JPH11198094A - Cutting tool for flexible resin tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cut a bellows-shaped flexible tube reliably at a crest thereof. SOLUTION: The tool used for cutting a flexible resin tube comprises a main body 20, a support plate 21 bent at its tip into a crest and mounted on the main body 20, a spindle 22 opposed to the inner side of the crest of the support plate 21 for a reciprocation toward or away from it, a spring 26 for pulling the spindle 22 toward the crest of the support plate 21, and a cutting edge member 24 slidably supported in the spindle 22 so as to be pressed by a spring 27 toward the crest of the support plate 21 and provided at its tip with a cutting edge 23. The spindle 22 is formed at its tip with a groove 32 that guides the bellowslike flexible resin tube so that the cutting edge 23 is right opposed to the crest thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cutting tool for a flexible resin pipe. More specifically, the present invention relates to a cutting tool for a flexible resin pipe, which can cut a serpentine flexible resin pipe used for hot water supply, a water supply pipe, or a protection pipe for an electric wire at the center of the mountain.

[0002]

2. Description of the Related Art A flexible resin protective tube, which has been used as a protective tube for electric wires, is now being used to protect a resin tube for piping used for piping such as gas appliances in a house. It is becoming. FIG. 3 shows this resin pipe 1 for piping.
2 shows a state in which a flexible resin tube 2 is fitted. Conventionally, cutters, knives, scissors and the like have been used for cutting such a flexible resin tube 2, but it has been difficult to cut a predetermined position accurately.

As a tool for cutting a non-flexible resin tube, a resin protection tube of a stainless steel flexible tube 5 with a resin protection tube 4 in which a stainless steel flexible tube 3 is coated with a resin protection tube 4 as shown in FIG. In order to cut the flexible pipe 4, a flexible pipe stripper as shown in FIG. 5 was used.

FIGS. 5A and 5B show a conventional flexible pipe stripper, in which FIG. 5A is a side view, and FIG.
It is sectional drawing in a line. As shown in the drawing, the flexible pipe stripper has a handle-shaped main body 6 and a receiving plate 9 having an elongated hole 7, which is fixed to the main body 6 by a thumb screw 8 so as to be extendable and contractible and whose tip is bent in a mountain shape. And a spindle 11 slidably supported by the main body 6 and urged in the direction of the mountain-shaped portion of the receiving plate 9 by a spring 10, and slidably supported by the spindle 11 and supported by the spring 12 And a cutting blade member 14 to which a cutting blade 13 is fixed at the tip.

As shown in FIG. 6, a stainless steel flexible tube 17 with a resin protection tube is sandwiched between the mountain-shaped portion of the receiving plate 9 and the spindle 11, and the main body 6 is centered on the stainless steel flexible tube 17 with the resin protection tube. Then, by rotating in the direction of arrow A, the outer protective resin protection tube 16 protecting the stainless steel flexible tube 15 can be cut by the cutting blade 13 of the cutting blade member 14 pressed by the spring 12. It has become. Actually, the protrusion of the cutting blade 13 is reduced so as not to damage the stainless steel tube.

[0006]

When the flexible resin protective tube shown in FIG. 3 is to be cut using the above-mentioned conventional flexible tube stripper, the cutting blade 13 is moved to the flexible resin tube 15 as shown in FIG. There is a problem that it is easy to fall into the valley of the hill, and it is difficult to cut the hill.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, an object of the present invention is to realize a cutting tool for a flexible resin pipe, which can surely cut a snake-shaped flexible resin pipe at its crest.

[0008]

According to a first aspect of the present invention, there is provided a cutting tool for a flexible resin pipe for cutting a flexible resin pipe which mainly protects a resin pipe which is installed in a room. 20, a receiving plate 21 attached to the main body 20 and having a tip bent in a mountain shape, a spindle 22 that can approach or separate from the inside of the mountain-shaped portion of the receiving plate 21, and Receiving plate 21
And a spring 26 biasing in a direction approaching the mountain-shaped portion, and slidably supported by the spindle 22, urged by a spring 27 in a direction approaching the mountain-shaped portion of the receiving plate 21, and A cutting blade member 24 having a cutting blade 23, and a groove 32 for guiding the cutting blade 23 so that the cutting blade 23 faces the center of a mountain portion of the flexible resin pipe having a serpentine shape at the tip of the spindle 22. Features. By adopting this configuration, a cutting tool for a flexible resin pipe can be obtained in which the center of the peak of the flexible pipe to be processed is guided to the cutting blade by the groove 32 and the center of the peak is reliably cut.

According to a second aspect of the present invention, the groove 32 has a V-shaped or U-shaped cross section. By adopting this configuration, as shown in FIGS. 2B and 2C, when the ridge of the flexible resin pipe to be processed is large, it is possible to support the pipe inside both walls of the groove and cut the center of the ridge. Out.

A third aspect of the present invention is characterized in that both side walls of the groove 32 are tapered so as to be tapered. By adopting this configuration, as shown in FIG.
When the crest of the flexible resin tube to be processed is small, the tube can be supported on the outside of both walls of the groove and the center of the crest can be cut.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1A and 1B show an embodiment of the present invention, wherein FIG. 1A is a front sectional view, and FIG.
FIG. 2C is an enlarged cross-sectional view taken along line cc of FIG. In the present embodiment, as shown in the figure, a handle-shaped main body 20, a receiving plate 21, a spindle 22 slidably supported by the main body 20, a slidably supported by the spindle 22, Blade member 24 having a cutting blade 23
A driving member 25 capable of engaging with the cutting blade member 24 and moving together with the spindle 22;
2 and a spring 27 for urging the cutting blade member 24.

The body 20 has a handle-like box-shaped part with a lid fixed by screws, and a spindle 22 inside.
And a housing for housing a spring 26 for biasing the spindle 22 are formed. On one side surface, a guide groove for guiding the receiving plate 21 and the receiving plate 21 by a thumb screw 28 are provided. A screw hole 29 for fixing is formed.

The receiving plate 21 is shaped like a plate which is guided by the guide groove of the main body 20 and slides.
A long hole 21a is provided for fixing at the end, and the tip is bent in a mountain shape.

The spindle 22 is provided with a pedestal 30 at the tip of a sliding portion that can slide on the guide portion of the main body 20, and the pedestal 30 is cut as shown in FIGS. A groove 32 is provided to guide the flexible resin tube 31 having a serpentine shape so that the center of the mountain portion faces the cutting blade 23 when the flexible resin tube 31 is supported.

The groove 32 has a V-shaped or U-shaped cross section, and both side walls are inclined so that the tip is tapered. It is preferable that the upper edge of the cradle 30 has a gentle V-shape as viewed from the side as shown in FIG. The spindle 22 is urged in the direction of the mountain-shaped portion of the receiving plate 21 by a spring 26 engaged with one end and the other end engaged with the main body. The spindle 22 is provided with a guide portion for slidably supporting the cutting blade member 24.

The cutting blade member 24 has a cutting blade 23 fixed to the tip thereof, and the cutting blade 23 is located at the center of a groove 32 provided in a receiving base 30 of the spindle 22. The cutting blade member 24 is slidably supported by the guide portion of the spindle 22 and is urged by a spring 27 in the direction of the mountain-shaped portion of the receiving plate 7. In addition, a projection 24 a that engages with the driving member 25 is formed at the lower end of the cutting blade member 24.

The driving member 25 is a trigger-like lever 25a.
And a projection 25 b that engages with a projection 24 a provided on the cutting blade member 24, and is slidably received in the main body 4 together with the spindle 22. The protrusion 25 of the driving member 25
The cutting blade can be easily replaced by releasing the engagement of the projection b with the projection 24a of the cutting blade member 24.

In order to use the present embodiment configured as described above, first, the receiving plate 21 is connected to the flexible resin tube 31.
And is fixed at a predetermined position by a thumb screw 28 in accordance with the diameter of. Next, the lever 25a of the driving member 25 is
Push down in the direction of arrow D against the urging forces of 6, 27 to widen the interval between the pedestal of the spindle 22 and the mountain-shaped portion of the receiving plate 21, insert the flexible resin tube 31 between them, and release the lever 25a. The flexible resin tube 31 between the receiving base 30 of the spindle 22 and the mountain-shaped portion of the receiving plate 21.
Sandwich.

At this time, if the ridge of the flexible resin tube 31 is small, as shown in FIG. 2A, the ridges are supported by the outer surfaces of both side walls of the groove 32 and the center of the ridge and the cutting edge 23 are cut off. The center coincides. In addition, when the peak of the flexible resin tube 31 is in the middle position, as shown in FIG. 2B, the center of the peak and the cutting blade 2 are supported by the inner surfaces of both side walls of the groove 32 to support the peak.
3 coincides with the center. In addition, the flexible resin tube 3
When the peak of No. 1 is large, as shown in FIG.
The center of the ridge coincides with the center of the cutting blade 23 because the ends of the two side walls 2 support the ridge.

As described above, the pedestal 30 of the spindle 22
By rotating the main body 20 in the direction of arrow E about the flexible resin tube 31 in FIG. 1A with the flexible resin tube 31 sandwiched between the The cutting edge 23 allows the flexible resin tube 31 to be cut at the center of its peak. In this way, the flexible resin tube 31 can be reliably cut at the center of the mountain regardless of the size of the mountain.

[0021]

According to the cutting tool for a flexible resin pipe of the present invention, a groove is provided at the tip of the spindle so that the cutting blade is aligned with the center of the mountain of the flexible resin pipe so that the cutting edge is aligned. The flexible resin tube can be guided by the groove, and the flexible resin tube 31 can be reliably cut at the center of the mountain regardless of the size of the mountain.

[Brief description of the drawings]

FIGS. 1A and 1B are views showing an embodiment of the present invention, wherein FIG. 1A is a front sectional view, FIG. 1B is a view taken in the direction of arrow B in FIG. 1A, and FIG. It is an expanded sectional view in a line.

FIG. 2 is a diagram showing a use state of the embodiment of the present invention.

FIG. 3 is a view showing a state in which a flexible resin pipe is fitted to a pipe resin pipe.

FIG. 4 is a view showing a conventional stainless steel flexible tube with a resin protection tube.

FIG. 5 is a view showing a conventional flexible pipe stripper;
(A) is a side view, (b) is a cross-sectional view taken along line bb in (a).

FIG. 6 is a diagram for explaining a problem to be solved by the invention.

[Description of Signs] 20 ... Main body 21 ... Receiving plate 22 ... Spindle 23 ... Cutting blade 24 ... Cutting blade member 25 ... Drive member 26,27 ... Spring 28 ... Thumb screw 29 ... Screw hole 30 ... Receiving base 31 ... Flexible resin Pipe 32 ... groove

Claims (3)

[Claims] 1. A tool for cutting a flexible resin pipe mainly for protecting a resin pipe for piping in a room, comprising: a main body (20); and a tip attached to the main body (20) and bent into a mountain shape. Receiving plate (21) and the receiving plate (2)
A spindle (22) that can approach or separate from the inside of the mountain-shaped portion of 1), and a spring (26) that biases the spindle (22) in a direction approaching the mountain-shaped portion of the receiving plate (21); And slidably supported by the spindle (22), urged by a spring (27) in a direction approaching the mountain-shaped portion of the receiving plate (21), and having a cutting blade (23) at the tip.
A groove (32) for guiding the tip of the spindle (22) so that the cutting blade (23) faces the center of the ridge of the flexible tubular resin tube. A cutting tool for a flexible resin pipe, comprising: 2. The cutting tool for flexible pipes according to claim 1, wherein the groove has a V-shaped or U-shaped cross section. 3. The device according to claim 1, wherein both side walls of said groove are tapered so as to be tapered.
Or the cutting tool for flexible resin pipe according to 2.