JPH0651403U - Hook type safety clamp - Google Patents

Abstract

(57) [Summary] [Problem] To provide a hook-type safety clamp capable of securely joint-joining intersecting portions of intersecting pipes, having a simple structure, easy to handle, and inexpensive to implement. [Structure] U-shaped frame body 2 that is pinched on the outer circumference of the pipe
And a hook 3 supported by a cantilever pin on the open end side of the frame body 2.
And a hook 3 having a rotatable structure, which is screwed to the frame body 2, is engaged with the outer periphery of the pipe to safely jointly join pipes intersecting at various angles with each other.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a hook-type safety clamp used in a pipe support and pipe or a pipe crossing portion such as a pipe or pipe cross bracing portion in formwork support work.

[0002]

[Prior art]

 As shown in FIG. 5, in the frame support work, the single pipe (pipe) standing on the floor plate 18, the pipe support 19 and the like are reinforced by the diagonal braces 15. The single pipe 14 and the pipe support 19 and the like and the braces 15 intersect with each other. The bracing part 16 (indicated by a circle with a chain double-dashed line) has a fixed type such as an orthogonal clamp or a root clamp for its joint. Clamps were previously used. As shown in FIGS. 6 to 7, the root clamp 20 has a U-shaped frame body 22 having a concave portion 21 for engaging the single pipe 14 and the like, and a pressing tool 23 screwed to the base portion side of the frame body 22 and the like. Composed of. Further, the orthogonal cramp (not shown) is a U-shaped frame with a hook fixed to a single pipe or the like fixed to the open end of the frame, and has substantially the same shape as the root clamp 20 shown in FIG. It is formed. FIG. 7 shows a state in which the single pipes 14 and 24 (FIG. 5) orthogonal to each other are jointly connected by the root clamp 20. That is, the recess 21 of the frame body 22 of the root clamp 20 is engaged with one single tube 24, and the pressing tool 23 is press-engaged with the other single tube 14, whereby the two pipes 14 and 24 are jointly connected. To be done.

[0003]

[Purpose of the invention: Problems to be solved by the invention]

 The orthogonal clamp or the root clamp 20 is effective for a joint at the intersection of the single pipes 14 and 24 that directly intersect each other as shown in FIG. However, it cannot be used as a joint at a portion where the single pipe 14 and the pipe support 19 and the braces 15 obliquely intersect, like the bracing braces 16 shown in FIG. On the other hand, many of the accidents involved in formwork support are due to insufficient strength, and the cause is often due to insufficient joint strength at the joint between pipes. For this reason, in the past, a freely rotatable clamp (not shown) was used for the cross bracing part 16, but since the universal clamp has a complicated structure, is troublesome to handle, and is expensive, it is not used. Often not used. Therefore, there was a problem that a trouble occasionally occurred due to insufficient strength in formwork support.

The present invention solves the above-mentioned problems, and is suitable as a joint for a crossing portion such as a cross bracing portion, and has a hook structure that is simple in structure, easy to handle, and inexpensive to implement. The purpose is to provide a safety clamp.

[0005]

[Constitution of the present invention: means for solving problems]

 In order to achieve the above object, the present invention is a clamp for fixing an intersecting portion of intersecting pipes, which is a U-shaped frame body that can be clamped on the outer periphery of the pipe, and an opening of the frame body. The base side is detachably supported on the end side by a cantilever pin, and a pair of hooks are formed on the tip side of which an arc-shaped portion that can be attached to the outer periphery of the pipe is formed, and a screw on the base side of the frame body. A hook-type safety clamp is provided which has a screw shaft to be attached and which is provided with a pressing tool for fixing an abutting portion abutting on the pipe outer periphery to the end of the screw shaft. Further, specifically, the present invention is characterized by a hook type safety clamp in which the hook is pin-coupled to a frame body and is rotatable about its axis so as to have a function as a universal clamp.

[0006]

[Action]

 Since the hook is supported by a cantilevered pin on the frame, the hook is rotatable around the pin. Therefore, it can be attached to an oblique pipe or the like at the intersection. Therefore, by pressing the pressing tool toward the pipe side, the intersecting pipes can be securely jointed. Further, by making the hook itself, which is pin-connected to the frame body, rotatable about its axis, the pipe at the intersection can be connected more reliably and safely.

[0007]

Embodiment An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the entire structure of the present embodiment, FIG. 2 is a partial sectional view showing the detailed structure thereof, and FIG. 3 is a perspective view showing a method of clamping the brachial paddle according to the present embodiment. FIG. 4 is a partial cross-sectional view for explaining the main part of another embodiment of the present invention.

As shown in FIG. 1, the hook type safety clamp 1 includes a frame body 2, a pair of hooks 3 and a pressing tool 4.

The frame 2 is composed of a U-shaped plate member formed by integrally bending side plates 6 and 6 projecting from the base portion 5 and both ends thereof, and an open portion 7 at the tip thereof is a single pipe 14 (see FIG. It is formed in a width dimension that can be sandwiched in 5).

The hook 3 is made of a plate material having an arcuate portion 8 that can be attached to the outer periphery of the braces 15 (FIG. 5), and its proximal end side is a side plate of the frame body 2 by a pin 9 as shown in detail in FIG. Pinned to 6. That is, the hook 3 is supported on the frame body 2 by a cantilever pin. The pin 9 is prevented from coming off by the split pin 10 as shown in FIG. With the above structure, the hook 3 is rotatable around the pin 9, and by pulling out the split pin 10 and the pin 9, the direction of the arcuate portion 8 can be changed by 180 ° as shown in FIG.

As shown in FIGS. 1 and 2, the pressing tool 4 includes a screw shaft 11 screwed to the base portion 5 of the frame body 2 and an abutting portion 12 fixed to the tip side of the screw shaft 11. A handle portion 13 for rotating the screw shaft 11 is integrally formed at the end of the shaft 11.

Next, the operation of this embodiment will be described with reference to FIG. The hook type safety clamp 1 of the present embodiment is attached to the bracing portion 16 of the single pipe 14 and the braces 15 obliquely intersecting the single pipe 14. That is, the frame 2 is sandwiched on the outer periphery of the single pipe 14, and the frame 2 is attached to the outer periphery of the braces 15 diagonally intersecting the arcuate portions 8 of the hooks 3 attached to the frame 2. . Since the hooks 3 are supported on the frame 2 by a cantilever pin, the hooks 3 can be easily attached to the outer periphery of the diagonal braces 15. Next, the handle portion 13 of the pressing tool 4 is rotated, the screw shaft 11 is screw-fed, and the contact portion 12 is brought into contact with the outer periphery of the single tube 14. Here, when the handle portion 13 is further rotated, the braces 15 are pulled toward the single pipe 14 side via the hooks 3 and 3, and both are closely fixed to each other. Due to the above, the cross bracing portion 16 is firmly joint-joined.

In the case of the hook-type safety clamp 1 shown in FIG. 1, the hook 3 is rotatably supported on the frame body 2 side around the pin 9, but cannot rotate about its axis. . Therefore, in FIG. 3, the diagonal braces 15 and the hooks 3 are engaged with each other while maintaining the crossing angle. FIG. 4 shows an embodiment for enabling the hook 3 to be engaged perpendicularly to the braces 15. In this embodiment, the hook 3a is made of a circular material having a circular cross section, and an arcuate portion 8a capable of engaging with the braces 15 (FIG. 3) or the like is formed on the tip side thereof. The base end side of the hook 3a is rotatably connected to the pin 9a. The head 17 formed at the base end of the hook 3a is for preventing the hook 3a from slipping out of the pin 9a. For complete accident prevention, the shaft of the hook 3a and the head 17 are It is made as one piece, and the diameter of the head 17 needs to be "caulked" to be sufficiently larger than the diameter of the hook 3a. The pin 9a is pivotally attached to the side plate 6 of the frame 2 as in the above-described embodiment, and is prevented from coming off by the split pin 10. With the above structure, the hook 3a is rotatable about the pin 9a and is supported on the pin 9a side so as to be rotatable about its axis. With the above structure, the hook 3a can change its direction automatically, and can be attached orthogonally to the diagonal braces 15.

In the above embodiments, the connecting structure between the hooks 3 and 3a and the frame 2 has been described, but the detailed structure is not limited to the above. Further, the shapes of the hooks 3 and 3a themselves are not limited to those illustrated.

[0015]

[Effect of the present invention]

 According to the present invention, the following remarkable effects are obtained. 1) By adopting a structure in which the hook is rotatably supported on the frame side, the joint connection at the intersections of the pipes can be performed more reliably and firmly. It is also possible to improve the bond strength and safety in the cross braced area. 2) The hook is attached to the pipe, and the pipe is joined to the pipe simply by pressing the pressing tool toward the pipe, which makes it extremely easy to handle and improves workability. 3) Since the direction of the hook can be freely changed, a reliable joint connection can be made regardless of the crossing angle of the pipes. 4) For example, the "caulking" shape in the present invention has a simple structure, can be manufactured at low cost, and can be used easily and safely on site.

[Brief description of drawings]

FIG. 1 is a perspective view showing the overall structure of an embodiment of a hook-type safety clamp of the present invention.

FIG. 2 is a partial cross-sectional view showing a detailed structure of a main part of FIG.

FIG. 3 is a perspective view for explaining the operation of the present embodiment.

FIG. 4 is a partial cross-sectional view showing the structure of the main part of another embodiment of the present invention.

FIG. 5 is a front view showing a schematic structure of a formwork support work to which this embodiment is applied.

FIG. 6 is a perspective view showing a schematic structure of a conventional root clamp clamp that is generally supported.

FIG. 7 is a cross-sectional view showing a joint connection of pipes by a conventional fixed hook.

[Explanation of symbols]

 I Hook type safety clamp 2 Frame 3 Hook 3a Hook 4 Pressing tool 5 Base part 6 Side plate 7 Opening part 8 Arc part 8a Arc part 9 pin 9a pin 10 Split pin 11 Screw shaft 12 Contact part 13 Handle part 14 Single pipe 15 Braces 16 Crossed braces 17 Heads

Claims (2)

[Scope of utility model registration request] 1. A clamp for fixing an intersecting portion of an intersecting pipe, which is a U-shaped frame body that can be clamped to the outer periphery of the pipe, and a base end side of which is attached to and detached from the open end side of the frame body. On the outer circumference of the pipe, there is a pair of hooks that are supported by a cantilever pin and that form an arc-shaped portion on the tip side that can be engaged with the outer circumference of the pipe, and a screw shaft that is screwed to the base side of the frame. A hook-type safety clamp, characterized in that a pressing tool is provided for fixing an abutting portion that abuts on the screw shaft end. 2. The hook-type safety clamp according to claim 1, wherein the hook is cantilevered on the frame side so as to be rotatable about its axis.