Window opening / closing system

Abstract

To provide a window opening / closing system that can smoothly rotate a window body to easily open and close the window body with less labor and time.SOLUTION: In a window opening / closing system 10, a slider 19 is slid upward along a vertical direction from a bottom edge of a guideline 18 to move a traction chain upward along the vertical direction, and first and second rollers are rotated by the rotation of sprockets engaged with the traction chain to pay out first and second turning chains in one direction, which rotates window bodies 13a and 13b from a closed state to an open state. The slider 19 is slid downward along the vertical direction from a top edge of the guideline 18 to move the traction chain downward along the vertical direction, and the first and second rollers are rotated by the rotation of the sprockets to pull the first and second turning chains in the other direction, which rotates the window bodies 13a and 13b from the open state to the closed state.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

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

[0003] [Patent Document 1] JP 2015-190236 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the window opening and closing device disclosed in Patent Document 1, when closing a sash (window body) that is in an open state, the operator rotates the winding handle in a direction in which the wire is wound up. The operation of rotating the winding handle requires the operator to rotate the winding handle multiple times, which makes the closing operation troublesome for the operator and takes time and effort to close a sash that is in an open state. Furthermore, if the winding handle is installed in a position away from the window and it is difficult to tell the open / closed state of the window while operating the winding handle, it is difficult to know how far the winding handle needs to be rotated to close the sash, and there are cases where the rotation of the handle is stopped halfway through closing the sash, leaving the sash in an incomplete state.

[0005] The object of the present invention is to provide a window opening and closing system that can easily open a window body by smoothly rotating the window body from a closed state to an open state without requiring time and effort, and can easily close the window body by smoothly rotating the window body from an open state to a closed state. Another object of the present invention is to provide a window opening and closing system that can clearly confirm the closed position of the window body, and can reliably close the window body in a complete state without leaving the window body in an incompletely closed state. [Means for solving the problem]

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

[0007] The present invention is characterized in that the chain operating means is composed of a guideline located below the window frame and extending in the vertical direction, a slider that slides in the vertical direction along the guideline, a pulling member that is connected to the slider and moves up and down as the slider slides in the vertical direction, and a rotation mechanism that rotates in conjunction with the up and down movement of the pulling member, winding up the swivel chain and letting out the swivel chain; the window frame is formed of upper and lower frames extending laterally and spaced apart in the vertical direction, and first and second side frames extending vertically and spaced apart in the horizontal direction, the window opening and closing system includes an installation unit extending downward from either the first side frame or the second side frame forming the window frame, and a guide line is formed on the installation unit and is located below the window frame and extends vertically; The window opening and closing system operates a pulling member in the vertical direction by sliding a slider vertically on a guideline, and rotates a rotating mechanism while pulling out a swivel chain in one direction to rotate the window body from a closed state to an open state, or rotates a rotating mechanism while pulling the swivel chain in the other direction to rotate the window body from an open state to a closed state.

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

[0009] In another example of the present invention, the window body has a rotating end that is rotatably connected to the lower frame and hermetically seals against the lower frame in a closed state, and a free end that swivels to a closed position in which it is hermetically sealable against the upper frame during a closing operation, and swivels to an open position vertically downward during an opening operation, and the swivel chain exerts a payout force that assists in the rotation of the free end due to its linearity during the initial movement of rotating the window body from the closed state to the open state, and the window opening and closing system uses the payout force of the swivel chain to rotate the free end of the window body during the initial movement of rotating from the closed position to the open position, and the free end of the window body automatically rotates vertically downward due to the weight of the window body during the rotation process except during the initial movement.

[0010] In another example of the present invention, the traction member is a traction chain having one end connected to the slider and moving up and down as the slider slides up and down, and the rotation mechanism is formed from a rod rotatably mounted on the window frame and extending laterally, a sprocket formed on one side of the rod with which the traction chain engages and which rotates as the traction chain moves up and down, and a roller formed on the other side of the rod to which the swivel chain is connected, which pays out the swivel chain as the sprocket rotates and winds up the swivel chain.

[0011] In another example of the present invention, the rotation mechanism includes a torsion spring that is installed on the other side of the rod and that, when twisted in the winding direction or in the opposite direction to the winding direction, exerts a torque in the opposite direction proportional to the twist angle, and when the rod rotates in the direction to pay out the swivel chain, the torsion spring twists in the winding direction or in the opposite direction to the winding direction, and the torsion spring exerts a torque in the direction pulling the swivel chain, and the torque of the torsion spring helps wind the swivel chain around the roller.

[0012] In another example of the present invention, an installation unit is formed from a first guide plate and a second guide plate extending in the vertical direction opposite each other, and a base plate located between the first and second guide plates and extending in the vertical direction, a first chain accommodating space that accommodates the towing chain so that it can move up and down is formed on the side of the first guide plate and extends in the vertical direction, and a second chain accommodating space that accommodates the towing chain so that it can move up and down is formed on the side of the second guide plate and extends in the vertical direction.

[0013] In another example of the present invention, the chain operating means includes a locking mechanism that applies tension to the traction chain and locks the sliding of the slider when the slider is slid downward in the vertical direction and positioned at the lower end of the guideline.

[0014] In another example of the present invention, the locking mechanism is formed from an engagement cam formed at the lower end of the guideline, and a swivel lever rotatably installed at the lower end of the slider, having an engagement pin at its rotating base end located at the lower end of the slider, with the engagement pin moving along the outer peripheral edge of the engagement cam, and the window opening and closing system moves the slider to the lower end of the guideline, and then rotates the swivel lever in either forward or reverse direction and moves the engagement pin to a predetermined locking position along the outer peripheral edge of the engagement cam, thereby locking the sliding of the slider with tension applied to the traction chain, and with the sliding of the slider locked, rotates the swivel lever in either forward or reverse direction and moves the engagement pin to a predetermined unlocking position along the outer peripheral edge of the engagement cam, allowing the slider to slide on the guideline.

[0015] In another example of the present invention, a window opening and closing system includes a stopper that is removably installed at a predetermined location on the guideline and stops the slider from sliding vertically, and by adjusting the installation position of the stopper on the guideline, the window opening and closing system can adjust the vertical sliding distance of the slider from the lower end of the guideline and the downward rotation angle of the free end of the window body from the upper frame.

[0016] In another example of the present invention, a window opening and closing system includes a fixing means that is attached to the slider and fixes the slider to a predetermined position on the guideline, and the window opening and closing system can fix the slider at a predetermined position on the guideline using the fixing means in the process of sliding the slider up and down on the guideline, and can open the window body with the free end of the window body pivoted downward from the upper frame at any angle. Effect of the Invention

[0017] According to the window opening and closing system of the present invention, the slider is slid vertically on the guideline to operate the towing member vertically to rotate the rotation mechanism while pulling out the swivel chain in one direction to rotate the window body from a closed state to an open state, so that the window body can be rotated from a closed state to an open state just by sliding the slider vertically, and the window body can be smoothly rotated from a closed state to an open state without requiring time and effort, and the window body can be easily opened. According to the window opening and closing system of the present invention, the slider is slid vertically on the guideline to operate the towing member vertically to rotate the rotation mechanism while pulling the swivel chain in the other direction to rotate the window body from an open state to a closed state, so that the window body can be rotated from an open state to a closed state just by sliding the slider vertically, and the window body can be smoothly rotated from an open state to a closed state without requiring time and effort, and the window body can be easily closed. When closing an open window body with the window opening and closing system, there is no need to rotate the winding handle multiple times as in the conventional technology; instead, the slider can be slid up and down, and the open window body can be closed in a short time with a simple sliding operation.

[0018] A window opening and closing system in which the slider is slid upward in the vertical direction from the lower end of the guideline to operate the towing member upward in the vertical direction, the rotating mechanism is rotated while the swivel chain is paid out in one direction to rotate the window body from a closed state to an open state, and the slider is slid downward in the vertical direction from the upper end of the guideline to operate the towing member downward in the vertical direction, and the rotating mechanism is rotated while pulling the swivel chain in the other direction to rotate the window body from an open state to a closed state, can rotate the window body from a closed state to an open state simply by sliding the slider upward and downward, requiring no effort or time, and can easily open the window body by smoothly rotating the window body from a closed state to an open state, and can also rotate the window body from an open state to a closed state simply by sliding the slider downward in the vertical direction, requiring no effort or time, and can easily close the window body by smoothly rotating the window body from an open state to a closed state. When closing an open window body with the window opening and closing system, it is not necessary to rotate the winding handle multiple times as in the conventional technology, but rather it is only necessary to slide the slider downward in the vertical direction, and the open window body can be closed in a short time with a simple sliding operation.

[0019] A window opening and closing system in which the window frame is formed from upper and lower frames and first and second side frames, the window body has a rotating end rotatably connected to the lower frame and a free end which rotates to an open position downward in the vertical direction, the swivel chain exerts a retracting force that assists the rotation of the free end due to its linearity at the initial movement of rotating the window body from a closed state to an open state, and the free end of the window body rotates using the retracting force of the swivel chain at the initial movement of rotation, and the free end of the window body automatically rotates downward in the vertical direction due to the window body's own weight during the rotation process except for the initial movement, is able to reliably rotate the window body when the slider is slid in the vertical direction (upward in the vertical direction) by utilizing the retracting force of the swivel chain and the window body's own weight, and can smoothly rotate the window body from a closed state to an open state without time and effort by sliding the slider in the vertical direction (upward in the vertical direction), thereby easily opening the window body. In the window opening and closing system, the free end of the window body automatically rotates downward in the vertical direction due to the weight of the window body during the rotation process except at the initial movement, so that in an emergency the window body can be opened in one go without the need to slide the slider.

[0020] The window opening and closing system is formed of a traction chain having one end connected to a slider and moving up and down as the slider slides up and down, a rotation mechanism rotatably mounted on the window frame and extending laterally, a sprocket that rotates with the up and down movement of the traction chain, and a roller that pays out the swivel chain and winds it up as the sprocket rotates, and the slider slides up and down (upward in the vertical direction) on the guideline to operate the traction chain in the vertical direction, and the operation of the traction chain in the vertical direction (upward in the vertical direction) rotates the sprocket to pay out the swivel chain from the roller and rotates the window body from a closed state to an open state. Therefore, the window body can be rotated from a closed state to an open state simply by sliding the slider up and down (upward in the vertical direction), and the window body can be smoothly rotated from a closed state to an open state without requiring much effort and time, and can be easily opened. In addition, the sprocket is rotated by the vertical (vertical downward) operation of the traction chain, which winds the swivel chain onto the roller and rotates the window body from the open state to the closed state. Therefore, the window body can be rotated from the open state to the closed state simply by sliding the slider vertically (vertical downward), which saves time and effort and allows the window body to be smoothly rotated from the open state to the closed state and easily closed.

[0021] A window opening and closing system in which the rotating mechanism includes a torsion spring that exerts a torque in the opposite direction proportional to the angle of twist, and when the rod rotates in the direction that pays out the swivel chain, the torsion spring twists in the winding direction or in the opposite direction to the winding direction, and the torsion spring exerts a torque in the direction that pulls the swivel chain (winding direction), and the torque of the torsion spring helps to wind the swivel chain around the roller.When closing a window body that is in an open state, force is required to slide the slider downward or upward in the vertical direction due to the weight of the window body, but since the torque of the torsion spring helps to wind the swivel chain around the roller, by utilizing the torsion spring, the slider can be slid downward or upward in the vertical direction without requiring much force, and the window body can be smoothly rotated from the open state to the closed state, making it easy to close the window body.

[0022] A window opening and closing system includes an installation unit extending downward from either one of a first side frame or a second side frame that form a window frame, and a guideline is formed on the installation unit and is located below the window frame and extends in the vertical direction.By forming the guideline on the installation unit so that it extends in the vertical direction from below the window frame, the slider is positioned in a position where it is easy to apply force to the slider, and the slider can be easily slid upwards or downwards in the vertical direction, so that the window body can be smoothly rotated from a closed state to an open state to easily open the window body, and also the window body can be smoothly rotated from an open state to a closed state to easily close the window body.

[0023] The window opening and closing system is formed of a first guide plate and a second guide plate extending in the vertical direction facing each other and a base plate located between the first and second guide plates and extending in the vertical direction, a first chain accommodating space for accommodating the traction chain so as to be movable up and down is formed on the first guide plate side and extends in the vertical direction, and a second chain accommodating space for accommodating the traction chain so as to be movable up and down is formed on the second guide plate side and extends in the vertical direction. The traction chain is accommodated in the first and second chain accommodating spaces so as to be movable up and down, so that the slider can be moved. The guideline is slid vertically (the slider is moved vertically upward from the bottom end of the guideline) to operate the traction chain vertically in the first and second chain storage spaces, and the operation of the traction chain rotates the sprocket to unwind the swivel chain from the roller and rotate the window body from a closed state to an open state. Therefore, the window body can be rotated from a closed state to an open state simply by sliding the slider vertically (vertically upward), and the window body can be smoothly rotated from a closed state to an open state without requiring much effort or time, and can be easily opened. The window opening and closing system operates the traction chain in the vertical direction in the first and second chain storage spaces by sliding the slider vertically on the guideline (the slider vertically downward from the top end of the guideline), and the operation of the traction chain rotates the sprocket to wind the swivel chain onto the roller and rotate the window body from an open state to a closed state. Therefore, the window body can be rotated from an open state to a closed state simply by sliding the slider vertically (vertically downward), and the window body can be smoothly rotated from an open state to a closed state and easily closed without taking time and effort.

[0024] A window opening and closing system including a locking mechanism that applies tension to the traction chain and locks the sliding of the slider when the slider is slid vertically downward and positioned at the bottom end of the guideline, by locking the sliding (up and down movement) of the slider with the locking mechanism, makes it possible to clearly confirm the closed position of the window body, prevents the window body from being left in an incompletely closed state, and ensures that the window body is closed in a complete state. Because the window opening and closing system locks the sliding of the slider with tension applied to the traction chain, the traction chain will not slacken, the window body can be closed airtight, and air flow when the window body is closed can be prevented.

[0025] The lock mechanism is formed of an engagement cam formed at the lower end of the guideline, and a rotating lever rotatably installed at the lower end of the slider, having an engagement pin at a rotation base end located at the lower end of the slider, with the engagement pin moving along the outer periphery of the engagement cam. After the slider is moved to the lower end of the guideline, the rotating lever is rotated in either the forward or reverse direction, and the engagement pin is moved along the outer periphery of the engagement cam to a predetermined lock position, thereby locking the slider slide with tension applied to the traction chain, and with the slider slide locked, the rotating lever is rotated in either the forward or reverse direction, and the engagement pin is moved to a predetermined lock position. The window opening and closing system, which allows the slider to slide on the guideline by moving the engaging cam to a predetermined unlocking position along the outer periphery of the engaging cam, rotates the swivel lever in either direction at the lower end of the guideline, moves the engaging pin to a predetermined locking position along the outer periphery of the engaging cam, and locks the slider's sliding (up and down movement) while applying tension to the traction chain. Therefore, by moving the engaging pin to the locking position, the closed position of the window body can be clearly confirmed, and the window body is not left in an incompletely closed state, and the window body can be reliably closed in a complete state. Since the window opening and closing system locks the slider's sliding with tension applied to the traction chain, the traction chain does not loosen, the window body can be closed airtight, and air flow can be prevented when the window body is closed. Since the window opening and closing system rotates the swivel lever in either direction while the slider's sliding is locked, and moves the engaging pin to a predetermined unlocking position along the outer periphery of the engaging cam to release the lock, the lock can be easily released from the locked state in which the slider's sliding is locked, and the window body can be easily opened.

[0026] The window opening and closing system includes a stopper that is removably installed at a predetermined position on the guideline and stops the slider from sliding in the vertical direction, and by adjusting the installation position of the stopper on the guideline, the distance the slider slides in the vertical direction from the bottom end of the guideline can be adjusted, and the angle of rotation of the free end of the window body downward from the upper frame can be adjusted.Since the angle of rotation of the free end of the window body downward from the upper frame can be adjusted by adjusting the installation position of the stopper on the guideline, the opening area of ​​the window body when open can be adjusted, and the volume of air flowing through the window body can be adjusted.

[0027] The window opening and closing system includes a fixing means that is attached to the slider and fixes the slider to a predetermined position on the guideline, and is capable of fixing the slider to the predetermined position on the guideline using the fixing means in the process of sliding the slider up and down on the guideline, and is capable of opening the window body with the free end of the window body pivoted downward from the upper frame at any angle.By fixing the slider at a predetermined position on the guideline using the fixing means, the window body can be opened with the free end of the window body pivoted downward from the upper frame at any angle, so that the opening area of ​​the window body when opened can be adjusted using the fixing means, and the volume of air flowing through the window body can be adjusted. [Brief description of the drawings]

[0028] [Figure 1] FIG. 2 is a front view of an example window opening and closing system. [Diagram 2] FIG. 1 is a top view of a window opening and closing system. [Diagram 3] FIG. 4 is a partially enlarged front view showing the window body in an open state. [Figure 4] FIG. 4 is a side view of an installation unit shown as an example. [Diagram 5] FIG. [Figure 6] FIG. [Figure 7] FIG. 4 is a partial enlarged view of the installation unit, showing an example of a locking mechanism. [Figure 8] A partially enlarged view of the erection unit, continued from Figure 7. [Figure 9] FIG. 4 is a partially enlarged top view of a drive unit showing an example of a rotation mechanism. [Figure 10] FIG. 10 is a partially enlarged top view of the drive unit continued from FIG. [Figure 11] FIG. 4 is a partially enlarged side view of the window opening and closing system with the window body closed. [Figure 12] FIG. 12 is an enlarged partial side view of the window opening and closing system similar to FIG. 11 shown in cross section. [Figure 13] FIG. 4 is a partially enlarged side view of the window opening and closing system with the window body in an open state. [Figure 14] FIG. 14 is an enlarged partial side view of the window opening and closing system similar to FIG. 13 shown in cross section. [Figure 15] FIG. 11 is a side view of an installation unit shown as another example. [Figure 16] FIG. 13 is a side view of the installation unit showing the slider abutting against the stopper. [Figure 17] An enlarged partial view of the installation unit showing the slider fixed at a designated location on the guideline by a locking screw. [Figure 18] 18 is a cross-sectional view taken along line AA in FIG. 17. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] The window opening and closing system according to the present invention will be described in detail below with reference to the attached drawings such as Fig. 1, which is a front view of a window opening and closing system 10 shown as an example. Fig. 2 is a top view of the window opening and closing system 10, and Fig. 3 is a partially enlarged front view showing the window body 13a in an open state. In Figs. 1 and 2, the up-down direction is indicated by arrow X, the lateral direction is indicated by arrow Y, and the front-rear direction is indicated by arrow Z. Fig. 1 illustrates two first and second window frames 12a, 12b and two first and second window bodies 13a, 13b, but there is no particular limitation on the number of window frames or window bodies, and there may be one window frame or window body, or there may be three or more window frames or window bodies.

[0030] The window opening / closing system 10 (smoke exhaust operator) is normally used for air exchange (for indoor ventilation) and is used as a smoke exhaust window for exhausting harmful smoke in an emergency (such as when a fire breaks out). The window opening / closing system 10 includes a first window frame 12a and a second window frame 12b, a first window body 13a (first shoji screen) installed in the first window frame 12a and a second window body 13b (second shoji screen) installed in the second window frame 12b, a first swivel chain 14a for swiveling the first window body 13a and a second swivel chain 14b for swiveling the second window body 13b, an installation unit 15 (chain box), a first drive unit 16a and a second drive unit 16b, and a chain operating means 17 for operating (releasing or winding) the swivel chains 14a and 14b.

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

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

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

[0034] The upper and lower frames 23, 24 and the first and second side frames 25a, 25b are formed into a substantially angled (L-shaped) shape. The upper frame 23 has an upper frame plate 26 located directly above the free ends 36 of the window bodies 13a, 13b and extending laterally, and an upper abutment plate 27 extending laterally perpendicular to the upper frame plate 26 and airtightly abutting against the rear surfaces of the free ends 36 of the window bodies 13a, 13b. The lower frame 24 has a lower frame plate 28 located directly below the rotating ends 35 of the window bodies 13a, 13b and extending laterally, and a lower abutment plate 29 extending laterally perpendicular to the lower frame plate 28 and airtightly abutting against the rear surfaces of the rotating ends 35 of the window bodies 13a, 13b.

[0035] The first side frame 25a has a first side frame plate 30 located to the side of the first side portion 37a of the window bodies 13a, 13b and extending in the vertical direction, and a first abutment plate 31 extending in the vertical direction perpendicular to the first side frame plate 30 and airtightly abutting against the rear surface of the first side portion 37a of the window bodies 13a, 13b. The second side frame 25b has a second side frame plate 32 located to the side of the second side portion 37b of the window bodies 13a, 13b and extending in the vertical direction, and a second abutment plate 33 extending in the vertical direction perpendicular to the second side frame plate 32 and airtightly abutting against the rear surface of the second side portion 37b of the window bodies 13a, 13b.

[0036] The first and second window frames 12a, 12b are made of resin sashes, aluminum sashes, or aluminum-resin composite sashes, and the window frames 12a, 12b are connected to the wall and to each other by existing connection means. An openable window fixture 34 is installed directly below the first and second window frames 12a, 12b (first and second window bodies 13a, 13b), in which glass (glass screen) is fitted into a window frame (resin sash, aluminum sash, or aluminum-resin composite sash). The window frames 12a, 12b and the window fixture 34 are connected by existing connection means. In some cases, a wall is installed directly below the first and second window frames 12a, 12b (first and second window bodies 13a, 13b).

[0037] The first and second window bodies 13a, 13b (paper screens) are rotatably attached to the first and second window frames 12a, 12b, and are horizontally long rectangular bodies of the same shape and size lined up horizontally. The first and second window bodies 13a, 13b rotate from a closed state (closed position) to an open state (fully open position), and also rotate from the open state to the closed state. There are no particular limitations on the size and shape of the first and second window bodies 13a, 13b, and the size and shape can be freely designed according to the size and shape of the first and second window frames 12a, 12b.

[0038] These window bodies 13a, 13b have rotating end portions 35 (rotating frames) rotatably connected (installed) to the lower frames 24 of the window frames 12a, 12b and extending straight in the horizontal direction, free end portions 36 (swivel frames) extending straight in the horizontal direction and spaced apart upward from the rotating end portions 35, and first side portions 37a (first side frame 37a) and second side portions 37b (second side frame 37b) extending straight in the up-down direction and spaced apart in the horizontal direction. A sliding door metal fitting 38 is installed and fixed in the horizontal center of the free end portions 36.

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

[0040] The first and second swivel chains 14a, 14b (roller chains) are made of metal such as steel, stainless steel, or titanium, with the tip of the first swivel chain 14a connected to a sliding door fitting 38 at the free end 36 of the first window body 13a, and the tip of the second swivel chain 14b connected to a sliding door fitting 38 at the free end 36 of the second window body 13b. The swivel chains 14a, 14b rotate the first and second window bodies 13a, 13b from a closed state to an open state, and also rotate the window bodies 13a, 13b from an open state to a closed state.

[0041] The first and second swivel chains 14a, 14b have linearity (straightness) to move in their axial direction (extending direction). At the initial movement (when the rotation starts) of rotating the first and second window bodies 13a, 13b from the closed state to the open state, the chains 14a, 14b exert a pushing force (kick-out force) that promotes (promotes) the rotation of the free ends 36 due to their linearity, and impart a rotation force to the free ends 36 of the window bodies 13a, 13b at the initial movement of rotating the window bodies 13a, 13b to the open state.

[0042] In the window opening and closing system 10, when the first and second swivel chains 14a, 14b are unwound in one direction (forward in the front-rear direction), the free ends 36 of the first and second window bodies 13a, 13b, which are in airtight contact with the upper frame 23, rotate vertically downward around the rotating ends 35, and the window bodies 13a, 13b rotate from a closed state (closed position) to an open state (fully open position) (see FIG. 13). The vertical downward rotation angle of the window bodies 13a, 13b varies depending on the unwound dimensions of the first and second swivel chains 14a, 14b, and the open area when the window bodies 13a, 13b are open can be adjusted by adjusting the unwound dimensions of the swivel chains 14a, 14b. In the window opening and closing system 10, when the first and second swivel chains 14a, 14b are pulled in the other direction (rearward in the front-to-rear direction), the free ends 36 of the first and second window bodies 13a, 13b, which have rotated downward in the vertical direction, rotate upward in the vertical direction around the rotating end portion 35, and the window bodies 13a, 13b rotate from the open state (fully open position) to the closed state (closed position) (see Figure 11).

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

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

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

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

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

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

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

[0050] In the first and second drive units 16a, 16b, the first to third plates 53-55 are integrally molded and have a U-shaped cross section. In the drive units 16a, 16b, first and second housing spaces 57a, 57b are defined which are long in the horizontal direction and surrounded by the first to third plates 53-55. In the first and second drive units 16a, 16b, the first plate 53 is connected and fixed to the upper frame 23 of the window frames 12a, 12b by a predetermined connecting means (brackets, bolts and nuts, rivets, welding, etc.).

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

[0052] The slider 19 is made of a metal such as aluminum, stainless steel, or other alloy, and is formed of an upper plate 61 shaped like a long plate in the vertical direction, and a lower plate 62 shaped like a long plate in the vertical direction and positioned below the upper plate 61. The slider 19 is disposed in an intermediate portion 59 (movement space) of the guideline 18, and by sliding in the vertical direction in the first chain accommodating space 43 (first guide recess), the slider 19 slides upward in the vertical direction in the intermediate portion 59 (vertical central area of ​​the installation unit 15) from the lower end 60 to the upper end 58 of the guideline 18, and also slides downward in the vertical direction in the intermediate portion 59 (vertical central area of ​​the installation unit 15) from the upper end 58 to the lower end 60 of the guideline 18.

[0053] One end 63 of the traction chain 21 is connected to the upper end of the upper plate 61. A first connecting part 64 extending in the front-rear direction perpendicular to the plate 61 is integrally formed with the lower end of the upper plate 61. A second connecting part 65 extending in the front-rear direction perpendicular to the plate 62 and facing the first connecting part 64 is integrally formed with the upper end of the lower plate 62. The first and second connecting parts 64, 65 are formed with screw holes 66 (screw holes) into which a screw part 68 of an adjustment screw 67 described later is screwed.

[0054] An adjustment screw 67 is provided on the first connecting portion 64 of the upper plate 61 and the second connecting portion 65 of the lower plate 62 to adjust the vertical separation dimension between these plates 61, 62. The adjustment screw 67 has a threaded portion 68 which is screwed into a screw hole 66 (screw hole) of the first and second connecting portions 64, 65. A nut is screwed into the threaded portion 68 of the adjustment screw 67.

[0055] For example, by rotating the adjustment screw 67 in a clockwise direction (forward direction), the first connecting portion 64 and the second connecting portion 65 gradually come closer to each other, thereby shortening the vertical separation dimension between the upper plate 61 and the lower plate 62, and by rotating the adjustment screw 67 in a counterclockwise direction (reverse direction), the first connecting portion 64 and the second connecting portion 65 gradually move apart, thereby lengthening the vertical separation dimension between the upper plate 61 and the lower plate 62.

[0056] Although not shown, a sliding top (not shown) may be fixed to the underside of the slider 19. In this case, the sliding top is slidably inserted (engaged) into the first chain accommodating space 43 (first guide recess) of the installation unit 15, and the slider 19 is disposed in the middle part 59 (movement space) of the guideline 18. As the sliding top slides up and down in the first chain accommodating space 43, the slider 19 slides up and down in the middle part 59 (the central area in the up and down direction of the installation unit 15) from the lower end 60 to the upper end 58 of the guideline 18, and the slider 19 slides down in the middle part 59 from the upper end 58 to the lower end 60 of the guideline 18.

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

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

[0059] The engagement cam 69 is disposed at the lower end 60 of the guide line 18 of the installation unit 15, and is connected (fixed) to the lower end 60 of the guide line 18 (the lower end of the first and second installation plates 39, 40 and the base plate 41 of the installation unit 15) by a predetermined connecting means (bolt, rivet, welding, etc.). The engagement cam 69 has an outer peripheral edge 72 that slopes downward in the vertical direction. The outer peripheral edge 72 may also be arcuate downward in the vertical direction.

[0060] The swivel lever 70 is installed at the lower end of the lower plate 62 of the slider 19, and is formed of a rotating base end 73 and a gripping portion 74 (handle). The rotating base end 73 is rotatably attached to the lower end of the lower plate 62. The gripping portion 74 of the swivel lever 70 rotates (rotates) around the rotating base end 73 in the rotation direction (front-rear direction) (clockwise or counterclockwise) of the window main body 13a. A rotating arm 75 is integrally formed (connected) on the side of the rotating base end 73 of the gripping portion 74 (handle) and extends laterally (outward) from the side edge of the rotating base end 73. The rotating arm 75 is formed with an engagement pin 76 that is convex toward the base plate 41 of the erection unit 15. The engagement pin 76 is engaged with the engagement cam 69 in a disengageable manner.

[0061] When the grip portion 74 (the swivel lever 70) of the swivel arm 75 is swung counterclockwise, the tip 77 of the swivel arm 74 abuts against the inner surface of the second installation plate 40 of the installation unit 15, and the grip portion 74 stops rotating further in the counterclockwise direction. By adjusting the lateral (outward) extension dimension of the swivel arm 75, the counterclockwise rotation range of the grip portion 74 (the swivel lever 70) can be adjusted. By adjusting the counterclockwise rotation range of the grip portion 74, it is possible to prevent the swivel arm 75 from rotating counterclockwise more than necessary, and the operability of the slider 19 by the swivel lever 70 can be improved.

[0062] The engagement pin 76 pivots (rotates) together with the pivot arm 75 in the pivot direction (front-rear direction) (clockwise or counterclockwise) of the window main body 13a in association with the pivot (rotation) of the grip 74 (the pivot lever 70). In the pivot lever 70, the engagement pin 76 slidably moves on the outer circumferential edge 72 of the engagement cam 69. When the grip 74 (the pivot lever 70) is pressed (pushed down) in the vertical direction and a pivot force is applied to the grip 74 (handle), the engagement pin 76 slides (gets over) the outer circumferential edge 72 of the engagement cam 69 in one direction and can slide (get over) the outer circumferential edge 72 of the engagement cam 69 in the other direction. The engagement pin 76 engages with the engagement cam 69 in a state in which it has moved (got over) the outer circumferential edge 72 of the engagement cam 69 in one direction.

[0063] In the window opening and closing system 10, the position of the engagement pin 76 relative to the outer periphery 72 of the engagement cam 69 is adjusted so that the engagement pin 76 can slide (ride over) the outer periphery 72 in one direction or the other. By rotating the adjustment screw 67 of the slider 19 counterclockwise (reverse direction) to increase the vertical separation dimension between the upper plate 61 and the lower plate 62, the tension acting on the traction chain 21 can be weakened while the engagement pin 76 of the swivel lever 70 can easily slide (ride over) the outer periphery 72 of the engagement cam 69 in one direction or the other. By rotating the adjustment screw 67 of the slider 19 clockwise (positive direction) to decrease the vertical separation dimension between the upper plate 61 and the lower plate 62, the tension acting on the traction chain 21 can be strengthened, but a force is required for the engagement pin 76 of the swivel lever 70 to slide (ride over) the outer periphery 72 of the engagement cam 69 in one direction or the other. By adjusting the vertical distance between the upper plate 61 and the lower plate 62, the tension acting on the traction chain 21 can be increased or decreased, thereby adjusting the degree of contact of the free end 36 with the upper abutment plate 27 when the first and second window bodies 13a, 13b are in the closed state, and adjusting the airtightness of the window opening and closing system 10 when in the closed state.

[0064] In the window opening and closing system 10, by using the adjustment screw 67 to adjust the vertical distance between the upper plate 61 and the lower plate 62, it is possible to apply optimal tension to the traction chain 21 when locking the sliding (up and down movement) of the slider 19, and to enable the engagement pin 76 of the swivel lever 70 to slide (climb over) the outer peripheral edge 72 of the engagement cam 69 in one direction or the other with an appropriate force.

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

[0066] When the slider 19 slides upward in the vertical direction through the intermediate portion 59 (the vertical central area of ​​the installation unit 15) from the lower end 60 to the upper end 58 of the guideline 18, one end 63 of the traction chain 21 moves upward in the vertical direction in conjunction with this, and the entire traction chain 21 operates in the vertical direction. When the slider 19 slides downward in the vertical direction through the intermediate portion 59 from the upper end 58 to the lower end of the guideline 18, one end 63 of the traction chain 21 moves downward in the vertical direction in conjunction with this, and the entire traction chain 21 operates in the vertical direction.

[0067] The first and second rotating mechanisms 22a and 22b are linked to the up and down movement of the traction chain 21 caused by the up and down sliding of the slider 19, and pay out the first and second swivel chains 14a and 14b in one direction (forward in the front-rear direction) and take up (wind) the swivel chains 14a and 14b in the other direction (rear in the front-rear direction). The first rotating mechanism 22a is formed of a first rod 79a, a sprocket 80, a first roller 81a, a first ring mounting drum 82a, and a first torsion spring 83a. The first rod 79a, the sprocket 80, the first roller 81a, the first ring mounting drum 82a, and the first torsion spring 83a are installed (housed) in the first housing space 57a of the first driving unit 16a.

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

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

[0070] The first rod 79a has one end and an intermediate portion rotatably supported by the bearing plate 56 of the first drive unit 16a. The second rod 79b has one end and an intermediate portion rotatably supported by the bearing plate 56 of the second drive unit 16b. The first and second rods 79a, 79b are connected at their other ends and integrated. Therefore, when one of the first and second rods 79a, 79b rotates clockwise (forward direction), the other also rotates clockwise (forward direction), and when one rotates counterclockwise (reverse direction), the other also rotates counterclockwise (reverse direction).

[0071] The sprocket 80 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 79a. The traction chain 21 engages with the teeth of the sprocket 80. The sprocket 80 rotates in a clockwise direction (forward direction) or counterclockwise direction (reverse direction) in accordance with the up and down movement of the traction chain 21, and transmits a rotational force to the first and second rods 79a, 79b.

[0072] The outer diameter of the sprocket 80 is adjustable. Under the condition that the peripheral speed of the sprocket 80 (speed of the slider 19) is the same, by increasing the outer diameter of the sprocket 80, the ratio of the diameter of the sprocket 80 to the diameters of the first and second rods 79a, 79b increases, and the force required to rotate the window bodies 13a, 13b upward in the vertical direction from the open state to the closed state (the force pushing the slider downward) is small, whereas the total number of rotations of the first and second rods 79a, 79b required to change the window bodies 13a, 13b from the open state to the closed state does not change, so that the vertical movement dimension of the slider 19 becomes longer by the amount of the increase in the outer diameter of the sprocket 80. Conversely, by reducing the outer diameter of the sprocket 80, the ratio of the diameter of the sprocket 80 to the diameter of the first and second rods 79a, 79b becomes smaller, and the force (force pushing the slider downward) required to rotate the window bodies 13a, 13b upward in the vertical direction from the open state to the closed state increases, but the vertical movement dimension of the slider 19 becomes shorter.

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

[0074] By reducing the outer diameter of the sprocket 80, the window opening and closing system 10 requires force to slide the slider 19 downward in the vertical direction, but it is possible to reduce the vertical movement dimension (sliding distance) of the slider 19 between the closed and open states of the first and second window bodies 13a, 13b, and it is possible to rotate the window bodies 13a, 13b from the closed state to the open state and to rotate the window bodies 13a, 13b from the open state to the closed state by simply sliding the slider 19 a short distance.

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

[0076] The first roller 81a rotates in a clockwise direction (forward direction) or counterclockwise direction (reverse direction) in accordance with the rotation of the first rod 79a, and the second roller 81b rotates in a clockwise direction (forward direction) or counterclockwise direction (reverse direction) in accordance with the rotation of the second rod 79b. The other end of the first revolving chain 14a is connected and fixed to the first roller 81a, and the other end of the second revolving chain 14b is connected and fixed to the second roller 81b.

[0077] When the sprocket 80 is viewed from the other end of the first rod 79a, the first roller 81a rotates in the counterclockwise direction, and the first revolving chain 14a is pulled by the first roller 81a in the other direction (rearward in the front-rear direction) as shown in FIG. 9. When the first roller 81a rotates in the clockwise direction, the first revolving chain 14a is unwound from the first roller 81a in one direction (forward in the front-rear direction) as shown in FIG. 10. When the sprocket 80 is viewed from the other end of the second rod 79b, the second roller 81b rotates in the clockwise direction, and the second revolving chain 14b is unwound by the second roller 81b in the other direction (rearward in the front-rear direction). When the second roller 81b rotates in the counterclockwise direction, the second revolving chain 14b is unwound from the second roller 81b in one direction (forward in the front-rear direction).

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

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

[0080] The first and second torsion springs 83a, 83b are made of hard steel wire, stainless steel wire, or spring phosphorus bronze. The first torsion spring 83a is attached to the first ring mounting drum 82a and extends in the axial direction of the first rod 79a. The second torsion spring 83b is attached to the second ring mounting drum 82b and extends in the axial direction of the second rod 79b. The arm shape of the torsion springs 83a, 83b can be a short hook, straight, one-stage bend, or the like. The outer diameter, inner diameter, and number of turns of the torsion springs 83a, 83b can be arbitrarily set according to the torque required to rotate the first and second window bodies 13a, 13b (paper screens) upward and downward (the auxiliary force required to slide the slider 19 downward in the vertical direction).

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

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

[0083] When the first and second rods 79a, 79b rotate clockwise and the first and second revolving chains 14a, 14b are unwound in one direction (forward in the front-rear direction) from the first and second rollers 81a, 81b, the first and second torsion springs 83a, 83b twist in the winding direction or twist in the direction opposite to the winding direction. When the first and second torsion springs 83a, 83b twist in the direction opposite to the winding direction, they exert a torque (repulsive force) in the opposite direction (winding direction) proportional to the twist angle, and when they twist in the winding direction, they exert a torque (repulsive force) in the opposite direction (opposite to the winding direction) proportional to the twist angle. In the window opening and closing system 10, the torque (outer diameter, inner diameter, number of turns, and restitution coefficient) of the first and second torsion springs 83a, 83b is adjusted so that the load acting on the slider 19 when the window bodies 13a, 13b are rotated from bottom to top in the vertical direction is approximately 1.5 to 2 kg.

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

[0085] An example of a procedure for opening the window bodies 13a, 13b by rotating the free ends 36 of the window bodies 13a, 13b downward in the vertical direction from a state in which the first and second window bodies 13a, 13b are closed is as follows. The window opening and closing system 10 is manually operated by a person who enters and leaves the building in which it is installed. In addition, when the first and second window bodies 13a, 13b are closed, the first and second rotating chains 14a, 14b are taken up (wound up) in the other direction (rearward in the front-rear direction) by the first and second rollers 81a, 81b, the free ends 36 of the window bodies 13a, 13b rotate to the closed position, the rotating ends 35 are airtightly attached to the lower frame 24, the first and second side parts 37a, 37b are airtightly attached to the first and second side frames 25a, 25b, and the free ends 36 are airtightly attached to the upper frame 23.

[0086] Furthermore, the slider 19 is positioned at the lower end 60 of the guideline 18, and the engagement pin 76 of the pivot lever 70 slides (rides over) the outer peripheral edge 72 of the engagement cam 69 in one direction to move the engagement pin 76 to the locked position, and the sliding (up and down movement) of the slider 19 is locked in a state in which tension is applied to the traction chain 21. In the state in which the sliding of the slider 19 is locked, the pivot lever 70 hangs downward from the lower end 60 of the guideline 18, as shown in FIG.

[0087] First, while holding the grip portion 74 (handle) of the swing lever 70, the swing lever 70 is pressed (pushed down) in the vertical direction and a swing force is applied to the grip portion 74 of the swing lever 70 in the counterclockwise direction (reverse direction). By applying a swing force to the grip portion 74, the swing arm 75 and the engagement pin 76 swing in the counterclockwise direction (reverse direction), and the engagement pin 76 slides (rides over) the outer circumferential edge 72 of the engagement cam 69 in the other direction, and the engagement pin 76 moves to the unlocked position, and the engagement between the engagement pin 76 and the engagement cam 69 is released. When the engagement pin 76 is moved to the unlocked position, the sliding (up and down movement) of the slider 19 is unlocked and the tension acting on the traction chain 21 is released.

[0088] When the grip part 74 of the swivel lever 70 is rotated counterclockwise, the swivel arm 75 also rotates counterclockwise (reverse direction), and as shown in Fig. 8, the tip 77 of the swivel arm 75 abuts against the inner surface of the second installation plate 40 of the installation unit 15. When the tip 77 of the swivel arm 75 abuts against the inner surface of the second installation plate 40, the counterclockwise rotation of the grip part 74 (swivel lever 70) stops at that point.

[0089] The extension dimension of the swivel arm 75 and the positional relationship between the engagement cam 69 and the engagement pin 76 are adjusted so that the lock is released when the swivel lever 70 (grip 74) is rotated 15 to 20 degrees counterclockwise (reverse direction) from the state in FIG. 7 in which it hangs down from the lower end 60 of the guideline 18. Furthermore, the extension dimension of the swivel arm 75 is adjusted so that the tip 77 of the swivel arm 75 abuts against the inner surface of the second installation plate 40 of the installation unit 15 when it is rotated 15 to 20 degrees counterclockwise (reverse direction).

[0090] Next, while holding the gripping portion 74 (grip) of the swivel lever 70, the slider 19 is slid (pushed up) together with the swivel lever 70 upward from the lower end 60 to the upper end 58 of the guide line 18. When the slider 19 is slid upward, the traction chain 21 located in the first chain housing portion 43 moves upward in conjunction with the sliding of the slider 19, and the sprocket 80 engaged with the traction chain 21 rotates clockwise. When the sprocket 80 rotates, the first and second rods 79a, 79b (rotation mechanisms 22a, 22b) rotate clockwise in conjunction with the rotation of the first and second rods 79a, 79b, and the first and second rollers 81a, 81b rotate clockwise in conjunction with the rotation of the first and second rods 79a, 79b. When the first and second rollers 81a, 81b rotate clockwise, the first and second revolving chains 14a, 14b are unwound in one direction (forward in the front-rear direction) from the first and second rollers 81a, 81b as shown in FIGS.

[0091] When the first and second window bodies 13a, 13b are initially rotated from a closed state to an open state (when rotation begins), the first and second swivel chains 14a, 14b are unwound in one direction (forward in the front-to-back direction) from the first and second rollers 81a, 81b, and due to the linear motion (straight-line movement) of the swivel chains 14a, 14b, they exert a pull-out force (kick-out force) that assists (promotes) the downward vertical rotation of the free ends 36 of the first and second window bodies 13a, 13b, and the free ends 36 of the first and second window bodies 13a, 13b are pushed (pushed out) forward in the front-to-back direction by the swivel chains 14a, 14b, applying a downward vertical rotation force to the free ends 36 of the window bodies 13a, 13b.

[0092] The first and second window bodies 13a, 13b rotate using the reeling force of the first and second swivel chains 14a, 14b at the initial movement when the free ends 36 of the window bodies 13a, 13b rotate from the closed position to the open position, and during the rotation process except for the initial movement, the free ends 36 of the window bodies 13a, 13b automatically rotate downward in the vertical direction around the rotating end 35 due to the weight of the window bodies 13a, 13b. As the free ends 36 of the first and second window bodies 13a, 13b automatically rotate downward in the vertical direction, the first and second swivel chains 14a, 14b are automatically reeled out in one direction (forward in the front-to-rear direction), the first and second rods 79a, 79b (rotation mechanisms 22a, 22b) automatically rotate clockwise, and the sprocket 80 automatically rotates clockwise. Furthermore, the traction chain 21 automatically operates upwardly, and the slider 19 automatically slides upwardly toward the upper end 58 of the guide line 18 .

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

[0094] When the first and second torsion springs 83a, 83b are twisted in the direction opposite to the winding direction or in the winding direction, the torsion springs 83a, 83b exert a torque in the opposite direction (the winding direction or the opposite direction to the winding direction) proportional to the twist angle, and the torque of the torsion springs 83a, 83b applies a rotational force to the free ends 36 of the first and second window bodies 13a, 13b to rotate them upward in the vertical direction from the open position to the closed position.

[0095] In the window opening and closing system 10, the slider 19 slides upward in the vertical direction at the middle portion 59 (the vertical central area of ​​the installation unit 15) from the lower end 60 of the guideline 18 toward the upper end 58 to operate the traction chain 21 (traction member) upward in the vertical direction, and the upward operation of the traction chain 21 rotates the sprocket 80 (rotation mechanisms 22a, 22b) to unwind the first and second swivel chains 14a, 14b from the first and second rollers 81a, 81b, thereby rotating the first and second window bodies 13a, 13b from a closed state to an open state. Therefore, the window bodies 13a, 13b can be rotated from a closed state to an open state simply by sliding the slider 19 upward and downward, and the first and second window bodies 13a, 13b can be smoothly rotated from a closed state to an open state without requiring much effort and time, and the window bodies 13a, 13b can be easily opened.

[0096] The window opening and closing system 10 rotates by utilizing the payout force (torque) of the first and second swivel chains 14a, 14b during the initial movement in which the free ends 36 of the first and second window bodies 13a, 13b rotate from the closed position to the open position, and during the rotation process except for the initial movement, the free ends 36 of the window bodies 13a, 13b automatically rotate downward in the vertical direction due to the weight of the window bodies 13a, 13b. Therefore, by utilizing the payout force of the first and second swivel chains 14a, 14b, the window bodies 13a, 13b can be reliably rotated during the initial movement in which the slider 19 is slid upward in the vertical direction, and the window bodies 13a, 13b can be smoothly rotated from the closed state to the open state by sliding the slider 19 upward, thereby easily opening the window bodies 13a, 13b. In the window opening and closing system 10, the free ends 36 of the window bodies 13a, 13b rotate due to the payout force (torque) of the first and second swivel chains 14a, 14b at the initial movement, and during the rotation process other than the initial movement, the free ends 36 of the window bodies 13a, 13b automatically rotate downward in the vertical direction due to the weight of the first and second window bodies 13a, 13b, so that in an emergency, the window bodies 13a, 13b can be opened in one go without the need to slide the slider 19.

[0097] The window opening and closing system 10 is unlocked by rotating the gripping portion 74 (rotating lever 70) counterclockwise (either forward or reverse) while the sliding of the slider 19 is locked, and moving the engagement pin 76 to an unlocked position where it has slid (overcome) the outer peripheral edge 72 of the engagement cam 69. Therefore, the lock can be easily released from the locked state in which the sliding of the slider 19 is locked, and the first and second window bodies 13a, 13b can be easily opened.

[0098] The window opening and closing system 10 is unlocked by rotating the grip portion 74 (rotation lever 70) 15 to 20 degrees from a state in which the sliding of the slider 19 is locked. Therefore, the lock can be released easily and quickly without having to rotate the grip portion 74 (rotation lever 70) significantly (for example, by 90 degrees) from a state in which the sliding of the slider 19 is locked.

[0099] An example of a procedure for rotating the free ends 36 of the window bodies 13a, 13b upward in the vertical direction to close the window bodies 13a, 13b from an open state is as follows: With the grip portion 74 (handle) of the rotation lever 70 being gripped, the slider 19 is slid (pushed down) downward in the vertical direction together with the rotation lever 70 from the upper end 58 to the lower end 60 of the guide line 18. Note that the load (kg) acting on the slider 19 when rotating the window bodies 13a, 13b from the lower to the upper direction is adjusted to about 1.5 to 2 kg by the torque (repulsive force) of the first and second torsion springs 83a, 83b.

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

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

[0102] By sliding (pushing down) the slider 19 to the lower end 60 of the guideline 18, the first and second window bodies 13a, 13b are rotated from an open state to a closed state. When the first and second window bodies 13a, 13b are closed, the torsion of the first and second torsion springs 83a, 83b is released and the torque of those torsion springs 83a, 83b becomes zero. After sliding the slider 19 to the lower end 60 of the guideline 18, while holding the grip portion 74 of the turning lever 70, a turning force is applied to the grip portion 74 in the clockwise direction (positive direction) while pressing (pushing down) the turning lever 70 in the vertical direction.

[0103] By applying a turning force to the gripping portion 74 and turning the turning lever 70 clockwise (positive direction) by 15 to 20 degrees, the engagement pin 76 turns clockwise (positive direction) and slides (rides over) the outer peripheral edge 72 of the engagement cam 69 in one direction, the engagement pin 76 moves to the lock position, and the engagement pin 76 engages with the engagement cam 69. When the engagement pin 76 is moved to the lock position, the turning lever 70 hangs down from the lower end 60 of the guide line 18, tension is applied to the traction chain 21, and the sliding (up and down movement) of the slider 19 is locked. When the engagement pin 76 moves to the locked position and tension is applied to the traction chain 21, the rotating end 35 is hermetically sealed to the lower frame 24, the first and second side portions 37a, 37b are hermetically sealed to the first and second side frames 25a, 25b, and the free end 36 is hermetically sealed to the upper frame 23.

[0104] In the window opening and closing system 10, the slider 19 is slid downward from the upper end 58 of the guideline 18 to operate the traction chain 21 (traction member) downward in the vertical direction, and the downward operation of the traction chain 21 rotates the sprocket 80 (rotation mechanisms 22a, 22b) to wind the first and second swivel chains 14a, 14b around the first and second rollers 81a, 81b, and rotates the first and second window bodies 13a, 13b from the open state to the closed state. Therefore, by simply sliding the slider 19 downward in the vertical direction, the window bodies 13a, 13b can be rotated from the open state to the closed state, and the first and second window bodies 13a, 13b can be smoothly rotated from the open state to the closed state without requiring much effort and time, and the window bodies can be easily closed. When closing the open window bodies 13a, 13b of the window opening and closing system 10, it is not necessary to rotate the winding handle multiple times as in the conventional technology, but it is only necessary to slide the slider 19 downward in the vertical direction, and the open window bodies 13a, 13b can be closed in a short time by a simple sliding operation.

[0105] The window opening and closing system 10 rotates the gripping portion 74 of the swivel lever 70 clockwise (positive direction) at the lower end 60 of the guideline 18, moving the engagement pin 76 of the swivel lever 70 to a locking position where it has slid (overridden) the outer peripheral edge 72 of the engagement cam 69, thereby locking the sliding (up and down movement) of the slider 19 while applying tension to the traction chain 21. Therefore, by moving the engagement pin 76 to the locking position, the closed positions of the first and second window bodies 13a, 13b can be clearly confirmed, and the window bodies 13a, 13b will not be left in an incompletely closed state, and the window bodies 13a, 13b can be reliably and airtightly closed in a complete state.

[0106] Since the window opening / closing system 10 locks the sliding of the slider 19 with tension applied to the traction chain 21, the traction chain 21 does not loosen, the first and second window bodies 13a, 13b can be closed airtight, and air flow can be prevented when the window bodies 13a, 13b are closed. Since the window opening / closing system 10 can lock the sliding of the slider 19 by turning the gripping part 74 of the turning lever 70 by 15 to 20 degrees from the unlocked state of the slider 19, the sliding of the slider 70 can be easily and quickly locked without turning the gripping part 74 of the turning lever 70 by a large amount (for example, by 90 degrees) from the unlocked state of the slider 19.

[0107] When closing the first and second window bodies 13a, 13b in an open state without utilizing the first and second torsion springs 83a, 83b, a considerable force is required to slide the slider 19 downward in the vertical direction due to the weight of the window bodies 13a, 13b. However, in the window opening and closing system 10, the torque (repulsive force) of the torsion springs 83a, 83b promotes winding of the first and second swivel chains 14a, 14b around the first and second rollers 81a, 81b, and the window bodies 13a, 13b are closed smoothly. The torque of these torsion springs 83a, 83b is adjusted so that the load acting on the slider 19 when the slider 19 is rotated from below to above in the vertical direction is approximately 1.5 to 2 kg. Therefore, by utilizing these torsion springs 83a, 83b, the slider 19 can be easily slid downward in the vertical direction without the need for a large amount of force, and the first and second window bodies 13a, 13b can be smoothly rotated from an open state to a closed state, making it easy to close the window bodies 13a, 13b.

[0108] Fig. 15 is a side view of the installation unit 15 shown as another example, and Fig. 16 is a side view of the installation unit 15 shown in a state where the slider 19 is in contact with the stopper 84. Fig. 17 is a partially enlarged view of the installation unit 15 showing a state where the slider 19 is fixed to a predetermined position of the guide line 18 by a set screw 85, and Fig. 18 is a cross-sectional view taken along line AA in Fig. 17. The installation unit 15 shown in Figs. 15 to 18 differs from that in Fig. 4 in that a stopper 84 is provided at a predetermined position of the guide line 18 of the installation unit 15, and that a set screw 85 (fixing means) is provided on the slider 19.

[0109] Other configurations of the window opening and closing system 11 equipped with the installation unit 15 in Figures 15 to 18 are the same as those of the window opening and closing system 10 in Figure 1, so the explanation of Figure 1 will be referred to for other configurations of the window opening and closing system 11. Note that the configuration of the installation unit 15 is the same as that in Figure 4, so the explanation of Figure 4 will be referred to and the same reference numerals as in Figure 4 will be used, and explanation of the configuration of the installation unit 15 will be omitted.

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

[0111] The installation position of the stopper 84 in the intermediate portion 59 (movement space) of the guide line 18 can be determined arbitrarily. By adjusting the installation position of the stopper 84 in the intermediate portion 59 of the guide line 18, the vertical movement distance (slide distance) of the slider 19 on the guide line 18 can be adjusted, and the vertical downward rotation angle (opening area) of the first and second window bodies 13a, 13b can be adjusted.

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

[0113] When the slider 19 abuts against the stopper 84 and the reeling out of the reel chains 14a, 14b stops, the free ends 36 of the first and second window bodies 13a, 13b stop reeling downward in the vertical direction. Depending on the installation position of the stopper 84 in the intermediate portion 59 (movement space) of the guide line 18, the angle of reeling downward in the vertical direction of the first and second window bodies 13a, 13b varies, and the open area of ​​the window bodies 13a, 13b when open varies.

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

[0115] To use the set screw 85, while holding the swivel lever 70, the slider 19 is gradually slid upwards together with the swivel lever 70 from the lower end 60 to the upper end 58 of the guideline 18, and the slider 19 is stopped from sliding at a predetermined point on the guideline 18. When the slider 18 is stopped from sliding, the operating part 86 of the set screw 85 is rotated counterclockwise (reverse direction) to move the screw part 87 back so as to move it away from the connecting plate 52 (base plate 41) of the installation unit 15. When the screw part 87 is moved back, the tapered part of the slide stop roller 88 attached to the screw part 87 presses against the protrusions that protrude inward from the inner surfaces of the second and third guide plates 47, 49, and the slider 19 is fixed to the installation unit 15 at that point. By fixing the slider 19 to the installation unit 15, the slider 19 is prevented from sliding further upward, and the payout of the first and second swivel chains 14a, 14b in one direction (forward in the front-rear direction) is stopped.

[0116] When the tapered portion of the slide stop roller 88 of the set screw 85 presses against the protrusions on the inner surfaces of the second and third guide plates 47, 49 and the payout of the swivel chains 14a, 14b stops, the vertical downward swivel of the free ends 36 of the first and second window bodies 13a, 13b stops. Depending on the fixed position of the slider 19 on the guide line 18 using the set screw 85, the vertical downward swivel angle of the first and second window bodies 13a, 13b varies, and the open area of ​​the window bodies 13a, 13b when open varies.

[0117] To release the slider 19 after it has been fixed to the connecting plate 52 by the set screw 85, the operation portion 86 of the set screw 85 is rotated clockwise (positive direction) to advance the screw portion 87 toward the connecting plate 52 (base plate 41). When the screw portion 87 is advanced, the tapered portion of the slide stop roller 88 separates from the protrusions on the inner surfaces of the second and third guide plates 47, 49, and the pressure applied by the tapered portion of the slide stop roller 88 against the protrusions on the inner surfaces of the second and third guide plates 47, 49 is released, the slider 19 is released from the fixed state, and the slider 19 can slide up and down.

[0118] The window opening and closing system 11 is capable of adjusting the upward movement distance (sliding distance) of the slider 19 from the lower end 60 of the guideline 18 by adjusting the installation position of the stopper 84 on the guideline 18, and can adjust the downward rotation angle of the free ends 36 of the first and second window bodies 13a, 13b from the upper frame 23.Therefore, the stopper 84 can adjust the opening area of ​​the window bodies 13a, 13b when opened, and can adjust the volume of air flowing through the window bodies 13a, 13b.

[0119] The window opening and closing system 11 uses a set screw 85 (fixing means) to fix the slider 19 at a predetermined location on the guideline 18, thereby making it possible to open the window bodies 13a, 13b with the free ends 36 of the window bodies 13a, 13b rotated downward at any angle from the upper frame 23.Therefore, the set screw 85 can be used to adjust the opening area of ​​the window bodies 13a, 13b when open, and the amount of air flowing through the window bodies 13a, 13b can be adjusted. [Explanation of symbols]

[0120] 10 Window opening and closing system 11 Window opening and closing system 12a First window frame 12b Second window frame 13a 1st window body (1st shoji screen) 13b Second window body (second shoji screen) 14a 1st swivel chain 14b 2nd swivel chain 15 Installation unit 16a First drive unit 16b Second drive unit 17 Chain operating means 18 Guidelines 19 Slider 20 Locking mechanism 21 Traction chain (traction member) 22a First rotating mechanism 22b Second rotation mechanism 23 Upper Frame 24 Lower Frame 25a First side frame 25b Second side frame 26 Upper frame plate 27 Upper abutment plate 28 Lower frame plate 29 Lower abutment plate 30 First side frame plate 31 First contact plate 32 Second side frame plate 33 Second abutment plate 34 Window installation 35 Rotating end (rotating frame) 36 Free end (swivel frame) 37a First side portion (first side frame) 37b Second side (second side frame) 38 Shoji metal fittings 39 First Installation Plate 40 Second installation plate 41 Base Plate 42 Cover plate 43 First chain storage space (first guide recess) 44 Second chain storage space (second guide recess) 45 Storage Space 46 First guide plate 47 Second guide plate 48 First guide base plate 49 3rd guide plate 50 4th guide plate 51 Second guide base plate 52 Connecting plate 53 Plate 1 54 Second Plate 55 3rd Plate 56 Bearing plate 57a Storage Space No. 1 57b Second Storage Space 58 Top 59 Middle section (movement space) 60 bottom end 61 Upper Plate 62 Lower Plate 63 One end 64 1st connection part 65 2nd connection part 66 Screw hole (screw hole) 67 Adjustment screw 68 Screw part 69 Engagement Cam 70 Swivel lever (swivel handle) 72 Outer rim 73 Rotating base end 74 Handle 75 Swivel Arm 76 Engagement pin 77 Tip 78 Other end (free end) 79a First Rod 79b 2nd Rod 80 Sprocket 81a 1st Roller 81b 2nd Roller 82a 1st ring mounting drum 82b Second ring mounting drum 83a 1st torsion spring 83b 2nd torsion spring 84 Stopper 85 Set screw (fixing means) 86 Control section 87 Threaded part 88 Slide stop roller

Claims

1. A window opening and closing system comprising: a window body whose free end rotates in a vertical direction around a rotating end rotatably installed on a window frame; a swivel chain connected to the free end of the window body for rotating the window body from a closed state to an open state and from the open state to the closed state; and a chain operating means for paying out the swivel chain in one direction to rotate the window body from the closed state to the open state and for pulling the swivel chain in the other direction to rotate the window body from the open state to the closed state, the chain operating means is formed of a guideline located below the window frame and extending in the vertical direction, a slider that slides in the vertical direction along the guideline, a pulling member that is connected to the slider and moves up and down as the slider slides in the vertical direction, and a rotation mechanism that rotates in conjunction with the up and down movement of the pulling member, winding up the swivel chain and letting out the swivel chain, The window opening and closing system is characterized in that the slider is slid vertically on the guideline to operate the pulling member vertically, and the rotating mechanism is rotated while the swivel chain is unwound in one direction to rotate the window body from a closed state to an open state, or the rotating mechanism is rotated while the swivel chain is pulled in the other direction to rotate the window body from an open state to a closed state.

2. The window opening and closing system according to claim 1, wherein the window opening and closing system slides the slider upward in the vertical direction from the lower end of the guideline to operate the pulling member upward in the vertical direction, rotates the rotating mechanism while reeling out the swivel chain in one direction to rotate the window body from a closed state to an open state, slides the slider downward in the vertical direction from the upper end of the guideline to operate the pulling member downward in the vertical direction, and rotates the rotating mechanism while pulling the swivel chain in the other direction to rotate the window body from an open state to a closed state.

3. 3. A window opening and closing system according to claim 1, wherein the window frame is formed of upper and lower frames extending laterally and spaced apart in the vertical direction, and first and second side frames extending vertically and spaced apart in the horizontal direction, the window body has the rotating end portion rotatably connected to the lower frame and hermetically sealed to the lower frame in the closed state, and the free end portion swivels to a closed position in which it hermetically seals with the upper frame in a closing operation and swivels to an open position vertically downward in an opening operation, the swivel chain exerts a payout force by its linearity to promote the rotation of the free end portion at the initial movement of rotating the window body from the closed state to the open state, and the window opening and closing system uses the payout force of the swivel chain to turn the free end portion of the window body at the initial movement of turning from the closed position to the open position, and during the turning process except for the initial movement, the free end portion of the window body automatically turns vertically downward due to its own weight.

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

5. The window opening and closing system according to claim 4, wherein the rotation mechanism includes a torsion spring that is installed on the other side of the rod and that exerts a torque in the opposite direction proportional to the angle of twist when twisted in the winding direction or the opposite direction to the winding direction, and when the rod rotates in the direction to pay out the swivel chain, the torsion spring twists in the winding direction or the opposite direction to the winding direction, the torsion spring exerts a torque in the direction pulling the swivel chain, and the torque of the torsion spring helps wind the swivel chain around the roller.

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

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

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

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

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

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

Images