JP7630819B2 - Shutter device - Google Patents

Description

The present invention relates to a shutter device.

Traditionally, shutters have been installed at the entrances to passageways at construction sites, factories, and warehouses, as well as at the entrances to buildings, to prevent unauthorized access and ensure safety.

Known types of shutters include membrane-like sheet shutters and wire mesh shutters such as those described in Patent Document 1. Wire mesh shutters are stronger and less likely to tear than sheet shutters, making them superior in terms of crime prevention and safety.

Japanese Unexamined Patent Publication No. 8-121042

However, even wire mesh shutters can be deformed by external factors such as strong winds or contact with workers. In such cases, the wire mesh needs to be replaced, but removing the wire mesh from the frame and then attaching it to the new frame is a very time-consuming process.

In consideration of these circumstances, the present invention provides a shutter device that is strong and easy to install.

The shutter device according to one aspect of the present invention includes a pair of side columns extending in the height direction, and a gate-shaped support pillar formed by a cross beam supported by the pair of side columns and extending in the gate width direction intersecting the height direction, a shutter body arranged in a closed area surrounded by the cross beam and the pair of side columns, and a drive unit that operates the shutter body in the height direction, and the shutter body has a plurality of shutter plates that are aligned toward one side of the gate depth direction intersecting the height direction and the gate width direction and are supported so as to be movable relative to each other in the height direction, and when the shutter plate is arranged in a closed position that closes the closed area, the lower ends of each of the plurality of shutter plates are arranged sequentially downward toward one side of the gate depth direction, and when the shutter plate is arranged in an open position that opens the closed area, the lower ends of each of the plurality of shutter plates are closer to each other in the height direction than when the shutter plate is arranged in the closed position.

In the above-mentioned shutter device, in the closed position, the upper end of the rear shutter plate may be disposed between the lower end and upper end of the front shutter plate in the gate depth direction out of the two shutter plates adjacent in the gate depth direction.

In the above-mentioned shutter device, the cross beam may have a storage space capable of storing multiple shutter plates inside, and a downward opening that connects the inside and outside of the storage space and allows the shutter plates to pass through.

In the above-mentioned shutter device, the drive device may have a transmission mechanism that is connected to a rear end shutter plate that is located at the innermost side of one of the plurality of shutter plates in the gate depth direction and extends in the height direction, and a drive source that is located above the plurality of shutter plates and moves the rear end shutter plate in the height direction through the transmission mechanism.

In the above-mentioned shutter device, one of the two shutter plates adjacent in the gate depth direction may be provided with a guide rail portion that guides the other in the height direction, and in the closed position, the lower shutter plate of the two shutter plates adjacent in the gate depth direction may engage in the height direction with the lower part of the upper shutter plate.

In the above-mentioned shutter device, the side pillar may be provided with a guide surface that faces the shutter plates in the gate depth direction and guides the shutter plates in the height direction.

In the above-mentioned shutter device, the side post is provided with a groove in which at least the ends of the shutter plates in the gate width direction are arranged and which extends in the height direction, and further includes a guide member that protrudes in the gate depth direction from an inner groove surface facing one side of the gate depth direction constituting the groove to form the guide surface, and the guide member may protrude gradually from the inner groove surface in the gate depth direction from the upper part to the lower part.

In the above-mentioned shutter device, the guide member may have a plurality of guide plates detachably attached to the inner surface of the groove at intervals in the height direction, and the maximum amount of protrusion from the inner surface of the groove in the gate depth direction may increase sequentially from the guide plate provided at the top to the guide plate provided at the bottom.

In the above-mentioned shutter device, each of the guide plates may have an inclined shape in which the amount of protrusion from the inner surface of the groove gradually increases toward the bottom in the height direction.

The shutter device may further include a fixing structure that fixes the front end shutter plate located at the front end in the gate depth direction to the cross beam in the height direction, or fixes adjacent shutter plates in the gate depth direction to each other in the height direction.

In the above-mentioned shutter device, the side pillar has a base, a tip portion disposed on the top of the base, and a split joint structure that connects the base and the tip portion in a separable manner, and a support structure that supports the cross beam is provided on both the base and the tip portion, and when the front end shutter plate and the cross beam are fixed by the fixing structure, or when a state in which at least two of the shutter plates adjacent to each other in the gate depth direction are fixed to each other is referred to as a fixed state, the difference in the heightwise position of the lower end of the shutter body in the closed position between the fixed state and an unfixed state in which the fixing structure is not used may correspond to the heightwise dimension of the tip portion.

The shutter device according to the above aspect has high strength and is easy to install.

1 is an overall front view of a shutter device according to an embodiment of the present invention. FIG. 2 is a side view of the shutter device, with the side pillars shown transparently for convenience's sake. FIG. 2 is a side view showing the shutter plate in the shutter device in a stored state, with the side pillar shown transparently for the sake of convenience. FIG. 4 is a cross-sectional view of the cross beam in the shutter device, taken along line IV-IV in FIG. 3. 2 is a cross-sectional view of a side pillar in the shutter device, taken along line VV of FIG. 1. 1 is a view of the cross beam in the shutter device from the rear (rear side). FIG. FIG. 11 is an overall front view of a shutter device according to a first modified example of an embodiment of the present invention. FIG. 11 is a side view of a shutter device according to a second modified example of the embodiment of the present invention.

The following describes an embodiment of the present invention with reference to the accompanying drawings. The shutter device 100 is a device for closing and opening passageways in a factory, etc.

(Overall composition)
1, the shutter device 100 includes a gate-shaped support pillar 1, a shutter body 2 attached to the support pillar 1, a drive unit 3 for moving the shutter body 2 in the height direction, and a guide member 4 attached to the support pillar 1 for guiding the shutter body 2 in the height direction. Note that, as described later, the guide member 4 is not a required component.

(Support)
The support 1 has a side post 10 that is installed on the floor surface and extends in the height direction, and a cross beam 11 that is supported by the side post 10.

(cross beam)
The cross beams 11 are disposed above the floor surface and extend in the horizontal direction, crossing the height direction. In this embodiment, multiple (two) cross beams 11 are connected in a separable manner in the gate width direction. Since these cross beams 11 have the same configuration, one of the cross beams 11 will be described below as a representative.

As shown in Figures 2 and 3, a storage space S is formed inside the cross beam 11 to store the shutter plates 20 described later. The cross beam 11 also has a downward opening 11a that connects the inside and outside of the storage space S. The opening 11a has a rectangular shape extending in the gate width direction so that the shutter plates 20 described later can pass through. Note that "storing the shutter plates 20" does not necessarily mean only when the entire shutter plates 20 described later are placed within the storage space S, but also when a portion of each shutter plate 20 is placed within the storage space S.

In addition, in the gate depth direction, which intersects with the height direction and gate width direction, rectangular openings 11b are formed on the front and back sides of the cross beam 11 so that the shutter plate 20, which will be described later, can be seen (see Figure 1).

4, the inner surface 11d of the cross beam 11 facing the gate width direction is provided with a guide rail portion 12 that protrudes in the gate width direction in the storage space S and extends in the height direction. The guide rail portion 12 is engaged with the shutter plate 20 on the front side, which will be described later, and the shutter plate 20 is guided in the height direction by the guide rail portion 12. The guide rail portion 12 may be formed integrally with the cross beam 11 or may be a separate member attached to the inner surface 11d of the cross beam 11. Note that a plurality of guide rail portions 12 are provided at intervals in the gate depth direction, and the shutter plates 20 other than the shutter plate 20 on the front side may also be engaged with the corresponding guide rail portion 12.
Further, on the inside of the cross beam 11, there is provided an inner bottom surface 11e facing upward below the guide rail portion 12, and a top surface 11f facing downward above the guide rail portion 12 (see FIG. 2).

(side pillar)
Returning to Fig. 1, a pair of side posts 10 are provided with a gap in the gate width direction. Each side post 10 is connected to the cross beam 11 at the end of the cross beam 11 in the gate width direction by a support structure 14 including bolts (fasteners) and bolt holes, etc., and supports the cross beam 11 from below.

Each side pillar 10 can be divided into multiple parts (two in this embodiment) in the height direction. Specifically, the side pillar 10 has a base 16 erected on the floor surface, a tip 17 placed on the top of the base 16, and a split joint structure 18 that connects the base 16 and tip 17 in a separable manner. Detailed illustration of the split joint structure 18 is omitted, but it is composed of bolts, spacers, and bolt holes. The split joint structure 18 also functions as the support structure 14, and the top of the base 16 can be directly connected to the cross beam 11 by the split joint structure 18.

The division positions of the side posts 10 will be described in detail later, but in this embodiment, they correspond to the height dimension of one shutter plate 20. As shown in FIG. 5, each side post 10 has a U-shape in cross section perpendicular to the height direction. That is, the side posts 10 are formed with a groove 10a that is recessed toward the outside in the gate width direction and extends in the height direction. The end of the shutter plate 20 in the gate width direction, which will be described later, is located inside this groove 10a.

(Drive unit)
Returning to Fig. 1, the drive device 3 is provided on the cross beam 11. As shown in Fig. 2 and Fig. 3, the drive device 3 has a case 30, a drive source 31 housed in the case 30, and a transmission mechanism 32 that connects the drive source 31 to a shutter plate 20, which will be described later.

The case 30 extends along the cross beams 11 in the gate width direction and is provided between multiple (two) cross beams 11 at the top of the cross beams 11. The case 30 also has an inspection lid 30a on the surface facing the front in the gate depth direction to allow access to the inside of the case 30 (see Figure 1). The inspection lids 30a are provided close to both ends of the case 30 in the gate width direction, one at a time.

The driving source 31 is, for example, an electric motor or the like, and has a rotating shaft 31a that rotates about an axis extending in the gate width direction. Only one driving source 31 is provided, for example, at a position close to one end of the case 30 in the gate width direction.
In this embodiment, the transmission mechanism 32 has a pulley 32a provided on a rotating shaft 31a of the driving source 31 in the case 30, and a belt 32b provided on the pulley 32a and extending downward from the inside to the outside of the case 30. The belt 32b passes through the accommodation space S of the cross beam 11 and extends to below the cross beam 11. The belt 32b enables the driving source 31 to wind up and unwind the shutter plate 20 described below via the pulley 32a. Note that the transmission mechanism 32 is not limited to being configured by the pulley 32a and the belt 32b, and may be configured by, for example, gears and a chain.

The drive source 31 is provided with a limiter (not shown). This limiter allows the shutter plate 20, which will be described later, to be set to a predetermined position.

(Shutter body)
Returning to Fig. 1, the shutter body 2 has a plurality (five in this embodiment) of shutter plates 20. The shutter bodies 2 are provided on a plurality (two) of cross beams 11 connected in the gate width direction, and have the same configuration, so one of the shutter bodies 2 will be described as a representative. When the plurality (two) of cross beams 11 are connected in the gate width direction, the shutter bodies 2 provided on each cross beam 11 are also connected in the gate width direction (see Fig. 4).

As shown in Figures 2 and 3, the multiple shutter plates 20 are lined up in the gate depth direction from the front to the back. The multiple shutter plates 20 are arranged with a slight gap between them in the gate depth direction so that they do not come into contact with each other. In this embodiment, the multiple shutter plates 20 have the same height dimension. Each shutter plate 20 is made of metal, but may be made of a material such as resin that is not easily bent and has a certain degree of strength.

As shown in FIG. 2, when the multiple shutter plates 20 are arranged in the closed position to close the closed area A surrounded by the cross beam 11 and the pair of side posts 10, the lower ends 20a of the multiple shutter plates 20 are arranged at positions offset in the height direction when viewed from the gate depth direction. In other words, the lower ends 20a of the shutter plates 20 are arranged successively lower from the shutter plate 20 on the front side to the shutter plate 20 on the back side.

In addition, in this embodiment, when in the closed position, the upper end 20b of the shutter plate 20 adjacent to the rear side is positioned between the lower end 20a and the upper end 20b of the shutter plate 20 adjacent to the rear side in the gate depth direction, so that no gap is formed between the shutter plates 20 when viewed from the gate depth direction.

In addition, a connection portion 21 (e.g., a belt roller) to which the belt 32b of the transmission mechanism 32 is connected is provided at the top of the rear end shutter plate 20X, which is located at the innermost side in the gate depth direction (the rightmost side as viewed in FIG. 2) among the multiple shutter plates 20. In this way, in this embodiment, only the rear end shutter plate 20X is connected to the belt 32b and is pulled upward.

The shutter plates 20 are supported so that they can move relative to each other in the height direction. As a specific structure, as shown in FIG. 4, one end of each shutter plate 20 in the gate width direction that is closest to the side post 10 is provided with a guide rail portion 22 that extends in the height direction on the back surface of the shutter plate 20 (the surface facing the back side in the gate depth direction). The guide rail portion 22 is L-shaped in a cross section perpendicular to the height direction. In other words, the guide rail portion 22 protrudes from the back surface of the shutter plate 20 to the back side, and then bends or curves toward the inside in the gate width direction. The guide rail portion 22 may be formed integrally with the shutter plate 20, or may be a separate member attached to the shutter plate 20.

A guided portion 23 is provided on the surface of each shutter plate 20 (the surface facing the front in the gate depth direction) at a position near and above one of the ends of each shutter plate 20 in the gate width direction that is closest to the side post 10. The guided portion 23 is L-shaped in a cross section perpendicular to the height direction. In other words, the guided portion 23 protrudes from the surface of the shutter plate 20 to the front side, and then bends or curves and extends outward in the gate width direction.

The guided portion 23 fits into and engages with the guide rail portion 22 of the shutter plate 20 adjacent in the gate depth direction, and is guided in the height direction by the guide rail portion 22. Here, the guided portion 23 provided on the front end shutter plate 20Y arranged on the frontmost side in the gate depth direction is guided by engaging with the guide rail portion 12 in the cross beam 11. As described above, if multiple guide rail portions 12 are provided, each shutter plate 20 corresponding to these guide rail portions 12 is guided by engaging with the guide rail portion 12. The guided portion 23 may be formed integrally with the shutter plate 20, or may be a separate member attached to the shutter plate 20.

Returning to FIG. 2, each shutter plate 20 is provided with an upper plate 24 that protrudes from the back surface of the shutter plate 20 to cover the upper part of the shutter plate 20 and has a top surface 24a facing downward. Each shutter plate 20 is also provided with a lower plate 25 that protrudes from the back surface of the shutter plate 20 to cover the lower part of the shutter plate 20 and has a bottom surface 25a facing upward. These upper and lower plates 24 and 25 are provided integrally with the shutter plate 20. When the shutter plate 20 is placed in the closed position (the state shown in FIG. 2), the guided portion 23 of the shutter plate 20 contacts and engages with the bottom surface 25a of the shutter plate 20 adjacent to the front side in the gate depth direction from above and is locked in the height direction. The guided portion 23 of the front end shutter plate 20Y contacts and engages with the inner bottom surface 11e of the cross beam 11 from above.

When the rear end shutter plate 20X is pulled up by the belt 32b, the shutter plates 20 are positioned in the open position to open the closed area A, as shown in FIG.
In the open position shown in Fig. 3, the guided portion 23 of the shutter plate 20 contacts and engages with the top surface 24a of the adjacent shutter plate 20 on the near side in the gate depth direction from below, and is locked in the height direction. The guided portion 23 of the front end shutter plate 20Y contacts and engages with the top surface 11f of the cross beam 11 from below (see Fig. 2 for each reference symbol).

When the shutter plates 20 are placed in the open position shown in FIG. 3, all of the shutter plates 20 are accommodated in the accommodation space S of the cross beam 11. At this time, the lower ends 20a of the shutter plates 20 are arranged stepwise downward from the front side to the back side as viewed from the gate depth direction. More specifically, in the open position, the lower end 20a of the back end shutter plate 20X is arranged at approximately the same height position as the lower end of the cross beam 11 or slightly higher, and the other shutter plates 20 are arranged higher than the lower end of the cross beam 11. In this embodiment, the multiple shutter plates 20 have the same dimensions in the height direction, so that in the open position, the upper end 20b (see FIG. 2) of the shutter plate 20 is arranged between the upper end 20b and the lower end 20a of the shutter plate 20 adjacent to the front side in the gate depth direction.

(Fixed structure)
Here, only the front end shutter plate 20Y of the multiple shutter plates 20 can be fixed in the height direction to the cross beam 11 by a fixing structure 5 provided on the cross beam 11. Specifically, the fixing structure 5 has a support lever 50 supported on the upper back surface of the cross beam 11, and a bolt and a bolt hole (not shown) for fixing the front end shutter plate 20Y to the support lever 50 as shown in FIG. 6. One end of the support lever 50 is supported on the cross beam 11 so as to be rotatable around an axis extending in the gate depth direction. When the fixing structure 5 is not in use, the other end of the support lever 50 is fixed to the upper part of the cross beam 11 by a bolt (not shown) and arranged to extend in the gate width direction, and when the fixing structure 5 is in use, the support lever 50 is rotated so that the other end is arranged below one end of the support lever 50. When the fixing structure 5 is in use, the front end shutter plate 20Y is arranged in the storage space S and is fixed to the other end of the support lever 50.

When the front end shutter plate 20Y is fixed to the cross beam 11 by the fixing structure 5, the position of the lower end 20a of the rear end shutter plate 20X moves upward when the shutter plate 20 is placed in the open position, making it possible to adjust the height position of the lower end of the shutter body 2 in the open position.

Here, the state in which the front end shutter plate 20Y is fixed to the cross beam 11 using the fixing structure 5 is referred to as the fixed state, and the state in which the front end shutter plate 20Y is not fixed to the cross beam 11 without using the fixing structure 5 is referred to as the non-fixed state. In this embodiment, the height dimension of the tip 17 of the side post 10 corresponds to the difference in the height direction position of the lower end of the shutter body 2 in the open position between the fixed state and the non-fixed state. Therefore, as shown in FIG. 7, in the fixed state in which the front end shutter plate 20Y is fixed to the cross beam 11 using the fixing structure 5, the cross beam 11 can be directly connected to the base 16 of the side post 10 to adjust the height dimension of the shutter device 100.

(Guide member)
Returning to Fig. 5, the guide member 4 is provided inside the groove 10a formed in the side post 10. More specifically, the guide member 4 is provided to protrude from a groove inner surface 10x that constitutes the groove 10a of the side post 10 and faces the rear side in the gate depth direction.

Returning to FIG. 2, in this embodiment, the guide member 4 has a plurality of guide plates 40 that are detachably attached to the groove inner surface 10x at intervals in the height direction. Each guide plate 40 has a triangular shape whose width in the height direction gradually decreases toward the back side in the gate depth direction. That is, each guide plate 40 has an inclined shape with an inclined surface 40b so that the amount of protrusion from the groove inner surface 10x gradually increases as it goes downward (see FIG. 3). In these guide plates 40, the maximum amount of protrusion in the gate depth direction from the groove inner surface 10x increases sequentially from the guide plate 40 provided at the top to the guide plate 40 provided at the bottom. The tip end (the apex of the triangle) on the back side in the gate depth direction of each guide plate 40 faces the surface of each shutter plate 20 arranged in the closed position one by one. The tip of each guide plate 40 is a guide surface 40a, and in the closed position, the guide surface 40a is positioned with a small gap between it and the surface of the corresponding shutter plate 20, or is in contact with it, allowing the shutter plate 20 to be positioned in the depth direction of the gate and guided in the height direction.

(How to install the shutter device)
Next, a brief description will be given of a method for installing the shutter device 100. First, the side pillar 10 is erected at a target position where the shutter device 100 is to be installed. The base 16 and the tip 17 may be joined before the side pillar 10 is provided at the target position, or the tip 17 may be joined to the base 16 after the base 16 is provided at the target position.

Then, the guide member 4 is attached to the groove 10a of the side post 10. The guide member 4 may be attached to the side post 10 before the side post 10 is placed at the target position.

Next, with all the shutter plates 20 accommodated in the accommodation space S of the cross beam 11 and with the belt 32b of the transmission mechanism 32 connected to the rear end shutter plate 20X, the cross beam 11 is connected to the upper part of the tip 17 of the side post 10 by the support structure 14. Note that, when the shutter device 100 is installed by fixing the front end shutter plate 20Y to the cross beam 11 by the fixing structure 5 as in the case shown in FIG. 7, the tip 17 of the side post 10 is not installed and the cross beam 11 is connected to the base 16. Note that when the state shown in FIG. 7 is achieved, it is necessary to adjust the amount of protrusion of the guide plate 40 from the groove inner surface 10x, so the arrangement of the guide plate 40 is different from that in the case shown in FIG. 1.

(Action and Effect)
According to the shutter device 100 of the present embodiment described above, the shutter body 2 that closes and opens the closed area A surrounded by the gate-shaped support pillars 1 is composed of a plurality of shutter plates 20. Therefore, the shutter body 2 is not easily bent or deformed, and has high strength.

In addition, by arranging the multiple shutter plates 20 at positions that are sequentially offset in the depth direction, when the shutter body 2 is brought to the target location where the shutter device 100 is to be installed, it can be carried compactly in the height direction, making installation of the shutter device 100 extremely easy. In particular, in this embodiment, the shutter plates 20 can be stored in the storage space S of the cross beam 11, making installation of the shutter device 100 even easier. In addition, even if it becomes necessary to replace the shutter plates 20 due to damage, deterioration, etc., the replacement work is easy.

Furthermore, the shutter plates 20 are supported by the guide rail portion 22 and the guided portion 23 so that they can move relative to each other in the height direction. Then, by simply connecting only the rear end shutter plate 20X to the transmission mechanism 32, all the shutter plates 20 can be pulled downward to the closed position, or pulled upward to the open position. This makes the structure very simple, and the shutter device 100 is easy to install.

In addition, because the end of the shutter plate 20 in the gate width direction is positioned within the groove 10a of the side post 10, no gap is formed between the side post 10 and the shutter plate 20 when viewed from the gate depth direction, and the closed area A can be closed reliably. In addition, in the closed position, the upper end 20b of the shutter plate 20 adjacent to the rear side is positioned between the lower end 20a and upper end 20b of the shutter plate 20, so no gap is formed between the shutter plates 20 in the height direction, and the closed area A can be closed reliably.

The side pillar 10 is also provided with a guide member 4. This allows the shutter plate 20 to move smoothly between the open and closed positions while minimizing wobble. Furthermore, the guide member 4 prevents the shutter plate 20 from wobbling in the gate depth direction when in the closed position, allowing the shutter plate 20 to be stably positioned in the closed position.

In this embodiment, the guide member 4 has multiple guide plates 40 that can be attached and detached to the side posts 10. Therefore, by appropriately changing the dimensions and shape of the guide plates 40, the amount of protrusion of the guide member 4 in the gate depth direction can be easily adjusted according to the position of the surface of each shutter plate 20 in the gate depth direction, and the guide member 4 can also be easily replaced.

In addition, each guide plate 40 has a triangular shape. Therefore, the height dimension of the guide plate 40 can be secured at the attachment portion of the guide plate 40 to the groove inner surface 10x of the side column 10, and the attachment to the groove inner surface 10x is not impaired. Moreover, even if the guide surface 40a of the guide plate 40 contacts the surface of the shutter plate 20, the contact area between the shutter plate 20 and the guide plate 40 can be reduced, and wear and scratches on the surface of the shutter plate can be suppressed. Furthermore, since the guide plate 40 has an inclined surface 40b, the inclined surface 40b can guide the surface of the shutter plate 20 in the height direction while pushing it toward the back, and the shutter plate 20 can be operated more smoothly while suppressing rattling.

In addition, the front end shutter plate 20Y can be fixed to the cross beam 11 by the fixing structure 5, so that the position of the lower end of the shutter body 2 can be easily adjusted. Furthermore, since the side pillar 10 has a split joint structure 18, if it is desired to reduce the height dimension of the shutter device 100 and the closed area A, the side pillar 10 can be easily split to shorten the side pillar 10, and the height specification of the shutter device 100 can be easily changed. In particular, in this embodiment, the height dimension of the tip 17 of the side pillar 10 corresponds to the difference in height between the fixed state using the fixing structure 5 and the non-fixed state not using the fixing structure 5, at the closed position, at the lower end position of the shutter body 2. Therefore, if the tip 17 is separated from the base 16 in the fixed state using the fixing structure 5, the height of the shutter device 100 can be changed to a smaller value, and the entire closed area A can be closed by the shutter body 2 in the closed position.

The above describes the embodiments of the present invention in detail with reference to the drawings. However, the configurations and combinations thereof in the above embodiments are merely examples, and additions, omissions, substitutions, and other modifications of the configurations are possible without departing from the spirit of the present invention. Furthermore, the present invention is not limited to the embodiments, but is limited only by the claims.

For example, the height dimensions of the multiple shutter plates 20 may be different from each other. Furthermore, the positions of the lower ends 20a of the shutter plates 20 in the open position and the closed position are not particularly limited. For example, in the open position, the lower ends 20a may be disposed at the same height position. In other words, it is sufficient that the lower ends 20a of the shutter plates 20 are closer to each other in the height direction at least in the open position compared to the closed position.

A guide rail portion 22 may be provided on one of the shutter plates 20 adjacent in the gate depth direction, and a guided portion 23 may be provided on the other. Furthermore, the top surface 24a and bottom surface 25a on which the guided portion 23 is engaged in the height direction may be provided on the guide rail portion 22 itself, and there are no particular limitations on the installation position.

Furthermore, the multiple shutter plates 20 do not necessarily have to be housed in the cross beam 11 .
Further, the shutter body 2 is not limited to being operated using the driving source 31, but may be operated manually.

The shape of the guide member 4 is not particularly limited.

The fixing structure 5 may also be provided between adjacent shutter plates 20 in the gate depth direction. In this case, by fixing two adjacent shutter plates 20 in the gate depth direction to each other in the height direction, it is possible to adjust the height position of the lower end of the shutter body 2. Three or more shutter plates 20 may also be fixed to each other by the fixing structure 5.

Furthermore, the side pillar 10 is not limited to being divided into two parts, the base part 16 and the tip part 17, but may be further divided into multiple parts.

The drive unit 3 is not limited to being mounted on the cross beam 11, but may be mounted on the side pillar 10, for example, to operate the shutter body 2 from the gate width direction.

The cross beam 11 and the shutter body 2 do not necessarily have to be connected in a manner that allows multiple pieces (two pieces) to be separated in the gate width direction, and each may be provided one by one in the gate width direction.

Also, as shown in FIG. 8, in the shutter device 200, the case 30 of the drive device 3 may be provided on the side of the cross beam 11, i.e., on the near side (or the far side) in the gate depth direction. In this case, for example, a second pulley 32c is provided above the shutter body 2 in the storage space S. The belt 32b is then arranged to extend from the case 30 toward the second pulley 32c in the gate depth direction, and then extend downward from the second pulley 32c, and is connected to the far end shutter plate 20X.

The shutter device of the present invention has high strength and is easy to install.

1 Support 2 Shutter body 3 Drive device 4 Guide member 5 Fixing structure 10 Side post 10a Groove 10x Groove inner surface 11 Cross beam 11a Opening 12 Guide rail portion 13 Connecting member 14 Support structure 16 Base 17 Tip portion 18 Split connecting structure 20 Shutter plate 20X Back end shutter plate 20Y Front end shutter plate 20a Lower end 20b Upper end 22 Guide rail portion 23 Guided portion 30 Case 31 Drive source 32 Transmission mechanism 40 Guide plate 40a Guide surface 100, 200 Shutter device A Closing area S Storage space

Claims (7)

A gate-shaped support pillar is formed by a pair of side pillars extending in a height direction and a cross beam supported by the pair of side pillars and extending in a gate width direction intersecting the height direction;
a shutter body disposed in a closed area surrounded by the cross beam and the pair of side posts;
A drive device that moves the shutter body in the height direction;
Equipped with
The shutter body has a plurality of shutter plates that are aligned toward one side of a gate depth direction intersecting the height direction and the gate width direction and are supported so as to be movable relative to each other in the height direction,
When the shutter plate is disposed at a closed position for closing the closed area, the lower ends of the plurality of shutter plates are sequentially disposed downward toward one side in the gate depth direction,
When the shutter plate is disposed at an open position that opens the closed area, the lower ends of the plurality of shutter plates are closer to each other in the height direction than when the shutter plate is disposed at the closed position ,
The side pillar is provided with a guide surface that faces the plurality of shutter plates in the gate depth direction and guides the shutter plates in the height direction,
The side pillar has a groove in which at least ends of the shutter plates in the gate width direction are arranged and which extends in the height direction,
The groove further includes a guide member that protrudes in the gate depth direction from an inner surface of the groove that faces one side in the gate depth direction and that constitutes the guide surface,
The guide member has a gradually increasing protrusion amount from the inner surface of the groove in the gate depth direction from the upper portion to the lower portion,
the guide member has a plurality of guide plates provided on the inner surface of the groove at intervals in the height direction,
A shutter device in which the maximum amount of protrusion from the inner surface of the groove in the gate depth direction increases successively from the guide plate provided at the top to the guide plate provided at the bottom . The shutter device according to claim 1, wherein in the closed position, the upper end of the rear shutter plate is disposed between the lower end and upper end of the front shutter plate in the gate depth direction out of the two shutter plates adjacent in the gate depth direction. The shutter device according to claim 1 or 2, wherein the cross beam has a storage space capable of storing multiple shutter plates inside, and a downward opening that connects the inside and outside of the storage space and allows the shutter plates to pass through. The drive device is
A transmission mechanism that is connected to a rear end shutter plate that is arranged on the innermost side in one of the gate depth directions among the plurality of shutter plates and extends in the height direction;
a drive source disposed above the plurality of shutter plates and configured to move the rear end shutter plate in the height direction through the transmission mechanism;
The shutter device according to claim 1 , further comprising: One of the two shutter plates adjacent in the gate depth direction is provided with a guide rail portion that guides the other in the height direction,
A shutter device as described in any one of claims 1 to 4, wherein in the closed position, the lower of the two shutter plates adjacent to each other in the gate depth direction engages in the height direction with the lower part of the upper shutter plate. The shutter device according to claim 1 , wherein each of the guide plates has an inclined shape such that an amount of protrusion from the inner surface of the groove gradually increases downward in the height direction. A gate-shaped support pillar is formed by a pair of side pillars extending in a height direction and a cross beam supported by the pair of side pillars and extending in a gate width direction intersecting the height direction;
a shutter body disposed in a closed area surrounded by the cross beam and the pair of side posts;
A drive device that moves the shutter body in the height direction;
Equipped with
The shutter body has a plurality of shutter plates that are aligned toward one side of a gate depth direction intersecting the height direction and the gate width direction and are supported so as to be movable relative to each other in the height direction,
When the shutter plate is disposed at a closed position for closing the closed area, the lower ends of the plurality of shutter plates are sequentially disposed downward toward one side in the gate depth direction,
When the shutter plate is disposed at an open position that opens the closed area, the lower ends of the plurality of shutter plates are closer to each other in the height direction than when the shutter plate is disposed at the closed position,
Among the plurality of shutter plates, a front end side shutter plate arranged on one side of the gate depth direction is fixed to the cross beam in the height direction, or a fixing structure is further provided that fixes the shutter plates adjacent to each other in the gate depth direction in the height direction,
The side pillar is
A base and
a tip portion disposed on top of the base portion;
a split joint structure that splits the base and the tip;
having
A support structure for supporting the cross beam is provided at both the base and the tip,
When the front end shutter plate and the cross beam are fixed by the fixing structure, or when at least two of the shutter plates adjacent to each other in the gate depth direction are fixed to each other in a fixed state,
A shutter device in which the difference in the heightwise position of the lower end of the shutter body in the closed position between the fixed state and an unfixed state in which the fixing structure is not used corresponds to the heightwise dimension of the tip portion.

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