Window opening and closing system

Abstract

To provide a window opening / closing system that can smoothly rotate a window body to easily open or close the window body with less labor and time.SOLUTION: In a window opening / closing system 10, a slider 20 is slid upward along a vertical direction from a bottom edge of a guideline 19 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 wires in one direction, which, giving turning force to window bodies 13a and 13b with use of kick-out force of first and second kick-out springs at an initial stage of the movement, rotates window bodies 13a and 13b from a closed state to an open state. The slider 20 is slid downward along the vertical direction from a top edge of the guideline 19 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 wires 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 preferably used for a smoke exhaust window.

Background Art

[0002] A window opening and closing device is disclosed that includes a shoji (window body) assembled to be displaceable with respect 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 includes 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 rotating the winding handle many times, which is troublesome for the operator, and it takes time and effort to close the shoji in the open state. 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 taking time and effort, easily open the window body, and smoothly swing the window body from the open state to the closed state to 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, does not leave the window body in an incompletely closed state, and can surely close the window body in a complete state.

Means for Solving the Problems

[0006] The premise of the present invention for solving the above problems is a window body whose free end swings vertically around a rotation end rotatably installed on a window frame, and a wire connected to the free end of the window body to swing the window body from the closed state to the open state and A wire for swinging from the open state to the closed state, and a wire operating means for feeding out the wire in one direction to swing the window body from the closed state to the open state and pulling the wire in the other direction to swing the window body from the open state to the closed state.

[0007] The feature of the present invention under the above premise is that the kicking means for applying a turning force to the window body at the start of turning the window body from the closed state to the open state is installed on either the window frame or the window body. The wire operating means includes 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 rotation mechanism that rotates as the traction member moves up and down, winds up the wire, and pays out the wire. 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. The guideline is formed in the installation unit, 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 rotation mechanism while paying out the wire in one direction, and uses the kicking force of the kicking means at the start of operation to apply a turning force to the window body while turning the window body from the closed state to the open state, or slides the slider vertically on the guide line to operate the traction member vertically, rotates the rotation mechanism while pulling the wire in the other direction to turn 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 rotation mechanism while paying out the wire in one direction, and uses the kicking force of the kicking means at the start of operation to apply a turning force to the window body while turning the window body from the closed state to the open state. Then, it slides the slider vertically downward from the upper end of the guide line to operate the traction member vertically downward, rotates the rotation mechanism while pulling the wire in the other direction to turn the window body from the open state to the closed state.

[0009] As another example of the present invention, the kicking means is a kicking spring that applies a turning force to the window body at the start of the initial movement when the free end of the window body turns from the closed position to the open position. The window body is rotatably installed on the lower frame and has a rotating end that is airtightly in contact with the lower frame in the closed state, and a free end that turns to an airtight contact position with the upper frame in the closing operation and turns to an open position below in the vertical direction in the opening operation. It also has first and second side portions that are spaced apart horizontally and extend in the vertical direction. A pair of kicking springs are installed on the first and second side frames or the first and second side portions. The window opening and closing system is configured such that when the free end of the window body turns from the closed position to the open position at the start of the initial movement, a turning force is applied by the repulsive force of these kicking springs and the window body turns. During the turning process except for the start of the initial movement, the free end of the window body automatically turns downward in the vertical direction due to the weight of the window body. Before the free end of the window body turns to the closed position, the free end turns upward in the vertical direction against the repulsive force of these kicking springs.

[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 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 with a wire connected thereto, which pays out and winds up the wire 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 that generates torque in the opposite direction proportional to the twisted angle when twisted in the winding direction or the direction opposite to the winding direction. The window opening and closing system is configured such that when the rod rotates in the direction of paying out the wire, 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 wire, which promotes the winding of the wire around the roller.

[0012] As another example of the present invention, the erection unit is formed of 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 so as to be vertically movable 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 so as to be vertically movable 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 wire 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 of an engagement cam formed at the lower end of the guide line and a swing lever that is rotatably installed at the lower end of the slider and has an engagement pin at the rotary base end portion 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 rotates the swing lever in either the forward or reverse direction after moving the slider to the lower end of the guide line, 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 in a state where a tension force is applied to the traction chain. When the slide of the slider is locked, the swing lever is rotated in either the other forward or reverse direction, and the engagement pin is moved to a predetermined unlocking position along the outer peripheral edge of the engagement cam, thereby enabling the slide of the slider.

[0015] As another example of the present invention, the window opening and closing system includes a stopper that is detachably installed at a predetermined position of the guide line and stops 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 guide line by adjusting the installation position of the stopper on the guide line, and can adjust the downward swing angle of the free end of the window body from the upper frame.

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

Effect of the Invention

[0017] According to the window opening / closing system of the present invention, the slider is slid vertically on the guide line to operate the traction member vertically to rotate the rotation mechanism while feeding out the wire in one direction, and the kicking force of the kicking means is utilized at the start to apply a pivoting force to the window body while pivoting the window body from the closed state to the open state. Therefore, the window body can be pivoted 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 pivoted from the closed state to the open state to easily open the window body. The window opening / closing system slides the slider vertically on the guide line to operate the traction member vertically to rotate the rotation mechanism while pulling the wire in the other direction to pivot the window body from the open state to the closed state. Therefore, the window body can be pivoted 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 pivoted from the open state to the closed state to easily close the window body. The window opening / closing system applies a pivoting force to the window body by utilizing the kicking force of the kicking means at the start. Therefore, when the slider is slid vertically, the window body can be surely pivoted by the kicking force of the kicking means, and the window body can be surely opened. When closing the opened window body, the window opening / closing system does not need to rotate the winding handle many times as in the prior art, and only needs to slide the slider vertically, and the window body in the open state can be closed in a short time by a simple sliding operation.

[0018] The window opening and closing system slides the slider upward in the vertical direction from the lower end of the guideline to operate the traction member upward in the vertical direction, feeds out the wire in one direction while rotating the rotation mechanism, and uses the kicking force of the kicking means at the start to apply a turning force to the window body while turning the window body from the closed state to the open state. Then, it slides 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 pulls the wire in the other direction while rotating the rotation mechanism to turn the window body from the open state to the closed state. With this system, the window body can be turned from the closed state to the open state only by sliding the slider upward in the vertical direction, without requiring much effort and time. It can smoothly turn the window body from the closed state to the open state, making it easy to open the window body. Also, the window body can be turned from the open state to the closed state only by sliding the slider downward in the vertical direction, without requiring much effort and time. It can smoothly turn the window body from the open state to the closed state, making it easy to 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. Just sliding the slider downward in the vertical direction is sufficient, and the window body in the open state can be closed in a short time with a simple sliding operation.

[0019] The kicking spring applies a turning force to the window body at the initial movement when the kicking means turns the free end of the window body from the closed position to the open position. The window frame is formed by an upper frame, a lower frame, and first and second side frames, and the window body has a rotating end rotatably installed on the lower frame, a free end that turns to the open position downward in the vertical direction, and first and second side portions. A pair of kicking springs are installed on the first and second side frames of the window frame or the first and second side portions of the window body. At the initial movement when the free end of the window body turns from the closed position to the open position, a turning force is applied by the repulsive force of these kicking springs and the window body turns. During the turning process except for the initial movement, the free end of the window body automatically turns downward in the vertical direction due to the weight of the window body. Before the free end of the window body turns to the closed position, the free end turns upward in the vertical direction against the repulsive force of these kicking springs. The window opening and closing system turns while utilizing the repulsive force of these kicking springs at the initial movement when the free end of the window body turns from the closed position to the open position, and during the turning process except for the initial movement, the free end of the window body automatically turns downward in the vertical direction due to the weight of the window body. Therefore, by utilizing the repulsive force of the kicking springs and the weight of the window body, when the slider is slid upward in the vertical direction, the window body can be surely turned, and the window body can be smoothly turned from the closed state to the open state without taking time and effort by the upward sliding operation of the slider in the vertical direction, and the window body can be easily opened. In the window opening and closing system, during the turning process except for the initial movement, the free end of the window body automatically turns downward in the vertical direction due to the weight of the window body, so that in an emergency, the window body can be opened at once without the need for the sliding operation of the slider. In the window opening and closing system, before the free end of the window body turns to the closed position, the free end turns upward in the vertical direction against the repulsive force of these kicking springs, so that when the window body is opened again, the repulsive force of these kicking springs can be utilized again at the initial movement to smoothly open the window body.

[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 composed of a rod rotatably installed on the window frame, a sprocket that rotates as the traction chain moves up and down, and a roller that pays out and winds up the wire as the sprocket rotates. The window opening and closing system slides the slider upward in the vertical direction from the lower end of the guide line to operate the traction chain upward in the vertical direction. By operating the traction chain upward in the vertical direction, the sprocket is rotated to pay out the wire from the roller, and the window body is pivoted from the closed state to the open state. Therefore, the window body can be pivoted from the closed state to the open state only by sliding the slider upward in the vertical direction, without requiring labor and time, and the window body can be smoothly pivoted from the closed state to the open state to easily open the window body. The window opening and closing system slides the slider downward in the vertical direction from the upper end of the guide line to operate the traction chain downward in the vertical direction. By operating the traction chain downward in the vertical direction, the sprocket is rotated to wind up the wire onto the roller, and the window body is pivoted from the open state to the closed state. Therefore, the window body can be pivoted from the open state to the closed state only by sliding the slider downward in the vertical direction, without requiring labor and time, and the window body can be smoothly pivoted 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 wire, 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 (winding) the wire. The torque of the torsion spring promotes the winding of the wire around the roller. When closing the window body in the open state, although force is required to slide the slider downward in the vertical direction due to the weight of the window body, since the torque of the torsion spring promotes the winding of the wire around the roller, by using the torsion spring, the slider can be slid downward in the vertical direction without requiring a large force, and the window body can be smoothly pivoted 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 a 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, and the window body can be smoothly pivoted from the closed state to the open state to easily open the window body, and at the same time, the window body can be smoothly pivoted from the open state to the closed state to easily close the window body.

[0023] The erection unit is formed by a first guide plate and a second guide plate extending vertically and facing each other, and a base plate extending vertically and located between the first and second guide plates. 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 vertically, 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 vertically. The window opening and closing system is The traction chain is vertically movably accommodated in the first and second chain accommodation spaces, so that the slider is slid vertically (upward in the vertical direction from the lower end of the guide line of the slider) on the guide line to operate the traction chain vertically in the first and second chain accommodation spaces. By the operation of the traction chain, the sprocket is rotated to pay out the wire from the roller, and the window body is pivoted from the closed state to the open state. Therefore, the window body can be pivoted from the closed state to the open state only by sliding the slider vertically (upward in the vertical direction), without taking time and effort, and the window body can be smoothly pivoted from the closed state to the open state to easily open the window body. The window opening and closing system slides the slider vertically (downward in the vertical direction from the upper end of the guide line of the slider) on the guide line to operate the traction chain vertically in the first and second chain accommodation spaces. By the operation of the traction chain, the sprocket is rotated to wind up the wire on the roller, and the window body is pivoted from the open state to the closed state. Therefore, the window body can be pivoted from the open state to the closed state only by sliding the slider vertically (downward in the vertical direction), without taking time and effort, and the window body can be smoothly pivoted from the open state to the closed state to easily close the window body.

[0024] The window opening and closing system including a locking mechanism that locks the sliding 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 can clearly confirm the closed position of the window body by locking the sliding (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 sliding of the slider in a state where a tension force is applied to the traction chain, the traction 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.

[0025] The window opening and closing system is formed by an engagement cam formed at the lower end of the guide line and a swing lever rotatably installed at the lower end of the slider, having an engagement pin at the rotary base end located at the lower end of the slider and the engagement pin moving along the outer peripheral edge of the engagement cam. After moving the slider to the lower end of the guide line, the swing lever is rotated in either the forward or reverse direction, and the engagement pin is moved to a predetermined locking position along the outer peripheral edge of the engagement cam, thereby locking the slide of the slider with the tension chain applied with tension. When the swing lever is rotated in either the other forward or reverse direction with the slide of the slider locked, and the engagement pin is moved to a predetermined unlocking position along the outer peripheral edge of the engagement cam, the slide of the slider becomes possible. By rotating the swing lever in either the forward or reverse direction at the lower end of the guide line, moving the engagement pin to a predetermined locking position along the outer peripheral edge of the engagement cam, and locking the slide (vertical movement) of the slider while applying tension to the tension chain, the closing position of the window body can be clearly confirmed by moving the engagement pin to the locking position, 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 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 swing lever in either the other forward or reverse direction with the slide of the slider locked and moving the engagement pin to a predetermined unlocking position along the outer peripheral edge of the engagement 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 that is detachably installed at a predetermined position on a guide line and stops 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 upper frame of the rotating end of the window body can be adjusted. Since the downward turning angle of the upper frame of the rotating end of the window body can be adjusted by adjusting the installation position of the stopper on the guide line, the opening area of the window body when opened 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 when opened 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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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 and closing system 10 shown as an example, the details of the window opening and closing system according to the present invention will be described as follows. Note that FIG. 2 is a top view of the window opening and 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 three or more window frames or window bodies.

[0030] The window opening / closing system 10 (smoke exhaust operator) is normally used for air replacement (room 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 kicking spring 14a and a second kicking spring 14b, a first wire 15a for rotating the first window body 13a and a second wire 15b for rotating the second window body 13b, an erection unit 16 (chain box), a first drive unit 17a and a second drive unit 17b, and a chain operating means 18 for operating (extending or winding) these wires 15a, 15b.

[0031] The chain operating means 18 is formed by a guideline 19 (slide line), a slider 20, a locking mechanism 21, a traction chain 22 (traction member), a first rotation mechanism 23a, and a second rotation mechanism 23b. The guideline 19, the slider 20, the locking mechanism 21, and the traction chain 22 are installed in the erection unit 16. The first rotation mechanism 23a is installed in the first drive unit 17a (see FIG. 2), and the second rotation mechanism 23b is installed in the second drive unit 17b (see FIG. 2).

[0032] The first window frame 12a and the second window frame 12b are installed at a high place (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 24 installed near the ceiling and extending straight in the horizontal direction, a lower frame 25 installed below the upper frame 24 and extending straight in the horizontal direction, and a first side frame 26a and a second side frame 26b extending straight in the vertical direction.

[0033] In these window frames 12a and 12b, the upper frame 24 and the lower frame 25 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 26a and the second side frame 26b 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 24 and 25 and the first and second side frames 26a and 26b 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 24 and 25 and the first and second side frames 26a and 26b are formed in a substantially angled shape (L-shaped). The upper frame 24 has an upper frame plate 27 that is located directly above the free end 37 of the window bodies 13a and 13b and extends in the horizontal direction, and an upper contact plate 28 that extends in the horizontal direction orthogonally to the upper frame plate 27 and with which the rear surface of the free end 37 of the window bodies 13a and 13b is airtightly in contact. The lower frame 25 has a lower frame plate 29 that is located directly below the rotating end 36 of the window bodies 13a and 13b and extends in the horizontal direction, and a lower contact plate 30 that extends in the horizontal direction orthogonally to the lower frame plate 29 and with which the rear surface of the rotating end 36 of the window bodies 13a and 13b is airtightly in contact.

[0035] The first side frame 26a has a first side frame plate 31 that is located laterally of the first side portion 38a of the window bodies 13a and 13b and extends in the vertical direction, and a first contact plate 32 that extends in the vertical direction orthogonally to the first side frame plate 31 and with which the rear surface of the first side portion 38a of the window bodies 13a and 13b is airtightly in contact. The second side frame 26b has a second side frame plate 33 that is located laterally of the second side portion 38b of the window bodies 13a and 13b and extends in the vertical direction, and a second contact plate 34 that extends in the vertical direction orthogonally to the second side frame plate 33 and with which the rear surface of the second side portion 38b of the window bodies 13a and 13b is airtightly in contact.

[0036] The first and second window frames 12a and 12b are made of resin sashes, aluminum sashes, or aluminum-resin composite sashes, and those window frames 12a and 12b are connected to the wall by existing connecting means, and those window frames 12a and 12b are connected to each other. Immediately below the first and second window frames 12a and 12b (the first and second window bodies 13a and 13b), there is provided an openable window facility 35 in which glass (glass shoji) is fitted into the window frame. The window frames 12a and 12b and the window facility 35 are connected by existing connecting means. Incidentally, there may be a wall provided 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 those of the same shape and size, which are rectangular and long in the horizontal direction, are 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 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] Those window bodies 13a and 13b have a rotating end portion 36 (rotating frame) that is rotatably connected (installed) to the lower frame 25 of the window frame 12a and 12b and extends straight in the horizontal direction, a free end portion 37 (swinging frame) that extends straight in the horizontal direction while being spaced apart and opposed upward from the rotating end portion 36, and a first side portion 38a (first side frame 38a) and a second side portion 38b (second side frame 38b) that are spaced apart and opposed in the horizontal direction and extend straight in the vertical direction. At the horizontal center of those free end portions 37, a shoji fitting 39 is installed and fixed.

[0039] The rotating end portion 36 is airtightly in close contact with the lower contact plate 30 of the lower frame 25 in the closed state (closed position) of the window bodies 13a and 13b, and the first and second side portions 38a and 38b are airtightly in close contact with the first and second contact plates 32 and 34 of the first and second side frames 26a and 26b in the closed state of the window bodies 13a and 13b. The free end portion 37 pivots to a closed position where it is airtightly in close contact with the upper contact plate 28 of the upper frame 24 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 and 13b (inside the rotating end portion 36, the free end portion 37, and the first and second side portions 38a and 38b). The rotating end portion 36, the free end portion 37, and the first and second side portions 38a and 38b are made of a resin sash, an aluminum sash, or an aluminum-resin composite sash.

[0040] The first kick-out spring 14a (kick-out means) is installed on the first side portion 38a of the window bodies 13a and 13b and extends in the vertical direction. The second kick-out spring 14b (kick-out means) is installed on the second side portion 38b of the window bodies 13a and 13b and extends in the vertical direction. The upper ends 40 of these kick-out springs 14a and 14b are connected to the upper ends of the first and second side portions 38a and 38b by predetermined connecting means. These kick-out springs 14a and 14b are inclined downward in a rearward slope in the front-rear direction so as to gradually separate from the first and second side portions 38a and 38b from the upper ends 40 toward the lower ends 41. Incidentally, the lower ends 41 of these kick-out springs 14a and 14b may be connected to the lower ends of the first and second side portions 38a and 38b by predetermined connecting means. In this case, these kick-out springs 14a and 14b are inclined upward in a rearward slope in the front-rear direction so as to gradually separate from the first and second side portions 38a and 38b from the lower ends 41 toward the upper ends 40.

[0041] In the closed state of the window bodies 13a and 13b, the ejection springs 14a and 14b are in close contact with the first and second contact plates 32 and 34 of the first and second side frames 26a and 26b, so that the repulsive force of the ejection springs 14a and 14b acts on the first and second contact plates 32 and 34. These ejection springs 14a and 14b apply a turning force to the free end 37 of the window bodies 13a and 13b at the initial stage when the free end 37 of the window bodies 13a and 13b turns from the closed position to the open position by the repulsive force thereof.

[0042] The first ejection spring 14a (ejection means) may be installed on the first contact plate 32 of the first side frame 26a of the first and second window frames 12a and 12b and extend in the vertical direction, and the second ejection spring 14b (ejection means) may be installed on the second contact plate 34 of the second side frame 26b of the first and second window frames 12a and 12b and extend in the vertical direction. In this case, the upper end portions 40 of these ejection springs 14a and 14b are connected to the upper end portions of the first and second contact plates 32 and 34 by predetermined connecting means, and these ejection springs are inclined downward in the front-rear direction so as to gradually separate from the first and second contact plates 32 and 34 of the first and second side frames 26a and 26b as they go from the upper end portion 40 to the lower end portion 41. Or, the lower end portions 41 of these ejection springs 14a and 14b are connected to the lower end portions of the first and second contact plates 32 and 34 by predetermined connecting means, and these ejection springs are inclined upward in the front-rear direction so as to gradually separate from the first and second contact plates 32 and 34 of the first and second side frames 26a and 26b as they go from the lower end portion 41 to the upper end portion 40.

[0043] In the closed state of the window bodies 13a and 13b, the ejection springs 14a and 14b are in close contact with the first and second side portions 38a and 38b of the window bodies 13a and 13b, so that the repulsive force of the ejection springs 14a and 14b acts on the first and second side portions 38a and 38b. Similar to the case where the ejection springs 14a and 14b are installed on the first and second side portions 38a and 38b, the repulsive force of these ejection springs (ejection means) applies a turning force to the free end 37 at the initial stage of turning of the free end 37 of the window bodies 13a and 13b.

[0044] The first and second wires 15a and 15b are made of stainless steel wire, zinc-plated steel wire, copper wire, brass wire, pure silver wire, etc. The tip of the first wire 15a is connected to the shoji fitting 39 at the free end 37 of the first window body 13a, and the tip of the second wire 15b is connected to the shoji fitting 39 at the free end 37 of the second window body 13b. These wires 15a and 15b rotate the first and second window bodies 13a and 13b from the closed state to the open state and also rotate these window bodies 13a and 13b from the open state to the closed state.

[0045] In the window opening / closing system 10, when the first and second wires 15a and 15b are fed out in one direction (forward in the front-rear direction), the free ends 37 of the first and second window bodies 13a and 13b that are airtightly adhered to the upper frame 24 rotate downward in the vertical direction about the rotation end 36, and these window bodies 13a and 13b rotate from the closed state (closed position) to the open state (fully open position) (see FIG. 13). The downward rotation angles in the vertical direction of these window bodies 13a and 13b differ depending on the feeding dimensions of the first and second wires 15a and 15b, and the opening area when the window bodies 13a and 13b are opened can be adjusted by adjusting the feeding dimensions of these wires 15a and 15b. In the window opening / closing system 10, when the first and second wires 15a and 15b are drawn in the other direction (rearward in the front-rear direction), the free ends 37 of the first and second window bodies 13a and 13b that have rotated downward in the vertical direction rotate upward in the vertical direction about the rotation end 36, and these window bodies 13a and 13b rotate from the open state (fully open position) to the closed state (closed position) (see FIG. 11).

[0046] FIG. 4 is a side view of the erection unit 16 shown as an example, and FIG. 5 is a partially enlarged top view of the erection unit 16. FIG. 6 is a partially enlarged perspective view of the erection unit 16, and FIG. 7 is a partially enlarged view of the erection unit 16 showing an example of the lock mechanism 21. FIG. 8 is a partially enlarged view of the erection unit 16 following FIG. 7, and FIG. 9 is a partially enlarged top view of the drive units 17a and 17b showing an example of the rotation mechanisms 23a and 23b. FIG. 10 is a partially enlarged top view of the drive units 17a and 17b following FIG. 9. In FIG. 4, the cover plate 45 of the erection unit 16 is shown broken. In FIG. 6, the illustration of the engagement cam 72 is omitted. In FIGS. 9 and 10, the illustration of the window bodies 13a and 13b is omitted.

[0047] The erection unit 16 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 26b of the first window frame 12a. Incidentally, the erection unit 16 may extend straight downward from the first side frame 26a of the first window frame 12a, the erection unit 16 may extend straight downward from the first side frame 26a of the second window frame 12b, or the erection unit 17 may extend straight downward from the second side frame 26b of the second window frame 12b.

[0048] The erection unit 16 is formed by first and second erection plates 42 and 43 of the same shape and size that face each other in the front-rear direction and extend in the vertical direction, a base plate 44 and a cover plate 45 that are located between the first and second erection plates 42 and 43 and extend in the vertical direction orthogonally to those erection plates 42 and 43, a first chain accommodation space 46 (first guide recess) that is located on the side of the first erection plate 42 and extends in the vertical direction parallel to the first erection plate 42, and a second chain accommodation space 47 (second guide recess) that is located on the side of the second erection plate 43 and extends in the vertical direction parallel to the second erection plate 43.

[0049] In the erection unit 16, the first and second erection plates 42, 43 and the base plate 44 are integrally formed, and their cross-sectional shape is formed into a U shape. In the erection unit 16, an accommodation space 48 that is long in the vertical direction and surrounded by these plates 42 to 44 is defined. In the erection unit 16, a cover plate 45 is detachably installed on the first and second erection plates 42, 43 that extend upward from the upper end 61 of the guide line 19, and covers the accommodation space 48 of the erection unit 16. The erection unit 16 is connected and fixed to the second side frame 26a of the first window frame 12a and the window frame of the window equipment 35 by a predetermined connecting means (bracket, bolt and nut, rivet, welding, etc.) for the first erection plate 42.

[0050] The first chain accommodation space 46 (first guide recess) is formed by a first guide plate 49 that extends in the vertical direction adjacent to the first erection plate 42, a second guide plate 50 that extends in the vertical direction and is spaced apart from the first guide plate 49 toward the side of the second erection plate 43, and a first guide base plate 51 that is located between the first and second guide plates 49, 50 and extends in the vertical direction. The first and second guide plates 49, 50 are formed in an angle shape (L shape). The first and second guide plates 49, 50 and the first guide base plate 51 are accommodated in the accommodation space 48 of the erection unit 16, and the first guide base plate 51 is connected and fixed to the base plate 44 of the erection unit 16 by a predetermined connecting means (bolt and nut, rivet, welding, etc.). A traction chain 22 is accommodated in the first chain accommodation space 46 so as to be vertically movable (slidable).

[0051] The second chain accommodation space 47 (second guide recess) is formed by a third guide plate 52 that extends in the vertical direction adjacent to the second erection plate 43, a fourth guide plate 53 that extends in the vertical direction and is spaced apart from the third guide plate 52 toward the side of the first erection plate 42, and a second guide base plate 54 that is located between the third and fourth guide plates 52, 53 and extends in the vertical direction.

[0052] The third and fourth guide plates 52, 53 are formed in an angle shape (L shape). The third and fourth guide plates 52, 53 and the second guide base plate 54 are accommodated in the accommodation space 48 of the erection unit 16, and the second guide base plate 54 is connected and fixed to the base plate 44 of the erection unit 16 by a predetermined connecting means (bolts and nuts, rivets, welding, etc.). In the second chain accommodation space 47, the towing chain 22 is accommodated so as to be vertically movable (slidable). The second guide plate 50 in the first chain accommodation space 46 and the fourth guide plate 53 in the second chain accommodation space 47 are connected by a connecting plate 55, and the first chain accommodation space 46 and the second chain accommodation space 47 are integrally connected.

[0053] The first and second drive units 17a, 17b are made of a metal such as aluminum, stainless steel, or other alloys, and are arranged on the upper frames 24 of the horizontally arranged (adjacent) window frames 12a, 12b and extend straight in the horizontal direction. These drive units 17a, 17b are formed by a first plate 56 and a third plate 58 that extend in the horizontal direction facing each other in the front-rear direction, a second plate 57 that is located between the first and third plates 56, 58 and extends in the horizontal direction orthogonal to these plates 56, 58, and bearing plates 59 that are located on the sides and in the middle of the drive units 17a, 17b.

[0054] In the first and second drive units 17a, 17b, the first to third plates 56 to 58 are integrally formed, and their cross-sectional shape is formed in a U shape. In these drive units 17a, 17b, first and second accommodation spaces 60a, 60b that are long in the horizontal direction and surrounded by the first to third plates 56 to 58 are defined. In the first and second drive units 17a, 17b, the first plate 56 is connected and fixed to the upper frame 24 of the window frames 12a, 12b by a predetermined connecting means (brackets, bolts and nuts, rivets, welding, etc.).

[0055] Guide line 19 is formed on the erection unit 15, is located below the window bodies 13a, 13b (the first and second window frames 12a, 12b), and extends downward from the second side frame 26b that forms the first window frame 12a. Note that the guide line 19 may extend downward from the second side frame 26b of the second window frame 12b, or may extend downward from the first side frame 26a of the first window frame 12a or the second window frame 12b. The guide line 19 can arbitrarily adjust (change) the vertical length dimension, and can be set to a height at which it is easy to move the slider 20 up and down (a height at which it is easy to move the slider 20 up and down with little force). The guide line 19 has an upper end 61 (the lower end of the cover plate 45) located on the side of the window bodies 13a, 13b, a lower end 63 located on the ground side, and an intermediate portion 62 (a moving space) extending in the vertical direction between the upper end 61 and the lower end 63.

[0056] The slider 20 is made of a metal such as aluminum, stainless steel, or other alloys, and is formed from an upper plate 64 formed in a substantially plate shape that is long in the vertical direction and a lower plate 65 formed in a substantially plate shape that is long in the vertical direction and located below the upper plate 64. The slider 20 is disposed in the intermediate portion 62 (the moving space) of the guide line 19, and by sliding in the vertical direction in the first chain accommodation space 46 (the first guide recess), the intermediate portion 62 (the vertical central area of the erection unit 16) slides upward in the vertical direction from the lower end 63 to the upper end 61 of the guide line 19, and the intermediate portion 62 (the vertical central area of the erection unit 16) slides downward in the vertical direction from the upper end 61 to the lower end 63 of the guide line 19.

[0057] One end 66 of the towing chain 22 is connected to the upper end portion of the upper plate 64. A first connecting portion 67 extending in the front-rear direction perpendicular to the plate 64 is integrally formed at the lower end of the upper plate 64. A second connecting portion 68 extending in the front-rear direction perpendicular to the plate 65 and facing the first connecting portion 67 is integrally formed at the upper end of the lower plate 65. Thread holes 69 (threading holes) for screwing the threaded portion of an adjustment screw described later are formed in the first and second connecting portions 67, 68.

[0058] An adjusting screw 70 for adjusting the vertical separation dimension between the upper plate 64 and the lower plate 65 is installed at the first connecting portion 67 of the upper plate 64 and the second connecting portion 68 of the lower plate 65. The screw portion 71 of the adjusting screw 70 is screwed into the screw holes 69 (threaded holes) of the first and second connecting portions 67 and 68. A nut is screwed onto the screw portion 71 of the adjusting screw 70.

[0059] For example, by rotating the adjusting screw 70 in the clockwise direction (positive direction), the first connecting portion 67 and the second connecting portion 68 gradually approach each other, and the vertical separation dimension between the upper plate 64 and the lower plate 65 can be shortened. By rotating the adjusting screw 70 in the counterclockwise direction (reverse direction), the first connecting portion 67 and the second connecting portion 68 gradually separate from each other, and the vertical separation dimension between the upper plate 64 and the lower plate 65 can be lengthened.

[0060] Although not shown, a sliding piece (not shown) may be fixed to the lower surface of the slider 20. In this case, the sliding piece is slidably inserted (engaged) into the first chain accommodating space 46 (first guide recess) of the erection unit 16, and the slider 20 is disposed in the intermediate portion 62 (moving space) of the guide line 19. As the sliding piece slides in the first chain accommodating space 46 in the vertical direction, the slider 20 slides upward in the vertical direction in the intermediate portion 62 (the vertical central area of the erection unit 16) from the lower end 63 to the upper end 61 of the guide line 19, and the slider 20 slides downward in the vertical direction in the intermediate portion 62 from the upper end 61 to the lower end 63 of the guide line 17.

[0061] A guide rail (guide groove) is formed in the first guide plate 49 and the fourth guide plate 53 that extend to the middle portion 62 (the vertical center area of the erection unit 16) of the guideline 19. One side edge portion of the slider 20 may be slidably engaged with the guide rail (guide groove) formed in the first guide plate 49, and the other side edge portion of the slider 20 may be slidably engaged with the guide rail (guide groove) formed in the fourth guide plate 53. By slidably engaging one side edge portion and the other side edge portion of the slider 20 with the guide rail (guideline 19), the slider 20 slides upward in the vertical direction through the middle portion 62 from the lower end 63 to the upper end 61 of the guide rail, and the slider 20 slides downward in the vertical direction through the middle portion 62 from the upper end 61 to the lower end 63 of the guide rail.

[0062] The locking mechanism 21 locks the sliding (vertical movement) of the slider 20 in a state where a predetermined tension is applied to the towing chain 22 when the slider 20 is slid downward in the vertical direction and the slider 20 is positioned at the lower end 63 of the guideline 19. The locking mechanism 21 is formed of an engagement cam 72 (flat cam) and a swing lever 73 (swing handle) made of a metal such as aluminum, stainless steel, or other alloys.

[0063] The engagement cam 72 is disposed at the lower end 63 of the guideline 19 of the erection unit 16 and is connected (fixed) to the lower end 63 of the guideline 19 (the lower ends of the first and second erection plates 42, 43 and the base plate 44 of the erection unit 16) by a predetermined connecting means (such as bolts, rivets, welding). The engagement cam 72 has an outer peripheral edge 75 that slopes downward in the vertical direction. Incidentally, the outer peripheral edge 75 may draw an arc downward in the vertical direction.

[0064] The swivel lever 73 is installed at the lower end of the lower plate 65 of the slider 20 and is formed by a rotary base end portion 76 and a gripping portion 77 (handle). The rotary base end portion 76 is rotatably attached to the lower end of the lower plate 65. The swivel lever 73 rotates (swivels) the gripping portion 77 in the swivel direction (front - rear direction) (clockwise or counter - clockwise direction) of the window body 13a about the rotary base end portion 76. On the side of the rotary base end portion 76 of the gripping portion 77 (handle), a swivel arm 78 extending laterally (outward) from its side edge is integrally formed (connected). The swivel arm 78 is formed with an engagement pin 79 that protrudes toward the base plate 44 of the erection unit 16. The engagement pin 79 is detachably engaged with the engagement cam 72.

[0065] When the swivel arm 78 rotates the gripping portion 77 (swivel lever 73) in the counter - clockwise direction, the tip 80 of the swivel arm 78 abuts against the inner surface of the second erection plate 43 of the erection unit 16, and further rotation of the gripping portion 77 in the counter - clockwise direction stops. By adjusting the lateral (outward) extension dimension of the swivel arm 78, the swivel range of the gripping portion 77 (swivel lever 73) in the counter - clockwise direction can be adjusted. By adjusting the swivel range of the gripping portion 77 in the counter - clockwise direction, unnecessary rotation of the swivel arm 78 in the counter - clockwise direction can be prevented, and the operability of the slider 20 by the swivel lever 73 can be improved.

[0066] The engagement pin 79 rotates (swivels) in the swivel direction (front - rear direction) (clockwise or counter - clockwise direction) of the window body 13a together with the swivel arm 78 as the gripping portion 77 (swivel lever 73) rotates. In the swivel lever 73, the engagement pin 79 slidably moves along the outer peripheral edge 75 of the engagement cam 72. With the gripping portion 77 (handle) being pressed downward in the vertical direction while applying a swivel force to the gripping portion 77 (handle), the engagement pin 79 slides (climbs over) along the outer peripheral edge 75 of the engagement cam 72 in one direction and can slide (climb over) along the outer peripheral edge 75 of the engagement cam 72 in the other direction. The engagement pin 79 engages with the engagement cam 72 in a state where it has moved (climbed over) along the outer peripheral edge 75 of the engagement cam 72 in one direction.

[0067] In the window opening / closing system 10, the position of the engagement pin 79 with respect to the outer peripheral edge 74 of the engagement cam 72 is adjusted so that the engagement pin 79 can slide (override) the outer peripheral edge 75 in one direction or the other. By rotating the adjustment screw 70 of the slider 20 in the counterclockwise direction (reverse direction) to increase the vertical separation dimension between the upper plate 64 and the lower plate 65, while weakening the tension acting on the traction chain 22, the engagement pin 79 of the swivel lever 73 can be made to easily slide (override) the outer peripheral edge 75 of the engagement cam 72 in one direction or the other. By rotating the adjustment screw 70 of the slider 20 in the clockwise direction (forward direction) to shorten the vertical separation dimension between the upper plate 64 and the lower plate 65, the tension acting on the traction chain 22 can be increased, but force is required when the engagement pin 79 of the swivel lever 73 slides (overrides) the outer peripheral edge 75 of the engagement cam 72 in one direction or the other. By adjusting the length of the vertical separation dimension between the upper plate 64 and the lower plate 65, the tension acting on the traction chain 22 can be increased or decreased, so that the degree of adhesion of the free end 37 to the contact plate 28 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.

[0068] In the window opening / closing system 10, by using the adjustment screw 70 to adjust the vertical separation dimension between the upper plate 64 and the lower plate 65, when locking the slide (vertical movement) of the slider 20, an optimal tension can be applied to the traction chain 22, and the engagement pin 79 of the swivel lever 73 can be made to slide (override) the outer peripheral edge 75 of the engagement cam 72 in one direction or the other with an appropriate force.

[0069] The traction chain 22 (traction member) is made of a metal such as steel, stainless steel, or titanium. One end 66 thereof is connected to the upper end of the upper plate 64 of the slider 20 and is accommodated in the first chain accommodation space 46 (first guide recess) and the second chain accommodation space 47 (second guide recess) and extends in the vertical direction. The traction chain 22 moves up and down in the first chain accommodation space 46 and the second chain accommodation space 47 as the slider 20 slides (moves up and down) in the vertical direction. Incidentally, the other end 81 (free end) of the traction chain 22 is located in the second chain accommodation space 47 (second guide recess) and hangs downward from a sprocket 83 described later.

[0070] When the slider 20 slides upward in the vertical direction from the lower end 63 to the upper end 61 of the guide line 19 in the middle part 62 (the vertical center area of the erection unit 16), the one end 66 thereof moves upward in the vertical direction in conjunction therewith, and the entire traction chain 22 operates in the vertical direction. When the slider 20 slides downward in the vertical direction from the upper end 61 to the lower end 63 of the guide line 19 in the middle part 62, the one end 66 thereof moves downward in the vertical direction in conjunction therewith, and the entire traction chain 22 operates in the vertical direction.

[0071] The first and second rotation mechanisms 23a and 23b are interlocked with the vertical movement of the traction chain 22 caused by the vertical sliding of the slider 20, feed out the first and second wires 15a and 15b in one direction (forward in the front-rear direction), and take in (wind up) those wires 15a and 15b in the other direction (rearward in the front-rear direction). The first rotation mechanism 23a is formed by the first rod 82a, the sprocket 83, the first roller 84a, the first ring attachment drum 85a, and the first torsion spring 86a. The first rod 82a, the sprocket 83, the first roller 84a, the first ring attachment drum 85a, and the first torsion spring 86a are installed (accommodated) in the first accommodation space 60a of the first drive unit 17a.

[0072] The second rotation mechanism 23b is formed by a second rod 82b, a second roller 84b, a second ring mounting drum 85b, and a second torsion spring 86b. The second rod 82b, the second roller 84b, the second ring mounting drum 85b, and the second torsion spring 86b are installed (accommodated) in the second accommodation space 60b of the second drive unit 17b.

[0073] The first and second rods 82a and 82b are made of a metal such as aluminum, stainless steel, or other alloys, or a synthetic resin, and are formed in a cylindrical shape. The first and second rods 82a and 82b are rotatably accommodated (rotatably installed in the window frames 12a and 12b) in the first and second accommodation spaces 60a and 60b of the first and second drive units 17a and 17b and extend horizontally.

[0074] One end portion and the middle portion of the first rod 82a are rotatably supported by the bearing plate 59 of the first drive unit 17a. One end portion and the middle portion of the second rod 82b are rotatably supported by the bearing plate 59 of the second drive unit 17b. The first and second rods 82a and 82b are connected and integrated at their other ends. Therefore, when one of the first and second rods 82a and 82b 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).

[0075] The sprocket 83 is made of a metal such as carbon steel, rolled steel, stainless steel, or sintered alloy, or a synthetic resin, and is attached to the other end of the first rod 82a. The traction chain 22 is engaged with the teeth of the sprocket 83. The sprocket 83 rotates in the clockwise direction (positive direction) or the counterclockwise direction (negative direction) as the traction chain 22 moves up and down, and transmits a rotational force to the first and second rods 82a and 82b.

[0076] The sprocket 83 is adjustable in terms of the dimension of its outer diameter. Under the condition that the peripheral speed of the sprocket 83 (the speed of the slider 20) is the same, by increasing the outer diameter of the sprocket 83, the ratio of the diameter of the sprocket 83 to the diameters of the first and second rods 82a, 82b becomes larger, and the force (the force for pushing 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 revolutions of the first and second rods 82a, 82b required to change the window bodies 13a, 13b from the open state to the closed state remains unchanged, the vertical movement dimension of the slider 20 becomes longer by the amount by which the outer diameter dimension of the sprocket 83 is increased. Conversely, by decreasing the outer diameter of the sprocket 83, the ratio of the diameter of the sprocket 83 to the diameters of the first and second rods 82a, 82b becomes smaller, and the force (the force for pushing the slider downward) required to pivot the window bodies 13a, 13b upward in the vertical direction from the open state to the closed state becomes larger. On the contrary, the vertical movement dimension of the slider 20 becomes shorter.

[0077] By increasing the outer diameter of the sprocket 83, the window opening and closing system 10 increases the vertical movement dimension of the slider 20 between the closed state and the open state of the first and second window bodies 13a, 13b. However, the slider 20 can be slid upward or 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 can also be easily pivoted from the open state to the closed state.

[0078] By decreasing the outer diameter of the sprocket 83, the window opening and closing system 10 requires force when sliding the slider 20 upward or downward in the vertical direction. However, the vertical movement dimension (slide distance) of the slider 20 between the closed state and the open state of the first and second window bodies 13a, 13b can be decreased, and the window bodies 13a, 13b can be pivoted from the closed state to the open state and can also be pivoted from the open state to the closed state by sliding the slider 20 only a short distance.

[0079] The first and second rollers 84a and 84b are made of synthetic resin or metal such as aluminum, stainless steel, or other alloys, and are formed in a cylindrical shape. The first roller 84a is housed in the first accommodation space 60a of the first drive unit 17a and is installed (fitted) in the middle part of the first rod 82a. The second roller 84b is housed in the second accommodation space 60b of the second drive unit 17b and is installed (fitted) in the middle part of the second rod 82b.

[0080] The first roller 84a rotates in the clockwise direction (positive direction) or counterclockwise direction (reverse direction) as the first rod 82a rotates, and the second roller 84b rotates in the clockwise direction (positive direction) or counterclockwise direction (reverse direction) as the second rod 82b rotates. The other end of the first wire 15a is connected and fixed to the first roller 84a, and the other end of the second wire 15b is connected and fixed to the second roller 84b.

[0081] When looking at the sprocket 83 from the side of the other end of the first rod 82a, as the first roller 84a rotates counterclockwise, as shown in FIG. 9, the first wire 15a is pulled in the other direction (backward in the front-rear direction) by the first roller 84a. As the first roller 84b rotates clockwise, as shown in FIG. 10, the first wire 15a is fed out from the first roller 84b in one direction (forward in the front-rear direction). When looking at the sprocket 83 from the side of the other end of the second rod 82b, as the second roller 84b rotates clockwise, the second wire 15b is pulled in the other direction (backward in the front-rear direction) by the second roller 84b. As the second roller 84b rotates counterclockwise, the second wire 15b is fed out from the second roller 84b in one direction (forward in the front-rear direction).

[0082] The first and second ring mounting drums 85a and 85b are made of synthetic resin or metal such as aluminum, stainless steel, or other alloys, and are formed in a cylindrical shape. The first ring mounting drum 85a is housed in the first accommodation space of the first drive unit 17a and is installed (fitted) on the side of one end of the first rod 82a (laterally outward of the first roller 84a). The second ring mounting drum 85b is housed in the second accommodation space 60b of the second drive unit 17b and is installed (fitted) on the side of one end of the second rod 82b (laterally outward of the second roller 84b).

[0083] In addition, depending on the size and shape of the window bodies 13a and 13b, the first ring mounting drum 86a may be installed (fitted) in the middle of the first rod 82a, and the first roller 84a may be installed (fitted) on the side of one end of the first rod 82a (laterally outward of the first ring mounting drum 86a). The second ring mounting drum 86b may be installed (fitted) in the middle of the second rod 82b, and the second roller 84b may be installed (fitted) on the side of one end of the second rod 82b (laterally outward of the second ring mounting drum 86b).

[0084] The first and second torsion springs 86a and 86b are made of hard steel wire, stainless steel wire, or phosphor bronze for springs. The first torsion spring 86a is attached to the first ring mounting drum 85a and extends in the axial direction of the first rod 82a. The second torsion spring 86b is attached to the second ring mounting drum 85b and extends in the axial direction of the second rod 82b. The arm shapes of these torsion springs 86a and 86b can use short hooks, straight, single-bend, etc. The outer diameter, inner diameter, and number of turns of these torsion springs 86a and 86b can be arbitrarily set according to the torque required for the upward turning of the first and second window bodies 13a and 13b (shoji) in the vertical direction (the auxiliary force required for the downward sliding of the slider 20 in the vertical direction).

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

[0086] In the second rotation mechanism 23b, with the second ring mounting drum 85b inserted into the second torsion spring 86b, the fixed point of the arm of the second torsion spring 86b is connected and fixed to any one of the first to third plates 56 - 58 of the second drive unit 17b or the bearing plate 59, and the load point of the arm of the second torsion spring 86b is connected (fixed) to the outer peripheral edge of the second rod 82b.

[0087] When the first and second rods 82a, 82b rotate in the clockwise direction and the first and second wires 15a, 15b are fed out in one direction (forward in the front - rear direction) from the first and second rollers 84a, 84b, the first and second torsion springs 86a, 86b are twisted in the winding direction or in the direction opposite to the winding direction. When the first and second torsion springs 86a, 86b 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 and closing system 10, the torque (repulsive force) of the first and second torsion springs 86a, 86b is adjusted so that the load acting on the slider 20 when the window bodies 13a, 13b are pivoted upward from below in the vertical direction is about 1.5 - 2 kg.

[0088] FIG. 11 is a partially enlarged side view of the window opening / closing system 10 with the window bodies 13a, 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, 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. In FIGS. 12 and 14, the traction chain 22 (traction member) is shown in an exposed state.

[0089] An example of the procedure for opening the window bodies 13a, 13b by pivoting the free ends 37 of the first and second window bodies 13a, 13b downward in the vertical direction from the state where the first and second window bodies 13a, 13b are closed is as follows. The window opening / 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, 13b are closed, the first and second wires 15a, 15b are drawn (wound up) in the other direction (backward in the front-rear direction) at the first and second rollers 84a, 84b, the free ends 37 of these window bodies 13a, 13b pivot to the closed position, the rotating ends 36 are airtightly in close contact with the lower frame 25, the first and second side portions 38a, 38b are airtightly in close contact with the first and second side frames 26a, 26b, and the free ends 37 are airtightly in close contact with the upper frame 24.

[0090] Furthermore, the slider 20 is located at the lower end 63 of the guide line 19, the engagement pin 79 of the pivot lever 73 slides (gets over) along the outer peripheral edge 75 of the engagement cam 72 in one direction, the engagement pin 79 moves to the locked position, and the slide (vertical movement) of the slider 20 is locked in a state where the traction chain 22 is given a tension force. In the state where the slide of the slider 20 is locked, as shown in FIG. 7, the pivot lever 73 hangs downward in the vertical direction from the lower end 63 of the guide line 19.

[0091] First, while holding the gripping portion 77 (handle) of the swivel lever 73, press the swivel lever 73 downward in the vertical direction (while pushing it down), and apply a turning force to the gripping portion 77 of the swivel lever 73 in the counterclockwise direction (reverse direction). By applying a turning force to the gripping portion 77, the swivel arm 78 and the engagement pin 79 turn in the counterclockwise direction (reverse direction), and while the engagement pin 79 slides (gets over) the outer peripheral edge 75 of the engagement cam 72 in the other direction, the engagement pin 79 moves to the unlocking position, and the engagement between the engagement pin 79 and the engagement cam 72 is released. When the engagement pin 79 is moved to the unlocking position, the lock on the slide (vertical movement) of the slider 20 is released, and the tension acting on the towing chain 22 is released.

[0092] When the gripping portion 77 of the swivel lever 73 is turned in the counterclockwise direction, the swivel arm 78 also turns in the counterclockwise direction (reverse direction). As shown in FIG. 8, the tip 80 of the swivel arm 78 abuts against the inner surface of the second erection plate 43 of the erection unit 16. When the tip 80 of the swivel arm 78 abuts against the inner surface of the second erection plate 43, the counterclockwise turning of the gripping portion 77 (swivel lever 73) stops at that moment.

[0093] The swivel lever 73 (gripping portion 77) is turned 15 to 20° in the counterclockwise direction (reverse direction) from the state shown in FIG. 7 where it hangs downward from the lower end 63 of the guideline 19, so that the extension dimension of the swivel arm 78 and the positional relationship between the engagement cam 72 and the engagement pin 79 are adjusted to release the lock. Further, when it is turned 15 to 20° in the counterclockwise direction (reverse direction), the extension dimension of the swivel arm 78 is adjusted so that the tip 80 of the swivel arm 78 abuts against the inner surface of the second erection plate 43 of the erection unit 16.

[0094] Next, while gripping the gripping portion 77 (handle) of the swivel lever 73, the slider 20 is slid (pushed up) upward in the vertical direction from the lower end 63 to the upper end 61 of the guide line 19 together with the swivel lever 73. When the slider 20 is slid upward in the vertical direction, the traction chain 22 located in the first chain accommodating portion 46 operates upward in conjunction with the slide of the slider 20, and the sprocket 83 engaged with the traction chain 22 rotates in the clockwise direction. When the sprocket 83 rotates, the first and second rods 82a, 82b (rotation mechanisms 23a, 23b) rotate in the clockwise direction in conjunction with it, and the first and second rollers 84a, 84b rotate in the clockwise direction as the first and second rods 82a, 82b rotate. When the first and second rollers 84a, 84b rotate in the clockwise direction, as shown in FIGS. 13 and 14, the first and second wires 15a, 15b are fed out from the first and second rollers 84a, 84b in one direction (forward in the front-rear direction).

[0095] At the start of the initial movement (start of turning) when the first and second window bodies 13a, 13b are turned from the closed state to the open state, the repulsive forces of the first and second kicking springs 14a, 14b (kicking means) installed on the first side portion 38a and the second side portion 38b of the window bodies 13a, 13b act on the free end portion 37 of the window bodies 13a, 13b, and the free end portion 37 of the first and second window bodies 13a, 13b is pressed (pushed out) forward in the front-rear direction by the repulsive forces (kicking forces) of these kicking springs 14a, 14b, and a turning force downward in the vertical direction is applied to the free end portion 37 of these window bodies 13a, 13b.

[0096] Furthermore, when the first kicking spring 14a (kicking means) is installed on the first contact plate 32 of the first side frame 26a of the first and second window frames 12a and 12b, and the second kicking spring 14b (kicking means) is installed on the second contact plate 34 of the second side frame 26b of the first and second window frames 12a and 12b, the repulsive forces of these kicking springs 14a and 14b (kicking means) act on the free ends 37 of the window bodies 13a and 13b. Due to the repulsive forces (kicking forces) of the kicking springs 14a and 14b, the free ends 37 of the first and second window bodies 13a and 13b are pressed (pushed out) forward in the front-rear direction, and a turning force downward in the vertical direction is applied to the free ends 37 of these window bodies 13a and 13b.

[0097] When the free ends 37 of the first and second window bodies 13a and 13b turn from the closed position to the open position at the start of movement, the first and second window bodies 13a and 13b turn by utilizing the repulsive forces of the first and second kicking springs 14a and 14b. In the turning process except for the start of movement, due to the self-weight of the window bodies 13a and 13b, the free ends 37 of the window bodies 13a and 13b automatically turn downward in the vertical direction around the rotation end 36.

[0098] When the free ends 37 of the first and second window bodies 13a and 13b automatically turn downward in the vertical direction, the first and second wires 15a and 15b are automatically fed out in one direction (forward in the front-rear direction), the first and second rods 82a and 82b (rotation mechanisms 23a and 23b) automatically rotate in the clockwise direction, and the sprocket 83 automatically rotates in the clockwise direction. Furthermore, the towing chain 22 automatically operates upward, and the slider 20 automatically slides upward toward the upper end 61 of the guide line 19.

[0099] When the first wire 14a is fed out from the first roller 84a in one direction (forward in the front-rear direction) and the first rod 82a (first ring mounting drum 85a) rotates in the clockwise direction, the first torsion spring 86a 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 twists in the winding direction. When the second wire 14b is fed out from the second roller 84b in one direction (forward in the front-rear direction) and the second rod 84b (second ring mounting drum 85b) rotates in the clockwise direction, the second torsion spring 86b 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 twists in the winding direction.

[0100] When the first and second torsion springs 86a and 86b twist in the direction opposite to the winding direction or twist 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 angle by which they are twisted, and the torque of these torsion springs 86a and 86b applies a turning force to the free ends 37 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.

[0101] The window opening and closing system 10 slides the slider 20 upward in the vertical direction from the lower end 63 to the upper end 61 of the guideline 19 to the intermediate portion 62 (the vertical center area of the erection unit 16) to operate the traction chain 22 (traction member) upward in the vertical direction. By the upward operation of the traction chain 22, the sprocket 83 (rotation mechanisms 23a and 23b) is rotated to feed out the first and second wires 15a and 15b from the first and second rollers 84a and 84b, and the first and second window bodies 13a and 13b are pivoted from the closed state to the open state. Therefore, by simply sliding the slider 20 upward in the vertical direction, the window bodies 13a and 13b can be pivoted from the closed state to the open state without requiring labor and time, and the first and second window bodies 13a and 13b can be smoothly pivoted from the closed state to the open state to easily open these window bodies.

[0102] The window opening and closing system 10 utilizes the repulsive force (unwinding force) of the first and second kicking springs 14a and 14b (kicking means) when the free ends 37 of the first and second window bodies 13a and 13b pivot from the closed position to the open position, and pivots while utilizing this force. During the pivoting process except for the initial movement, the free ends 37 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. Therefore, by utilizing the repulsive force of the first and second kicking springs 14a and 14b, the window bodies 13a and 13b can be reliably pivoted when the slider 20 slides upward in the vertical direction at the initial movement. By sliding the slider 20 upward, the window bodies 13a and 13b can be smoothly pivoted from the closed state to the open state, and the window bodies 13a and 13b can be easily opened. The window opening and closing system 10 causes the free ends 37 of the window bodies 13a and 13b to pivot by the repulsive force (unwinding force) of the first and second kicking springs 14a and 14b (kicking means) at the initial movement, and during the pivoting process except for the initial movement, the free ends 37 of the first and second window bodies 13a and 13b automatically pivot downward in the vertical direction due to the self-weight of the window bodies 13a and 13b. Thus, in an emergency, the window bodies 13a and 13b can be opened all at once without requiring the sliding operation of the slider 19.

[0103] When the window opening and closing system 10 unlocks by rotating the gripping portion 77 (swing lever 73) counterclockwise (either forward or reverse) with the slide of the slider 20 locked, and moving the engagement pin 79 to the unlocking position where it slides (crosses over) the outer peripheral edge 75 of the engagement cam 72, the lock can be easily released from the locked state where the slide of the slider 20 is locked, and the first and second window bodies 13a and 13b can be easily opened.

[0104] Since the window opening and closing system 10 unlocks by pivoting the gripping portion 77 (swing lever 73) by 15 - 20° from the state where the slide of the slider 20 is locked, the lock can be easily and quickly released without significantly pivoting the gripping portion 77 (swing lever 73) (for example, pivoting by 90°) from the state where the slide of the slider 20 is locked.

[0105] An example of the procedure for closing the window bodies 13a and 13b by pivoting the free ends 37 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 77 (handle) of the pivot lever 73, the slider 20 is slid (pushed down) downward in the vertical direction from the upper end 61 to the lower end 63 of the guideline 19 together with the pivot lever 73. Incidentally, the torque (repulsive force) of the first and second torsion springs 86a and 86b adjusts the load (kg) acting on the slider 20 when the window bodies 13a and 13b are pivoted upward from the lower direction to the upper direction to about 1.5 to 2 kg.

[0106] When the slider 20 is slid downward, the towing chain 22 operates downward in the vertical direction in conjunction with the slide of the slider 20, and the sprocket 83 engaged with the towing chain 22 rotates in the counterclockwise direction. When the sprocket 83 rotates, the first and second rods 82a and 82b (rotation mechanisms 23a and 23b) rotate in the counterclockwise direction in conjunction with it, and the first and second wires 15a and 15b are wound around the first and second rollers 85a and 84b in the other direction (rearward in the front-rear direction).

[0107] As the first and second wires 15a and 15b are wound around the first and second rollers 84a and 84b, the free ends 37 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 86a and 86b applies a pivoting force to the free ends 37 of the first and second window bodies 13a and 13b to pivot from the open position toward the closed position, the entire self-weight of the window bodies 13a and 13b does not act on the slide of the slider 20, and a load (in the range of 1.5 to 2 kg) obtained by subtracting the repulsive force of the torsion springs 86a and 86b from the self-weight of the window bodies 13a and 13b acts on the slider 20.

[0108] By sliding (pushing down) the slider 20 to the lower end 63 of the guideline 19, the first and second window bodies 13a, 13b pivot from the open state to the closed state. When the first and second window bodies 13a, 13b are closed, the twists of the first and second torsion springs 86a, 86b return, and the torques of these torsion springs 86a, 86b become zero. Incidentally, before the free ends 37 of the window bodies 13a, 13b pivot to the closed position, the free ends 37 are pivoted upward in the vertical direction against the repulsive forces of the kick-out springs 14a, 14b, and with the repulsive forces of the kick-out springs 14a, 14b acting on the free ends 37, the first and second window bodies 13a, 13b are closed. After sliding the slider 20 to the lower end 63 of the guideline 19, while holding the gripping portion 77 of the pivot lever 73, while pressing (pushing down) the pivot lever 73 downward in the vertical direction, a turning force is applied to the gripping portion 77 in the clockwise direction (positive direction).

[0109] By applying a turning force to the gripping portion 77 and pivoting the pivot lever 73 15 to 20° in the clockwise direction (positive direction), the engagement pin 79 pivots in the clockwise direction (positive direction), and the engagement pin 79 slides (gets over) along the outer peripheral edge 75 of the engagement cam 72 in one direction, the engagement pin 79 moves to the lock position, and the engagement pin 79 engages with the engagement cam 72. When the engagement pin 79 is moved to the lock position, the pivot lever 73 hangs downward from the lower end 63 of the guideline 18, a tension force is applied to the towing chain 22, and the sliding (vertical movement) of the slider 20 is locked. When the engagement pin 79 is moved to the lock position and a tension force is applied to the towing chain 22, the rotating end 36 adheres airtightly to the lower frame 25, the first and second side portions 38a, 38b adhere airtightly to the first and second side frames 26a, 26b, and the free end 37 adheres airtightly to the upper frame 24.

[0110] The window opening / closing system 10 slides the slider 20 downward from the upper end 61 of the guide line 19 to operate the towing chain 22 (towing member) downward in the vertical direction. By operating the towing chain 22 downward, the sprockets 83 (rotating mechanisms 23a, 23b) are rotated to wind the first and second wires 15a, 15b around the first and second rollers 84a, 84b, 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 20 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 20 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.

[0111] When the window opening / closing system 10 closes the opened window bodies 13a, 13b, it rotates the gripping portion 77 of the pivoting lever 73 in the clockwise direction (positive direction) at the lower end 63 of the guide line 19, moves the engaging pin 79 of the pivoting lever 69 to the locking position where it slides (gets over) the outer peripheral edge 75 of the engaging cam 72, and locks the sliding (vertical movement) of the slider 20 while applying a tension force to the towing chain 22. Therefore, by moving the engaging pin 79 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 securely and confidentially closed in a complete state.

[0112] The window opening / closing system 10 locks the sliding of the slider 20 while applying tension to the traction chain 22, so the traction chain 22 will not slacken, and the first and second window bodies 13a, 13b can be hermetically closed, preventing (blocking) the flow of air when those window bodies 13a, 13b are closed. The window opening / closing system 10 can lock the sliding of the slider 20 by turning the gripping portion 77 of the turning lever 73 by 15 to 20° from the state where the lock of the slider 20 is released. Therefore, the sliding of the slider 20 can be simply and quickly locked without turning the gripping portion 77 of the turning lever 73 greatly (for example, turning by 90°) from the state where the lock of the slider 20 is released.

[0113] When closing the first and second window bodies 13a, 13b in the open state without using the first and second torsion springs 86a, 86b, a considerable force is required to slide the slider 20 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 of those torsion springs 86a, 86b promotes the winding of the first and second wires 15a, 15b around the first and second rollers 84a, 84b, and the torque of those torsion springs 86a, 86b is adjusted so that the load acting on the slider 20 when the window bodies 13a, 13b are pivoted upward from the downward direction in the vertical direction is about 1.5 to 2 kg. Therefore, by using those torsion springs 86a, 86b, the slider 20 can be slid downward in the vertical direction without requiring a large force, and the first and second window bodies 86a, 86b can be smoothly pivoted from the open state to the closed state to easily close the window bodies 86a, 86b.

[0114] FIG. 15 is a side view of the installation unit 16 shown as another example, and FIG. 16 is a side view of the installation unit 16 shown in a state where the slider 20 abuts against the stopper 87. FIG. 17 is a partially enlarged view of the installation unit 16 showing a state where the slider 2- is fixed to a predetermined position on the guideline 19 by the set screw 88, and FIG. 18 is a cross-sectional view taken along the line A-A of FIG. 17. The difference between the installation unit 16 shown in FIGS. 15 to 18 and that in FIG. 4 is that a stopper 87 is installed at a predetermined position on the guideline 19 of the installation unit 16, and a set screw 88 (fixing means) is installed on the slider 20.

[0115] Since the other configurations of the window opening and closing system 11 provided with the installation unit 16 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 16 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 given, so that the description of the configuration of the installation unit 16 is omitted.

[0116] A stopper 87 is detachably attached to the guideline 19 of the installation unit 16. The stopper 87 is installed at a predetermined position (base plate 44 or connecting plate 55) in the middle part 62 (moving space) of the guideline 19 by a predetermined connecting means. The upper end of the upper plate 64 of the slider 20 that slides upward in the vertical direction abuts against the stopper 87. When the upper end of the upper plate 64 abuts against the stopper 87, the further upward sliding of the slider 20 stops.

[0117] The installation position of the stopper 87 in the middle part 62 (moving space) of the guideline 19 can be arbitrarily determined. By adjusting the installation position of the stopper 87 in the middle part 62 of the guideline 19, the vertical movement distance (slide distance) of the slider 20 on the guideline 19 can be adjusted, and the downward turning angle (opening area) of the first and second window bodies 13a, 13b in the vertical direction can be adjusted.

[0118] Release the lock on the slide (vertical movement) of the slider 20, and when sliding the slider 20 upward in the vertical direction from the lower end 63 to the upper end 61 of the guide line 19 together with the swivel lever 73 (when pushing it up), during the swiveling process, due to the self-weight of the first and second window bodies 13a, 13b, the free ends 37 of the window bodies 13a, 13b automatically swivel downward in the vertical direction around the rotating end 36, and at the same time, the slider 20 automatically slides upward toward the upper end 61 of the guide line 19. However, when the upper end of the upper plate 64 of the slider 20 abuts against the stopper 87, the slide of the slider 20 on the guide line 19 stops. At that point, the upward operation of the traction chain 22 in the vertical direction stops, the clockwise rotation of the sprocket 83 stops, and the payout of the first and second wires 15a, 15b in one direction (forward in the front-rear direction) stops.

[0119] When the slider 20 abuts against the stopper 87 and the payout of the wires 15a, 15b stops, the downward swiveling of the free ends 37 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 87 in the middle part 62 (moving space) of the guide line 19, and the opening areas of these window bodies 13a, 13b when they are opened are different.

[0120] The stop screw 88 (fixing means) is made of metal such as aluminum, stainless steel, or other alloys, or synthetic resin, and is formed by an operation part 89 (head), a screw part 90, and a slide stop roller 91. In the stop screw 88, the top of the screw part 90 is fixed to the operation part 89, and the slide stop roller 91 is inserted and fixed to the bottom of the screw part 90. The screw part 90 is screwed into a screw hole (threaded hole) formed in the upper plate 64 of the slider 20. When the operation part 89 of the stop screw 88 is rotated in the clockwise direction (positive direction), the screw part moves forward (moves) toward the connection plate 55 (base plate 44) of the erection unit 16. When the operation part 89 of the stop screw 88 is rotated in the counterclockwise direction (reverse direction), the screw part moves backward (moves) in a direction away from the connection plate 55 (base plate 44) of the erection unit 16.

[0121] To use the stop screw 88, while gripping the swivel lever 73, in the process of gradually sliding the slider 20 upward in the vertical direction from the lower end 63 to the upper end 61 of the guide line 19 together with the swivel lever 73, the slide of the slider 20 is stopped at a predetermined position of the guide line 19. When the slide of the slider 20 is stopped, the operation part 89 (head) of the stop screw 88 is rotated in the counterclockwise direction (reverse direction), and the screw part 90 is retracted so as to be separated from the connection plate 55 (base plate 44) of the erection unit 16. When the screw part 90 is retracted, the tapered part of the slide stop roller 91 attached to the screw part 90 abuts against the protruding parts protruding inward from the inner surfaces of the second and third guide plates 50, 52, and at that time, the slider 20 is fixed to the erection unit 15. By fixing the slider 20 to the erection unit 15, further upward sliding of the slider 20 is blocked, and the feeding of the first and second wires 15a, 15b in one direction (forward in the front-rear direction) stops.

[0122] When the tapered portion of the slide stopper roller 91 of the set screw 88 abuts against the protrusions on the inner surfaces of the second and third guide plates 50 and 52 and the feeding of the wires 15a and 15b stops, the downward pivoting in the vertical direction of the free ends 37 of the first and second window bodies 13a and 13b stops. The downward pivoting 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 20 in the guide line 19 using the set screw 88, and the opening areas when the window bodies 13a and 13b are opened are different.

[0123] After fixing the slider 20 to the connecting plate 55 with the set screw 88, to release the fixing of the slider 20, rotate the operating portion 89 of the set screw 88 in the clockwise direction (positive direction) to advance the screw portion 90 toward the connecting plate 55 (base plate 44). When the screw portion 90 advances, the tapered portion of the slide stopper roller 91 separates from the protrusions on the inner surfaces of the second and third guide plates 50 and 52, the pressing of the protrusions on the inner surfaces of the second and third guide plates 50 and 52 by the tapered portion of the slide stopper roller 91 is released, the fixing of the slider 20 is released, and the slider 20 can slide in the vertical direction.

[0124] The window opening and closing system 11 can adjust the upward movement distance (slide distance) of the slider 20 from the lower end 63 of the guide line 19 by adjusting the installation position of the stopper 87 in the guide line 19, and can adjust the downward pivoting angle of the rotating ends 36 of the first and second window bodies 13a and 13b from the upper frame 24. Therefore, the opening area of the window bodies 13a and 13b when opened can be adjusted by the stopper 87, and the air volume of the air flowing through the window bodies 13a and 13b can be adjusted.

[0125] The window opening / closing system 11 can open the window main bodies 13a and 13b with the free ends 37 of the window main bodies 13a and 13b pivoted downward from the upper frame 24 at an arbitrary angle by fixing the slider 20 at a predetermined position on the guide line 19 using the set screw 88 (fixing means). Therefore, the opening area of the window main bodies 13a and 13b at the time of opening can be adjusted using the set screw 88, and the air volume of the air flowing through the window main bodies 13a and 13b can be adjusted.

Explanation of Signs

[0126] 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 kick-out spring 14b Second kick-out spring 15a First wire 15b Second wire 16 Erection unit 17a First drive unit 17b Second drive unit 18 Chain operating means 19 Guide line 20 Slider 21 Lock mechanism 22 Towing chain (towing member) 23a First rotation mechanism 23b Second rotation mechanism 24 Upper frame 25 Lower frame 26a First side frame 26b Second side frame 27 Upper frame plate 28 Upper contact plate 29 Lower frame plate 30 Lower contact plate 31 First side frame plate 32 First contact plate 33 Second side frame 34 Second contact plate 35 Window equipment 36 Rotating end (rotating frame) 37 Free end (swiveling frame) 38a First side part (first lateral frame) 38b Second side part (second lateral frame) 39 Shoji fitting 40 Upper end 41 Lower end 42 First installation plate 43 Second installation plate 44 Base plate 45 Cover plate 46 First chain housing space (first guide recess) 47 Second chain housing space (second guide recess) 48 Housing space 49 First guide plate 50 Second guide plate 51 First guide base plate 52 Third guide plate 53 Fourth guide plate 54 Second guide base plate 55 Connecting plate 56 First plate 57 Second plate 58 Third plate 59 Bearing plate 60a First housing space 60b Second housing space 61 Upper end 62 Middle part (moving space) 63 Lower end 64 Upper plate 65 Lower plate 66 One end 67 First connecting part 68 Second connecting part 69 Screw hole (threaded hole) 70 Adjusting screw 71 Screw part 72 Engaging cam 73 Swivel lever (swivel handle) 75 Outer peripheral edge 76 Rotating base end portion 77 Gripping portion (handle) 78 Swivel arm 79 Engagement pin 80 Tip 81 Other end portion (free end) 82a First rod 82b Second rod 83 Sprocket 84a First roller 84b Second roller 85a First ring mounting drum 85b Second ring mounting drum 86a First torsion spring 86b Second torsion spring 87 Stopper 88 Set screw (fixing means) 89 Operating portion 90 Threaded portion 91 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 wire 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 wire actuating means for feeding the wire in one direction to pivot the window body from the closed state to the open state and pulling the wire in the other direction to pivot the window body from the open state to the closed state. The window opening and closing system further includes: Kicking means for applying a pivoting force to the window body at the start of pivoting the window body from the closed state to the open state, which is installed on either the window frame or the window body; the wire actuating means includes a guide line located below the window frame and extending in the vertical direction, a slider sliding vertically along the guide line, a traction member connected to the slider and moving vertically as the slider slides vertically, and a rotation mechanism that rotates with the vertical movement of the traction member, winds up the wire, and feeds out the wire. 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 a first and a second side frame 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 either the first side frame or 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 it slides the slider vertically along the guide line to operate the traction member vertically, rotates the rotation mechanism while feeding out the wire in one direction, applies a pivoting force to the window body using the kicking force of the kicking means at the start of movement to pivot the window body from the closed state to the open state, or slides the slider vertically along the guide line to operate the traction member vertically, rotates the rotation mechanism while pulling the wire in the other direction to pivot the window body from the open state to the closed state.

2. The window opening and closing system slides the slider upward in the vertical direction from the lower end of the guide line to operate the traction member upward in the vertical direction, pays out the wire in one direction while rotating the rotation mechanism, and applies a turning force to the window body using the kicking force of the kicking means at the initial movement to turn the window body from the closed state to the open state. Then, 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 the wire is pulled in the other direction while rotating the rotation mechanism to turn the window body from the open state to the closed state. The window opening and closing system according to claim 1.

3. The kicking means is a kicking spring that applies a turning force to the window body at the initial movement when the free end of the window body turns from the closed position to the open position. The window body is rotatably installed on the lower frame and has a rotating end that is airtightly adhered to the lower frame in the closed state, and a free end that turns to a closed position where it is airtightly adhered to the upper frame in the closing operation and turns to an open position downward in the vertical direction in the opening operation. It also has first and second side portions that extend in the vertical direction while being spaced apart and opposed to each other laterally. A pair of the kicking springs are installed on the first and second side frames or the first and second side portions. The window opening and closing system is configured such that at the initial movement when the free end of the window body turns from the closed position to the open position, a turning force is applied by the repulsive force of the kicking springs and the window body turns. During the turning process except for the initial movement, the free end of the window body automatically turns downward in the vertical direction due to the self-weight of the window body. Before the free end of the window body turns to the closed position, the free end turns upward in the vertical direction against the repulsive force of the kicking springs. The window opening and closing system according to claim 1 or claim 2.

4. The traction member is a traction chain having one end connected to the slider and moving up and down as the slider slides in the vertical direction, and the rotation mechanism is a rod rotatably installed on the window frame and extending in the horizontal direction, a sprocket formed on one side of the rod and engaged with the traction chain and rotating as the traction chain moves up and down, and a roller formed on the other side of the rod and connected to the wire, and configured to pay out the wire and wind up the wire as the sprocket rotates. The window opening and closing system according to any one of claims 1 to 3.

5. 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 twisted angle when twisted in the winding direction or the direction opposite to the winding direction. When the rod rotates in the direction of paying out the wire, 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 wire, and the winding of the wire around the roller is promoted by the torque of the torsion spring. The window opening and closing system according to claim 4.

6. The erection unit is formed of 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 movably in the vertical direction 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 movably in the vertical direction 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 wire actuating 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. **Claim 8**: The locking mechanism is formed by an engaging cam formed at the lower end of the guideline and a pivoting lever rotatably installed at the lower end of the slider and having an engaging pin at a rotating base end located at the lower end of the slider, and the engaging pin moves along the outer peripheral edge of the engaging cam. The window opening and closing system moves the slider to the lower end of the guideline and then rotates the pivoting lever either forward or backward to move the engaging pin to a predetermined locking position along the outer peripheral edge of the engaging cam, thereby locking the slide of the slider with the traction chain under tension. With the slide of the slider locked, the pivoting lever is rotated in the other direction (either forward or backward) to move the engaging pin to a predetermined unlocking position along the outer peripheral edge of the engaging cam, enabling the slider to slide. The window opening and closing system according to claim 7. **Claim 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. 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 on the guideline, and can adjust the downward pivoting 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. **Claim 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. The window opening and closing system can fix the slider at a predetermined location on the guideline using the fixing means during the process of sliding the slider vertically on the guideline, and can open the window body with the free end of the window body pivoted downward at an arbitrary angle from the upper frame. The window opening and closing system according to any one of claims 1 to 9.

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