JP2024052971A - Shutter device seat plate holder - Google Patents

Abstract

[Problem] To provide a seat plate holder for a shutter device that can prevent the seat plate from being deformed by wind pressure during strong winds caused by typhoons. [Solution] In order to prevent the seat plate 4 of a shutter device that includes guide rails arranged on both the left and right sides and a shutter curtain 2 that is guided by these guide rails to move up and down to open and close, with the end on the closing side being the seat plate 4, from being deformed in the thickness direction of the shutter curtain 2, the lower part of a seat plate holder 62 is inserted inside a fully closed seat plate abutment member 10 that the seat plate 4 abuts against when it reaches the fully closed position, and the upper part of the seat plate holder 62 arranged on at least one of both sides in the thickness direction of the shutter curtain 2 prevents the seat plate 4 from being deformed in the thickness direction of the shutter curtain 2 when it reaches the fully closed position. [Selected Figure] Figure 9

Description

The present invention relates to a seat plate retainer that prevents the seat plate of a shutter device installed in a building or the like from bending and deforming in the thickness direction of the shutter curtain, and can be used, for example, in entrance and exit shutter devices.

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

JP 2020-70672 A

In shutter devices installed at building entrances and exits, for example, when the shutter curtain is fully closed, the shutter curtain is subjected to large wind pressure during strong winds caused by a typhoon. For this reason, not only in shutter devices in which the ends of the seat plate in the longitudinal direction, which has a length dimension in the width direction of the shutter curtain (left and right) are not inserted inside the guide rail, but also in shutter devices in which at least a portion of each end of the seat plate in the longitudinal direction is inserted inside the guide rail, the seat plate will bend and deform significantly in the thickness direction of the shutter curtain, causing the seat plate to lift up, which may result in a gap being created between the seat plate and the floor. For this reason, there is a need for measures to prevent such bending deformation from occurring in the seat plate.

The present invention aims to provide a seat plate holder for a shutter device that can prevent the seat plate from bending and deforming due to wind pressure during strong winds caused by typhoons.

The seat plate holder of the shutter device according to the present invention is a seat plate holder for preventing the seat plate of a shutter device, which is composed of guide rails arranged on both the left and right sides and a shutter curtain that is guided by these guide rails to move up and down to open and close, with the closing end being the seat plate, from bending in the thickness direction of the shutter curtain, and is characterized in that it is composed of a bridging member that is bridged between the shutter curtain including the seat plate and a fully closed seat plate abutting member against which the seat plate abuts when the fully closed position is reached, and the bridging member that is arranged on at least one of both sides in the thickness direction of the shutter curtain prevents the seat plate from bending in the thickness direction of the shutter curtain when the fully closed position is reached.

In this way, in the seat plate holder of the shutter device according to the present invention, a bridge member is placed between the shutter curtain including the seat plate and the fully closed seat plate abutment member against which the seat plate abuts when it reaches the fully closed position. This bridge member reinforces the strength of the seat plate when fully closed, and makes it possible to prevent the seat plate from bending and deforming in the thickness direction of the shutter curtain due to wind pressure, etc., during strong winds caused by a typhoon.

The number of such bridge members may be one in the length direction of the seat plate, which is the width direction of the shutter curtain, or may be multiple.

In addition, if the seat plate is deflected on one side of the thickness of the shutter curtain, for example, due to strong winds from a typhoon, the bridging member may be provided only on the side of the thickness of the shutter curtain where the seat plate is deflected. Alternatively, if the seat plate is deflected on both sides of the thickness of the shutter curtain, for example, due to backflowing wind, the bridging member may be provided on both sides of the thickness of the shutter curtain.

As described below, the present invention can be applied to the seat plate of a shutter device for any purpose. When the present invention is applied to the seat plate of an entrance shutter device that opens and closes an entrance with a shutter curtain, the fully closed seat plate abutment member against which the seat plate abuts when it reaches the fully closed position is the floor. 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 abutment member against which the seat plate abuts when it reaches the fully closed position is the lower frame member of the window sash, etc.

In addition, in the present invention, as described above, the bridging member is placed 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 by connecting the end of the bridging member on the fully closed seat plate abutting member side to the fully closed seat plate abutting member. In order to connect the end of the bridging member on the fully closed seat plate abutting member side to the fully closed seat plate abutting member in this manner, the end 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 with a fastener such as a screw or bolt, or a connecting member may be embedded inside the fully closed seat plate abutting member, and the end 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 connecting member connected to the connecting member.

In the latter case, the end of the bridge member facing the fully closed seat plate abutment member is connected to the fully closed seat plate abutment member by a fastener that is connected to a connecting member embedded inside the fully closed seat plate abutment member, making this connection even more reliable.

In this case, when a connecting member is embedded inside the fully closed seat plate abutment member and a coupling member connected to this connecting member couples the end of the bridging member on the fully closed seat plate abutment member side to the fully closed seat plate abutment member, and the connecting member is a cylindrical member and the coupling member is inserted inside this cylindrical member to connect the coupling device, it is preferable to seal the inside of the cylindrical member with a sealing member when the end of the bridging member on the fully closed seat plate abutment member side is not coupled to the fully closed seat plate abutment member by the coupling member.

As a result, when the end of the bridge member facing the fully closed seat plate abutment member is not connected to the fully closed seat plate abutment member by the connecting member, the blocking member can prevent mud, dust, etc. from entering and accumulating inside the cylindrical member.

In addition, when the end of the bridging member on the fully closed seat plate abutment member side is not connected to the fully closed seat plate abutment member by the connecting member, in the case where the inside of the tubular member is closed by a blocking member, the blocking member for blocking the inside of the tubular member may be a dedicated member for only blocking the inside of the tubular member, or may be the above-mentioned connecting device for connecting the end of the bridging member on the fully closed seat plate abutment member side to the fully closed seat plate abutment member.

Of these, the latter allows the interior of the tubular member to be sealed by a fastener for connecting the end of the bridge member on the fully closed seat plate abutment member side to the fully closed seat plate abutment member, making it possible to use the fastener for multiple purposes, thereby reducing the number of parts that make up the seat plate retainer of the shutter device according to the present invention.

In addition, when the end of the bridging member on the fully closed seat plate abutment member side is not connected to the fully closed seat plate abutment member by the connecting member as described above, if the inside of the cylindrical member is blocked by a blocking member, it is preferable that the height position of the upper surface of the blocking member when the inside of the cylindrical member is blocked coincides or approximately coincides with the height position of the upper surface of the fully closed seat plate abutment member.

As a result, when the inside of the cylindrical member is sealed, the upper surface of the sealing member does not protrude or barely protrudes beyond the upper surface of the fully closed seat plate abutment member, so the state of the upper surface of the fully closed seat plate abutment member can be kept in the same state as it was originally.

In addition, when the end of the bridge member on the fully closed seat plate abutment member side is not connected to the fully closed seat plate abutment member by the connecting member and the inside of the tubular member is sealed with a sealing member, it is preferable to provide an operating part at the top of the sealing member that is operated when removing the sealing member from the tubular member.

This makes it easier to remove the blocking member from the tubular member using the operating part located at the top of the blocking member.

The operating part provided at the top of the blocking member in this manner for removing the blocking member from the tubular member may be any part that allows the blocking member to be removed from the tubular member. One example of an operating part is a tool engagement groove provided at the head of the male screw member when the blocking member is a male screw member in order to rotate the male screw member with a tool such as an electric screwdriver. Another example of an operating part is an operating member provided at the top of the blocking member that can be raised or lowered, for example.

The seat plate holder of the shutter device according to the present invention described above can also be applied to shutter devices in which the seat plate is not divided into upper and lower parts. The seat plate holder of the shutter device according to the present invention can also be applied to shutter devices in which the seat plate is divided into upper and lower parts and the seat plate is configured to include a seat plate main body and a lifting body arranged below the seat plate main body so that it can be raised and lowered freely in the vertical direction relative to the seat plate main body in order to detect when the seat plate hits an obstacle during the closing movement of the shutter curtain or when the seat plate has reached the fully closed position.

When the seat plate holder of the shutter device according to the present invention is applied to a seat plate that includes a seat plate body and a lifting body that is arranged below the seat plate body and can be raised and lowered in the vertical direction relative to the seat plate body, it is preferable that the aforementioned bridging member that is bridged between the shutter curtain including the seat plate and the fully closed seat plate abutting member to prevent the seat plate from bending and deforming in the thickness direction of the shutter curtain is bridged between the seat plate body of the seat plate and the fully closed seat plate abutting member, i.e., the end of the bridging member on the seat plate side is connected to the seat plate body.

This makes it possible to more effectively prevent the seat plate from bending and deforming 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 abutment member, i.e., when the end of the bridging member on the seat plate side is connected to the lifting body.

The bridge member in the seat plate holder of the shutter device according to the present invention described above can be made of any material, and this material may be a flat bar, an angle bar, a channel material, or the like. The bridge member may also be made of a long material whose length in the left-right direction is the same as the length direction of the seat plate.

In addition, in the seat plate holder of the shutter device according to the present invention described above, the bridging member can be connected to the shutter curtain including the seat plate even during normal times, and the end of the bridging member facing the fully closed seat plate abutment member can be connected to the fully closed seat plate abutment member when strong winds such as those caused by a typhoon are expected, so that the opening and closing movement of the shutter curtain during normal times can be performed with the bridging member attached to the shutter curtain.

The seat plate holder of the shutter device according to the present invention is a seat plate holder for preventing the seat plate of the shutter device, which is composed of guide rails arranged on both the left and right sides and a shutter curtain that is guided by these guide rails to move up and down to open and close, with the end on the closing side being the seat plate, from bending in the thickness direction of the shutter curtain, and is characterized in that it is composed of a seat plate holder member whose lower part is inserted inside a fully closed seat plate abutment member against which the seat plate abuts when the fully closed position is reached, and the upper part of the seat plate holder member arranged on at least one of both sides in the thickness direction of the shutter curtain prevents the seat plate from bending in the thickness direction of the shutter curtain when the fully closed position is reached.

In the seat plate holder of the shutter device according to this invention, the lower part of the seat plate holder is inserted inside the fully closed seat plate abutment member against which the seat plate abuts when it reaches the fully closed position, and the upper part of this seat plate holder prevents the seat plate from bending and deforming in the thickness direction of the shutter curtain when it reaches the fully closed position.

The number of seat plate retaining members in the seat plate retainer of the shutter device according to this invention may be one or more in the length direction of the seat plate, which is the width direction of the shutter curtain.

In addition, in the seat plate holder of the shutter device according to this invention, if the seat plate is deflected on one side of the thickness of the shutter curtain due to, for example, strong winds from a typhoon, the seat plate holder member may be provided only on the side of the thickness of the shutter curtain where the seat plate is deflected. Alternatively, if the seat plate is deflected on both sides of the thickness of the shutter curtain due to backflow of wind, etc., the seat plate holder member may be provided on both sides of the thickness of the shutter curtain.

The seat plate holder of the shutter device according to the present invention prevents bending deformation of the seat plate in the thickness direction of the shutter curtain by using the seat plate holder member, and can be applied to the seat plate of a shutter device for any purpose. When applied to the seat plate of an entrance shutter device that opens and closes an entrance with a shutter curtain, the fully closed seat plate abutment member against which the seat plate abuts when it reaches the fully closed position is the floor, and when 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 abutment member against which the seat plate abuts when it reaches the fully closed position is the lower frame member of the window sash, etc.

The seat plate retaining member for preventing bending deformation of the seat plate in the thickness direction of the shutter curtain can be positioned at any position relative to the seat plate, so long as it is a position that can prevent bending deformation of the seat plate in the thickness direction of the shutter curtain. One example of such a position is a position that is shifted in the thickness direction of the shutter curtain from the seat plate when it reaches the fully closed position, and another example of such a position is a position that penetrates vertically through the seat plate when it reaches the fully closed position.

Furthermore, the seat plate pressing member may be a member with a head, and the underside of this head may be capable of abutting from above against a horizontal or nearly horizontal surface provided on the seat plate.

As a result, the seat plate retaining member can prevent bending deformation of the seat plate in the thickness direction of the shutter curtain, and the head portion of the seat plate retaining member can also prevent the seat plate from moving in the opening direction from the fully closed position.

In addition, in the seat plate holder of the shutter device according to this invention, the lower part of the seat plate holder, which prevents the seat plate from bending in the thickness direction of the shutter curtain, is inserted into the fully closed seat plate abutment member against which the seat plate abuts when it reaches the fully closed position. This insertion can be done by directly inserting the lower part of the seat plate holder into a hole provided in the fully closed seat plate abutment member, or by embedding a cylindrical member inside the fully closed seat plate abutment member and inserting the lower part of the seat plate holder into the fully closed seat plate abutment member via the cylindrical member.

The latter of these allows the lower part of the seat plate pressing member to be inserted into the fully closed seat plate abutment member more reliably and stably by using a cylindrical member.

In the above-described manner, when a cylindrical member is embedded inside the fully closed seat plate abutment member and the lower part of the seat plate pressing member is inserted inside the cylindrical member, the lower part of the seat plate pressing member is inserted inside the fully closed seat plate abutment member via the cylindrical member, it is preferable to seal the inside of the cylindrical member with a sealing member when the lower part of the seat plate pressing member is not inserted inside the cylindrical member.

As a result, when the lower part of the seat plate retaining member is not inserted inside the cylindrical member, the blocking member can prevent mud, dust, etc. from entering and accumulating inside the cylindrical member.

In addition, when the lower part of the seat plate pressing member is not inserted inside the tubular member in this manner and the inside of the tubular member is blocked by a blocking member, the blocking member for blocking the inside of the tubular member may be a dedicated member for the sole purpose of blocking the inside of the tubular member, or the seat plate pressing member may be inserted entirely inside the tubular member.

Of these, with the latter, the inside of the tubular member can be sealed with a seat plate retaining member that prevents the seat plate from bending and deforming in the thickness direction of the shutter curtain, making it possible to achieve dual-purpose use of this seat plate retaining member, thereby reducing the number of parts that make up the seat plate retainer of the shutter device according to this invention.

In addition, in the seat plate holder of the shutter device according to the present invention, when the lower part of the seat plate holder member is not inserted into the inside of the tubular member as described above and the inside of the tubular member is blocked by a blocking member, it is preferable that the height position of the upper surface of the blocking member when the inside 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.

As a result, when the inside of the cylindrical member is sealed, the upper surface of the sealing member does not protrude or barely protrudes beyond the upper surface of the fully closed seat plate abutment member, so the state of the upper surface of the fully closed seat plate abutment member can be kept in the same state as it was originally.

Furthermore, in the seat plate retainer of the shutter device according to the present invention, when the lower part of the seat plate retainer member is not inserted inside the tubular member and the inside of the tubular member is sealed with a sealing member, it is preferable to provide an operating part at the top of the sealing member that is operated when removing the sealing member from the tubular member.

This makes it easier to remove the blocking member from the tubular member using the operating part located at the top of the blocking member.

When the blocking member is removed from the tubular member in this manner, the operating part provided on the top of the blocking member for this removal operation may be any part that allows the blocking member to be removed from the tubular member. One example of an operating part is, when the blocking member is a male screw member, a tool engagement groove provided on the head of the male screw member in order to rotate the male screw member with a tool such as an electric screwdriver. Another example of an operating part is an operating member that is disposed on the top of the blocking member, for example, so that it can be raised and lowered.

Furthermore, the seat plate holder 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 into upper and lower parts, and the seat plate holder of the shutter device according to the present invention can also be applied to a shutter device in which the seat plate is divided into upper and lower parts and the seat plate is configured to include a seat plate main body and a lifting body arranged below the seat plate main body so that it can be raised and lowered freely in the vertical direction relative to the seat plate main body in order to detect when the seat plate hits an obstacle during the closing movement of the shutter curtain or when the seat plate has reached the fully closed position.

When the seat plate holder of the shutter device according to the present invention is applied to a seat plate that includes a seat plate body and a lifting body that is arranged below the seat plate body and can be raised and lowered in the vertical direction relative to the seat plate body, the seat plate holder member may have a vertical length that extends to the seat plate body when the seat plate has reached the fully closed position, or the seat plate holder member may have a vertical length that extends to the lifting member when the seat plate has reached the fully closed position but does not extend to the seat plate body.

Of these, the former prevents the seat plate retainer from bending and deforming in the thickness direction of the shutter curtain for both the seat plate body and the lifting body, while the latter allows the vertical length of the seat plate retainer to be shortened.

The seat plate retainer member in the seat plate retainer of the shutter device according to this invention can be made of any material, and this member may be a male threaded member, or a hollow or solid rod-shaped member with a circular or rectangular cross section, etc.

The seat plate holders of each of the shutter devices described above can be applied to shutter devices for any purpose where the shutter curtain is expected to be subjected to loads such as wind pressure in the thickness direction of the shutter curtain, one of which is an entrance shutter device that opens and closes the entrance to a building, garage, etc., and another is a window shutter device. Furthermore, the seat plate holders of each of the shutter devices described above can also be applied to disaster prevention shutter devices in which the pressure of flames, smoke, etc., and negative pressure from exhaust air act on the shutter curtain that is fully closed to form a disaster prevention compartment in the event of a fire, etc., and can also be applied to shutter devices in which the shutter curtain is fully closed to waterproof the shutter curtain.

Furthermore, the seat plate holders for each of the shutter devices described above can be applied to shutter devices to be installed in newly constructed buildings, shutter devices to be renovated, and can also be applied to shutter devices that have already been installed.

The seat plate holders for each of the shutter devices described above can be applied to slat-type shutter devices in which the entire or nearly entire or partial part of the shutter curtain excluding the seat plate is formed by connecting multiple slats, panel-type shutter devices formed by connecting multiple panels, sheet-type shutter devices formed from a sheet, and even composite shutter devices formed from a combination of these components.

The present invention has the effect of preventing the seat panel from bending and deforming due to wind pressure during strong winds caused by typhoons.

FIG. 1 is an overall front view of a shutter device, showing a seat plate retainer according to a first embodiment of the present invention using a bridging member, as viewed from the outside of a room when the shutter curtain is fully closed. FIG. 2 is a cross-sectional view taken along line S2-S2 of FIG. FIG. 3 is a cross-sectional view taken along line S3-S3 in FIG. FIG. 4 is a view similar to FIG. 3, but showing a state after the shutter curtain has moved from the fully closed position to the open position. FIG. 5 is a view similar to FIG. 3, showing a seat plate retainer according to a second embodiment of the present invention using a bridging member. FIG. 6 is a view similar to FIG. 4 of the embodiment of FIG. FIG. 7 is a view similar to FIG. 3, showing a seat plate retainer according to a third embodiment of the present invention, which uses a bridge member. FIG. 8 is a view similar to FIG. 4 of the embodiment of FIG. FIG. 9 is a view similar to FIG. 3, showing a seat plate retainer according to a first embodiment of the present invention using a seat plate retaining member. FIG. 10 is a view similar to FIG. 4 of the embodiment of FIG. FIG. 11 is a view similar to FIG. 3, showing a seat plate retainer according to a second embodiment of the present invention, which uses a seat plate retaining member. FIG. 12 is a view similar to FIG. 4 of the embodiment of FIG. FIG. 13 is a view similar to FIG. 3, showing a seat plate retainer according to a third embodiment of the present invention, which uses a seat plate retaining member. FIG. 14 is a view similar to FIG. 4 of the embodiment of FIG. FIG. 15 is a view similar to FIG. 3, showing a seat plate retainer according to a fourth embodiment of the present invention, which uses a seat plate retaining member. FIG. 16 is a view similar to FIG. 4 of the embodiment of FIG. FIG. 17 is a view similar to FIG. 3, showing a seat plate retainer according to a fifth embodiment of the present invention, which uses a seat plate retaining member. FIG. 18 is a view similar to FIG. 4 of the embodiment of FIG. FIG. 19 is a view similar to FIG. 3, showing a seat plate retainer according to a sixth embodiment of the present invention, which uses a seat plate retaining member. 20 is a perspective view showing the seat plate retainer member and the cylindrical member shown in FIG. 19. FIG. FIG. 21 is a view similar to FIG. 4 of the embodiment of FIG.

The following describes the embodiment of the present invention with reference to the drawings. Fig. 1 shows an overall front view of a shutter device to which a seat plate holder according to one embodiment of the present invention is applied. This shutter device is an entrance shutter device installed at the entrance of a building such as a warehouse, and Fig. 1 shows the shutter device from the outside when the shutter curtain is fully closed. This entrance shutter device is attached to a building structure such as a wall and is guided by guide rails 1 arranged on both the left and right sides, and is movable up and down to open and close. The shutter curtain 2 is provided with a curtain body 3 and a seat plate 4 provided at the lower end of the curtain body 3. The curtain body 3, which forms almost the entire shutter curtain 2, is made up of many slats 5 arranged 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 attached to a hanging wall or the like in the ceiling space above the ceiling 15. The driving force from an opening/closing device 8, which is a combination of an electric motor and a brake that is driven by the operation of an operating device (not shown), is transmitted to this winding shaft 7 via a transmission means 9 composed of a sprocket wheel, chain, etc. The forward and reverse rotation driving force from the electric motor of the opening/closing device 8 rotates the winding shaft 7 forward and reverse, winding and unwinding the shutter curtain 2 on the winding shaft 7, which is guided by the guide rails 1 on both the left and right sides to open and close in the vertical direction.

The shutter curtain 2, whose lower end on the closing side is the seat plate 4, moves downwards and comes into contact with the floor surface 10A of the floor member 10 of the entrance/exit, causing the shutter curtain 2 to be fully closed. The shutter curtain 2 also moves upwards and opens until the seat plate 4 reaches the height of the lintel member 11, which forms a slit in the ceiling 15 for inserting the shutter curtain 2 vertically, causing the shutter curtain 2 to be fully open.

As described above, the shutter curtain 2 moves downwards and the seat plate 4 abuts against the floor surface 10A of the floor member 10 at the entrance/exit, causing the seat plate 4 to reach the fully closed position. Therefore, the floor member 10, whose upper surface is the floor surface 10A and which is made of concrete, mortar, asphalt, etc., is the fully closed seat plate abutment member in this embodiment.

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

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

For this reason, even if the wind pressure from strong typhoon winds, for example, acts in the thickness direction of the shutter curtain 2 when it has reached the fully closed position or when it is moving between opening and closing, causing the curtain body 3 to bend and deform in the thickness direction of the shutter curtain 2, the protrusions 12A of the slip-out prevention members 12 engage with the lip portions 1B, 1C of the guide rail 1, preventing the left and right sides of the curtain body 3 from slipping out from inside the guide rail 1.

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

Figure 3 also shows the seat plate retainer 20 according to this embodiment, which is also shown in Figure 1. This seat plate retainer 20, which is located in the center of the length of the seat plate 4, which is the left-right direction, is composed of a bridging member 21 located on the outside of the room and a bridging member 22 located on the inside of the room, on both sides of the thickness of the shutter curtain 2, as shown in Figure 3. These bridging members 21, 22, which are folded flat bars, are diagonally bridged between the seat plate 4 and the floor member 10, which is the fully closed seat plate abutment member described above, when the seat plate 4 reaches the fully closed position. To enable this bridge, reinforcing members 23, 24 made of thick plates are attached to the rising portion 14 of the seat plate 4 and the lowest slat 5A with fasteners such as screws or rivets. The ends 21A, 22A of the bridge members 21, 22 on the seat plate 4 side, which are parallel or nearly parallel to the rising portion 14, are connected to the reinforcing members 23, 24 by fasteners 25, 26 when the seat plate 4 reaches the fully closed position. These fasteners 25, 26 are hexagonal head bolts into which the male threads, which form the shafts 25A, 26A of the fasteners 25, 26, are screwed into the female threaded holes 23A, 24A formed in the reinforcing members 23, 24.

In addition, two cylindrical members 27 are embedded inside the floor member 10 at positions on both sides of the thickness of the shutter curtain 2 when the seat plate 4 reaches the fully closed position, and at positions offset from the seat plate 4 in the thickness direction of the shutter curtain 2. These cylindrical members 27, which have a bottom 27A, consist of a large diameter portion 27B at the top and a small diameter portion 27C at the bottom, and this small diameter portion 27C is a female threaded portion with a threaded portion formed on the inner circumferential surface. Of the bridging members 21 and 22, the ends 21B and 22B on the floor member 10 side, which are parallel or approximately parallel to the floor surface 10A of the floor member 10, are connected to the respective cylindrical members 27 by fasteners 28 when the seat plate 4 reaches the fully closed position. These fasteners 28 are hexagonal head bolts into which the male threaded portion, which is the shaft portion 28A of the fastener 28, is screwed into the small diameter portion 27C of the cylindrical member 27.

In this way, the fastener 28 has a shaft portion 28A that is a male thread that is inserted into the inside of the tubular member 27, and this shaft portion 28A is screwed into the small diameter portion 27C that is a female thread of the tubular member 27, so that the fastener 28 is connected to the tubular member 27, and therefore the tubular member 27 serves as a connecting member to which the fastener 28 is connected.

As described above, when the seat plate 4 reaches the fully closed position, the end portions 21A, 22A of the bridging members 21, 22 arranged on both sides of the thickness direction of the shutter curtain 2 on the seat plate 4 side are connected to the reinforcing members 23, 24 by the fasteners 25, 26, so that these end portions 21A, 22A are connected to the seat plate 4 by the fasteners 25, 26, and the end portions 21B, 22B of the bridging members 21, 22 on the floor member 10 side are connected to the respective tubular members 27 embedded inside the floor member 10 by the fasteners 28, so that these end portions 21B, 22B are connected to the floor member 10 by the fasteners 28. Therefore, when the seat plate 4 reaches the fully closed position, these bridging members 21, 22 are bridging diagonally between the seat plate 4 and the floor member 10. As a result, the strength of the seat plate 4, whose length direction is the width direction of the shutter curtain 2, is reinforced by the bridging members 21, 22 on both sides of the thickness direction of the shutter curtain 2.

For this reason, for example, the bridging member 22 arranged on the inside of the room can prevent the seat board 4 from bending toward the inside of the room due to wind pressure from a typhoon, and the bridging member 21 arranged on the outside of the room can prevent the seat board 4 from bending toward the outside of the room due to, for example, backflowing wind. This prevents the seat board 4 from bending on both sides of the thickness of the shutter curtain 2, and also prevents the central part of the seat board 4 in the length direction from lifting up due to this bending, thereby preventing a large gap from occurring between the seat board 4 and the floor surface 10A of the floor member 10.

Figure 4 shows a state when it is no longer necessary to reinforce the strength of the seat plate 4 with the bridging members 21, 22 due to the passage of a typhoon or the like, and at this time, the bridging members 21, 22 are removed by removing the fasteners 25, 26, 28, after which the shutter curtain 2 is opened and closed. Also, the shaft 29B of a blocking member 29 with a lid 29A made of hard synthetic resin or the like is pressed into the female threaded holes 23A, 24A of the reinforcing members 23, 24 from which the fasteners 25, 26 have been removed, and these female threaded holes 23A, 24A are blocked by the blocking member 29. In addition, the fasteners 28 that connect the ends 21B, 22B of the bridging members 21, 22 on the floor member 10 side to the floor member 10 via the tubular members 27 are removed, and the shaft 30B of the blocking member 30 with the head 30A made of hard synthetic resin or the like is pressed into the interior of each tubular member 27 to which the fasteners 28 are not connected, so that the interior of these tubular members 27 is blocked by the blocking member 30.

As a result, during normal operation when the shutter curtain 2 is being opened and closed in the vertical direction, the blocking member 30 can prevent mud, dust, etc. from entering and accumulating inside the cylindrical member 27.

In addition, when the insides of the two cylindrical members 27 are blocked by the blocking members 30 in this manner, the height position of the top surface of the heads 30A, which form the top surface of these blocking members 30, coincides or nearly coincides with the height position of the floor surface 10A, which forms the top surface of the floor member 10. As a result, the heads 30A do not protrude or barely protrude from the floor surface 10A, so that this floor surface 10A is in the same state or nearly the same state as the original floor surface, and therefore people passing through the aforementioned entranceway, whose underside is the floor surface 10A, can pass through as usual without paying special attention to the blocking members 30.

As shown in FIG. 4, the head 30A, which is the top of the blocking member 30, is provided with an operating part 30C that is used when removing the blocking member 30 from inside the tubular member 27. The operating part 30C is, for example, a gripping member 31 with a pivot shaft part that is inserted into holes formed in two opposite places in the head 30A, which is circular in a plan view, at both ends of a semicircular main body made of a hard metal wire. The gripping member 31, which can be raised and lowered relative to the head 30A around these pivot shaft parts, is raised as shown by the two-dot chain line, and then the gripping member 31 is gripped, whereby the blocking member 30 can be removed from inside the tubular member 27.

Therefore, even if the interiors of the two unconnected tubular members 27 shown in FIG. 3 are blocked by the blocking member 30 during normal times when no typhoon is approaching, the work of removing the blocking member 30 from the interiors of the tubular members 27 can be easily and quickly performed by using the knob member 31 when a typhoon is approaching.

Figure 5 shows an embodiment of the seat plate retainer 20' in which the bridge members 21 and 22 shown in Figure 3 are used, but the two fasteners 28 shown in Figure 3 are not used, and two fasteners 38 are used instead of these fasteners 28. The fastener 38 in this embodiment is a bolt with a head 38B at the tip of the shaft 38A, which is a male threaded portion, that is circular in plan view, and an operating portion 38C for rotating the fastener 38 is formed on the top surface of the head 38B, which is the top of the bolt, and this operating portion 38C is a groove 39 that can engage a tool such as an electric screwdriver for rotating the fastener 38. In addition, the tubular member 37 embedded inside the floor member 10 as a connecting member to connect these fasteners 38 is similar to the tubular member 27 shown in Figures 3 and 4, and consists of a bottom portion 37A, an upper large diameter portion 37B, and a lower small diameter portion 37C that is an internally threaded portion, and the size of the inside of the large diameter portion 37B corresponds to the size of the head portion 38B of the fastener 38.

In this embodiment, the ends 21B, 22B of the bridge members 21, 22 on the floor member 10 side are joined to the floor member 10 by screwing the shaft portion 38A, which is the male thread portion of the fastener 38, into the small diameter portion 37C of the tubular member 37.

In addition, in this embodiment, the total length of the interior of the tubular member 37 in the vertical direction is the same as or greater than the total length of the fastener 38 in the vertical direction. Therefore, after the fastener 38 is removed from the tubular member 37 in order to remove the bridging members 21, 22 due to the passage of a typhoon or the like, as shown in FIG. 6, that is, when the ends 21B, 22B of the bridging members 21, 22 on the floor member 10 side are not fastened to the floor member 10 by the fastener 38, the removed fastener 38 can be used as it is as a blocking member for blocking the interior of the tubular member 37. This allows the fastener 38 to be used for multiple purposes, and also reduces the number of parts constituting the seat plate retainer 20' according to this embodiment.

In this embodiment, when the inside of the tubular member 37 is blocked by the fastener 38, the height position of the top surface of the head 38B, which is the top of the fastener 38, coincides or approximately coincides with the height position of the floor surface 10A, which is the top surface of the floor member 10. Furthermore, since the groove 39, which is the above-mentioned operating part 38C, is formed on the top surface of this head 38B, the fastener 38, which is the blocking member blocking the inside of the tubular member 37, can be easily and quickly removed from the inside of the tubular member 37 by engaging a tool such as an electric screwdriver with the groove 39.

In addition, instead of making the operating portion 38C a groove 39, the operating portion 38C may be a knob member 31 as shown in FIG. 4 that can rotate the fastener 38.

The seat plate retainer 40 of the embodiment shown in Figure 7 is applied to a seat plate 43 that includes a seat plate body 41 and a lifting body 42 that is arranged below the seat plate body 41 so that it can be raised and lowered in the vertical direction relative to the seat plate 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 present at the aforementioned entrance/exit.

8, the lifting body 42, which is one of the components constituting the seat plate 43, has an extension 42A extending upward and penetrating into the seat plate body 41 through an opening 41A formed on the underside of the seat plate body 41, and a locking portion 42B protruding outward in the thickness direction of the shutter curtain 2 is provided at the tip of each of the pair of extensions 42A provided in the thickness direction of the shutter curtain 2. When the shutter curtain 2 moves up and down or reaches the fully open position described above, as shown in FIG. 8, the locking portion 42B locks from above to the locking portion 41B forming the outer edge of the opening 41A of the seat plate body 41, so that the lifting body 42 descends to the lowest position relative to the seat plate body 41. In addition, inside the seat plate body 41, a swinging member 44 that can swing up and down around the shaft portion 41C and a sensor 46 such as an electric switch attached to the mounting member 45 are arranged. In addition, a push-up member 48 is erected on the lifting body 42, and its lower end is connected to the lifting body 42 by a fastener 47 such as a rivet.

If an obstacle is present at the entrance during the closing movement of the shutter curtain 2, which has reached the fully open position, the lifting body 42 comes into contact with the obstacle and stops, and the seat plate body 41 further descends relative to the lifting body 42, so that the locking portion 42B of the extension portion 42A of the lifting body 42 and the push-up member 48 cause the swinging member 44 disposed inside the seat plate body 41 to swing upward about the shaft portion 41C (see FIG. 7), which activates the sensor 46 by the swinging member 44. The signal from the sensor 46 is sent wirelessly or by wire to a control device disposed, for example, in the lintel member 11 of FIG. 1, and the control by this control device stops the drive of the electric motor of the opening/closing machine 8 of FIG. 1 and turns on the brake, stopping the rotation of the winding shaft 7 and stopping the closing movement of the shutter curtain 2. When the obstacle is removed, the lifting body 42 descends, causing the swinging member 44 to swing downward around the shaft 41C, and the sensor 46 reverses its motion, causing a signal from the control device to start driving the electric motor of the opening/closing machine 8, turning off the brake, and the shutter curtain 2 begins to move closed.

As shown in FIG. 7, the sensor 46 operates even when the shutter curtain 2 is fully closed by the seat plate 43 abutting against the floor surface 10A. However, for example, a winding shaft rotation speed detector for detecting the rotation speed of the winding shaft 7 may be disposed on the winding shaft 7 in FIG. 1, and the winding shaft rotation speed detector may detect that the shutter curtain 2 has reached the fully closed position. The aforementioned control device to which the signal from the winding shaft rotation speed detector is sent may stop the driving of the electric motor of the opening/closing device 8 and turn on the brake, thereby stopping the closing movement of the shutter curtain 2 that has reached the fully closed position. In this case, the signal sent from the sensor 46 is invalidated in the aforementioned control device.

In this embodiment, the lifting body 42 of the seat plate 43 is provided with a push-up member 48 whose lower end is connected by a fastener 47 as described above, and this fastener 47 has a portion that protrudes downward from the underside of the lifting body 42. Therefore, in this embodiment, when the seat plate 43 reaches the fully closed position, or in other words, when the shutter curtain 2 is fully closed, the portion of the fastener 47 that protrudes downward from the underside of the lifting body 42 abuts against the floor surface 10A.

As shown in Figure 7, the seat panel retainer 40 in this embodiment also includes a bridging member 51 arranged on the outside of the room on both sides of the thickness of the shutter curtain 2, and a bridging member 52 arranged on the inside of the room. These bridging members 51, 52, which are folded flat bars, are bridging diagonally between the seat panel main body 41 of the seat panel 43 and the floor member 10 when the seat panel 43 reaches the fully closed position. To enable this bridge, reinforcing members 53, 54 are attached to the rising portions 41D, 41E of the seat plate body 41, which is connected to the lowest slat 5A, with fasteners such as screws or rivets. The ends 51A, 52A of the bridge members 51, 52 on the seat plate 43 side, which are parallel or approximately parallel to the rising portions 41D, 41E, are connected to the reinforcing members 53, 54 by fasteners 55, 56 when the seat plate 43 reaches the fully closed position. These fasteners 55, 56 are also hexagonal head bolts whose male threads, which form the shafts 55A, 56A of the fasteners 55, 56, are screwed into female threaded holes 53A, 54A formed in the reinforcing members 53, 54.

In addition, two cylindrical members 37 used in the embodiment of Figures 5 and 6 are embedded inside the floor member 10 at positions on both sides of the thickness direction of the shutter curtain 2 when the seat plate 43 reaches the fully closed position, and at positions shifted from the seat plate 43 in the thickness direction of the shutter curtain 2. Of the bridging members 51 and 52, the ends 51B and 52B on the floor member 10 side that are parallel or approximately parallel to the floor surface 10A of the floor member 10 are connected to the respective cylindrical members 37 by the fasteners 38 also used in the embodiment of Figures 5 and 6 when the seat plate 4 reaches the fully closed position, and these connections are made by screwing the male threaded portion that is the shaft portion 38A of the fasteners 38 into the small diameter portion 37C that is the female threaded portion of the cylindrical member 37.

In this embodiment, when the seat plate 43 reaches the fully closed position, the bridging members 51, 52 are diagonally bridged between the seat plate body 41 of the seat plate 43 and the floor member 10. As a result, the strength of the seat plate body 41, whose length is the width direction of the shutter curtain 2, is reinforced by the bridging members 51, 52 on both sides in the thickness direction of the shutter curtain 2, and therefore the seat plate body 41 is prevented from bending and deforming on both sides in the thickness direction of the shutter curtain 2 due to wind pressure from strong typhoon winds, etc. In addition, since the seat plate body 41 is the main component of the seat plate 43, the strength of the seat plate body 41 is reinforced by the bridging members 51, 52, and therefore the lifting body 42 is also prevented from bending and deforming in the thickness direction of the shutter curtain 2.

In this embodiment, the tubular member 37 and the fastener 38 used in the embodiment of Figs. 5 and 6 are used, so the tubular member 37 is a connecting member to which the fastener 38, which is a member for fastening the ends 51B, 52B of the bridging members 51, 52 on the floor member 10 side to the floor member 10, is connected. In addition, after the fastener 38 is removed from the tubular member 37 to remove the bridging members 51, 52 due to the passage of a typhoon or the like, as shown in Fig. 8, that is, when the ends 51B, 52B of the bridging members 51, 52 on the floor member 10 side are not fastened to the floor member 10 by the fastener 38, the removed fastener 38 can be inserted into the inside of the tubular member 37, and the fastener 38 can be used as it is as a blocking member for blocking the inside of the tubular member 37.

In addition, in this embodiment, when the inside of the tubular member 37 is sealed with the fastener 38, the height position of the top surface of the head 38B, which is the top of the fastener 38, coincides or approximately coincides with the height position of the floor surface 10A, which is the top surface of the floor member 10. Furthermore, since the groove 39, which is the above-mentioned operating part 38C, is formed on the top surface of this head 38B, the fastener 38, which is a sealing member for sealing the inside of the tubular member 37, can be easily and quickly removed from the inside of the tubular member 37 by engaging a tool such as an electric screwdriver with the groove 39.

In this embodiment, instead of making the operating portion 38C a groove 39, the operating portion 38C may be the knob member 31 shown in FIG. 4 that can rotate the fastener 38.

In addition, in this embodiment, as shown in FIG. 8, when it becomes unnecessary to reinforce the strength of the seat plate 4 with the bridge members 51, 52 due to the passage of a typhoon or the like, the female threaded holes 53A, 54A of the reinforcing members 53, 54 from which the fasteners 55, 56 have been removed are pressed into the female threaded holes 53A, 54A of the reinforcing members 53, 54 with the shank 59B of the blocking member 59 with the lid portion 59A made of hard synthetic resin or the like, as in the embodiment of FIG. 4, and these female threaded holes 53A, 54A are blocked by the blocking member 59.

The seat plate holder 60 of the embodiment shown in Figure 9 is applied to the same seat plate 4 as the embodiment of Figures 3 to 6. This seat plate holder 60 is composed of two cylindrical members 61 embedded inside the floor member 10, which serves as the fully closed seat plate abutment member described above, at two locations offset 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 two seat plate holder members 62, the lower parts of which are inserted into the interior of the cylindrical members 61, and thus the interior of the floor member 10.

Each cylindrical member 61, like the cylindrical members 27 and 37 in the previous embodiments, consists of a bottom portion 61A, an upper large diameter portion 61B, and a small diameter portion 61C that is provided below the large diameter portion 61B and is a female threaded portion. The seat plate pressing member 62 is a long bolt with a head 62B that is circular in a plan view and is provided at the tip of the shaft portion 62A that is a male threaded portion. On the top surface of the head 62B, which is the top of the bolt, an operating portion 62C for rotating the seat plate pressing member 62 is formed as a groove 63 that can engage with a tool such as an electric screwdriver for rotating the seat plate pressing member 62.

The size of the inside of the large diameter portion 61B of the tubular member 61 corresponds to the size of the head portion 62B of the seat plate retainer member 62, and the total length of the inside of the tubular member 61 in the vertical direction is the same as or greater than the total length of the seat plate retainer member 62 in the vertical direction.

In this embodiment, as shown in FIG. 9, when the seat plate 4 reaches the fully closed position, the lower part of the shaft part 62A, which is the male thread part of the seat plate pressing member 62, is screwed into the small diameter part 61C, which is the female thread part of the cylindrical member 61, and the seat plate pressing member 62 is lowered by this screwing and rotating operation until the lower surface 62D of the head part 62B of the seat plate pressing member 62 comes into contact with the upper surface 13A, which is the horizontal or nearly horizontal surface of the seat plate main part 13 of the seat plate 4, or faces this upper surface 13A with a small gap, as shown in FIG. 9. When this operation is performed, the upper part of the shaft part 62A of each seat plate pressing member 62 is positioned in a position where it comes into contact with the side surfaces 13B, 13C on both sides of the thickness direction of the shutter curtain 2 of the seat plate main part 13, or faces these side surfaces 13B, 13C with a small gap.

Therefore, in this embodiment, the seat plate 4 that has reached the fully closed position is prevented from being deflected and deformed in the thickness direction of the shutter curtain 2, that is, toward the inside or outside of the room due to wind pressure from the strong winds of the typhoon, by the side surfaces 13B, 13C of the seat plate main part 13 abutting against the upper parts of the shaft parts 62A of each seat plate pressing member 62 that are in contact with the side surfaces 13B, 13C of the seat plate main part 13 or face them with a small gap. In addition, at this time, the seat plate 4 is prevented from lifting up from the floor surface 10A by the upper surface 13A of the seat plate main part 13 abutting against the lower surface 62D of the head part 62B of the seat plate pressing member 62, thereby preventing the shutter curtain 2 from moving in the opening direction.

In addition, when it becomes unnecessary to prevent the seat plate 4 from bending and deforming 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 tubular member 61, allowing the shutter curtain 2 to be opened and closed in the vertical direction as shown in FIG. 10, and the entire length of each seat plate pressing member 62 is inserted inside the tubular member 61. This allows the seat plate pressing member 62 to be used as a blocking member for blocking the inside of the tubular member 61, making it possible to use the seat plate pressing member 62 for multiple purposes.

In this embodiment, when the seat plate pressing member 62 is blocking the inside of the tubular member 61, the height position of the top surface of the head 62B, which is the top of the seat plate pressing member 62, coincides or approximately coincides with the height position of the floor surface 10A, which is the top surface of the floor member 10. Furthermore, since the groove 63, which is the above-mentioned operating part 62C, is formed on the top surface of this head 62B, the seat plate pressing member 62, which is a blocking member for blocking the inside of the tubular member 61, can be easily and quickly removed from the inside of the tubular member 61 by engaging a tool such as an electric screwdriver with the groove 63.

In this embodiment, instead of making the operating portion 62C a groove 63, the operating portion 62C may be the knob member 31 shown in FIG. 4 that can rotate the seat plate retaining member 62.

The seat plate retainer 70 of the embodiment shown in Figure 11 uses the tubular member 61 and seat plate retainer member 62 used in the embodiment of Figure 9, but the positions at which the two tubular members 61 are embedded inside the floor member 10 are on both sides in the thickness direction of the shutter curtain 2, and are within the range of the underside of the seat plate main part 13 of the seat plate 4 when it has reached the fully closed position. Therefore, the two seat plate retainer members 62, whose lower parts are inserted into the interior of the respective tubular members 61 and thereby inserted into the interior of the floor member 10, are positioned so as to vertically penetrate the seat plate main part 13 of the seat plate 4 when it has reached the fully closed position. In order to allow the seat plate pressing member 62 to penetrate the seat plate main part 13 of the seat plate 4 when it has reached the fully closed position, two pipe members 71 are arranged with their axial direction facing up and down at two locations in the thickness direction of the shutter curtain 2 on the seat plate main part 13, and the height positions of the upper and lower surfaces of these pipe members 71 match or approximately match the height positions of the upper and lower surfaces of the seat plate main part 13.

When the seat plate 4 reaches the fully closed position, the shaft portion 62A of each seat plate retaining member 62 is inserted from above into the inside of the pipe member 71, and the lower portion of these shaft portions 62A is screwed into the small diameter portion 61C, which is the female thread portion of the cylindrical member 61 embedded inside the floor member 10.

As a result, similar to the embodiment in FIG. 9, the upper part of the shaft parts 62A of the two seat plate pressing members 62 can prevent the seat plate 4 from bending in the thickness direction of the shutter curtain 2. Also, by bringing the lower surface of the head part 62B of the seat plate pressing member 62 into contact with the horizontal or nearly horizontal upper surface of the seat plate main part 13, or by having it face this upper surface with a small gap, similar to the embodiment in FIG. 9, the seat plate 4 can be prevented from lifting up from the floor surface 10A.

When it becomes unnecessary to prevent the seat plate 4 from bending and deforming 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 tubular member 61 and also from the pipe member 71, and as shown in FIG. 12, the shutter curtain 2 can be opened and closed in the vertical direction, and the entire length of each seat plate pressing member 62 is inserted inside the tubular member 61. Also, as shown in FIG. 12, the shaft 72B of the blocking member 72 with the lid 72A made of hard synthetic resin or the like is pressed into the upper and lower ends of each pipe member 71, thereby blocking the upper and lower ends of each pipe member 71 with the blocking member 72.

When the entire length of each seat plate pressing member 62 is inserted into the interior of the tubular member 61, the height position of the upper surface of the head 62B of the seat plate pressing member 62 coincides or approximately coincides with the height position of the floor surface 10A, which is the upper surface of the floor member 10. Furthermore, since the groove 63, which is the aforementioned operating part 62C, is formed on the upper surface of the head 62B, which is the top of the seat plate pressing member 62, the seat plate pressing member 62, which is a blocking member for blocking the interior of the tubular member 61, can be easily and quickly removed from the interior of the tubular member 61 by engaging a tool such as an electric screwdriver with the groove 63.

In this embodiment, instead of making the operating portion 62C a groove 63, the operating portion 62C may be the knob member 31 shown in FIG. 4 that can rotate the seat plate retaining member 62.

The seat plate retainer 80 shown in Figure 13 is applied to a seat plate 43 which includes a seat plate main body 41 and a lifting body 42 arranged below the seat plate main body 41 so as to be able to move up and down freely relative to the seat plate main body 41, similar to the embodiment in Figures 7 and 8. The seat plate holder 80 in this embodiment is composed of two cylindrical members 81 embedded inside the floor member 10 and two seat plate holder members 82 whose lower parts are inserted into the cylindrical members 81 when the seat plate 43 reaches the fully closed position. The two cylindrical members 81 are embedded inside the floor member 10 at positions on both sides in the thickness direction of the shutter curtain 2, within the range of the underside of the lifting body 42 of the seat plate 43 that has reached the fully closed position. The two seat plate holder members 82, whose lower parts are inserted into the interior of the floor member 10 by inserting their lower parts into the respective cylindrical members 81, are positioned to vertically penetrate both the seat plate body 41 and the lifting body 42 of the seat plate 43 that has reached the fully closed position.

For this reason, in order to vertically penetrate the two seat plate pressing members 82 through both the seat plate body 41 and the lifting body 42 of the seat plate 43 that has reached the fully closed position, two pipe members 84 are arranged with their axial direction facing up and down at two locations in the thickness direction of the shutter curtain 2 on the seat plate body 41, and two pipe members 85 are arranged with their axial direction facing up and down at two locations in the thickness direction of the shutter curtain 2 on the lifting body 42 that correspond to the positions of the two pipe members 84. The height positions of the upper and lower surfaces of the pipe members 84 provided on the seat plate body 41 match or approximately match the height positions of the upper and lower surfaces of the seat plate body 41, and the height positions of the upper and lower surfaces of the pipe members 85 provided on the lifting body 42 match or approximately match the height positions of the upper and lower surfaces of the lifting body 42.

Each cylindrical member 81, like the cylindrical members 27, 37, and 61 of the previous embodiments, consists of a bottom portion 81A, an upper large diameter portion 81B, and a small diameter portion 81C that is provided below the large diameter portion 81B and is a female threaded portion. The seat plate pressing member 82 is a long bolt with a head 82B that is circular in a plan view and is provided at the tip of the shaft portion 82A that is a male threaded portion, and on the top surface of the head 82B, which is the top of the bolt, an operating portion 82C for rotating the seat plate pressing member 82 is formed as a groove 83 that can engage with a tool such as an electric screwdriver for rotating the seat plate pressing member 62.

The size of the inside of the large diameter portion 81B of the cylindrical member 81 corresponds to the size of the head portion 82B of the seat plate retainer member 82, and the total length of the inside of the cylindrical member 81 in the vertical direction is the same as or greater than the total length of the seat plate retainer member 82 in the vertical direction.

In this embodiment, as shown in FIG. 13, when the seat plate 43 reaches the fully closed position, the shaft portion 82A, which is the male thread portion of the seat plate pressing member 82, is inserted from above into the inside of the pipe member 84 and then into the inside of the pipe member 85, and 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 thread portion of the cylindrical member 81. The seat plate pressing member 82 is lowered by this screwing and rotating operation until the underside of the head portion 82B of the seat plate pressing member 82 comes into contact with the upper surface of the seat plate main body 41, which is a horizontal or nearly horizontal surface, or faces this upper surface with a small gap, as shown in FIG. 13.

For this reason, in this embodiment, the seat plate pressing member 82 has a vertical length that extends to the seat plate body 41 when the seat plate 43 reaches the fully closed position.

In this embodiment, the seat plate body 41 and lifting body 42 of the seat plate 43 that has reached the fully closed position are prevented from being deformed by wind pressure from the strong winds of a typhoon toward the inside or outside of the room, which is the thickness direction of the shutter curtain 2, by the portion of the entire vertical length of the seat plate pressing member 82 that is inserted into the pipe members 84 and 85. At this time, the seat plate body 41 is also prevented from floating up by the upper surface of the seat plate body 41 abutting against the underside of the head 82B of the seat plate pressing member 82.

In addition, when it becomes unnecessary to prevent the seat plate body 41 and the lifting body 42 of the seat plate 43 from bending and deforming 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 tubular member 81 and also from the pipe members 84 and 85, allowing the shutter curtain 2 to be opened and closed in the vertical direction as shown in FIG. 14, and the entire length of each seat plate pressing member 82 is inserted inside the tubular member 81. This allows the seat plate pressing member 82 to be used as a blocking member for blocking the inside of the tubular member 81, making it possible to use the seat plate pressing member 82 for multiple purposes.

In this embodiment, when the inside of the tubular member 81 is blocked by the seat plate pressing member 82, the height position of the upper surface of the head 82B, which is the top of the seat plate pressing member 82, coincides or approximately coincides with the height position of the floor surface 10A, which is the upper surface of the floor member 10. Furthermore, since the groove 83, which is the above-mentioned operating part 82C, is formed on the upper surface of this head 82B, the seat plate pressing member 82, which is a blocking member for blocking the inside of the tubular member 81, can be easily and quickly removed from the inside of the tubular member 81 by engaging a tool such as an electric screwdriver with the groove 83.

In this embodiment, instead of making the operating portion 82C a groove 83, the operating portion 82C may be the knob member 31 shown in FIG. 4 that can rotate the seat plate retaining member 82.

In addition, in this embodiment, as shown in FIG. 14, the upper and lower ends of the pipe member 84 from which the seat plate retaining member 82 has been removed and the upper and lower ends of the pipe member 85 are press-fitted with shaft portions 89B of a blocking member 89 with a lid portion 89A formed of a hard synthetic resin or the like, and these upper and lower ends are blocked by the blocking member 89.

The seat plate holder 90 shown in Figure 15, like the seat plate holder 80 shown in Figure 13, is applied to a seat plate 43 which is composed of a seat plate main body 41 and a lifting body 42 arranged below the seat plate main body 41 so as to be able to move up and down relative to the seat plate main body 41. This seat plate holder 90 is composed of two cylindrical members 91 embedded inside the floor member 10 and two seat plate holder members 92 whose lower parts are inserted into these cylindrical members 91 when the seat plate 43 reaches the fully closed position. The two tubular members 91 are embedded inside the floor member 10 at locations on both sides of the thickness of the shutter curtain 2, within the range of the underside of the lifting body 42 of the seat plate 43 when it has reached the fully closed position, and the two seat plate presser members 92, whose lower parts are inserted into the interior of the respective tubular members 91 and thus into the interior of the floor member 10, are positioned so as to vertically penetrate the lifting body 42 of the seat plate 4 that has reached the fully closed position.

For this reason, in this embodiment, in order to allow two seat plate pressing members 82 to pass vertically through the lifting body 42 of the seat plate 43 when it has reached the fully closed position, two pipe members 85, which are also used in the embodiment of Figure 13, are arranged with their axial directions facing vertically at two locations in the thickness direction of the shutter curtain 2 on the lifting body 42, and the height positions of the upper and lower surfaces of these pipe members 85 coincide or approximately coincide with the height positions of the upper and lower surfaces of the lifting body 42.

Each cylindrical member 91, like the cylindrical members 27, 37, 61, and 81 in the previous embodiments, consists of a bottom portion 91A, an upper large diameter portion 91B, and a small diameter portion 91C that is provided below the large diameter portion 91B and serves as a female thread. The seat plate pressing member 92 is a bolt with a head 92B provided at the tip of a shaft portion 92A that serves as a male thread and that is circular in a plan view. On the top surface of the head 92B that serves as the top of the bolt, an operating portion 82C for rotating the seat plate pressing member 92 is formed as a groove 93 that can engage with a tool such as an electric screwdriver for rotating the seat plate pressing member 92.

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

In this embodiment, the thickness direction dimensions of the shutter curtain 2 for the seat plate body 41 of the seat plate 43 and the lifting body 42 are the same or approximately the same, so two holes 41F are formed on the underside of the seat plate body 41 at positions corresponding to the positions of the two pipe members 85 in the lifting body 42, for connecting the internal space of the seat plate body 41 with the external space below the seat plate body 41. When the seat plate 43 is in a position above the fully closed position as shown in FIG. 16 and the vertical distance between the seat plate main body 41 and the lifting body 42 is large, the upper part of the seat plate pressing member 92, which is in a diagonal position relative to the vertical direction, is inserted into these holes 41F, and then, as can be seen from FIG. 15, the shaft portion 92A, which is the male screw portion of the seat plate pressing member 92, which has been returned to a vertical position, is inserted from above into the inside of the pipe member 85, and after the shutter curtain 2 is lowered to the fully closed position, the lower part of the shaft portion 92A of the seat plate pressing member 92 is screwed into the small diameter portion 91C, which is the female screw portion of the cylindrical member 91. Then, the lowering operation of the seat plate pressing member 92, which is performed by this screwing and rotating operation, is performed until the lower surface of the head portion 92B of the seat plate pressing member 92 comes into contact with the horizontal or nearly horizontal upper surface of the lifting body 42, or faces this upper surface with a small gap, as shown in FIG. 15.

For this reason, in this embodiment, the seat plate pressing member 92 has a vertical length that extends to the lifting body 42 when the seat plate 43 reaches the fully closed position, but does not extend to the seat plate main body 41.

In this embodiment, the lifting body 42 of the seat plate 43, which has reached the fully closed position, is prevented from being deflected and deformed toward the inside or outside of the room, which is the thickness direction of the shutter curtain 2, due to wind pressure from the strong winds of the typhoon, by the upper part of the seat plate pressing member 92, which is inserted into the pipe member 85, of the entire vertical length of the seat plate pressing member 92. In addition, at this time, the lifting body 42 is prevented from floating up by the upper surface of the lifting body 42 abutting against the underside of the head 92B of the seat plate pressing member 92.

In addition, when it becomes unnecessary to prevent the lifting body 42 of the seat plate 43 from bending and deforming in the thickness direction of the shutter curtain 2 due to the passage of a typhoon or the like, the seat plate body 41 of the seat plate 43 is raised slightly by the rise of the shutter curtain 2, and then each seat plate pressing member 92 is removed from the tubular member 91 and also from the pipe member 85, so that the shutter curtain 2 can be opened and closed in the vertical direction as shown in FIG. 16, and the entire length of each seat plate pressing member 92 is inserted inside the tubular member 91. This allows the seat plate pressing member 92 to be used as a blocking member for blocking the inside of the tubular member 91, allowing the seat plate pressing member 92 to serve multiple purposes.

In this embodiment, when the seat plate pressing member 92 is used to seal the inside of the cylindrical member 91, the height position of the top surface of the head 92B, which is the top of the seat plate pressing member 92, coincides or approximately coincides with the height position of the floor surface 10A, which is the top surface of the floor member 10. Furthermore, since the groove 93, which is the above-mentioned operating portion 92C, is formed on the top surface of the head 92B, the seat plate pressing member 92, which is a sealing member for sealing the inside of the cylindrical member 91, can be easily and quickly removed from the inside of the cylindrical member 91 by engaging a tool such as an electric screwdriver with the groove 93.

In this embodiment, instead of making the operating portion 92C a groove 93, the operating portion 92C may be the knob member 31 shown in FIG. 4 that can rotate the seat plate retaining member 92.

In addition, in this embodiment, as shown in FIG. 16, the shaft portion 89B of the blocking member 89 with the lid portion 89A made of a hard synthetic resin or the like, which is also shown in the embodiment of FIG. 14, is pressed into both the upper and lower ends of the pipe member 85 from which the seat plate retaining member 92 has been removed, and both the upper and lower ends are blocked by the blocking member 89.

This embodiment has the advantage that the vertical length of the tubular member 91 and the seat plate retainer member 92 can be made shorter than that of the tubular member 81 and the seat plate retainer member 82 used in the embodiment of FIG. 13.

In this embodiment, the thickness direction dimensions of the shutter curtain 2 for the seat plate body 41 of the seat plate 43 and the lifting body 42 are the same or approximately the same, so the above-mentioned hole 41F is provided on the underside of the seat plate body 41. However, if the thickness direction dimension of the shutter curtain 2 for the lifting body 42 is larger than the thickness direction dimension of the shutter curtain 2 for the seat plate body 41, it is not necessary to provide the hole 41F on the underside of the seat plate body 41.

The seat plate holder 100 shown in Figure 17, like the seat plate holders 40, 80, 90 shown in Figures 7, 13 and 15, is applied to a seat plate 43 which is composed of a seat plate main body 41 and a lifting body 42 arranged below the seat plate main body 41 so as to be able to move up and down relative to the seat plate main body 41. This seat plate holder 100 is composed of two cylindrical members 101 embedded inside the floor member 10 and two seat plate holder members 102 whose lower parts are inserted into these cylindrical members 101 when the seat plate 43 reaches the fully closed position. The two tubular members 101 are embedded inside the floor member 10 at positions on either side of the thickness of the shutter curtain 2, offset in the thickness direction of the shutter curtain 2 from the seat plate body 41 and the lifting body 42 of the seat plate 43 that has reached the fully closed position. The lower parts of each seat plate pressing member 102, which is a circular solid or hollow rod-shaped member in a plan view, are inserted inside the tubular members 101, and the lower parts of these seat plate pressing members 102 are inserted inside the floor member 10.

17, each cylindrical member 101, like the cylindrical members 27, 37, 61, 81, and 91 in the previous embodiments, consists of a bottom portion 101A, a large diameter portion 101B at the top, and a small diameter portion 101C provided below the large diameter portion 101B, but this small diameter portion 101C is not a female thread portion. When the seat plate 43 reaches the fully closed position, the lower portion of each seat plate pressing member 102 is inserted into the small diameter portion 101C of the cylindrical member 101, and as a result, these seat plate pressing members 102, which have a larger vertical length dimension than the cylindrical member 101, stand on their own with their lower portions inserted inside the floor member 10. At this time, the seat plate pressing member 102 is in contact with or faces with a small gap to both the seat plate body 41 and the lifting body 42 of the seat plate 43 in the thickness direction of the shutter curtain 2, and the upper end of the seat plate pressing member 102 reaches a height position that is the same as the upper surface 41G of the seat plate body 41 or a height position that exceeds this upper surface 41G.

As a result, the seat plate body 41 and lifting body 42 of the seat plate 43, which has reached the fully closed position, are prevented from bending and deforming toward the inside or outside of the room in the thickness direction of the shutter curtain 2 due to wind pressure from the strong winds of a typhoon by the upper part of the seat plate retaining member 102, excluding the lower part that is inserted into the small diameter part 101C of the tubular member 101, of the entire vertical length of the seat plate retaining member 102.

In addition, when it becomes unnecessary to prevent the seat plate body 41 and the lifting body 42 of the seat plate 43 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 blocked with a blocking member 103. This blocking member 103 is formed of, for example, a hard synthetic resin, similar to the blocking member 30 in FIG. 4, and has a head 103A equipped with a shaft portion 103B, and the shaft portion 103B is pressed into the small diameter portion 101C of the cylindrical member 101, so that the inside of the cylindrical member 101 is blocked by the blocking member 103. This makes it possible to prevent mud, dust, etc. from entering and accumulating inside the cylindrical member 101 by the blocking member 103.

When the inside of the cylindrical member 101 is blocked by the blocking member 103, the height position of the top surface of the head 103A, which is the top surface of the blocking member 103, coincides or nearly coincides with the height position of the floor surface 10A, which is the top surface of the floor member 10. As a result, the head 103A does not protrude or hardly protrudes from the floor surface 10A, and this floor surface 10A is in the same state or nearly the same state as the original floor surface, so that people passing through the aforementioned entrance with the floor surface 10A as the underside can pass through as usual without paying special attention to the blocking member 30.

18, the head 103A, which is the top of the blocking member 103, is provided with an operating part 103C that is used when removing the blocking member 103 from inside the cylindrical member 101. This operating part 103C is a gripping member 104 with a rotating central shaft part inserted into holes formed in two opposite places in the head 103A, which is circular in a plan view, at both ends of a semicircular main body formed of a hard metal wire, similar to the operating part 30C in FIG. 4. The gripping member 104, which can be raised and lowered relative to the head 103A around these rotating central shaft parts, is raised as shown by the two-dot chain line in FIG. 18, and then the gripping member 104 is gripped to remove the blocking member 103 from inside the cylindrical member 101.

Therefore, even if the insides of the two cylindrical members 101 shown in FIG. 18 are blocked by the blocking members 103 during normal times when no typhoon is approaching, when a typhoon is approaching, the work of removing the blocking members 103 from the insides of the cylindrical members 101 can be easily and quickly performed by using the knob members 104.

The seat plate holder 100 of this embodiment shown in Figure 17 can also be applied to the seat plate 4 shown in Figure 3, etc.

The seat plate holder 110 shown in Figure 19, like the seat plate holders 40, 80, 90 and 100 shown in Figures 7, 13, 15 and 17, is applied to a seat plate 43 which includes a seat plate main body 41 and a lifting body 42 which is arranged below the seat plate main body 41 and can be raised and lowered in the vertical direction relative to the seat plate main body 41. This seat plate holder 110 is composed of two cylindrical members 111 embedded inside the floor member 10 and two seat plate holder members 112 whose lower portions are inserted into these cylindrical members 111 when the seat plate 43 reaches the fully closed position. The two tubular members 111 are embedded inside the floor member 10 at positions on either side of the thickness of the shutter curtain 2, offset 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 has reached the fully closed position, and the lower parts of each seat plate pressing member 112 are inserted inside the tubular members 111, so that the lower parts of these seat plate pressing members 112 are inserted inside the floor member 10.

The vertical length of the inside of the cylindrical member 111 is the same or approximately the same as the vertical length of the seat plate pressing member 112, and Fig. 20 shows a perspective view of the cylindrical member 111 and the seat plate pressing member 112. As shown in Fig. 20, the cylindrical member 111 has the same outer diameter dimension continuing over the entire length in the vertical direction, and has a bottom 111A, and a wall 111C protruding into the inside of the cylindrical member 111 is provided below the opening 111B at the upper end. The upper end of this wall 111C is a step 111D, and the inside of the wall 111C is a circular hole 111E in plan view with a small diameter, and the opening 111B, which has a vertical dimension, is also large. The hole 111E has a large vertical dimension from the step 111D to the bottom 111A. Additionally, two grooves 111F are formed in the wall 111C at two locations opposite each other in a plan view, with their length extending vertically from the step 111D to the bottom 111A.

The seat plate pressing member 112 is composed of a main body 112A, which is a solid or hollow rod-shaped part that is circular in plan view and has a diameter corresponding to the hole 111E of the cylindrical member 111, and a head 112B that is circular in plan view and provided at the upper end of the main body 112A. The diameter and vertical dimensions of the head 112B, which is the top of the seat plate pressing member 112, correspond to the diameter and vertical dimensions of the opening 111B at the upper end of the cylindrical member 111. In addition, a protrusion 112D that protrudes toward the outer diameter 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 opposite each other in a plan view.

The head 112B of the seat plate pressing member 112 is formed with an operating portion 112E, which is a finger hook 113 that protrudes horizontally toward a rectangular hole 112F in a plan view, which is formed with a certain depth on the upper surface of the head 112B. The vertical thickness dimension of this finger hook 113 is smaller than the depth of the hole 112F, which has a horizontal width dimension that reaches below the finger hook 113. Therefore, even when the entire seat plate pressing member 112 is inserted into the inside of the cylindrical member 111 and the entire head 112B of the seat plate pressing member 112 is inserted into the inside of the opening 111B of the cylindrical member 111, the seat plate pressing member 112 can be removed from the inside of the cylindrical member 111 by hooking a finger inserted from the hole 112F on the underside of the finger hook 113.

As shown in FIG. 19, when the seat plate 43 reaches the fully closed position, the lower part of the body 112A of each seat plate pressing member 112 is inserted from the opening 111B of the tubular member 111 into the hole 111E. This insertion is performed by shifting each protrusion 112D provided on the seat plate pressing member 112 from the groove 111F of the tubular member 111, so that each protrusion 112D is placed on the step 111D of the tubular member 111. As a result, each seat plate pressing member 112 stands on its own with the lower part of the body 112A inserted into the hole 111E of the tubular member 111.

At this time, the underside of the head 112B of the seat plate pressing member 112 reaches the same height as the upper surface of the seat plate body 41 of the seat plate 43 or a higher position beyond this upper surface, so that the seat plate pressing member 112 in this embodiment has a vertical length that extends to the seat plate body 41 when the seat plate 43 reaches the fully closed position. At this time, as shown in FIG. 19, the body 112A of the seat plate pressing member 112 is in contact with or faces with a small gap to both the seat plate body 41 and the lifting body 42 in the thickness direction of the shutter curtain 2.

As a result, the seat plate body 41 and lifting body 42 of the seat plate 43, which has reached the fully closed position, are prevented from bending and deforming toward the inside or outside of the room in the thickness direction of the shutter curtain 2 due to wind pressure from the strong winds of a typhoon by the upper part of the entire vertical length of the body 112A of the seat plate pressing member 112, excluding the lower part that is inserted into the hole 111E of the tubular member 111.

In addition, when it becomes unnecessary to prevent the seat plate body 41 and the lifting body 42 of the seat plate 43 from bending and deforming 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 removed from the inside of the tubular member 111. Then, as can be seen from Fig. 21, the removed seat plate pressing member 112 is rotated around the vertical axis to align the position of the protrusion 112D of the seat plate pressing member 112 with the position of the groove 111F of the tubular member 111, and then, while inserting the protrusion 112D into the groove 111F, the seat plate pressing member 112 is inserted into the inside of each tubular member 111 from which the seat plate pressing member 112 has been removed, and this operation causes the inside of the tubular member 111 to be blocked by the entire seat plate pressing member 112. As a result, the seat plate pressing member 112, whose entire vertical length is inserted inside the cylindrical member 111, can be used as a sealing member for sealing the inside of the cylindrical member 111, allowing the seat plate pressing member 112 to be used for multiple purposes.

Even in this embodiment, when the inside of the tubular 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 or approximately coincides with the height position of the floor surface 10A, which is the upper surface of the floor member 10. Furthermore, since the finger hook 113, which is the above-mentioned operating part 112E, is provided on the upper surface of this head 112B, the operation of removing the seat plate pressing member 112, which is a blocking member for blocking the inside of the tubular member 111, from the inside of the tubular member 111 can be easily and quickly performed by the finger hook 113, which is the operating part 112E.

In this embodiment, the operating unit 112E may also be the knob member 31 shown in FIG. 4, rather than the finger hook 113.

In addition, the operation unit 103C in FIG. 18 may be used as a finger hook unit 113.

In addition, this embodiment can also be applied to cases where the vertical length dimension of the seat plate pressing member is set to a dimension that extends to the lifting body 42 when the seat plate 43 reaches the fully closed position, but does not extend to the seat plate main body 41, thereby preventing the lifting body 42 of the seat plate 43 from bending and deforming toward the inside or outside of the room, which is the thickness direction of the shutter curtain 2, due to wind pressure from strong typhoon winds.

Furthermore, this embodiment can also be applied to the seat plate 4 shown in Figure 3.

Furthermore, the cylindrical members 27, 37, 61, 81, 91, 101, and 111 in each of the embodiments described thus far have bottoms 27A, 37A, 61A, 81A, 91A, 101A, and 111A, but in order to prevent water such as rainwater from accumulating inside these cylindrical members, the cylindrical members in each embodiment may be cylindrical members without bottoms, or may be cylindrical members with bottoms that have drainage holes.

The present invention can be used, for example, to prevent the seat plate of an entrance/exit shutter device installed in a building from bending and deforming in the thickness direction of the shutter curtain.

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 a horizontal or approximately horizontal surface of the seat plate 10 Floor member which is a fully closed seat plate abutment member 10A Floor surface of the floor member which is the upper surface of the fully closed seat plate abutment member 20, 20', 40, 60, 70, 80, 90, 100 Seat plate pressing tool 21, 22, 51, 52 Bridge member 21A, 22A, 51A, 52A Seat plate side end of bridge member 21B, 22B, 51B, 52B End of bridge member on the floor member side which is the end of the fully closed seat plate abutment member side 27, 37 Cylindrical member which is also a connecting member 28, 38 Joint 30, 103 Blocking member 30A, 103A Head which is a top 30C, 103C Operation unit 41 Seat plate body 42 Lifting body 61, 81, 91, 101, 111 Cylindrical member 62, 82, 92, 102, 112 Seat plate pressing member 62B, 82B, 92B, 112B Head portion which is the top 62C, 82C, 92C, 112E Operation portion 62D Underside

Claims (16)

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 is guided by these guide rails to move up and down to open and close, 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 positioned at a position shifted in the thickness direction of the shutter curtain from the seat plate when it reaches the fully closed position, and bending deformation of the seat plate in the thickness direction of the shutter curtain is prevented by the upper part of the seat plate pressing member abutting against the side of the seat plate in the thickness direction of the shutter curtain. 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 is guided by these guide rails to move up and down to open and close, 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. The seat plate holder of the shutter device according to claim 2, characterized in that it is provided with a member with a lid for closing the upper and lower ends of the pipe member when the seat plate holder member is not inserted inside. A seat plate holder for a shutter device according to any one of claims 1 to 3, characterized in that the seat plate holder members are arranged on both sides of the shutter curtain in the thickness direction. A seat plate holder for a shutter device according to 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 can come into contact from above with a horizontal or approximately horizontal surface provided on the seat plate. A seat plate holder for a shutter device according to any one of claims 1 to 5, characterized in that a cylindrical 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 inside the fully closed seat plate abutment member, and the interior of the cylindrical member is blocked by a blocking member when the lower part of the seat plate holder member is not inserted. The seat plate holder of the shutter device according to claim 6, characterized in that the blocking member is the seat plate holder member whose entirety is inserted inside the cylindrical member. The seat plate holder for the shutter device according to claim 6 or 7, characterized in that the blocking member is a bolt having a shaft portion that is a male thread portion, and the cylindrical member has a female thread portion into which the male thread portion is screwed. The seat plate holder of the shutter device according to claim 6 or 7, characterized in that the seat plate holder member is formed with a protrusion that protrudes in the outer diameter direction, the tubular member is provided with a wall that protrudes into the interior of the tubular member, and the wall is formed with a groove in the vertical direction that does not coincide with or coincides with the position of the protrusion depending on the angle at which the seat plate holder member is rotated about a vertical axis. A seat plate holder for a shutter device according to any one of claims 6 to 9, characterized in that the height position of the upper surface of the blocking member when blocking the interior of the cylindrical member coincides or approximately coincides with the height position of the upper surface of the fully closed seat plate abutment member. A seat plate holder for a shutter device according to any one of claims 6 to 10, characterized in that the top of the blocking member is provided with an operating part that is operated when removing the blocking member from the cylindrical member. The seat plate holder for a shutter device according to claim 11, characterized in that the operating part is a knob member that can be raised and lowered. The seat plate holder for a shutter device according to claim 11, wherein the operating portion is a groove for engaging a tool. The seat plate holder of the shutter device described in claim 11, characterized in that the operating part is a finger hook part that protrudes horizontally toward a hole formed with a depth on the upper surface of the head part, which is the top part of the seat plate holder member. A seat plate holder for a shutter device according to any one of claims 1 to 14, characterized in that the seat plate includes a seat plate body and a lifting body arranged below the seat plate body so as to be able to move up and down relative to the seat plate body, and the seat plate holder has a vertical length that extends to the seat plate body when the seat plate reaches the fully closed position. A seat plate holder for a shutter device according to any one of claims 1 to 14, characterized in that the seat plate includes a seat plate body and a lifting body arranged below the seat plate body so as to be able to move up and down relative to the seat plate body, and the seat plate holder has a vertical length that extends to the lifting member when the seat plate reaches the fully closed position, but does not extend to the seat plate body.

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