JPH0839345A - Pipe cutter - Google Patents

Abstract

PURPOSE:To provide a pipe cutter in which the waste material of a concrete or iron cutting blade is made usable for a cutter for cutting a pipe from inside, whereby the price can be significantly reduced, and the breakage of the circumferential concrete of a drain pipe can manage with a quantity as small as a pulling space can be ensured. CONSTITUTION:A screw part 3 is formed on one end of a bar body 1 having a shank 2 formed on the other end, and a doughnut blade body 4 is fixed to the screw part 3 by a pair of clamp members, and the shank 2 is installed to a drill chuck.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe cutter, and more particularly to a pipe cutter for cutting a vinyl chloride pipe which has been erected from the floor in the construction of water supply facilities.

[0002]

BACKGROUND OF THE INVENTION Generally, when constructing a water supply facility or repairing a drainage facility, in order to expose a drainage pipe vertically buried in a floor, the surrounding concrete is destroyed, A saw was used to cut the drainage pipe in a circular manner and it was applied to the outside, and a horizontal operation procedure was followed.

[0003]

However, according to the above-mentioned conventional construction method, it is necessary to destroy the concrete in a wide area around the drainage pipe in order to secure an allowable space for operating the saw, and it is also necessary. This is a cause of spending a lot of energy and time and increasing the construction cost.

Therefore, a dedicated tool for cutting the drainage pipe from the inside has been developed, but the one currently on the market has a rotary blade integrated with the shaft and is extremely expensive. The custom is not exhaustive.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances and problems, and makes it possible to use a waste material of a cutting blade for concrete or iron as a cutter for cutting a pipe from the inside. The purpose of the present invention is to provide a pipe cutter that will reduce the price drastically, and will only need to destroy the concrete around the drainage pipe by destroying a small amount to secure a draining space.

[0006]

In order to achieve this object, a pipe cutter according to the present invention has a rod portion having a shank formed at one end and a screw portion formed at the other end, and a pair of clamp members is provided at the screw portion. According to this, the donut-shaped blade is fixed, and the shank is attached to the drill chuck.

[0007]

With this structure, it is possible to use the existing drill mounting tool and the cutting blade to be discarded, so that the product price and running cost are remarkably low. It does not require extensive destruction of concrete, requires only a short construction period, and allows pipes to be cut into slices from the inside.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described with reference to the drawings. FIG. 1 is a perspective view of a rod body of a pipe cutter embodying the present invention, and FIG.
3 is a perspective view of the blade body, FIG. 4 is a separated front view showing the fixing structure of the blade body by the clamp member, FIG. 5 is a sectional view of one clamp member, and FIG. 6 is a conceptual plan view showing the same working state. Is.

In these drawings, reference numeral 1 denotes a metal round bar body, and a shank 2 is formed at one end of the round bar body 1 to be mounted on a drill chuck in an existing electric drill mounting tool. It has become a thing.

A threaded portion is formed on the other end of the above-mentioned round bar body 1, and a blade body 4 described later is formed on the threaded portion 3 by a clamp member composed of an upper body 5 and a lower body 6. It is fixed.

Further, a scale 7 is formed in the portion of the round bar 1 near the shank 2 so that the cut depth position can be visually confirmed.

The upper body 5 of the above-mentioned clamp member has a flange portion 8 and a screw hole 9 formed in the central portion of the flange portion 8, and the screw hole 9 portion is a protruding portion 10 in the vertical direction. Is formed, and below the projecting portion 10 is a fitting portion of the center hole 11 of the doughnut-shaped blade body 4, and the meat of the blade body 4 is in the fitted state of the blade body 4. Regardless of the thickness, it is in a state where there is some protrusion.

Further, as the blade 4, a dedicated blade can be used as a matter of course, but in the present embodiment, it is considered to use waste material of concrete or a cutter for iron material. That is, the blade body having a small diameter due to wear is recycled.

Further, the lower body 6 of the clamp member has a flange 12, and a screw hole 13 communicating with the screw hole 9 of the upper body 5 is formed in the center, and between the screw hole 13 and the flange 12. Is a projecting portion 10 into which the blade body 4 of the upper body 5 is fitted.
Is a recess 14 for escape.

As described above, the blade body 4 is fixed to the thread portion 3 of the round bar body 1 by the upper body 5 and the lower body 6 of the clamp member, and the round bar body 1 is attached to the drill chuck of the electric drill by the flat 2. To be In that state, the blade body 4 is inserted to a necessary position inside the pipe P as shown in FIG.
The rotation of the pipe P cuts the pipe P from the inside.

[0016]

The pipe cutter according to the present invention is constructed and used as described above. Therefore, it is only necessary to minimize the concrete destruction around the target rising pipe, further, it is possible to use the existing electric drill mounting tool, and it is possible to recycle the blade that was conventionally discarded, which is extremely It can be supplied to customers as a low-priced product and the construction time can be greatly shortened.

[Brief description of drawings]

FIG. 1 is a perspective view of a rod body of a pipe cutter.

FIG. 2 is an exploded perspective view of a clamp member.

FIG. 3 is a perspective view of a blade body.

FIG. 4 is an isolated front view showing a structure in which a blade member is fixed by a clamp member.

FIG. 5 is a cross-sectional view of one clamp member.

FIG. 6 is a conceptual plan view showing a working state.

[Explanation of symbols]

 1 round bar body 2 shank 3 screw part 4 blade body 5 clamp upper body 6 clamp lower body 7 scale 8 flange 9 screw hole 10 projecting portion 11 center hole 12 flange 13 screw hole 14 recess P pipe

Claims (2)

[Claims] 1. A rod body having a shank formed at one end thereof is provided with a threaded portion at the other end thereof, and a donut-shaped blade body is fixed to the threaded portion by a pair of clamp members, and the shank is attached to a drill chuck. A pipe cutter characterized by: 2. The clamp member is formed with a fitting portion that matches the inner diameter of the blade body, and the other is formed with a recess that receives the fitting portion. Pipe cutter described in.