Window opening and closing system

Abstract

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

Description

Technical Field

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

Background Art

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

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 aforementioned 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 wire that rotates the window from an open state to a closed state, and a wire actuation mechanism that extends the wire in one direction to rotate the window body from a closed state to an open state, and pulls the wire 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 a kicking mechanism for applying a pivoting force to the window body at the initial movement of pivoting the window body from a closed state to an open state is installed on either the window frame or the window body, and a wire operating mechanism is located below the window frame and extends vertically, a slider slides vertically along the guideline, and the slider One end The connected traction unit moves up and down in conjunction with the vertical sliding of the slider. chain and towing chain A rotating mechanism that rotates in conjunction with the up-and-down movement, winding up and unwinding the wire. 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 engagement cam formed at the lower end of the guideline and a pivot lever rotatably mounted at the lower end of the slider, having 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. The window opening and closing system is operated by moving the slider to the lower end of the guideline, then rotating the pivot lever 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 locking the slider slide while tension is applied to the traction chain. With the slider slide locked, rotating the pivot lever 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. The window opening and closing system involves sliding a slider up and down along a guideline to pull it open. chain The mechanism is operated vertically, rotating the rotating mechanism while the wire is extended in one direction. At the initial stage, the kicking force of the kicking mechanism is used to apply a pivoting force to the window body, causing it to rotate from a closed state to an open state. Alternatively, the slider is slid vertically along the guideline to pull. chain The mechanism operates vertically, rotating the rotating mechanism while simultaneously pulling the wire in another direction to rotate the window body from an open to a closed position.

[0008] As an example of the present invention, the window opening and closing system pulls by sliding the slider upward in the vertical direction from the lower end of the guideline. chain The mechanism is operated upward in the vertical direction, rotating the rotating mechanism while the wire is extended in one direction. At the initial movement, the kicking force of the kicking mechanism is used to apply a pivoting force to the window body, rotating the window body from the closed state to the open state. The slider is then slid downward in the vertical direction from the upper end of the guideline to pull. chain The mechanism is operated downwards in the vertical direction, and while rotating the rotating mechanism, the wire is pulled in another direction to rotate the window body from the open position to the closed position.

[0009] Another example of the present invention is a kicking spring that applies a pivoting force to the window body when the free end of the window body pivots from the closed position to the open position, 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, the window body has a pivoting end that is rotatably mounted on the lower frame and airtightly adheres to the lower frame in the closed state, and pivots to a closed position that is airtightly adheres to the upper frame in the closing operation, while pivoting to an open position that is vertically lower in the opening operation. The window opening and closing system has a free end that pivots and first and second side portions that are spaced apart laterally and facing each other and extend vertically, with a pair of kick springs installed on the first and second side frames or the first and second side portions. In the initial movement when the free end of the window body pivots from the closed position to the open position, a pivoting force is applied by the repulsive force of the kick springs, causing it to pivot. In the pivoting process, excluding 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, and before the free end of the window body pivots to the closed position, the free end pivots upward in the vertical direction against the repulsive force of the kick springs.

[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 traction chain engages and which rotates in conjunction with the up-and-down movement of the traction chain, and a roller formed on the other end of the rod with which a wire is connected and which feeds out and winds up the wire 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 such that when the rod rotates in the direction of wire payout, the torsion spring twists in the winding direction or the opposite direction, the torsion spring generates torque in the direction of pulling the wire, and the torque of the torsion spring facilitates the winding of the wire 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, rotating the rotation mechanism while paying out a wire in one direction, and the kicking force of the kicking means is used at the initial movement to apply a pivoting force to the window body, thereby rotating the window body from a closed state to an open state. As a result, the window body can be rotated from a closed state to an open state simply by sliding the slider up and down, and the window body can be smoothly rotated from a closed state to an open state without requiring effort or time, making it easy to open the window body. The window opening and closing system slid the slider up and down along the guideline to operate the traction member up and down, rotating the rotation mechanism while pulling the wire in the other direction, thereby rotating the window body from an open state to a closed state. As a result, the window body can be rotated from an open state to a closed state simply by sliding the slider up and down, and the window body can be smoothly rotated from an open state to a closed state without requiring effort or time, making it easy to close the window body. The window opening and closing system utilizes the kicking force of the kicking mechanism to impart a pivoting force to the window body during initial movement. Therefore, when the slider is slid up and down, the kicking force of the kicking mechanism ensures that the window body is reliably pivoted, and the window body can be reliably opened. When closing the opened window body, the window opening and closing system does not require the winding handle to be rotated multiple times as in conventional technology; only the slider needs to be slid up and down, allowing the open window body to be closed quickly with a simple sliding operation.

[0017] This window opening and closing system, which involves sliding a slider upward from the lower end of the guideline to activate the traction member upward, rotating the rotation mechanism and paying out a wire in one direction, and using the kicking force of the kicking means at the initial movement to apply a pivoting force to the window body and pivot the window body from a closed state to an open state, and sliding a slider downward from the upper end of the guideline to activate the traction member downward, rotating the rotation mechanism and pulling the wire in the other direction to pivot the window body from an open state to a closed state, allows the window body to be pivoted from a closed state to an open state simply by sliding the slider upward, requiring no effort or time, and the window body to be smoothly pivoted from a closed state to an open state simply by sliding the slider downward, requiring no effort or time, and the window body to be smoothly pivoted from an open state to a closed state and 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 the slider downwards, allowing the open window to be closed quickly with a simple sliding operation.

[0018] The kicking mechanism is a kicking spring that applies a pivoting force to the window body during the initial movement of rotating the free end of the window body from the closed position to the open position, the window frame is formed from an upper frame and a lower frame and first and second lateral frames, the window body has a rotating end rotatably installed on the lower frame, a free end that pivots to an open position in the vertical direction downward, and first and second lateral parts, a pair of kicking springs are installed on the first and second lateral frames of the window frame or on the first and second lateral parts of the window body, and during the initial movement of rotating the free end of the window body from the closed position to the open position, a pivoting force is applied by the repulsive force of these kicking springs and it pivots, and during the pivoting process except for 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, and the window body In a window opening and closing system where the free end of the window body pivots upward against the repulsive force of the springs before it pivots to the closed position, the free end of the window body pivots using the repulsive force of the springs during the initial movement from the closed position to the open position. In the rotation process excluding the initial movement, the free end of the window body automatically pivots downward due to the weight of the window body. By utilizing the repulsive force of the springs and the weight of the window body, the window body can be reliably pivoted when the slider is slid vertically (upward), and the window body can be smoothly pivoted from the closed state to the open state without requiring effort or time by sliding the slider vertically (upward). In an emergency, the window opening and closing system allows the window body to be opened all at once without requiring the slider to be slid, because the free end of the window body automatically pivots downward due to the weight of the window body during the rotation process excluding the initial movement. In the window opening and closing system, the free end of the window body pivots upward in the vertical direction against the repulsive force of the springs before it pivots to the closed position. Therefore, when opening the window body again, the repulsive force of the springs can be used again at the initial movement to smoothly open the window body.

[0019] In this window opening and closing system, the towing member is a towing chain with one end connected to the slider and moving up and down in conjunction with the vertical sliding of the slider, and the rotating mechanism is formed from a rod rotatably installed on the window frame, a sprocket that rotates in conjunction with the vertical movement of the towing chain, and a roller that pays out and rewinds a wire as the sprocket rotates. By sliding the slider up and down (upwards) from the lower end of the guideline, the towing chain is operated up and down (upwards), and the operation of the towing chain up and down (upwards) rotates the sprocket, which pays out the wire from the roller, and the window body is rotated 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 (upwards), and the window body can be smoothly rotated from a closed state to an open state and opened easily without requiring much effort or time. The window opening and closing system works by sliding a slider vertically (downward) from the top of the guideline, which activates the towing chain vertically (downward). This vertical movement of the towing chain rotates a sprocket, winding the wire onto a roller and rotating the window body from the open to the closed position. Therefore, the window body can be rotated from the open to the closed position simply by sliding the slider vertically (downward), saving time and effort, and allowing the window body to be smoothly rotated from the open to the closed position and easily closed.

[0020] The window opening and closing system includes a torsion spring that generates torque in the opposite direction proportional to the twisted angle of the rotating mechanism. When the rod rotates in the direction of paying out the wire, the torsion spring is twisted in the winding direction or the direction opposite to the winding direction, and the torsion spring generates torque in the direction of pulling the wire (winding direction). The torque of the torsion spring promotes the winding of the wire around the roller. When closing the window body in the open state, although force is required to slide the slider downward in the vertical direction due to the weight of the window body, the torque of the torsion spring promotes the winding of the wire around the roller. Therefore, by using the torsion spring, the slider can be slid downward in the vertical direction without requiring a large force, and the window body can be smoothly pivoted from the open state to the closed state to easily close the window body.

[0021] The window opening and closing system includes an erection unit extending downward from either one of the first side frame and the second side frame that form the window frame. A guideline is formed in the erection unit and is located below the window frame and extends in the vertical direction. By forming the guideline in the erection unit so as to extend vertically from below the window frame, the slider is arranged at a position where it is easy to apply force to the slider, and the slider can be easily slid upward or downward in the vertical direction. The window body can be smoothly pivoted from the closed state to the open state to easily open the window body, and the window body can be smoothly pivoted from the open state to the closed state to easily close the window body.

[0022] The erection unit is formed by a first guide plate and a second guide plate that extend vertically and face 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. The window opening and closing system is The traction chain is vertically movably accommodated in the first and second chain accommodation spaces, so that the slider is slid in the vertical direction (vertically upward from the lower end of the guide line) on the guide line to operate the traction chain vertically in the first and second chain accommodation spaces. By the operation of the traction chain, the sprocket is rotated to pay out the wire from the roller, and the window body is pivoted from the closed state to the open state. Therefore, the window body can be pivoted from the closed state to the open state only by sliding the slider vertically (vertically upward), without requiring labor and time, and the window body can be smoothly pivoted from the closed state to the open state to easily open the window body. The window opening and closing system slides the slider vertically (vertically downward from the upper end of the guide line) on the guide line to operate the traction chain vertically in the first and second chain accommodation spaces. By the operation of the traction chain, the sprocket is rotated to wind up the wire on the roller, and the window body is pivoted from the open state to the closed state. Therefore, the window body can be pivoted from the open state to the closed state only by sliding the slider vertically (vertically downward), without requiring labor and time, and the window body can be smoothly pivoted from the open state to the closed state to easily close the window body.

[0023] A window opening and closing system including a locking mechanism that locks the sliding of the slider while applying a tension to the traction chain when the slider is slid downward in the vertical direction and the slider is located at the lower end of the guide line can clearly confirm the closed position of the window body by locking the sliding (vertical movement) of the slider by the locking mechanism, and the window body will not be left in an incompletely closed state, and the window body can be surely closed in a complete state. The window opening and closing system locks the sliding of the slider in a state where a tension is applied to the traction chain, so that the traction chain will not loosen, the window body can be hermetically closed, and the air flow when the window body is closed can be prevented.

[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, having 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 traction chain. With the slider slide locked, the pivot lever is rotated in either the forward or reverse direction to the other direction. In this window opening and closing system, the slider can be moved by moving the engagement pin along the outer edge of the engagement cam to a predetermined unlocked position. By rotating the swivel lever in either the forward or reverse direction at the lower end of the guideline, the engagement pin is moved along the outer edge of the engagement cam to a predetermined locked position, applying tension to the traction chain and locking the slider's slide (up and down movement). Therefore, by moving the engagement pin to the locked position, the closed position of the window body can be clearly confirmed, the window body will not be left in an incompletely closed state, and the window body can be reliably closed completely. In this window opening and closing system, the slider slide is locked while tension is applied to the traction chain, so the traction chain will not loosen, the window body can be closed airtightly, and airflow during the closing of the window body can be prevented. In this window opening and closing system, the lock is released by rotating the swivel lever in either the forward or reverse direction with the slider slide locked, moving the engagement pin along the outer edge of the engagement cam to a predetermined unlocked position. Therefore, the lock can be easily released from the locked state of the slider slide, and the window body can be easily opened.

[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 rotation angle from the upper frame of the rotating 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 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 kick spring 14a and a second kick spring 14b, a first wire 15a that rotates the first window body 13a and a second wire 15b that rotates the second window body 13b, a mounting unit 16 (chain box), a first drive unit 17a and a second drive unit 17b, and a chain operating means 18 that operates (extends or retracts) the wires 15a and 15b.

[0030] The chain operating mechanism 18 is formed from a guideline 19 (slide line), a slider 20, a locking mechanism 21, a towing chain 22 (towing member), a first rotation mechanism 23a, and a second rotation mechanism 23b. The guideline 19, slider 20, locking mechanism 21, and towing chain 22 are installed in the erection unit 16. The first rotation mechanism 23a is installed in the first drive unit 17a (see Figure 2), and the second rotation mechanism 23b is installed in the second drive unit 17b (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 24 installed near the ceiling and extending straight horizontally, a lower frame 25 installed below the upper frame 24 and extending straight horizontally, and a first lateral frame 26a and a second lateral frame 26b extending straight vertically.

[0032] In these window frames 12a and 12b, the upper frame 24 and the lower frame 25 are positioned parallel to each other and spaced apart vertically, while the first lateral frame 26a and the second lateral frame 26b are positioned parallel to each other and spaced apart horizontally. In these window frames 12a and 12b, the upper and lower frames 24 and 25 and the first and second lateral frames 26a and 26b 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 24, 25 and the first and second lateral frames 26a, 26b are formed in a substantially angle shape (L-shape). The upper frame 24 has an upper frame plate 27 that extends laterally and is located directly above the free ends 37 of the window bodies 13a, 13b, and an upper contact plate 28 that extends laterally perpendicular to the upper frame plate 27 and airtightly contacts the rear surfaces of the free ends 37 of the window bodies 13a, 13b. The lower frame 25 has a lower frame plate 29 that extends laterally and is located directly below the rotating ends 36 of the window bodies 13a, 13b, and a lower contact plate 30 that extends laterally perpendicular to the lower frame plate 29 and airtightly contacts the rear surfaces of the rotating ends 36 of the window bodies 13a, 13b.

[0034] The first lateral frame 26a has a first lateral frame plate 31 that is located laterally to the first lateral portion 38a of the window body 13a, 13b and extends vertically, and a first contact plate 32 that extends vertically perpendicular to the first lateral frame plate 31 and airtightly abuts against the rear surface of the first lateral portion 38a of the window body 13a, 13b. The second lateral frame 26b has a second lateral frame plate 33 that is located laterally to the second lateral portion 38b of the window body 13a, 13b and extends vertically, and a second contact plate 34 that extends vertically perpendicular to the second lateral frame plate 33 and airtightly abuts against the rear surface of the second lateral portion 38b 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 fixture 35 is installed, in which glass (glass sashes) is fitted into the window frame. The window frames 12a and 12b and the window fixture 35 are connected by existing connection means. In some cases, 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 36 (rotating frame) that is rotatably connected (installed) to the lower frame 25 of the window frames 12a, 12b and extends straight in the lateral direction, a free end 37 (swivel frame) that extends straight in the lateral direction, spaced apart upward from the rotating end 36, and a first side part 38a (first lateral frame 38a) and a second side part 38b (second lateral frame 38b) that extend straight in the vertical direction, spaced apart horizontally from each other. A sash fitting 39 is installed and fixed to the lateral center of the free end 37.

[0038] The rotating end 36 is airtightly in contact with the lower contact plate 30 of the lower frame 25 when the window bodies 13a and 13b are closed (closed position), and the first and second side portions 38a and 38b are airtightly in contact with the first and second contact plates 32 and 34 of the first and second side frames 26a and 26b when the window bodies 13a and 13b are closed. The free end 37 rotates to a closed position where it is airtightly in contact with the upper contact plate 28 of the upper frame 24 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 36, free end 37, and first and second side portions 38a and 38b). The rotating end 36, free end 37, and first and second side portions 38a and 38b are made from resin sashes, aluminum sashes, or aluminum-resin composite sashes.

[0039] The first kick spring 14a (kick mechanism) is installed on the first side portion 38a of the window body 13a, 13b and extends vertically. The second kick spring 14b (kick mechanism) is installed on the second side portion 38b of the window body 13a, 13b and extends vertically. The upper ends 40 of the kick springs 14a, 14b are connected to the upper ends of the first and second side portions 38a, 38b by predetermined connecting means. The kick springs 14a, 14b are inclined downwards toward the rear in the front-rear direction so that they gradually move away from the first and second side portions 38a, 38b from their upper ends 40 toward their lower ends 41. The lower ends 41 of the kick springs 14a, 14b may also be connected to the lower ends of the first and second side portions 38a, 38b by predetermined connecting means. In this case, the kick springs 14a and 14b are inclined in an upward slope towards the rear in the front-rear direction, so as they move from their lower end 41 towards their upper end 40, they gradually move away from the first and second side portions 38a and 38b.

[0040] When the window bodies 13a and 13b are closed, the kick springs 14a and 14b are in close contact with the first and second contact plates 32 and 34 of the first and second lateral frames 26a and 26b, and the repulsive force of the kick springs 14a and 14b acts on the first and second contact plates 32 and 34. Due to their repulsive force, the kick springs 14a and 14b impart a pivoting force to the free ends 37 of the window bodies 13a and 13b during the initial movement when the free ends 37 of the window bodies 13a and 13b pivot from the closed position to the open position.

[0041] The first kick spring 14a (kick mechanism) may be installed on the first contact plate 32 of the first lateral frame 26a of the first and second window frames 12a, 12b and extend in the vertical direction, or the second kick spring 14b (kick mechanism) may be installed on the second contact plate 34 of the second lateral frame 26b of the first and second window frames 12a, 12b and extend in the vertical direction. In this case, the upper ends 40 of the kick springs 14a, 14b are connected to the upper ends of the first and second contact plates 32, 34 by predetermined connecting means, and the kick springs incline downward in the front-rear direction so that they gradually move away from the first and second contact plates 32, 34 of the first and second lateral frames 26a, 26b as they move from their upper ends 40 to their lower ends 41. Alternatively, the lower ends 41 of the kick springs 14a and 14b are connected to the lower ends of the first and second contact plates 32 and 34 by predetermined connecting means, and the kick springs incline upward in the front-rear direction so that they gradually move away from the first and second contact plates 32 and 34 of the first and second lateral frames 26a and 26b as they move from their lower ends 41 toward their upper ends 40.

[0042] When the window bodies 13a and 13b are closed, the kick springs 14a and 14b are in close contact with the first and second sides 38a and 38b of the window bodies 13a and 13b, and the repulsive force of the kick springs 14a and 14b acts on the first and second sides 38a and 38b. Similar to when the kick springs 14a and 14b are installed on the first and second sides 38a and 38b, the repulsive force of these kick springs (kick means) imparts a rotational force to the free end 37 of the window body 13a and 13b during the initial rotation of the free end 37.

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

[0044] In the window opening and closing system 10, the first and second wires 15a and 15b extend in one direction (forward in the front-rear direction), causing the free ends 37 of the first and second window bodies 13a and 13b, which are airtightly attached to the upper frame 24, to pivot downward in the vertical direction around the rotating end 36, and the window bodies 13a and 13b to pivot from a closed state (closed position) to an open state (fully open position) (see Figure 13). The angle of downward pivot of the window bodies 13a and 13b differs depending on the extension length of the first and second wires 15a and 15b, and the opening area of ​​the window bodies 13a and 13b when open can be adjusted by adjusting the extension length of the wires 15a and 15b. In the window opening and closing system 10, the first and second wires 15a and 15b are pulled in opposite directions (rearward in the front-rear direction), causing the free ends 37 of the first and second window bodies 13a and 13b, which have swung downward in the vertical direction, to swivel upward in the vertical direction around the rotating end 36, and the window bodies 13a and 13b swivel from the open state (fully open position) to the closed state (closed position) (see Figure 11).

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

[0046] The erection unit 16 is made of a metal such as aluminum, stainless steel, or other alloys, or a synthetic resin, and extends straight downward from the second lateral frame 26b of the first window frame 12a. Alternatively, the erection unit 16 may extend straight downward from the first lateral frame 26a of the first window frame 12a, or from the first lateral frame 26a of the second window frame 12b. Furthermore, the erection unit 17 may extend straight downward from the second lateral frame 26b of the second window frame 12b.

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

[0048] In the erection unit 16, the first and second erection plates 42, 43 and the base plate 44 are integrally molded, and their cross-sectional shape is formed in a U-shape. The erection unit 16 defines a vertically elongated storage space 48 surrounded by these plates 42-44. In the erection unit 16, a cover plate 45 is detachably installed on the first and second erection plates 42, 43 that extend upward from the upper end 61 of the guideline 19, and covers the storage space 48 of the erection unit 16. In the erection unit 16, the first erection plate 42 is connected and fixed to the second lateral frame 26a of the first window frame 12a and the window frame of the window equipment 35 by predetermined connecting means (brackets, bolts and nuts, rivets, welding, etc.).

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

[0050] The second chain storage space 47 (second guide recess) is formed from a third guide plate 52 that extends vertically adjacent to the second erection plate 43, a fourth guide plate 53 that extends vertically spaced apart from the third guide plate 52 toward the first erection plate 42, and a second guide base plate 54 that extends vertically and is located between the third and fourth guide plates 52 and 53.

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

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

[0053] In the first and second drive units 17a and 17b, the first to third plates 56 to 58 are integrally molded, and their cross-sectional shape is formed in a U-shape. These drive units 17a and 17b define first and second storage spaces 60a and 60b that are elongated laterally and surrounded by the first to third plates 56 to 58. In the first and second drive units 17a and 17b, the first plate 56 is connected and fixed to the upper frame 24 of the window frames 12a and 12b by predetermined connecting means (brackets, bolts and nuts, rivets, welding, etc.).

[0054] The guideline 19 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 26b that forms the first window frame 12a. Alternatively, the guideline 19 may extend downward from the second lateral frame 26b of the second window frame 12b, or from the first lateral frame 26a of the first window frame 12a or the second window frame 12b. The vertical length dimension of the guideline 19 can be arbitrarily adjusted (changed) and set to a height that makes it easy to move the slider 20 up and down (a height that makes it easy to move the slider 20 up and down with little force). The guideline 19 has an upper end 61 (lower end of cover plate 45) located on the side of the window bodies 13a, 13b, a lower end 63 located on the ground side, and an intermediate part 62 (movement space) that extends vertically between the upper end 61 and the lower end 63.

[0055] The slider 20 is made of a metal such as aluminum, stainless steel, or other alloys, and consists of an upper plate 64 which is formed into a roughly elongated plate shape in the vertical direction, and a lower plate 65 which is also formed into a roughly elongated plate shape in the vertical direction and is located below the upper plate 64. The slider 20 is positioned in the middle section 62 (movement space) of the guideline 19, and by sliding vertically through the first chain storage space 46 (first guide recess), the middle section 62 (the vertically central area of ​​the erection unit 16) slides upward in the vertical direction from the lower end 63 to the upper end 61 of the guideline 19, and also slides downward in the vertical direction from the upper end 61 to the lower end 63 of the guideline 19.

[0056] One end 66 of the traction chain 22 is connected to the upper end of the upper plate 64. A first connecting portion 67 extending in the front-rear direction perpendicular to the plate 64 is integrally molded at the lower end of the upper plate 64. A second connecting portion 68 extending in the front-rear direction perpendicular to the plate 65 and facing the first connecting portion 67 is integrally molded at the upper end of the lower plate 65. Screw holes 69 (screw holes) for screwing in the threaded portion of the adjustment screw described later are formed in the first and second connecting portions 67 and 68.

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

[0058] For example, by rotating the adjustment screw 70 clockwise (forward direction), the first connecting part 67 and the second connecting part 68 gradually move closer together, shortening the vertical distance between the upper plate 64 and the lower plate 65. Conversely, by rotating the adjustment screw 70 counterclockwise (reverse direction), the first connecting part 67 and the second connecting part 68 gradually move further apart, lengthening the vertical distance between the upper plate 64 and the lower plate 65.

[0059] Although not shown in the diagram, a sliding piece (not shown) may be fixed to the underside of the slider 20. In this case, the sliding piece is slidably inserted (engaged) into the first chain storage space 46 (first guide recess) of the erection unit 16, and the slider 20 is positioned in the intermediate part 62 (movement space) of the guideline 19. As the sliding piece slides vertically within the first chain storage space 46, the slider 20 slides vertically upward through the intermediate part 62 (the vertically central area of ​​the erection unit 16) from the lower end 63 to the upper end 61 of the guideline 19, and the slider 20 slides vertically downward through the intermediate part 62 from the upper end 61 to the lower end 63 of the guideline 17.

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

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

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

[0063] The swivel lever 73 is installed at the lower end of the lower plate 65 of the slider 20 and is formed from a rotating base end 76 and a gripping part 77 (handle). The rotating base end 76 is rotatably attached to the lower end of the lower plate 65. The swivel lever 73 rotates (swivels) around the rotating base end 76, with the gripping part 77 rotating in the direction of rotation (front-back direction) (clockwise or counterclockwise direction) of the window body 13a. A swivel arm 78 is integrally molded (connected) to the side of the gripping part 77 (handle) that extends laterally (outward) from its side edge. An engagement pin 79 is formed on the swivel arm 78, which protrudes toward the base plate 44 of the erection unit 16. The engagement pin 79 engages with the engagement cam 72 in a detachable manner.

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

[0065] The engaging pin 79 rotates (turns) along with the swivel arm 78 in the direction of rotation (front-to-back direction) (clockwise or counterclockwise direction) of the window body 13a as the gripping part 77 (swivel lever 73) rotates (turns). On the swivel lever 73, the engaging pin 79 moves slidably along the outer peripheral edge 75 of the engaging cam 72. While pressing the gripping part 77 (swivel lever 73) downward in the vertical direction and applying a swivel force to the gripping part 77 (handle), the engaging pin 79 can slide (overcome) the outer peripheral edge 75 of the engaging cam 72 in one direction, and can also slide (overcome) the outer peripheral edge 75 of the engaging cam 72 in the other direction. The engaging pin 79 engages with the engaging cam 72 when the outer peripheral edge 75 of the engaging cam 72 has been moved (overcome) in one direction.

[0066] In the window opening and closing system 10, the position of the engagement pin 79 relative to the outer edge 74 of the engagement cam 72 is adjusted so that the engagement pin 79 can slide (over) the outer edge 75 in one direction or the other. By rotating the adjustment screw 70 of the slider 20 counterclockwise (reverse direction) and increasing the vertical separation between the upper plate 64 and the lower plate 65, the tension force acting on the traction chain 22 can be reduced, while allowing the engagement pin 79 of the swivel lever 73 to easily slide (over) the outer edge 75 of the engagement cam 72 in one direction or the other. By rotating the adjustment screw 70 of the slider 20 clockwise (forward direction) and shortening the vertical separation between the upper plate 64 and the lower plate 65, the tension force acting on the traction chain 22 can be increased, but on the other hand, force is required for the engagement pin 79 of the swivel lever 73 to slide (over) the outer edge 75 of the engagement cam 72 in one direction or the other. By adjusting the vertical distance between the upper plate 64 and the lower plate 65, the tension force applied to the traction chain 22 can be increased or decreased. This allows for adjustment of the degree of contact between the free ends 37 of the first and second window bodies 13a and 13b and the upper contact plate 28 when they are closed, thereby adjusting the airtightness of the window opening and closing system 10 when it is closed.

[0067] In the window opening and closing system 10, by adjusting the vertical separation between the upper plate 64 and the lower plate 65 using the adjustment screw 70, the optimal tension force can be applied to the traction chain 22 when locking the slider 20's slide (up and down movement), and the engagement pin 79 of the swivel lever 73 can slide (over) the outer edge 75 of the engagement cam 72 with appropriate force in one direction or the other.

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

[0069] When the slider 20 slides the intermediate section 62 (the vertically central area of ​​the erection unit 16) upward from the lower end 63 to the upper end 61 of the guideline 19, one end 66 of the towing chain 22 moves upward in conjunction with it, causing the entire towing chain 22 to operate in the vertical direction. When the slider 20 slides the intermediate section 62 downward from the upper end 61 to the lower end 63 of the guideline 19, one end 66 of the towing chain 22 moves downward in conjunction with it, causing the entire towing chain 22 to operate in the vertical direction.

[0070] The first and second rotating mechanisms 23a and 23b are linked to the vertical movement of the traction chain 22 caused by the vertical sliding of the slider 20, and they extend the first and second wires 15a and 15b 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 23a is formed from a first rod 82a, a sprocket 83, a first roller 84a, a first ring mounting drum 85a, and a first torsion spring 86a. The first rod 82a, sprocket 83, first roller 84a, first ring mounting drum 85a, and first torsion spring 86a are installed (housed) in the first housing space 60a of the first drive unit 17a.

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

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

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

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

[0075] The outer diameter of the sprocket 83 is adjustable. Under the condition that the peripheral speed of the sprocket 83 (the speed of the slider 20) remains the same, increasing the outer diameter of the sprocket 83 increases the ratio of the diameter of the sprocket 83 to the diameters of the first and second rods 82a and 82b. 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 82a and 82b 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 83 increases the vertical movement dimension of the slider 20. Conversely, by reducing the outer diameter of the sprocket 83, the ratio of the diameter of the sprocket 83 to the diameters of the first and second rods 82a and 82b 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 20.

[0076] The window opening and closing system 10 increases the vertical movement of the slider 20 between the closed and open states of the first and second window bodies 13a and 13b by increasing the outer diameter of the sprocket 83. However, the slider 20 can be slid upward and downward without requiring much force, allowing the window bodies 13a and 13b to be easily rotated from the closed state to the open state, and also allowing the window bodies 13a and 13b to be easily rotated from the open state to the closed state.

[0077] The window opening and closing system 10 requires force to slide the slider 20 upward or downward in the vertical direction by reducing the outer diameter of the sprocket 83. However, the vertical movement dimension (slide distance) of the slider 20 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 20 a short distance.

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

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

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

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

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

[0083] The first and second torsion springs 86a and 86b are made from hard steel wire, stainless steel wire, or spring phosphor bronze. The first torsion spring 86a is attached to the first ring mounting drum 85a and extends axially along the first rod 82a. The second torsion spring 86b is attached to the second ring mounting drum 85b and extends axially along the second rod 82b. The arm shapes of these torsion springs 86a and 86b can be short hooks, straight, or single-bend designs. The outer diameter, inner diameter, and number of turns of these torsion springs 86a and 86b 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 20 in the vertical direction).

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

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

[0086] The first and second torsion springs 86a and 86b twist in the winding direction or in the opposite direction to the winding direction when the first and second rods 82a and 82b rotate clockwise and the first and second wires 15a and 15b are fed out in one direction (forward in the front-rear direction) from the first and second rollers 84a and 84b. When the first and second torsion springs 86a and 86b 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 (rebound force) of the first and second torsion springs 86a and 86b is adjusted so that the load acting on the slider 20 when the window bodies 13a and 13b are swung from the bottom to the top in the vertical direction is about 1.5 to 2 kg.

[0087] 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 window opening / closing system 10 similar to Figure 11, shown in cross-section. 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 window opening / closing system 10 similar to Figure 13, shown in cross-section. In Figures 12 and 14, the traction chain 22 (traction member) is shown exposed.

[0088] An example of the procedure for opening the first and second window bodies 13a and 13b by rotating the free ends 37 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 wires 15a and 15b are pulled (wound) in the opposite direction (rearward in the front-rear direction) by the first and second rollers 84a and 84b, the free ends 37 of the window bodies 13a and 13b rotate to the closed position, the rotating end 36 is airtightly attached to the lower frame 25, the first and second side parts 38a and 38b are airtightly attached to the first and second side frames 26a and 26b, and the free end 37 is airtightly attached to the upper frame 24.

[0089] Furthermore, with the slider 20 positioned at the lower end 63 of the guideline 19, the engagement pin 79 of the swivel lever 73 slides (overcomes) the outer peripheral edge 75 of the engagement cam 72 in one direction, causing the engagement pin 79 to move to the locked position, and tension is applied to the traction chain 22, locking the slider 20's sliding (up and down movement). When the slider 20's sliding is locked, as shown in Figure 7, the swivel lever 73 hangs downward in the vertical direction from the lower end 63 of the guideline 19.

[0090] First, while gripping the gripping portion 77 (handle) of the swivel lever 73, the swivel lever 73 is pressed downwards in the vertical direction, and a swivel force is applied to the gripping portion 77 of the swivel lever 73 in a counterclockwise direction (opposite direction). By applying a swivel force to the gripping portion 77, the swivel arm 78 and the engagement pin 79 swivel in a counterclockwise direction (opposite direction), and the engagement pin 79 slides (overcomes) the outer edge 75 of the engagement cam 72 in another direction, moving the engagement pin 79 to the unlocked position, and the engagement between the engagement pin 79 and the engagement cam 72 is released. When the engagement pin 79 is moved to the unlocked position, the sliding (up and down movement) of the slider 20 is unlocked, and the tension force acting on the traction chain 22 is released.

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

[0092] The extension dimension of the swivel arm 78 and the positional relationship between the engaging cam 72 and the engaging pin 79 are adjusted so that the lock is released when the swivel lever 73 (gripping part 77) is rotated 15 to 20° counterclockwise (in the opposite direction) from the state shown in Figure 7, where it hangs down from the lower end 63 of the guideline 19. Furthermore, the extension dimension of the swivel arm 78 is adjusted so that when it is rotated 15 to 20° counterclockwise (in the opposite direction), the tip 80 of the swivel arm 78 contacts the inner surface of the second erection plate 43 of the erection unit 16.

[0093] Next, while gripping the gripping portion 77 (handle) of the swivel lever 73, slide the slider 20 upward in the vertical direction from the lower end 63 to the upper end 61 of the guideline 19 together with the swivel lever 73 (push it up). When the slider 20 is slid upward in the vertical direction, the traction chain 22 located in the first chain housing portion 46 moves upward in conjunction with the sliding of the slider 20, and the sprocket 83 that engages with the traction chain 22 rotates clockwise. When the sprocket 83 rotates, the first and second rods 82a, 82b (rotating mechanisms 23a, 23b) rotate clockwise in conjunction with it, and the first and second rollers 84a, 84b rotate clockwise in conjunction with the rotation of the first and second rods 82a, 82b. As the first and second rollers 84a and 84b rotate clockwise, the first and second wires 15a and 15b are fed out from the first and second rollers 84a and 84b in one direction (forward in the front-back direction), as shown in Figures 13 and 14.

[0094] During the initial movement (start of rotation) when the first and second window bodies 13a and 13b are rotated from a closed state to an open state, the repulsive force of the first and second kick springs 14a and 14b (kick means) installed on the first and second side portions 38a and 38b of the window bodies 13a and 13b acts on the free ends 37 of the window bodies 13a and 13b. The repulsive force (kick force) of these kick springs 14a and 14b pushes (pushes out) the free ends 37 of the first and second window bodies 13a and 13b forward in the front-rear direction, and a downward rotational force is applied to the free ends 37 of the window bodies 13a and 13b in the up-down direction.

[0095] Furthermore, when the first kick spring 14a (kick means) is installed on the first contact plate 32 of the first lateral frame 26a of the first and second window frames 12a, 12b and the second kick spring 14b (kick means) is installed on the second contact plate 34 of the second lateral frame 26b of the first and second window frames 12a, 12b, the repulsive force of these kick springs 14a, 14b (kick means) acts on the free ends 37 of the window bodies 13a, 13b, and the repulsive force (kick force) of the kick springs 14a, 14b pushes (pushes out) the free ends 37 of the first and second window bodies 13a, 13b forward in the front-rear direction, and a pivoting force is applied to the free ends 37 of the window bodies 13a, 13b in the up-down direction.

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

[0097] As the free ends 37 of the first and second window bodies 13a and 13b automatically pivot downward in the vertical direction, the first and second wires 15a and 15b are automatically extended in one direction (forward in the front-rear direction), the first and second rods 82a and 82b (rotating mechanisms 23a and 23b) automatically rotate clockwise, and the sprocket 83 also automatically rotates clockwise. Furthermore, the towing chain 22 automatically moves upward, and the slider 20 automatically slides upward toward the upper end 61 of the guideline 19.

[0098] When the first wire 14a is fed out in one direction (forward in the front-rear direction) from the first roller 84a and the first rod 82a (first ring mounting drum 85a) 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 86a as the twisting base. When the second wire 14b is fed out in one direction (forward in the front-rear direction) from the second roller 84b and the second rod 84b (second ring mounting drum 85b) 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 second torsion spring 86b as the twisting base.

[0099] When the first and second torsion springs 86a and 86b 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 86a and 86b imparts a pivoting force to the free ends 37 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.

[0100] The window opening and closing system 10 operates the traction chain 22 (traction member) upwards by sliding the slider 20 from the lower end 63 to the upper end 61 of the guideline 19, through the intermediate section 62 (the vertical central area of ​​the erection unit 16), and the upward movement of the traction chain 22 rotates the sprocket 83 (rotating mechanism 23a, 23b), which feeds out the first and second wires 15a, 15b from the first and second rollers 84a, 84b, and rotates the first and second window bodies 13a, 13b from the closed state to the open state. Therefore, the window bodies 13a, 13b can be rotated from the closed state to the open state simply by sliding the slider 20 upwards and downwards, and the first and second window bodies 13a, 13b can be smoothly rotated from the closed state to the open state and easily opened without requiring much effort or time.

[0101] The window opening and closing system 10 utilizes the repulsive force (extending force) of the first and second kick springs 14a and 14b (kick means) to rotate the free ends 37 of the first and second window bodies 13a and 13b from the closed position to the open position during the initial rotation. In the rotation process, excluding the initial rotation, the free ends 37 of the window bodies 13a and 13b automatically rotate downward in the vertical direction due to the weight of the window bodies 13a and 13b. Therefore, by utilizing the repulsive force of the first and second kick springs 14a and 14b, the window bodies 13a and 13b can be reliably rotated during the initial rotation when the slider 20 is slid upward in the vertical direction. This allows the window bodies 13a and 13b to be smoothly rotated from the closed state to the open state by the upward sliding operation of the slider 20, making it easy to open the window bodies 13a and 13b. In the window opening and closing system 10, the free ends 37 of the window bodies 13a and 13b pivot due to the repulsive force (extending force) of the first and second kicking springs 14a and 14b (kicking means) at the start of the movement, and during the pivoting process, excluding the initial movement, the free ends 37 of the first and second window bodies 13a and 13b automatically pivot downward in the vertical direction due to their own weight, 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.

[0102] The window opening and closing system 10 is unlocked when the gripping part 77 (swivel lever 73) is rotated counterclockwise (either forward or reverse) while the slider 20 is locked, moving the engagement pin 79 to the unlocked position where it slides over the outer peripheral edge 75 of the engagement cam 72. This allows the lock on the slider 20 to be easily released from its locked state, and the first and second window bodies 13a and 13b to be easily opened.

[0103] The window opening and closing system 10 can be unlocked by rotating the gripping part 77 (swivel lever 73) 15 to 20 degrees from the locked state of the slider 20. Therefore, the lock can be easily and quickly released without having to rotate the gripping part 77 (swivel lever 73) a large distance (for example, 90 degrees) from the locked state of the slider 20.

[0104] An example of the procedure for closing the first and second window bodies 13a and 13b by rotating the free ends 37 of the window bodies 13a and 13b upward in the vertical direction, starting from an open state, is as follows: While gripping the handle 77 of the pivot lever 73, slide the slider 20 downward in the vertical direction from the upper end 61 to the lower end 63 of the guideline 19 together with the pivot lever 73 (push down). Note that the load (kg) acting on the slider 20 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 86a and 86b.

[0105] When the slider 20 is slid downward, the towing chain 22 moves downward in the vertical direction in conjunction with the sliding of the slider 20, and the sprocket 83 that engages with the towing chain 22 rotates counterclockwise. As the sprocket 83 rotates, the first and second rods 82a, 82b (rotating mechanisms 23a, 23b) rotate counterclockwise in conjunction with it, and the first and second wires 15a, 15b are wound onto the first and second rollers 85a, 84b in the opposite direction (rearward in the front-rear direction).

[0106] As the first and second wires 15a and 15b are wound onto the first and second rollers 84a and 84b, the free ends 37 of the first and second window bodies 13a and 13b begin to pivot upward in the vertical direction from the open position to the closed position. Because the torque of the first and second torsion springs 86a and 86b imparts a pivoting force to the free ends 37 of the first and second window bodies 13a and 13b that causes them to pivot from the open position to the closed position, the entire weight of the window bodies 13a and 13b does not act on the slider 20. Instead, a load (in the range of 1.5 to 2 kg) is applied to the slider 20, which is the weight of the window bodies 13a and 13b minus the repulsive force of the torsion springs 86a and 86b.

[0107] By sliding (pushing down) the slider 20 to the lower end 63 of the guideline 19, the first and second window bodies 13a and 13b pivot 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 86a and 86b is released, and the torque of these torsion springs 86a and 86b becomes zero. Furthermore, before the free ends 37 of the window bodies 13a and 13b pivot to the closed position, the free ends 37 are pivoted upward in the vertical direction against the repulsive force of the kick springs 14a and 14b, and the first and second window bodies 13a and 13b are closed while the repulsive force of the kick springs 14a and 14b is acting on the free ends 37. After sliding the slider 20 to the lower end 63 of the guideline 19, while gripping the gripping portion 77 of the swivel lever 73, apply a swivel force to the gripping portion 77 in a clockwise direction (forward direction) while pressing the swivel lever 73 downward in the vertical direction.

[0108] By applying a rotational force to the gripping portion 77 and rotating the rotation lever 73 15-20° clockwise (forward direction), the engagement pin 79 rotates clockwise (forward direction), and as the engagement pin 79 slides (overcomes) the outer edge 75 of the engagement cam 72 in one direction, the engagement pin 79 moves to the locked position, and the engagement pin 79 engages with the engagement cam 72. When the engagement pin 79 is moved to the locked position, the rotation lever 73 hangs down from the lower end 63 of the guideline 18, tension is applied to the traction chain 22, and the sliding (up and down movement) of the slider 20 is locked. As the engaging pin 79 moves to the locked position and tension is applied to the traction chain 22, the rotating end 36 becomes airtight against the lower frame 25, the first and second side portions 38a and 38b become airtight against the first and second side frames 26a and 26b, and the free end 37 becomes airtight against the upper frame 24.

[0109] The window opening and closing system 10 operates the traction chain 22 (traction member) downward in the vertical direction by sliding the slider 20 downward from the upper end 61 of the guideline 19. The downward movement of the traction chain 22 rotates the sprocket 83 (rotating mechanism 23a, 23b), winding the first and second wires 15a, 15b onto the first and second rollers 84a, 84b, and rotating the first and second window bodies 13a, 13b from the open state to the closed state. Therefore, the window bodies 13a, 13b can be rotated from the open state to the closed state simply by sliding the slider 20 downward in the vertical direction, and the first and second window bodies 13a, 13b can be smoothly rotated from the open state to the closed state and easily closed without requiring any effort or time. The window opening and closing system 10 eliminates the need to rotate the winding handle multiple times when closing the open window bodies 13a and 13b, as in conventional technology. Instead, it only requires sliding the slider 20 downwards in the vertical direction, allowing the open window bodies 13a and 13b to be closed quickly with a simple sliding operation.

[0110] The window opening and closing system 10 rotates the gripping portion 77 of the pivot lever 73 clockwise (forward direction) at the lower end 63 of the guideline 19, moving the engagement pin 79 of the pivot lever 69 to a locked position where it slides over the outer peripheral edge 75 of the engagement cam 72, thereby applying tension to the traction chain 22 and locking the sliding (up and down movement) of the slider 20. By moving the engagement pin 79 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 will not be left in an incompletely closed state, ensuring that the window bodies 13a and 13b are closed completely, reliably and airtightly.

[0111] The window opening and closing system 10 locks the slider 20 while tension is applied to the traction chain 22, so the traction chain 22 does not loosen, and the first and second window bodies 13a and 13b can be closed airtightly, preventing (blocking) the flow of air when the window bodies 13a and 13b are closed. The window opening and closing system 10 can lock the slider 20 by rotating the gripping part 77 of the swivel lever 73 by 15 to 20° from the unlocked state of the slider 20, so the slider 20 can be locked easily and quickly without having to rotate the gripping part 77 of the swivel lever 73 by a large amount (for example, 90°) from the unlocked state of the slider 20.

[0112] 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 86a and 86b, considerable force is required to slide the slider 20 downward in the vertical direction due to the weight of the window bodies 13a and 13b. However, in the window opening and closing system 10, the torque of the torsion springs 86a and 86b facilitates the winding of the first and second wires 15a and 15b onto the first and second rollers 84a and 84b, thereby moving the window bodies 13a and 13b upward. The torque of the torsion springs 86a and 86b is adjusted so that the load acting on the slider 20 when it is swung from downward to upward is approximately 1.5 to 2 kg. By utilizing these torsion springs 86a and 86b, the slider 20 can be slid downward in the vertical direction without requiring a large force, and the first and second window bodies 86a and 86b can be smoothly swung from the open state to the closed state, making it easy to close the window bodies 86a and 86b.

[0113] Figure 15 is a side view of another example of erection unit 16, and Figure 16 is a side view of erection unit 16 showing the slider 20 in contact with the stopper 87. Figure 17 is a partially enlarged view of erection unit 16 showing the slider 2- fixed to a predetermined location on the guideline 19 by a set screw 88, and Figure 18 is a cross-sectional view taken along line AA in Figure 17. The difference between the erection unit 16 shown in Figures 15 to 18 and that in Figure 4 is that a stopper 87 is installed at a predetermined location on the guideline 19 of the erection unit 16, and a set screw 88 (fixing means) is installed on the slider 20.

[0114] The other components of the window opening / closing system 11 equipped with the erection unit 16 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 16 is the same as that in Figure 4, the explanation of the configuration of the erection unit 16 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 16.

[0115] A stopper 87 is detachably attached to the guideline 19 of the erection unit 16. The stopper 87 is installed at a predetermined location (base plate 44 or connecting plate 55) in the intermediate section 62 (movement space) of the guideline 19 by a predetermined connecting means. The upper end of the upper plate 64 of the slider 20, which slides upward in the vertical direction, comes into contact with the stopper 87. When the upper end of the upper plate 64 comes into contact with the stopper 87, the slider 20 stops sliding any further upward.

[0116] The installation position of the stopper 87 in the intermediate section 62 (movement space) of the guideline 19 can be determined arbitrarily. By adjusting the installation position of the stopper 87 in the intermediate section 62 of the guideline 19, the vertical movement distance (slide distance) of the slider 20 in the guideline 19 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.

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

[0118] When the slider 20 comes into contact with the stopper 87 and the extension of the wires 15a and 15b stops, the downward rotation of the free ends 37 of the first and second window bodies 13a and 13b in the vertical direction stops. Depending on the installation position of the stopper 87 in the intermediate part 62 (movement space) of the guideline 19, the downward rotation angle of the first and second window bodies 13a and 13b in the vertical direction differs, and the opening area when the window bodies 13a and 13b are open differs.

[0119] The set screw 88 (fixing means) is made of a metal such as aluminum, stainless steel, or other alloys, or a synthetic resin, and is formed from an operating part 89 (head), a screw part 90, and a slide-stopping roller 91. In the set screw 88, the top of the screw part 90 is fixed to the operating part 89, and the slide-stopping roller 91 is inserted through and fixed to the bottom of the screw part 90. The screw part 90 is screwed into a screw hole (threaded hole) formed in the upper plate 64 of the slider 20. When the operating part 89 of the set screw 88 is rotated clockwise (forward), the screw part moves forward toward the connecting plate 55 (base plate 44) of the erection unit 16, and when the operating part 89 of the set screw 88 is rotated counterclockwise (reverse), the screw part moves backward toward the connecting plate 55 (base plate 44) of the erection unit 16.

[0120] To use the set screw 88, while gripping the swivel lever 73, the slider 20 is gradually slid upward in the vertical direction from the lower end 63 to the upper end 61 of the guideline 19, and the slider 20 is stopped at a predetermined point on the guideline 19. At the point when the slider 20 is stopped, the operating part 89 (head) of the set screw 88 is rotated counterclockwise (in the opposite direction), and the screw part 90 is retracted so as to move away from the connecting plate 55 (base plate 44) of the erection unit 16. When the screw part 90 is retracted, the tapered part of the slide-stopping roller 91 attached to the screw part 90 presses against the projections that protrude inward from the inner surfaces of the second and third guide plates 50 and 52, and at that point the slider 20 is fixed to the erection unit 15. When the slider 20 is fixed to the erection unit 15, further upward sliding of the slider 20 is prevented, and the unwinding of the first and second wires 15a and 15b in one direction (forward in the front-rear direction) is stopped.

[0121] When the tapered portion of the slide-stopping roller 91 of the set screw 88 presses against the projections on the inner surfaces of the second and third guide plates 50 and 52, and the wires 15a and 15b stop being fed out, the downward rotation of the free ends 37 of the first and second window bodies 13a and 13b in the vertical direction stops. Depending on the fixing position of the slider 20 in the guideline 19 using the set screw 88, the downward rotation 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.

[0122] After fixing the slider 20 to the connecting plate 55 with the set screw 88, to release the slider 20, the operating part 89 of the set screw 88 is rotated clockwise (forward direction), and the screw part 90 is advanced toward the connecting plate 55 (base plate 44). When the screw part 90 is advanced, the tapered part of the slide stop roller 91 separates from the projections on the inner surfaces of the second and third guide plates 50 and 52, releasing the pressure of the tapered part of the slide stop roller 91 on the projections on the inner surfaces of the second and third guide plates 50 and 52, thus releasing the slider 20 and allowing it to slide vertically.

[0123] The window opening and closing system 11 allows adjustment of the upward movement distance (slide distance) of the slider 20 from the lower end 63 of the guideline 19 by adjusting the installation position of the stopper 87 on the guideline 19, and the downward rotation angle of the rotating ends 36 of the first and second window bodies 13a and 13b from the upper frame 24 can be adjusted. Therefore, the opening area of ​​the window bodies 13a and 13b when open can be adjusted by the stopper 87, and the airflow rate of the air passing through the window bodies 13a and 13b can be adjusted.

[0124] The window opening and closing system 11 allows the free ends 37 of the window bodies 13a and 13b to be rotated downward from the upper frame 24 at any angle by fixing the slider 20 at a predetermined location on the guideline 19 using the set screws 88 (fixing means). This allows the opening area of ​​the window bodies 13a and 13b when open to be adjusted using the set screws 88, and thus the amount of airflow through the window bodies 13a and 13b can be adjusted. [Explanation of symbols]

[0125] 10 Window opening and closing system 11 Window opening and closing system 12a First window frame 12b Second Window Frame 13a First window body (first shoji screen) 13b Second window main body (second shoji screen) 14a First kicking spring 14b Second kicking spring 15a First wire 15b Second wire 16 Erection Unit 17a First drive unit 17b Second drive unit 18 Chain Actuator 19 Guidelines 20 Sliders 21 Locking mechanism 22. Towing chain (towing component) 23a First rotation mechanism 23b Second rotation mechanism 24 Upper frame 25 Lower frame 26a First side frame 26b Second lateral frame 27 Upper frame plate 28 Upper contact plate 29. Bottom frame plate 30 Lower contact plate 31. First side frame plate 32 First contact plate 33. Second side frame plate 34. Second contact plate 35 Window equipment 36. Rotating end (rotating frame) 37. Free end (swivel frame) 38a First side section (first side frame) 38b Second side section (second side frame) 39 Shoji hardware 40 Upper end 41 Lower end 42 First erection plate 43. Second erection plate 44 Base Plate 45 Cover Plate 46. ​​First chain storage space (first guide recess) 47. Second chain storage space (second guide recess) 48 storage spaces 49. First guide plate 50. Second guide plate 51. First guide base plate 52 Third Guide Plate 53. Fourth guide plate 54. Second guide base plate 55 Connecting Plates 56 Plate 1 57. Second Plate 58 Third Plate 59 Bearing plate 60a First containment space 60b Second containment space 61 Upper end 62. Intermediate section (movement space) 63 Bottom end 64 Top plate 65 Lower plate 66 One end 67 1st connection part 68 2nd connection part 69 Screw hole (threaded hole) 70 Adjustment screws 71 Screw part 72 Engagement Cam 73. Swivel lever (swivel handle) 75 Outer edge 76 Rotating base 77. Grip (handle) 78 Swivel Arm 79 Engagement pin 80 Tip 81 Other end (free end) 82a First Rod 82b Second Rod 83 sprocket 84a First Roller 84b Second Roller 85a First Ring Mounting Drum 85b Second Ring Mounting Drum 86a First Torsion Spring 86b Second Torsion Spring 87 Stopper 88. Set screw (fixing means) 89 Operation section 90 Screw part 91 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 wire 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 wire actuation means that pays out the wire in one direction to pivot the window body from a closed state to an open state and pulls the wire in the other direction to pivot the window body from an open state to a closed state, A kicking mechanism for applying a pivoting force to the window body during the initial movement of rotating the window body from a closed state to an open state is installed on either the window frame or the window body, and the wire operating mechanism is formed from 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 up and down 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 wire, 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 located 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. 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 while paying out the wire in one direction, using the kicking force of the kicking means at the initial movement to apply a pivoting force to the window body and pivot the window body from a closed state to an open state, or sliding the slider vertically along the guideline to operate the traction chain vertically, rotating the rotating mechanism while pulling the wire in the other direction to pivot 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 wire is fed out in one direction, the kicking force of the kicking means is used at the initial movement to apply a pivoting force to the window body and pivot 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 wire is pulled in the other direction to pivot the window body from an open state to a closed state.

3. The kicking mechanism is a kicking spring that applies a pivoting force to the window body when the free end of the window body pivots from the closed position to the open position, 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, the window body is rotatably installed on the lower frame and has a pivoting end that is airtightly in contact with the lower frame in the closed state, and a free end that pivots to a closed position airtightly in contact with the upper frame during the closing operation and pivots to an open position lower in the vertical direction during the opening operation, and is spaced apart in the horizontal direction The window opening and closing system according to claim 1 or claim 2, having first and second side portions that face each other and extend in the vertical direction, a pair of kick springs installed on the first and second side frames or the first and second side portions, wherein the window opening and closing system is such that when the free end of the window body rotates from the closed position to the open position, a rotational force is applied by the repulsive force of the kick springs and the window rotates, and during the rotation process excluding the initial movement, the free end of the window body automatically rotates downward in the vertical direction due to the weight of the window body, and before the free end of the window body rotates to the closed position, the free end rotates upward in the vertical direction against the repulsive force of the kick springs.

4. 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 to which the traction chain engages and which rotates in conjunction with the up-and-down movement of the traction chain, and a roller formed on the other side of the rod to which the wire is connected and which unwinds and rewinds the wire 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 wire, 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 wire, and the torque of the torsion spring facilitates the winding of the wire 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.

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