JP6934770B2 - Reinforcement method of hanging bolts and reinforcement structure of hanging bolts - Google Patents

Description

The present invention relates to a method for reinforcing a hanging bolt that supports a ceiling panel and a reinforcing structure for the hanging bolt.

When refurbishing a room that has a ceiling panel supported by hanging bolts hanging from the structural material of the building, if it is necessary to change the interior height of the ceiling panel to a lower level, the length of the hanging bolts needs to be increased. be.

In order to increase the length of the suspension bolt, as shown in FIG. 4, a new suspension bolt 101 has been previously joined to the existing suspension bolt 102 by spot welding 103. Therefore, in an existing building having a ceiling panel 105, there are many existing buildings in which two suspension bolts 101 and 102 are joined by spot welding 103.

As described above, in the case where two suspension bolts 101 and 102 are joined by spot welding 103, when an earthquake or the like occurs, the suspension is added to the old suspension bolt 102 centering on the joint portion of the point welding 103. There is a risk that the bolts 101 and the bolts 101 will twist each other, the spot weld 103 portion will break, and the ceiling panel 105 will fall.

It takes time and effort to replace the two hanging bolts 101 and 102 joined by spot welding 103, or to reinforce the hanging bolts 101 and 102 by welding so that they do not twist each other. It takes.

Therefore, an object of the present invention is to provide a method for reinforcing a suspension bolt and a structure for reinforcing the suspension bolt, which can easily improve the earthquake resistance of the existing suspension bolts joined by spot welding.

In order to solve the above-mentioned problems, in the invention according to claim 1, the suspension bolt for supporting the ceiling panel is composed of two members, a first shaft member and a second shaft member, and the first shaft member and the second shaft member. The shaft member is an existing suspension bolt that partially overlaps in the axial direction and is joined by spot welding.
A connecting member is attached to each of the overlapping portion of the first shaft member and the second shaft member and at both side portions of the spot welded portion in the axial direction of the suspension bolt to connect the first shaft member and the second shaft member. death,
This is a method for reinforcing a hanging bolt, characterized in that the first shaft member and the second shaft member are prevented from twisting with each other around the spot welded portion.

The invention according to claim 2 is the invention according to claim 1, wherein the connecting member is a wire clip.

According to the third aspect of the present invention, the suspension bolt for supporting the ceiling panel is composed of two members, a first shaft member and a second shaft member, and the first shaft member and the second shaft member are partially formed in the axial direction. It is an existing hanging bolt that is joined by spot welding as well as overlapping.
At the overlapping portion of the first shaft member and the second shaft member, and at both side portions of the spot welded portion in the axial direction of the suspension bolt, the first shaft member and the second shaft member are connected by connecting members, respectively.
It is a reinforcing structure of a hanging bolt, characterized in that the first shaft member and the second shaft member are prevented from twisting with each other around the spot welded portion.

In the present invention, the overlapping portion of the first shaft member and the second shaft member, and both side portions of the spot welded portion in the axial direction of the suspension bolt are connected by connecting members, respectively, and the point welded portion is the center of the first. By suppressing the twisting of the 1-axis member and the 2nd-axis member from each other, when an earthquake or the like occurs, the 1-axis member and the 2nd-axis member are mutually centered on the spot welded portion. Twisting can be suppressed, spot welding can be prevented from breaking, and the ceiling panel can be prevented from falling.

As described above, since it is only necessary to attach the connecting member, the earthquake resistance can be easily improved.

The side view which shows the reinforcement structure of the suspension bolt which concerns on embodiment of this invention. FIG. 1 is a cross-sectional view taken along the line AA of FIG. An exploded perspective view of a wire clip used in an embodiment of the present invention. The perspective view which shows the conventional hanging bolt.

A mode for carrying out the present invention will be described with reference to the drawings.

FIG. 1 is a side view showing a reinforcing structure 20 of the suspension bolt 1 according to the first embodiment of the present invention.

First, the existing suspension bolt 1 will be described.

The suspension bolt 1 is composed of a rod-shaped first shaft member 2 and a rod-shaped second shaft member 3, and the first shaft member 2 and the second shaft member 3 are partially overlapped with each other in the axial direction. The first shaft member 2 and the second shaft member 3 are joined to each other by spot welding 5 at an intermediate portion in the overlapping portion 4.

One end of the hanging bolt 1 in the axial direction is joined to a structural member 7 of a building such as a concrete member, a beam made of steel or wood, and a connecting fitting 8 is connected to the other end of the hanging bolt 1. A ceiling panel 9 is attached to the ceiling panel 9, and the hanging bolt 1 is hung from the structural member 7 of the building and supports the ceiling panel 9.

As described above, a method of reinforcing the existing suspension bolt 1 joined by spot welding 5 will be described.

In the overlapping portion 4 of the first shaft member 2 and the second shaft member 3 in the existing suspension bolt 1, the first shaft member 2 and the second shaft member 3 are extended to both side portions of the spot weld 5 in the axial direction thereof, respectively. Then, the connecting members 10 and 10 are attached, the first shaft member 2 and the second shaft member 3 are connected via the connecting member 10, and the first shaft member 2 and the second shaft member 2 are centered on the spot weld 5. Prevents 3 from twisting each other.

The connecting member 10 can prevent the first shaft member 2 and the second shaft member 3 from twisting each other, and when a force acts in the direction in which the first shaft member 2 and the second shaft member 3 twist each other. Any structure can be used as long as it has a structure that does not easily break. A hose band used for the wire, a binding band made of resin and capable of reducing the diameter, or the like can be used. As the hose band, it is preferable to use a hose band whose inner diameter can be reduced by tightening a screw on a metal band.

In this embodiment, the wire clip 11 as shown in FIGS. 2 and 3 is used as the connecting member 10. The wire clip 11 has a U-shaped first member 12 having male threads engraved on both end portions 12a and 12a, and a second member having holes 13a and 13a through which both end portions 12a and 12a of the first member 12 can be inserted. 13 is provided, both ends 12a, 12a of the first member 12 are inserted into the holes 13a, 13a of the second member 13, and the nut 15 is screwed into the male screw engraved in both ends 12a, 12a of the first member 12. By tightening the nut 15, the inner diameter of the mounting hole 16 formed between the first member 12 and the second member 13 can be narrowed.
Then, as shown in FIG. 3, in the overlapping portion 4 of the first shaft member 2 and the second shaft member 3, the first member 12 is fitted from one side in the overlapping direction, and the second member 13 is fitted to the other. Fit from the side,
By arranging the first shaft member 2 and the second shaft member 3 so as to be located in the mounting hole 16 and then tightening the nut 15, both shaft members 2 and 3 can be connected to each other.

The reinforcing structure 20 of the suspension bolt is formed by the first shaft member 2, the second shaft member 3, the spot weld 5, and the connecting member 10.

As described above, by attaching the two connecting members 10 and 10 to both side portions of the spot weld 5 in the axial direction at the overlapping portion 4 of the suspension bolt 1, the first shaft member 2 is centered on the spot weld 5. And the second shaft member 3 are suppressed from twisting each other, and even when shaking occurs due to an earthquake or the like, the first shaft member 2 and the second shaft member 3 are suppressed from twisting each other. As described above, the possibility that the spot weld 5 is broken can be reduced, and the ceiling panel 9 can be prevented from falling.

1 Suspension bolt 2 1st shaft member 3 2nd shaft member 4 Overlapping part 5-point welding 9 Ceiling panel 10 Connecting member 11 Wire clip 20 Reinforcing structure of hanging bolt

Claims (3)

The hanging bolt that supports the ceiling panel is composed of two members, a first shaft member and a second shaft member. The first shaft member and the second shaft member partially overlap in the axial direction and are joined by spot welding. It is an existing hanging bolt that has been installed.
A connecting member is attached to each of the overlapping portion of the first shaft member and the second shaft member and at both side portions of the spot welded portion in the axial direction of the suspension bolt to connect the first shaft member and the second shaft member. death,
A method for reinforcing a hanging bolt, characterized in that the first shaft member and the second shaft member are prevented from twisting with each other around the spot welded portion. The method for reinforcing a hanging bolt according to claim 1, wherein the connecting member is a wire clip. The hanging bolt that supports the ceiling panel is composed of two members, a first shaft member and a second shaft member. The first shaft member and the second shaft member partially overlap in the axial direction and are joined by spot welding. It is an existing hanging bolt that has been installed.
At the overlapping portion of the first shaft member and the second shaft member, and at both side portions of the spot welded portion in the axial direction of the suspension bolt, the first shaft member and the second shaft member are connected by connecting members, respectively.
A structure for reinforcing a hanging bolt, characterized in that the first shaft member and the second shaft member are prevented from twisting with each other around the spot welded portion.

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