JP3020869U - Soft resin pipe cutting tool - Google Patents

Abstract

(57) [PROBLEMS] To provide a soft resin pipe cutting tool capable of easily cutting a soft resin pipe in a plane perpendicular to an axis. SOLUTION: A receiving portion 3 for a soft resin pipe P is provided at the tip of a handle body, and a swinging cutting blade 5 is provided so as to face the receiving portion 3. The cutting blade 5 has a surface 5a inclined on only one side, and the receiving portion 3 on the opposite side of the inclined surface 5a is widened. It is preferable that the cutting blade 5 is a V-shaped blade with a center protruding.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to an improvement of a soft resin pipe cutting tool used for cutting a soft resin pipe such as a polyethylene pipe.

[0002]

[Prior art]

 As a soft resin pipe cutting tool, a soft resin pipe cutting tool has been conventionally used in which a receiving portion is provided at the tip of a handle body and an oscillating cutting blade is provided so as to face the receiving portion. FIG. 4 shows the cutting state, in which the soft resin pipe P 1 supported by the receiving portion 21 is cut by a cutting blade 22 having a V-shaped cross section and inclined surfaces on both sides.

However, in the conventional soft resin pipe cutting tool, the soft resin pipe P is cut while being expanded in a wedge shape by the cutting blade 22 having a V-shaped cross section and having inclined surfaces on both sides. 4, the soft resin pipe P is easily bent in both directions at the receiving portion 21. As a result, the cut surface of the soft resin pipe P may be slanted or corrugated, and there is a problem that fusion bonding is incomplete particularly in the case of a polyethylene pipe for electrofusion bonding.

[0004]

[Problems to be solved by the device]

 The present invention has been made to solve the above-mentioned conventional problems and provide a soft resin pipe cutting tool that can easily cut a soft resin pipe such as a polyethylene pipe in a plane perpendicular to the axis. It is a thing.

[0005]

[Means for Solving the Problems]

 The soft resin pipe cutting tool of the present invention made to solve the above problems is a soft resin pipe provided with a receiving portion for the soft resin pipe at the tip of the handle main body and a swinging cutting blade facing the receiving portion. The resin pipe cutting tool is characterized in that the cutting blade has a surface inclined only on one side, and the receiving portion on the opposite side of the inclined surface is widened.

[0006]

[Action]

 According to the soft resin pipe cutting tool of the present invention, the soft resin pipe is placed on the receiving portion at the tip of the handle body and is cut by the cutting blade having the inclined surface on only one side. Therefore, the side opposite to the inclined surface of the cutting blade is used. The soft resin pipe is cut in a plane perpendicular to the axis without being expanded laterally. Therefore, even if electrofusion bonding is performed, complete fusion bonding is possible.

[0007]

【Example】

 Hereinafter, the present invention will be described in more detail with reference to the illustrated embodiments. In FIGS. 1 and 2, reference numeral 1 is a handle body, 2 is a head portion thereof, and 3 is a receiving portion for a soft resin pipe P provided at a front end of the head portion 2. As shown in FIG. 3, the receiving portion 3 has a slit 4 in the center.

Reference numeral 5 denotes a cutting blade pivotally attached to the head 2 by a shaft 6. The rear surface of this cutting blade 5 has an arc shape centered on the shaft 6, and a ratchet 7 is formed. Reference numeral 8 is a handle which can be opened and closed centering on a shaft 9 and is provided with a feed claw 10. Reference numeral 11 is a return prevention claw attached to the shaft 9.

The cutting blade 5 has a surface 5a inclined only on one side, as shown in the cross section of FIG. Further, the cutting blade 5 is preferably a V-shaped blade having a center protruding as shown in FIG. The receiving portion 3 described above is widened on the opposite side of the inclined surface 5a in the axial direction of the soft resin pipe P. The slit 4 of the receiving portion 3 has a width that allows the cutting blade 5 to enter.

In order to cut the soft resin pipe P using the soft resin pipe cutting tool configured as described above, the soft resin pipe P is placed on the receiving portion 3 and the handle 8 is opened and closed as shown in FIG. . When the handle 8 is closed, the feed pawl 10 engages with the ratchet 7 to rotate the cutting blade 5 counterclockwise by one tooth, and when the handle 8 is opened, the return prevention pawl 11 holds the cutting blade 5 in that position. As it is, the feed pawl 10 gets over the tooth crest of the ratchet 7 and engages with the next tooth. By repeating this operation, the cutting blade 5 bites into the soft resin pipe P gradually and cuts as shown in FIG.

The above operation is the same as that of the conventional product, but in the present invention, the cutting blade 5 has the inclined surface 5a only on one side, and the receiving portion 3 on the opposite side of the inclined surface 5a is widened. There is. Therefore, the soft resin pipe P cut by the surface opposite to the inclined surface 5a of the cutting blade 5 is not spread laterally by the cutting blade 5 and is bent because the receiving portion 3 is widened. It never rises. As a result, the soft resin pipe P is cut at a plane perpendicular to the receiving portion 3. In this way, since the squareness and flatness of the cut surface are improved, perfect fusion bonding is possible.

Further, if the cutting blade 5 is a V-shaped blade having a protruding central portion as in the embodiment, the cutting edge first bites into the center of the soft resin pipe P and the cutting progresses. The deformation of the soft resin pipe P is reduced, and the perpendicularity and flatness of the cut surface can be further improved.

[0013]

[Effect of device]

 As described above, the soft resin pipe cutting tool of the present invention has the cutting blade having the inclined surface only on one side, and the receiving portion on the opposite side of the inclined surface is widened, so that the soft resin The squareness and flatness of the cut surface of the pipe can be improved. For this reason, there is an advantage that complete fusion can be achieved when fusion-bonding the cut surfaces of the soft resin pipe.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a soft resin pipe cutting tool according to an embodiment at the start of cutting.

FIG. 2 is a cross-sectional view of the soft resin pipe cutting tool of the embodiment at the end of cutting.

FIG. 3 is a sectional view of a cutting blade according to an embodiment.

FIG. 4 is a cross-sectional view of a conventional cutting blade.

[Explanation of symbols]

 1 Handle body 2 Head of handle body 3 Receptacle for soft resin pipe 4 Slit 5 Cutting blade 5a Cutting blade inclined surface 6 Axis 7 Ratchet 8 Handle 9 Axis 10 Feeding claw 11 Return prevention claw P Soft resin tube

Claims (2)

[Scope of utility model registration request] 1. A soft resin pipe cutting tool having a handle for a soft resin pipe at the tip of the handle body and an oscillating cutting blade facing the receiving portion, wherein the cutting blade is inclined only on one side. A soft resin pipe cutting tool characterized by having a surface and widening the receiving portion on the opposite side of the inclined surface. 2. The soft resin pipe cutting tool according to claim 1, wherein the cutting blade is a V-shaped blade having a center protruding.