JP7699762B2 - Channel steel fall prevention fittings - Google Patents

Description

The present invention relates to a fall prevention fitting that prevents a long channel steel from falling off when it is placed across the flanges of a beam made of H-shaped steel or between beams and attached to the flanges with clamping fittings to support equipment materials such as piping at a specified position during facility construction work on a structure.

As shown in Figures 16 and 17, the clamping fitting is composed of a support part B2 to which a fixing bolt B1 is screwed so as to be movable back and forth, and a holding part having an opening B3 through which a channel steel or lip channel steel is inserted. With the channel steel abutting against the flange of the H-shaped steel, a pair of clamping fittings are inserted into the openings so as to face each other from both sides of the channel steel, and the fixing bolt screwed into the support part is tightened to clamp and fix both the flange of the H-shaped steel and the channel steel. As shown in Figure 18, When using the opening of the channel steel facing upward, it is composed of a support part B2 to which a fixing bolt B1 is screwed so that it can be advanced and retreated, and a holding part having a hook part B4 that hooks onto the edge of the opening extending in the longitudinal direction of the channel steel, and when the pair of clamping fittings are in contact with the flange of the H-shaped steel and facing each other from both sides of the channel steel, the hook parts are hooked onto the edge of the opening, respectively, and the fixing bolt screwed into the support part is tightened to clamp and fix both the flange of the H-shaped steel and the channel steel.

As shown in Patent Documents 1, 2 and 3, conventional metal fittings for attaching channel steel to the flange of H-shaped steel include clamping metal fittings that clamp and fix the H-shaped steel and channel steel by tightening fixing bolts while the channel steel is in contact with the flange of the H-shaped steel. These metal fittings have screw holes, and a method has been disclosed in which screws are driven into the channel steel through the screw holes to secure it more firmly.

JP 2005-325633 A JP 2019-19649 A JP 2021-195752 A

However, the clamping fitting B as shown in Figures 16 to 18 does not include a fall prevention fitting for preventing long materials such as channel steel from falling off. Also, in Patent Documents 1 and 2, the clamping fitting has an integrated shape with screw holes in the main body, so the types of channel steel that can be attached are limited, making it less versatile and less convenient. In Patent Document 3, the screws must be driven before attaching the channel steel to the flange with the clamping fitting, and post-installation is not possible, limiting the time for installation and causing problems with work arrangements.

The present invention has been made in consideration of the above-mentioned problems with the conventional technology, and aims to provide a fall prevention fitting that prevents a long channel steel supporting equipment such as piping from falling off when the channel steel is attached to an H-beam flange even if a large horizontal force is applied during an earthquake or if the fixing bolt of the clamping fitting becomes loose due to repeated vibrations, etc.

The fall prevention fitting to solve the above problem is a channel steel fall prevention fitting that prevents the channel steel supporting equipment such as piping from falling off when the flange and the channel steel are clamped by a clamping fitting and fixed by tightening a fixing bolt while the channel steel is in a state where the flange and the channel steel supporting equipment such as piping are abutted against the horizontal surface of the flange of a beam made of H-shaped steel, and the gist is that it is equipped with a restricting part that abuts against the clamping fitting when the channel steel moves in a position in the direction in which it will fall off, and a fixing part that extends from the restricting part and is fixed to the channel steel.

The fixing part of the fall-prevention fitting may be provided with a screw hole.

The anti-fall metal fitting may have a locking portion on the restricting portion that locks onto the clamping metal fitting.

According to the present invention, when a large horizontal force is applied during an earthquake or when the fixing bolt of the clamping fitting loosens due to repeated vibrations or the like, causing the channel steel to move in a position that would cause it to fall off, the channel steel is fixed by the fixing part, and the clamping fitting abuts against a regulating part extended from the fixing part to regulate the movement in the direction of falling off, thereby preventing the channel steel from falling off. Moreover, since it is separate from the clamping fitting and can be fixed directly to the channel steel, it can be installed as a post-installation work even after the clamping fitting is installed, and since the means for regulating movement by abutting against the outer surface of the clamping fitting is used, it is not limited to the shape of the clamping fitting and can be used with many types of clamping fittings, making it highly versatile.

1 is a perspective view showing a first embodiment of the present invention. FIG. 2 is a perspective view showing an installation state of the first embodiment of the present invention. FIG. 11 is a perspective view showing a second embodiment of the present invention. FIG. 11 is a perspective view showing an installation state of the second embodiment of the present invention. FIG. 11 is a perspective view showing a third embodiment of the present invention. FIG. 11 is a perspective view showing an installation state of a third embodiment of the present invention. FIG. 11 is a perspective view showing a fourth embodiment of the present invention. FIG. 11 is a perspective view showing an installation state of a fourth embodiment of the present invention. FIG. 13 is a perspective view showing a fifth embodiment of the present invention. FIG. 11 is an oblique view showing a second embodiment of the present invention and a clamping fixture of a type in which a channel steel is inserted into an opening of the clamping fixture to fix it. FIG. 11 is a side view showing a second embodiment of the present invention and a clamping fixture of a type in which a channel steel is inserted into an opening of the clamping fixture to secure it. FIG. 11 is an oblique view showing a second embodiment of the present invention and a clamping fixture of a type in which a lip channel steel is inserted into an opening of the clamping fixture to fix it in place. FIG. 11 is a side view showing a second embodiment of the present invention and a clamping fixture of a type in which a lip channel steel is inserted into an opening of the clamping fixture to secure it in place. FIG. 11 is an oblique view showing a second embodiment of the present invention and a case where a clamping fixture of a type is used in which a fastening portion of the clamping fixture is engaged with the opening edge of a channel steel to be fixed. FIG. 11 is a side view showing a second embodiment of the present invention and a clamping fixture of a type that engages and fixes the clamping fixture by engaging the hooking portion with the opening edge of the channel steel. FIG. 2 is a perspective view showing a clamping fixture of a type in which a channel steel is inserted into an opening of the clamping fixture to secure it. FIG. 2 is a perspective view showing a clamping fixture of a type in which a lip channel steel is inserted into an opening of the clamping fixture to secure it. 1 is a perspective view showing a clamping fixture of a type in which a fastening portion of the clamping fixture is engaged with the opening edge of a channel steel to be fixed.

The embodiment of the fall prevention fitting of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiment is essentially merely illustrative and is in no way intended to limit the present invention, its applications, or its uses. The fall prevention fitting of the present invention is a fall prevention fitting for a channel steel that prevents the channel steel from falling off when the channel steel supporting equipment such as piping is abutted against the horizontal surface of the flange of a beam made of H-shaped steel, the channel steel and the flange are overlapped, and the flange and the channel steel are fixed by a clamping fitting that clamps them by tightening a fixing bolt. This fall prevention fitting includes a fitting body 10, 20, 30, 40, 50 and a screw that fixes it to the channel steel A. The fitting body 10, 20, 30, 40, 50 is a fitting separate from the clamping fitting.

(Embodiment 1)
1 and 2 show a first embodiment, in which a metal fitting body 10 includes a restricting portion 11 made of a thin steel plate and a fixing portion 12 that is bent on the side of the restricting portion 11 and extends downward. A plurality of holes 13 for fastening with screws are formed in the fixing portion 12.

In FIG. 2, the upper surface of the channel steel A, which has an opening facing downward, is abutted against the lower surface of the flange C1 of the H-shaped steel, and the channel steel A and the flange C1 are stacked vertically. In addition, the channel steel A is inserted into the opening B3 of the clamping fitting B, and the channel steel A and the flange C1 are clamped and fixed by the clamping fitting B. When attaching the fall-off prevention fitting of this embodiment to the channel steel A in such a state, the clamping fitting B is arranged in an upright state on the upper surface A1 of the channel steel A so that the regulating part 11 faces the outer peripheral surface of the clamping fitting B extending in the overlapping direction of the channel steel A and the flange C1, and the fixing part 12, which bends from the regulating part 11 and extends in a direction away from the clamping fitting B and downward from the upper surface A1, is abutted against the side surface A2, which is the outer peripheral surface of the channel steel A. In this state, the fitting body 10 can be fixed to the channel steel A by screwing through the hole portion 13. In this embodiment, the overlapping direction is the up-down direction in FIG. 2.

(Embodiment 2)
3 and 4 show embodiment 2, and only the parts that are different from embodiment 1 will be described, and the description of the common parts will be omitted. The metal fitting body 20 is bent from the upper end of the restricting portion 21 in the horizontal direction and in the direction away from the fixed portion 22 to form a connecting portion 24, and a through hole 25 is formed in the connecting portion 24 to form a locking portion 26.

The tip of the connecting portion 24 can also be bent downward to form a hook portion 27. The hook portion 27 can be hooked to the end of the clamping metal fitting B.

When attaching the fall prevention fitting of this embodiment to the channel steel A, the fixing bolt B1 of the clamping fitting B is inserted through the through hole 25 of the connecting part 24 while the hook part 27 is hooked to the tip of the support part B2 of the clamping fitting B, so that the restricting part 21 stands upright on the upper surface A1 of the channel steel A, and the fixing part 22 can be fixed to the channel steel A by screwing it through the hole part 23 with the fixing part 22 abutting the side surface A2. Also, by inserting the through hole 25 of the hook part 26 of the clamping fitting B into the fixing bolt in advance and pre-assembling it, the fittings can be consolidated, making it less cumbersome to carry or use.

(Embodiment 3)
5 and 6 show a third embodiment, in which the metal fitting body 30 has a fixing portion 32 formed by bending a restricting portion 31 made of a thin steel plate and extending it into a generally L-shape, and a hole 33 for screw fastening is formed in the fixing portion 32. When the fall-off prevention metal fitting of this embodiment is attached to the channel steel A, the fixing portion 32 abuts against the upper surface A1 of the channel steel A. The restricting portion 31 extends upward from the end of the fixing portion 32 on the side close to the clamping metal fitting B. The restricting portion 31 faces the outer peripheral surface of the clamping metal fitting B extending in the overlapping direction of the channel steel A and the flange C1, and is erected on the upper surface A1 of the channel steel A, and the fixing portion 32 can be fixed to the channel steel A by fastening it with a screw via the hole 33.

(Embodiment 4)
7 and 8 show the fourth embodiment, and only the parts different from the third embodiment are described, and the description of the common parts is omitted. The metal fitting body 40 is bent horizontally from the upper end of the restricting portion 41 to form the connecting portion 44, and the tip is further bent downward to form the hook portion 47, and a through hole 45 is formed in the connecting portion 44. When attaching to the channel steel A, the hook portion 47 is hooked to the tip of the support portion B2 of the clamping metal fitting B while the fixing bolt B1 of the clamping metal fitting B is inserted into the through hole 45 of the connecting portion 44, so that the restricting portion 41 is erected on the upper surface A1 of the channel steel A, and the fixing portion 42 can be fixed by screwing through the hole portion 43 while abutting against the upper surface A1.

It is preferable that the metal fitting bodies 10, 20, 30, and 40 shown in the above embodiments 1 to 4 are integrally formed by pressing.

(Embodiment 5)
FIG. 9 shows a fifth embodiment, which is a modified version of the fixing method of the third and fourth embodiments, in which a through hole 53 is provided in a fixing portion 52 of a metal fitting body 50, and when an opening A3 of the channel steel A faces upward, a plate-shaped nut 54 is engaged with an opening edge A4 of the opening A3, and a connecting bolt 55 is tightened to clamp the opening.

Next, we will explain how to use the anti-fallout fitting of the present invention using embodiment 2.

Figures 10-11 show the case where a clamping fixture of the type that secures the channel steel by inserting it into the opening of the clamping fixture (see Figure 16) is used. With the opening A3 of the channel steel A facing downwards and the upper surface A1 abutting the lower surface of the H-shaped steel C, the opening B3 of the clamping fixture B is inserted into one end of the channel steel A, and the fixture is fixed by tightening the fixing bolt B1 via one flange C1 of the H-shaped steel C, and the other end is similarly fixed by another clamping fixture B.

Next, the fall-prevention fitting of the present invention is attached by inserting the fixing bolt B1 of the clamping fitting B through the through hole 25 of the connecting part 24 of the fitting body 20, while the hook part 27 is hooked onto the tip of the support part B2 of the clamping fitting B. This causes the restricting part 21 to stand on the top surface A1 of the channel steel A, and the fixing part 22 to abut against the side surface A2 and is fixed to the channel steel A by screwing it through the hole part 23.

Conventionally, if the fixing bolt B1 loosens, the channel steel A may tilt together with the clamping bracket B, causing the channel steel A to fall off. However, if the fall-prevention bracket of the present invention is installed, when the fixing bolt B1 loosens and the channel steel A moves in a position that would cause it to fall off, the regulating part 21 comes into contact with the outer surface of the clamping bracket B, preventing the channel steel A from falling off. Movement in the direction that it would fall off refers, for example, to the channel steel A tilting up and down and moving in the longitudinal direction. The regulating part 11 regulates the angle and position of the clamping bracket B, preventing such movement and falling off of the channel steel A.

Figures 12-13 show the case where a clamping fixture of the type (see Figure 17) is used in which a lip channel steel is inserted horizontally into the opening of the clamping fixture to secure it in place. With the side surface A2 of the lip channel steel abutting against the underside of the H-shaped steel C, the opening B3 of the clamping fixture B is inserted into one end of the lip channel steel A, and the fixture is fixed by tightening the fixing bolt B1 via one flange C1 of the H-shaped steel C, and the other end is similarly fixed by another clamping fixture B.

Next, the fall-prevention fitting of the present invention is attached by inserting the fixing bolt B1 of the clamping fitting B through the through hole 25 of the connecting part 24 of the fitting body 20, and installing the hook part 27 hooked to the tip of the support part B2 of the clamping fitting B, so that the restricting part 21 stands upright on the side A2 of the lip channel steel A, and the fixing part 22 is fixed to the lip channel steel A by screwing it through the hole part 23 while abutting against the opening edge A4.

Figures 14-15 show the case where a clamping fixture of the type that hooks the clamping fixture's hook portion B4 onto the opening edge A4 of the channel steel (see Figure 18) is used. The opening A3 of the channel steel A is faced upward, the opening is abutted against the underside of the H-shaped steel C, and the hook portion B4 of the clamping fixture B is hooked onto one end of the channel steel A at the opening edge A4. The clamping fixture is then fixed by tightening a fixing bolt B1 via one flange C1 of the H-shaped steel C, and the other end is similarly fixed by another clamping fixture B.

Next, the fall-prevention fitting of the present invention is attached by inserting the fixing bolt B1 of the clamping fitting B through the through hole 25 of the connecting part 24 of the fitting body 20, and installing the hook part 27 hooked to the tip of the support part B2 of the clamping fitting B, so that the restricting part 21 stands upright in the opening A3 of the channel steel A, and the fixing part 22 is fixed to the channel steel A by screwing it through the hole part 23 while abutting against the side surface A2.

10, 20, 30, 40, 50 Metal fitting body 11, 21, 31, 41, 51 Regulating portion 12, 22, 32, 42, 52 Fixing portion 13, 23, 33, 43 Hole portion 24, 44 Connecting portion 25, 45 Through hole 26, 46 Locking portion 27, 47 Hooking portion 53 Through hole 54 Nut 55 Connecting bolt A Channel steel, lip channel steel A1 Top surface A2 Side surface A3 Opening A4 Opening edge B Clamping metal fitting B1 Fixing bolt B2 Support portion B3 Opening B4 Hooking portion C H-shaped steel C1 Flange

Claims (4)

A channel steel fall prevention fitting that prevents the channel steel from falling off when the channel steel is in contact with the horizontal surface of the flange of the H-shaped steel and the flange and the channel steel are clamped by a clamping fitting and fixed by tightening a fixing bolt, and is equipped with a restricting part that abuts against the clamping fitting when the channel steel moves in a position in the direction of falling off, and a fixing part that extends from the restricting part and is fixed to the channel steel. The channel steel fall prevention fitting according to claim 1, in which the fixing portion is provided with a screw fastening hole. A channel steel fall prevention fitting according to any one of claims 1 to 2, in which the restricting portion is provided with a locking portion that locks onto the clamping fitting. The channel steel fall prevention fitting described in claim 1, characterized in that the restricting portion faces the outer peripheral surface of the clamping fitting that extends in the overlapping direction of the channel steel and the flange, and the fixing portion bends and extends from the restricting portion to face the outer peripheral surface of the channel steel.