JP7628046B2 - Mounting structure of support member in building shutter device - Google Patents

Description

The present invention relates to the technical field of the mounting structure of support members in building shutter devices that open and close openings such as entrances and exits of buildings.

Generally, at an opening such as an entrance/exit of a building or other structure, 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 take-up 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) which 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 in one of the left and right directions 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).

JP 2020-109252 A

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 (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 (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 the fastening device 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.

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 a building, which comprises 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 at right angles to the main body, and is configured as follows: The mounting structure for a support member in a building shutter device is characterized in that the support member is supported by a first mounting portion on an upper side and a second mounting portion on a lower side, and in order to set the fastening force of the first mounting portion greater than the fastening force of the second mounting portion, a mounting plate extending from the main body in each of the up, down, left and right directions is provided on the main body side edge portion of the main body, and the first and second mounting portions 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 portions of the main body portion of the support member.
The invention of claim 2 is an attachment structure for a support member in a building shutter device described in claim 1, characterized in that a reinforcing plate extending in both left and right directions is provided on the body side edge portion of the main body, and the attachment plate is attached to the main body portion via the reinforcing plate.
The invention of claim 3 is an attachment structure for a support member in a building shutter device described in claim 1 or 2, characterized in that a tapping bolt is used as a fastening device for attaching the first and second attachment parts, which is screwed into the body side member in a state in which the body side member is plastically deformed by being screwed into the body side member.
The invention of claim 4 relates to a shutter device for buildings, which comprises 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 on 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 that supports the left and right end portions of the take-up body, and a mounting part that is provided at right angles to the main body and is attached to the structural member via a fastener. The mounting structure for a support member in a shutter device for a building has a first mounting portion on the side and a second mounting portion on the lower side, and when setting the fastening force of the first mounting portion to be greater than the fastening force of the second mounting portion, the fastener for making the fastening force of the first mounting portion greater than the fastening force of the second mounting portion comprises a bolt portion and a nut portion, and the nut portion is integrally provided with a deformation portion that buckles and deforms when held 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 an attachment structure for a support member in a building shutter device described in any one of claims 1 to 4 , characterized in that the fastening force of the first attachment part is made greater than that of the second attachment part by making the number of fasteners in the first attachment part greater than that of the second attachment part.

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 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 upper 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.
Furthermore, 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 range of conditions, which further contributes to the strong mounting of the support member.
By adopting the invention of claim 2 , the support member is provided with reinforcing plates extending in both left and right directions from the edge portion of the main body portion facing the body, thereby further reinforcing the body side portion of the support member.
By adopting the invention of claim 3 , a tapping bolt is used as the 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.
By adopting the invention of claim 4 , 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 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.
Furthermore, 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.
By adopting the invention of claim 5 , 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 of 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.

FIG. FIG. FIG. 4A and 4B are a side view and a plan view of a drive side support member. 4A and 4B are a side view and a plan view of a driven side support member. 4A and 4B are front views of a driving side support member and a driven side support member. 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. 5A and 5B are front views showing a fastened state of the mounting plates in the first and second embodiments. 13A and 13B are longitudinal cross-sectional views showing the state before and after fastening of the second fastener, and FIG. 13C is a transverse cross-sectional view showing the fastened state of the first attachment portion.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings, 1 is a shutter device for a building that is installed at an opening E such as an entrance or exit of 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 guided by the guide rails, a winding body (winding drum, winding wheel) 4 arranged above the opening E and on which the shutter curtain 3 is wound, driving side and driven side support members (brackets, bearing plates) 5 and 6 that support the left and right ends of the winding body 4, and an electric opening and closing machine 7 provided on the driving side support member 5 and that rotates the winding body, all of which are the same as in the conventional case. In the drawings, C is 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.

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 the drive side main body 5a has an auxiliary bracket 7a attached to its front-rear end, to which an opening/closing machine 7 is attached. 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 adjusted freely by being fixed with a bolt through a long hole 7f. 7g is an adjuster screw mechanism for fixing the position of the auxiliary bracket 7a after the position adjustment.

Next, the structure of attaching the two support members 5 and 6 to the rectangular tubular beam 8, which is an example of a body side member, will be described. However, since the specific structure of the main body parts 5a and 6a of the two support members 5 and 6 and the attachment structure to the beam 8 are almost the same, the driving side support member 5 will be described in detail below, and the driven side support member 6 will be omitted except for the explanation of the parts that differ from the driving side support member 5. In this case, unless particularly necessary, the word "driving side" will be omitted from the following description. In addition, for the drawer symbols of each member of the driven side support member 6, the numbers of the drawer symbols will be changed from "5" to "6" for those that are the same as the corresponding members of the driving side support member 5, but the English letters will be given as they are. For example, if the drawer symbol "5a" is given to the main body part of the driving side support member 5 as described later, the drawer symbol "6a" will be given to the main body part of the driven side support member 6.

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 a body-side end edge 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 portion 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 main 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 portions 6h and 6g and is then attached to the main body portion 6a via bolts 4d.

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 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 on the side of the frame-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 frame-side folded piece 5f in cases where the reinforcing plate 9 is not provided).
The support member 5 is assembled in a factory by assembling the main body 5, reinforcing plate 9, and mounting plate 10, which are then transported to the installation site of the shutter device 1 and attached to the beam 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 Figure 7.

The support member 5 is fastened to the beam 8 using first and second fasteners 11, 12 described below in order 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 which fastens 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, and forming a female screw portion on the inner peripheral surface of the pilot hole 8a by plastic deformation. Fastening using the tapping bolt 11 can obtain a fastening force (shear force and pull-out force) greater than that obtained when using a fastener such as a tapping screw of the same diameter that is normally used. Moreover, since the tapping bolt 11 exerts such a large fastening force but does not require a nut, it can be easily fastened 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.

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 attachment 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.

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 tubular 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 12, 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's 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.
Furthermore, 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 in 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.

In the present embodiment configured as described above, the support members 5 and 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 member, via the upper and lower first and second attachment parts 10a and 10b provided on the support members 5 and 6. In this case, the fastening force of the upper first attachment part 10a is greater than the fastening force of the lower second attachment part 10b. As a result, the strong fastening force of the upper first attachment part 10a, which has a stronger fastening force, works effectively against the load in the direction in which the upper edge of the support members 5 and 6 rotates in an arc shape with the lower edge of the support members 5 and 6 as a fulcrum, and the support members 5 and 6 can be attached to the structural side, which has excellent strength.

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, so that the support members 5, 6 can be fastened in a wide state, particularly in the left-right direction, to the main body portions 5a, 6a, which further contributes to the attachment of the support members in terms of their excellent strength.
In addition, a reinforcing plate 9 extending in both the left and right directions is provided on the body side edge portion of the main body portions 5a, 6a, and the mounting plate 10 having the 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.

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 fastening device 12 to make the fastening force greater than that of the second mounting portion. The nut portion 12b has an integral tubular portion 12f which buckles and deforms when clamped between the beam material 8 and the nut portion 12b when 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.

The present invention is of course not limited to the above embodiment, and the fastening force of the upper first attachment portion 10a may be greater than the fastening force of the lower second attachment portion 10b, as shown in FIG. 8(B), in which all first attachment portions 10a are first fasteners 11, and the number of fasteners 11 may be greater than that of the second attachment portions 10b. In this way, the same fasteners 11 can be used on the top and bottom, with only the number being different, and a support member with increased strength can be attached while improving the efficiency of the installation work.

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.

REFERENCE SIGNS LIST 1 Shutter device 2 Guide rail 3 Shutter curtain 4 Winding body 5 Driving side support member 5a Main body portion 5f Frame side bent piece portion 6 Driven side support member 8 Beam material (frame side member)
9 Reinforcing plate 10 Mounting plate 10a First mounting portion 10b Second mounting portion 11 First fastener 11a Male screw portion 12 Second fastener 12a Bolt portion 12b Nut portion 12h Deformation portion

Claims (5)

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. 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. 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. 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,
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. 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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