Sheet shutter and shutter device

Abstract

To improve mounting accuracy of a guide block with respect to a sheet end part, while maintaining flexibility of a sheet shutter.SOLUTION: In a sheet shutter 10, an opening part 2 can be opened / closed by being guided by left and right guide rails 14 raised on both end parts in the width direction of the opening part 2 of a building. The sheet shutter includes: a sheet 32 which has width extending across the guide rails 14, and in which a hollow part 32A is provided extending in the height direction of the opening part 2 at a sheet end part 32B in the width direction guided by the guide rails 14; a thin plate 36 which is provided in the hollow part 32A, which extends in the height direction, and in which a plurality of through-holes 36A is formed having a predetermined pitch P; and a plurality of guide blocks 41 mounted along the height direction at the sheet end part 32B, and fastened using the through-hole 36A at the thin plate 36 respectively.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a sheet shutter and a shutter device. [Background technology]

[0002] A sheet shutter is disclosed in which guide blocks are attached to both ends of the sheet (see Patent Document 1). The guide blocks are guided by guide rails. The guide rails are provided with anti-slip guides to prevent the guide rails from slipping out of the guide grooves. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-89419 A Summary of the Invention [Problem to be solved by the invention]

[0004] Here, we consider a structure in which the above-mentioned guide block engages with a sprocket for winding up the sheet shutter. As a means for fixing this guide block to the sheet end, it is conceivable to arrange a wire rope that extends in the opening and closing direction of the sheet shutter inside the sheet end of the sheet shutter, and fasten the guide block to the sheet end by tightening a tapping screw between the strands of the wire rope.

[0005] However, the way in which the tapping screws are inserted varies depending on the state of the twisted wire when fixing the guide block, which may result in misalignment or twisting of the fastening position of the guide block at the end of the sheet.

[0006] An object of the present invention is to improve the accuracy of mounting a guide block to an end of a sheet while maintaining the flexibility of the sheet shutter. [Means for solving the problem]

[0007] The sheet shutter of the first aspect is a sheet shutter that is guided by left and right guide rails that are erected at both widthwise ends of an opening in a building and can open and close the opening, and comprises a sheet that has a width extending between the guide rails and has a hollow portion extending in the height direction of the opening at the widthwise end of the sheet guided by the guide rails, a flexible thin plate that is provided within the hollow portion, extends in the height direction and has a plurality of through holes formed at a predetermined pitch, and a plurality of guide blocks that are attached along the height direction at the end of the sheet, and are each fastened to the thin plate using the through holes.

[0008] In this sheet shutter, a thin plate is provided in a hollow portion at the end of the sheet, and a plurality of through holes are formed in the thin plate at a predetermined pitch. A plurality of guide blocks are provided along the height direction at the end of the sheet. Each guide block is fastened to the thin plate using the through hole. Therefore, the fastening position of the guide block is unlikely to shift or twist at the end of the sheet. In addition, the thin plate is flexible. Therefore, it is possible to improve the attachment accuracy of the guide block to the end of the sheet while maintaining the flexibility of the sheet shutter.

[0009] The sheet shutter of the second embodiment is a sheet shutter that is guided by left and right guide rails that are erected at both widthwise ends of an opening in a building and is capable of opening and closing the opening, and comprises a sheet that has a width extending between the guide rails and has a hollow portion extending in the height direction of the opening at the widthwise end of the sheet guided by the guide rails, a ball chain that is provided within the hollow portion, extends in the height direction, and is made up of wires arranged in series and connected to each other by spherical joints, and a plurality of guide blocks are attached along the height direction at the end of the sheet, and each is fastened to the joint in the ball chain.

[0010] In this sheet shutter, a ball chain is provided in a hollow portion at the end of the sheet. A plurality of guide blocks are provided along the height direction at the end of the sheet. Each guide block is fastened to a joint of the ball chain. Therefore, the fastening position of the guide block is unlikely to shift or twist at the end of the sheet. In addition, the ball chain is flexible. Therefore, it is possible to improve the attachment accuracy of the guide block to the end of the sheet while maintaining the flexibility of the sheet shutter.

[0011] The sheet shutter of the third aspect is a sheet shutter that is guided by left and right guide rails erected at both widthwise ends of an opening in a building and is capable of opening and closing the opening, and comprises a sheet having a width extending between the guide rails and a hollow portion extending in the height direction of the opening at the widthwise sheet end guided by the guide rails, a flexible mesh sheet that is provided within the hollow portion and extends in the height direction, and multiple guide blocks are attached at the sheet ends along the height direction and are each fastened to the mesh sheet.

[0012] In this sheet shutter, a mesh sheet is provided in a hollow portion at the end of the sheet. A plurality of guide blocks are provided along the height direction at the end of the sheet. Each guide block is fastened to the mesh sheet. Therefore, the fastening position of the guide blocks is unlikely to shift or twist at the end of the sheet. In addition, the mesh sheet is flexible. Therefore, it is possible to improve the attachment accuracy of the guide blocks to the end of the sheet while maintaining the flexibility of the sheet shutter.

[0013] The sheet shutter of the fourth aspect is a sheet shutter that is guided by left and right guide rails that are erected at both widthwise ends of an opening in a building and is capable of opening and closing the opening, and comprises a sheet that has a width extending between the guide rails and has a hollow portion extending in the height direction of the opening at the widthwise end of the sheet guided by the guide rails, a resin bead that is provided within the hollow portion, extends in the height direction, is flexible, and has a portion where the widthwise dimension of the sheet is greater than the thickness direction dimension of the sheet, and a plurality of guide blocks are attached along the height direction at the end of the sheet, and each guide block is fastened to the bead using a screw that is screwed in from the outside of the sheet width direction toward the inside.

[0014] In this sheet shutter, a flexible resin bead is provided in a hollow portion at the end of the sheet. A plurality of guide blocks are provided along the height direction at the end of the sheet. Each guide block is fastened to the resin bead using a screw that is screwed from the outside to the inside in the width direction of the sheet. Therefore, the fastening position of the guide block is unlikely to shift or twist at the end of the sheet. In addition, because the bead is flexible, the attachment accuracy of the guide block to the end of the sheet can be improved while maintaining the flexibility of the sheet shutter.

[0015] Furthermore, since the bead has a portion where the dimension in the width direction of the sheet is larger than the dimension in the thickness direction of the sheet, the length of the screw fastening portion can be secured to be greater than when the dimension in the width direction of the sheet of the bead is equal to the dimension in the thickness direction of the sheet. Therefore, the cross-sectional strength of the sheet shutter in the height direction at the attachment portion of the guide block can be secured. Also, since the bead and the guide block are fitted together, the sheet is less likely to come off the guide block.

[0016] In a fifth aspect, in the sheet shutter of the fourth aspect, a groove is formed at the widthwise outer end of the sheet in the bead, extending along the longitudinal direction of the bead and guiding the screw when the screw is screwed in.

[0017] In this sheet shutter, the screw is guided into a groove formed in the bead and screwed into the bead, so that the variation in the angle of the screw relative to the bead can be further suppressed.

[0018] The sixth aspect is a sheet shutter that is guided by left and right guide rails erected at both widthwise ends of an opening in a building and can open and close the opening, and includes a gear member arranged on the upper side of the opening, a sheet that can open and close the opening by moving in an up and down direction, a timing belt that is arranged on both side ends of the sheet along the movement direction of the sheet, engages with the gear member, and moves in the up and down direction as the gear member rotates forward and backward, and a mesh material that is arranged inside the timing belt along the movement direction and has a plurality of wire members that cross each other.

[0019] In this sheet shutter, the sheet can open and close the opening by moving up and down. The sheet moves up and down by, for example, forward and reverse rotation of a gear member arranged above the opening, transmitting a driving force via a timing belt that meshes with the gear member. This allows the sheet to open and close the opening.

[0020] In addition, in this configuration, a mesh material having a plurality of mutually intersecting wires is provided inside the timing belt along the direction of seat movement, which makes the timing belt less likely to deform in the direction of seat movement and maintains the pitch precision of the unevenness of the timing belt.

[0021] In this configuration, for example, when manufacturing a timing belt using a mold, a mesh material having multiple intersecting wires can be placed inside the mold, thereby reducing the number of steps in manufacturing the sheet curtain compared to a configuration that requires multiple wires to be arranged in parallel during manufacturing.

[0022] In a seventh aspect, in the sheet shutter according to the sixth aspect, the plurality of wire members of the mesh material are inclined with respect to the movement direction when viewed in the thickness direction of the sheet.

[0023] In this sheet shutter, the multiple wires of the mesh material are inclined with respect to the direction of sheet movement when viewed in the thickness direction of the sheet, so that the timing belt can be reinforced in the direction of sheet movement, the width direction and the thickness direction of the sheet compared to when a mesh material is used that has wires aligned along the direction of sheet movement and wires aligned along the width direction of the sheet.

[0024] A shutter device according to an eighth aspect has the sheet shutter according to any one of the first to seventh aspects.

[0025] In this shutter device, the mounting accuracy of the guide block to the sheet end of the sheet shutter is improved, so the sliding resistance between the guide block and the guide rail is reduced. Also, the meshing efficiency between the sprocket and the guide block when rolling up the sheet shutter is improved. This makes it possible to reduce noise levels, maintenance costs, and extend the life of the device. Effect of the Invention

[0026] According to the present invention, it is possible to improve the accuracy of mounting the guide block to the sheet end while maintaining the flexibility of the sheet shutter. [Brief description of the drawings]

[0027] [Figure 1] 1 is a perspective view showing a shutter device according to an embodiment of the present invention. [Diagram 2] 2 is a perspective view showing an overview of a winding device for a sheet shutter in a shutter device. FIG. [Diagram 3] FIG. 2 is a partially cutaway perspective view showing a main part of the sheet shutter according to the first embodiment. [Figure 4] FIG. 2 is an exploded perspective view showing a main part of the sheet shutter according to the first embodiment. [Diagram 5] FIG. 13 is a perspective view showing a modified example of the thin plate. [Figure 6] FIG. 4 is a cross-sectional view showing a guide block. [Figure 7] 4 is a cross-sectional view showing a state in which a guide block is disposed within a guide rail. FIG. [Figure 8] FIG. 11 is a partially cutaway perspective view showing a main part of a sheet shutter according to a second embodiment. [Figure 9] FIG. 11 is an exploded perspective view showing a main part of a sheet shutter according to a second embodiment. [Figure 10] FIG. 4 is a cross-sectional view showing a guide block. [Figure 11] 4 is a cross-sectional view showing a state in which a guide block is disposed within a guide rail. FIG. [Figure 12] FIG. 11 is a partially cutaway perspective view showing a main part of a sheet shutter according to a third embodiment. [Figure 13] FIG. 11 is an exploded perspective view showing a main part of a sheet shutter according to a third embodiment. [Figure 14] 4 is a cross-sectional view showing a state in which a guide block is disposed within a guide rail. FIG. [Figure 15] FIG. 11 is a cross-sectional view showing a main part of a sheet shutter according to a fourth embodiment. [Figure 16] FIG. [Figure 17] FIG. 13 is a perspective view showing the internal configuration of a side frame and a shutter case according to a fifth embodiment. [Figure 18] FIG. 13 is a perspective view showing a configuration of a timing belt according to a fifth embodiment. [Figure 19] FIG. 13 is a perspective view showing configurations of a timing belt, a gear member, and a contact block according to a fifth embodiment. [Figure 20] FIG. 13 is a side view showing the configurations of a timing belt, a gear member, and a contact block according to a fifth embodiment. [Figure 21] FIG. 11 is a perspective view showing a configuration of a timing belt according to a first modified example. [Figure 22] FIG. 4 is a cross-sectional view showing a configuration of a timing belt according to a first modified example. [Figure 23] FIG. 11 is a perspective view showing a modification of a timing belt according to a first modification. [Figure 24] FIG. 11 is a perspective view showing a configuration of a timing belt according to a second modified example. [Diagram 25] FIG. 11 is a perspective view showing a modified example of a timing belt according to a second modified example. [Figure 26] FIG. 13 is a cross-sectional view of a mold used in a method for producing a timing belt according to a fifth embodiment. [Figure 27] FIG. 13 is a perspective view showing a state in which a mesh material is placed in a die used in the method for producing a timing belt according to the fifth embodiment. [Figure 28] FIG. 13 is a perspective view showing a comparative example in which a wire is arranged in a die used in the method for producing a timing belt according to the fifth embodiment. [Figure 29] FIG. 13 is a perspective view of a mold used in another method for manufacturing the timing belt according to the fifth embodiment. [Diagram 30] FIG. 13 is a plan view of a mold used in another method for manufacturing a timing belt according to the fifth embodiment. [Diagram 31] FIG. 13 is a perspective view showing an intermediate product formed by another manufacturing method of the timing belt according to the fifth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that arrow H shown in the drawings indicates the up-down direction (vertical direction) of the shutter device 1, arrow W indicates the width direction (horizontal direction) of the shutter device 1, and arrow L indicates the depth direction (horizontal direction) of the shutter device 1. The direction indicated by arrow W in FIG. 1 will be described as the left side of the shutter device 1, and the opposite direction to the direction indicated by arrow W will be described as the right side of the shutter device 1. Also, the direction indicated by arrow L in FIG. 1 will be described as the rear of the shutter device 1, and the opposite direction to the direction indicated by arrow L will be described as the front of the shutter device 1.

[0029] In addition, the left-right direction of the shutter device 1 may be referred to as the "width direction," and the front-rear direction of the shutter device 1 may be referred to as the "shutter depth direction." Note that the above-mentioned left, right, front, and rear are directions defined for the convenience of explanation, and the configuration of the sheet shutter 10 is not limited to these directions.

[0030] (Overall composition) In Fig. 1 and Fig. 2, the shutter device 1 is an opening / closing device attached to an opening 2 of a building, and includes a frame 12, a winding roll 24, a sheet shutter 10, a driving roll 60, and a contact block 80. The frame 12, the winding roll 24, the sheet shutter 10, the driving roll 60, and the contact block 80 are basically symmetrical with respect to the center line CL of the shutter device 1 in the width direction of the shutter device 1 (hereinafter referred to as "width direction") when viewed from the front. The "width direction" also corresponds to the width direction of the opening 2. The opening 2 is, for example, an entrance to a room such as a freezer, a refrigerator, or a warehouse. In the following, closing the opening 2 may be referred to as "closing", and opening the opening 2 may be referred to as "opening".

[0031] The shutter device 1 may be applied to entrances and window openings of a building, and can be applied to an opening 2 that is opened and closed. The opening 2 to which the shutter device 1 is applied is specifically an opening that is formed in a side wall of a structure, etc., and opens in the lateral direction (side).

[0032] The shutter device 1 is configured symmetrically with respect to a center line CL in the width direction. That is, the shutter device 1 is configured symmetrically.

[0033] (Frame 12) The frame 12 includes a pair of side frames 22 and a shutter case 18. The pair of side frames 22 each extend in the up-down direction (hereinafter referred to as the "up-down direction") of the shutter device 1, and are disposed on both sides of an opening 2 such as a delivery entrance in the width direction, at both ends in the width direction of the sheet shutter 10. The "up-down direction" also corresponds to the height direction of the opening 2 and the height direction of the sheet 32 ​​when the opening 2 is closed.

[0034] The side frame 22 has a U-shape in cross section cut in a direction perpendicular to its longitudinal direction, with the inner side in the shutter width direction (i.e., the side approaching the center line CL of the shutter device 1 in the width direction) being open.

[0035] Furthermore, inside the pair of side frames 22, guide rails 14 (FIG. 2) extending in the vertical direction are respectively arranged. The pair of guide rails 14 guide the sheet shutter 10 in the vertical direction so that the sheet shutter 10 moves in the vertical direction. For example, in FIG. 7, a cross section of the guide rail 14 cut in a direction perpendicular to its longitudinal direction is substantially U-shaped with an opening on the inside in the width direction. The inside in the width direction is the side approaching the center line CL in the width direction of the shutter device 1 in FIG. 1. Furthermore, a pair of flanges 16 are formed on the inside part of the guide rail 14 in the width direction so as to narrow the opening width. The upper end of the guide rail 14 and the side frames 22 are open upward. Inside the guide rail 14, a guide block 41 (details of which will be described later) provided on the sheet shutter 10 is supported so as to be movable in the vertical direction.

[0036] As shown in FIG. 1, the shutter case 18 is arranged to extend in the width direction so as to connect the upper ends of the pair of side frames 22, and is formed in a box shape. A cross section of the shutter case 18 cut in a direction perpendicular to its longitudinal direction is a rectangular tube extending from above the side frames 22 to one side (the right side in the figure) in the depth direction of the shutter device 1 (hereinafter, "shutter depth direction"), and the inside of the shutter case 18 is hollow. The shutter case 18 protrudes forward relative to the pair of side frames 22. A rear surface 18B of the shutter case 18 is fixed to, for example, a wall surface (not shown) at the upper edge of the opening 2. The inside of the shutter case 18 communicates with the inside of the pair of side frames 22 and the inside of the pair of guide rails 14 through the openings at the upper ends of the pair of side frames 22 and the upper ends of the pair of guide rails 14.

[0037] (Winding roll 24) 2, the winding roll 24 is a roll that winds up the sheet shutter 10, and is disposed on one side in the shutter depth direction inside the shutter case 18. One end of the sheet shutter 10 is attached to the winding roll 24. This one end is the upper end when the sheet shutter 10 closes the opening 2 (hereinafter referred to as the "closed state").

[0038] The winding roll 24 extends in the width direction. In other words, the axial direction of the winding roll 24 is the width direction. Furthermore, the winding roll 24 is rotatably supported by a frame member (not shown). The winding roll 24 is biased by, for example, a biasing member (not shown) so as to rotate in a direction in which the sheet shutter 10 is wound up (hereinafter, the "winding direction"). In this configuration, a force in the winding direction is applied to the sheet shutter 10 by the winding roll 24.

[0039] (Drive roll 60) 2, the drive roll 60 is disposed inside the shutter case 18, at the other side in the shutter depth direction, and above the pair of guide rails 14. A part of the sheet shutter 10 that is wound by the winding roll 24 or unwound from the winding roll 24 is wound around the drive roll 60. The drive roll 60 is rotated in the forward and reverse directions by the driving force of a motor (not shown) being transmitted thereto.

[0040] The driving roll 60 extends in the width direction. In other words, the axial direction of the driving roll 60 is the width direction. Furthermore, the driving roll 60 is rotatably supported by a frame member (not shown). The driving roll 60 also includes a roll body 62 extending in the width direction, and a pair of gear members 64 attached to both ends of the roll body 62 in the width direction. The gear member 64 is made of metal, for example, and has a plurality of gear teeth 66 (see Figures 19 and 20) arranged in the circumferential direction and engaging with the guide block 41 of the sheet shutter 10.

[0041] (Contact block 80) 2, a pair of contact blocks 80 are provided, and are disposed at the other side in the shutter depth direction and at both end sides in the shutter width direction inside the shutter case 18. Specifically, the contact blocks 80 are disposed opposite the gear member 64 of the drive roll 60.

[0042] The contact block 80 is formed in an arc shape using a metal material (zinc die-cast in this embodiment) and is attached to a frame member (not shown). In this configuration, when the guide block 41 engaged with the gear member 64 moves outward in the gear radial direction, it comes into contact with the contact block 80, and further movement of the guide block 41 is suppressed. This maintains the engagement between the gear member 64 and the guide block 41.

[0043] [Sheet shutter 10 according to the first embodiment] 1 to 3, a sheet shutter 10 according to this embodiment is an opening / closing member used in a shutter device 1, and is disposed between a pair of side frames 22. The sheet shutter 10 is guided by left and right guide rails 14 erected at both ends in the width direction of an opening 2 of a building, and is capable of opening and closing the opening 2. The sheet shutter 10 has a sheet 32, a thin plate 36, and a guide block 41.

[0044] The sheet 32 ​​has a width extending between the left and right guide rails 14. A hollow portion 32A extending in the height direction of the opening 2 (the vertical direction of the shutter device 1) is provided at a sheet end portion 32B in the width direction guided by the guide rails 14.

[0045] The sheet 32 ​​is formed in a sheet shape with the depth direction of the shutter in the closed state being the thickness direction. The sheet 32 ​​is formed, for example, from a resin material, and has flexibility that allows it to be deformed into a roll along the outer periphery of the winding roll 24 to be wound up. Note that the material of the sheet 32 ​​is not limited to a resin material, and various materials can be used as long as the sheet 32 ​​has the flexibility. The sheet 32 ​​is formed in a rectangular shape extending in the moving direction of the sheet 32. The end of the sheet 32 ​​in the moving direction is attached to the winding roll 24 (FIGS. 1 and 2).

[0046] When wrapped around the drive roll 60, the sheet 32 ​​hangs down by its own weight to close the opening 2. In the closed state, the sheet 32 ​​is disposed between a pair of side frames 22 as shown in FIG.

[0047] Both end widthwise portions of the sheet 32 ​​are folded back. Furthermore, the tip of the folded back portion is joined to the other overlapping portion of the sheet 32 ​​by welding, fusion, adhesion, or the like. As a result, the sheet end portion 32B in the widthwise direction is formed into a cylindrical shape, and a hollow portion 32A is formed inside the cylindrical portion.

[0048] The thin plate 36 is provided in the hollow portion 32A of the sheet 32, extends in the height direction of the opening 2, has a plurality of through holes 36A formed at a predetermined pitch P, and is flexible. The thin plate 36 is made of, for example, spring steel, and has flexibility that allows it to be wound up in a circular shape by the winding roll 24. The thin plate 36 is not limited to a flat plate, and may be curved in an arc shape so as to have a center of curvature (not shown) on one side of the thickness direction (lower in the drawing) in a cross section perpendicular to the height direction of the opening 2, as in a modified example shown in FIG. 5. By forming it in this way, smooth winding by the winding roll 24 is possible, and the shape of the thin plate 36 is easily maintained in a linear shape when unwound. In order to make the thin plate 36 windable, the center of the winding roll 24 is set on the side of the center of curvature in the thickness direction of the thin plate 36. As a result, the curvature of the thin plate 36 decreases (the radius of curvature increases) during winding, and the thin plate 36 becomes closer to a flat plate, so that the thin plate 36 can be smoothly wound up.

[0049] 3, 4, 6, and 7, a plurality of guide blocks 41 are attached along the height direction of the opening 2 at the sheet end 32B, and each is fastened to the thin plate 36 using the through holes 36A. In other words, a plurality of guide blocks 41 are lined up at the sheet end 32B in the winding direction of the sheet 32. The number of through holes 36A corresponds to the number of attached guide blocks 41. The arrangement pitch P of the through holes 36A corresponds to the attachment pitch of the guide blocks 41. For example, screws 38 are used as a means for attaching the guide blocks 41 to the sheet end 32B.

[0050] The guide block 41 is integrally molded using a resin material such as polyacetal (POM). The guide block 41 is generally rectangular when viewed from above when the guide block 41 is disposed inside the guide rail 14. The guide block 41 is formed with a groove 42 that opens on the inside in the width direction. Furthermore, protrusions 44 are formed at the opening ends in the width direction of the groove 42. The groove 42 opens on both sides in the height direction of the sheet 32. A gradually changing portion 42A in which the opening width gradually increases toward the inside in the width direction when viewed from above is formed at the inside part in the width direction of the groove 42 (a part of the groove 42 including the tip of the protrusion 44). Furthermore, a wide portion 42B in which the opening width increases in the depth direction when viewed from above is formed at the outside part in the width direction of the groove 42. The sheet end 32B including the thin plate 36 is disposed in the wide portion 42B (see FIG. 7).

[0051] Further, the guide block 41 is formed with a screw insertion hole 41A penetrating from one side in the depth direction to the groove portion 42. The screw 38 is inserted into the screw insertion hole. The screw 38 is, for example, a countersunk tapping screw. A tapered hole 41B for accommodating the head of the screw 38 is formed at the entrance of the screw insertion hole 41A. A pilot hole 41C is formed on the extension of the screw insertion hole 41A across the groove portion 42. As shown in FIG. 7, the screw 38 is inserted into the screw insertion hole 41A, penetrates the sheet end portion 32B, and is fastened into the pilot hole 41C through the through hole 36A of the thin plate 36. The length of the screw 38 is set so that its tip does not protrude to the outside from the pilot hole 41C. The screw 38 may or may not be fastened to the thin plate 36. When the screw 38 is fastened at least into the pilot hole 41C, the sheet end portion 32B including the thin plate 36 is sandwiched by the guide block 41, whereby the guide block 41 can be attached to the sheet end portion 32B.

[0052] The means for attaching the guide block 41 to the sheet end portion 32B is not limited to the screws 38, but may be rivets, clips, or engagement between portions of the guide block 41.

[0053] (action) In the sheet shutter 10 according to this embodiment, a thin plate 36 is provided in the hollow portion 32A of the sheet end 32B, and a plurality of through holes 36A are formed in the thin plate 36 at a predetermined pitch P. A plurality of guide blocks 41 are provided along the height direction in the sheet end 32B. Each guide block 41 is fastened to the thin plate 36 using the through hole 36A. Therefore, the fastening position of the guide block 41 is unlikely to shift or twist in the sheet end 32B. In addition, the thin plate 36 has flexibility. Therefore, the attachment accuracy of the guide block 41 to the sheet end 32B can be improved while maintaining the flexibility of the sheet shutter 10. In other words, an improved sheet shutter 10 can be provided.

[0054] Furthermore, in the shutter device 1 using this sheet shutter 10, the mounting precision of the guide block 41 to the sheet end portion 32B of the sheet shutter 10 is improved, so that the sliding resistance between the guide block 41 and the guide rail 14, etc. is reduced. Also, the meshing efficiency between the gear member 64 (FIG. 2) and the guide block 41 when rolling up the sheet shutter 10 is improved. This makes it possible to improve the torque transmission efficiency when driving the sheet shutter 10 to open and close, reduce noise from the device, reduce the roll diameter, reduce maintenance costs, and extend the life of the device. In other words, an improved shutter device 1 can be provided.

[0055] [Second embodiment] 8 to 11, in the sheet shutter 20 according to this embodiment, a ball chain 46 is provided in a hollow portion 32A of a sheet end portion 32B of a sheet 32. The ball chain 46 is a type of chain in which wires 48 arranged in series are connected to each other by spherical joints 51, and extend in the height direction (arrow H direction) of the opening 2 (FIG. 1). The ball chain 46 has flexibility that allows it to be wound up in a circular shape on a winding roll 24 (FIGS. 1 and 2). The wires 48 and the joints 51 are movable relative to each other to a certain degree. It should be noted that, as long as the wires 48 have the above-mentioned flexibility, the wires 48 and the joints 51 do not need to be movable relative to each other.

[0056] A plurality of guide blocks 41 are attached along the height direction at the sheet end 32B, and each is fastened to a joint 51 of the ball chain 46. Specifically, as shown in Figs. 10 and 11, the groove 42 of the guide block 41 is formed with a spherical joint 51 and, for example, a spherical recess 42C capable of accommodating the fabric of the sheet end 32B. The width of the groove 42 is set to a size capable of sandwiching the two-ply fabric of the sheet end 32B. Unlike the first embodiment, since it is not necessary to sandwich the thin plate 36 in the groove 42, it is not necessary to provide the wide portion 42B (Figs. 4 and 6).

[0057] 9 and 10, for example, in the protrusion 44 of the guide block 41, a screw insertion hole 41D is formed penetrating from one side in the depth direction to the groove portion 42. A screw 52 is inserted into this screw insertion hole 41D. A pilot hole 41E is formed on an extension of the screw insertion hole 41D across the groove portion 42. As shown in FIG. 11, the screw 52 is inserted into the screw insertion hole 41D, penetrates the sheet end portion 32B, and is fastened into the pilot hole 41E.

[0058] The guide block 41 is attached to the sheet end 32B so that the joint 51 fits in the recess 42C. Specifically, the portion of the sheet end 32B where the joint 51 of the ball chain 46 is located is sandwiched in the groove 42 of the guide block 41 so that the joint 51 is housed in the recess 42C. This allows the guide block 41 to be attached to the sheet end 32B.

[0059] Instead of the screw insertion hole 41D and the pilot hole 41E, the screw insertion hole 41A, the tapered hole 41B and the pilot hole 41C may be provided on the main body side of the guide block 41, as in the first embodiment, and the guide block 41 may be fastened to the sheet end portion 32B by the screw 38. In this case, the screw 38 is positioned so as not to interfere with the ball chain 46.

[0060] Furthermore, the means for attaching the guide block 41 to the sheet end portion 32B is not limited to the screws 38 and 52, but may be rivets, clips, or engagement between portions of the guide block 41.

[0061] Other parts are similar to those in the first embodiment, so the same parts are given the same reference numerals in the drawings and the description thereof is omitted.

[0062] (action) This embodiment is configured as described above, and its operation will be described below. In FIG. 11, in the sheet shutter 20 according to this embodiment, a ball chain 46 is provided in the hollow portion 32A of the sheet end 32B. A plurality of guide blocks 41 are provided along the height direction at the sheet end 32B. Each guide block 41 is fastened to a joint 51 of the ball chain 46. Therefore, at the sheet end 32B, the fastening position of the guide block 41 is unlikely to shift or twist. In addition, the ball chain 46 has flexibility. Therefore, the attachment accuracy of the guide block 41 to the sheet end 32B can be improved while maintaining the flexibility of the sheet shutter 20. In other words, an improved sheet shutter 20 can be provided.

[0063] Furthermore, in the shutter device 1 using this sheet shutter 20, the mounting precision of the guide block 41 to the sheet end portion 32B of the sheet shutter 20 is improved, so that the sliding resistance between the guide block 41 and the guide rail 14, etc. is reduced. Also, the meshing efficiency between the gear member 64 (FIG. 2) and the guide block 41 when rolling up the sheet shutter 20 is improved. This makes it possible to improve the torque transmission efficiency when driving the sheet shutter 20 to open and close, reduce noise from the device, reduce the roll diameter, reduce maintenance costs, and extend the life of the device. In other words, an improved shutter device 1 can be provided.

[0064] [Third embodiment] 12 to 14, in the sheet shutter 30 according to this embodiment, a flexible mesh sheet 56 is provided in a hollow portion 32A of a sheet end portion 32B of a sheet 32, the mesh sheet 56 being formed by intersecting wires 56A and 56B woven together. The wires 56A and 56B may be, for example, resin threads or metal wires. The wires 56A and 56B each extend in a direction intersecting the height direction (arrow H direction), and no wire extends parallel to the height direction.

[0065] A plurality of guide blocks 41 are attached to the sheet end 32B along the height direction, and each is fastened to the mesh sheet 56. Specifically, as shown in FIG. 14, the screw 38 is inserted into the screw insertion hole 41A of the guide block 41, passes through the sheet end 32B and the mesh sheet 56, and is fastened to the pilot hole 41C. When the screw 38 is fastened, the screw 38 enters the gap between the wires 56A and 56B in the mesh sheet 56, and advances while pushing and widening the gap. Therefore, the screw 38 is engaged with the mesh sheet 56. In this state, the sheet end 32B including the mesh sheet 56 is sandwiched by the guide block 41. As a result, the guide block 41 is attached to the sheet end 32B.

[0066] In the drawings, mesh sheet 56 is depicted with a coarse mesh (the size of the opening surrounded by wires 56A and 56B), but the mesh may be finer.

[0067] Other parts are similar to those in the first embodiment, so the same parts are given the same reference numerals in the drawings and the description thereof is omitted.

[0068] (action) This embodiment is configured as described above, and its operation will be described below. In FIG. 14, in the sheet shutter 30 according to this embodiment, a mesh sheet 56 is provided in the hollow portion 32A of the sheet end 32B. A plurality of guide blocks 41 are provided along the height direction at the sheet end 32B. Each guide block 41 is fastened to the mesh sheet 56. Therefore, at the sheet end 32B, the guide block 41 is unlikely to shift or twist in the fastening position. In addition, the mesh sheet 56 has flexibility. Therefore, the attachment accuracy of the guide block 41 to the sheet end 32B can be improved while maintaining the flexibility of the sheet shutter 30. In other words, an improved sheet shutter 30 can be provided.

[0069] Furthermore, in the shutter device 1 using this sheet shutter 30, the mounting precision of the guide block 41 to the sheet end portion 32B of the sheet shutter 30 is improved, so that the sliding resistance between the guide block 41 and the guide rail 14, etc. is reduced. Also, the meshing efficiency between the gear member 64 (FIG. 2) and the guide block 41 when rolling up the sheet shutter 30 is improved. This makes it possible to improve the torque transmission efficiency when driving the sheet shutter 30 to open and close, reduce noise from the device, reduce the roll diameter, reduce maintenance costs, and extend the life of the device. In other words, an improved shutter device 1 can be provided.

[0070] [Sheet shutter 40 according to the fourth embodiment] In FIG. 15 and FIG. 16, in the sheet shutter 40 according to this embodiment, a resin bead 86 is provided in a hollow portion 32A of a sheet end portion 32B of the sheet 32. As the resin, vinyl chloride resin, urethane, etc. can be used. This bead 86 extends in the height direction (arrow H direction) and has flexibility that allows it to bend at least in the depth direction (arrow L direction) with the height direction as a neutral axis. In addition, the bead 86 has a portion whose dimension in the width direction (arrow W direction) of the sheet 32 ​​is larger than the dimension in the thickness direction (arrow L direction) of the sheet 32, for example, a bead main body 86A. The cross-sectional shape of the bead main body 86A can be a substantially oval shape, a substantially elliptical shape, a substantially rectangular shape, etc. in the cross section of FIG. 15.

[0071] In the bead 86, a thin plate portion 86B is integrally formed and extends from the bead body 86A toward the center in the width direction of the seat 32. The thickness of the thin plate portion 86B is configured to be thinner than the thickest part of the bead body 86A. The neutral axis of the bead body 86A and the neutral axis of the thin plate portion 86B are, for example, coincident. The thin plate portion 86B has a width that protrudes further toward the center in the width direction of the seat 32 than the protrusion 44 of the guide block 41, for example.

[0072] 16, a groove 86C is formed at the end of the bead body 86A of the bead 86 on the outer side in the width direction of the sheet 32, which extends along the longitudinal direction of the bead 86 and guides the screw 38 when the screw 38 is screwed in, as described below. The cross section of the groove 86C is, for example, V-shaped, but may be any of various concave shapes such as U-shaped, rectangular, or arc-shaped. The deepest part of the groove 86C coincides with, for example, the neutral axis of the bead body 86A.

[0073] A plurality of guide blocks 41 are attached along the height direction at the seat end 32B. The seat end 32B including the bead main body 86A of the bead 86 is disposed in the wide portion 42B of the groove 42 in the guide block 41.

[0074] The guide blocks 41 are fastened to the beads 86 using screws 38 that are screwed inward from the outside in the width direction of the sheet 32. The guide block 41 has a screw insertion hole 41A that penetrates the groove portion 42 from the outside in the width direction of the sheet 32. The screw 38 is inserted into the screw insertion hole. The screw 38 is, for example, a countersunk tapping screw. A tapered hole 41B that accommodates the head of the screw 38 is formed at the entrance of the screw insertion hole 41A. The screw 38 is inserted into the screw insertion hole 41A and is fastened from the sheet end portion 32B to the bead body 86A of the bead 86. It is desirable that the length of the screw 38 is as long as possible within a range in which the tip does not protrude from the bead body 86A to the thin plate portion 86B side. This is because by ensuring a large length of the fastening portion of the screw 38, the cross-sectional strength in the height direction (arrow H direction) of the sheet shutter 40 at the mounting portion of the guide block 41 can be ensured.

[0075] The means for attaching the guide block 41 to the sheet end portion 32B is not limited to the screws 38, but may be rivets, clips, or engagement between portions of the guide block 41.

[0076] Other parts are similar to those in the first embodiment, so the same parts are given the same reference numerals in the drawings and the description thereof is omitted.

[0077] (action) This embodiment is configured as described above, and its operation will be described below. In FIG. 15, in the sheet shutter 40 according to this embodiment, a flexible resin bead 86 is provided in the hollow portion 32A of the sheet end 32B. A plurality of guide blocks 41 are provided along the height direction at the sheet end 32B. Each guide block 41 is fastened to the resin bead 86 using a screw 38 that is screwed from the outside to the inside in the width direction of the sheet 32. Therefore, at the sheet end 32B, the fastening position of the guide block 41 is unlikely to shift or twist. In addition, since the bead 86 is flexible, the flexibility of the sheet shutter 40 is maintained, and the mounting accuracy of the guide block 41 to the sheet end 32B can be improved.

[0078] Furthermore, since the bead 86 has a portion whose dimension in the width direction of the sheet 32 ​​is greater than the dimension in the thickness direction of the sheet 32, the length of the fastening portion of the screw 38 can be made longer than when the dimension of the bead 86 in the width direction of the sheet 32 ​​is equal to the dimension in the thickness direction of the sheet 32. Therefore, the cross-sectional strength in the height direction of the sheet shutter 40 at the attachment portion of the guide block 41 can be ensured.

[0079] Furthermore, the screw 38 is guided by a groove 86C (FIG. 7) formed in the bead 86 and is screwed into the bead 86. Therefore, the variation in the angle of the screw 38 relative to the bead 86 can be further suppressed.

[0080] [Sheet shutter 50 according to the fifth embodiment] 17 to 20, the sheet shutter 50 according to this embodiment includes a sheet 32, a timing belt 140, and a mesh material 34 (see FIG. 18).

[0081] A timing belt 140 provided on the sheet shutter 50 is inserted inside the guide rails 14 so as to be movable in the vertical direction. The pair of guide rails 14 guide the timing belt 140 in the vertical direction so that the sheet shutter 50 moves in the vertical direction. The rear surfaces 22B of the pair of side frames 22 are fixed to, for example, wall surfaces (not shown) on the left and right side edges of the opening 2.

[0082] (Timing belt 140) As shown in Fig. 17, the timing belt 140 is attached to both ends (i.e., both side ends) of the sheet 32 ​​in the shutter width direction along the sheet movement direction (i.e., the longitudinal direction of the sheet 32). As shown in Fig. 18, the timing belt 140 is a toothed belt and has a length along the sheet movement direction. The timing belt 140 is made of, for example, a rubber material.

[0083] Specifically, the timing belt 140 has a tooth portion 142 and an attachment portion 144. In this embodiment, the tooth portion 142 and the attachment portion 144 are integrally formed. Note that the front-rear direction used in the description of the timing belt 140 and the mesh material 34 is the direction in a state in which the timing belt 140 is disposed along the up-down direction within the guide rail 14 (the state shown in FIG. 18).

[0084] The toothed portion 142 is a portion of the timing belt 140 that meshes with the gear member 64 (see FIGS. 19 and 20). The toothed portion 142 is formed in a rectangular shape in a cross section cut in a direction perpendicular to the sheet longitudinal direction (see FIG. 18). The toothed portion 142 has an uneven portion 142A on the front side that meshes with the gear member 64. In other words, the uneven portion 142A is disposed on the inner peripheral side of the sheet shutter 50 when it is wound around the winding roll 24.

[0085] The tooth portion 142 has no recesses or projections on the side opposite to the recesses and projections 142A (rear side), and a rear surface 142B on the opposite side is made flat (see FIG. 19).

[0086] 18, the teeth portion 142 of the timing belt 140 is inserted into the guide rail 14, and the timing belt 140 is guided in the up and down direction by the guide rail 14. That is, the teeth portion 142 is also a guided portion of the timing belt 140 that is guided by the guide rail 14.

[0087] The mounting portion 144 is a portion that is attached to the sheet 32, as shown in Fig. 18. The mounting portion 144 extends inward in the shutter width direction from the center of the tooth portion 142 in the front-rear direction. The mounting portion 144 is formed in a plate shape with the thickness direction being in the front-rear direction. A rear surface 44B of the mounting portion 144 is attached to a front surface 32F of the sheet 32. Specifically, the mounting portion 144 is joined to the sheet 32 ​​by a joining method such as adhesion or welding.

[0088] (Mesh material 34) 18 is formed in a plate (sheet) shape with a thickness direction in the front-rear direction. This mesh material 34 is provided inside the teeth 142 of the timing belt 140 along the seat movement direction.

[0089] Specifically, the mesh material 34 is disposed in the center of the teeth portion 142 in the front-rear direction. That is, the mesh material 34 overlaps with the attachment portion 144 in a side view (viewed to the left). Note that the mesh material 34 may be disposed closer to the front or rear side of the teeth portion 142. That is, the mesh material 34 may be disposed on the front or rear side of the attachment portion 144.

[0090] The mesh material 34 has a plurality of wires 34A that cross each other. The plurality of wires 34A are inclined with respect to the sheet movement direction when viewed in the thickness direction of the sheet 32. Examples of the mesh material 34 include wires 34A woven by a method such as plain weave or twill weave, and wires 34A crossed and joined by a joining method such as welding. Note that the mesh material 34 may be any material that is made up of a plurality of wires 34A that cross each other. Furthermore, the wires 34A may be stainless steel or other metal wires.

[0091] (Drive roll 60 and gear member 64) As shown in Fig. 17, the drive roll 60 is disposed on the rear side inside the shutter case 18 and above the pair of guide rails 14 along the shutter width direction. The drive roll 60 is supported rotatably with the shutter width direction as its axial direction by a support portion (not shown) such as a side plate disposed inside the shutter case 18. A part of the sheet shutter 50 is wound around the drive roll 60. The drive roll 60 may be supported by the support portion that supports the winding roll 24, or may be supported by a different support portion.

[0092] As shown in Fig. 19, the pair of gear members 64 are attached to one end and the other end in the axial direction of the drive roll 60. The gear members 64 are made of metal, for example. As shown in Fig. 20, a plurality of gear teeth 66 that mesh with the teeth portion 142 of the timing belt 140 are formed in the circumferential direction on the outer periphery of the gear member 64.

[0093] 19, a flange 68 that protrudes outward in the radial direction is formed on the outer side of the gear member 64 in the shutter width direction. This flange 68 limits the inward movement of the sheet shutter 50 including the timing belt 140 in the shutter width direction. Furthermore, the drive roll 60 and the gear member 64 are configured to be capable of forward and reverse rotation by a motor (not shown).

[0094] (Contact block 80) A pair of contact blocks 80 are provided, and as shown in Fig. 17, are disposed on the rear side and on the left and right sides inside the shutter case 18. Specifically, as shown in Figs. 19 and 20, the contact blocks 80 are disposed on opposite sides of the gear member 64 with the timing belt 140 sandwiched therebetween.

[0095] The contact block 80 is formed in an arc shape using a metal material (for example, made of zinc die-cast in this embodiment), and is supported by a support portion (not shown) such as a side plate arranged inside the shutter case 18. The contact block 80 has an inner peripheral surface 80A facing the gear member 64. The contact block 80 may be supported by the support portion that supports at least one of the winding roll 24 and the driving roll 60, or may be supported by a different support portion.

[0096] When the timing belt 140, which is meshed with the gear teeth 66 of the gear member 64, moves radially outward of the gear member 64, the inner circumferential surface 80A of the contact block 80 comes into contact with the timing belt 140, restricting the movement of the timing belt 140. This maintains the meshed state between the gear teeth 66 of the gear member 64 and the toothed portion 142 of the timing belt 140.

[0097] (Opening and closing operation of shutter device 1) With the opening 2 closed by the sheet shutter 50, when the drive roll 60 and the gear member 64 are rotated forward in the A1 direction (see FIG. 20) by a motor (not shown), the sheet shutter 50 is lifted upward via the timing belt 140 in which the gear teeth 66 of the gear member 64 and the toothed portion 142 mesh. As a result, the sheet shutter 50 moves upward while being guided by the pair of guide rails 14, and opens the opening 2. At this time, the take-up roll 24, which is biased in the take-up direction by a biasing member (not shown), takes up the sheet shutter 50.

[0098] Furthermore, when the drive roll 60 and the gear member 64 are rotated in the B1 direction (see FIG. 20) by a motor (not shown) while the opening 2 is opened by the sheet shutter 50, the sheet shutter 50 is lowered downward via the timing belt 140 in which the gear teeth 66 of the gear member 64 and the toothed portion 142 mesh. As a result, the sheet shutter 50 moves downward while being guided by the pair of guide rails 14, and closes the opening 2. At this time, the sheet shutter 50 is unwound from the take-up roll 24 against the biasing force acting on the take-up roll 24 by a biasing member (not shown).

[0099] (Timing belt 240 according to first modified example) In the above embodiment, the timing belt 140 is used, but the present invention is not limited to this. For example, a timing belt 240 according to a first modified example (see Figs. 21 and 22) may be used instead of the timing belt 140. The configuration of the timing belt 240 will be described below. Note that the description of the parts configured in the same way as the timing belt 140 will be omitted as appropriate.

[0100] 21 and 22, the timing belt 240 has a toothed portion 242 and an opposing portion 244. The toothed portion 242 is a portion of the timing belt 240 that meshes with the gear member 64. The toothed portion 242 is formed in a rectangular shape in a cross section cut in a direction perpendicular to the sheet longitudinal direction.

[0101] The tooth portion 242 has a concave-convex portion 242A formed on the front side thereof, which meshes with the gear member 64. In other words, the concave-convex portion 242A is disposed on the inner peripheral side of the sheet shutter 50 when it is wound around the winding roll 24.

[0102] The tooth portion 242 has no unevenness on the side opposite to the uneven portion 242A (rear side), and the rear surface 242B is flat. The rear surface 242B is fixed to the front surface 32F of both ends of the sheet 32 ​​in the shutter width direction. Specifically, the tooth portion 242 is joined to the sheet 32 ​​by a joining method such as adhesion or welding.

[0103] In the timing belt 240, the mesh material 34 is provided along the seat movement direction inside the tooth portion 242. Specifically, the mesh material 34 is disposed toward the rear side of the tooth portion 242.

[0104] The facing portion 244 is formed in a rectangular shape in a cross section cut in a direction perpendicular to the seat longitudinal direction. The facing portion 244 is formed in a prismatic shape, and a front surface 244A and a rear surface 244B are formed as flat surfaces.

[0105] The front surfaces 244A of the facing portions 244 are fixed to the rear surfaces 32R of both ends of the sheet 32 ​​in the shutter width direction. Specifically, the facing portions 244 are joined to the sheet 32 ​​by a joining method such as adhesion or welding. More specifically, the facing portions 244 are disposed at positions facing the tooth portions 242 across the sheet 32. The tooth portions 242 and the facing portions 244 face each other across the sheet 32, thereby sandwiching the sheet 32 ​​therebetween.

[0106] 18 is not necessary. Also, the sheet 32 ​​is present at both ends of the sheet shutter 50 in the shutter width direction. Therefore, the sheet 32 ​​also enters inside the guide rail 14.

[0107] As shown in FIG. 23, the mesh material 34 may be arranged inside a plate-shaped portion 248 that is separate from the tooth portion 242, and the plate-shaped portion 248 may be joined to the tooth portion 242 by a joining method such as adhesion or welding.

[0108] 21 and 22 has been described as having the tooth portion 242 and the opposing portion 244, the tooth portion 242 may be understood as the timing belt 240, and the opposing portion 244 may be understood as an opposing member separate from the timing belt 240. In addition, in the configuration shown in FIG. 23, a member having the tooth portion 242 and the plate-shaped portion 248 may be understood as the timing belt 240, and the opposing portion 244 may be understood as an opposing member separate from the timing belt 240.

[0109] (Timing belt 340 according to second modified example) Further, a timing belt 340 according to a second modified example may be used instead of the timing belt 140. The configuration of the timing belt 340 will be described below. Note that the description of the parts configured similarly to the timing belt 140 will be omitted as appropriate.

[0110] As shown in Fig. 24, the timing belt 340 has a tooth portion 342, an attachment portion 344, and a bead portion 346. The attachment portion 344 is a portion that is attached to the sheet 32. The attachment portion 344 is formed in a plate shape with its thickness direction being in the front-rear direction. A rear surface 344B of the attachment portion 344 is attached to a front surface 32F of the sheet 32. Specifically, the attachment portion 344 is joined to the sheet 32 ​​by a joining method such as adhesion or welding.

[0111] The toothed portion 342 is a portion of the timing belt 340 that meshes with the gear member 64. The toothed portion 342 is formed in a rectangular shape in a cross section cut in a direction perpendicular to the sheet longitudinal direction. The toothed portion 342 has an uneven portion 342A that meshes with the gear member 64 formed on the front side. In other words, the uneven portion 342A is disposed on the inner peripheral side of the sheet shutter 50 when it is wound around the winding roll 24.

[0112] The tooth portion 342 has no irregularities on the side opposite to the irregular portion 342A (rear side), and the rear surface 342B is flat. The rear surface 342B is fixed to the front surface of the attachment portion 344. Specifically, the tooth portion 342 is joined to the attachment portion 344 by a joining method such as adhesion or welding.

[0113] In the timing belt 340, the mesh material 34 is provided inside the tooth portion 342 along the seat movement direction. Specifically, the mesh material 34 is disposed toward the rear side of the tooth portion 342.

[0114] The bead portion 346 is formed in a cylindrical shape with the vertical direction as the axial direction. The bead portion 346 is provided integrally with the mounting portion 344 at the outer end of the mounting portion 344 in the shutter width direction.

[0115] Then, the bead portion 346 is inserted into the guide rail 14, and the timing belt 340 is guided in the up and down direction by the guide rail 14. That is, in the timing belt 340, the bead portion 346 functions as a guided portion of the timing belt 340 that is guided by the guide rail 14. Note that the tooth portion 342 and the attachment portion 344 are disposed, for example, on the outside of the guide rail 14 and inside the side frame 22.

[0116] As shown in FIG. 25, the mesh material 34 may be disposed inside a plate-shaped portion 348 that is separate from the tooth portion 342, and the plate-shaped portion 348 may be joined to the tooth portion 342 by a joining method such as adhesion or welding.

[0117] 24 has been described as having tooth portion 342, mounting portion 344, and bead portion 346, but tooth portion 342 may be regarded as timing belt 240, and a member having mounting portion 344 and bead portion 346 may be regarded as a mounting member separate from timing belt 240. In addition, in the configuration shown in FIG. 25, a member having tooth portion 342 and plate portion 348 may be regarded as timing belt 340, and a member having mounting portion 344 and bead portion 346 may be regarded as a mounting member separate from timing belt 240.

[0118] (Timing belt manufacturing method) Next, an example of a method for manufacturing a timing belt will be described. This manufacturing method can be used to manufacture the timing belt 140 (see FIG. 17), the toothed portion 242 of the timing belt 240 (see FIG. 21), and the toothed portion 342 of the timing belt 340 (see FIG. 24). The following description will be given assuming that the toothed portion 242 of the timing belt 240 (see FIG. 21) is manufactured.

[0119] This manufacturing method includes a preparation step, a placement step, an injection step, a cooling step, and a demolding step. In the preparation step, a mold 70 (see FIG. 26) having a first mold 71 and a second mold 72 is prepared. The first mold 71 is formed in a U-shaped cross section with an open lower side, and has a length in one direction (the depth direction of the paper in FIG. 26). As shown in FIG. 27, the second mold 72 is formed in a rectangular cross section, and has a length along the longitudinal direction of the first mold 71. A plurality of recesses 72A are formed on the upper surface of the second mold 72 at predetermined intervals in the longitudinal direction.

[0120] 26, in the mold 70, a space 79 (cavity) into which the rubber material is injected is formed by a gap between the first mold 71 and the second mold 72 and the recesses 72A. The rubber material injected into the recesses 72A forms the convex portions of the uneven portion 242A in the tooth portion 242 of the timing belt 240. The pitch of the recesses 72A corresponds to the pitch of the convex portions of the uneven portion 242A.

[0121] In the disposing step, the mesh material 34 is disposed in the space 79 as shown in Fig. 26. That is, the mesh material 34 is disposed on the upper surface of the second mold 72 as shown in Fig. 27.

[0122] In the injection process, the heated and melted rubber material is injected (filled) into the space 79. Then, in the cooling process, the heated and melted rubber material is cooled and hardened. In the demolding process, the mold 70 is removed from the rubber material. In this way, the tooth portion 242 of the timing belt 240 is manufactured.

[0123] Here, in a configuration (comparative example) using teeth portion 242 of timing belt 240 in which multiple wires are embedded in parallel along the longitudinal direction of timing belt 240 instead of mesh material 34, it is necessary to arrange wires W1 in parallel on the upper surface of second mold 72 as shown in Fig. 28. This increases the number of steps in the manufacture of timing belt 240, and reduces the productivity of timing belt 240.

[0124] In contrast, in this embodiment, as shown in Fig. 27, when manufacturing the teeth portion 242 of the timing belt 240 using a mold 70, the mesh material 34, which can be handled as one part, can be placed in the mold 70, so the number of steps in manufacturing the timing belt 240 can be reduced compared to a configuration in which multiple wires W1 must be arranged in parallel during manufacturing. This improves the productivity of the timing belt 240. As a result, the number of steps in manufacturing the sheet shutter 50 and the shutter device 1 can be reduced, improving productivity.

[0125] (Another manufacturing method for timing belts) Next, an example of another manufacturing method of a timing belt will be described. This manufacturing method can be used to manufacture, for example, the toothed portion 242 of the timing belt 240 (see FIG. 21) and the toothed portion 342 of the timing belt 340 (see FIG. 24). The following description will be given assuming that the toothed portion 242 of the timing belt 240 (see FIG. 21) is manufactured.

[0126] This manufacturing method includes a preparation step, an arrangement step, an injection step, a cooling step, a demolding step, and a cutting step. In the preparation step, a mold 90 (see Figs. 29 and 30) having an inner cylinder 92 and an outer cylinder 94 is prepared. In this mold 90, the inner cylinder 92 is formed in a cylindrical shape. Also, the outer cylinder 94 is formed in a cylindrical shape having an inner diameter larger than the outer diameter of the inner cylinder 92. In other words, the inner cylinder 92 and the outer cylinder 94 are arranged coaxially with a gap between them. Furthermore, a plurality of spiral grooves 98 are formed on the inner peripheral surface of the outer cylinder 94. Note that, for example, the inner cylinder 92 and the outer cylinder 94 are made divisible into a plurality of parts so that the mold 90 can be demolded from the molded product.

[0127] In the mold 90, a space 99 (cavity) into which the rubber material is injected is formed by the gap between the inner cylinder 92 and the outer cylinder 94 and the groove 98. The rubber material injected into the groove 98 forms the convex portions of the uneven portion 242A of the tooth portion 242 of the timing belt 240. The pitch of the groove 98 corresponds to the pitch of the convex portions of the uneven portion 242A of the tooth portion 242.

[0128] In the arrangement step, mesh material 34 is arranged in space 99. Mesh material 34 is formed in a cylindrical shape having an inner diameter larger than the outer diameter of inner cylinder 92 and an outer diameter smaller than the inner diameter of outer cylinder 94. Furthermore, mesh material 34 has wire material 34A extending along the axial direction and wire material 34A that intersects with wire material 34A and extends along the circumferential direction.

[0129] Specifically, the mesh material 34 is disposed in the space 99 coaxially with the die 90 with a gap between the outer peripheral surface of the inner cylinder 92 and the inner peripheral surface of the outer cylinder 94. At this time, the multiple wires 34A of the mesh material 34 are disposed inclined with respect to the longitudinal direction (spiral direction) of the spiral groove 98.

[0130] In the injection process, the heated and melted rubber material is injected (filled) into the space 99. Then, in the cooling process, the heated and melted rubber material is cooled and hardened. In the demolding process, the mold 90 is removed from the rubber material. As a result, as shown in Fig. 31, a cylindrical intermediate molded product 500 is formed with a convex portion 504 formed in a spiral shape along the X1 direction on the outer circumferential surface 502. Note that in Fig. 31, a part of the intermediate molded product 500 is cut away to show the mesh material 34 inside.

[0131] In the cutting process, the cylindrical intermediate product 500 is cut in a direction perpendicular to the formation direction (X1 direction) of the convex portion 504. This produces the teeth portion 242 of the timing belt 240. As described above, by cutting the intermediate product 500, the wire material 34A of the mesh material 34 is inclined with respect to the longitudinal direction of the teeth portion 242 of the timing belt 240 (i.e., the sheet moving direction). In FIG. 31, the cutting line along which the intermediate product 500 is cut is indicated by reference numeral 550.

[0132] In this manufacturing method, the cylindrical intermediate product 500 is formed, and the teeth 242 of the timing belt 240 are manufactured by cutting the intermediate product 500, so that a long timing belt 240 can be manufactured in a narrow space.

[0133] Furthermore, in a configuration (comparative example) in which teeth portion 242 of timing belt 240 in which multiple wires are embedded in parallel along the longitudinal direction of timing belt 240 is used instead of mesh material 34, it is necessary to arrange the wires in a cylindrical shape within space 99. This increases the number of steps in the manufacture of timing belt 240, and reduces the productivity of timing belt 240.

[0134] In contrast, in this embodiment, as shown in Figures 29 and 30, when manufacturing the teeth portion 242 of the timing belt 240 using a mold 90, the mesh material 34, which can be handled as one part, can be placed in the space 99 of the mold 90, so the number of steps in manufacturing the timing belt 240 can be reduced compared to a configuration in which a plurality of wires must be arranged in a cylindrical shape during manufacturing. This improves the productivity of the timing belt 240. As a result, the number of steps in manufacturing the sheet shutter 50 and the shutter device 1 can be reduced, improving productivity.

[0135] (Effects of this embodiment) As described above, in this embodiment, the mesh material 34 having a plurality of mutually intersecting wires 34A is provided along the seat movement direction inside the timing belts 140, 240, 340. Therefore, the timing belts 140, 240, 340 are less likely to deform in the seat movement direction, and the pitch accuracy of the projections and recesses of the timing belts 140, 240, 340 can be maintained.

[0136] In particular, according to this embodiment, the multiple wires 34A of the mesh material 34 are inclined with respect to the sheet movement direction when viewed in the thickness direction of the sheet 32, so that the timing belts 140, 240, 340 can be reinforced in the sheet movement direction (up and down), the shutter width direction (left and right), and the thickness direction of the sheet 32 ​​(front and back) compared to the case where a mesh material 34 having wires 34A aligned along the sheet movement direction and wires 34A aligned along the shutter width direction is used.

[0137] (Modification) In the present embodiment, the mesh material 34 has a plurality of wires 34A that are inclined with respect to the sheet movement direction when viewed in the thickness direction of the sheet 32, but is not limited to this. For example, a mesh material 34 having wires 34A aligned along the sheet movement direction when viewed in the thickness direction of the sheet 32 ​​and wires 34A that intersect with the wires 34A and aligned along the shutter width direction may be used.

[0138] Although not specifically described in this embodiment, the motor that generates the driving force transmitted to the drive roll 60 and the gear member 64 may be switched between operation and non-operation using a remote control or the like. [Other embodiments] An example of an embodiment of the present invention has been described above, but the embodiment of the present invention is not limited to the above, and it goes without saying that various modifications can be made without departing from the spirit and scope of the present invention.

[0139] For example, since the guide block 41 is a part that engages with the gear member 64 of the drive roll 60 when the sheet shutters 10, 20, 30, 40, 50 are wound up and unwound, the guide block 41 can also be referred to as a "tooth portion" or an "engagement element."

[0140] In addition, the configurations described in the above embodiments and modifications can be used in appropriate combination. [Explanation of symbols]

[0141] 1 Shutter device 2 Opening 10 Sheet Shutter 14 Guide rail 20 Sheet Shutter 30 Sheet Shutter 32 sheets 32A Cavity 32B Sheet end 36 thin plate 36A through hole 40 Sheet Shutter 41 Guide block 46 Ball Chain 48 Wire rod 50 Sheet Shutter 51 Joint 56 Mesh Sheet Pitch

Claims

1. A sheet shutter that is guided by left and right guide rails erected at both ends of an opening in a building in the width direction and can open and close the opening, a sheet having a width extending between the guide rails and having a hollow portion extending in a height direction of the opening at an end of the sheet in the width direction guided by the guide rails; a thin plate provided in the hollow portion, extending in the height direction, having a plurality of through holes formed at a predetermined pitch, and having flexibility; a plurality of guide blocks attached along the height direction at the end of the sheet, each of the guide blocks being fastened to the thin plate by using the through hole; A sheet shutter having a

2. A sheet shutter that is guided by left and right guide rails erected at both ends of an opening in a building in the width direction and can open and close the opening, a sheet having a width extending between the guide rails and having a hollow portion extending in a height direction of the opening at an end of the sheet in the width direction guided by the guide rails; a ball chain provided in the hollow portion, extending in the height direction, and including wires arranged in series and connected to each other by spherical joints; A plurality of guide blocks are attached to the end of the sheet along the height direction, each of the guide blocks being fastened to the joint of the ball chain; A sheet shutter having a

3. A sheet shutter that is guided by left and right guide rails erected at both ends of an opening in a building in the width direction and can open and close the opening, a sheet having a width extending between the guide rails and having a hollow portion extending in a height direction of the opening at an end of the sheet in the width direction guided by the guide rails; a mesh sheet provided in the hollow portion, extending in the height direction, and having flexibility; A plurality of guide blocks are attached along the height direction at the end of the sheet, and each guide block is fastened to the mesh sheet; A sheet shutter having a

4. A sheet shutter that is guided by left and right guide rails erected at both ends of an opening in a building in the width direction and can open and close the opening, a sheet having a width extending between the guide rails and having a hollow portion extending in a height direction of the opening at an end of the sheet in the width direction guided by the guide rails; a resin bead provided in the hollow portion, extending in the height direction, having flexibility, and having a portion whose dimension in the width direction of the sheet is larger than the dimension in the thickness direction of the sheet; a plurality of guide blocks are attached along the height direction at the end of the sheet, and each guide block is fastened to the bead by a screw that is screwed from the outer side to the inner side in the width direction of the sheet; A sheet shutter having a

5. 5. The sheet shutter according to claim 4, wherein a groove is formed at an outer end of the bead in the width direction of the sheet, the groove extending along the longitudinal direction of the bead and guiding the screw when the screw is screwed in.

6. A sheet shutter that is guided by left and right guide rails erected at both ends of an opening in a building in the width direction and can open and close the opening, A gear member disposed above the opening; a seat that can open and close the opening by moving in a vertical direction; a timing belt provided on each side edge of the sheet along the moving direction of the sheet, engaging with the gear member and moving in the up and down direction in response to forward and reverse rotation of the gear member; a mesh material provided inside the timing belt along the moving direction, the mesh material having a plurality of wires intersecting each other; A sheet shutter having a

7. The sheet shutter according to claim 6 , wherein the plurality of wires of the mesh material are inclined with respect to the movement direction when viewed in a thickness direction of the sheet.

8. A shutter device comprising the sheet shutter according to any one of claims 1 to 7.

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