JP2024172432A - Anti-fall fittings for hanging fixtures - Google Patents

Abstract

[Problem] To provide a fall prevention fitting that can prevent the fastening bolt of the hanging fitting from falling off the shaped steel material even if it becomes loose due to vibration, etc., when attaching the hanging fitting that supports the hanging bolt for installing piping, facility equipment, electrical appliances, etc. to the flange portion of the shaped steel material such as a channel steel or angle bar during facility construction of a structure, and that will not deform due to horizontal loads during an earthquake.
[Solution] The device comprises a locking body 10 that locks onto the shaped steel material, a connecting bolt 40 that is inserted into a through hole of the locking body, a receiving body 50 that clamps the hanging hardware together with the locking body, and a nut 60. The locking body consists of a locking piece 11 that locks onto the shaped steel material and a fixed piece 12 that bends and extends from the locking piece, and a through hole 51 is provided in the locking piece at a position where the shaft 42 of the connecting bolt can be clamped between the fixed piece and the horizontal surface of the horizontal flange of the shaped steel material, so that the head 41 of the connecting bolt locks onto the corner of the shaped steel material.
[Selected Figure] Figure 1

Description

The present invention relates to a fall prevention fitting that prevents the tightening bolt from loosening due to repeated vibrations, etc., or from coming out of the horizontal flange due to horizontal force loads caused by earthquakes, etc., when the hanging fitting that supports the hanging bolt for suspending pipes, equipment, electrical appliances, etc. is attached to the horizontal flange of shaped steel material such as channel steel or angle bar during facility construction of a structure.

Conventionally, the following types of fittings have been disclosed as anti-falling devices for hanging fittings, which have an opening inserted into the horizontal flange of a steel section and clamp the horizontal flange from above and below with a tightening bolt provided on one side of the opening.
It consists of a locking body that locks onto the steel structural material, a connecting body that connects to a hanging hardware attached to the horizontal flange, and a connecting bolt that is inserted into the locking body and connecting body and screwed down with a nut, the connecting bolt being a metal fitting inserted into a through hole provided in the locking piece of the locking body (Patent Document 1).
Also, there is a metal fitting (Patent Document 2) which has a similar configuration to the above, but in the part which serves as the locking body, a through hole for inserting a connecting bolt is provided below the part which locks onto the rear surface of the structural steel.

Registered Utility Model No. 3046369 Design Registration No. 1457128

Because the load is applied to the hanging hardware in the direction of pulling out from the horizontal flange, the configuration of the fall prevention hardware described above has the reaction force against that load borne by the locking body that locks to the back of the shaped steel material via the connecting bolt from the connecting body that connects to the back of the hanging hardware. When the load of the connecting bolt is received by the locking piece as in Patent Document 1, it is necessary to select a material with a plate thickness that has an appropriate strength so that the locking piece does not deform under the load. Also, as in Patent Document 2, when the position of the connecting bolt is separated from the locking piece and the load direction is eccentric, bending stress is generated in the locking piece, which increases the deformation, so as above, it is necessary to select a material with a plate thickness that has an appropriate strength so that it does not deform under the load, and it is also necessary to process the locking piece so that it abuts obliquely against the back of the shaped steel material to resist bending stress.

The present invention was developed in consideration of the above-mentioned problems with the conventional technology, and its purpose is to provide a lightweight, easy-to-handle anti-fall fitting that uses thin steel plate that has the necessary strength to withstand a load applied in the direction in which the hanging fitting is pulled out of the horizontal flange of a shaped steel material such as a channel steel or angle bar, even with a simple shape that requires few processing steps.

The fall-prevention fitting for solving the above problems is a fall-prevention fitting for a hanging fitting, which is configured to prevent the hanging fitting from falling out by inserting the horizontal flange of a shaped steel material, which has a horizontal flange extending from the front of a vertical flange, into an opening in the fitting body and clamping and fixing the hanging fitting from above and below with tightening bolts, and
The device includes a receiving body attached to the hanging hardware, a locking body that locks to the vertical flange of the shaped steel material, and a connecting bolt and a nut that are inserted through the receiving body and the locking body to tighten the bolt,
the engaging body has an engaging piece that engages with the back surface of the vertical flange, and a fixing piece that is bent in a substantially L-shape from the engaging piece and has an end that abuts against an open end of a hanging hardware attached to the horizontal flange,
The locking piece has a through hole at a position where the shaft of the connecting bolt rests on the upper surface of the fixing piece when the connecting bolt is inserted.
Regarding the anti-disengagement fitting, the locking piece may have a protruding piece that abuts against the lower surface of the horizontal flange to prevent rotation.
The fall-prevention fitting may be provided with a support piece that is bent from the end of the fixing piece and abuts against the open end of the hanging fitting.

According to the present invention, a through hole is provided in the locking piece of the locking body that locks to the vertical flange of the shaped steel material at a position where the shank of the connecting bolt rests on the upper surface of the fixed piece when the connecting bolt is inserted through the locking piece, so that when the locking body is placed on the shaped steel material, the connecting bolt can be inserted through the through hole of the locking piece and the shank of the connecting bolt can be placed in contact with the underside of the horizontal flange. Since the head of the connecting bolt has a larger diameter than the shank, by placing it in this manner, the upper side of the head overlaps with the vertical flange via the locking piece and the lower side overlaps with the fixed piece.
Therefore, the load in the direction of removal from the horizontal flange can be borne by the vertical flange. Because the locking piece is hardly subjected to bending stress due to the load, the load borne by the locking piece is extremely small, and the required strength can be significantly reduced. In other words, even if the locking body is made of a simple, approximately L-shaped thin steel plate with little processing, it can efficiently bear the load.
By providing a protruding piece on the locking piece that abuts against the underside of the horizontal flange of the steel section to prevent rotation, the locking body, which attempts to rotate via the connecting bolt when the nut is rotated to tighten, is prevented from rotating together, making installation work easier.
By providing a support piece that bends from the end of the fixed piece and abuts against the open end of the hanging hardware, the abutment surface with the hanging hardware is widened, allowing for stable installation.

1 is a perspective view showing a first embodiment of the present invention. FIG. 2 is an explanatory diagram of the disassembled state of the first embodiment of the present invention. FIG. 2 is a diagram showing the state of use of the channel steel according to the first embodiment of the present invention, as viewed from the side. FIG. 2 is a diagram showing the state of use of the channel steel according to the first embodiment of the present invention, as viewed from the back. FIG. 11 is a perspective view showing a locking body according to a second embodiment of the present invention. FIG. 11 is a perspective view showing a locking body according to a third embodiment of the present invention. FIG. 11 is a diagram showing a state in which the third embodiment of the present invention is used, as viewed from the side of a channel steel. FIG. 11 is a diagram showing the state of use of the third embodiment of the present invention as viewed from the back of a channel steel.

The following describes in detail the embodiments of the anti-falling fitting for a hanging fitting of the present invention, using the drawings. The following description of the preferred embodiment is merely exemplary in nature and is in no way intended to limit the present invention, its applications, or its uses.

The fall prevention fitting for a hanging fitting of the present invention is a fitting for preventing the fall-off of a hanging fitting attached to a shaped steel material. The shaped steel material has a horizontal flange B1 extending horizontally and a vertical flange B2 extending perpendicularly to the horizontal flange B1, and is a steel material in which the horizontal flange B1 extends from the front side of the vertical flange B2. For example, an angle iron or a channel iron can be used as the shaped steel material. The hanging fitting A has an opening on the front side of the main body, into which the horizontal flange B1 of the shaped steel material is inserted and is clamped and fixed from above and below by a tightening bolt A1. In other words, the hanging fitting A and the shaped steel material are connected and fixed with their front sides facing each other inward and their back sides facing outward.

(Embodiment 1)
1 and 2 show embodiment 1. In this embodiment, a channel steel B is used as the shaped steel material, with horizontal flanges B1 extending horizontally from the front side at both the upper and lower ends of a vertical flange B2. The hanging hardware fall-off prevention hardware of embodiment 1 includes a receiving body 50 attached to the hanging hardware A, a locking body 10 that locks onto the vertical flange B2 of the channel steel B, and a connecting bolt 40 and a nut 60 that are inserted through the receiving body 50 and the locking body 10 to tighten the same. The locking body 10 and the receiving body 50 are disposed on either side of the channel steel B and the hanging hardware A so as to sandwich them therebetween, and are connected by the connecting bolt 40.

The locking body 10 is formed by bending a thin steel plate into a generally L-shape to form a locking piece 11 and a fixed piece 12, and the locking piece 11 has a through hole 13. The position of the through hole 13 is at a height where the shaft 42 of the connecting bolt 40 rests on the upper surface of the fixed piece 12 when the connecting bolt 40 is inserted. In this embodiment, the through hole 13 is formed at the end of the locking piece 11, including the bent portion between the locking piece 11 and the fixed piece 12.

50 is a receiving body made of a thin steel plate. The receiving body 50 has a receiving piece 52 with a through hole 51 formed therein, and bent pieces 53, 53 with both ends bent into an approximately L shape. The receiving body 50 is placed in a state of being fitted onto the back surface, which is the side opposite the opening of the hanging hardware A, and the connecting bolt 40 can be inserted through the through hole 51 to tighten the nut 60 from the outside. In this embodiment, the receiving piece 52 faces the locking piece 11 with the hanging hardware A and the channel steel B sandwiched therebetween.

3 and 4 show the state in which the first embodiment is attached to a hanging fitting A.
The hanging bracket A has a horizontal flange B1 of a horizontally extending channel steel B inserted into the opening, and is fixed by clamping from above and below by tightening a tightening bolt A1.
A connecting bolt 40 is inserted into the through hole 13 of the locking body 10, and with the locking piece 11 locked onto the back surface of the vertical flange B2 of the channel steel B, the tip of the connecting bolt 40 is inserted into the through hole 51 of the receiving body 50 arranged on the back surface of the hanging hardware, and a nut 60 is tightened from the outside.
At that time, by pressing the locking body 10 upward so that the shaft 42 of the connecting bolt 40 abuts against the underside of the horizontal flange B1 of the channel steel B, the upper side of the head 41 of the connecting bolt 40 overlaps the vertical flange B2 via the locking piece 11, as shown in the shaded area in Figure 4.
When nut 60 is tightened, the locking body 10 is pulled in the direction of the hanging fitting A, and the locking piece 11 abutting against the vertical flange B2 of the channel steel B and the fixed piece 12 abutting against the end of the opening side of the hanging fitting A become the fulcrum of the reaction force, allowing the hanging fitting A to be stably fixed.

(Embodiment 2)
5 shows a locking body of embodiment 2. The following description of the locking body 20 of embodiment 2, which is different from embodiment 1, will be limited to the locking body 20, and description of the common parts will be omitted. The locking body 20 of embodiment 2 is formed by bending a thin steel plate into a substantially L-shape, as in embodiment 1, to form a locking piece 21 and a fixed piece 22, and a through hole 23 is formed in the locking piece 21 at a height position where the shaft 42 of a connecting bolt 40 is placed on the upper surface of the fixed piece 22.
The locking piece 21 is provided with a protruding piece 24 which protrudes in the extending direction of the fixing piece 22 and has its upper end formed at approximately the same height as the upper end of the through hole 23 (see FIG. 5B).
When the connecting bolt 40 is inserted through the locking body 20 and the receiving body 50 and the nut 60 is rotated to tighten, the rotation causes the locking body 20 to rotate together with the receiving body 50. However, the protruding piece 24 abuts against the underside of the horizontal flange B1 of the channel steel B, thereby preventing the locking body 20 from rotating together with the receiving body 50 and allowing the locking body 20 to be attached horizontally.
In addition, since the upper end of the shaft 42 of the connecting bolt 40 inserted into the through hole 23 and the upper end of the protruding piece 24 are approximately the same height, when the locking body 20 is attached to the channel steel B, the two can be abutted against the underside of the horizontal flange B1 of the channel steel B as a guide for positioning the locking body 20 horizontally relative to the channel steel B.
The protruding piece may be formed by bending the end of the fixing piece so that it protrudes upward, and the upper end of the protruding piece may be formed in a substantially L-shape at a position substantially flush with the upper end of the through hole 13 (not shown).

(Embodiment 3)
Fig. 6 shows a locking body of embodiment 3. The following description of the anti-disengagement fitting for a hanging fitting of embodiment 3 will focus on the locking body 30, which is different from embodiment 2, and will omit a description of the common parts. The locking body 30 of embodiment 3 is formed by bending a thin steel plate into a substantially L-shape, as in embodiment 2, to form a locking piece 31 and a fixed piece 32. A through hole 33 is formed in the locking piece 31 at a height position where the shaft 42 of a connecting bolt 40 is placed on the upper surface of the fixed piece 32, and a protruding piece 24 is provided in the locking piece 31, which protrudes inward and has its upper end formed at a height position substantially the same as the upper end of the through hole 33 (see Fig. 6(b)).
The fixed piece 32 is provided with a support piece 35 formed by bending it so as to extend downward from its end. The support piece 35 can make contact with a wide area of the open end of the hanging hardware A, and together with the locking piece 31 which abuts against the vertical flange B2 of the channel steel B, it can be fixed more stably as a fulcrum for the reaction force.

Figures 7 and 8 show embodiment 3 attached to hanging bracket A. As described in embodiment 1, the opening of hanging bracket A is inserted into the horizontal flange B1 of the horizontally extending channel steel B, and the hanging bracket A is clamped and fixed from above and below by tightening the tightening bolt A1. Then, a connecting bolt 40 is inserted into the through hole 33 of the locking body 30, and with the locking piece 31 abutting the back surface of the vertical flange B2 of the channel steel B, the end of the connecting bolt 40 is inserted into the through hole 51 of the receiving body 50 arranged on the back surface of the hanging bracket, and a nut 60 is tightened from the outside.
At that time, the locking body 30 is pressed upward so that the connecting bolt 40 abuts against the underside of the horizontal flange B1 of the channel steel B, so that the upper side of the head 41 of the connecting bolt 40 overlaps the vertical flange B2 via the locking piece 11, as shown in the shaded area in Figure 8.
When the nut 60 is rotated to tighten, the protruding piece 34 abuts against the underside of the horizontal flange B1 of the channel steel B, preventing it from rotating together with the locking body 30, and allowing the locking body 30 to be attached horizontally.
When nut 60 is tightened, the locking body 30 is pulled in the direction of the hanging fitting A, and the locking piece 31 abutting against the vertical flange B2 of the channel steel B and the support piece 35 abutting against the open end face of the hanging fitting A become the fulcrum of the reaction force, allowing the fitting to be fixed more stably.
A plurality of protrusions 36 protruding outward around the through hole 33 may be formed at positions facing at least two of the six side surfaces of the hexagonal head 41 of the connecting bolt 40. By forming the protrusions 36, when the nut 60 is rotated to tighten, the protrusions 36 come into contact with the head 41 to restrict rotation and prevent the connecting bolt 40 from rotating together, making installation easier and less laborious.
The locking bodies 10, 20, and 30 shown in the first to third embodiments are desirably formed integrally from thin steel plates by pressing.

10, 20, 30 Locking body 11, 21, 31 Locking piece 12, 22, 32 Fixed piece 13, 23, 33 Through hole 24, 34 Projecting piece 35 Support piece 36 Protrusion 40 Connecting bolt 41 Head 42 Shaft 50 Receiving body 51 Through hole 52 Receiving piece 53 Bent piece 60 Nut A Suspension metal fitting A1 Fastening bolt B Channel steel B1 Horizontal flange B2 Vertical flange

Claims (3)

A fall prevention fitting for a hanging fitting is provided for preventing the hanging fitting from falling out, the horizontal flange of which of a shaped steel member extending from the front of a vertical flange is inserted into an opening in a fitting body, and the hanging fitting is clamped and fixed from above and below by tightening bolts,
The device includes a receiving body attached to the hanging hardware, a locking body that locks to the vertical flange of the shaped steel material, and a connecting bolt and a nut that are inserted through the receiving body and the locking body to tighten the bolt,
the engaging body has an engaging piece that engages with the back surface of the vertical flange, and a fixing piece that is bent in a substantially L-shape from the engaging piece and has an end that abuts against an open end of a hanging hardware attached to the horizontal flange,
A fall prevention fitting for a hanging fitting, characterized in that the locking piece has a through hole at a position where the shaft portion of the connecting bolt is placed on the upper surface of the fixing piece when the connecting bolt is inserted. The hanging hardware fall prevention fitting according to claim 1, characterized in that the locking piece has a protruding piece that abuts against the underside of the horizontal flange to prevent rotation. 3. The fall-off prevention fitting for a hanging hardware according to claim 1 or 2, characterized in that a support piece is provided which is bent from an end of the fixing piece and comes into contact with the open end of the hanging hardware.