Shutter sheet and sheet shutter

Abstract

To provide a shutter sheet that can suppress displacement when it is wound onto a take-up roll.SOLUTION: The shutter sheet comprises a long main body sheet that is wound onto a take-up roll, and a take-up shape stabilizing member that is provided along the longitudinal direction of the main body sheet in the middle of the width direction of the main body sheet and is made of a material with a larger friction coefficient than the main body sheet.SELECTED DRAWING: Figure 5

Description

[Technical Field]

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

[0002] For example, sheet shutters are known, as described in Patent Documents 1 and 2. The sheet shutter includes a main sheet that can open and close an opening in a building. The main sheet is provided with a contact prevention member along the longitudinal direction of the main sheet to prevent damage caused by friction between the main sheet members when it is wound onto a winding roll (also called a winding drum or rotating shaft). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Publication No. 2011-247080 [Patent Document 2] Publication No. 2015-34387 Summary of the Invention [Problem to be solved by the invention]

[0004] In a sheet shutter, it is desirable that the shutter sheet is wound onto the winding roll so as not to be misaligned in the axial direction of the winding roll. In other words, it is desirable that the shutter sheet is not wound irregularly.

[0005] In consideration of the above, the present disclosure aims to provide a shutter sheet and a sheet shutter that can suppress misalignment when wound onto a winding roll. [Means for solving the problem]

[0006] The shutter sheet of the first aspect comprises a long main body sheet that is wound onto a winding roll, and a wound shape stabilizing member that is arranged along the longitudinal direction of the main body sheet at the middle of the width direction of the main body sheet and is made of a material with a higher friction coefficient than the main body sheet.

[0007] In the shutter sheet according to the first aspect, when the shutter sheet is wound onto the winding roll, a winding shape stabilizing member provided at the widthwise middle portion of the main body sheet comes into contact with the adjacent main body sheet. Because the winding shape stabilizing member is made of a material with a higher friction coefficient than the main body sheet, the frictional force between the winding shape stabilizing member and the main body sheet, in other words, the gripping force, is improved compared to when the winding shape stabilizing member is made of a material with a friction coefficient equal to or lower than that of the main body sheet. This makes it possible to suppress misalignment of the shutter sheet in the axial direction of the winding roll when the shutter sheet is wound onto the winding roll.

[0008] The shutter sheet of the second aspect is the shutter sheet of the first aspect, wherein the main body sheet is formed from a first soft vinyl chloride, and the rolled-up shape stabilizing member is formed from a second soft vinyl chloride having a higher coefficient of friction than the first soft vinyl chloride.

[0009] In the shutter sheet of the second aspect, the main body sheet is formed from a first soft vinyl chloride and the rolled-up shape stabilizing member is formed from a second soft vinyl chloride, making it possible to weld the main body sheet and the rolled-up shape stabilizing member together.

[0010] The shutter sheet of the third aspect is the shutter sheet of the first or second aspect, in which the rolled-up shape stabilizing member has a rectangular cross section and the corner on the side opposite the main sheet is rounded.

[0011] When the main body sheet is wound around the winding roll, the winding shape stabilizing member curves so as to fit along the outer peripheral surface of the winding roll. If the wound shape stabilizing member is provided on the opposite side of the main body sheet from the winding roll, when the wound shape stabilizing member is curved, stress is concentrated at the corner on the opposite side from the main body sheet. In the shutter sheet according to the third aspect, the corners on the side opposite to the main body sheet side are rounded, so that stress concentration at the corners when the rolled-up shape stabilizing member is curved can be suppressed.

[0012] The shutter sheet according to the fourth aspect is the shutter sheet according to any one of the first to third aspects, in which the rolled shape stabilizing member is provided only on the rolled outer surface of the main body sheet.

[0013] If the winding shape stabilizing member were provided on the inner winding surface of the main sheet, the winding shape stabilizing member would come into contact with the same point on the outer peripheral surface of the winding roll, but if the winding shape stabilizing member were provided only on the outer winding surface of the main sheet, the flat surface of the main sheet would come into contact with the entire outer peripheral surface of the winding roll, which is preferable as it reduces localized contact.

[0014] The shutter sheet according to the fifth aspect is the shutter sheet according to any one of the first to fourth aspects, in which the rolled shape stabilizing member is divided into multiple parts in the longitudinal direction of the main body sheet.

[0015] When the wound shape stabilizing member is divided into multiple pieces in the longitudinal direction of the main sheet, the length of each wound shape stabilizing member is shorter than when it is not divided, thereby improving the workability when attaching the wound shape stabilizing member to the main sheet.

[0016] The shutter sheet according to a sixth aspect is the shutter sheet according to any one of the first to fifth aspects, in which a band sheet is provided between the main body sheet and the rolled shape stabilizing member.

[0017] For example, if the wound-shape-stabilizing member is thicker than the main body sheet, it takes longer to melt the surface of the wound-shape-stabilizing member than to melt the surface of the main body sheet. If the wound-shape-stabilizing member and the main body sheet are simultaneously heated with hot air to weld them together, the main body sheet will be heated more than necessary, and the heat will affect the area of ​​the main body sheet surrounding the area where the wound-shape-stabilizing member is to be welded. In other words, the area surrounding the area to be welded will be unnecessarily heated. This may cause the main body sheet around the area where the wound-shape-stabilizing member is to be welded to shrink or wrinkle.

[0018] On the other hand, if a band sheet is welded to the main body sheet in advance and then the winding shape stabilizing member is welded to the band sheet, the main body sheet will be thicker and more rigid at the welded portion of the band sheet, making the welded portion of the band sheet less likely to shrink or wrinkle even when heated by the hot air used to melt the winding shape stabilizing member.

[0019] A shutter sheet according to a seventh aspect is the shutter sheet according to the sixth aspect, wherein the width of the band sheet is wider than the width of the wound shape stabilizing member.

[0020] By making the width of the band sheet wider than the width of the winding shape stabilizing member, the rigidity of the welded portion of the band sheet can be increased in the main sheet compared to when the width of the band sheet is narrower than the width of the winding shape stabilizing member.

[0021] A shutter sheet according to an eighth aspect is the shutter sheet according to the sixth or seventh aspect, wherein the thickness of the band sheet is thinner than the thickness of the wound shape stabilizing member.

[0022] If the thickness of the band sheet is equal to or greater than the thickness of the winding shape stabilizing member, there is a risk that the main body sheet will thermally shrink due to the heat generated during welding when the band sheet is welded to the main body sheet. Therefore, it is preferable that the thickness of the band sheet is thinner than the thickness of the winding shape stabilizing member.

[0023] The sheet shutter of the ninth aspect is a sheet shutter that can open and close an opening in a building, and comprises a shutter sheet of any one of the first to eighth aspects and a winding roll that winds up the shutter sheet.

[0024] In the sheet shutter of the ninth aspect, the shutter sheet of any one of the first to eighth aspects is wound up by a winding roll, so that the shifting of the shutter sheet in the axial direction of the winding roll when the shutter sheet is wound up by the winding roll can be suppressed. [Effects of the Invention]

[0025] As described above, the shutter sheet of the present disclosure can suppress misalignment when wound onto a winding roll.

[0026] Furthermore, according to the sheet shutter of the present disclosure, it is possible to suppress misalignment when the shutter sheet is wound onto the winding roll. [Brief explanation of the drawings]

[0027] [Figure 1] FIG. 1 is a perspective view showing a sheet shutter according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a perspective view showing a winding portion of the sheet shutter. [Figure 3] FIG. 4 is a side view of the drive roll showing the gear member and the engagement piece as viewed from the axial direction. [Figure 4] 1A is a perspective view showing a main body sheet to which a roll-up shape stabilizing member is attached, and FIG. 1B is a cross-sectional view showing a main body sheet to which a roll-up shape stabilizing member is attached. [Figure 5] FIG. 2 is a cross-sectional view showing a take-up roll on which the curtain unit according to the embodiment has been wound. [Figure 6] FIG. 10 is a cross-sectional view showing a take-up roll on which a curtain unit according to a comparative example has been taken up. DETAILED DESCRIPTION OF THE INVENTION

[0028] A sheet shutter 10 according to an embodiment of the present disclosure will be described with reference to Figures 1 to 5. Note that, in the figures, arrow H indicates the up-down direction (vertical direction) of the sheet shutter 10, arrow W indicates the width direction (horizontal direction) of the sheet shutter 10, and arrow L indicates the depth direction of the sheet shutter 10 (horizontal direction intersecting with arrow W).

[0029] [Overall structure] The sheet shutter 10 is a sheet shutter that is attached to an opening 11 which is the loading entrance of a building such as a warehouse, and as shown in Figures 1 and 2, it comprises a frame 12, a winding roll 20, a curtain unit 30 as an example of a shutter sheet of the present disclosure, a drive roll 60, and a contact block 80.

[0030] [Frame] 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 vertical direction of the sheet shutter 10 (hereinafter referred to as the "shutter vertical direction") and are arranged on both sides of the delivery entrance in the shutter width direction, at both ends of the curtain unit 30 in the shutter width direction.

[0031] Furthermore, guide rails 14 extending in the vertical direction are disposed inside each of the pair of side frames 22. The pair of guide rails 14 guide the curtain unit 30 in the vertical direction so that the curtain unit 30 moves in the vertical direction.

[0032] Furthermore, a cross section of the guide rail 14 taken in a direction perpendicular to the longitudinal direction has a U-shape with an opening on the inside in the shutter width direction. An engagement piece 40 (details of which will be described later) that constitutes the curtain unit 30 is supported inside the guide rail 14 so as to be movable in the vertical direction.

[0033] [Winding roll] As shown in FIG. 2, the take-up roll 20 is disposed inside the shutter case 18 at one side in the shutter depth direction.

[0034] The winding roll 20 extends in the shutter width direction, and the axial direction of the winding roll 20 is the shutter width direction. Furthermore, the winding roll 20 is rotatably supported by a frame member. The winding roll 20 is biased by a biasing member (not shown) so as to rotate in a direction in which the curtain unit 30 is wound up (hereinafter referred to as the "winding direction").

[0035] In this configuration, a force acts on the curtain unit 30 in the direction in which it is wound by the winding roll 20 .

[0036] [Curtain unit] As shown in Fig. 1, the curtain unit 30 is disposed between a pair of side frames 22 in a state in which it closes an opening 11, which is a loading entrance of a building such as a warehouse. As shown in Fig. 3, the curtain unit 30 comprises a main body sheet 32 ​​and a core material 36 provided at both end portions of the main body sheet 32 ​​in the shutter width direction. Furthermore, the curtain unit 30 comprises a plurality of synthetic resin engaging members 40 attached to both end portions of the main body sheet 32 ​​in the width direction and arranged side by side in the movement direction of the main body sheet 32 ​​(the longitudinal direction of the main body sheet 32; the winding direction of the curtain unit 30), and screws 38 for attaching the engaging members 40 to the main body sheet 32.

[0037] [Sheet curtains, core material] As an example, the main body sheet 32 ​​is formed into a sheet shape by covering a mesh (not shown, plain weave) made of synthetic fiber with soft vinyl chloride, and has a rectangular shape extending in the moving direction of the main body sheet 32. The end of the main body sheet 32 ​​in the moving direction is attached to the winding roll 20.

[0038] The core material 36 extends in the movement direction of the curtain unit 30, and is provided at each end of the width direction of the main sheet 32. The core material 36 used in this embodiment is a rope-like material formed into a circular cross section by twisting together multiple wires made of synthetic resin.

[0039] [Engagement element, screw] The engaging elements 40 are attached to both sides of the main body sheet 32 ​​in the shutter width direction, and as shown in Fig. 3, a plurality of engaging elements 40 are lined up adjacent to each other in the movement direction of the main body sheet 32. In other words, a plurality of engaging elements 40 are lined up adjacent to each other in the winding direction of the curtain unit 30.

[0040] [Drive Roll] 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. In addition, a portion of the curtain unit 30 that is wound by the winding roll 20 or that is unwound from the winding roll 20 is wound around the drive roll 60.

[0041] The drive roll 60 extends in the shutter width direction, with the axial direction of the drive roll 60 being the shutter width direction. Furthermore, the drive roll 60 is rotatably supported by a frame member (not shown). The drive roll 60 also includes a roll body 62 extending in the shutter width direction, and a pair of gear members 64 attached to both ends of the roll body 62 in the shutter width direction. The drive roll 60 is rotated in both positive and negative directions (K01 direction and K02 direction in FIG. 3) by the driving force transmitted from a motor (not shown).

[0042] 2 and 3, the gear member 64 is made of metal and has an annular shape, and a plurality of engaging recesses 66 that engage with the engaging portions 54 of the engaging pieces 40 are formed lined up in the circumferential direction on the outer peripheral surface of the gear member 64. Furthermore, a flange 78 that protrudes radially outward relative to other portions is formed on the outer portion of the gear member 64 in the shutter width direction, but the flange 78 may also be formed on the inner portion of the gear member 64 in the shutter width direction.

[0043] [Contact block] A pair of contact blocks 80 are provided, and as shown in Fig. 2, they are arranged inside the shutter case 18 at the other side in the shutter depth direction and at both end portions in the shutter width direction. Specifically, as shown in Fig. 3, the contact blocks 80 are arranged on opposite sides of the outer periphery of the gear member 64, with the engaging element 40 sandwiched between them. The contact blocks 80 are formed in an arc shape using a metal material, and are attached to a frame member (not shown).

[0044] 2, a band-shaped wound shape stabilizing member 58 extending in the sheet longitudinal direction (winding and unwinding direction) is provided only on the outer winding surface side of the main sheet 32. A plurality of wound shape stabilizing members 58 (three in this embodiment) are provided at intervals in the sheet width direction. In this embodiment, a band sheet 56 is interposed between the wound shape stabilizing member 58 and the main sheet 32.

[0045] The band sheet 56 is formed in a band shape from the same material as the main sheet 32. That is, the band sheet 56 is a band-shaped sheet in which a mesh (not shown, plain weave) made of synthetic fiber is covered with soft vinyl chloride, and the thickness of the band sheet 56 is the same as that of the main sheet 32. The band sheet 56 is welded to the main sheet 32. The thickness of the main sheet 32 ​​(ta: see FIG. 4(A)) and the thickness of the main sheet 32 ​​(tb: see FIG. 4(A)) are, for example, 0.8 mm, but this thickness can be increased or decreased as needed.

[0046] The wound shape stabilizing member 58 is a member made of soft vinyl chloride and having a rectangular cross section, which is thicker than the main body sheet 32 ​​and the band sheet 56 and narrower than the band sheet 56. In other words, the band sheet 56 is wider than the wound shape stabilizing member 58.

[0047] The wound shape stabilizing member 58 of this embodiment is formed of soft vinyl chloride (second soft vinyl chloride of the present disclosure) having a higher coefficient of friction than the soft vinyl chloride of the main body sheet 32 ​​(first soft vinyl chloride of the present disclosure). The hardness Hs of the soft vinyl chloride used for the wound shape stabilizing member 58 of this embodiment is 60°, but the hardness can be changed as needed. The soft vinyl chloride of the wound shape stabilizing member 58 is softer (has a lower hardness Hs) than the soft vinyl chloride of the main body sheet 32.

[0048] Fig. 4(B) shows a cross section of the wound shape stabilizing member 58 in a direction perpendicular to the longitudinal direction. The corners on the side opposite to the band sheet 56 side (main body sheet 32 ​​side) are rounded (with a radius R). As shown in Fig. 4(A), the wound shape stabilizing member 58 of this embodiment has, as an example, a width Wa of 20 mm, a height H of 12 mm, and a corner curvature radius R of 3 mm. Note that these dimensions are merely examples and may be changed as needed.

[0049] The width Wb of the band sheet 56 is wider than the width Wa of the winding shape stabilizing member 58, and in this embodiment, the width Wb of the band sheet 56 is 25 mm. Note that the width Wb of the band sheet 56, 25 mm, is just an example and may be changed as needed. The winding shape stabilizing member 58 is welded to the band sheet 56 .

[0050] (Action, effect) Fig. 5 shows a cross section along the axis of the winding roll 20 around which the curtain unit 30 of this embodiment has been wound. Fig. 6 shows a cross section along the axis of the winding roll 20 around which the curtain unit 130 according to a comparative example, which is not provided with a wound shape stabilizing member 58, has been wound.

[0051] In the comparative example curtain unit 130 shown in Figure 6, due to the difference in thickness between the engaging element 40 and the main body sheet 32, the central portion of the main body sheet 32 ​​in the sheet width direction sags under its own weight, and the main body sheet 32 ​​is pulled toward the center in the sheet width direction, causing the curtain unit 130 to become irregularly wound on the winding roll 20.

[0052] If the curtain unit 130 becomes irregularly wound, the center of gravity of the wound curtain unit 130 may become uneven, or the durability of the main sheet 32 ​​may decrease due to friction between the main sheet 32 ​​and the inside of the shutter case 18 (not shown in Figure 6).

[0053] Furthermore, when the main sheet 32 ​​is pulled toward the center of the sheet width direction when the curtain unit 130 is being wound up, the engaging element 40 of the curtain unit 130 may enter obliquely into the engaging recess 66 of the gear member 64 that performs the opening and closing operation, which may cause various problems such as resistance and wear of the engaging element 40.

[0054] On the other hand, when the main body sheet 32 ​​is provided with a roll-up shape stabilizing member 58 as in this embodiment, slack in the main body sheet 32 ​​can be suppressed as shown in Fig. 5. In addition, friction between the main body sheets 32 can be suppressed.

[0055] Furthermore, in this embodiment, when the curtain unit 130 is wound onto the winding roll 20, the top of the wound shape stabilizing member 58, which is made of soft vinyl chloride having a higher coefficient of friction than the soft vinyl chloride of the main body sheet 32, comes into contact with the surface of the main body sheet 32 ​​(the surface on which the wound shape stabilizing member 58 is not formed). Therefore, the friction between the wound shape stabilizing member 58 and the main body sheet 32 ​​is greater than the friction between the main body sheets 32 themselves, and as a result, it is possible to suppress misalignment of the main body sheet 32 ​​in the sheet width direction, and to suppress winding irregularities due to misalignment in the sheet width direction.

[0056] When the main body sheet 32 ​​is wound onto the winding roll 20 and curved, a longitudinal tensile force acts on the top side (the side opposite the main body sheet 32) of the wound-shape stabilizing member 58, and tensile stress tends to concentrate at the corners on the top side. However, in the wound-shape stabilizing member 58 of this embodiment, the corners on the top side are rounded, which reduces stress concentration at the corners. As a result, cracks are prevented from occurring at the corners of the wound-shape stabilizing member 58, and the durability of the wound-shape stabilizing member 58 can be improved.

[0057] In this embodiment, the winding shape stabilizing member 58 is provided on the winding outer surface of the main body sheet 32. Therefore, the winding shape stabilizing member 58 is configured not to come into contact with the outer peripheral surfaces of the winding roll 20 and the roll body 62 of the drive roll 60. Therefore, the flat surface of the main body sheet 32 ​​comes into contact with the entire outer peripheral surfaces of the winding roll 20 and the roll body 62, which is preferable as it prevents localized contact.

[0058] (Welding process of main body sheet, band sheet, and winding shape stabilizing member) An example of a process for welding the band sheet 56 and the winding shape stabilizing member 58 to the main body sheet 32 ​​will be described below.

[0059] (1) Hot air is blown onto the surface of the main sheet 32 ​​(the portion to which the band sheet 56 is welded) and the surface of the band sheet 56 to melt the surfaces of the main sheet 32 ​​and the band sheet 56, and then the band sheet 56 is pressed against the main sheet 32 ​​in the longitudinal direction of the band sheet using a pressing roller or the like. This allows the band sheet 56 to be welded to the main sheet 32.

[0060] (2) After welding of the band sheet 56 is completed, hot air is blown onto the surface of the band sheet 56 (the portion to which the winding shape stabilizing member 58 is welded) and the surface of the winding shape stabilizing member 58 to melt the surface of the band sheet 56 and the surface of the winding shape stabilizing member 58, and a pressing roller or the like is used to press the winding shape stabilizing member 58 sequentially along the hand direction of the band sheet 56. This allows the winding shape stabilizing member 58 to be welded to the band sheet 56.

[0061] However, since the wound shape stabilizing member 58 is thicker than the main body sheet 32 ​​and the band sheet 56 (for example, the wound shape stabilizing member 58 is 12 mm thick, and the main body sheet 32 ​​and the band sheet 56 are 0.8 mm thick), it takes longer to melt the surface of the wound shape stabilizing member 58 than to melt the surfaces of the main body sheet 32 ​​and the band sheet 56. Therefore, if the wound-shape-stabilizing member 58 and the main body sheet 32 ​​are heated simultaneously with hot air, the main body sheet 32 ​​will be heated more than necessary, and the heat will affect the area around the area where the wound-shape-stabilizing member 58 is welded to the main body sheet 32. In other words, the area around the area to be welded will be unnecessarily heated. This may cause the main body sheet 32 ​​around the area where the wound-shape-stabilizing member 58 is welded to shrink or wrinkle.

[0062] On the other hand, in the case of the present embodiment, where the band sheet 56 is welded onto the main body sheet 32 ​​in advance and the wound shape stabilizing member 58 is welded onto the band sheet 56, the thickness of the main body sheet 32 ​​at the welded portion of the band sheet 56 increases (doubled in this embodiment), and the rigidity increases. Therefore, the welded portion of the band sheet 56 is less likely to shrink or wrinkle even when heated by the hot air used to melt the wound shape stabilizing member 58.

[0063] In this embodiment, the width of the band sheet 56 is made wider than the width of the winding shape stabilizing member 58, so that the rigidity of the welded portion of the band sheet 56 in the main body sheet 32 ​​can be increased compared to when the width of the band sheet 56 is made narrower than the width of the winding shape stabilizing member 58.

[0064] [Other embodiments] The above describes one embodiment of the present disclosure, but the present disclosure is not limited to the above, and it goes without saying that various modifications can be made to the present disclosure without departing from the spirit of the present disclosure.

[0065] In the above embodiment, the wound-up shape stabilizing member 58 extends continuously in the longitudinal direction of the main body sheet 32, but the wound-up shape stabilizing member 58 does not necessarily have to extend continuously in the longitudinal direction, and may be divided partway along the longitudinal direction. The wound-up shape stabilizing member 58 may be divided into multiple pieces in the longitudinal direction of the main body sheet 32. When the wound-up shape stabilizing member 58 is divided into multiple pieces in the longitudinal direction of the main body sheet 32, the length of each wound-up shape stabilizing member 58 is shorter than when it is not divided, and this improves the workability when attaching the wound-up shape stabilizing member 58 to the main body sheet 32.

[0066] In the above embodiment, the material constituting the wound shape stabilizing member 58 is soft vinyl chloride, but any synthetic resin other than soft vinyl chloride may be used as long as it has a higher coefficient of friction than the main body sheet 32 ​​.

[0067] The band sheet 56 of this embodiment is formed in a band shape from the same material as the main body sheet 32, so there is no need to increase the number of types of sheet materials.

[0068] In the above embodiment, the main body sheet 32, the band sheet 56, and the take-up shape stabilizing member 58 are heated and welded together with hot air, but they may also be heated and welded together by other conventionally known methods. [Explanation of symbols]

[0069] 20 Winding roll 30 Curtain unit (shutter sheet) 32 Main sheet 56 Belt Sheet 58 Winding shape stabilizing member

Claims

1. a long main body sheet wound around a winding roll; a roll-up shape stabilizing member provided in a widthwise intermediate portion of the main body sheet along the longitudinal direction of the main body sheet and made of a material having a larger coefficient of friction than the main body sheet; A shutter sheet having a shutter sheet.

2. The main body sheet is formed of a first soft vinyl chloride, the winding shape stabilizing member is formed of a second soft vinyl chloride having a larger coefficient of friction than the first soft vinyl chloride; The shutter sheet according to claim 1 .

3. The roll-up shape stabilizing member has a rectangular cross section, and a corner on the side opposite to the main body sheet side is rounded. The shutter sheet according to claim 1 .

4. The roll-up shape stabilizing member is provided only on the roll-up outer surface of the shutter sheet. The shutter sheet according to claim 1 .

5. The roll-up shape stabilizing member is divided into a plurality of parts in the longitudinal direction of the main body sheet. The shutter sheet according to claim 1 .

6. A band sheet is provided between the main body sheet and the winding shape stabilizing member. The shutter sheet according to claim 1 .

7. The width of the strip sheet is wider than the width of the winding shape stabilizing member. The shutter sheet according to claim 6.

8. The thickness of the strip sheet is thinner than the thickness of the winding shape stabilizing member. The shutter sheet according to claim 6 or 7.

9. A sheet shutter that can open and close an opening in a building, The shutter sheet according to any one of claims 1 to 8; a winding roll that winds up the shutter sheet; having Sheet shutter.

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