Mounting structure of support member in building shutter device

Abstract

To provide a shutter device 1 in which a fastening force of a taking-up body 4 for taking up a shutter curtain 3 to a skeleton side member works effectively with respect to a load in a direction in which an upper end edge part rotates in a circular manner with lower end edge parts of supporting members 5, 6 being a fulcrum.SOLUTION: In the case where the supporting members 5, 6 for supporting the taking-up body 4 for taking up the shutter curtain 3 are mounted on a beam material 8 which is a skeleton side member via upper and lower first and second mounting parts 10a, 10b provided at the support members 5, 6, a fastening force of the upper first mounting part 10a is made to be larger than a fastening force of the lower second mounting part 10b by using a second fastening tool 12 in which a nut part 12b deforms by buckling.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to the technical field of a mounting structure for a support member in a building shutter device that opens and closes an opening such as an entrance or exit of a building. [Background technology]

[0002] Generally, at an opening such as an entrance / exit of a building, a shutter device for a building may be installed which is composed of various components such as guide rails provided on the left and right sides of the opening, a shutter curtain which is guided by the guide rails to open and close the opening, and a winding body (winding drum, winding wheel) which is disposed above the opening and winds up the shutter curtain. In such a shutter device, the winding body is configured so that both left and right end edges are supported so as to be freely rotatable on support members (brackets, bearing plates) that are attached to the main body side members, and for this reason the support members need to be firmly attached to the main body in a state capable of withstanding the weight of the winding body and the shutter curtain combined. Nowadays, when assembling a shutter device on-site, so-called fireless installation without welding (on-site installation without welding) is recommended, including from the standpoint of fire prevention. Therefore, in the past, a support member for attaching such a support member to the main body without fire (on-site attachment without welding) has been known which comprises a flat main body supporting each of the left and right edge portions of the winding body, and an attachment piece bent to one side in the left-right direction from the main body edge portion on the main body side, and which is attached in a cantilever manner to the main body side member via a fastener such as a screw (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-109252 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, because the support member is attached in a cantilever manner to the main body side member in this manner, the fastening device used for this attachment is not only subjected to a downward load (a load in the shear direction) resulting from the weight of the roll-up body and the shutter curtain, but also a load based on a moment in the direction in which the upper edge of the attachment piece moves downward in an arc with the lower edge as a fulcrum (a load in the direction in which the fastener is pulled out), due to the cantilevered attachment; therefore, the support member needs to be firmly attached to the main body side via fasteners so that it can withstand these loads. Therefore, in the conventional device, when the mounting piece is attached to the main body, it is attached not only via a first screw that is screwed vertically into the main body member, but also via a second screw that is inclined upward and downward. However, in the conventional system, not only must a mounting plate (flat plate) with a specially shaped inclined support surface be used to receive and support the inclined head of the second screw, but there is also a gap between the inclined support surface and the structure side component, so the head of the second screw is supported in an unstable state with a gap between it and the structure side component, making it difficult to exert sufficient fastening force. These are the problems that the present invention aims to solve. [Means for solving the problem]

[0005] The present invention has been created in view of the above-mentioned circumstances and with the objective of solving these problems. The invention of claim 1 relates to a shutter device for buildings comprising guide rails provided on the left and right sides of an opening such as an entrance or exit of a building, a shutter curtain that is guided by the guide rails to open and close the opening, a take-up body that is provided above the opening and around which the shutter curtain is wound, and a support member that is attached to a structural member and supports the take-up body, the support member being made up of a main body portion that supports the left and right end edges of the take-up body, and an attachment portion that is provided at right angles to the main body portion and is attached to the structural member via a fastener. It is provided, The mounting portion includes a first mounting portion on the upper side and a second mounting portion on the lower side. Has The fastening force of the first attachment part is set to be greater than that of the second attachment part. In this case, a mounting plate extending in each of the up, down, left and right directions from the main body is provided at the frame side edge of the main body, and the first and second mounting parts are formed wide in each of the left and right directions at portions extending in each of the up and down directions beyond the upper and lower edge parts of the main body of the support member. The present invention relates to a mounting structure for a support member in a shutter device for a building. The invention of claim 2 is characterized in that a reinforcing plate extending in each of the left and right directions is provided on the frame side edge of the main body, and the mounting plate is attached to the main body via the reinforcing plate. 1 4 is a mounting structure for a support member in the described building shutter device. The invention of claim 3 is characterized in that a tapping bolt is used as a fastener for attaching the first and second attachment parts, which is screwed into the frame member in a state in which the frame member is plastically deformed by being screwed into the frame member. OR 2 4 is a mounting structure for a support member in the described building shutter device. The invention of claim 4 is as follows: In a shutter device for a building comprising guide rails provided on the left and right sides of an opening such as an entrance or exit of a building, a shutter curtain that is guided by the guide rails to open and close the opening, a take-up body that is disposed above the opening and around which the shutter curtain is wound, and a support member that is attached to a structural member and supports the take-up body, the support member comprises a main body portion that supports the left and right edge portions of the take-up body, and a mounting portion that is provided at right angles to the main body portion and is attached to the structural member via a fastener, the mounting portion having an upper first mounting portion and a lower second mounting portion, and when the fastening force of the first mounting portion is set to be greater than the fastening force of the second mounting portion, This is an attachment structure for a support member in a shutter device for a building, characterized in that a fastening device for making the fastening force of the first attachment portion greater than the fastening force of the second attachment portion is comprised of a bolt portion and a nut portion, and the nut portion is integrally provided with a deformation portion that buckles and deforms when clamped between the body side member and the nut portion based on the bolt portion being screwed into the nut portion, thereby increasing the pull-out strength of the bolt portion. The invention of claim 5 is characterized in that the fastening force of the first mounting portion is made larger than that of the second mounting portion by making the number of fasteners in the first mounting portion larger than that of the second mounting portion. 4 1 is a mounting structure for a support member in a shutter device for a building according to any one of the above. Effect of the Invention

[0006] By adopting the invention of claim 1, in a shutter device for a building, when a support member for supporting the roll-up body that rolls up the shutter curtain is attached to a structural member via the upper and lower first and second attachment parts provided on the support member, the fastening force of the first attachment part is greater than the fastening force of the second attachment part, so that the support member effectively acts against loads in the direction of rotating in an arc shape with the lower edge part of the support member as a fulcrum, and the support member can be attached to the structural member side, which has excellent strength. Moreover, The first and second mounting portions are provided in a wide state extending in all directions, up, down, left and right, from the main body of the support member, allowing fastening in a wide state, which further contributes to the strong mounting of the support member. Claim 2 By using this invention, the support member is provided with reinforcing plates extending in both the left and right directions from the edge portion of the main body portion facing the frame, thereby further reinforcing the frame side portion of the support member. Claim 3 According to the invention, a tapping bolt is used as a fastening device for attaching the first and second mounting parts, which is screwed into the body side member in a state in which the body side member is plastically deformed when screwed into the body side member. As a result, a stronger fastening force (shear force, pull-out force) is exerted compared to fastening devices such as ordinary tapping screws, and a stronger attachment of the support member can be achieved simply by screwing in the tapping bolt. Claim 4 By making it an invention of In a shutter device for buildings, when a support member for supporting the roll-up body that rolls up the shutter curtain is attached to a structural member via upper and lower first and second attachment parts provided on the support member, the fastening force of the first attachment part is greater than the fastening force of the second attachment part, so that the support member effectively acts against loads in the direction of rotating the upper edge in an arc with the lower edge part of the support member as a fulcrum, allowing the support member to be attached to the structural member side, which has superior strength. Moreover,The fastener for attaching the first attachment part comprises a bolt part and a nut part, and the nut part is integrally provided with a deformation part that buckles and deforms when held between the body side member and the nut part when the bolt part is screwed into the nut part, thereby increasing the pull-out strength of the bolt part.As a result, the first attachment part can be fastened to the body side member with even stronger fastening force (particularly pull-out force) simply by screwing in the bolt part. Claim 5 By adopting this invention, the fastening force of the first mounting portion can be made greater than that of the second mounting portion by increasing the number of fasteners in the first mounting portion compared to the second mounting portion. As a result, the same fasteners can be used on the top and bottom, with the only difference being the number of fasteners, making it possible to attach a support member with increased strength while improving the efficiency of the installation work. [Brief description of the drawings]

[0007] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] 13A and 13B are a side view and a plan view of a drive-side support member. [Diagram 5] 13A and 13B are a side view and a plan view of a driven-side support member. [Figure 6] 13A and 13B are front views of a driving side support member and a driven side support member. [Figure 7] 13 is an explanatory diagram of the operation, in which the welded portion of the mounting plate to the reinforcing plate is shown in a hatched state. FIG. [Figure 8] 5A and 5B are front views showing a fastened state of the mounting plates in the first and second embodiments. [Figure 9] 13(A) and (B) are longitudinal cross-sectional views showing the states before and after fastening of the second fastener, and (C) is a transverse cross-sectional view showing the fastened state of the first attachment portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings, 1 denotes a shutter device for a building that is installed at an opening E such as an entrance or exit of a building such as a building or a house. The shutter device 1 is configured using various members and devices, such as guide rails 2 provided on the left and right sides of the opening E, a shutter curtain 3 that moves to open and close the opening E while being guided by the guide rails, a winding body (winding drum, winding wheel) 4 that is arranged above the opening E and on which the shutter curtain 3 is wound, driving side and driven side support members (bracket, bearing plate) 5, 6 that support the left and right ends of the winding body 4, and an electric opening / closing device 7 that is provided on the driving side support member 5 and drives the winding body to rotate, all of which are the same as in the conventional case. In the drawings, C denotes a shutter case. In addition, in this embodiment, the shutter device 1 is an electric shutter device because it uses an electric opening / closing mechanism 7, but it goes without saying that the present invention can also be implemented in a manual type shutter device that does not have an opening / closing mechanism 7.

[0009] The support members 5, 6 are each comprised of a main body 5a, 6a provided with drive side and driven side bearings 4a, 4b which support the support shafts 4c at the left and right edges of the winding body 4, and an auxiliary bracket 7a is attached to the front-rear end of the drive side main body 5a, and an opening / closing machine 7 is mounted on the auxiliary bracket 7a. An endless transmission chain 7d is hung between a drive side sprocket 7b provided on the opening / closing machine 7 and a driven side sprocket 7c provided on the support shaft 4c supported by the drive side bearing 4a, thereby linking the opening / closing machine 7 and the winding body 4, and the shutter curtain 3 is wound on and unwound from the winding body 4 based on the forward and reverse drive of the opening / closing machine 7. In addition, 7e is a bolt for attaching the auxiliary bracket 7a to the main body 5a, and the auxiliary bracket 7a is attached so that its position in the front-rear direction can be freely adjusted by being fixed with a bolt via a long hole 7f. 7g is an adjuster screw mechanism for fixing the position of the auxiliary bracket 7a after the position adjustment.

[0010] Next, the structure of attaching the two support members 5 and 6 to the beam 8, which is a rectangular tubular member, will be described. However, the specific structure of the main body 5a and 6a of the two support members 5 and 6 and the structure of attaching them to the beam 8 are almost the same, so the drive side support member 5 will be described in detail below, and the driven side support member 6 will be omitted except for the parts that are different from the drive side support member 5. In this case, the word "drive side" will be omitted from the following description unless it is particularly necessary. Regarding the lead-out symbols of each member of the driven side support member 6, the numbers of the lead-out symbols will be changed to "6" instead of "5" for those that are the same as the corresponding members of the drive side support member 5, but the English letters will be used as they are. For example, if the lead-out symbol "5a" is attached to the main body of the drive side support member 5 as described later, the lead-out symbol "6a" will be attached to the main body of the driven side support member 6.

[0011] The support member 5 is configured with a main body 5a, which is configured by butting a pair of plate materials 5b together from the left and right with a gap between them. Vertical groove-shaped recessed portions 5c are formed above and below the portion where the bearing portion 4a is fixed via the bolt 4d, and the plate materials 5b are fixed to each other via the bolts 5d with the recessed portions 5c abutting each other from the left and right. Furthermore, the plate materials 5b have upper and lower end edges and the edge portion on the side of the body bent outward in the left-right direction to form upper and lower folded pieces 5e and body-side folded pieces 5f. The body side portion of the support member 5 is fitted with an U-shaped reinforcing plate (reinforcing material) 9 having a spanning portion 9a that abuts the body side folded piece 5f and legs 9b that abut the upper and lower folded piece portions 5e, and the support member 5 and the reinforcing plate 9 are fixed together by welding, so that the support member 5 is reinforced by the reinforcing plate 9. On the other hand, with respect to the driven side support member 6, a groove 6g is formed in the main body 6a for moving the spindle 4c on which the driven side bearing portion 4b is fitted toward the body side and setting it in the mounting position, and an auxiliary member 6i having a groove portion 6h formed therein is welded to the front end edge portion. The driven side bearing portion 4b with the spindle 4c fitted therein is set in the mounting position by moving the groove portion 6h and the groove 6g, and is attached to the main body portion 6a via the bolt 4d.

[0012] Reference numeral 10 denotes an attachment plate integrated with the straddling portion 9a of the auxiliary plate 9 by welding, and the attachment plate 10 is made of a wide flat plate material extending in each of the up, down, left and right directions from the main body portion 5a, thereby further reinforcing the frame side portion of the support member 5. The portions extending in each of the up and down directions from the upper and lower end edges of the main body portion 5a of the attachment plate 10 are wide in the left and right directions and constitute first and second attachment portions 10a, 10b on both the upper and lower sides, and the first and second attachment portions 10a, 10b are attached to the beam material 8, so that the support member 5 is attached in a cantilevered manner to the frame side. In this embodiment, the first and second mounting portions 10a, 10b serving as the "mounting portions" of the present invention are integrally formed from a single plate-like mounting plate 10 as described above, thereby further increasing the strength of the portion of the support member 5 facing the body-side folded piece 5f. However, it goes without saying that the present invention can also be implemented by constructing the first and second mounting portions 10a, 10b using separate plate materials divided into upper and lower halves and attaching them to the reinforcing plate 9 (or to the body-side folded piece 5f in cases where the reinforcing plate 9 is not provided). The support member 5 is assembled in a factory by the main body 5, reinforcing plate 9, and mounting plate 10, and is then transported to the installation site of the shutter device 1 and attached to the beam material 8, which is a structural member, via fasteners 11 and 12 as described below, thus enabling on-site installation without fire and without welding the support member 5. Note that the welded portion of the mounting plate 10 to the reinforcing plate 9 is shown by the hatched portion in Fig. 7.

[0013] The support member 5 is fastened to the beam 8 using first and second fasteners 11, 12 described below to attach the first and second mounting portions 10a, 10b to the beam 8. In this embodiment, the first and second mounting portions 10a, 10b are fastened at three locations on the left and right sides with gaps between them, and a tapping bolt 11 is used as the first fastener 11 to fasten all three locations, two on both the left and right sides of the first mounting portion 10a and the second mounting portion 10b. The tapping bolt 11 is fastened by forcibly screwing the male screw portion 11a loosely fitted in the bolt hole 10c formed in the first and second mounting portions 10a and 10b into a pilot hole 8a drilled in the beam 8, which is smaller in diameter than the male screw portion 11a, while forming a female screw portion on the inner peripheral surface of the pilot hole 8a by plastic deformation, and by fastening using the tapping bolt 11, a fastening force (shear force and pull-out force) larger than that obtained by using a fastener such as a tapping screw of the same diameter that is normally used can be obtained. Moreover, since the tapping bolt 11 exerts such a large fastening force but does not require a nut, the fastening work can be easily performed by operating from one direction from the screwing operation side at a site where it is difficult to place a nut on the back side of the screwing because the structural member is a cylindrical member such as the beam 8 as in this embodiment.

[0014] On the other hand, as in the present embodiment shown in Figure 8 (A), a second fastener 12 is used as a fastener on the central side of the first mounting portion 10a, and the second fastener 12 is capable of obtaining an even greater fastening force (pull-out resistance force) than the tapping bolt 11, and is configured with a bolt portion 12a and a nut portion 12b. The bolt portion 12a has a bolt head 12c and a male screw portion 12d, while the nut portion 12b is tubular and long in the axial direction so as to pass through the pilot hole 8b formed in the beam material 8, and is configured with a flange-shaped portion 12e that abuts against the bolt head 12c, a tubular portion 12f that fits loosely from the flange-shaped portion 12e onto the male screw portion 12d, and a female screw portion 12g that screws into the male screw portion 12d.

[0015] Then, with the first or second mounting portion 10a, 10b butted against the beam material 8, the second fastener 12 loosely fits the nut portion 12b into a bolt hole (larger in diameter than the bolt hole 10c for the first fastener 11) 10d formed in the first and second mounting portions 10a, 10b and into a pilot hole 8b formed in the beam portion 8 and having a larger diameter than the pilot hole 8a, so that the flange portion 12e abuts against the first and second mounting portions 10a, 10b, and the tip portion of the cylindrical portion 12f and the female screw portion 12g penetrate through the pilot hole 8b, and forcibly rotates the bolt head 12c. By rotating the second fastener, the female thread portion 12g is forcibly moved toward the beam 8, whereby the tubular portion 12f protruding from the beam 8 is folded back into a flange shape due to plastic deformation, and the deformed portion 12h which has been bulged and deformed comes into close contact with the side surface of the beam 8 body, thereby fastening the fastener.By fastening the fastener using the second fastener 12 in this manner, it is possible to obtain an even greater fastening force (especially the pull-out force) than when the tapping bolt 11 of the same diameter is used. This second fastener 12 can be fastened with an even greater fastening force than the tapping bolt 11, but like the tapping bolt 11, does not require a separate nut. Therefore, in cases where the body side component (the component to be fastened) is a tubular component and it is difficult to place a nut on the back side of the screwing, not only can the fastening work be easily performed by operating from one direction from the screwing operation side, but also, in combination with the adoption of the tapping bolt 11 as described above, it is suitable for use in cases where a fireless construction method that does not involve welding on site is adopted. Incidentally, when fastening using the second fastener 12, it is necessary to restrict the co-rotation of the nut portion 12b with the bolt portion 12a. For this reason, the second fastener 12 can be fastened by, for example, restricting the rotation of the nut portion 12b using a tool such as a wrench, and then turning the bolt portion 12a.

[0016] In the present embodiment configured as described above, the support members 5, 6 for supporting the roll-up body 4 that rolls up the shutter curtain 3 as a shutter device 1 for a building that opens and closes an opening are attached to the beam 8, which is a structural body member, via the upper and lower first and second mounting portions 10a, 10b provided on the support members 5, 6. In this case, the fastening force of the upper first mounting portion 10a is greater than the fastening force of the lower second mounting portion 10b, so that the strong fastening force of the upper first mounting portion 10a, which has a stronger fastening force, acts effectively against the load in the direction in which the upper edge of the support members 5, 6 rotates in an arc shape with the lower edge of the support members 5, 6 as a fulcrum, and the support members 5, 6 can be attached to the structural body side, which has excellent strength.

[0017] Furthermore, in this case, the first and second mounting portions 10a, 10b are provided in a wide state extending in all directions, up, down, left and right, from the main body portions 5a, 6a of the support members 5, 6. As a result, the support members 5, 6 can be fastened in a wide state, particularly in the left and right directions, to the main body portions 5a, 6a, which further contributes to the attachment of the support members in terms of strength. In addition, a reinforcing plate 9 extending in both the left and right directions is provided on the frame side edge portion of the main body portions 5a, 6a, and the mounting plate 10, which has first and second mounting portions 10a, 10b, is attached to the main body portions 5a, 6a via the reinforcing plate 9, thereby further reinforcing the support members 5, 6.

[0018] In this way, the support members 5, 6 are firmly attached to the main body. Furthermore, in this embodiment, a tapping bolt 11 is used as the first fastener 11 for attaching the first and second mounting portions 10a, 10b, which is screwed into the main body member in a state in which it plastically deforms the main body member when screwed into it. This provides a stronger fastening force than fasteners consisting of ordinary bolts and nuts, allowing for a stronger attachment of the support members. In addition, the first mounting portion 10a is equipped with a bolt portion 12a and a nut portion 12b as a fastener 12 to make the fastening force greater than that of the second mounting portion. The nut portion 12b is integrally provided with a tubular portion 12f which buckles and deforms when clamped between the beam material 8 and the nut portion 12b as the bolt portion 12a is screwed into the nut portion 12b, thereby serving as a deforming portion to increase the pull-out strength of the bolt portion 12a. As a result, the upper first mounting portion 10a can be fastened with a stronger fastening force, which can further contribute to reinforcing the support members 5 and 6.

[0019] Of course, the present invention is not limited to the above-described embodiment, and the fastening force of the upper first mounting portion 10a may be made greater than the fastening force of the lower second mounting portion 10b, as shown in FIG. 8(B), where all first mounting portions 10a are made of first fasteners 11, the number of fasteners 11 may be greater than that of second mounting portions 10b. In this way, the same fasteners 11 can be used for both the top and bottom, with the only difference being the number, making it possible to attach a support member with increased strength while improving the efficiency of the installation work. [Industrial Applicability]

[0020] The present invention can be used as a mounting structure for a support member in a building shutter device that opens and closes openings such as entrances and exits of buildings such as buildings. [Explanation of symbols]

[0021] 1 Shutter device 2 Guide rails 3. Shutter Curtain 4 Winding body 5 Drive side support member 5a Main body 5f Body side bent piece 6. Driven side support member 8 Beams (structure side components) 9 Reinforcement plate 10 Mounting plate 10a First mounting part 10b Second mounting part 11 First fastener 11a Male thread 12 Second fastener 12a Bolt section 12b Nut part 12h Deformation part

Claims

1. A shutter device for a building is configured with guide rails provided on the left and right sides of an opening such as an entrance or exit of a building, a shutter curtain that is guided by the guide rails to open and close the opening, a winding body that is disposed above the opening and around which the shutter curtain is wound, and a support member that is attached to a structural member and supports the winding body, The support member is provided with a main body portion on which the left and right end edges of the winding body are supported, and a mounting portion that is provided at a right angle to the main body portion and is attached to a body side member via a fastener, The mounting portion includes a first mounting portion on an upper side and a second mounting portion on a lower side, When the fastening force of the first attachment portion is set to be greater than the fastening force of the second attachment portion, An attachment structure for a support member in a building shutter device, characterized in that an attachment plate extending in each of the up, down, left and right directions from the main body is provided on the edge portion of the main body on the structure side, and the first and second attachment portions are formed to be wider in each of the left and right directions at portions that extend in each of the up and down directions further than the upper and lower edge portions of the main body of the support member.

2. The mounting structure for a support member in a shutter device for a building as described in claim 1, characterized in that a reinforcing plate extending in each of the left and right directions is provided on the body side edge portion of the main body, and the mounting plate is attached to the main body portion via the reinforcing plate.

3. An attachment structure for a support member in a building shutter device as described in claim 1 or 2, characterized in that a tapping bolt is used as a fastener for attaching the first and second attachment parts, which is screwed into the main body side member in a state in which the main body side member is plastically deformed by being screwed into the main body side member.

4. A shutter device for a building comprising guide rails provided on the left and right sides of an opening such as an entrance or exit of a building, a shutter curtain that is guided by the guide rails to open and close the opening, a take-up body that is disposed above the opening and around which the shutter curtain is wound, and a support member that is attached to a structural member and supports the take-up body, The support member is provided with a main body portion on which the left and right end edges of the winding body are supported, and a mounting portion that is provided at a right angle to the main body portion and is attached to a body side member via a fastener, The mounting portion includes a first mounting portion on an upper side and a second mounting portion on a lower side, When the fastening force of the first attachment portion is set to be greater than the fastening force of the second attachment portion, A mounting structure for a support member in a shutter device for a building, characterized in that a fastening device for making the fastening force of a first mounting portion greater than the fastening force of a second mounting portion is used, the fastening device comprising a bolt portion and a nut portion, the nut portion having an integral deformation portion that buckles and deforms when clamped between the main body side member and the nut portion based on the bolt portion being screwed into the nut portion, thereby increasing the pull-out strength of the bolt portion.

5. An attachment structure for a support member in a building shutter device as described in any one of claims 1 to 4, characterized in that the fastening force of the first attachment portion is made greater than that of the second attachment portion by making the number of fasteners in the first attachment portion greater than that of the second attachment portion.

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