Window opening and closing system

Abstract

To provide a window opening / closing system that can smoothly rotate a window body to easily open and close the window body with less labor and time.SOLUTION: In a window opening / closing system 10, a slider 19 is slid upward along a vertical direction from a bottom edge of a guideline 18 to move a traction chain upward along the vertical direction, and first and second rollers are rotated by the rotation of sprockets engaged with the traction chain to pay out first and second turning chains in one direction, which rotates window bodies 13a and 13b from a closed state to an open state. The slider 19 is slid downward along the vertical direction from a top edge of the guideline 18 to move the traction chain downward along the vertical direction, and the first and second rollers are rotated by the rotation of the sprockets to pull the first and second turning chains in the other direction, which rotates the window bodies 13a and 13b from the open state to the closed state.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 suitably used for a smoke exhaust window.

Background Art

[0002] A window opening and closing device is disclosed that includes a shoji (window body) displaceably assembled to a window frame and a handle box for opening and closing the shoji (Patent Document 1). The handle box includes a handle portion that is rotated by an operator when the operator closes the shoji, an opening and closing mechanism that displaces the shoji in a closing direction using the rotational force generated by the operation of the handle portion, and an input portion to which the rotational force generated by the operation of the handle portion is input, and includes a fluid coupling 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 in which a viscous fluid is enclosed and an output shaft that outputs a rotational force to the opening and closing mechanism, and a rotating body that is rotatably housed in the casing and rotates by receiving the rotational force input to the input portion.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When closing the shoji (window body) in the open state, the operator rotates the winding handle in the direction of winding the wire in the window opening / closing device disclosed in Patent Document 1. The operation of rotating the winding handle requires the winding handle to be rotated many times, which is troublesome for the operator, and the closing operation of the shoji in the open state requires labor and time. Also, when the winding handle is installed at a position separated from the window and it is difficult to know the opening / closing state of the window during the operation of the winding handle, it is difficult to know how much the winding handle should be rotated to close the shoji, and the rotation of the handle may be stopped during the process of completely closing the shoji, and the shoji may be left in an incompletely closed state.

[0005] An object of the present invention is to provide a window opening / closing system that can smoothly swing the window body from the closed state to the open state without requiring labor and time, and can easily open the window body, and can smoothly swing the window body from the open state to the closed state and can easily close the window body. Another object of the present invention is to provide a window opening / closing system that can clearly confirm the closed position of the window body, and the window body will not be left in an incompletely closed state, and the window body can be surely closed in a complete state.

Means for Solving the Problems

[0006] A premise of the present invention for solving the above problems is a window body in which a free end swings in the vertical direction around a rotation end rotatably installed on a window frame, and a window body connected to the free end of the window body to swing the window body from the closed state to the open state and A swing chain that swings from the open state to the closed state, and a chain operating means that feeds out the swing chain in one direction to swing the window body from the closed state to the open state and pulls the swing chain in the other direction to swing the window body from the open state to the closed state. It is a window opening / closing system provided with.

[0007] The features of the present invention under the above premise are that the chain operating means is formed by a guide line located below the window frame and extending in the vertical direction, a slider that slides vertically along the guide line, a traction member connected to the slider and moving up and down as the slider slides vertically, and a rotating mechanism that rotates as the traction member moves up and down, winds up the swivel chain, and pays out the swivel chain. the window frame is formed by an upper frame and a lower frame that extend horizontally while being spaced apart from each other in the vertical direction, and first and second side frames that extend vertically while being spaced apart from each other in the horizontal direction, the window opening and closing system includes an installation unit that extends downward from either one of the first side frame and the second side frame that form the window frame, and a guideline is formed in the installation unit and is located below the window frame and extends in the vertical direction. The window opening and closing system slides the slider vertically on the guide line to operate the traction member vertically, rotates the rotating mechanism while paying out the swivel chain in one direction to rotate the window body from the closed state to the open state, or pulls the swivel chain in the other direction while rotating the rotating mechanism to rotate the window body from the open state to the closed state.

[0008] As an example of the present invention, the window opening and closing system slides the slider vertically upward from the lower end of the guide line to operate the traction member vertically upward, rotates the rotating mechanism while paying out the swivel chain in one direction to rotate the window body from the closed state to the open state, slides the slider vertically downward from the upper end of the guide line to operate the traction member vertically downward, and pulls the swivel chain in the other direction while rotating the rotating mechanism to rotate the window body from the open state to the closed state.

[0009] As another example of the present invention, the window body has a rotating end portion rotatably connected to the lower frame and airtightly adhering to the lower frame in the closed state, and a free end portion that rotates to an airtight closing position adhering to the upper frame in the closing operation and rotates to a lower open position in the vertical direction in the opening operation. When the swivel chain rotates the window body from the closed state to the open state at the start, it exerts a payout force that promotes the rotation of the free end portion by its linear motion. The window opening and closing system utilizes the payout force of the swivel chain to rotate while the free end portion of the window body rotates from the closed position to the open position at the start, and the free end portion of the window body automatically rotates downward in the vertical direction due to the self-weight of the window body during the rotation process except at the start.

[0010] As another example of the present invention, the traction member is a traction chain with one end connected to the slider and moving up and down as the slider slides in the vertical direction. The rotation mechanism includes a rod rotatably installed on the window frame and extending horizontally, a sprocket formed on one side of the rod with the traction chain engaged therewith and rotating as the traction chain moves up and down, and a roller formed on the other side of the rod with the swivel chain connected thereto and feeding out and winding up the swivel chain as the sprocket rotates.

[0011] As another example of the present invention, the rotation mechanism includes a torsion spring installed on the other side of the rod and generating torque in the opposite direction proportional to the torsional angle when twisted in the winding direction or the direction opposite to the winding direction. When the rod rotates in the direction of feeding out the swivel chain, the torsion spring is twisted in the winding direction or the direction opposite to the winding direction, and the torsion spring generates torque in the direction of pulling the swivel chain, and the winding of the swivel chain onto the roller is promoted by the torque of the torsion spring.

[0012] As another example of the present invention, the erection unit is formed by a first guide plate and a second guide plate extending in the vertical direction and facing each other, and a base plate located between the first and second guide plates and extending in the vertical direction. A first chain accommodation space for accommodating the traction chain to move up and down is formed on the side of the first guide plate and extends in the vertical direction, and a second chain accommodation space for accommodating the traction chain to move up and down is formed on the side of the second guide plate and extends in the vertical direction.

[0013] As another example of the present invention, the chain operating means includes a locking mechanism that locks the slide of the slider while applying a tension force to the traction chain when the slider is slid downward in the vertical direction and the slider is located at the lower end of the guide line.

[0014] As another example of the present invention, the locking mechanism is formed by an engagement cam formed at the lower end of the guideline and a turning lever rotatably installed at the lower end of the slider and having an engagement pin at a rotating base end located at the lower end of the slider, and the engagement pin moves along the outer peripheral edge of the engagement cam. The window opening and closing system, after moving the slider to the lower end of the guideline, rotates the turning lever either forward or backward, and moves the engagement pin to a predetermined locking position along the outer peripheral edge of the engagement cam, thereby locking the slide of the slider with the tension applied to the traction chain. With the slide of the slider locked, the turning lever is rotated either forward or backward to move the engagement pin to a predetermined unlocking position along the outer peripheral edge of the engagement cam, thereby enabling the slider to slide in the guideline.

[0015] As another example of the present invention, the window opening and closing system includes a stopper removably installed at a predetermined position of the guideline to stop the vertical slide of the slider. The window opening and closing system can adjust the vertical slide distance of the slider from the lower end of the guideline by adjusting the installation position of the stopper in the guideline, and can adjust the turning angle of the free end of the window body downward from the upper frame.

[0016] As another example of the present invention, the window opening and closing system includes fixing means installed on the slider to fix the slider at a predetermined position of the guideline. The window opening and closing system can fix the slider at a predetermined position of the guideline by using the fixing means in the process of sliding the slider vertically in the guideline, and can open the window body with the free end of the window body turned downward at an arbitrary angle from the upper frame.

Advantages of the Invention

[0017] According to the window opening and closing system of the present invention, by sliding the slider in the vertical direction on the guideline to operate the traction member in the vertical direction to rotate the rotation mechanism while feeding out the swivel chain in one direction to swivel the window body from the closed state to the open state, the window body can be swiveled from the closed state to the open state only by the vertical sliding operation of the slider, without taking much labor and time, and the window body can be smoothly swiveled from the closed state to the open state to easily open the window body. When the window opening and closing system swivels the window body from the open state to the closed state by sliding the slider in the vertical direction on the guideline to operate the traction member in the vertical direction to rotate the rotation mechanism while pulling the swivel chain in the other direction, the window body can be swiveled from the open state to the closed state only by the vertical sliding operation of the slider, without taking much labor and time, and the window body can be smoothly swiveled from the open state to the closed state to easily close the window body. When closing the opened window body, the window opening and closing system does not need to rotate the winding handle many times as in the prior art, but only needs to slide the slider in the vertical direction, and the window body in the open state can be closed in a short time by a simple sliding operation.

[0018] Slide the slider upward in the vertical direction from the lower end of the guideline to operate the traction member upward in the vertical direction, rotate the rotating mechanism while feeding out the swivel chain in one direction to swivel the window body from the closed state to the open state, slide the slider downward in the vertical direction from the upper end of the guideline to operate the traction member downward in the vertical direction, and pull the swivel chain in the other direction while rotating the rotating mechanism to swivel the window body from the open state to the closed state. The window opening and closing system can swivel the window body from the closed state to the open state only by sliding the slider upward in the vertical direction, without requiring labor and time, and can smoothly swivel the window body from the closed state to the open state to easily open the window body. Also, it can swivel the window body from the open state to the closed state only by sliding the slider downward in the vertical direction, without requiring labor and time, and can smoothly swivel the window body from the open state to the closed state to easily close the window body. When closing the opened window body, the window opening and closing system does not need to rotate the winding handle many times as in the prior art. It only needs to slide the slider downward in the vertical direction, and can close the window body in the open state in a short time with a simple sliding operation.

[0019] The window frame is formed by an upper frame, a lower frame, a first side frame, and a second side frame. The window body has a rotatable end connected to the lower frame and a free end that pivots to an open position below in the vertical direction. When the pivoting chain pivots the window body from the closed state to the open state at the start of movement, it exerts a feeding force that promotes the pivoting of the free end by its linear motion. While the free end of the window body pivots using the feeding force of the pivoting chain at the start of pivoting, in the pivoting process except at the start of movement, the free end of the window body automatically pivots downward in the vertical direction due to the self-weight of the window body. The window opening and closing system can reliably pivot the window body when the slider is slid upward (in the vertical upward direction) by utilizing the feeding force of the pivoting chain and the self-weight of the window body. The window body can be smoothly pivoted from the closed state to the open state without the need for labor and time through the upward (vertical upward) sliding operation of the slider, and the window body can be easily opened. Since the free end of the window body automatically pivots downward in the vertical direction due to the self-weight of the window body in the pivoting process except at the start of movement, the window body can be opened all at once without the need for the sliding operation of the slider in an emergency.

[0020] The traction member is a traction chain with one end connected to the slider and moving up and down as the slider slides in the vertical direction. The rotation mechanism is rotatably installed on the window frame and consists of a rod extending horizontally, a sprocket that rotates as the traction chain moves up and down, and a roller that pays out the swivel chain and winds up the swivel chain as the sprocket rotates. The window opening and closing system slides the slider upward in the vertical direction (above the vertical direction) along the guideline to operate the traction chain in the vertical direction. The operation of the traction chain in the vertical direction (above the vertical direction) rotates the sprocket to pay out the swivel chain from the roller and swivels the window body from the closed state to the open state. Therefore, the window body can be swiveled from the closed state to the open state only by sliding the slider upward in the vertical direction (above the vertical direction), without requiring labor and time, and the window body can be smoothly swiveled from the closed state to the open state to easily open the window body. Also, the operation of the traction chain in the vertical direction (below the vertical direction) rotates the sprocket to wind up the swivel chain onto the roller and swivels the window body from the open state to the closed state. Therefore, the window body can be swiveled from the open state to the closed state only by sliding the slider downward in the vertical direction (below the vertical direction), without requiring labor and time, and the window body can be smoothly swiveled from the open state to the closed state to easily close the window body.

[0021] The window opening and closing system includes a torsion spring that generates torque in the opposite direction proportional to the twisted angle of the rotating mechanism. When the rod rotates in the direction of paying out the swivel chain, the torsion spring is twisted in the winding direction or the direction opposite to the winding direction, and the torsion spring generates torque in the direction of pulling the swivel chain (winding direction). The torque of the torsion spring promotes the winding of the swivel chain around the roller. When closing the window body in the open state, force is required to slide the slider downward or upward in the vertical direction due to the weight of the window body. However, since the torque of the torsion spring promotes the winding of the swivel chain around the roller, by using the torsion spring, the slider can be slid downward or upward in the vertical direction without requiring a large force, and the window body can be smoothly rotated from the open state to the closed state to easily close the window body.

[0022] The window opening and closing system includes an erection unit extending downward from either one of a first side frame and a second side frame forming the window frame. A guideline is formed in the erection unit and extends vertically below the window frame. By forming the guideline in the erection unit so as to extend vertically from below the window frame, the slider is disposed at 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. The window body can be smoothly rotated from the closed state to the open state to easily open the window body, and the window body can be smoothly rotated from the open state to the closed state to easily close the window body.

[0023] The window opening and closing system is formed by a first guide plate and a second guide plate that extend vertically facing each other and a base plate that is positioned between the first and second guide plates and extends vertically. A first chain accommodation space for accommodating the traction chain in a vertically movable manner is formed on the side of the first guide plate and extends vertically, and a second chain accommodation space for accommodating the traction chain in a vertically movable manner is formed on the side of the second guide plate and extends vertically. When the traction chain is vertically movably accommodated in the first and second chain accommodation spaces, the slider is slid vertically (vertically upward from the lower end of the guide line of the slider) on the guide line to vertically operate the traction chain in the first and second chain accommodation spaces. By operating the traction chain, the sprocket is rotated to unwind the swivel chain from the roller, and the window body is rotated from the closed state to the open state. Therefore, the window body can be rotated from the closed state to the open state only by sliding the slider vertically (vertically upward), without taking time and effort, and the window body can be smoothly rotated from the closed state to the open state to easily open the window body. The window opening and closing system slides the slider vertically (vertically downward from the upper end of the guide line of the slider) on the guide line to vertically operate the traction chain in the first and second chain accommodation spaces. By operating the traction chain, the sprocket is rotated to wind the swivel chain onto the roller, and the window body is rotated from the open state to the closed state. Therefore, the window body can be rotated from the open state to the closed state only by sliding the slider vertically (vertically downward), without taking time and effort, and the window body can be smoothly rotated from the open state to the closed state to easily close the window body.

[0024] When the slider is slid downward in the vertical direction and the slider is positioned at the lower end of the guide line, a window opening and closing system including a locking mechanism that locks the slide of the slider while applying a tension force to the traction chain can clearly confirm the closed position of the window body by locking the slide (vertical movement) of the slider by the locking mechanism, and the window body will not be left in an incompletely closed state, and the window body can be surely closed in a complete state. Since the window opening and closing system locks the slide of the slider while applying a tension force to the traction chain, the traction chain will not loosen, the window body can be hermetically closed, and the flow of air when the window body is closed can be prevented.

[0025] The locking mechanism is formed by an engaging cam formed at the lower end of the guide line and a pivoting lever rotatably installed at the lower end of the slider, having an engaging pin at the rotating base end located at the lower end of the slider and the engaging pin moving along the outer peripheral edge of the engaging cam. After moving the slider to the lower end of the guide line, the pivoting lever is rotated in either the forward or reverse direction, and the engaging pin is moved to a predetermined locking position along the outer peripheral edge of the engaging cam, thereby locking the slide of the slider with the tension chain applied with tension. When the slide of the slider is locked and the pivoting lever is rotated in the other of the forward or reverse direction, and the engaging pin is moved to a predetermined unlocking position along the outer peripheral edge of the engaging cam, the window opening and closing system enables the slide of the slider in the guide line. At the lower end of the guide line, the pivoting lever is rotated in either the forward or reverse direction, and the engaging pin is moved to a predetermined locking position along the outer peripheral edge of the engaging cam, locking the slide (vertical movement) of the slider while applying tension to the tension chain. By moving the engaging pin to the locking position, the closed position of the window body can be clearly confirmed, and the window body will not be left in an incompletely closed state, and the window body can be reliably closed in a complete state. Since the window opening and closing system locks the slide of the slider with the tension chain applied with tension, the tension chain will not loosen, the window body can be hermetically closed, and the air flow during the closing of the window body can be prevented. Since the window opening and closing system unlocks by rotating the pivoting lever in the other of the forward or reverse direction when the slide of the slider is locked and moving the engaging pin to a predetermined unlocking position along the outer peripheral edge of the engaging cam, the lock can be easily released from the locked state where the slide of the slider is locked, and the window body can be easily opened.

[0026] A window opening and closing system includes a stopper removably installed at a predetermined position on a guide line to stop the vertical sliding of a slider. By adjusting the installation position of the stopper on the guide line, the vertical sliding distance of the slider from the lower end of the guide line can be adjusted, and the downward turning angle of the free end of the window body from the upper frame can be adjusted. Since the downward turning angle of the free end of the window body from the upper frame can be adjusted by adjusting the installation position of the stopper on the guide line, the opening area of the window body during opening can be adjusted, and the air volume of the air flowing through the window body can be adjusted.

[0027] A window opening and closing system includes fixing means installed on a slider to fix the slider at a predetermined position on a guide line. During the process of sliding the slider vertically on the guide line, the slider can be fixed at a predetermined position on the guide line by using the fixing means. The window body can be opened with the free end of the window body turned downward from the upper frame at an arbitrary angle. By fixing the slider at a predetermined position on the guide line by using the fixing means, the window body can be opened with the free end of the window body turned downward from the upper frame at an arbitrary angle. Therefore, the opening area of the window body during opening can be adjusted by using the fixing means, and the air volume of the air flowing through the window body can be adjusted.

Brief Description of the Drawings

[0028]

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Best Mode for Carrying Out the Invention

[0029] Referring to the attached drawings such as FIG. 1 which is a front view of the window opening / closing system 10 shown as an example, the details of the window opening / closing system according to the present invention will be described as follows. Note that FIG. 2 is a top view of the window opening / closing system 10, and FIG. 3 is a partial enlarged front view showing the state where the window body 13a is open. In FIGS. 1 and 2, the vertical direction is indicated by arrow X, the horizontal direction is indicated by arrow Y, and the front-rear direction is indicated by arrow Z. In FIG. 1, two first and second window frames 12a, 12b and two first and second window bodies 13a, 13b are illustrated, but the number of window frames and window bodies is not particularly limited, and there may be one window frame or window body, or there may be three or more window frames or window bodies.

[0030] The window opening / closing system 10 (smoke exhaust operator) is normally used for air replacement (indoor ventilation), and in case of emergency (such as a fire), it is used as a smoke exhaust window for exhausting harmful smoke. The window opening / closing system 10 includes a first window frame 12a and a second window frame 12b, a first window body 13a (first shoji) installed on the first window frame 12a and a second window body 13b (second shoji) installed on the second window frame 12b, a first turning chain 14a for turning the first window body 13a and a second turning chain 14b for turning the second window body 13b, an erection unit 15 (chain box), a first drive unit 16a and a second drive unit 16b, and a chain operating means 17 for operating (extending or winding up) these turning chains 14a, 14b.

[0031] The chain operating means 17 is formed by a guideline 18 (slide line), a slider 19, a locking mechanism 20, a towing chain 21 (towing member), a first rotation mechanism 22a, and a second rotation mechanism 22b. The guideline 18, the slider 19, the locking mechanism 20, and the towing chain 21 are installed in the erection unit 15. The first rotation mechanism 22a is installed in the first drive unit 16a (see FIG. 2), and the second rotation mechanism 22b is installed in the second drive unit 16b (see FIG. 2).

[0032] The first window frame 12a and the second window frame 12b are installed at a high position (near the ceiling) of a predetermined building, and they are rectangular and of the same shape and size and are arranged side by side in the horizontal direction. These window frames 12a, 12b are formed by an upper frame 23 installed near the ceiling and extending straight in the horizontal direction, a lower frame 24 installed below the upper frame 23 and extending straight in the horizontal direction, and a first side frame 25a and a second side frame 25b extending straight in the vertical direction.

[0033] In these window frames 12a and 12b, the upper frame 23 and the lower frame 24 are spaced apart and opposed to each other in the vertical direction so as to be parallel to each other, and the first side frame 25a and the second side frame 25b are spaced apart and opposed to each other in the horizontal direction so as to be parallel to each other. In these window frames 12a and 12b, the upper and lower frames 23 and 24 and the first and second side frames 25a and 25b define two window (shoji) installation spaces that are rectangular, of the same shape, and of the same size and are long in the horizontal direction. There are no particular limitations on the size and shape of the first and second window frames 12a and 12b, and their size and shape can be freely designed.

[0034] The upper and lower frames 23 and 24 and the first and second side frames 25a and 25b are formed into a substantially angular shape (L-shaped). The upper frame 23 has an upper frame plate 26 that is located directly above the free ends 36 of the window bodies 13a and 13b and extends in the horizontal direction, and an upper contact plate 27 that extends in the horizontal direction orthogonally to the upper frame plate 26 and with which the rear surfaces of the free ends 36 of the window bodies 13a and 13b are airtightly in contact. The lower frame 24 has a lower frame plate 28 that is located directly below the rotating ends 35 of the window bodies 13a and 13b and extends in the horizontal direction, and a lower contact plate 29 that extends in the horizontal direction orthogonally to the lower frame plate 28 and with which the rear surfaces of the rotating ends 35 of the window bodies 13a and 13b are airtightly in contact.

[0035] The first side frame 25a has a first side frame plate 30 that is located on the side of the first side portions 37a of the window bodies 13a and 13b and extends in the vertical direction, and a first contact plate 31 that extends in the vertical direction orthogonally to the first side frame plate 30 and with which the rear surfaces of the first side portions 37a of the window bodies 13a and 13b are airtightly in contact. The second side frame 25b has a second side frame plate 32 that is located on the side of the second side portions 37b of the window bodies 13a and 13b and extends in the vertical direction, and a second contact plate 33 that extends in the vertical direction orthogonally to the second side frame plate 32 and with which the rear surfaces of the second side portions 37b of the window bodies 13a and 13b are airtightly in contact.

[0036] For the first and second window frames 12a and 12b, resin sashes, aluminum sashes, or aluminum-resin composite sashes are used. These window frames 12a and 12b are connected to the wall by existing connection means, and they are also connected to each other. Immediately below the first and second window frames 12a and 12b (the first and second window bodies 13a and 13b), there is installed an openable window facility 34 in which glass (glass shoji) is fitted into the window frame (resin sash, aluminum sash, or aluminum-resin composite sash). The window frames 12a and 12b and the window facility 34 are connected by existing connection means. Note that there may be a wall immediately below the first and second window frames 12a and 12b (the first and second window bodies 13a and 13b).

[0037] The first and second window bodies 13a and 13b (shoji) are rotatably attached to the first and second window frames 12a and 12b, and they are of the same shape and size, being rectangular and long in the horizontal direction and arranged side by side in the horizontal direction. The first and second window bodies 13a and 13b rotate from the closed state (closed position) to the open state (fully open position) and also rotate from the open state to the closed state. There are no particular limitations on the size and shape of the first and second window bodies 13a and 13b, and their size and shape can be freely designed according to the size and shape of the first and second window frames 12a and 12b.

[0038] These window bodies 13a and 13b have a rotatable end portion 35 (rotating frame) that is connected (installed) to the lower frame 24 of the window frames 12a and 12b and extends straight in the horizontal direction, a free end portion 36 (swing frame) that extends straight in the horizontal direction while being spaced apart and facing upward from the rotatable end portion 35, and a first side portion 37a (first lateral frame 37a) and a second side portion 37b (second lateral frame 37b) that extend straight in the vertical direction while being spaced apart and facing each other in the horizontal direction. At the horizontal center of these free end portions 36, a shoji fitting 38 is installed and fixed.

[0039] The rotating end portion 35 is airtightly adhered to the lower contact plate 29 of the lower frame 24 in the closed state (closed position) of the window bodies 13a, 13b, and the first and second side portions 37a, 37b are airtightly adhered to the first and second contact plates 31, 33 of the first and second side frames 25a, 25b in the closed state of the window bodies 13a, 13b. The free end portion 36 pivots to a closed position where it is airtightly adhered to the upper contact plate 27 of the upper frame 23 in the closed state, and pivots to a fully open position downward in the vertical direction in the open state. Glass is fitted into the window bodies 13a, 13b (inside the rotating end portion 35, the free end portion 36, and the first and second side portions 37a, 37b). The rotating end portion 35, the free end portion 36, and the first and second side portions 37a, 37b are made of a resin sash, an aluminum sash, or an aluminum-resin composite sash.

[0040] The first and second pivot chains 14a, 14b (roller chains) are made of a metal such as steel, stainless steel, or titanium. The tip end portion of the first pivot chain 14a is connected to the shoji fitting 38 of the free end portion 36 of the first window body 13a, and the tip end portion of the second pivot chain 14b is connected to the shoji fitting 38 of the free end portion 36 of the second window body 13b. These pivot chains 14a, 14b pivot the first and second window bodies 13a, 13b from the closed state to the open state, and also pivot these window bodies 13a, 13b from the open state to the closed state.

[0041] The first and second pivot chains 14a, 14b have a linearity (straight advancement) of moving in their axial direction (extending direction). When initially pivoting the first and second window bodies 13a, 13b from the closed state to the open state (at the start of pivoting), these chains 14a, 14b exert a feeding force (kicking force) that promotes the pivoting of the free end portion 36 due to their linearity, and when initially pivoting these window bodies 13a, 13b to the open state, a pivoting force is imparted to the free end portion 36 of these window bodies 13a, 13b.

[0042] In the window opening / closing system 10, the first and second turning chains 14a and 14b are fed out in one direction (forward in the front-rear direction), so that the free ends 36 of the first and second window bodies 13a and 13b that are airtightly adhered to the upper frame 23 pivot downward in the vertical direction about the rotation end 35, and the window bodies 13a and 13b pivot from the closed state (closed position) to the open state (fully open position) (see FIG. 13). The pivoting angles of the window bodies 13a and 13b downward in the vertical direction are different depending on the feeding dimensions of the first and second turning chains 14a and 14b, and the opening area when the window bodies 13a and 13b are opened can be adjusted by adjusting the feeding dimensions of the turning chains 14a and 14b. In the window opening / closing system 10, when the first and second turning chains 14a and 14b are drawn in the other direction (rearward in the front-rear direction), the free ends 36 of the first and second window bodies 13a and 13b that have pivoted downward in the vertical direction pivot upward in the vertical direction about the rotation end 35, and the window bodies 13a and 13b pivot from the open state (fully open position) to the closed state (closed position) (see FIG. 11).

[0043] FIG. 4 is a side view of the installation unit 15 shown as an example, FIG. 5 is a partially enlarged top view of the installation unit 15, FIG. 6 is a partially enlarged perspective view of the installation unit 15, and FIG. 7 is a partially enlarged view of the installation unit 15 showing an example of the lock mechanism 20. FIG. 8 is a partially enlarged view of the installation unit 15 following FIG. 7, and FIG. 9 is a partially enlarged top view of the drive units 16a and 16b showing an example of the rotation mechanisms 22a and 22b. FIG. 10 is a partially enlarged top view of the drive units 16a and 16b following FIG. 9. In FIG. 4, the cover plate 42 of the installation unit 15 is shown broken. In FIG. 6, the illustration of the engagement cam 69 is omitted. In FIGS. 9 and 10, the illustration of the window bodies 13a and 13b is omitted.

[0044] The installation unit 15 is made of a metal such as aluminum, stainless steel, or other alloys, or a synthetic resin, and extends straight downward from the second side frame 25b of the first window frame 12a. Incidentally, the installation unit 15 may extend straight downward from the first side frame 25a of the first window frame 12a, or the installation unit 15 may extend straight downward from the first side frame 25a of the second window frame 12b. Also, the installation unit 15 may extend straight downward from the second side frame 25b of the second window frame 12b.

[0045] The installation unit 15 is formed by first and second installation plates 39 and 40 that are identical in shape and size and extend in the vertical direction facing each other in the front-rear direction, a base plate 41 and a cover plate 42 that are located between the first and second installation plates 39 and 40 and extend in the vertical direction orthogonal to those installation plates 39 and 40, a first chain accommodation space 43 (first guide recess) that is located on the side of the first installation plate 39 and extends in the vertical direction parallel to the first installation plate 39, and a second chain accommodation space 44 (second guide recess) that is located on the side of the second installation plate 40 and extends in the vertical direction parallel to the second installation plate 40.

[0046] In the installation unit 15, the first and second installation plates 39 and 40 and the base plate 41 are integrally molded, and their cross-sectional shape is formed in a U shape. In the installation unit 15, an accommodation space 45 that is long in the vertical direction and surrounded by those plates 39 to 41 is defined. In the installation unit 15, the cover plate 42 is detachably installed on the first and second installation plates 39 and 40 that extend upward from the upper end 58 of the guide line 18, and covers the accommodation space 45 of the installation unit 15. The installation unit 15 has the first installation plate 39 connected and fixed to the second side frame 25a of the first window frame 12a and the window frame of the window equipment 34 by a predetermined connecting means (bracket, bolt and nut, rivet, welding, etc.).

[0047] The first chain accommodation space 43 (first guide recess) is formed by a first guide plate 46 extending vertically adjacent to the first erection plate 39, a second guide plate 47 extending vertically spaced from the first guide plate 46 toward the second erection plate 40, and a first guide base plate 48 located between the first and second guide plates 46, 47 and extending vertically. The first and second guide plates 46, 47 are formed in an angle shape (L shape). The first and second guide plates 46, 47 and the first guide base plate 48 are accommodated in the accommodation space 45 of the erection unit 15, and the first guide base plate 48 is connected and fixed to the base plate 41 of the erection unit 15 by a predetermined connecting means (bolts and nuts, rivets, welding, etc.). A traction chain 21 is accommodated in the first chain accommodation space 43 so as to be vertically movable (slidable).

[0048] The second chain accommodation space 44 (second guide recess) is formed by a third guide plate 49 extending vertically adjacent to the second erection plate 40, a fourth guide plate 50 extending vertically spaced from the third guide plate 49 toward the first erection plate 39, and a second guide base plate 51 located between the third and fourth guide plates 49, 50 and extending vertically. The third and fourth guide plates 49, 50 are formed in an angle shape (L shape). The third and fourth guide plates 49, 50 and the second guide base plate 51 are accommodated in the accommodation space 45 of the erection unit 15, and the second guide base plate 51 is connected and fixed to the base plate 41 of the erection unit 15 by a predetermined connecting means (bolts and nuts, rivets, welding, etc.). A traction chain 21 is accommodated in the second chain accommodation space 44 so as to be vertically movable (slidable). The second guide plate 47 of the first chain accommodation space 43 and the fourth guide plate 50 of the second chain accommodation space 44 are connected by a connecting plate 52, and the first chain accommodation space 43 and the second chain accommodation space 44 are integrally connected.

[0049] The first and second drive units 16a and 16b are made of metal such as aluminum, stainless steel, or other alloys, and are arranged above the upper frames 23 of the horizontally arranged (adjacent) window frames 12a and 12b and extend linearly in the horizontal direction. These drive units 16a and 16b include a first plate 53 and a third plate 55 that extend in the horizontal direction facing each other in the front-rear direction, a second plate 54 that is located between the first and third plates 53 and 55 and extends in the horizontal direction orthogonal to these plates, and bearing plates 56 that are located on the sides and in the center of the drive units 16a and 16b.

[0050] In the first and second drive units 16a and 16b, the first to third plates 53 to 55 are integrally formed, and their cross-sectional shape is formed in a U shape. In these drive units 16a and 16b, first and second long horizontal accommodation spaces 57a and 57b surrounded by the first to third plates 53 to 55 are defined. In the first and second drive units 16a and 16b, the first plate 53 is connected and fixed to the upper frame 23 of the window frames 12a and 12b by a predetermined connecting means (such as brackets, bolts and nuts, rivets, welding).

[0051] The guideline 18 is formed in the erection unit 15, is located below the window bodies 13a and 13b (the first and second window frames 12a and 12b), and extends downward from the second side frame 25b forming the first window frame 12a. Incidentally, the guideline 18 may extend downward from the second side frame 25b of the second window frame 12b, or may extend downward from the first side frame 25a of the first window frame 12a or the second window frame 12b. The guideline 18 can arbitrarily adjust (change) the vertical length dimension and can be set to a height at which it is easy to move the slider 19 up and down (a height at which it is easy to move the slider 19 up and down with little force). The guideline 18 has an upper end 58 (the lower end of the cover plate 42) located on the side of the window bodies 13a and 13b, a lower end 60 located on the ground side, and an intermediate portion 59 (moving space) extending in the vertical direction between the upper end 58 and the lower end 60.

[0052] The slider 19 is made of a metal such as aluminum, stainless steel, or other alloys, and is formed from an upper plate 61 shaped into a substantially plate-like shape that is long in the vertical direction and a lower plate 62 shaped into a substantially plate-like shape that is long in the vertical direction and located below the upper plate 61. The slider 19 is disposed in the middle portion 59 (moving space) of the guideline 18, and by sliding in the vertical direction within the first chain accommodation space 43 (first guide recess), it slides the middle portion 59 (the vertical center area of the erection unit 15) upward in the vertical direction from the lower end 60 to the upper end 58 of the guideline 18, and slides the middle portion 59 (the vertical center area of the erection unit 15) downward in the vertical direction from the upper end 58 to the lower end 60 of the guideline 18.

[0053] One end 63 of the towing chain 21 is connected to the upper end portion of the upper plate 61. A first connecting portion 64 extending in the front-rear direction orthogonal to the plate 61 is integrally formed at the lower end of the upper plate 61. A second connecting portion 65 extending in the front-rear direction orthogonal to the plate 62 and facing the first connecting portion 64 is integrally formed at the upper end of the lower plate 62. Thread holes 66 (threading holes) for screwing the threaded portion 68 of an adjustment screw 67 described later are formed in the first and second connecting portions 64, 65.

[0054] An adjustment screw 67 for adjusting the vertical separation dimension between the upper plate 61 and the lower plate 62 is installed at the first connecting portion 64 of the upper plate 61 and the second connecting portion 65 of the lower plate 62. The threaded portion 68 of the adjustment screw 67 is screwed into the threaded holes 66 (threading holes) of the first and second connecting portions 64, 65. A nut is screwed onto the threaded portion 68 of the adjustment screw 67.

[0055] For example, by rotating the adjustment screw 67 in the clockwise direction (positive direction), the first connecting portion 64 and the second connecting portion 65 gradually approach each other, and the vertical separation dimension between the upper plate 61 and the lower plate 62 can be shortened. By rotating the adjustment screw 67 in the counterclockwise direction (reverse direction), the first connecting portion 64 and the second connecting portion 65 gradually separate, and the vertical separation dimension between the upper plate 61 and the lower plate 62 can be lengthened.

[0056] Although not shown, a sliding piece (not shown) may be fixed to the lower surface of the slider 19. In this case, the sliding piece is slidably inserted (engaged) into the first chain accommodation space 43 (first guide recess) of the erection unit 15, and the slider 19 is disposed in the middle portion 59 (moving space) of the guide line 18. By the sliding piece sliding in the vertical direction in the first chain accommodation space 43, the slider 19 slides upward in the vertical direction in the middle portion 59 (the vertical center area of the erection unit 15) from the lower end 60 to the upper end 58 of the guide line 18, and the slider 19 slides downward in the vertical direction in the middle portion 59 from the upper end 58 to the lower end 60 of the guide line 18.

[0057] In addition, guide rails (guide grooves) are formed in the first guide plate 46 and the fourth guide plate 50 extending in the middle portion 59 (the vertical center area of the erection unit 15) of the guide line 18, and one side edge portion of the slider 19 is slidably engaged with the guide rail (guide groove) formed in the first guide plate 46, and the other side edge portion of the slider 19 may be slidably engaged with the guide rail (guide groove) formed in the fourth guide plate 50. By the one side edge portion and the other side edge portion of the slider 19 being slidably engaged with the guide rails, the slider 19 slides upward in the vertical direction in the middle portion 59 from the lower end 60 to the upper end 58 of the guide rail (guide line 18), and the slider 19 slides downward in the vertical direction in the middle portion 59 from the upper end 58 to the lower end 60 of the guide rail.

[0058] The locking mechanism 20 locks the slide (vertical movement) of the slider 19 in a state where a predetermined tension is applied to the towing chain 21 when the slider 19 is slid downward in the vertical direction and the slider 19 is positioned at the lower end 60 of the guide line 18. The locking mechanism 20 is formed of an engaging cam 69 (flat cam) and a turning lever 70 (turning handle) made of a metal such as aluminum, stainless steel, or other alloys.

[0059] The engaging cam 69 is disposed at the lower end 60 of the guideline 18 of the erection unit 15 and is connected (fixed) to the lower end 60 of the guideline 18 (the lower ends of the first and second erection plates 39, 40 and the base plate 41 of the erection unit 15) by a predetermined connecting means (such as bolts, rivets, welding, etc.). The engaging cam 69 has an outer peripheral edge 72 that slopes downward in a downward gradient in the vertical direction. Incidentally, the outer peripheral edge 72 may form an arc downward in the vertical direction.

[0060] The turning lever 70 is installed at the lower end of the lower plate 62 of the slider 19 and is formed by a rotary base end portion 73 and a gripping portion 74 (handle). The rotary base end portion 73 is rotatably attached to the lower end of the lower plate 62. The turning lever 70 turns (rotates) the gripping portion 74 in the turning direction (front-rear direction) (clockwise or counterclockwise direction) of the window body 13a around the rotary base end portion 73. On the side of the rotary base end portion 73 of the gripping portion 74 (handle), a turning arm 75 extending laterally (outward) from its side edge portion is integrally formed (connected). An engaging pin 76 that protrudes toward the base plate 41 of the erection unit 15 is formed on the turning arm 75. The engaging pin 76 engages with and disengages from the engaging cam 69.

[0061] When the turning arm 75 turns the gripping portion 74 (turning lever 70) in the counterclockwise direction, the tip 77 of the turning arm 74 abuts against the inner surface of the second erection plate 40 of the erection unit 15, and further turning of the gripping portion 74 in the counterclockwise direction stops. By adjusting the extension dimension of the turning arm 75 laterally (outward), the turning range of the gripping portion 74 (turning lever 70) in the counterclockwise direction can be adjusted. By adjusting the turning range of the gripping portion 74 in the counterclockwise direction, unnecessary turning of the turning arm 75 in the counterclockwise direction can be prevented, and the operability of the slider 19 by the turning lever 70 can be improved.

[0062] The engaging pin 76 rotates (turns) in the turning direction (front-rear direction) (clockwise direction or counterclockwise direction) of the window body 13a together with the turning arm 75 as the holding part 74 (swing lever 70) turns (rotates). In the swing lever 70, the engaging pin 76 moves slidably along the outer peripheral edge 72 of the engaging cam 69. While pressing (pushing down) the holding part 74 (swing lever 70) downward in the vertical direction and applying a turning force to the holding part 74 (handle), the engaging pin 76 slides (gets over) along the outer peripheral edge 72 of the engaging cam 69 in one direction and can slide (get over) along the outer peripheral edge 72 of the engaging cam 69 in the other direction. The engaging pin 76 engages with the engaging cam 69 in a state where it has moved (got over) along the outer peripheral edge 72 of the engaging cam 69 in one direction.

[0063] In the window opening / closing system 10, the position of the engaging pin 76 relative to the outer peripheral edge 72 of the engaging cam 69 is adjusted so that the engaging pin 76 can slide (get over) along the outer peripheral edge 72 in one direction or the other. By rotating the adjusting screw 67 of the slider 19 in the counterclockwise direction (reverse direction) to increase the vertical separation dimension between the upper plate 61 and the lower plate 62, while weakening the tension acting on the towing chain 21, the engaging pin 76 of the swing lever 70 can be made to slide (get over) easily along the outer peripheral edge 72 of the engaging cam 69 in one direction or the other. By rotating the adjusting screw 67 of the slider 19 in the clockwise direction (forward direction) to shorten the vertical separation dimension between the upper plate 61 and the lower plate 62, the tension acting on the towing chain 21 can be increased. On the other hand, force is required when the engaging pin 76 of the swing lever 70 slides (gets over) along the outer peripheral edge 72 of the engaging cam 69 in one direction or the other. By adjusting the length of the vertical separation dimension between the upper plate 61 and the lower plate 62, the tension acting on the towing chain 21 can be increased or decreased. Therefore, the degree of adhesion of the free end 36 to the contact plate 27 in the closed state of the first and second window bodies 13a, 13b can be adjusted, and the airtightness in the closed state of the window opening / closing system 10 can be adjusted.

[0064] In the window opening / closing system 10, by adjusting the vertical separation dimension between the upper plate 61 and the lower plate 62 using the adjustment screw 67, when locking the slide (vertical movement) of the slider 19, an optimal tension can be applied to the traction chain 21, and the engaging pin 76 of the swivel lever 70 can slide (override) along the outer peripheral edge 72 of the engaging cam 69 in one direction or the other direction with an appropriate force.

[0065] The traction chain 21 (traction member) is made of a metal such as steel, stainless steel, or titanium, and one end portion 63 thereof is connected to the upper end portion of the upper plate 61 of the slider 19 and is accommodated in the first chain accommodation space 43 (first guide recess) and the second chain accommodation space 44 (second guide recess) and extends in the vertical direction. The traction chain 21 moves up and down in the first chain accommodation space 43 and the second chain accommodation space 44 as the slider 19 slides (moves up and down) in the vertical direction. Incidentally, the other end portion 78 (free end) of the traction chain 21 is located in the second chain accommodation space 44 (second guide recess) and hangs downward from a sprocket 80 described later.

[0066] When the slider 19 slides upward in the vertical direction in the middle portion 59 (vertical center area of the erection unit 15) from the lower end 60 to the upper end 58 of the guide line 18, the one end portion 63 thereof moves upward in the vertical direction in conjunction therewith, and the entire traction chain 21 operates in the vertical direction. When the slider 19 slides downward in the vertical direction in the middle portion 59 from the upper end 58 to the lower end of the guide line 18, the one end portion 63 thereof moves downward in the vertical direction in conjunction therewith, and the entire traction chain 21 operates in the vertical direction.

[0067] The first and second rotating mechanisms 22a and 22b are interlocked with the vertical movement of the traction chain 21 caused by the vertical sliding of the slider 19, feed out the first and second turning chains 14a and 14b in one direction (forward in the front-rear direction), and take in (wind up) the turning chains 14a and 14b in the other direction (rearward in the front-rear direction). The first rotating mechanism 22a is formed by a first rod 79a, a sprocket 80, a first roller 81a, a first ring mounting drum 82a, and a first torsion spring 83a. The first rod 79a, the sprocket 80, the first roller 81a, the first ring mounting drum 82a, and the first torsion spring 83a are installed (accommodated) in the first accommodation space 57a of the first drive unit 16a.

[0068] The second rotating mechanism 22b is formed by a second rod 79b, a second roller 81b, a second ring mounting drum 82b, and a second torsion spring 83b. The second rod 79b, the second roller 81b, the second ring mounting drum 82b, and the second torsion spring 83b are installed (accommodated) in the second accommodation space 57b of the second drive unit 16b.

[0069] The first and second rods 79a and 79b are made of a metal such as aluminum, stainless steel, or other alloys or synthetic resin, and are formed in a cylindrical shape. The first and second rods 79a and 79b are rotatably accommodated in the first and second accommodation spaces 57a and 57b of the first and second drive units 16a and 16b (rotatably installed in the window frames 12a and 12b) and extend in the lateral direction.

[0070] One end portion and the middle portion of the first rod 79a are rotatably supported by the bearing plate 56 of the first drive unit 16a. One end portion and the middle portion of the second rod 79b are rotatably supported by the bearing plate 56 of the second drive unit 16b. The first and second rods 79a and 79b are connected and integrated at their other end portions. Therefore, when one of the first and second rods 79a and 79b rotates in the clockwise direction (positive direction), the other also rotates in the clockwise direction (positive direction), and when one rotates in the counterclockwise direction (negative direction), the other also rotates in the counterclockwise direction (negative direction).

[0071] The sprocket 80 is made of a metal such as carbon steel, rolled steel, stainless steel, sintered alloy, or synthetic resin, and is attached to the other end of the first rod 79a. The traction chain 21 is engaged with the teeth of the sprocket 80. The sprocket 80 rotates in the clockwise direction (positive direction) or counterclockwise direction (reverse direction) as the traction chain 21 moves up and down, and transmits the rotational force to the first and second rods 79a, 79b.

[0072] The outer diameter dimension of the sprocket 80 is adjustable. Under the condition that the peripheral speed of the sprocket 80 (the speed of the slider 19) is the same, by increasing the outer diameter of the sprocket 80, the ratio of the diameter of the sprocket 80 to the diameters of the first and second rods 79a, 79b increases, and the force (the force to push the slider downward) required to pivot the window bodies 13a, 13b upward in the vertical direction from the open state to the closed state can be reduced. On the other hand, since the total number of rotations of the first and second rods 79a, 79b required to change the window bodies 13a, 13b from the open state to the closed state remains unchanged, the vertical movement dimension of the slider 19 increases by the amount of the increase in the outer diameter dimension of the sprocket 80. Conversely, by decreasing the outer diameter of the sprocket 80, the ratio of the diameter of the sprocket 80 to the diameters of the first and second rods 79a, 79b decreases, and the force (the force to push the slider downward) required to pivot the window bodies 13a, 13b upward in the vertical direction from the open state to the closed state increases, while the vertical movement dimension of the slider 19 decreases.

[0073] By increasing the outer diameter of the sprocket 80, the window opening and closing system 10 increases the vertical movement dimension of the slider 19 between the closed state and the open state of the first and second window bodies 13a, 13b. However, the slider 19 can be slid downward in the vertical direction without requiring a large force, and the window bodies 13a, 13b can be easily pivoted from the closed state to the open state and from the open state to the closed state.

[0074] The window opening / closing system 10 requires force to slide the slider 19 downward in the vertical direction by reducing the outer diameter of the sprocket 80. However, the vertical movement dimension (slide distance) of the slider 19 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 pivoted from the closed state to the open state by sliding the slider 19 only a short distance, and the window bodies 13a, 13b can be pivoted from the open state to the closed state.

[0075] The first and second rollers 81a, 81b are made of a synthetic resin or a metal such as aluminum, stainless steel, or other alloys, and are formed in a cylindrical shape. The first roller 81a is housed in the first accommodation space 57a of the first drive unit 16a and is installed (fitted) at the middle part of the first rod 79a. The second roller 81b is housed in the second accommodation space 57b of the second drive unit 16b and is installed (fitted) at the middle part of the second rod 79b.

[0076] The first roller 81a rotates in the clockwise direction (positive direction) or the counterclockwise direction (negative direction) as the first rod 79a rotates, and the second roller 81b rotates in the clockwise direction (positive direction) or the counterclockwise direction (negative direction) as the second rod 79b rotates. The other end of the first pivot chain 14a is connected and fixed to the first roller 81a, and the other end of the second pivot chain 14b is connected and fixed to the second roller 81b.

[0077] When looking at the sprocket 80 from the side of the other end of the first rod 79a, as the first roller 81a rotates counterclockwise, as shown in FIG. 9, the first turning chain 14a is drawn in the other direction (rearward in the front-rear direction) by the first roller 81a. When the first roller 81a rotates clockwise, as shown in FIG. 10, the first turning chain 14a is fed out from the first roller 81a in one direction (forward in the front-rear direction). When looking at the sprocket 80 from the side of the other end of the second rod 79b, as the second roller 81b rotates clockwise, the second turning chain 14b is drawn in the other direction (rearward in the front-rear direction) by the second roller 81b. When the second roller 81b rotates counterclockwise, the second turning chain 14b is fed out from the second roller 81b in one direction (forward in the front-rear direction).

[0078] The first and second ring mounting drums 82a and 82b are made of a synthetic resin or a metal such as aluminum, stainless steel, or other alloys, and are formed in a cylindrical shape. The first ring mounting drum 82a is housed in the first accommodation space 57a of the first drive unit 16a and is installed (fitted) on the side of one end of the first rod 79a (laterally outward of the first roller 81a). The second ring mounting drum 82b is housed in the second accommodation space 57b of the second drive unit 16b and is installed (fitted) on the side of one end of the second rod 79b (laterally outward of the second roller 81b).

[0079] In addition, depending on the size and shape of the window bodies 13a and 13b, the first ring mounting drum 82a may be installed (fitted) in the middle part of the first rod 79a, and the first roller 81a may be installed (fitted) on the side of one end of the first rod 79a (laterally outward of the first ring mounting drum 82a). The second ring mounting drum 82b may be installed (fitted) in the middle part of the second rod 79b, and the second roller 81b may be installed (fitted) on the side of one end of the second rod 79b (laterally outward of the second ring mounting drum 82b).

[0080] The first and second torsion springs 83a and 83b are made of hard steel wire, stainless steel wire, or phosphor bronze for springs. The first torsion spring 83a is attached to the first ring attachment drum 82a and extends in the axial direction of the first rod 79a. The second torsion spring 83b is attached to the second ring attachment drum 82b and extends in the axial direction of the second rod 79b. The arm shapes of these torsion springs 83a and 83b can use short hooks, straight shapes, single-bend shapes, etc. The outer diameter, inner diameter, and number of turns of these torsion springs 83a and 83b can be arbitrarily set according to the torque required for the upward rotation of the first and second window bodies 13a and 13b (shoji) in the vertical direction (the auxiliary force required for the downward slide of the slider 19 in the vertical direction).

[0081] In the first rotation mechanism 22a, with the first ring attachment drum 82a inserted through the first torsion spring 83a, the fixed point of the arm of the first torsion spring 83a is connected and fixed to any one of the first plate to the third plate 53 to 55 and the bearing plate 56 of the first drive unit 16a, and the load point of the arm of the first torsion spring 83a is connected and fixed to the outer peripheral edge of the first rod 79a.

[0082] In the second rotation mechanism 22b, with the second ring attachment drum 82b inserted through the second torsion spring 83b, the fixed point of the arm of the second torsion spring 83a is connected and fixed to any one of the first plate to the third plate 53 to 55 and the bearing plate 56 of the second drive unit 16b, and the load point of the arm of the second torsion spring 83b is connected and fixed to the outer peripheral edge of the second rod 79b.

[0083] The first and second torsion springs 83a and 83b are twisted in the winding direction or in the direction opposite to the winding direction when the first and second rods 79a and 79b rotate in the clockwise direction and the first and second turning chains 14a and 14b are fed out from the first and second rollers 81a and 81b in one direction (forward in the front-rear direction). When the first and second torsion springs 83a and 83b are twisted in the direction opposite to the winding direction, they generate torque (repulsive force) in the opposite direction (winding direction) proportional to the twisted angle, and when they are twisted in the winding direction, they generate torque (repulsive force) in the opposite direction (opposite to the winding direction) proportional to the twisted angle. In the window opening / closing system 10, the torques (outer diameter, inner diameter, number of turns, repulsive coefficient) of the first and second torsion springs 83a and 83b are adjusted so that the load acting on the slider 19 when the window bodies 13a and 13b are pivoted upward from the lower side in the vertical direction is about 1.5 to 2 kg.

[0084] FIG. 11 is a partially enlarged side view of the window opening / closing system 10 with the window bodies 13a and 13b closed, and FIG. 12 is a partially enlarged side view of the window opening / closing system 10 similar to FIG. 11 shown in cross section. FIG. 13 is a partially enlarged side view of the window opening / closing system 10 with the window bodies 13a and 13b open, and FIG. 14 is a partially enlarged side view of the window opening / closing system 10 similar to FIG. 13 shown in cross section. FIGS. 12 and 14 show the traction chain 21 (traction member) in an exposed state.

[0085] An example of the procedure for opening the window bodies 13a and 13b by pivoting the free ends 36 of the first and second window bodies 13a and 13b downward in the vertical direction from the closed state is as follows. The window opening and closing system 10 is manually operated by a person entering or leaving the building in which it is installed. Incidentally, in the state where the first and second window bodies 13a and 13b are closed, the first and second pivot chains 14a and 14b are pulled (wound up) in the other direction (backward in the front-rear direction) at the first and second rollers 81a and 81b, the free ends 36 of the window bodies 13a and 13b pivot to the closed position, the rotating ends 35 are airtightly in close contact with the lower frame 24, the first and second side portions 37a and 37b are airtightly in close contact with the first and second side frames 25a and 25b, and the free ends 36 are airtightly in close contact with the upper frame 23.

[0086] Furthermore, the slider 19 is positioned at the lower end 60 of the guide line 18, the engaging pin 76 of the pivot lever 70 slides (crosses over) along the outer peripheral edge 72 of the engaging cam 69 in one direction, the engaging pin 76 moves to the locking position, and the sliding (vertical movement) of the slider 19 is locked with the tension applied to the towing chain 21. In the state where the sliding of the slider 19 is locked, as shown in FIG. 7, the pivot lever 70 hangs downward from the lower end 60 of the guide line 18.

[0087] First, while holding the gripping portion 74 (handle) of the pivot lever 70, apply a pivoting force in the counterclockwise direction (opposite direction) to the gripping portion 74 of the pivot lever 70 while pressing (pushing down) the pivot lever 70 downward in the vertical direction. By applying a pivoting force to the gripping portion 74, the pivot arm 75 and the engaging pin 76 pivot in the counterclockwise direction (opposite direction), and the engaging pin 76 slides (crosses over) along the outer peripheral edge 72 of the engaging cam 69 in the other direction, the engaging pin 76 moves to the unlocking position, and the engagement between the engaging pin 76 and the engaging cam 69 is released. When the engaging pin 76 is moved to the unlocking position, the lock on the sliding (vertical movement) of the slider 19 is released, and the tension acting on the towing chain 21 is released.

[0088] When the gripping portion 74 of the swivel lever 70 is swiveled counterclockwise, the swivel arm 75 is also swiveled counterclockwise (in the reverse direction). As shown in FIG. 8, the tip 77 of the swivel arm 75 abuts against the inner surface of the second installation plate 40 of the installation unit 15. When the tip 77 of the swivel arm 75 abuts against the inner surface of the second installation plate 40, the counterclockwise swiveling of the gripping portion 74 (swivel lever 70) stops at that point.

[0089] The swivel lever 70 (gripping portion 74) is unlocked by swiveling 15 to 20° counterclockwise (in the reverse direction) from the state shown in FIG. 7 where it hangs downward from the lower end 60 of the guideline 18. The extension dimension of the swivel arm 75 and the positional relationship between the engagement cam 69 and the engagement pin 76 are adjusted accordingly. Further, the extension dimension of the swivel arm 75 is adjusted so that the tip 77 of the swivel arm 75 abuts against the inner surface of the second installation plate 40 of the installation unit 15 when it is swiveled 15 to 20° counterclockwise (in the reverse direction).

[0090] Next, while gripping the gripping portion 74 (handle) of the swivel lever 70, the slider 19 is slid (pushed up) upward in the vertical direction from the lower end 60 to the upper end 58 of the guideline 18 together with the swivel lever 70. When the slider 19 is slid upward in the vertical direction, the towing chain 21 located in the first chain accommodating portion 43 operates upward in conjunction with the sliding of the slider 19, and the sprocket 80 engaged with the towing chain 21 rotates clockwise. When the sprocket 80 rotates, the first and second rods 79a, 79b (rotating mechanisms 22a, 22b) rotate clockwise in conjunction with it, and the first and second rollers 81a, 81b rotate clockwise as the first and second rods 79a, 79b rotate. When the first and second rollers 81a, 81b rotate clockwise, as shown in FIGS. 13 and 14, the first and second swivel chains 14a, 14b are fed out from the first and second rollers 81a, 81b in one direction (forward in the front-rear direction).

[0091] When the first and second window bodies 13a and 13b are pivoted from the closed state to the open state at the start of movement (start of pivoting), when the first and second pivot chains 14a and 14b are fed out from the first and second rollers 81a and 81b in one direction (forward in the front-rear direction), due to the linearity (straightness) of these pivot chains 14a and 14b, they exert a feeding force (kicking force) that promotes (facilitates) the downward pivoting in the vertical direction of the free ends 36 of the first and second window bodies 13a and 13b. The free ends 36 of the first and second window bodies 13a and 13b are pressed (pushed out) forward in the front-rear direction by these pivot chains 14a and 14b, and a downward pivoting force in the vertical direction is applied to the free ends 36 of these window bodies 13a and 13b.

[0092] The first and second window bodies 13a and 13b pivot using the feeding force of the first and second pivot chains 14a and 14b when the free ends 36 of these window bodies 13a and 13b pivot from the closed position to the open position at the start of movement. In the pivoting process except at the start of movement, the free ends 36 of the window bodies 13a and 13b automatically pivot downward in the vertical direction about the rotation end 35 due to the self-weight of the window bodies 13a and 13b. When the free ends 36 of the first and second window bodies 13a and 13b automatically pivot downward in the vertical direction, the first and second pivot chains 14a and 14b are automatically fed out in one direction (forward in the front-rear direction), the first and second rods 79a and 79b (rotation mechanisms 22a and 22b) automatically rotate in the clockwise direction, and the sprocket 80 automatically rotates in the clockwise direction. Further, the towing chain 21 automatically operates upward, and the slider 19 automatically slides upward toward the upper end 58 of the guide line 18.

[0093] When the first turning chain 14a is fed out from the first roller 81a in one direction (forward in the front-rear direction) and the first rod 79a (the first ring mounting drum 82a) rotates in the clockwise direction, the first torsion spring 83a twists with the fixed point of its arm as the twisted base end, and the load point of the arm twists in the direction opposite to the winding direction or in the winding direction. When the second turning chain 14b is fed out from the second roller 81b in one direction (forward in the front-rear direction) and the second rod 79b (the second ring mounting drum 82b) rotates in the clockwise direction, the second torsion spring 83b twists with the fixed point of its arm as the twisted base end, and the load point of the arm twists in the direction opposite to the winding direction or in the winding direction.

[0094] When the first and second torsion springs 83a and 83b twist in the direction opposite to the winding direction or in the winding direction, they generate torque in the opposite direction (the winding direction or the direction opposite to the winding direction) proportional to the twisted angle, and due to the torque of these torsion springs 83a and 83b, a turning force is applied to the free ends 36 of the first and second window bodies 13a and 13b to turn upward in the vertical direction from the open position to the closed position.

[0095] The window opening and closing system 10 slides the slider 19 upward in the vertical direction from the lower end 60 to the upper end 58 of the guide line 18 in the middle part 59 (the vertical central area of the erection unit 15) to operate the traction chain 21 (traction member) upward in the vertical direction. By the upward operation of the traction chain 21, the sprocket 80 (the rotation mechanisms 22a and 22b) is rotated to feed out the first and second turning chains 14a and 14b from the first and second rollers 81a and 81b, and the first and second window bodies 13a and 13b are rotated from the closed state to the open state. Therefore, by simply sliding the slider 19 upward in the vertical direction, the window bodies 13a and 13b can be rotated from the closed state to the open state without taking much effort and time, and the first and second window bodies 13a and 13b can be smoothly rotated from the closed state to the open state to easily open them.

[0096] The window opening / closing system 10 utilizes the payout force (torque) of the first and second turning chains 14a and 14b to turn the free ends 36 of the first and second window bodies 13a and 13b as they pivot from the closed position to the open position. During the pivoting process except for the initial movement, the free ends 36 of the window bodies 13a and 13b automatically pivot downward in the vertical direction due to the self-weight of the window bodies 13a and 13b. By utilizing the payout force of the first and second turning chains 14a and 14b, the window bodies 13a and 13b can be reliably pivoted when the slider 19 is slid upward in the vertical direction at the initial movement, and the window bodies 13a and 13b can be smoothly pivoted from the closed state to the open state by the upward sliding operation of the slider 19, making it easy to open the window bodies 13a and 13b. The window opening / closing system 10 pivots the free ends 36 of the window bodies 13a and 13b by the payout force (torque) of the first and second turning chains 14a and 14b at the initial movement, and during the pivoting process except for the initial movement, the free ends 36 of the first and second window bodies 13a and 13b automatically pivot downward in the vertical direction due to the self-weight of the first and second window bodies 13a and 13b, enabling the window bodies 13a and 13b to be opened all at once without requiring the sliding operation of the slider 19 in an emergency.

[0097] When the window opening / closing system 10 rotates the gripping portion 74 (swing lever 70) counterclockwise (either forward or reverse) with the slide of the slider 19 locked and moves the engagement pin 76 to the unlocking position where it slides (crosses over) the outer peripheral edge 72 of the engagement cam 69, the lock is released. Thus, the lock can be easily released from the locked state where the slide of the slider 19 is locked, and the first and second window bodies 13a and 13b can be easily opened.

[0098] Since the window opening / closing system 10 releases the lock by pivoting the gripping portion 74 (swing lever 70) by 15 - 20° from the state where the slide of the slider 19 is locked, the lock can be easily and quickly released without significantly pivoting the gripping portion 74 (swing lever 70) (for example, pivoting by 90°) from the state where the slide of the slider 19 is locked.

[0099] An example of the procedure for closing the window bodies 13a and 13b by pivoting the free ends 36 of the window bodies 13a and 13b upward in the vertical direction from the state where the first and second window bodies 13a and 13b are open is as follows. While gripping the gripping portion 74 (handle) of the pivot lever 70, the slider 19 is slid (pushed down) downward in the vertical direction together with the pivot lever 70 from the upper end 58 to the lower end 60 of the guide line 18. Incidentally, due to the torque (repulsive force) of the first and second torsion springs 83a and 83b, the load (kg) acting on the slider 19 when pivoting the window bodies 13a and 13b upward from the lower direction to the upper direction in the vertical direction is adjusted to about 1.5 to 2 kg.

[0100] When the slider 19 is slid downward, the traction chain 21 operates downward in the vertical direction in conjunction with the slide of the slider 19, and the sprocket 80 engaged with the traction chain 21 rotates in the counterclockwise direction. When the sprocket 80 rotates, the first and second rods 79a and 79b (rotation mechanisms 22a and 22b) rotate in the counterclockwise direction in conjunction with it, and the first and second pivot chains 14a and 14b are wound around the first and second rollers 81a and 81b in the other direction (rearward in the front-rear direction).

[0101] As the first and second pivot chains 14a and 14b are wound around the first and second rollers 81a and 81b, the free ends 36 of the first and second window bodies 13a and 13b start to pivot upward in the vertical direction from the open position toward the closed position. Since the torque of the first and second torsion springs 83a and 83b applies a pivoting force to the free ends 36 of the first and second window bodies 13a and 13b to pivot from the open position toward the closed position, the entire weight of the window bodies 13a and 13b does not act on the slide of the slider 19, and a load (in the range of 1.5 to 2 kg) obtained by subtracting the repulsive force of the torsion springs 83a and 83b from the weight of the window bodies 13a and 13b acts on the slider 19.

[0102] By sliding (pushing down) the slider 19 to the lower end 60 of the guide line 18, 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 83a, 83b returns, and the torque of these torsion springs 83a, 83b becomes zero. After sliding the slider 19 to the lower end 60 of the guide line 18, while holding the gripping portion 74 of the pivot lever 70, while pressing (pushing down) the pivot lever 70 downward in the vertical direction, a turning force is applied to the gripping portion 74 in the clockwise direction (positive direction).

[0103] By applying a turning force to the gripping portion 74 and pivoting the pivot lever 70 15 - 20° in the clockwise direction (positive direction), the engagement pin 76 pivots in the clockwise direction (positive direction), and the engagement pin 76 slides (overcomes) along the outer peripheral edge 72 of the engagement cam 69 in one direction, the engagement pin 76 moves to the lock position, and the engagement pin 76 engages with the engagement cam 69. When the engagement pin 76 is moved to the lock position, the pivot lever 70 hangs downward from the lower end 60 of the guide line 18, a tension force is applied to the traction chain 21, and the sliding (vertical movement) of the slider 19 is locked. When the engagement pin 76 moves to the lock position and a tension force is applied to the traction chain 21, the rotating end portion 35 adheres airtightly to the lower frame 24, the first and second side portions 37a, 37b adhere airtightly to the first and second side frames 25a, 25b, and the free end portion 36 adheres airtightly to the upper frame 23.

[0104] The window opening / closing system 10 slides the slider 19 downward from the upper end 58 of the guide line 18 to operate the traction chain 21 (traction member) downward in the vertical direction. By the downward operation of the traction chain 21, the sprocket 80 (rotating mechanisms 22a, 22b) is rotated to wind the first and second turning chains 14a, 14b around the first and second rollers 81a, 81b, and the first and second window bodies 13a, 13b are pivoted from the open state to the closed state. Therefore, by simply sliding the slider 19 downward in the vertical direction, the window bodies 13a, 13b can be pivoted from the open state to the closed state without taking much labor and time, and the first and second window bodies 13a, 13b can be smoothly pivoted from the open state to the closed state to easily close them. When closing the opened window bodies 13a, 13b, the window opening / closing system 10 does not need to rotate the winding handle many times as in the prior art. It only needs to slide the slider 19 downward in the vertical direction, and the window bodies 13a, 13b in the open state can be closed in a short time by a simple sliding operation.

[0105] When the window opening / closing system 10 closes the opened window bodies 13a, 13b, it rotates the gripping portion 74 of the turning lever 70 in the clockwise direction (positive direction) at the lower end 60 of the guide line 18, moves the engaging pin 76 of the turning lever 70 to the locking position where it slides (crosses over) the outer peripheral edge 72 of the engaging cam 69, and locks the sliding (vertical movement) of the slider 19 while applying tension to the traction chain 21. Therefore, by moving the engaging pin 76 to the locking position, the closing 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, and the window bodies 13a, 13b can be reliably and airtightly closed in a complete state.

[0106] The window opening / closing system 10 locks the slide of the slider 19 with the traction chain 21 under tension, so the traction chain 21 will not slacken, and the first and second window bodies 13a, 13b can be hermetically closed, preventing the flow of air when those window bodies 13a, 13b are closed. The window opening / closing system 10 can lock the slide of the slider 19 by turning the gripping part 74 of the swivel lever 70 by 15 - 20° from the state where the lock of the slider 19 is released. Therefore, without turning the gripping part 74 of the swivel lever 70 greatly (for example, turning by 90°) from the state where the lock of the slider 19 is released, the slide of the slider 70 can be simply and quickly locked.

[0107] When closing the first and second window bodies 13a, 13b in the open state without using the first and second torsion springs 83a, 83b, a considerable force is required to slide the slider 19 downward in the vertical direction due to the self - weight of those window bodies 13a, 13b. However, in the window opening / closing system 10, the torque (repulsive force) of those torsion springs 83a, 83b promotes the winding of the first and second swivel chains 14a, 14b around the first and second rollers 81a, 81b, and the torque of those torsion springs 83a, 83b is adjusted so that the load acting on the slider 19 when the window bodies 13a, 13b are pivoted upward from the downward direction in the vertical direction is about 1.5 - 2 kg. Therefore, by using those torsion springs 83a, 83b, the slider 19 can be easily slid downward in the vertical direction without requiring a large force, and the first and second window bodies 13a, 13b can be smoothly pivoted from the open state to the closed state, and the window bodies 13a, 13b can be easily closed.

[0108] FIG. 15 is a side view of the installation unit 15 shown as another example, and FIG. 16 is a side view of the installation unit 15 shown in a state where the slider 19 is in contact with the stopper 84. FIG. 17 is a partially enlarged view of the installation unit 15 showing a state where the slider 19 is fixed to a predetermined position on the guideline 18 by the set screw 85, and FIG. 18 is a cross-sectional view taken along the line A-A of FIG. 17. The difference between the installation unit 15 shown in FIGS. 15 to 18 and that in FIG. 4 lies in that a stopper 84 is installed at a predetermined position on the guideline 18 of the installation unit 15 and a set screw 85 (fixing means) is installed on the slider 19.

[0109] Since the other configurations of the window opening and closing system 11 provided with the installation unit 15 in FIGS. 15 to 18 are the same as those of the window opening and closing system 10 in FIG. 1, the description in FIG. 1 is incorporated by reference for the other configurations of the window opening and closing system 11. In addition, since the configuration of the installation unit 15 is the same as that in FIG. 4, the description in FIG. 4 is incorporated by reference and the same reference numerals as those in FIG. 4 are used, and the description of the configuration of the installation unit 15 is omitted.

[0110] A stopper 84 is detachably attached to the guideline 18 of the installation unit 15. The stopper 84 is installed at a predetermined position (base plate 41 or connecting plate 52) in the middle part 59 (moving space) of the guideline 18 by a predetermined connecting means. The upper end of the upper plate 61 of the slider 19 that slides upward in the vertical direction abuts against the stopper 84. When the upper end of the upper plate 61 abuts against the stopper 84, the further upward sliding of the slider 19 stops.

[0111] The installation position of the stopper 84 in the middle part 59 (moving space) of the guideline 18 can be arbitrarily determined. By adjusting the installation position of the stopper 84 in the middle part 59 of the guideline 18, the vertical movement distance (slide distance) of the slider 19 on the guideline 18 can be adjusted, and the downward turning angles (opening areas) of the first and second window bodies 13a and 13b in the vertical direction can be adjusted.

[0112] When the lock on the slide (vertical movement) of the slider 19 is released and the slider 19 is slid upward in the vertical direction from the lower end 60 to the upper end 58 of the guideline 18 together with the swivel lever 70, during the swiveling process, due to the self-weight of the first and second window bodies 13a, 13b, the free ends 36 of the window bodies 13a, 13b automatically swivel downward in the vertical direction around the rotating end 35, and at the same time, the slider 19 automatically slides upward toward the upper end 58 of the guideline 18. However, when the upper end of the upper plate 61 of the slider 19 abuts against the stopper 84, the slide of the slider 19 on the guideline 18 stops. At that point, the upward operation of the traction chain 21 in the vertical direction stops, the clockwise rotation of the sprocket 80 stops, and the payout of the first and second swivel chains 14a, 14b in one direction (forward in the front-rear direction) stops.

[0113] When the slider 19 abuts against the stopper 84 and the payout of the swivel chains 14a, 14b stops, the downward swiveling of the free ends 36 of the first and second window bodies 13a, 13b in the vertical direction stops. The downward swiveling angles of the first and second window bodies 13a, 13b are different depending on the installation position of the stopper 84 in the middle part 59 (moving space) of the guideline 18, and the opening areas of these window bodies 13a, 13b when they are opened are different.

[0114] The stop screw 85 (fixing means) is made of metal such as aluminum, stainless steel, or other alloys, or synthetic resin, and is formed by an operation part 86 (head), a screw part 87, and a slide stop roller 88. In the stop screw 85, the top of the screw part 87 is fixed to the operation part 86, and the slide stop roller 88 is inserted and fixed to the bottom of the screw part 87. The screw part 87 is screwed into a screw hole (threaded hole) formed in the upper plate 61 of the slider 19. When the operation part 86 of the stop screw 85 is rotated in the clockwise direction (positive direction), the screw part 87 moves forward (moves) toward the connection plate 52 (base plate 41) of the erection unit 15. When the operation part 86 of the stop screw 85 is rotated in the counterclockwise direction (negative direction), the screw part moves backward (moves) in a direction away from the connection plate 52 (base plate 41) of the erection unit 15.

[0115] To use the stop screw 85, while gripping the swivel lever 70, in the process of gradually sliding the slider 19 upward in the vertical direction from the lower end 60 to the upper end 58 of the guide line 18 together with the swivel lever 70, the slide of the slider 19 is stopped at a predetermined position of the guide line 18. When the slide of the slider 18 is stopped, the operation part 86 of the stop screw 85 is rotated in the counterclockwise direction (negative direction) to retract the screw part 87 away from the connection plate 52 (base plate 41) of the erection unit 15. When the screw part 87 is retracted, the tapered part of the slide stop roller 88 attached to the screw part 87 abuts against the protruding parts projecting inward from the inner surfaces of the second and third guide plates 47 and 49, and at that time, the slider 19 is fixed to the erection unit 15. By fixing the slider 19 to the erection unit 15, further upward sliding of the slider 19 is blocked, and the payout of the first and second swivel chains 14a and 14b in one direction (forward in the front-rear direction) stops.

[0116] When the tapered portion of the slide stopper roller 88 of the set screw 85 abuts against the protruding portions on the inner surfaces of the second and third guide plates 47 and 49 and the feeding of the turning chains 14a and 14b stops, the downward turning in the vertical direction of the free ends 36 of the first and second window bodies 13a and 13b stops. The downward turning angles in the vertical direction of the first and second window bodies 13a and 13b are different depending on the fixed positions of the slider 19 in the guideline 18 using the set screw 85, and the opening areas when these window bodies 13a and 13b are opened are different.

[0117] After fixing the slider 19 to the connecting plate 52 with the set screw 85, to release the fixing of the slider 19, rotate the operating portion 86 of the set screw 85 in the clockwise direction (positive direction) to advance the screw portion 87 toward the connecting plate 52 (base plate 41). When the screw portion 87 is advanced, the tapered portion of the slide stopper roller 88 separates from the protruding portions on the inner surfaces of the second and third guide plates 47 and 49, the pressing of the inner surfaces of the second and third guide plates 47 and 49 by the tapered portion of the slide stopper roller 88 is released, the fixing of the slider 19 is released, and the slider 19 can slide in the vertical direction.

[0118] The window opening and closing system 11 can adjust the upward movement distance (slide distance) of the slider 19 from the lower end 60 of the guideline 18 by adjusting the installation position of the stopper 84 in the guideline 18, and can adjust the downward turning angle of the free ends 36 of the first and second window bodies 13a and 13b from the upper frame 23. Therefore, the opening area of the window bodies 13a and 13b at the time of opening can be adjusted by the stopper 84, and the air volume of the air flowing through these window bodies 13a and 13b can be adjusted.

[0119] The window opening / closing system 11 can open the window main bodies 13a and 13b by fixing the slider 19 at a predetermined position on the guideline 18 using the set screw 85 (fixing means), so that the free ends 36 of the window main bodies 13a and 13b can be pivoted downward from the upper frame 23 at an arbitrary angle. Therefore, the opening area of the window main bodies 13a and 13b during opening can be adjusted using the set screw 85, and the air volume of the air flowing through the window main bodies 13a and 13b can be adjusted.

Description of Signs

[0120] 10 Window opening / closing system 11 Window opening / closing system 12a First window frame 12b Second window frame 13a First window main body (first shoji) 13b Second window main body (second shoji) 14a First pivot chain 14b Second pivot chain 15 Erection unit 16a First drive unit 16b Second drive unit 17 Chain operating means 18 Guideline 19 Slider 20 Lock mechanism 21 Towing chain (towing member) 22a First rotation mechanism 22b Second rotation mechanism 23 Upper frame 24 Lower frame 25a First side frame 25b Second side frame 26 Upper frame plate 27 Upper contact plate 28 Lower frame plate 29 Lower contact plate 30 First side frame plate 31 First contact plate 32 Second side frame plate 33 Second contact plate 34 Window equipment 35 Rotating end part (rotating frame) 36 Free end part (swiveling frame) 37a First side part (first lateral frame) 37b Second side part (second lateral frame) 38 Shutter fitting 39 First mounting plate 40 Second mounting plate 41 Base plate 42 Cover plate 43 First chain housing space (first guide recess) 44 Second chain housing space (second guide recess) 45 Housing space 46 First guide plate 47 Second guide plate 48 First guide base plate 49 Third guide plate 50 Fourth guide plate 51 Second guide base plate 52 Connecting plate 53 First plate 54 Second plate 55 Third plate 56 Bearing plate 57a First housing space 57b Second housing space 58 Upper end 59 Middle part (moving space) 60 Lower end 61 Upper plate 62 Lower plate 63 One end part 64 First connecting part 65 Second connecting part 66 Screw hole (threaded hole) 67 Adjusting screw 68 Screw part 69 Engaging cam 70 Swiveling lever (swiveling handle) 72 Outer peripheral edge 73 Rotating base end part 74 Gripping part (handle) 75 Swivel arm 76 Engagement pin 77 Tip 78 Other end (free end) 79a First rod 79b Second rod 80 Sprocket 81a First roller 81b Second roller 82a First ring mounting drum 82b Second ring mounting drum 83a First torsion spring 83b Second torsion spring 84 Stopper 85 Set screw (fixing means) 86 Operating part 87 Threaded part 88 Slide stop roller

Claims

1. A window opening and closing system comprising: a window body rotatably installed on a window frame, with a free end pivoting in the vertical direction about a rotatable end; a pivoting chain connected to the free end of the window body to pivot the window body from a closed state to an open state and from the open state to the closed state; and a chain actuating means for feeding the pivoting chain in one direction to pivot the window body from the closed state to the open state and pulling the pivoting chain in the other direction to pivot the window body from the open state to the closed state, wherein the chain actuating means is formed by a guide line located below the window frame and extending in the vertical direction, a slider sliding in the vertical direction along the guide line, a traction member connected to the slider and moving up and down with the vertical sliding of the slider, and a rotation mechanism that rotates with the up and down movement of the traction member, winds up the pivoting chain, and feeds out the pivoting chain, the window frame is formed by an upper frame and a lower frame extending horizontally and spaced apart from each other in the vertical direction, and first and second side frames extending vertically and spaced apart from each other in the horizontal direction, the window opening and closing system includes an erection unit extending downward from one of the first side frame and the second side frame forming the window frame, the guide line is formed in the erection unit, and is located below the window frame and extends in the vertical direction, the window opening and closing system is characterized in that the slider is slid in the vertical direction on the guide line to operate the traction member in the vertical direction, and while rotating the rotation mechanism, the pivoting chain is fed out in one direction to pivot the window body from the closed state to the open state, or while rotating the rotation mechanism, the pivoting chain is pulled in the other direction to pivot the window body from the open state to the closed state.

2. The window opening and closing system according to claim 1, wherein the slider is slid upward in the vertical direction from the lower end of the guide line to operate the traction member upward in the vertical direction, and while rotating the rotation mechanism, the turning chain is fed out in one direction to turn the window body from the closed state to the open state; the slider is slid downward in the vertical direction from the upper end of the guide line to operate the traction member downward in the vertical direction, and while rotating the rotation mechanism, the turning chain is pulled in the other direction to turn the window body from the open state to the closed state.

3. The window body has a rotating end rotatably connected to the lower frame and airtightly adhering to the lower frame in the closed state, and a free end that rotates to an airtight closing position adhering to the upper frame in the closing operation and rotates to a lower open position in the vertical direction in the opening operation. When the turning chain turns the window body from the closed state to the open state at the start, it exerts a feeding force that promotes the rotation of the free end due to its linear motion. The window opening and closing system utilizes the feeding force of the turning chain to rotate while the free end of the window body rotates from the closed position to the open position at the start, and in the turning process except for the start, the free end of the window body automatically rotates downward in the vertical direction due to the self-weight of the window body. The window opening and closing system according to claim 1 or claim 2.

4. The traction member is a traction chain with one end connected to the slider and moving up and down as the slider slides in the vertical direction. The rotation mechanism includes a rod rotatably installed on the window frame and extending horizontally, a sprocket formed on one side of the rod with which the traction chain engages and rotates as the traction chain moves up and down, and a roller formed on the other side of the rod to which the turning chain is connected and that feeds out and winds up the turning chain as the sprocket rotates. The window opening and closing system according to any one of claims 1 to 3.

5. When the rotating mechanism is installed on the other side of the rod and is twisted in the winding direction or the direction opposite to the winding direction, it includes a torsion spring that generates torque in the opposite direction proportional to the twisted angle. When the rod rotates in the direction of feeding out the pivoting chain, the torsion spring is twisted in the winding direction or the direction opposite to the winding direction, and the torsion spring generates torque in the direction of pulling the pivoting chain. The window opening and closing system according to claim 4, wherein the winding of the pivoting chain around the roller is promoted by the torque of the torsion spring.

6. The installation unit is formed by a first guide plate and a second guide plate that extend in the vertical direction facing each other, and a base plate that is located between the first and second guide plates and extends in the vertical direction. A first chain accommodation space for accommodating the traction chain to move vertically is formed on the side of the first guide plate and extends in the vertical direction, and a second chain accommodation space for accommodating the traction chain to move vertically is formed on the side of the second guide plate and extends in the vertical direction. The window opening and closing system according to claim 4 or claim 5.

7. The chain operating means includes a locking mechanism that locks the slide of the slider while applying a tension force to the traction chain when the slider is slid downward in the vertical direction and the slider is located at the lower end of the guide line. The window opening and closing system according to any one of claims 4 to 6.

8. The lock mechanism includes an engagement cam formed at the lower end of the guideline, and a swing lever rotatably installed at the lower end of the slider and having an engagement pin at a rotary base end portion located at the lower end of the slider, the engagement pin moving along the outer peripheral edge of the engagement cam. After moving the slider to the lower end of the guideline, the window opening and closing system rotates the swing lever either forward or backward to move the engagement pin to a predetermined locking position along the outer peripheral edge of the engagement cam, thereby locking the slide of the slider with the traction chain under tension. With the slide of the slider locked, the window opening and closing system rotates the swing lever in the other of the forward or backward directions to move the engagement pin to a predetermined unlocking position along the outer peripheral edge of the engagement cam, thereby enabling the slider to slide in the guideline. The window opening and closing system according to claim 7.

9. The window opening and closing system includes a stopper removably installed at a predetermined location on the guideline to stop the vertical slide of the slider. By adjusting the installation position of the stopper on the guideline, the window opening and closing system can adjust the vertical slide distance of the slider from the lower end of the guideline, and can adjust the downward swing angle of the free end of the window body from the upper frame. The window opening and closing system according to any one of claims 1 to 8.

10. The window opening and closing system includes fixing means installed on the slider to fix the slider at a predetermined location on the guideline. During the process of vertically sliding the slider on the guideline, the window opening and closing system can use the fixing means to fix the slider at a predetermined location on the guideline, and can open the window body with the free end of the window body swung downward at an arbitrary angle from the upper frame. The window opening and closing system according to any one of claims 1 to 9.

Images