JPH076366Y2 - Detachment tool for mold clamps - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a detachable tool used for attaching and detaching a fastening metal fitting used for assembling a building formwork.

[Conventional technology]

It is common practice to form a wall by facing formwork and driving concrete between the formwork.

FIG. 5 shows the assembled state of the formwork, in which the cones 22 are screwed into both ends of the separator 21 installed between the left and right formwork 20,
A screw shaft 23 provided on the cone 22 is inserted into a hole 24 provided on the form 20, and the cone 22 keeps the interval between the left and right forms 20 constant.

Further, the fastening metal fitting 25 is screwed into the end of the screw shaft 23 of the cone 22 protruding from the formwork 20, and the fastening metal fitting 25 and the cone 22
The and () hold the vertical and horizontal flaps (26) along the outer surface of the mold (20) to prevent the mold (20) from moving outward.

Here, the tightening fitting 25 includes a tightening bolt 28 having at one end a screw hole 27 to be screwed into the screw shaft 23 of the cone 22, a nut 29 screwed to the other end of the tightening bolt 28, and the nut thereof.
It is composed of a fixing member 30 for fixing the flap 26 by screwing 29.

The tightening metal fitting 25 is removed when the formwork is disassembled after concrete is poured.

[Problems to be solved by the device]

By the way, when removing the tightening fitting 25, conventionally, since the nut 29 is removed from the tightening bolt 28 and then the tightening bolt 28 is removed, it is very time-consuming and time-consuming.

Then, the subject of this invention is providing the attachment / detachment tool of the fastening metal fitting which can remove and attach a fastening metal fitting efficiently.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, in the present invention, an engagement hole for a nut is formed in the tip end surface of a socket body, a retainer housing hole is provided in the depth of the engagement hole, and an inner periphery of the retainer housing hole is provided. Forms a plurality of cam surfaces in the circumferential direction in which the distance to the center of the socket body gradually increases toward both ends in the circumferential direction,
In the cage that is inserted into the storage hole and prevented from coming off,
A plurality of pockets are formed at positions facing the intersections of the adjacent cam surfaces, the rolling elements are housed in the pockets, and the rear end of the socket body has a square hole into which the drive shaft of the impact wrench is inserted. The configuration provided was adopted.

[Action]

When using the tool for attaching and detaching the formwork clamp with the above structure to remove the clamp, connect the socket body to the drive shaft of the impact wrench and place the tightening bolt of the clamp inside the socket body. While inserting it inside the cage, engage the nut screwed into the tightening bolt with the engaging hole of the socket body, rotate the socket body in that state, and rotate the socket body and the cage by rotating the cam. The rolling element is moved in the inner diameter direction by the surface, the clamping bolt is held by the plurality of rolling elements, and the rotational torque of the socket body is simultaneously applied to the clamping bolt and the nut.

〔Example〕

 An embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 to 4, an engagement hole 2 for a nut is formed on the tip surface of the socket body 1. The engagement hole 2 is a dodecagonal hole, but a hexagonal hole is also available. Good. Further, a cage housing hole 3 is formed at the inner side of the engagement hole 2, and a plurality of cam surfaces 4 are circumferentially provided on the inner circumference of the cage housing hole 3.

Each cam surface 4 is formed so that the distance to the center of the socket body 1 gradually increases toward both ends in the circumferential direction.

A retainer 5 is incorporated in the retainer housing hole 3, and a pocket 6 is formed in the retainer 5 at a position facing an intersection of the adjacent cam surfaces 4, and each pocket 6 is a retainer. It is open at the end face of No. 5.

A rolling element 7 is housed in each of the pockets 6, and in order to prevent the rolling element 7 from falling inside the cage 5, the width dimension of the opening on the inner diameter side of the pocket 6 is set to be smaller than the outer diameter of the rolling element 7. I made it small.

In order to prevent the rolling elements 7 from slipping out of the pockets in the axial direction, a seat plate 8 is installed on one side of the retainer 5, and the seat plate 8 is fitted by a retaining ring 9 fitted to the inner circumference of the storage hole 3. I'm holding it.

At the rear end of the socket body 1, there is provided a square hole 10 with which the drive shaft of the impact wrench is engaged. A groove 11 is formed on the outer periphery of the rear end of the socket body 1.
A radial pin hole 12 is provided at the bottom of 11.

The pin 13 is inserted into the pin hole 12, and the pin 13 is inserted into the groove 11
It is prevented from coming off by an elastic ring 14 which is detachably attached to.

When removing the tightening fitting 25 shown in FIG. 5 using the tool for removing the mold tightening fitting having the above-described structure, the drive shaft a of the impact wrench A is mounted in the square hole 10 of the socket body 1. After fitting and connecting with the pin 13, one end of the tightening bolt 28 of the tightening metal fitting 25 is inserted into the retainer 5 provided at the tip of the socket body 1 and screwed into the tightening bolt 28. The nut 29 is fitted into the engaging hole 2.

Then, the impact wrench A is driven to rotate the socket body 1.

The rotation of the socket body 1 causes the socket body 1 to rotate relative to the retainer 5 in the initial stage of rotation, and the rotation causes the rolling element 7 to be pushed by the cam surface 4 to move in the inner diameter direction, as shown in FIG. Hold the tightening bolt 28 from three directions.

Therefore, the rotation of the socket body 1 causes the rotation
Acts on both nut 29 and fastening bolt 28,
And tightening bolt 28 can be removed at the same time.

In addition, in the case of the embodiment, only the removal of the fastening member 25 from the mold 20 has been described, but even if the socket body 1 is rotated with respect to the retainer 5 in either the right rotation direction or the left rotation direction, the rolling element is rotated. Since 7 is pushed by the cam surface 4 and moves inward, it can also be used when the fastening metal fitting 25 is attached to the form 20.

Occasionally, it can also be used to remove the cone 22 attached to the tip of the separator 21 after removing the mold 20.

〔effect〕

As described above, according to the tool for attaching and detaching the mold clamping member according to the present invention, the tightening bolt of the tightening member and the nut screwed into the tightening bolt can be simultaneously rotated, so that the tightening Attachment and removal of metal fittings can be performed very efficiently. Therefore, the working time required for assembling and removing the formwork can be significantly shortened.

In addition, the weight of the tool itself is light, and the socket body can be held by hand during work, so workability is very good.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a tool for attaching and detaching a mold clamping member according to the present invention, FIG. 2 is a left side view of the same, and FIG. 3 is III of FIG.
-A sectional view taken along line III, Fig. 4 is a sectional view taken along line IV-IV in Fig. 1, and Fig. 5 is a sectional view showing an assembled state of the form,
FIG. 6 is a cross-sectional view showing a use state, and FIG. 7 is a VII of FIG.
FIG. 8 is a cross-sectional view taken along line VII, and FIG. 8 is a cross-sectional view showing the removed state of the tightening fitting. 1 ... Socket body, 2 ... Engagement hole, 3 ... Retainer housing hole, 4 ... Cam surface, 5 ... Retainer, 6 ... Pocket, 7
…… Rolling elements, 10 …… square holes.

Claims (1)

[Scope of utility model registration request] 1. An engagement hole for a nut is formed in a front end surface of a socket body, and a retainer housing hole is provided at the back of the engagement hole.
A plurality of cam surfaces are formed in the circumferential direction on the inner circumference of the cage housing hole so that the distance to the center of the socket body gradually increases toward both ends in the circumferential direction. In the container, a plurality of pockets are formed at positions facing the intersections of the adjacent cam surfaces, the rolling elements are housed in the pockets, and the drive shaft of the impact wrench is inserted into the rear end of the socket body. Tool for attaching and detaching formwork clamps with square holes.