rotates in the direction of winding up the turning strip and the window body is rotated from the open state toward the closed position, the second torsion spring is twisted in the winding direction or the direction opposite to the winding direction. When the window body is in the closed position where it has rotated to the fully closed state, the roller generates a payout torque in the direction of paying out the turning strip, and the rotation of the roller is biased in the direction of paying out the turning strip by the payout torque of the second torsion spring. The window opening and closing system in which the payout torque of the second torsion spring acts at the start of movement when rotating the window body from the fully closed state to the open state can, at the start of movement (when starting to rotate) of rotating the window body from the fully closed position to the open state, promote (facilitate) the rotation of the free end of the window body by the payout torque of the second torsion spring, and can easily rotate the free end of the window body from the closed position toward the open position at the start of movement. The window body can be smoothly rotated from the closed state to the open state, and the window body can be quickly opened from the closed position to the open position.

[0029] The rotating mechanism includes a first torsion rotation number adjustment mechanism for the second torsion spring. When the window body is rotated from the fully open state to the closed position, after the rotating rod rotates by the set number of times by the first torsion rotation number adjustment mechanism, the torsion of the second torsion spring starts. The window opening and closing system can twist the second torsion spring after the rotating rod rotates by a predetermined number of times by using the first torsion rotation number adjustment mechanism, can adjust the strength of the payout torque of the second torsion spring, and can freely adjust the kicking force of the free end of the window body at the start of operation. When the payout torque of the second torsion spring is too strong, the window opening and closing system cannot smoothly rotate the free end of the window body to the fully closed position by the payout torque of the second torsion spring when rotating the free end of the window body to the fully closed position, and the closing of the window body may be incomplete. However, by adjusting the strength of the payout torque of the second torsion spring by the first torsion rotation number adjustment mechanism and adjusting the kicking force of the free end of the window body at the start of operation, the free end of the window body can be smoothly rotated to the fully closed position, and incomplete closing of the window body can be prevented.

[0030] The torsional rotation speed first adjustment mechanism is formed by a first rotation transmission plate installed on the rotary rod and rotating in conjunction with the rotation of the rotary rod, and a second rotation transmission plate arranged adjacent to the first rotation transmission plate in the axial direction and installed at one end of the second torsion spring. The first rotation transmission plate has rotation transmission means for transmitting its rotation to the second rotation transmission plate, and the second rotation transmission plate has rotation passive means for receiving the rotation of the first rotation transmission plate. In the torsional rotation speed first adjustment mechanism, when the window body pivots from the fully open state to the closed position and the rotary rod rotates, the first rotation transmission plate rotates, and the rotation of the first rotation transmission plate is transmitted from the rotation transmission means to the second rotation transmission plate through the rotation passive means. When the first rotation transmission plate and the second rotation transmission plate rotate together, the rotation of the rotary rod is transmitted to the second torsion spring, and the torsion of the second torsion spring begins. The window opening and closing system can twist the second torsion spring after the rotary rod rotates a set predetermined amount by using the first rotation transmission plate and the second rotation transmission plate. It can adjust the strength of the payout torque of the second torsion spring and can also adjust the kicking force of the free end of the window body at the start of operation.

[0031] The torsional rotation speed first adjustment mechanism is disposed between the first rotation transmission plate and the second rotation transmission plate and includes first to nth rotation plates arranged adjacent to each other in the axial direction of the first rotation transmission plate. The first to nth rotation plates have rotation receiving means for receiving the rotation of the first rotation transmission plate. In the torsional rotation speed first adjustment mechanism, when the window body pivots from the fully open state to the closed position and the rotation rod rotates, the first rotation transmission plate rotates, and the rotation of the first rotation transmission plate is transmitted from the rotation transmission means to the first rotation plate through the rotation receiving means. Next, while the first rotation transmission plate and the first rotation plate rotate together, the rotation of the first rotation plate is transmitted from the first rotation plate to the second rotation plate through the rotation receiving means. Next, while the first rotation transmission plate and the first and second rotation plates rotate together, the rotation of the second rotation plate is transmitted from the second rotation plate to the third rotation plate through the rotation receiving means. In this way, the rotation of the first to nth rotation plates is sequentially transmitted from the first rotation plate toward the nth rotation plate, and after the rotation of the rotation rod is sequentially transmitted from the first rotation transmission plate toward the nth rotation plate, the rotation of the nth rotation plate is transmitted to the second rotation transmission plate through the rotation receiving means. The window opening and closing system in which the first rotation transmission plate, the first to nth rotation plates, and the second rotation transmission plate rotate together so that the rotation of the rotation rod is transmitted to the second torsion spring and the torsion of the second torsion spring starts can, by using the first rotation transmission plate, the first to nth rotation plates, and the second rotation transmission plate, twist the second torsion spring after the rotation rod rotates a set number of times, can adjust the strength of the payout torque of the second torsion spring, and can freely adjust the kicking force of the free end of the window body at the start of operation.The window opening and closing system can increase the payout torque of the second torsion spring by reducing the number of the first to nth rotating plates, thereby increasing the kicking force of the free end of the window body at the start. By increasing the number of the first to nth rotating plates, the payout torque of the second torsion spring can be weakened, and the kicking force of the free end of the window body at the start can be weakened. By adjusting the number of the first to nth rotating plates, the payout torque of the second torsion spring can be increased or decreased, and the kicking force of the free end of the window body at the start can be freely adjusted. The window opening and closing system can optimally adjust the payout torque of the second torsion spring and the kicking force of the free end of the window body according to the characteristics of the window body such as size, weight, and shape by adjusting the number of the first to nth rotating plates, and can smoothly swing the window body from the closed state to the open state and quickly open the window body from the closed position to the open position.

[0032] In the window opening and closing system where the number of the first to nth rotating plates of the first torsional rotation number adjusting mechanism is determined according to the number of turns of the turning strip around the roller, by determining the number of the first to nth rotating plates of the first torsional rotation number adjusting mechanism according to the number of turns of the turning strip around the roller, the second torsion spring can be twisted after the rotating rod rotates a predetermined number of times, the payout torque of the second torsion spring can be optimally adjusted, and the kicking force of the free end of the window body at the start can be optimally adjusted. The window opening and closing system can increase the payout torque of the second torsion spring by reducing the number of the first to nth rotating plates, thereby increasing the kicking force of the free end of the window body at the start. By increasing the number of the first to nth rotating plates, the payout torque of the second torsion spring can be weakened, and the kicking force of the free end of the window body at the start can be weakened. By adjusting the number of the first to nth rotating plates according to the number of turns of the turning strip around the roller, the payout torque of the second torsion spring can be increased or decreased, and the kicking force of the free end of the window body at the start can be optimally adjusted.

[0033] The rotating mechanism includes a second torsion spring rotation number adjustment mechanism. When the window body is rotated from the fully closed state to the open position, after the rotating rod rotates by the set number of times by the second torsion spring rotation number adjustment mechanism, the torsion of the first torsion spring starts. The window opening and closing system can use the second torsion spring rotation number adjustment mechanism to twist the first torsion spring after the rotating rod rotates by the set number of times, and can adjust the strength of the winding torque of the first torsion spring. At the same time, the winding torque of the first torsion spring can be freely adjusted according to the characteristics such as the size, weight, and shape of the window body. When the winding torque of the first torsion spring is too strong, the window opening and closing system may not be able to smoothly rotate the free end of the window body to the fully open position when rotating the free end of the window body to the fully open position, and the opening of the window body may be incomplete. However, by adjusting the strength of the winding torque of the first torsion spring by the second torsion spring rotation number adjustment mechanism, the free end of the window body can be smoothly rotated to the fully open position, and the window body can be quickly opened.

[0034] The torsional rotation speed second adjustment mechanism is formed by a first rotation transmission plate installed on the rotation rod and rotating in conjunction with the rotation of the rotation rod, and a second rotation transmission plate arranged adjacent to the first rotation transmission plate in the axial direction and installed at one end of the first torsion spring. The first rotation transmission plate has a rotation transmission means for transmitting its rotation to the second rotation transmission plate, and the second rotation transmission plate has a rotation passive means for receiving the rotation of the first rotation transmission plate. When the window body pivots from the fully closed state to the open position and the rotation rod rotates, the first rotation transmission plate rotates, and the rotation of the first rotation transmission plate is transmitted from the rotation transmission means to the second rotation transmission plate through the rotation passive means. The rotation of the rotation rod is transmitted to the first torsion spring through the rotation of the first rotation transmission plate and the second rotation transmission plate together, and the torsion of the first torsion spring starts. The window opening and closing system can twist the first torsion spring after the rotation rod rotates a predetermined amount set by using the first rotation transmission plate and the second rotation transmission plate. It can adjust the strength of the winding torque of the first torsion spring and reduce the operating load acting when the window body is closed.

[0035] The torsional rotation speed second adjustment mechanism is disposed between the first rotation transmission plate and the second rotation transmission plate and includes first to nth rotation plates arranged adjacent to each other in the axial direction of the first rotation transmission plate. The first to nth rotation plates have rotation receiving means for receiving the rotation of the first rotation transmission plate. In the torsional rotation speed second adjustment mechanism, when the window body pivots from the fully closed state to the open position and the rotation rod rotates, the first rotation transmission plate rotates, and the rotation of the first rotation transmission plate is transmitted from the rotation transmission means to the first rotation plate through the rotation receiving means. Next, while the first rotation transmission plate and the first rotation plate rotate together, the rotation of the first rotation plate is transmitted from the first rotation plate to the second rotation plate through the rotation receiving means. Next, while the first rotation transmission plate and the first and second rotation plates rotate together, the rotation of the second rotation plate is transmitted from the second rotation plate to the third rotation plate through the rotation receiving means. In this way, the rotation of the first to nth rotation plates is sequentially transmitted from the first rotation plate toward the nth rotation plate, and after the rotation of the rotation rod is sequentially transmitted from the first rotation transmission plate toward the nth rotation plate, the rotation of the nth rotation plate is transmitted to the second rotation transmission plate through the rotation receiving means. The window opening and closing system in which the rotation of the rotation rod is transmitted to the first torsion spring and the torsion of the first torsion spring starts by the first rotation transmission plate, the first to nth rotation plates, and the second rotation transmission plate rotating together can twist the first torsion spring after the rotation rod rotates a set number of times by using the first rotation transmission plate, the first to nth rotation plates, and the second rotation transmission plate. The strength of the winding torque of the first torsion spring can be adjusted, and the adjusted winding torque of the first torsion spring can be used to easily close the opened window body without requiring a large force.The window opening and closing system can increase the winding torque of the first torsion spring by reducing the number of the first to the nth rotating plates, and can decrease the winding torque of the first torsion spring by increasing the number of the first to the nth rotating plates. By adjusting the number of the first to the nth rotating plates, the winding torque of the first torsion spring can be increased or decreased, and the operating load acting when the window body is closed can be reduced. The window opening and closing system can optimally adjust the winding torque of the first torsion spring according to the characteristics such as the size, weight, and shape of the window body by adjusting the number of the first to the nth rotating plates, and can smoothly turn the window body from the open state to the closed state to close the window body.

[0036] In the window opening and closing system where the number of the first to the nth rotating plates of the second adjustment mechanism for the torsional rotation number is determined according to the number of turns of the turning strip around the roller, by determining the number of the first to the nth rotating plates according to the number of turns of the turning strip around the roller, the first torsion spring can be twisted after the rotating rod rotates a predetermined number of times, and the winding torque of the first torsion spring can be optimally adjusted. The window opening and closing system can increase the winding torque of the first torsion spring by reducing the number of the first to the nth rotating plates, and can decrease the winding torque of the first torsion spring by increasing the number of the first to the nth rotating plates. By adjusting the number of the first to the nth rotating plates according to the number of turns of the turning strip around the roller, the winding torque of the first torsion spring can be increased or decreased.

Embodiments for Carrying Out the Invention

[0037] Referring to the attached drawings such as FIG. 1, which is a front view of the opening and closing window 11 equipped with the window opening and closing system 10 shown as an example, the details of the window opening and closing system according to the present invention will be described as follows. Note that FIG. 2 is a top view of the opening and closing window 11, and FIG. 3 is a partially enlarged front view of the opening and closing window 11 showing the state of the window body 13 during opening. FIG. 4 is a partially enlarged front view of the housing unit 29 showing an example of the rotation mechanism 15, and FIG. 5 is a partially enlarged front view of the housing unit 29 following FIG. 4. In FIG. 1, the window facility 22 is partially shown. In FIGS. 3 to 5, the roller 26, the ring mounting drum 27, and the first torsion spring 28 are shown in an exposed state. In FIGS. 4 and 5, the illustration of the window body 13 is omitted. In FIGS. 1 and 2, the vertical direction is indicated by arrow X, the horizontal direction is indicated by arrow Y, and the front-rear direction is indicated by arrow Z.

[0038] The window opening and closing system 10 is installed on the opening and closing window 11. The opening and closing window 11 is installed in a building and used for air replacement (indoor ventilation). The window opening and closing system 10 includes a window body 13 (shoji) installed on the window frame 12, a turning chain 14 (turning strip) for turning the window body 13, and a rotation mechanism 15. The window frame 12 (opening and closing window 11) is installed at a high place (near the ceiling) of a predetermined building and is formed in a horizontally long rectangle. The window frame 12 includes an upper frame 16 installed near the ceiling and extending straight in the horizontal direction, a lower frame 17 installed below the upper frame 16 and extending straight in the horizontal direction, and both side frames 18 located between the upper and lower frames 16 and 17 and extending straight in the vertical direction.

[0039] In the window frame 12, the upper frame 16 and the lower frame 17 are spaced apart and opposed to each other in the vertical direction so as to be parallel to each other, and both side frames 18 are spaced apart and opposed to each other in the horizontal direction so as to be parallel to each other. In the window frame 12, the upper and lower frames 16 and 17 and both side frames 18 form a horizontally long rectangular window (shoji) installation space. There is no particular limitation on the size and shape of the window frame 12, and its size and shape can be freely designed.

[0040] The upper and lower frames 16 and 17 and the both-side frames 18 are formed in a substantially angled shape (L-shaped). The upper frame 16 has an upper frame plate that is positioned directly above the free end 20 of the window body 13 and extends horizontally in the closed state of the window body 13, and an upper contact plate that extends horizontally orthogonally to the upper frame plate and with which the rear surface of the free end 20 of the window body 13 is airtightly contacted. The lower frame 17 has a lower frame plate that is positioned directly below the rotating end 19 of the window body 13 and extends horizontally, and a lower contact plate that extends horizontally orthogonally to the lower frame plate and with which the rear surface of the rotating end 19 of the window body 13 is airtightly contacted. The both-side frames 18 have side frame plates that are positioned laterally to both side portions 21 of the window body 13 and extend vertically, and both-side contact plates that extend vertically orthogonally to the side frame plates and with which the rear surfaces of both side portions 21 of the window body 13 are airtightly contacted.

[0041] For the window frame 12, a resin sash, an aluminum sash, or an aluminum-resin composite sash is used, and the window frame 12 is connected to the wall by existing connection means. Immediately below the window frame 12 (window body 13), an openable window facility 22 in which glass (glass shoji) is fitted into the window frame 12 (resin sash, aluminum sash, or aluminum-resin composite sash) is provided. The window frame 12 and the window facility 22 are connected by existing connection means. Note that there may be a case where a wall is provided immediately below the window frame 12 (window body 13).

[0042] The window body 13 (shoji) is rotatably attached to the window frame 12, rotates from the closed state (closed position) to the open state (open position), and rotates from the open state to the closed state. There are no particular limitations on the size and shape of the window body 13, and its size and shape can be freely designed according to the size and shape of the window frame 12. The window body 13 has a rotating end 19 (rotating frame) that is rotatably connected (installed) to the lower frame 17 of the window frame 12 and extends straight horizontally, a free end 20 (swing frame) that extends straight horizontally while being spaced apart and opposed upward from the rotating end 19, and both side portions 21 (both-side frames) that extend straight vertically while being spaced apart and opposed horizontally. A shoji fitting 23 is installed and fixed at the horizontal center of the free end 20.

[0043] When the window body 13 is in the closed position, the rotating end portion 19 is airtightly adhered to the lower contact plate of the lower frame 17, and when the window body 13 is in the closed position, both side portions 21 are airtightly adhered to the both side contact plates of the both side frames 18. In the closed state of the window body 13, the free end portion 20 is pivoted to the closed position where it is airtightly adhered to the upper contact plate of the upper frame 16, and in the open state of the window body 13, the free end portion 20 is pivoted to the open position downward in the vertical direction. Glass is fitted into the window body 13 (inside the rotating end portion 19, the free end portion 20, and both side portions 21). The rotating end portion 19, the free end portion 20, and both side portions 21 are made of a resin sash, an aluminum sash, or an aluminum-resin composite sash.

[0044] The pivot chain 14 (roller chain) is made of a metal such as steel, stainless steel, or titanium (the same applies to the first and second pivot chains 14a and 14b described later). The tip end portion of the pivot chain 14 is connected to the shoji fitting 23 of the free end portion 20 of the window body 13. The pivot chain 14 pivots the window body 13 from the closed state (closed position) to the open state (open position), and also pivots the window body 13 from the open state (open position) to the closed state (closed position).

[0045] The pivot chain 14 has a linear movement property (straight advancement property) in its axial direction. When the window body 13 is pivoted from the closed state to the open state at the initial movement (start of pivoting), the pivot chain 14 exhibits a feeding force (kicking force) that promotes (accelerates) the pivoting of the free end portion 20 by its linear movement property, and when the window body 13 is pivoted from the open state to the closed state at the initial movement, a pivoting force is applied to the free end portion 20 of the window body 13. In addition to the pivot chain 14, a pivot wire can also be used as the pivot bar. When a pivot wire is used, a kicking mechanism (damper or spring) that applies a kicking force to the free end portion 20 at the initial movement of opening the window body 13 is installed on the window body 13 or the window frame 12.

[0046] The window opening / closing system 10 is configured such that when the swivel chain 14 is fed out in one direction (forward in the front-rear direction), the free end 20 of the window body 13 that is airtightly adhered to the upper frame 16 pivots downward in the vertical direction about the pivot end 19, and the window body 13 pivots from the closed state (closed position) to the open state (open position) (see Fig. 4). The pivoting angle of the window body 13 downward in the vertical direction varies depending on the feeding dimension of the swivel chain 14, and the opening area when the window body 13 is opened can be adjusted by adjusting the feeding dimension of the swivel chain 14. The window opening / closing system 10 is configured such that when the swivel chain 14 is pulled in the other direction (rearward in the front-rear direction), the free end 20 of the window body 13 that has pivoted downward in the vertical direction pivots upward in the vertical direction about the pivot end 19, and the window body 13 pivots from the open state (open position) to the closed state (closed position) (see Fig. 5).

[0047] The rotation mechanism 15 feeds out the swivel chain 14 in one direction (forward in the front-rear direction) or pulls in (winds up) the swivel chain 14 in the other direction (rearward in the front-rear direction). The rotation mechanism 15 is formed by a high window operator 24 (chain type operator) (rotary force applying means), a rotary rod 25, rollers 26, a ring mounting drum 27, and a first torsion spring 28 (coil spring). The rotary rod 25, the rollers 26, the ring mounting drum 27, and the first torsion spring 28 are installed (accommodated) in the housing unit 29.

[0048] The high window operator 24 (rotary force applying means) is formed by a sprocket 30 made of a metal such as carbon steel, rolled steel, stainless steel, sintered alloy, or a synthetic resin, and a loop-shaped ball chain 31 that rotates the sprocket 30 in the clockwise direction or the counterclockwise direction. The sprocket 30 may be made of a combination of a plurality of gears. The ball chain 31 is engaged with the teeth of the sprocket 30.

[0049] In the operator 24 for the high window, by operating one side of the ball chain 31 hanging downward from the sprocket 30 downward, the sprocket 30 rotates counterclockwise, and thereby the rotating rod 25 rotates counterclockwise. By operating the other side of the ball chain 31 downward, the sprocket 30 rotates clockwise, and thereby the rotating rod 25 rotates clockwise.

[0050] The rotating rod 25 is made of a metal such as an aluminum alloy or stainless steel or a synthetic resin, and is formed in a cylindrical shape (the same applies to the first and second rotating rods 25a and 25b described later). The rotating rod 25 is rotatably accommodated in the accommodating unit 29 (rotatably installed in the window frame 12) and extends horizontally. One end portion and the middle portion of the rotating rod 25 are rotatably supported by the bearing plate 32 of the accommodating unit 29. A sprocket 30 of the operator 24 for the high window is attached to the other end portion of the rotating rod 25. The rotating rod 25 is given a rotational force by the operator 24 for the high window (rotational force applying means) and rotates in the clockwise direction (positive direction) or the counterclockwise direction (reverse direction).

[0051] The roller 26 is made of a metal such as an aluminum alloy or stainless steel, and is formed in a cylindrical shape (the same applies to the first and second rollers 26a and 26b described later). The roller 26 is accommodated in the accommodating unit 29 and is installed (fitted) between one end portion and the middle portion of the rotating rod 25. The roller 26 rotates in the clockwise direction (positive direction) or the counterclockwise direction (reverse direction) as the rotating rod 25 rotates. The other end portion of the turning chain 14 is connected and fixed to the roller 26. When looking at the sprocket 30 from the side of the other end portion of the rotating rod 25, when the roller 26 rotates counterclockwise (in the direction of the arrow in FIG. 4), as shown in FIG. 4, the turning chain 14 is fed out in one direction (forward in the front-rear direction) from the roller 26. When the roller 26 rotates clockwise, as shown in FIG. 5, the turning chain 13 is drawn in the other direction (rearward in the front-rear direction) by the roller 26.

[0052] The ring attachment drum 27 is made of a metal such as an aluminum alloy or stainless steel and is formed in a cylindrical shape (the same applies to the first and second ring attachment drums 27a and 27b described later). The ring attachment drum 27 is housed in the housing unit 29 and is installed (fitted) on the side of one end of the rotating rod 25 (laterally outward of the roller 26). The ring attachment drum 27 rotates in the clockwise direction (positive direction) or counterclockwise direction (reverse direction) in conjunction with the rotating rod 25. Incidentally, depending on the size and shape of the window body 13, the ring attachment drum 27 may be installed (fitted) in the middle of the rotating rod 25, and the roller 26 may be installed (fitted) on the side of one end of the rotating rod 25 (laterally outward of the ring attachment drum 27).

[0053] The first torsion spring 28 is made of a hard steel wire, stainless steel wire, or phosphor bronze for springs (the same applies to the second torsion spring 34, and the first and second torsion springs 82a and 82b described later). The first torsion spring 28 is attached to the ring attachment drum 27 and extends in the axial direction of the rotating rod 25. The arm shape of the first torsion spring 28 (including the second torsion spring 34, and the first and second torsion springs 82a and 82b) can use a short hook, straight, single bend, etc. The outer diameter, inner diameter, and number of turns of the first torsion spring 28 (including the second torsion spring 34, and the first and second torsion springs 82a and 82b) can be arbitrarily set according to the torque (winding torque or payout torque) required for the upward turning of the window body (shoji) in the vertical direction.

[0054] In the rotating mechanism 15, with the ring mounting drum 27 inserted through the first torsion spring 28, the fixed point of the arm of the first torsion spring 28 is connected and fixed to either the support plate 40 or the bearing plate 32 of the housing unit 29, and the load point of the arm of the first torsion spring 28 is connected and fixed to the outer peripheral edge of the rotating rod 25. When the rotating rod 25 rotates and the swivel chain 14 is fed out from the roller 26 in one direction (forward in the front-rear direction), the first torsion spring 28 rotates counterclockwise together with the ring mounting drum 27, twists in the winding direction, or twists in the direction opposite to the winding direction. Conversely, when the rotating rod 25 rotates and the swivel chain 14 is wound onto the roller 26 in the other direction (backward in the front-rear direction), the first torsion spring 28 rotates clockwise together with the ring mounting drum 27, and the twist returns.

[0055] When the first torsion spring 28 is twisted in the direction opposite to the winding direction, it generates torque (repulsive force) in the opposite direction (winding direction) proportional to the twisted angle. When it is twisted in the winding direction, it generates torque (repulsive force) in the opposite direction (opposite to the winding direction) proportional to the twisted angle. In the window opening and closing system 10, the torque (outer diameter, inner diameter, number of turns, coefficient of restitution) of the first torsion spring 28 is adjusted so that the load acting on the sprocket 30 (ball chain 31) when the free end 20 of the window body 13 is pivoted upward in the vertical direction from the fully open state (open position) toward the closed position is about 1.5 to 2 kgf.

[0056] FIG. 6 is a side view of the window opening / closing system 10 with the window body 13 fully closed, and FIG. 7 is a side view of the window opening / closing system 10 showing the initial movement state in which the free end 20 of the window body 13 is slightly pivoted downward in the vertical direction. FIG. 8 is a side view of the window opening / closing system 10 with the window body 13 fully open, and FIG. 9 is a graph showing an example of the relationship between the operating load and the pivoting angle of the window body 13. FIG. 10 is a graph showing another example of the relationship between the operating load and the pivoting angle of the window body 13. In the graph of FIG. 9, it is an example where the torsion of the first torsion spring 28 becomes 0 when the window body 13 is in the fully closed state, and in the graph of FIG. 10, the torsion of the first torsion spring 28 becomes 0 at a position where the window body 13 is open rather than at a position where the position of the rotation center P and the center of gravity G of the window body 13 in the vertical direction coincide. In the graph of FIG. 9, the operating load is smaller compared to that in the graph of FIG. 10. In FIGS. 6 to 8, the illustration of the ball chain 31 is omitted.

[0057] To pivot the free end 20 of the window body 13 from the state where the window body 13 is fully closed to the fully open position, one side of the ball chain 31 is actuated downward, the sprocket 30 is rotated counterclockwise, and the rotating rod 25 is rotated counterclockwise. At the initial movement (start of pivoting) when the window body 13 is pivoted from the fully closed state to the open state, when the pivoting chain 14 is fed out from the roller 26 in one direction (forward in the front-rear direction), due to the linearity (straight-ahead property) of the pivoting chain 14, the pivoting chain 14 exerts a feeding force (kicking force) that promotes (accelerates) the downward pivoting of the free end 20 of the window body 13 in the vertical direction, and the free end 20 of the window body 13 is pressed (pushed out) forward in the front-rear direction by the pivoting chain 14, and a downward pivoting force is applied to the free end 20 of the window body 13 in the vertical direction.

[0058] When the free end 20 of the window body 13 rotates from the closed position to the open position during the initial movement, it rotates by utilizing the feeding force of the turning chain 14. After that, during the turning process except for the initial movement, the operating ball chain 31 moves downward, causing the rotary rod 25 to rotate counterclockwise (the counterclockwise direction when looking at the sprocket 30 from the side of the other end of the rotary rod 25). The turning chain 14 is fed out in one direction (forward in the front-rear direction), and the free end 20 of the window body 13 rotates downward in the vertical direction around the rotating end 19. When the window body 13 rotates to the fully open position (see FIG. 8) and the window body 13 is opened, the operation of the ball chain 31 stops. When the downward operation of the ball chain 31 is stopped midway, a locking mechanism that locks the operation of the ball chain 31 of the high window operator 24 (not shown) operates, stopping the rotation of the free end 20 of the window body 13, and the window body 13 can be opened at a predetermined opening degree.

[0059] When the rotary rod 25 rotates in the direction (counterclockwise direction) in which the turning chain 14 (turning strip) is fed out in the window opening and closing system 10, the first torsion spring 28 is twisted in the winding direction or the direction opposite to the winding direction, and the first torsion spring 28 generates a winding torque (winding spring force) in the direction in which the roller 26 winds up the turning chain 14 (turning strip). In the window opening and closing system 10, the rotation of the roller 26 is biased in the winding direction of the turning chain 14 (turning strip) by the winding torque of the first torsion spring 28, and the winding of the turning chain 14 around the roller 26 is promoted (facilitated) by the winding torque of the first torsion spring 28. When the free end 20 of the window body 13 is rotated from the fully open state (open position) to the closed state (closed position), the rotational load acting on the rotary rod 25 (the operating load acting when the window body 13 is closed) is reduced by the winding torque of the first torsion spring 28.

[0060] When the first torsion spring 28 is not installed, the change in the operating load of the window body 13 (the change in the operating load acting on the turning chain 14 (turning strip)) from the state where the free end 20 of the window body 13 shown in FIG. 6 rotates to the fully closed position to the state where the free end 20 of the window body 13 shown in FIG. 8 rotates to the fully open position is shown by the solid line in FIG. 9. The operating load of the window body 13 (shoji) when the first torsion spring 28 is not installed is calculated by F1 (operating load) = F / cosθ3. Here, F = T / L2 and θ3 = 90° - θa. T is the torque at the rotation center P (center of the rotation end 19) required for opening and closing the window body 13 (shoji), T (torque) = weight of the window body 13 (shoji) × r (moment arm), and r (moment arm) = L1 × sinθ1. L1 is the distance from the rotation center P (center of the rotation end 19) of the window body 13 (shoji) to the center of gravity G of the window body 13 (shoji), and L2 is the distance from the rotation center P (center of the rotation end 19) of the window body 13 (shoji) to the operation position O. θ1 is the angle formed by the vertical line passing through the center of gravity G of the window body 13 (shoji) and the line connecting the rotation center P and the center of gravity G. θa is the angle formed by the line connecting the rotation center P and the operation position O and the tangent to the pitch circle of the sprocket 30 passing through the operation position O.

[0061] F1 (operating load) increases (increases) with the coincidence point where the rotation center P (center of the rotation end 19) in the vertical direction of the window body 13 (shoji) coincides with the center of gravity G of the window body 13 (shoji) as the boundary, and reaches the maximum when the free end 20 of the window body 13 rotates to the fully open position. When the rotation angle θ1 of the window body 13 (shoji) decreases with the coincidence point as the boundary, F1 (operating load) acts in the closing direction (-), and when the rotation angle θ1 of the window body 13 (shoji) increases with the coincidence point as the boundary, F1 (operating load) acts in the opening direction (+). Incidentally, F1 (operating load) is a function of sinθ1 and cosθ3 as described above.

[0062] Next, in the window opening / closing system 10 in which the first torsion spring 28 is installed, the change in the operation load reduction force caused by the repulsive force generated in the first torsion spring 28 from the state where the free end 20 of the window body 13 shown in FIG. 6 rotates to the fully closed position to the state where the free end 20 of the window body 13 shown in FIG. 8 rotates to the fully open position is shown by a dotted line in FIGS. 9 and 10. As described above, in the graph of FIG. 9, the operation load (operation load), which is the difference between the operation load F1 and the operation load reduction force F2, is smaller than that in the graph of FIG. 10.

[0063] The operation load reduction force F2 of the window body 13 (shoji) when the first torsion spring 28 is installed (the operation load reduction force caused by the repulsive force that appears in proportion to the twisted angle of the first torsion spring 28) is calculated as F2 (operation load reduction force) = spring constant of the first torsion spring 28 × twisted angle of the first torsion spring 28 ÷ winding radius of the turning chain 14 (turning strip). The spring constant (N·mm / degree) of the first torsion spring 28 is determined by the spring design conditions. The twisted angle of the first torsion spring 28 is L3 ÷ circumferential length of the spring × 360. L3 is the payout amount of the turning chain 14 (turning strip), and L3 = L2 × sin θ2 × 2. θ2 = θ ÷ 2. θ is the rotation angle of the window body 13 (shoji). Incidentally, F2 (operation load) is a function of sin θ2 (sin(θ / 2)) as described above.

[0064] The operation load (operation load) when the first torsion spring 28 is installed (window opening / closing system 10) is F1 (operation load) - F2 (operation load reduction force). By selecting the spring design conditions (linear, mean diameter), the operation load reduction force F2 can be changed, and the operation load (operation load), which is the difference from the operation load F1, can be adjusted, and the operation load required for the closing operation of the window body 13 can be arbitrarily determined.

[0065] Even when the weight of the window body 13 increases, the operating load required for the closing operation of the window body 13 can be arbitrarily determined by selecting spring design conditions (linearity, mean diameter). As can be seen from FIGS. 9 and 10, at a position where the window body 13 (shoji) is opened rather than at a position where the positions of the rotation center P and the center of gravity G of the window body 13 (shoji) in the vertical direction coincide, the torsion of the first torsion spring 28 is set to 0, and by making the torsion of the first torsion spring 28 reverse with this position as a boundary, the operating load can be set to be in the opening direction.

[0066] To close the window body 13 by pivoting the free end 20 of the window body 13 upward in the vertical direction from the open state where the free end 20 of the window body 13 is pivoted to the fully open position, by operating the other side of the ball chain 31 downward, the sprocket 30 is rotated in the clockwise direction, and the rotary rod 25 is rotated in the clockwise direction. By the downward operation of the ball chain 31, the rotary rod 25 rotates in the clockwise direction, the pivot chain 14 is wound around the roller 26 in the other direction (rearward in the front-rear direction), and the free end 20 of the window body 13 pivots upward in the vertical direction about the rotary end 19. When the free end 20 of the window body 13 pivots to the fully closed position (see FIG. 6) and the window body 13 is closed, the operation of the ball chain 31 is stopped by a locking mechanism that locks the operation of the ball chain 31 of the high window operator 24.

[0067] When the pivot chain 14 (pivot bar) is wound in the other direction (rearward in the front-rear direction) to pivot the window body 13 from the open state to the fully closed state, the torsion of the first torsion spring 28 returns and the winding torque of the first torsion spring 28 disappears. Also, by stopping the downward operation of the ball chain 31 midway, a reverse prevention mechanism (not shown) operates to stop the pivoting of the free end 19 of the window body 13, and the window body 13 can be maintained in an open state at a predetermined opening degree.

[0068] When the rotary rod 25 rotates in the direction (counterclockwise direction) in which the turning chain 14 (turning strip) is paid out, the first torsion spring 28 is twisted in the winding direction or the direction opposite to the winding direction, and the first torsion spring 28 generates a winding torque (winding spring force) in the direction in which the roller 26 winds up the turning chain 14. When the window body 13 is in the open state, the rotation of the roller 26 is biased in the winding direction of the turning chain 14 by the winding torque of the first torsion spring 28, and the rotational load acting on the rotary rod 25 when the window body 13 is pivoted from the open state to the closed state (the operating load required for closing the window body 13) is reduced by the winding torque. Therefore, the winding of the turning chain 14 around the roller 26 is promoted (facilitated) by the winding torque of the first torsion spring 28, the operating load (operating load) acting when the window body 13 is closed can be reduced, and the opened window body 13 can be easily closed without requiring a large force.

[0069] When the window opening / closing system 10 pivots the window body 13 from the open state to the fully closed state, the winding torque of the first torsion spring 28 disappears. Therefore, the winding torque of the first torsion spring 28 does not act on the rotary rod 25 in the closed state of the window body 13, and the winding torque of the first torsion spring 28 can be maximized when the free end 20 of the window body 13 pivots to the fully open position. Since the window opening / closing system 10 can make full and maximum use of the winding torque of the first torsion spring 28, the operating load (operating load) acting when the window body 13 is closed by the first torsion spring 28 can be surely reduced, and the opened window body 13 can be easily closed without requiring a large force.

[0070] Next, the manner in which the first torsion spring 28 exhibits winding torque and unwinding torque will be described. Note that the configuration of the window opening / closing system 10 is the same as that in FIG. 1. When the window opening / closing system 10 pivots the window body 13 from the open state to the fully closed state, during the pivoting to the closed state (the position where the window body 13 is open from the position where the rotation center and the center of gravity in the vertical direction of the window body 13 coincide), the torsion of the first torsion spring 28 returns, the winding torque of the first torsion spring 28 disappears, and after the winding torque becomes 0, the first torsion spring 28 is set to twist in the winding direction or the direction opposite to the winding direction in the direction opposite to the direction in which the winding torque is exhibited so as to exhibit the unwinding torque. Therefore, in the closed state where the window body 13 has pivoted to the fully closed position, the first torsion spring 28 is twisted in the winding direction or the direction opposite to the winding direction. In the closed state where the window body 13 has pivoted to the fully closed position, the first torsion spring 28 exhibits the unwinding torque in the direction in which the roller 26 feeds out the pivoting chain 14 (pivoting bar).

[0071] In the window opening / closing system 10, in the closed state where the window body 13 has pivoted to the fully closed position, the rotation from the roller 26 is biased in the feeding direction of the pivoting chain 14 by the unwinding torque of the first torsion spring 28, and the feeding of the pivoting chain 14 from the roller 26 is promoted by the unwinding torque of the first torsion spring 28. At the start of pivoting the window body 13 from the fully closed state (closed position) to the open state, the unwinding torque of the first torsion spring 28 acts on the window body 13.

[0072] When the first torsion spring 28 generates a payout torque at the initial movement of rotating the window body 13 from the fully closed state (closed position) to the open state, the torsion of the first torsion spring 28 returns at the time after the initial movement, and the payout torque of the first torsion spring 28 disappears. When the rotary rod 25 rotates in the direction of paying out the turning chain 14 (turning strip) from the time after the initial movement, the first torsion spring 28 is twisted in the winding direction or the direction opposite to the winding direction, and the first torsion spring 28 generates a winding torque in the direction of winding the turning chain 14 by the roller 26, and the rotation of the roller 26 is biased in the winding direction of the turning chain 14 by the winding torque of the first torsion spring 28. The winding of the turning chain 14 around the roller 26 is promoted (facilitated) by the winding torque of the first torsion spring 28, and the rotational load acting on the rotary rod 25 (the operating load acting when the window body 13 is closed) is reduced by the winding torque of the first torsion spring 28 when the window body 13 is rotated from the fully open state (open position) to the closed state.

[0073] To swing the free end 20 of the window body 13 from the fully closed state (closed position) to the open state, one side of the ball chain 31 hanging downward from the sprocket 30 of the high window operator 24 is operated downward. Incidentally, the operation of the ball chain 31 of the high window operator 24 is blocked by a locking mechanism that locks the operation of the ball chain 31 when the window body 13 is in the fully closed state. When operating the ball chain 31 from the fully closed state, the locking mechanism is released. At the start of the initial movement from the fully closed state (closed position) to the open state, together with the kicking force by the kicking means, the free end 20 of the window body 13 starts to smoothly swing downward in the vertical direction by the payout torque of the first torsion spring 28. After passing the initial movement, the free end 20 swings downward in the vertical direction due to the self-weight of the window body 13. As the ball chain 31 operates downward, the sprocket 30 (rotating rod 25 of the rotation mechanism 15) rotates counterclockwise, and the rotating rod 25 rotates counterclockwise. The swing chain 14 is sequentially paid out in one direction (forward in the front-rear direction) from the roller 26, and the free end 20 of the window body 13 swings to the fully open position.

[0074] The window opening and closing system 10 can utilize the payout torque of the first torsion spring 28 at the start of the initial movement to open the window body 13 from the fully closed state together with the kicking force by the kicking means, so that the free end 20 of the window body 13 can be swung downward in the vertical direction without resistance at the start of the initial movement, and the window body 13 can be smoothly swung from the closed state to the open state, and the window body 13 can be easily opened. When the window opening and closing system 10 passes the start of the initial movement to swing the window body 13 from the fully closed state (closed position) to the open state, the first torsion spring 28 generates a winding torque (winding spring force), and the rotational load acting on the rotating rod 25 when swinging the window body 13 from the open state to the closed state is reduced by the winding torque, and the operating load acting when closing the window body 13 can be reduced, and the window body 13 opened without requiring a large force can be easily closed.

[0075] FIG. 11 is a partial enlarged view showing another example of the rotation mechanism 15, and FIG. 12 is an enlarged perspective view of the first and second torsion springs 28 and 34 of the rotation mechanism 15 in FIG. 11. FIG. 13 is an exploded perspective view of the torsional rotation speed first adjustment mechanism 35a. In FIG. 11, the illustration of the window frame 11 and the window body 12 is omitted. In FIGS. 12 and 13, the illustration of the high window operator 24 and the rotation rod 25 (only in FIG. 13) is omitted.

[0076] The rotation mechanism 15 shown in FIG. 11 is formed by a high window operator 24 (chain type operator) (rotating force applying means) and a rotation rod 25, a roller 26, a first ring mounting drum 27a and a second ring mounting drum 27b, a first torsion spring 28 and a second torsion spring 34 (coil spring), and a torsional rotation speed first adjustment mechanism 35a.

[0077] The rotation rod 25, the roller 26, the first and second ring mounting drums 27a and 27b, and the first and second torsion springs 28 and 34 are installed (accommodated) in the accommodation unit 29. The high window operator 24 (chain type operator) is the same as that in FIG. 1. In the window opening and closing system 10 provided with the rotation mechanism 15 in FIG. 11, when the free end 20 of the window body 13 is swung upward in the vertical direction from the fully open state toward the closed position, after the rotation rod 25 rotates by the number of times set by the torsional rotation speed first adjustment mechanism 35a, the torsion of the second torsion spring 34 starts.

[0078] In the window opening / closing system 10 shown in FIG. 11, the rotary rod 25 is rotatably accommodated in the accommodation unit 29 (rotatably installed on the window frame 12) and extends in the lateral direction (see FIG. 2). One end and the middle part of the rotary rod 25 are rotatably supported by the bearing plate 32 of the accommodation unit 29, and the sprocket 30 of the operator 24 for the high window is attached to the other end thereof. A rotational force is applied to the rotary rod 25 by the operator 24 for the high window (rotational force applying means), and the rotary rod 25 rotates in the clockwise direction (positive direction) (the clockwise direction when viewing the rotary rod 25 (sprocket 30) from the side of the second torsion spring 34 (right side in FIG. 12), the same as the clockwise direction in the arrow direction of FIG. 13, the clockwise direction when viewing the sprocket 30 from the other end side of the rotary rod 25) or the counterclockwise direction (reverse direction). The roller 26 is accommodated in the accommodation unit 29 and is installed (fitted) between one end and the middle part of the rotary rod 25. As the rotary rod 25 rotates, the roller 26 rotates in the clockwise direction (positive direction) or the counterclockwise direction (reverse direction). The other end of the swivel chain 14 is connected and fixed to the roller 26.

[0079] The first ring attachment drum 27a is accommodated in the accommodation unit 29 and is installed on the side of the middle part of the rotary rod 25 (laterally outward of the roller 26). The first ring attachment drum 27a rotates in the clockwise direction (positive direction) or the counterclockwise direction (reverse direction) in conjunction with the rotary rod 25. The second ring attachment drum 27b is accommodated in the accommodation unit 29 and is installed on the side of one end of the rotary rod 25 (laterally outward of the roller 26). The second ring attachment drum 27b does not rotate in conjunction with the rotary rod 25 and rotates independently in the clockwise direction (positive direction) or the counterclockwise direction (reverse direction).

[0080] The first torsion spring 28 is attached to the first ring attachment drum 27a and extends in the axial direction of the rotary rod 25. The first torsion spring 28 has its fixed point of the arm connected and fixed to either each support plate 40 or the bearing plate 32 of the accommodation unit 29 with the first ring attachment drum 27a inserted therethrough, and the load point of the arm is connected and fixed to the outer peripheral edge of the rotary rod 25.

[0081] When the rotary rod 25 rotates counterclockwise and the swivel chain 14 (swivel strip) is fed out from the roller 26 in one direction (forward in the front-rear direction), the first torsion spring 28 rotates counterclockwise together with the first ring attachment drum 27a, twists in the winding direction, or twists in the direction opposite to the winding direction. Conversely, when the swivel chain 14 is wound onto the roller 26 in the other direction (backward in the front-rear direction), the first torsion spring 28 rotates clockwise together with the first ring attachment drum 27a and the twist returns.

[0082] The second torsion spring 34 is located on the opposite side of the first ring attachment drum 28 across the roller 26, is attached to the second ring attachment drum 27b, and extends in the axial direction of the rotary rod 25. The second torsion spring 34 has the load point of its arm connected and fixed to the second rotation transmission plate 38 of the torsion rotation speed first adjustment mechanism 35a described later with the second ring attachment drum 27b inserted therethrough, and the fixed point of the arm is connected and fixed to the support plate 40 of the accommodation unit 29. Incidentally, the fixed point may be connected and fixed to the bearing plate 32.

[0083] When the swivel chain 14 is wound onto the roller 26 in the other direction (backward in the front-rear direction), the second torsion spring 34 rotates clockwise together with the second rotation transmission plate 38, twists in the winding direction, or twists in the direction opposite to the winding direction. Conversely, when the swivel chain 14 (swivel strip) is fed out from the roller 26 in one direction (forward in the front-rear direction), the second torsion spring 34 rotates counterclockwise together with the second rotation transmission plate 38 and the twist returns.

[0084] When the first torsion spring 28 and the second torsion spring 34 are twisted in the direction opposite to the winding direction, they generate torque (repulsive force) in the opposite direction (winding direction) proportional to the angle of twist. When twisted in the winding direction, they generate torque (repulsive force) in the opposite direction (opposite to the winding direction) proportional to the angle of twist. The torque (outer diameter, inner diameter, number of turns, spring rate) of the first torsion spring 28 is adjusted so that the load acting on the sprocket 30 (ball chain 31) when the free end 20 of the window body 13 is pivoted upward in the vertical direction from the fully open position (open position) toward the closed position is about 1.5 to 2 kgf. The torque (outer diameter, inner diameter, number of turns, spring rate) of the second torsion spring 34 acts at the initial stage when the window body 13 is pivoted from the fully closed position to the open position, and is adjusted to urge the rotation of the roller 26 in the payout direction of the pivot chain 14.

[0085] The first torsional rotation speed adjustment mechanism 35a is formed by a first rotation transmission plate 36, first to fourth rotation plates 37a to 37d (first to nth rotation plates) arranged side by side adjacent to the first rotation transmission plate 36 in the axial direction, and a second rotation transmission plate 38 arranged adjacent to the fourth rotation plate 37d in the axial direction. The first rotation transmission plate 36, the first to fourth rotation plates 37a to 37d, and the second rotation transmission plate 38 are made of a metal such as aluminum alloy or stainless steel or a synthetic resin, and are formed into a substantially disk shape with substantially the same shape and size. The first to fourth rotation plates 37a to 37d are arranged in the order of the first rotation transmission plate 36 → the first to fourth rotation plates 37a to 37d → the second rotation transmission plate 38 from the bearing plate 32 on the side of the second torsion spring 34 toward the second torsion spring 34. Incidentally, the first torsional rotation speed adjustment mechanism 35a may be formed by the first rotation transmission plate 36 and the second rotation transmission plate 38. In this case, the second rotation transmission plate 38 is arranged adjacent to the first rotation transmission plate 36 in the axial direction.

[0086] At the centers of the first rotation transmission plate 36, the first to fourth rotation plates 37a to 37d, and the second rotation transmission plate 38, central openings 39 that penetrate these rotation transmission plates 36, 38 and these rotation plates 37a to 37d in the thickness direction are drilled. The first rotation transmission plate 36 is positioned adjacent to the bearing plate 32 in the axial direction, and the rotation rod 25 is inserted through its central opening 39. The first rotation transmission plate 36 rotates in the clockwise or counterclockwise direction in conjunction with the rotation of the rotation rod 25 (roller 26). The first rotation transmission plate 36 is provided with a convex portion 41a (rotation transmission means for transmitting the rotation of the first rotation transmission plate 36) that extends radially outward from its outer peripheral edge.

[0087] The first rotation plate 37a is positioned adjacent to the first rotation transmission plate 36 in the axial direction (immediately behind), is disposed between the first rotation transmission plate 36 and the second torsion spring 34 (second rotation plate 37b), and the rotation rod 25 is inserted through its central opening 39. The first rotation plate 37a rotates clockwise or counterclockwise by itself, or rotates clockwise or counterclockwise together with the first rotation transmission plate 36. The first rotation plate 37a is provided with a convex portion 41b (rotation passive means for receiving the rotation of the first rotation transmission plate 36) that extends axially toward the convex portion 41a of the first rotation transmission plate 36 after extending radially outward from its outer peripheral edge.

[0088] The second rotation plate 37b is positioned adjacent to the first rotation plate 37a in the axial direction (immediately behind), is disposed between the first rotation plate 37a and the second torsion spring 34 (third rotation plate 37c), and the rotation rod 25 is inserted through its central opening 39. The second rotation plate 37b rotates clockwise or counterclockwise by itself, or rotates clockwise or counterclockwise together with the first rotation transmission plate 36 and the first rotation plate 37a. The second rotation plate 37b is provided with a convex portion 41c (rotation passive means for receiving the rotation of the first rotation transmission plate 36 (first rotation plate 37a)) that extends axially toward the convex portion 41b of the first rotation plate 37a after extending radially outward from its outer peripheral edge.

[0089] The third rotating plate 37c is positioned adjacent to (immediately after) the second rotating plate 37b in the axial direction, and is disposed between the second rotating plate 37b and the second torsion spring 34 (the fourth rotating plate 37d). The rotating rod 25 is inserted through its central opening 39. The third rotating plate 37c rotates clockwise or counterclockwise alone, or rotates clockwise or counterclockwise together with the first rotation transmission plate 36, the first rotating plate 37a, and the second rotating plate 37b. The third rotating plate 37c has a convex portion 41d (a rotation receiving means for receiving the rotation of the first rotation transmission plate 36 (the second rotating plate 37b)) that extends radially outward from its outer peripheral edge and then extends axially toward the convex portion 41c of the second rotating plate 37b.

[0090] The fourth rotating plate 37d is positioned adjacent to (immediately after) the third rotating plate 37c in the axial direction, and is disposed between the third rotating plate 37c and the second torsion spring 34 (the second rotation transmission plate 38). The rotating rod 25 is inserted through its central opening 39. The fourth rotating plate 37d rotates clockwise or counterclockwise alone, or rotates clockwise or counterclockwise together with the first rotation transmission plate 36 and the first to third rotating plates 37a - 37c. The fourth rotating plate 37d has a convex portion 41e (a rotation receiving means for receiving the rotation of the first rotation transmission plate 36 (the third rotating plate 37c)) that extends radially outward from its outer peripheral edge and then extends axially toward the convex portion 41d of the third rotating plate 37c.

[0091] The second rotation transmission plate 38 is positioned adjacent to (immediately after) the fourth rotation plate 37d (the nth rotation plate) in the axial direction, is disposed between the fourth rotation plate 37d and the second torsion spring 34, and is installed and fixed to one end of the second torsion spring 34. The second rotation transmission plate 38 rotates in the clockwise direction or the counterclockwise direction together with the second torsion spring 34, or rotates in the clockwise direction or the counterclockwise direction together with the first rotation transmission plate 36, the first to fourth rotation plates 37a - 37d, and the second torsion spring 34. The second rotation transmission plate 38 is provided with a convex portion 41f (a rotation receiving means for receiving the rotation of the first rotation transmission plate 36 (the fourth rotation plate 37d)) that extends axially toward the convex portion 41e of the fourth rotation plate 37d after extending radially outward from its outer peripheral edge. In FIGS. 12 and 13, four first to fourth rotation plates 37a - 37d (the first to nth rotation plates) are illustrated, but the number of rotation plates (the number of the first to nth rotation plates of the torsional rotation number first adjustment mechanism) is determined according to the number of turns of the turning chain 14 (turning strip) around the roller 26 (for example, adjustable within the range of 3 to 7).

[0092] When the free end 20 of the window body 13 rotates to the open position where it is fully opened and the window body 13 is in the fully opened state, as shown in FIG. 12, the convex portion 41a of the first rotation transmission plate 36 extends vertically upward (radially outward) in the vertical direction, and the convex portion 41b of the first rotation plate 37a is adjacent to the convex portion 41a of the first rotation transmission plate 36 in the counterclockwise direction and extends radially outward. At the same time, one end face 42a in the clockwise direction of the convex portion 41b of the first rotation plate 37a abuts against the other end face 43b in the counterclockwise direction of the convex portion 41a of the first rotation transmission plate 36.

[0093] The convex portion 41c of the second rotating plate 37b is adjacent to the convex portion 41b of the first rotating plate 37a in the counterclockwise direction and extends radially outward. One end face 44a in the clockwise direction of the convex portion 41c of the second rotating plate 37b abuts against the other end face 42b in the counterclockwise direction of the convex portion 41b of the first rotating plate 37a. The convex portion 41d of the third rotating plate 37c is adjacent to the convex portion 41c of the second rotating plate 37b in the counterclockwise direction and extends radially outward. One end face 45a in the clockwise direction of the convex portion 41d of the third rotating plate 37c abuts against the other end face 44b in the counterclockwise direction of the convex portion 41c of the second rotating plate 37b.

[0094] The convex portion 41e of the fourth rotating plate 37d is adjacent to the convex portion 41d of the third rotating plate 37c in the counterclockwise direction and extends radially outward. One end face 46a in the clockwise direction of the convex portion 41e of the fourth rotating plate 37d abuts against the other end face 45b in the counterclockwise direction of the convex portion 41d of the third rotating plate 37c. Further, the convex portion 41f of the second rotation transmission plate 38 is located at a predetermined distance from the convex portion 41e of the fourth rotating plate 37d in the clockwise or counterclockwise direction. As another aspect, the convex portion 41f of the second rotation transmission plate 38 is adjacent to the convex portion 41e of the fourth rotating plate 37d in the counterclockwise direction and extends radially outward. One end face 47a in the clockwise direction of the convex portion 41f of the second rotation transmission plate 38 abuts against the other end face 46b in the counterclockwise direction of the convex portion 41e of the fourth rotating plate 37d.

[0095] In the window opening / closing system 10 provided with the rotating mechanism 15 of FIG. 11, when the window body 13 is fully opened, similar to the window opening / closing system 10 of FIG. 1, the first torsion spring 28 is twisted in the winding direction or the direction opposite to the winding direction, and the first torsion spring 28 develops a winding torque (winding spring force) in the direction in which the roller 26 winds up the turning chain 14 (turning strip). The rotation of the roller 26 is biased in the winding direction of the turning chain 14 (turning strip) by the winding torque of the first torsion spring 28, and the rotational load acting on the rotary rod 25 when the free end 20 of the window body 13 is rotated from the fully opened state (open position) to the closed state (closed position) (the operating load acting when the window body 13 is closed) is reduced by the winding torque of the first torsion spring 28. Note that the second torsion spring 34 is not twisted in the winding direction or the direction opposite to the winding direction and does not develop torque.

[0096] FIG. 14 is a partially enlarged perspective view for explaining the operation of the torsional rotation speed first adjustment mechanism 35a, and FIG. 15 is a partially enlarged perspective view for explaining the operation of the torsional rotation speed first adjustment mechanism 35a following FIG. 14. FIG. 16 is a partially enlarged perspective view for explaining the operation of the torsional rotation speed first adjustment mechanism 35a following FIG. 15, and FIG. 17 is a partially enlarged perspective view for explaining the operation of the torsional rotation speed first adjustment mechanism 35a following FIG. 16.

[0097] To close the window body 13 by pivoting the free end 20 of the window body 13 upward in the vertical direction from the open state where the free end 20 is pivoted to the fully opened open position, the other side of the ball chain 31 is actuated downward, the sprocket 30 is rotated in the clockwise direction, and the rotary rod 25 is rotated in the clockwise direction. When the rotary rod 25 is rotated in the clockwise direction by the downward actuation of the ball chain 31, the turning chain 14 is wound around the roller 26 in the other direction (backward in the front-rear direction), and the free end 20 of the window body 13 pivots upward in the vertical direction about the rotary end 19. When the window body 13 pivots to the fully closed closed position and the window body 13 is closed, the actuation of the ball chain 31 stops.

[0098] In the closing operation of the window body 13, in the first torsion rotation speed adjustment mechanism 35a, when the free end 20 of the window body 13 pivots from the fully open position to the closed position and the rotary rod 25 rotates in the clockwise direction (the direction of winding up the pivot chain 14), as indicated by the arrow in Fig. 14, the first rotation transmission plate 36 rotates in the clockwise direction together with the roller 26 (rotary rod 25). When the first rotation transmission plate 36 rotates approximately one turn (less than one turn) in the clockwise direction, as shown in Fig. 14, one end face 43a in the clockwise direction of the convex portion 41a of the first rotation transmission plate 36 abuts against the other end face 42b in the counterclockwise direction of the convex portion 41b of the first rotation plate 37a.

[0099] After the convex portion 41a of the first rotation transmission plate 36 abuts against the convex portion 41b of the first rotation plate 37a, when the rotary rod 25 further rotates in the clockwise direction, the rotation of the first rotation transmission plate 36 is transmitted from the convex portion 41a (rotation transmission means) to the first rotation plate 37a via the convex portion 41b (rotation passive means). As indicated by the arrow in Fig. 15, with the convex portions 41a and 41b in contact, the first rotation transmission plate 36 and the first rotation plate 37a rotate together in the clockwise direction together with the roller 26 (rotary rod 25). When the first rotation transmission plate 36 and the first rotation plate 37a rotate approximately one turn (less than one turn) in the clockwise direction, as shown in Fig. 15, one end face 42a in the clockwise direction of the convex portion 41b of the first rotation plate 37a abuts against the other end face 44b in the counterclockwise direction of the convex portion 41c of the second rotation plate 37b.

[0100] After the convex portion 41b of the first rotating plate 37a abuts against the convex portion 41c of the second rotating plate 37b, when the rotating rod 25 further rotates in the clockwise direction, the rotation of the first rotating plate 37a is transmitted from the convex portion 41b (rotation passive means) to the second rotating plate 37b via the convex portion 41c (rotation passive means). As shown by the arrow in Fig. 16, with the convex portions 41a - 41c in contact with each other, the first rotation transmission plate 36, the first and second rotating plates 37a, 37b, together with the roller 26 (rotating rod 25), rotate together in the clockwise direction. When the first rotation transmission plate 36, the first and second rotating plates 37a, 37b rotate approximately one full turn (less than one full turn) in the clockwise direction, as shown in Fig. 16, one end face 44a in the clockwise direction of the convex portion 41c of the second rotating plate 37b abuts against the other end face 45b in the counterclockwise direction of the convex portion 41d of the third rotating plate 37c.

[0101] After the convex portion 41c of the second rotating plate 37b abuts against the convex portion 41d of the third rotating plate 37c, when the rotating rod 25 further rotates in the clockwise direction, the rotation of the second rotating plate 37b is transmitted from the convex portion 41c (rotation passive means) to the third rotating plate 37c via the convex portion 41d (rotation passive means). With the convex portions 41a - 41d in contact with each other, the first rotation transmission plate 36, the first to third rotating plates 37a - 37c, together with the roller 26 (rotating rod 25), rotate together in the clockwise direction. When the first rotation transmission plate 36, the first to third rotating plates 37a - 37c rotate approximately one full turn (less than one full turn) in the clockwise direction, one end face 45a in the clockwise direction of the convex portion 41d of the third rotating plate 37c abuts against the other end face 46b in the counterclockwise direction of the convex portion 41e of the fourth rotating plate 37d.

[0102] After the convex portion 41d of the third rotating plate 37c abuts against the convex portion 41e of the fourth rotating plate 37d, when the rotating rod 25 further rotates in the clockwise direction, the rotation of the third rotating plate 37c is transmitted from the convex portion 41d (rotation passive means) to the fourth rotating plate 37d via the convex portion 41e (rotation passive means). As shown by the arrow in Fig. 17, with the convex portions 41a - 41e in contact with each other, the first rotation transmission plate 36, the first to fourth rotating plates 37a - 37d, and the roller 26 (rotating rod 25) rotate together in the clockwise direction. When the first rotation transmission plate 36 and the first to fourth rotating plates 37a - 37d rotate a predetermined amount (less than one rotation) in the clockwise direction, as shown in Fig. 17, one end face 46a in the clockwise direction of the convex portion 41e of the fourth rotating plate 37d abuts against the other end face 47b in the counterclockwise direction of the convex portion 41f of the second rotation transmission plate 38.

[0103] After the convex portion 41e of the fourth rotating plate 37d abuts against the convex portion 41f of the second rotation transmission plate 38, when the rotating rod 25 further rotates in the clockwise direction, the rotation of the fourth rotating plate 37d is transmitted from the convex portion 41e (rotation passive means) to the second rotation transmission plate 38 via the convex portion 41f (rotation passive means). With the convex portions 41a - 41f in contact with each other, the first rotation transmission plate 36, the first to fourth rotating plates 37a - 37d, and the second rotation transmission plate 38 rotate together in the clockwise direction with the roller 26 (rotating rod 25). When the first rotation transmission plate 36, the first to fourth rotating plates 37a - 37d, and the second rotation transmission plate 38 rotate in the clockwise direction, the second torsion spring 34 twists in the winding direction or the direction opposite to the winding direction in conjunction with the rotation of the second rotation transmission plate 38.

[0104] In this way, in the torsional rotation speed first adjustment mechanism 35a, while the convex portions 41b to 41e of the first to fourth rotation plates 37a to 37d (the first to nth rotation plates) are sequentially brought into contact with each other from the first rotation plate 37a toward the fourth rotation plate 37d (the nth rotation plate), after the rotation of the rotation rod 25 is sequentially transmitted from the first rotation transmission plate 36 toward the fourth rotation plate 37d (the nth rotation plate), the convex portion 41e of the fourth rotation plate 37d (the nth rotation plate) comes into contact with the convex portion 41f of the second rotation transmission plate 38, and the first rotation transmission plate 36, the first to fourth rotation plates 37a to 37d (the first to nth rotation plates), and the second rotation transmission plate 38 rotate together, so that the rotation of the rotation rod 25 is transmitted to the second torsion spring 34, and the torsion of the second torsion spring 34 starts. When the free end portion 20 of the window body 13 rotates to the fully closed position and the window body 13 is fully closed, the second torsion spring 34 is in a twisted state (maximum twisted state).

[0105] In the window opening and closing system 10, the rotation rod 25 rotates in the winding direction (clockwise direction) of the pivot chain 14 (pivot bar), and the free end portion 20 of the window body 13 is pivoted from the fully open state (open position) toward the closed position. After the rotation rod 25 rotates a predetermined number of times, the torsion of the second torsion spring 34 starts by the torsional rotation speed first adjustment mechanism 35a, and the second torsion spring 34 is twisted in the winding direction or the direction opposite to the winding direction.

[0106] When the free end portion 20 of the window body 13 is at the closed position pivoted to the fully closed state, the second torsion spring 34 generates a feeding torque in the feeding direction (forward in the front-rear direction) of the pivot chain 14 by the roller 26. By the feeding torque of the second torsion spring 34, the rotation of the roller 26 (rotation rod 25) is biased in the feeding direction of the pivot chain 14, and when the free end portion 20 of the window body 13 is pivoted from the fully closed state (closed position) to the open state (open position) at the start of movement, the feeding torque of the second torsion spring 34 acts on the free end portion 20 of the window body, and the free end portion of the window body smoothly pivots downward in the vertical direction without resistance at the start of movement.

[0107] In the torsional rotation speed first adjustment mechanism 35a, after the rotary rod 25 rotates a predetermined number of times, the rotation of the rotary rod 25 is transmitted to the second torsion spring 34, and the torsion of the second torsion spring 34 starts. However, by increasing the number of the rotary plates 37a to 37d, it is also possible to make the torsion of the second torsion spring 34 start after the rotary rod 25 rotates more. Also, by decreasing the number of the rotary plates 37a to 37d, it is possible to make the torsion of the second torsion spring 34 start after the rotary rod 25 rotates less. When the number of the rotary plates 37a to 37d is increased, the start of the torsion of the second torsion spring 34 is delayed, and the payout torque of the second torsion spring 34 decreases. Conversely, when the number of the rotary plates 37a to 37d is decreased, the start of the torsion of the second torsion spring 34 is advanced, and the payout torque of the second torsion spring 34 increases.

[0108] When the free end 20 of the window body 13 pivots from the fully closed state (closed position) to the open state (open position), the second torsion spring 34 rotates counterclockwise and the torsion is unwound, and the second rotation transmission plate 38 rotates counterclockwise together with the second torsion spring 34. Until the torsion of the second torsion spring 34 is completely unwound (the torsion becomes 0), the second rotation transmission plate 38, the first to fourth rotation plates 37a to 37d (the first to nth rotation plates), and the first rotation transmission plate 36 rotate together counterclockwise, and the rotary rod 25 rotates counterclockwise as these plates 36, 37a to 37d, 38 rotate.

[0109] After the torsion of the second torsion spring 34 is unwound, the first rotation transmission plate 36 rotates counterclockwise in conjunction with the rotation of the rotation rod 25 (roller 26). When the first rotation transmission plate 36 rotates counterclockwise by approximately one rotation (less than one full rotation), the other end face 43b of the convex portion 41a of the first rotation transmission plate 36 abuts against one end face 42a of the convex portion 41b of the first rotation plate 37a. After the convex portion 41a of the first rotation transmission plate 36 abuts against the convex portion 41b of the first rotation plate 37a, the first rotation transmission plate 36 and the first rotation plate 37a rotate together counterclockwise.

[0110] When the first rotation transmission plate 36 and the first rotation plate 37a rotate counterclockwise by approximately one rotation (less than one full rotation), the other end face 42b of the convex portion 41b of the first rotation plate 37a abuts against one end face 44a of the convex portion 41c of the second rotation plate 37b. After the convex portion 41b of the first rotation plate 37a abuts against the convex portion 41c of the second rotation plate 37b, the first rotation transmission plate 36 and the first and second rotation plates 37a, 37b rotate together counterclockwise.

[0111] When the first rotation transmission plate 36 and the first and second rotation plates 37a, 37b rotate counterclockwise by approximately one rotation (less than one full rotation), the other end face 44b of the convex portion 41c of the second rotation plate 37b abuts against one end face 45a of the convex portion 41d of the third rotation plate 37c. After the convex portion 41c of the second rotation plate 37b abuts against the convex portion 41d of the third rotation plate 37c, the first rotation transmission plate 36 and the first to third rotation plates 37a to 37c rotate together counterclockwise.

[0112] When the first rotation transmission plate 36 and the first to third rotation plates 37a to 37c rotate counterclockwise by approximately one rotation (less than one full rotation), the other end face 45b of the convex portion 41d of the third rotation plate 37c abuts against one end face 46a of the convex portion 41e of the fourth rotation plate 37d. After the convex portion 41d of the third rotation plate 37c abuts against the convex portion 41e of the fourth rotation plate 37d, the first rotation transmission plate 36 and the first to fourth rotation plates 37a to 37d rotate together counterclockwise.

[0113] The first rotation transmission plate 36 and the first to fourth rotation plates 37a to 37d rotate counterclockwise, and before the other end face 46b of the convex portion 41e of the fourth rotation plate 37d contacts the one end face 47a of the convex portion 41f of the second rotation transmission plate 38, the free end portion 20 of the window body 13 rotates to the fully open position, and the first rotation transmission plate 36 of the first torsional rotation speed adjustment mechanism 35a, the first to fourth rotation plates 37a to 37d (the first to nth rotation plates), and the second rotation transmission plate 38 return to the state of FIG. 12.

[0114] When the window opening and closing system 10 starts to operate (at the start of rotation) to rotate the free end portion 20 of the window body 13 from the fully closed position to the open state, the payout torque of the second torsion spring 34 promotes the downward rotation of the free end portion 20 of the window body 13 in the vertical direction, and at the start of operation, the free end portion 20 of the window body 13 can be easily rotated from the closed position to the open position, and the free end portion 20 of the window body 13 can be smoothly rotated from the closed position to the open position, and the window body 13 can be quickly opened from the closed state to the open state.

[0115] By using the first rotation transmission plate 36, the first to fourth rotation plates 37a to 37d (the first to nth rotation plates), and the second rotation transmission plate 38 of the first torsional rotation speed adjustment mechanism 35a, the window opening and closing system 10 can twist the second torsion spring 34 after the rotary rod 25 rotates a set number of times, can adjust the strength of the payout torque of the second torsion spring 34, and can freely adjust the kicking force of the free end portion 20 of the window body 13 at the start of operation.

[0116] The window opening / closing system 10 can increase the payout torque of the second torsion spring 34 by reducing the number of the first to fourth rotating plates 37a to 37d (the first to nth rotating plates), thereby increasing the kicking force of the free end 20 of the window body 13 at the start of movement. By increasing the number of the first to fourth rotating plates 37a to 37d (the first to nth rotating plates), the payout torque of the second torsion spring 34 can be weakened, and the kicking force of the free end 20 of the window body 13 at the start of movement can be weakened. By adjusting the number of the first to fourth rotating plates 37a to 37d (the first to nth rotating plates), the payout torque of the second torsion spring 34 can be increased or decreased, and the kicking force of the free end 20 of the window body 13 at the start of movement can be freely adjusted.

[0117] By adjusting the number of the first to fourth rotating plates 37a to 37d (the first to nth rotating plates) of the window opening / closing system 10 (for example, adjusting within the range of 3 to 7 plates), the payout torque of the second torsion spring 34 and the kicking force of the free end 20 of the window body 13 can be optimally adjusted according to the characteristics of the window body 13 such as size, weight, and shape. The free end 20 of the window body 13 can be smoothly rotated from the closed state (closed position) to the open state, and the window body 13 can be quickly opened from the closed state to the open state.

[0118] If the payout torque of the second torsion spring 34 of the window opening / closing system 10 is too strong, when the free end 20 of the window body 13 is rotated to the fully closed position, the free end 20 cannot be smoothly rotated to the fully closed position by the payout torque of the second torsion spring 34, and the closing of the window body 13 may be incomplete. However, by adjusting the strength of the payout torque of the second torsion spring 34 by the torsional rotation number first adjustment mechanism 35a and adjusting the kicking force of the free end 20 of the window body 13 at the start of movement, the free end 20 of the window body 13 can be smoothly rotated to the fully closed position, and incomplete closing of the window body 13 can be prevented.

[0119] FIG. 18 is a partially enlarged perspective view showing another example of the rotating mechanism 15, and FIG. 19 is an exploded perspective view of the second torsional rotation speed adjusting mechanism 35b. In FIGS. 18 and 19, the illustration of the operator 24 for high windows is omitted. The rotating mechanism 25 shown in FIG. 18 is formed by a rotating rod 25 and an operator 24 for high windows (rotating force applying means) (not shown), a roller 26 and a ring mounting drum 27, a first torsion spring 28, and a second torsional rotation speed adjusting mechanism 35b.

[0120] The rotating rod 25, the roller 26, the ring mounting drum 27, and the first torsion spring 28 are installed (accommodated) in the accommodating unit 29. The operator 24 for high windows (chain type operator) is the same as that in FIG. 1. In the window opening / closing system 10 provided with the rotating mechanism 15 of FIG. 18, when the free end 20 of the window body 13 is pivoted downward in the vertical direction from the fully closed state (closed position) toward the open position, after the rotating rod 25 rotates by the number of times set by the second torsional rotation speed adjusting mechanism 35, the torsion of the first torsion spring 28 starts.

[0121] In the window opening / closing system 10 using the rotating mechanism 15 of FIG. 18, the rotating rod 25 is rotatably accommodated in the accommodating unit 29 (rotatably installed on the window frame 12) and extends horizontally (see FIG. 2). One end and the middle part of the rotating rod 25 are rotatably supported by the bearing plate 32 of the accommodating unit 29, and the sprocket 30 of the operator 24 for high windows is attached to the other end. A rotating force is applied to the rotating rod 25 by the operator 24 for high windows (rotating force applying means), and the rotating rod 25 rotates in the clockwise direction (positive direction) or the counterclockwise direction (reverse direction). The roller 26 is accommodated in the accommodating unit 29 and is installed (fitted) at one end of the rotating rod 25. As the rotating rod 25 rotates, the roller 26 rotates in the clockwise direction (positive direction) or the counterclockwise direction (reverse direction). The other end of the pivoting chain 14 is connected and fixed to the roller 26.

[0122] The ring mounting drum 27 is housed in the housing unit 29 and is installed on the side of the middle part of the rotating rod 25 (laterally outward of the roller 26). The ring mounting drum 27 does not rotate in conjunction with the rotating rod 25 and rotates independently in the clockwise direction (positive direction) or the counterclockwise direction (reverse direction). The first torsion spring 28 is attached to the ring mounting drum 27 and extends in the axial direction of the rotating rod 25.

[0123] The first torsion spring 28 is the same as that of the window opening and closing system 10 in FIG. 1. With the ring mounting drum 27 inserted, the load point of the arm of the first torsion spring 28 is connected and fixed to the second rotation transmission plate 50 of the second rotation number adjustment mechanism 35b, and the fixed point of the arm is connected and fixed to the support plate 40 of the housing unit 29. Incidentally, the fixed point may be connected and fixed to the bearing plate 32. When the turning chain 14 (turning strip) is fed out from the roller 26 in one direction (forward in the front-rear direction), the first torsion spring 28 rotates counterclockwise together with the second rotation transmission plate 50, twists in the winding direction, or twists in the direction opposite to the winding direction. Conversely, when the turning chain 14 is wound around the roller in the other direction (rearward in the front-rear direction), it rotates clockwise together with the second rotation transmission plate 50 and the twist returns.

[0124] The torsional rotation speed second adjustment mechanism 35b is formed by a first rotation transmission plate 48, first and second rotation plates 49a and 49b (first to nth rotation plates) arranged side by side so as to be adjacent to the first rotation transmission plate 48 in the axial direction (front in the axial direction), and a second rotation transmission plate 50 arranged adjacent to the second rotation plate 49b in the axial direction (front in the axial direction). The first rotation transmission plate 48, the first and second rotation plates 49a and 49b, and the second rotation transmission plate 50 are made of a metal such as an aluminum alloy or stainless steel or a synthetic resin, and are formed into a substantially disk shape with substantially the same shape and size. The first and second rotation transmission plates 48 and 50 and the first and second rotation plates 49a and 49b are arranged in the order of the first rotation transmission plate 48 → the first and second rotation plates 49a and 49b → the second rotation transmission plate 50 from the bearing plate 32 on the roller 26 side toward the first torsion spring 28. Incidentally, the torsional rotation speed second adjustment mechanism 35b may be formed by the first rotation transmission plate 48 and the second rotation transmission plate 50. In this case, the second rotation transmission plate 50 is arranged adjacent to the first rotation transmission plate 48 in the axial direction.

[0125] In the centers of the first rotation transmission plate 48, the first and second rotation plates 49a and 49b, and the second rotation transmission plate 50, a central opening 51 that penetrates these rotation transmission plates 48 and 50 and these rotation plates 49a and 49b in the thickness direction is drilled. The first rotation transmission plate 48 is positioned adjacent to the bearing plate 32 in the axial direction, and the rotation rod 25 is inserted through the central opening 51 thereof. The first rotation transmission plate 48 rotates in the clockwise direction or the counterclockwise direction in conjunction with the rotation of the rotation rod 25 (roller 26). The first rotation transmission plate 48 is provided with a convex portion 52a (rotation transmission means for transmitting the rotation of the first rotation transmission plate 48) extending radially outward from its outer peripheral edge.

[0126] The first rotating plate 49a is positioned adjacent to (immediately after) the first rotation transmission plate 48 in the axial direction, and is disposed between the first rotation transmission plate 48 and the first torsion spring 28 (the second rotating plate 49b), and the rotation rod 25 is inserted through its central opening 51. The first rotating plate 49a rotates clockwise or counterclockwise alone, or rotates clockwise or counterclockwise together with the first rotation transmission plate 48. The first rotating plate 49a has a convex portion 52b (a rotation receiving means for receiving the rotation of the first rotation transmission plate 48) that extends axially toward the convex portion 52a of the first rotation transmission plate 48 after extending radially outward from its outer peripheral edge.

[0127] The second rotating plate 49b is positioned adjacent to (immediately after) the first rotating plate 49a in the axial direction, and is disposed between the first rotating plate 49a and the first torsion spring 28 (the second rotation transmission plate 50), and the rotation rod 25 is inserted through its central opening 51. The second rotating plate 49b rotates clockwise or counterclockwise alone, or rotates clockwise or counterclockwise together with the first rotation transmission plate 48 and the first rotating plate 49a. The second rotating plate 49b has a convex portion 52c (a rotation receiving means for receiving the rotation of the first rotation transmission plate 48 (the first rotating plate 49a)) that extends axially toward the convex portion 52b of the first rotating plate 49a after extending radially outward from its outer peripheral edge.

[0128] The second rotation transmission plate 50 is positioned adjacent to (immediately after) the second rotation plate 49b (the nth rotation plate) in the axial direction, is disposed between the second rotation plate 49b and the first torsion spring 28, and is installed and fixed to one end of the first torsion spring 28. The second rotation transmission plate 50 rotates in the clockwise direction or the counterclockwise direction together with the first torsion spring 28, or rotates in the clockwise direction or the counterclockwise direction together with the first rotation transmission plate 48, the first and second rotation plates 49a, 49b, and the first torsion spring 28. The second rotation transmission plate 50 is provided with a convex portion 52d (rotation receiving means for receiving the rotation of the first rotation transmission plate 48 (the second rotation plate 49b)) that extends axially toward the convex portion 52c of the second rotation plate 49b after extending radially outward from its outer peripheral edge. In FIGS. 18 and 19, two first and second rotation plates 49a, 49b (the first to nth rotation plates) are shown, but the number of rotation plates (the number of the first to nth rotation plates of the torsional rotation number first adjustment mechanism) is determined according to the number of turns of the turning chain 14 (turning strip) around the roller 26 (for example, adjustable within the range of 1 to 5).

[0129] When the free end 20 of the window body 13 rotates to the closed position where it is fully closed and the window body 13 is fully closed, as shown in FIG. 18, the convex portion 52a of the first rotation transmission plate 48 extends laterally (radially outward), and the convex portion 52b of the first rotation plate 49a is adjacent to the convex portion 52a of the first rotation transmission plate 48 in the clockwise direction and extends radially outward. At the same time, the other end face 54b of the convex portion 52b of the first rotation plate 49a in the counterclockwise direction abuts against the one end face 53a of the convex portion 52a of the first rotation transmission plate 48 in the clockwise direction.

[0130] The convex portion 52c of the second rotating plate 49b is adjacent to the convex portion 52b of the first rotating plate 49a in the clockwise direction and extends radially outward. At the same time, the other end face 55b of the convex portion 52c of the second rotating plate 49b in the counterclockwise direction abuts against one end face 54a of the convex portion 52b of the first rotating plate 49a in the clockwise direction. The convex portion 41f of the second rotation transmission plate 38 is located at a predetermined distance from the convex portion 41e of the fourth rotating plate 37d in the clockwise or counterclockwise direction.

[0131] In the window opening and closing system 10 provided with the rotation mechanism 15 of FIG. 18, when the window body 13 is fully opened, similar to the window opening and closing system 10 of FIG. 1, the first torsion spring 28 is twisted in the winding direction or the direction opposite to the winding direction, and the first torsion spring 28 generates a winding torque (winding spring force) in the direction in which the roller 26 winds the turning chain 14 (turning strip). The rotation of the roller 26 is biased in the winding direction of the turning chain 14 by the winding torque of the first torsion spring 28, and the rotational load acting on the rotary rod 25 when the free end 20 of the window body 13 is pivoted from the fully opened state (open position) to the closed state (closed position) (the operating load acting when the window body 13 is closed) is reduced by the winding torque of the first torsion spring 28.

[0132] In the opening operation of opening the window body 13 by pivoting the free end 20 of the window body 13 downward in the vertical direction from the closed state where the free end 20 of the window body 13 is pivoted to the fully closed position, in the torsion rotation number second adjustment mechanism 35b, when the free end 20 of the window body 13 pivots from the fully closed position to the open position and the rotary rod 25 rotates in the counterclockwise direction (the direction in which the turning chain 14 is unwound), as shown by the arrow in FIG. 18, the first rotation transmission plate 48 rotates in the counterclockwise direction together with the roller 26 (rotary rod 25). When the first rotation transmission plate 48 rotates counterclockwise by approximately one rotation (slightly less than one rotation), the other end face 53b of the convex portion 52a of the first rotation transmission plate 48 in the counterclockwise direction abuts against one end face 54a of the convex portion 52b of the first rotating plate 49a in the clockwise direction.

[0133] After the convex portion 52a of the first rotation transmission plate 48 abuts against the convex portion 52b of the first rotation plate 49a, when the rotation rod 25 further rotates in the counterclockwise direction, the rotation of the first rotation transmission plate 48 is transmitted from the convex portion 52a (rotation transmission means) to the first rotation plate 49a via the convex portion 52b (rotation passive means). With the convex portions 52a and 52b in contact with each other, the first rotation transmission plate 48 and the first rotation plate 49a rotate together in the counterclockwise direction along with the roller 26 (rotation rod 25). When the first rotation transmission plate 48 and the first rotation plate 49a rotate approximately one turn (less than one turn) in the counterclockwise direction, the other end face 54b in the counterclockwise direction of the convex portion 52b of the first rotation plate 49a abuts against the one end face 55a in the clockwise direction of the convex portion 52c of the second rotation plate 49b.

[0134] After the convex portion 52b of the first rotation plate 49a abuts against the convex portion 52c of the second rotation plate 49b, when the rotation rod 25 further rotates in the counterclockwise direction, the rotation of the first rotation plate 49a is transmitted from the convex portion 52b (rotation passive means) to the second rotation plate 49b via the convex portion 52c (rotation passive means). With the convex portions 52a to 52c in contact with each other, the first rotation transmission plate 48 and the first and second rotation plates 49a and 49b rotate together in the counterclockwise direction along with the roller 26 (rotation rod 26). When the first rotation transmission plate 48 and the first and second rotation plates 49a and 49b rotate a predetermined amount (less than one turn) in the counterclockwise direction, the other end face 55b in the counterclockwise direction of the convex portion 52c of the second rotation plate 49b abuts against the one end face 56a in the clockwise direction of the convex portion 52d of the second rotation transmission plate 50.

[0135] After the convex portion 52c of the second rotating plate 49b abuts against the convex portion 52d of the second rotation transmission plate 50, when the rotating rod 25 further rotates in the counterclockwise direction, the rotation of the second rotating plate 49b is transmitted from the convex portion 52c (rotation passive means) to the second rotation transmission plate 50 via the convex portion 52d (rotation passive means). With the convex portions 52a to 52d in contact with each other, the first rotation transmission plate 48, the first and second rotating plates 49a and 49b, and the second rotation transmission plate 50 rotate counterclockwise together with the roller 26 (rotating rod 25). When the first rotation transmission plate 48, the first and second rotating plates 49a and 49b, and the second rotation transmission plate 50 rotate counterclockwise, the first torsion spring 28 is twisted in the winding direction or the direction opposite to the winding direction in conjunction with the rotation of the second rotation transmission plate 50.

[0136] In this way, in the torsional rotation speed second adjustment mechanism 35b, as the convex portions 52b and 52c of the first and second rotating plates 49a and 49b (the first to nth rotating plates) sequentially abut against each other from the first rotating plate 49a toward the second rotating plate 49b (the nth rotating plate), the rotation of the rotating rod 25 is sequentially transmitted from the first rotation transmission plate 48 toward the second rotating plate 49b (the nth rotating plate). After that, the convex portion 52c of the second rotating plate 49b (the nth rotating plate) abuts against the convex portion 52d of the second rotation transmission plate 50, and the first rotation transmission plate 48, the first and second rotating plates 49a and 49b (the first to nth rotating plates), and the second rotation transmission plate 50 rotate together, so that the rotation of the rotating rod 25 is transmitted to the first torsion spring 28, and the torsion of the first torsion spring 28 starts (begins). In a state where the free end portion 20 of the window body 13 pivots to the fully open position and the window body 13 is fully opened, the first torsion spring 28 is in a twisted state (maximum twist state).

[0137] In the window opening / closing system 10, the rotary rod 25 rotates in the direction of feeding out the swivel chain 14 (swivel bar) (counterclockwise direction), and the free end 20 of the window body 13 is swiveled from the fully closed state (closed position) to the open position. After the rotary rod 25 rotates a predetermined number of times, the torsional rotation number second adjustment mechanism 35b starts to twist the first torsion spring 28, and the first torsion spring 28 is twisted in the winding direction or the direction opposite to the winding direction.

[0138] When the first torsion spring 28 is twisted in the winding direction or the direction opposite to the winding direction, the first torsion spring 28 generates a winding torque in the direction of winding up the swivel chain 14 (rearward in the front-rear direction) by the roller 26. The rotation of the roller 26 (rotary rod 25) is biased in the winding direction of the swivel chain 14 by the winding torque of the first torsion spring 28, and the rotational load acting on the rotary rod 25 (the operating load acting when the window body 13 is closed) when the free end 14 of the window body 13 is swiveled from the fully open state (open position) to the closed state (closed position) is reduced by the winding torque of the first torsion spring 28.

[0139] In the torsional rotation number second adjustment mechanism 35, after the rotary rod 25 rotates a predetermined number of times, the rotation of the rotary rod 25 is transmitted to the first torsion spring 28, and the torsion of the first torsion spring 28 starts. However, by increasing the number of rotating plates 49a, 49b, it is also possible to make the torsion of the first torsion spring 28 start after the rotary rod 25 rotates a larger number of times. Also, by reducing the number of rotating plates 49a, 49b, it is possible to make the torsion of the first torsion spring 28 start after the rotary rod 25 rotates a smaller number of times. When the number of rotating plates 49a, 49b is increased, the start of the torsion of the first torsion spring 28 is delayed, and the winding torque of the first torsion spring 28 decreases. Conversely, when the number of rotating plates 49a, 49b is reduced, the start of the torsion of the first torsion spring 28 is advanced, and the winding torque of the first torsion spring 28 increases.

[0140] When the other side of the ball chain 31 is operated downward and the free end 20 of the window body 13 is rotated from the fully open state (open position) to the closed state (closed position), the sprocket 30 rotates in the clockwise direction and the rotating rod 25 rotates in the clockwise direction. In conjunction with the rotation of the rotating rod 25, the first rotation transmission plate 47 rotates in the clockwise direction. At this time, since the winding torque is developed in the first torsion spring 28, due to the biasing force in the clockwise direction thereby, with the convex portions 52d of the second rotation transmission plate 50, the convex portions 52c of the second rotation plate 49b, the convex portions 52b of the first rotation plate 49a, and the convex portions 52a of the first rotation transmission plate 48 being in contact, it rotates in the clockwise direction together with the rotation of the rotating rod 25 until the torsion of the first torsion spring 28 is unwound.

[0141] After the torsion of the first torsion spring 28 is unwound, the first rotation transmission plate 48 rotates in the clockwise direction in conjunction with the rotation of the rotating rod 25 (roller 26). When the first rotation transmission plate 48 rotates approximately one turn (less than one turn) in the clockwise direction, one end face 53a in the clockwise direction of the convex portion 52a of the first rotation transmission plate 48 abuts against the other end face 54b in the counterclockwise direction of the convex portion 52b of the first rotation plate 49a. After the convex portion 52a of the first rotation transmission plate 48 abuts against the convex portion 52b of the first rotation plate 49a, the first rotation transmission plate 48 and the first rotation plate 49a rotate together in the clockwise direction.

[0142] When the first rotation transmission plate 48 and the first rotation plate 49a rotate approximately one turn (less than one turn) in the clockwise direction, one end face 54a in the clockwise direction of the convex portion 52b of the first rotation plate 49a abuts against the other end face 55b in the counterclockwise direction of the convex portion 52c of the second rotation plate 49b. After the convex portion 52b of the first rotation plate 49a abuts against the convex portion 52c of the second rotation plate 49b, the first rotation transmission plate 48 and the first and second rotation plates 49a, 49b rotate together in the clockwise direction.

[0143] The first rotation transmission plate 48, the first and second rotation plates 49a and 49b rotate in the clockwise direction. Before one end face 55a in the clockwise direction of the convex portion 52c of the second rotation plate 49b contacts the other end face 56b in the counterclockwise direction of the convex portion 52d of the second rotation transmission plate 50, the free end portion 20 of the window body 13 rotates to the fully closed position. The first rotation transmission plate 48, the first and second rotation plates 49a and 49b (the first to nth rotation plates), and the second rotation transmission plate 50 of the torsional rotation speed second adjustment mechanism 35b return to the state shown in FIG. 18.

[0144] The window opening and closing system 10 can twist the first torsion spring 28 after the rotary rod 25 rotates a set number of times by using the first rotation transmission plate 48, the first and second rotation plates 49a and 49b (the first to nth rotation plates), and the second rotation transmission plate 50 that form the torsional rotation speed second adjustment mechanism 35b, and can adjust the strength of the winding torque of the first torsion spring 28. The window opening and closing system 10 can freely and optimally adjust the winding torque of the first torsion spring 28 according to the characteristics such as the size, weight, and shape of the window body 13.

[0145] The window opening and closing system 10 can increase the winding torque of the first torsion spring 28 by reducing the number of the first and second rotation plates 49a and 49b (the first to nth rotation plates), and can decrease the winding torque of the first torsion spring 28 by increasing the number of the first and second rotation plates 49a and 49b (the first to nth rotation plates). By adjusting the number of the first and second rotation plates 49a and 49b (the first to nth rotation plates) (for example, adjusting in the range of 1 to 5), the winding torque of the first torsion spring 28 can be increased or decreased, and the operating load acting when the window body 13 is closed can be reliably reduced. By using the adjusted winding torque of the first torsion spring 28, the free end portion 20 of the opened window body 13 can be smoothly rotated without requiring a large force, and the window body 13 can be easily closed.

[0146] When the winding torque of the first torsion spring 28 is too strong in the window opening / closing system 10, when the free end 20 of the window body 13 is rotated to the fully open position, the free end 20 cannot be smoothly rotated to the fully open position by the winding torque of the first torsion spring 28, and the opening of the window body 13 may be incomplete. However, by adjusting the strength of the winding torque of the first torsion spring 28 by the torsional rotation number second adjustment mechanism 35b, the free end 20 of the window body 13 can be smoothly rotated to the fully open position, and the window body 13 can be quickly opened.

[0147] FIG. 20 is a front view showing an example of a smoke exhaust window 57 in which the window opening / closing system 10 is installed, and FIG. 21 is a top view of the smoke exhaust window 57. FIG. 22 is a side view of the smoke exhaust window 57, and FIG. 23 is a partially enlarged perspective view of the erection unit 58. In FIGS. 20 and 21, the vertical direction is indicated by arrow X, the horizontal direction is indicated by arrow Y, and the front-rear direction is indicated by arrow Z. In FIG. 20, two first and second window frames 12a, 12b and two first and second window bodies 13a, 13b are shown, but the number of window frames and window bodies is not particularly limited, and there may be one window frame or window body, or there may be three or more window frames or window bodies.

[0148] The window opening / closing system 10 is installed in the smoke exhaust window 57. The smoke exhaust window 57 is installed in a building and is normally used for air replacement (indoor ventilation). In an emergency (such as a fire, chemical leakage, chemical agent leakage, gas leakage, etc.), it is used as an exhaust means for exhausting harmful smoke, toxic gas, etc. to the outside. The window opening / closing system 10 includes a first window frame 12a and a second window frame 12b, a first window body 13a (first shoji) installed on the first window frame 12a and a second window body 13b (second shoji) installed on the second window frame 12b, a first turning chain 14a (turning strip) for turning the first window body 13a and a second turning chain 14b (turning strip) for turning the second window body 13b, an erection unit 58 (chain box), a first housing unit 29a and a second housing unit 29b, and a turning strip operating means (chain operating means) for operating (feeding out or winding up) the first and second turning chains 14a, 14b.

[0149] The swivel bar actuating means (chain actuating means) is formed by a guide line 59 (slide line), a slider 60 (rotational force applying means), a locking mechanism 61, a traction chain 62 (traction member) (rotational force applying means), and a first rotation mechanism 15a and a second rotation mechanism 15b. The guide line 59, the slider 60, the locking mechanism 61, and the traction chain 62 are installed in the erection unit 58. The first rotation mechanism 15a is installed and housed in the first housing unit 29a, and the second rotation mechanism 15b is installed and housed in the second housing unit 29b.

[0150] The first window frame 12a and the second window frame 12b are installed at a high position (near the ceiling) of a predetermined building, and they are arranged side by side in the horizontal direction with the same shape and size of rectangles that are long in the horizontal direction. These window frames 12a, 12b are formed by an upper frame 16 installed near the ceiling and extending straight in the horizontal direction, a lower frame 17 installed below the upper frame 16 and extending straight in the horizontal direction, and both side frames 18 extending straight in the vertical direction. In these window frames 12a, 12b, the upper frame 16 and the lower frame 17 are spaced apart and opposed to each other in the vertical direction so as to be parallel to each other, and both side frames 18 are spaced apart and opposed to each other in the horizontal direction so as to be parallel to each other. In these window frames 12a, 12b, the upper and lower frames 16, 17 and both side frames 18 form two window (shoji) installation spaces with the same shape and size of rectangles that are long in the horizontal direction.

[0151] The upper and lower frames 16 and 17 and the both-side frames 18 are formed in a substantially angular shape (L-shaped), similar to those of the opening / closing window 11. The upper frame 16 has an upper frame plate and an upper contact plate, and the lower frame 17 has a lower frame plate and a lower contact plate. The both-side frames 18 have side frame plates and both-side contact plates. The first and second window frames 12a and 12b are connected to the wall by existing connecting means, and the window frames 12a and 12b are connected to each other. Immediately below the first and second window frames 12a and 12b (the first and second window bodies 13a and 13b), an opening / closing window facility 22 in which glass (glass shoji) is fitted into a window frame (resin sash, aluminum sash, aluminum-resin composite sash) is provided. The window frames 12a and 12b and the window facility 22 are connected by existing connecting means.

[0152] The first and second window bodies 13a and 13b are rotatably attached to the first and second window frames 12a and 12b. The first and second window bodies 13a and 13b rotate from a closed state (closed position) to an open state (open position) and rotate from the open state to the closed state. The window bodies 13a and 13b have a rotating end portion 19 (rotating frame) rotatably connected (installed) to the lower frame 17 of the window frames 12a and 12b, a free end portion 20 (swinging frame) spaced apart and facing upward from the rotating end portion 19, and both-side portions 21 (both-side frames) spaced apart in the lateral direction and extending straight in the vertical direction. At the lateral center of the free end portion 20, a shoji fitting 23 (not shown) is installed and fixed.

[0153] The first turning chain 14a (roller chain) has its tip end connected to the shutter fitting 23 at the free end 20 of the first window body 13a, and the second turning chain 14b (roller chain) has its tip end connected to the shutter fitting 23 at the free end 20 of the second window body 13b. These turning chains 14a, 14b turn the free ends 20 of the first and second window bodies 13a, 13b from the closed state (closed position) to the open state (open position), and also turn the free ends 20 of these window bodies 13a, 13b from the open state to the closed state. The first and second turning chains 14a, 14b have linearity (straight - advancing property) of moving in their axial direction (extending direction), and at the start of the initial movement (start of turning) of turning the first and second window bodies 13a, 13b from the closed state to the open state, they exert a feeding force (kicking - out force) that promotes (facilitates) the turning of the free end 20 by this linearity.

[0154] In the smoke exhaust window 57, when the first and second turning chains 14a, 14b are fed out in one direction (forward in the front - rear direction), the free ends 20 of the first and second window bodies 13a, 13b turn downward in the vertical direction around the rotating end 19, and these window bodies 13a, 13b turn from the closed state (closed position) to the open state (open position). When the first and second turning chains 14a, 14b are pulled in the other direction (rearward in the front - rear direction), the free ends 20 of the first and second window bodies 13a, 13b turn upward in the vertical direction around the rotating end 19, and these window bodies 13a, 13b turn from the open state to the closed state (closed position).

[0155] In addition, in the window opening - closing system 10 shown in FIGS. 20 to 23, when the first and second rotating rods 25a, 25b, the sprocket 30, and the first and second rollers 26a, 26b described later rotate in the clockwise direction, the turning chains 14a, 14b are fed out in one direction, and when the first and second rotating rods 25a, 25b, the sprocket 30, and the first and second rollers 26a, 26b rotate in the counter - clockwise direction, the turning chains 14a, 14b are pulled in the other direction.

[0156] The installation unit 58 is made of a metal such as an aluminum alloy or stainless steel, or a synthetic resin, and extends straight downward from both side frames 18 of the first window frame 12a. The installation unit 58 includes first and second installation plates 63a and 63b that are identical in shape and size, extend in the vertical direction, and face each other in the front-rear direction; a base plate 64 and a cover plate 65 that are located between the first and second installation plates 63a and 63b and extend in the vertical direction parallel to those installation plates; a first chain accommodation space 66a (first guide recess) that is located on the side of the first installation plate 63a and extends in the vertical direction parallel to the first installation plate 63a; and a second chain accommodation space 66b (second guide recess) that is located on the side of the second installation plate 63b and extends in the vertical direction parallel to the second installation plate 63b.

[0157] In the installation unit 58, the cover plate 65 is detachably attached to the first and second installation plates 63a and 63b that extend upward from the upper end 67 of the guide line 59, and partially covers the accommodation spaces 66a and 66b of the installation unit 58. In the installation unit 58, the first installation plate 63a is connected and fixed to both side frames 18 of the first window frame 12a and the window frame of the window equipment 22 by a predetermined connecting means (bracket, bolt and nut, rivet, welding, etc.). In the first chain accommodation space 66a, the towing chain 62 is accommodated so as to be vertically movable (slidable). In the second chain accommodation space 66b, the towing chain 62 is accommodated so as to be vertically movable (slidable).

[0158] The guide line 59 is formed in the installation unit 58, is located below the window bodies 13a and 13b (first and second window frames 12a and 12b), and extends downward from both side frames 18 that form the first window frame 12a. The guide line 59 has an upper end 67 (lower end of the cover plate 65) located on the side of the window bodies 13a and 13b, a lower end 69 located on the ground side, and an intermediate portion 68 (moving space) that extends in the vertical direction between the upper end 67 and the lower end 69.

[0159] The slider 60 is made of a metal such as an aluminum alloy or stainless steel, and is formed from an upper plate 70 shaped into a substantially plate-like shape that is long in the vertical direction, and a lower plate 71 shaped into a substantially plate-like shape that is long in the vertical direction and is located below the upper plate 70. The slider 60 is disposed in the middle portion 68 (moving space) of the guideline 59, and by sliding the first chain accommodating space 66a (first guide recess) in the vertical direction, the middle portion 68 (the vertical central area of the erection unit 58) slides upward in the vertical direction from the lower end 69 to the upper end 67 of the guideline 59, and at the same time, the middle portion 68 (the vertical central area of the erection unit 58) slides downward in the vertical direction from the upper end 67 to the lower end 69 of the guideline 58.

[0160] One end of the towing chain 62 is connected to the upper end portion of the upper plate 70. A first connecting plate 72 extending in the front-rear direction (the direction perpendicular to the plane of FIG. 23) perpendicular to the plate 70 is integrally formed at the lower end of the upper plate 70. A second connecting plate 73 extending in the front-rear direction (the direction perpendicular to the plane of FIG. 23) perpendicular to the plate 71 and facing the first connecting plate 72 is integrally formed at the upper end of the lower plate 71. A screw hole (threaded hole) for screwing the threaded portion of an adjustment screw 74 described later is formed in the first connecting plate 72, and a clearance hole is formed in the second connecting plate 73.

[0161] An adjustment screw 74 for adjusting the vertical separation dimension between the plates 72 and 73 is installed on the first connecting plate 72 and the second connecting plate 73. The threaded portion of the adjustment screw 74 is screwed into the screw hole (threaded hole) of the first connecting plate 72. A nut is screwed onto the threaded portion of the adjustment screw 74. For example, by rotating the adjustment screw 74 in the clockwise direction (positive direction), the first connecting plate 72 and the second connecting plate 73 gradually approach each other, and the vertical separation dimension between the upper plate 70 and the lower plate 71 can be shortened. By rotating the adjustment screw 74 in the counterclockwise direction (reverse direction), the first connecting plate 72 and the second connecting plate 73 gradually separate from each other, and the vertical separation dimension between the upper plate 70 and the lower plate 71 can be lengthened.

[0162] When the locking mechanism 61 slides the slider 60 downward in the vertical direction and the slider 60 is positioned at the lower end 69 of the guide line 59, the locking mechanism 61 locks the sliding (vertical movement) of the slider 60 while applying a predetermined tension to the towing chain 62. The locking mechanism 61 is formed of an engagement cam 75 (flat cam) and a pivot lever 76 (pivot handle) made of a metal such as an aluminum alloy or stainless steel. The engagement cam 75 is disposed at the lower end 69 of the guide line 59 and is connected (fixed) to the lower end 69 of the guide line 59 (the lower ends of the first and second erection plates 63a and 63b of the erection unit 58 and the base plate 64) by a predetermined connecting means (bolt, rivet, welding, etc.). The engagement cam 75 has an outer peripheral edge 77 that slopes downward in a downward gradient in the vertical direction.

[0163] The pivot lever 76 is installed at the lower end of the lower plate 71 of the slider 60 and is formed of a rotary base end portion 78 and a gripping portion 79 (handle). The rotary base end portion 78 is rotatably attached to the lower end of the lower plate 71. The pivot lever 76 pivots (rotates) the gripping portion 79 in the pivoting direction (front-rear direction) (clockwise or counterclockwise direction) of the window body 13a about the rotary base end portion 78. On the side of the gripping portion 79 (handle) toward the rotary base end portion 78, a pivot arm 80 extending laterally (outward) from the side edge portion thereof is integrally formed (connected). An engagement pin 81 that protrudes toward the base plate 64 of the erection unit 58 is formed on the pivot arm 80. The engagement pin 81 engages with and disengages from the engagement cam 75. When the pivot arm 80 pivots the gripping portion 79 (pivot lever 76) in the counterclockwise direction, the tip of the pivot arm 80 abuts against the inner surface of the second erection plate 63b of the erection unit 58, and further pivoting of the gripping portion 79 in the counterclockwise direction stops.

[0164] The engaging pin 81 rotates (turns) in the turning direction (front-rear direction) (clockwise or counterclockwise) of the window body 13a together with the turning arm 80 as the gripping part 79 (swing lever 76) turns (rotates). In the swing lever 76, the engaging pin 81 moves slidably along the outer peripheral edge 77 of the engaging cam 75. While pressing (pushing down) the gripping part 79 (swing lever 76) downward in the vertical direction and applying a turning force to the gripping part 79, the engaging pin 81 slides (gets over) along the outer peripheral edge 77 of the engaging cam 75 in one direction and slides (gets over) along the outer peripheral edge 77 of the engaging cam 75 in the other direction. The engaging pin 81 engages with the engaging cam 75 in a state where it has moved (got over) along the outer peripheral edge 77 of the engaging cam 75 in one direction.

[0165] In addition, the position of the engaging pin 81 relative to the outer peripheral edge 77 of the engaging cam 75 is adjusted so that the engaging pin 81 can slide (get over) along the outer peripheral edge 77 in one direction or the other direction. By adjusting the vertical separation dimension between the upper plate 70 and the lower plate 71 using the adjusting screw 74, when locking the slide (vertical movement) of the slider 60, an optimal tension can be applied to the traction chain 62, and the engaging pin 81 of the swing lever 76 can slide (get over) along the outer peripheral edge 77 of the engaging cam 75 in one direction or the other direction with an appropriate force.

[0166] The traction chain 62 (traction member) is made of a metal such as steel, stainless steel, or titanium, and one end thereof is connected to the upper end of the upper plate 70 of the slider 60 and is accommodated in the first chain accommodation space 66a (first guide recess) and the second chain accommodation space 66b (second guide recess) and extends in the vertical direction. The traction chain 62 moves up and down in the first chain accommodation space 66a and the second chain accommodation space 66b as the slider 60 slides (moves up and down) in the vertical direction. In addition, the other end (free end) of the traction chain 62 is located in the second chain accommodation space 66b (second guide recess) and hangs downward from the sprocket 30.

[0167] The first and second rotating mechanisms 15a and 15b are interlocked with the vertical movement of the traction chain 62 caused by the vertical sliding of the slider 60, pay out the first and second turning chains 14a and 14b in one direction (forward in the front-rear direction), and take in (wind up) the turning chains 14a and 14b in the other direction (rearward in the front-rear direction). The first rotating mechanism 15a is formed by a first rotating rod 25a, a sprocket 30, a first roller 26a, a first ring mounting drum 27a, and a first torsion spring 82a (a first torsion spring 28). The first rotating rod 25a, the sprocket 30, the first roller 26a, the first ring mounting drum 27a, and the first torsion spring 82a (coil spring) are installed (accommodated) in the first housing unit 29a.

[0168] The second rotating mechanism 15b is formed by a second rotating rod 25b, a second roller 26b, a second ring mounting drum 27b, and a second torsion spring 82b (a first torsion spring 28). The second rotating rod 25b, the second roller 26b, the second ring mounting drum 27b, and the second torsion spring 82b (coil spring) are installed (accommodated) in the second housing unit 29b.

[0169] The first and second rotating rods 25a and 25b are rotatably accommodated in the first and second housing units 29a and 29b (rotatably installed in the window frames 12a and 12b) and extend horizontally. One end and the middle part of the first rod 25a are rotatably supported by the bearing plate 32 of the first housing unit 29a. One end and the middle part of the second rotating rod 25b are rotatably supported by the bearing plate 32 of the second housing unit 29b. The first and second rotating rods 25a and 25b are connected and integrated at their other ends.

[0170] The sprocket 30 is attached to the other end of the first rotating rod 25a. The traction chain 62 is engaged with the teeth of the sprocket 30. The sprocket 30 rotates in the clockwise direction (positive direction) or the counterclockwise direction (reverse direction) as the traction chain 62 moves up and down, and transmits the rotational force to the first and second rotating rods 25a and 25b.

[0171] The first roller 26a is installed (fitted) at the middle part of the first rotating rod 25a, and the second roller 26b is installed (fitted) at the middle part of the second rotating rod 25b. The first roller 26a rotates in the clockwise direction (positive direction) or counterclockwise direction (reverse direction) as the first rotating rod 25a rotates, and the second roller 26b rotates in the clockwise direction (positive direction) or counterclockwise direction (reverse direction) as the second rotating rod 25b rotates. The other end of the first turning chain 14a is connected and fixed to the first roller 26a, and the other end of the second turning chain 14b is connected and fixed to the second roller 26b. The first ring mounting drum 27a is installed (fitted) on the side of one end of the first rotating rod 25a (laterally outward of the first roller 26a), and the second ring mounting drum 27b is installed (fitted) on the side of one end of the second rotating rod 25b (laterally outward of the second roller 26b).

[0172] The first torsion spring 82a is attached to the first ring mounting drum 27a and extends in the axial direction of the first rotating rod 25a. The second torsion spring 82b is attached to the second ring mounting drum 27b and extends in the axial direction of the second rotating rod 25b. The outer diameter, inner diameter, and number of turns of these torsion springs 82a, 82b can be arbitrarily set according to the torque required for the upward turning of the first and second window bodies 13a, 13b (shoji) in the vertical direction (the auxiliary force required for the downward slide of the slider 60 in the vertical direction).

[0173] In the first rotation mechanism 15a, with the first ring mounting drum 27a inserted through the first torsion spring 82a, the fixed point of the arm of the first torsion spring 82a is connected and fixed to either the support plate 40 or the bearing plate 32 of the first housing unit 29a, and the load point of the arm of the first torsion spring 82a is connected and fixed to the outer peripheral edge of the first rotation rod 25a. In the second rotation mechanism 15b, with the second ring mounting drum 27b inserted through the second torsion spring 82b, the fixed point of the arm of the second torsion spring 82a is connected and fixed to either the support plate 40 or the bearing plate 32 of the second housing unit 29b, and the load point of the arm of the second torsion spring 82b is connected and fixed to the outer peripheral edge of the second rotation rod 25b.

[0174] When the first and second rotation rods 25a, 25b rotate in the clockwise direction and the first and second roller chains 14a, 14b are fed out in one direction (forward in the front-rear direction) from the first and second rollers 26a, 26b, the first and second torsion springs 82a, 82b are twisted in the winding direction or in the direction opposite to the winding direction. When the first and second torsion springs 82a, 82b are twisted in the direction opposite to the winding direction, they generate torque (repulsive force) in the opposite direction (winding direction) proportional to the twisted angle, and when they are twisted in the winding direction, they generate torque (repulsive force) in the opposite direction (opposite to the winding direction) proportional to the twisted angle.

[0175] The torque (outer diameter, inner diameter, number of turns, spring rate) of the first and second torsion springs 82a, 82b is adjusted so that the load acting on the slider 60 when the first and second window bodies 13a, 13b are pivoted upward from the lower side in the vertical direction is about 1.5 to 2 kgf. Further, when the window bodies 13a, 13b are opened from the closed state, the torque (spring force) of the first and second torsion springs 82a, 82b is adjusted so that the free end 20 automatically pivots downward in the vertical direction by the self-weight of the window bodies 13a, 13b during the pivoting process except at the initial movement.

[0176] An example of the procedure for opening the first and second window bodies 13a and 13b to the fully open state by pivoting the free ends 20 of the window bodies 13a and 13b downward in the vertical direction from the state where the first and second window bodies 13a and 13b are closed in the fully closed state is as follows. Incidentally, in the state where the first and second window bodies 13a and 13b are closed in the fully closed state, the slider 60 is located at the lower end 69 of the guide line 59, and the engagement pin 81 of the pivot lever 76 slides (climbs over) along the outer peripheral edge 77 of the engagement cam 75 in one direction, and the engagement pin 81 moves to the lock position, and the slide (vertical movement) of the slider 60 is locked in the state where the tension is applied to the towing chain 62. In the state where the slide of the slider 60 is locked, the pivot lever 76 hangs downward from the lower end 69 of the guide line 59.

[0177] While holding the grip portion 79 (handle) of the pivot lever 76, while pressing (pushing down) the pivot lever 76 downward in the vertical direction, a pivoting force is applied to the grip portion 79 of the pivot lever 76 in the counterclockwise direction (reverse direction). By applying a pivoting force to the grip portion 79, the pivot arm 80 and the engagement pin 81 pivot in the counterclockwise direction (reverse direction), and the engagement pin 81 slides (climbs over) along the outer peripheral edge 77 of the engagement cam 75 in the other direction, and the engagement pin 81 moves to the unlocking position, and the engagement between the engagement pin 81 and the engagement cam 75 is released. When the engagement pin 81 is moved to the unlocking position, the lock on the slide (vertical movement) of the slider 60 is released, and the tension acting on the towing chain 62 is released.

[0178] When the grip portion 79 of the pivot lever 76 is pivoted in the counterclockwise direction, the pivot arm 80 also pivots in the counterclockwise direction (reverse direction) in the same manner, and the tip of the pivot arm 80 abuts against the inner surface of the second mounting plate 63b of the mounting unit 58. When the tip of the pivot arm 80 abuts against the inner surface of the second mounting plate 63b, the counterclockwise pivoting of the grip portion 79 (pivot lever 76) stops at that point.

[0179] Next, while gripping the gripping portion 79 (handle) of the swivel lever 76, slide (push up) the slider 60 upward in the vertical direction from the lower end 69 to the upper end 67 of the guideline 59 together with the swivel lever 76. When the slider 60 is slid upward in the vertical direction, the traction chain 62 located in the first chain accommodation space 66a operates upward in conjunction with the slide of the slider 60, and the sprocket 30 engaged with the traction chain 62 rotates in the clockwise direction. When the sprocket 30 rotates, the first and second rotating rods 25a, 25b (rotating mechanisms 15a, 15b) rotate in the clockwise direction in conjunction therewith, and the first and second rollers 26a, 26b rotate in the clockwise direction as the first and second rotating rods 25a, 25b rotate. When the first and second rollers 26a, 26b rotate in the clockwise direction, the first and second swivel chains 14a, 14b are fed out from the first and second rollers 26a, 26b in one direction (forward in the front-rear direction).

[0180] At the start of the initial movement (start of turning) when the free ends 20 of the first and second window bodies 13a, 13b are turned from the closed state (closed position) to the open state (open position), due to the linearity (straight - advancing property) of the first and second swivel chains 14a, 14b, the first and second swivel chains 14a, 14b exert a feeding force (kicking - out force) that promotes (facilitates) the downward turning in the vertical direction of the free ends 20 of the first and second window bodies 13a, 13b, and a downward turning force in the vertical direction is applied to the free ends 20 of those window bodies 13a, 13b. The first and second window bodies 13a, 13b turn by utilizing the feeding force of the first and second swivel chains 14a, 14b at the start of the initial movement when the free ends 20 of those window bodies 13a, 13b turn from the closed position to the open position.

[0181] In the turning process except for the initial movement, due to the self - weight of the window bodies 13a and 13b, the free ends 20 of the window bodies 13a and 13b automatically turn downward in the vertical direction around the rotating end 19. When the free ends 20 of the first and second window bodies 13a and 13b automatically turn downward in the vertical direction, the first and second turning chains 14a and 14b are automatically fed out in one direction (forward in the front - rear direction), the first and second rotating rods 25a and 25b (rotating mechanisms 15a and 15b) automatically rotate in the clockwise direction, and the sprocket 30 automatically rotates in the clockwise direction. Further, the traction chain 62 automatically operates upward, and the slider 60 automatically slides upward toward the upper end 67 of the guide line 59.

[0182] When the first turning chain 14a is fed out in one direction (forward in the front - rear direction) from the first roller 27a and the first rotating rod 25a (the first ring mounting drum 27a) rotates in the clockwise direction, the first torsion spring 82a twists with the fixed point of its arm as the twisted base end and the load point of the arm twists in the direction opposite to the winding direction or in the winding direction. When the second turning chain 14b is fed out in one direction (forward in the front - rear direction) from the second roller 26b and the second rotating rod 25b (the second ring mounting drum 27b) rotates in the clockwise direction, the second torsion spring 82b twists with the fixed point of its arm as the twisted base end and the load point of its arm twists in the direction opposite to the winding direction or in the winding direction.

[0183] When the first and second torsion springs 82a and 82b twist in the direction opposite to the winding direction or in the winding direction, they generate winding torque in the opposite direction (the winding direction or the direction opposite to the winding direction) proportional to the twisted angle of the torsion springs 82a and 82b, and the winding torque of these torsion springs 82a and 82b applies a turning force to the free ends 20 of the first and second window bodies 13a and 13b to turn upward in the vertical direction from the fully - open position to the closed position.

[0184] An example of the procedure for closing the window bodies 13a and 13b by pivoting the free ends 20 of the first and second window bodies 13a and 13b upward in the vertical direction from the open state in which the free ends 20 of the first and second window bodies 13a and 13b are pivoted to the fully open position is as follows. While gripping the gripping portion 79 (handle) of the pivot lever 76, the slider 60 is slid (pushed down) downward in the vertical direction together with the pivot lever 76 from the upper end 67 to the lower end 69 of the guideline 59. Incidentally, the torque (repulsive force) of the first and second torsion springs 82a and 82b adjusts the load acting on the slider 60 when the window bodies 13a and 13b are pivoted upward from the lower direction to the upper direction to about 1.5 to 2 kgf.

[0185] When the slider 60 is slid downward, the traction chain 62 operates downward in the vertical direction in the first chain accommodation space 66a in conjunction with the slide of the slider 60, and the sprocket 30 engaged with the traction chain 62 rotates in the counterclockwise direction. When the sprocket 30 rotates, the first and second rotating rods 25a and 25b (rotation mechanisms 15a and 15b) rotate in the counterclockwise direction in conjunction with it, and the first and second pivot chains 14a and 14b are wound around the first and second rollers 26a and 26b in the other direction (rearward in the front-rear direction).

[0186] As the first and second pivot chains 14a and 14b are wound around the first and second rollers 26a and 26b, the free ends 20 of the first and second window bodies 13a and 13b start to pivot upward in the vertical direction from the open position toward the closed position. Since the pivoting force for pivoting the free ends 20 of the first and second window bodies 13a and 13b from the open position toward the closed position is applied by the winding torque of the first and second torsion springs 82a and 82b, the entire weight of the window bodies 13a and 13b does not act on the slide of the slider 60, and a load (in the range of 1.5 to 2 kgf) obtained by subtracting the winding torque of the torsion springs 82a and 82b from the weight of the window bodies 13a and 13b acts on the slider 60.

[0187] By sliding (pushing down) the slider 60 to the lower end 69 of the guide line 59, the first and second window bodies 13a and 13b pivot from the open state to the closed state. When the first and second window bodies 13a and 13b are fully closed, the twists of the first and second torsion springs 82a and 82b return, and the winding torques of these torsion springs 82a and 82b become zero. After sliding the slider 60 to the lower end 69 of the guide line 59, while holding the gripping portion 79 of the pivot lever 76, while pressing (pushing down) the pivot lever 76 downward in the vertical direction, a turning force is applied to the gripping portion 79 in the clockwise direction (positive direction).

[0188] By applying a turning force to the gripping portion 79 and pivoting the pivot lever 76 15 to 20° in the clockwise direction (positive direction), the engagement pin 81 pivots in the clockwise direction (positive direction), and the engagement pin 81 slides (climbs over) along the outer peripheral edge 77 of the engagement cam 75 in one direction, the engagement pin 81 moves to the lock position, and the engagement pin 81 engages with the engagement cam 75. When the engagement pin 81 is moved to the lock position, the pivot lever 76 hangs downward from the lower end 69 of the guide line 59, a tension force is applied to the towing chain 62, and the sliding (vertical movement) of the slider 60 is locked.

[0189] When closing the first and second window bodies 13a and 13b that are in the open state without using the first and second torsion springs 82a and 82b, a considerable force is required to slide the slider 60 downward in the vertical direction due to the self-weight of the window bodies 13a and 13b. However, the winding torque (repulsive force) of the torsion springs 82a and 82b promotes the winding of the first and second turning chains 14a and 14b around the first and second rollers 26a and 26b. The torque (spring force) of the torsion springs 82a and 82b is adjusted so that the load acting on the slider 60 when the window bodies 13a and 13b are pivoted upward from the downward direction in the vertical direction is about 1.5 to 2 kgf. Therefore, by using the torsion springs 82a and 82b, the slider 60 can be easily slid downward in the vertical direction without requiring a large force, and the free ends 20 of the first and second window bodies 13a and 13b can be smoothly pivoted from the open state (open position) to the closed state (closed position), allowing the window bodies 13a and 13b to be easily closed.

[0190] In the window opening and closing system 10 installed in the smoke exhaust window 57 of FIG. 20, as described above, when the window bodies 13a and 13b are pivoted from the open state to the fully closed state, during the pivoting to the closed state, the torsion of the first and second torsion springs 82a and 82b returns, the winding torque of the torsion springs 82a and 82b disappears, and after the winding torque becomes 0, the first and second torsion springs 82a and 82b may be twisted in the winding direction or in the direction opposite to the winding direction so as to generate a payout torque in the direction opposite to the direction in which the winding torque is generated. In this case, in the closed state where the free ends 20 of the window bodies 13a and 13b are pivoted to the fully closed position, the first and second torsion springs 82a and 82b generate a payout torque in the direction in which the first and second rollers 26a and 26b pay out the first and second turning chains 14a and 14b (turning strips).

[0191] In the window opening / closing system 10, in the closed state where the free ends 20 of the window bodies 13a and 13b are pivoted to the fully closed position, the rotation of the first and second rollers 26a and 26b is biased in the payout direction of the first and second pivot chains 14a and 14b by the payout torque of the first A and second torsion springs 82a and 82b, and the payout of the first and second pivot chains 14a and 14b from the rollers 26a and 26b is promoted (facilitated) by the payout torque of these torsion springs 82a and 82b. At the start of pivoting the free ends 20 of the window bodies 13a and 13b from the fully closed state (closed position) to the open state, the payout torque of these torsion springs 82a and 82b acts on the free ends 20 of the window bodies 13a and 13b, and the free end 20 of the window body 13 smoothly starts to pivot downward in the vertical direction by the payout torque of the first torsion spring 28 at the start of movement. After passing the start of movement, the free end 20 pivots downward in the vertical direction due to the self-weight of the window body 13. In this case, the window opening / closing system 10 has the same effect as the window opening / closing system 10 shown in FIG. 11.

[0192] In the window opening / closing system 10 installed in the smoke exhaust window 57 of FIG. 20, similar to the window opening / closing system 10 shown in FIG. 11, the first A torsion spring 82a is formed from the first and second torsion springs 28 and 34, the first torsion spring 28 and the second torsion spring 34 are installed on the first rotating rod 25a, the second B torsion spring 82b is formed from the first and second torsion springs 28 and 34, the first torsion spring 28 and the second torsion spring 34 are installed on the second rotating rod 25b, and further, the first A and second B torsion springs 82a and 82b (the second torsion spring 34) may be provided with a first torsion rotation number adjustment mechanism 35a.

[0193] In this case, when the free ends 20 of those window bodies 13a and 13b are pivoted upward in the vertical direction from the fully open state toward the closed position, after the rotary rods 25a and 25b are rotated by the number of rotations set by the torsional rotation number first adjustment mechanism 35a, the torsion of the second torsion spring 34 starts. Incidentally, the first and second torsion springs 28 and 34 are the same as those of the window opening and closing system 10 in FIG. 11, and the torsional rotation number first adjustment mechanism 35a is the same as that of the window opening and closing system 10 in FIG. 11. In this case, the window opening and closing system 10 has the same effect as the window opening and closing system 10 shown in FIG. 11.

[0194] In the window opening and closing system 10 installed in the smoke exhaust window 57 of FIG. 20, similar to the window opening and closing system 10 shown in FIG. 18, the first torsion spring 82a may have the torsional rotation number second adjustment mechanism 35b, and the second torsion spring 82b may have the torsional rotation number second adjustment mechanism 35b. In this case, when the free ends 20 of the first and second window bodies 13a and 13b are pivoted downward in the vertical direction from the fully closed state toward the open position, after the first and second rotary rods 25a and 25b are rotated by the number of rotations set by the torsional rotation number second adjustment mechanism 35b, the torsion of the first and second torsion springs 82a and 82b starts. Incidentally, in this case, a rotary wire can also be used as the pivot bar.

[0195] In the window opening / closing system 10 provided with the torsional rotation speed second adjustment mechanism 35b, when the first and second window bodies 13a and 13b are fully opened, the first and second torsion springs 82a and 83b are twisted in the winding direction or the direction opposite to the winding direction, and the first and second rollers 26a and 26b wind the turning chains 14a and 14b (turning strips) in the winding direction, the first and second torsion springs 82a and 83b generate winding torque, and the rotation of the rollers 26a and 26b is biased in the winding direction of the turning chains 14a and 14b (turning strips) by the winding torque of these torsion springs 82a and 83b. When the window bodies 13a and 13b are swung from the fully opened state (open position) to the closed state, the rotational load acting on the first and second rotating rods 25a and 25b (the operating load acting when the window bodies 13a and 13b are closed) is reduced by the winding torque of the first and second torsion springs 82a and 83b. The torsional rotation speed second adjustment mechanism 35b is the same as that of the window opening / closing system 10 in FIG. 18. In this case, the window opening / closing system 10 has the same effect as the window opening / closing system 10 shown in FIG. 18.

Brief Description of the Drawings

[0196]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Figure 18

Figure 19

Figure 20

Figure 21

Figure 22

Figure 23

Explanation of symbols

[0197] 10 Window opening and closing system 11 Opening and closing window 12 Window frame 12a First window frame 12b Second window frame 13 Window body (shoji) 13a First window body (first shoji) 13b Second window body (second shoji) 14 Swivel chain 14a First swivel chain 14b Second swivel chain 15 Rotating mechanism 15a First rotating mechanism 15b Second rotating mechanism 16 Upper frame 17 Lower frame 18 Side frames 19 Rotating end (rotating frame) 20 Free end (swivel frame) 21 Side parts (side frames) 22 Window equipment 23 Shutter fitting 24 Operator for high window 25 Rotating rod 25a First rotating rod 25b Second rotating rod 26 Roller 26a First roller 26b Second roller 27 Ring mounting drum 27a First ring mounting drum 27b Second ring mounting drum 28 First torsion spring 29 Housing unit 29a First housing unit 29b Second housing unit 30 Sprocket 31 Ball chain 32 Bearing plate 34 Second torsion spring 35a First torsional rotation speed adjustment mechanism 35b Second torsional rotation speed adjustment mechanism 36 First rotation transmission plate 37a First rotation plate (first to nth rotation plates) 37b Second rotation plate (first to nth rotation plates) 37c Third rotation plate (first to nth rotation plates) 38 Second rotation transmission plate 39 Central opening 40 Support plate 41a~41e Protrusions (rotation transmission means, rotation passive means) 42a, 42b End faces 43a, 43b End faces 44a, 44b End faces 45a, 45b End faces 46a, 46b End faces 47a, 47b End faces 48 First rotation transmission plate 49a First rotation plate (first to nth rotation plates) 49b Second rotation plate (first to nth rotation plates) 50 Second rotation transmission plate 51 Central opening 52a~52d Protrusions (rotation transmission means, rotation passive means) 53a, 53b End faces 54a, 54b End faces 55a, 55b End faces 56a, 56b End faces 57 Smoke exhaust window 58 Erection unit 59 Idler line 60 Slider 61 Lock mechanism 62 Traction chain (traction member) 63a First erection plate 63b Second erection plate 64 Base plate 65 Cover plate 66a First chain accommodation space (first guide recess) 66b Second chain accommodation space (second guide recess) 67 Upper end 68 Middle part (moving space) 69 Lower end 70 Upper plate 71 Lower plate 72 First connection part 73 Second connection part 74 Adjusting screw 75 Engaging cam 76 Swivel lever (swivel handle) 77 Outer peripheral edge 78 Rotating base end portion 79 Gripping portion (handle) 80 Swivel arm 81 Engagement pin 82a First torsion spring A 82b First torsion spring B

Claims

1. A window opening and closing system comprising: a window body having a free end that pivots vertically about a rotatable end installed rotatably on a window frame; a pivoting bar connected to the free end of the window body to pivot the window body from a closed state to an open state and from the open state to the closed state; and a rotation mechanism that pays out the pivoting bar in one direction to pivot the window body from the closed state to the open state, or winds up the pivoting bar in the other direction to pivot the window body from the open state to the closed state. In this system, the rotation mechanism includes: a rotary rod rotatably installed on the window frame and extending horizontally; a rotation force applying means for rotating the rotary rod in the clockwise or counterclockwise direction; a roller installed on the rotary rod to which the pivoting bar is connected, the roller paying out and winding up the pivoting bar as the rotary rod rotates; and a first torsion spring installed on the rotary rod that develops a torque proportional to the angle of torsion in the direction opposite to the direction of torsion when the rotary rod is twisted in the winding direction or the direction opposite to the winding direction. The window opening and closing system is characterized in that when the rotary rod rotates in the direction of paying out the pivoting bar, the first torsion spring is twisted in the winding direction or the direction opposite to the winding direction, the first torsion spring develops a winding torque in the direction in which the roller winds up the pivoting bar, the rotation of the roller is biased in the winding direction of the pivoting bar by the winding torque of the first torsion spring, and the rotational load acting on the rotary rod when the window body pivots from the open state to the closed state is reduced by the winding torque.

2. In the window opening and closing system according to claim 1, the torque of the first torsion spring is adjusted such that when the free end of the window body pivots downward in the vertical direction to open the window body from the closed state, the free end of the window body automatically pivots downward in the vertical direction by its own weight when the window body is opened.

3. In the window opening and closing system according to claim 1 or claim 2, when the pivoting bar is wound up in the other direction to pivot the window body from the open state to the fully closed state, the torsion of the first torsion spring returns and the winding torque of the first torsion spring disappears.

4. In the window opening and closing system, when the turning strip is wound in the other direction to turn the window body from the open state to the fully closed state, the torsion of the first torsion spring returns, and after the winding torque of the first torsion spring disappears, the first torsion spring is twisted in the winding direction or the direction opposite to the winding direction. In the closed state where the window body is turned to the fully closed position, the roller develops a feeding torque of the first torsion spring in the direction of feeding the turning strip, and the rotation of the roller is biased in the feeding direction of the turning strip by the feeding torque of the first torsion spring. The window opening and closing system according to claim 1 or claim 2, wherein the feeding torque of the first torsion spring acts at the start of turning the window body from the fully closed state to the open state.

5. In the window opening and closing system, when the torsion of the first torsion spring returns at the time point after the start, and the feeding torque of the first torsion spring disappears, and when the rotary rod rotates in the direction of feeding the turning strip from the time point after the start, the first torsion spring is twisted in the winding direction or the direction opposite to the winding direction, and the roller develops a winding torque of the first torsion spring in the direction of winding the turning strip, and the rotation of the roller is biased in the winding direction of the turning strip by the winding torque of the first torsion spring. The window opening and closing system according to claim 4.

6. When the rotating mechanism is installed on the rotating rod and is twisted in the winding direction or the direction opposite to the winding direction, it includes a second torsion spring that generates a torque proportional to the angle of twist in the direction opposite to the twist. In the window opening and closing system, when the rotating rod rotates in the direction of winding up the turning strip and the window main body is rotated from the open state toward the closed position, the second torsion spring is twisted in the winding direction or the direction opposite to the winding direction. When the window main body is in the closed position where it has rotated to the fully closed state, the roller generates a payout torque in the direction in which the second torsion spring pays out the turning strip. The rotation of the roller is biased in the payout direction of the turning strip by the payout torque of the second torsion spring, and the payout torque of the second torsion spring acts at the start when the window main body is rotated from the fully closed state to the open state. The window opening and closing system according to claim 1.

7. The rotating mechanism includes a first adjustment mechanism for the number of torsion rotations of the second torsion spring. In the window opening and closing system, when the window main body is rotated from the fully open state toward the closed position, after the rotating rod rotates the set number of times by the first adjustment mechanism for the number of torsion rotations, the torsion of the second torsion spring starts. The window opening and closing system according to claim 6.

8. The torsional rotation speed first adjustment mechanism is formed by a first rotation transmission plate installed on the rotation rod and rotating in conjunction with the rotation of the rotation rod, and a second rotation transmission plate arranged adjacent to the first rotation transmission plate in the axial direction and installed at one end of the second torsion spring. The first rotation transmission plate has rotation transmission means for transmitting its rotation to the second rotation transmission plate, and the second rotation transmission plate has rotation passive means for receiving the rotation of the first rotation transmission plate. In the torsional rotation speed first adjustment mechanism, when the window body rotates from the fully open state to the closed position and the rotation rod rotates, the first rotation transmission plate rotates, and the rotation of the first rotation transmission plate is transmitted from the rotation transmission means to the second rotation transmission plate through the rotation passive means. When the first rotation transmission plate and the second rotation transmission plate rotate together, the rotation of the rotation rod is transmitted to the second torsion spring, and the torsion of the second torsion spring starts. The window opening and closing system according to claim 7.

9. The torsional rotation speed first adjustment mechanism includes first to nth rotation plates disposed between the first rotation transmission plate and the second rotation transmission plate and arranged adjacent to each other in the axial direction of the first rotation transmission plate. The first to nth rotation plates have rotation receiving means for receiving the rotation of the first rotation transmission plate. In the torsional rotation speed first adjustment mechanism, when the window body pivots from the fully open state to the closed position and the rotation rod rotates, the first rotation transmission plate rotates, and the rotation of the first rotation transmission plate is transmitted from the rotation transmission means to the first rotation plate through the rotation receiving means. Next, while the first rotation transmission plate and the first rotation plate rotate together, the rotation of the first rotation plate is transmitted from the first rotation plate to the second rotation plate through the rotation receiving means. Next, while the first rotation transmission plate and the first and second rotation plates rotate together, the rotation of the second rotation plate is transmitted from the second rotation plate to the third rotation plate through the rotation receiving means. In this way, the rotation of the first to nth rotation plates is sequentially transmitted from the first rotation plate to the nth rotation plate, and after the rotation of the rotation rod is sequentially transmitted from the first rotation transmission plate to the nth rotation plate, the rotation of the nth rotation plate is transmitted to the second rotation transmission plate through the rotation receiving means. The rotation of the rotation rod is transmitted to the second torsion spring through the rotation of the first rotation transmission plate, the first to nth rotation plates, and the second rotation transmission plate together, and the torsion of the second torsion spring starts. The window opening and closing system according to claim 8.

10. The number of the first to nth rotation plates of the torsional rotation speed first adjustment mechanism is determined according to the number of turns of the turning strip around the roller. The window opening and closing system according to claim 9.

11. The rotation mechanism includes a torsional rotation speed second adjustment mechanism for the first torsion spring. In the window opening and closing system, when the window body is pivoted from the fully closed state to the open position, after the rotation rod rotates by the number of times set by the torsional rotation speed second adjustment mechanism, the torsion of the first torsion spring starts. The window opening and closing system according to claim 1.

12. The torsional rotation speed second adjustment mechanism is formed by a first rotation transmission plate installed on the rotation rod and rotating in conjunction with the rotation of the rotation rod, and a second rotation transmission plate arranged adjacent to the first rotation transmission plate in the axial direction and installed at one end of the first torsion spring. The first rotation transmission plate has a rotation transmission means for transmitting its rotation to the second rotation transmission plate, and the second rotation transmission plate has a rotation receiving means for receiving the rotation of the first rotation transmission plate. In the torsional rotation speed second adjustment mechanism, when the window body rotates from the fully closed state to the open position and the rotation rod rotates, the first rotation transmission plate rotates, and the rotation of the first rotation transmission plate is transmitted from the rotation transmission means to the second rotation transmission plate through the rotation receiving means. When the first rotation transmission plate and the second rotation transmission plate rotate together, the rotation of the rotation rod is transmitted to the first torsion spring, and the torsion of the first torsion spring starts. The window opening and closing system according to claim 11.

13. The torsional rotation speed second adjustment mechanism is disposed between the first rotation transmission plate and the second rotation transmission plate and includes first to nth rotation plates arranged adjacent to each other in the axial direction of the first rotation transmission plate. The first to nth rotation plates have rotation receiving means for receiving the rotation of the first rotation transmission plate. In the torsional rotation speed second adjustment mechanism, when the window body pivots from the fully closed state to the open position and the rotary rod rotates, the first rotation transmission plate rotates, and the rotation of the first rotation transmission plate is transmitted from the rotation transmission means to the first rotation plate through the rotation receiving means. Next, while the first rotation transmission plate and the first rotation plate rotate together, the rotation of the first rotation plate is transmitted from the first rotation plate to the second rotation plate through the rotation receiving means. Next, while the first rotation transmission plate and the first and second rotation plates rotate together, the rotation of the second rotation plate is transmitted from the second rotation plate to the third rotation plate through the rotation receiving means. In this way, the rotation of the first to nth rotation plates is sequentially transmitted from the first rotation plate toward the nth rotation plate, and after the rotation of the rotary rod is sequentially transmitted from the first rotation transmission plate toward the nth rotation plate, the rotation of the nth rotation plate is transmitted to the second rotation transmission plate through the rotation receiving means. The rotation of the rotary rod is transmitted to the first torsion spring through the rotation of the first rotation transmission plate, the first to nth rotation plates, and the second rotation transmission plate together, and the torsion of the first torsion spring starts. The window opening and closing system according to claim 12.

14. The number of the first to nth rotation plates of the torsional rotation speed second adjustment mechanism is determined according to the number of turns of the turning strip around the roller. The window opening and closing system according to claim 13.

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