Window opening and closing system

Abstract

To provide a window opening / closing system configured to easily open a window body by smoothly turning the window body from a closed state to an open state without requiring time and effort, and to easily close the window body by smoothly turning the window body from the open state to the closed state.SOLUTION: A window opening / closing system 10 is configured to: slide a slider 19 from a lower end of a guideline 18 upward in a vertical direction to move a traction chain upward in the vertical direction: rotate first and second rollers by rotation of a sprocket engaged with the traction chain to pay out first and second turning chains in one direction; turn window bodies 13a, 13b from a closed state to an open state; slide the slider 19 from an upper end of the guideline 18 downward in the vertical direction to move the traction chain downward in the vertical direction; rotate the first and second rollers by rotation of the sprocket; and pull the first and second turning chains in another direction to turn the window bodies 13a, 13b from the open state to the closed state.SELECTED DRAWING: Figure 1

Description

Technical Field

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[0001] The present invention relates to a window opening / closing system, and more particularly to a window opening / closing system suitably used for a smoke exhaust window.

Background Art

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

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The window opening and closing device disclosed in Patent Document 1 requires the operator to rotate a winding handle in the direction of winding up the wire when closing an open sash (window body). This operation requires rotating the winding handle multiple times, making the closing process cumbersome for the operator and requiring time and effort to close an open sash. Furthermore, if the winding handle is installed at a distance from the window, making it difficult to determine the window's open or closed state while operating the handle, it can be difficult to determine how far the handle needs to be rotated to close the sash. This can lead to the operator stopping the handle rotation midway through the closing process, resulting in the sash being left in an incompletely closed state.

[0005] The object of the present invention is to provide a window opening and closing system that allows the window body to be smoothly rotated from a closed state to an open state without requiring time and effort, and to be easily opened, and to be easily closed 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 allows the closed position of the window body to be clearly confirmed, prevents the window body from being left in an incompletely closed state, and ensures that the window body is reliably closed in a complete state. [Means for solving the problem]

[0006] The premise of the present invention to solve the above problems is a window body in which a free end pivots vertically around a rotating end rotatably installed on a window frame, and a mechanism connected to the free end of the window body that pivots the window body from a closed state to an open state. And, This window opening and closing system includes a pivoting chain that rotates the window from an open state to a closed state, and a chain actuation mechanism that extends the pivoting chain in one direction to rotate the window body from a closed state to an open state, and pulls the pivoting chain in the other direction to rotate the window body from an open state to a closed state.

[0007] The features of the present invention under the above premise are that the chain operating means includes a guideline located below the window frame and extending vertically, a slider that slides vertically along the guideline, and the slider One endThey are linked and move up and down in conjunction with the vertical sliding of the slider. Towing chain and towing chain A rotating mechanism that rotates as it moves up and down, winding up and unwinding the swivel chain, and The slider is slid downwards in the vertical direction, and when the slider is positioned at the lower end of the guideline, a locking mechanism is used to apply tension to the tow chain and lock the slider in place. Formed from, The locking mechanism is formed from an engaging cam formed at the lower end of the guideline and a pivot lever rotatably mounted at the lower end of the slider, having an engaging pin at its pivot base located at the lower end of the slider, the engaging pin moving along the outer edge of the engaging cam. The window opening and closing system works as follows: After moving the slider to the lower end of the guideline, the swivel lever is rotated in either the forward or reverse direction to move the engagement pin along the outer edge of the engagement cam to a predetermined locked position, thereby applying tension to the towing chain and locking the slider's slide. With the slider's slide locked, the swivel lever is rotated in either the forward or reverse direction to move the engagement pin along the outer edge of the engagement cam to a predetermined unlocked position, thereby allowing the slider to slide along the guideline. The window opening and closing system involves sliding the slider up and down along the guidelines. Towing chain The mechanism operates vertically, rotating the rotating mechanism and extending the swivel chain in one direction to rotate the window body from a closed state to an open state, or rotating the rotating mechanism and 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, the window opening and closing system slides the slider upward in the vertical direction from the lower end of the guideline. Towing chain The mechanism is operated upward in the vertical direction, and while rotating the rotating mechanism, the swivel chain is extended in one direction to rotate the window body from the closed state to the open state, and the slider is slid downward in the vertical direction from the upper end of the guideline. Towing chain The mechanism is operated downwards in the vertical direction, and while rotating the rotating mechanism, the swivel chain is pulled in the opposite direction, causing the window body to swivel from the open position to the closed position.

[0009] Another example of the present invention is a window frame formed from an upper frame and a lower frame that are spaced apart in the vertical direction and extend horizontally, and first and second lateral frames that are spaced apart in the horizontal direction and extend vertically, and a window body having a rotating end that is rotatably connected to the lower frame and airtightly adheres to the lower frame in the closed state, and a free end that rotates to a closed position airtightly adheres to the upper frame during the closing operation and rotates to an open position downward in the vertical direction during the opening operation, and a swivel chain exerts an outward force that facilitates the rotation of the free end by its linearity at the initial movement of rotating the window body from the closed state to the open state, and the window opening and closing system rotates the free end of the window body using the outward force of the swivel chain at the initial movement of rotating from the closed position to the open position, and during the rotation process except at the initial movement, the free end of the window body automatically rotates downward in the vertical direction by the weight of the window body.

[0010] Another example of the present invention is a rotating mechanism comprising a rod rotatably mounted on a window frame and extending laterally, a sprocket formed on one end of the rod with which a towing chain engages and which rotates in conjunction with the up-and-down movement of the towing chain, and a roller formed on the other end of the rod with which a swivel chain is connected and which unwinds and rewinds the swivel chain in conjunction with the rotation of the sprocket.

[0011] Another example of the present invention includes a rotating mechanism installed on the other side of the rod, which, when twisted in the winding direction or the opposite direction, generates torque in the opposite direction proportional to the angle of twist, and the window opening and closing system, in which the torsion spring twists in the winding direction or the opposite direction when the rod rotates in the direction of paying out the swivel chain, the torsion spring generates torque in the direction of pulling the swivel chain, and the torque of the torsion spring facilitates the winding of the swivel chain onto the roller.

[0012] Another example of the present invention is a window opening and closing system which includes a support unit extending downward from either a first lateral frame or a second lateral frame forming a window frame, wherein a guideline is formed on the support unit, located below the window frame and extending vertically.

[0013] Another example of the present invention is a mounting unit formed from a first guide plate and a second guide plate that face each other and extend vertically, and a base plate that is located between the first and second guide plates and extends vertically, wherein a first chain storage space for housing a towing chain so as to be vertically movable is formed on the side of the first guide plate and extends vertically, and a second chain storage space for housing a towing chain so as to be vertically movable is formed on the side of the second guide plate and extends vertically.

[0014] Another example of the present invention is a window opening and closing system that includes a stopper which is detachably installed at a predetermined location on the guideline to stop the vertical sliding of the slider, 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 by adjusting the installation position of the stopper on the guideline, and is capable of adjusting the downward pivot angle from the upper frame of the free end of the window body.

[0015] Another example of the present invention is a window opening and closing system which includes fixing means installed on a slider to fix the slider to a predetermined location on a guideline, wherein the window opening and closing system can use the fixing means to fix the slider to a predetermined location on the guideline during 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 swung downward from the upper frame at any angle. [Effects of the Invention]

[0016] According to the window opening and closing system of the present invention, the slider is slid up and down along the guideline to operate the traction member up and down, which rotates the rotation mechanism and extends the swivel chain in one direction, thereby rotating the window body from a closed state to an open state. Therefore, the window body can be rotated from a closed state to an open state simply by sliding the slider up and down, requiring no effort or time, and the window body can be smoothly rotated from a closed state to an open state, allowing the window body to be easily opened. The window opening and closing system rotates the window body from an open state to a closed state by sliding the slider up and down along the guideline to operate the traction member up and down, which rotates the rotation mechanism and pulls the swivel chain in the other direction. Therefore, the window body can be rotated from an open state to a closed state simply by sliding the slider up and down, requiring no effort or time, and the window body can be smoothly rotated from an open state to a closed state, allowing the window body to be easily closed. The window opening and closing system eliminates the need to repeatedly rotate the winding handle as in conventional technology when closing an open window. Instead, it simply requires sliding a slider up and down, allowing the open window to be closed quickly with a simple sliding operation.

[0017] A window opening and closing system in which the window body is rotated from a closed state to an open state by sliding the slider upward in the vertical direction from the lower end of the guideline to activate the traction member upward in the vertical direction, rotating the rotation mechanism and paying out the swivel chain in one direction, and sliding the slider downward in the vertical direction from the upper end of the guideline to activate the traction member downward in the vertical direction, rotating the rotation mechanism and pulling the swivel chain in the other direction, allows the window body to be rotated from a closed state to an open state simply by sliding the slider upward in the vertical direction, requiring no effort or time, and allowing the window body to be smoothly rotated from a closed state to an open state and easily opened, and also allows the window body to be smoothly rotated from an open state to an open state and easily closed by sliding the slider downward in the vertical direction, requiring no effort or time, and allowing the window body to be smoothly rotated from an open state to an open state and easily closed. The window opening and closing system eliminates the need to repeatedly rotate the winding handle as in conventional technology when closing an open window. Instead, it simply requires sliding the slider downwards, allowing the open window to be closed quickly with a simple sliding operation.

[0018] In a window opening and closing system in which the window frame is formed from an upper frame, a lower frame, and first and second lateral frames, and the window body has a rotating end rotatably connected to the lower frame and a free end that pivots to an open position downward in the vertical direction, the pivot chain exerts a payout force that facilitates the pivoting of the free end due to its linear motion at the initial movement of pivoting the window body from a closed state to an open state, the free end of the window body pivots using the payout force of the pivot chain at the initial movement of pivoting, and in the pivoting process except at the initial movement, the free end of the window body automatically pivots downward in the vertical direction due to the weight of the window body, the window body can be reliably pivoted when the slider is slid in the vertical direction (upward in the vertical direction), and the window body can be smoothly pivoted from a closed state to an open state without requiring time or effort by sliding the slider in the vertical direction (upward in the vertical direction), and the window body can be easily opened. The window opening and closing system allows the free end of the window to automatically rotate downwards in the vertical direction due to the weight of the window itself during the rotation process, except during the initial movement. Therefore, in an emergency, the window can be opened all at once without the need to slide a slider.

[0019] The traction member is a traction chain with one end connected to the slider and moving up and down as the slider slides in the vertical direction. The rotation mechanism is rotatably installed on the window frame and consists of a rod extending horizontally, a sprocket that rotates as the traction chain moves up and down, and a roller that pays out the swivel chain as the sprocket rotates and winds up the swivel chain. The window opening and closing system operates by sliding the slider in the vertical direction (upward in the vertical direction) along the guide line to activate the traction chain in the vertical direction. The upward and downward movement of the traction chain rotates the sprocket, paying out the swivel chain from the roller and rotating the window body from the closed state to the open state. Therefore, the window body can be rotated from the closed state to the open state by simply sliding the slider in the vertical direction (upward in the vertical direction), without the need for labor and time, and the window body can be smoothly rotated from the closed state to the open state, making it easy to open the window body. Also, by operating the traction chain in the vertical direction (downward in the vertical direction), the sprocket is rotated to wind up the swivel chain on the roller, and the window body is rotated from the open state to the closed state. Therefore, the window body can be rotated from the open state to the closed state by simply sliding the slider in the vertical direction (downward in the vertical direction), without the need for labor and time, and the window body can be smoothly rotated from the open state to the closed state, making it easy to close the window body.

[0020] In a window opening and closing system that includes a torsion spring that generates torque in the opposite direction proportional to the angle of twist of the rotating mechanism, when the rod rotates in the direction that pays out the swivel chain, the torsion spring twists in the winding direction or the opposite direction, generating torque in the direction that pulls the swivel chain (winding direction), and the winding of the swivel chain onto the roller is facilitated by the torque of the torsion spring, when closing the window body from the open state, force is required to slide the slider downward or upward due to the weight of the window body, but since the winding of the swivel chain onto the roller is facilitated by the torque of the torsion spring, by using the torsion spring, the slider can be slid downward or upward without requiring a large force, and the window body can be smoothly rotated from the open state to the closed state and the window body can be easily closed.

[0021] A window opening and closing system includes a temporary support unit extending downward from either a first lateral frame or a second lateral frame forming a window frame, with a guideline formed on the temporary support unit and located below the window frame and extending vertically. By forming the guideline on the temporary support unit so that it extends vertically from below the window frame, the slider is positioned in a location where force can be easily applied to it, the slider can be easily slid upward or downward in the vertical direction, the window body can be smoothly rotated from a closed state to an open state to easily open the window body, and the window body can be smoothly rotated from an open state to a closed state to easily close the window body.

[0022] The window opening and closing system is formed by a first guide plate and a second guide plate that extend vertically facing each other and a base plate that is located between the first and second guide plates and extends vertically. A first chain accommodation space for accommodating the traction chain to move vertically is formed on the side of the first guide plate and extends vertically, and a second chain accommodation space for accommodating the traction chain to move vertically is formed on the side of the second guide plate and extends vertically. When the traction chain is vertically accommodated in the first and second chain accommodation spaces, the slider is slid vertically (vertically upward from the lower end of the guide line of the slider) on the guide line to operate the traction chain vertically in the first and second chain accommodation spaces. By the operation of the traction chain, the sprocket is rotated to pay out the swivel chain from the roller, and the window body is swiveled from the closed state to the open state. Therefore, the window body can be swiveled from the closed state to the open state only by sliding the slider vertically (vertically upward), without requiring labor and time, and the window body can be smoothly swiveled from the closed state to the open state to easily open the window body. The window opening and closing system slides the slider vertically (vertically downward from the upper end of the guide line of the slider) on the guide line to operate the traction chain vertically in the first and second chain accommodation spaces. By the operation of the traction chain, the sprocket is rotated to wind up the swivel chain on the roller, and the window body is swiveled from the open state to the closed state. Therefore, the window body can be swiveled from the open state to the closed state only by sliding the slider vertically (vertically downward), without requiring labor and time, and the window body can be smoothly swiveled from the open state to the closed state to easily close the window body.

[0023] A window opening and closing system that includes a locking mechanism that applies tension to the towing chain and locks the slider's slide when the slider is slid downward in the vertical direction and the slider is positioned at the lower end of the guideline, allows for clear confirmation of the closed position of the window body by locking the slider's slide (vertical movement) with the locking mechanism, preventing the window body from being left in an incompletely closed state and ensuring that the window body is closed completely and reliably. Because the window opening and closing system locks the slider's slide while tension is applied to the towing chain, the towing chain will not loosen, allowing the window body to be closed airtightly and preventing airflow when the window body is closed.

[0024] The locking mechanism consists of an engagement cam formed at the lower end of the guideline and a pivot lever rotatably mounted at the lower end of the slider, with an engagement pin at its pivot base located at the lower end of the slider, the engagement pin moving along the outer edge of the engagement cam. After moving the slider to the lower end of the guideline, the pivot lever is rotated in either the forward or reverse direction to move the engagement pin along the outer edge of the engagement cam to a predetermined locking position, thereby locking the slider slide while tension is applied to the towing chain. With the slider slide locked, the pivot lever is rotated in either the forward or reverse direction to move the engagement pin... The window opening and closing system, which allows the slider to slide along the guideline by moving it to a predetermined unlocked position along the outer edge of the engagement cam, allows the user to clearly confirm the closed position of the window body by moving the swivel lever in either the forward or reverse direction at the lower end of the guideline, moving the engagement pin along the outer edge of the engagement cam to a predetermined locked position, thereby applying tension to the traction chain and locking the slider's slide (up and down movement). This ensures that the window body is not left in an incompletely closed state and can be reliably closed completely. The window opening and closing system locks the slider's slide while tension is applied to the traction chain, preventing the traction chain from loosening and allowing the window body to be closed airtightly, preventing airflow when the window body is closed. The window opening and closing system allows the lock to be released by rotating the swivel lever in either the forward or reverse direction while the slider's slide is locked, moving the engagement pin along the outer edge of the engagement cam to a predetermined unlocked position. This allows the user to easily release the lock from the locked state of the slider's slide and easily open the window body.

[0025] A window opening and closing system that includes a stopper that is detachably installed at a designated location on the guideline to stop the slider from sliding up and down, and by adjusting the installation position of the stopper on the guideline, the vertical sliding distance of the slider from the lower end of the guideline can be adjusted, and the downward pivot angle from the upper frame of the free end of the window body can be adjusted, thereby adjusting the opening area of ​​the window body when open and adjusting the airflow rate through the window body.

[0026] A window opening and closing system that includes fixing means installed on the slider to fix the slider to a predetermined location on the guideline, and in the process of sliding the slider up and down on the guideline, the fixing means can be used to fix the slider to a predetermined location on the guideline, and the window body can be opened with the free end of the window body swung downward from the upper frame at any angle, can be opened with the free end of the window body swung downward from the upper frame at any angle by fixing the slider to a predetermined location on the guideline using the fixing means, and the opening area of ​​the window body when opened can be adjusted using the fixing means, and the amount of airflow through the window body can be adjusted. [Brief explanation of the drawing]

[0027] [Figure 1] A front view of a window opening and closing system, shown as an example. [Figure 2] Top view of the window opening and closing system. [Figure 3] A close-up front view showing the window in its open position. [Figure 4] A side view of an example erection unit. [Figure 5] A close-up top view of a section of the erection unit. [Figure 6] A partially enlarged perspective view of the erection unit. [Figure 7] A close-up view of a temporary construction unit showing an example of a locking mechanism. [Figure 8] A magnified view of the erection unit, continuing from Figure 7. [Figure 9] A partially enlarged top view of a drive unit, illustrating an example of a rotation mechanism. [Figure 10] A partially enlarged top view of the drive unit, continuing from Figure 9. [Figure 11] A close-up side view of the window opening and closing system with the window itself in the closed position. [Figure 12] A partially enlarged side view of a window opening and closing system similar to the one shown in cross-section in Figure 11. [Figure 13] A close-up side view of the window opening and closing system with the window itself in the open position. [Figure 14] A partially enlarged side view of a window opening and closing system similar to the one shown in cross-section in Figure 13. [Figure 15] Another example is a side view of the erection unit. [Figure 16] A side view of the erection unit showing the slider in contact with the stopper. [Figure 17] A close-up view of the erection unit showing the slider fixed to the designated location on the guideline by set screws. [Figure 18] Cross-sectional view taken along line AA in Figure 17. [Modes for carrying out the invention]

[0028] Referring to the attached drawings, such as Figure 1, which is a front view of the window opening and closing system 10 shown as an example, the details of the window opening and closing system according to the present invention will be explained as follows. Figure 2 is a top view of the window opening and closing system 10, and Figure 3 is a partially enlarged front view showing the window body 13a in an open state. In Figures 1 and 2, the vertical direction is indicated by arrow X, the horizontal direction by arrow Y, and the front-to-back direction by arrow Z. Figure 1 shows two first and second window frames 12a, 12b and two first and second window bodies 13a, 13b, but there is no particular limit to the number of window frames or window bodies; there may be one window frame or window body, or there may be three or more window frames or window bodies.

[0029] The window opening and closing system 10 (smoke exhaust operator) is normally used for air exchange (indoor ventilation) and in emergencies (such as a fire) it is used as a smoke exhaust window to exhaust harmful smoke. The window opening and closing system 10 comprises a first window frame 12a and a second window frame 12b, a first window body 13a (first sash) installed on the first window frame 12a and a second window body 13b (second sash) installed on the second window frame 12b, a first slewing chain 14a for slewing the first window body 13a and a second slewing chain 14b for slewing 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 (extending or retracting) the slewing chains 14a and 14b.

[0030] The chain operating mechanism 17 is formed from a guideline 18 (slide line), a slider 19, a locking mechanism 20, a towing chain 21 (towing member), a first rotation mechanism 22a, and a second rotation mechanism 22b. The guideline 18, slider 19, locking mechanism 20, and towing chain 21 are installed in the erection unit 15. The first rotation mechanism 22a is installed in the first drive unit 16a (see Figure 2), and the second rotation mechanism 22b is installed in the second drive unit 16b (see Figure 2).

[0031] The first window frame 12a and the second window frame 12b are installed at a high position (near the ceiling) of a given building, and are identical in shape and size, elongated horizontally, and are arranged horizontally. These window frames 12a and 12b are formed from an upper frame 23 installed near the ceiling and extending straight horizontally, a lower frame 24 installed below the upper frame 23 and extending straight horizontally, and a first lateral frame 25a and a second lateral frame 25b extending straight vertically.

[0032] In these window frames 12a and 12b, the upper frame 23 and the lower frame 24 are positioned parallel to each other and spaced apart vertically, while the first lateral frame 25a and the second lateral frame 25b are positioned parallel to each other and spaced apart horizontally. In these window frames 12a and 12b, the upper and lower frames 23 and 24 and the first and second lateral frames 25a and 25b define two horizontally elongated rectangular window (sash) installation spaces of the same shape and size. There are no particular limitations on the size or shape of the first and second window frames 12a and 12b, and their size and shape can be freely designed.

[0033] The upper and lower frames 23, 24 and the first and second lateral frames 25a, 25b are formed in a substantially angle shape (L-shape). The upper frame 23 has an upper frame plate 26 that extends laterally and is located directly above the free ends 36 of the window bodies 13a, 13b, and an upper contact plate 27 that extends laterally perpendicular to the upper frame plate 26 and airtightly contacts the rear surfaces of the free ends 36 of the window bodies 13a, 13b. The lower frame 24 has a lower frame plate 28 that extends laterally and is located directly below the rotating ends 35 of the window bodies 13a, 13b, and a lower contact plate 29 that extends laterally perpendicular to the lower frame plate 28 and airtightly contacts the rear surfaces of the rotating ends 35 of the window bodies 13a, 13b.

[0034] The first lateral frame 25a has a first lateral frame plate 30 that is located laterally to the first lateral portion 37a of the window body 13a, 13b and extends vertically, and a first contact plate 31 that extends vertically perpendicular to the first lateral frame plate 30 and airtightly abuts against the rear surface of the first lateral portion 37a of the window body 13a, 13b. The second lateral frame 25b has a second lateral frame plate 32 that is located laterally to the second lateral portion 37b of the window body 13a, 13b and extends vertically, and a second contact plate 33 that extends vertically perpendicular to the second lateral frame plate 32 and airtightly abuts against the rear surface of the second lateral portion 37b of the window body 13a, 13b.

[0035] The first and second window frames 12a and 12b are made of resin sashes, aluminum sashes, or aluminum-resin composite sashes. These window frames 12a and 12b are connected to the wall by existing connection means, and are also connected to each other. Directly below the first and second window frames 12a and 12b (first and second window bodies 13a and 13b), an openable and closable window system 34 is installed, in which glass (glass sashes) is fitted into the window frame (resin sash, aluminum sash, or aluminum-resin composite sash). The window frames 12a and 12b and the window system 34 are connected by existing connection means. Note that a wall may be installed directly below the first and second window frames 12a and 12b (first and second window bodies 13a and 13b).

[0036] The first and second window bodies 13a and 13b (sashes) are rotatably attached to the first and second window frames 12a and 12b, and are identical in shape and size, arranged horizontally. The first and second window bodies 13a and 13b can rotate from a closed state (closed position) to an open state (fully open position), and from an open state to a closed state. There are no particular limitations on the size or shape of the first and second window bodies 13a and 13b, and their size and shape can be freely designed in accordance with the size and shape of the first and second window frames 12a and 12b.

[0037] Each window body 13a, 13b has a rotating end 35 (rotating frame) that is rotatably connected (installed) to the lower frame 24 of the window frames 12a, 12b and extends straight in the lateral direction, a free end 36 (swivel frame) that extends straight in the lateral direction, spaced apart and facing upward from the rotating end 35, and a first side part 37a (first lateral frame 37a) and a second side part 37b (second lateral frame 37b) that extend straight in the vertical direction, spaced apart and facing each other in the lateral direction. A sash fitting 38 is installed and fixed to the lateral center of the free end 36.

[0038] The rotating end 35 is airtightly in contact with the lower contact plate 29 of the lower frame 24 when the window bodies 13a and 13b are closed (closed position), and the first and second side portions 37a and 37b are airtightly in contact with the first and second contact plates 31 and 33 of the first and second side frames 25a and 25b when the window bodies 13a and 13b are closed. The free end 36 rotates to a closed position where it is airtightly in contact with the upper contact plate 27 of the upper frame 23 when closed, and rotates to a fully open position downward in the vertical direction when open. Glass is fitted into the window bodies 13a and 13b (inside the rotating end 35, free end 36, and first and second side portions 37a and 37b). The rotating end 35, free end 36, and first and second side portions 37a and 37b are made from resin sashes, aluminum sashes, or aluminum-resin composite sashes.

[0039] The first and second swivel chains 14a and 14b (roller chains) are made of metal such as steel, stainless steel, or titanium. The tip of the first swivel chain 14a is connected to the sash fitting 38 at the free end 36 of the first window body 13a, and the tip of the second swivel chain 14b is connected to the sash fitting 38 at the free end 36 of the second window body 13b. These swivel chains 14a and 14b rotate the first and second window bodies 13a and 13b from a closed state to an open state, and also rotate the window bodies 13a and 13b from an open state to a closed state.

[0040] The first and second swivel chains 14a and 14b have linear motion (straight-line movement) in their axial direction (extension direction). At the initial stage (start of swivel) when the first and second window bodies 13a and 13b are swiveled from the closed state to the open state, the chains 14a and 14b exert a pushing force (kicking force) that promotes the swivel of the free ends 36 due to their linear motion, and at the initial stage when the window bodies 13a and 13b are swiveled to the open state, they impart a swivel force to the free ends 36 of the window bodies 13a and 13b.

[0041] In the window opening and closing system 10, the first and second swivel chains 14a and 14b extend in one direction (forward in the front-rear direction), causing the free ends 36 of the first and second window bodies 13a and 13b, which are airtightly attached to the upper frame 23, to swivel downward in the vertical direction around the rotating end 35, thereby swiveling the window bodies 13a and 13b from a closed state (closed position) to an open state (fully open position) (see Figure 13). The downward swivel angle of the window bodies 13a and 13b differs depending on the extension length of the first and second swivel chains 14a and 14b, and the opening area of ​​the window bodies 13a and 13b when open can be adjusted by adjusting the extension length of the swivel chains 14a and 14b. In the window opening and closing system 10, when the first and second slewing chains 14a and 14b are pulled in the opposite direction (rearward in the front-rear direction), the free ends 36 of the first and second window bodies 13a and 13b, which have swung downward in the vertical direction, slewing upward in the vertical direction around the rotating end 35, and the window bodies 13a and 13b slewing from the open state (fully open position) to the closed state (closed position) (see Figure 11).

[0042] Figure 4 is a side view of an example erection unit 15, and Figure 5 is a partially enlarged top view of the erection unit 15. Figure 6 is a partially enlarged perspective view of the erection unit 15, and Figure 7 is a partially enlarged view of the erection unit 15 showing an example of the locking mechanism 20. Figure 8 is a partially enlarged view of the erection unit 15 continuing from Figure 7, and Figure 9 is a partially enlarged top view of the drive units 16a and 16b showing an example of the rotating mechanisms 22a and 22b. Figure 10 is a partially enlarged top view of the drive units 16a and 16b continuing from Figure 9. In Figure 4, the cover plate 42 of the erection unit 15 is shown in a cutaway. In Figure 6, the engagement cam 69 is not shown. In Figures 9 and 10, the window bodies 13a and 13b are not shown.

[0043] The erection unit 15 is made of a metal such as aluminum, stainless steel, or other alloys, or a synthetic resin, and extends straight downward from the second lateral frame 25b of the first window frame 12a. Alternatively, the erection unit 15 may extend straight downward from the first lateral frame 25a of the first window frame 12a, or from the first lateral frame 25a of the second window frame 12b. Furthermore, the erection unit 15 may extend straight downward from the second lateral frame 25b of the second window frame 12b.

[0044] The erection unit 15 is formed from a first erection plate 39 and a second erection plate 40 of the same shape and size that face each other in the front-rear direction and extend vertically, a base plate 41 and a cover plate 42 located between the first and second erection plates 39 and 40 and extending vertically perpendicular to them, a first chain storage space 43 (first guide recess) located on the side of the first erection plate 39 and extending vertically parallel to the first erection plate 39, and a second chain storage space 44 (second guide recess) located on the side of the second erection plate 40 and extending vertically parallel to the second erection plate 40.

[0045] In the erection unit 15, the first and second erection plates 39, 40 and the base plate 41 are integrally molded, and their cross-sectional shape is formed in a U-shape. The erection unit 15 defines a vertically elongated storage space 45 surrounded by these plates 39-41. In the erection unit 15, a cover plate 42 is detachably installed on the first and second erection plates 39, 40 that extend upward from the upper end 58 of the guideline 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 lateral frame 25a of the first window frame 12a and the window frame of the window equipment 34 by predetermined connecting means (brackets, bolts and nuts, rivets, welding, etc.).

[0046] The first chain storage space 43 (first guide recess) is formed from a first guide plate 46 extending vertically adjacent to the first erection plate 39, a second guide plate 47 extending vertically spaced apart from the first guide plate 46 toward the second erection plate 40, and a first guide base plate 48 extending vertically positioned between the first and second guide plates 46 and 47. The first and second guide plates 46 and 47 are formed in an angle shape (L-shape). The first and second guide plates 46 and 47 and the first guide base plate 48 are housed in the storage space 45 of the erection unit 15, and the first guide base plate 48 is connected and fixed to the base plate 41 of the erection unit 15 by predetermined connecting means (bolts and nuts, rivets, welding, etc.). The traction chain 21 is housed in the first chain storage space 43 so as to be able to move vertically (slidably).

[0047] The second chain storage space 44 (second guide recess) is formed from a third guide plate 49 extending vertically adjacent to the second erection plate 40, a fourth guide plate 50 extending vertically spaced apart from the third guide plate 49 toward the first erection plate 39, and a second guide base plate 51 extending vertically positioned between the third and fourth guide plates 49 and 50. The third and fourth guide plates 49 and 50 are formed in an angle shape (L-shape). The third and fourth guide plates 49 and 50 and the second guide base plate 51 are housed in the storage space 45 of the erection unit 15, and the second guide base plate 51 is connected and fixed to the base plate 41 of the erection unit 15 by predetermined connecting means (bolts and nuts, rivets, welding, etc.). The traction chain 21 is housed in the second chain storage space 44 so as to be vertically movable (slidable). The second guide plate 47 of the first chain storage space 43 and the fourth guide plate 50 of the second chain storage space 44 are connected by a connecting plate 52, so that the first chain storage space 43 and the second chain storage space 44 are connected as a single unit.

[0048] The first and second drive units 16a and 16b are made of metal such as aluminum, stainless steel, or other alloys, and are positioned on the upper frame 23 of the laterally aligned (adjacent) window frames 12a and 12b, extending straight in the lateral direction. These drive units 16a and 16b are formed from a first plate 53 and a third plate 55 that face each other in the front-rear direction and extend laterally, a second plate 54 that is located between the first and third plates 53 and 55 and extends laterally perpendicular to those plates 53 and 55, and a bearing plate 56 located on the sides and in the center of the drive units 16a and 16b.

[0049] In the first and second drive units 16a and 16b, the first to third plates 53 to 55 are integrally molded, and their cross-sectional shape is formed in a U-shape. In these drive units 16a and 16b, the first and second storage spaces 57a and 57b, which are elongated in the lateral direction and surrounded by the first to third plates 53 to 55, are defined. In the first and second drive units 16a and 16b, the first plate 53 is connected and fixed to the upper frame 23 of the window frames 12a and 12b by predetermined connecting means (brackets, bolts and nuts, rivets, welding, etc.).

[0050] The guideline 18 is formed on the erection unit 15 and is located below the window bodies 13a, 13b (first and second window frames 12a, 12b), extending downward from the second lateral frame 25b that forms the first window frame 12a. Alternatively, the guideline 18 may extend downward from the second lateral frame 25b of the second window frame 12b, or from the first lateral frame 25a of the first window frame 12a or the second window frame 12b. The vertical length dimension of the guideline 18 can be arbitrarily adjusted (changed) and set to a height that makes it easy to move the slider 19 up and down (a height that makes it easy to move the slider 19 up and down with little force). The guideline 18 has an upper end 58 (lower end of cover plate 42) located on the side of the window bodies 13a, 13b, a lower end 60 located on the ground side, and an intermediate part 59 (movement space) that extends vertically between the upper end 58 and the lower end 60.

[0051] The slider 19 is made of a metal such as aluminum, stainless steel, or other alloys, and consists of an upper plate 61 which is formed into a roughly elongated plate shape in the vertical direction, and a lower plate 62 which is also formed into a roughly elongated plate shape in the vertical direction and is located below the upper plate 61. The slider 19 is positioned in the middle section 59 (movement space) of the guideline 18, and by sliding vertically through the first chain storage space 43 (first guide recess), the middle section 59 (the vertically central area of ​​the erection unit 15) slides upward in the vertical direction from the lower end 60 to the upper end 58 of the guideline 18, and also slides downward in the vertical direction from the upper end 58 to the lower end 60 of the guideline 18.

[0052] One end 63 of the traction chain 21 is connected to the upper end of the upper plate 61. A first connecting portion 64 extending in the front-rear direction perpendicular to the plate 61 is integrally molded at the lower end of the upper plate 61. A second connecting portion 65 extending in the front-rear direction perpendicular to the plate 62 and facing the first connecting portion 64 is integrally molded at the upper end of the lower plate 62. Screw holes 66 (screw holes) are formed in the first and second connecting portions 64 and 65 for screwing in the threaded portion 68 of the adjustment screw 67, which will be described later.

[0053] Adjustment screws 67 are installed 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 between the plates 61 and 62. The threaded portion 68 of the adjustment screw 67 is screwed into the threaded holes 66 (screw holes) of the first and second connecting portions 64 and 65. A nut is screwed onto the threaded portion 68 of the adjustment screw 67.

[0054] For example, by rotating the adjustment screw 67 clockwise (forward direction), the first connecting part 64 and the second connecting part 65 gradually move closer together, shortening the vertical distance between the upper plate 61 and the lower plate 62. Conversely, by rotating the adjustment screw 67 counterclockwise (reverse direction), the first connecting part 64 and the second connecting part 65 gradually move further apart, lengthening the vertical distance between the upper plate 61 and the lower plate 62.

[0055] Although not shown in the diagram, a sliding piece (not shown) may be fixed to the underside of the slider 19. In this case, the sliding piece is slidably inserted (engaged) into the first chain storage space 43 (first guide recess) of the erection unit 15, and the slider 19 is positioned in the middle section 59 (movement space) of the guideline 18. As the sliding piece slides vertically within the first chain storage space 43, the slider 19 slides vertically upward through the middle section 59 (the vertically central area of ​​the erection unit 15) from the lower end 60 to the upper end 58 of the guideline 18, and also slides vertically downward through the middle section 59 from the upper end 58 to the lower end 60 of the guideline 18.

[0056] Furthermore, guide rails (guide grooves) may be formed on the first guide plate 46 and the fourth guide plate 50 that extend to the intermediate portion 59 of the guideline 18 (the central area in the vertical direction of the erection unit 15), and one side edge of the slider 19 may be slidably engaged with the guide rail (guide groove) formed on the first guide plate 46, and the other side edge of the slider 19 may be slidably engaged with the guide rail (guide groove) formed on the fourth guide plate 50. By having one side edge and the other side edge of the slider 19 slidably engaged with the guide rails, the slider 19 slides vertically upward along the intermediate portion 59 from the lower end 60 to the upper end 58 of the guide rail (guideline 18), and the slider 19 slides vertically downward along the intermediate portion 59 from the upper end 58 to the lower end 60 of the guide rail.

[0057] The locking mechanism 20 locks the slider 19's sliding (up and down movement) while applying a predetermined tension to the traction chain 21 when the slider 19 is slid downward in the vertical direction and the slider 19 is positioned at the lower end 60 of the guideline 18. The locking mechanism 20 is formed from an engaging cam 69 (planar cam) and a swivel lever 70 (swivel handle) made of metal such as aluminum, stainless steel, or other alloys.

[0058] The engaging cam 69 is positioned at the lower end 60 of the guideline 18 of the erection unit 15 and is connected (fixed) to the lower end 60 of the guideline 18 (the lower end of the first and second erection plates 39, 40 and the base plate 41 of the erection unit 15) by predetermined connecting means (bolts, rivets, welding, etc.). The engaging cam 69 has an outer peripheral edge 72 that slopes downward in the vertical direction. The outer peripheral edge 72 may also form an arc downward in the vertical direction.

[0059] The swivel lever 70 is installed at the lower end of the lower plate 62 of the slider 19 and is formed from a rotating base end 73 and a gripping part 74 (handle). The rotating base end 73 is rotatably attached to the lower end of the lower plate 62. The swivel lever 70 rotates (swivels) around the rotating base end 73, with the gripping part 74 rotating in the direction of rotation (front-back direction) (clockwise or counterclockwise direction) of the window body 13a. A swivel arm 75 is integrally molded (connected) to the side of the gripping part 74 (handle) where the rotating base end 73 is located, extending laterally (outward) from its side edge. An engagement pin 76 is formed on the swivel arm 75, which protrudes toward the base plate 41 of the erection unit 15. The engagement pin 76 engages with the engagement cam 69 in a detachable manner.

[0060] When the gripping portion 74 (swivel lever 70) is swung counterclockwise, the tip 77 of the swivel arm 74 contacts the inner surface of the second erection plate 40 of the erection unit 15, stopping further counterclockwise rotation of the gripping portion 74. The counterclockwise swivel range of the gripping portion 74 (swivel lever 70) can be adjusted by adjusting the lateral (outward) extension dimension of the swivel arm 75. By adjusting the counterclockwise swivel range of the gripping portion 74, it is possible to prevent the swivel arm 75 from swiveling more than necessary in the counterclockwise direction, thereby improving the operability of the slider 19 by the swivel lever 70.

[0061] The engaging pin 76 rotates (turns) along with the swivel arm 75 in the direction of rotation (front-to-back direction) (clockwise or counterclockwise direction) of the window body 13a as the gripping part 74 (swivel lever 70) rotates (turns). On the swivel lever 70, the engaging pin 76 moves slidably along the outer peripheral edge 72 of the engaging cam 69. While pressing the gripping part 74 (swivel lever 70) downward in the vertical direction, and applying a swivel force to the gripping part 74 (handle), the engaging pin 76 can slide (overcome) the outer peripheral edge 72 of the engaging cam 69 in one direction, and can also slide (overcome) the outer peripheral edge 72 of the engaging cam 69 in the other direction. The engaging pin 76 engages with the engaging cam 69 when it has moved (overcome) the outer peripheral edge 72 of the engaging cam 69 in one direction.

[0062] In the window opening and closing system 10, the position of the engagement pin 76 relative to the outer edge 72 of the engagement cam 69 is adjusted so that the engagement pin 76 can slide (over) the outer edge 72 in one direction or the other. By rotating the adjustment screw 67 of the slider 19 counterclockwise (reverse direction) and increasing the vertical separation between the upper plate 61 and the lower plate 62, the tension force acting on the traction chain 21 can be reduced, while allowing the engagement pin 76 of the swivel lever 70 to easily slide (over) the outer edge 72 of the engagement cam 69 in one direction or the other. By rotating the adjustment screw 67 of the slider 19 clockwise (forward direction) and shortening the vertical separation between the upper plate 61 and the lower plate 62, the tension force acting on the traction chain 21 can be increased, but on the other hand, force is required for the engagement pin 76 of the swivel lever 70 to slide (over) the outer edge 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 force acting on the traction chain 21 can be increased or decreased. This allows for adjustment of the degree of contact between the free ends 36 of the first and second window bodies 13a and 13b and the upper contact plate 27 when they are closed, thereby adjusting the airtightness of the window opening and closing system 10 when it is closed.

[0063] In the window opening and closing system 10, by adjusting the vertical separation between the upper plate 61 and the lower plate 62 using the adjustment screw 67, the optimal tension force can be applied to the traction chain 21 when locking the slider 19's slide (up and down movement), and the engagement pin 76 of the swivel lever 70 can slide (over) the outer edge 72 of the engagement cam 69 with appropriate force in one direction or the other.

[0064] The towing chain 21 (towing member) is made of a metal such as steel, stainless steel, or titanium, and one end 63 of it is connected to the upper end of the upper plate 61 of the slider 19. It is housed in the first chain storage space 43 (first guide recess) and the second chain storage space 44 (second guide recess) and extends vertically. The towing chain 21 moves up and down in the first chain storage space 43 and the second chain storage space 44 in conjunction with the vertical sliding (up and down movement) of the slider 19. The other end 78 (free end) of the towing chain 21 is located in the second chain storage space 44 (second guide recess) and hangs down from the sprocket 80, which will be described later.

[0065] When the slider 19 slides vertically upward along the middle section 59 (the vertically central area of ​​the erection unit 15) of the guideline 18 from the lower end 60 to the upper end 58, one end 63 of the towing chain 21 moves vertically upward in conjunction with it, causing the entire towing chain 21 to operate vertically. When the slider 19 slides vertically downward along the middle section 59 from the upper end 58 to the lower end of the guideline 18, one end 63 of the towing chain 21 moves vertically downward in conjunction with it, causing the entire towing chain 21 to operate vertically.

[0066] The first and second rotating mechanisms 22a and 22b are linked to the vertical movement of the traction chain 21 caused by the vertical sliding of the slider 19, and extend the first and second swivel chains 14a and 14b in one direction (forward in the front-rear direction) and pull them back (wind up) in the other direction (rearward in the front-rear direction). The first rotating mechanism 22a is formed from 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, sprocket 80, first roller 81a, first ring mounting drum 82a, and first torsion spring 83a are installed (housed) in the first housing space 57a of the first drive unit 16a.

[0067] The second rotation mechanism 22b is formed from 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.

[0068] The first and second rods 79a and 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 and 79b are rotatably housed in the first and second housing spaces 57a and 57b of the first and second drive units 16a and 16b (rotatably mounted on the window frames 12a and 12b) and extend laterally.

[0069] The first rod 79a is rotatably supported at one end and in the middle by the bearing plate 56 of the first drive unit 16a. The second rod 79b is rotatably supported at one end and in the middle by the bearing plate 56 of the second drive unit 16b. The first and second rods 79a and 79b are connected and integrated at their other ends. Therefore, when one of the first and second rods 79a and 79b rotates clockwise (forward), the other also rotates clockwise (forward), and when one rotates counterclockwise (reverse), the other also rotates counterclockwise (reverse).

[0070] 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 is engaged with the teeth of the sprocket 80. The sprocket 80 rotates clockwise (forward direction) or counterclockwise (reverse direction) as the traction chain 21 moves up and down, transmitting rotational force to the first and second rods 79a and 79b.

[0071] The outer diameter of the sprocket 80 is adjustable. Under the condition that the peripheral speed of the sprocket 80 (the speed of the slider 19) remains the same, increasing the outer diameter of the sprocket 80 increases the ratio of the diameter of the sprocket 80 to the diameters of the first and second rods 79a and 79b. This reduces the force required to rotate the window bodies 13a and 13b upwards from the open to the closed position (the force pushing the slider downwards). However, the total number of rotations of the first and second rods 79a and 79b required to move the window bodies 13a and 13b from the open to the closed position remains unchanged. Therefore, increasing the outer diameter of the sprocket 80 increases the vertical movement dimension of the slider 19. Conversely, by reducing 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 and 79b becomes smaller, increasing the force required to rotate the window bodies 13a and 13b upward from the open state to the closed state (the force pushing the slider downward), while simultaneously shortening the vertical movement dimension of the slider 19.

[0072] The window opening and closing system 10 increases the vertical movement of the slider 19 between the closed and open states of the first and second window bodies 13a and 13b by increasing the outer diameter of the sprocket 80. However, the slider 19 can be slid downward in the vertical direction without requiring a large force, and the window bodies 13a and 13b can be easily rotated from the closed state to the open state, and also easily rotated from the open state to the closed state.

[0073] The window opening and closing system 10 requires force to slide the slider 19 downward in the vertical direction by reducing the outer diameter of the sprocket 80. However, the vertical movement dimension (slide distance) of the slider 19 between the closed and open states of the first and second window bodies 13a and 13b can be reduced. As a result, the window bodies 13a and 13b can be rotated from the closed state to the open state, and vice versa, by sliding the slider 19 a short distance.

[0074] The first and second rollers 81a and 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 drive 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 drive unit 16b and is installed (fitted) in the middle of the second rod 79b.

[0075] The first roller 81a rotates clockwise (forward) or counterclockwise (reverse) in accordance with the rotation of the first rod 79a, and the second roller 81b rotates clockwise (forward) or counterclockwise (reverse) in accordance with the rotation of the second rod 79b. The other end of the first swivel chain 14a is connected to and fixed to the first roller 81a, and the other end of the second swivel chain 14b is connected to and fixed to the second roller 81b.

[0076] When viewing the sprocket 80 from the other end of the first rod 79a, the first roller 81a rotates counterclockwise, causing the first slewing chain 14a to be pulled in another direction (rearward in the front-rear direction), as shown in Figure 9. When the first roller 81a rotates clockwise, the first slewing chain 14a is unfurled from the first roller 81a in one direction (forward in the front-rear direction), as shown in Figure 10. When viewing the sprocket 80 from the other end of the second rod 79b, the second roller 81b rotates clockwise, causing the second slewing chain 14b to be pulled in another direction (rearward in the front-rear direction), as shown in Figure 9. When the second roller 81b rotates counterclockwise, the second slewing chain 14b is unfurled from the second roller 81b in one direction (forward in the front-rear direction).

[0077] The first and second ring mounting drums 82a and 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 housed in the first housing space 57a of the first drive unit 16a and is installed (fitted) on the side of one end of the first rod 79a (laterally outward from the first roller 81a). The second ring mounting drum 82b is housed in the second housing space 57b of the second drive unit 16b and is installed (fitted) on the side of one end of the second rod 79b (laterally outward from the second roller 81b).

[0078] Depending on the size and shape of the window bodies 13a and 13b, the first ring mounting drum 82a may be installed (fitted) in the middle of the first rod 79a, and the first roller 81a may be installed (fitted) on the side of one end of the first rod 79a (outward in the lateral direction 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 the side of one end of the second rod 79b (outward in the lateral direction of the second ring mounting drum 82b).

[0079] The first and second torsion springs 83a and 83b are made from hard steel wire, stainless steel wire, or spring phosphor bronze. The first torsion spring 83a is attached to the first ring mounting drum 82a and extends axially along the first rod 79a. The second torsion spring 83b is attached to the second ring mounting drum 82b and extends axially along the second rod 79b. The arm shapes of these torsion springs 83a and 83b can be short hooks, straight, or single-bend designs. The outer diameter, inner diameter, and number of turns of these torsion springs 83a and 83b can be arbitrarily set by the torque required for the upward and downward rotation of the first and second window bodies 13a and 13b (sashes) (the auxiliary force required for the downward sliding of the slider 19 in the vertical direction).

[0080] In the first rotation mechanism 22a, with the first ring mounting drum 82a inserted through the first torsion spring 83a, the fixing point of the arm of the first torsion spring 83a is connected and fixed to either the first plate to the third plates 53 to 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 edge of the first rod 79a.

[0081] In the second rotation mechanism 22b, with the second ring mounting drum 82b inserted through the second torsion spring 83b, the fixing point of the arm of the second torsion spring 83a is connected and fixed to either the first plate to the third plate 53 to 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 edge of the second rod 79b.

[0082] The first and second torsion springs 83a and 83b twist in the winding direction or in the opposite direction to the winding direction when the first and second rods 79a and 79b rotate clockwise and the first and second slewing chains 14a and 14b are extended in one direction (forward in the front-rear direction) from the first and second rollers 81a and 81b. When the first and second torsion springs 83a and 83b twist in the opposite direction to the winding direction, they generate torque (rebound force) in the opposite direction (winding direction) proportional to the twist angle, and when they twist in the winding direction, they generate torque (rebound force) in the opposite direction (opposite direction 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, coefficient of restitution) of the first and second torsion springs 83a and 83b is adjusted so that the load acting on the slider 19 when the window bodies 13a and 13b are rotated vertically from bottom to top is approximately 1.5 to 2 kg.

[0083] Figure 11 is a partially enlarged side view of the window opening / closing system 10 with the window bodies 13a and 13b closed, and Figure 12 is a partially enlarged side view of the same window opening / closing system 10 as shown in cross-section in Figure 11. Figure 13 is a partially enlarged side view of the window opening / closing system 10 with the window bodies 13a and 13b open, and Figure 14 is a partially enlarged side view of the same window opening / closing system 10 as shown in cross-section in Figure 13. In Figures 12 and 14, the traction chain 21 (traction member) is shown in an exposed state.

[0084] An example of the procedure for opening the first and second window bodies 13a and 13b by rotating the free ends 36 of the window bodies 13a and 13b downward in the vertical direction from a closed state is as follows. The window opening and closing system 10 is operated manually by people entering and exiting the building in which it is installed. When the first and second window bodies 13a and 13b are closed, the first and second swivel chains 14a and 14b are pulled in (wound up) in the opposite direction (rearward in the front-rear direction) at the first and second rollers 81a and 81b, the free ends 36 of the window bodies 13a and 13b rotate to the closed position, the rotating end 35 is airtightly attached to the lower frame 24, the first and second side parts 37a and 37b are airtightly attached to the first and second lateral frames 25a and 25b, and the free ends 36 are airtightly attached to the upper frame 23.

[0085] Furthermore, with the slider 19 positioned at the lower end 60 of the guideline 18, the engagement pin 76 of the swivel lever 70 slides (overcomes) the outer peripheral edge 72 of the engagement cam 69 in one direction, causing the engagement pin 76 to move to the locked position, and tension is applied to the traction chain 21, locking the slider 19's sliding (up and down movement). When the slider 19's sliding is locked, as shown in Figure 7, the swivel lever 70 hangs downward from the lower end 60 of the guideline 18.

[0086] First, while gripping the gripping portion 74 (handle) of the swivel lever 70, the swivel lever 70 is pressed downwards in the vertical direction, and a swivel force is applied to the gripping portion 74 of the swivel lever 70 in a counterclockwise direction (opposite direction). By applying a swivel force to the gripping portion 74, the swivel arm 75 and the engagement pin 76 swivel in a counterclockwise direction (opposite direction), and the engagement pin 76 slides over the outer edge 72 of the engagement cam 69 in another direction, moving the engagement pin 76 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 force acting on the traction chain 21 is released.

[0087] When the gripping portion 74 of the swivel lever 70 is rotated counterclockwise, the swivel arm 75 also rotates counterclockwise (in the opposite direction), and as shown in Figure 8, the tip 77 of the swivel arm 75 comes into contact with the inner surface of the second erection plate 40 of the erection unit 15. When the tip 77 of the swivel arm 75 comes into contact with the inner surface of the second erection plate 40, the counterclockwise rotation of the gripping portion 74 (swivel lever 70) stops at that point.

[0088] The extension dimension of the swivel arm 75 and the positional relationship between the engaging cam 69 and the engaging pin 76 are adjusted so that the lock is released when the swivel lever 70 (gripping part 74) is swung 15 to 20° counterclockwise (in the opposite direction) from the state shown in Figure 7, where 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 when it is swung 15 to 20° counterclockwise (in the opposite direction), the tip 77 of the swivel arm 75 contacts the inner surface of the second erection plate 40 of the erection unit 15.

[0089] Next, while gripping the gripping portion 74 (handle) of the swivel lever 70, slide the slider 19 upward in the vertical direction from the lower end 60 to the upper end 58 of the guideline 18 together with the swivel lever 70 (push it up). When the slider 19 is slid upward in the vertical direction, 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 that engages with the traction chain 21 rotates clockwise. When the sprocket 80 rotates, the first and second rods 79a, 79b (rotating mechanisms 22a, 22b) rotate clockwise in conjunction with it, and the first and second rollers 81a, 81b rotate clockwise in conjunction with the rotation of the first and second rods 79a, 79b. As the first and second rollers 81a and 81b rotate clockwise, the first and second swivel chains 14a and 14b are unfurled from the first and second rollers 81a and 81b in one direction (forward in the front-back direction), as shown in Figures 13 and 14.

[0090] At the initial stage (start of rotation) when the first and second window bodies 13a and 13b are rotated from a closed state to an open state, the first and second rotation chains 14a and 14b are extended in one direction (forward in the front-rear direction) from the first and second rollers 81a and 81b. Due to the linearity (straight-line movement) of these rotation chains 14a and 14b, they exert an extension force (kicking force) that promotes the downward rotation of the free ends 36 of the first and second window bodies 13a and 13b in the vertical direction. The free ends 36 of the first and second window bodies 13a and 13b are pushed forward in the front-rear direction by these rotation chains 14a and 14b, and a downward rotation force is applied to the free ends 36 of the window bodies 13a and 13b in the vertical direction.

[0091] The first and second window bodies 13a and 13b pivot using the payout force of the first and second pivoting chains 14a and 14b when their free ends 36 pivot from the closed position to the open position during the initial movement. During the pivoting process, excluding the initial movement, the free ends 36 of the window bodies 13a and 13b automatically pivot downward in the vertical direction around the rotating end 35 due to their own weight. As the free ends 36 of the first and second window bodies 13a and 13b automatically pivot downward in the vertical direction, the first and second pivoting chains 14a and 14b are automatically paid out in one direction (forward in the front-rear direction), causing the first and second rods 79a and 79b (rotating mechanisms 22a and 22b) to automatically rotate clockwise, and the sprocket 80 to automatically rotate clockwise. Furthermore, the tow chain 21 automatically moves upward, and the slider 19 automatically slides upward toward the upper end 58 of the guideline 18.

[0092] When the first swivel chain 14a is unwound in one direction (forward in the front-rear direction) from the first roller 81a and the first rod 79a (first ring mounting drum 82a) rotates clockwise, the load point of the arm twists in the opposite direction to the winding direction or in the winding direction, with the fixed point of the arm of the first torsion spring 83a as the twisting base. When the second swivel chain 14b is unwound in one direction (forward in the front-rear direction) from the second roller 81b and the second rod 79b (second ring mounting drum 82b) rotates clockwise, the load point of the arms twists in the opposite direction to the winding direction or in the winding direction, with the fixed point of the arms of the second torsion spring 83b as the twisting base.

[0093] When the first and second torsion springs 83a and 83b twist in the opposite direction to the winding direction, or twist in the winding direction, they generate torque in the opposite direction (winding direction or opposite direction to the winding direction) proportional to the angle of twist, and the torque of these torsion springs 83a and 83b imparts a pivoting force to the free ends 36 of the first and second window bodies 13a and 13b, causing them to pivot upward in the vertical direction from the open position to the closed position.

[0094] The window opening and closing system 10 operates the traction chain 21 (traction member) upwards by sliding the slider 19 from the lower end 60 to the upper end 58 of the guideline 18, through the intermediate section 59 (the vertical central area of ​​the erection unit 15), and the upward movement of the traction chain 21 rotates the sprocket 80 (rotating mechanism 22a, 22b), which unwinds the first and second swivel chains 14a, 14b from the first and second rollers 81a, 81b, and swivels the first and second window bodies 13a, 13b from the closed state to the open state. Therefore, the window bodies 13a, 13b can be swung from the closed state to the open state simply by sliding the slider 19 upwards and downwards, and the first and second window bodies 13a, 13b can be swung smoothly from the closed state to the open state and easily opened without requiring much effort or time.

[0095] The window opening and closing system 10 utilizes the payout force (torque) of the first and second pivoting chains 14a and 14b to pivot the free ends 36 of the first and second window bodies 13a and 13b from the closed position to the open position during the initial pivoting motion. In the pivoting process, excluding the initial motion, the free ends 36 of the window bodies 13a and 13b automatically pivot downward in the vertical direction due to their own weight. Therefore, by utilizing the payout force of the first and second pivoting chains 14a and 14b, the window bodies 13a and 13b can be reliably pivoted during the initial motion when the slider 19 is slid upward in the vertical direction. This allows the window bodies 13a and 13b to be smoothly pivoted from the closed state to the open state by sliding the slider 19 upward, making it easy to open the window bodies 13a and 13b. In the window opening and closing system 10, the free ends 36 of the window bodies 13a and 13b are rotated by the payout force (torque) of the first and second slewing chains 14a and 14b during the initial movement, and during the rotation process other than the initial movement, the free ends 36 of the first and second window bodies 13a and 13b are automatically rotated downward in the vertical direction by the weight of the window bodies 13a and 13b, so that in an emergency the window bodies 13a and 13b can be opened all at once without requiring the sliding operation of the slider 19.

[0096] The window opening and closing system 10 is unlocked when the gripping part 74 (swivel lever 70) is rotated counterclockwise (either forward or reverse) while the slider 19 is locked, moving the engagement pin 76 to the unlocked position where it slides over the outer peripheral edge 72 of the engagement cam 69. This allows the lock on the slider 19 to be easily released from its locked state, and the first and second window bodies 13a and 13b to be easily opened.

[0097] The window opening and closing system 10 can be released by rotating the gripping part 74 (swivel lever 70) 15 to 20° from the locked state of the slider 19. Therefore, the lock can be released easily and quickly without having to rotate the gripping part 74 (swivel lever 70) a large distance (for example, 90°) from the locked state of the slider 19.

[0098] An example of the procedure for closing the first and second window bodies 13a and 13b by rotating the free ends 36 of the window bodies 13a and 13b upward in the vertical direction, starting from an open state, is as follows: While gripping the handle 74 of the pivot lever 70, slide (push down) the slider 19 together with the pivot lever 70 downward in the vertical direction from the upper end 58 to the lower end 60 of the guideline 18. Note that the load (kg) acting on the slider 19 when pivoting the window bodies 13a and 13b from the lower to the upper direction is adjusted to approximately 1.5 to 2 kg by the torque (repulsive force) of the first and second torsion springs 83a and 83b.

[0099] When the slider 19 is slid downward, the towing chain 21 moves downward in the vertical direction in conjunction with the sliding of the slider 19, and the sprocket 80 that engages with the towing chain 21 rotates counterclockwise. As the sprocket 80 rotates, the first and second rods 79a, 79b (rotating mechanisms 22a, 22b) rotate counterclockwise in conjunction with it, and the first and second slewing chains 14a, 14b are wound onto the first and second rollers 81a, 81b in the opposite direction (rearward in the front-rear direction).

[0100] As the first and second swivel chains 14a and 14b are wound onto the first and second rollers 81a and 81b, the free ends 36 of the first and second window bodies 13a and 13b begin to swivel upward in the vertical direction from the open position to the closed position. Because the torque of the first and second torsion springs 83a and 83b imparts a swiveling force to the free ends 36 of the first and second window bodies 13a and 13b that causes them to swivel from the open position to the closed position, the entire weight of the window bodies 13a and 13b does not act on the slider 19. Instead, a load (in the range of 1.5 to 2 kg) is applied to the slider 19, which is the weight of the window bodies 13a and 13b minus the repulsive force of the torsion springs 83a and 83b.

[0101] By sliding (pushing down) the slider 19 to the lower end 60 of the guideline 18, the first and second window bodies 13a and 13b rotate from the open state to the closed state. When the first and second window bodies 13a and 13b are closed, the twist of the first and second torsion springs 83a and 83b is released, and the torque of these torsion springs 83a and 83b becomes zero. After sliding the slider 19 to the lower end 60 of the guideline 18, while gripping the gripping portion 74 of the swivel lever 70, a swivel force is applied to the gripping portion 74 in a clockwise direction (forward direction) while pressing (pushing down) the swivel lever 70 in the vertical direction.

[0102] By applying a rotational force to the gripping part 74 and rotating the rotation lever 70 15-20° clockwise (forward direction), the engagement pin 76 rotates clockwise (forward direction), and as the engagement pin 76 slides (overcomes) the outer edge 72 of the engagement cam 69 in one direction, the engagement pin 76 moves to the locked position, and the engagement pin 76 and the engagement cam 69 engage. When the engagement pin 76 is moved to the locked position, the rotation lever 70 hangs down from the lower end 60 of the guideline 18, tension is applied to the traction chain 21, and the sliding (up and down movement) of the slider 19 is locked. As the engaging pin 76 moves to the locked position and tension is applied to the traction chain 21, the rotating end 35 becomes airtight against the lower frame 24, the first and second side portions 37a and 37b become airtight against the first and second side frames 25a and 25b, and the free end 36 becomes airtight against the upper frame 23.

[0103] The window opening and closing system 10 operates the traction chain 21 (traction member) downward in the vertical direction by sliding the slider 19 downward from the upper end 58 of the guideline 18. The downward movement of the traction chain 21 rotates the sprocket 80 (rotating mechanism 22a, 22b), winding the first and second swivel chains 14a, 14b onto the first and second rollers 81a, 81b, and swiveling the first and second window bodies 13a, 13b from the open state to the closed state. Therefore, the window bodies 13a, 13b can be swiveled from the open state to the closed state simply by sliding the slider 19 downward in the vertical direction, and the first and second window bodies 13a, 13b can be swiveled smoothly from the open state to the closed state and easily closed without requiring any effort or time. The window opening and closing system 10 does not require the winding handle to be rotated multiple times as in conventional technology when closing the open window bodies 13a and 13b. Instead, the slider 19 is simply slid downwards in the vertical direction, allowing the open window bodies 13a and 13b to be closed in a short time with a simple sliding operation.

[0104] The window opening and closing system 10 rotates the gripping portion 74 of the swivel lever 70 clockwise (forward direction) at the lower end 60 of the guideline 18, moving the engagement pin 76 of the swivel lever 70 to a locked position where it slides over the outer edge 72 of the engagement cam 69, thereby applying tension to the traction chain 21 and locking the sliding (up and down movement) of the slider 19. By moving the engagement pin 76 to the locked position, the closed positions of the first and second window bodies 13a and 13b can be clearly confirmed, and the window bodies 13a and 13b are never left in an incompletely closed state, ensuring that the window bodies 13a and 13b are closed completely, reliably and airtightly.

[0105] The window opening and closing system 10 locks the slider 19 while tension is applied to the traction chain 21, so the traction chain 21 does not loosen, and the first and second window bodies 13a and 13b can be closed airtightly, preventing air from passing through when the window bodies 13a and 13b are closed. The window opening and closing system 10 can lock the slider 19 by rotating the gripping part 74 of the swivel lever 70 by 15 to 20° from the unlocked state of the slider 19, so the slider 70 can be locked easily and quickly without having to rotate the gripping part 74 of the swivel lever 70 by a large amount (for example, 90°) from the unlocked state of the slider 19.

[0106] When closing the first and second window bodies 13a and 13b, which are in the open state, without using the first and second torsion springs 83a and 83b, considerable force is required to slide the slider 19 downward in the vertical direction due to the weight of the window bodies 13a and 13b. However, in the window opening and closing system 10, the torque (repulsive force) of the torsion springs 83a and 83b facilitates the winding of the first and second swivel chains 14a and 14b onto the first and second rollers 81a and 81b, and the window bodies 13a and 13b The torque of the torsion springs 83a and 83b is adjusted so that the load acting on the slider 19 when b is rotated from the bottom to the top in the vertical direction is about 1.5 to 2 kg. By utilizing these torsion springs 83a and 83b, the slider 19 can be easily slid downward in the vertical direction without requiring much force, and the first and second window bodies 13a and 13b can be smoothly rotated from the open state to the closed state, making it easy to close the window bodies 13a and 13b.

[0107] Figure 15 is a side view of the erection unit 15 as another example, and Figure 16 is a side view of the erection unit 15 with the slider 19 in contact with the stopper 84. Figure 17 is a partially enlarged view of the erection unit 15 showing the slider 19 fixed to a predetermined location on the guideline 18 by a set screw 85, and Figure 18 is a cross-sectional view taken along line AA in Figure 17. The difference between the erection unit 15 shown in Figures 15 to 18 and that in Figure 4 is that a stopper 84 is installed at a predetermined location on the guideline 18 of the erection unit 15, and a set screw 85 (fixing means) is installed on the slider 19.

[0108] The other components of the window opening / closing system 11 equipped with the erection unit 15 shown in Figures 15 to 18 are the same as those of the window opening / closing system 10 shown in Figure 1; therefore, the explanation of the other components of the window opening / closing system 11 will be based on the description in Figure 1. Furthermore, since the configuration of the erection unit 15 is the same as that in Figure 4, the explanation of the configuration of the erection unit 15 will be based on the description in Figure 4, and the same reference numerals as in Figure 4 will be used, thus omitting the explanation of the configuration of the erection unit 15.

[0109] A stopper 84 is detachably attached to the guideline 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 section 59 (movement space) of the guideline 18 by a predetermined connecting means. The upper end of the upper plate 61 of the slider 19, which slides upward in the vertical direction, comes into contact with the stopper 84. When the upper end of the upper plate 61 comes into contact with the stopper 84, the slider 19 stops sliding any further upward.

[0110] The installation position of the stopper 84 in the intermediate section 59 (movement space) of the guideline 18 can be determined arbitrarily. By adjusting the installation position of the stopper 84 in the intermediate section 59 of the guideline 18, the vertical movement distance (slide distance) of the slider 19 on the guideline 18 can be adjusted, and the downward rotation angle (opening area) of the first and second window bodies 13a and 13b in the vertical direction can be adjusted.

[0111] When the sliding (up and down movement) lock of the slider 19 is released and the slider 19 is slid upward in the vertical direction from the lower end 60 to the upper end 58 of the guideline 18 together with the swivel lever 70, the free ends 36 of the first and second window bodies 13a and 13b automatically swivel downward in the vertical direction around the rotating end 35 due to the weight of the first and second window bodies 13a and 13b during the swivel 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 comes into contact with the stopper 84, the sliding of the slider 19 along 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 outward extension of the first and second swivel chains 14a and 14b in one direction (forward in the front-rear direction) stops.

[0112] When the slider 19 contacts the stopper 84 and the extension of the swivel chains 14a and 14b stops, the downward swivel of the free ends 36 of the first and second window bodies 13a and 13b in the vertical direction stops. Depending on the installation position of the stopper 84 in the intermediate part 59 (movement space) of the guideline 18, the downward swivel angle of the first and second window bodies 13a and 13b in the vertical direction differs, and the opening area of ​​the window bodies 13a and 13b when they are open differs.

[0113] The set screw 85 (fixing means) is made of metal such as aluminum, stainless steel, or other alloys, or synthetic resin, and is formed from an operating part 86 (head), a screw part 87, and a slide-stopping roller 88. In the set screw 85, the top of the screw part 87 is fixed to the operating part 86, and the slide-stopping roller 88 is inserted through and fixed to the bottom of the screw part 87. The screw part 87 is screwed into a screw hole (threaded hole) formed in the upper plate 61 of the slider 19. When the operating part 86 of the set screw 85 is rotated clockwise (forward), the screw part 87 moves forward toward the connecting plate 52 (base plate 41) of the erection unit 15, and when the operating part 86 of the set screw 85 is rotated counterclockwise (reverse), the screw part moves backward toward the connecting plate 52 (base plate 41) of the erection unit 15.

[0114] To use the set screw 85, while gripping the swivel lever 70, the slider 19 is gradually slid upward in the vertical direction from the lower end 60 to the upper end 58 of the guideline 18, and the sliding of the slider 19 is stopped at a predetermined point on the guideline 18. At the point when the sliding of the slider 18 is stopped, the operating part 86 of the set screw 85 is rotated counterclockwise (in the opposite direction), and the screw part 87 is retracted so as to move away from the connecting plate 52 (base plate 41) of the erection unit 15. When the screw part 87 is retracted, the tapered part of the slide-stopping roller 88 attached to the screw part 87 presses against the projections that protrude inward from the inner surfaces of the second and third guide plates 47 and 49, and at that point the slider 19 is fixed to the erection unit 15. When the slider 19 is fixed to the erection unit 15, further upward sliding of the slider 19 is prevented, and the extension of the first and second swivel chains 14a and 14b in one direction (forward in the front-rear direction) is stopped.

[0115] When the tapered portion of the slide-stopping roller 88 of the set screw 85 presses against the projections on the inner surfaces of the second and third guide plates 47 and 49, and the extension of the swivel chains 14a and 14b stops, the downward swivel of the free ends 36 of the first and second window bodies 13a and 13b stops. Depending on the fixing position of the slider 19 in the guideline 18 using the set screw 85, the downward swivel angle of the first and second window bodies 13a and 13b differs, and the opening area of ​​the window bodies 13a and 13b when they are open differs.

[0116] After fixing the slider 19 to the connecting plate 52 with the set screw 85, to release the slider 19, the operating part 86 of the set screw 85 is rotated clockwise (forward direction), and the screw part 87 is advanced toward the connecting plate 52 (base plate 41). When the screw part 87 is advanced, the tapered part of the slide-stopping roller 88 separates from the projections on the inner surfaces of the second and third guide plates 47 and 49, releasing the pressure of the tapered part of the slide-stopping roller 88 on the projections on the inner surfaces of the second and third guide plates 47 and 49, thus releasing the slider 19 and allowing it to slide vertically.

[0117] The window opening and closing system 11 allows adjustment of the upward movement distance (slide distance) of the slider 19 from the lower end 60 of the guideline 18 by adjusting the installation position of the stopper 84 on the guideline 18, and the downward rotation angle of the free ends 36 of the first and second window bodies 13a and 13b from the upper frame 23 can be adjusted. Thus, the opening area of ​​the window bodies 13a and 13b when open can be adjusted by the stopper 84, and the airflow rate of the air passing through the window bodies 13a and 13b can be adjusted.

[0118] The window opening and closing system 11 allows the free ends 36 of the window bodies 13a and 13b to be rotated downward from the upper frame 23 at any angle by fixing the slider 19 at a predetermined location on the guideline 18 using the set screws 85 (fixing means). This allows the opening area of ​​the window bodies 13a and 13b when open to be adjusted using the set screws 85, and thus the amount of airflow through the window bodies 13a and 13b can be adjusted. [Explanation of Symbols]

[0119] 10 Window opening and closing system 11 Window opening and closing system 12a First window frame 12b Second Window Frame 13a First window body (first shoji screen) 13b Second window main body (second shoji screen) 14a First swivel chain 14b Second Swivel Chain 15 Erection Unit 16a First drive unit 16b Second drive unit 17 Chain Actuator 18 Guidelines 19 Slider 20 Locking mechanism 21. Towing chain (towing component) 22a First rotation mechanism 22b Second rotation mechanism 23 Upper Frame 24 Lower frame 25a First side frame 25b Second lateral frame 26 Upper frame plate 27 Upper contact plate 28. Bottom frame plate 29 Lower contact plate 30. First side frame plate 31. First contact plate 32. Second side frame plate 33. Second contact plate 34 Window equipment 35. Rotating end (rotating frame) 36. Free end (swivel frame) 37a First side section (first side frame) 37b Second side section (second side frame) 38 Shoji hardware 39. First erection plate 40. Second erection 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 spaces 46. ​​First guide plate 47. Second guide plate 48. First guide base plate 49. Third guide plate 50. Fourth guide plate 51. Second guide base plate 52 Connecting Plates 53 Plate 1 54. Second Plate 55 Third Plate 56 Bearing Plate 57a First containment space 57b Second containment space 58 Top 59. Intermediate section (movement space) 60 bottom end 61 Top plate 62 Lower plate 63 One end 64 1st connection part 65 2nd connection part 66 Screw holes (threaded holes) 67 Adjustment screw 68 Screw part 69 Engaging Cam 70. Swivel lever (swivel handle) 72 Outer edge 73 Rotating base 74. Grip (handle) 75 Swivel Arm 76 Engagement pins 77 Tip 78 Other end (free end) 79a First Rod 79b Second Rod 80 sprocket 81a First Roller 81b Second Roller 82a First Ring Mounting Drum 82b Second Ring Mounting Drum 83a First Torsion Spring 83b Second Torsion Spring 84 Stopper 85. Set screw (fixing means) 86 Control section 87 Screw part 88 Slide stop roller

Claims

1. A window opening and closing system comprising: a window body whose free end pivots vertically around a rotating end rotatably installed on a window frame; a pivoting chain connected to the free end of the window body, which pivots the window body from a closed state to an open state and from the open state to a closed state; and a chain actuation means that pays out the pivoting chain in one direction to pivot the window body from a closed state to an open state and pulls the pivoting chain in the other direction to pivot the window body from an open state to a closed state, wherein The chain operating means comprises a guideline located below the window frame and extending vertically, a slider that slides vertically along the guideline, a traction chain with one end connected to the slider and moving vertically in conjunction with the vertical sliding of the slider, a rotating mechanism that rotates in conjunction with the vertical movement of the traction chain to wind up and unwind the swivel chain, and a locking mechanism that applies tension to the traction chain and locks the slider's slide when the slider is slid downward in the vertical direction and the slider is positioned at the lower end of the guideline. The locking mechanism is formed from an engaging cam formed at the lower end of the guideline and a pivot lever rotatably mounted at the lower end of the slider, having an engaging pin at its pivot base located at the lower end of the slider, the engaging pin moving along the outer edge of the engaging cam. The window opening and closing system, after moving the slider to the lower end of the guideline, rotates the swivel lever in either forward or reverse direction, moving the engagement pin along the outer edge of the engagement cam to a predetermined locked position, thereby applying tension to the towing chain and locking the slider's slide; and while the slider's slide is locked, rotates the swivel lever in either forward or reverse direction to move the engagement pin along the outer edge of the engagement cam to a predetermined unlocked position, thereby allowing the slider to slide along the guideline. The window opening and closing system is characterized by sliding the slider vertically along the guideline to operate the traction chain vertically, rotating the rotating mechanism and extending the swivel chain in one direction to swivel the window body from a closed state to an open state, or rotating the rotating mechanism and pulling the swivel chain in the other direction to swivel the window body from an open state to a closed state.

2. The window opening and closing system according to claim 1, wherein the slider is slid upward in the vertical direction from the lower end of the guideline to operate the traction chain upward in the vertical direction, the rotating mechanism is rotated and the swivel chain is extended in one direction to swivel the window body from a closed state to an open state, the slider is slid downward in the vertical direction from the upper end of the guideline to operate the traction chain downward in the vertical direction, the rotating mechanism is rotated and the swivel chain is pulled in the other direction to swivel the window body from an open state to a closed state.

3. The window frame is formed from an upper frame and a lower frame that are spaced apart in the vertical direction and extend horizontally, and first and second lateral frames that are spaced apart in the horizontal direction and extend vertically, and the window body has a rotating end that is rotatably connected to the lower frame and airtightly adheres to the lower frame in the closed state, and a free end that rotates to a closed position airtightly adheres to the upper frame in the closing operation and rotates to an open position downward in the vertical direction in the opening operation, and the swivel chain exerts a payout force that facilitates the rotation of the free end by its linearity at the initial movement of rotating the window body from a closed state to an open state, and the window opening and closing system rotates the free end of the window body using the payout force of the swivel chain at the initial movement of rotating the free end of the window body from a closed position to an open position, and during the rotation process excluding the initial movement, the free end of the window body automatically rotates downward in the vertical direction by the weight of the window body, as described in claim 1 or claim 2.

4. The window opening and closing system according to claim 3, wherein the rotating mechanism comprises 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 in conjunction with the vertical movement of the traction chain, and a roller formed on the other side of the rod with which the swivel chain is connected, which unwinds the swivel chain and winds it up in conjunction with the rotation of the sprocket.

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

6. The window opening and closing system according to any one of claims 3 to 5, wherein the window opening and closing system includes a support unit extending downward from either a first lateral frame or a second lateral frame forming the window frame, and the guideline is formed on the support unit, located below the window frame and extending vertically.

7. The window opening and closing system according to claim 6, wherein the erection unit is formed from a first guide plate and a second guide plate that face each other and extend vertically, and a base plate that is located between the first and second guide plates and extends vertically, and a first chain housing space for housing the traction chain so as to be able to move up and down is formed on the side of the first guide plate and extends vertically, and a second chain housing space for housing the traction chain so as to be able to move up and down is formed on the side of the second guide plate and extends vertically.

8. The window opening and closing system according to any one of claims 3 to 7, wherein the window opening and closing system includes a stopper that is detachably 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 able to adjust the vertical sliding distance of the slider from the lower end of the guideline by adjusting the installation position of the stopper on the guideline, and is able to adjust the downward rotation angle of the free end of the window body from the upper frame.

9. The window opening and closing system according to any one of claims 3 to 8, wherein the window opening and closing system includes fixing means installed on the slider and fixing the slider to a predetermined location on the guideline, the window opening and closing system is capable of fixing the slider to a predetermined location on the guideline using the fixing means in the process of sliding the slider up and down on the guideline, and the window opening and closing system is capable of opening the window body with the free end of the window body rotated downward from the upper frame at any angle.

Images