JPH07158260A - Hook device for scaffold - Google Patents

Abstract

PURPOSE:To provide a hook device for scaffold which can stably fix a scaffold by being hooked on a pipe member and holding it. CONSTITUTION:A hook part 13 to be hooked on a horizontally extending pipe member 15 has a frame part 16, and a wedge body 17 is fitted thereto. The pipe member-side edge 18 of the wedge body 17 is formed circularly to be laid along the pipe member outer circumferential surface, so that the wedge body makes face contact with the pipe member. The pipe member opposite-side edge 19 of the wedge body 17 and the pressing part 20 making contact with this edge of the frame part are formed circularly, and the center B of this circle is situated forward above the center A of the pipe member, so that the wedge body 17 is rotated around the center B and advanced, when pushed in, to push the pipe member 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hook device for a scaffold used for attaching a tread, etc. in a scaffold used for construction work or the like.

[0002]

2. Description of the Related Art In recent years, wedge type scaffolds in which each member is attached to a scaffold by using wedges instead of screw clamps have been widely used because of high work efficiency. In this wedge-type scaffolding, the treads are attached by being hooked on brackets that project laterally from the columns. This bracket is usually cantilevered and has a wedge receiver only on the column side, and the tread is
It has a wedge at one corner of one end and is fitted into this wedge receiver, and has a hook at the other corner so that it can be attached by hooking it on the bracket tip.

In this conventional tread, since the depths of the wedges fitted in the wedge receivers are not necessarily uniform, the hooks are lifted up or the treads are distorted, so that the tread tends to be shaken. , Unsatisfied with safety.

[0004]

SUMMARY OF THE INVENTION The object of the present invention is to provide a new hook device which can not only be hooked, but also can securely hold the bracket to fix the tread plate in a stable manner. .

[0005]

According to the present invention, a hook portion which can be hooked on a horizontally extending pipe member from above, a frame portion provided at a rear portion of the hook portion, and a hook portion which can be inserted into and removed from the frame portion are provided. The wedge member sandwiches the pipe member with the front portion of the hook portion by being pushed downward, and the edge of the wedge member on the pipe member side is formed in an arc shape along the outer peripheral surface of the pipe member. The wedge-shaped end portion of the wedge member opposite to the pipe member and the pressing portion of the frame portion in contact with the end portion of the frame member opposite to the pipe member are formed in an arc shape having a center forward and upward from the center of the pipe member. It is a hook device for scaffolding.

[0006]

EXAMPLES Hereinafter, examples illustrating the present invention will be specifically described.

The scaffolding hook device 10 is provided at a corner of the plate portion 12 of the tread 11.

The hook portion 13 is formed by forming a substantially semicircular recess 14 at the lower end of a substantially square plate, and the rear (right side in FIGS. 1 and 2) end is joined to the plate portion 12. Therefore,
The hook portion 12 can be hooked on the horizontally extending pipe member 15 of the bracket simply by lowering it from above.

The frame portion 16 has a substantially U-shaped plane and a substantially inverted L-shaped front surface, and is provided on the rear side surface of the hook portion 13. The wedge body 17 is made of a plate piece and has a frame portion 16
It is fitted so that it can come in and out from above.

The green end 18 of the wedge body 17 on the pipe member side is
It is formed in an arc shape along the outer peripheral surface of the pipe member 15, that is, in an arc shape centered on the center A of the pipe member 15. The pressing portion 20 in contact with the pipe member opposite end edge 19 of the wedge body 17 and the pipe member opposite end edge 19 of the frame portion 16 is located forward and upward from the center A of the pipe member 15 (upper left in FIGS. 1 and 2). It is formed in an arc shape having B.

The lower end portion of the wedge body 17 is provided with a projection 21 projecting laterally, so that when the wedge body 17 is pulled out upward, it does not come off from the frame portion 16. Pins 22 projecting to both sides are provided at the upper end portion of the wedge body 17, so that the wedge body 17 does not fall downward when it is not attached to the pipe member 15. A small recess 23 is formed on the pipe member side edge 18 of the wedge body 17, so that when the wedge body 17 is pulled out upward, the wedge body 17 is caught in the upper end edge of the frame portion 16 so that the wedge body 17 remains stable in that state. Has been

Since the hook device 10 is constructed as described above, it is used as follows. First, the wedge body 17 is pulled out upward to the state shown by the phantom line in FIG.
This state is stable due to the small recesses 23. Thus
The hook portion 13 is hung on the pipe member 15 from above and hooked. Next, the wedge body 17 is put into the frame portion 16, and the upper end is hit with a hammer and strongly pushed.

In this way, the wedge body 17 is moved to the center B by the action of the edge 19 on the side opposite to the pipe member and the pressing portion 20.
Since the center B is located in front of the center A of the pipe member 15 (to the left in the figure),
The wedge body 17 presses the pipe member 15, and the hook portion 13
The hook device 10 is firmly connected to the pipe member 15 by being sandwiched between the hook member 10 and the front portion. At this time, the center B is the center A
Since the pipe member 15 is located above, the wedge member 17 can press the pipe member 15 even in a portion below the center of the pipe member 15. Further, since the pipe member side edge 18 of the wedge body 17 is formed in the same arc shape as the outer peripheral surface of the pipe member 15, the wedge body 17 is formed by the pipe member 15.
Therefore, the pipe member 15 will be in surface contact with and will be pushed over a wide area, so that the pipe member 15 will not be damaged or deformed.

To remove the hook device 10, the lower end of the wedge member 17 may be hit with a hammer and pulled out upward.

[0015]

As described above, the scaffolding hook device of the present invention can be attached and detached only by pushing the wedge body with the hammer to push it in or pulling it out. Since it is sandwiched, unlike the case where the hook is simply hooked, it can be firmly fixed to the pipe member.

In this hook device, since the pressing portion of the wedge member which is in contact with the end of the wedge member opposite to the pipe member and the end of the frame portion which is opposite the end member of the pipe member is formed in an arc shape, when the wedge member is pushed in, the wedge member is The pipe body can be satisfactorily pressed because the center of the circular arc is located in front of the center of the pipe member so as to rotate around the center of the circular arc. Moreover, since the center of this arc is located above the center of the pipe body, the wedge body presses the pipe member even in the portion below the center of the pipe member. Furthermore, since the edge of the wedge member on the pipe member side is formed in the same arcuate shape as the outer peripheral surface of the pipe member, the pipe member is pushed by the wedge member in a large area, and therefore, it is pressed with a strong force. Therefore, it is not damaged or deformed.

Further, in this hook device, since the wedge body presses in a wide area in a circular arc shape, it is possible to make the front portion of the hook portion, which sandwiches the pipe member on the opposite side, into a shape in which the vertical portion or the tip portion is widened. By doing so, the hook device can be vertically lowered and hooked to be attached. For this reason, it is possible to use it together with wedges, which can be lowered vertically, and can be applied to a tread.

When this hook device is applied to a tread and mounted on a bracket, the tread is stable and the feeling of use is improved.
The safety is improved, and at the same time, the stability and strength of the scaffold can be improved. Of course, this hook device is not limited to a tread plate, and can be widely applied to the attachment of fire striking materials (members that obliquely join scaffold members).

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a plan view of the same example.

[Explanation of symbols]

10 ... Scaffolding hook device, 11 ... Tread, 12 ... Plate part, 1
3 ... Hook part, 14 ... Recessed part, 15 ... Pipe member, 16 ...
Frame portion, 17 ... Wedge, 18 ... Edge of wedge member on pipe member side, 19 ... Edge of wedge member on opposite side of pipe member, 20 ...
The pressing portion of the frame portion, 21 ... Protrusion, 22 ... Pin, 23 ... Small concave portion, A ... Center of pipe member, B ... Edge of wedge member on opposite side of pipe member and center of arc of pressing portion of frame portion.

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[Procedure amendment]

[Submission date] January 26, 1994

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

Claims (1)

[Claims] 1. A hook portion which can be hooked on a horizontally extending pipe member from above, a frame portion which is provided at a rear portion of the hook portion, and a hook portion which is provided in and out of the frame portion and is pushed downward. The wedge member sandwiches the pipe member with the front part of the hook portion, and the edge of the wedge member on the pipe member side is formed in an arc shape along the outer peripheral surface of the pipe member, and the end of the wedge member on the opposite side of the pipe member is formed. The scaffolding hook device, wherein the edge and the pressing portion of the frame portion, which is in contact with the opposite end of the pipe member, are formed in an arc shape having a center in the front upper direction from the center of the pipe member.