Building shutter device

Abstract

To provide a bracket structure capable of attaching a fourth reinforcement 13 corresponding to bracket lower bent pieces 6c and 7c at attachment positions thereof according to the specifications in which a lintel space, where the seat plate 4a at the bottom of the shutter curtain is accommodated, is positioned on the upper side or on the lower side of bracket lower bent pieces 6c and 7c.SOLUTION: The bracket structure has lower bent pieces 6c, 7c formed with attachment holes 6f, 6g, 7f, 7g at attachment positions corresponding to the specification of a fourth reinforcement 13 to facilitate a fourth reinforcement 13 being easily attached according to the specifications.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a shutter for a building that is attached to an opening such as an entrance or exit of a building such as a building or a house. Device This relates to the technical field of [Background technology]

[0002] Generally, shutter devices for buildings are installed in openings such as entrances and exits of buildings such as buildings and houses. Such shutter devices are made up of various components and devices, such as guide rails installed on the left and right sides of the opening, a shutter curtain that is guided up and down on the guide rails to open and close the opening, a winding body (winding wheel, winding drum) that is arranged above the opening and on which the shutter curtain is wound, left and right brackets that are attached to the main body side members while supporting both the left and right ends of the winding body, and an electric opening and closing mechanism installed on either the left or right bracket in the case of a shutter device that rotates the winding body electrically. In such a shutter device, the bracket is configured to include a bracket main body portion that supports a support shaft provided at the end edge of the winding body, and a folded piece portion that is folded and formed from the lower end edge of the bracket main body portion, and a reinforcing material is supported between the left and right folded piece portions to reinforce the liner portion that encases the shutter curtain (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-43902 Summary of the Invention [Problem to be solved by the invention]

[0004] In shutter devices, a guide body (guide roller, smoother) may be provided to smoothly guide the shutter curtain unwound from the winding body into the guide piece portion formed in an expanded shape at the upper edge of the guide rail, and in this case, the guide body is often attached to the reinforcing material. On the other hand, in the case of shutter devices, there are some products in the same series that have multiple specifications, such as a ceiling-mounted type in which the shutter case is housed within the ceiling panel, and an exposed type in which there is no ceiling panel and the shutter case is exposed to the outside.In this case, the position of the gusset part that is provided to swallow the shutter curtain into the shutter case will differ depending on whether it is below or above the bent piece part of the bracket.If the gusset part is mounted in a different position above and below in this way, the position of the guide piece part of the guide rail will also differ above and below, and as a result, the guide body must also be positioned so that it is displaced above and below.This poses problems such as the need for dedicated guide bodies for each part, which increases the number of parts, and these are the issues that the present invention aims to solve. [Means for solving the problem]

[0005] The present invention was created in view of the above-mentioned circumstances and with the aim of solving these problems. The invention of claim 1 is a Opening Guide rails are provided on the left and right sides of the opening to guide the shutter curtain up and down to open and close the opening. above and in front of a winding body on which the shutter curtain is wound; and the winding body Left and right brackets attached to the frame side members in a state of supporting both left and right end edges of the The shutter curtain is mounted in the bracket and includes a guide piece portion formed on the upper end edge of the guide rail and expanding outward in the front-to-rear direction, a magus space formed below the guide piece portion to accommodate the seat plate of the lowest end of the shutter curtain that is fully opened and swallowed, and a guide roller disposed in front of the guide piece portion to guide the shutter curtain unwound from the winding body to the guide piece portion. The bracket is attached to the winding body. but support will be A bracket body portion and a bracket bent from the lower end edge portion of the bracket body portion. will be A lower folded piece portion is provided, The magus space has two specifications: an upper specification that is an upper magus space above the lower folded piece, and a lower specification that is a lower magus space below the lower folded piece. In a shutter device for a building, The lower side surface of a reinforcing member having a rectangular tube shape, which is supported by the left and right bracket main body portions via connecting metal fittings, is attached to the lower bent piece portion, and the guide roller is attached to the reinforcing member. The attachment position of the reinforcing member is configured so that the upper specification is attached to a rear attachment position closer to the guide rail than the lower specification. The guide roller is attached to the upper side surface of the reinforcing member in the upper specification, and to the rear side surface of the reinforcing member in the lower specification, so that the attachment height of the upper specification relative to the reinforcing member is higher than that of the lower specification. The reinforcing member is attached so that its position in the front-to-rear direction can be adjusted freely relative to the lower bent piece portion and the guide rail main body portion, so that the upper specification is attached to a rear attachment position closer to the guide rail than the lower specification, and the arrangement position of the guide roller relative to the guide piece portion in the front-to-rear direction is the same in either specification. This is a shutter device for a building characterized by the above. The invention of claim 2 is a shutter device for buildings according to claim 1, characterized in that the lower folded piece has multiple sets of mounting holes drilled therein corresponding to the mounting positions of the reinforcing material. The invention of claim 3 is as follows: Connecting fittings is characterized in that it is configured with a connecting base having an upper piece and a front piece that abut the upper side surface portion and the front side surface portion, and a connecting piece that extends upward from the upper piece and is connected to the bracket main body, and the front piece is fastened to the front side surface portion via a fastening material that is inserted in the front-rear direction. 1 or 2 1 is a shutter device for a building as described above. The invention of claim 4 is characterized in that the connection of the connecting piece to the bracket body is fastened using a square root bolt with a square pillar-shaped bolt head portion of the threaded portion, and the square root bolt is inserted into a square mounting hole provided in the bracket body in a rotation-preventing manner. 3 1 is a shutter device for a building as described above. [Effects of the Invention]

[0006] By adopting the invention of claim 1, when attaching a reinforcing material to the lower bent piece provided at the lower end edge of the left and right brackets on which the winding body is supported, the reinforcing material can be attached so that its position in the forward and backward directions can be freely adjusted, thereby making it possible to attach the reinforcing material in any way that suits the specifications. Furthermore, since the seat plate position when the shutter curtain is fully open differs between the upper specification that fits into the magus space above the lower bent piece and the lower specification that fits into the magus space below, even if the mounting position of the reinforcing material relative to the lower bent piece differs, corresponding mounting holes are formed, so that the reinforcing material can be reliably mounted according to the specifications. By adopting the invention of claim 2, the reinforcing material can be attached with high precision and ease, with its position freely adjustable in the front-to-rear direction, thanks to the presence of multiple sets of attachment holes corresponding to the specifications. Claim 3 By adopting this invention, when the reinforcing material is further connected to the bracket main body portion via a connecting fitting, the connecting fitting is connected to the reinforcing material via a fastening material inserted in the front-to-rear direction, and as a result, the reinforcing material is firmly attached in combination with being connected to the lower bent piece portion. Claim 4With this invention, when connecting the reinforcing material to the bracket main body, a square root bolt that is prevented from rotating is used as the fastening material, so that secure fastening can be achieved even in places where the bracket main body is close to a body side member such as a wall and cannot be supported to prevent rotation using a tool such as a wrench. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. [Figure 2] This is a side view of the drive side bracket portion fastened to a wooden support with a through bolt in a ceiling installation specification. [Figure 3] This is a side view of the drive side bracket portion fastened to a wooden support with a through bolt in an exposed installation specification. [Figure 4] This is a side view of the drive side bracket portion fastened with screws to a wooden support in a ceiling installation specification. [Figure 5] This is a side view of the drive side bracket portion fastened to a wooden support with screws in an exposed installation specification. [Figure 6] This is a side view of the drive side bracket portion fastened with screws to a steel support pillar in a ceiling installation specification. [Figure 7] This is a side view of the drive side bracket portion fastened to the steel support with screws in an exposed installation specification. [Figure 8] (A), (B), and (C) are a side view, a partially cutaway front view, and a bottom view of the drive-side bracket. [Figure 9] (A), (B), and (C) are a side view, a partially cutaway rear view, and a bottom view of the driven-side bracket. [Figure 10] This is an enlarged side view of the magusa portion in the ceiling installation specification. [Figure 11] This is an enlarged side view of the magusa portion in the exposed installation specification. [Figure 12] This is a front view of the exposed magusa part. [Figure 13] (A)(B)(C) are a side view, a front view, and a plan view of the connecting fitting. [Figure 14] 10A and 10B are plan views of the main part showing the installation state of the shallow groove guide rail and the deep groove guide rail when the bracket is fastened to the wooden support using a through bolt. [Figure 15] 10A and 10B are plan views of the main part showing the installation state of the shallow groove guide rail and the deep groove guide rail when the bracket is fastened to the wooden post using screws. [Figure 16] 10A and 10B are plan views of the main part showing the installation state of the shallow groove guide rail and the deep groove guide rail when the bracket is fastened to the steel support pole using screws. [Figure 17] 10A and 10B are plan and front views of the main parts showing the installation state of the shallow groove guide rail and deep groove guide rail when the bracket is fastened to a wooden post using a through bolt, and the fastening position of the bracket. [Figure 18] 10A and 10B are plan and front views of the main parts showing the installation state of the shallow groove guide rail and the deep groove guide rail when the bracket is fastened to a wooden post using screws, and the fastening position of the bracket. [Figure 19] 10A and 10B are plan and front views of the main parts showing the installation state of the shallow groove guide rail and deep groove guide rail when the bracket is fastened to the steel support using screws, and the fastening position of the bracket. [Figure 20] 10A, 10B, and 10C are a side view, a front cross-sectional view, and a bottom view of a driving-side bracket according to a second embodiment. [Figure 21] 10A and 10B are plan and front views of the main parts showing the installation state of the shallow groove guide rail and the deep groove guide rail when the bracket is fastened to a wooden post using screws, and the fastening position of the bracket. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a shutter device for a building, which is configured using various components such as two sets (two types) of guide rails 2 and 3 (described later) provided on the left and right sides of an opening E such as an entrance or exit of a building, a shutter curtain 4 guided up and down by the guide rails 2 and 3 to open and close the opening E, a take-up body (take-up wheel, take-up drum) 5 disposed above the opening E and around which the shutter curtain 4 is wound, drive-side and driven-side brackets 6 and 7 supporting both left and right end edges of the take-up body 5, and an electric opening / closing device 8 attached to the drive-side bracket 6 for rotating the take-up body 5, and the like, all of which are conventional.

[0009] The two types of guide rails 2, 3 both have a guide groove X formed in a concave groove shape, as shown in Figure 14, but one of the guide rails 2 has a small (narrow) rail width in the left-right direction from the opening piece 2a on the inside left-right direction that forms the groove opening of the guide groove X to the groove bottom piece (rail outer end piece) 2b on the outside left-right direction, and the groove depth of the guide groove X is shallow, while the other guide rail 3 has a large (wide) rail width in the left-right direction from the opening piece 3a to the groove bottom piece 3b, and the groove depth of the guide groove X is deeper than that of the guide rail 2, and these are used depending on the left-right width of the shutter curtain 4, and in this embodiment, two sets of guide rails 2, 3 with different left-right widths are set, but it goes without saying that three or more sets may be set if necessary.

[0010] Incidentally, the larger the shutter curtain 4's left-to-right width, the greater the amount of bending when hit by strong winds, and the greater the amount of movement of the left and right edges, making it more likely to come off the guide rails 2, 3. Therefore, in order to prevent the shutter curtain 4 from coming off the guide rails 2, 3, guide rails 2 with shallow groove depths are used for shutter curtains 4 with small left-to-right widths, and guide rails 3 with deep groove depths are used for shutter curtains with large left-to-right widths. By using the guide rails 2, 3 in this manner, the insertion allowance (amount of insertion, depth of insertion) of the left and right edges of the shutter curtain 4 into the guide groove X is shallow for shutter curtains with small left-to-right widths and deep for shutter curtains with large left-to-right widths, thereby taking into consideration the shutter curtain 4's coming off the guide rails 2, 3 when it bends in strong winds. In the following explanation, these guide rails 2, 3 will be referred to as the "shallow groove guide rail 2" and the "deep groove guide rail 3."

[0011] Both brackets 6, 7 are formed with a square plate-shaped bracket main body 6a, 7a and upper, lower, front and rear bent piece portions 6b-6e, 7b-7e that are bent inward in the left-right direction from the four peripheral edges of the bracket main body, and the rear (opening side) bent piece portions 6e, 7e, which are on the rear side in the front-to-rear direction (opening E side), are used to attach the brackets 6, 7 to a vertical support 9, which is an example of a body side member.

[0012] In addition, the brackets 6 and 7 have first to fourth reinforcing members (reinforcing frames) 10, 11, 12, and 13 bridging between the upper and lower end edges of the front bent pieces 6d and 7d, between the upper portions of the rear bent pieces 6e and 7e, and between the rear portions of the lower bent pieces 6c and 7c, and each of these reinforcing members 10, 11, 12, and 13 is attached to the corresponding bent pieces 6b to 6e and 7b to 7e via screws 14a. Furthermore, in this embodiment, upper and front case plates 14b and lower case plate 14c are assembled to first to fourth reinforcing members 10, 11, 12, and 13, thereby forming shutter case 14. In this case, these case plates 14b and 14c are fastened to first, second, and fourth reinforcing members 10, 11, and 13 with screws 14d, but third reinforcing member 12 is also fixed to horizontal support 9a, which is a body-side member, and third reinforcing member 12 and the upper case plate 14b are fastened to horizontal support 9a with screws (coarse thread) 14e when horizontal support 9a is made of wood as shown in Figures 2 to 5, but with screws 14d when horizontal support 9a is made of steel as shown in Figures 6 and 7.

[0013] The details of the configuration for attaching the rear bent piece portion (corresponding to the "opening side bent piece portion" of the present invention) 6e to the vertical support 9 and the configuration for attaching the fourth reinforcing member 13 to the lower bent piece portion 6c will be described later. Incidentally, the opening / closing machine 8 is mounted on the drive side bracket 6, and furthermore, a driven sprocket 15 is arranged on the drive side bracket 6 side, which is interlocked with the drive sprocket 8a mounted on the opening / closing machine 8 via an endless transmission chain 8b. The driven sprocket 15 and the winding body 5 are connected in a state in which they rotate together, and this connected assembly is rotatably supported on a support shaft portion 5a which is integrally formed on the bracket main body 6a. As a result, the winding body 5 is rotatably supported on the bracket 6 so as to rotate forward and reverse based on the drive of the opening / closing machine 8. In this case, if the driving side bracket 6 has a large amount of winding, for example, for the shutter curtain 4 (the shutter curtain 4 has a long vertical length or a large horizontal width), the load on the opening / closing mechanism 8 will be large, and in order to reduce this load, the driven sprocket 15a may be made larger in diameter.This is shown as a second embodiment in Figure 20 and will be described later.

[0014] The left and right brackets 6, 7 configured in this manner have guide pieces 2c, 3c formed on the upper edges of the guide rails 2, 3 so as to widen upwards, fitted into the lower portions of the rear bent pieces 6e, 7e, and the undersides of the guide pieces 2c, 3c have ridge portions 17, 18 of the following two specifications formed to accommodate the seat plate 4a provided at the bottom end of the shutter curtain 4 when it is fully open. In this case, one of the tatami mat parts 17 has a ceiling board 19 provided below the lower case board 14c, and is of an in-ceiling installation type (lower side specification) formed between the ceiling board 19 and the shutter case 14, while the other tatami mat part 18 has no ceiling board 19, the shutter case 14 is exposed and can be seen directly from the outside, and is of an exposed installation type (upper side specification) formed above the lower case board 14c; hereinafter, the tatami mat parts 17, 18 of these specifications will be distinguished by being referred to as the "in-ceiling tatami mat part 17" and the "exposed tatami mat part 18".

[0015] As shown in Figures 2, 4 and 6, the ceiling-mounted installation specification equipped with the ceiling-mounted slack portion 17 is formed below the lower bent piece 6c, that is, between the lower case plate 14c of the shutter case 14 and the ceiling plate 19 below the lower case plate 14c, and when the shutter curtain 4 is in the fully open position, the seat plate 4a is swallowed (housed, fits in) into the lower slack space Sd formed by the ceiling-mounted slack portion 17 arranged below the lower bent piece 6c, and in this swallowed state the lower edge of the seat plate 4a is configured to be approximately flush with the ceiling plate 19. In contrast, in the case of an exposed installation specification with an exposed gusset 18, as shown in Figures 3, 5 and 7, there is no ceiling panel 19 and the shutter case 14 is exposed to the outside, and the exposed gusset part 18 is formed inside the shutter case 14 above the lower folded piece part 6c.As a result, when the shutter curtain 4 is in the fully open position, the seat plate 4a is swallowed (housed, fits in) into the upper gusset space Su arranged above the lower folded piece part 6c, and in this swallowed state the lower edge of the seat plate 4a is configured to be approximately flush with the lower case plate 14c.

[0016] When the specifications are set differently in this way between the exposed installation specification with the exposed magus part 18 and the in-ceiling installation specification with the in-ceiling magus part 17, the area where the seat plate 4a fits (is swallowed) when the shutter curtain 4 is in the fully open position will differ between the upper magus space Su and the lower magus space Sd, based on the lower case plate 14c. Due to this difference, the guide piece parts 2c and 3c formed in an expanded shape on the upper edge of the guide rail 2 will also be positioned differently in the upper and lower positions relative to the lower case plate 14c (lower bent piece part 6c).

[0017] On the other hand, in order to guide the shutter curtain 4 that is unwound from the winding body 5 onto the guide rails 2 and 3 to the guide piece portions 2c and 3c, guide rollers (guide bodies, smoothers) 20 are arranged above both of the slit portions 17 and 18, but the arrangement of these guide rollers 20 also needs to be different depending on the upper and lower arrangement positions of the guide piece portions 2c and 3c that arise due to the differences in specifications. Incidentally, in this embodiment, the guide pieces 2c and 3c are formed so as to expand outward in the front-to-back and left-to-right directions as they move upward, and the guide roller 20 is positioned further inward in the left-to-right direction than the guide pieces 2c and 3c, and is positioned so as to overlap (be at approximately the same height as) the guide pieces 2c and 3c at the portion on the winding body 5 side when viewed from the side.

[0018] In this embodiment, the guide roller 20 is attached to the fourth reinforcement member 13 via the bracket 20a, but when the specification is to be installed inside the ceiling, as mentioned above, the seat plate 4a will be swallowed up into the lower magus space Sd below (below the shutter case 14) the lower bent piece portion 6c (lower case plate 14c), and therefore the guide pieces 2c and 3c will also be arranged in a lower position close to the lower bent piece portion 6c accordingly. On the other hand, in the case of the exposed fitting specification, the guide roller 20 is swallowed up in the upper magus space Su formed by the seat plate 4a above the lower folded piece 6c (inside the shutter case 14), and therefore the guide pieces 2c and 3c are arranged in a corresponding upper position spaced apart from the lower folded piece 6c. As a result, the guide roller 20 also needs to be arranged at different positions above and below in accordance with the guide pieces 2c, 3c which are arranged at different positions above and below. Incidentally, the fourth reinforcing member 13 of this embodiment has a rectangular tubular shape with upper and lower side surface portions 13a, 13b and front and rear side surface portions 13c, 13d.

[0019] Therefore, in this embodiment, when the guide roller 20 is installed in a ceiling-mounted installation, the bracket 20a is attached to the rear side surface portion 13d of the fourth reinforcement 13 facing the guide rails 2 and 3, so that the guide roller 20 is arranged to face the guide piece portions 2c and 3c in a lower portion between the guide rail and the fourth reinforcement 13, and when the guide roller 20 is installed in an exposed installation, the bracket 20a is attached to the upper side surface portion 13a of the fourth reinforcement 13, so that the guide roller 20 is arranged to face the guide piece portions 2c and 3c in an upper portion on the upper side of the fourth reinforcement 13. In order to accommodate both the in-ceiling installation specification and the exposed installation specification, the attachment position of the guide roller 20 relative to the fourth reinforcement member 13 is different, but the front-to-back arrangement position of the guide roller 20 relative to the guide piece portions 2c, 3c must be the same.As a result, the arrangement position of the fourth reinforcement member 13 relative to the guide rails 2, 3 must be different in distance.For this reason, the lower side surface portion 13b of the fourth reinforcement member 13 is set up so that the front-to-back position can be freely adjusted relative to the lower folded piece portions 6c, 7c to accommodate the two types of specifications. Specifically, the lower bent pieces 6c and 7c are pre-drilled at the factory with mounting holes (pre-holes) 6f, 6g, 7f and 7g for screws 14a, which are fasteners for attaching the lower side surface portion 13b of the fourth reinforcing member 13, and the mounting holes 6f, 6g, 7f and 7g are arranged in two sets of mounting hole groups to accommodate the two specifications mentioned above. Incidentally, when the mounting holes 6f, 6g, 7f, and 7g are provided in pairs, if they are all in different positions, four holes are required, but if one hole is common to all of them, it is possible to make the number three and make the central hole common.

[0020] Furthermore, since the fourth reinforcing member 13 is provided on each of the magasa portions 17 and 18 and bears the load of the shutter curtain 4, it is required to have a reinforced structure.For this reason, in this embodiment, the fourth reinforcing member 13 is connected to the bracket main body portion 6a via a connecting fitting 21. The connecting fitting 21 used in this case is composed of an inverted L-shaped base 21a consisting of an upper piece 21b and a front piece 21c that abut against the upper side surface 13a and front side surface 13c of the fourth reinforcement 13, and a connecting piece 21d that is long in the front-to-rear direction and extends upward from the upper piece 21b of the base 21a, and the connecting fitting 21 is fixed to the front side surface 13c of the fourth reinforcement by inserting (threading) a fastening device, a screw 21e, in the front-to-rear direction into the front piece 21c.

[0021] Furthermore, a mounting hole 21f is formed in the connecting piece portion 21d of the connecting fitting 21, and a bolt 21g is inserted into the mounting hole 21f to fasten the connecting piece portion 21d to the bracket main bodies 6a, 7a. In this case, as described above, the mounting position of the fourth reinforcing member 13 relative to the bracket 6 differs in the front-to-rear direction for the in-ceiling installation and the exposed installation, and therefore the mounting hole 21f formed in the connecting piece portion 21d is an elongated hole that is long in the front-to-rear direction, and the insertion position of the bolt 21g relative to the mounting hole 21f can be moved in the front-to-rear direction to accommodate the fact that the mounting position of the fourth reinforcing member 13 relative to the bracket main bodies 6a, 7a differs in the front-to-rear direction.

[0022] In this way, the connecting piece portion 21d of the connecting fitting 21 is fixed to the bracket main body 6a via the bolt 21g. However, there may be a small gap between the bracket main body 6a and the opposing body side member, making it difficult to insert a tool such as a wrench. Taking this into consideration, the present embodiment employs a square root bolt 21g in which the head portion of the threaded portion is shaped like a square pillar. The bracket main body 6a is formed with a square bolt hole (not shown) that corresponds to the square pillar portion of the square root bolt 21g. The square root bolt 21g is inserted into the bolt hole of the bracket main body 6a from the outside in the left-right direction and assembled in a non-rotating state. In this state, by screwing a nut 21h into the threaded portion of the square root bolt 21g that protrudes inward in the left-right direction of the bracket main body 6a, the square root bolt 21g can be fastened in a non-rotating state. Incidentally, if the connecting fitting 21 of this embodiment is only to be adapted to the two specifications mentioned above, it is sufficient for it to have a length corresponding to the position of the square root bolt 21g that relatively displaces the connecting piece portion 21d, but the connecting fitting 21 of this embodiment is adapted to cases where the specifications are even different from those mentioned above, for example, when the slats that make up the shutter curtain are cylindrical (hollow) or when the slats are pipe shutters. If necessary, the upper piece portion 21b of the connecting fitting 21 and the upper side surface portion 13a of the fourth reinforcing member 13 may be fastened together with a fastener such as a screw.

[0023] Next, the difference between the shallow and deep groove guide rails 2 and 3 will be explained. The shallow groove guide rail 2 is used when the shutter curtain 4 has a narrow width and is subject to little deflection in strong winds, and is set to a width of 60 mm, for example. The deep groove guide rail 3 is used when the shutter curtain 4 has a wide width and is subject to a large deflection in strong winds, and is set to a width of 90 mm, for example. In this embodiment, two types of guide rails 2 and 3 are prepared to correspond to the width of the shutter curtain 4. When these guide rails 2 and 3 are attached to the frame, the protruding width (projection width) Y of the opening pieces 2a and 3a of the guide rails 2 and 3 from the vertical support 9 is made the same (uniform). As a result, the positions of the groove bottom pieces 2b and 3b of the guide rails 2 and 3 are positioned at positions offset left and right with respect to the vertical support 9, and the attachment positions of the brackets 6 and 7 to the vertical support 9 are also offset left and right accordingly.

[0024] Therefore, the brackets 6, 7 are connected to the vertical support 9 via fasteners, and mounting holes for the fasteners are drilled in the rear bent pieces 6e, 7e in advance at the factory. In this case, if the vertical support 9 is made of steel, the vertical support 9 is strong enough that there is no problem of the vertical support 9 cracking even if the fastening location is at the end portion of the vertical support 9. Therefore, when the vertical support 9 is made of steel, thin-diameter screws 22 are used as fasteners, and two rows of thin-diameter mounting holes 6h, 7h are drilled in the rear bent pieces 6e, 7e, in front and rear, regardless of whether the mounting positions of the two types of guide rails 2, 3 relative to the vertical support 9 change.

[0025] On the other hand, if the vertical support 9 is made of wood, there is a risk that the vertical support 9 will crack at the end of the vertical support 9 if the fastening point is located at that point.For this reason, the fastening position of the vertical support 9 must be located as close to the center in the left-right direction as possible. Therefore, when the vertical support 9 is made of wood, the fastening points are arranged in a row in the center part of the vertical support 9 in the left-right direction to prevent the vertical support 9 from accidentally cracking.However, since it is in a row, it is difficult to ensure the attachment strength by using screws 22, which are thin fasteners as in the case of steel, so thick fasteners 23, 24 are used. In this case, when attempting to unify (constantly) the arrangement positions of the groove opening pieces 2a, 3a relative to the vertical support 9 of the shallow groove and deep groove guide rails 2, 3, as mentioned above, the arrangement positions of the groove bottom pieces 2b, 3b differ in the left-right direction, and therefore the attachment positions of the rear bent pieces 6e, 7e relative to the vertical support 9 also change left-right, and for this reason, two rows of attachment holes 6i, 7i, 6j, 7j are drilled left and right to correspond to this. The outer mounting holes 6i, 7i in the left-right direction are used to attach the rear bent pieces 6e, 7e to the vertical support 9 when a shallow groove guide rail 2 is used, and the inner mounting holes 6j, 7j are used to attach the rear bent pieces 6e, 7e to the vertical support 9 when a deep groove guide rail 3 is used. Incidentally, when the vertical support 9 is made of wood, the fasteners used are either a screw (coach screw) 23 or a through bolt 24, both of which have a large diameter. However, in the case of a through bolt 24, it is not necessary to insert it into all of the corresponding mounting holes 6i, 7i or 6j, 7j in a row, and in this embodiment, there are no through bolts 24 in the center in the vertical direction.

[0026] In the present embodiment configured as described above, the brackets 6, 7 that support the left and right end edges of the winding body 5 on which the shutter curtain 4 is wound are provided with bracket main body portions 6a, 7a on which the winding body 5 is supported, and lower bent piece portions 6c, 7c that are bent from the lower end edges of the bracket main body portions 6a, 7a and to which a fourth reinforcing member 13 that is supported between the left and right brackets 6, 7 is attached via screws 14a.In this case, the fourth reinforcing member 13 is configured to be attached so that its position in the front-to-back direction can be freely adjusted relative to the lower bent piece portions 6c, 7c.As a result, when the position of the bottommost seat plate 4a of the shutter curtain 4 in the fully open state differs front to back between the exposed fitting specification that fits into the magus space Su above the lower bent piece portions 6c, 7c and the in-ceiling fitting specification that fits into the magus space Sd below, it is possible to install the fourth reinforcing member 13 that corresponds to such specifications. In this case, multiple sets of mounting holes 6f, 6g, 7f, 7g are drilled in the lower folded pieces 6c, 7c corresponding to the mounting positions of the fourth reinforcing member 13, so that the fourth reinforcing member 13 can be mounted easily and accurately with its position in the front-to-rear direction freely adjustable.

[0027] In this case, the fourth reinforcing member 13 is fastened from below to the lower side surface portion 13b via screws 14a to the lower bent pieces 6c, 7c, and is further connected to the bracket main body portions 6a, 7a via connecting fittings 21.In this case, the upper piece portion 21b and front piece portion 21c of the connecting base portion 21a formed on the connecting fittings 21 abut against the upper side surface portion 13a and front side surface portion 13c of the fourth reinforcing member 13, and the front piece portion 21c is fastened via screws 21e inserted in the front-to-back direction.As a result, the fourth reinforcing member 13 is fastened to the brackets 6, 7 from the front-to-back and up-to-down directions, and is firmly attached. Furthermore, when fastening the connecting fittings 21 to the bracket main bodies 6a and 7a, square root bolts 21g, which have a square column-shaped bolt head portion of the threaded portion, are used as fasteners, and the square root bolts 21g are inserted into square mounting holes in the bracket main bodies 6a and 7a in a non-rotating manner, so that secure fastening can be achieved even in places where the bracket main bodies 6a and 7a are close to a body member such as a wall and the bolts 21g cannot be supported to prevent rotation with a tool such as a wrench.

[0028] Of course, the present invention is not limited to the above-described embodiment, but as described above, if the shutter curtain 4 is a product of the same series and has a wide lateral width or a long vertical length, the driving load on the opening / closing mechanism 8 may increase, potentially hindering smooth opening and closing of the shutter curtain 2 or 3. One way to solve this problem is to make the diameter of the driven sprocket 15a larger than that of the above-described embodiment, thereby reducing the load on the opening / closing mechanism 8. However, this would result in an increase in the size of the drive-side bearing 15. As a result, when providing the mounting holes 6h, 7h, 6i, 7i, 6j, and 7j, the larger drive-side bearing 15 may interfere with the mounting holes. Specifically, as shown in Figures 20 and 21, the central mounting holes 6ha and 6ia in the vertical direction among the three mounting holes 6h and 6i on the lateral outsides formed in the drive-side bracket 6 are configured to be biased inward in the lateral direction so as not to be obstructed by the drive-side bearing 15. This configuration also allows the present invention to be implemented. [Industrial Applicability]

[0029] The present invention relates to a shutter for a building that is attached to an opening such as an entrance or exit of a building such as a building or a house. Equipment and It can be used as such. [Explanation of symbols]

[0030] 1. Shutter device 2 Shallow groove guide rail 2a Opening piece 2b Groove bottom piece 2c Guide piece 3-groove deep guide rail 3a Opening piece 3b Groove bottom piece 3c Guide piece 4. Shutter Curtain 4a Seat board 5 Winding body 6 Drive side bracket 6a Bracket body 6c Lower bent piece 6e Rear bending piece 6f, 6g mounting holes 6i, 6j mounting holes 7 Driven side bracket 9 Vertical Support 13 Fourth reinforcement 17 Ceiling moss 18 Exposed Magusa 19 Ceiling Panel 20 Guide roller 21 Connecting fittings 21a base 21d Connecting piece 21e Bis 21f Mounting hole 21g square root bolt E Opening Sd Lower Magus Space Su Upper Magusa Space X guide groove

Claims

1. Guide rails are installed on the left and right sides of the building opening to guide the shutter curtain up and down to open and close the opening; a winding body disposed above and in front of the opening and around which the shutter curtain is wound; Left and right brackets are attached to a body side member in a state in which the left and right end edges of the winding body are supported; a guide piece portion that is incorporated in the bracket and is formed on an upper end edge of the guide rail so as to expand outward in the front-rear direction; A magus space is formed below the guide piece and accommodates the seat plate of the bottom end of the shutter curtain when it is fully opened. a guide roller disposed in front of the guide piece portion and configured to guide the shutter curtain unwound from the winding body to the guide piece portion; The bracket is configured to include a bracket body portion on which the winding body is supported and a lower bent piece portion bent from a lower end edge portion of the bracket body portion, In a shutter device for a building in which two specifications are set, an upper specification in which the magus space is an upper magus space above the lower bent piece portion, and a lower specification in which the magus space is a lower magus space below the lower bent piece portion, The lower side of a reinforcing material having a rectangular tube shape is attached to the lower bent piece, and the reinforcing material is supported by connecting metal fittings on the left and right bracket main bodies. The guide roller is attached to the reinforcing material, The mounting position of the reinforcing material is configured so that the upper type is mounted at a rear mounting position closer to the guide rail than the lower type, The guide roller is attached to the upper side of the reinforcement material in the upper specification, and to the rear side of the reinforcement material in the lower specification, so that the upper specification is attached at a higher height relative to the reinforcement material than the lower specification. This shutter device for buildings is characterized in that the reinforcing material is attached to the lower bent piece and the guide rail main body in a manner that allows for free adjustment of the front-to-rear position so that the upper specification is attached at a rear mounting position closer to the guide rail than the lower specification, and the front-to-rear arrangement position of the guide roller relative to the guide piece is the same for either specification.

2. 2. The shutter device for a building according to claim 1, wherein a plurality of sets of mounting holes are drilled in the lower bent piece in correspondence with mounting positions of the reinforcing material.

3. The connecting fitting is configured to include a connecting base having an upper piece portion and a front piece portion that abut the upper side surface portion and the front side surface portion, and a connecting piece portion that extends upward from the upper piece portion and is connected to the bracket main body portion, 3. A shutter device for a building according to claim 1 or 2, characterized in that the front piece is fastened to the front side portion via a fastening material inserted in the front-to-rear direction.

4. The shutter device for buildings described in claim 3, characterized in that the connecting piece is connected to the bracket main body by fastening using a square root bolt having a square column-shaped bolt head portion of the screw portion, and the square root bolt is inserted into a square-shaped mounting hole provided in the bracket main body in a non-rotating manner.

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