Channel steel anti-drop fitting

Abstract

To prevent fall of a channel steel when a fixing bolt of a sandwiching bracket is loosened to cause the channel steel to take a moving attitude in a fall direction.SOLUTION: A channel steel fall prevention bracket prevents fall of a channel steel A when the channel steel A and a flange C1 are sandwiched by a sandwiching bracket B in a state that the channel steel A is placed in contact with a horizontal surface of the flange C1 of an H-shaped steel and fixed by fastening a fixing bolt B1. The channel steel fall prevention bracket includes: a restriction part 11 which contacts with the sandwiching bracket B when the channel steel A takes a moving attitude in a fall direction; and a fixing part 12 which extends from the restriction part and is fixed to the channel steel.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a fall prevention fitting for preventing the fall of a long channel steel when attaching the channel steel to the flange of a beam made of H-shaped steel or the flange between beams by a clamping fitting in order to support equipment materials such as pipes at a predetermined position in the equipment construction of a building.

Background Art

[0002] As shown in FIGS. 16 and 17, the clamping fitting is composed of a support portion B2 to which a fixing bolt B1 is screwed so as to be able to advance and retreat and a holding portion having an opening B3 through which a channel steel or a lip channel steel is inserted. With the channel steel in contact with the flange of the H-shaped steel, a pair of the 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 to the support portion is tightened to clamp and fix both the flange of the H-shaped steel and the channel steel. Or, as shown in FIG. 18, when the opening of the channel steel is used upward, it is composed of a support portion B2 to which a fixing bolt B1 is screwed so as to be able to advance and retreat and a holding portion having a latching portion B4 that latches onto the edge of an opening extending in the longitudinal direction of the channel steel. With the channel steel in contact with the flange of the H-shaped steel, a pair of the clamping fittings are latched onto the edge of the opening with the latching portions so as to face each other from both sides of the channel steel, and the fixing bolt screwed to the support portion is tightened to clamp and fix both the flange of the H-shaped steel and the channel steel.

[0003] Also, as shown in Patent Documents 1, 2, and 3, as a fitting for attaching a channel steel to the flange of an H-shaped steel, there is a clamping fitting that sandwiches and fixes both the H-shaped steel and the channel steel by tightening a fixing bolt with the channel steel in contact with the flange of the H-shaped steel. Those fittings have screw holes, and a method of driving screws into the channel steel from the screw holes to fix it more strongly is disclosed.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, the clamping fitting B as shown in FIGS. 16 to 18 does not have a dropout prevention fitting for preventing the dropout of a long member such as a channel steel. Further, in Patent Documents 1 and 2, since the main body of the clamping fitting has a bisected hole and is of an integral shape, the types of channel steels to be attached are limited, and there is no versatility and lack of convenience. In Patent Document 3, it is necessary to perform the construction of driving a screw before attaching the channel steel to the flange with the clamping fitting, and since post-construction cannot be performed, the construction time is limited, and there is a problem that it hinders the setup of the work.

[0006] The present invention has been made in view of the above-described conventional problems, and when attaching a long channel steel that supports equipment materials such as piping to the flange of an H-shaped steel, even 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, an object is to provide a dropout prevention fitting for preventing the dropout of the channel steel.

Means for Solving the Problems

[0007] The dropout prevention fitting for solving the above problems is a channel steel dropout prevention fitting for preventing the dropout of the channel steel when clamping and fixing the flange and the channel steel with a clamping fitting in a state where the channel steel that supports equipment materials such as piping is in contact with the horizontal plane of the flange of a beam made of H-shaped steel, and is characterized by including a restricting portion that contacts the clamping fitting when the channel steel is in a moving posture in the dropout direction, and a fixing portion that extends from the restricting portion and is fixed to the channel steel.

[0008] Regarding the dropout prevention fitting, a screw hole portion may be provided in the fixing portion.

[0009] Regarding the anti-drop fitting, a locking portion that locks to the clamping fitting may be provided on the regulating portion.

Advantages of the Invention

[0010] According to the present invention, when a large horizontal force is applied during an earthquake, or when the fixing bolts of the clamping fitting become loose due to repeated vibrations or the like, when the channel steel assumes a moving posture in the dropping direction, the channel steel is fixed by the fixing portion, and the clamping fitting abuts against the regulating portion extending from the fixing portion to regulate the movement in the dropping direction, thereby preventing dropping. Moreover, since it is a separate body from the clamping fitting and can be directly fixed to the channel steel, it can be installed even after the installation of the clamping fitting, and because it is a means of regulating movement by abutting against the outer surface of the clamping fitting, it can be used in combination with various types of clamping fittings without being limited to the form of the clamping fitting, so its versatility is also increased.

Brief Description of the Drawings

[0011]

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Mode for Carrying Out the Invention

[0012] Embodiments of the anti-drop fitting of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiments is merely illustrative in nature and is not intended to limit the present invention, its applications, or its uses in any way. The anti-drop fitting of the present invention is an anti-drop fitting for groove-shaped steel that prevents the groove-shaped steel supporting equipment materials such as pipes from falling off when the groove-shaped steel is brought into contact with the horizontal plane of the flange of a beam made of H-shaped steel, the groove-shaped steel and the flange are overlapped, and the flange and the groove-shaped steel are clamped by a clamping fitting fixed by tightening a fixing bolt. This anti-drop fitting includes fitting bodies 10, 20, 30, 40, 50 and screws for fixing these to the groove-shaped steel A. The fitting bodies 10, 20, 30, 40, 50 are fittings separate from the clamping fitting.

[0013] (Embodiment 1) Figures 1 to 2 show Embodiment 1. The fitting body 10 includes a restricting portion 11 made of a thin steel plate, and a fixing portion 12 that bends the side surface of the restricting portion 11 and extends downward. A plurality of screw holes 13 are formed in the fixing portion 12.

[0014] In FIG. 2, the upper surface of the channel steel A having an opening facing downward is brought into contact with the lower surface of the flange C1 of the H-shaped steel, and the channel steel A and the flange C1 are overlapped vertically. Further, with the channel steel A inserted into the opening B3 of the clamping fitting B, the channel steel A and the flange C1 are clamped and fixed by the clamping fitting B. When attaching the anti-drop fitting of the present embodiment to the channel steel A in such a state, the restricting portion 11 faces the outer peripheral surface extending in the overlapping direction of the channel steel A and the flange C1 of the clamping fitting B, and is arranged in a state of standing upright on the upper surface A1 of the channel steel A. The fixing portion 12 that bends away from the restricting portion 11 and extends downward from the upper surface A1 is brought into contact with 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 holes 13. In the present embodiment, the overlapping direction is the vertical direction in FIG. 2.

[0015] (Embodiment 2) Figures 3 to 4 show Embodiment 2. Only the parts different from the above Embodiment 1 will be described, and the description of the common parts will be omitted. The fitting body 20 bends from the upper end of the restricting portion 21 in the horizontal direction and away from the fixing portion 22 to form a connecting portion 24, and a through hole 25 is formed in the connecting portion 24 to serve as a locking portion 26.

[0016] Furthermore, the tip of the connecting portion 24 can be bent downward to form a hooking portion 27. The hooking portion 27 can be hooked on the end of the clamping fitting B.

[0017] When attaching the anti-drop fitting of this embodiment to the channel steel A, while inserting the fixing bolt B1 of the clamping fitting B through the through-hole 25 of the connecting portion 24, the latching portion 27 is placed in a state of being latched to the tip of the support portion B2 of the clamping fitting B. In this way, the restricting portion 21 stands upright on the upper surface A1 of the channel steel A, and the fixing portion 22 can be fixed to the channel steel A by screwing through the hole portion 23 in a state of being in contact with the side surface A2. Also, in advance, by inserting the through-hole 25 of the locking portion 26 through the fixing bolt in the clamping fitting B to make a pre-assembly, the fittings can be aggregated, so it does not become complicated during carrying and work.

[0018] (Embodiment 3) Figs. 5 to 6 show Embodiment 3. The fitting body 30 is a fixing portion 32 formed by bending a restricting portion 31 made of a thin steel plate and extending it in a substantially L shape. A hole portion 33 for screwing is formed in the fixing portion 32. When attaching the anti-drop fitting of this embodiment 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 portion of the fixing portion 32 on the side close to the clamping fitting B. The restricting portion 31 faces the outer peripheral surface extending in the overlapping direction of the channel steel A and the flange C1 of the clamping fitting B, and stands upright on the upper surface A1 of the channel steel A. The fixing portion 32 can be fixed to the channel steel A by screwing through the hole portion 33.

[0019] (Embodiment 4) Figs. 7 to 8 show Embodiment 4. Only the parts different from Embodiment 3 above will be described, and the description of the common parts will be omitted. The fitting body 40 forms a connecting portion 44 by bending horizontally from the upper end of the restricting portion 41, and further bends the tip downward to form a latching portion 47. A through-hole 45 is formed in the connecting portion 44. When attaching to the channel steel A, while inserting the fixing bolt B1 of the clamping fitting B through the through-hole 45 of the connecting portion 44, the latching portion 47 is installed in a state of being latched to the tip of the support portion B2 of the clamping fitting B. In this way, the restricting portion 41 stands upright 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 in a state of being in contact with the upper surface A1.

[0020] It is desirable that the fitting bodies 10, 20, 30, 40 shown in the above Embodiments 1 to 4 are integrally formed by pressing.

[0021] (Embodiment 5) FIG. 9 shows Embodiment 5, which is a form in which the fixing methods of the above Embodiments 3 and 4 are changed. A through hole 53 is provided in the fixing portion 52 of the fitting body 50. When the opening A3 of the channel steel A faces upward, a plate-shaped nut 54 is locked to the opening edge A4 of the opening A3, and the connecting bolt 55 is tightened and clamped to fix it.

[0022] Next, the usage method of the anti-drop fitting of the present invention will be described according to Embodiment 2.

[0023] FIGS. 10 to 11 show the case where a clamping fitting of the type (see FIG. 16) in which the channel steel is inserted through the opening of the clamping fitting and fixed is used. With the opening A3 of the channel steel A facing downward and the upper surface A1 in contact with the lower surface of the H-shaped steel C, the opening B3 of the clamping fitting B is inserted into one end of the channel steel A, and the fixing bolt B1 is tightened and fixed through one flange C1 of the H-shaped steel C. Similarly, the other end is fixed by another clamping fitting B.

[0024] Next, the anti-drop fitting of the present invention is attached. While inserting the through hole 25 of the connecting portion 24 of the fitting body 20 through the fixing bolt B1 of the clamping fitting B, it is installed in a state where the latching portion 27 is latched to the tip of the support portion B2 of the clamping fitting B. Thus, the restricting portion 21 stands on the upper surface A1 of the channel steel A, and the fixing portion 22 is fixed to the channel steel A by screwing through the hole portion 23 while being in contact with the side surface A2.

[0025] When the fixing bolt B1 becomes loose, conventionally, the channel steel A may tilt together with the clamping fitting B and the channel steel A may fall off. However, if the anti-drop fitting of the present invention is attached, when the fixing bolt B1 becomes loose and the channel steel A assumes a moving posture in the dropping direction, the restricting portion 21 abuts against the outer surface of the clamping fitting B to prevent the channel steel A from dropping. The movement in the dropping direction refers to, for example, the channel steel A tilting in the vertical direction and moving in the longitudinal direction. By restricting the angle and position of the clamping fitting B by the restricting portion 11, such movement and dropping of the channel steel A can be prevented.

[0026] Figs. 12 to 13 show the case where a clamping fitting of the type in which a horizontally oriented lip groove-shaped steel is inserted into and fixed to the opening of the clamping fitting (see Fig. 17) is used. With the side surface A2 of the lip groove-shaped steel in contact with the lower surface of the H-shaped steel C, the opening B3 of the clamping fitting B is inserted into one end of the lip groove-shaped steel A, and the fixing bolt B1 is tightened and fixed through one flange C1 of the H-shaped steel C. Similarly, the other end is fixed by another clamping fitting B.

[0027] Next, the anti-drop fitting of the present invention is attached. While inserting the fixing bolt B1 of the clamping fitting B through the through-hole 25 of the connecting portion 24 of the fitting body 20, the hooking portion 27 is hooked on the tip of the supporting portion B2 of the clamping fitting B and installed. In this way, the restricting portion 21 stands on the side surface A2 of the lip groove-shaped steel A, and the fixing portion 22 is fixed to the lip groove-shaped steel A by screwing through the hole portion 23 while being in contact with the opening edge A4.

[0028] Figs. 14 to 15 show the case where a clamping fitting of the type in which the hooking portion B4 of the clamping fitting is hooked on the opening edge A4 of the groove-shaped steel and fixed (see Fig. 18) is used. With the opening A3 of the groove-shaped steel facing upward and the opening in contact with the lower surface of the H-shaped steel C, the hooking portion B4 of the clamping fitting B is hooked on the opening edge A4 at one end of the groove-shaped steel A, and the fixing bolt B1 is tightened and fixed through one flange C1 of the H-shaped steel C. Similarly, the other end is fixed by another clamping fitting B.

[0029] Next, the anti-drop fitting of the present invention is attached. While inserting the fixing bolt B1 of the clamping fitting B through the through-hole 25 of the connecting portion 24 of the fitting body 20, the hooking portion 27 is hooked on the tip of the supporting portion B2 of the clamping fitting B and installed. In this way, the restricting portion 21 stands in the opening A3 of the groove-shaped steel A, and the fixing portion 22 is fixed to the groove-shaped steel A by screwing through the hole portion 23 while being in contact with the side surface A2.

Explanation of Reference Numerals

[0030] 10, 20, 30, 40, 50 Fitting body 11, 21, 31, 41, 51 Restricting portion 12, 22, 32, 42, 52 Fixing portion 13, 23, 33, 43 Hole portion 24, 44 Connection part 25, 45 Through hole 26, 46 Locking part 27, 47 Hooking part 53 Through hole 54 Nut 55 Connecting bolt A Grooved steel, lip grooved steel A1 Upper surface A2 Side surface A3 Opening A4 Opening edge B Clamping fitting B1 Fixed bolt B2 Support part B3 Opening part B4 Hooking part C H-shaped steel C1 Flange

Claims

1. A channel steel drop prevention fitting for preventing the channel steel from dropping off when clamping the flange and the channel steel with a clamping fitting and fixing them by tightening a fixing bolt with the channel steel in contact with the horizontal plane of the flange of the H-shaped steel. The channel steel drop prevention fitting includes a restricting portion that contacts the clamping fitting when the channel steel is in a moving posture in the dropping-off direction, and a fixing portion that extends from the restricting portion and is fixed to the channel steel.

2. The channel steel drop prevention fitting according to claim 1, wherein a hole portion for screwing is provided in the fixing portion.

3. The channel steel drop prevention fitting according to any one of claims 1 to 2, wherein a locking portion for locking the clamping fitting is provided in the restricting portion.

4. The channel steel drop prevention fitting according to claim 1, wherein the restricting portion faces an outer peripheral surface extending in the overlapping direction of the channel steel and the flange of the clamping fitting, and the fixing portion extends from the restricting portion by bending and faces the outer peripheral surface of the channel steel.

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