Sheet shutter

Abstract

To improve the airtightness of the lower end of a sheet when the opening part of a sheet shutter is in an entirely closed state.SOLUTION: In a shutter curtain S which consists of a main sheet 10, left and right end sheets 2, and multiple guide elements 2A provided at the end parts of the end sheets 2, the end sheet 2 includes, in a state where the opening part is entirely closed, a first part 20' located inside a guide rail 5 together with the guide element 2A and a second part 21' located externally of the guide rail 5, a gap filling sheet 9 is provided at the lower end of the guide rail 5, and the lower end of the gap filling sheet 9 is in contact with the floor surface, and in the opening part entirely closed state, the gap filling sheet 9 faces the lower end of the second part 21'of the end sheet 2.SELECTED DRAWING: Figure 13

Description

[Technical Field]

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

[0002] Sheet shutters open and close openings using a sheet-like shutter curtain, but some shutters have guide elements formed along the height direction at both ends of the width of the shutter curtain that move vertically within guide grooves on the left and right sides of the opening, allowing the opening to be opened and closed at high speed (Patent Document 1).

[0003] When the opening is fully closed, both widthwise ends of the shutter curtain are positioned within the guide grooves on the left and right sides of the opening, and the opening is closed when the bottom sheet attached to the lower end of the shutter curtain is placed on the floor. However, since it is difficult to attach a bottom sheet to both widthwise ends of the shutter curtain, there is a risk that gaps will form between the both widthwise ends of the bottom sheet and the parts located outside the guide grooves and the floor surface due to, for example, unevenness.

[0004] In some openings where this type of sheet shutter is installed, airtightness is required even when the opening is fully closed, so there is a desire to prevent air from flowing between indoors and outdoors through gaps that may form at the bottom end of the shutter curtain when the opening is fully closed. [Patent Document 1] Patent Publication No. 2017-89195 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0005] The present invention aims to improve the airtightness of the lower end of the sheet when the opening of the sheet shutter is in a fully closed state. [Means for solving the problem]

[0006] The technical means adopted by the present invention are: A shutter curtain comprising a main sheet, left and right end sheets connected to both widthwise ends of the main sheet, and a plurality of guide elements provided at the ends of the end sheets in the height direction; Left and right guide rails are provided at both ends of the opening in the width direction, and receive the guide element and guide it in the height direction; Equipped with The end seat has a first portion positioned inside the guide rail together with the guide element when the opening is fully closed, and a second portion positioned outside the guide rail, A gap closing sheet is provided at the lower end portion of each of the left and right guide rails, and the lower end portion of the gap closing sheet is in contact with the floor surface outside the guide rail, and when the opening is in a fully closed state, the gap closing sheet faces the lower end portion of the second part of the end sheet. It's a sheet shutter.

[0007] In one aspect, the gap-blocking sheet has a vertical portion that extends in the forward direction opposite the lower end portion of the second portion of the end sheet when the opening is fully closed, and a lower portion that curves from the lower end of the vertical portion in a direction away from the second portion of the end sheet and fits closely to the floor surface.

[0008] In one embodiment, a bottom plate is provided at the lower end of the guide rail, and an upper surface of the bottom plate is located higher than the floor surface, Lower ends of at least the first portion and the second portion of the end sheet adjacent to the first portion are located higher than lower ends of the width direction ends of the main sheet, When the opening is fully closed, the lower end of the main sheet is in contact with the floor surface, and the first portion of the end sheet is placed on the bottom plate.

[0009] In one embodiment, the end sheet comprises a first end sheet (end sheet 2) having the guide element, and a second end sheet (intermediate end sheet 3) connected to the widthwise ends of the first end sheet and the main sheet, The lower end (32) of the second end sheet is at approximately the same height as the lower end of the width direction end of the main sheet, The lower end (22) of the first end sheet is located higher than the width direction end of the main sheet and the lower end (32) of the second end sheet, The first end sheet has a widthwise leading end portion (20) having the guide element and a widthwise base end portion (21), a widthwise base end portion (30) of the second end sheet is connected to a widthwise end portion (11) of the main sheet in an overlapping state, and a widthwise tip end portion (31) of the second end sheet is connected to the widthwise base end portion (21) of the first end sheet in an overlapping state; The lower end of the widthwise tip end portion (20) of the first end sheet is the lower end of "the portion of the first portion (20') and the second portion (21') of the end sheet adjacent to at least the first portion (20')."

[0010] In one embodiment, the pair of gap blocking sheets are provided so as to sandwich the shutter core. In a more specific aspect, one of the gap blocking sheets is located on the outside of the room when the opening is fully closed, and has a vertical portion that extends in the forward direction facing the lower end portion of the second portion of the end sheet, and a lower portion that curves from the lower end of the vertical portion in a direction away from the second portion of the end sheet (toward the outside of the room) and comes into close contact with the floor surface, The other gap-blocking sheet is positioned on the inside of the room when the opening is fully closed, and has a vertical portion that extends in the forward direction opposite the lower end of the second part of the end sheet, and a lower portion that curves from the lower end of the vertical portion in a direction away from the second part of the end sheet (towards the inside of the room) and fits closely to the floor surface.

[0011] In one embodiment, the guide rail has a pair of side edges, a support member is provided that is positioned outside one or both of the pair of side edges of the guide rail and extends in the forward direction, the gap blocking sheet includes a sheet body that forms the vertical portion and the lower portion, and a fixing portion, The fixing portion of the gap blocking sheet is detachably provided on the support member. The gap blocking sheet may be positioned only on the outside of one of the pair of side edges of the guide rail, or may be a pair of gap blocking sheets positioned on the outside of both of the pair of side edges of the guide rail.

[0012] In one embodiment, a bracket having a U-shaped cross section formed from a pair of side edges and a bottom edge is provided at the lower end of the guide rail, with each side edge positioned outside the respective side edges of the guide rail and the bottom edge positioned outside the bottom of the guide rail, The support member is formed from the side edge of the bracket. The fixing portion of the gap blockage sheet may be fixed directly to the base end portion of the guide rail (for example, the base portion 51 described later) using a plate-shaped support member.

[0013] In one aspect, when the opening is fully closed, the guide rail is movable in the opening width direction and swingable in the front-rear direction of the opening in accordance with the movement of the shutter curtain, When the opening is fully closed, the bracket is free to move in the opening width direction together with the guide rail and to swing back and forth in the opening direction in accordance with the movement of the shutter curtain, and the gap blocking sheet is movable in accordance with the movement of the shutter curtain. [Effects of the Invention]

[0014] According to the present invention, a gap sealing sheet is provided at the lower end of each guide rail, and the lower end of the gap sealing sheet is in contact with the floor surface outside the guide rail.When the opening is fully closed, the gap sealing sheet faces the lower end of the portion of the end sheet at both ends of the shutter curtain in the width direction that is located outside the guide rail.Therefore, even if a gap is created between such a portion and the floor surface, the gap is covered by the gap sealing sheet, thereby preventing as much as possible the flow of air inside and outside the room through the gap. [Brief explanation of the drawings]

[0015] [Figure 1] The upper figure is a front view of the sheet shutter (with the opening fully open), and the lower figure is a cross-sectional view of the sheet shutter. [Figure 2] FIG. 1 is a vertical cross-sectional view of a sheet shutter (with the opening fully open). [Figure 3] The upper figure is a top view of the guide rail assembly, and the lower figure is a cross-sectional view of the guide rail assembly. [Figure 4] The left figure is a front view of the guide rail assembly (viewed from the front), and the right figure is a front view of the guide rail assembly (viewed from the front). [Figure 5] 1A and 1B are a front view and a longitudinal cross-sectional view of a shutter curtain. [Figure 6] FIG. 2 is a partially enlarged view of the widthwise end and lower end of the shutter curtain. [Figure 7] FIG. 10 is a partial enlarged view of the widthwise end and lower end portion of the shutter curtain (without the bottom weight and cushioning material provided). [Figure 8] This is a partially enlarged view of the lower end portion of the left side of Figure 4, including the gap closing mechanism as seen from the front (projection direction). [Figure 9] This is a partial cross-sectional view of one side of the opening width direction of the sheet shutter (when the opening is fully closed), including a gap closing mechanism as seen from above. [Figure 10] This is a partially enlarged view of the lower end portion of the right side of Figure 4, including the gap closing mechanism as seen from the front direction. [Figure 11] The upper figure is a partial cross-sectional view of one side of the opening width direction of the sheet shutter (when the opening is fully closed), and includes the gap sealing mechanism (the lower part of the sheet body is shown by a two-dot chain line) seen from above, the middle figure is a plan view of the gap sealing mechanism (the lower part of the sheet body is shown by a two-dot chain line), and the lower figure is a view of the gap sealing mechanism (the state before the lower part of the sheet body is folded) seen from the forward direction, with the gap sealing sheet shown on the right side of the middle figure. [Figure 12] The top figure is a partial cross-sectional view of one side of the opening width direction of the sheet shutter (when the opening is fully closed), including the gap sealing mechanism viewed from above, the middle figure is a plan view of the gap sealing mechanism, and the bottom figure is a view of the gap sealing mechanism from the front direction. [Figure 13] FIG. 4 is an enlarged plan view of the gap closing mechanism. DETAILED DESCRIPTION OF THE INVENTION

[0016] [A] Overall structure of sheet shutter An embodiment of the present invention will be described with reference to the drawings. Figs. 1 and 2 are a front view and a longitudinal cross-sectional view (with the opening fully open) of a sheet shutter, respectively. The sheet shutter of this embodiment opens and closes an opening using a sheet-like shutter curtain S. As shown in Figs. 5 to 7, the shutter curtain S of this embodiment comprises a main sheet 1, left and right end sheets 2 located at both widthwise ends of the shutter curtain S, and an intermediate end sheet 3 connecting both widthwise ends of the main sheet 1 to the left and right end sheets 2. Guide elements 2A are provided along the height direction at both widthwise edges of the shutter curtain S, i.e., at the edges of the end sheets 2.

[0017] A bag-shaped portion 10 extending in the width direction of the shutter curtain S (opening) is formed at the lower end of the main sheet 1 of the shutter curtain S by folding back and welding or sewing the lower part of the sheet. The bag-shaped portion 10 is provided with a pipe-shaped buffer material 10a extending in the width direction of the opening, and bottom weights 10b are provided on both sides of the buffer material 10a. The specific configuration of the bag-shaped portion 10 and the number and arrangement of the bottom weights are not limited.

[0018] On both the left and right sides of the opening in the width direction, guide rail assemblies 4 are erected, extending vertically in the height direction, and both widthwise ends of the shutter curtain S, more specifically, the edge of the end sheet 2 (the first part 20' described below) and the guide element 2A, are received in the guide groove 500 of the guide rail 5 of the guide rail assembly 4 and guided in the height direction.

[0019] A shutter case 6 is provided above the opening, and inside the shutter case 6 are disposed a winding shaft 7 extending horizontally in the opening width direction, and an opening / closing device M that rotates the winding shaft 7. The upper end of the main sheet 1 of the shutter curtain S is connected to the winding shaft 7, and when the opening is opened or closed, the opening / closing device M is driven by instructions from the operating unit SW to rotate the winding shaft 7 in a first direction or a second direction, whereby the shutter curtain S rises or falls while being guided by the guide rails 5 at both its left and right ends (the edges of the end sheet 2 and the guide element 2A) and is wound onto or unwound from the winding shaft 7.

[0020] In this embodiment, the guide element 2A is provided continuously in the vertical direction along the edge of the end sheet 2. Such a guide element 2A can be formed from one fastener element of a pair of fasteners. The form of the guide element 2A is not limited to this, and the guide element may be formed from a plurality of guide blocks provided at intervals in the vertical direction along the edge of the end sheet 2.

[0021] 3 and 4, the configuration of the guide rail assembly 4 will be described in detail. The guide rail assembly 4 comprises a long guide rail 5 extending in the opening height direction, a guide rail support part 40 extending in the opening height direction, and a base 41 to which the guide rail support part 40 is fixed. The guide rail support part 40 and the base 41 have a height that extends from the floor surface to the underside of the shutter case 5, while the upper end of the guide rail 5 is located a predetermined distance below the underside of the shutter case 5.

[0022] As shown in the lower diagram of Figure 3, the guide rail 5 has opposing side edges 50, 50, and a guide groove 500 is formed between the pair of side edges 50, and the guide groove 500 receives the widthwise end of the shutter curtain S (the edge of the end sheet 2 and the guide element 2A) and guides it up and down. The end sheet 2 is formed from a thin sheet, and the opening groove 501 of the guide groove 500 formed between the tips of the side edges 50 is narrow enough to allow the end sheet 2 to pass through. The guide rail 5 is formed from an elastic material, such as resin, and when a force greater than a predetermined level is applied, the side edges 50 of the guide rail 5 deform and the opening groove 501 expands, allowing the guide element 2A at the edge of the end sheet 2 of the shutter curtain S to slip out of the guide groove 500.

[0023] An upper guide 5' is provided above the guide rail 5. The upper and lower ends of the upper guide 5' are open. More specifically, as shown in Figures 1, 2, and 4, the outer shape and internal space of the upper guide 5' gradually widen upward at the upper end and gradually widen downward at the lower end. In the illustrated embodiment, the upper guide 5' is connected to the guide rail support part 40, similar to the guide rail 5. The upper end of the upper guide 5' reaches the underside of the shutter case 5. The lower end of the upper guide 5' and the upper end of the guide rail 5 are spaced apart, and an opening (automatic return opening C formed in the guide rail) is formed to return the sheet end (the edge of the end sheet 2 and the guide element 2A) that has separated from the guide rail 5.

[0024] As shown in the upper diagram of Figure 3, the guide groove (internal space) 50' of the upper guide 5' has a cross-sectional shape and dimensions that allow it to receive the guide element 2A and guide it up and down, and although there is an opening C between the guide groove 50' of the upper guide 5' and the guide groove 500 of the guide rail 5, they essentially form a continuous guide groove, so that both widthwise end portions (the edge of the end sheet 2 and the guide element 2A) can be well guided up and down when the shutter curtain S is raised and lowered.

[0025] The sheet shutter of this embodiment has a function for releasing the sheet edge from the guide rail 5 and a function for automatically returning the released edge to the guide rail 5. The sheet edge is configured to release from the guide rail 5 when a load greater than a predetermined value is applied to the sheet, thereby preventing damage to the sheet and / or the guide rail 5. A return gap or opening C is formed above the guide rail 5 or midway in the height direction (below the upper guide 5' in this embodiment). When the edge of the end sheet 2 and the guide element 2A of the shutter curtain S release from the guide rail 5, the shutter curtain S is raised, and the released edge of the end sheet 2 and the guide element 2A are guided back through the opening C into the guide groove 50' of the upper guide 5' and returned. When the sheet is lowered from this state, the sheet edge is guided within the guide groove 50' and guide groove 500 and lowered. Figures 1 and 2 show the opening in a fully open state, and in this embodiment, the lower portion of the end sheet 2 of the shutter curtain S is located within the upper guide 5', and the lower end of the end sheet 2 is located at a height spaced above the upper end of the guide rail 5.

[0026] The guide rail 5 is connected at its bottom side to a connecting means, and is supported by the guide rail support part 40 so as to be swingable in the front-to-rear direction and movable in the width direction. The guide rail support part 40 has a U-shaped cross section made up of a built-in wall 400 and a pair of visible walls 401, 401, and a pair of rear edges 512 of the base 51 of the guide rail 5 abuts or is close to the built-in wall 400, and the pair of side edges 511, 511 of the base 51 of the guide rail 5 and the pair of visible walls 401, 401 of the guide rail support part 40 face each other at a distance. The visible width of the guide rail 5 and the visible width of the guide rail support part 40 are approximately the same, but in the illustrated embodiment, the tip of the guide rail 5 (opening groove 501) protrudes (towards the opening) slightly beyond the tip of the visible wall 401 of the guide rail support part 40.

[0027] A bottom plate 45 is provided at the lower end of the internal space of the guide rail assembly 4, more specifically, at the lower end of the space enclosed by the built-in wall 400 of the guide rail support portion 40 and the pair of built-in walls 401, 401 (including the lower portion of the space occupied by the lower end of the guide rail 5). The bottom plate 45 rests on the floor, and the upper surface of the bottom plate 45 is slightly higher than the floor (by the thickness of the bottom plate 45). The lower end of the guide rail 5 is located slightly above the upper surface of the bottom plate 45 or is close to the upper surface of the bottom plate 45 while being horizontally movable relative to it. The bottom plate 45 is rectangular so as to fill almost the entire space at the lower end of the guide rail assembly 4, and is fixed to the guide rail support portion 40 by connecting a rising vertical edge 450 to the lower end of the built-in wall 400 of the guide rail support portion 40 with screws. The specific mounting configuration of the bottom plate 45 to the lower end of the guide rail assembly 4 is not limited.

[0028] 3, in this embodiment, the connecting means is a shaft member (bolt) 42 having a first end and a second end, and the first end side of the shaft member 42 is inserted into a receiving hole (which has play to allow the shaft member 42 to swing) formed in the planar wall 400 of the guide rail support part 40 and is positioned inside the base part 51, and a first large diameter part (head part) 420 having a diameter larger than the shaft diameter is formed at the first end. The second end side of the shaft member 42 is positioned inside the base 41, and a second large diameter part (nut) 43 having a diameter larger than the shaft diameter is provided at the second end.

[0029] A base 51 is integrally formed on the bottom side of the guide groove 500, and receives a head 420 of a shaft member (bolt) 42 for coupling with the guide rail support part 40. The base 51 includes a front side 510 integrally formed with the base end side of the side side 50, a pair of opposing side sides 511, 511, and a pair of rear sides 512, 512 behind the side sides 511, 511. The head 420 of the shaft member (bolt) 42 is housed in a loosely fitted state in the space surrounded by the front side 510, the side sides 511, 511, and the rear sides 512, 512, and the shaft part of the shaft member (bolt) 42 is inserted through the gap between the rear sides 512, 512.

[0030] Inside the base 41, the shaft member 42 is fitted with a coil spring 44 located between the second large diameter portion 43 and the projecting wall 410. The guide rail 5 is movable in the opening width direction (X direction in FIG. 3) and swingable in the front-to-back direction of the opening (Y direction in FIG. 3), and is movable in accordance with the movement of the shutter curtain S. Note that the configuration of the guide rail 5, which is movable in the opening width direction and swingable in the front-to-back direction of the opening, is not limited to the configuration shown in the figure. Such movable guide rails are well known, and although a coil spring 44 is shown in the figure, an elastic member such as rubber may also be used.

[0031] [B] Shutter curtain configuration The shutter curtain S according to this embodiment comprises a main sheet 1, left and right end sheets 2 located at both widthwise ends of the shutter curtain S, and an intermediate end sheet 3 connecting both widthwise ends of the main sheet 1 to the left and right end sheets 2. Guide elements 2A are provided along the height direction at both widthwise edges of the shutter curtain S, i.e., at tip end portions 20 of the end sheets 2.

[0032] The width of the main sheet 1 is slightly smaller than the opening width, and the first portion 20' on the widthwise tip side of the end sheet 2 and the guide element 2A are located inside the guide rail 5, while the second portion 21' on the widthwise base side of the end sheet 2 and the intermediate end sheet 3 are located outside the guide rail 5 (FIG. 13). In this embodiment, the tip side (the side with the guide element 2A) of the tip side region 20 of the end sheet 2 becomes the first portion 20', and the remaining portion on the base side of the tip side region 20 forms part of the second portion 21'. It will be understood by those skilled in the art that the portions of the end sheet 2 that become the first portion 20' and the second portion 21' may change depending on the surface pressure acting on the shutter curtain S, etc. (the position of the end sheet 2 relative to the opening groove 501 of the guide rail 5 may change in the opening width direction).

[0033] The main sheet 1 and the end sheet 2 are integrated via an intermediate end sheet 3. One widthwise half 30 of the intermediate end sheet 3 is overlapped and bonded (welded) to both widthwise end portions 11 of the main sheet 1, and the other widthwise half 31 of the intermediate end sheet 3 is overlapped and bonded (bonded via an adhesive) to the base end portion 21 of the end sheet 2. In this specification, bonding includes welding (including via a welded seal), bonding using an adhesive, bonding using double-sided tape, etc. Furthermore, the sheets are not limited to being connected by bonding, but may also be sewn.

[0034] In this embodiment, the main sheet 1 is made of a polyester base fabric and a vinyl chloride surface, the intermediate end sheet 3 is made of a polyester base fabric and a vinyl chloride surface, and the end sheet 2 is made of polyester. The materials of the main sheet 1, end sheet 2, and intermediate end sheet 3 are not limited to those mentioned above and can be selected appropriately by those skilled in the art.

[0035] The lower end portion of the other half portion 31 of the intermediate end sheet 3 and the lower end portion of the base end portion 21 of the end sheet 2 are overlapped and welded together, and are then crimped and fixed by a peel-preventing means 23. The peel-preventing means 23 comprises a first head portion that adheres to the intermediate end sheet 3 at the overlapping portion, a second head portion that adheres to the end sheet 2 at the overlapping portion, and a shaft portion that penetrates the overlapping portion and connects the first and second head portions. In this embodiment, a ring-shaped resin washer is interposed between the intermediate end sheet 3 and the first head portion. The adhesion between the intermediate end sheet 3 and the end sheet 2 is maintained at the overlapping portion, i.e., the lower end portion of the adhesive joint, preventing peeling between the intermediate end sheet 3 and the end sheet 2. Preventing peeling at the lower end portion of the adhesive joint also minimizes peeling from the lower end upward. For details about the peel-preventing means 23, see Patent Document 1.

[0036] As shown in Figure 7, the lower end of the widthwise end 11 of the main sheet 1 and the lower end 32 of the intermediate end sheet 3 are aligned (height position is L1), and the height position L2 of the lower end 22 of the end sheet 2 is located slightly above height position L1. In this embodiment, the gap between height positions L1 and L2 is approximately equal to the thickness of the bottom plate 45. When the opening is fully closed, the bag-shaped portion 10 at the lower end of the shutter curtain S is adapted to rest on the floor, and the lower end of the first portion 20' of the end sheet 2 is adapted to contact the upper surface of the bottom plate 45 located at the lower end of the guide rail 5.

[0037] As described above, the end sheet 2 includes a first portion 20' located inside the guide rail 5 together with the guide element 2A when the opening is fully closed, and a second portion 21' located outside the guide rail 5 (FIG. 13). When the opening is fully closed, the bag-shaped portion 10 at the lower end of the main sheet 1 is placed on the floor, and the lower end of the first portion 20' of the end sheet 2 is placed on the upper surface of the bottom plate 45. In this embodiment, the tip side (the side with the guide element 2A) of the tip side portion 20 (height position L2 of the lower end 22) of the end sheet 2 is the first portion 20', and the remaining portion on the base end side of the tip side portion 20 forms part of the second portion 21'. In the second portion 21' of the end sheet 2, a gap may be formed between the floor and the lower end 22 (height position L2) of the portion adjacent to the first portion 20' (the remaining portion of the tip side portion 20 of the end sheet 2).

[0038] [C] Gap-closing mechanism A gap closing mechanism consisting of a bracket 8 and a gap closing sheet 9 is provided at the lower end of the guide rail 5. The lower end of the gap closing sheet 9 is in contact with the floor surface outside the guide rail 5, and when the opening is fully closed, the gap closing sheet 9 faces the lower end of the second portion 21' of the end sheet 2.

[0039] In this embodiment, a pair of gap blocking sheets 9 are provided so as to sandwich the shutter core S1 (FIG. 11). The pair of gap blocking sheets 9 are detachably fixed to the bracket 8. A pair of gap blocking sheets 9 is provided at the lower end portions of the left and right guide rails 5 so as to sandwich the shutter core S1, and the lower end portions 9 of the gap sheets are in contact with the floor surface outside the guide rails and face each other so as to sandwich the lower end portions of the second portions 21' of the end sheets 2 from inside and outside the room when the opening is fully closed.

[0040] 11, 12, and 13, the bracket 8 has a U-shaped cross section made up of a bottom edge (visible edge) 80 and a pair of side edges (visible edges) 81, and an insertion hole 800 is formed in the bottom edge 80. The bracket 8 is positioned so that the bottom edge 80 is sandwiched between the visible wall 400 of the guide rail support portion 40 and the rear edge 512 of the base 51 of the guide rail 5, and the base 51 of the guide rail 5 is sandwiched between the pair of side edges 81, and is supported at the lower end portion of the guide rail assembly 4 by an axial member (bolt 42) that passes through the gap between the pair of rear edges 512, the insertion hole 800, and the visible walls 400.

[0041] The inner surface of the base end portion of each side edge 81 of the bracket 8 is in contact with or close to each side edge 511 of the base portion 50 of the guide rail 5, and the tip end portion of each side edge 81 faces the side edge 50 of the guide rail 5 at a distance. In the illustrated embodiment, the front width of the side edge 81 of the bracket 8 is approximately the same as the front width of the guide rail 5, and in a plan view, the front end of the side edge 81 is in approximately the same position as the front end (opening groove 501) of the guide rail 5 and protrudes slightly (toward the opening) beyond the bottom plate 45. The lower end of the bracket 8 is in approximately the same position as the lower end of the guide rail 5; that is, it is located slightly above the upper surface of the bottom plate 45, or is close to the upper surface of the bottom plate 45 while being horizontally movable relative to it.

[0042] The gap blockage sheet 9 is integrally formed from a sheet body 90 and a fixing portion 91, and the sheet body 90 is integrally formed from a vertical portion 900 that is the same height as and integral with the fixing portion 91, and a lower portion 901 that extends downward below the lower end of the fixing portion 91. The height dimension of the fixing portion 91 of the gap blockage sheet 9 is approximately the same as the height dimension of the side edge 81 of the bracket 8, and the gap blockage sheet 9 is secured by screws 83 in a state where the fixing portion 91 is overlapped with the side edge 81 of the bracket 8 and sandwiched between the side edge 81 and a securing plate 82. If the gap blockage sheet 9 deteriorates over time, for example, the gap blockage sheet 9 can be easily replaced by removing the screws 83 and the securing plate 82.

[0043] The gap blockage sheet 9 has a predetermined flexibility and has a "rigidity" that allows the vertical portion 900 to stand on its own and maintain a vertical position, thereby preventing as much as possible sagging of the vertical portion 900. The gap blockage sheet 9 according to this embodiment is made of polyvinyl chloride, but the material is not limited thereto.

[0044] 11, 12, and 13, the sheet body 90 of the gap blockage sheet 9 is located outside the guide rail assembly 4. When the opening is fully closed, the vertical portion 900 of the sheet body 90 extends in the forward direction facing the lower end portion of the second portion 21' of the end sheet 2, and the lower portion 901 of the sheet body 90 curves at the lower end of the vertical portion 900 in a direction away from the second portion 21' of the end sheet 2 and is in close contact with the floor surface.

[0045] As described above, when the opening is fully closed, a gap may occur in the second part 21' of the end sheet 2 between the lower end 22 (height position L2) of the part adjacent to the first part 20' (the remaining part of the tip side part 20 of the end sheet 2) and the floor surface, but the sheet body 90 (vertical part 900 and lower part 901) of the pair of gap-blocking sheets 9 covers such part from inside and outside the room, thereby preventing air from flowing through the gap as much as possible.

[0046] As described above, when the opening is fully closed, the guide rail 5 is movable in the opening width direction and swingable in the front-to-back direction of the opening in response to the movement of the shutter curtain S, but the bracket 8 according to this embodiment is supported by the guide rail support part 40 so that it can swing in the front-to-back direction and move in the width direction, by connecting its bottom side to a connecting means, just like the guide rail 5. Therefore, when the opening is fully closed, the bracket 8 is movable together with the guide rail 5 in the opening width direction and swingable in the front-to-back direction of the opening in response to the movement of the shutter curtain S, and the gap blockage sheet 9 fixed to the side edge 81 of the bracket 8 is movable in response to the movement of the shutter curtain S, while maintaining a state in which its lower portion 901 is in contact with the floor surface. [Explanation of symbols]

[0047] S shutter curtain 1 Mainsheet 2 End Sheets 20 Tip side part 21 Proximal part 22 Bottom end 20´ 1st part 21´ 2nd part 2A Guide Elements 3 Intermediate end sheet 30 One half of the width direction 31 The other half in the width direction 32 Bottom end 5 guide rails 50 sides 8 Bracket 81 Side 9. Gap-blocking sheet 90 seat body 900 Vertical part 901 Lower part 91 Fixed part

Claims

1. A shutter curtain comprising a main sheet, left and right end sheets connected to both widthwise ends of the main sheet, and a plurality of guide elements provided at the ends of the end sheets in the height direction; Left and right guide rails are provided at both ends of the opening in the width direction, and receive the guide element and guide it in the height direction; Equipped with The end seat has a first portion positioned inside the guide rail together with the guide element when the opening is fully closed, and a second portion positioned outside the guide rail, A gap closing sheet is provided at the lower end portion of each of the left and right guide rails, and the lower end portion of the gap closing sheet is in contact with the floor surface outside the guide rail, and when the opening is in a fully closed state, the gap closing sheet faces the lower end portion of the second portion of the end sheet. Sheet shutter.

2. The gap blocking sheet has a vertical portion extending in the front direction opposite to the lower end portion of the second portion of the end sheet when the opening is fully closed, and a lower portion curved from the lower end of the vertical portion in a direction away from the second portion of the end sheet and in close contact with the floor surface. The sheet shutter according to claim 1.

3. a bottom plate is provided at the lower end of the guide rail, and an upper surface of the bottom plate is located higher than the floor surface; Lower ends of at least the first portion and the second portion of the end sheet adjacent to the first portion are located higher than lower ends of widthwise ends of the main sheet, When the opening is fully closed, the lower end of the main sheet is placed on the floor surface, and the first portion of the end sheet is placed on the bottom plate. The sheet shutter according to claim 1 or 2.

4. The end sheets include a first end sheet having the guide element, and a second end sheet connected to the first end sheet and the width direction end of the main sheet, The lower end of the second end sheet is at approximately the same height as the lower end of the width direction end of the main sheet, The lower end of the first end sheet is located higher than the width direction end of the main sheet and the lower end of the second end sheet, The first end sheet has a widthwise leading end portion provided with the guide element and a widthwise base end portion, a widthwise base end portion of the second end sheet is connected to an end portion of the main sheet in an overlapping state, and a widthwise tip end portion of the second end sheet is connected to the widthwise base end portion of the first end sheet in an overlapping state, a lower end of the widthwise leading end portion of the first end sheet is a lower end of a portion of the first portion and the second portion of the end sheet that is adjacent to at least the first portion; The sheet shutter according to claim 3.

5. The pair of gap blocking sheets are provided so as to sandwich the shutter core. The sheet shutter according to claim 1 or 2.

6. The guide rail has a pair of side edges, a support member is provided that is positioned outside one or both of the pair of side edges of the guide rail and extends in the forward direction, the gap blocking sheet includes a sheet body that forms the vertical portion and the lower portion, and a fixing portion, The fixing portion of the gap blocking sheet is detachably provided on the support member. The sheet shutter according to claim 2.

7. A bracket having a U-shaped cross section and a pair of side edges and a bottom edge is provided at the lower end of the guide rail, with each side edge positioned outside the corresponding side edge of the guide rail and the bottom edge positioned outside the bottom of the guide rail, The support member is formed from the side edge of the bracket. The sheet shutter according to claim 6.

8. When the opening is fully closed, the guide rail is movable in the opening width direction and swingable in the front-rear direction of the opening in accordance with the movement of the shutter curtain, When the opening is fully closed, the bracket is movable in the opening width direction together with the guide rail and swingable in the front-to-rear direction of the opening in response to the movement of the shutter curtain, and the gap closing sheet is movable in response to the movement of the shutter curtain. The sheet shutter according to claim 7.

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