JP2024052972A - Shutter device seat structure - Google Patents

Abstract

[Problem] To provide a seat plate structure for a shutter device that allows the strength of the shutter curtain in the thickness direction of the seat plate to be adjusted as necessary. [Solution] The shutter curtain moves to open and close while being guided by guide rails arranged on both the left and right sides, and the end of the shutter curtain on the closing side is the seat plate 4, and on this seat plate 4, for example, a plurality of rod-shaped members 23-28 are arranged via storage members 21, 22 so that they can be unfolded and folded in the thickness direction of the shutter curtain, and among these rod-shaped members 23-28, the length direction of the rod-shaped members 23, 26 is the length direction of the seat plate 4, and they serve as reinforcing members 45, 46 that are parallel to the seat plate 4 both when unfolded and when folded. [Selected Figure] Figure 5

Description

The present invention relates to a seat structure for a shutter device installed at the entrances and exits of buildings, and in particular to a seat structure that allows adjustment of the strength of the seat provided at the closing end of a shutter curtain that opens and closes.

As shown in the following Patent Document 1, a shutter device installed at the entrances and exits of buildings is composed of guide rails arranged on both the left and right sides, and a shutter curtain that is guided by these guide rails to open and close, with the closing end serving as a seat plate.

JP 2020-70672 A

In shutter devices installed at building entrances and exits, for example, during strong winds caused by a typhoon, the shutter curtain is subjected to large wind pressure when it is fully closed. For this reason, not only in shutter devices in which the ends of the seat plate in the length direction, which has a length dimension in the width direction of the shutter curtain (left and right) are not inserted inside the guide rail, but also in shutter devices in which at least a portion of each end of the seat plate in the length direction is inserted inside the guide rail, there is a risk that the seat plate will be significantly bent and deformed in the thickness direction of the shutter curtain, causing a gap to form between the seat plate and the floor. For this reason, when there is a risk that the shutter curtain will be subjected to large wind pressure, it is necessary to increase the strength of the seat plate in the thickness direction of the shutter curtain.

The object of the present invention is to provide a seat plate structure for a shutter device that allows the strength of the seat plate in the thickness direction of the shutter curtain to be adjusted as needed.

The seat plate structure of the shutter device according to the present invention is a seat plate structure of a shutter device that includes guide rails arranged on both the left and right sides, and a shutter curtain that is guided by these guide rails to open and close, with the end on the closing side being the seat plate, and is characterized in that a number of rod-shaped members are arranged on the seat plate so that they can be unfolded and folded, and by unfolding these rod-shaped members, the strength of the shutter curtain in the thickness direction of the seat plate is increased.

In this way, in the seat plate structure of the shutter device according to the present invention, multiple rod-shaped members are arranged on the seat plate so that they can be unfolded and folded. By unfolding these rod-shaped members, the strength of the shutter curtain in the thickness direction of the seat plate increases. Therefore, when it is required to increase the strength of the shutter curtain in the thickness direction of the seat plate, for example, in cases where it is expected that the shutter curtain will be subjected to large wind pressure due to strong typhoon winds, the strength of the seat plate can be increased by unfolding the multiple rod-shaped members that were arranged folded on the seat plate.

In addition, when there is no longer a need to increase the strength of the shutter curtain in the thickness direction of the seat plate due to the passage of a typhoon or other reasons, the multiple rod-shaped members can be folded and placed on the seat plate, thereby reducing the overall dimensions of the seat plate including the multiple rod-shaped members and allowing the shutter curtain to be opened and closed.

In the present invention described above, the direction in which the multiple rod-shaped members are deployed and folded relative to the seat plate may be the up-down direction, or the left-right direction which is the width direction of the shutter curtain, or the thickness direction of the shutter curtain, or a direction oblique to the up-down direction and the left-right direction, or a direction oblique to the up-down direction and the thickness direction of the shutter curtain, or a direction oblique to the left-right direction and the thickness direction of the shutter curtain.

If the direction in which the multiple rod-shaped members are deployed and folded relative to the seat plate is the thickness direction of the shutter curtain, then the direction in which the strength of the seat plate is increased is the thickness direction of the shutter curtain, and therefore it is possible to effectively increase the strength of the seat plate in the thickness direction of the shutter curtain.

In addition, by unfolding a plurality of rod-shaped members arranged on the seat plate so that they can be unfolded and folded in the thickness direction of the shutter curtain, a structure for increasing the thickness direction of the shutter curtain for the seat plate can be achieved by unfolding the rod-shaped members in various forms. One example of such a form is that the unfolded rod-shaped members include a reinforcing member that becomes parallel or approximately parallel to the seat plate when unfolded and increases the strength of the shutter curtain in the thickness direction for the seat plate, and another example of such a form is that two rod-shaped members whose base ends are arranged apart in the length direction of the seat plate, which is the width direction of the shutter curtain, are each swung about the base end to connect the tips of these rod-shaped members, thereby forming a triangular structure with these rod-shaped members and the seat plate.

Of these, if the structure for increasing the thickness direction of the shutter curtain for the seat board is such that the multiple deployed rod-shaped members include a reinforcing member that becomes parallel or nearly parallel to the seat board when deployed, thereby increasing the strength of the shutter curtain for the seat board in the thickness direction, then since this reinforcing member becomes parallel or nearly parallel to the seat board, the strength of this reinforcing member can be utilized to increase the strength of the shutter curtain for the seat board in the thickness direction.

The inclusion of a reinforcing member among the multiple deployed rod-shaped members that becomes parallel or nearly parallel to the seat plate when deployed, thereby increasing the strength of the shutter curtain in the thickness direction for the seat plate, can be achieved, for example, by making the reinforcing member form part of a parallelogram link mechanism that allows the reinforcing member to be deployed and folded while remaining parallel to the seat plate.

To explain this in more detail, of the multiple rod-shaped members arranged on the seat plate, two rod-shaped members that together with the seat plate and the reinforcing member form a parallelogram link mechanism are arranged apart in the length direction of the seat plate, which is the width direction of the shutter curtain, in order to connect the seat plate and the reinforcing member, and these rod-shaped members are arranged at an angle to the length direction of the seat plate so that they cannot swing relative to the seat plate, thereby allowing the reinforcing member to increase the strength of the seat plate in the thickness direction of the shutter curtain.

When the seat plate structure of the shutter device according to the present invention is configured in this manner, the angle that the two rod-shaped members make with respect to the length direction of the seat plate may be 90 degrees or an angle other than 90 degrees, so long as these rod-shaped members are unable to swing relative to the seat plate. Furthermore, making the two rod-shaped members unable to swing relative to the seat plate can be achieved, for example, by bridging a bridge member between the rod-shaped members and the seat plate, or by bridging a bridge member between the rod-shaped members and the reinforcing member.

In addition, when the seat plate structure of the shutter device according to the present invention is based on the parallelogram link mechanism described above, two parallelogram link mechanisms can be provided, one above the other, and the angles of the two rod-shaped members in each of these parallelogram link mechanisms relative to the length direction of the seat plate can be set in opposite directions, and the two reinforcing members in the two parallelogram link mechanisms can be connected with a fastener, thereby making it impossible for the two rod-shaped members in each of the two parallelogram link mechanisms to swing relative to the seat plate.

When the seat plate structure of the shutter device according to the present invention is constructed using two parallelogram link mechanisms, one above the other, the two rod-shaped members in each of these parallelogram link mechanisms make mutually opposite angles with respect to the length direction of the seat plate at angles other than 90 degrees.

In addition, as described above, two parallelogram link mechanisms are provided, one above the other, and the angles of the two rod-shaped members in each of these parallelogram link mechanisms relative to the length direction of the seat plate are opposite to each other, and the two reinforcing members in the two parallelogram link mechanisms are connected with a fastener, so that the two rod-shaped members in each of the two parallelogram link mechanisms cannot swing relative to the seat plate. In this case, the fastener for connecting the two reinforcing members in the two parallelogram link mechanisms may be a fastener for connecting the two reinforcing members to the seat plate when the two reinforcing members are folded and placed on the seat plate.

As a result, when the two reinforcing members are folded and placed on the seat plate, the fasteners for connecting these reinforcing members to the seat plate can be used to connect the two reinforcing members in the two parallelogram linkages, making it possible to use the same fastener for both purposes.

The number of fasteners for connecting the two reinforcing members of the two parallelogram link mechanisms to prevent the two rod-shaped members in each of the two parallelogram link mechanisms from swinging relative to the seat plate may be one. However, if the number of fasteners is two, arranged in the longitudinal direction of the reinforcing member, which is the longitudinal direction of the seat plate, it is preferable to connect the two reinforcing members to the seat plate when folded and arranged on the seat plate with the two fasteners, and to make the distance between the two fasteners larger when the two reinforcing members are connected to the seat plate than the distance between the two fasteners when the two reinforcing members folded and arranged on the seat plate are connected to the seat plate.

According to this, when the two reinforcing members are folded and placed on the seat plate, the strength of the shutter curtain in the thickness direction for the seat plate is increased by the two reinforcing members when these reinforcing members are joined to the seat plate by the two fasteners. However, in order to prevent the two rod-shaped members in each of the two parallelogram link mechanisms from swinging relative to the seat plate, the distance between the two fasteners when the two reinforcing members are joined is made larger than the distance between the two fasteners when the two reinforcing members are folded and placed on the seat plate and joined to the seat plate. This makes it possible to increase the strength of the shutter curtain in the thickness direction for the seat plate by the respective lengths of the two reinforcing members corresponding to the distance between the fasteners. Therefore, the strength of the shutter curtain in the thickness direction for the seat plate that can be increased by the two unfolded reinforcing members can be made larger than the strength of the shutter curtain in the thickness direction for the seat plate when the two reinforcing members are folded and placed on the seat plate and joined to the seat plate by the two fasteners.

When the seat plate structure of the shutter device according to the present invention is constructed in this manner, in order to prevent the two rod-shaped members in each of the upper and lower parallelogram link mechanisms from swinging relative to the seat plate, it is preferable that the distance between the two fasteners when the two reinforcing members are connected be slightly smaller than the length dimension of these reinforcing members.

As a result, the two fasteners join the two reinforcing members near both end faces in the longitudinal direction of these reinforcing members, making it possible to utilize the roughly entire length dimension of these reinforcing members to increase the strength of the shutter curtain in the thickness direction of the seat plate.

In addition, in the seat plate structure of the shutter device according to the present invention, as described above, when the direction of unfolding and folding of the multiple rod-shaped members relative to the seat plate is the thickness direction of the shutter curtain, and when these rod-shaped members include a reinforcing member that becomes parallel or approximately parallel to the seat plate when unfolded to increase the strength of the shutter curtain in the thickness direction of the seat plate, two of the multiple rod-shaped members may be arranged apart in the length direction of the seat plate, which is the width direction of the shutter curtain, and the base ends of each of these rod-shaped members may be swingably connected to the seat plate. Also, one end of the reinforcing member in the length direction may be swingably connected to one of the two rod-shaped members, and the other end of the reinforcing member in the length direction when it becomes parallel or approximately parallel to the seat plate when unfolded to increase the strength of the shutter curtain in the thickness direction of the seat plate may be swingably connected to the other of the two rod-shaped members that are at opposite angles to the length direction of the seat plate by swinging it relative to the seat plate about the base end, and these rod-shaped members at this time may be made non-swingable about the base end.

Even if the seat plate structure of the shutter device according to the present invention is configured in this way, the reinforcing member that is parallel or nearly parallel to the seat plate when deployed can increase the strength of the shutter curtain in the thickness direction of the seat plate.

As described above, the direction in which the multiple rod-shaped members are deployed and folded relative to the seat plate is the thickness direction of the shutter curtain, and among these rod-shaped members are included reinforcing members that become parallel or approximately parallel to the seat plate when deployed, in order to increase the strength of the shutter curtain in the thickness direction for this seat plate. Two of the multiple rod-shaped members are positioned apart in the length direction of the seat plate, which is the width direction of the shutter curtain, and the base ends of each of these rod-shaped members are connected to the seat plate so as to be able to swing freely. Also, one end of the reinforcing member in the length direction is connected to one of the two rod-shaped members so as to be able to swing freely. When the reinforcing member is unfolded to be parallel or approximately parallel to the seat plate, thereby increasing the strength of the shutter curtain in the thickness direction of the seat plate, the other end of the reinforcing member in the length direction can be connected to the other of the two rod-shaped members that are at opposite angles to the length direction of the seat plate by swinging relative to the seat plate around their respective base ends with a fastener, and in this case, when these rod-shaped members cannot swing around their respective base ends, the fastener can be used to connect the two rod-shaped members to the seat plate when they are folded and placed on the seat plate.

As a result, when the two rod-shaped members are folded and placed on the seat plate, the other end of the reinforcing member in the longitudinal direction can be connected to the other of the two rod-shaped members using a fastener for connecting the rod-shaped members to the seat plate, thereby enabling the fastener to be used for multiple purposes.

As described above, the direction in which the multiple rod-shaped members are deployed and folded relative to the seat plate is the thickness direction of the shutter curtain, and among these rod-shaped members are included reinforcing members that become parallel or approximately parallel to the seat plate when deployed, thereby increasing the strength of the shutter curtain in the thickness direction for this seat plate. Two of the multiple rod-shaped members are arranged apart in the length direction of the seat plate, which is the width direction of the shutter curtain, and the base ends of each of these rod-shaped members are connected to the seat plate so as to be able to swing freely. Also, one end of the reinforcing member in the length direction is connected to one of the two rod-shaped members so as to be able to swing freely, and when deployed, the reinforcing member becomes parallel or approximately parallel to the seat plate. When the other end of the reinforcing member in the longitudinal direction is parallel to the seat plate and the strength of the shutter curtain in the thickness direction of the seat plate is increased, the other end of the reinforcing member in the longitudinal direction of the seat plate can be pivoted relative to the seat plate about its base end to form opposite angles to each other. In the case where these rod-shaped members cannot be pivoted about their respective base ends, the pivoting device can be a first pivoting device, and the tips of the two rod-shaped members in the longitudinal direction of the seat plate can be pivoted relative to the seat plate about its base end to form opposite angles to each other with a second pivoting device.

As a result, the tip ends of the two rod-shaped members are connected to each other by the second fastener, making it possible to prevent these rod-shaped members from swinging about their respective base ends.

When the seat plate structure of the shutter device according to the present invention is configured in this manner, the first and second fasteners described above may be fasteners for fastening the two rod-shaped members to the seat plate when the rod-shaped members are folded and placed on the seat plate.

As a result, when the two rod-shaped members are folded and placed on the seat plate, the first fastener and the second fastener for connecting the rod-shaped members to the seat plate can be used to connect the other end of the reinforcing member in the longitudinal direction to the other of the two rod-shaped members, and the second fastener can be used to connect the tips of the two rod-shaped members to each other, so that the first fastener and the second fastener can be used for both purposes.

In addition, when the two rod-shaped members are folded and placed on the seat plate in this manner, if these rod-shaped members and the seat plate are joined by the first and second fasteners, it is preferable that the length from the one end to the other end in the longitudinal direction of the reinforcing member is made greater than the distance between the first and second fasteners that join the two rod-shaped members to the seat plate when folded and placed on the seat plate.

According to this, when the two rod-shaped members are folded and placed on the seat plate, and the rod-shaped members and the seat plate are connected with the first and second fasteners, the strength of the shutter curtain in the thickness direction for the seat plate is increased by the two rod-shaped members, but by making the length from one end to the other end in the longitudinal direction of the reinforcing member greater than the distance between the first and second fasteners that connect the two rod-shaped members to the seat plate when folded and placed on the seat plate, the strength of the shutter curtain in the thickness direction for the seat plate can be sufficiently increased by effectively utilizing the length dimension of almost the entire reinforcing member.

In the seat plate structure of the shutter device according to the present invention described above, the multiple rod-shaped members arranged on the seat plate in an unfoldable and foldable manner may be arranged directly on the seat plate, or a storage member may be provided on the seat plate, and when the multiple rod-shaped members are folded and arranged on the seat plate, these rod-shaped members may be stored inside the storage member.

In this way, by providing a storage member on the seat plate and storing the rod-shaped members inside the storage member when the rod-shaped members are folded and placed on the seat plate, the storage member can effectively protect the rod-shaped members from external forces, etc. when they are folded and placed on the seat plate.

In addition, when the multiple rod-shaped members are folded and placed on the seat board in this manner, a storage member for storing these rod-shaped members inside is provided on the seat board, and, as described above, if the direction in which the multiple rod-shaped members unfold and fold relative to the seat board is the thickness direction of the shutter curtain, it is preferable that the storage member be formed from a channel member that opens toward the thickness direction of the shutter curtain.

As a result, the storage member for storing the multiple rod-shaped members inside when folded and placed on the seat plate is formed of a channel member that opens toward the thickness direction of the shutter curtain, so that the multiple rod-shaped members can be unfolded and folded more reliably and effectively in the thickness direction of the shutter curtain relative to the seat plate.

The seat plate structure of the shutter device according to the present invention described above can be applied to various shutter devices in which the shutter curtain is expected to be subjected to pressure such as wind pressure in the thickness direction of the shutter curtain. One such shutter device is an entrance shutter device that opens and closes the entrance to a building, garage, etc., with a shutter curtain, and another shutter device is a window shutter device. Furthermore, the seat plate structure of the shutter device according to the present invention can also be applied to disaster prevention shutter devices in which the pressure of flames, smoke, etc., and negative pressure due to exhaust air act on the shutter curtain that is fully closed to form a disaster prevention compartment in the event of a fire, etc., and can also be applied to shutter devices in which the shutter curtain is fully closed to waterproof the shutter curtain.

Furthermore, the seat plate structure of the shutter device according to the present invention may be applied to shutter devices to be installed in newly constructed buildings, renovated shutter devices, and may also be applied to shutter devices that have already been installed.

The seat plate structure of the shutter device according to the present invention can be applied to slat-type shutter devices in which the entire or nearly entire or part of the shutter curtain excluding the seat plate is formed by connecting a large number of slats, panel-type shutter devices formed by connecting a number of panels, sheet-type shutter devices formed from a sheet, and even composite-type shutter devices formed from a combination of these components.

Furthermore, each of the multiple rod-shaped members used in the seat plate structure of the shutter device according to the present invention may be formed from a channel material, an angle material, a flat bar, or a hollow or solid member with a square or circular cross section.

The present invention has the advantage that the strength of the shutter curtain in the thickness direction for the seat plate can be adjusted as needed.

FIG. 1 is a front view showing an entire shutter device to which a seat plate structure according to a first embodiment of the present invention is applied. FIG. 2 is a cross-sectional view taken along line S2-S2 of FIG. FIG. 3 is a cross-sectional view taken along line S3-S3 in FIG. 1, showing a state in which the shutter curtain is fully closed. FIG. 4 is a perspective view showing the seat plate shown in FIGS. 1 to 3 and multiple rod-shaped members arranged on the seat plate so as to be unfoldable and foldable, and shows the state when the multiple rod-shaped members are folded. FIG. 5 is a diagram showing a state in which a parallelogram link mechanism is formed by unfolding the multiple rod-shaped members shown in FIG. FIG. 6 is a plan view showing a state in which the upper parallelogram link mechanism of the two upper and lower parallelogram link mechanisms shown in FIG. 5 is formed. FIG. 7 is a plan view showing a state in which the lower parallelogram link mechanism of the two upper and lower parallelogram link mechanisms shown in FIG. 5 is formed. FIG. 8 is a plan view showing a state in which two parallelogram link mechanisms, one above the other and one below, are formed and reinforcing members constituting a part of these parallelogram link mechanisms are joined together by a fastener. FIG. 9 is a view similar to FIG. 1, showing a seat panel structure according to a second embodiment. FIG. 10 is a cross-sectional view taken along line S10-S10 in FIG. FIG. 11 is a view similar to FIG. 4, showing a seat panel structure according to the second embodiment. FIG. 12 is a view similar to FIG. 5, showing a seat panel structure according to the second embodiment. FIG. 13 is a view similar to FIG. 6, showing a seat panel structure according to the second embodiment. FIG. 14 is a view similar to FIG. 7, showing a seat panel structure according to the second embodiment. FIG. 15 is a view similar to FIG. 8, showing a seat panel structure according to the second embodiment. FIG. 16 is a view similar to FIG. 1, showing a seat panel structure according to a third embodiment. FIG. 17 is a cross-sectional view taken along line S17-S17 in FIG. FIG. 18 is a view similar to FIG. 4, showing a seat panel structure according to a third embodiment. FIG. 19 is a perspective view showing a state in which two of the multiple rod-shaped members shown in FIGS. 17 and 18 are deployed. FIG. 20 is a view similar to FIG. 5, showing a seat panel structure according to a third embodiment. FIG. 21 is a view similar to FIGS. 6 and 7, showing a seat panel structure according to a third embodiment. FIG. 22 is a view similar to FIG. 8, showing a seat panel structure according to a third embodiment. FIG. 23 is a view similar to FIG. 1, showing a seat panel structure according to a fourth embodiment. FIG. 24 is a cross-sectional view taken along line S24-S24 in FIG. FIG. 25 is a view similar to FIG. 4, showing a seat panel structure according to a fourth embodiment. FIG. 26 is a view similar to FIG. 19, showing a seat panel structure according to a fourth embodiment. FIG. 27 is a view similar to FIG. 20, showing a seat panel structure according to a fourth embodiment. FIG. 28 is a view similar to FIG. 21, showing a seat panel structure according to a fourth embodiment. FIG. 29 is a view similar to FIG. 22, showing a seat panel structure according to a fourth embodiment.

The following describes an embodiment of the present invention with reference to the drawings. Figure 1 shows an overall front view of a shutter device having a seat plate structure according to one embodiment of the present invention, which is an entrance shutter device installed at the entrance of a building such as a warehouse. This entrance shutter device is equipped with a shutter curtain 2 that is attached to a building structure such as a wall and guided by guide rails 1 arranged on both the left and right sides and can be opened and closed up and down, the shutter curtain 2 comprising a curtain body 3 and a seat plate 4 attached to the lower end of the curtain body 3, and the curtain body 3 that forms the shutter curtain 2 in its entirety is made up of a number of slats 5 arranged vertically in a row. The upper end of the curtain body 3 is connected to a horizontal winding shaft 7 that is rotatably supported by a pair of left and right brackets 6 attached to a hanging wall or the like in the attic space above the ceiling 15. The driving force from an opening/closing device 8, which is a combination of an electric motor and a brake, is transmitted to this winding shaft 7 via a transmission means 9 composed of a sprocket wheel, chain, etc., and the forward and reverse rotation driving force from the electric motor of the opening/closing device 8 rotates the winding shaft 7 forward and reverse, winding and unwinding the shutter curtain 2 on the winding shaft 7, which is guided by the guide rails 1 on both the left and right sides and moves up and down to open and close.

The shutter curtain 2, whose lower end on the closing side is the seat plate 4, moves downwards until the seat plate 4 reaches the floor 10 of the entranceway, causing the shutter curtain 2 to be fully closed. The shutter curtain 2 also moves upwards until the seat plate 4 reaches the height of the lintel member 11, which forms a slit in the ceiling 15 for inserting the shutter curtain 2 vertically, causing the shutter curtain 2 to be fully open.

As described above, the shutter device according to this embodiment is an electric shutter device in which the shutter curtain 2 is opened and closed vertically by the driving force from the opening and closing device 8, but the seat plate structure described below can also be applied to a manual shutter device in which a return spring is arranged inside the winding shaft, and when the winding shaft rotates in the reverse direction to close the shutter curtain downward, a return spring force is stored in this return spring to assist the forward rotation of the winding shaft to open and move the shutter curtain upward, and this return spring force allows the shutter curtain to be lightly opened and moved upward by manual operation.

As shown in FIG. 1, the left and right sides of the curtain body 3 of the shutter curtain 2 are inserted into the guide rails 1, and inside these guide rails 1, anti-slip members 12 are attached to both left and right ends of each of the slats 5 of the curtain body 3, which are spaced apart from one another. As shown in FIG. 2, which is a cross-sectional view of the line S2-S2 in FIG. 1, these anti-slip members 12 according to this embodiment are T-shaped with protrusions 12A protruding on both sides in the thickness direction of the shutter curtain 2, and each guide rail 1 is provided with lip portions 1B and 1C at the opening 1A into which the left and right sides of the curtain body 3 are inserted, for reducing the opening width dimension in the thickness direction of the shutter curtain 2 for this opening 1A.

Therefore, even if the wind pressure from, for example, a strong typhoon acts on the shutter curtain 2 in the thickness direction of the shutter curtain 2 when the shutter curtain 2 is fully closed or during opening and closing movement, causing the curtain body 3 to bend and deform in the thickness direction of the shutter curtain 2, the protrusions 12A of the slip-out prevention member 12 engage with the lip portions 1B, 1C of the guide rail 1, preventing the left and right sides of the curtain body 3 from slipping out from inside the guide rail 1.

Figure 3 is a cross-sectional view of the S3-S3 line in Figure 1 when the shutter curtain 2 is fully closed and the seat plate 4 reaches the floor 10 of the entrance in Figure 1. As shown in Figure 3, the seat plate 4 according to this embodiment has a rising part 14 that rises vertically from the seat plate body 13, which has a box-shaped cross section, and the lowest slat 5A of the many slats 5 is connected to this rising part 14 with fasteners such as screws and rivets. As shown in Figure 1, the left and right end portions of the seat plate body 13 and the rising part 14 are not inserted into the guide rails 1 on both the left and right sides, and the left and right end portions of the lowest slat 5A are inserted into the guide rails 1. The left and right end portions of the rising part 14 may be inserted into the guide rails 1 on both the left and right sides, and insert members inserted into the guide rails 1 on both the left and right sides may be connected to the left and right end portions of the seat plate body 13.

As shown in Figure 3, when the shutter curtain 2 is fully closed with the seat board 4 reaching the floor 10 of the entranceway, the shutter curtain 2 divides the entranceway into the inside and outside of the room in the thickness direction of the shutter curtain 2, and in this embodiment, two storage members 21, 22 are attached to the upper and lower sides of one of the two sides of the shutter curtain 2 on the seat board 4 in the thickness direction, the inside of the room side, and of these storage members 21, 22, the upper storage member 21 is fixed to the rising portion 14 and the lower storage member 22 is fixed to the seat board main body 13. These storage members 21, 22 are formed from channel material that opens toward the inside of the room in the thickness direction of the shutter curtain 2, so the upper storage member 21 consists of a web portion 21A that is connected to the rising portion 14 by welding or screws, etc., and two upper and lower flange portions 21B, 21C that extend parallel to the inside of the room from both the upper and lower ends of this web portion 21A, and the lower storage member 22 consists of a web portion 22A that is connected to the indoor surface 13A of the seat panel main body 13 by welding or screws, etc., and two upper and lower flange portions 22B, 22C that extend parallel to the inside of the room from both the upper and lower ends of this web portion 22A.

Figure 4 shows the seat panel 4, two upper and lower storage members 21, 22, and a number of rod-shaped members that are stored inside these storage members 21, 22 in an unfoldable and foldable manner, and are arranged on the seat panel 4 in an unfoldable and foldable manner. These rod-shaped members are also shown in Figure 3, and also in Figure 5, which shows the state when these rod-shaped members are unfolded. The rod-shaped members stored inside the upper storage member 21 are the first rod-shaped member 23 shown in Figures 3 to 5, the second rod-shaped member 24 shown in Figures 3 and 5, and the third rod-shaped member 25 shown in Figures 4 and 5. The rod-shaped members stored inside the lower storage member 22 are the fourth rod-shaped member 26 shown in Figures 3 to 5, the fifth rod-shaped member 27 shown in Figures 3 to 5, and the sixth rod-shaped member 28 shown in Figure 5.

As can be seen from Figure 3, these rod-shaped members 23-28 are formed from channel material, just like the upper and lower two storage members 21, 22, and when folded against the seat plate 4 and stored inside the upper and lower two storage members 21, 22, the openings of the rod-shaped members 23-28 open toward the outside of the room. Also, at this time, as shown in Figure 4, the entire second rod-shaped member 24 and part of the third rod-shaped member 25 are stored inside the first rod-shaped member 23, and part of the fifth rod-shaped member 27 and the entire sixth rod-shaped member 28 are stored inside the fourth rod-shaped member 26.

When stored inside the upper and lower two storage members 21, 22, the length direction of each of the first to sixth rod-shaped members 23-28 is the length direction of the seat plate 4, which is the width direction of the shutter curtain 2 as shown in Figure 1.

As can be seen from FIG. 5, the second rod-shaped member 24 and the third rod-shaped member 25, and the fifth rod-shaped member 27 and the sixth rod-shaped member 28 are arranged apart in the length direction of the storage members 21 and 22, which is the length direction of the seat plate 4. The base end of the second rod-shaped member 24 is swingably connected to the upper storage member 21 by a pin 29 that is an axial member whose axial direction is the vertical direction, and the tip end of the second rod-shaped member 24 is swingably connected to the first rod-shaped member 23 by a pin 30 that is an axial member whose axial direction is the vertical direction. This pin 30 is also shown in FIG. 3. The base end of the third rod-shaped member 25 is swingably connected to the upper storage member 21 by a pin 31 that is an axial member whose axial direction is the vertical direction, as shown in FIG. 5, and the tip end of the third rod-shaped member 25 is swingably connected to the first rod-shaped member 23 by a pin 32 that is an axial member whose axial direction is the vertical direction.

Furthermore, as shown in FIG. 7 described later, the base end of the fifth rod-shaped member 27 is swingably connected to the lower storage member 22 by pin 33, which is an axial member with the vertical direction as the axial direction, and the tip end of the fifth rod-shaped member 27 is swingably connected to the fourth rod-shaped member 26 by pin 34 (FIGS. 5 and 7), which is an axial member with the vertical direction as the axial direction. Of these pins 33 and 34, pin 33 is also shown in FIG. 3. Furthermore, as shown in FIG. 7, the base end of the sixth rod-shaped member 28 is swingably connected to the lower storage member 22 by pin 35, which is an axial member with the vertical direction as the axial direction, and the tip end of the sixth rod-shaped member 28 is swingably connected to the fourth rod-shaped member 26 by pin 36 (FIGS. 5 and 7), which is an axial member with the vertical direction as the axial direction.

Therefore, of the two upper and lower storage members 21, 22, the first to third rod-shaped members 23-25 arranged in the upper storage member 21 are arranged on the seat board 4 so that they can be unfolded and folded relative to the seat board 4, and these first to third rod-shaped members 23-25 are stored inside the upper storage member 21 when folded. In addition, the fourth to sixth rod-shaped members 26-28 arranged in the lower storage member 22 are also arranged on the seat board 4 so that they can be unfolded and folded relative to the seat board 4, and these fourth to sixth rod-shaped members 26-28 are stored inside the lower storage member 22 when folded.

In the above, the length dimensions of the first and fourth rod-shaped members 23, 26 are the same, and the length dimensions of the second, third, fifth and sixth rod-shaped members 24, 25, 27, 28 are also the same. Furthermore, when the first to sixth rod-shaped members 23-28 are stored inside the two upper and lower storage members 21, 22, the first and fourth rod-shaped members 23, 26 are arranged at the same position in both the left-right direction and the thickness direction of the shutter curtain 2, the second and fifth rod-shaped members 24, 27 are also arranged at the same position in both the left-right direction and the thickness direction of the shutter curtain 2, and the third and sixth rod-shaped members 25, 28 are also arranged at the same position in both the left-right direction and the thickness direction of the shutter curtain 2. However, when the first to sixth rod-shaped members 23 to 28 are stored inside the two upper and lower storage members 21, 22, the positions of the base end and tip end of the second rod-shaped member 24 and the fifth rod-shaped member 27 are reversed in the length direction of the storage members 21, 22, which is the left-right direction, and the positions of the base end and tip end of the third rod-shaped member 25 and the sixth rod-shaped member 28 are also reversed in the length direction of the storage members 21, 22.

As described above, in order to allow the first and fourth rod-shaped members 23, 26, the second and fifth rod-shaped members 24, 27, and the third and sixth rod-shaped members 25, 28 to be positioned at the same positions in the thickness direction of the shutter curtain 2, the tips of the two upper and lower flange portions 21B, 21C of the upper storage member 21 extend toward the room side in the thickness direction of the shutter curtain 2 to the same positions as the tips of the two upper and lower flange portions 22B, 22C of the lower storage member 22, as shown in FIG. 3.

When the first to sixth rod-shaped members 23 to 28 are folded against the seat plate 4 and stored inside the two upper and lower storage members 21, 22, as can be seen from FIG. 4, the entire second rod-shaped member 24 is stored inside the first rod-shaped member 23, so as shown in FIG. 5 and FIG. 6 described later, the first rod-shaped member 23 is provided with a recess 23A to avoid interference with the pin 29 mentioned above, and as can be seen from FIG. 4, the entire sixth rod-shaped member 28 is stored inside the fourth rod-shaped member 26, so as shown in FIG. 5 and FIG. 7, the fourth rod-shaped member 26 is also provided with a recess 26A to avoid interference with the pin 35 mentioned above.

Furthermore, as shown in FIG. 6, holes 37, 38 are formed in the first rod-shaped member 23 near both end faces in the longitudinal direction of the first rod-shaped member 23, and as shown in FIG. 7, holes 39, 40 are formed in the fourth rod-shaped member 26 near both end faces in the longitudinal direction of the fourth rod-shaped member 26.

Under normal circumstances, the first to third rod-shaped members 23 to 25 are folded relative to the seat board 4 and stored inside the upper storage member 21, and the fourth to sixth rod-shaped members 26 to 28 are also folded relative to the seat board 4 and stored inside the lower storage member 22, and in this state the shutter curtain 2 is opened and closed in the vertical direction. If a situation arises in which strong wind pressure from a typhoon is expected to act on the shutter curtain 2 in the thickness direction of the shutter curtain 2, the worker will spread out the first to third rod-shaped members 23-25 stored inside the upper storage member 21 relative to the seat board 4 while keeping the first rod-shaped member 23 parallel to the seat board 4, as shown by the first rod-shaped member 23' in FIG. 6 with the two-dot chain line, and will spread out the fourth to sixth rod-shaped members 26-28 stored inside the lower storage member 22 relative to the seat board 4 while keeping the fourth rod-shaped member 26 parallel to the seat board 4, as shown by the fourth rod-shaped member 26' in FIG. 7 with the two-dot chain line.

In this way, the first to third rod-shaped members 23 to 25 are deployed relative to the seat plate 4 in a range in which the second and third rod-shaped members 24, 25 form an acute angle with respect to the length direction of the seat plate 4, which is also the length direction of the upper storage member 21, as shown by the second and third rod-shaped members 24', 25' in FIG. 6, and the fourth to sixth rod-shaped members 26 to 28 are deployed relative to the seat plate 4 in a range in which the fifth and sixth rod-shaped members 27, 28 form an acute angle with respect to the length direction of the seat plate 4, which is also the length direction of the lower storage member 22, as shown by the fifth and sixth rod-shaped members 27', 28' in FIG. 7, but as described above, the first to sixth rods are deployed inside the two upper and lower storage members 21, 22. When the rod-shaped members 23-28 are stored, the base end and tip end positions of the second rod-shaped member 24 and the fifth rod-shaped member 27 are reversed in the length direction of the storage members 21 and 22, and the base end and tip end positions of the third rod-shaped member 25 and the sixth rod-shaped member 28 are also reversed in the length direction of the storage members 21 and 22. Therefore, the acute angles that the second and third rod-shaped members 24', 25' make with respect to the length direction of the seat plate 4 and the acute angles that the fifth and sixth rod-shaped members 27', 28' make with respect to the length direction of the seat plate 4 are opposite angles but of the same magnitude, so that the first to third rod-shaped members 23-25 and the fourth to sixth rod-shaped members 26-28 can be deployed relative to the seat plate 4.

As a result, as shown in Figures 5 and 6, the upper storage member 21 attached to the seat plate 4 and the first to third rod members 23 to 25 form an upper parallelogram link mechanism 41, and as shown in Figures 5 and 7, the lower storage member 22 attached to the seat plate 4 and the fourth to sixth rod members 26 to 28 form a lower parallelogram link mechanism 42. At this time, the first and fourth rod members 23', 26' are parallel to the seat plate 4, and these first and fourth rod members 23', 26' reach the same position on the indoor side in the thickness direction of the shutter curtain 2.

After this, the worker performs the work of connecting the first rod-shaped member 23 and the fourth rod-shaped member 26 with the two connecting devices 43, 44 shown in Figures 5 and 8. These connecting devices 43, 44 are bolts 43A, 44A and nuts 43C, 44C shown in Figure 5. The shaft portion 43B of the bolt 43A shown in Figure 5 is inserted into the holes 37, 39 of the first and fourth rod-shaped members 23, 26 shown in Figures 6 and 7, and the shaft portion 44B of the bolt 44A shown in Figure 5 is inserted into the holes 38, 40 of the first and fourth rod-shaped members 23, 26 shown in Figures 6 and 7, respectively, and then the nuts 43C, 44C shown in Figure 5 are screwed onto the ends of the shaft portions 43B, 44B and tightened.

As a result, the first and fourth rod-shaped members 23, 26, which are components constituting part of the parallelogram link mechanisms 41, 42, are joined together by the two fasteners 43, 44, and the second and third rod-shaped members 24, 25 and the fifth and sixth rod-shaped members 27, 28 are unable to swing relative to the seat plate 4 around their respective base ends connected to the storage members 21, 22 by the pins 29, 31, 33, 35. As a result, the two upper and lower parallelogram link mechanisms 41, 42 maintain the parallelogram shape shown in Figures 6 and 7. This state is also shown in Figure 8.

The above-described operations are performed when the shutter curtain 2 is fully closed, or when the shutter curtain 2 has been moved slightly from the fully closed position toward the open side and stopped. If the above-described operations are performed when the shutter curtain 2 has been moved slightly from the fully closed position toward the open side and stopped, then the shutter curtain 2 is lowered to the fully closed position.

When the above-mentioned work is carried out, the second and third rod-shaped members 24, 25 of the upper parallelogram link mechanism 41 and the fifth and sixth rod-shaped members 27, 28 of the lower parallelogram link mechanism are unable to swing relative to the seat plate 4 around their respective base ends which are connected to the storage members 21, 22 by pins 29, 31, 33, 35. Therefore, even if large wind pressure due to strong typhoon winds acts on the shutter curtain 2 in the thickness direction of the shutter curtain 2, the first and fourth rod-shaped members 23, 26 which are parallel to the seat plate 4 become reinforcing members 45, 46 as shown in Figure 5 which resist the bending deformation of the seat plate 4 in the thickness direction of the shutter curtain 2. That is, the first and fourth rod-shaped members 23, 26, which are components constituting part of the parallelogram link mechanisms 41, 42, serve as reinforcing members 45, 46 for increasing the strength of the seat plate 4 in the thickness direction of the shutter curtain 2, and therefore prevent the seat plate 4 from being significantly bent and deformed in the thickness direction of the shutter curtain 2, thereby preventing a gap from being created between the seat plate 4 and the floor 10 of the entrance in FIG. 1.

In addition, in this embodiment, since there are two reinforcing members 45, 46 at the top and bottom to increase the strength of the shutter curtain 2 in the thickness direction for the seat board 4, the strength of the shutter curtain 2 in the thickness direction for the seat board 4 can be sufficiently increased. Furthermore, these reinforcing members 45, 46 are connected to the storage members 21, 22 attached to the seat board 4 by two rod-shaped members 24, 25 and rod-shaped members 27, 28 in the two parallelogram link mechanisms 41, 42 at the top and bottom, and these two rod-shaped members 24, 25 and rod-shaped members 27, 28 form acute angles in opposite directions with respect to the length direction of the seat board 4, so that the length range in the length direction of the seat board 4 where the reinforcing members 45, 46 are connected to the seat board 4 by the rod-shaped members 24, 25, 27, 28 is large, and therefore, in this respect, the strength of the shutter curtain 2 in the thickness direction for the seat board 4 can be sufficiently increased.

When it is no longer necessary to increase the strength of the shutter curtain 2 in the thickness direction for the seat board 4 due to the passage of a typhoon or other reasons, the worker removes the two fasteners 43, 44 and folds the first to third rod-shaped members 23-25 relative to the seat board 4 to store them inside the upper storage member 21, and folds the fourth to sixth rod-shaped members 26-28 relative to the seat board 4 to store them inside the lower storage member 22. This reduces the dimension of the shutter curtain 2 in the thickness direction for the entire seat board 4, including all of the rod-shaped members 23-28, and in this state the shutter curtain 2 can be opened and closed in the vertical direction.

In addition, in this embodiment, all of the rod-shaped members 23-28 are arranged on the seat plate 4 via the storage members 21, 22. However, since the rod-shaped members 23-28 are arranged on the seat plate 4 on the inside of the room, the rod-shaped members 23-28 and the storage members 21, 22 for storing the rod-shaped members 23-28 inside can be prevented from coming into contact with rainwater during rainy weather, and this can effectively prevent the rod-shaped members 23-28 and the storage members 21, 22 from rusting.

Furthermore, when folded onto the seat panel 4, all of the rod-shaped members 23 to 28 are stored inside the storage members 21 and 22, so these rod-shaped members 23 to 28 can be effectively protected from external forces, etc. by the storage members 21 and 22.

In addition, the direction in which the rod-shaped members 23-28 unfold and fold relative to the seat plate 4 is the thickness direction of the shutter curtain 2, and the storage members 21, 22 are formed from channel material that opens toward the room side in the thickness direction of the shutter curtain 2, so that the rod-shaped members 23-28 can be unfolded and folded effectively relative to the storage members 21, 22.

Figures 9 to 15 show another embodiment of the above-mentioned embodiment in which two parallelogram link mechanisms 41, 42 are formed by unfolding the rod members 23 to 28. Figure 10 is a cross-sectional view taken along line S10-S10 in Figure 9, and Figures 11 to 15 are views corresponding to Figures 4 to 8. In this embodiment, the first rod member 23 of the first to third rod members 23 to 25 when stored inside the upper storage member 21 by folding it against the seat plate 4, and the fourth rod member 26 of the fourth to sixth rod members 26 to 28 when stored inside the lower storage member 22, are connected to the two upper and lower storage members 21, 22 as shown in Figures 9 and 11 by two fasteners 43, 44 shown in Figures 5 and 8.

That is, in this embodiment, as shown in FIG. 12, holes 50 and 51 are formed in the upper storage member 21 and the lower storage member 22 at positions that correspond to both the left-right direction and the thickness direction of the shutter curtain 2, and holes 52 and 53 are formed in the first rod-shaped member 23 and the fourth rod-shaped member 26 at positions that correspond to the holes 50 and 51 when these rod-shaped members 23 and 26 are stored inside the storage members 21 and 22. In addition, holes 54 and 55 are formed in the upper storage member 21 and the lower storage member 22 at positions that are shifted in the left-right direction from the holes 50 and 51 and correspond to both the left-right direction and the thickness direction of the shutter curtain 2, and holes 56 and 57 are formed in the first rod-shaped member 23 and the fourth rod-shaped member 26 at positions that correspond to the holes 54 and 55 when these rod-shaped members 23 and 26 are stored inside the storage members 21 and 22.

When the first rod-shaped member 23 and the fourth rod-shaped member 26 are stored inside the storage members 21, 22, of the fasteners 43, 44, the shaft portion 43B of the bolt 43A of the fastener 43 is inserted into the holes 50, 52, 53 and also into hole 51, and the nut 43C is screwed onto the end of the shaft portion 43B that penetrates vertically through the two upper and lower storage members 21, 22 (see Figure 10), and the shaft portion 44B of the bolt 44A of the fastener 44 is inserted into the holes 54, 56, 57 and also into hole 55, and the nut 44C is screwed onto the end of the shaft portion 44B that penetrates vertically through the two upper and lower storage members 21, 22. As a result, the first and fourth rod-shaped members 23, 26, which are components constituting a part of each of the two upper and lower parallelogram link mechanisms 41, 42 and also serve as the reinforcing members 45, 46 mentioned above, are connected to the two upper and lower storage members 21, 22 by two fasteners 43, 44, and therefore these first and fourth rod-shaped members 23, 26 are also connected to the seat plate 4 via the storage members 21, 22.

In this embodiment, when the shutter curtain 2 is opened and closed in the vertical direction by folding the first to third rod-shaped members 23 to 25 against the seat plate 4 and storing them inside the upper storage member 21, and folding the fourth to sixth rod-shaped members 26 to 28 against the seat plate 4 and storing them inside the upper storage member 21, the two fasteners 43, 44 can effectively prevent the first to third rod-shaped members 23 to 25 from unfolding out from inside the upper storage member 21 and the fourth to sixth rod-shaped members 26 to 28 from unfolding out from inside the lower storage member 22 due to vibrations caused by this opening and closing movement.

In addition, as shown in FIG. 15, when the first to third rod-shaped members 23 to 25 stored inside the upper storage member 21 are deployed relative to the seat plate 4 to form the upper parallelogram link mechanism 41, and the fourth to sixth rod-shaped members 26 to 28 stored inside the lower storage member 22 are deployed relative to the seat plate 4 to form the lower parallelogram link mechanism 42, the two fasteners 43, 44 in this embodiment are also used as fasteners to integrally connect the first and fourth rod-shaped members 23, 26, which become the two reinforcing members 45, 46, so that the fasteners 43, 44 can be used for multiple purposes.

Furthermore, when the first to third rod-shaped members 23 to 25 stored inside the upper storage member 21 are deployed relative to the seat plate 4 to form the upper parallelogram link mechanism 41, and the fourth to sixth rod-shaped members 26 to 28 stored inside the lower storage member 22 are deployed relative to the seat plate 4 to form the lower parallelogram link mechanism 42, the first and fourth rod-shaped members 23, 26 are integrated together using two fasteners 43, 44. As can be seen from FIG. 15, the holes formed in the first and fourth rod-shaped members 23, 26 for inserting 44B are provided near both end faces of the rod-shaped members 23, 26 in the longitudinal direction, similar to the holes 37-40 shown in FIG. 6 and FIG. 7 described above, so that the first and fourth rod-shaped members 23, 26 when they are reinforcing members 45, 46 are connected by two fasteners 43, 44 with a gap slightly smaller than the length dimension of the rod-shaped members 23, 26. On the other hand, when the first and fourth rod-shaped members 23, 26 are stored inside the two upper and lower storage members 21, 22, the rod-shaped members 23, 26 are connected to the storage members 21, 22 by the two fasteners 43, 44 and are connected to the seat plate 4 via the storage members 21, 22, so that even at this time, the strength of the shutter curtain 2 in the thickness direction for the seat plate 4 is also increased by the first and fourth rod-shaped members 23, 26.

However, as can be seen from a comparison between FIG. 11 and FIG. 12, the distance between the two fasteners 43, 44 that connect the first and fourth rod-shaped members 23, 26 together when they are reinforcing members 45, 46 is greater than the distance between the two fasteners 43, 44 that connect the first and fourth rod-shaped members 23, 26 to the storage members 21, 22 when they are stored inside the two upper and lower storage members 21, 22. Therefore, when the first and fourth rod-shaped members 23, 26 are connected together with the two fasteners 43, 44 and these rod-shaped members 23, 26 become reinforcing members 45, 46, the strength of the shutter curtain 2 in the thickness direction of the seat plate 4 can be made greater than when the first and fourth rod-shaped members 23, 26 are stored inside the storage members 21, 22 and connected to these storage members 21, 22 with the two fasteners 43, 44.

That is, in this embodiment, when the first and fourth rod-shaped members 23, 26 are reinforcing members 45, 46, they are connected by two fasteners 43, 44 at positions close to both end faces of the rod-shaped members 23, 26 in the longitudinal direction. Therefore, the strength of the shutter curtain 2 in the thickness direction for the seat plate 4 can be increased by utilizing the substantially entire length dimension of the first and fourth rod-shaped members 23, 26.

16 to 22 show an embodiment in which, unlike the previous embodiments, when multiple rod-shaped members are deployed relative to the seat plate 4, these rod-shaped members are deployed into a shape different from that of the parallelogram link mechanism. In this embodiment, first to third rod-shaped members 62 to 64 shown in FIG. 17, which is a cross-sectional view of line S17-S17 in FIG. 16, and in FIGS. 20 to 22 are used, and when these rod-shaped members 62 to 64 are folded relative to the seat plate 4, as shown in FIG. 17, they are stored inside a storage member 61 attached to the seat plate 4. This storage member 61, like the upper storage member 21 shown in the embodiment in FIG. 3, is formed of a channel material consisting of a web portion 61A joined to the rising portion 14 of the seat plate 4 by welding or screws, etc., and two upper and lower flange portions 61B, 61C extending in parallel from the upper and lower ends of this web portion 61A toward the interior side of the room. Similarly to the rod members 23 to 28 in the embodiment described above, the first to third rod members 62 to 64 are stored inside the storage member 61 with their respective length directions being the same as the length direction of the seat panel 4, and these rod members 62 to 64 are also made of channel material, and when stored inside the storage member 61, the rod members 62 to 64 open toward the outside of the room in the thickness direction of the shutter curtain 2.

As can be seen from FIG. 18, when the first to third rod-shaped members 62 to 64 are stored inside the storage member 61, a portion of the second rod-shaped member 63 in the longitudinal direction is stored inside the first rod-shaped member 62, and as shown in FIG. 21, the entire third rod-shaped member 64 in the longitudinal direction is stored inside this second rod-shaped member 63.

The first rod-shaped member 62 and the second rod-shaped member 63 are arranged in the storage member 61 at a distance from each other in the length direction of the storage member 61, which is also the length direction of the seat plate 4. As shown in FIG. 21, the base end of the first rod-shaped member 62 is connected to the storage member 61 by a pin 65, which is an axial member whose axial direction is the up-down direction, so as to be freely swingable. The base end of the first rod-shaped member 62 and the second rod-shaped member 63 is connected to the storage member 61 by a pin 66, which is an axial member whose axial direction is the up-down direction, so as to be freely swingable. When the first rod-shaped member 62 and the second rod-shaped member 63 are stored inside the storage member 61, the positions of the base ends are opposite to each other in the left-right direction, which is the length direction of the storage member. Of the pins 65 and 66, the pin 65 is also shown in FIG. 17. Also, as shown in FIG. 21, holes 67 and 68 are formed in the tips of the first and second rod-shaped members 62 and 63.

21, the base end, which is one end in the length direction of the third rod-shaped member 64, is connected to the second rod-shaped member 63 by a pin 69, which is an axial member with the vertical direction as its axial direction, in the middle between the base end and the tip end of the rod-shaped member 63, so that the base end can swing freely, and a hole 70 is formed in the tip end, which is the other end in the length direction of the third rod-shaped member 64. The pin 69 is also shown in FIG. 17. And, as shown in FIG. 21, the first rod-shaped member 62 is formed with a hole 71 at a position from the hole 67 of the tip end of the first rod-shaped member 62 that is the same or approximately the same as the distance from the hole 67 of the tip end of the first rod-shaped member 62 that corresponds to the distance between the hole 68 of the tip end of the second rod-shaped member 63 and the pin 69, that is, the distance between the hole 68 and the pin 69.

In the above, the length dimensions of the first rod-shaped member 62 and the second rod-shaped member 63 are the same or approximately the same, and as can be seen from the above explanation, the length dimension of the third rod-shaped member 64 is shorter than the length dimensions of the first and second rod-shaped members 62, 63.

As shown in Figures 17 and 18, the first to third rod-shaped members 62 to 64 are normally stored entirely inside the storage member 61, and in this state the shutter curtain 2 moves up and down to open and close. When it is expected that wind pressure from a typhoon's strong winds will act on the shutter curtain 2 in the thickness direction of the shutter curtain 2, the worker will pull out the first rod-shaped member 62 from inside the storage member 61 and deploy it against the seat board 4 by swinging the base end around the pin 65 as shown by the first rod-shaped member 62' in Figure 21 by the two-dot chain line, and pull out the second rod-shaped member 63 from inside the storage member 61 and deploy it against the seat board 4 by swinging the base end around the pin 66 as shown by the second rod-shaped member 63' in Figure 21 by the two-dot chain line. After this, as shown in Figure 19, the tips of the first rod-shaped member 62 and the second rod-shaped member 63, which now form acute angles in opposite directions relative to the length direction of the seat plate 4, are overlapped and these tips are fastened together with a fastener 75. This fastener 75 is a bolt 75A and a nut 75C, similar to the fasteners 43 and 44 in the above-mentioned embodiment, and the shaft of the bolt 43A is inserted into the holes 67 and 68 provided at the tips of the first rod-shaped member 62 and the second rod-shaped member 63, and the nut 75C is screwed onto the end of the shaft to tighten it.

Next, the worker pulls out the third rod-shaped member 64, which was stored inside the second rod-shaped member 63, from inside the second rod-shaped member 63 by swinging the base end around the pin 69, as shown in the third rod-shaped member 64' shown by the two-dot chain line in FIG. 21, to form the third rod-shaped member 64'' shown by the two-dot chain line in FIG. 21. After this, as shown in FIG. 20 and FIG. 22, the tip end of the third rod-shaped member 64 is connected to the first rod-shaped member 62 by the connecting device 76. As can be seen from FIG. 20, the connecting device 76 is also made of bolts 76A and 76C, and the shaft of the bolt 76A is inserted into the hole 71 provided in the first rod-shaped member 62 and the hole 70 provided in the third rod-shaped member 64, and the nut 76C is screwed onto the end of the shaft to tighten it.

As a result, the third rod-shaped member 64 is bridged between the first rod-shaped member 62 and the second rod-shaped member 63, parallel or approximately parallel to the seat plate 4 and the storage member 61, and the tips of the first rod-shaped member 62 and the second rod-shaped member 63 are connected to each other by the connecting device 75, so that the base ends of these rod-shaped members 62, 63 cannot swing around the pins 65, 66.

Therefore, even if a large wind pressure caused by strong typhoon winds acts on the shutter curtain 2 in the thickness direction of the shutter curtain 2, the third rod-shaped member 64, which is parallel or approximately parallel to the seat plate 4, becomes the reinforcing member 77 in Figures 20 and 22 that resists the seat plate 4 from bending and deforming in the thickness direction of the shutter curtain 2, and the reinforcing member 77 can prevent the seat plate 4 from bending and deforming significantly in the thickness direction of the shutter curtain 2.

In this embodiment, when there is no longer a need to increase the strength of the shutter curtain 2 in the thickness direction for the seat board 4 due to the passage of a typhoon or other reasons, the worker can remove the two fasteners 75, 76 and fold the first to third rod-shaped members 62-64 relative to the seat board 4 and store them inside the storage member 61, thereby reducing the dimension of the shutter curtain 2 in the thickness direction for the entire seat board 4, including all of the rod-shaped members 62-64, and allowing the shutter curtain 2 to be opened and closed in the vertical direction.

In addition, in this embodiment, all of the rod-shaped members 62-64 are arranged on the seat panel 4 on the inside of the room, so the rod-shaped members 62-64 and the storage member 61 for storing these rod-shaped members 62-64 inside can be prevented from coming into contact with rainwater, etc., during rainy weather. This effectively prevents the rod-shaped members 62-64 and the storage member 61 from rusting, etc.

Furthermore, when folded relative to the seat panel 4, all of the rod-shaped members 62 to 64 are stored inside the storage member 61, so that the storage member 61 can effectively protect these rod-shaped members 62 to 64 from external forces, etc.

In addition, the direction in which the rod-shaped members 62-64 unfold and fold relative to the seat plate 4 is the thickness direction of the shutter curtain 2, and the storage member 61 is formed from a channel material that opens toward the room side in the thickness direction of the shutter curtain 2, so that the rod-shaped members 62-64 can be unfolded and folded effectively relative to the storage member 61.

Figures 23 to 29 show another embodiment of the embodiment of Figures 16 to 22 described above. In this embodiment, the first to third rod-shaped members 62 to 64 in the embodiment of Figures 16 to 22 are used. In this embodiment, as shown in Figures 23 and 25, when the first to third rod-shaped members 62 to 64 are stored in the storage member 61, the first and second rod-shaped members 62, 63 are connected to the storage member 61 by the two fasteners 75, 76 shown in Figures 20 and 22.

For this reason, in this embodiment, as shown in Figures 26 and 27, holes 80 and 81 are formed in the storage member 61 at positions spaced apart in the longitudinal direction of the seat plate 4, and holes 82 and 83 are formed in the second rod-shaped member 63 at positions that coincide with holes 80 and 81 when the rod-shaped member 63 is stored inside the storage member 61, as shown in Figures 26 to 29.

In this embodiment, the holes 67 and 71 formed in the first rod-shaped member 62, as shown in FIG. 21 and FIG. 28, are aligned with the holes 80 and 81 formed in the storage member 61 when the rod-shaped member 62 is folded against the seat plate 4 and stored inside the storage member 61.

Therefore, when the first rod-shaped member 62 and the second rod-shaped member 63 are stored inside the storage member 61, as shown in Fig. 25, the shaft portion of the bolt 76A of the fastener 76 is inserted into the holes 80, 71, and 82, and the nut 76C is screwed onto the end of the shaft and tightened (see Fig. 24), and the shaft portion of the bolt 75A of the fastener 75 is inserted into the holes 81, 67, and 83, and the nut 75C is screwed onto the end of the shaft and tightened. As a result, the first and second rod-shaped members 62, 63 are connected to the storage member 61 by the two fasteners 75, 76 spaced apart in the longitudinal direction of the seat plate 4. In addition, the third rod-shaped member 64, whose base end is connected to the second rod-shaped member 63 by a pin 69 so as to be freely swingable, is sandwiched between the web portion 61A of the storage member 61 and the second rod-shaped member 63 and stored inside the storage member 61, as shown in FIG. 24, so the third rod-shaped member 64 does not swing around the pin 69.

Therefore, in this embodiment, when the shutter curtain 2 opens and closes in the vertical direction, with the first to third rod-shaped members 62 to 64 folded against the seat plate 4 and stored inside the storage member 61, the two fasteners 75, 76 can effectively prevent the first to third rod-shaped members 62 to 64 from unfolding and moving out from inside the storage member 61 due to vibrations caused by this opening and closing movement.

Of the two fasteners 75, 76 in this embodiment, the fastener 75 is for fastening the tips of the first and second rod-shaped members 62, 63 when they are deployed, as shown in Figures 20 and 27, and the fastener 76 is for fastening the first rod-shaped member 62 and the third rod-shaped member 64, so that these fasteners 75, 76 can be used for multiple purposes.

Furthermore, in this embodiment, when the first and second rod-shaped members 62, 63 are stored inside the storage member 61, these rod-shaped members 62, 63 are connected to the storage member 61 by two fasteners 75, 76. Therefore, the strength of the shutter curtain 2 in the thickness direction for the seat plate 4 at this time is also increased by the first and second rod-shaped members 62, 64. However, when the first and second rod-shaped members 62, 63 are deployed and the third rod-shaped member 64 becomes the reinforcing member 77 described above, the length dimension of this third rod-shaped member 64 is, in other words, the length dimension from the pin 69 to the fastener 76 shown in Figures 20 and 27, as can be seen from a comparison between Figures 25 and 27. As can be seen, this is larger than the distance between the two fasteners 75, 76 that connect the first and second rod-shaped members 62, 63 to the storage member 61 when they are stored inside the storage member 61, and the first and second rod-shaped members 62, 63 form a triangular structure in a plan view together with the storage member 61. Therefore, compared to when the first and second rod-shaped members 62, 63 are stored inside the storage member 61 and connected to the storage member 61 by the fasteners 75, 76, the third rod-shaped member 64 and the first and second rod-shaped members 62, 63 when they become the reinforcing member 77 can increase the strength of the shutter curtain 2 in the thickness direction for the seat plate 4.

In addition, in this embodiment, when the first and second rod-shaped members 62, 63 are stored inside the storage member 61, the holes 67 and 71 formed in the first rod-shaped member 62 for inserting the shanks of the bolts 75A, 76A of the fasteners 75, 76 are also used for inserting the shanks of the bolts 75A, 76A of the fasteners 75, 76 when the first rod-shaped member 62 is deployed to make the third rod-shaped member 64 a reinforcing member 77. This allows the holes 67, 71 to be used for both purposes, thereby reducing the number of holes formed in the first rod-shaped member 62 and maintaining the strength of the rod-shaped member 62.

In the embodiments described so far, the rod-shaped members 23-28, 62-64 and the storage members 21, 22, 61 are arranged on the indoor side of the seat panel 4, but these rod-shaped members 23-28, 62-64 and the storage members 21, 22, 61 may be arranged on the outdoor side of the seat panel, or on both the outdoor side and indoor side of the seat panel.

The present invention can be used, for example, in the seat plate of a shutter device installed at the entrance or exit of a building.

REFERENCE SIGNS LIST 1 guide rail 2 shutter curtain 4 seat plate 21, 22 storage member 23 to 28 rod-shaped member 41, 42 parallelogram link mechanism 43, 44 fastener 45, 46 reinforcing member 61 storage member 62 to 64 rod-shaped member 75, 76 fastener 77 reinforcing member

Claims (12)

A seat plate structure of a shutter device including guide rails arranged on both the left and right sides and a shutter curtain that moves to open and close while being guided by these guide rails and has a seat plate at the end on the closing side,
A seat plate structure for a shutter device, characterized in that a plurality of rod-shaped members are arranged on the seat plate so as to be unfoldable and foldable in the thickness direction of the shutter curtain, and at least one of these rod-shaped members has a length direction that is the length direction of the seat plate and serves as a reinforcing member that is parallel to the seat plate both when unfolded and when folded. The seat plate structure of the shutter device described in claim 1, characterized in that the reinforcing members are two in the vertical direction. The seat plate structure of the shutter device described in claim 2, characterized in that the two reinforcing members are connected when deployed. The seat plate structure of the shutter device according to claim 2, characterized in that the two reinforcing members are connected when folded. The seat plate structure of a shutter device according to claim 4, characterized in that the connection of the two reinforcing members when folded is performed by a fastener for connecting the two reinforcing members to the seat plate. The seat plate structure of the shutter device described in claim 2, characterized in that the two reinforcing members are connected both when the shutter device is unfolded and when the shutter device is folded. The seat plate structure of the shutter device described in claim 6, characterized in that the two reinforcing members are connected by two fasteners provided in the length direction of the two reinforcing members both when unfolded and when folded, and the distance between the two fasteners when the two reinforcing members are unfolded is greater than the distance between the two fasteners when the two reinforcing members are folded. In the seat plate structure of the shutter device described in claim 1, two of the multiple rod-shaped members are arranged apart in the length direction of the seat plate, and the base ends of each of these rod-shaped members are swingably connected to the seat plate by a pin, and one end of the reinforcing member in the length direction is swingably connected by a pin at a midpoint between the base end and the tip end of one of the two rod-shaped members, and the other end of the reinforcing member in the length direction when it is deployed and becomes parallel to the seat plate is connected by a connector at a midpoint between the base end and the tip end of the other of the two rod-shaped members. A seat plate structure of a shutter device, characterized in that The seat plate structure of the shutter device described in claim 8, characterized in that when the reinforcing member is deployed and parallel to the seat plate, the tips of the two rod-shaped members are connected to each other by a connecting device. The seat plate structure of a shutter device according to any one of claims 1 to 9, characterized in that the seat plate is provided with a storage member for storing the reinforcing member inside when folded. The seat plate structure of the shutter device described in claim 10, wherein the storage member is formed of a channel material that opens in the thickness direction of the shutter curtain. A seat plate structure of a shutter device as described in any one of claims 1 to 11, characterized in that the shutter curtain when fully closed separates the inside and outside of the room, and the multiple rod-shaped members are arranged at a portion of the seat plate on the inside of the room.

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