JPH10277835A - Corrugated resin pipe cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a corrugated resin pipe cutter which is capable of constantly cutting a corrugated resin pipe at the center of a crest of the pipe even when the pitch of corrugations of the corrugated resin pipe is changed or even when the diameter of the pipe is changed. SOLUTION: A receiving plate 4 fitting the groove of a corrugated resin pipe P is provided on one end of a cutter body 1 which is provided with a tool rest 8 capable of advancing and retracting motion by a feed screw 7. Further, two elastic guide plates 10 and a cutting edge 11 put in the middle between them, are mounted to the tool rest 8. Since the two elastic guide plates 10 sandwich a crest of the corrugated resin pipe P between themselves while deflecting by use of elasticity, the corrugated resin pipe P can be always cut at the center of a crest of the pipe.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrugated resin pipe cutter for cutting a corrugated resin pipe used as a protection pipe for a hot water supply pipe, a water supply pipe, an electric wire or the like at a mountain portion.

[0002]

2. Description of the Related Art As a hot water supply pipe, a composite pipe in which the periphery of a central metal pipe is protected by a corrugated resin pipe (corrugated pipe) and a heat insulating material is filled between the two pipes is used. In addition, there is a construction method in which a resin pipe is passed through a corrugated resin pipe as a water supply / hot water supply pipe. When cutting such a corrugated resin pipe, it is desirable to cut at the peak portion so that the cutting blade does not damage the central metal pipe or the resin pipe. Conventionally, a corrugated resin pipe cutter for that purpose has been used. It has been devised.

For example, Japanese Utility Model Publication No. 5-25834 discloses that
A semicircular socket is provided at the tip of the scissor-type body so as to face the circumference, and a circumferential guide rib engaging with the groove of the corrugated resin pipe is provided at each socket.
The corrugated resin pipe cutter provided with a cutting blade corresponding to the peak of the corrugated resin pipe is shown. However, in such a conventional corrugated resin pipe cutter, since the cutting position is determined by shifting the circumferential guide rib and the cutting blade by a half pitch of the wave, the pitch of the wave changes depending on the type of the corrugated resin pipe. And cutting at the center of the mountain becomes impossible. In addition, there is a problem that even when the diameter of the corrugated resin tube changes, cutting becomes impossible. For this reason, conventionally, it has been necessary to arrange a dedicated corrugated resin pipe cutter for each pipe diameter and wave pitch.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and always cuts at the center of the mountain even if the pitch of the wave of the corrugated resin tube changes or the diameter changes. The purpose of the present invention is to provide a corrugated resin pipe cutter capable of performing the following.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a corrugated resin pipe cutter according to the present invention is supplied to a cutter body provided with a receiving plate which enters a groove on the back side of the corrugated resin pipe. A tool rest that can move forward and backward with respect to this receiving part by a screw is provided, and two elastic guide plates sandwiching a mountain of a corrugated resin pipe are provided on the tool rest, and are located between these elastic guide plates, and are always at the center of the mountain A cutting blade for cutting the corrugated resin pipe is provided.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below. FIG. 1 is a central longitudinal sectional view of a corrugated resin pipe cutter of the present invention, FIG. 2 is a plan view, FIG. 3 is a right side view, and FIG. 4 is a left side view. In these figures, reference numeral 1 denotes a cutter body, and a receiving portion 2 having a V-shaped inside is integrally formed at one end thereof. The receiving portion 2 is provided with a vertical slit 3 as shown in FIGS. 2 and 4, and a receiving plate 4 having a similar V-shaped inside inside the slit 3 has a pin 5,
5 fixed.

The receiving plate 4 is formed by bending an elastic metal plate into a U-shape, and its lateral V-shaped tip enters the groove on the back side of the corrugated resin pipe P as shown in FIG. It has become. The receiving plate 4 has a horizontal V-shape, and is mounted so as to protrude slightly from the receiving portion 2. For this reason, even if the diameter of the corrugated resin pipe P changes as shown in FIG.
Can receive. Further, since the receiving plate 4 is made of an elastic metal plate, it can enter the groove on the back side of the corrugated resin pipe P while being deformed even if the pitch of the waves of the corrugated resin pipe P slightly changes.

[0008] A feed screw 7 rotatable by a knob 6 is provided at a lower portion of the cutter body 1. A base of a tool rest 8 that can move forward and backward with respect to the receiving portion 2 by the rotation of the feed screw 7 is screwed to the feed screw 7. As shown in FIGS. 1 to 3, a slit 9 is formed in the upper part of the tool post 8, and two elastic guide plates 10 and a cutting blade 11 are fixed inside the slit 9 by screws 12.

The elastic guide plate 10 has a shape in which the front end 13 of the flat plate is expanded up and down as shown in FIG. 1, and enters the groove of the corrugated resin pipe P as shown in FIG. Thereby, the peak of the corrugated resin pipe P can be sandwiched from both sides. Further, the cutting blade 11 is composed of these two elastic guide plates 1.
Since it is fixed at the center position of 0, the center of the mountain of the corrugated resin pipe P sandwiched from both sides by the two elastic guide plates 10 can be cut. The cutting edge of the cutting blade 11 is 2
The elastic guide plates 10 are almost the same as the distal ends thereof, and the two elastic guide plates 10 surely sandwich the mountain of the corrugated resin pipe P from both sides.

In order to cut the corrugated resin pipe P by using the corrugated resin pipe cutter of the present invention thus configured, first, it is attempted to cut with the tool rest 8 retracted as shown in FIG. The corrugated resin pipe P to be applied is brought into contact with the receiving portion 2, and the receiving plates 4 and 4 are inserted into the grooves of the corrugated resin pipe P. From this state, the feed screw 7 is rotated by the knob 6 to move the tool post 8 in the direction of the receiving portion 2, and the two elastic guide plates 10 on the upper portion of the tool post 8 are brought into contact with the corrugated resin pipe P. The elastic guide plates 10 enter the grooves of the corrugated resin pipe P while being bent by the elasticity of the elastic guide plates 10, and sandwich the mountain of the corrugated resin pipe P from both sides.

At substantially the same time as the above operation, the cutting blade 11 located at the center of the two elastic guide plates 10 cuts into the center of the peak of the corrugated resin pipe P. Then, if the cutter body 1 is rotated around the corrugated resin pipe P, the corrugated resin pipe P is cut cleanly from the center of the mountain by the cutting blade 11. In addition, the corrugated resin pipe cutter of the present invention can be cut without any trouble even if the diameter of the corrugated resin pipe P changes, and even if the wave pitch of the corrugated resin pipe P changes slightly, the two elastic guide plates 10 Cutting can always be performed from the center of the peak of the corrugated resin pipe P by utilizing elasticity.

[0012]

As described above, the resin pipe cutter according to the present invention always cuts at the center of the mountain even when the pitch of the waves of the resin pipe changes or the diameter changes. There are possible benefits.

[Brief description of the drawings]

FIG. 1 is a central longitudinal sectional view of a resin pipe cutter with corrugation of the present invention.

FIG. 2 is a plan view of a corrugated resin pipe cutter.

FIG. 3 is a right side view of the corrugated resin pipe cutter.

FIG. 4 is a left side view of the resin pipe cutter with corrugation.

FIG. 5 is a central longitudinal sectional view showing a cutting state.

FIG. 6 is an enlarged horizontal sectional view showing a cutting state.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 cutter body 2 receiving portion 3 slit 4 receiving plate 5 pin 6 knob 7 feed screw 8 turret 9 slit 10 elastic guide plate 11 cutting blade 12 screw 13 tip of elastic guide plate

Claims (1)

[Claims] 1. A cutter main body having a receiving plate which enters a groove on the back side of a corrugated resin pipe, a tool rest which can be advanced and retracted with respect to the receiving part by a feed screw, and the corrugated resin pipe is provided on the tool rest. 2. A corrugated resin pipe cutter, comprising: two elastic guide plates sandwiching the peak, and a cutting blade positioned between the elastic guide plates and always cutting the corrugated resin tube at the center of the peak.