Window opening and closing system

Abstract

To provide a window opening / closing system that can automatically swivel the window body from the closed state to the open state to open a window body and automatically swivel the window body from the open state to the closed state to close the window body.SOLUTION: Swivel operation means of a window opening / closing system 10 is configured to include a guide line 17 extending in the vertical direction, a traction chain vertically moving along the guide line 17, a rotation mechanism rotating with the vertical movement of the traction chain to deliver a swivel chain and wind the swivel chain, and a direct-acting motor 21 installed below the guide line 17 to vertically move the traction chain. The window opening / closing system 10 causes the direct-acting motor 21 to move the traction chain upward in the vertical direction, delivers the swivel chain in one direction while rotating the rotation mechanism to swivel the window bodies 12a and 12b from the closed state to the opened state, and causes the direct-acting motor 21 to move the traction chain downward in the vertical direction to pull the swivel chain in the other direction while rotating the rotation mechanism to swivel the window bodies 12a and 12b from the opened state to the closed state.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

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

[0003] Also disclosed is a smoke vent window opening and closing device in which a smoke vent window opener / closer including a reel, a smoke vent window opening and closing member that is wound around the reel and forms a substantially straight state in the length direction when unwound from the reel, and a forward / reverse motor that drives the reel is installed on the window frame of the smoke vent window, and the smoke vent window opening and closing member is connected to the smoke vent side (see Patent Document 2). In this smoke vent window opening and closing device, when the reverse manual switch is turned on, the forward / reverse motor reverses and the winding shaft rotates in the unwinding direction, the smoke vent window opening and closing member (link material) is unwound in a straight state in the length direction and the smoke vent window is opened. When the forward manual switch is turned on, the forward / reverse motor rotates forward and the winding shaft rotates in the winding direction, the smoke vent window opening and closing member (link material) is wound up and the smoke vent window is closed. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-190236 [Patent Document 2] Publication No. 60-179785 Summary of the Invention [Problem to be solved by the invention]

[0005] In the window opening and closing device disclosed in Patent Document 1, when closing an open shoji screen (the window itself), the operator manually rotates the winding handle in a direction that winds up the wire. Rotating the winding handle requires the operator to rotate the handle multiple times, making the closing process cumbersome for the operator and requiring time and effort to close an open shoji screen. Furthermore, if the rotation of the handle is stopped halfway through closing the shoji screen, the shoji screen may be left in an incomplete state.

[0006] Furthermore, in the smoke exhaust window opening and closing device disclosed in Patent Document 2, when it is necessary to exhaust harmful smoke, toxic gases, etc. to the outside in the event of an emergency such as a fire, chemical leak, chemical agent leak, or gas leak, if the forward / reverse rotation motor does not operate due to a power outage, motor failure, electrical system failure, etc., the closed window cannot be opened and harmful smoke, toxic gases, etc. cannot be exhausted to the outside. Furthermore, if the forward / reverse rotation motor does not operate when ventilation is required, the closed window cannot be opened and ventilation cannot be performed.

[0007] An object of the present invention is to provide a window opening and closing system that can automatically rotate a window body from a closed state to an open state to open the window body, and that can automatically rotate the window body from an open state to a closed state to close the window body without any effort. Another object of the present invention is to provide a window opening and closing system that can reliably close the window body in a complete state without leaving the window body in an incompletely closed state. Another object of the present invention is to provide a window opening and closing system that can open the window body even if the motor does not operate due to, for example, a power outage, a motor failure, a failure in the electrical system, etc. [Means for solving the problem]

[0008] The premise of the present invention to solve the above problem is a window opening and closing system that includes a window body whose free end rotates vertically around a rotating end that is rotatably installed on a window frame, a rotating bar that is connected to the free end of the window body and rotates the window body from a closed state to an open state and from an open state to a closed state, and a rotating bar operating means that extends the rotating bar in one direction to rotate the window body from a closed state to an open state, or pulls the rotating bar in the other direction to rotate the window body from an open state to a closed state.

[0009] The feature of the present invention based on the above premise is that the swivel bar operating means is formed from a guideline extending in the vertical direction, a traction member that moves up and down along the guideline, a rotation mechanism that rotates in conjunction with the up and down movement of the traction member, unwinding and winding up the swivel bar, and a linear motor installed below the guideline that moves the traction member up and down, and the window opening and closing system operates the traction member upward in the vertical direction using the linear motor, rotates the rotation mechanism while unwinding the swivel bar in one direction to rotate the window body from a closed state to an open state, and operates the traction member downward in the vertical direction using the linear motor, rotates the rotation mechanism while pulling the swivel bar in the other direction to rotate the window body from an open state to a closed state.

[0010] In one example of the present invention, a linear motor includes a cylinder fixed below the guideline and a motor rod that rises upward from the upper end of the cylinder and descends downward to enter the interior of the cylinder, and the upper end of the motor rod is connected to one end of a traction member.

[0011] In another example of the present invention, the rotating bar actuating means is installed at one end of the towing member and includes a slider that slides up and down along a guideline, and the slider is connected to the upper end of the motor rod via a predetermined connecting mechanism and is separated from the upper end of the motor rod by releasing the connecting mechanism.

[0012] In another example of the present invention, the connecting mechanism is formed from a pin engagement hole drilled in the slider, a connecting plate installed at the upper end of the motor rod, an engagement pin installed on the connecting plate and moving forward or backward in a transverse direction that intersects with the up-down direction, with its tip protruding from the connecting plate and engaging in the pin engagement hole when moving forward and retracting from the pin engagement hole when moving backward, a biasing means for biasing the engagement pin to move forward, and a holder that houses the engagement pin and the biasing means and has an opening that opens to the side of the rear end of the engagement pin.

[0013] In another example of the present invention, the slider includes an inclined plate that inclines in the forward direction of the engagement pin as it moves downward in the vertical direction, and in the connecting mechanism, when the engagement pin is in a disconnected state where it has withdrawn from the pin engagement hole and the motor rod gradually rises upward in the vertical direction, and the tip of the engagement pin reaches the inclined plate of the slider, the inclined plate presses the tip of the engagement pin backward against the biasing force of the biasing means, and when the tip of the engagement pin reaches the pin engagement hole located directly above the inclined plate, the biasing force of the biasing means causes the tip of the engagement pin to move forward and engage into the pin engagement hole.

[0014] In another example of the present invention, a window opening and closing system includes a disconnection mechanism that, in a connected state in which the engagement pin is engaged in the pin engagement hole, retracts the engagement pin against the biasing force of the biasing means, causing the engagement pin to exit the pin engagement hole and release the connection between the motor rod and the slider.

[0015] In another example of the present invention, the decoupling mechanism is formed from an opening edge of the holder that surrounds the opening of the holder and slopes from the tip end side of the engagement pin toward the rear end side, and a handle that supports the rear end of the engagement pin, one end edge of which abuts the opening edge of the holder and is exposed from the opening, and which rotates clockwise or counterclockwise.In the decoupling mechanism, when the handle is rotated clockwise or counterclockwise, one end edge of the handle slides along the opening edge and the handle gradually retreats, and as the handle retreats, the engagement pin retreats against the biasing force of the biasing means, and the tip end of the engagement pin retreats from the pin engagement hole, releasing the connection between the motor rod and the slider.

[0016] In another example of the present invention, the traction member is a traction chain having one end connected to the slider and moving up and down as the slider slides up and down, and the rotation mechanism is formed from a rotating rod that is rotatably mounted on the window frame and extends horizontally, a sprocket formed on one side of the rotating rod with which the traction chain engages and rotates as the traction chain moves up and down, and a roller formed on the other side of the rotating rod with a rotating thread connected thereto, which pays out the rotating thread and winds it up as the sprocket rotates.

[0017] In another example of the present invention, a window frame is formed from upper and lower frames that extend horizontally and are spaced apart in the vertical direction, and first and second side frames that extend vertically and are spaced apart in the horizontal direction, the window body has a rotating end that is rotatably connected to the lower frame and that is airtightly attached to the lower frame in the closed state, and a free end that pivots to a closed position that is airtightly attached to the upper frame in the closed state, and pivots to an open position vertically below in the open state, the window opening and closing system includes an erection unit that extends downward from either the first or second side frame, a guideline is formed on the erection unit, and a cylinder of a linear motor is fixed to the erection unit.

[0018] In another example of the present invention, an installation unit is formed from a first guide plate and a second guide plate that face each other and extend in the vertical direction, and a base plate that is located between the first and second guide plates and extends in the vertical direction, and a first chain accommodating space that accommodates a towing chain so that it can move up and down is formed on the side of the first guide plate and extends in the vertical direction, and a second chain accommodating space that accommodates the towing chain so that it can move up and down is formed on the side of the second guide plate and extends in the vertical direction. [Effects of the Invention]

[0019] According to the window opening and closing system of the present invention, the linear motor operates the traction member upward in the vertical direction, and while rotating the rotation mechanism, the pivoting bar is extended in one direction to rotate the window body from a closed state to an open state. Therefore, the driving force of the linear motor can be used to automatically rotate the window body from a closed state to an open state. Compared to manually opening the window body, no opening operation is required; for example, the window body can be opened simply by operating the linear motor. The window opening and closing system operates the traction member downward in the vertical direction using the linear motor, and while rotating the rotation mechanism, the pivoting bar is pulled in the other direction to rotate the window body from an open state to a closed state. Therefore, the driving force of the linear motor can be used to automatically rotate the window body from an open state to a closed state. Compared to manually closing the window body, no closing operation is required; for example, the window can be closed easily simply by operating the linear motor. Because the window opening and closing system reliably rotates the window body to the closed position using the linear motor, the window body is never left in an incompletely closed state, and the window can be reliably closed completely.

[0020] In a window opening and closing system in which the linear motor is equipped with a cylinder fixed below the guideline and a motor rod that rises vertically upward from the upper end of the cylinder and descends vertically downward to enter the interior of the cylinder, and the upper end of the motor rod is connected to one end of a traction member, when the motor rod of the linear motor rises vertically upward, the traction member operates vertically upward, rotating the rotation mechanism and extending the rotating rod in one direction to rotate the window body from a closed state to an open state, so that the window body can be automatically rotated from a closed state to an open state using the driving force from the linear motion of the motor rod of the linear motor, and compared to opening the window body manually, no opening operation is required and the window body can be opened by simply operating the linear motor, for example. In the window opening and closing system, the motor rod of the linear motor descends vertically downward, causing the traction member to operate vertically downward, rotating the rotation mechanism and pulling the rotating bar in the other direction to rotate the window body from an open state to a closed state, so the window body can be automatically rotated from an open state to a closed state using the driving force from the linear movement of the motor rod of the linear motor, and compared to closing the window body manually, there is no need for a closing operation and the window body can be closed without much effort, for example, just by operating the closing operation of the linear motor. Because the window opening and closing system can reliably rotate the window body to the closed position using the vertical downward movement of the motor rod of the linear motor, the window body will not be left in an incompletely closed state and can be reliably closed completely.

[0021] In a window opening and closing system in which the pivoting bar operating means includes a slider that is installed at one end of the traction member and slides up and down along the guideline, and the slider is connected to the upper end of the motor rod via a predetermined connecting mechanism and is separated from the upper end of the motor rod by releasing the connecting mechanism, the connection between the slider and the motor rod is released by releasing the connecting mechanism and the slider is separated from the motor rod, so that the slider slides upward in the vertical direction along the guideline and the traction member operates upward in the vertical direction, and therefore the sliding of the slider separated from the motor rod rotates the rotation mechanism while extending the pivoting bar in one direction, allowing the window body to be rotated from a closed state to an open state, and by sliding the slider upward and downward the window body can be rotated from a closed state to an open state, and in the event of an emergency (in the event of a fire, chemical leak, leak of chemical agent, gas leak, etc.) the window body can be smoothly rotated from a closed state to an open state to quickly open the window body. Furthermore, even if the linear motor stops operating due to a power outage or malfunction, the slider can slide after the connection between the slider and the motor rod is released, allowing the window body to be quickly opened, and there is no need to install an emergency power supply facility to operate the motor in the event of a power outage, thereby simplifying the equipment. After the slider slides upward in the vertical direction to open the window body, the window opening and closing system can operate the traction member downward in the vertical direction by, for example, grasping the slider and sliding it downward in the vertical direction along the guideline, so that the sliding of the slider rotates the rotation mechanism and pulls the rotating bar in the other direction to rotate the window body from an open state to a closed state. The window body can be rotated from an open state to a closed state simply by sliding the slider downward in the vertical direction, and the window body can be closed by manually rotating the window body from an open state to a closed state.

[0022] In a window opening and closing system in which the connecting mechanism is formed from a pin engagement hole drilled in the slider, a connecting plate installed at the upper end of the motor rod, an engagement pin that is installed on the connecting plate and moves forward or backward in a direction intersecting the up-down direction, with its tip protruding from the connecting plate and engaging in the pin engagement hole when it moves forward and retracting from the pin engagement hole when it moves backward, a biasing means that biases the engagement pin to move forward, and a holder that houses the engagement pin and the biasing means and has an opening that opens to the side of the rear end of the engagement pin, the connected state between the slider and the motor rod is maintained by the tip of the engagement pin, which is biased to move forward by the biasing force of the biasing means, engaging in the pin engagement hole, and therefore the window body can be automatically rotated from a closed state to an open state using the driving force due to the linear movement of the motor rod of the linear motor, and the window body can be automatically rotated from an open state to a closed state using the driving force due to the linear movement of the motor rod of the linear motor. In the window opening and closing system, the connection between the slider and the motor rod is released when the tip of the engagement pin withdraws from the pin engagement hole, so the connection between the slider and the motor rod can be easily released and the window body can be quickly opened by quickly releasing the connection between the slider and the motor rod in the event of an emergency (such as a fire, chemical leak, chemical agent leak, or gas leak). Also, even if the motor stops working due to a power outage or malfunction, the tip of the engagement pin withdraws from the pin engagement hole to release the connection between the slider and the motor rod, and the slider then slides to quickly open the window body, and there is no need to install emergency power supply equipment to operate the linear motor in the event of a power outage, which simplifies the window opening and closing system (equipment).

[0023] The slider includes an inclined plate that inclines in the forward direction of the engagement pin as it moves downward in the vertical direction, and when, in a disconnected state in which the engagement pin has withdrawn from the pin engagement hole, the motor rod gradually rises upward in the vertical direction and the tip of the engagement pin reaches the inclined plate of the slider, the inclined plate presses the tip of the engagement pin backward against the biasing force of the biasing means, and when the tip of the engagement pin reaches the pin engagement hole located directly above the inclined plate, the biasing force of the biasing means causes the tip of the engagement pin to advance and engage in the pin engagement hole.In this window opening and closing system, by raising the motor rod of the linear motor upward in the vertical direction from the disconnected state in which the engagement pin has withdrawn from the pin engagement hole, the linear motor can be used to automatically engage the tip of the engagement pin into the pin engagement hole, which is less hassle and more reliable than manually connecting the slider and motor rod from the disconnected state.

[0024] A window opening and closing system includes a disconnection mechanism that, in a connected state in which the engagement pin is engaged in the pin engagement hole, retracts the engagement pin against the biasing force of the biasing means, causing the engagement pin to withdraw from the pin engagement hole and release the connection between the motor rod and the slider.By using the disconnection mechanism to withdraw the tip of the engagement pin from the pin engagement hole, the connection between the slider and the motor rod is released, so the connection between the slider and the motor rod can be easily released, and the connection between the slider and the motor rod can be quickly released when the linear motor is not operating and / or in an emergency, allowing the window body to be quickly opened.

[0025] The disconnection mechanism is formed by an opening edge of the holder that surrounds the opening of the holder and inclines from the tip end side of the engagement pin toward the rear end side, and a handle that supports the rear end of the engagement pin and has one end edge that abuts the opening edge of the holder and is exposed from the opening, and that rotates clockwise or counterclockwise, and when the handle is rotated clockwise or counterclockwise, one end edge of the handle slides along the opening edge and the handle gradually retreats, and as the handle retreats, the engagement pin retreats against the biasing force of the biasing means, and the tip end of the engagement pin retreats from the pin engagement hole and the connection between the motor rod and the slider is released.In this window opening and closing system, the connection between the slider and the motor rod can be released by rotating the handle clockwise or counterclockwise to withdraw the tip end of the engagement pin from the pin engagement hole, so the connection between the slider and the motor rod can be easily released, and the connection between the slider and the motor rod can be quickly released when the linear motor is not operating and / or in an emergency, allowing the window body to be quickly opened.

[0026] In this window opening and closing system, the traction member is a traction chain that has one end connected to the slider and moves up and down as the slider slides up and down, and the rotation mechanism is composed of a rotating rod that is rotatably installed on the window frame and extends horizontally, a sprocket that is formed on one side of the rotating rod and is engaged with the traction chain and rotates as the traction chain moves up and down, and a roller that is formed on the other side of the rotating rod and is connected to a swivel bar that pays out and winds up the swivel bar as the sprocket rotates.The slider slides upward in the vertical direction along the guideline to operate the traction chain upward in the vertical direction, and the operation of the traction chain in the vertical and downward directions rotates the sprocket, unwinding the swivel bar from the roller and rotating the window body from a closed state to an open state.Therefore, the window body can be rotated from a closed state to an open state simply by sliding the slider upward and downward, and the window body can be rotated smoothly from a closed state to an open state, making it easy to open. The window opening and closing system works by sliding the slider vertically downward along the guideline to operate the traction chain vertically downward, and the vertical downward operation of the traction chain rotates the sprocket, winding the rotating bar onto the roller and rotating the window body from an open state to a closed state. Therefore, the window body can be rotated from an open state to a closed state simply by sliding the slider vertically downward, and the window body can be smoothly rotated from an open state to a closed state, making it easy to close the window body.

[0027] The window frame is formed of upper and lower frames extending laterally and spaced apart in the vertical direction, and first and second side frames extending vertically and spaced apart in the horizontal direction, the window body having a rotating end portion rotatably connected to the lower frame and airtightly contacting the lower frame in a closed state, and a free end portion which swivels to a closed position in airtight contacting the upper frame in the closed state and swivels to an open position below in the vertical direction in an open state, the window body including an erection unit extending downward from either the first side frame or the second side frame, and a guide line In a window opening and closing system in which a guideline is formed on the installation unit and the cylinder of the linear motor is fixed to the installation unit, by forming guidelines on the installation unit and fixing the cylinder of the linear motor to the installation unit, the motor rod of the linear motor can be moved up and down along the guidelines, and the window body can be automatically rotated from a closed state to an open state using the driving force generated by the linear movement of the motor rod of the linear motor, and the window body can be automatically rotated from an open state to a closed state using the driving force generated by the linear movement of the motor rod of the linear motor. When the slider and the motor rod are separated, the window opening and closing system allows the slider to slide upward in the vertical direction along the guideline formed on the installation unit, thereby smoothly rotating the window body from a closed state to an open state and quickly opening the window body without requiring much effort or time.

[0028] In a window opening and closing system in which the installation unit is formed from a first guide plate and a second guide plate that face each other and extend in the vertical direction, and a base plate that is located between the first and second guide plates and extends in the vertical direction, a first chain accommodating space that accommodates the traction chain so that it can move up and down is formed on the side of the first guide plate and extends in the vertical direction, and a second chain accommodating space that accommodates the traction chain so that it can move up and down is formed on the side of the second guide plate and extends in the vertical direction, the traction chain is accommodated in the first and second chain accommodating spaces so that it can move up and down, so that the motor rod of the linear motor can move up and down along the guideline and the traction chain can operate in the vertical direction in the first and second chain accommodating spaces, and the window body can be automatically rotated from a closed state to an open state using the driving force due to the linear movement of the motor rod of the linear motor, and the window body can be automatically rotated from an open state to a closed state using the driving force due to the linear movement of the motor rod of the linear motor. When the slider and motor rod are separated, the window opening and closing system allows the slider to slide upward from the lower end of the guideline and the traction chain to operate vertically in the first and second chain storage spaces, thereby smoothly rotating the window body from a closed state to an open state and quickly opening the window body. [Brief explanation of the drawings]

[0029] [Figure 1] FIG. 1 is a front view of an example window opening and closing system. [Figure 2] FIG. 1 is a top view of a window opening and closing system. [Figure 3] FIG. 4 is a partially enlarged front view showing the window body in an open state. [Figure 4] FIG. 4 is a partially enlarged side view of an example of an installation unit. [Figure 5] Partially enlarged top view of the erection unit. [Figure 6] FIG. 4 is a partially enlarged front view of a first drive unit showing an example of a first rotation mechanism. [Figure 7] FIG. 7 is a partially enlarged front view of the first drive unit, continuing from FIG. 6; [Figure 8] A partially enlarged side view of the linear motor installed and fixed to the erection unit. [Figure 9] FIG. 10 is a partially enlarged front view showing an example of a coupling mechanism and a coupling release mechanism installed in the erection unit. [Figure 10] FIG. 4 is a partially enlarged side view of a coupling mechanism and a coupling release mechanism installed in the erection unit. [Figure 11] FIG. [Figure 12] FIG. 10 is a perspective view showing an example of a coupling mechanism in a coupled state and a coupling release mechanism. [Figure 13] FIG. 4 is a front view of the coupling mechanism and the uncoupling mechanism in a coupled state. [Figure 14] 13 is a cross-sectional view taken along line AA in FIG. 12. [Figure 15] FIG. 2 is a perspective view of the coupling mechanism and the coupling release mechanism in a separated state (disconnected state). [Figure 16] FIG. 2 is a front view of the coupling mechanism and the coupling release mechanism in a separated state (uncoupled state). [Figure 17] 16 is a cross-sectional view taken along line BB in FIG. 15. [Figure 18] FIG. 2 is a partially enlarged side view of the window opening and closing system with the first and second window bodies closed. [Figure 19] 19 is an enlarged partial side view of the window opening and closing system similar to FIG. 18 shown in cross section. [Figure 20] FIG. 2 is a partially enlarged side view of the window opening and closing system with the first and second window bodies opened. [Figure 21] 21 is an enlarged partial side view of the window opening and closing system similar to FIG. 20 shown in cross section. [Figure 22] 10A and 10B are diagrams illustrating the process of connecting the motor rod and the slider in a separated state (disconnected state). [Figure 23] FIG. 23 is a diagram illustrating the connection process continued from FIG. 22. DETAILED DESCRIPTION OF THE INVENTION

[0030] The window opening and closing system according to the present invention will be described in detail below with reference to the accompanying drawings, such as Fig. 1, which is a front view of a window opening and closing system 10 as an example. Fig. 2 is a top view of the window opening and closing system 10, and Fig. 3 is a partially enlarged front view showing the window body 12a in an open state. In Figs. 1 and 2, the up-down direction is indicated by arrow X, the lateral direction is indicated by arrow Y, and the front-rear direction is indicated by arrow Z. Fig. 1 shows two first and second window frames 11a, 11b and two first and second window bodies 12a, 12b, but there is no particular limitation on 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.

[0031] The window opening and closing system 10 (smoke exhaust operator) is installed in a building and is normally used to change the air (for indoor ventilation), and in the event of an emergency (such as a fire, chemical leak, or gas leak), it is used as a smoke exhaust window to exhaust harmful smoke, toxic gases, etc. to the outside. The window opening and closing system 10 comprises a first window frame 11a and a second window frame 11b, a first window body 12a (first shoji screen) installed in the first window frame 11a and a second window body 12b (second shoji screen) installed in the second window frame 11b, a first swivel chain 13a (swivel chain) that rotates the first window body 12a and a second swivel chain 13b (swivel chain) that rotates the second window body 12b, an installation unit 14 (chain box), a first drive unit 15a and a second drive unit 15b, and a swivel chain operating means 16 (chain operating means) that operates (reels out or reels in) the first and second swivel chains 13a, 13b.

[0032] The slewing bar operating means 16 (chain operating means) is made up of a guide line 17 (slide line), a slider 18, a traction chain 19 (traction member), a first rotation mechanism 20a, a second rotation mechanism 20b, a linear motor 21, a coupling mechanism 22, and a decoupling mechanism 23. The guide line 17, slider 18, traction chain 19, linear motor 21, coupling mechanism 22, and decoupling mechanism 23 are installed in the installation unit 14. The first rotation mechanism 20a is installed in the first drive unit 15a, and the second rotation mechanism 20b is installed in the second drive unit 15b (see FIG. 2).

[0033] The first window frame 11a and the second window frame 11b are installed at a high position (near the ceiling) of a specified building, and are rectangular with a long horizontal direction and the same shape and size lined up horizontally. The window frames 11a, 11b are made up of an upper frame 24 installed near the ceiling and extending straight in the horizontal direction, a lower frame 25 installed below the upper frame 24 and extending straight in the horizontal direction, and a first side frame 26a and a second side frame 26b located between the upper and lower frames 24, 25 and extending straight in the vertical direction.

[0034] In the first and second window frames 11a, 11b, the upper frame 24 and the lower frame 25 are parallel to each other and face each other in a vertical direction with a gap between them, and the first side frame 26a and the second side frame 26b are parallel to each other and face each other in a horizontal direction with a gap between them. In these window frames 11a, 11b, the upper and lower frames 24, 25 and the first and second side frames 26a, 26b form two rectangular windows (shoji screens) of the same shape and size that are elongated in the horizontal direction. There are no particular restrictions on the size or shape of the first and second window frames 11a, 11b, and they can be designed freely.

[0035] The upper and lower frames 24, 25 and the first and second side frames 26a, 26b are formed into a generally angled (L-shaped) shape. The upper frame 24 has an upper frame plate 27 located directly above the free ends 37 of the window bodies 12a, 12b and extending laterally, and an upper abutment plate 28 extending laterally perpendicular to the upper frame plate 27 and airtightly abutting against the rear surfaces of the free ends 37 of the window bodies 12a, 12b. The lower frame 25 has a lower frame plate 29 located directly below the rotating ends 36 of the window bodies 12a, 12b and extending laterally, and a lower abutment plate 30 extending laterally perpendicular to the lower frame plate 29 and airtightly abutting against the rear surfaces of the rotating ends 36 of the window bodies 12a, 12b.

[0036] The first side frame 26a has a first side frame plate 31 located on the side of the first side portions 38a of the first and second window bodies 12a, 12b and extending in the vertical direction, and a first abutment plate 32 extending in the vertical direction perpendicular to the first side frame plate 31 and airtightly abutting against the rear surfaces of the first side portions 38a of the window bodies 12a, 12b. The second side frame 26b has a second side frame plate 33 located on the side of the second side portions 38b of the first and second window bodies 12a, 12b and extending in the vertical direction, and a second abutment plate 34 extending in the vertical direction perpendicular to the second side frame plate 33 and airtightly abutting against the rear surfaces of the second side portions 38b of the window bodies 12a, 12b.

[0037] The first and second window frames 11a, 11b use resin sashes, aluminum sashes, or aluminum-resin composite sashes, and these window frames 11a, 11b are connected to the wall and to each other by existing connection means. Directly below the first and second window frames 11a, 11b (first and second window bodies 12a, 12b) is installed an openable window fixture 35, which has glass (glass shoji) fitted into a window frame (resin sash, aluminum sash, or aluminum-resin composite sash). The window frames 11a, 11b and the window fixture 35 are connected by existing connection means. Note that a wall may be installed directly below the first and second window frames 11a, 11b (first and second window bodies 12a, 12b).

[0038] The first window body 12a and the second window body 12b (shoji screens) are pivotally attached to the first and second window frames 11a and 11b, and are horizontally elongated rectangular bodies of the same shape and size lined up horizontally. The first and second window bodies 12a and 12b pivot from a closed state (closed position) to an open state (fully open position), and also pivot from the open state to the closed state. There are no particular limitations on the size or shape of the first and second window bodies 12a and 12b, and they can be freely designed according to the size and shape of the first and second window frames 11a and 11b.

[0039] The window bodies 12a, 12b have rotating end portions 36 (rotating frames) that are rotatably connected (installed) to the lower frames 25 of the window frames 11a, 11b and extend straight in the horizontal direction, free end portions 37 (swivel frames) that extend straight in the horizontal direction and spaced apart from the rotating end portions 36, and first side portions 38a (first side frames) and second side portions 38b (second side frames) that extend straight in the up-down direction and spaced apart from each other in the horizontal direction. A shoji metal fitting 39 is installed and fixed in the horizontal center of the free end portions 37. Although not shown, the first and second window frames 11a, 11b or the first and second window bodies 12a, 12b are provided with kick-out means such as kick-out springs or kick-out dampers that apply a kick-out force to the first and second window bodies 12a, 12b at the initial movement of opening the first and second window bodies 12a, 12b from a fully closed state.

[0040] When the window bodies 12a, 12b are closed (in the closed position), the rotating end 36 is in airtight contact with the lower abutment plate 30 of the lower frame 25, and the first and second side portions 38a, 38b are in airtight contact with the first and second abutment plates 32, 34 of the first and second side frames 26a, 26b. When the window bodies 12a, 12b are closed, the free end 37 pivots to a closed position where it is in airtight contact with the upper abutment plate 28 of the upper frame 24, and when the window bodies 12a, 12b are closed, it pivots to a fully open position downward in the vertical direction. Glass is fitted into the window bodies 12a, 12b (the rotating end 36, free end 37, and the inside of the first and second side portions 38a, 38b). The rotating end 36, free end 37, and first and second side portions 38a, 38b are made of a resin sash, an aluminum sash, or an aluminum-resin composite sash.

[0041] The first swivel chain 13a and the second swivel chain 13b (roller chains) are made of metal such as steel, stainless steel, titanium, etc. The tip of the first swivel chain 13a is connected to a sliding door fitting 39 at the free end 37 of the first window body 12a, and the tip of the second swivel chain 13b is connected to a sliding door fitting 39 at the free end 37 of the second window body 12b. The swivel chains 13a and 13b rotate the first and second window bodies 12a and 12b from a closed state to an open state, and also rotate the window bodies 12a and 12b from an open state to a closed state.

[0042] The first and second swivel chains 13a, 13b have linearity (straightness) that allows them to move in their axial direction. When the first and second window bodies 12a, 12b initially move (when they start to move) from a closed state to an open state, the linearity of the chains 13a, 13b generates a payout force (kick-out force) that encourages (promotes) the rotation of the free ends 37 of the window bodies 12a, 12b, and applies a rotation force to the free ends 37 of the window bodies 12a, 12b at the initial movement (when they start to move) to move the window bodies 12a, 12b to the open state.

[0043] In the window opening and closing system 10, when the first and second swivel chains 13a, 13b are unwound in one direction (forward in the front-to-rear direction), the free ends 37 of the first and second window bodies 12a, 12b, which are in airtight contact with the upper frame 24, rotate downward in the vertical direction around the rotating ends 36, and the window bodies 12a, 12b rotate from a closed state (closed position) to an open state (fully open position) (see Figures 19 and 20). The downward rotation angle of the window bodies 12a, 12b in the vertical direction varies depending on the unwound dimensions of the first and second swivel chains 13a, 13b, and by adjusting the unwound dimensions of the swivel chains 13a, 13b, the open area of ​​the window bodies 12a, 12b when open can be adjusted.

[0044] In the window opening / closing system 10, when the first and second swivel chains 13a, 13b are pulled in the other direction (rearward in the front-to-rear direction), the free ends 37 of the first and second window bodies 12a, 12b, which have swung downward in the vertical direction, swivel upward in the vertical direction around the rotating end 36, and the window bodies 12a, 12b swivel from an open state (fully open position) to a closed state (closed position) (see Figures 18 and 19).

[0045] FIG. 4 is a partially enlarged side view of an example installation unit 14, and FIG. 5 is a partially enlarged top view of the installation unit 14. FIG. 6 is a partially enlarged front view of a first drive unit 15a showing an example of a first rotation mechanism 20a, and FIG. 7 is a partially enlarged front view of the first drive unit 15a continuing from FIG. 6. FIG. 8 is a partially enlarged side view of a linear motor 21 installed and fixed to the installation unit 14, and FIG. 9 is a partially enlarged front view showing an example of a coupling mechanism 22 and a coupling release mechanism 23 installed in the installation unit 14. FIG. 10 is a partially enlarged side view of the coupling mechanism 22 and the coupling release mechanism 23 installed in the installation unit 14, and FIG. 11 is a partially enlarged perspective view of the installation unit 14.

[0046] FIG. 12 is a perspective view showing an example of the coupling mechanism 22 and the decoupling mechanism 23 in a coupled state, and FIG. 13 is a front view of the coupling mechanism 22 and the decoupling mechanism 23 in a coupled state. FIG. 14 is a cross-sectional view taken along line AA in FIG. 13 , and FIG. 15 is a perspective view of the coupling mechanism 22 and the decoupling mechanism 23 in a separated (decoupled) state. FIG. 16 is a front view of the coupling mechanism 22 and the decoupling mechanism 23 in a separated (decoupled) state, and FIG. 17 is a cross-sectional view taken along line BB in FIG. 16 . In FIG. 4 , a portion of the cover plate 43 is omitted. In FIG. 8 , the cover plate and the window fixture 35 are omitted, and the linear motor 21 is shown exposed. However, in practice, the linear motor 21 is concealed by the cover plate, or a cover with a vertically extending slit is attached so that only the handle 80 (described below) is exposed and the other components are concealed. In FIG. 10 , the traction chain 19 (traction member) is omitted. 12 and 15, the width direction is indicated by an arrow U, the cross direction is indicated by an arrow V, the clockwise direction is indicated by an arrow W1, and the counterclockwise direction is indicated by an arrow W2.

[0047] The installation unit 14 is made of metal such as aluminum alloy or stainless steel, or synthetic resin, and extends linearly downward from the second side frame 26b of the first window frame 11a. The installation unit 14 may extend linearly downward from the first side frame 26a of the first window frame 11a, or the installation unit 14 may extend linearly downward from the first side frame 26a of the second window frame 11b. The installation unit 14 may also extend linearly downward from the second side frame 26b of the second window frame 11b.

[0048] The installation unit 14 is formed from a first installation plate 40 and a second installation plate 41 of the same shape and size that face each other in the front-to-back direction and extend in the vertical direction, a base plate 42 and a cover plate 43 that are located between the first and second installation plates 40, 41 and extend in the vertical direction perpendicular to the installation plates 40, 41, a first chain accommodating space 44 (first guide recess) that is located on the side of the first installation plate 40 and extends in the vertical direction parallel to the first installation plate 40, and a second chain accommodating space 45 (second guide recess) that is located on the side of the second installation plate 41 and extends in the vertical direction parallel to the second installation plate 41.

[0049] In the installation unit 14, the first and second installation plates 40, 41 and the base plate 42 are molded integrally, and the cross section thereof is formed in a U-shape. The installation unit 14 has a vertically long storage space 46 surrounded by the plates 40 to 42. In the installation unit 14, a cover plate 43 is detachably attached to the first and second installation plates 40, 41 extending upward from the upper end 59 of the guide line 17, and covers the storage space 46 of the installation unit 14. In the installation unit 14, the first installation plate 40 is connected and fixed to the second side frame 26b of the first window frame 11a and the window frame of the window equipment 35 by predetermined connecting means (brackets, bolts and nuts, rivets, welding, etc.).

[0050] The first chain accommodating space 44 (first guide recess) is formed by a first guide plate 47 extending in the vertical direction adjacent to the first installation plate 40, a second guide plate 48 extending in the vertical direction away from the first guide plate 47 toward the second installation plate 41, and a first guide base plate 49 extending in the vertical direction and positioned between the first and second guide plates 47, 48. The first guide plate 47 and the second guide plate 48 are formed in an angled (L-shaped) shape.

[0051] The first and second guide plates 47, 48 and the first guide base plate 49 are housed in a housing space 46 of the installation unit 14, and the first guide base plate 49 is connected and fixed to the base plate 42 of the installation unit 14 by predetermined connecting means (bolts and nuts, rivets, welding, etc.). The traction chain 19 is housed in the first chain housing space 44 so that it can move (slide) up and down.

[0052] The second chain accommodating space 45 (second guide recess) is formed by a third guide plate 50 extending in the vertical direction adjacent to the second installation plate 41, a fourth guide plate 51 extending in the vertical direction away from the third guide plate 50 toward the first installation plate 40, and a second guide base plate 52 extending in the vertical direction and positioned between the third and fourth guide plates 50, 51. The third guide plate 50 and the fourth guide plate 51 are formed in an angled (L-shaped) shape.

[0053] The third and fourth guide plates 50, 51 and the second guide base plate 52 are accommodated in the accommodation space 46 of the installation unit 14, and the second guide base plate 52 is connected and fixed to the base plate 42 of the installation unit 14 by predetermined connecting means (bolts and nuts, rivets, welding, etc.). The traction chain 19 is accommodated in the second chain accommodation space 45 so as to be movable (slidable) up and down. The second guide plate 48 of the first chain accommodation space 44 and the fourth guide plate 51 of the second chain accommodation space 45 are connected by a connecting plate 53, so that the first chain accommodation space 44 and the second chain accommodation space 45 are integrally connected.

[0054] The first drive unit 15a and the second drive unit 15b are made of metal such as aluminum alloy or stainless steel, and are arranged on the upper frame 24 of the horizontally aligned (adjacent) window frames 11a, 11b, extending linearly in the horizontal direction. The first and second drive units 15a, 15b are formed from a first plate 54 and a third plate 56 that extend horizontally facing each other in the front-to-rear direction, a second plate 55 that is located between the first and third plates 54, 56 and extends horizontally perpendicular to the plates 54, 56, and bearing plates 57 that are located on the sides and in the center of the drive units 15a, 15b.

[0055] In the first and second drive units 15a, 15b, the first to third plates 54-56 are integrally molded and have a U-shaped cross section. The first drive unit 15a has a first storage space 58a that is long in the horizontal direction and surrounded by the first to third plates 54-56, and the second drive unit 15b has a second storage space 58b that is long in the horizontal direction and surrounded by the first to third plates 54-56. In the first and second drive units 15a, 15b, the first plate 54 is connected and fixed to the upper frame 24 of the window frames 11a, 11b by predetermined connecting means (brackets, bolts and nuts, rivets, welding, etc.).

[0056] The guide lines 17 are formed on the installation unit 14 extending downward from the second side frame 26b that forms the first window frame 11a, and are located below the first and second window bodies 12a, 12b (first and second window frames 11a, 11b). When the installation unit 14 extends downward from the first side frame 26a that forms the first window frame 11a, the guide lines 17 may be formed on the installation unit 14, and when the installation unit 14 extends downward from the first side frame 26a that forms the second window frame 11b, the guide lines 17 may be formed on the installation unit 14. When the installation unit 14 extends downward from the second side frame 26b that forms the second window frame 11b, the guide lines 17 may be formed on the installation unit 14.

[0057] The length dimension of the guide line 17 in the vertical direction can be adjusted (changed) as desired, and can be set to a height that makes it easy to move the slider 18 up and down (a height that makes it easy to move the slider 18 up and down with little force). The guide line 17 has an upper end 59 (the lower end of the cover plate 43) located on the side of the first and second window bodies 12a, 12b, a lower end 61 located on the ground side, and a movement space 60 (the vertical central area of ​​the erection unit 14) located between the upper end 59 and the lower end 61 and extending in the vertical direction.

[0058] The slider 18 is disposed in a movement space 60 of the guideline 17. The slider 18 is formed from an upper plate 62 that is formed into a generally plate-like shape that is long in the vertical direction, and a lower plate 63 that is formed into a generally plate-like shape that is long in the vertical direction and is located below the upper plate 62. The upper plate 62 (including a first connecting plate 66, which will be described later) and the lower plate 63 (including a second connecting plate 68, which will be described later) are made of metal such as aluminum alloy or stainless steel, or synthetic resin, and are formed into a generally rectangular plate-like shape.

[0059] The slider 18 (upper plate 62 and lower plate 63) slides vertically along the guideline 17, sliding upward in the movement space 60 (the vertical central area of ​​the erection unit 14) from the lower end 61 of the guideline 17 toward the upper end 59, and also sliding downward in the movement space 60 from the upper end 59 of the guideline 17 toward the lower end 61.

[0060] A pair of sliding rails 64a (sliding pieces) are attached to the back surface (sliding surface) of the upper plate 62, spaced apart and facing each other in the width direction. The sliding rails 64a are made of metal such as aluminum alloy or stainless steel, or synthetic resin, and are slidably installed (housed) on both sides of the first chain storage space 44 (first guide recess) in the width direction. Vertically extending recesses (grooves) of the sliding rails 64a engage with vertically extending protrusions (not shown) formed on both sides of the first chain storage space 44 in the width direction. One end 65 of the traction chain 19 is connected to the upper end of the upper plate 62. A first connecting plate 66 (first connecting portion) is integrally formed with the lower end of the upper plate 62, extending in the front-rear direction perpendicular to the plate 62. A screw hole 67 (screw hole) is formed in the first connecting plate 66.

[0061] A pair of sliding rails 64b (sliding pieces) are attached to the back surface (sliding surface) of the lower plate 63, spaced apart and facing each other in the width direction. The sliding rails 64b are made of metal such as aluminum alloy or stainless steel, or synthetic resin, and are slidably installed (housed) on both widthwise sides of the first chain accommodating space 44 (first guide recess). Vertically extending recesses (grooves) of the sliding rails 64b engage with vertically extending protrusions (not shown) formed on both widthwise sides of the first chain accommodating space 44. A second connecting plate 68 (second link) is integrally molded on the upper end of the lower plate 63, extending in the front-rear direction perpendicular to the lower plate 63 and facing the first connecting plate 66. A screw hole 67 (avoidance hole) is formed in the second connecting plate 68.

[0062] The lower part of the lower plate 63 forms an inclined plate 69 that extends downward in the vertical direction and is gradually inclined so as to move away from the back surface (sliding surface) toward the front in the transverse direction as it extends downward in the vertical direction (inclined toward the forward movement direction of an engagement pin 75 described below as it extends downward in the vertical direction). The lower plate 63 extending directly above the inclined plate 69 is drilled with a pin engagement hole 70 (coupling mechanism 22) that passes through the lower plate 63. The lower plate 63 (slider 18) is connected to an upper end 78 of a motor rod 73 of a linear motor 21 described below via the coupling mechanism 22, and is separated from the upper end 78 of the motor rod 73 by releasing the coupling mechanism 22.

[0063] A dimension adjustment screw 71 for adjusting the vertical separation between the upper plate 62 and the lower plate 63 is threadedly inserted (installed) into the screw hole 67 (screw hole) of the first connecting plate 66 and the screw hole 67 (clear hole) of the second connecting plate 68. A nut is threaded onto the threaded portion of the dimension adjustment screw 71. For example, by rotating the dimension adjustment screw 71 in a clockwise direction (forward direction), the first connecting plate 66 (first connecting portion) and the second connecting plate 68 (second connecting portion) gradually approach each other, thereby shortening the vertical separation between the upper plate 62 and the lower plate 63. By rotating the dimension adjustment screw 71 in a counterclockwise direction (reverse direction), the first connecting plate 66 (first connecting portion) and the second connecting plate 68 (second connecting portion) gradually move apart, thereby lengthening the vertical separation between the upper plate 62 and the lower plate 63.

[0064] The linear motor 21 includes a cylinder 72 and a motor rod 73 (motor shaft), and is disposed in the installation unit 14. The linear motor 21 is vertically erected so that the upper end opening of the cylinder 72 (the entrance / exit of the motor rod 73) faces upward, and the cylinder 72 is firmly fixed to the installation unit 14 by predetermined fixing means (fastening elements such as a fixing ring, bolts, nuts, etc.).

[0065] The motor rod 73 rises upward in the vertical direction from the upper end opening of the cylinder 72, gradually becoming exposed from the cylinder 72, and then descends downward in the vertical direction, gradually entering the interior of the cylinder 72. The linear motor 21 is supplied with electricity from a power source (not shown). The linear motor 21 is started or stopped by a switch (not shown). The switch has an open (ON) button (open operation), a stop (OFF) button, and a close (ON) button (close operation). Pressing the open (ON) button causes the motor rod 73 to rise upward in the vertical direction, and pressing the close (ON) button causes the motor rod 73 to descend downward in the vertical direction. Pressing the stop (OFF) button stops the motor rod 73 from rising or falling.

[0066] The connecting mechanism 22 is formed from a pin engagement hole 70 (pin engagement hole 70 drilled in the slider 18) drilled in the lower plate 63 extending directly above the inclined plate 69, a connecting plate 74, an engagement pin 75, a coil spring 76 (biasing means), and a holder 77. The connecting mechanism 22 connects the slider 18 to an upper end 78 of the motor rod 73. By connecting the slider 18 to the motor rod 73 via the connecting mechanism 22, the upper end 78 of the motor rod 73 is connected to one end 65 of the traction chain 19 (tracing member). The disconnecting mechanism 23 is formed from an opening edge 79 of the holder 77 and a handle 80.

[0067] In a connected state in which the engagement pin 75 is engaged in the pin engagement hole 70, the decoupling mechanism 23 retracts the engagement pin 75 rearward in the transverse direction against the force of the coil spring 76, causing the engagement pin 75 to withdraw from the pin engagement hole 70 and decoupling the slider 18 from the upper end 78 (linear motor 21) of the motor rod 73, and by decoupling the slider 18, separates it from the upper end 78 of the motor rod 73.

[0068] The connecting plate 74 is made of metal such as aluminum alloy or stainless steel and is formed into a generally rectangular plate. A pair of sliding rails 64c (sliding pieces) are attached to the back surface (sliding surface) of the connecting plate 74, spaced apart and facing each other in the width direction. The sliding rails 64c are made of metal such as aluminum alloy or stainless steel or synthetic resin, and are slidably installed (housed) on both sides of the first chain accommodating space 44 (first guide recess) in the width direction. Note that vertically extending recesses (grooves) of the sliding rails 64c fit into vertically extending protrusions (not shown) formed on both sides of the first chain accommodating space 44 in the width direction.

[0069] A holder 77 extending rearward in the transverse direction from the connecting plate 74 is attached to the surface of the upper part of the connecting plate 74. A connecting rod 81 extending rearward in the transverse direction from the connecting plate 74 and connected to an upper end 78 of the motor rod 73 is attached to the surface of the lower part of the connecting plate 74. A through-hole 82 passing through the connecting plate 74 in the transverse direction is drilled in the center of the upper part of the connecting plate 74. The upper end 78 of the motor rod 73 is fixed to the connecting rod 81 of the connecting plate 74, whereby the connecting plate 74 is installed (fixed) to the upper end 78 of the motor rod 73.

[0070] The holder 77 is made of a metal such as steel, stainless steel, or titanium, or a synthetic resin, and has a hollow housing portion 83 extending rearward in the transverse direction from the connecting plate 74, as well as a spring abutment portion 84 (spring abutment ring) extending radially inward from the inner peripheral surface of the housing portion 83 behind the housing portion 83. The engagement pin 75 is made of a metal such as steel, stainless steel, or titanium, or a synthetic resin, and is shaped like a cylindrical rod. The engagement pin 75 is inserted (housed) in the housing portion 83 (inside) of the holder 77 and extends rearward in the transverse direction from the connecting plate 74. A ring-shaped abutment flange 86 is formed at the tip 85 of the engagement pin 75, which abuts against the periphery of the through-hole 82 of the connecting plate 74.

[0071] Coil spring 76 (biasing means) is inserted (housed) in housing portion 83 (interior) of holder 77, is fitted onto the outer periphery of engagement pin 75, and extends rearward in the transverse direction from connecting plate 74. The front end of coil spring 76 abuts against abutment flange 86 of engagement pin 75, and the rear end of coil spring 76 abuts against spring abutment portion 84 of holder 77. The coil spring 76 urges engagement pin 75 forward in the transverse direction as indicated by the arrow in FIG. 14 by its urging force (repulsion force).

[0072] The opening edge 79 of the holder 77 surrounds the opening 87 of the holder 77, is formed by cutting (notching) the opening 87 of the holder 77 from the front to the rear in the transverse direction, and is inclined spirally from the front to the rear in the transverse direction (it is inclined spirally from the side of the tip end 85 of the engagement pin 75 to the side of the rear end 88). The handle 80 is made of a metal such as steel, stainless steel, or titanium, or a synthetic resin, and includes a shaft portion 89 connected and fixed to the rear end 88 of the engagement pin 75, and a swivel portion 90 extending radially outward from the shaft portion 89.

[0073] A shaft portion 89 of the handle 80 is connected to and fixed to a rear end portion 88 of the engagement pin 75, and supports the rear end portion 88 of the engagement pin 75. A pivoting portion 90 of the handle 80 is exposed from the opening edge 79 (opening 87) of the holder 77, and extends radially outward from the holder 77. One end edge 91 (lower end edge) of the handle 80 slidably abuts against the opening edge 79 of the holder 77. The pivoting portion 90 of the handle 80 pivots (rotates) clockwise or counterclockwise around the shaft portion 89.

[0074] 12 to 14, in the connected state between the slider 18 and the motor rod 73 of the linear motor 21, the engaging pin 75 is urged forward in the transverse direction by the urging force of the coil spring 76, the abutment flange 86 of the engaging pin 75 abuts against the periphery of the through hole 82 of the connecting plate 74, and the tip end 85 of the engaging pin 75 protrudes forward in the transverse direction from the insertion hole 82 and engages with the pin engaging hole 70 of the lower plate 63, connecting the slider 18 and the upper end 78 of the motor rod 73. By urging the engaging pin 75 forward in the transverse direction by the coil spring 76, the engaged state of the engaging pin 75 in the pin engaging hole 70 is maintained, and the connected state between the slider 18 (lower plate 63) and the upper end 78 (connecting plate 74) of the motor rod 73 of the linear motor 21 is maintained.

[0075] To release the connection between the slider 18 (lower plate 63) and the upper end 78 (connecting plate 74) of the motor rod 73 of the linear motor 21, the pivoting part 90 of the handle 80 is rotated clockwise as indicated by arrow W1 or counterclockwise as indicated by arrow W2. When the pivoting part 90 of the handle 80 is rotated clockwise or counterclockwise, one end edge 91 (lower end edge) of the pivoting part 90 of the handle 80, which abuts against the opening edge 79 of the holder 77, slides along the opening edge 79, and the spirally inclined opening edge 79 of the holder 77 gradually moves the handle 80 (shaft 89 and pivoting part 90) backward in the cross direction.

[0076] When the handle 80 moves backward in the transverse direction, the engagement pin 75, whose rear end 88 is connected to the shaft 89 of the handle 80, moves backward in the transverse direction against the biasing force of the coil spring 76, and the tip 85 of the engagement pin 75 moves out of the pin engagement hole 70, releasing the connection between the upper end 78 (connecting plate 74) of the motor rod 73 of the linear motor 21 and the slider 18 (lower plate 63), making it possible to separate the upper end 78 of the motor rod 73 from the slider 18. When the connection between the upper end 78 of the motor rod 73 and the slider 18 is released, the motor rod 73 of the linear motor 21 is released from the constraint of the slider 18.

[0077] The traction chain 19 (traction member) is made of metal such as steel, stainless steel, or titanium. One end 65 of the traction chain 19 is connected to the upper end of the upper plate 62 of the slider 18 and is housed in the first chain accommodating space 44 (first guide recess) and the second chain accommodating space 45 (second guide recess), extending in the vertical direction. The traction chain 19 moves up and down in the first chain accommodating space 44 and the second chain accommodating space 45 as the slider 18 slides up and down (moves up and down). The other end 92 (free end) of the traction chain 19 is located in the second chain accommodating space 45 (second guide recess), and hangs down from a sprocket 94, which will be described later.

[0078] When the slider 18 slides upward in the vertical direction in the movement space 60 (the vertical central area of ​​the installation unit 14) from the lower end 61 to the upper end 59 of the guideline 17, one end 65 of the traction chain 19 moves upward in the vertical direction in conjunction with this, and the entire traction chain 19 moves upward in the vertical direction. When the slider 18 slides downward in the movement space 60 from the upper end 59 to the lower end 61 of the guideline 17, one end 65 of the traction chain 19 moves downward in the vertical direction in conjunction with this, and the entire traction chain 19 moves downward in the vertical direction.

[0079] The first rotation mechanism 20a is linked to the up and down movement of the traction chain 19 caused by the up and down sliding of the slider 18, and pays out the first swivel chain 13a in one direction (forward in the front-to-rear direction) or takes up (winds up) the first swivel chain 13a in the other direction (rear in the front-to-rear direction). The first rotation mechanism 20a is formed by a first rotating rod 93a, a sprocket 94, a first roller 95a, a first ring mounting drum 96a, and a first torsion spring 97a. The first rotating rod 93a, sprocket 94, first roller 95a, first ring mounting drum 96a, and first torsion spring 97a are installed (housed) in the first housing space 58a of the first drive unit 15a.

[0080] The second rotation mechanism 20b is linked to the up and down movement of the traction chain 19 caused by the up and down sliding of the slider 18, and pays out the second swivel chain 13b in one direction (forward in the front-to-rear direction) or takes up (winds up) the second swivel chain 13b in the other direction (rear in the front-to-rear direction). The second rotation mechanism 20b is formed by a second rotation rod 93b, a second roller 95b, a second ring mounting drum 96b, and a second torsion spring 97b. The second rotation rod 93b, second roller 95b, second ring mounting drum 96b, and second torsion spring 97b are installed (housed) in the second housing space 58b of the second drive unit 15b.

[0081] The first rotating rod 93a and the second rotating rod 93b are made of metal such as aluminum alloy or stainless steel, or synthetic resin, and are formed into a cylindrical shape. The first rotating rod 93a is rotatably housed in the first housing space 58a of the first drive unit 15a (rotatably mounted on the first window frame 11a) and extends in the horizontal direction. The second rotating rod 93b is rotatably housed in the second housing space 58b of the second drive unit 15b (rotatably mounted on the second window frame 11b) and extends in the horizontal direction.

[0082] The first rotating rod 93a has one end and an intermediate portion rotatably supported by the bearing plate 57 of the first drive unit 15a. The second rotating rod 93b has one end and an intermediate portion rotatably supported by the bearing plate 57 of the second drive unit 15b. The first and second rotating rods 93a, 93b are connected at their other ends and integrated into one body. Therefore, when one of the first and second rotating rods 93a, 93b rotates clockwise (forward), the other also rotates clockwise (forward), and when one rotates counterclockwise (reverse), the other also rotates counterclockwise (reverse).

[0083] The sprocket 94 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 rotating rod 93a. A traction chain 19 is engaged with the teeth of the sprocket 94. The sprocket 94 rotates clockwise (forward direction) or counterclockwise (reverse direction) as the traction chain 19 moves up and down, transmitting a rotational force to the first and second rotating rods 93a and 93b.

[0084] The outer diameter of the sprocket 94 is adjustable. Under the condition that the peripheral speed of the sprocket 94 (speed of the slider 18) is constant, increasing the outer diameter of the sprocket 94 increases the ratio of the diameter of the sprocket 94 to the diameters of the first and second rotating rods 93a, 93b, and reduces the force required to pivot the first and second window bodies 12a, 12b upward in the vertical direction from the open state to the closed state (the force pushing the slider 18 downward). However, because the total number of rotations of the first and second rods 93a, 93b required to change the window bodies 12a, 12b from the open state to the closed state remains unchanged, the increase in the outer diameter of the sprocket 94 increases the vertical movement dimension (sliding distance) of the slider 18 (the extension and contraction dimension of the motor rod 73 of the linear motor 21).

[0085] Conversely, by reducing the outer diameter of the sprocket 94, the ratio of the diameter of the sprocket 94 to the diameter of the first and second rotating rods 93a, 93b becomes smaller, and the force (force pushing the slider 18 downward) when rotating the first and second window bodies 12a, 12b upward in the vertical direction from the open state to the closed state becomes larger, but the vertical movement dimension (sliding distance) of the slider 18 (extension and contraction dimension of the motor rod 73 of the linear motor 21) becomes shorter.

[0086] In the window opening / closing system 10, by increasing the outer diameter of the sprocket 94, the vertical movement dimension of the slider 18 between the closed and open states of the first and second window bodies 12a, 12b (the extension and contraction dimension of the motor rod 73 of the linear motor 21) increases, but the slider 18 can be slid downward in the vertical direction without requiring a large force, and the window bodies 12a, 12b can be easily rotated from the closed state to the open state, and the window bodies 12a, 12b can be easily rotated from the open state to the closed state.

[0087] By reducing the outer diameter of the sprocket 94, the window opening and closing system 10 requires force to slide the slider 18 downward in the vertical direction, but the vertical movement dimension of the slider 18 between the closed and open states of the first and second window bodies 12a, 12b (the extension and contraction dimension of the motor rod 73 of the linear motor 21) can be reduced, and the window bodies 12a, 12b can be rotated from the closed state to the open state and from the open state to the closed state by simply sliding the slider 18 a short distance (extending and contracting the motor rod 73 of the linear motor 21 a short distance).

[0088] The first roller 95a and the second roller 95b are made of metal such as aluminum alloy or stainless steel, or synthetic resin, and are formed into a cylindrical shape. The first roller 95a is housed in the first housing space 58a of the first drive unit 15a and is installed (fitted) in the middle of the first rotating rod 93a. The second roller 95b is housed in the second housing space 58b of the second drive unit 15b and is installed (fitted) in the middle of the second rotating rod 93b.

[0089] The first roller 95a rotates clockwise (forward direction) or counterclockwise (reverse direction) in accordance with the rotation of the first rotating rod 93a, and the second roller 95b rotates clockwise (forward direction) or counterclockwise (reverse direction) in accordance with the rotation of the second rod 93b. The other end of the first swivel chain 13a is connected and fixed to the first roller 95a, and the other end of the second swivel chain 13b is connected and fixed to the second roller 95b.

[0090] When the sprocket 94 is viewed from the other end of the first rotating rod 93a, the first roller 95a rotates counterclockwise, causing the first roller 95a to pull the first swivel chain 13a in the other direction (rearward in the front-to-rear direction) as shown in FIG. 6. When the first roller 95a rotates clockwise, the first swivel chain 13a is unwound in one direction (forward in the front-to-rear direction) from the first roller 95a as shown in FIG. 7. When the sprocket 94 is viewed from the other end of the second rotating rod 93b, the second roller 95b rotates clockwise, causing the second roller 95b to pull the second swivel chain 13b in the other direction (rearward in the front-to-rear direction). When the second roller 95b rotates counterclockwise, the second swivel chain 13b is unwound in one direction (forward in the front-to-rear direction) from the second roller 95b.

[0091] The first ring mounting drum 96a and the second ring mounting drum 96b are made of metal such as aluminum alloy or stainless steel, or synthetic resin, and are molded into a cylindrical shape. The first ring mounting drum 96a is housed in the first housing space 58a of the first drive unit 15a and is installed (fitted) on one end side of the first rotating rod 93a (laterally outward from the first roller 95a). The second ring mounting drum 96b is housed in the second housing space 58b of the second drive unit 15b and is installed (fitted) on one end side of the second rotating rod 93b (laterally outward from the second roller 95b).

[0092] Depending on the size and shape of the first and second window bodies 12a, 12b, the first ring mounting drum 96a may be installed (fitted) in the middle of the first rotating rod 93a, and the first roller 95a may be installed (fitted) on one end side of the first rotating rod 93a (laterally outward from the first ring mounting drum 96a). The second ring mounting drum 96b may be installed (fitted) in the middle of the second rotating rod 93b, and the second roller 95b may be installed (fitted) on one end side of the second rotating rod 93b (laterally outward from the second ring mounting drum 96b).

[0093] The first torsion spring 97a and the second torsion spring 97b are made of hard steel wire, stainless steel wire, or spring phosphor bronze. The first torsion spring 97a is attached to the first ring mounting drum 96a and extends in the axial direction of the first rotating rod 93a. The second torsion spring 97b is attached to the second ring mounting drum 96b and extends in the axial direction of the second rotating rod 93b. The arm shapes of the first and second torsion springs 97a, 97b can be short hook, straight, single-stage bent, or other shapes. The outer diameter, inner diameter, and number of coils of the torsion springs 97a, 97b can be set as desired depending on the torque required to rotate the first and second window bodies 12a, 12b (shōji screens) upward and downward (the auxiliary force required to slide the slider 18 downward and upward).

[0094] In the first rotation mechanism 20a, with the first ring mounting drum 96a inserted into the first torsion spring 97a, the fixed point of the arm of the first torsion spring 97a is connected and fixed to one of the first to third plates 54 to 56 or the bearing plate 57 of the first drive unit 15a, and the load point of the arm of the first torsion spring 97a is connected and fixed to the outer peripheral edge of the first rotation rod 93a.

[0095] In the second rotation mechanism 20b, with the second ring mounting drum 96b inserted into the second torsion spring 97b, the fixed point of the arm of the second torsion spring 97b is connected and fixed to one of the first to third plates 54 to 56 or the bearing plate 57 of the second drive unit 15b, and the load point of the arm of the second torsion spring 97b is connected and fixed to the outer peripheral edge of the second rotation rod 93b.

[0096] When the first rotating rod 93a rotates clockwise and the first swivel chain 13a is unwound in one direction (forward in the front-to-rear direction) from the first roller 95a, the first torsion spring 97a twists in the winding direction or in the direction opposite to the winding direction. When the second rotating rod 93b rotates clockwise and the second swivel chain 13b is unwound in one direction (forward in the front-to-rear direction) from the second roller 95b, the second torsion spring 97b twists in the winding direction or in the direction opposite to the winding direction.

[0097] When the first and second torsion springs 97a, 97b are twisted in the direction opposite to their winding direction, they generate a torque (repulsive force) in the opposite direction (winding direction) proportional to the angle of twist, and when they are twisted in the winding direction, they generate a torque (repulsive force) in the opposite direction (opposite to the winding direction) proportional to the angle of twist. In the window opening and closing system 10, the torque (outer diameter, inner diameter, number of windings, repulsion coefficient) of the first and second torsion springs 97a, 97b is adjusted so that the load acting on the slider 18 when the window bodies 12a, 12b are rotated from bottom to top in the vertical direction is about 1.5 to 2 kgf.

[0098] Figure 18 is a partially enlarged side view of the window opening and closing system 10 with the first and second window bodies 12a, 12b closed, and Figure 19 is a partially enlarged side view of the window opening and closing system 10 similar to Figure 18, but shown in cross section. Figure 20 is a partially enlarged side view of the window opening and closing system 10 with the first and second window bodies 12a, 12b open, and Figure 21 is a partially enlarged side view of the window opening and closing system 10 similar to Figure 20, but shown in cross section. Figures 19 and 21 show the traction chain 19 (tracing member) in an exposed state.

[0099] The following is an example of a procedure for opening the first and second window bodies 12a, 12b from a closed state by using the linear motor 21 to rotate the free ends 37 of the window bodies 12a, 12b downward in the vertical direction. Note that when the first and second window bodies 12a, 12b are closed, the first and second swivel chains 13a, 13b are drawn (wound) in the other direction (rearward in the front-to-rear direction) by the first and second rollers 95a, 95b, the free ends 37 of the window bodies 12a, 12b rotate to the closed position, the rotating end 36 is in airtight contact with the lower frame 25, the first and second side portions 38a, 38b are in airtight contact with the first and second side frames 26a, 26b, and the free ends 37 are in airtight contact with the upper frame 24. Furthermore, the slider 18 (lower plate 63) is connected to the upper end 78 (connecting plate 74) of the motor rod 73 of the linear motor 21 by the connecting mechanism 22, and the slider 18 is positioned above the upper end opening (motor rod entrance / exit) of the cylinder 72 (lower end 61 of the guideline 17).

[0100] The operator presses the open (ON) button (open operation) of the switch of the linear motor 21. When the open (ON) button of the switch is pressed, the linear motor 21 starts, and the motor rod 73 gradually rises upward in the vertical direction, and the motor rod 73 gradually becomes exposed from the cylinder 72. As the motor rod 73 rises upward in the vertical direction, the slider 18 gradually slides upward in the movement space 60 from the lower end 61 of the guide line 17 toward the upper end 59.

[0101] When the slider 18 slides upward, the traction chain 19 located in the first chain housing 44 moves upward in conjunction with the sliding of the slider 18, causing the sprocket 94 engaged with the traction chain 19 to rotate clockwise. When the sprocket 94 rotates, the first and second rotating rods 93a, 93b (rotation mechanisms 20a, 20b) rotate clockwise in conjunction with the rotation of the sprocket 94, and the first and second rollers 95a, 95b rotate clockwise in conjunction with the rotation of the first and second rotating rods 93a, 93b. When the first and second rollers 95a, 95b rotate clockwise, the first and second swivel chains 13a, 13b are unwound in one direction (forward in the front-to-rear direction) from the first and second rollers 95a, 95b, as shown in Figures 20 and 21 .

[0102] At the initial movement (start of rotation) of rotating the first and second window bodies 12a, 12b from a closed state to an open state, when the first and second swivel chains 13a, 13b are unwound in one direction (forward in the front-to-back direction) from the first and second rollers 95a, 95b, the linear motion (straight-line movement) of the swivel chains 13a, 13b causes the swivel chains 13a, 13b to generate (exert) a pull-out force (kick-out force) that encourages (promotes) the downward vertical rotation of the free ends 37 of the first and second window bodies 12a, 12b, and the swivel chains 13a, 13b press (push) the free ends 37 of the first and second window bodies 12a, 12b forward in the front-to-back direction, applying a downward vertical rotation force to the free ends 37 of the window bodies 12a, 12b.

[0103] The first and second window bodies 12a, 12b rotate using the payout force of the first and second swivel chains 13a, 13b during the initial movement when the free ends 37 of those window bodies 12a, 12b rotate from the closed position to the open position. Then, during the rotation process other than the initial movement, as the motor rod 73 of the linear motor 21 rises upward and downward, the slider 18 slides upward along the guideline 17 and the traction chain 19 operates upward, the first and second swivel chains 13a, 13b are paid out in one direction (forward in the front-to-back direction), the first and second rotating rods 93a, 93b (rotating mechanisms 20a, 20b) rotate clockwise, and the sprocket 94 rotates clockwise, causing the free ends 37 of those window bodies 12a, 12b to rotate downward in the up-down direction around the rotating end 36. After the first and second window bodies 12a and 12b have been rotated to the fully open position and opened, the linear motor 21 is stopped.

[0104] Furthermore, by pressing the stop (OFF) button while the motor rod 73 of the linear motor 21 is rising (while the free ends 37 of the first and second window bodies 12a and 12b are pivoting), the operation of the linear motor 21 can be stopped and the rise of the motor rod 73 (the pivoting of the free ends 37 of the window bodies 12a and 12b) can be stopped midway. By stopping the rise of the motor rod 73 (the pivoting of the free ends 37 of the first and second window bodies 12a and 12b) midway using the stop (OFF) button, the window bodies 12a and 12b can be opened to a predetermined opening degree. After the rise of the motor rod 73 (the pivoting of the free ends 37 of the window bodies 12a and 12b) is stopped midway, the motor rod 73 can be raised again and the window bodies 12a and 12b can be fully opened by pressing the open (ON) button (opening operation).

[0105] When the first swivel chain 13a is unwound in one direction (forward in the front-to-rear direction) from the first roller 95a and the first rotating rod 93a (first ring mounting drum 96a) rotates clockwise, the load point of the first torsion spring 97a twists in the opposite direction to the winding direction, or twists in the winding direction, with the fixed point of the arm as the torsion base end.When the second swivel chain 13b is unwound in one direction (forward in the front-to-rear direction) from the second roller 95b and the second rotating rod 93b (second ring mounting drum 96b) rotates clockwise, the load point of the second torsion spring 97b twists in the opposite direction to the winding direction, or twists in the winding direction, with the fixed point of the arm as the torsion base end.

[0106] When the first and second torsion springs 97a, 97b are twisted in the opposite direction to the winding direction or in the winding direction, the torsion springs 97a, 97b exert a torque in the opposite direction (the winding direction or the opposite direction to the winding direction) proportional to the twist angle, and the torque of the torsion springs 97a, 97b applies a rotational force to the free ends 37 of the first and second window bodies 12a, 12b to rotate them upward in the vertical direction from the open position to the closed position.

[0107] In the window opening and closing system 10, when the motor rod 73 of the linear motor 21 rises upward in the vertical direction, the traction chain 19 (traction member) operates upward in the vertical direction, rotating the first and second rotating mechanisms 20a, 20b and unwinding the first and second swivel chains 13a, 13b (swivel bars) in one direction to rotate the first and second window bodies 12a, 12b (window bodies) from a closed state to an open state.Therefore, the first and second window bodies 12a, 12b can be automatically rotated from a closed state to an open state by utilizing the driving force generated by the linear vertical movement of the motor rod 73 of the linear motor 21, and the window bodies 12a, 12b can be opened simply by pressing the open (ON) button of the switch (open operation) (open operation of the linear motor 21).

[0108] The window opening and closing system 10 forms a guideline 17 in the vertical central area of ​​the erection unit 14 and fixes the cylinder 72 of the linear motor 21 to the erection unit 14 in an upright position, thereby allowing the motor rod 73 of the linear motor 21 to move up and down along the guideline 17, and the first and second window bodies 12a, 12b (window bodies) can be automatically rotated from a closed state to an open state using the driving force (torque) generated by the linear motion of the motor rod 73 of the linear motor 21.

[0109] To close the first and second window bodies 12a, 12b by pivoting the free ends 37 of the window bodies 12a, 12b upward in the vertical direction from an open state, the operator presses the close (ON) button (close operation) of the switch. Pressing the close (ON) button of the switch starts the linear motor 21, and the motor rod 73 gradually descends downward in the vertical direction. As the motor rod 73 descends, the slider 18 gradually slides downward in the vertical direction in the movement space 61 from the upper end 59 of the guide line 17 toward the lower end 61. Note that the torque (repulsive force) of the first and second torsion springs 97a, 97b adjusts the load acting on the slider 18 (linear motor 21) when pivoting the window bodies 12a, 12b upward from the lower end in the vertical direction to approximately 1.5 to 2 kgf.

[0110] When the slider 18 slides downward in the up-down direction, the traction chain 19 moves downward in conjunction with the sliding of the slider 18, and the sprocket 94 engaged with the traction chain 19 rotates counterclockwise. When the sprocket 94 rotates, the first and second rotating rods 93a, 93b (first and second rotating mechanisms 20a, 20b) rotate counterclockwise in conjunction with the rotation of the sprocket 94, and the first and second rollers 95a, 95b rotate counterclockwise in conjunction with the rotation of the first and second rotating rods 93a, 93b. When the first and second rollers 95a, 95b rotate counterclockwise, the first and second swivel chains 13a, 13b are wound around the first and second rollers 95a, 95b in the other direction (rearward in the front-to-rear direction).

[0111] As the first and second swivel chains 13a, 13b are wound around the first and second rollers 95a, 95b, the free ends 37 of the first and second window bodies 12a, 12b begin to swivel upward in the vertical direction from the open position toward the closed position. Because a swivel force is applied to the free ends 37 of the first and second window bodies 12a, 12b by the torque of the first and second torsion springs 97a, 97b to rotate them from the open position toward the closed position, the entire weight of the window bodies 12a, 12b is not applied to the sliding of the slider 18 or the linear motor 21, and only a load (in the range of 1.5 to 2 kgf) obtained by subtracting the repulsive force of the torsion springs 96a, 97b from the weight of the window bodies 12a, 12b acts on the slider 18 and the linear motor 21.

[0112] As the slider 18 slides toward the lower end 61 of the guideline 17, the first and second window bodies 12a, 12b pivot from an open state to a closed state. When the first and second window bodies 12a, 12b are closed, the first and second torsion springs 97a, 97b untwist and the torque of these torsion springs 97a, 97b becomes zero. As the slider 18 slides toward the lower end 61 of the guideline 17, the first and second window bodies 12a, 12b pivot to the fully closed position. After the window bodies 12a, 12b are closed, the linear motor 21 stops. When the first and second window bodies 12a, 12b pivot to the fully closed position, the rotating end 36 comes into airtight contact with the lower frame 25, the first and second side portions 38a, 38b come into airtight contact with the first and second side frames 26a, 26b, and the free end 37 comes into airtight contact with the upper frame 24.

[0113] Furthermore, by pressing the stop (OFF) button while the motor rod 73 of the linear motor 21 is descending (while the free ends 37 of the first and second window bodies 12a and 12b are pivoting), the operation of the linear motor 21 can be stopped and the descent of the motor rod 73 (the pivoting of the free ends 37 of the window bodies 12a and 12b) can be stopped midway. By stopping the descent of the motor rod 73 (the pivoting of the free ends 37 of the window bodies 12a and 12b) midway using the stop (OFF) button, the window bodies 12a and 12b can be opened to a predetermined opening degree. After the descent of the motor rod 73 (the pivoting of the free ends 37 of the window bodies 12a and 12b) is stopped midway, the motor rod 73 can be lowered again and the window bodies 12a and 12b can be fully closed by pressing the close (ON) button (closing operation).

[0114] In the window opening and closing system 10, when the motor rod 73 of the linear motor 21 descends downward in the vertical direction, the traction chain 19 (traction member) operates downward in the vertical direction, rotating the first and second rotating mechanisms 20a, 20b and pulling the first and second swivel chains 13a, 13b (swivel bars) in the other direction, thereby rotating the first and second window bodies 12a, 12b (window bodies) from an open state to a closed state.Therefore, the first and second window bodies 12a, 12b can be automatically rotated from an open state to a closed state by utilizing the driving force generated by the linear vertical movement of the motor rod 73 of the linear motor 21. Compared to manually closing the window bodies 12a, 12b, which is an example of a conventional closing operation, the window bodies 12a, 12b can be closed without any hassle by simply pressing the close (ON) button on the switch (close operation) (close operation of the linear motor 21).

[0115] The window opening and closing system 10 is adjusted so that the load acting on the slider 18 and the linear motor 21 when the window bodies 12a, 12b are rotated from bottom to top in the vertical direction is approximately 1.5 to 2 kgf due to the repulsive force (torque) of the first and second torsion springs 97a, 97b. Therefore, the load on the linear motor 21 when the window bodies 12a, 12b are closed can be reduced, and the power consumption of the linear motor 21 can be reduced.

[0116] The window opening and closing system 10 forms a guideline 17 in the vertical central area of ​​the erection unit 14 and fixes the cylinder 72 of the linear motor 21 to the erection unit 14 in an upright position, thereby allowing the motor rod 73 of the linear motor 21 to move up and down along the guideline 17, and the first and second window bodies 12a, 12b (window bodies) can be automatically rotated from an open state to a closed state using the driving force (torque) generated by the linear motion of the motor rod 73 of the linear motor 21.

[0117] The window opening and closing system 10 can reliably rotate the first and second window bodies 12a, 12b to the closed position by utilizing the downward vertical movement of the motor rod 73 of the linear motor 21, so that the window bodies 12a, 12b are not left in an incompletely closed state and can reliably close the window bodies 12a, 12b completely. When the first and second window bodies 12a, 12b are rotated to the closed position, the torque of the linear motor 21 can bring the rotating end portion 36, the free end portion 37, and the first and second side portions 38a, 38b into close contact with the frames 24, 25, 26a, 26b, thereby airtightly closing the first and second window bodies 12a, 12b.

[0118] During normal operation, when the first and second window bodies 12a and 12b are closed and the slider 18 (lower plate 63) and the upper end 78 (connection plate 74) of the motor rod 73 of the linear-motion motor 21 are connected, if the linear-motion motor 21 is not operating due to a power outage, motor failure, electrical system failure, or other reason and ventilation is required, the first and second window bodies 12a and 12b must be opened without relying on the linear-motion motor 21. Furthermore, if an emergency such as a fire, chemical leak, or gas leak occurs in a building, or if the linear-motion motor 21 is not operating during an emergency, the first and second window bodies 12a and 12b must be quickly opened to vent smoke and gas to the outside. An example of the procedure for opening the first and second window bodies 12a and 12b when the linear-motion motor 21 is not operating and / or an emergency occurs is as follows.

[0119] As described above, by rotating the pivoting portion 90 of the handle 80 clockwise or counterclockwise, the engaging pin 75 is moved backward in the transverse direction against the biasing force of the coil spring 76, thereby releasing the connection between the upper end 78 (connecting plate 74) of the motor rod 73 of the linear motor 21 and the slider 18 (lower plate 63), allowing the slider 18 to slide independently. Note that when the handle 80 is released after the connection between the upper end 78 of the motor rod 73 and the slider 18 is released, the engaging pin 75 is urged forward in the transverse direction by the biasing force of the coil spring 76, and the abutment flange 86 of the engaging pin 75 abuts against the periphery of the through-hole 82 of the connecting plate 74, and the tip portion 85 of the engaging pin 75 protrudes forward in the transverse direction from the through-hole 82.

[0120] When the slider 18 is allowed to slide independently, the free ends 37 of the first and second window bodies 12a, 12b begin to pivot downward in the vertical direction due to the weight of the first and second window bodies 12a, 12b, and the slider 18 slides upward in the vertical direction in the movement space 60 from the lower end 61 of the guide line 17 toward the upper end 59. The traction chain 19 located in the first chain housing portion 44 moves upward in conjunction with the sliding of the slider 18 (the pivoting of the free end 37), and the sprocket 94 engaged with the traction chain 19 rotates clockwise. Note that at the initial movement to open the first and second window bodies 12a, 12b from a fully closed state, a kick-out force (extending force) from kick-out means such as a kick-out spring or kick-out damper acts on the first and second window bodies 12a, 12b.

[0121] When the sprocket 94 rotates, the first and second rotating rods 93a and 93b (first and second rotating mechanisms 20a and 20b) rotate clockwise in conjunction with the rotation of the sprocket 94, and the first and second rollers 95a and 95b rotate clockwise in conjunction with the rotation of the first and second rotating rods 93a and 93b. When the first and second rollers 95a and 95b rotate clockwise, the first and second swivel chains 13a and 13b are unwound in one direction (forward in the front-to-rear direction) from the first and second rollers 95a and 95b (see FIGS. 20 and 21).

[0122] As described above, at the initial movement (start of rotation) of rotating the first and second window bodies 12a, 12b from a closed state to an open state, the kicking force of the kicking means acting on the first and second window bodies 12a, 12b and the linearity (straightness) of the swivel chains 13a, 13b encourage (promote) the downward vertical rotation of the free ends 37 of the first and second window bodies 12a, 12b, and the kicking means and the swivel chains 13a, 13b press (push) the free ends 37 of the window bodies 12a, 12b forward in the front-to-back direction, applying a downward vertical rotation force to the free ends 37 of the window bodies 12a, 12b.

[0123] The first and second window bodies 12a, 12b rotate by utilizing the kicking force of the kicking means and the linearity of the first and second swivel chains 13a, 13b during the initial movement when their free ends 37 rotate from the closed position to the open position, and during the rotation process of the window bodies 12a, 12b after the initial movement has passed, the free ends 37 of the window bodies 12a, 12b automatically rotate downward in the vertical direction around the rotating end 36 due to the weight of the window bodies 12a, 12b.

[0124] As the free ends 37 of the first and second window bodies 12a, 12b automatically rotate downward in the vertical direction, the first and second swivel chains 13a, 13b are automatically unwound in one direction (forward in the longitudinal direction), the first and second rotating rods 93a, 93b (first and second rotating mechanisms 20a, 20b) automatically rotate clockwise, and the sprocket 94 automatically rotates clockwise. Furthermore, the traction chain 19 automatically moves upward, and the slider 18 automatically slides upward toward the upper end 59 of the guideline 17.

[0125] As described above, when the first and second swivel chains 13a and 13b are unwound in one direction (forward in the front-to-rear direction) from the first and second rollers 95a and 95b and the first and second rotating rods 93a and 93b rotate clockwise, the load points of the first and second torsion springs 97a and 97b twist in the opposite direction to the winding direction, or twist in the winding direction, with the fixed points of the arms as the torsional base ends.

[0126] When the first and second torsion springs 97a, 97b are twisted in the direction opposite to the winding direction or in the winding direction, as described above, the torsion springs 97a, 97b exert torque in the opposite direction (the winding direction or the opposite direction to the winding direction) proportional to the twist angle, and the torque of the torsion springs 97a, 97b applies a rotational force to the free ends 37 of the first and second window bodies 12a, 12b to rotate them upward in the vertical direction from the open position toward the closed position.

[0127] FIG. 22 illustrates the connection process between the motor rod 73 and the slider 18 in a separated state (disconnected state), and FIG. 23 illustrates the connection process continuing from FIG. 22. An example of the procedure for closing the window bodies 12a and 12b after the upper end 78 of the motor rod 73 is disconnected from the slider 18 and the first and second window bodies 12a and 12b have rotated from the closed state to the open state is as follows. Assume that the power supply has been restored, or a malfunction in the linear motor 21 or the electrical system has been repaired, making the linear motor 21 operable. The operator turns on the switch for the linear motor 21 (linear motor ON operation (opening operation)). When the switch is turned on, the motor rod 73 of the linear motor 21 gradually rises upward in the vertical direction, and the connection plate 74 connected to the upper end 78 of the motor rod 73 gradually approaches the lower plate 63 of the slider 18, which has moved upward in the vertical direction along the guide line 17.

[0128] After the motor rod 73 rises and the connecting plate 74 reaches the lower plate 63 of the slider 18 and the tip 85 of the engagement pin 75 reaches the inclined plate 69 of the slider 18, the motor rod 73 (connecting plate 74) rises further upward in the vertical direction, and the tip 85 of the engagement pin 75 slides along the inclined surface of the inclined plate 69, causing the engagement pin 75 to move upward in the vertical direction along the inclined surface of the inclined plate 69.

[0129] When the tip 85 of the engagement pin 75 moves upward in the vertical direction on the inclined surface of the inclined plate 69, the tip 85 of the engagement pin 75 is pressed rearward in the transverse direction by the inclined surface of the inclined plate 69, and the inclined plate 69 gradually retracts the tip 85 of the engagement pin 75 rearward in the transverse direction against the biasing force of the coil spring 76. When the tip 85 of the engagement pin 75 reaches the pin engagement hole 70 of the lower plate 63 in its retracted state, the biasing force of the coil spring 76 causes the tip 85 of the engagement pin 75 to advance (protrude) forward in the transverse direction, and the tip 85 of the engagement pin 75 engages with the pin engagement hole 70.

[0130] When the tip 85 of the engagement pin 75 engages with the pin engagement hole 70 of the lower plate 63, the slider 18 (lower plate 63) and the upper end 78 (connecting plate 74) of the motor rod 73 of the linear motor 21 are automatically connected. After the motor rod 73 is raised to automatically connect the slider 18 and linear motor 21, the stop (OFF) button is pressed to stop the raising of the motor rod 73, and then the close (ON) button (closing operation) is pressed to lower the motor rod 73 and close the window bodies 12a, 12b.

[0131] In the window opening and closing system 10, when the first and second window bodies 12a, 12b are closed, the upper end 78 (connection plate 74) of the motor rod 73 is released from the connection with the slider 18 (lower plate 63), and the slider 18 slides upward in the vertical direction in the movement space 60 from the lower end 61 of the guide line 17 toward the upper end 59, causing the traction chain 19 (pulling member) to operate upward. The upward operation of the traction chain 19 causes the sprocket 94 (first and second rotation mechanisms 20a, 20b) to rotate, and the second The first and second swivel chains 13a, 13b are unwound from the first and second rollers 95a, 95b, and the first and second window bodies 12a, 12b rotate from the closed position to the open position. By disconnecting the upper end 78 of the motor rod 73 from the slider 18, the window bodies 12a, 12b can be rotated from the closed state to the open state, and the first and second window bodies 12a, 12b can be smoothly rotated from the closed state to the open state, making it possible to easily open the window bodies 12a, 12b.

[0132] When the connection between the upper end 78 of the motor rod 73 and the slider 18 is released when the first and second window bodies 12a, 12b are closed and the free ends 37 of the first and second window bodies 12a, 12b initially rotate from the closed position to the open position, a downward vertical rotation force is applied to the free ends 37 of the window bodies 12a, 12b by utilizing the kick-out force of the kick-out means (not shown) and the linear motion (pay-out force) of the first and second swivel chains 13a, 13b.Therefore, by utilizing the kick-out force of the kick-out means and the pay-out force of the first and second swivel chains 13a, 13b, the window bodies 12a, 12b can be reliably rotated when the window bodies 12a, 12b initially open. During the pivoting process of the window bodies 12a, 12b after the initial movement has elapsed, the free ends 37 of the window bodies 12a, 12b automatically pivot downward in the vertical direction due to the weight of the window bodies 12a, 12b, so the window bodies 12a, 12b can be smoothly pivoted from a closed state to an open state, and the window bodies 12a, 12b can be easily opened. When the connection between the upper end 78 of the motor rod 73 and the slider 18 is released in the window opening and closing system 10, the slider 18 slides upward in the vertical direction along the guide line 17 formed in the vertical center area of ​​the installation unit 14, and the window bodies 12a, 12b are opened, so the first and second window bodies 12a, 12b can be pivoted from a closed state to an open state and the window bodies 12a, 12b can be opened easily and quickly without requiring much effort or time.

[0133] In the window opening and closing system 10, when the window bodies 12a, 12b are initially opened, the free ends 37 of the first and second window bodies 12a, 12b rotate due to the kicking force of the kicking means and the linearity (pull-out force) of the first and second swivel chains 13a, 13b, and during the rotation process after the initial movement, the free ends 37 of the window bodies 12a, 12b automatically rotate downward in the vertical direction due to the weight of the first and second window bodies 12a, 12b, so that the window bodies 12a, 12b can be opened in one go without the need to manually slide the slider 18.

[0134] In the event of an emergency such as a fire, chemical leak, or gas leak in a building, or if the linear motor 21 does not operate due to a power outage, motor failure, or electrical system failure during an emergency, the window opening and closing system 10 can quickly release the connection between the upper end 78 (connecting plate 74) of the motor rod 73 of the linear motor 21 and the slider 18 (lower plate 63) by rotating the handle 80 clockwise or counterclockwise and retracting the engagement pin 75 rearward in the cross direction against the biasing force of the coil spring 76. After the connection between the upper end 78 of the motor rod 73 and the slider 18 is released, the window bodies 12a, 12b are opened all at once. Therefore, in the event of an emergency or when the linear motor 21 is not operating during an emergency, the first and second window bodies 12a, 12b can be smoothly rotated from the closed state to the open state to quickly open the window bodies 12a, 12b, and harmful smoke and toxic gases inside the room can be reliably vented to the outside.

[0135] Furthermore, in the event of an emergency or when an emergency occurs and the linear motor 21 is not operating, when the first and second window bodies 12a, 12b are in a fully closed state, not only can the connection between the upper end 78 (connecting plate 74) of the motor rod 73 and the slider 18 (lower plate 63) be released to open the first and second window bodies 12a, 12b fully, but also when the window bodies 12a, 12b are open at a predetermined angle, the connection between the upper end 78 of the motor rod 73 and the slider 18 can be released to open the window bodies 12a, 12b fully.

[0136] In the case where the linear motor 21 stops working due to a power outage, motor failure, electrical system failure, or the like, and ventilation is required, the window opening / closing system 10 can quickly open the first and second window bodies 12a, 13b by retracting the tip 85 of the engagement pin 75 from the pin engagement hole 70 to release the connection between the slider 18 and the motor rod 73, thereby rotating the first and second window bodies 12a, 13b from a closed state to an open state, and therefore ventilation can be performed by releasing the connection between the upper end 78 of the motor rod 73 and the slider 18, even if the linear motor 21 stops working. The window opening / closing system 10 does not require the installation of an emergency power supply facility for operating the linear motor 21 in the event of a power outage, which allows for simplification of the system 10 (equipment).

[0137] In the window opening / closing system 10, when the upper end 78 of the motor rod 73 and the slider 18 are separated (the engagement pin 75 has withdrawn from the pin engagement hole 70), by raising the motor rod 73, the inclined plate 69 of the lower plate 63 presses the tip 85 of the engagement pin 75 backward against the force of the coil spring 76, and when the tip 85 of the engagement pin 75 reaches the pin engagement hole 70, the force of the coil spring 76 causes the tip 85 of the engagement pin 75 to move forward and engage into the pin engagement hole 70.Therefore, by raising the motor rod 73 of the linear motor 21 upward in the vertical direction, the tip 85 of the engagement pin 75 can be automatically engaged into the pin engagement hole 70, and compared to manually connecting the slider 18 and motor rod 73 from the disconnected state, the slider 18 and motor rod 73 can be reliably connected without any hassle.

[0138] When the linear motor 21 is not operating, the first and second window bodies 12a, 12b can be manually closed using the slider 18 (upper plate 62 and lower plate 63) while the window bodies 12a, 12b are open. To manually close the window bodies 12a, 12b, the slider 18 is grasped and slid (pushed down) from the upper end 59 of the guide line 17 toward the lower end 61. As described above, the torque (repulsive force) of the first and second torsion springs 97a, 97b adjusts the load acting on the slider 18 to approximately 1.5 to 2 kgf when pivoting the window bodies 12a, 12b from the lower to the upper side. When sliding the slider 18 downward, a grippable handle extending forward from the slider 18 is preferably attached, although not shown. By using (holding) the handle, the slider 18 can be easily slid downward.

[0139] When the slider 18 is slid downward, the traction chain 19 moves downward in the up-and-down direction in conjunction with the sliding of the slider 18, and the sprocket 94 engaged with the traction chain 19 rotates counterclockwise. When the sprocket 94 rotates, the first and second rotating rods 93a, 93b (first and second rotating mechanisms 20a, 20b) rotate counterclockwise in conjunction with the rotation of the sprocket 94, and the first and second swivel chains 13a, 13b are wound in the other direction (rearward in the front-to-rear direction) around the first and second rollers 95a, 95b.

[0140] As the first and second swivel chains 13a, 13b are wound around the first and second rollers 95a, 95b, the free ends 37 of the first and second window bodies 12a, 12b begin to swivel upward in the vertical direction from the open position toward the closed position. Because a swivel force is applied to the free ends 37 of the first and second window bodies 12a, 12b by the torque of the first and second torsion springs 97a, 97b to rotate them from the open position toward the closed position, the entire weight of the window bodies 12a, 12b is not applied to the sliding of the slider 18, and a load (in the range of 1.5 to 2 kgf) obtained by subtracting the repulsive force of the torsion springs 97a, 97b from the weight of the window bodies 12a, 12b acts on the slider 18.

[0141] The first and second window bodies 12a, 12b are rotated from the open state to the closed state by sliding (pushing down) the slider 18 to the lower end 61 of the guideline 17. As the slider 18 is slid to the lower end 61 of the guideline 17, the tip 85 of the engagement pin 75 slides on the inclined surface of the inclined plate 69, and the inclined plate 69 causes the tip 85 of the engagement pin 75 to retract rearward in the intersecting direction against the biasing force of the coil spring 76, so that the tip 85 of the engagement pin 75 is engaged with the pin engagement hole 70, connecting the slider 18 (lower plate 63) to the upper end 78 (connecting plate 74) of the motor rod 73 of the linear motion motor 21.

[0142] When the first and second window bodies 12a, 12b are manually closed using the slider 18 and the slider 18 (lower plate 63) is connected to the upper end 78 (connecting plate 74) of the motor rod 73 of the linear motor 21, the first and second window bodies 12a, 12b rotate to the fully closed position, the rotating end 36 airtightly adheres to the lower frame 25, the first and second side bodies 38a, 38b airtightly adhere to the first and second side frames 26a, 26b, and the free end 37 airtightly adheres to the upper frame 24.

[0143] In the window opening and closing system 10, the slider 18 slides downward from the upper end 59 of the guideline 17 to operate the traction chain 19 (traction member) downward, and the downward operation of the traction chain 19 rotates the sprocket 94 (first and second rotating mechanisms 20a, 20b), winding the first and second swivel chains 13a, 13b onto the first and second rollers 95a, 95b and rotating the first and second window bodies 12a, 12b from the open state to the closed state. Therefore, the window bodies 12a, 12b can be rotated from the open state to the closed state simply by sliding the slider 18 downward in the vertical direction, and even when closing the window bodies 12a, 12b manually, the first and second window bodies 12a, 12b can be smoothly rotated from the open state to the closed state without requiring much effort or time, and the window bodies 12a, 12b can be easily closed.

[0144] When manually closing the open first and second window bodies 12a, 12b with the window opening and closing system 10, it is not necessary to rotate the winding handle multiple times as in the prior art; instead, the slider 18 can be slid vertically downward, and the open window bodies 12a, 12b can be closed in a short time with a simple sliding operation. When the slider 18 and the motor rod 73 are separated from each other, the window opening and closing system 10 smoothly rotates the window bodies 12a, 12b from the open state to the closed state by sliding the slider 18 vertically downward along the guide line 17 formed in the vertical center area of ​​the installation unit 14, thereby easily closing the window bodies 12a, 12b.

[0145] In the window opening and closing system 10, after the first and second window bodies 12a, 12b are manually closed using the slider 18, the slider 18 (lower plate 63) is connected to the upper end 78 (connecting plate 74) of the motor rod 73 of the linear motor 21, so that the first and second window bodies 12a, 12b rotate to the fully closed position, the rotating end 36 hermetically seals against the lower frame 25, the first and second side bodies 38a, 38b hermetically seal against the first and second side frames 26a, 26b, and the free end 37 hermetically seals against the upper frame 24. Therefore, the window bodies 12a, 12b are not left in an incompletely closed state, and the window bodies 12a, 12b can be reliably and airtightly closed in a complete state. [Explanation of symbols]

[0146] 10 Window opening and closing system 11a First window frame 11b Second window frame 12a First window body (first shoji screen) 12b Second window body (second shoji screen) 13a 1st swivel chain 13b Second swivel chain 14 Erection Unit 15a First drive unit 15b Second drive unit 16 Swivel operating means (chain operating means) 17 Guidelines 18 Slider 19 Traction chain (traction member) 20a First rotation mechanism 20b Second rotation mechanism 21 Linear motor 22 Connection mechanism 23 Uncoupling mechanism 24 Upper Frame 25 Lower Frame 26a First side frame 26b Second side frame 27 Upper frame plate 28 Upper contact plate 29 Lower frame plate 30 Lower abutment plate 31 First side frame plate 32 First contact plate 33 Second side frame plate 34 Second abutment plate 35 Window Installation 36 Rotating end (rotating frame) 37 Free end (swivel frame) 38a First side portion (first side frame) 38b Second side portion (second side frame) 39 Shoji metal fittings 40 First erection plate 41 Second erection plate 42 base plate 43 Cover Plate 44 First chain accommodating recess (first guide recess) 45 Second chain accommodating recess (second guide recess) 46 storage spaces 47 First guide plate 48 Second guide plate 49 First guide base plate 50 Third guide plate 51 4th guide plate 52 Second guide base plate 53 Connecting plate 54 Plate 1 55 Second Plate 56 Third Plate 57 Bearing plate 58a First Storage Space 58b Second Storage Space 59 Upper end 60 Middle section (movement space) 61 Bottom end 62 Upper Plate 63 Lower Plate 64a Sliding rail 64b Sliding rail 64c sliding rail 65 One end 66 First connecting plate 67 Screw hole (screw hole) 68 Second connecting plate 69 Inclined Plate 70 Pin insertion hole 71 Dimension adjustment screw 72 cylinders 73 Motor Rod 74 Connecting plate 75 Engagement pin 76 Coil spring (spring) 77 Holder 78 Upper end 79 Opening edge 80 Handle 81 Connecting rod 82 Through hole 83 Storage unit 84 Spring contact part 85 Tip 86 Abutting flange 87 Opening 88 Rear end 89 Shaft 90 Swivel section 91 One Edge 92 Other end 93a First rotating rod 93b Second rotating rod 94 sprocket 95a 1st Roller 95b Second Roller 96a First ring mounting drum 96b Second ring mounting drum 97a 1st torsion spring 97b Second torsion spring

Claims

1. A window opening and closing system comprising: a window body whose free end pivots in the vertical direction around a rotation end rotatably installed on a window frame; a pivoting bar connected to the free end of the window body to pivot the window body from a closed state to an open state and from the open state to the closed state; and a pivoting bar operating means that extends the pivoting bar in one direction to pivot the window body from the closed state to the open state, or pulls the pivoting bar in the other direction to pivot the window body from the open state to the closed state, The revolving bar operating means is formed of a guideline extending in the vertical direction, a traction member that moves up and down along the guideline, a slider that is installed at one end of the traction member and slides up and down along the guideline, a rotation mechanism that rotates with the up and down movement of the traction member and pays out the revolving bar and winds it up, and a linear motor that is installed below the guideline and moves the traction member up and down, the linear motor comprises a cylinder fixed below the guideline, and a motor rod that rises upward in the vertical direction from an upper end of the cylinder and then descends downward in the vertical direction to enter the interior of the cylinder, the upper end of the motor rod is connected to one end of the pulling member, the slider is connected to the upper end of the motor rod via a predetermined connecting mechanism, and is separated from the upper end of the motor rod by releasing the connecting mechanism, the connecting mechanism is formed from a pin engagement hole drilled in the slider, a connecting plate installed at the upper end of the motor rod, an engagement pin installed on the connecting plate and moving forward or backward in a direction intersecting the up-down direction, the tip end of which protrudes from the connecting plate and engages with the pin engagement hole when the connecting plate moves forward, and the tip end of which retracts from the pin engagement hole when the connecting plate moves backward, a biasing means for biasing the engagement pin to move forward, and a holder that houses the engagement pin and the biasing means and has an opening that opens to the side of the rear end of the engagement pin, The window opening and closing system is characterized in that the linear motor operates the traction member in an upward, vertical direction, and while rotating the rotation mechanism, the swivel bar is extended in one direction to rotate the window body from a closed state to an open state, and the linear motor operates the traction member in a downward, vertical direction, and while rotating the rotation mechanism, the swivel bar is pulled in the other direction to rotate the window body from an open state to a closed state.

2. 2. The window opening and closing system of claim 1, wherein the slider includes an inclined plate that inclines in the forward direction of the engagement pin as it moves downward in the vertical direction, and in the connecting mechanism, when the engagement pin is in a disconnected state in which it has withdrawn from the pin engagement hole, the motor rod gradually rises upward in the vertical direction and the tip of the engagement pin reaches the inclined plate of the slider, and the inclined plate presses the tip of the engagement pin backward against the biasing force of the biasing means, and when the tip of the engagement pin reaches the pin engagement hole located directly above the inclined plate, the biasing force of the biasing means causes the tip of the engagement pin to advance and engage into the pin engagement hole.

3. The window opening and closing system according to claim 1 or claim 2, further comprising a disconnection mechanism that, in a connected state in which the engagement pin is engaged in the pin engagement hole, retracts the engagement pin against the biasing force of the biasing means, causing the engagement pin to exit the pin engagement hole and release the connection between the motor rod and the slider.

4. 4. The window opening and closing system of claim 3, wherein the disconnection mechanism is formed by an opening edge of the holder that surrounds the opening of the holder and slopes from the tip end side of the engagement pin toward the rear end side, and a handle that supports the rear end of the engagement pin, one end edge of which abuts against the opening edge of the holder and is exposed from the opening, and which rotates clockwise or counterclockwise; and in the disconnection mechanism, when the handle is rotated clockwise or counterclockwise, one end edge of the handle slides along the opening edge and the handle gradually retreats, and as the handle retreats, the engagement pin retreats against the biasing force of the biasing means, and the tip end of the engagement pin retreats from the pin engagement hole, thereby releasing the connection between the motor rod and the slider.

5. 5. A window opening and closing system as described in any one of claims 1 to 4, wherein the traction member is a traction chain connected at one end to the slider and moving up and down as the slider slides up and down, and the rotation mechanism is formed by a rotating rod rotatably mounted on the window frame and extending horizontally, a sprocket formed on one side of the rotating rod with which the traction chain engages and which rotates as the traction chain moves up and down, and a roller formed on the other side of the rotating rod to which the swivel bar is connected and which pays out and winds up the swivel bar as the sprocket rotates.

6. 6. The window opening and closing system according to claim 5, wherein the window frame is formed of upper and lower frames extending laterally and spaced apart in the vertical direction, and first and second side frames extending vertically and spaced apart in the horizontal direction, the window body having the rotating end portion rotatably connected to the lower frame and airtightly contacting the lower frame in the closed state, and the free end portion which pivots to a closed position in airtight contact with the upper frame in the closed state and pivots to an open position vertically below in the open state, the window opening and closing system including an erection unit extending downward from either the first side frame or the second side frame, the guideline being formed on the erection unit, and the cylinder of the linear motor being fixed to the erection unit.

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

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