Shutter device seat structure

Abstract

To provide a seat plate structure for a shutter apparatus, which can adjust the strength of a shutter curtain for a seat plate in a thickness direction when necessary.SOLUTION: A shutter curtain moves to open / close being guided by guide rails arranged on both right and left sides. An end of the shutter curtain on a closed side is a seat plate 4. In the seat plate 4, for example, a plurality of rod-like members 23 to 28 are arranged via storage members 21 and 22 so as to be developable and foldable in a thickness direction of the shutter curtain. The rod-like members 23 and 26 among the rod-like members 23 to 28, with a longitudinal direction set as a longitudinal direction of the seat plate 4, are reinforcement members 45 and 46 parallel to the seat plate 4 in both the states of being developed and folded.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a seat plate structure for a shutter device installed at the entrances and exits of buildings, and in particular to a seat plate structure that enables adjustment of the strength of the seat plate provided at the closing end of a shutter curtain that moves open and closed. [Background technology]

[0002] As shown in Patent Document 1 below, a shutter device installed at an entrance or exit of a building 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 end on the closing side serving as a seat plate. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2020-70672 Summary of the Invention [Problem to be solved by the invention]

[0004] In shutter devices installed at building entrances and exits, for example, during strong typhoon winds, the shutter curtain is subjected to strong wind pressure when fully closed. Therefore, not only in shutter devices in which the longitudinal ends of the seat plate, which has a length dimension in the width direction of the shutter curtain (left and right), are not inserted inside the guide rails, but also in shutter devices in which at least a portion of each longitudinal end of the seat plate is inserted inside the guide rails, there is a risk that the seat plate will bend significantly in the thickness direction of the shutter curtain, causing a gap to form between the seat plate and the floor. Therefore, when there is a risk of the shutter curtain being subjected to strong wind pressure, it is necessary to increase the strength of the seat plate in the thickness direction of the shutter curtain.

[0005] An 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. [Means for solving the problem]

[0006] The seat plate structure of a shutter device according to the present invention is a seat plate structure for a shutter device comprising guide rails arranged on both the left and right sides, and a shutter curtain that moves open and closed along these guide rails, with the end on the closing side serving as the seat plate, and is characterized in that a plurality of rod-shaped members are arranged on the seat plate so that they can be unfolded and folded, and when these rod-shaped members are unfolded, the strength of the shutter curtain in the thickness direction of the seat plate is increased.

[0007] In this way, in the seat plate structure of the shutter device of the present invention, multiple rod-shaped members are arranged on the seat plate so that they can be unfolded and folded, and when these rod-shaped members are unfolded, 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 large wind pressure due to strong typhoon winds will act on the shutter curtain, the strength of the seat plate can be increased by unfolding the multiple rod-shaped members that were arranged folded on the seat plate.

[0008] Furthermore, if there is no longer a need to increase the thickness-wise strength of the shutter curtain on the seat board due to the passage of a typhoon or other reason, the multiple rod-shaped members can be folded and placed on the seat board, thereby reducing the overall dimensions of the seat board including the multiple rod-shaped members and allowing the shutter curtain to be opened and closed.

[0009] In the present invention described above, the direction in which the multiple rod-shaped members are unfolded and folded relative to the seat plate may be the vertical direction, or the horizontal direction which is the width direction of the shutter curtain, or the thickness direction of the shutter curtain, or a direction diagonal to the vertical direction and the horizontal direction, or a direction diagonal to the vertical direction and the thickness direction of the shutter curtain, or a direction diagonal to the horizontal direction and the thickness direction of the shutter curtain.

[0010] Of these, if the direction in which the multiple rod-shaped members are unfolded and folded relative to the seat plate is the thickness direction of the shutter curtain, 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.

[0011] Furthermore, by unfolding a plurality of rod-shaped members that are arranged on the seat board so as to be unfoldable and foldable in the thickness direction of the shutter curtain, a structure for increasing the thickness direction of the shutter curtain for the seat board can be achieved by unfolding the plurality of rod-shaped members in various forms. One example of such a form is that the unfolded plurality of rod-shaped members include a reinforcing member that becomes parallel or approximately parallel to the seat board when unfolded and increases the strength of the shutter curtain for the seat board in the thickness direction. Another example of such a form is that two rod-shaped members that are arranged with their base ends spaced apart in the length direction of the seat board, which is the width direction of the shutter curtain, are swung around their base ends to connect the tips of these rod-shaped members, thereby forming a triangular structure with these rod-shaped members and the seat board.

[0012] Of these, if the structure for increasing the thickness direction of the shutter curtain for the seat plate is such that the multiple unfolded rod-shaped members include a reinforcing member that becomes parallel or approximately parallel to the seat plate when unfolded, thereby increasing the strength of the shutter curtain for the seat plate in the thickness direction, then since this reinforcing member becomes parallel or approximately parallel to the seat plate, the strength of this reinforcing member can be utilized to increase the strength of the shutter curtain for the seat plate in the thickness direction.

[0013] Furthermore, the fact that the multiple unfolded rod-shaped members include reinforcing members that become parallel or approximately parallel to the seat plate when unfolded, 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 members form part of a parallelogram link mechanism that allows the reinforcing members to be unfolded and folded while remaining parallel to the seat plate.

[0014] 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 reinforcing member form a parallelogram link mechanism are arranged apart in the lengthwise direction of the seat plate, which is the widthwise direction of the shutter curtain, in order to connect the seat plate and reinforcing member, and these rod-shaped members are arranged at an angle to the lengthwise 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 shutter curtain in the thickness direction of the seat plate.

[0015] Furthermore, when the seat plate structure of the shutter device of the present invention is configured in this manner, the angle formed by the two rod-shaped members in the longitudinal direction of the seat plate may be 90 degrees or an angle other than 90 degrees, as 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.

[0016] Furthermore, when the seat plate structure of the shutter device according to the present invention is based on the above-mentioned parallelogram link mechanism, two such parallelogram link mechanisms may 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 lengthwise direction of the seat plate may be opposite angles, and the two reinforcing members in the two parallelogram link mechanisms may be connected with a fastener, thereby making it possible to prevent the two rod-shaped members in each of the two parallelogram link mechanisms from swinging relative to the seat plate.

[0017] In addition, when the seat plate structure of the shutter device of the present invention is made up of two upper and lower parallelogram link mechanisms, the opposite angles that each of the two rod-shaped members in each of these parallelogram link mechanisms makes with the longitudinal direction of the seat plate are made to be angles other than 90 degrees.

[0018] Furthermore, 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 lengthwise direction of the seat plate are opposite to each other, and the two reinforcing members in the two upper and lower parallelogram link mechanisms are connected with a fastener, thereby making the two rod-shaped members in each of the two upper and lower parallelogram link mechanisms unable to swing relative to the seat plate.In this case, the fastener for connecting the two reinforcing members in the two upper and lower parallelogram link mechanisms may also be a fastener for connecting these reinforcing members to the seat plate when the two reinforcing members are folded and placed on the seat plate.

[0019] With this, 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 link mechanisms, thereby enabling the fasteners to be used for multiple purposes.

[0020] The number of fasteners used to connect the two reinforcing members in the two parallelogram link mechanisms and thereby 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 and the fasteners are arranged in the longitudinal direction of the reinforcing members, which is the longitudinal direction of the seat plate, it is preferable to connect the two reinforcing members to the seat plate with the two fasteners when they are folded and arranged on the seat plate, 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 are folded and arranged on the seat plate.

[0021] According to this, when the two reinforcing members are folded and placed on the seat board, the thickness-wise strength of the shutter curtain for the seat board is increased by the two reinforcing members when these reinforcing members are connected to the seat board with 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 board, the distance between the two fasteners when the two reinforcing members are connected is made larger than the distance between the two fasteners when the two reinforcing members are folded and placed on the seat board and connected to the seat board.This makes it possible to increase the thickness-wise strength of the shutter curtain for the seat board by the lengths of the two reinforcing members that correspond to the distance between these fasteners.Therefore, the thickness-wise strength of the shutter curtain for the seat board, which can be increased by the two unfolded reinforcing members, can be made greater than the thickness-wise strength of the shutter curtain for the seat board when these reinforcing members are connected to the seat board with the two fasteners when the two reinforcing members are folded and placed on the seat board.

[0022] When the seat plate structure of the shutter device of the present invention is configured in this manner, 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, in order to prevent the two rod-shaped members in each of the two upper and lower parallelogram link mechanisms from swinging relative to the seat plate.

[0023] As a result, the two fasteners connect the two reinforcing members near both end faces in the longitudinal direction of these reinforcing members, so that the thickness-wise strength of the shutter curtain for the seat plate can be increased by utilizing almost the entire length dimension of these reinforcing members.

[0024] Furthermore, in the seat plate structure of the shutter device according to the present invention, as described above, the unfolding and folding direction 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, thereby increasing the strength of the shutter curtain in the thickness direction for 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, and one end of the length direction of the reinforcing member may be swingably connected to one of the two rod-shaped members, and when the reinforcing member becomes parallel or approximately parallel to the seat plate when unfolded, thereby increasing the strength of the shutter curtain in the thickness direction for the seat plate, the other end of the length direction of the reinforcing member may be swingably connected to the other of the two rod-shaped members that is at an opposite angle to the length direction of the seat plate by swinging it relative to the seat plate around its base end, and connected to the other of the two rod-shaped members by a connector, so that these rod-shaped members cannot swing around their respective base ends.

[0025] Even when the seat plate structure of the shutter device of the present invention is configured in this manner, the reinforcing member, which becomes parallel or approximately parallel to the seat plate when unfolded, can increase the strength of the shutter curtain in the thickness direction of the seat plate.

[0026] Furthermore, as described above, the direction in which the multiple rod-shaped members are unfolded and folded relative to the seat plate is the thickness direction of the shutter curtain, and these rod-shaped members include reinforcing members that become parallel or approximately parallel to the seat plate when unfolded to increase 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 these rod-shaped members are swingably connected to the seat plate, and one end of the reinforcing member in the length direction is swingably connected to one of the two rod-shaped members. When the reinforcing member is unfolded to become 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 longitudinal end of the reinforcing member can be connected by a connector to the other of the two rod-shaped members, which have opposite angles to the longitudinal direction of the seat plate by swinging relative to the seat plate around their respective base ends, and in this case these rod-shaped members cannot swing around their respective base ends, the connector can also be used to connect these rod-shaped members to the seat plate when the two rod-shaped members are folded and placed on the seat plate.

[0027] According to this, 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.

[0028] As described above, the direction in which the plurality of rod-shaped members are unfolded and folded relative to the seat plate is the thickness direction of the shutter curtain, and among these rod-shaped members, a reinforcing member is included that becomes parallel or approximately parallel to the seat plate when unfolded, thereby increasing the strength of the shutter curtain in the thickness direction for this seat plate. Two of the plurality of 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 swingably connected to the seat plate. One end of the reinforcing member in the length direction is swingably connected to one of the two rod-shaped members, and becomes parallel or approximately parallel to the seat plate when unfolded. When the other longitudinal end of the reinforcing member is parallel to the seat plate and increases the thickness-wise strength of the shutter curtain, it can be connected to the other of the two rod-shaped members, which have opposite angles to each other relative to the longitudinal direction of the seat plate when they are swung relative to the seat plate around their respective base ends, by a fastener, and in this case these rod-shaped members cannot swing around their respective base ends, the fastener can be a first fastener, and the tip ends of the two rod-shaped members, which have opposite angles to each other relative to the longitudinal direction of the seat plate when they are swung relative to the seat plate around their respective base ends, can be connected to each other by a second fastener.

[0029] According to this, the tip ends of the two rod-shaped members are joined together by the second joining device, and therefore these rod-shaped members can be made unable to swing around the respective base ends.

[0030] Furthermore, when the seat plate structure of the shutter device of the present invention is configured in this manner, the above-mentioned first and second fasteners may be fasteners for connecting the two rod-shaped members to the seat plate when the two rod-shaped members are folded and placed on the seat plate.

[0031] According to this, when the two rod-shaped members are folded and placed on the seat plate, of the first and second fasteners used to connect these rod-shaped members to the seat plate, the first fastener 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 tip ends of the two rod-shaped members to each other, making it possible to use the first and second fasteners for multiple purposes.

[0032] Furthermore, when the two rod-shaped members are folded and placed on the seat plate in this manner and these rod-shaped members and the seat plate are connected using a first fastener and a second fastener, it is preferable that the length from one end to the other end in the longitudinal direction of the reinforcing member be greater than the distance between the first fastener and the second fastener that connect the two rod-shaped members to the seat plate when they are folded and placed on the seat plate.

[0033] According to this, when the two rod-shaped members are folded and placed on the seat board, and these rod-shaped members and the seat board are connected with the first and second connecting members, the thickness-wise strength of the shutter curtain for the seat board is increased by the two rod-shaped members.However, 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 connecting members that connect the two rod-shaped members to the seat board when they are folded and placed on the seat board, the thickness-wise strength of the shutter curtain for the seat board can be sufficiently increased by effectively utilizing the length dimension of almost the entire reinforcing member.

[0034] In the seat plate structure of the shutter device according to the present invention described above, the multiple rod-shaped members that are 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 so that when the multiple rod-shaped members are folded and arranged on the seat plate, these rod-shaped members are stored inside the storage member.

[0035] In this way, by providing a storage member on the seat board and storing multiple rod-shaped members inside the storage member when they are folded and placed on the seat board, the storage member can effectively protect the multiple rod-shaped members from external forces, etc. when they are folded and placed on the seat board.

[0036] Furthermore, 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 if the unfolding and folding direction of the multiple rod-shaped members relative to the seat board is the thickness direction of the shutter curtain as described above, it is preferable that the storage member be formed from a channel member that opens toward the thickness direction of the shutter curtain.

[0037] According to this, the storage member for storing multiple rod-shaped members inside when they are folded and placed on the seat plate is formed by 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.

[0038] 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, such as an entrance shutter device that opens and closes the entrance to a building, garage, etc., and another shutter device is a window shutter device. Furthermore, the seat plate structure of the shutter device according to the present invention can be applied to disaster prevention shutter devices in which the shutter curtain is fully closed to form a disaster prevention compartment in the event of a fire or the like, and in which pressure from flames, smoke, etc., or negative pressure from exhaust air acts on the shutter curtain, and can also be applied to shutter devices in which the shutter curtain is fully closed to make it waterproof.

[0039] 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, etc., or to renovated shutter devices, or may even be applied to shutter devices that have already been installed.

[0040] Furthermore, the seat plate structure of the shutter device of the present invention can be applied to slat-type shutter devices in which the entire, almost 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 large number of panels, sheet-type shutter devices formed from a sheet, and even composite shutter devices formed from a combination of these components.

[0041] Furthermore, each of the multiple rod-shaped members used in the seat plate structure of the shutter device of the present invention may be formed from a channel material, or from an angle material, or from a flat bar, or from a hollow or solid member having a square or circular cross section. [Effects of the Invention]

[0042] According to the present invention, it is possible to obtain the effect that the strength of the shutter curtain in the thickness direction of the seat plate can be adjusted as required. [Brief explanation of the drawings]

[0043] [Figure 1] FIG. 1 is a front view showing the entire shutter device to which a seat plate structure according to a first embodiment of the present invention is applied. [Figure 2] FIG. 2 is a cross-sectional view taken along line S2-S2 in FIG. [Figure 3] FIG. 3 is a cross-sectional view taken along line S3-S3 in FIG. 1, showing the state when the shutter curtain is fully closed. [Figure 4]Figure 4 is a perspective view showing the seat plate shown in Figures 1 to 3 and multiple rod-shaped members arranged on the seat plate so that they can be unfolded and folded, and shows the state when the multiple rod-shaped members are folded. [Figure 5] FIG. 5 is a diagram showing a state in which a parallelogram link mechanism is formed by unfolding the plurality of rod-shaped members shown in FIG. [Figure 6] 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. [Figure 7] 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. [Figure 8] FIG. 8 is a plan view showing a state in which two parallelogram link mechanisms, one above the other, are formed and the reinforcing members constituting a part of these parallelogram link mechanisms are joined together by a joining tool. [Figure 9] FIG. 9 is a view similar to FIG. 1, showing a seat panel structure according to a second embodiment. [Figure 10] FIG. 10 is a cross-sectional view taken along line S10-S10 in FIG. [Figure 11] FIG. 11 is a view similar to FIG. 4, showing a seat panel structure according to a second embodiment. [Figure 12] FIG. 12 is a view similar to FIG. 5, showing a seat panel structure according to a second embodiment. [Figure 13] FIG. 13 is a view similar to FIG. 6, showing a seat panel structure according to a second embodiment. [Figure 14] FIG. 14 is a view similar to FIG. 7, showing a seat panel structure according to a second embodiment. [Figure 15] FIG. 15 is a view similar to FIG. 8, showing a seat panel structure according to a second embodiment. [Figure 16] FIG. 16 is a view similar to FIG. 1, showing a seat panel structure according to a third embodiment. [Figure 17] FIG. 17 is a cross-sectional view taken along line S17-S17 in FIG. [Figure 18]FIG. 18 is a view similar to FIG. 4, showing a seat panel structure according to a third embodiment. [Figure 19] FIG. 19 is a perspective view showing a state in which two of the plurality of rod-shaped members shown in FIGS. 17 and 18 are deployed. [Figure 20] FIG. 20 is a view similar to FIG. 5, showing a seat panel structure according to a third embodiment. [Figure 21] FIG. 21 is a view similar to FIGS. 6 and 7, showing a seat panel structure according to a third embodiment. [Figure 22] FIG. 22 is a view similar to FIG. 8, showing a seat panel structure according to a third embodiment. [Figure 23] FIG. 23 is a view similar to FIG. 1, showing a seat panel structure according to a fourth embodiment. [Figure 24] FIG. 24 is a cross-sectional view taken along line S24-S24 in FIG. [Figure 25] FIG. 25 is a view similar to FIG. 4, showing a seat panel structure according to a fourth embodiment. [Figure 26] FIG. 26 is a view similar to FIG. 19, showing a seat panel structure according to a fourth embodiment. [Figure 27] FIG. 27 is a view similar to FIG. 20, showing a seat panel structure according to a fourth embodiment. [Figure 28] FIG. 28 is a view similar to FIG. 21, showing a seat panel structure according to a fourth embodiment. [Figure 29] FIG. 29 is a view similar to FIG. 22, showing a seat panel structure according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0044] An embodiment of the present invention will be described below with reference to the drawings. Fig. 1 shows a front view of a shutter device having a seat plate structure according to one embodiment of the present invention. This shutter device is an entrance shutter device installed at the entrance of a building such as a warehouse. This entrance shutter device has a shutter curtain 2 attached to a building frame such as a wall and guided by guide rails 1 arranged on both the left and right sides, which can be freely opened and closed up and down. The shutter curtain 2 has a curtain body 3 and a seat plate 4 attached to the lower end of the curtain body 3. The curtain body 3, which forms substantially the entire shutter curtain 2, has many slats 5 arranged vertically. The upper end of the curtain body 3 is connected to a horizontal winding shaft 7 which 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, and 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 which is made up of a sprocket wheel, chain or the like, and the forward and reverse rotational driving force from the electric motor of the opening / closing device 8 causes the winding shaft 7 to rotate forward and reverse, thereby winding and unwinding the shutter curtain 2 on the winding shaft 7, and the shutter curtain 2 is guided by guide rails 1 on both the left and right sides and moves up and down to open and close.

[0045] The shutter curtain 2, whose lower end on the closing side is a seat plate 4, moves downward to close, and when this seat plate 4 reaches the floor 10 of the entrance / exit, the shutter curtain 2 is fully closed, and when the shutter curtain 2 moves upward to open, 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 up and down, the shutter curtain 2 is fully opened.

[0046] As described above, the shutter device of this embodiment is an electric shutter device in which the shutter curtain 2 moves open and closed in the vertical direction by the driving force from the opening and closing mechanism 8, but the seat plate structure that will be described below has a return spring 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 winding shaft in rotating forward to move the shutter curtain open upward, and this return spring force allows the shutter curtain to be moved open slightly upward by manual operation, and can also be applied to manual shutter devices.

[0047] As shown in Fig. 1, the left and right portions of the curtain body 3 of the shutter curtain 2 are inserted into guide rails 1, and inside these guide rails 1, slip-out prevention members 12 are attached to both the 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 slip-out prevention members 12 according to this embodiment are T-shaped with protrusions 12A that protrude 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 portions of the curtain body 3 are inserted, in order to reduce the opening width dimension in the thickness direction of the shutter curtain 2 for this opening 1A.

[0048] Therefore, when the shutter curtain 2 is fully closed or during opening and closing movement, even if wind pressure from strong typhoon winds, for example, acts on the shutter curtain 2 in the thickness direction of the shutter curtain 2, causing the curtain body 3 to bend and deform in the thickness direction of the shutter curtain 2, the protrusion 12A of the anti-slip member 12 engages with the lip portions 1B, 1C of the guide rail 1, thereby preventing the left and right sides of the curtain body 3 from slipping out from inside the guide rail 1.

[0049] 3 is a cross-sectional view taken along line S3-S3 in FIG. 1 when the shutter curtain 2 is fully closed and the seat panel 4 reaches the floor 10 of the entranceway in FIG. 1. As shown in FIG. 3, the seat panel 4 according to this embodiment has a rising portion 14 that rises vertically from a seat panel main body 13 having a box-shaped cross section, and the lowest slat 5A of the multiple slats 5 is connected to this rising portion 14 with fasteners such as screws or rivets. As shown in FIG. 1, the left and right ends of the seat panel main body 13 and the rising portion 14 are not inserted into the guide rails 1 on both sides, and the left and right ends of the lowest slat 5A are inserted into the guide rails 1. Note that the left and right ends of the rising portion 14 may be inserted into the guide rails 1 on both sides, or insert members that are inserted into the guide rails 1 on both sides may be connected to the left and right ends of the seat panel main body 13.

[0050] As shown in Figure 3, when the shutter curtain 2 is fully closed and the seat board 4 reaches the floor 10 of the entrance / exit, the shutter curtain 2 divides the entrance / exit 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, one on the inside of the room, are attached to one of the two sides of the shutter curtain 2 in the thickness direction of the seat board 4, and of these storage members 21, 22, the upper storage member 21 is fixed to the rising part 14 and the lower storage member 22 is fixed to the seat board 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 that the upper storage member 21 consists of a web portion 21A joined to the rising portion 14 by welding or screws, etc., and two upper and lower flange portions 21B, 21C extending 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 joined to the inside-of-the-room surface 13A of the seat panel main body 13 by welding or screws, etc., and two upper and lower flange portions 22B, 22C extending parallel to the inside of the room from both the upper and lower ends of this web portion 22A.

[0051] FIG. 4 shows the seat panel 4, two upper and lower storage members 21, 22, and a plurality of rod-shaped members that are stored in the storage members 21, 22 so as to be able to be unfolded and folded, and are thereby arranged on the seat panel 4 so as to be able to be unfolded and folded. These rod-shaped members are also shown in FIG. 3 and also in FIG. 5, which shows the rod-shaped members in an unfolded state. The rod-shaped members stored in the upper storage member 21 are the first rod-shaped member 23 shown in FIGS. 3 to 5, the second rod-shaped member 24 shown in FIGS. 3 and 5, and the third rod-shaped member 25 shown in FIGS. 4 and 5. The rod-shaped members stored in the lower storage member 22 are the fourth rod-shaped member 26 shown in FIGS. 3 to 5, the fifth rod-shaped member 27 shown in FIGS. 3 to 5, and the sixth rod-shaped member 28 shown in FIG. 5.

[0052] As can be seen from Fig. 3, these rod-shaped members 23-28 are formed from channel material, just like the two upper and lower storage members 21, 22, and the openings of the rod-shaped members 23-28 face the outside of the room when they are folded onto the seat panel 4 and stored inside the two upper and lower storage members 21, 22. Also, at this time, as shown in Fig. 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.

[0053] Furthermore, when stored inside the two upper and lower 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 board 4, which is the width direction of the shutter curtain 2 as shown in Figure 1.

[0054] As can be seen from FIG. 5 , the second rod-shaped member 24 and the third rod-shaped member 25, as well as the fifth rod-shaped member 27 and the sixth rod-shaped member 28, are spaced apart in the longitudinal direction of the storage members 21 and 22, which is the longitudinal direction of the seat panel 4. The base end of the second rod-shaped member 24 is pivotally connected to the upper storage member 21 by a pin 29, which is an axial member whose axis is in the vertical direction, and the tip end of the second rod-shaped member 24 is pivotally connected to the first rod-shaped member 23 by a pin 30, which is an axial member whose axis is in the vertical direction. This pin 30 is also shown in FIG. 3 . The base end of the third rod-shaped member 25 is pivotally connected to the upper storage member 21 by a pin 31, which is an axial member whose axis is in the vertical direction, as shown in FIG. 5 , and the tip end of the third rod-shaped member 25 is pivotally connected to the first rod-shaped member 23 by a pin 32, which is an axial member whose axis is in the vertical direction.

[0055] 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 a pin 33, which is an axial member whose axis is in the vertical direction, and the tip end of the fifth rod-shaped member 27 is swingably connected to the fourth rod-shaped member 26 by a pin 34 (Figs. 5 and 7), which is an axial member whose axis is in the vertical direction. Of these pins 33, 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 a pin 35, which is an axial member whose axis is in the vertical direction, and the tip end of the sixth rod-shaped member 28 is swingably connected to the fourth rod-shaped member 26 by a pin 36 (Figs. 5 and 7), which is an axial member whose axis is in the vertical direction.

[0056] 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 as to be able to unfold and fold 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 as to be able to unfold and fold 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.

[0057] In the above, the first and fourth rod-shaped members 23, 26 have the same length, and the second, third, fifth, and sixth rod-shaped members 24, 25, 27, 28 also have the same length. Furthermore, when the first to sixth rod-shaped members 23 to 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 positions both in the left-right direction and in the thickness direction of the shutter curtain 2, the second and fifth rod-shaped members 24, 27 are also arranged at the same positions both in the left-right direction and in the thickness direction of the shutter curtain 2, and the third and sixth rod-shaped members 25, 28 are also arranged at the same positions both in the left-right direction and in 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.

[0058] As mentioned above, in order to enable 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 position in the thickness direction of the shutter curtain 2, as shown in Figure 3, the tips of the two upper and lower flange portions 21B, 21C in the upper storage member 21 extend toward the room side in the thickness direction of the shutter curtain 2 to the same position as the tips of the two upper and lower flange portions 22B, 22C in the lower storage member 22.

[0059] Furthermore, when the first to sixth rod-shaped members 23 to 28 are stored inside the two upper and lower storage members 21, 22 by being folded against the seat plate 4, the entire second rod-shaped member 24 is stored inside the first rod-shaped member 23, as can be seen from Figure 4, and therefore, as shown in Figure 5 and Figure 6 described below, a recess 23A is provided in the first rod-shaped member 23 to avoid interference with the aforementioned pin 29.Furthermore, as can be seen from Figure 4, the entire sixth rod-shaped member 28 is stored inside the fourth rod-shaped member 26, and therefore, as shown in Figures 5 and 7, a recess 26A is also provided in the fourth rod-shaped member 26 to avoid interference with the aforementioned pin 35.

[0060] Furthermore, as shown in Figure 6, holes 37 and 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 Figure 7, holes 39 and 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.

[0061] Under normal circumstances, the first to third rod-shaped members 23 to 25 are folded against 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 against the seat board 4 and stored inside the lower storage member 22, and in this state the shutter curtain 2 opens and closes in the vertical direction. Then, in the event that a situation arises in which it is expected that large wind pressure due to strong typhoon winds will 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 to 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' indicated by the two-dot chain line in Figure 6, and will spread out the fourth to sixth rod-shaped members 26 to 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' indicated by the two-dot chain line in Figure 7.

[0062] The first to third rod-shaped members 23 to 25 are deployed relative to the seat plate 4 in this manner, so that the second and third rod-shaped members 24, 25 form an acute angle with the longitudinal direction of the seat plate 4, which is also the longitudinal direction of the upper storage member 21, as in the second and third rod-shaped members 24', 25' shown by the two-dot chain line in FIG. 6, and the fourth to sixth rod-shaped members 26 to 28 are deployed relative to the seat plate 4 in a manner that the fifth and sixth rod-shaped members 27, 28 form an acute angle with the longitudinal direction of the seat plate 4, which is also the longitudinal direction of the lower storage member 22, as in the fifth and sixth rod-shaped members 27', 28' shown by the two-dot chain line in FIG. 7. However, as described above, the first to sixth rod-shaped members 26 to 28 are deployed relative to the seat plate 4 in a manner that the fifth and sixth rod-shaped members 27, 28 form an acute angle with the longitudinal direction of the seat plate 4, which is also the longitudinal direction of the lower storage member 22, as in the fifth and sixth rod-shaped members 27', 28' shown by the two-dot chain line in FIG. When the rod-shaped members 23 to 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 longitudinal 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 longitudinal 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 longitudinal 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 longitudinal direction of the seat plate 4 are opposite angles but of the same magnitude, allowing the first to third rod-shaped members 23 to 25 and the fourth to sixth rod-shaped members 26 to 28 to be deployed relative to the seat plate 4.

[0063] As a result, as shown in Figures 5 and 6, an upper parallelogram link mechanism 41 is formed by the upper storage member 21 attached to the seat plate 4 and the first to third rod-shaped members 23 to 25, and as shown in Figures 5 and 7, a lower parallelogram link mechanism 42 is formed by the lower storage member 22 attached to the seat plate 4 and the fourth to sixth rod-shaped members 26 to 28. At this time, the first and fourth rod-shaped members 23', 26' are parallel to the seat plate 4, and these first and fourth rod-shaped members 23', 26' reach the same position on the indoor side in the thickness direction of the shutter curtain 2.

[0064] After this, the worker performs work to connect the first rod-shaped member 23 and the fourth rod-shaped member 26 using two fasteners 43, 44 shown in Figures 5 and 8. These fasteners 43, 44 are bolts 43A, 44A and nuts 43C, 44C shown in Figure 5. The shank 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 shank 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, and then the nuts 43C, 44C shown in Figure 5 are screwed onto the ends of the shanks 43B, 44B and tightened.

[0065] As a result, the first and fourth rod-shaped members 23 and 26, which are components that constitute part of the parallelogram link mechanisms 41 and 42, are joined together by the two fasteners 43 and 44, and the second and third rod-shaped members 24 and 25 and the fifth and sixth rod-shaped members 27 and 28 are unable to swing relative to the seat plate 4 around their respective base ends that are connected to the storage members 21 and 22 by the pins 29, 31, 33 and 35. As a result, the two upper and lower parallelogram link mechanisms 41 and 42 maintain the parallelogram shape shown in Figures 6 and 7. This state is also shown in Figure 8.

[0066] The above-described work is 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 work is 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.

[0067] 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 caused by 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 in Figure 5 which resist the seat plate 4 from bending and deforming in the thickness direction of the shutter curtain 2. In other words, the first and fourth rod-shaped members 23, 26, which are components that constitute part of the parallelogram link mechanisms 41, 42, serve as reinforcing members 45, 46 for increasing the strength of the seat board 4 in the thickness direction of the shutter curtain 2, thereby preventing a gap from occurring between the seat board 4 and the floor 10 of the entrance / exit shown in Figure 1 due to the seat board 4 being significantly bent and deformed in the thickness direction of the shutter curtain 2.

[0068] In addition, in this embodiment, there are two reinforcing members 45, 46, one at the top and one at the bottom, for increasing the strength of the shutter curtain 2 in the thickness direction for the seat board 4, so 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 two rod-shaped members 27, 28 each in two upper and lower parallelogram link mechanisms 41, 42, and these two rod-shaped members 24, 25 and two rod-shaped members 27, 28 form acute angles in opposite directions with respect to the length direction of the seat board 4, so the length range in the length direction of the seat board 4 over which the reinforcing members 45, 46 are connected to the seat board 4 by the rod-shaped members 24, 25, 27, 28 is large, so that the strength of the shutter curtain 2 in the thickness direction for the seat board 4 can be sufficiently increased in this respect as well.

[0069] 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 the like, the worker removes the two fasteners 43, 44 and folds the first to third rod-shaped members 23 to 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 to 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 to 28, and in this state the shutter curtain 2 can be opened and closed in the vertical direction.

[0070] Furthermore, in this embodiment, all of the rod-shaped members 23 to 28 are arranged on the seat board 4 via the storage members 21, 22, but since the rod-shaped members 23 to 28 are arranged on the seat board 4 on the inside of the room, the rod-shaped members 23 to 28 and the storage members 21, 22 for storing the rod-shaped members 23 to 28 inside can be prevented from coming into contact with rainwater, etc. during rainy weather, thereby effectively preventing the rod-shaped members 23 to 28 and the storage members 21, 22 from rusting, etc.

[0071] Furthermore, when folded onto the seat panel 4, all of the rod-shaped members 23 to 28 are stored inside the storage members 21, 22, so that the storage members 21, 22 can effectively protect these rod-shaped members 23 to 28 from external forces and the like.

[0072] Furthermore, the direction in which the rod-shaped members 23 to 28 are unfolded and folded relative to the seat plate 4 is the thickness direction of the shutter curtain 2, and the storage members 21 and 22 are formed from channel material that opens toward the inside of the room in the thickness direction of the shutter curtain 2, so that the rod-shaped members 23 to 28 can be unfolded and folded effectively relative to the storage members 21 and 22.

[0073] 9 to 15 show another embodiment of the above-described embodiment in which two upper and lower parallelogram link mechanisms 41, 42 are formed by unfolding the rod-shaped members 23 to 28. FIG. 10 is a cross-sectional view taken along line S10-S10 in FIG. 9, and FIGS. 11 to 15 are views corresponding to FIGS. 4 to 8. In this embodiment, the first rod-shaped member 23 of the first to third rod-shaped members 23 to 25 when stored inside the upper storage member 21 by folding the seat panel 4, and the fourth rod-shaped member 26 of the fourth to sixth rod-shaped members 26 to 28 when stored inside the lower storage member 22, are connected to the two upper and lower storage members 21, 22 by two fasteners 43, 44 shown in FIGS. 5 and 8, as shown in FIGS. 9 and 11.

[0074] 12, in this embodiment, holes 50 and 51 are formed in the upper storage member 21 and the lower storage member 22 at positions that coincide with 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 coincide with holes 50 and 51 when these rod-shaped members 23, 26 are stored inside the storage members 21, 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 holes 50 and 51 and that coincide with 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 coincide with holes 54 and 55 when these rod-shaped members 23, 26 are stored inside the storage members 21, 22.

[0075] 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 43B of the bolt 43A of the fastener 43 is inserted into the holes 50, 52, 53 and also into the hole 51, and the nut 43C is screwed onto the end of the shaft 43B that passes vertically through the two upper and lower storage members 21, 22 to tighten (see Figure 10), and the shaft 44B of the bolt 44A of the fastener 44 is inserted into the holes 54, 56, 57 and also into the hole 55, and the nut 44C is screwed onto the end of the shaft 44B that passes vertically through the two upper and lower storage members 21, 22 to tighten. As a result, the first and fourth rod-shaped members 23, 26, which are components that form 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 board 4 via the storage members 21, 22.

[0076] According to this embodiment, when the shutter curtain 2 opens and closes in the vertical direction, with the first to third rod-shaped members 23 to 25 stored inside the upper storage member 21 by folding them against the seat plate 4, and the fourth to sixth rod-shaped members 26 to 28 stored inside the upper storage member 21 by folding them against the seat plate 4, 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.

[0077] Furthermore, as shown in Figure 15, the two fasteners 43, 44 in this embodiment are also used as fasteners to connect and integrate the first and fourth rod-shaped members 23, 26, which become the two reinforcing members 45, 46, when the first to third rod-shaped members 23-25 stored inside the upper storage member 21 are unfolded relative to the seat plate 4 to form the upper parallelogram link mechanism 41, and the fourth to sixth rod-shaped members 26-28 stored inside the lower storage member 22 are unfolded relative to the seat plate 4 to form the lower parallelogram link mechanism 42, thereby enabling the fasteners 43, 44 to be used for multiple purposes.

[0078] Furthermore, when the first to third rod-shaped members 23 to 25 housed 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 housed 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 integrally connected by the two fasteners 43, 44. 15, the holes formed in the first and fourth rod-shaped members 23, 26 for inserting 44B are provided in positions close to both end faces of the rod-shaped members 23, 26 in the longitudinal direction, similar to the holes 37-40 shown in FIGS. 6 and 7 described above, and therefore the first and fourth rod-shaped members 23, 26 when configured as reinforcing members 45, 46 are joined by two fasteners 43, 44 at a distance slightly smaller than the length of the rod-shaped members 23, 26. On the other hand, when the first and fourth rod-shaped members 23, 26 are housed inside the two upper and lower storage members 21, 22, the rod-shaped members 23, 26 are joined to the storage members 21, 22 by the two fasteners 43, 44 and are joined to the seat plate 4 via the storage members 21, 22. Therefore, even at this time, the shutter curtain 2 for the seat plate 4 of The strength in the thickness direction is also increased by the first and fourth rod-shaped members 23 and 26.

[0079] However, as can be seen from a comparison between FIG. 11 and FIG. 12, the distance between the two fasteners 43, 44 that join the first and fourth rod-shaped members 23, 26 together when they are reinforcing members 45, 46 is larger than the distance between the two fasteners 43, 44 that join the first and fourth rod-shaped members 23, 26 to the storage members 21, 22 when they are housed inside the two upper and lower storage members 21, 22. Therefore, when the first and fourth rod-shaped members 23, 26 are joined together by the two fasteners 43, 44 and these rod-shaped members 23, 26 become reinforcing members 45, 46, the first and fourth rod-shaped members 23, 26 are housed inside the storage members 21, 22, and the two fasteners 43, 44 are housed inside the storage members 21, 22. of When connected with connectors 43 and 44 Kiyo This also increases the strength of the base plate 4 in the thickness direction of the shutter curtain 2.

[0080] That is, in this embodiment, when the first and fourth rod-shaped members 23, 26 are formed as reinforcing members 45, 46, they are joined by two fasteners 43, 44 at positions close to both longitudinal end faces of these rod-shaped members 23, 26. Therefore, the thickness-wise strength of the shutter curtain 2 with respect to the seat plate 4 can be increased by utilizing the approximately entire length dimension of the first and fourth rod-shaped members 23, 26.

[0081] 16 to 22 show an embodiment in which, when multiple rod-shaped members are deployed relative to the seat panel 4, these rod-shaped members deploy into a shape different from that of a parallelogram link mechanism, unlike the previous embodiments. In this embodiment, first to third rod-shaped members 62 to 64 are used, as shown in Fig. 17, a cross-sectional view taken along line S17-S17 in Fig. 16, and in Figs. 20 to 22. When these rod-shaped members 62 to 64 are folded relative to the seat panel 4, as shown in Fig. 17, they are stored inside a storage member 61 attached to the seat panel 4. Like the upper storage member 21 shown in the embodiment of Fig. 3, this storage member 61 is formed from a channel material consisting of a web portion 61A joined to the rising portion 14 of the seat panel 4 by welding or screws, etc., and two upper and lower flange portions 61B and 61C extending parallel to each other toward the interior from both upper and lower ends of the web portion 61A. Furthermore, like the rod-shaped members 23 to 28 in the embodiment described above, the first to third rod-shaped 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-shaped members 62 to 64 are also formed from channel material, and when stored inside the storage member 61, the rod-shaped members 62 to 64 open toward the outside of the room in the thickness direction of the shutter curtain 2.

[0082] Furthermore, as can be seen from Figure 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 its longitudinal direction is stored inside the first rod-shaped member 62, and the entire third rod-shaped member 64 in its longitudinal direction is stored inside this second rod-shaped member 63, as shown in Figure 21.

[0083] 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 longitudinal direction of the storage member 61, which is also the longitudinal direction of the seat panel 4. As shown in FIG. 21 , the base end of the first rod-shaped member 62 is pivotally connected to the storage member 61 by a pin 65, which is an axial member whose axial direction is the up-down direction, and the base end of the second rod-shaped member 63 is pivotally connected to the storage member 61 by a pin 66, which is an axial member whose axial direction is the up-down direction. When the first rod-shaped member 62 and the second rod-shaped member 63 are stored in the storage member 61, the base ends of the first rod-shaped member 62 and the second rod-shaped member 63 are positioned opposite each other in the left-right direction, which is the longitudinal 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 distal ends of the first and second rod-shaped members 62 and 63.

[0084] 21, the base end, which is one end in the longitudinal direction of the third rod-shaped member 64, is swingably connected to the second rod-shaped member 63 by a pin 69, which is an axial member with its axial direction in the up-down direction, midway between the base end and the tip end of the rod-shaped member 63, and a hole 70 is formed in the tip end, which is the other end in the longitudinal direction of the third rod-shaped member 64. The pin 69 is also shown in FIG. 17. As shown in FIG. 21, the first rod-shaped member 62 is formed with a hole 71 at a distance from the hole 67 in the tip end of the first rod-shaped member 62 that corresponds to the distance between the hole 68 in the tip end of the second rod-shaped member 63 and the pin 69, i.e., at a position from the hole 67 in the tip end of the first rod-shaped member 62 that is the same or approximately the same as the distance between the hole 68 and the pin 69.

[0085] 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.

[0086] 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 strong typhoon 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 relative to the seat board 4 by swinging the base end about the pin 65 as shown by the two-dot chain line in Fig. 21, as shown by the first rod-shaped member 62'. At the same time, the worker will pull out the second rod-shaped member 63 from inside the storage member 61 and deploy it relative to the seat board 4 by swinging the base end about the pin 66 as shown by the second rod-shaped member 63'. 19, the tip ends of the first rod-shaped member 62 and the second rod-shaped member 63, which now form opposite acute angles with respect to the longitudinal direction of the seat plate 4, are overlapped and these tip ends are joined together with a fastener 75. This fastener 75 is made of a bolt 75A and a nut 75C, similar to the fasteners 43 and 44 in the above-described embodiment, and the shaft of the bolt 43A is inserted into holes 67 and 68 provided at the tip ends of the first rod-shaped member 62 and the second rod-shaped member 63, and a nut 75C is screwed onto the end of the shaft to tighten it.

[0087] Next, the worker pulls out the third rod-shaped member 64 housed inside the second rod-shaped member 63 from inside the second rod-shaped member 63 by swinging the base end thereof about the pin 69, as shown in FIG. 21, to form the third rod-shaped member 64'' shown in FIG. 21 by the dashed-double-dot line. Thereafter, as shown in FIGS. 20 and 22, the worker connects the tip end of the third rod-shaped member 64 to the first rod-shaped member 62 with a connector 76. As can be seen from FIG. 20, the connector 76 also consists of bolts 76A and 76C. The shank of the bolt 76A is inserted into a hole 71 formed in the first rod-shaped member 62 and a hole 70 formed in the third rod-shaped member 64, and a nut 76C is screwed onto the end of the shank to tighten the bolt.

[0088] As a result, the third rod-shaped member 64 is spanned 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 since the tip ends of the first rod-shaped member 62 and the second rod-shaped member 63 are connected to each other by a connecting device 75, the base ends of these rod-shaped members 62, 63 cannot swing around the pins 65, 66.

[0089] Therefore, even if 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 as a result, the reinforcing member 77 can prevent the seat plate 4 from bending and deforming significantly in the thickness direction of the shutter curtain 2.

[0090] Also, in this embodiment, when there is no longer a need to increase the thickness-wise strength of the shutter curtain 2 for the seat board 4 due to the passage of a typhoon or the like, the worker can remove the two fasteners 75, 76, 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 thickness-wise dimension of the shutter curtain 2 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.

[0091] Furthermore, in this embodiment, all of the rod-shaped members 62 to 64 are arranged on the seat plate 4 on the indoor side, so that the rod-shaped members 62 to 64 and the storage member 61 for storing these rod-shaped members 62 to 64 inside can be prevented from coming into contact with rainwater, etc. during rainy weather, thereby effectively preventing the rod-shaped members 62 to 64 and the storage member 61 from rusting, etc.

[0092] 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.

[0093] Furthermore, the direction in which the rod-shaped members 62 to 64 are unfolded and folded relative to the seat board 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 inside of the room in the thickness direction of the shutter curtain 2, so that the rod-shaped members 62 to 64 can be unfolded and folded effectively relative to the storage member 61.

[0094] Figures 23 to 29 show another embodiment of the embodiment shown in Figures 16 to 22 described above. This embodiment also uses the first to third rod-shaped members 62 to 64 of the embodiment shown in Figures 16 to 22. 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 and 63 are connected to the storage member 61 by the two fasteners 75 and 76 shown in Figures 20 and 22.

[0095] Therefore, 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.

[0096] In this embodiment, the holes 67 and 71 formed in the first rod-shaped member 62 and shown in Figures 21 and 28 are arranged to coincide with the positions of 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.

[0097] 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 shank of bolt 76A of fastener 76 is inserted into holes 80, 71, and 82, and a nut 76C is screwed onto the end of the shank to tighten (see Fig. 24), and at the same time, the shank of bolt 75A of fastener 75 is inserted into holes 81, 67, and 83, and a nut 75C is screwed onto the end of the shank to tighten. 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 that are spaced apart in the longitudinal direction of the seat plate 4. Furthermore, 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 able to swing freely, 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 Figure 24, so the third rod-shaped member 64 does not swing around the pin 69.

[0098] Therefore, according to this embodiment, when the shutter curtain 2 is opened and closed in the vertical direction by folding the first to third rod-shaped members 62 to 64 against the seat plate 4 and storing them 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.

[0099] Furthermore, of the two fasteners 75, 76 in this embodiment, fastener 75 is intended to fasten the tips of the first and second rod-shaped members 62, 63 together when the first and second rod-shaped members 62, 63 are deployed, as shown in Figures 20 and 27, and fastener 76 is intended to fasten the first rod-shaped member 62 and the third rod-shaped member 64, so these fasteners 75, 76 can be used for multiple purposes.

[0100] 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 panel 4 at this time is 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 of this third rod-shaped member 64 is, in other words, the length from the pin 69 to the fastener 76 shown in FIGS. 20 and 27, as can be seen from a comparison between FIGS. 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, together with the storage member 61, form a triangular structure in a plan view.Therefore, when the first and second rod-shaped members 62, 63 are stored inside the storage member 61 and connected to the storage member 61 with 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 board 4, 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 with fasteners 75, 76.

[0101] 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 unfolded to make the third rod-shaped member 64 a reinforcing member 77, so these holes 67, 71 can be used for multiple purposes, which allows the number of holes formed in the first rod-shaped member 62 to be reduced, thereby maintaining the strength of this rod-shaped member 62.

[0102] In each of the embodiments described so far, the rod-shaped members 23 to 28, 62 to 64 and storage members 21, 22, 61 are arranged on the indoor side of the seat board 4, but these rod-shaped members 23 to 28, 62 to 64 and storage members 21, 22, 61 may also be arranged on the outdoor side of the seat board, or may be arranged on both the outdoor and indoor sides of the seat board. [Industrial Applicability]

[0103] The present invention can be used, for example, in a seat plate of a shutter device installed at an entrance or exit of a building. [Explanation of symbols]

[0104] 1 guide rail 2. Shutter Curtains 4 Seat board 21, 22 Storage components 23~28 Rod-shaped members 41,42 Parallelogram linkage 43,44 Connectors 45,46 Reinforcement members 61 Storage materials 62~64 Rod-shaped members 75,76 Connectors 77 Reinforcement member

Claims

1. A seat plate structure of a shutter device comprising guide rails arranged on both the left and right sides, a shutter curtain that is guided by these guide rails to move open and close, and whose closing end is a seat plate, 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 is parallel to the seat plate both when unfolded and when folded, A seat plate structure for a shutter device, characterized in that the at least one rod-shaped member serves as a reinforcing member for increasing the thickness-wise strength of the shutter curtain for the seat plate when unfolded, and is connected to the seat plate by a plurality of connecting devices spaced apart in the longitudinal direction of the seat plate when folded.

2. 2. The seat plate structure of a shutter device according to claim 1, wherein the reinforcing members are two in the vertical direction.

3. 3. The seat plate structure of a shutter device according to claim 2, wherein the two reinforcing members are connected by a plurality of fasteners spaced apart in the longitudinal direction of the seat plate when the seat plate is deployed.

4. A seat plate structure for a shutter device as described in claim 2, characterized in that two storage members are attached to the seat plate in the vertical direction, and when folded, the two reinforcing members are stored inside these storage members.

5. A seat plate structure for a shutter device as described in claim 4, characterized in that the two storage members are formed from a channel material that opens in the thickness direction of the shutter curtain.

6. A seat plate structure for a shutter device as described in claim 4 or 5, characterized in that when the two reinforcing members are folded and stored inside the two storage members, they are connected to the seat plate by the multiple connecting devices that are spaced apart in the longitudinal direction of the seat plate.

7. In the seat plate structure of the shutter device described in claim 6, the two reinforcing members are connected by a plurality of connecting members spaced apart in the longitudinal direction of the seat plate when deployed, A seat plate structure of a shutter device characterized in that these fasteners are the same as the multiple fasteners that connect the two reinforcing members to the two storage members when the shutter device is folded and stored inside the two storage members, thereby connecting the two reinforcing members to the seat plate.

8. A seat plate structure for a shutter device as described in claim 7, characterized in that the number of the multiple fasteners is two.

9. A seat plate structure for a shutter device as described in claim 8, characterized in that 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 and stored inside the two storage members.

10. A seat plate structure of a shutter device described in any one of claims 1 to 9, characterized in that when fully closed, the shutter curtain separates the inside and outside of the room, and the position of the reinforcing member on the seat plate is on the inside of the room.

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