Shutter structure

Abstract

To propose a shutter structure that can prevent a sash from being damaged in a case where an object is thrown to a shutter curtain.SOLUTION: A shutter structure 1A includes a sash 2 installed in an opening 101 of a building, a shutter curtain 7 that can be raised / lowered and is installed on the outdoor side of the sash 2, and a buffer member 15 that covers outdoor and / or indoor surfaces of the shutter curtain 7 when the shutter curtain 7 is lowered, thereby suppressing bending of the shutter curtain 7 toward the sash 2.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a shutter structure including a sash and a shutter curtain. [Background technology]

[0002] A shutter structure including a sash installed in an opening such as a window in a building such as a house, and a shutter curtain that can be raised and lowered and installed on the outdoor side of the sash has been known for some time. For example, Patent Document 1 shows a shutter structure that includes a sash and a shutter curtain, and further includes a roller blind on the outdoor side of the shutter curtain.

[0003] According to the shutter structure shown in Patent Document 1, when sunlight shines into the room through the sash during the day when the shutter curtain is open, the roller blind can be lowered to cover the sash, blocking the sunlight. Also, during heavy rain or at night, the shutter curtain can be lowered to cover the sash, providing rain protection, wind protection, crime prevention, sound insulation, and other benefits. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-323752 Summary of the Invention [Problem to be solved by the invention]

[0005] Meanwhile, in recent years, changes in the natural environment are predicted to lead to larger typhoons and an increase in their frequency, with strong winds with wind speeds of around 15 m / s and storms with wind speeds of 20 m / s or more expected to blow more frequently. When such strong winds or storms blow, objects placed around the building may be blown away and hit the shutter curtains, and depending on the size and weight of the flying object, the shutter curtains may bend significantly toward the interior and hit the sash, causing problems such as damage to the glass in the sash.

[0006] In view of the above, an object of the present invention is to propose a shutter structure that can effectively prevent damage to the sash even in a situation where an object is thrown toward the shutter curtain. [Means for solving the problem]

[0007] The shutter structure of the present invention comprises a sash installed at an opening in a building, a shutter curtain that can be raised and lowered and is installed on the outdoor side of the sash, and a buffer member that covers the outdoor and / or indoor surfaces of the shutter curtain when the shutter curtain is lowered, thereby preventing the shutter curtain from bending toward the sash. [Effects of the Invention]

[0008] According to the shutter structure of the present invention, the buffer member covers the outdoor and / or indoor surfaces of the shutter curtain, which prevents the shutter curtain from bending toward the sash. Therefore, even in a situation where an object is thrown toward the shutter curtain, damage to the sash by the shutter curtain can be effectively prevented. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a cross-sectional side view schematically showing a first embodiment of a shutter structure according to the present invention. [Figure 2] FIG. 2 is a front view schematically showing the shutter structure of FIG. 1. [Figure 3A]2 is an enlarged front view of an engaging portion and a holding portion of FIG. 1. FIG. [Figure 3B] FIG. 3B is a cross-sectional view taken along line AA shown in FIG. 3A. [Figure 4] FIG. 10 is a diagram showing a modified example of the first embodiment. [Figure 5] FIG. 10 is a cross-sectional side view schematically showing a second embodiment of a shutter structure according to the present invention. [Figure 6] FIG. 10 is a cross-sectional side view schematically showing a third embodiment of a shutter structure according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] An example of an embodiment of a shutter structure according to the present invention will be described below with reference to the accompanying drawings. Note that the drawings are schematic, and the thickness, width, and ratio of each part may differ from those actually implemented. Furthermore, ordinal numbers in this specification are used for convenience to distinguish between components, etc., and do not indicate order or priority.

[0011] (First embodiment) 1 and 2 are schematic diagrams illustrating a shutter structure 1A, a first embodiment of the shutter structure according to the present invention, attached to an opening 101 in a building skeleton 100. FIG. 1 is a cross-sectional side view, and FIG. 2 is a front view. The opening 101 shown in the figure is a waist-high window, but the opening 101 for which the shutter structure 1A is used is not limited to waist-high windows and can also be applied to, for example, a French window. FIG. 1 is a cross-sectional side view of the shutter structure 1A, with the indoor side being the right side in FIG. 1 and the outdoor side being the left side in FIG. 1. FIG. 2 is a front view of the shutter structure 1A as viewed from the outdoor side toward the indoor side (as viewed from the front). Note that the left and right sides of the shutter structure 1A in the following description refer to the left and right directions as viewed from the outdoor side toward the indoor side, as shown in FIG. 2. In addition, in FIG. 2, a portion of the left side of the buffer member 15 (details of which will be described later) is omitted in order to illustrate the shutter curtain 7 (details of which will be described later) positioned indoors relative to the buffer member 15.

[0012] The shutter structure 1A includes a sash 2 provided in an opening 101. The sash 2 includes a frame-like frame 3 attached to the opening 101. The frame 3 is configured to have a frame shape, and is composed of an upper frame 3a, a lower frame 3b, and left and right frames (not shown) that connect the upper and lower frames 3a and 3b on the left and right sides, as shown in FIG. 1 . The sash 2 also includes a glass shoji screen 4 disposed inside the frame 3 and movable left and right relative to the frame 3. The glass shoji screen 4 includes a rectangular glass window 5 and a frame-like frame 6 that surrounds the edge of the glass window 5. The frame 6 is configured to have a frame shape, and is composed of an upper frame 6a that can move left and right relative to the upper frame 3a, a lower frame 6b that can move left and right relative to the lower frame 3b, and left and right frames (not shown) that connect the upper and lower frames 6a and 6b on the left and right sides.

[0013] The shutter structure 1A further includes a shutter curtain 7 provided on the outdoor side of the sash 2. The shutter curtain 7 is made of, for example, steel or aluminum, and is formed by connecting multiple slats 7a extending long in the left-right direction in the vertical direction as shown in Fig. 2, and is shaped like a bendable rectangular plate where the slats 7a are connected. A baseboard 7b made of, for example, an extruded aluminum material is provided at the lowest row of the slats 7a.

[0014] The shutter structure 1A also includes a shaft-shaped first reel-up part 8 whose center line extends in the left-right direction and which is rotatable around this center line, and the upper end (commonly referred to as the hanging point) of the shutter curtain 7 is attached to the first reel-up part 8. The shutter structure 1A of this embodiment includes a drive unit 9 formed, for example, by a motor that rotates when power is supplied, and a power transmission unit 10 formed, for example, by a toothed belt, which transmits the rotational force of the drive unit 9 to the first reel-up part 8, and is capable of rotating the first reel-up part 8 in the direction to reel-up the shutter curtain 7 and in the direction to unreel-up the shutter curtain 7. When the drive unit 9 is driven to rotate the first reel-up part 8 in the direction to reel-up the shutter curtain 7, the shutter curtain 7 rises and the sash 2 is opened to the outdoors, and when the first reel-up part 8 is rotated in the direction to unreel-up the shutter curtain 7, the shutter curtain 7 descends and the sash 2 is closed by the shutter curtain 7. The driving source for rotating the first winding section 8 is not limited to an electric type, and for example, a manual driving source equipped with a spring that stores the force to rotate the first winding section 8 in the direction of winding the shutter curtain 7 may be used.

[0015] Furthermore, the shutter structure 1A is equipped with a first storage section 11. As shown in Fig. 1, the first storage section 11 in this embodiment stores inside the shutter curtain 7 wound up by the first winding section 8, the drive section 9, and the power transmission section 10, thereby shielding the first winding section 8 and the like from wind, rain, and sunlight.

[0016] The shutter curtain 7 is provided with a door stop 12 that functions to prevent the baseboard 7b from being pulled into the first storage section 11 when the shutter curtain 7 is wound up by the first winding section 8. The door stop 12 is attached to the outdoor surface of the shutter curtain 7 above the baseboard 7b, and comes into contact with the second storage section 18, which will be described later, when the shutter curtain 7 is wound up by the first winding section 8, thereby preventing the baseboard 7b from being pulled into the first storage section 11. In this embodiment, a pair of door stops 12 are provided on the left and right sides of the shutter curtain 7, as shown in FIG. 2 .

[0017] 3A and 3B are detailed views of the door stop 12 of this embodiment, with Fig. 3A being a front view and Fig. 3B being a cross-sectional view taken along line AA in Fig. 3A. The door stop 12 includes a first vertical wall 12a extending in the vertical direction and contacting the outdoor surface of the shutter curtain 7 when attached to the shutter curtain 7, and a first horizontal wall 12b extending horizontally from the upper end of the first vertical wall 12a and contacting the second storage section 18 when the shutter curtain 7 is taken up by the first take-up section 8. The first vertical wall 12a is provided with a through-hole 12c through which a fastener (e.g., a screw, bolt, rivet, etc.) used to attach the door stop 12 to the shutter curtain 7 is inserted. The first horizontal wall 12b is provided with an attachment section 13. The mounting portion 13 of this embodiment is composed of a pair of pillar portions 13a extending upward from the first horizontal wall 12b, and a bridging portion 13b extending horizontally from the upper end of one pillar portion 13a to the upper end of the other pillar portion 13a, and is shaped so as to form a U-shape when viewed from the front.

[0018] 2, the shutter structure 1A is provided with a pair of first guide rails 14 that extend in the vertical direction and support the left and right ends of the shutter curtain 7. The first guide rails 14 have a portion located on the outdoor side of the shutter curtain 7 and a portion located on the indoor side, and these portions support the left and right ends of the shutter curtain 7 as it moves up and down.

[0019] The shutter structure 1A further includes a buffer member 15. The buffer member 15 in this embodiment is a thin, rectangular sheet. As shown in FIG. 2, the buffer member 15 has a lateral length greater than the inner dimensions of the paired first guide rail 14. The buffer member 15 is made of, for example, a synthetic resin sheet. While the buffer member 15 in this embodiment is made of polyester, the buffer member 15 may also be made of a synthetic resin material other than polyester. The material of the buffer member 15 is not limited to synthetic resin, and may be, for example, an elastically deformable metal such as a leaf spring. The buffer member 15 may also be a non-porous member with essentially no through-holes, or a perforated member with multiple through-holes, such as a net. The buffer member 15 may also be formed by combining multiple members, such as the slats 7a that make up the shutter curtain 7.

[0020] The shutter structure 1A also includes a shaft-shaped second winding section 16 whose center line extends in the left-right direction and is rotatable around this center line, and the upper end of the buffer member 15 is attached to the second winding section 16. In this embodiment, no drive section is provided to rotate the second winding section 16, but if necessary, an electric drive section using, for example, a motor that rotates when power is supplied, or a manual drive section that rotates the second winding section 16 in the direction of winding up the buffer member 15 using a spring that stores rotational force may be provided.

[0021] A holding portion 17 is provided at the lower end (tip) of the buffer member 15, and is detachably connected to the mounting portion 13. As shown in FIGS. 3A and 3B , the holding portion 17 of this embodiment includes a second vertical wall 17a extending downward from the buffer member 15 and having a notched lower portion from the indoor side toward the outdoor side, a second horizontal wall 17b extending horizontally from the lower end of the second vertical wall 17a toward the indoor side, and a folded wall 17c extending upward from the indoor side end of the second horizontal wall 17b, and is shaped like a hook overall. As shown in FIG. 3A , the left-right length of the holding portion 17 is smaller than the distance between a pair of pillars 13a of the mounting portion 13. The second horizontal wall 17b and the folded wall 17c are inserted between the pair of pillars 13a, and the second horizontal wall 17b engages with the bridge portion 13b, thereby holding the holding portion 17 to the mounting portion 13.

[0022] The shutter structure 1A further includes a second storage section 18. In this embodiment, the second storage section 18 is attached below the first storage section 11, as shown in FIG. 1 . The second storage section 18 stores the buffer member 15 wound up by the second winding section 16 inside, thereby shielding the second winding section 16 and the like from wind, rain, and sunlight. Although not shown, the buffer member 15 is also provided with something like a door stop 12, which prevents the lower end of the buffer member 15 from being pulled into the second storage section 18 when the buffer member 15 is wound up by the second winding section 16.

[0023] The shutter structure 1A configured in this way can open the sash 2 to the outdoors by using the drive unit 9 to rotate the first winding part 8 in the direction to wind up the shutter curtain 7, thereby raising the shutter curtain 7. When the first winding part 8 is rotated in the direction to wind up the shutter curtain 7, the first horizontal wall 12b of the door stop 12 comes into contact with the underside of the second storage part 18 before the shutter curtain 7 is completely wound up by the first winding part 8, thereby preventing the baseboard 7b from being pulled into the first storage part 11.

[0024] When the first winding part 8 is rotated in the direction of unwinding the shutter curtain 7 by the drive part 9, the shutter curtain 7 descends and the sash 2 can be closed with the shutter curtain 7, thereby providing effects such as protection from rain, wind, crime and sound.

[0025] Furthermore, when strong winds or storms are predicted, the shutter curtain 7 is lowered with the holding portion 17 attached to the mounting portion 13. At this time, the mounting portion 13 pulls down the holding portion 17, causing the buffer member 15 to also lower, so that the outdoor surface of the lowered shutter curtain 7 can be covered with the buffer member 15. In this state, even if an object blown by the wind collides with the shutter curtain 7 via the buffer member 15, the impact of the collision is suppressed by the buffer member 15, so the deflection of the shutter curtain 7 is suppressed compared to when the buffer member 15 is not used. In other words, according to the shutter structure 1A, damage to the sash 2 by the shutter curtain 7 can be more effectively prevented than in conventional shutter structures.

[0026] Here, the holding portion 17 in this embodiment is provided at the lower end of the buffer member 15, and the mounting portion 13 is provided on the door stop 12 provided above the baseboard 7b. In other words, the buffer member 15 covers almost the entire area in the vertical direction of the portion of the lowered shutter curtain 7 where the slats 7a are located. Furthermore, the length of the buffer member 15 in the horizontal direction is shaped to be larger than the inner dimension of the paired first guide rail 14, so that the buffer member 15 covers the entire area in the horizontal direction of the lowered shutter curtain 7. In this way, the buffer member 15 in this embodiment covers almost the entire area of ​​the shutter curtain 7 in both the vertical and horizontal directions, and flying objects will almost certainly collide with the buffer member 15 before the shutter curtain 7, thereby more effectively preventing damage to the sash 2 by the shutter curtain 7.

[0027] 3B, the holding portion 17 of this embodiment is provided with a folded wall 17c. This effectively prevents the holding portion 17 from coming off the mounting portion 13 due to the folded wall 17c engaging with the bridging portion 13b, even when the buffer member 15 or the shutter curtain 7 is bent toward the indoors or outdoors due to wind or flying objects, causing the buffer member 15 to move toward the outdoors relative to the shutter curtain 7.

[0028] When the wind dies down and there is no longer any need to use the buffer member 15, the drive unit 9 is driven to rotate the first winding unit 8 in the direction to wind up the shutter curtain 7. This causes the shutter curtain 7 to rise and be stored in the first storage unit 11. Furthermore, as the shutter curtain 7 rises, the buffer member 15 can also be raised via the attachment unit 13 and the holding unit 17, so that the buffer member 15 can also be stored in the second storage unit 18.

[0029] In the above-described embodiment, the left and right ends of the buffer member 15 are not supported. However, the left and right ends of the buffer member 15 may be supported, for example, as in the modified example of the first embodiment shown in FIG. 4 . FIG. 4 is a cross-sectional view of the buffer member 15 as viewed perpendicular to the vertical direction. In this modified example, the buffer member 15 includes support portions 19 that are T-shaped in cross section at the left and right ends. This modified example also includes a pair of second guide rails 20 that are C-shaped in cross section, extend vertically, and receive the support portions 19 inside. According to the modified shutter structure 1A including such support portions 19 and second guide rails 20, the left and right ends of the buffer member 15 are supported on the outdoor and indoor sides, and the support portions 19 are held in place by the second guide rails 20. In other words, even if a relatively large and heavy flying object strikes the buffer member 15, the buffer member 15 does not bend significantly. This also limits the deflection of the shutter curtain 7, thereby more effectively preventing damage to the sash 2 by the shutter curtain 7.

[0030] Second Embodiment 5 is a cross-sectional side view of a shutter structure 1B according to a second embodiment of the shutter device of the present invention. In the following description, parts common to the first embodiment are designated by the same reference numerals in the drawings, and detailed description thereof will be omitted.

[0031] In the shutter structure 1B, the door stop 12 is attached to the indoor surface of the baseboard 7b, and the buffer member 15, the second winding portion 16, the holding portion 17, and the second storage portion 18 are provided on the indoor side of the shutter curtain 7 and on the outdoor side of the sash 2.

[0032] In the shutter structure 1B, the sash 2 can be opened to the outdoors by rotating the first winding part 8 in the direction of winding up the shutter curtain 7 using the drive part 9, thereby raising the shutter curtain 7, and the sash 2 can be closed with the shutter curtain 7 by rotating the first winding part 8 in the direction of unwinding the shutter curtain 7 using the drive part 9, thereby lowering the shutter curtain 7.

[0033] Furthermore, when the shutter curtain 7 is lowered with the holding portion 17 attached to the mounting portion 13, the mounting portion 13 pulls down the holding portion 17, causing the buffer member 15 to also lower, so that the indoor surface of the lowered shutter curtain 7 is covered by the buffer member 15. In this state, even if an object blown by the wind hits the shutter curtain 7 and causes the shutter curtain 7 to bend toward the indoor side, the buffer member 15, which is located on the indoor side of the shutter curtain 7, prevents the shutter curtain 7 from bending. Therefore, according to the shutter structure 1B, damage to the sash 2 by the shutter curtain 7 can be more effectively prevented than with conventional shutter structures.

[0034] In the shutter structure 1B, the holding portion 17 is located on the indoor side of the shutter curtain 7, so after the shutter curtain 7 is lowered, the buffer member 15 wound up in the second winding portion 16 can be pulled out from the second storage portion 18 and the holding portion 17 can be attached to the attachment portion 13 from the indoor side.

[0035] When it is no longer necessary to use the buffer member 15, the drive unit 9 is driven to rotate the first winding unit 8 in the direction to wind up the shutter curtain 7, which causes the shutter curtain 7 to rise and be stored in the first storage unit 11, and as the shutter curtain 7 rises, the buffer member 15 also rises via the mounting unit 13 and the holding unit 17, allowing the buffer member 15 to be stored in the second storage unit 18. It is also possible to remove the holding unit 17 from the mounting unit 13 and store the buffer member 15 in the second storage unit 18, and then drive the drive unit 9 to rotate the first winding unit 8 in the direction to wind up the shutter curtain 7, thereby storing the shutter curtain 7 in the first storage unit 11.

[0036] (Third embodiment) FIG. 6 is a cross-sectional side view that schematically shows a shutter structure 1C that is a third embodiment of a shutter device according to the present invention.

[0037] The shutter structure 1C is equipped with a bracket 21 attached to the upper frame 3a of the sash 2. The bracket 21 protrudes from the upper frame 3a toward the outdoors, and the above-mentioned attachment portion 13 is provided on the underside of the bracket 21. The second winding portion 16 that winds up the buffer member 15 and the second storage portion 18 are provided on the outdoors side of the shutter curtain 7. The holding portion 17 provided at the tip of the buffer member 15 can be attached to the attachment portion 13 so that the buffer member 15 passes below the baseboard 7b of the raised shutter curtain 7. Although not shown in the figures, the shutter curtain 7 of the shutter structure 1C is also provided with something similar to the above-mentioned door stop 12 to prevent the baseboard 7b of the shutter curtain 7 from being pulled into the first storage portion 11.

[0038] In the shutter structure 1C, the sash 2 can be opened to the outdoors by rotating the first winding part 8 in the direction of winding up the shutter curtain 7 using the drive part 9, thereby raising the shutter curtain 7, and the sash 2 can be closed by the shutter curtain 7 by rotating the first winding part 8 in the direction of unwinding the shutter curtain 7 using the drive part 9, thereby lowering the shutter curtain 7.

[0039] Furthermore, when the shutter curtain 7 is lowered with the holding portion 17 attached to the mounting portion 13, the baseboard 7b presses down on the buffer member 15, causing the buffer member 15 to be pulled out of the second storage portion 18, and the outdoor side and indoor side of the shutter curtain 7 can be covered by the buffer member 15, as shown by the imaginary line in Figure 6. In this state, even if an object blown by the wind strikes the shutter curtain 7 via the buffer member 15, the impact is absorbed by the buffer member 15, and deflection of the shutter curtain 7 can be suppressed. Furthermore, even if the shutter curtain 7 deflects toward the indoor side, the deflection of the shutter curtain 7 is suppressed by the buffer member 15 located on the indoor side relative to the shutter curtain 7. Therefore, according to the shutter structure 1C, damage to the sash 2 by the shutter curtain 7 can be more effectively prevented than with conventional shutter structures.

[0040] An example of an embodiment of the present invention has been described above with reference to FIGS. 1 to 6, but the above-described embodiment may be modified as follows.

[0041] For example, in shutter structure 1A, door stop 12 may be provided on base board 7b by securing space on the outdoor side of base board 7b. Door stop 12 shown in shutter structure 1B may also be provided on slat 7a of shutter curtain 7 located above base board 7b. In shutter structures 1A and 1B, mounting portion 13 may be provided somewhere other than door stop 12 (for example, building frame 100 or sash 2).

[0042] The shutter structure 1B may be applied to the shutter structure 1A, and the buffer members 15 may be disposed on both the outdoor side and the indoor side of the shutter curtain 7.

[0043] In addition, in the shutter structure 1C, the mounting portion 13 provided on the bracket 21 only needs to be located on the indoor side of the shutter curtain 7, and therefore the bracket 21 may be attached to a location other than the upper frame 3a of the sash 2 (for example, the bracket 21 may be attached to the building frame 100). In the shutter structure 1C, the second winding portion 16 with the buffer member 15 wound up and the second storage portion 18 may be located on the indoor side of the shutter curtain 7, and the bracket 21 with the mounting portion 13 may be attached to the outdoor side of the shutter curtain 7 (for example, the underside of the first storage portion 11).

[0044] In addition, in the shutter structures 1A to 1C, as shown in Fig. 3B, the tip of the shutter curtain 7 is provided with a holding portion 17 shaped like a hook, and the attachment portion 13 is U-shaped when viewed from the front as shown in Fig. 3A, but the shapes of both can be changed as appropriate as long as the holding portion 17 can be detachably connected to the attachment portion 13. For example, the holding portion 17 may be U-shaped when viewed from the front, and the attachment portion 13 may be shaped like a hook.

[0045] In addition, in the shutter structures 1A to 1C, the buffer member 15 and the second winding section 16 are arranged inside the second storage section 18, but they may also be arranged inside the first storage section 11 together with the first winding section 8, etc. Also, the second winding section 16 may be eliminated, and the buffer member 15 may be configured to be folded in an accordion-like manner.

[0046] (Addendum) In one aspect, the present specification discloses the following technology.

[0047] (Technology 1) A sash (2) provided in an opening (101) of a building; a shutter curtain (7) that can be raised and lowered and is provided on the outdoor side of the sash (2); A shutter structure (1A) comprising a buffer member (15) that covers the outdoor and / or indoor surfaces of the shutter curtain (7) when the shutter curtain (7) is lowered, thereby suppressing bending of the shutter curtain (7) toward the sash (2).

[0048] With this technology, the buffer member prevents the shutter curtain from bending toward the sash, effectively preventing damage to the sash by the shutter curtain even in situations where an object is thrown toward the shutter curtain.

[0049] (Technology 2) The shutter structure (1A) according to Art 1, wherein the shutter curtain (7) has an attachment part (13) to which the tip of the buffer member (15) is detachably connected.

[0050] With this technology, for example, if the tip of the buffer member is connected to the attachment part when a strong wind or storm is expected, the buffer member can be raised and lowered along with the shutter curtain. Also, if the tip of the buffer member does not need to be used (for example, at night when the weather is good), the shutter curtain can be raised and lowered without raising and lowering the buffer member by detaching the tip of the buffer member from the attachment part.

[0051] (Technology 3) The shutter structure (1C) described in Art 1 is provided with an attachment part (13) to which the tip of the buffer member (15) covering the outdoor surface of the shutter curtain (7) is detachably connected and is provided on the indoor side of the shutter curtain (7), or to which the tip of the buffer member (15) covering the indoor surface of the shutter curtain (7) is detachably connected and is provided on the outdoor side of the shutter curtain (7).

[0052] With this technology, if the tip of the buffer member is connected to the attachment part, the buffer member can be raised and lowered together with the shutter curtain that is raised and lowered, and if the tip of the buffer member is detached from the attachment part, the shutter curtain can be raised and lowered alone without raising and lowering the buffer member. Also, with this technology, when the shutter curtain is lowered, both the outdoor and indoor surfaces of the shutter curtain can be covered with the buffer member.

[0053] (Technology 4) The shutter structure (1A) according to Art 1 includes a winding section that winds up the buffer member (15).

[0054] This technique allows the buffer member to be stored compactly when not in use.

[0055] Although one embodiment of the present invention has been described above, the present invention is not limited to this specific embodiment, and unless otherwise limited in the above description, various modifications and variations are possible within the spirit and scope of the present invention as defined in the claims. For example, the configurations of the above-described embodiment may be added or deleted as appropriate, and the configurations of one embodiment may be incorporated into other embodiments. Furthermore, the effects of the above-described embodiment are merely examples of the effects that can be obtained from the present invention. In other words, the effects of the present invention are not limited to the above-described effects, and additional effects may be obtained in addition to the above-described effects. [Explanation of symbols]

[0056] 1A, 1B, 1C: Shutter structure 2: Sash 7: Shutter curtain 13: Mounting part 15: Cushioning material 101: Opening

Claims

1. A sash installed at an opening in a building; A shutter curtain that can be raised and lowered and is provided on the outdoor side of the sash; A shutter structure comprising a cushioning member that covers the outdoor and / or indoor surfaces of the shutter curtain when the shutter curtain is lowered to suppress bending of the shutter curtain toward the sash.

2. The shutter structure according to claim 1 , wherein the shutter curtain has an attachment portion to which the tip of the buffer member is detachably connected.

3. A shutter structure as described in claim 1, comprising an attachment portion to which the tip of the buffer member covering the outdoor surface of the shutter curtain is detachably connected and is provided on the indoor side of the shutter curtain, or to which the tip of the buffer member covering the indoor surface of the shutter curtain is detachably connected and is provided on the outdoor side of the shutter curtain.

4. The shutter structure according to claim 1 , further comprising a winding section for winding up the buffer member.

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