Seat plate retainer of the shutter device

Abstract

To provide a seat retainer for shutter device which can prevent a seat plate from deflecting and deforming due to a wind pressure and the like at the time of strong wind caused by a typhoon.SOLUTION: In order to prevent deflection and deformation, in the thickness direction of a shutter curtain 2, of a seat plate 4 of a shutter device which is constituted by containing guide rails arranged on both left and right sides and the shutter curtain 2 which opens / closes and moves in the vertical direction guided by these guide rails and in which an end part on the closing side serves as the seat plate 4, a lower part of a seat plate retaining member 62 is inserted inside a totally closing seat plate contact member 10 where the seat plate 4 when reaching a totally closed position comes into contact, and by an upper part of the sea plate retaining member 62 arranged at least on one side out of both sides in the thickness direction of the shutter curtain 2, it is prevented that the seat plate 4 which has reached the totally closed position deflecting and deforming in the thickness direction of the shutter curtain 2.SELECTED DRAWING: Figure 9

Description

Technical Field

[0001] The present invention relates to a seat plate retainer for preventing the seat plate of a shutter device installed in a building or the like from being bent and deformed in the thickness direction of the shutter curtain, and can be used, for example, for a shutter device for an entrance / exit.

Background Art

[0002] As shown in Patent Document 1 below, a shutter device installed at an entrance / exit of a building includes guide rails arranged on both the left and right sides, and a shutter curtain that is guided by these guide rails and moves open and closed, with the end on the closed side serving as a seat plate.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a shutter device installed at an entrance / exit of a building, when the shutter curtain is fully closed, for example, during a strong wind caused by a typhoon, the shutter curtain receives a large wind pressure. Therefore, not only in a shutter device where the respective end portions in the length direction of the seat plate having the length dimension in the width direction of the shutter curtain in the left-right direction are not inserted into the inside of the guide rail, but also in a shutter device where at least a part of the respective end portions in the length direction of the seat plate is inserted into the inside of the guide rail, the seat plate may be greatly bent and deformed in the thickness direction of the shutter curtain, causing the seat plate to lift up, and as a result, a gap may be formed between the seat plate and the floor. Therefore, a device for preventing such bending and deformation from occurring in the seat plate is required.

[0005] The present invention provides a seat plate retainer for a shutter device that can prevent the seat plate from bending and deforming due to wind pressure or the like during strong winds caused by typhoons.

Means for Solving the Problems

[0006] The seat plate retainer of the shutter device according to the present invention is a seat plate retainer for preventing the seat plate of a shutter device configured to include guide rails arranged on both left and right sides and a shutter curtain guided by these guide rails and moving up and down for opening and closing, with the end on the closed side serving as the seat plate, from bending and deforming in the thickness direction of the shutter curtain. It includes a bridging member spanned between the shutter curtain including the seat plate and a fully closed seat plate abutting member against which the seat plate abuts when it reaches the fully closed position, and is characterized in that the bridging member arranged on at least one of both sides in the thickness direction of the shutter curtain prevents the seat plate from bending and deforming in the thickness direction of the shutter curtain when it reaches the fully closed position.

[0007] Thus, in the seat plate retainer of the shutter device according to the present invention, since the bridging member is spanned between the shutter curtain including the seat plate and the fully closed seat plate abutting member against which the seat plate abuts when it reaches the fully closed position, the strength of the seat plate at full closure is reinforced by this bridging member, and it becomes possible to prevent the seat plate from bending and deforming in the thickness direction of the shutter curtain due to wind pressure or the like during strong winds caused by typhoons.

[0008] The number of such bridging members may be one or a plurality in the length direction of the seat plate, which is the width direction of the shutter curtain.

[0009] Further, when the deflection deformation of the seat plate occurs on one side out of both sides in the thickness direction of the shutter curtain due to, for example, strong winds such as typhoons, the bridging member may be provided only on the side where the seat plate deflects out of both sides in the thickness direction of the shutter curtain. Alternatively, for example, when the deflection deformation of the seat plate occurs on both sides in the thickness direction of the shutter curtain due to wind blowing back or the like, the bridging member may be provided on both sides in the thickness direction of the shutter curtain.

[0010] Note that, as will be described later, the present invention can be applied to the seat plate of a shutter device for any use. When the present invention is applied to the seat plate of a shutter device for an entrance / exit that opens and closes the entrance / exit with a shutter curtain, the fully closed seat plate abutting member against which the seat plate abuts when reaching the fully closed position is the floor. Also, when the present invention is applied to the seat plate of a window shutter device that opens and closes a window opening with a shutter curtain, the fully closed seat plate abutting member against which the seat plate abuts when reaching the fully closed position is a lower frame member or the like of the window sash.

[0011] Also, in the present invention as described above, bridging the bridging member between the shutter curtain including the seat plate and the fully closed seat plate abutting member against which the seat plate abuts when reaching the fully closed position is performed by connecting the end portion of the bridging member on the fully closed seat plate abutting member side to this fully closed seat plate abutting member. In order to connect the end portion of the bridging member on the fully closed seat plate abutting member side to this fully closed seat plate abutting member in this way, the end portion of the bridging member on the fully closed seat plate abutting member side may be directly connected to the fully closed seat plate abutting member by a coupling tool such as a screw or a bolt. Alternatively, a connecting member may be embedded inside the fully closed seat plate abutting member, and the end portion of the bridging member on the fully closed seat plate abutting member side may be connected to the fully closed seat plate abutting member by a coupling member connected to this connecting member.

[0012] Among these, according to the latter, since the end portion of the bridging member on the fully closed seat plate abutting member side is connected to the fully closed seat plate abutting member by a coupling tool connected to the connecting member embedded inside the fully closed seat plate abutting member, this connection can be made more reliable.

[0013] In addition, when the connecting member is embedded inside the fully closed seat plate contact member in this way, and the end portion on the fully closed seat plate contact member side of the bridging member is coupled to the fully closed seat plate contact member by a coupling member connected to this connecting member, and the connecting member is a cylindrical member, and the coupling member is inserted inside this cylindrical member so that a coupling tool is connected to this cylindrical member, when the end portion on the fully closed seat plate contact member side of the bridging member is not coupled to the fully closed seat plate contact member by the coupling member, it is preferable to block the inside of the cylindrical member with a blocking member.

[0014] According to this, when the end portion on the fully closed seat plate contact member side of the bridging member is not coupled to the fully closed seat plate contact member by the coupling member, it is possible to prevent mud, dust, etc. from entering and accumulating inside the cylindrical member by the blocking member.

[0015] Also, when the inside of the cylindrical member is blocked by a blocking member when the end portion on the fully closed seat plate contact member side of the bridging member is not coupled to the fully closed seat plate contact member by the coupling member in this way, the blocking member for blocking the inside of the cylindrical member may be a dedicated member only for blocking the inside of the cylindrical member, or may be the above-mentioned coupling tool for coupling the end portion on the fully closed seat plate contact member side of the bridging member to the fully closed seat plate contact member.

[0016] Among these, according to the latter, since the inside of the cylindrical member can be blocked by the coupling tool for coupling the end portion on the fully closed seat plate contact member side of the bridging member to the fully closed seat plate contact member, it is possible to achieve the dual use of this coupling tool, and thereby reduce the number of component parts constituting the seat plate pressing tool of the shutter device according to the present invention.

[0017] Also, when the inside of the cylindrical member is blocked by a blocking member when the end portion on the fully closed seat plate contact member side of the bridging member is not coupled to the fully closed seat plate contact member by the coupling member as described above, it is preferable to make the height position of the upper surface of the blocking member when the inside of the cylindrical member is blocked coincide with or be substantially the same as the height position of the upper surface of the fully closed seat plate contact member.

[0018] According to this, when the inside of the cylindrical member is blocked, the upper surface of the blocking member does not protrude or hardly protrudes from the upper surface of the fully closed seat plate contact member, so the state of the upper surface of the fully closed seat plate contact member can be kept in a state similar to the original state.

[0019] Also, when the end on the fully closed seat plate contact member side of the bridging member is not connected to the fully closed seat plate contact member by the connecting member, and in the case where the inside of the cylindrical member is blocked by the blocking member, it is preferable to provide an operating portion on the top of the blocking member, which is operated for taking out this blocking member from the cylindrical member when taking out this blocking member from the cylindrical member.

[0020] According to this, the work of taking out the blocking member from the cylindrical member can be easily performed by the operating portion provided on the top of the blocking member.

[0021] In addition, the operating portion provided on the top of the blocking member for taking out this blocking member from the cylindrical member may be any as long as it can take out the blocking member from the cylindrical member. An example of the operating portion is, when the blocking member is a male screw member, a tool engagement groove provided on the head of the male screw member for rotationally operating this male screw member with a tool such as an electric driver. Another example of the operating portion is an operating member provided on the upper part of the blocking member so as to be able to be tilted, for example.

[0022] The seat plate presser of the shutter device according to the present invention described above can also be applied to a shutter device in which the seat plate is not divided vertically. Also, the seat plate presser of the shutter device according to the present invention can detect that the seat plate has contacted an obstacle during the closing movement of the shutter curtain or that the seat plate has reached the fully closed position, etc. Therefore, it can also be applied to a shutter device in which the seat plate is divided vertically and the seat plate includes a seat plate body and a lifting body arranged below the seat plate body so as to be vertically movable relative to the seat plate body.

[0023] When applying the seat plate retainer of the shutter device according to the present invention to a seat plate configured to include a seat plate main body and a lifting body disposed below the seat plate main body and vertically movable relative to the seat plate main body, in order to prevent the seat plate from being bent and deformed in the thickness direction of the shutter curtain by being bridged between the shutter curtain including the seat plate and the fully closed seat plate contact member, it is preferable that the above-described bridging member is bridged between the seat plate main body of the seat plate and the fully closed seat plate contact member, that is, the seat plate-side end of the bridging member is coupled to the seat plate main body.

[0024] According to this, it becomes possible to more effectively prevent the seat plate from being bent and deformed in the thickness direction of the shutter curtain than when the bridging member is bridged between the lifting body of the seat plate and the fully closed seat plate contact member, that is, than when the seat plate-side end of the bridging member is coupled to the lifting body.

[0025] Note that the bridging member in the seat plate retainer of the shutter device according to the present invention described above can be formed of any material, and this material may be a flat bar, or an angle material, or a channel material or the like. Further, the bridging member may be formed of a long member having a length in the left-right direction that is the length direction of the seat plate.

[0026] Further, in the seat plate retainer of the shutter device according to the present invention described above, the bridging member may be coupled to the shutter curtain including the seat plate even during normal times, and the end of the bridging member on the fully closed seat plate contact member side may be coupled to the fully closed seat plate contact member when strong winds due to typhoons or the like are expected, and the opening and closing movement of the shutter curtain during normal times may be performed with the bridging member attached to the shutter curtain.

[0027] In addition, the seat plate retainer of the shutter device according to the present invention is a seat plate retainer for preventing the seat plate of a shutter device configured to include guide rails arranged on both the left and right sides and a shutter curtain guided by these guide rails and moving up and down in an opening and closing manner, with the end on the closed side serving as the seat plate, from being bent and deformed in the thickness direction of the shutter curtain. The seat plate retainer includes a seat plate pressing member whose lower part is inserted into the inside of a fully closed seat plate abutting member against which the seat plate abuts when the fully closed position is reached. The upper part of the seat plate pressing member arranged on at least one side of both sides in the thickness direction of the shutter curtain prevents the seat plate from being bent and deformed in the thickness direction of the shutter curtain when the fully closed position is reached.

[0028] In the seat plate retainer of the shutter device according to this invention, the lower part of the seat plate pressing member is inserted into the inside of the fully closed seat plate abutting member against which the seat plate abuts when the fully closed position is reached, and the upper part of this seat plate pressing member can prevent the seat plate from being bent and deformed in the thickness direction of the shutter curtain when the fully closed position is reached.

[0029] The number of seat plate pressing members in the seat plate retainer of the shutter device according to this invention may also be one or a plurality in the length direction of the seat plate, which is the width direction of the shutter curtain.

[0030] Also, in the seat plate retainer of the shutter device according to this invention, when the bending deformation of the seat plate occurs, for example, due to strong winds such as typhoons, on one side of both sides in the thickness direction of the shutter curtain, the seat plate pressing member may be provided only on the side where the seat plate is bent and deformed among both sides in the thickness direction of the shutter curtain. Or, when the bending deformation of the seat plate occurs on both sides in the thickness direction of the shutter curtain due to the wind blowing back or the like, the seat plate pressing member may be provided on both sides in the thickness direction of the shutter curtain.

[0031] And also in the seat plate retainer of the shutter device according to the present invention, preventing the seat plate from being bent and deformed in the thickness direction of the shutter curtain by the seat plate retaining member can be applied to the seat plate of the shutter device for any use. When applied to the seat plate of the shutter device for an entrance / exit that opens and closes the entrance / exit with a shutter curtain, the fully closed seat plate abutting member against which the seat plate abuts when it reaches the fully closed position is the floor. Also, when applied to the seat plate of the shutter device for a window that opens and closes the window opening with a shutter curtain, the fully closed seat plate abutting member against which the seat plate abuts when it reaches the fully closed position is the lower frame member or the like of the window sash.

[0032] Also, the seat plate retaining member for preventing the seat plate from being bent and deformed in the thickness direction of the shutter curtain can be arranged at any position relative to the seat plate as long as it can prevent the seat plate from being bent and deformed in the thickness direction of the shutter curtain. One example of the position is a position displaced in the thickness direction of the shutter curtain from the seat plate when it reaches the fully closed position. Another example of the position is a position penetrating the seat plate vertically when it reaches the fully closed position.

[0033] Furthermore, the seat plate retaining member may be a member with a head, and the lower surface of this head may be made to be able to abut from above against the horizontal or substantially horizontal surface provided on the seat plate.

[0034] According to this, it is possible to prevent the seat plate from being bent and deformed in the thickness direction of the shutter curtain by the seat plate retaining member, and it is also possible to prevent the seat plate from moving in the opening direction from the fully closed position by the head provided on the seat plate retaining member.

[0035] In addition, in the seat plate pressing member of the shutter device according to the present invention, the lower part of the seat plate pressing member for preventing the seat plate from being bent and deformed in the thickness direction of the shutter curtain is inserted into the inside of the fully closed seat plate abutting member with which the seat plate abuts when the fully closed position is reached. This insertion may be performed by directly inserting the lower part of the seat plate pressing member into a hole provided in the fully closed seat plate abutting member, or a cylindrical member may be embedded inside the fully closed seat plate abutting member, and the lower part of the seat plate pressing member may be inserted into the inside of the cylindrical member so that the lower part of the seat plate pressing member is inserted into the inside of the fully closed seat plate abutting member via the cylindrical member.

[0036] Among these, according to the latter, the insertion of the lower part of the seat plate pressing member into the inside of the fully closed seat plate abutting member can be performed more reliably and stably by the cylindrical member.

[0037] And when the cylindrical member is embedded inside the fully closed seat plate abutting member as described above and the lower part of the seat plate pressing member is inserted into the inside of the cylindrical member so that the lower part of the seat plate pressing member is inserted into the inside of the fully closed seat plate abutting member via the cylindrical member, when the lower part of the seat plate pressing member is not inserted into the inside of the cylindrical member, it is preferable to block the inside of the cylindrical member at this time with a blocking member.

[0038] According to this, when the lower part of the seat plate pressing member is not inserted into the inside of the cylindrical member, it is possible to prevent mud, dust, etc. from entering and accumulating inside the cylindrical member by the blocking member.

[0039] In addition, when the inside of the cylindrical member is blocked by a blocking member when the lower part of the seat plate pressing member is not inserted into the inside of the cylindrical member in this way, the blocking member for blocking the inside of the cylindrical member may be a dedicated member only for blocking the inside of the cylindrical member, or may be the seat plate pressing member that is entirely inserted into the inside of the cylindrical member.

[0040] Among these, according to the latter, since the inside of the cylindrical member can be blocked by the seat plate pressing member for preventing the seat plate from being bent and deformed in the thickness direction of the shutter curtain, the combined use of this seat plate pressing member can be achieved, and the number of components constituting the seat plate retainer of the shutter device according to the present invention can be reduced.

[0041] Also, in the case of the seat plate retainer of the shutter device according to the present invention, when the lower part of the seat plate pressing member is not inserted into the inside of the cylindrical member, if the inside of the cylindrical member is blocked by a blocking member at this time, it is preferable that the height position of the upper surface of the blocking member when the inside of the cylindrical member is blocked is made to coincide with or be substantially the same as the height position of the upper surface of the fully closed seat plate contact member.

[0042] According to this, since the upper surface of the blocking member when the inside of the cylindrical member is blocked does not protrude or hardly protrudes from the upper surface of the fully closed seat plate contact member, the state of the upper surface of the fully closed seat plate contact member can be kept in a state similar to the original state.

[0043] Furthermore, in the case of the seat plate retainer of the shutter device according to the present invention, when the lower part of the seat plate pressing member is not inserted into the inside of the cylindrical member and the inside of the cylindrical member is blocked by a blocking member, it is preferable to provide an operation portion on the top of the blocking member, which is operated for taking out the blocking member from the cylindrical member, when taking out the blocking member from the cylindrical member.

[0044] According to this, the work of taking out the blocking member from the cylindrical member can be easily performed by the operation portion provided on the top of the blocking member.

[0045] And when removing the plug member from the cylindrical member in this way, the operation portion provided at the top of the plug member for this removal operation may be any as long as it can remove the plug member from the cylindrical member. An example of the operation portion is, when the plug member is a male screw member, a tool engagement groove provided at the head of the male screw member for rotating the male screw member with a tool such as an electric driver. Another example of the operation portion is an operation member arranged so as to be able to be tilted provided at the top of the plug member.

[0046] Furthermore, the seat plate retainer of the shutter device according to the present invention can also be applied to a shutter device in which the seat plate is not divided vertically. Also, the seat plate retainer of the shutter device according to the present invention can also be applied to a shutter device in which the seat plate is divided vertically in order to be able to detect that the seat plate has come into contact with an obstacle during the closing movement of the shutter curtain or that the seat plate has reached the fully closed position, and this seat plate includes a seat plate body and a lifting body arranged so as to be able to move up and down in the vertical direction with respect to the seat plate body below the seat plate body.

[0047] When applying the seat plate retainer of the shutter device according to the present invention to a seat plate configured to include a seat plate body and a lifting body arranged so as to be able to move up and down in the vertical direction with respect to the seat plate body below the seat plate body, the seat plate pressing member may have a vertical length extending to the seat plate body when the seat plate has reached the fully closed position, or the seat plate pressing member may have a vertical length extending to the lifting member when the seat plate has reached the fully closed position and not extending to the seat plate body.

[0048] Among these, according to the former, it becomes possible to prevent the seat plate from being bent and deformed in the thickness direction of the shutter curtain by the seat plate pressing member for both the seat plate body and the lifting body. Also, according to the latter, the vertical length dimension of the seat plate pressing member can be shortened.

[0049] Note that the seat plate pressing member in the seat plate presser of the shutter device according to the present invention can be formed of an arbitrary member, and this member may be a male screw member, or a hollow or solid rod-shaped member such as a circular cross-section or a square cross-section.

[0050] In addition, the seat plate presser of each shutter device described above can be applied to a shutter device for any use where it is expected that the shutter curtain will receive a load such as wind pressure in the thickness direction of the shutter curtain. One shutter device is a shutter device for an entrance / exit where the entrance / exit of a building, garage, etc. is opened and closed by a shutter curtain, and another shutter device is a shutter device for a window. Furthermore, the seat plate presser of each shutter device described above can also be applied to a shutter curtain that is fully closed to form a fire prevention compartment during the occurrence of a fire or the like, and a fire prevention shutter device to which pressure such as flames and smoke or negative pressure due to exhaust acts. Furthermore, it can also be applied to a shutter device in which the shutter curtain is fully closed for waterproofing.

[0051] Furthermore, the seat plate presser of each shutter device described above can be applied to a shutter device installed in a newly constructed building or the like, or a shutter device to be renovated, and furthermore, it can also be applied to an already installed shutter device or the like.

[0052] In addition, the seat plate presser of each shutter device described above can be applied to a slat type shutter device in which the entire part, substantially the entire part, or a part of the shutter curtain excluding the seat plate is formed by connecting a large number of slats, a panel type shutter device formed by connecting a plurality of panels, a sheet type shutter device formed by a sheet, and furthermore, a composite type shutter device formed by combining these members.

Effect of the Invention

[0053] According to the present invention, an effect is obtained that it becomes possible to prevent the seat plate from being bent and deformed by wind pressure or the like during strong winds caused by typhoons.

Brief Description of the Drawings

[0054]

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Embodiments for Carrying Out the Invention

[0055] The following describes embodiments for carrying out the present invention with reference to the drawings. FIG. 1 shows an overall front view of a shutter device to which a seat plate presser according to an embodiment of the present invention is applied. This shutter device is an entrance / exit shutter device installed at the entrance / exit of a building such as a warehouse. FIG. 1 is a view of the shutter device when the shutter curtain is fully closed, seen from the outdoor side. This entrance / exit shutter device includes 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 is movable up and down for opening and closing. The shutter curtain 2 includes a curtain body 3 and a seat plate 4 provided at the lower end of the curtain body 3. The curtain body 3 that forms substantially the entire shutter curtain 2 is formed by a number of slats 5 connected vertically. 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 coupled to a lowering wall or the like in the ceiling space above the ceiling 15. A driving force from an opening / closing machine 8 composed of a combination of an electric motor and a brake driven by an operation of an operation device (not shown) is transmitted to the winding shaft 7 via a transmission means 9 composed of a sprocket wheel, a chain, or the like. By the forward and reverse rotation of the winding shaft 7 due to the forward and reverse rotation driving force from the electric motor of the opening / closing machine 8, the shutter curtain 2 is wound up and fed out by the winding shaft 7, and the shutter curtain 2 is guided by the guide rails 1 on both the left and right sides and moves up and down for opening and closing.

[0056] The shutter curtain 2 with the lower end on the closing side being the seat plate 4 moves downward to close, and when this seat plate 4 abuts against the floor surface 10A of the floor member 10 at the entrance / exit, the shutter curtain 2 is fully closed. Also, when the shutter curtain 2 moves upward to open, and the seat plate 4 reaches the height position of the ridge member 11 that forms a slit in the ceiling 15 for inserting the shutter curtain 2 vertically, the shutter curtain 2 is fully open.

[0057] Note that as described above, when the shutter curtain 2 moves downward and closes, and the seat plate 4 abuts against the floor surface 10A of the floor member 10 at the entrance / exit, the seat plate 4 reaches the fully closed position. Since the upper surface thereof becomes the floor surface 10A, the floor member 10 formed of concrete, mortar, asphalt, etc. is the fully closed seat plate abutting member in the present embodiment.

[0058] As described above, the shutter device according to the present embodiment is an electric shutter device in which the shutter curtain 2 moves up and down by the driving force from the opener 8. However, the seat plate retainer to be described hereinafter has a return spring disposed inside the winding shaft. When the shutter curtain moves downward and closes, a return spring force for assisting the forward rotation of the winding shaft to move the shutter curtain upward is accumulated in this return spring. Due to this return spring force, it can also be applied to a manual shutter device that allows the shutter curtain to be gently opened upward by manual operation.

[0059] As shown in FIG. 1, of the shutter curtain 2, the left and right sides of the curtain body 3 are inserted inside the guide rails 1. Inside these guide rails 1, for each of the predetermined slats 5 of the slats 5 of the curtain body 3 that are arranged at intervals, the anti - detachment members 12 are attached to both the left and right ends of these slats 5. These anti - detachment members 12 according to the present embodiment are of a T - shape provided with protruding portions 12A protruding to both sides in the thickness direction of the shutter curtain 2 as shown in FIG. 2 which is a cross - sectional view taken along line S2 - S2 in FIG. 1. Each of the guide rails 1 is provided with lip portions 1B, 1C for reducing the opening width dimension in the thickness direction of the shutter curtain 2 with respect to the opening 1A into which the left and right sides of the curtain body 3 are inserted.

[0060] Therefore, even if the shutter curtain 2 when it has reached the fully closed position or the shutter curtain 2 during the opening and closing movement is deflected and deformed in the thickness direction of the shutter curtain 2 due to, for example, the wind pressure caused by strong winds of a typhoon acting in the thickness direction of the shutter curtain 2, the protruding portion 12A of the anti-escape member 12 engages with the lip portions 1B and 1C of the guide rail 1, thereby preventing the left and right side portions of the curtain body 3 from coming out of the inside of the guide rail 1.

[0061] FIG. 3 is a cross-sectional view taken along line S3 - S3 of FIG. 1 showing the fully closed state of the shutter curtain 2 when the seat plate 4 has reached the floor surface 10A of the floor member 10 at the entrance and exit of FIG. 1. As shown in this FIG. 3, the seat plate 4 according to the present embodiment has a standing portion 14 vertically rising from a seat plate main portion 13 having a box-shaped cross-section, and the lowermost slat 5A among a number of slats 5 is coupled to this standing portion 14 by a coupling tool such as a screw or a rivet. As shown in FIG. 1, the left and right end portions of the seat plate main portion 13 and the standing portion 14 are not inserted into the inside of the left and right guide rails 1, and the left and right end portions of the lowermost slat 5A are inserted into the inside of the guide rail 1. Note that the left and right end portions of the standing portion 14 may be inserted into the inside of the left and right guide rails 1, or insertion members to be inserted into the inside of the left and right guide rails 1 may be coupled to the left and right end portions of the seat plate main portion 13.

[0062] FIG. 3 also shows the seat plate presser 20 according to the present embodiment, which is also shown in FIG. 1. This seat plate presser 20 is disposed at the central portion in the length direction of the seat plate 4 in the left-right direction. As shown in FIG. 3, it includes a bridging member 21 disposed on the outdoor side and a bridging member 22 disposed on the indoor side, both on both sides in the thickness direction of the shutter curtain 2. These bridging members 21, 22, which are bent products of flat bars, are obliquely bridged between the seat plate 4 and the floor member 10 which serves as the above-described fully closed seat plate abutting member when the seat plate 4 reaches the fully closed position. In order to enable this bridging, reinforcing members 23, 24 formed of thick plates are fixed to the standing portion 14 of the seat plate 4 and the lowermost slat 5A with fasteners such as screws and rivets. Among the bridging members 21, 22, the end portions 21A, 22A on the seat plate 4 side that are parallel or substantially parallel to the standing portion 14 are coupled to the reinforcing members 23, 24 by coupling tools 25, 26 when the seat plate 4 reaches the fully closed position. These coupling tools 25, 26 are bolts with hexagonal heads in which the male screw portions that are the shaft portions 25A, 26A of the coupling tools 25, 26 are screwed into the female screw holes 23A, 24A formed in the reinforcing members 23, 24.

[0063] Also, inside the floor member 10, two cylindrical members 27 are embedded at positions on both sides in the thickness direction of the shutter curtain 2 when the seat plate 4 reaches the fully closed position, and at positions shifted in the thickness direction of the shutter curtain 2 from the seat plate 4. These cylindrical members 27 having bottom portions 27A are composed of an upper large-diameter portion 27B and a lower small-diameter portion 27C, and this small-diameter portion 27C is a female screw portion having a screw portion formed on the inner peripheral surface. Among the bridging members 21, 22, the end portions 21B, 22B on the floor member 10 side that are parallel or substantially parallel to the floor surface 10A of the floor member 10 are coupled to the respective cylindrical members 27 by coupling tools 28 when the seat plate 4 reaches the fully closed position. These coupling tools 28 are bolts with hexagonal heads in which the male screw portions that are the shaft portions 28A of the coupling tools 28 are screwed into the small-diameter portions 27C of the cylindrical members 27.

[0064] Thus, the coupler 28 has a shaft portion 28A that serves as a male screw portion to be inserted into the tubular member 27. When the shaft portion 28A is screwed into the small-diameter portion 27C that serves as the female screw portion of the tubular member 27, the coupler 28 is connected to the tubular member 27. Therefore, the tubular member 27 serves as a connecting member to which the coupler 28 is connected.

[0065] As described above, when the seat plate 4 reaches the fully closed position, the end portions 21A and 22A on the seat plate 4 side of the bridging members 21 and 22 arranged on both sides in the thickness direction of the shutter curtain 2 are coupled to the reinforcing members 23 and 24 by the couplers 25 and 26. Thus, these end portions 21A and 22A are coupled to the seat plate 4 by the couplers 25 and 26. At the same time, the end portions 21B and 22B on the floor member 10 side of the bridging members 21 and 22 are coupled to the respective tubular members 27 embedded inside the floor member 10 by the couplers 28. Therefore, these end portions 21B and 22B are coupled to the floor member 10 by the couplers 28. As a result, when the seat plate 4 reaches the fully closed position, these bridging members 21 and 22 are obliquely bridged between the seat plate 4 and the floor member 10. Thereby, the strength of the seat plate 4, whose width direction is the length direction of the shutter curtain 2, is reinforced by the bridging members 21 and 22 on both sides in the thickness direction of the shutter curtain 2.

[0066] For this reason, for example, the deflection deformation of the seat plate 4 toward the indoor side due to the wind pressure caused by strong winds of a typhoon can be prevented by the bridging member 22 arranged on the indoor side. Also, for example, the deflection deformation of the seat plate 4 toward the outdoor side due to the wind blowing back can be prevented by the bridging member 21 arranged on the outdoor side. Therefore, the deflection deformation of the seat plate 4 on both sides in the thickness direction of the shutter curtain 2 is blocked, and the floating up of the central portion in the length direction of the seat plate 4 due to this deflection deformation is also blocked. Thereby, it is possible to prevent a large gap from occurring between the seat plate 4 and the floor surface 10A of the floor member 10.

[0067] FIG. 4 shows a state where, due to the passage of a typhoon or the like, it becomes unnecessary to reinforce the strength of the seat board 4 by the bridging members 21 and 22. At this time, the operation of removing the bridging members 21 and 22 is performed by removing the couplers 25, 26, and 28. After that, the shutter curtain 2 is opened and closed. Further, the shaft portion 29B of the plug member 29 with the lid portion 29A formed of a hard synthetic resin or the like is press-fitted into the female screw holes 23A and 24A of the reinforcing members 23 and 24 from which the couplers 25 and 26 have been removed, whereby these female screw holes 23A and 24A are plugged by the plug member 29. Also, since the respective couplers 28 that connected the end portions 21B and 22B on the floor member 10 side of the bridging members 21 and 22 to the floor member 10 via the cylindrical members 27 are removed, the shaft portion 30B of the plug member 30 with the head portion 30A formed of a hard synthetic resin or the like is press-fitted into the inside of each cylindrical member 27 to which the coupler 28 is not connected. Thereby, the inside of these cylindrical members 27 is plugged by the plug member 30.

[0068] Therefore, when the shutter curtain 2 is normally opened and closed in the vertical direction, it is possible to prevent mud, dust, etc. from entering and accumulating inside the cylindrical member 27 by the plug member 30.

[0069] Also, when the inside of the two cylindrical members 27 is plugged by the plug members 30 in this way, the height position of the upper surface of the head portion 30A, which is the upper surface of these plug members 30, coincides with or is substantially the same as the height position of the floor surface 10A, which is the upper surface of the floor member 10. For this reason, since the head portion 30A does not protrude or hardly protrudes from the floor surface 10A, this floor surface 10A is in the same state or substantially the same state as the original floor surface. Therefore, a person passing through the above-described entrance / exit with the floor surface 10A as the lower surface can pass through as usual without particularly paying attention to the plug member 30.

[0070] Further, as shown in FIG. 4, an operation portion 30C used when taking out the closing member 30 from inside the cylindrical member 27 is provided on a head portion 30A that is the top of the closing member 30. This operation portion 30C is, for example, a knob member 31 provided with rotation center shaft portions inserted into holes formed at two opposite locations on the head portion 30A that is circular in plan view, at both ends of a semi-circular main body formed of a rigid metal wire. After standing up the knob member 31 that is tiltable with respect to the head portion 30A about these rotation center shaft portions as indicated by the two-dot chain line, by pinching this knob member 31, the closing member 30 can be taken out from inside the cylindrical member 27.

[0071] Therefore, even when the inside of the two cylindrical members 27 to which the two couplers 28 shown in FIG. 3 are not respectively connected is closed by the closing member 30 during normal times when a typhoon has not arrived, when a typhoon arrives, the work for taking out the closing member 30 from inside the cylindrical member 27 can be easily and quickly performed by using the knob member 31.

[0072] FIG. 5 shows an embodiment of a seat plate retainer 20' in which the bridging members 21 and 22 shown in FIG. 3 are used, but the two couplers 28 shown in FIG. 3 are not used, and two couplers 38 are used instead of these couplers 28. The coupler 38 in this embodiment is a bolt having a head portion 38B provided at the tip of a shaft portion 38A that is a male screw portion and is circular in plan view. An operation portion 38C for rotating the coupler 38 is formed on the upper surface of the head portion 38B that is the top of this bolt, and this operation portion 38C is a groove 39 into which a tool such as an electric driver for rotating the coupler 38 can be engaged. Further, a cylindrical member 37 embedded as an internal connecting member in the floor member 10 to connect these couplers 38 is composed of a bottom portion 37A, an upper large-diameter portion 37B, and a lower small-diameter portion 37C that is a female screw portion, similar to the cylindrical member 27 shown in FIGS. 3 and 4. The size inside the large-diameter portion 37B corresponds to the size of the head portion 38B of the coupler 38.

[0073] In this embodiment, connecting the end portions 21B and 22B on the floor member 10 side of the bridging members 21 and 22 to the floor member 10 is achieved by screwing the shaft portion 38A, which is the male screw portion of the connector 38, into the small-diameter portion 37C of the cylindrical member 37.

[0074] Also, in this embodiment, the total length in the vertical direction inside the cylindrical member 37 is the same as or greater than the total length in the vertical direction of the connector 38. For this reason, when removing the bridging members 21 and 22 as shown in FIG. 6 due to the passage of a typhoon or the like, that is, when the end portions 21B and 22B on the floor member 10 side of the bridging members 21 and 22 are not connected to the floor member 10 by the connector 38, the removed connector 38 can be directly used as a plugging member for closing the inside of the cylindrical member 37. Thereby, the connector 38 can be made to serve multiple purposes, and the reduction of the number of component parts constituting the seat plate presser 20' according to this embodiment can be realized.

[0075] Also, even in this embodiment, when the inside of the cylindrical member 37 is blocked by the connector 38, the height position of the upper surface of the head portion 38B, which is the top of the connector 38, coincides with or is substantially the same as the height position of the floor surface 10A, which is the upper surface of the floor member 10. Further, since the groove 39, which serves as the operation portion 38C described above, is formed on the upper surface of this head portion 38B, the operation of taking out the connector 38, which is a plugging member blocking the inside of the cylindrical member 37, from the inside of the cylindrical member 37 can be easily and quickly performed by engaging a tool such as an electric driver with the groove 39.

[0076] Note that instead of making the operation portion 38C a groove 39, the operation portion 38C may be the knob member 31 in FIG. 4 that can rotate the connector 38.

[0077] The seat plate presser 40 of the embodiment shown in FIG. 7 is applied to a seat plate 43 configured to include a seat plate main body 41 and a lifting body 42 disposed below the seat plate main body 41 so as to be vertically movable with respect to the seat plate main body 41. This seat plate 43 is used in a shutter device that can stop the closing movement of the shutter curtain 2 by detecting an obstacle existing at the above-described entrance / exit.

[0078] As shown in FIG. 8, among the members constituting the seat plate 43, the lifting body 42 is provided with an extension portion 42A that extends upward and enters the inside of the seat plate main body 41 from an opening 41A formed on the lower surface of the seat plate main body 41. At the tip of each of the pair of extension portions 42A provided in the thickness direction of the shutter curtain 2, a locking portion 42B protruding outward in the thickness direction of the shutter curtain 2 is provided. When the shutter curtain 2 is moving up and down or when it has reached the fully open position described above, as shown in FIG. 8, the locking portion 42B locks onto the locked portion 41B that forms the outer edge portion of the opening 41A of the seat plate main body 41 from above, so that the lifting body 42 has descended to the lowest position with respect to the seat plate main body 41. Further, inside the seat plate main body 41, a swing member 44 that can swing up and down around a shaft portion 41C and a sensor 46 such as an electric switch attached to an attachment member 45 are arranged. Further, on the lifting body 42, a pushing-up member 48 whose lower end is coupled to the lifting body 42 by a coupling tool 47 such as a rivet is erected.

[0079] During the closing movement of the shutter curtain 2 that had reached the fully open position, if there is an obstacle at the aforementioned entrance and exit, the elevator 42 abuts against this obstacle and stops, and since the seat plate body 41 further descends with respect to this elevator 42, the locking portion 42B of the extending portion 42A provided on the elevator 42 and the pushing-up member 48 swing the swing member 44 disposed inside the seat plate body 41 upward about the shaft portion 41C (see FIG. 7). As a result, the sensor 46 is activated by the swing member 44. The signal from this sensor 46 is sent wirelessly or by wire to, for example, the control device disposed in the scuttle member 11 of FIG. 1, and the drive of the electric motor of the opening / closing machine 8 in FIG. 1 is stopped and the brake is turned on by the control of this control device, so that the rotation of the winding shaft 7 stops and the shutter curtain 2 stops its closing movement. When the obstacle is removed, since the elevator 42 descends and the swing member 44 swings downward about the shaft portion 41C, due to the reverse operation of the sensor 46, the drive of the electric motor of the opening / closing machine 8 is started and the brake is turned off by the signal from the control device, so that the shutter curtain 2 starts its closing movement.

[0080] As shown in FIG. 7, even when the shutter curtain 2 is fully closed by the seat plate 43 abutting against the floor surface 10A, the sensor 46 is activated. For example, a winding shaft rotation speed detection device for detecting the rotation speed of the winding shaft 7 is disposed on the winding shaft 7 of FIG. 1, and it is detected by this winding shaft rotation speed detection device that the shutter curtain 2 has reached the fully closed position, and by the control of the aforementioned control device to which the signal from this winding shaft rotation speed detection device is sent, the drive of the electric motor of the opening / closing machine 8 is stopped and the brake is turned on, so that the closing movement of the shutter curtain 2 that has reached the fully closed position may be stopped. In this case, the signal sent from the sensor 46 is invalidated in the aforementioned control device.

[0081] Note that the lifting body 42 of the seat plate 43 in this embodiment is provided with a pushing member 48 whose lower end is connected by a coupler 47 as described above. Since this coupler 47 has a portion protruding downward from the lower surface of the lifting body 42, in this embodiment, the seat plate 43 reaching the fully closed position, in other words, the shutter curtain 2 being fully closed means that the portion of the coupler 47 protruding downward from the lower surface of the lifting body 42 abuts against the floor surface 10A.

[0082] As shown in FIG. 7, the seat plate retainer 40 of this embodiment is also configured to include a bridging member 51 disposed on the outdoor side and a bridging member 52 disposed on the indoor side, both on both sides in the thickness direction of the shutter curtain 2. These bridging members 51, 52, which are bent products of flat bars, are obliquely bridged between the seat plate body 41 of the seat plate 43 and the floor member 10 when the seat plate 43 reaches the fully closed position. To enable this bridging, reinforcing members 53, 54 are fixed to the upright portions 41D, 41E of the seat plate body 41 connected to the lowermost slat 5A by fasteners such as screws and rivets. Among the bridging members 51, 52, the ends 51A, 52A on the seat plate 43 side that are parallel or substantially parallel to the upright portions 41D, 41E are connected to the reinforcing members 53, 54 by couplers 55, 56 when the seat plate 43 reaches the fully closed position. These couplers 55, 56 are also bolts with hexagonal heads in which male threaded portions serving as the shaft portions 55A, 56A of the couplers 55, 56 are screwed into female threaded holes 53A, 54A formed in the reinforcing members 53, 54.

[0083] Also, inside the floor member 10, at positions on both sides in the thickness direction of the shutter curtain 2 when the seat plate 43 reaches the fully closed position, and at positions shifted in the thickness direction of the shutter curtain 2 from the seat plate 43, two cylindrical members 37 used in the embodiments of FIGS. 5 and 6 are embedded. Among the bridging members 51 and 52, the ends 51B and 52B on the floor member 10 side that are parallel or substantially parallel to the floor surface 10A of the floor member 10 are coupled to the respective cylindrical members 37 by coupling tools 38 also used in the embodiments of FIGS. 5 and 6 when the seat plate 4 reaches the fully closed position. These couplings are performed by screwing the male screw portion that is the shaft portion 38A of the coupling tool 38 into the small-diameter portion 37C that is the female screw portion of the cylindrical member 37.

[0084] In this embodiment, when the seat plate 43 reaches the fully closed position, the bridging members 51 and 52 are obliquely bridged between the seat plate body 41 of the seat plate 43 and the floor member 10. Thereby, the strength of the seat plate body 41, in which the width direction of the shutter curtain 2 is the length direction, is reinforced by the bridging members 51 and 52 on both sides in the thickness direction of the shutter curtain 2. For this reason, it is possible to prevent the seat plate body 41 from being bent and deformed to both sides in the thickness direction of the shutter curtain 2 due to wind pressure or the like caused by strong winds of a typhoon. Since the seat plate body 41 is the main member of the seat plate 43, by reinforcing the strength of the seat plate body 41 with the bridging members 51 and 52, it is also possible to prevent the lifting body 42 from being bent and deformed in the thickness direction of the shutter curtain 2.

[0085] Also, in this embodiment, since the cylindrical member 37 and the coupler 38 used in the embodiments of FIGS. 5 and 6 are used, the cylindrical member 37 is a connecting member to which the coupler 38 for connecting the ends 51B and 52B on the floor member 10 side of the bridging members 51 and 52 to the floor member 10 is connected. Further, when removing the bridging members 51 and 52 as shown in FIG. 8 due to the passage of a typhoon or the like, after removing the coupler 38 from the cylindrical member 37, that is, when the ends 51B and 52B on the floor member 10 side of the bridging members 51 and 52 are not connected to the floor member 10 by the coupler 38, the removed coupler 38 can be directly used as a plugging member for closing the inside of the cylindrical member 37 by inserting it into the inside of the cylindrical member 37.

[0086] Furthermore, also in this embodiment, when the inside of the cylindrical member 37 is blocked by the coupler 38, the height position of the upper surface of the head 38B, which is the top of the coupler 38, coincides with or is substantially the same as the height position of the floor surface 10A, which is the upper surface of the floor member 10. Further, since the groove 39 serving as the operation portion 38C described above is formed on the upper surface of this head 38B, the work for taking out the coupler 38, which is a plugging member for closing the inside of the cylindrical member 37, from the inside of the cylindrical member 37 can be easily and quickly performed by engaging a tool such as an electric driver with the groove 39.

[0087] Note that also in this embodiment, instead of making the operation portion 38C the groove 39, the operation portion 38C may be the knob member 31 in FIG. 4 that can rotate the coupler 38.

[0088] Also, in this embodiment, as shown in FIG. 8, when it becomes unnecessary to reinforce the strength of the seat plate 4 by the bridging members 51 and 52 due to the passage of a typhoon or the like, the shaft portion 59B of the plugging member 59 with the lid portion 59A formed of a hard synthetic resin or the like is press-fitted into the female screw holes 53A and 54A of the reinforcing members 53 and 54 from which the couplers 55 and 56 have been removed, and these female screw holes 53A and 54A are blocked by the plugging member 59.

[0089] The seat plate presser 60 of the embodiment shown in FIG. 9 is applied to the same seat plate 4 as in the embodiments of FIGS. 3 to 6. This seat plate presser 60 serves as the fully closed seat plate contact member at two locations shifted to both sides in the thickness direction of the shutter curtain 2 from the seat plate 4 that has reached the fully closed position, and includes two cylindrical members 61 embedded inside the floor member 10, and two seat plate pressing members 62 whose lower parts are inserted inside the floor member 10 by inserting the lower parts inside these cylindrical members 61.

[0090] Each cylindrical member 61, similar to the cylindrical members 27 and 37 of the previous embodiments, consists of a bottom portion 61A, an upper large-diameter portion 61B, and a small-diameter portion 61C provided below the large-diameter portion 61B and serving as an internal thread portion. The seat plate pressing member 62 is an elongated bolt with a head 62B provided at the tip of a shaft portion 62A serving as an external thread portion, and the head 62B being circular in plan view. On the upper surface of the head 62B, which is the top of this bolt, an operation portion 62C for rotating the seat plate pressing member 62 is formed as a groove 63 into which a tool such as an electric driver for rotating the seat plate pressing member 62 can be engaged.

[0091] The size inside the large-diameter portion 61B of the cylindrical member 61 corresponds to the size of the head 62B of the seat plate pressing member 62, and the total length in the vertical direction inside the cylindrical member 61 is the same as or greater than the total length in the vertical direction of the seat plate pressing member 62.

[0092] In this embodiment, as shown in FIG. 9, when the seat plate 4 has reached the fully closed position, the lower part of the shaft portion 62A, which is the male screw portion of the seat plate pressing member 62, is screwed into the small-diameter portion 61C, which is the female screw portion of the cylindrical member 61. As shown in FIG. 9, the lowering operation of the seat plate pressing member 62 performed by this screwing and rotating operation is carried out until the lower surface 62D of the head portion 62B of the seat plate pressing member 62 contacts the upper surface 13A, which is the horizontal or substantially horizontal surface of the seat plate main portion 13 of the seat plate 4, or until it faces the upper surface 13A with a slight gap therebetween. When this operation is performed, the upper part of the shaft portion 62A of each seat plate pressing member 62 is located at a position where it contacts the side surfaces 13B and 13C on both sides in the thickness direction of the shutter curtain 2 in the seat plate main portion 13, or at a position where it faces the side surfaces 13B and 13C with a slight gap therebetween.

[0093] Therefore, in this embodiment, when the seat plate 4 that has reached the fully closed position is bent and deformed indoors or outdoors in the thickness direction of the shutter curtain 2 due to the wind pressure of strong winds during a typhoon, the side surfaces 13B and 13C of these seat plate main portions 13 abut against the upper part of the shaft portion 62A of each seat plate pressing member 62, which is in contact with or faces the side surfaces 13B and 13C of the seat plate main portion 13 with a slight gap, thereby preventing this. Also, at this time, the seat plate 4 rising from the floor surface 10A is also prevented by the upper surface 13A of the seat plate main portion 13 abutting against the lower surface 62D of the head portion 62B of the seat plate pressing member 62. As a result, the shutter curtain 2 can be prevented from moving in the opening direction.

[0094] Also, when it becomes unnecessary to prevent the seat plate 4 from being bent and deformed in the thickness direction of the shutter curtain 2 due to the passage of a typhoon or the like, each seat plate pressing member 62 is removed from the cylindrical member 61, and as shown in FIG. 10, the shutter curtain 2 is made movable in the vertical direction for opening and closing, and the entire length direction of each seat plate pressing member 62 is inserted into the inside of the cylindrical member 61. As a result, the seat plate pressing member 62 can be directly used as a plugging member for closing the inside of the cylindrical member 61, and the seat plate pressing member 62 can be made to serve multiple purposes.

[0095] Also, in this embodiment, when the inside of the cylindrical member 61 is blocked by the seat plate pressing member 62, the height position of the upper surface of the head portion 62B, which is the top of the seat plate pressing member 62, coincides with or is substantially the same as the height position of the floor surface 10A, which is the upper surface of the floor member 10. Further, since the groove 63 serving as the operation portion 62C described above is formed on the upper surface of the head portion 62B, the work for taking out the seat plate pressing member 62, which is a blocking member for blocking the inside of the cylindrical member 61, from the inside of the cylindrical member 61 can be easily and quickly performed by engaging a tool such as an electric driver with the groove 63.

[0096] In this embodiment, instead of making the operation portion 62C the groove 63, the operation portion 62C may be the knob member 31 shown in FIG. 4 that can rotate the seat plate pressing member 62.

[0097] The seat plate retainer 70 of the embodiment shown in FIG. 11 uses the cylindrical member 61 and the seat plate pressing member 62 used in the embodiment of FIG. 9. However, the positions where the two cylindrical members 61 are embedded inside the floor member 10 are on both sides in the thickness direction of the shutter curtain 2 and within the range of the lower surface of the seat plate main portion 13 of the seat plate 4 when the fully closed position is reached. For this reason, the two seat plate pressing members 62 whose lower parts are inserted into the inside of the respective cylindrical members 61 and thus the lower parts are inserted into the inside of the floor member 10 are arranged to penetrate the seat plate main portion 13 of the seat plate 4 vertically when the fully closed position is reached. In order to penetrate the seat plate pressing member 62 through the seat plate main portion 13 of the seat plate 4 when the fully closed position is reached in this way, at two locations in the thickness direction of the shutter curtain 2 on the seat plate main portion 13, two pipe members 71 are arranged with their axial directions in the vertical direction, and the height positions of the upper and lower surfaces of these pipe members 71 coincide with or are substantially the same as the height positions of the upper and lower surfaces of the seat plate main portion 13.

[0098] When the seat plate 4 has reached the fully closed position, the shaft portions 62A of the respective seat plate pressing members 62 are inserted into the inside of the pipe member 71 from above, and the lower portions of these shaft portions 62A are screwed into the small-diameter portion 61C which is the female screw portion of the cylindrical member 61 embedded inside the floor member 10.

[0099] Thereby, similar to the embodiment of FIG. 9, it is possible to prevent the seat plate 4 from being bent and deformed in the thickness direction of the shutter curtain 2 by the upper portions of the shaft portions 62A of the two seat plate pressing members 62. Further, by bringing the lower surface of the head portion 62B of the seat plate pressing member 62 into contact with the upper surface which is the horizontal or substantially horizontal surface of the seat plate main body 13, or facing the upper surface with a slight gap therebetween, similar to the embodiment of FIG. 9, it is possible to prevent the seat plate 4 from rising from the floor surface 10A.

[0100] When it becomes unnecessary to prevent the seat plate 4 from being bent and deformed in the thickness direction of the shutter curtain 2 due to the passage of a typhoon or the like, each seat plate pressing member 62 is removed from the cylindrical member 61 and also removed from the pipe member 71. As shown in FIG. 12, the shutter curtain 2 is made movable in the vertical direction for opening and closing, and the entire length direction of each seat plate pressing member 62 is inserted into the inside of the cylindrical member 61. Further, as shown in FIG. 12, by press-fitting the shaft portion 72B of the closing member 72 with the lid portion 72A formed of a hard synthetic resin or the like into the upper end portion and the lower end portion of each pipe member 71, an operation is performed to close the upper end portion and the lower end portion of each of these pipe members 71 with the closing member 72.

[0101] When the entire length direction of each seat plate pressing member 62 is inserted into the cylindrical member 61, the height position of the upper surface of the head 62B of the seat plate pressing member 62 coincides with or is substantially the same as the height position of the floor surface 10A which is the upper surface of the floor member 10. Further, since the groove 63 which serves as the operation portion 62C described above is formed on the upper surface of the head 62B which is the top portion of the seat plate pressing member 62, the work for taking out the seat plate pressing member 62 which serves as a closing member for closing the inside of the cylindrical member 61 from the inside of the cylindrical member 61 can be easily and quickly performed by engaging a tool such as an electric driver with the groove 63.

[0102] In this embodiment as well, instead of making the operation portion 62C a groove 63, the operation portion 62C may be the knob member 31 shown in FIG. 4 which can rotate the seat plate pressing member 62.

[0103] The seat plate retainer 80 shown in FIG. 13 is applied to a seat plate 43 configured to include a seat plate main body 41 and a lifting body 42 disposed below the seat plate main body 41 so as to be vertically movable relative to the seat plate main body 41, in the same manner as the embodiments of FIGS. 7 and 8. The seat plate retainer 80 of this embodiment is composed of two cylindrical members 81 embedded in the floor member 10 and two seat plate pressing members 82 whose lower portions are inserted into the inside of these cylindrical members 81 when the seat plate 43 has reached the fully closed position. The positions where the two cylindrical members 81 are embedded in the floor member 10 are on both sides in the thickness direction of the shutter curtain 2 and within the range of the lower surface of the lifting body 42 of the seat plate 43 that has reached the fully closed position. The two seat plate pressing members 82 whose lower portions are inserted into the inside of the respective cylindrical members 81 and thus have their lower portions inserted into the floor member 10 are arranged to penetrate both the seat plate main body 41 and the lifting body 42 of the seat plate 43 that has reached the fully closed position vertically.

[0104] Therefore, in order to pass two seat plate pressing members 82 through both the seat plate main body 41 of the seat plate 43 that has reached the fully closed position and the lifting body 42 in the vertical direction, at two positions in the thickness direction of the shutter curtain 2 in the seat plate main body 41, two pipe members 84 are arranged with their axial directions in the vertical direction. At two positions in the thickness direction of the shutter curtain 2 in the lifting body 42, corresponding to the arrangement positions of the two pipe members 84, two pipe members 85 are arranged with their axial directions in the vertical direction. The height positions of the upper and lower surfaces of the pipe member 84 provided on the seat plate main body 41 coincide with or are substantially the same as the height positions of the upper and lower surfaces of the seat plate main body 41, and the height positions of the upper and lower surfaces of the pipe member 85 provided on the lifting body 42 coincide with or are substantially the same as the height positions of the upper and lower surfaces of the lifting body 42.

[0105] Each cylindrical member 81 is composed of a bottom portion 81A, an upper large-diameter portion 81B, and a small-diameter portion 81C provided below the large-diameter portion 81B and serving as an internal thread portion, similar to the cylindrical members 27, 37, and 61 in the previous embodiments. The seat plate pressing member 82 is an elongated bolt with a head 82B provided at the tip of a shaft portion 82A serving as an external thread portion, and the head 82B is circular in plan view. On the upper surface of the head 82B, which is the top of this bolt, an operation portion 82C for rotating the seat plate pressing member 82 is formed as a groove 83 into which a tool such as an electric driver for rotating the seat plate pressing member 62 can be engaged.

[0106] The size inside the large-diameter portion 81B of the cylindrical member 81 corresponds to the size of the head 82B of the seat plate pressing member 82, and the total length in the vertical direction inside the cylindrical member 81 is the same as or larger than the total length in the vertical direction of the seat plate pressing member 82.

[0107] In this embodiment, as shown in FIG. 13, when the seat plate 43 has reached the fully closed position, the shaft portion 82A, which is the male screw portion of the seat plate pressing member 82, is inserted into the pipe member 84 from above, and also inserted into the pipe member 85. Then, the lower part of the shaft portion 82A of the seat plate pressing member 82 is screwed into the small-diameter portion 81C, which is the female screw portion of the cylindrical member 81. The lowering operation of the seat plate pressing member 82 performed by this screwing and rotation operation is carried out until the lower surface of the head portion 82B of the seat plate pressing member 82 contacts the upper surface, which is the horizontal or substantially horizontal surface of the seat plate body 41, as shown in FIG. 13, or until it faces the upper surface with a slight gap therebetween.

[0108] Therefore, the seat plate pressing member 82 in this embodiment has a vertical length extending to the seat plate body 41 when the seat plate 43 has reached the fully closed position.

[0109] And in this embodiment, when the seat plate body 41 of the seat plate 43 that has reached the fully closed position and the lifting body 42 are bent and deformed toward the indoor side or the outdoor side in the thickness direction of the shutter curtain 2 due to the wind pressure of strong winds during a typhoon, it is prevented by the portion inserted into the pipe member 84 and the pipe member 85 among the entire vertical length of the seat plate pressing member 82. Also, at this time, the floating up of the seat plate body 41 is also prevented by the upper surface of the seat plate body 41 coming into contact with the lower surface of the head portion 82B of the seat plate pressing member 82.

[0110] Also, when it becomes unnecessary to prevent the seat plate body 41 of the seat plate 43 and the lifting body 42 from being bent and deformed in the thickness direction of the shutter curtain 2 due to the passage of a typhoon or the like, each seat plate pressing member 82 is removed from the cylindrical member 81, and further removed from the pipe member 84 and the pipe member 85. As shown in FIG. 14, the shutter curtain 2 is made movable in the vertical direction for opening and closing, and the entire length direction of each seat plate pressing member 82 is inserted into the cylindrical member 81. Thereby, the seat plate pressing member 82 can be used as it is as a plugging member for closing the inside of the cylindrical member 81, and the seat plate pressing member 82 can be made to serve multiple purposes.

[0111] Also, in this embodiment, when the inside of the cylindrical member 81 is blocked by the seat plate pressing member 82, the height position of the upper surface of the head portion 82B, which is the top of the seat plate pressing member 82, coincides with or is substantially the same as the height position of the floor surface 10A, which is the upper surface of the floor member 10. Further, since the groove 83 serving as the operation portion 82C described above is formed on the upper surface of this head portion 82B, the work for taking out the seat plate pressing member 82, which is a blocking member for blocking the inside of the cylindrical member 81, from the inside of the cylindrical member 81 can be easily and quickly performed by engaging a tool such as an electric driver with the groove 83.

[0112] In this embodiment, instead of making the operation portion 82C the groove 83, the operation portion 82C may be the gripping member 31 in FIG. 4 that can rotate the seat plate pressing member 82.

[0113] Also, in this embodiment, as shown in FIG. 14, the shaft portions 89B of the blocking members 89 with lid portions 89A formed of a hard synthetic resin or the like are press-fitted into the upper and lower end portions of the pipe member 84 from which the seat plate pressing member 82 has been removed and the upper and lower end portions of the pipe member 85, and the upper and lower end portions thereof are blocked by the blocking members 89.

[0114] The seat plate retainer 90 shown in Fig. 15 is also applied to the seat plate 43 configured to include a seat plate body 41 and a lifting body 42 disposed below the seat plate body 41 and vertically movable relative to the seat plate body 41, similar to the seat plate retainer 80 shown in Fig. 13. This seat plate retainer 90 is composed of two cylindrical members 91 embedded inside the floor member 10 and two seat plate pressing members 92 whose lower parts are inserted into the inside of these cylindrical members 91 when the seat plate 43 reaches the fully closed position. The positions where the two cylindrical members 91 are embedded inside the floor member 10 are on both sides in the thickness direction of the shutter curtain 2 and within the range of the lower surface of the lifting body 42 of the seat plate 43 when it reaches the fully closed position. The two seat plate pressing members 92 whose lower parts are inserted into the inside of the floor member 10 by being inserted into the inside of their respective cylindrical members 91 are arranged to penetrate the lifting body 42 vertically in the seat plate 4 that has reached the fully closed position.

[0115] Therefore, in this embodiment, in order to allow the two seat plate pressing members 82 to penetrate the lifting body 42 of the seat plate 43 vertically when it reaches the fully closed position, at two positions in the thickness direction of the shutter curtain 2 on the lifting body 42, the two pipe members 85 also used in the embodiment of Fig. 13 are arranged with their axial directions in the vertical direction, and the height positions of the upper and lower surfaces of these pipe members 85 coincide or are substantially coincident with the height positions of the upper and lower surfaces of the lifting body 42.

[0116] Each cylindrical member 91, similar to the cylindrical members 27, 37, 61, 81 in the previous embodiments, consists of a bottom part 91A, an upper large-diameter part 91B, and a small-diameter part 91C provided below the large-diameter part 91B and serving as an internal thread part. Also, the seat plate pressing member 92 is a bolt with a head 92B provided at the tip of a shaft part 92A serving as an external thread part, and the head 92B is circular in plan view. On the upper surface of the head 92B serving as the top of this bolt, an operation part 82C for rotating the seat plate pressing member 92 is formed as a groove 93 into which a tool such as an electric driver for rotating the seat plate pressing member 92 can be engaged.

[0117] The inner size of the large-diameter portion 91B of the cylindrical member 91 corresponds to the size of the head portion 92B of the seat plate pressing member 92, and the total length in the vertical direction inside the cylindrical member 91 is the same as or greater than the total length in the vertical direction of the seat plate pressing member 92.

[0118] In this embodiment, since the dimensions in the thickness direction of the shutter curtain 2 for the seat plate body 41 and the lifting body 42 of the seat plate 43 are the same or substantially the same, two holes 41F for communicating the internal space of the seat plate body 41 with the external space below the seat plate body 41 are formed at positions corresponding to the arrangement positions of the two pipe members 85 in the lifting body 42 on the lower surface of the seat plate body 41. When the seat plate 43 is at a position above the fully closed position and the vertical interval between the seat plate body 41 and the lifting body 42 is increased, as shown in FIG. 16, after once inserting the upper portion of the seat plate pressing member 92 in an inclined posture with respect to the vertical direction into the inside of these holes 41F, as can be seen from FIG. 15, the shaft portion 92A that is the male screw portion of the seat plate pressing member 92 returned to the vertical posture is inserted into the inside of the pipe member 85 from above. After lowering the shutter curtain 2 to the fully closed position, the lower portion of the shaft portion 92A of the seat plate pressing member 92 is screwed into the small-diameter portion 91C that is the female screw portion of the cylindrical member 91. Then, the lowering operation of the seat plate pressing member 92 performed by this screwing and rotation operation is carried out until the lower surface of the head portion 92B of the seat plate pressing member 92 contacts the upper surface that is the horizontal or substantially horizontal surface of the lifting body 42, or until it faces the upper surface with a slight gap.

[0119] Therefore, the seat plate pressing member 92 in this embodiment has a vertical length that extends to the lifting body 42 when the seat plate 43 has reached the fully closed position but does not extend to the seat plate body 41.

[0120] In this embodiment, the lifting body 42 of the seat plate 43 that has reached the fully closed position is prevented from being bent and deformed in the indoor or outdoor direction, which is the thickness direction of the shutter curtain 2, by the wind pressure caused by the strong wind of a typhoon, by the upper part of the entire vertical length of the seat plate pressing member 92 that is inserted into the pipe member 85. Further, at this time, the lifting body 42 being lifted is prevented by the upper surface of the lifting body 42 coming into contact with the lower surface of the head 92B of the seat plate pressing member 92.

[0121] Also, when it becomes unnecessary to prevent the lifting body 42 of the seat plate 43 from being bent and deformed in the thickness direction of the shutter curtain 2 due to the passage of a typhoon or the like, after slightly raising the seat plate main body 41 of the seat plate 43 by raising the shutter curtain 2, each seat plate pressing member 92 is removed from the cylindrical member 91 and further removed from the pipe member 85. As shown in FIG. 16, the shutter curtain 2 is made movable in the vertical direction for opening and closing, and the entire length in the longitudinal direction of each seat plate pressing member 92 is inserted into the inside of the cylindrical member 91. Thereby, the seat plate pressing member 92 can be used as it is as a plugging member for closing the inside of the cylindrical member 91, and the seat plate pressing member 92 can be made to serve multiple purposes.

[0122] Also, in this embodiment as well, when the inside of the cylindrical member 91 is closed by the seat plate pressing member 92, the height position of the upper surface of the head 92B, which is the top of the seat plate pressing member 92, coincides with or is substantially the same as the height position of the floor surface 10A, which is the upper surface of the floor member 10. Further, since the groove 93, which serves as the operation portion 92C described above, is formed on the upper surface of the head 92B, the work of removing the seat plate pressing member 92, which serves as a plugging member for closing the inside of the cylindrical member 91, from the inside of the cylindrical member 91 can be easily and quickly performed by engaging a tool such as an electric driver with the groove 93.

[0123] Note that, also in this embodiment, instead of making the operation portion 92C the groove 93, the operation portion 92C may be the knob member 31 in FIG. 4 that can rotate the seat plate pressing member 92.

[0124] Also, in this embodiment, as shown in FIG. 16, at both the upper and lower ends of the pipe member 85 from which the seat plate pressing member 92 has been removed, the shaft portion 89B of the closing member 89 with a lid portion 89A formed of a hard synthetic resin or the like, which is also shown in the embodiment of FIG. 14, is press-fitted, and both the upper and lower ends thereof are closed by the closing member 89.

[0125] According to this embodiment, an advantage is obtained in that the vertical length dimensions of the cylindrical member 91 and the seat plate pressing member 92 can be made shorter than those of the cylindrical member 81 and the seat plate pressing member 82 used in the embodiment of FIG. 13.

[0126] In this embodiment, since the thickness dimensions of the shutter curtain 2 for the seat plate main body 41 and the lifting body 42 of the seat plate 43 are the same or substantially the same, the hole 41F described above is provided on the lower surface of the seat plate main body 41. However, when the thickness dimension of the shutter curtain 2 for the lifting body 42 is larger than the thickness dimension of the shutter curtain 2 for the seat plate main body 41, the hole 41F does not have to be provided on the lower surface of the seat plate main body 41.

[0127] The seat plate retainer 100 shown in FIG. 17 is also applied to the seat plate 43 configured to include a seat plate main body 41 and a lifting body 42 disposed below the seat plate main body 41 and vertically movable relative to the seat plate main body 41, in the same manner as the seat plate retainers 40, 80, and 90 shown in FIGS. 7, 13, and 15. This seat plate retainer 100 is composed of two cylindrical members 101 embedded inside the floor member 10 and two seat plate pressing members 102 whose lower portions are inserted into the inside of these cylindrical members 101 when the seat plate 43 reaches the fully closed position. The positions where the two cylindrical members 101 are embedded inside the floor member 10 are on both sides in the thickness direction of the shutter curtain 2, and are positions shifted in the thickness direction of the shutter curtain 2 from the seat plate main body 41 and the lifting body 42 of the seat plate 43 that has reached the fully closed position. When the lower portions of the respective seat plate pressing members 102, which are solid or hollow rod-shaped members circular in plan view, are inserted into the inside of the cylindrical members 101, the lower portions of these seat plate pressing members 102 are inserted into the inside of the floor member 10.

[0128] As shown in FIG. 17, each cylindrical member 101, similar to the cylindrical members 27, 37, 61, 81, 91 of the previous embodiments, includes a bottom portion 101A, an upper large-diameter portion 101B, and a small-diameter portion 101C provided below the large-diameter portion 101B. However, this small-diameter portion 101C does not form a female screw portion. When the seat plate 43 reaches the fully closed position, the lower portions of the respective seat plate pressing members 102 are inserted into the inside of the small-diameter portion 101C of the cylindrical member 101. As a result, these seat plate pressing members 102, which have a longer length in the vertical direction than the cylindrical member 101, will stand on their own with the lower portions inserted into the inside of the floor member 10. Also, at this time, the seat plate pressing member 102 is in contact with or faces the seat plate main body 41 of the seat plate 43 and the elevating body 42 with a slight gap in the thickness direction of the shutter curtain 2. Further, the upper end of the seat plate pressing member 102 reaches the same height position as the upper surface 41G of the seat plate main body 41 or a height position exceeding this upper surface 41G.

[0129] Therefore, the seat plate main body 41 of the seat plate 43 and the elevating body 42, which have reached the fully closed position, being bent and deformed toward the indoor side or the outdoor side in the thickness direction of the shutter curtain 2 due to the wind pressure of strong winds during a typhoon, will be prevented by the upper portion of the seat plate pressing member 102 excluding the lower portion inserted into the small-diameter portion 101C of the cylindrical member 101 among the entire length in the vertical direction of the seat plate pressing member 102.

[0130] Also, when it becomes unnecessary to prevent the seat plate body 41 of the seat plate 43 and the lifting body 42 from bending and deforming in the thickness direction of the shutter curtain 2 due to the passage of a typhoon or the like, as shown in FIG. 18, each seat plate pressing member 102 is removed from the inside of the cylindrical member 101, and the inside of each cylindrical member 101 from which the seat plate pressing member 102 has been removed is closed by a closing member 103. This closing member 103 is, for example, formed of a hard synthetic resin or the like, similar to the closing member 30 in FIG. 4, and has a head portion 103A provided with a shaft portion 103B. When the shaft portion 103B is press-fitted into the small-diameter portion 101C of the cylindrical member 101, the inside of the cylindrical member 101 is closed by the closing member 103. Thereby, it is possible to prevent mud, dust, etc. from entering and accumulating inside the cylindrical member 101 by the closing member 103.

[0131] Also, when the inside of the cylindrical member 101 is closed by the closing member 103, the height position of the upper surface of the head portion 103A, which is the upper surface of the closing member 103, coincides with or is substantially the same as the height position of the floor surface 10A, which is the upper surface of the floor member 10. For this reason, the head portion 103A does not protrude or hardly protrudes from the floor surface 10A, and since this floor surface 10A is in the same state or substantially the same state as the original floor surface, people passing through the above-described entrance / exit with the floor surface 10A as the lower surface can pass through as usual without particularly paying attention to the closing member 30.

[0132] Also, as shown in FIG. 18, the head portion 103A, which is the top portion of the closing member 103, is provided with an operation portion 103C used when removing the closing member 103 from the inside of the cylindrical member 101. This operation portion 103C is, similar to the operation portion 30C in FIG. 4, a knob member 104 provided with rotation center shaft portions inserted into holes formed at two opposite positions in the head portion 103A, which is circular in plan view, at both ends of a semi-circular main body formed of a hard metal wire. After standing up the knob member 104, which is tiltable with respect to the head portion 103A about these rotation center shaft portions, as shown by the two-dot chain line in FIG. 18, by pinching this knob member 104, the closing member 103 can be removed from the inside of the cylindrical member 101.

[0133] Therefore, even when the inside of the two cylindrical members 101 shown in FIG. 18 is blocked by the blocking member 103 during normal times when a typhoon has not arrived, when a typhoon arrives, the operation of removing the blocking member 103 from the inside of the cylindrical member 101 can be easily and quickly performed by using the gripping member 104.

[0134] Note that the seat plate presser 100 of this embodiment shown in FIG. 17 can also be applied to the seat plate 4 shown in FIG. 3 and the like.

[0135] The seat plate presser 110 shown in FIG. 19 is also applied to the seat plate 43 including a seat plate body 41 and a lifting body 42 disposed below the seat plate body 41 so as to be vertically movable with respect to the seat plate body 41, similar to the seat plate pressers 40, 80, 90, 100 shown in FIGS. 7, 13, 15, and 17. This seat plate presser 110 is composed of two cylindrical members 111 embedded in the floor member 10 and two seat plate pressing members 112 whose lower parts are inserted into the inside of these cylindrical members 111 when the seat plate 43 reaches the fully closed position. The positions where the two cylindrical members 111 are embedded in the floor member 10 are at both sides in the thickness direction of the shutter curtain 2, and are positions shifted in the thickness direction of the shutter curtain 2 from both the seat plate body 41 and the lifting body 42 of the seat plate 43 when it reaches the fully closed position. By inserting the lower parts of the respective seat plate pressing members 112 into the inside of the cylindrical members 111, the lower parts of these seat plate pressing members 112 are inserted into the inside of the floor member 10.

[0136] The vertical length dimension inside the cylindrical member 111 is the same as or approximately the same as the vertical length dimension of the seat plate pressing member 112. FIG. 20 shows a perspective view of these cylindrical member 111 and seat plate pressing member 112. As shown in this FIG. 20, the cylindrical member 111 has the same outer diameter dimension continuously over the entire vertical length and has a bottom portion 111A. A wall portion 111C that protrudes into the inside of the cylindrical member 111 is provided below the opening 111B at the upper end. The upper end of this wall portion 111C is a stepped portion 111D, and the inside of the wall portion 111C is also an opening 111B having a vertical dimension and a circular hole portion 111E with a small diameter in plan view. The vertical dimension of this hole portion 111E from the stepped portion 111D to the bottom portion 111A is large. Further, two groove portions 111F having a vertical direction from the stepped portion 111D to the bottom portion 111A as the length direction are formed at two locations on the wall portion 111C that are opposite to each other in plan view.

[0137] The seat plate pressing member 112 is composed of a main body 112A that is a solid or hollow rod-shaped portion that is circular in plan view and has a diameter corresponding to the hole portion 111E of the cylindrical member 111, and a circular head portion 112B provided at the upper end portion of this main body 112A. The diameter dimension and vertical dimension of the head portion 112B that is the top portion of this seat plate pressing member 112 correspond to the diameter dimension and vertical dimension of the opening 111B at the upper end of the cylindrical member 111. Further, a protrusion 112D that protrudes in the outer diameter direction of the main body 112A is formed at a location slightly above the lower surface 112C of the main body 112A, and this protrusion 112D is provided at two locations on opposite sides of each other in plan view.

[0138] Among the seat plate pressing members 112, an operation portion 112E is formed on the head portion 112B. This operation portion 112E is a finger hook portion 113 that protrudes horizontally toward a quadrangular hole portion 112F formed with depth on the upper surface of the head portion 112B in a plan view. Since the vertical thickness dimension of this finger hook portion 113 is smaller than the depth of the hole portion 112F having a horizontal width dimension reaching below the finger hook portion 113, when the entire seat plate pressing member 112 is inserted into the inside of the cylindrical member 111 and thus the entire head portion 112B of the seat plate pressing member 112 is inserted into the inside of the opening portion 111B of the cylindrical member 111, the seat plate pressing member 112 can be taken out from the inside of the cylindrical member 111 by hanging a finger inserted from the hole portion 112F on the lower surface of the finger hook portion 113.

[0139] As shown in FIG. 19, when the seat plate 43 reaches the fully closed position, the lower portion of the main body 112A of each seat plate pressing member 112 is inserted from the opening portion 111B of the cylindrical member 111 into the hole portion 111E. This insertion is performed by shifting each protrusion 112D provided on the seat plate pressing member 112 from the groove portion 111F of the cylindrical member 111. Therefore, each protrusion 112D is placed on the stepped portion 111D of the cylindrical member 111. Thereby, each seat plate pressing member 112 becomes self - standing with the lower portion of the main body 112A inserted into the hole portion 111E of the cylindrical member 111.

[0140] Also, at this time, the lower surface of the head portion 112B of the seat plate pressing member 112 reaches the same height position as the upper surface of the seat plate main body 41 of the seat plate 43 or a higher position exceeding this upper surface. For this reason, the seat plate pressing member 112 of this embodiment has a vertical length extending to the seat plate main body 41 when the seat plate 43 reaches the fully closed position. Also, at this time, as shown in FIG. 19, the main body 112A of the seat plate pressing member 112 is in contact with or faces with a slight gap in the thickness direction of the shutter curtain 2 with respect to both the seat plate main body 41 and the lifting body 42.

[0141] Therefore, the seat plate body 41 of the seat plate 43 and the lifting body 42 that have reached the fully closed position are prevented from being bent and deformed in the indoor or outdoor direction, which is the thickness direction of the shutter curtain 2, by the wind pressure caused by the strong wind of a typhoon. This is achieved by the upper part of the main body 112A of the seat plate pressing member 112, excluding the lower part inserted into the hole 111E of the cylindrical member 111, within the entire vertical length of the main body 112A of the seat plate pressing member 112.

[0142] Also, when it becomes unnecessary to prevent the seat plate body 41 of the seat plate 43 and the lifting body 42 from being bent and deformed in the thickness direction of the shutter curtain 2 due to the passage of a typhoon or the like, each seat plate pressing member 112 is taken out from inside the cylindrical member 111. Then, as can be seen from FIG. 21, by rotating the removed seat plate pressing member 112 about the vertical axis, the position of the protrusion 112D of the seat plate pressing member 112 is aligned with the position of the groove 111F of the cylindrical member 111. Next, while inserting the protrusion 112D into the groove 111F, an operation is performed to insert the seat plate pressing member 112 into each cylindrical member 111 from which the seat plate pressing member 112 has been removed. By this operation, the inside of the cylindrical member 111 is blocked by the entire seat plate pressing member 112. As a result, the seat plate pressing member 112, with its entire vertical direction inserted into the inside of the cylindrical member 111, can be used as a blocking member for blocking the inside of the cylindrical member 111 as it is, enabling the seat plate pressing member 112 to be made to serve multiple purposes.

[0143] Also in this embodiment, when the inside of the cylindrical member 111 is blocked by the seat plate pressing member 112, the height position of the upper surface of the head 112B, which is the top of the seat plate pressing member 112, coincides with or is substantially the same as the height position of the floor surface 10A, which is the upper surface of the floor member 10. Furthermore, since the finger hook portion 113, which serves as the operation portion 112E described above, is provided on the upper surface of this head 112B, the operation for taking out the seat plate pressing member 112, which serves as a blocking member for blocking the inside of the cylindrical member 111, from inside the cylindrical member 111 can be easily and quickly performed by the finger hook portion 113, which is the operation portion 112E.

[0144] In this embodiment as well, instead of using the operation unit 112E as the finger-hooking part 113, the operation unit 112E may be used as the gripping member 31 in FIG. 4.

[0145] Also, the operation unit 103C in FIG. 18 may be used as the finger-hooking part 113.

[0146] Further, in this embodiment, by setting the vertical length dimension of the seat plate pressing member to a dimension that extends to the lifting body 42 when the seat plate 43 has reached the fully closed position and does not extend to the seat plate body 41, among the seat plate 43, it is possible to prevent the lifting body 42 from being bent and deformed in the indoor or outdoor direction, which is the thickness direction of the shutter curtain 2, due to the wind pressure caused by strong winds during a typhoon. This embodiment can also be applied to such cases.

[0147] Furthermore, this embodiment can also be applied to the seat plate 4 shown in FIG. 3.

[0148] Furthermore, the cylindrical members 27, 37, 61, 81, 91, 101, 111 in each of the embodiments described so far have had bottoms 27A, 37A, 61A, 81A, 91A, 101A, 111A. However, in order to prevent water such as rainwater from accumulating inside these cylindrical members, the cylindrical members in each of the embodiments may be cylindrical members without bottoms, or may be cylindrical members having bottoms with drain holes.

Industrial Applicability

[0149] The present invention can be used, for example, to prevent the seat plate of a shutter device for an entrance / exit installed in a building or the like from being bent and deformed in the thickness direction of the shutter curtain.

Explanation of Reference Numerals

[0150] 1 Guide rail 2 Shutter curtain 4, 43 Seat plate 13 Seat plate main part 13A Upper surface of the seat plate main part, which is the horizontal or substantially horizontal surface of the seat plate Floor member which is a fully closed seat plate contact member Floor surface of the floor member which is the upper surface of the fully closed seat plate contact member 20, 20’, 40, 60, 70, 80, 90, 100 Seat plate retainers 21, 22, 51, 52 Bridging members 21A, 22A, 51A, 52A End portions on the seat plate side in the bridging members 21B, 22B, 51B, 52B End portions on the floor member side which are the end portions on the fully closed seat plate contact member side in the bridging members 27, 37 Cylindrical members which are also connecting members 28, 38 Couplings 30, 103 Closing members 30A, 103A Heads which are the top portions 30C, 103C Operating portions 41 Seat plate body 42 Lifting body 61, 81, 91, 101, 111 Cylindrical members 62, 82, 92, 102, 112 Seat plate pressing members 62B, 82B, 92B, 112B Heads which are the top portions 62C, 82C, 92C, 112E Operating portions 62D Lower surface

Claims

1. A seat plate holder for preventing the seat plate 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 in the vertical direction guided by these guide rails and has a seat plate at the end on the closing side from being bent and deformed in the thickness direction of the shutter curtain, The shutter curtain is configured to include a seat plate pressing member, the lower part of which is inserted into the fully closed seat plate abutment member with which the seat plate abuts when the fully closed position is reached, and the upper part of the seat plate pressing member, which is arranged on at least one of both sides in the thickness direction of the shutter curtain, prevents the seat plate from bending and deforming in the thickness direction of the shutter curtain when the fully closed position is reached, The seat plate pressing member is disposed at a position shifted in the thickness direction of the shutter curtain from the seat plate when the fully closed position is reached, and the upper portion of the seat plate pressing member is abutted against the side surface of the seat plate in the thickness direction of the shutter curtain to prevent bending deformation of the seat plate in the thickness direction of the shutter curtain, A cylindrical member for inserting the lower part of the seat plate pressing member into the fully closed seat plate abutment member is embedded in the inside of the fully closed seat plate abutment member, and the inside of the cylindrical member when the lower part of the seat plate pressing member is not inserted is blocked by a blocking member, A seat plate retainer for a shutter device, wherein the blocking member is the seat plate retainer member whose entirety is inserted inside the cylindrical member.

2. A seat plate holder for preventing the seat plate 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 in the vertical direction guided by these guide rails and has a seat plate at the end on the closing side from being bent and deformed in the thickness direction of the shutter curtain, The shutter curtain is configured to include a seat plate pressing member, the lower part of which is inserted into the fully closed seat plate abutment member with which the seat plate abuts when the fully closed position is reached, and the upper part of the seat plate pressing member, which is arranged on at least one of both sides in the thickness direction of the shutter curtain, prevents the seat plate from bending and deforming in the thickness direction of the shutter curtain when the fully closed position is reached, The seat plate pressing member is disposed at a position that passes through the seat plate in the vertical direction when the seat plate reaches the fully closed position, A seat plate retainer for a shutter device, characterized in that a pipe member into which the seat plate retainer member is inserted is disposed inside the seat plate.

3. 3. The seat plate holder of a shutter device as described in claim 2, further comprising a member with a lid for covering the upper and lower ends of the pipe member when the seat plate holder is not inserted inside.

4. 4. The seat plate holder of a shutter device according to claim 1, wherein the seat plate holder members are arranged on both sides in the thickness direction of the shutter curtain.

5. A seat plate holder for a shutter device as described in any one of claims 1 to 4, characterized in that the seat plate holder member is a member with a head, and the underside of the head is capable of abutting from above against a horizontal or approximately horizontal surface provided on the seat plate.

6. A seat plate holder for a shutter device as described in claim 2 or 3, characterized in that a tubular member for inserting the lower part of the seat plate holder member into the interior of the fully closed seat plate abutment member is embedded, and the interior of the tubular member when the lower part of the seat plate holder member is not inserted is blocked by a blocking member.

7. 7. The seat plate holder of the shutter device according to claim 6, wherein the blocking member is the seat plate holder whose entirety is inserted into the inside of the cylindrical member.

8. A seat plate holder for a shutter device as described in any one of claims 1, 6 and 7, characterized in that the blocking member is a bolt having a shaft portion which is a male threaded portion, and the tubular member is provided with a female threaded portion into which the male threaded portion is screwed.

9. A seat plate holder for a shutter device as described in claim 1 or 7, characterized in that the seat plate holder member is formed with a protrusion protruding in the outer diameter direction, the tubular member is provided with a wall portion protruding into the inside of the tubular member, and a groove portion is formed in the wall portion in the vertical direction that does not coincide with the position of the protrusion or coincides with the position of the protrusion depending on the angle at which the seat plate holder member is rotated around a vertical axis.

10. A seat plate holder for a shutter device as described in any one of claims 1 and 6 to 9, characterized in that the height position of the upper surface of the blocking member when the interior of the tubular member is blocked coincides or approximately coincides with the height position of the upper surface of the fully closed seat plate abutment member.

11. A seat plate holder for a shutter device as described in any one of claims 1 and 6 to 10, characterized in that the top of the blocking member is provided with an operating portion which is operated to remove the blocking member from the tubular member.

12. 12. The seat plate holder for a shutter device according to claim 11, wherein the operating portion is a knob member which can be raised and lowered.

13. 12. The seat plate holder for a shutter device according to claim 11, wherein the operating portion is a groove for engaging a tool.

14. In the seat plate holder of the shutter device described in claim 11, the operating portion is a finger hook portion protruding horizontally toward a hole formed with a depth on the upper surface of the head portion which is the top portion of the seat plate holder member.

15. A seat plate holder for a shutter device as described in any one of claims 1 to 14, characterized in that the seat plate includes a seat plate main body and a lifting body arranged below the seat plate main body so as to be freely raised and lowered in the vertical direction relative to the seat plate main body, and the seat plate holder member has a vertical length extending to the seat plate main body when the seat plate reaches a fully closed position.

16. A seat plate holder for a shutter device as described in any one of claims 1 to 14, characterized in that the seat plate includes a seat plate main body and a lifting body arranged below the seat plate main body so as to be freely raised and lowered in the vertical direction relative to the seat plate main body, and the seat plate holder member has a vertical length that extends to the lifting body when the seat plate reaches a fully closed position, but does not extend to the seat plate main body.

Images