Window opening and closing system

Abstract

To provide a window opening and closing system capable of smoothly rotating a window body from a closed state to easily open it, and smoothly rotating the window body from an open state to easily close it.SOLUTION: A window opening and closing system 10 is configured to: operate a traction chain upward in a vertical direction by sliding a slider 20 upward in the vertical direction from a lower end of a guide line 19; rotate first and second rollers via rotation of a sprocket engaging with the traction chain to feed out the first and second wires in one direction; turn the window bodies 13a, 13b to an open state while imparting turning force to the window bodies 13a, 13b by using kicking-out force of first and second kicking-out springs during initial movement; operate the traction chain downward in the vertical direction by sliding the slider 20 downward in the vertical direction from an upper end of the guide line 19; and turn the window bodies 13a, 13b to a closed state by rotating the first and second rollers via the rotation of the sprocket to pull the first and second wires in the opposite direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a window opening and closing system, and more particularly to a window opening and closing system suitable for use with a smoke exhaust window. [Background technology]

[0002] A window opening and closing device has been disclosed that includes a shoji (window body) displaceably mounted relative to a window frame, and a handle box that opens and closes the shoji (see Patent Document 1). The handle box has a handle that is rotated by an operator when closing the shoji, an opening and closing mechanism that displaces the shoji in the closing direction using the rotational force generated by operating the handle, and a fluid coupling that has an input section to which the rotational force generated by operating the handle is input and that transmits the rotational force to the opening and closing mechanism using the viscous resistance of a viscous fluid. The fluid coupling has a casing that is filled with a viscous fluid and is provided with an output shaft that outputs rotational force to the opening and closing mechanism, and a rotor that is rotatably housed within the casing and rotates upon receiving the rotational force input to the input section. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-190236 Summary of the Invention [Problem to be solved by the invention]

[0004] In the window opening and closing device disclosed in Patent Document 1, when closing an open shoji screen (the window itself), the operator rotates the winding handle in a direction that winds up the wire. Rotating the winding handle requires the operator to rotate the handle multiple times, making the closing operation cumbersome for the operator and requiring time and effort to close an open shoji screen. Furthermore, if the winding handle is installed in a position away from the window and it is difficult to tell whether the window is open or closed while operating the winding handle, it is difficult to know how far the winding handle needs to be rotated to close the shoji screen, and the operator may stop rotating the handle halfway through closing the shoji screen, leaving the screen in an incomplete state.

[0005] An object of the present invention is to provide a window opening and closing system that can easily open a window body by smoothly rotating it from a closed state to an open state without requiring much effort or time, and can easily close the window body by smoothly rotating it from an open state to a closed state. Another object of the present invention is to provide a window opening and closing system that can clearly confirm the closed position of the window body, will not leave the window body in an incompletely closed state, and can reliably close the window body in a complete state. [Means for solving the problem]

[0006] The premise of the present invention to solve the above problem is to provide a window body whose free end pivots in the vertical direction around a rotation end portion rotatably installed on a window frame, and a door lock that is connected to the free end portion of the window body and pivots the window body from a closed state to an open state. At the same time, The window opening and closing system includes a wire for rotating from an open state to a closed state, and a wire operating means for letting out the wire in one direction to rotate the window body from the closed state to the open state, and for pulling the wire in the other direction to rotate the window body from the open state to the closed state.

[0007] The present invention is characterized in that the kick-out means for applying a rotation force to the window body at the initial movement of rotating the window body from the closed state to the open state is installed on either the window frame or the window body, and the wire operating means is provided with a guide line located below the window frame and extending in the vertical direction, a slider that slides in the vertical direction along the guide line, and a wire operating means for connecting the wire operating means to the slider. One end The tow bar moves up and down as the slider slides up and down. chain and towing chain The rotating mechanism rotates in accordance with the up and down movement of the wire, winding up the wire and letting it out. a locking mechanism that applies tension to the traction chain and locks the slider when the slider is slid downward in the vertical direction and positioned at the lower end of the guideline; is formed from The locking mechanism is formed by an engagement cam formed at the lower end of the guideline, and a swivel lever rotatably installed at the lower end of the slider, having an engagement pin at a rotation base end located at the lower end of the slider, with the engagement pin moving along the outer periphery of the engagement cam, and the window opening and closing system moves the slider to the lower end of the guideline, and then rotates the swivel lever either forward or backward to move the engagement pin along the outer periphery of the engagement cam to a predetermined lock position, thereby locking the slider sliding with tension applied to the traction chain, and with the slider sliding locked, rotates the swivel lever either forward or backward to move the engagement pin along the outer periphery of the engagement cam to a predetermined unlock position, thereby enabling the slider to slide. The window opening and closing system is pulled by sliding the slider up and down along the guideline. chain is operated in the up and down direction, the wire is unwound in one direction while rotating the rotation mechanism, and at the initial movement, the kick-out force of the kick-out means is used to apply a rotation force to the window body, causing the window body to rotate from a closed state to an open state, or the slider is slid up and down on the guideline to be pulled. chain The window body is rotated from an open state to a closed state by operating the rotary mechanism in the up and down direction and pulling the wire in the other direction while rotating the rotary mechanism.

[0008] As an example of the present invention, the window opening and closing system is configured to slide the slider upward from the lower end of the guideline in the vertical direction to pull the slider. chain is operated upward in the vertical direction, the wire is unwound in one direction while rotating the rotation mechanism, and at the initial movement, the kick-out force of the kick-out means is used to apply a turning force to the window body, causing the window body to turn from the closed state to the open state, and the slider is slid downward in the vertical direction from the top end of the guide line to be pulled. chain is operated downward in the vertical direction, and the wire is pulled in the other direction while rotating the rotation mechanism, thereby rotating the window body from the open state to the closed state.

[0009] In another example of the present invention, the kick-out means is a kick-out spring that applies a pivoting force to the window body when the free end of the window body initially pivots from the closed position to the open position, the window frame is formed of an upper frame and a lower frame that are spaced apart and extend laterally, and first and second side frames that are spaced apart and extend vertically, and the window body is rotatably installed on the lower frame and has a rotating end that is airtightly attached to the lower frame in the closed state, and a rotating end that is airtightly attached to the upper frame in the closing operation and airtightly attached to the upper frame in the opening operation, and a rotating end that is airtightly attached to the upper frame in the closing operation and airtightly attached to the open position in the vertical downward direction in the opening operation. and first and second side portions extending in the vertical direction and spaced apart laterally opposite each other, and a pair of kick-out springs are installed on the first and second side frames or the first and second side portions, and the window opening and closing system is configured so that when the free end of the window body initially rotates from the closed position to the open position, a rotation force is applied by the repulsive force of the kick-out springs, causing the window body to rotate, and during the rotation process except for the initial movement, the free end of the window body automatically rotates downward in the vertical direction due to the window body's own weight, and before the free end of the window body rotates to the closed position, the free end rotates upward in the vertical direction against the repulsive force of the kick-out springs.

[0010] In another example of the present invention, the rotation mechanism is formed from a rod that is rotatably mounted on the window frame and extends horizontally, a sprocket formed on one side of the rod to which a traction chain engages and that rotates as the traction chain moves up and down, and a roller formed on the other side of the rod to which a wire is connected and that pays out and winds up the wire as the sprocket rotates.

[0011] In another example of the present invention, the rotation mechanism includes a torsion spring that is installed on the other side of the rod and that, when twisted in the winding direction or the opposite direction to the winding direction, generates a torque in the opposite direction proportional to the angle of twist; when the rod rotates in the direction to unwind the wire, the torsion spring twists in the winding direction or the opposite direction to the winding direction, and the torsion spring generates a torque in the direction to pull the wire, and the torque of the torsion spring helps wind the wire onto the roller.

[0012] In another example of the present invention, a window opening and closing system includes an erection unit extending downward from either a first side frame or a second side frame that form a window frame, and a guideline is formed on the erection unit and is located below the window frame, extending in the vertical direction.

[0013] In another example of the present invention, an installation unit is formed from a first guide plate and a second guide plate that face each other and extend in the vertical direction, and a base plate that is located between the first and second guide plates and extends in the vertical direction, and a first chain accommodating space that accommodates a towing chain so that it can move up and down is formed on the side of the first guide plate and extends in the vertical direction, and a second chain accommodating space that accommodates the towing chain so that it can move up and down is formed on the side of the second guide plate and extends in the vertical direction.

[0014] In another example of the present invention, a window opening and closing system includes a stopper that is removably installed at a predetermined location on a guideline and stops the slider from sliding up and down, and by adjusting the installation position of the stopper on the guideline, the window opening and closing system can adjust the vertical sliding distance of the slider from the lower end of the guideline and the downward rotation angle of the free end of the window body from the upper frame.

[0015] In another example of the present invention, a window opening and closing system includes a fixing means that is attached to a slider and fixes the slider to a predetermined position on a guideline, and the window opening and closing system can fix the slider to a predetermined position on the guideline using the fixing means during the process of sliding the slider up and down on the guideline, and can open the window body with the free end of the window body pivoted downward from the upper frame at any angle. [Effects of the Invention]

[0016] According to the window opening and closing system of the present invention, the slider is slid up and down on the guideline to actuate the traction member in the up and down direction, rotating the rotation mechanism and unwinding the wire in one direction, and during the initial movement, the kick-out force of the kick-out means is used to apply a turning force to the window body and turn it from a closed state to an open state, so that the window body can be turned from a closed state to an open state simply by sliding the slider up and down, and the window body can be turned smoothly from a closed state to an open state without requiring much effort or time, and the window body can be easily opened by smoothly turning it from a closed state to an open state. The window opening and closing system according to the present invention, the slider is slid up and down on the guideline to actuate the traction member in the up and down direction, rotating the rotation mechanism and pulling the wire in the other direction, and the window body can be turned from an open state to a closed state simply by sliding the slider up and down, and the window body can be turned smoothly from an open state to a closed state without requiring much effort or time, and the window body can be easily closed by smoothly turning it from an open state to a closed state. The window opening and closing system uses the kicking force of the kicking means to apply a pivoting force to the window body at the initial movement, so when the slider is slid up or down, the window body can be reliably pivoted by the kicking force of the kicking means, and the window body can be reliably opened.When closing an open window body, the window opening and closing system does not require multiple rotations of the winding handle as in conventional technology, but simply slides the slider up or down, and the window body in an open state can be closed in a short time with a simple sliding operation.

[0017] The window opening and closing system in which the slider is slid upward in the vertical direction from the lower end of the guideline to operate the pulling member upward in the vertical direction, the wire is unwound in one direction while rotating the rotation mechanism, and during the initial movement, a turning force is applied to the window body using the kick-out force of the kick-out means to turn the window body from a closed state to an open state, the slider is slid downward in the vertical direction from the upper end of the guideline to operate the pulling member downward in the vertical direction, and the wire is pulled in the other direction while rotating the rotation mechanism to turn the window body from an open state to a closed state, can turn the window body from a closed state to an open state simply by sliding the slider upward or downward, and can easily open the window body by smoothly turning the window body from a closed state to an open state without requiring much effort or time, and can also turn the window body from an open state to a closed state simply by sliding the slider downward in the vertical direction, and can easily close the window body by smoothly turning the window body from an open state to a closed state without requiring much effort or time. When closing an open window body with the window opening and closing system, it is not necessary to rotate the winding handle multiple times as in conventional technology, but it is only necessary to slide the slider downward in the vertical direction, and the open window body can be closed in a short time with a simple sliding operation.

[0018] The kick-out means is a kick-out spring that applies a rotation force to the window body at the initial movement of rotating the free end of the window body from the closed position to the open position, the window frame is formed from an upper frame, a lower frame and first and second side frames, the window body has a rotating end that is rotatably installed on the lower frame, a free end that rotates downward in the vertical direction to the open position, and first and second side parts, a pair of kick-out springs are installed on the first and second side frames of the window frame or the first and second side parts of the window body, and when the free end of the window body initially rotates from the closed position to the open position, a rotation force is applied by the repulsive force of the kick-out springs and the window body rotates, and during the rotation process except for the initial movement, the free end of the window body automatically rotates downward in the vertical direction due to the weight of the window body, A window opening and closing system in which the free ends pivot upward in the vertical direction against the repulsive force of the kick springs before pivoting to the closed position uses the repulsive force of the kick springs to pivot the free end of the window body during the initial movement of pivoting from the closed position to the open position, and the free end of the window body automatically pivots downward in the vertical direction due to the weight of the window body during the pivoting process except for the initial movement, so by utilizing the repulsive force of the kick spring and the weight of the window body, the window body can be reliably pivoted when the slider is slid vertically (upward in the vertical direction), and the window body can be easily opened by smoothly pivoting from the closed state to the open state by sliding the slider vertically (upward in the vertical direction) without requiring effort or time.The window opening and closing system automatically pivots the free end of the window body downward in the vertical direction due to the weight of the window body during the pivoting process except for the initial movement, so that the window body can be opened in one go in an emergency without the need to slide the slider. In the window opening and closing system, the free end of the window body swings upward in the vertical direction against the repulsive forces of the kick-out springs before swinging to the closed position, so that the window body can be smoothly opened by again utilizing the repulsive forces of the kick-out springs at the initial movement when the window body is opened again.

[0019] The window opening and closing system has a traction member that is connected at one end to the slider and moves up and down as the slider slides up and down, and the rotation mechanism is formed from a rod rotatably installed on the window frame, a sprocket that rotates as the traction chain moves up and down, and a roller that pays out and winds up the wire as the sprocket rotates.The slider slides up and down (upward in the vertical direction) from the bottom end of the guideline to operate the traction chain in the vertical direction (upward in the vertical direction), and the operation of the traction chain in the vertical direction (upward in the vertical direction) rotates the sprocket, paying out the wire from the roller and rotating the window body from a closed state to an open state.Therefore, the window body can be rotated from a closed state to an open state simply by sliding the slider up and down (upward in the vertical direction), and the window body can be smoothly rotated from a closed state to an open state without requiring much effort or time, and can be easily opened. In the window opening and closing system, the slider slides vertically (vertically downward) from the top end of the guideline to operate the traction chain vertically (vertically downward), and the vertical operation of the traction chain rotates the sprocket, winding the wire onto the roller and rotating the window body from an open state to a closed state. Therefore, the window body can be rotated from an open state to a closed state simply by sliding the slider vertically (vertically downward), and the window body can be smoothly rotated from an open state to a closed state without requiring much effort or time, and can be easily closed.

[0020] In a window opening and closing system in which the rotation mechanism includes a torsion spring that exerts a torque in the opposite direction proportional to the angle of twist, and when the rod rotates in the direction that pays out the wire, the torsion spring twists in the winding direction or in the direction opposite to the winding direction, and the torsion spring exerts a torque in the direction that pulls the wire (winding direction), and the torque of the torsion spring helps to wind the wire onto the roller, when closing a window body that is in an open state, force is required to slide the slider vertically and downward due to the weight of the window body, but because the torque of the torsion spring helps to wind the wire onto the roller, by using the torsion spring, the slider can be slid vertically and downward without requiring much force, and the window body can be smoothly rotated from an open state to a closed state, making it easy to close the window body.

[0021] A window opening and closing system includes an erection unit extending downward from either a first side frame or a second side frame that form a window frame, and guidelines are formed on the erection unit and are located below the window frame and extend in the vertical direction.By forming the guidelines on the erection unit so that they extend in the vertical direction from below the window frame, the slider is positioned in a position where it is easy to apply force to the slider, and the slider can be easily slid upward or downward in the vertical direction, so that the window body can be smoothly rotated from a closed state to an open state to easily open the window body, and can also be smoothly rotated from an open state to a closed state to easily close the window body.

[0022] A window opening and closing system in which an erection unit is formed from a first guide plate and a second guide plate that face each other and extend in the vertical direction, and a base plate that is located between the first and second guide plates and extends in the vertical direction, a first chain accommodating space that accommodates a traction chain so that it can move up and down is formed on the side of the first guide plate and extends in the vertical direction, and a second chain accommodating space that accommodates the traction chain so that it can move up and down is formed on the side of the second guide plate and extends in the vertical direction, Because the traction chain is accommodated in the first and second chain accommodation spaces so that it can move up and down, the slider is slid up and down on the guideline (the slider is moved up and down from the bottom end of the guideline) to operate the traction chain up and down in the first and second chain accommodation spaces, and the operation of the traction chain rotates the sprocket, unwinding the wire from the roller and rotating the window body from a closed state to an open state.Therefore, the window body can be rotated from a closed state to an open state simply by sliding the slider up and down (up and down), and the window body can be smoothly rotated from a closed state to an open state without requiring much effort or time, and can be easily opened. The window opening and closing system operates the traction chain in the vertical direction in the first and second chain storage spaces by sliding the slider in the vertical direction on the guideline (the slider is moved vertically downward from the top end of the guideline), and the operation of the traction chain rotates the sprocket, winding the wire onto the roller and rotating the window body from an open state to a closed state.Therefore, the window body can be rotated from an open state to a closed state simply by sliding the slider in the vertical direction (vertically downward), and the window body can be smoothly rotated from an open state to a closed state without requiring much effort or time, and can be easily closed.

[0023] A window opening and closing system includes a locking mechanism that applies tension to the traction chain and locks the sliding of the slider when the slider is slid vertically downward and positioned at the bottom end of the guideline.By locking the sliding (up and down movement) of the slider with the locking mechanism, the closed position of the window body can be clearly confirmed, the window body will not be left in an incompletely closed state, and the window body can be reliably closed in a complete state.Because the window opening and closing system locks the sliding of the slider while applying tension to the traction chain, the traction chain will not slacken, the window body can be closed airtightly, and air flow when the window body is closed can be prevented.

[0024] The locking mechanism is formed by an engaging cam formed at the lower end of the guideline, and a swivel lever rotatably installed at the lower end of the slider, having an engaging pin at a rotation base end located at the lower end of the slider, with the engaging pin moving along the outer periphery of the engaging cam, and after the slider is moved to the lower end of the guideline, the swivel lever is rotated in either the forward or reverse direction, and the engaging pin is moved along the outer periphery of the engaging cam to a predetermined locking position, thereby locking the sliding of the slider with tension applied to the traction chain, and with the sliding of the slider locked, the swivel lever is rotated in either the forward or reverse direction, In this window opening / closing system, the slider can be slid by moving the engagement pin along the outer periphery of the engagement cam to a predetermined unlocked position. This system rotates the pivot lever in either the forward or reverse direction at the lower end of the guideline, moving the engagement pin along the outer periphery of the engagement cam to a predetermined locked position, applying tension to the traction chain and locking the slider's sliding (up and down movement). By moving the engagement pin to the locked position, the closed position of the window body can be clearly confirmed, the window body is not left in an incompletely closed state, and the window body can be reliably closed completely. Because the window opening / closing system locks the slider's sliding while applying tension to the traction chain, the traction chain does not slacken, allowing the window body to be closed airtightly and preventing air from passing through when the window body is closed. In this window opening / closing system, the slider's sliding is locked by rotating the pivot lever in either the forward or reverse direction and moving the engagement pin along the outer periphery of the engagement cam to a predetermined unlocked position, thereby unlocking the slider's sliding and facilitating opening of the window body.

[0025] This window opening and closing system includes a stopper that is removably installed at a predetermined location on the guideline and stops the slider from sliding up and down, and by adjusting the installation position of the stopper on the guideline, the distance that the slider slides up and down from the bottom end of the guideline can be adjusted, and the angle at which the rotating end of the window body rotates downward from the upper frame can be adjusted.By adjusting the installation position of the stopper on the guideline, the opening area of ​​the window body when open can be adjusted, and the amount of air flowing through the window body can be adjusted.

[0026] The window opening and closing system includes a fixing means that is attached to the slider and fixes the slider to a predetermined position on the guideline, and the fixing means can be used to fix the slider to the predetermined position on the guideline in the process of sliding the slider up and down on the guideline, and the window body can be opened with the free end of the window body pivoted downward from the upper frame at any angle.By using the fixing means to fix the slider to a predetermined position on the guideline, the window body can be opened with the free end of the window body pivoted downward from the upper frame at any angle, so the fixing means can be used to adjust the opening area of ​​the window body when open and to adjust the amount of air flowing through the window body. [Brief explanation of the drawings]

[0027] [Figure 1] FIG. 1 is a front view of an example window opening and closing system. [Figure 2] FIG. 1 is a top view of a window opening and closing system. [Figure 3] FIG. 4 is a partially enlarged front view showing the window body in an open state. [Figure 4] FIG. 2 is a side view of an example of an installation unit. [Figure 5] Partially enlarged top view of the erection unit. [Figure 6] FIG. [Figure 7] FIG. 10 is a partially enlarged view of the installation unit showing an example of a locking mechanism. [Figure 8] A partial enlarged view of the erection unit, continuing from Figure 7. [Figure 9] FIG. 4 is a partially enlarged top view of a drive unit showing an example of a rotation mechanism. [Figure 10] FIG. 10 is a partially enlarged top view of the drive unit, continuing from FIG. 9. [Figure 11] FIG. 2 is a partially enlarged side view of the window opening and closing system with the window body closed. [Figure 12] 12 is an enlarged partial side view of the window opening and closing system similar to FIG. 11 shown in cross section. [Figure 13] FIG. 2 is a partially enlarged side view of the window opening and closing system with the window body open. [Figure 14] 14 is an enlarged partial side view of the window opening and closing system similar to FIG. 13 shown in cross section. [Figure 15] FIG. 10 is a side view of an installation unit shown as another example. [Figure 16] FIG. 10 is a side view of the installation unit showing the slider in contact with the stopper. [Figure 17] An enlarged partial view of the installation unit showing the slider fixed to a designated location on the guideline by screws. [Figure 18] 18 is a cross-sectional view taken along line AA in FIG. 17. DETAILED DESCRIPTION OF THE INVENTION

[0028] The window opening and closing system according to the present invention will be described in detail below with reference to the accompanying drawings, such as Fig. 1, which is a front view of a window opening and closing system 10 shown as an example. Fig. 2 is a top view of the window opening and closing system 10, and Fig. 3 is a partially enlarged front view showing the window body 13a in an open state. In Figs. 1 and 2, the up-down direction is indicated by arrow X, the lateral direction is indicated by arrow Y, and the front-rear direction is indicated by arrow Z. Fig. 1 shows two first and second window frames 12a, 12b and two first and second window bodies 13a, 13b, but there is no particular limitation on the number of window frames or window bodies; there may be one window frame or window body, or there may be three or more window frames or window bodies.

[0029] The window opening / closing system 10 (smoke exhaust operator) is normally used for air exchange (indoor ventilation) and is used as a smoke exhaust window to exhaust harmful smoke in an emergency (such as in the event of a fire). 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 screen) installed in the first window frame 12a and a second window body 13b (second shoji screen) installed in the second window frame 12b, a first kick-out spring 14a and a second kick-out spring 14b, a first wire 15a that rotates the first window body 13a and a second wire 15b that rotates the second window body 13b, an installation unit 16 (chain box), a first drive unit 17a and a second drive unit 17b, and a chain operating means 18 that operates (reels out or reels in) the wires 15a and 15b.

[0030] The chain operating means 18 is made up of a guideline 19 (slide line), a slider 20, a locking mechanism 21, a traction chain 22 (traction member), a first rotation mechanism 23a, and a second rotation mechanism 23b. The guideline 19, the slider 20, the locking mechanism 21, and the traction chain 22 are installed in the installation unit 16. The first rotation mechanism 23a is installed in the first drive unit 17a (see FIG. 2), and the second rotation mechanism 23b is installed in the second drive unit 17b (see FIG. 2).

[0031] The first window frame 12a and the second window frame 12b are installed at a high position (near the ceiling) of a specified building, and are rectangular with the same shape and size that are long in the horizontal direction, lined up horizontally. The window frames 12a, 12b are made up of an upper frame 24 that is installed near the ceiling and extends straight in the horizontal direction, a lower frame 25 that is installed below the upper frame 24 and extends straight in the horizontal direction, and a first side frame 26a and a second side frame 26b that extend straight in the vertical direction.

[0032] In these window frames 12a, 12b, the upper frame 24 and the lower frame 25 are parallel to each other and face each other at a distance in the vertical direction, and the first side frame 26a and the second side frame 26b are parallel to each other and face each other at a distance in the horizontal direction. In these window frames 12a, 12b, the upper and lower frames 24, 25 and the first and second side frames 26a, 26b define installation spaces for two rectangular windows (shoji screens) of the same shape and size that are elongated in the horizontal direction. There are no particular limitations on the size or shape of the first and second window frames 12a, 12b, and they can be designed freely.

[0033] The upper and lower frames 24, 25 and the first and second side frames 26a, 26b are formed into a generally angled (L-shaped) shape. The upper frame 24 has an upper frame plate 27 located directly above the free ends 37 of the window bodies 13a, 13b and extending laterally, and an upper abutment plate 28 extending laterally perpendicular to the upper frame plate 27 and airtightly abutting against the rear surfaces of the free ends 37 of the window bodies 13a, 13b. The lower frame 25 has a lower frame plate 29 located directly below the rotating ends 36 of the window bodies 13a, 13b and extending laterally, and a lower abutment plate 30 extending laterally perpendicular to the lower frame plate 29 and airtightly abutting against the rear surfaces of the rotating ends 36 of the window bodies 13a, 13b.

[0034] The first side frame 26a has a first side frame plate 31 located on the side of the first side portion 38a of the window bodies 13a, 13b and extending in the vertical direction, and a first abutment plate 32 extending in the vertical direction perpendicular to the first side frame plate 31 and airtightly abutting against the rear surface of the first side portion 38a of the window bodies 13a, 13b. The second side frame 26b has a second side frame plate 33 located on the side of the second side portion 38b of the window bodies 13a, 13b and extending in the vertical direction, and a second abutment plate 34 extending in the vertical direction perpendicular to the second side frame plate 33 and airtightly abutting against the rear surface of the second side portion 38b of the window bodies 13a, 13b.

[0035] The first and second window frames 12a, 12b use resin sashes, aluminum sashes, or aluminum-resin composite sashes, and these window frames 12a, 12b are connected to the wall and to each other by existing connection means. An openable window fixture 35, which is made of glass (glass shoji) fitted into a window frame, is installed directly below the first and second window frames 12a, 12b (first and second window bodies 13a, 13b). The window frames 12a, 12b and the window fixture 35 are connected by existing connection means. Note that a wall may be installed directly below the first and second window frames 12a, 12b (first and second window bodies 13a, 13b).

[0036] The first and second window bodies 13a, 13b (shoji screens) are pivotally attached to the first and second window frames 12a, 12b, and are rectangular with the same shape and size, elongated horizontally, lined up horizontally. The first and second window bodies 13a, 13b pivot from a closed state (closed position) to an open state (fully open position), and also pivot from the open state to the closed state. There are no particular limitations on the size or shape of the first and second window bodies 13a, 13b, and they can be freely designed according to the size and shape of the first and second window frames 12a, 12b.

[0037] The window bodies 13a, 13b have rotating end portions 36 (rotating frames) that are rotatably connected (installed) to the lower frames 25 of the window frames 12a, 12b and extend straight in the horizontal direction, free end portions 37 (swivel frames) that extend straight in the horizontal direction and spaced apart upward from the rotating end portions 36, and first side portions 38a (first side frames 38a) and second side portions 38b (second side frames 38b) that extend straight in the up-down direction and spaced apart opposite each other in the horizontal direction. A shoji metal fitting 39 is installed and fixed in the horizontal center of the free end portions 37.

[0038] When the window bodies 13a, 13b are closed (in the closed position), the rotating end 36 is in airtight contact with the lower abutment plate 30 of the lower frame 25, and the first and second side portions 38a, 38b are in airtight contact with the first and second abutment plates 32, 34 of the first and second side frames 26a, 26b. When the window bodies 13a, 13b are closed, the free end 37 pivots to a closed position where it is in airtight contact with the upper abutment plate 28 of the upper frame 24, and when the window bodies 13a, 13b are closed, it pivots to a fully open position downward in the vertical direction. Glass is fitted into the window bodies 13a, 13b (the rotating end 36, free end 37, and the inside of the first and second side portions 38a, 38b). The rotating end 36, free end 37, and first and second side portions 38a, 38b are made of a resin sash, an aluminum sash, or an aluminum-resin composite sash.

[0039] The first kick spring 14a (kick-out means) is installed on the first side portion 38a of the window main body 13a, 13b and extends in the vertical direction. The second kick-out spring 14b (kick-out means) is installed on the second side portion 38b of the window main body 13a, 13b and extends in the vertical direction. The upper ends 40 of the kick-out springs 14a, 14b are connected to the upper ends of the first and second side portions 38a, 38b by a predetermined connecting means. The kick-out springs 14a, 14b are inclined downward toward the rear in the front-to-rear direction so as to gradually move away from the first and second side portions 38a, 38b from the upper end 40 toward the lower end 41. The lower ends 41 of the kick-out springs 14a, 14b may also be connected to the lower ends of the first and second side portions 38a, 38b by a predetermined connecting means. In this case, the kick-out springs 14a, 14b are inclined upwardly rearward in the front-rear direction so as to gradually move away from the first and second side portions 38a, 38b from the lower end portion 41 toward the upper end portion 40 thereof.

[0040] When the window bodies 13a, 13b are in the closed state, the kick-out springs 14a, 14b are in close contact with the first and second abutment plates 32, 34 of the first and second side frames 26a, 26b, and the repulsive forces of the kick-out springs 14a, 14b act on the first and second abutment plates 32, 34. The repulsive forces of the kick-out springs 14a, 14b apply a pivoting force to the free end portions 37 of the window bodies 13a, 13b when the free end portions 37 of the window bodies 13a, 13b initially pivot from the closed position to the open position.

[0041] The first kick springs 14a (kick-out means) may be attached to the first abutment plates 32 of the first side frames 26a of the first and second window frames 12a, 12b and extend in the vertical direction, and the second kick-out springs 14b (kick-out means) may be attached to the second abutment plates 34 of the second side frames 26b of the first and second window frames 12a, 12b and extend in the vertical direction. In this case, the upper ends 40 of the kick-out springs 14a, 14b are connected to the upper ends of the first and second abutment plates 32, 34 by predetermined connecting means, and the kick-out springs are inclined downwardly forward in the front-to-rear direction so as to gradually move away from the first and second abutment plates 32, 34 of the first and second side frames 26a, 26b as they extend from their upper ends 40 toward their lower ends 41. Alternatively, the lower ends 41 of the kick-off springs 14a, 14b are connected to the lower ends of the first and second abutment plates 32, 34 by a predetermined connecting means, and as the kick-off springs move from their lower ends 41 toward their upper ends 40, they incline upwardly in the forward and backward direction so as to gradually move away from the first and second abutment plates 32, 34 of the first and second side frames 26a, 26b.

[0042] When the window bodies 13a, 13b are closed, the kick springs 14a, 14b are in close contact with the first and second side portions 38a, 38b of the window bodies 13a, 13b, and the repulsive forces of the kick springs 14a, 14b act on the first and second side portions 38a, 38b. As in the case where the kick springs 14a, 14b are installed on the first and second side portions 38a, 38b, the repulsive forces of the kick springs (kick-out means) impart a rotating force to the free end portion 37 of the window bodies 13a, 13b when the free end portion 37 initially rotates.

[0043] The first and second wires 15a, 15b are made of stainless steel wire, galvanized steel wire, copper wire, brass wire, pure silver wire, etc. The tip of the first wire 15a is connected to a sliding door fitting 39 at the free end 37 of the first window body 13a, and the tip of the second wire 15b is connected to a sliding door fitting 39 at the free end 37 of the second window body 13b. The wires 15a, 15b rotate the first and second window bodies 13a, 13b from a closed state to an open state, and also rotate the window bodies 13a, 13b from an open state to a closed state.

[0044] In the window opening and closing system 10, when the first and second wires 15a, 15b are unwound in one direction (forward in the front-to-rear direction), the free ends 37 of the first and second window bodies 13a, 13b, which are in airtight contact with the upper frame 24, rotate downward in the vertical direction around the rotating ends 36, and the window bodies 13a, 13b rotate from a closed state (closed position) to an open state (fully open position) (see FIG. 13). The downward rotation angle of the window bodies 13a, 13b in the vertical direction varies depending on the unwound dimensions of the first and second wires 15a, 15b, and by adjusting the unwound dimensions of the wires 15a, 15b, the open area of ​​the window bodies 13a, 13b when open can be adjusted. In the window opening and closing system 10, when the first and second wires 15a, 15b are pulled in the other direction (rearward in the front-to-rear direction), the free ends 37 of the first and second window bodies 13a, 13b, which have rotated downward in the vertical direction, rotate upward in the vertical direction around the rotating end 36, and the window bodies 13a, 13b rotate from an open state (fully open position) to a closed state (closed position) (see Figure 11).

[0045] FIG. 4 is a side view of an example of the installation unit 16, and FIG. 5 is a partially enlarged top view of the installation unit 16. FIG. 6 is a partially enlarged perspective view of the installation unit 16, and FIG. 7 is a partially enlarged view of the installation unit 16 showing an example of the locking mechanism 21. FIG. 8 is a partially enlarged view of the installation unit 16 continuing from FIG. 7, and FIG. 9 is a partially enlarged top view of the drive units 17a and 17b showing an example of the rotation mechanisms 23a and 23b. FIG. 10 is a partially enlarged top view of the drive units 17a and 17b continuing from FIG. 4. In FIG. 4, the cover plate 45 of the installation unit 16 is shown in a cutaway view. The engagement cam 72 is not shown in FIG. 6. The window bodies 13a and 13b are not shown in FIGS. 9 and 10.

[0046] The installation unit 16 is made of metal such as aluminum, stainless steel, or other alloy, or synthetic resin, and extends linearly downward from the second side frame 26b of the first window frame 12a. Note that the installation unit 16 may extend linearly downward from the first side frame 26a of the first window frame 12a, or the installation unit 16 may extend linearly downward from the first side frame 26a of the second window frame 12b. Furthermore, the installation unit 17 may extend linearly downward from the second side frame 26b of the second window frame 12b.

[0047] The installation unit 16 is formed from a first installation plate 42 and a second installation plate 43 of the same shape and size that face each other in the front-to-rear direction and extend in the vertical direction, a base plate 44 and a cover plate 45 that are located between the first and second installation plates 42, 43 and extend in the vertical direction perpendicular to the installation plates 42, 43, a first chain accommodating space 46 (first guide recess) that is located on the side of the first installation plate 42 and extends in the vertical direction parallel to the first installation plate 42, and a second chain accommodating space 47 (second guide recess) that is located on the side of the second installation plate 43 and extends in the vertical direction parallel to the second installation plate 43.

[0048] In the erection unit 16, the first and second erection plates 42, 43 and the base plate 44 are integrally molded, and the cross section thereof is formed in a U-shape. In the erection unit 16, a long storage space 48 is defined in the vertical direction and surrounded by the plates 42 to 44. In the erection unit 16, a cover plate 45 is detachably attached to the first and second erection plates 42, 43 extending upward from the upper end 61 of the guide line 19, and covers the storage space 48 of the erection unit 16. In the erection unit 16, the first erection plate 42 is connected and fixed to the second side frame 26a of the first window frame 12a and the window frame of the window equipment 35 by predetermined connecting means (brackets, bolts and nuts, rivets, welding, etc.).

[0049] The first chain accommodating space 46 (first guide recess) is formed by a first guide plate 49 extending vertically adjacent to the first installation plate 42, a second guide plate 50 extending vertically away from the first guide plate 49 toward the second installation plate 43, and a first guide base plate 51 positioned between the first and second guide plates 49, 50 and extending vertically. The first and second guide plates 49, 50 are formed in an angled (L-shaped) shape. The first and second guide plates 49, 50 and the first guide base plate 51 are accommodated in an accommodation space 48 of the installation unit 16, and the first guide base plate 51 is connected and fixed to the base plate 44 of the installation unit 16 by predetermined connecting means (bolts and nuts, rivets, welding, etc.). The traction chain 22 is accommodated in the first chain accommodating space 46 so as to be vertically movable (slidable).

[0050] The second chain accommodating space 47 (second guide recess) is formed by a third guide plate 52 extending in the vertical direction adjacent to the second mounting plate 43, a fourth guide plate 53 extending in the vertical direction away from the third guide plate 52 toward the first mounting plate 42, and a second guide base plate 54 positioned between the third and fourth guide plates 52, 53 and extending in the vertical direction.

[0051] The third and fourth guide plates 52, 53 are formed in an angled (L-shaped) shape. The third and fourth guide plates 52, 53 and the second guide base plate 54 are housed in the housing space 48 of the installation unit 16, and the second guide base plate 54 is connected and fixed to the base plate 44 of the installation unit 16 by a predetermined connecting means (bolts and nuts, rivets, welding, etc.). The traction chain 22 is housed in the second chain housing space 47 so as to be movable (slidable) up and down. The second guide plate 50 of the first chain housing space 46 and the fourth guide plate 53 of the second chain housing space 47 are connected by a connecting plate 55, so that the first chain housing space 46 and the second chain housing space 47 are integrally connected.

[0052] The first and second drive units 17a, 17b are made of metal such as aluminum, stainless steel, or another alloy, and are arranged on the upper frame 24 of the horizontally aligned (adjacent) window frames 12a, 12b, extending linearly in the horizontal direction. The drive units 17a, 17b are formed from a first plate 56 and a third plate 58 that extend horizontally facing each other in the front-to-rear direction, a second plate 57 that is located between the first and third plates 56, 58 and extends horizontally perpendicular to the plates 56, 58, and bearing plates 59 that are located on the sides and in the middle of the drive units 17a, 17b.

[0053] In the first and second drive units 17a, 17b, the first to third plates 56-58 are integrally molded and have a U-shaped cross section. In the drive units 17a, 17b, first and second housing spaces 60a, 60b are defined that are long in the horizontal direction and surrounded by the first to third plates 56-58. In the first and second drive units 17a, 17b, the first plate 56 is connected and fixed to the upper frame 24 of the window frames 12a, 12b by a predetermined connecting means (brackets, bolts and nuts, rivets, welding, etc.).

[0054] The guide line 19 is formed on the installation unit 15, positioned below the window bodies 13a, 13b (first and second window frames 12a, 12b), and extends downward from the second side frame 26b that forms the first window frame 12a. The guide line 19 may extend downward from the second side frame 26b of the second window frame 12b, or from the first side frame 26a of the first window frame 12a or the second window frame 12b. The vertical length of the guide line 19 can be adjusted (changed) as desired, and the height can be set to facilitate vertical movement of the slider 20 (a height at which the slider 20 can be easily moved up and down with minimal force). The guide line 19 has an upper end 61 (the lower end of the cover plate 45) located on the window bodies 13a, 13b side, a lower end 63 located on the ground side, and an intermediate portion 62 (movement space) that extends vertically between the upper end 61 and the lower end 63.

[0055] The slider 20 is made of a metal such as aluminum, stainless steel, or another alloy, and is formed from an upper plate 64 shaped like a long, generally plate extending in the vertical direction, and a lower plate 65 shaped like a long, generally plate extending in the vertical direction and positioned below the upper plate 64. The slider 20 is disposed in an intermediate portion 62 (movement space) of the guideline 19, and by sliding up and down in the first chain accommodating space 46 (first guide recess), the slider 20 slides up and down in the intermediate portion 62 (the central area of ​​the installation unit 16 in the vertical direction) from the lower end 63 to the upper end 61 of the guideline 19, and also slides down and up in the intermediate portion 62 (the central area of ​​the installation unit 16 in the vertical direction) from the upper end 61 to the lower end 63 of the guideline 19.

[0056] One end 66 of the traction chain 22 is connected to the upper end of the upper plate 64. A first connecting portion 67, which extends in the front-to-rear direction perpendicular to the plate 64, is integrally formed with the lower end of the upper plate 64. A second connecting portion 68, which extends in the front-to-rear direction perpendicular to the plate 65 and faces the first connecting portion 67, is integrally formed with the upper end of the lower plate 65. The first and second connecting portions 67, 68 are formed with screw holes 69 (screw holes) into which the threaded portions of adjustment screws, which will be described later, are threadedly attached.

[0057] An adjustment screw 70 is installed on the first connecting portion 67 of the upper plate 64 and the second connecting portion 68 of the lower plate 65 to adjust the vertical separation dimension between these plates 64, 65. The threaded portion 71 of the adjustment screw 70 is threaded into the threaded holes 69 (screw holes) of the first and second connecting portions 67, 68. A nut is threaded onto the threaded portion 71 of the adjustment screw 70.

[0058] For example, by rotating the adjustment screw 70 clockwise (forward), the first connecting portion 67 and the second connecting portion 68 gradually move closer to each other, thereby shortening the vertical separation dimension between the upper plate 64 and the lower plate 65; and by rotating the adjustment screw 70 counterclockwise (reverse), the first connecting portion 67 and the second connecting portion 68 gradually move farther apart, thereby lengthening the vertical separation dimension between the upper plate 64 and the lower plate 65.

[0059] Although not shown, a sliding top (not shown) may be fixed to the underside of the slider 20. In this case, the sliding top is slidably inserted (engaged) into the first chain accommodating space 46 (first guide recess) of the installation unit 16, and the slider 20 is disposed in the intermediate portion 62 (movement space) of the guideline 19. As the sliding top slides up and down in the first chain accommodating space 46, the slider 20 slides up and down in the intermediate portion 62 (the central area in the vertical direction of the installation unit 16) from the lower end 63 to the upper end 61 of the guideline 19, and the slider 20 slides down and up in the intermediate portion 62 from the upper end 61 to the lower end 63 of the guideline 17.

[0060] Note that guide rails (guide grooves) may be formed in the first guide plate 49 and the fourth guide plate 53 extending in an intermediate portion 62 of the guide line 19 (the central area in the vertical direction of the erection unit 16), and one side edge of the slider 20 may be slidably engaged in the guide rail (guide groove) formed in the first guide plate 49, and the other side edge of the slider 20 may be slidably engaged in the guide rail (guide groove) formed in the fourth guide plate 53. By slidably engaging one side edge and the other side edge of the slider 20 in the guide rail (guide line 19), the slider 20 slides upward in the vertical direction along the intermediate portion 62 from the lower end 63 to the upper end 61 of the guide rail, and the slider 20 slides downward in the vertical direction along the intermediate portion 62 from the upper end 61 to the lower end 63 of the guide rail.

[0061] The locking mechanism 21 applies a predetermined tension to the traction chain 22 and locks the sliding (up and down movement) of the slider 20 when the slider 20 is slid downward in the vertical direction and positioned at the lower end 63 of the guideline 19. The locking mechanism 21 is formed from an engagement cam 72 (flat cam) and a swivel lever 73 (swivel handle) made of metal such as aluminum, stainless steel, or other alloy.

[0062] The engagement cam 72 is disposed at the lower end 63 of the guide line 19 of the erection unit 16, and is connected (fixed) to the lower end 63 of the guide line 19 (the lower end of the first and second erection plates 42, 43 and the base plate 44 of the erection unit 16) by a predetermined connecting means (bolts, rivets, welding, etc.). The engagement cam 72 has an outer peripheral edge 75 that slopes downward in the vertical direction. The outer peripheral edge 75 may also describe an arc that extends downward in the vertical direction.

[0063] The swivel lever 73 is installed at the lower end of the lower plate 65 of the slider 20 and is formed by a rotation base end 76 and a grip portion 77 (handle). The rotation base end 76 is rotatably attached to the lower end of the lower plate 65. The grip portion 77 of the swivel lever 73 rotates (turns) around the rotation base end 76 in the rotation direction (front-to-back direction) of the window body 13a (clockwise or counterclockwise). A rotation arm 78 is integrally formed (connected) with (extends outward from) the side edge of the rotation base end 76 of the grip portion 77 (handle). The rotation arm 78 has an engagement pin 79 formed on it that protrudes toward the base plate 44 of the installation unit 16. The engagement pin 79 engages with the engagement cam 72 in a disengageable manner.

[0064] When the gripping portion 77 (the swivel lever 73) of the swivel arm 78 is swung counterclockwise, the tip 80 of the swivel arm 78 abuts against the inner surface of the second installation plate 43 of the installation unit 16, stopping the gripping portion 77 from rotating further in the counterclockwise direction. The counterclockwise rotation range of the gripping portion 77 (the swivel lever 73) can be adjusted by adjusting the lateral (outward) extension dimension of the swivel arm 78. Adjusting the counterclockwise rotation range of the gripping portion 77 can prevent the swivel arm 78 from rotating counterclockwise more than necessary, thereby improving the operability of the slider 20 with the swivel lever 73.

[0065] The engagement pin 79 pivots (rotates) together with the pivot arm 78 in the pivot direction (front-to-back direction) (clockwise or counterclockwise) of the window body 13a as the gripping portion 77 (rotation lever 73) pivots (rotates). In the pivoting lever 73, the engagement pin 79 slidably moves on the outer peripheral edge 75 of the engagement cam 72. When a pivoting force is applied to the gripping portion 77 (handle) while pressing (pushing down) the gripping portion 77 (rotation lever 73) vertically, the engagement pin 79 slides (rides over) the outer peripheral edge 75 of the engagement cam 72 in one direction and can also slide (ride over) the outer peripheral edge 75 of the engagement cam 72 in the other direction. The engagement pin 79 engages with the engagement cam 72 after moving (riding over) the outer peripheral edge 75 of the engagement cam 72 in one direction.

[0066] In the window opening / closing system 10, the position of the engagement pin 79 relative to the outer peripheral edge 74 of the engagement cam 72 is adjusted so that the engagement pin 79 can slide (ride over) the outer peripheral edge 75 in one direction or the other. By rotating the adjustment screw 70 of the slider 20 counterclockwise (reverse direction) to increase the vertical separation between the upper plate 64 and the lower plate 65, the tension acting on the traction chain 22 can be reduced while allowing the engagement pin 79 of the pivot lever 73 to easily slide (ride over) the outer peripheral edge 75 of the engagement cam 72 in one direction or the other. By rotating the adjustment screw 70 of the slider 20 clockwise (forward direction) to decrease the vertical separation between the upper plate 64 and the lower plate 65, the tension acting on the traction chain 22 can be increased, but it requires more force to cause the engagement pin 79 of the pivot lever 73 to slide (ride over) the outer peripheral edge 75 of the engagement cam 72 in one direction or the other. By adjusting the vertical distance between the upper plate 64 and the lower plate 65, the tension acting on the traction chain 22 can be increased or decreased, thereby adjusting the degree of contact of the free end 37 with the upper abutment plate 28 when the first and second window bodies 13a, 13b are in the closed state, and adjusting the airtightness of the window opening and closing system 10 when in the closed state.

[0067] In the window opening and closing system 10, by using the adjustment screw 70 to adjust the vertical distance between the upper plate 64 and the lower plate 65, it is possible to apply optimal tension to the traction chain 22 when locking the sliding (up and down movement) of the slider 20, and also to enable the engagement pin 79 of the swivel lever 73 to slide (overcome) the outer peripheral edge 75 of the engagement cam 72 in one direction or the other with an appropriate force.

[0068] The traction chain 22 (traction member) is made of metal such as steel, stainless steel, or titanium, and extends in the vertical direction while being housed in the first chain accommodating space 46 (first guide recess) and the second chain accommodating space 47 (second guide recess) with one end 66 connected to the upper end of the upper plate 64 of the slider 20. The traction chain 22 moves up and down in the first chain accommodating space 46 and the second chain accommodating space 47 as the slider 20 slides up and down (moves up and down). The other end 81 (free end) of the traction chain 22 is located in the second chain accommodating space 47 (second guide recess) and hangs down from a sprocket 83, which will be described later.

[0069] When the slider 20 slides upward in the vertical direction in the middle portion 62 (the central area in the vertical direction of the installation unit 16) from the lower end 63 to the upper end 61 of the guideline 19, one end 66 of the traction chain 22 moves upward in the vertical direction in conjunction with this, and the entire traction chain 22 operates in the vertical direction. When the slider 20 slides downward in the middle portion 62 from the upper end 61 to the lower end 63 of the guideline 19 in the vertical direction, one end 66 of the traction chain 22 moves downward in the vertical direction in conjunction with this, and the entire traction chain 22 operates in the vertical direction.

[0070] The first and second rotation mechanisms 23a, 23b are linked to the up and down movement of the traction chain 22 caused by the up and down sliding of the slider 20, and pay out the first and second wires 15a, 15b in one direction (forward in the front-to-rear direction) and take up (wind up) the wires 15a, 15b in the other direction (rear in the front-to-rear direction). The first rotation mechanism 23a is formed by a first rod 82a, a sprocket 83, a first roller 84a, a first ring mounting drum 85a, and a first torsion spring 86a. The first rod 82a, sprocket 83, first roller 84a, first ring mounting drum 85a, and first torsion spring 86a are installed (housed) in the first housing space 60a of the first drive unit 17a.

[0071] The second rotation mechanism 23b is formed by a second rod 82b, a second roller 84b, a second ring mounting drum 85b, and a second torsion spring 86b. The second rod 82b, the second roller 84b, the second ring mounting drum 85b, and the second torsion spring 86b are installed (housed) in the second housing space 60b of the second drive unit 17b.

[0072] The first and second rods 82a, 82b are made of metal such as aluminum, stainless steel, or other alloys, or synthetic resin, and are formed into a cylindrical shape. The first and second rods 82a, 82b are rotatably housed in the first and second housing spaces 60a, 60b of the first and second drive units 17a, 17b (rotatably installed on the window frames 12a, 12b) and extend in the horizontal direction.

[0073] The first rod 82a has one end and an intermediate portion rotatably supported by the bearing plate 59 of the first drive unit 17a. The second rod 82b has one end and an intermediate portion rotatably supported by the bearing plate 59 of the second drive unit 17b. The first and second rods 82a, 82b are connected at their other ends and integrated. Therefore, when one of the first and second rods 82a, 82b rotates clockwise (forward), the other also rotates clockwise (forward), and when one rotates counterclockwise (reverse), the other also rotates counterclockwise (reverse).

[0074] The sprocket 83 is made of a metal such as carbon steel, rolled steel, stainless steel, or sintered alloy, or a synthetic resin, and is attached to the other end of the first rod 82a. The traction chain 22 engages with the teeth of the sprocket 83. The sprocket 83 rotates clockwise (forward direction) or counterclockwise (reverse direction) in accordance with the up and down movement of the traction chain 22, transmitting a rotational force to the first and second rods 82a and 82b.

[0075] The outer diameter of the sprocket 83 is adjustable. Under the condition that the peripheral speed of the sprocket 83 (speed of the slider 20) is the same, by increasing the outer diameter of the sprocket 83, the ratio of the diameter of the sprocket 83 to the diameters of the first and second rods 82a, 82b increases, and the force required to pivot the window bodies 13a, 13b upward in the vertical direction from the open state to the closed state (the force pushing the slider downward) becomes smaller, whereas the total number of rotations of the first and second rods 82a, 82b required to change the window bodies 13a, 13b from the open state to the closed state remains unchanged, so that the vertical movement distance of the slider 20 increases by the amount that the outer diameter of the sprocket 83 is increased. Conversely, by reducing the outer diameter of the sprocket 83, the ratio of the diameter of the sprocket 83 to the diameter of the first and second rods 82a, 82b becomes smaller, and the force (the force pushing the slider downward) when rotating the window bodies 13a, 13b upward in the vertical direction from the open state to the closed state becomes larger, but the vertical movement dimension of the slider 20 becomes shorter.

[0076] In the window opening / closing system 10, by increasing the outer diameter of the sprocket 83, the vertical movement dimension of the slider 20 between the closed state and the open state of the first and second window bodies 13a, 13b increases, but the slider 20 can be slid up and down in the vertical direction without requiring a large force, and the window bodies 13a, 13b can be easily rotated from the closed state to the open state, and the window bodies 13a, 13b can be easily rotated from the open state to the closed state.

[0077] By reducing the outer diameter of the sprocket 83, the window opening / closing system 10 requires force to slide the slider 20 upward or downward in the vertical direction, but the vertical movement dimension (sliding distance) of the slider 20 between the closed state and the open state of the first and second window bodies 13a, 13b can be reduced, and the window bodies 13a, 13b can be rotated from the closed state to the open state and from the open state to the closed state by simply sliding the slider 20 a short distance.

[0078] The first and second rollers 84a, 84b are made of synthetic resin or metal such as aluminum, stainless steel, or other alloys and are formed into a cylindrical shape. The first roller 84a is housed in the first housing space 60a of the first drive unit 17a and is installed (fitted) in the middle of the first rod 82a. The second roller 84b is housed in the second housing space 60b of the second drive unit 17b and is installed (fitted) in the middle of the second rod 82b.

[0079] The first roller 84a rotates clockwise (forward) or counterclockwise (reverse) in accordance with the rotation of the first rod 82a, and the second roller 84b rotates clockwise (forward) or counterclockwise (reverse) in accordance with the rotation of the second rod 82b. The other end of the first wire 15a is connected and fixed to the first roller 84a, and the other end of the second wire 15b is connected and fixed to the second roller 84b.

[0080] When the sprocket 83 is viewed from the other end of the first rod 82a, the first roller 84a rotates counterclockwise, causing the first roller 84a to pull the first wire 15a in the other direction (rearward in the front-to-rear direction) as shown in FIG. 9. When the first roller 84b rotates clockwise, the first wire 15a is paid out in one direction (forward in the front-to-rear direction) from the first roller 84b as shown in FIG. 10. When the sprocket 83 is viewed from the other end of the second rod 82b, the second roller 84b rotates clockwise, causing the second roller 84b to pull the second wire 15b in the other direction (rearward in the front-to-rear direction). When the second roller 84b rotates counterclockwise, the second wire 15b is paid out in one direction (forward in the front-to-rear direction) from the second roller 84b.

[0081] The first and second ring mounting drums 85a, 85b are made of synthetic resin or metal such as aluminum, stainless steel, or other alloys and are formed into a cylindrical shape. The first ring mounting drum 85a is housed in the first housing space 60a of the first drive unit 17a and is installed (fitted) on one end side of the first rod 82a (laterally outward from the first roller 84a). The second ring mounting drum 85b is housed in the second housing space 60b of the second drive unit 17b and is installed (fitted) on one end side of the second rod 82b (laterally outward from the second roller 84b).

[0082] Depending on the size and shape of the window bodies 13a, 13b, the first ring mounting drum 86a may be installed (fitted) in the middle of the first rod 82a, and the first roller 84a may be installed (fitted) on one end side of the first rod 82a (laterally outward from the first ring mounting drum 86a). The second ring mounting drum 86b may be installed (fitted) in the middle of the second rod 82b, and the second roller 84b may be installed (fitted) on one end side of the second rod 82b (laterally outward from the second ring mounting drum 86b).

[0083] The first and second torsion springs 86a, 86b are made of hard steel wire, stainless steel wire, or spring phosphor bronze. The first torsion spring 86a is attached to the first ring mounting drum 85a and extends in the axial direction of the first rod 82a. The second torsion spring 86b is attached to the second ring mounting drum 85b and extends in the axial direction of the second rod 82b. The arm shapes of the torsion springs 86a, 86b can be short hook, straight, single-stage bent, or other shapes. The outer diameter, inner diameter, and number of coils of the torsion springs 86a, 86b can be set as desired depending on the torque required to rotate the first and second window bodies 13a, 13b (shōji screens) upward and downward (the auxiliary force required to slide the slider 20 downward and upward).

[0084] In the first rotation mechanism 23a, with the first ring mounting drum 85a inserted into the first torsion spring 86a, the fixed point of the arm of the first torsion spring 86a is connected and fixed to one of the first to third plates 56 to 58 or the bearing plate 59 of the first drive unit 17a, and the load point of the arm of the first torsion spring 86a is connected and fixed to the outer peripheral edge of the first rod 82a.

[0085] In the second rotation mechanism 23b, with the second ring mounting drum 85b inserted into the second torsion spring 86b, the fixed point of the arm of the second torsion spring 86b is connected and fixed to one of the first to third plates 56 to 58 or the bearing plate 59 of the second drive unit 17b, and the load point of the arm of the second torsion spring 86b is connected (fixed) to the outer peripheral edge of the second rod 82b.

[0086] When the first and second rods 82a and 82b rotate clockwise and the first and second wires 15a and 15b are unwound in one direction (forward in the front-to-rear direction) from the first and second rollers 84a and 84b, the first and second torsion springs 86a and 86b twist in the winding direction or in the direction opposite to the winding direction. When the first and second torsion springs 86a and 86b twist in the direction opposite to the winding direction, they exert a torque (repulsive force) in the opposite direction (winding direction) proportional to the twist angle, and when they twist in the winding direction, they exert a torque (repulsive force) in the opposite direction (opposite to the winding direction) proportional to the twist angle. In the window opening / closing system 10, the torque (repulsive force) of the first and second torsion springs 86a and 86b is adjusted so that the load acting on the slider 20 when the window bodies 13a and 13b are pivoted from bottom to top in the vertical direction is approximately 1.5 to 2 kg.

[0087] Fig. 11 is a partially enlarged side view of the window opening and closing system 10 with the window bodies 13a and 13b closed, and Fig. 12 is a partially enlarged side view of the window opening and closing system 10 similar to Fig. 11 but shown in cross section. Fig. 13 is a partially enlarged side view of the window opening and closing system 10 with the window bodies 13a and 13b open, and Fig. 14 is a partially enlarged side view of the window opening and closing system 10 similar to Fig. 13 but shown in cross section. Figs. 12 and 14 show the traction chain 22 (tracing member) in an exposed state.

[0088] An example of a procedure for opening the first and second window bodies 13a, 13b by rotating the free ends 37 of the window bodies 13a, 13b downward in the vertical direction from a closed state is as follows. The window opening / closing system 10 is manually operated by a person entering or exiting a building in which the system is installed. Note that when the first and second window bodies 13a, 13b are closed, the first and second wires 15a, 15b are pulled (wound) in the other direction (rearward in the front-to-rear direction) by the first and second rollers 84a, 84b, the free ends 37 of the window bodies 13a, 13b rotate to the closed position, the rotating ends 36 are in airtight contact with the lower frame 25, the first and second side portions 38a, 38b are in airtight contact with the first and second side frames 26a, 26b, and the free ends 37 are in airtight contact with the upper frame 24.

[0089] Furthermore, the slider 20 is positioned at the lower end 63 of the guideline 19, and the engagement pin 79 of the pivot lever 73 slides (rides over) the outer peripheral edge 75 of the engagement cam 72 in one direction, moving the engagement pin 79 to the locked position, and the sliding (up and down movement) of the slider 20 is locked with tension applied to the traction chain 22. When the sliding of the slider 20 is locked, the pivot lever 73 hangs down in the vertical direction from the lower end 63 of the guideline 19, as shown in FIG.

[0090] First, while gripping the grip portion 77 (handle) of the swing lever 73, a swing force is applied to the grip portion 77 of the swing lever 73 in the counterclockwise direction (reverse direction) while pressing (pushing) the swing lever 73 downward in the vertical direction. By applying a swing force to the grip portion 77, the swing arm 78 and the engagement pin 79 swing counterclockwise (reverse direction), and the engagement pin 79 slides (rides over) the outer circumferential edge 75 of the engagement cam 72 in the other direction, moving the engagement pin 79 to the unlocked position and disengaging from the engagement cam 72. When the engagement pin 79 is moved to the unlocked position, the slider 20 is unlocked from sliding (up and down movement), and the tension acting on the traction chain 22 is released.

[0091] When the gripping portion 77 of the swivel lever 73 is rotated counterclockwise, the swivel arm 78 also rotates counterclockwise (in the opposite direction), and as shown in Fig. 8, the tip 80 of the swivel arm 78 abuts against the inner surface of the second installation plate 43 of the installation unit 16. When the tip 80 of the swivel arm 78 abuts against the inner surface of the second installation plate 43, the counterclockwise rotation of the gripping portion 77 (swivel lever 73) stops at that point.

[0092] The extension dimension of the swivel arm 78 and the positional relationship between the engagement cam 72 and the engagement pin 79 are adjusted so that the lock is released when the swivel lever 73 (grip 77) is rotated counterclockwise (reverse direction) by 15 to 20 degrees from the state shown in FIG. 7 in which the swivel lever 73 hangs down from the lower end 63 of the guideline 19. Furthermore, the extension dimension of the swivel arm 78 is adjusted so that the tip 80 of the swivel arm 78 abuts against the inner surface of the second installation plate 43 of the installation unit 16 when the swivel lever 73 is rotated counterclockwise (reverse direction) by 15 to 20 degrees.

[0093] Next, while gripping the grip portion 77 (handle) of the swing lever 73, the slider 20 is slid (pushed up) together with the swing lever 73 upward in the vertical direction from the lower end 63 toward the upper end 61 of the guide line 19. When the slider 20 is slid upward in the vertical direction, the traction chain 22 located in the first chain housing portion 46 moves upward in conjunction with the sliding of the slider 20, and the sprocket 83 engaged with the traction chain 22 rotates clockwise. When the sprocket 83 rotates, the first and second rods 82a, 82b (rotation mechanisms 23a, 23b) rotate clockwise in conjunction with the rotation of the first and second rods 82a, 82b, and the first and second rollers 84a, 84b rotate clockwise in conjunction with the rotation of the first and second rods 82a, 82b. When the first and second rollers 84a, 84b rotate clockwise, the first and second wires 15a, 15b are paid out in one direction (forward in the front-rear direction) from the first and second rollers 84a, 84b as shown in FIGS.

[0094] At the initial movement (start of rotation) of rotating the first and second window bodies 13a, 13b from a closed state to an open state, the repulsive forces of the first and second kick-out springs 14a, 14b (kick-out means) installed on the first side portion 38a and the second side portion 38b of the window bodies 13a, 13b act on the free end portions 37 of the window bodies 13a, 13b, and the repulsive forces (kick-out forces) of the kick-out springs 14a, 14b press (push) the free end portions 37 of the first and second window bodies 13a, 13b forward in the front-to-back direction, applying a vertically downward rotation force to the free end portions 37 of the window bodies 13a, 13b.

[0095] Furthermore, when the first kick-out spring 14a (kick-out means) is installed on the first abutment plate 32 of the first side frame 26a of the first and second window frames 12a, 12b and the second kick-out spring 14b (kick-out means) is installed on the second abutment plate 34 of the second side frame 26b of the first and second window frames 12a, 12b, the repulsive forces of the kick-out springs 14a, 14b (kick-out means) act on the free end portions 37 of the window bodies 13a, 13b, and the repulsive forces (kick-out forces) of the kick-out springs 14a, 14b press (push) the free end portions 37 of the first and second window bodies 13a, 13b forward in the front-to-back direction, applying a downward pivoting force in the up-down direction to the free end portions 37 of the window bodies 13a, 13b.

[0096] The first and second window bodies 13a, 13b rotate using the repulsive force of the first and second kick-out springs 14a, 14b during the initial movement when the free ends 37 of the window bodies 13a, 13b rotate from the closed position to the open position, and during the rotation process except for the initial movement, the free ends 37 of the window bodies 13a, 13b automatically rotate downward in the vertical direction around the rotating end 36 due to the weight of the window bodies 13a, 13b.

[0097] As the free ends 37 of the first and second window bodies 13a, 13b automatically rotate downward in the vertical direction, the first and second wires 15a, 15b are automatically unwound in one direction (forward in the longitudinal direction), the first and second rods 82a, 82b (rotation mechanisms 23a, 23b) automatically rotate clockwise, and the sprocket 83 automatically rotates clockwise. Furthermore, the traction chain 22 automatically operates upward, and the slider 20 automatically slides upward toward the upper end 61 of the guide line 19.

[0098] When the first wire 14a is unwound in one direction (forward in the front-to-rear direction) from the first roller 84a and the first rod 82a (first ring mounting drum 85a) rotates clockwise, the load point of the first torsion spring 86a twists in the opposite direction to the winding direction, or twists in the winding direction, with the fixed point of its arm as the torsion base end.When the second wire 14b is unwound in one direction (forward in the front-to-rear direction) from the second roller 84b and the second rod 84b (second ring mounting drum 85b) rotates clockwise, the load point of the second torsion spring 86b twists in the opposite direction to the winding direction, or twists in the winding direction, with the fixed point of its arm as the torsion base end.

[0099] When the first and second torsion springs 86a, 86b are twisted in the direction opposite to the winding direction or in the winding direction, the torsion springs 86a, 86b exert a torque in the opposite direction (the winding direction or the opposite direction to the winding direction) proportional to the twist angle, and the torque of the torsion springs 86a, 86b applies a rotational force to the free ends 37 of the first and second window bodies 13a, 13b to rotate them upward in the vertical direction from the open position to the closed position.

[0100] In the window opening and closing system 10, the slider 20 slides upward in the vertical direction at the middle portion 62 (the vertical central area of ​​the erection unit 16) from the lower end 63 of the guideline 19 toward the upper end 61, thereby operating the traction chain 22 (pulling member) upward in the vertical direction, and the upward operation of the traction chain 22 rotates the sprocket 83 (rotation mechanisms 23a, 23b), which unwinds the first and second wires 15a, 15b from the first and second rollers 84a, 84b, thereby rotating the first and second window bodies 13a, 13b from the closed state to the open state. Therefore, the window bodies 13a, 13b can be rotated from the closed state to the open state simply by sliding the slider 20 upward and downward, and the first and second window bodies 13a, 13b can be smoothly rotated from the closed state to the open state without requiring much effort or time, thereby easily opening the window bodies 13a, 13b.

[0101] The window opening and closing system 10 uses the repulsive force (extending force) of the first and second kick-out springs 14a, 14b (kick-out means) to rotate the free ends 37 of the first and second window bodies 13a, 13b at the initial movement when they rotate from the closed position to the open position, and during the rotation process except for the initial movement, the free ends 37 of the window bodies 13a, 13b automatically rotate downward in the vertical direction due to the own weight of the window bodies 13a, 13b.Therefore, by using the repulsive force of the first and second kick-out springs 14a, 14b, the window bodies 13a, 13b can be rotated reliably at the initial movement when the slider 20 is slid upward in the vertical direction, and by sliding the slider 20 upward, the window bodies 13a, 13b can be rotated smoothly from the closed state to the open state, and the window bodies 13a, 13b can be easily opened. In the window opening and closing system 10, the free ends 37 of the window bodies 13a, 13b are rotated by the repulsive force (extension force) of the first and second kick-out springs 14a, 14b (kick-out means) at the time of initial movement, and during the rotation process except at the time of initial movement, the free ends 37 of the window bodies 13a, 13b are automatically rotated downward in the vertical direction by the weight of the first and second window bodies 13a, 13b, so that in an emergency, the window bodies 13a, 13b can be opened all at once without the need to slide the slider 19.

[0102] The window opening and closing system 10 is unlocked by rotating the gripping portion 77 (rotating lever 73) counterclockwise (either forward or reverse) while the sliding of the slider 20 is locked, and moving the engagement pin 79 to an unlocked position where it has slid over (ridden over) the outer peripheral edge 75 of the engagement cam 72.Therefore, the lock can be easily released from the locked state in which the sliding of the slider 20 is locked, and the first and second window bodies 13a, 13b can be easily opened.

[0103] The window opening / closing system 10 is unlocked by rotating the gripping portion 77 (rotating lever 73) 15 to 20 degrees from the state in which the sliding of the slider 20 is locked, so the lock can be released easily and quickly without having to rotate the gripping portion 77 (rotating lever 73) significantly (for example, by 90 degrees) from the state in which the sliding of the slider 20 is locked.

[0104] An example of the procedure for pivoting the free ends 37 of the window bodies 13a, 13b upward in the vertical direction to close the window bodies 13a, 13b from an open state is as follows: While gripping the grip portion 77 (handle) of the pivot lever 73, the slider 20 together with the pivot lever 73 is slid downward in the vertical direction from the upper end 61 toward the lower end 63 of the guide line 19 (push down). Note that the torque (repulsive force) of the first and second torsion springs 86a, 86b adjusts the load (kg) acting on the slider 20 when pivoting the window bodies 13a, 13b from the lower to the upper direction to about 1.5 to 2 kg.

[0105] When the slider 20 is slid downward, the traction chain 22 moves downward in the up-and-down direction in conjunction with the sliding of the slider 20, and the sprocket 83 engaged with the traction chain 22 rotates counterclockwise. When the sprocket 83 rotates, the first and second rods 82a, 82b (rotation mechanisms 23a, 23b) rotate counterclockwise in conjunction with the rotation of the sprocket 83, and the first and second wires 15a, 15b are wound in the other direction (rearward in the front-to-rear direction) around the first and second rollers 85a, 84b.

[0106] As the first and second wires 15a, 15b are wound around the first and second rollers 84a, 84b, the free ends 37 of the first and second window bodies 13a, 13b begin to pivot upward in the vertical direction from the open position toward the closed position. Because a pivoting force is applied to the free ends 37 of the first and second window bodies 13a, 13b by the torque of the first and second torsion springs 86a, 86b to pivot from the open position toward the closed position, the entire weight of the window bodies 13a, 13b is not applied to the sliding of the slider 20, and a load (in the range of 1.5 to 2 kg) obtained by subtracting the repulsive force of the torsion springs 86a, 86b from the weight of the window bodies 13a, 13b acts on the slider 20.

[0107] By sliding (pushing down) the slider 20 to the lower end 63 of the guideline 19, the first and second window bodies 13a, 13b pivot from the open state to the closed state. When the first and second window bodies 13a, 13b are closed, the torsion of the first and second torsion springs 86a, 86b is released, and the torque of these torsion springs 86a, 86b becomes zero. Before the free ends 37 of the window bodies 13a, 13b pivot to the closed position, the free ends 37 are pivoted upward in the vertical direction against the repulsive forces of the kick-out springs 14a, 14b, and the first and second window bodies 13a, 13b are closed in this state. After sliding the slider 20 to the lower end 63 of the guideline 19, while holding the grip portion 77 of the pivot lever 73, apply a pivoting force to the grip portion 77 in the clockwise direction (positive direction) while pressing (pushing) the pivot lever 73 downward in the vertical direction.

[0108] By applying a turning force to the gripping portion 77 and turning the turning lever 73 clockwise (positive direction) by 15 to 20 degrees, the engagement pin 79 turns clockwise (positive direction) and slides (rides over) the outer peripheral edge 75 of the engagement cam 72 in one direction, the engagement pin 79 moves to the lock position, and the engagement pin 79 engages with the engagement cam 72. When the engagement pin 79 is moved to the lock position, the turning lever 73 hangs down from the lower end 63 of the guide line 18, tension is applied to the traction chain 22, and the sliding (up and down movement) of the slider 20 is locked. When the engagement pin 79 moves to the locked position and tension is applied to the traction chain 22, the rotating end 36 is hermetically sealed to the lower frame 25, the first and second side portions 38a, 38b are hermetically sealed to the first and second side frames 26a, 26b, and the free end 37 is hermetically sealed to the upper frame 24.

[0109] In the window opening and closing system 10, the slider 20 slides downward from the upper end 61 of the guideline 19 to operate the traction chain 22 (traction member) downward in the vertical direction, and the downward operation of the traction chain 22 rotates the sprocket 83 (rotation mechanisms 23a, 23b) to wind the first and second wires 15a, 15b onto the first and second rollers 84a, 84b, and rotates the first and second window bodies 13a, 13b from the open state to the closed state. Therefore, by simply sliding the slider 20 downward in the vertical direction, the window bodies 13a, 13b can be rotated from the open state to the closed state, and the first and second window bodies 13a, 13b can be smoothly rotated from the open state to the closed state without requiring much effort or time, and the window bodies 13a, 13b can be easily closed. When closing the open window bodies 13a, 13b, the window opening and closing system 10 does not require the winding handle to be rotated multiple times as in the prior art, but only requires the slider 20 to be slid downward in the vertical direction, and the open window bodies 13a, 13b can be closed in a short time by a simple sliding operation.

[0110] The window opening and closing system 10 rotates the gripping portion 77 of the swivel lever 73 clockwise (positive direction) at the lower end 63 of the guideline 19, moving the engagement pin 79 of the swivel lever 69 to a locking position where it slides over (goes over) the outer peripheral edge 75 of the engagement cam 72, applying tension to the traction chain 22 while locking the sliding (up and down movement) of the slider 20.Therefore, by moving the engagement pin 79 to the locking position, the closed positions of the first and second window bodies 13a, 13b can be clearly confirmed, and the window bodies 13a, 13b will not be left in an incompletely closed state, allowing the window bodies 13a, 13b to be reliably and airtightly closed in a complete state.

[0111] The window opening / closing system 10 locks the sliding of the slider 20 while tension is applied to the traction chain 22, so the traction chain 22 does not loosen, the first and second window bodies 13a, 13b can be closed airtight, and air flow can be prevented (blocked) when the window bodies 13a, 13b are closed. The window opening / closing system 10 can lock the sliding of the slider 20 by turning the gripping portion 77 of the turning lever 73 by 15 to 20 degrees from the unlocked state of the slider 20, so the sliding of the slider 20 can be locked easily and quickly without turning the gripping portion 77 of the turning lever 73 by a large amount (for example, by 90 degrees) from the unlocked state of the slider 20.

[0112] When closing the first and second window bodies 13a and 13b in an open state without using the first and second torsion springs 86a and 86b, a considerable force is required to slide the slider 20 downward in the vertical direction due to the weight of the window bodies 13a and 13b. However, in the window opening and closing system 10, the torque of the torsion springs 86a and 86b promotes winding of the first and second wires 15a and 15b around the first and second rollers 84a and 84b, and the window bodies 13a and 13b are lifted. The torque of these torsion springs 86a, 86b is adjusted so that the load acting on the slider 20 when it is rotated from below to above is approximately 1.5 to 2 kg. Therefore, by utilizing these torsion springs 86a, 86b, the slider 20 can be slid downward in the vertical direction without requiring a large amount of force, and the first and second window bodies 86a, 86b can be smoothly rotated from an open state to a closed state, making it easy to close the window bodies 86a, 86b.

[0113] Fig. 15 is a side view of an installation unit 16 showing another example, and Fig. 16 is a side view of the installation unit 16 showing a state in which the slider 20 abuts against a stopper 87. Fig. 17 is a partially enlarged view of the installation unit 16 showing a state in which the slider 20 is fixed to a predetermined position on the guide line 19 by a setscrew 88, and Fig. 18 is a cross-sectional view taken along line AA in Fig. 17. The installation unit 16 shown in Figs. 15 to 18 differs from that shown in Fig. 4 in that a stopper 87 is provided at a predetermined position on the guide line 19 of the installation unit 16, and that a setscrew 88 (fixing means) is provided on the slider 20.

[0114] The other configurations of the window opening and closing system 11 equipped with the installation unit 16 in Figures 15 to 18 are the same as those of the window opening and closing system 10 in Figure 1, so the explanation of Figure 1 will be used for the other configurations of the window opening and closing system 11. Note that the configuration of the installation unit 16 is the same as that in Figure 4, so the explanation of Figure 4 will be used and the same reference numerals as in Figure 4 will be used, and explanation of the configuration of the installation unit 16 will be omitted.

[0115] A stopper 87 is detachably attached to the guide line 19 of the erection unit 16. The stopper 87 is installed at a predetermined location (base plate 44 or connecting plate 55) in the middle portion 62 (movement space) of the guide line 19 by a predetermined connecting means. The upper end of the upper plate 64 of the slider 20 that slides upward in the vertical direction abuts against the stopper 87. When the upper end of the upper plate 64 abuts against the stopper 87, further upward sliding of the slider 20 is stopped.

[0116] The installation position of the stopper 87 in the intermediate portion 62 (movement space) of the guide line 19 can be determined arbitrarily. By adjusting the installation position of the stopper 87 in the intermediate portion 62 of the guide line 19, it is possible to adjust the vertical movement distance (sliding distance) of the slider 20 on the guide line 19, and it is also possible to adjust the vertical downward rotation angle (opening area) of the first and second window bodies 13a, 13b.

[0117] When the slider 20 is unlocked from sliding (up and down movement) and the slider 20 is slid (pushed up) together with the rotation lever 73 from the lower end 63 toward the upper end 61 of the guideline 19 in the vertical direction, the weight of the first and second window bodies 13a, 13b causes the free ends 37 of the window bodies 13a, 13b to automatically rotate downward in the vertical direction around the rotating end 36 during the rotation process, and the slider 20 automatically slides upward toward the upper end 61 of the guideline 19. However, when the upper end of the upper plate 64 of the slider 20 abuts against the stopper 87, the slider 20 stops sliding along the guideline 19, at which point the upward movement of the traction chain 22 stops, the clockwise rotation of the sprocket 83 stops, and the payout in one direction (forward in the front-to-back direction) of the first and second wires 15a, 15b stops.

[0118] When the slider 20 abuts against the stopper 87 and the unwinding of the wires 15a, 15b stops, the free ends 37 of the first and second window bodies 13a, 13b stop pivoting downward in the vertical direction. The angle of pivoting downward in the vertical direction of the first and second window bodies 13a, 13b varies depending on the installation position of the stopper 87 in the intermediate portion 62 (movement space) of the guideline 19, and the open area of ​​the window bodies 13a, 13b when open varies.

[0119] The setscrew 88 (fixing means) is made of metal such as aluminum, stainless steel, or other alloy, or synthetic resin, and is composed of an operating portion 89 (head), a threaded portion 90, and a slide stop roller 91. In the setscrew 88, the top of the threaded portion 90 is fixed to the operating portion 89, and the slide stop roller 91 is inserted into and fixed to the bottom of the threaded portion 90. The threaded portion 90 is threaded into a screw hole (screw hole) formed in the upper plate 64 of the slider 20. When the operating portion 89 of the setscrew 88 is rotated clockwise (forward), the threaded portion advances (moves) toward the connecting plate 55 (base plate 44) of the installation unit 16, and when the operating portion 89 of the setscrew 88 is rotated counterclockwise (reverse), the threaded portion retreats (moves) in a direction away from the connecting plate 55 (base plate 44) of the installation unit 16.

[0120] To use the setscrew 88, while holding the swivel lever 73, the slider 20 is gradually slid up and down together with the swivel lever 73 from the lower end 63 to the upper end 61 of the guideline 19, during which the sliding of the slider 20 is stopped at a predetermined point on the guideline 19. Once the sliding of the slider 20 has been stopped, the operating portion 89 (head) of the setscrew 88 is rotated counterclockwise (reverse direction) to retract the threaded portion 90 so as to move it away from the connecting plate 55 (base plate 44) of the installation unit 16. When the threaded portion 90 is retracted, the tapered portion of the slide stop roller 91 attached to the threaded portion 90 presses against the protrusions projecting inward from the inner surfaces of the second and third guide plates 50, 52, at which point the slider 20 is fixed to the installation unit 15. By fixing the slider 20 to the installation unit 15, the slider 20 is prevented from sliding further upward, and the first and second wires 15a and 15b are stopped from being paid out in one direction (forward in the front-rear direction).

[0121] The tapered portion of the slide stop roller 91 of the set screw 88 presses against the protrusions on the inner surfaces of the second and third guide plates 50, 52, and the free ends 37 of the first and second window bodies 13a, 13b stop pivoting downward in the vertical direction when the wires 15a, 15b stop being paid out. The angle at which the first and second window bodies 13a, 13b pivot downward in the vertical direction varies depending on the fixed position of the slider 20 on the guide line 19 using the set screw 88, and the open area of ​​the window bodies 13a, 13b when open varies.

[0122] To release the slider 20 after it has been fixed to the connecting plate 55 by the setscrew 88, the operating portion 89 of the setscrew 88 is rotated clockwise (positive direction) to advance the threaded portion 90 toward the connecting plate 55 (base plate 44). When the threaded portion 90 is advanced, the tapered portion of the slide stop roller 91 separates from the protrusions on the inner surfaces of the second and third guide plates 50, 52, and the pressure of the tapered portion of the slide stop roller 91 against the protrusions on the inner surfaces of the second and third guide plates 50, 52 is released, the slider 20 is released from the fixed state, and the slider 20 becomes able to slide up and down.

[0123] The window opening and closing system 11 can adjust the upward movement distance (sliding distance) of the slider 20 from the lower end 63 of the guideline 19 by adjusting the installation position of the stopper 87 on the guideline 19, and can also adjust the downward rotation angle of the rotating end portions 36 of the first and second window bodies 13a, 13b from the upper frame 24.Therefore, the stopper 87 can adjust the opening area of ​​the window bodies 13a, 13b when open, and can adjust the volume of air flowing through the window bodies 13a, 13b.

[0124] The window opening and closing system 11 uses a set screw 88 (fixing means) to fix the slider 20 at a predetermined location on the guideline 19, thereby allowing the window bodies 13a, 13b to be opened with the free ends 37 of the window bodies 13a, 13b rotated downward from the upper frame 24 at any angle.Therefore, the set screw 88 can be used to adjust the opening area of ​​the window bodies 13a, 13b when open, and the amount of air flowing through the window bodies 13a, 13b can be adjusted. [Explanation of symbols]

[0125] 10 Window opening and closing system 11 Window opening and closing system 12a First window frame 12b Second window frame 13a First window body (first shoji screen) 13b Second window body (second shoji screen) 14a First kick spring 14b Second kick spring 15a First Wire 15b Second Wire 16 Erection Unit 17a First drive unit 17b Second drive unit 18 Chain operating means 19 Guidelines 20 Slider 21 Locking mechanism 22 Traction chain (traction member) 23a First rotation mechanism 23b Second rotation mechanism 24 Upper Frame 25 Lower Frame 26a First side frame 26b Second side frame 27 Upper frame plate 28 Upper contact plate 29 Lower frame plate 30 Lower abutment plate 31 First side frame plate 32 First contact plate 33 Second side frame plate 34 Second abutment plate 35 Window Installation 36 Rotating end (rotating frame) 37 Free end (swivel frame) 38a First side portion (first side frame) 38b Second side portion (second side frame) 39 Shoji metal fittings 40 Upper end 41 Lower end 42 First erection plate 43 Second erection plate 44 base plate 45 Cover Plate 46 First chain storage space (first guide recess) 47 Second chain storage space (second guide recess) 48 storage spaces 49 First guide plate 50 Second guide plate 51 First guide base plate 52 Third guide plate 53 4th guide plate 54 Second guide base plate 55 connecting plate 56 Plate 1 57 Second Plate 58 Third Plate 59 Bearing plate 60a First Storage Space 60b Second Storage Space 61 Upper end 62 Middle section (movement space) 63 Bottom end 64 Upper Plate 65 Lower Plate 66 One end 67 1st connection part 68 2nd connection part 69 Screw hole (screw hole) 70 Adjustment screw 71 Threaded part 72 Engagement cam 73 Swivel lever (swivel handle) 75 outer edge 76 Rotating base end 77 Grip (handle) 78 Swivel Arm 79 Engagement pin 80 Tip 81 Other end (free end) 82a First Rod 82b Second Rod 83 sprocket 84a First Roller 84b Second Roller 85a First ring mounting drum 85b Second ring mounting drum 86a 1st torsion spring 86b Second torsion spring 87 Stopper 88 Set screw (fixing means) 89 Control section 90 Threaded part 91 Slide stop roller

Claims

1. A window opening and closing system comprising: a window body whose free end rotates in a vertical direction around a rotation end that is rotatably installed on a window frame; a wire that is connected to the free end of the window body and rotates the window body from a closed state to an open state and from the open state to the closed state; and a wire operating means that pays out the wire in one direction to rotate the window body from the closed state to the open state and pulls the wire in the other direction to rotate the window body from the open state to the closed state, a kick-out means for applying a rotation force to the window body at the initial movement of rotating the window body from a closed state to an open state is installed on either the window frame or the window body, and the wire operating means is formed from a guideline located below the window frame and extending in the vertical direction, a slider that slides in the vertical direction along the guideline, a pulling member that is connected to the slider and moves up and down as the slider slides in the vertical direction, and a rotation mechanism that rotates in accordance with the vertical movement of the pulling member, and winds up and pays out the wire, The window opening and closing system is characterized in that the slider is slid up and down on the guideline to operate the pulling member in the up and down direction, the wire is unwound in one direction while rotating the rotation mechanism, and the kick-out force of the kick-out means is used at the time of the initial movement to apply a rotation force to the window body and rotate the window body from a closed state to an open state, or the slider is slid up and down on the guideline to operate the pulling member in the up and down direction, and the wire is pulled in the other direction while rotating the rotation mechanism to rotate the window body from an open state to a closed state.

2. Specific examples of up and down movement of the slider (embodiment) The window opening and closing system according to claim 1, wherein the slider slides upward in the vertical direction from the lower end of the guideline to operate the pulling member upward in the vertical direction, the wire is unwound in one direction while rotating the rotation mechanism, the kick-out force of the kick-out means is used during the initial movement to apply a turning force to the window body and turn the window body from a closed state to an open state, the slider slides downward in the vertical direction from the upper end of the guideline to operate the pulling member downward in the vertical direction, and the wire is pulled in the other direction while rotating the rotation mechanism to turn the window body from an open state to a closed state.

3. The kick-out means is a kick-out spring that applies a swing force to the window body when the free end of the window body initially swings from the closed position to the open position, the window frame is formed of upper and lower frames that are spaced apart in the vertical direction and extend laterally, and first and second side frames that are spaced apart in the horizontal direction and extend vertically, and the window body is rotatably installed on the lower frame and has the rotating end that is airtightly attached to the lower frame in the closed state, the free end that swings to the closed position where it is airtightly attached to the upper frame in the closing operation and swings to an open position below in the vertical direction in the opening operation, and the free end that is spaced apart in the horizontal direction 3. A window opening and closing system according to claim 1 or claim 2, having first and second side portions extending opposite each other in the vertical direction, a pair of the kick springs being installed on the first and second side frames or the first and second side portions, wherein the window opening and closing system rotates by a rotation force exerted by the repulsive force of the kick springs when the free end of the window body initially rotates from the closed position to the open position, and during the rotation process excluding the initial movement, the free end of the window body automatically rotates downward in the vertical direction due to its own weight, and before the free end of the window body rotates to the closed position, the free end rotates upward in the vertical direction against the repulsive force of the kick springs.

4. 4. A window opening and closing system as described in any one of claims 1 to 3, wherein the traction member is a traction chain connected at one end to the slider and moving up and down as the slider slides up and down, and the rotation mechanism is formed by a rod rotatably mounted on the window frame and extending laterally, a sprocket formed on one side of the rod with which the traction chain engages and which rotates as the traction chain moves up and down, and a roller formed on the other side of the rod to which the wire is connected and which pays out and winds up the wire as the sprocket rotates.

5. The window opening and closing system of claim 4, wherein the rotation mechanism includes a torsion spring that is installed on the other side of the rod and that, when twisted in the winding direction or the opposite direction to the winding direction, generates torque in the opposite direction proportional to the twist angle, and when the rod rotates in the direction of unwinding the wire, the torsion spring twists in the winding direction or the opposite direction to the winding direction, and the torsion spring generates torque in the direction of pulling the wire, and the torque of the torsion spring promotes winding of the wire onto the roller.

6. A window opening and closing system as described in any one of claims 3 to 5, wherein the window opening and closing system includes an erection unit extending downward from either one of the first side frame and the second side frame that form the window frame, and the guide line is formed on the erection unit, positioned below the window frame, and extending in the vertical direction.

7. 7. A window opening and closing system as described in claim 6, wherein the installation unit is formed from a first guide plate and a second guide plate extending in the vertical direction opposite each other, and a base plate located between the first and second guide plates and extending in the vertical direction, a first chain accommodating space for accommodating the traction chain so that it can move up and down is formed on the side of the first guide plate and extends in the vertical direction, and a second chain accommodating space for accommodating the traction chain so that it can move up and down is formed on the side of the second guide plate and extends in the vertical direction.

8. A window opening and closing system as described in any one of claims 4 to 7, wherein the wire operating means includes a locking mechanism that applies tension to the traction chain and locks the sliding of the slider when the slider is slid downward in the vertical direction and positioned at the lower end of the guideline.

9. 9. The window opening and closing system according to claim 8, wherein the locking mechanism is formed from an engagement cam formed at the lower end of the guideline and a pivot lever rotatably installed at the lower end of the slider, having an engagement pin at a rotation base end located at the lower end of the slider, the engagement pin moving along the outer periphery of the engagement cam, and wherein the window opening and closing system moves the slider to the lower end of the guideline, and then rotates the pivot lever in either the forward or reverse direction to move the engagement pin along the outer periphery of the engagement cam to a predetermined lock position, thereby locking the sliding of the slider with tension applied to the traction chain, and wherein the window opening and closing system allows the slider to slide by rotating the pivot lever in either the forward or reverse direction with the sliding of the slider locked and moving the engagement pin along the outer periphery of the engagement cam to a predetermined unlock position.

10. A window opening and closing system as described in any one of claims 1 to 9, wherein the window opening and closing system includes a stopper that is removably installed at a predetermined location on the guideline and stops the slider from sliding in the vertical direction, and the window opening and closing system is capable of adjusting the vertical sliding distance of the slider from the lower end of the guideline and the downward rotation angle of the free end of the window body from the upper frame by adjusting the installation position of the stopper on the guideline.

11. 10. A window opening and closing system as described in any one of claims 1 to 9, wherein the window opening and closing system includes a fixing means attached to the slider for fixing the slider to a predetermined position on the guideline, and the window opening and closing system is capable of fixing the slider to a predetermined position on the guideline using the fixing means in the process of sliding the slider up and down on the guideline, and is capable of opening the window body with the free end of the window body pivoted downward from the upper frame at any angle.

Images