JP2622930B2 - Removable tool for concrete formwork clamp - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete form clamp.

[0002]

2. Description of the Related Art First, a concrete form fastener which is generally called a foam tie will be described with reference to FIGS.

[0003] This concrete formwork tightening fitting includes a mounting bolt rod 1 (mounting bolt body), a pipe holding member 8 inserted into the mounting bolt rod 1, and a tightening screw screwed to the mounting bolt rod 1. And a female screw hole provided at a base end of the mounting bolt rod 1 in a male screw protruding rod 11 of a separator 10 protruding from an outer surface of a side-by-side concrete formwork 9 (slug plate). 12 is screwed by turning the mounting bolt rod 1 and screwing the pipe 13 into contact with the outer surface of the concrete form 9; 8 presses the pipe 13 against the outer surface of the concrete formwork 9.

Conventionally, when removing such a concrete tightening fitting, the nut 3 tightening and contacting the pipe holding member 8 is rotated by a spanner or a rotary tool fitted from the tip end of the mounting bolt rod 1. To the tip side of the mounting bolt rod 1 to loosen it, and then rotate the mounting bolt rod 1 with a spanner or a rotary tool using the flattened portion 5 which also serves as a stopper for the nut 3 formed at the tip of the mounting bolt rod 1. And remove it from the male screw protruding rod 11.

[0005] Therefore, the nut 3 must be loosened at the time of removal, and then the mounting bolt rod 1 must be loosened.
Removal work is very troublesome.

Therefore, in recent years, a fitting hole 2 is formed at the tip of the rotating body A to be mounted on the electric tool from the tip side of the mounting bolt rod 1, and a nut 3 screwed to the mounting bolt body 1 is formed. A nut fitting portion 4 which is engaged with the fitting bolt body 1 in a fitted state from the distal end side thereof is formed at a distal end portion of the fitted hole 2 of the rotating body A, and the nut engaged with the nut fitting portion 4 is formed. The fitting bolt body fitting portion that engages with the crushed portion 5 at the tip of the mounting bolt body 1 protruding from the fitting hole 2 toward the base side of the fitting hole 2 is connected to the nut fitting portion 4.
There has been proposed a tool for attaching and detaching a concrete form clamp fastener formed at the base of the fitted hole 2 on the bottom side of the above. According to this, by rotating this one rotating body A at the time of removal, the nut 3 is held by the nut fitting portion 4 and the nut 3 is attached by the mounting bolt body fitting portion engaged with the crushed portion 5 together with the nut 3. By turning the bolt rod 1, the mounting bolt rod 1 can be removed from the male screw projecting rod 11.

[0007]

However, in actuality, when the nut 3 is tightened, the length of the mounting bolt rod 1 protruding from the nut 3 is not constant but slightly different. Therefore, there is a problem that the crushed portion 5 at the tip of the mounting bolt rod 1 does not always engage with the mounting bolt body fitting portion in a state where the nut 3 is fitted to the nut fitting portion 4. That is,
Although there is a difference in the standard of the mounting bolt rod 1, the tightening position of the nut 3 with respect to the mounting bolt rod 1 is not always constant because the degree of tightening of the nut 3 is slightly different due to various factors such as a difference in the shape of the pipe 13. Because. Therefore, as described above, the crushed portion 5 having only a small length does not always engage with the mounting bolt rod fitting portion, and the nut 3 cannot be held and the mounting bolt rod 1 cannot be removed. Have a busy problem.

The present invention solves such a problem, and ensures that the nut is securely attached to the nut fitting portion even if the length of the mounting bolt rod projecting from the nut differs due to the difference in the degree of tightening of the nut. It is an object of the present invention to provide an excellent concrete formwork fastening tool attaching / detaching tool in which a crushed portion is fitted to a bolt body fitting portion and an intended purpose can be reliably achieved.

[0009]

The gist of the present invention will be described with reference to the accompanying drawings.

[0010] At the distal end of the rotating body A is provided a fitting hole 2 which is fitted into the mounting bolt body 1 of the concrete formwork fastening fitting to be attached to the concrete formwork 9 from the front end side, and is screwed to the mounting bolt body 1. The nut fitting portion 4 that engages with the nut 3 in a fitted state from the tip end side of the mounting bolt body 1 is attached to the rotating body A.
At the front end of the fitting hole 2, the nut 3 engaged with the nut fitting portion 4 and protrudes toward the base side of the fitting hole 2 and is engaged with the crushed portion 5 of the tip of the mounting bolt body 1. A tool for attaching and detaching a concrete form clamping fastener, wherein the bolt body fitting portion 6 is formed at the base of the fitting hole 2 on the bottom side of the nut fitting portion 4,
The slide body 6A is inserted into the fitting hole 2 of the rotating body A.
, And is slidably disposed in the depth direction of the fitting hole 2, and the mounting bolt body fitting portion 6 is recessed in the slide body 6 </ b> A, and the slide body 6 </ b> A is rotated. The elastic body 23 is disposed between the inner bottom of the moving body A and the adjusting mechanism 7 for adjusting and holding the distance between the nut fitting part 4 and the mounting bolt body fitting part 6 at a predetermined position. The present invention relates to a detachable tool for fastening a concrete formwork fastener.

[0011]

As shown in FIGS. 1 and 2, in the state where the concrete form fitting is mounted, the mounting bolt 1
The female screw hole 12 at the base end thereof is screwed to the male screw projecting rod 11 of the separator 10 and is mounted so as to protrude from the outer surface of the concrete form 9. 8 holds a pipe 13 in contact with the outer surface of the concrete formwork 9, and a nut 3 screwing the pipe holding member 8 to the mounting bolt body 1 is tightened from the back. Accordingly, the mounting bolt body 1 projects outward from the nut 3.

The fitting hole 2 of the rotating body A is fitted from the tip side of the projecting mounting bolt body 1, and the nut fitting portion 4 formed at the tip of the fitting hole 2 is fitted to the nut 3. The mounting bolt body fitting portion 6 formed at the base portion at the back of the fitting hole 2 is fitted to the crushed portion 5 at the tip of the mounting bolt body 1. In this state, the rotating body A
Is rotated, the nut 3 is held by the nut fitting portion 4, and the mounting bolt body fitting portion 6 engaged with the crushed portion 5 is held.
As a result, the mounting bolt 1 is rotated together with the nut 3, and the female screw hole 12 of the mounting bolt 1 is pulled out of the male screw projecting rod 11.

At this time, there is a difference in the length of the mounting bolt body 1 protruding from the nut 3, and when the nut 3 is fitted into the nut fitting portion 4, the protruding length of the mounting bolt body 1 is short and the crushed portion 5 is formed. Since the nut fitting portion 4 does not reach farther, the nut fitting portion 4 does not reach the nut 3 and the crushed portion 5 to be fitted does not engage with the mounting bolt body fitting portion 6, or conversely, the protrusion of the mounting bolt body 1 The length is long, and the crushed part 5 is the mounting bolt body fitting part 6 first.
However, when the nut fitting portion 4 does not reach the nut 3 because the crushed portion 5 does not go any further, the mounting bolt body fitting The mating portion 6 is slid and adjusted so that the distance between the nut fitting portion 4 and the mounting bolt body fitting portion 6 matches the distance between the nut 3 and the crushed portion 5. To hold.

By performing this adjustment, there is a difference in the projecting length of the mounting bolt body 1, so that the proper operation can always be performed.

[0015]

In this embodiment, a fitting hole 2 is formed from the tip of a rotating body A provided on the base with an attachment portion 14 to be attached to an electric rotating tool 15, and the tip of the fitting hole 2, that is, Moving object A
A nut fitting portion 4 that fits with the nut 3 is provided at the tip of the nut, and a mounting bolt that fits into a flat crushed portion 5 at the tip of the mounting bolt body 1 protruding from the nut 3 at the back of the nut fitting portion 4. The body fitting portion 6 is formed.

In this embodiment, a support spring 23 is provided as an elastic body 23 at the bottom of the fitting hole 2 (the inner bottom of the rotating body A).
The adjusting mechanism 7 is configured to urge the slide body 6A having the mounting bolt body fitting portion 6 toward the nut fitting portion 4. When the mounting bolt body 1 has a long protrusion length, the mounting bolt With the support spring 23 pressed and contracted while the crushed portion 5 is engaged with the body fitting portion 6, the mounting bolt body fitting portion 6 (slide body 6 </ b> A) is pushed toward the base (bottom portion) away from the nut fitting portion 4. The nut 3 is fitted to the nut fitting portion 4, and reference numeral 26 is a stopper that limits the movement of the mounting bolt body fitting portion 6 on the distal end side.

[0017]

Since the present invention is constructed as described above, even if the length of the mounting bolt body protruding from the nut differs due to the difference in the length of the mounting bolt body according to the standard and the difference in the degree of tightening of the nut. The nut is securely fitted to the nut fitting part and the crushed part is fitted to the mounting bolt body fitting part, and it is possible to remove the mounting bolt body together with the nut while holding the nut when removing the concrete formwork fastener. An excellent tool for attaching and detaching concrete formwork fasteners.

Further, according to the present invention, the adjusting mechanism is provided in the fitting hole of the rotating body such that the slide body is prevented from rotating with respect to the fitting hole and is slidable in the depth direction of the fitting hole. In addition, since the mounting bolt body fitting portion is recessed in the slide body and an elastic body is disposed between the slide body and the inner bottom of the rotating body, the production is very simple and mass production is possible. It is an extremely practical concrete tool for attaching and detaching fasteners for concrete formwork that can fulfill its intended purpose without fail.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view for explaining a concrete formwork fastener.

FIG. 2 is a perspective view for explaining a concrete formwork fastener.

FIG. 3 is a side sectional view of the present embodiment.

FIG. 4 is a front view of the present embodiment.

FIG. 5 is a front sectional view of a fitting portion of a mounting bolt body according to the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mounting bolt body 2 Fitting hole 3 Nut 4 Nut fitting part 5 Crushed part 6 Mounting bolt body fitting part 6A Slide body 7 Adjustment mechanism 9 Concrete formwork 23 Elastic body A Rotating body

Claims (1)

(57) [Claims] 1. A turning hole is provided at a distal end of a rotating body with a fitting hole which is fitted from a tip side to a mounting bolt body of a concrete form tightening metal fitting to be attached to a concrete formwork, and a nut screwed to the mounting bolt body. A nut fitting portion that engages with the fitting bolt from the distal end side is formed at the distal end of the fitting hole of the rotating body, and the nut engaged with the nut fitting portion forms the base of the fitting hole. A mounting and dismounting tool for a concrete formwork fastener formed at a base of a fitting hole on the bottom side of a nut fitting part, the fitting part being engaged with a crushed part of a tip of the mounting bolt body protruding to the side. The slide body is provided in the fitting hole of the rotating body so as to be detented with respect to the fitting hole and slidably movable in the depth direction of the fitting hole. The fitting part is recessed, and the elastic body is provided between the slide body and the inner bottom A concrete mold fastening tool attaching / detaching tool, comprising an adjusting mechanism for disposing a body and adjusting and holding a distance between the nut fitting portion and the mounting bolt body fitting portion at a predetermined position.