JP2002337057A - Cone detaching wrench - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rapidly cut a concrete slag, immediately detach a nut of cone, and extend a life duration of a wrench. SOLUTION: A cylindrical wrench body 2 is provided with a connecting portion 4 on the base side thereof. A hexagonal wrench portion 5 is formed inside an opening on the leading side to protrude from an end face of the wrench portion, and forms a sawtooth edge portion 6 with the almost orthogonal cutting side and the inclined opposite side. Each side of a wrench portion forms one sawtooth edge portion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cone-removing wrench for removing a receiver (commonly called a cone or a pea cone) for a concrete form spacing holder.

[0002]

2. Description of the Related Art Hitherto, Japanese Utility Model Laid-Open No. 7-15268, which has been filed as a wrench for attaching and detaching a cone, has been provided to the general market as a corn detachable wrench.

In the wrench for attaching and detaching the cone, the wrench 8 is formed in the inner surface of the center hole 4 at a position slightly behind the peripheral edge of the opening of the main body 1, particularly in the wrench and the teeth.
The inner diameter of the wrench 8 is set to be slightly smaller than the opening diameter of the center hole 4 at the tip of the main body 1 to form a step 11 at the tip of the wrench 8, and the wrench is inclined downwardly inward on the step surface. It comprises a guide inclined surface 12 and a toothed portion 10 for concrete slag removal on the periphery of the opening at the tip.

When using the wrench, first, the center hole 4 of the main body 1 is fitted to the bolt 6 of the cone 5, and the concrete swarf removing tooth portion provided on the peripheral edge of the opening at the front end of the main body 1 is rotated to rotate the concrete spar 9. The nut 7 is fitted and engaged with the wrench 8 by the wrench introduction guide inclined surface 12 while removing the nut, and the nut 7 is removed by rotating as it is.

[0006]

Conventionally, after removing a concrete form, a cone is removed using a rotary tool (usually using an electric impact driver). In the wrench, the tooth portion 10 at the tip of the wrench portion 8 is thin and the tooth portion 10 is worn out immediately in a large number of removal operations, so that the tooth portion 10 does not function. After the concrete having the height of the tooth portion 10 is scraped off, the wrench Since it is hooked on the part 8 and the nut part 7 is rotated and removed,
If the concrete slag is not removed more than necessary, it will not work on the nut part 7, and it will take much time to remove it, and the tooth part 10 will be severely worn like the above, and workability such as replacing the wrench during the work will be required. Was bad and not economic.

[0007] The above-mentioned abrasion is caused by the fact that the teeth 10 are rectangular and the tips are flat, so that the tips of the teeth 10 are sharply worn out due to friction, and the concrete slag inside the cone is formed between the teeth 10. When it is full, the surface of the slag is
The ability to rotate and scrape 0 was extremely small, and the life of the wrench was shortened.

Further, the conventional mountain-shaped teeth (substantially equilateral triangular teeth) which are provided in small numbers around the distal end become sharply sharpened when the distal end is slightly reduced.
As well as clogging, the sharpness becomes worse, and it can be used for the time being, but the efficiency of concrete slag removal is lowered, and it is not preferable because the working efficiency becomes extremely poor, and usually, since the amount of cones to be removed from the concrete wall is very large, It was desired that it be quickly removed for work.

[0009]

According to a first aspect of the present invention, there is provided a cone detachable wrench having a hexagonal wrench formed inside a distal end opening, protruding from the distal end surface of the wrench, and having a side substantially opposite to a right angle. Are formed, and one serrated blade is formed on each side of the wrench.

From the above description, since the wrench is formed up to the tip of the saw-toothed blade, the concrete bar is removed by the saw-toothed blade, and when the nut to be removed is exposed, the nut is immediately hooked onto the nut. The nuts can be removed quickly because they lead to rotation quickly.

Further, the outer periphery of the saw-toothed blade portion and the central portion of the hexagonal surface of the hexagonal wrench portion are thicker, the corners in contact with the respective surfaces are thinner, and the front side of the sawtoothed blade portion to be cut is formed with a thin angle. Therefore, it is easy to scrape off and the efficiency of removing concrete slag is high.

Further, one serrated blade portion is formed on each side of the wrench portion, and the gap between the serrated blade portions is large, so that the shavings from which the concrete slag has been removed can be discharged well. Efficient for removing slag.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION
A connecting portion for connecting a rotary tool such as an electric impact driver is provided on the base end side of the cylindrical wrench main body.

A hexagonal wrench is formed inside the distal end side opening of the cylindrical wrench main body, and a saw-toothed blade part is formed so as to protrude from the distal end surface of the wrench part and to incline the side to be cut off at a substantially right angle to the opposite side. The wrench is formed with one saw-toothed blade for each side.

That is, since the outer peripheral surface of the cylindrical wrench main body and each side of the wrench portion inside the opening form a saw-toothed blade portion, the front side of the saw-toothed blade portion to be cut is formed with a thin angle. ing.

The above-mentioned cone is a part of a part for holding and fixing the concrete formwork at the time of placing concrete. After removal, the cone can be removed by removing the nut inside.

Further, the electric impact driver of the rotary tool has a force for easily drilling a hole in a concrete wall by intermittently vibrating back and forth when the rotation stops.
It is also used for removing cones to which concrete slag adheres as in the present application, and is generally used in many construction sites.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a corn detachable wrench. In the center of the cylindrical wrench body 2 and the end face on the base end side, there is provided a rod-shaped (hexagonal bar in the figure) connecting portion 4 connected to the electric impact driver 3.

Therefore, as shown in FIG. 2, the cylindrical wrench main body 2 has a wrench portion 5 having a hexagonal inner side formed on the inner surface thereof, and a saw-toothed blade formed on the distal end surface of the cylindrical wrench main body 2. A part 6 is provided.

The saw-toothed blade portion 6 has a saw-tooth shape having a clearance angle 8 in which the rear side is inclined opposite to the cutting tooth 7 in which the front side to be shaved is substantially perpendicular. One serrated blade 6 is formed.

The outer peripheral portion of the cylindrical wrench body 2 and the central portion in the circumferential direction of the hexagonal surface of the wrench portion 5 are thicker, and the corners where the hexagonal surfaces contact each other are thinner. And the cutting teeth 7 on the front side of the saw-toothed blade portion 6 to be cut are formed thin and angled.

As shown in FIG. 3, when the cone 10 exposed in the buried state on the concrete wall 9 is removed, the nut 12 of the separator bolt 11 is now removed.
Then, the cone 10 is fixed, and the one in which the concrete barb 13 is adhered to the inside of the cone 10 is removed.

First, the connecting portion 4 of the cylindrical wrench body 2
Is connected and fixed to the electric impact driver 3, and in this state, the cylindrical wrench main body 2 is fitted to the end of the separator bolt portion 11 protruding from the inside of the cone 10, and the cylindrical wrench main body is 2 and the concrete saw 13 is scraped off by the saw tooth blade 6 by the rotation.

At that time, as soon as the nut 12 to be removed is exposed from the concrete bar 13, the wrench 5 near the tip of the saw-toothed blade 6 starts to hook on the nut 12, and the front and rear of the impact driver 3 in that state. Of the nut 12 gradually removes the concrete slag 13 from the tip of the nut 12, so that the wrench 5 on the inner side of the saw-toothed blade 6 is easily hooked.
While the nut 3 is being removed, the rotation of the nut 12 starts, and the nut 12 is quickly removed.

In the removal of the concrete slag 13, when the impact driver 3 is turned to remove the concrete, the cutting teeth 7 of the serrated blade 6 are firstly scraped and then strongly pressed. The rotation of the impact driver 3 stops, and the saw-toothed blade 6
The concrete slag 13 can be quickly removed by the action of piercing with the tip of the concrete.

The outer periphery of the saw-toothed blade 6 and the center of the hexagonal surface of the hexagonal wrench 5 are thicker, and the corners where the respective surfaces contact each other are thinner. Since it is formed with a thin angle, the concrete noro 13 is quickly scraped off.

Further, since the space between the serrated blades 6 is largely open, the scraped concrete slag 13 is discharged from the space between the serrated blades 6, thereby causing clogging. And scrape off the concrete slag 13 quickly.

As described above, the wrench 5 is fastened to the nut 12 while the concrete barn 13 is being removed, and the nut 12 is quickly removed, so that the cone 10 can be quickly removed from the concrete wall 9.

That is, when removing the cone 10 exposed in the state of being buried in the concrete wall 9, regardless of the presence or absence of the concrete bar 13 inside the cone 10, the nut 1 is removed.
2 is a corn wrench 1 for quick and easy removal.

[0030]

The present invention is embodied in the form described above. In particular, a connecting portion for connecting a rotary tool is provided on the base end side of the cylindrical wrench main body, and a hexagonal wrench portion is provided inside the opening on the front end side. The wrench portion is formed so as to protrude from the tip end surface thereof, and a saw-tooth-shaped blade portion is formed in which the side to be shaved is substantially perpendicular to the opposite side. Because each has formed

When the nut to be removed by removing the concrete bar is exposed to some extent, the nut is immediately hung on the nut and rotated, so that the nut can be quickly removed. Usually, since the amount of cones on the concrete wall is very large, it can be quickly removed. In doing so, it greatly contributes to efficiency and cost.

In addition, the thickness of the important portion of the saw-tooth-shaped blade portion for removing the concrete slag is thick, resistant to abrasion, and the life of the wrench can be extended.

Further, since the cutting teeth on the front side of the saw-toothed blade portion to be cut are formed with a thin angle, the concrete slag can be cut off efficiently and quickly.

In addition, since the gap between the serrated blades is open, the scraped concrete slag is quickly discharged from between the serrated blades, and the concrete slag is not clogged. Can be removed quickly and efficiently.

In addition, by using an electric impact driver, as soon as the concrete slag is removed and the nut is exposed, the nut starts to be applied to the nut. Removal can be done quickly and work efficiency can be increased, thereby reducing costs. Therefore, the present invention has a significant effect in practical use.

[Brief description of the drawings]

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

FIG. 2 is a front view of the embodiment of the present invention.

FIG. 3 is a side sectional view of a main part showing a use state.

[Explanation of symbols]

 Reference Signs List 1 wrench for detaching and mounting cone 2 cylindrical wrench body 3 impact driver 4 connecting part 5 wrench part 6 sawtooth blade part 7 cutting tooth 8 clearance angle

Claims (1)

[Claims] A connecting portion for connecting a rotary tool is provided at a base end side of a cylindrical wrench main body, a hexagonal wrench portion is formed inside a front end side opening, a side protruding from a front end surface of the wrench portion and shaving side. A serration-shaped wrench characterized by forming a saw-toothed blade portion having a substantially right angle and the opposite side inclined, and forming one sawtooth-shaped blade portion on each side of the wrench portion.