Sheet shutter device

Abstract

To improve safety while suppressing deflection of a sheet in a sheet shutter device.SOLUTION: A sheet shutter device 1, which is guided by right and left guide rails 14 erected at both ends in a width direction of an opening of a building and can open / close the opening, includes: a drive roll 60 and a winding roll 24 (a drive unit) provided in a shutter case; a sheet 10 having a width extending between the guide rails 14 and capable of being wound onto the shutter case 18 and unwound from the shutter case 18 by the drive unit; a buffer section 100 provided at a lower end of the sheet 10 along the width direction of the sheet 10; and a reinforcing body 102 provided above the buffer section 100 on the sheet 10 along the width direction of the sheet 10.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] In a sheet shutter device, a structure has been disclosed in which a weight is attached to the lower end of the sheet to prevent the sheet from sagging, and multiple reinforcing members such as pipes are arranged above the weight (see Patent Documents 1-3). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-131765 [Patent Document 2] Japanese Patent Application Laid-Open No. 2012-21265 [Patent Document 3] Japanese Patent Application Laid-Open No. 2006-225936 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-described conventional example, no consideration is given to interference between the lower end of the sheet and people, machines, etc. when the sheet is unrolled (when the sheet is lowered), and it is believed that there is room for improvement in terms of safety.

[0005] The present invention aims to improve safety while suppressing deflection of a sheet in a sheet shutter device. [Means for solving the problem]

[0006] The sheet shutter device of the first aspect is a sheet shutter device 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 has a drive unit provided within the shutter case, a sheet that has a width extending between the guide rails and can be wound into and unwound from the shutter case by the drive unit, a buffer unit provided at the lower end of the sheet along the width direction of the sheet, and a reinforcing body provided on the sheet above the buffer unit along the width direction of the sheet.

[0007] In this sheet shutter device, a buffer section is provided at the bottom end of the sheet along the width direction of the sheet, which can mitigate the impact of interference between the bottom end of the sheet and people, machines, etc. In addition, the reinforcing member can suppress deflection of the sheet. Because the reinforcing member is provided above the buffer section along the width direction of the sheet, interference with people, machines, etc. is unlikely to occur.

[0008] In a second aspect, in the sheet shutter device according to the first aspect, when the sheet is fully wound up, the reinforcing body is positioned within the shutter case and in front of the drive unit in the winding direction.

[0009] In this sheet shutter device, when the sheet is fully wound (the shutter is fully open), the reinforcing body is located in front of the drive unit, so the reinforcing body does not move back and forth beyond the drive unit when the sheet is wound or unwound. Therefore, the sheet can be wound or unwound smoothly.

[0010] In a third aspect, in the sheet shutter device according to the first or second aspect, a reflective material that reflects light is provided in the buffer section or in the vicinity of the buffer section.

[0011] In this sheet shutter device, a reflective material is provided in the buffer section or in its vicinity, so that it is possible to draw the attention of vehicles and people near the opening when the sheet is opened or closed.

[0012] In a fourth aspect, in the sheet shutter device according to the third aspect, the reflective material is visible from diagonally below the shutter case when the winding of the sheet is complete.

[0013] In this sheet shutter device, when the sheet has been fully wound up (the shutter is fully open), the reflective material can be seen from diagonally below the shutter case, making it easy for the driver of a vehicle passing through the opening to confirm that the shutter is fully open.

[0014] In a fifth aspect, in the sheet shutter device according to the first aspect, the reinforcing body is separable.

[0015] In this sheet shutter device, the reinforcing body is separable, so that even if there is no space on the left or right side of the sheet shutter device, the reinforcing body can be replaced.

[0016] In a sixth aspect, in the sheet shutter device according to the first aspect, the cross section of the reinforcing body is circular or polygonal. [Effects of the Invention]

[0017] According to the present invention, it is possible to improve safety while suppressing deflection of the sheet in the sheet shutter device. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a perspective view showing a sheet shutter device according to an embodiment of the present invention; [Figure 2] FIG. 3 is a cross-sectional view showing the inside of the shutter case. [Figure 3] FIG. 10 is a perspective view showing a flap portion in the storage section. [Figure 4] FIG. 10 is an exploded perspective view showing the state in which the flap is turned up. [Figure 5] FIG. 10 is a perspective view showing a state in which the connecting member has been pulled out from the reinforcing body on one side. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] 10 is a perspective view showing a state in which the frame is turned up and the reinforcing body is pulled out from the housing portion. FIG. [Figure 9] FIG. 10 is a side view showing a state in which a person's head is in contact with the buffer section. [Figure 10] 10 is a side view schematically showing how the reinforcing member suppresses deflection of the seat. FIG. [Figure 11] FIG. 10 is a perspective view showing the position of the reflector when the shutter is fully open. [Figure 12] FIG. 10 is a partially cutaway perspective view showing the attached state of the end of the reinforcing body. DETAILED DESCRIPTION OF THE INVENTION

[0019] 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 sheet shutter device 1, arrow W indicates the width direction (horizontal direction) of the sheet shutter device 1, and arrow L indicates the depth direction (horizontal direction) of the sheet shutter device 1. In the following description, the direction indicated by arrow W in FIG. 1 will be referred to as the right side of the sheet shutter device 1, and the direction opposite to the direction indicated by arrow W will be referred to as the left side of the sheet shutter device 1. In addition, in the following description, the direction indicated by arrow L in FIG. 1 will be referred to as the rear of the sheet shutter device 1, and the direction opposite to the direction indicated by arrow L will be referred to as the front of the sheet shutter device 1.

[0020] Furthermore, the left-right direction of the sheet shutter device 1 may be referred to as the "width direction," and the front-to-rear direction of the sheet shutter device 1 may be referred to as the "shutter depth direction." Note that the above left, right, front, and rear are directions defined for the convenience of explanation, and the configuration of the sheet shutter device 1 is not limited to these directions.

[0021] (Overall composition) 1 and 2, the sheet shutter device 1 is an opening / closing device that is guided by left and right guide rails 14 attached to an opening 2 of a building and can open and close the opening 2. The sheet shutter device 1 includes a take-up roll 24 and a drive roll 60 as examples of a drive unit, a sheet 10, a buffer unit 100, and a reinforcing body 102. The sheet shutter device 1 also includes a frame 12 and a contact block 80. The frame 12, the take-up roll 24, the sheet 10, the drive roll 60, and the contact block 80 are basically symmetrical in a front view with respect to a center line CL in the width direction (hereinafter referred to as the "width direction") of the sheet shutter device 1. The "width direction" also corresponds to the width direction of the opening 2. The opening 2 is, for example, a loading entrance to a room such as a freezer, a refrigerator, or a warehouse. Hereinafter, closing the opening 2 will sometimes be referred to as "closing," and opening the opening 2 will sometimes be referred to as "opening."

[0022] The sheet shutter device 1 may be applied to entrances and windows of buildings, etc., and can be applied to openings that are opened and closed 2. The openings 2 to which the sheet shutter device 1 is applied are specifically openings that are formed in the side walls of structures, etc., and that open laterally (laterally).

[0023] (Frame 12) The frame 12 comprises 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 sheet shutter device 1, and are arranged on both sides of an opening 2 such as a loading entrance in the width direction, at both ends of the sheet 10 in the width direction. The "up-down direction" also corresponds to the height direction of the opening 2 and the height direction of the sheet 10 when the opening 2 is closed.

[0024] The cross section of the side frame 22 cut in a direction perpendicular to its longitudinal direction has a U-shape with an opening on the inside in the shutter width direction (i.e., the side closer to the center line CL in the width direction of the sheet shutter device 1).

[0025] Furthermore, guide rails 14 (FIG. 2) extending in the vertical direction are disposed inside each of the pair of side frames 22. The pair of guide rails 14 guide the sheet 10 in the vertical direction so that the sheet 10 moves in the vertical direction. A cross section of the guide rail 14 cut in a direction perpendicular to its longitudinal direction is generally U-shaped with an opening on the inner side in the width direction. The inner side in the width direction is the side closer to the center line CL in the width direction of the sheet shutter device 1 in FIG. 1. The upper ends of the guide rails 14 and the side frames 22 are open upward. A guide block (not shown), for example, provided on the sheet 10 is supported inside the guide rail 14 so as to be movable in the vertical direction.

[0026] As shown in FIG. 1, the shutter case 18 is formed in a box shape and extends in the width direction so as to connect the upper ends of a pair of side frames 22. As shown in FIG. 2, a cross section of the shutter case 18 cut in a direction perpendicular to its longitudinal direction has a rectangular tubular shape extending from above the side frames 22 to one side (the right side in the figure) in the depth direction of the sheet shutter device 1 (hereinafter referred to as the "shutter depth direction"). The interior of the shutter case 18 is hollow. A reinforcing member 20, for example, made of an angle bar, is disposed on the inner surface of the shutter case 18. The reinforcing member 20 may be provided at multiple locations along the longitudinal direction of the shutter case 18 at intervals. 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 16 at the upper edge of the opening 2. The interior of the shutter case 18 communicates with the interiors of the pair of side frames 22 and the pair of guide rails 14 through openings at the upper ends of the pair of side frames 22 and the pair of guide rails 14 .

[0027] 2, a lintel 26, a lintel cover 28, and a guide roller 34 are provided at the bottom of the shutter case 18. The lintel 26 forms at least a part of the entrance / exit 30 for the sheet 10 and is an opening that can be used for maintenance of the sheet 10 and the winding roll 24 and drive roll 60, which are examples of a drive unit.

[0028] The lintel cover 28 is detachable from the shutter case 18, blocks a portion of the lintel 26 to form an entrance 30 for the sheet 10, and is configured to be adjustable in width. The guide roller 34 is detachably provided inside the shutter case 18 through the lintel 26, and is configured to be adjustable in distance from the sheet 10.

[0029] 2 and 3, the guide roller 34 has a roller 36, a guide roller body 40 equipped with a base 38 that supports the rotation of the roller 36, and a bracket 42 interposed between the guide roller body 40 and the shutter case 18. A plurality of guide rollers 34 may be provided in the longitudinal direction of the shutter case 18. The guide rollers 34 prevent the sheet 10 from being displaced rearward (toward the drive roll 60) within the shutter case 18 when the sheet 10 is wound or unwound.

[0030] The roller 36 is rotatably supported by a shaft 44, both ends of which are supported by a base 38. The base 38 is formed, for example, in a U-shape in plan view, and supports the shaft 44 with opposing side wall portions 38A. Ends of the side wall portions 38A opposite the roller 36 are integrally joined by a front wall portion 38B. Mounting portions 38B that protrude outward in the width direction are provided on the lower edges of the side wall portions 38A.

[0031] The bracket 42 has, for example, L-shaped wall portions 42A1 and 42A2, a mounting seat 42B2 formed by folding back from the edge of the wall portion 42A1, and a mounting seat 42B1 formed by folding back from the edge of the wall portion 42A2. The wall portion 42A1 is formed longer than the wall portion 42A2. Through-holes 42C1 and 42C2 are formed at the widthwise ends of the portion where the wall portions 42A1 and 42A2 intersect. In the illustrated example, the through-holes 42C1 and 42C2 are connected to each other and are formed in a notched shape.

[0032] The guide roller main body 40 can be mounted by selecting either mounting seat 42B1 or mounting seat 42B2. The lengths of the wall portions 42A1 and 42A2 are different, so the distance between the guide roller 34 and the sheet 10 can be adjusted by changing the way the bracket 42 is mounted to the shutter case 18. As shown in the figure, when the wall portion 42A2 of the bracket 42 is mounted horizontally, the distance between the guide roller 34 and the sheet 10 is longer, and when the wall portion 42A1 of the bracket 42 is mounted horizontally, the distance between the guide roller 34 and the sheet 10 is shorter.

[0033] In the illustrated example, the mounting portion 38B of the base 38 of the guide roller main body 40 is fixed to a mounting seat 42B1 of the bracket 42 with a screw 46. Furthermore, the front wall portion 38C of the base 38 of the guide roller main body 40 is fixed to a wall portion 42A1 of the bracket 42 with a screw 48. The wall portion 42A1 of the bracket 42 is fixed to a mounting portion 54 provided on the bottom of the shutter case 18 with a screw 50. With this mounting method, the wall portion 42A2 is horizontal, and the distance between the guide roller 34 and the sheet 10 is increased.

[0034] Although not shown, the mounting portion 38B of the base 38 of the guide roller body 40 may be fixed to the mounting seat 42B2 of the bracket 42, and the front wall portion 38C may be fixed to the mounting seat 42B1 of the bracket 42. In this case, the wall portion 42A2 of the bracket 42 is fixed to the mounting portion 54. The wall portion 42A1 becomes horizontal, and the distance between the guide roller 34 and the sheet 10 becomes shorter.

[0035] 2, the lintel cover 28 can be attached to and detached from the shutter case 18 from below the guide roller 34. Specifically, the lintel cover 28 is fixed by a screw 52 across the bottom of the shutter case 18 and the bracket 42 of the guide roller 34.

[0036] A guide roller 32 is provided on the inner surface of the rear surface 18B side of the shutter case 18. This guide roller 32 is provided on the opposite side of the guide roller 34 with the sheet 10 sandwiched between them. A plurality of guide rollers 32 may be provided in the longitudinal direction of the shutter case 18. The guide roller 32 prevents the sheet 10 from being displaced forward in the shutter case 18 (towards the wall surface 16) when the sheet 10 is wound up and unwound.

[0037] (winding roll 24) As shown in Fig. 2, the winding roll 24 is a roll that winds up the sheet 10, and is arranged inside the shutter case 18 on one side in the shutter depth direction. One end of the sheet 10 is attached to the winding roll 24. This one end is the upper end when the sheet 10 is in a state where it 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 10 is wound up (hereinafter referred to as the "winding direction"). In this configuration, a force in the winding direction is applied to the sheet 10 by the winding roll 24.

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

[0040] The drive roll 60 extends in the width direction. In other words, the axial direction of the drive roll 60 is the width direction. Furthermore, the drive roll 60 is rotatably supported by a frame member 58. The drive roll 60 also includes a roll body extending in the width direction and a pair of gear members (not shown) attached to both ends of the roll body in the width direction. The gear members are made of, for example, metal, and have a plurality of gear teeth (not shown) aligned in the circumferential direction that engage with guide blocks (not shown) provided on both ends of the sheet 10.

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

[0042] The contact block 80 is formed in an arc shape using a metal material (in this embodiment, made of zinc die-cast), and is attached to the frame member 58. In this configuration, when the guide block engaged with the gear member moves outward in the gear radial direction, it comes into contact with the contact block 80, thereby preventing further movement of the guide block. This maintains the engagement between the gear member and the guide block.

[0043] (Sheet 10) 1 and 2, the sheet 10 has a width extending between the left and right guide rails 14 (side frames 22), and can be wound into and unwound from the shutter case 18 by a drive roll 60 serving as a drive unit. The sheet 10 is guided by the left and right guide rails 14, and can open and close the opening 2. The sheet 10 may be provided with a transparent window 11 (FIG. 12).

[0044] (Buffer part 100) 1 and 2, buffer section 100 is, for example, a hollow section provided at the lower end of sheet 10 along the width direction of sheet 10, and is formed, for example, in a drop-shaped cross section. Buffer section 100 may be formed by rolling up a portion of the lower end of sheet 10, or may be formed into a hollow shape from a flexible material similar to sheet 10 and attached to the lower end of sheet 10. Buffer section 100 may also be formed by combining a portion of the lower end of sheet 10 with a separate member.

[0045] A reflective material 104 that reflects light is provided in or near the buffer section 100. The reflective material 104 is formed, for example, in a continuous band shape across substantially the entire width of the sheet 10. The shape and arrangement of the reflective material 104 are not limited to this, and the reflective material 104 may be arranged intermittently or locally. The reflective material 104 may be provided on both the front and rear surfaces of the sheet 10, or on only one surface. As shown in FIG. 11 , when the sheet 10 is fully wound up, the reflective material 104 is visible from diagonally below the shutter case 18. In other words, the position of the bottom end of the sheet 10 and the position of the reflective material 104 when the sheet 10 is fully wound up are set so that the reflective material 104 is visible from the entrance / exit 30 when the sheet 10 is fully wound up.

[0046] (reinforcement body 102) 1 and 2, the reinforcing member 102 is provided above the buffer section 100 of the sheet 10 and along the width direction of the sheet 10. The reinforcing member 102 is provided, for example, at a position approximately 300 mm above the buffer section 100. This 300 mm is based on the result of calculating the position where the reinforcing member 102 reduces the deflection of the sheet 10. When the opening 2 is closed, a storage section 108 is provided on the surface of the sheet 10 facing the shutter case 18. The storage section 108 is formed by rolling up the material of the sheet 10 or a similar flexible sheet and fastening the upper edges of the sheet 10 to each other with, for example, screws 109 (FIG. 12). When the winding of the sheet 10 is complete, the reinforcing member 102 is arranged so as to be located within the shutter case 18 and before the drive roll 60 in the winding direction.

[0047] As shown in Figures 1 and 4 to 6, the reinforcing body 102 is housed in this housing section 108. A flap 110 is provided in approximately the center of the housing section 108 in the width direction. The flap 110 is formed, for example, by making a cut in a part of the housing section 108. The flap 110 can be fastened to the pipe 106 with a screw 112 (Figure 4). The interior of the housing section 108 can be exposed by flipping up the flap 110 (Figure 5).

[0048] The reinforcing member 102 is a pipe 106 made of a material such as metal, resin, or fiber-reinforced resin. The cross section of the pipe 106 is, for example, circular or polygonal. The polygonal shape is, for example, rectangular or hexagonal. In this embodiment, because the width of the sheet 10 is large, two pipes 106 are connected in series by a connecting member 114. For example, a screw 116 is used for this connection. In this manner, the reinforcing member 102 may be separable. The pipe 106 is formed with a through-hole 106A for passing the screw 116 therethrough. The connecting member 114 is, for example, a hexagonal prism-shaped member that can be inserted inside the pipe 106. The connecting member 114 is formed with four female thread portions 114A into which the screws 116 are threaded ( FIG. 7 ). Although not shown, four female thread portions 114A are also formed on the radially opposite side of the illustrated female thread portion 114A. The female thread portion 114A on one axial side is used to fasten one pipe 106, and the female thread portion 114A on the other axial side is used to fasten the other pipe 106. In other words, each pipe 106 is fastened to the connecting member 114 by four screws 116 on both radial sides.

[0049] 12, caps 115 made of, for example, resin are attached to both ends of the reinforcing body 102, in other words, the ends of the pipe 106 on the outer sides in the width direction of the sheet 10. The ends of the storage section 108 are fastened together with the caps 115 and the pipe 106 by screws 118.

[0050] In addition, if there is space on the left and right sides of the sheet shutter device 1 that allows the reinforcing body 102 to be pulled out, the reinforcing body 102 may be configured as a single pipe 106, and the flap 110 may not be provided.

[0051] (action) This embodiment is configured as described above, and its operation will be described below. In Fig. 9, in the sheet shutter device 1 according to this embodiment, a buffer portion 100 is provided at the lower end of the sheet 10 along the width direction of the sheet 10, so that it is possible to mitigate the impact when the lower end of the sheet 10 interferes with a person 120, a machine, or the like.

[0052] 10, the reinforcing member 102 can suppress deflection of the sheet 10 due to wind or the like. The two-dot chain line in the figure indicates a comparative example. This comparative example does not have the reinforcing member 102, and therefore deflection is large, but in this embodiment, the reinforcing member 102 suppresses deflection more than the comparative example. This reinforcing member 102 is provided above the buffer section 100 along the width direction of the sheet 10, and therefore is less likely to interfere with people 120, machinery, etc.

[0053] As shown in Figure 2, when the winding of the sheet 10 is complete (the shutter is fully open, and the opening 2 is open), the reinforcing member 102 is located in front of the drive roll 60, so the reinforcing member 102 does not move back and forth across the drive roll 60 when the sheet 10 is wound or unwound. Therefore, the sheet 10 can be wound or unwound smoothly.

[0054] 1, reflective material 104 is provided in or near buffer section 100, so that it is possible to alert vehicles and people near opening 2 when sheet 10 is opened or closed. In particular, as shown in FIG. 11, when sheet 10 is fully wound up (shutter fully open, opening 2 open), reflective material 104 is visible from diagonally below shutter case 18, so that drivers of vehicles passing through opening 2 can easily confirm that the shutter is fully open.

[0055] As described above, according to this embodiment, it is possible to improve safety while suppressing the bending of the sheet 10 in the sheet shutter device 1.

[0056] As shown in Figure 12, when replacing the reinforcing body 102, the flap 110 is flipped up and the connection between one of the pipes 106 and the connecting member 114 is released, allowing the pipes 106 to be pulled out one by one from the storage section 108. It is also possible to insert a new pipe 106 and connect it with the connecting member 114. Even if there is no space on the left and right sides of the sheet shutter device 1, the reinforcing body 102 has a split structure, making it possible to replace the reinforcing body 102, for example.

[0057] [Other embodiments] The above describes one example of an embodiment of the present invention, 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 of the present invention.

[0058] In the state where winding of the sheet 10 is completed, the reinforcing member 102 is positioned in front of the drive roll 60 (drive unit), but the reinforcing member 102 may be configured to move back and forth beyond the drive unit.

[0059] Although the reflective material 104 is provided in or near the buffer section 100, the structure may be such that the reflective material 104 is not provided.

[0060] When the winding of the sheet 10 is complete, the reflective material 104 is visible from diagonally below the shutter case 18, but the structure may be such that the reflective material 104 is not visible from diagonally below the shutter case 18 in the same state. [Explanation of symbols]

[0061] 1 Sheet shutter device 2 Opening 10 sheets 14 Guide rail 18 Shutter Case 24 Winding roll (drive unit) 60 Drive roll (drive unit) 100 buffer 102 Reinforcement 104 Reflective material

Claims

1. A sheet shutter device 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 drive unit provided in the shutter case; a sheet having a width extending between the guide rails and capable of being wound into and unwound from the shutter case by the drive unit; a buffer portion provided at the lower end of the sheet along the width direction of the sheet; a reinforcing member provided above the buffer portion of the seat along the width direction of the seat; A sheet shutter device having:

2. The sheet shutter device according to claim 1, wherein the reinforcing body is arranged so as to be located in front of the drive unit in the winding direction within the shutter case when the winding of the sheet is completed.

3. The sheet shutter device according to claim 1, wherein a reflective material that reflects light is provided in the buffer section or in the vicinity of the buffer section.

4. The sheet shutter device according to claim 3, wherein the reflective material is visible from diagonally below the shutter case when the winding of the sheet is complete.

5. The sheet shutter device according to claim 1 , wherein the reinforcing member is separable.

6. The sheet shutter device according to claim 1, wherein the cross section of the reinforcing member is circular or polygonal.

Images