JPH10328441A - Cutter for corrugated tube made of synthetic resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutter capable of surely and efficiently cutting entire periphery of a mountain part at the prescribed place of a corrugate tube made of synthetic resin elliptic in cross section obtained by coating a pipe with synthetic resin. SOLUTION: A cutter main body 1 is provided with an insertion port 5 and an accepting hole 4 and provided with inserting grooves 6a and 6c for guiding the mountain part of the corrugate tube to a center part between opposed tip faces at this port 5 and the inner peripheral surface of the hole 4. Cutter plates 7 with first cutting blades 8 projecting from the center of the tip parts of the grooves 6a provided on the port 5 and second cutting blades projecting from the center of the tip parts of the grooves 6c provided on the side of the hole 4 are mounted to the right and left sides of the main body 1 in the state of being exchangeable. The corrugate tube is inserted to the portion 5 to cut the mountain parts of both side wall parts of the tube and then the main body 1 is rotated around the corrugate tube by 90 deg. to continuously cut off the mountain parts of both tip curved wall parts of the tube by the blade 8 of one cutter plate 7 and the blade 9 of the other cutter plate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a cutter for cutting a synthetic resin corrugated pipe covering pipes and wiring.

[0002]

2. Description of the Related Art For example, when piping for heating is performed in a building,
A hot water pipe and a hot water pipe are built in a synthetic resin corrugated pipe together with wiring, and a part of the corrugated pipe is cut off as necessary during piping work to expose the hot water pipe and the like. . As a tool for cutting off such a corrugated pipe, for example, a cutter as described in Japanese Utility Model Application Laid-Open No. 160869/1986 is employed.

As shown in FIG. 10, the above-mentioned cutter is provided with a corrugated pipe insertion opening 22 and a corrugated pipe receiving hole 23 in a main body 21 which is formed by laminating two metal plates and integrally fixing them. The first cutting blades 24, 24 and the second cutting blades 25, 25 project from the left and right facing surfaces of the mouth 22 and the receiving port 23, respectively.
Further, it has a structure in which a small-width locking strip 26 protrudes inward from the opposing surface of the corrugated tube insertion port 22 and the inner peripheral edge of the receiving port 23.

[0004] Then, the corrugated pipe C is connected to both side walls thereof.
Insertion port 22 with C ₁ , C ₁ facing the first left and right cutting edges 24, 24.
First mountain portion of the side walls C _1, C ₁ by plugging in
The main body 21 is rotated in the circumferential direction with respect to the corrugated pipe C that has reached the inside of the receiving hole 23 by cutting with the cutting blades 24, 24. The semicircular curved wall portions C ₂ and C ₂ are configured to cut off the peaks.

[0005]

However, according to the cutter described above, after the side walls C ₁ , C ₁ of the corrugated pipe C are cut by the first left and right cutting edges 24, 24, the main body 21 is moved around the corrugated pipe. , So that the left and right second cutting blades 25 and 25 respectively face the ends of the semicircular curved walls C ₂ and C ₂ at both ends of the corrugated pipe C. Thereafter, the main body 21 is further rotated in the same direction. In order to cut the semicircular curved wall portions C ₂ and C ₂ by moving the main body 21, it is necessary to rotate the main body 21 from the front of the corrugated pipe 21 to the back side by 130 degrees, and therefore, When it is desired to cut a predetermined portion of the corrugated pipe C which has been piped, there is a problem that the cutting operation may not be performed when there is almost no gap on the back side of the corrugated pipe C.

In addition, due to such workability, a relatively long handle cannot be integrally provided on the main body 21, and the operator directly grips the main body 21 to perform the cutting operation of the corrugated pipe C. In addition, in order to move the hand holding the main body 21 to the back side of the corrugated pipe C, operability and workability are difficult.

The left and right second cutting blades 25, 25 projecting from the facing surface of the corrugated pipe receiving hole 23 are provided with one of the cutting blades 25.
A blade is provided on the upper edge side of the
By rotating the body 21 in one direction with respect to the corrugated pipe C, the semicircular curved wall portions C ₂ and C ₂ of the corrugated pipe C are cut, so that the main body 21 is rotated in the other direction. However, there is a problem that it cannot be cut, and the usability is poor.

Further, when the corrugated pipe C is inserted into the corrugated pipe insertion port 22, the locking strip 26 projecting from the opposing surface is received on one side wall surface of the valley of the corrugated pipe C. And the left and right first cutting blades 2 using the locking strip 26 as a guide.
Although the side walls C ₁ , C ₁ of the corrugated pipe C are cut by 4 and 24, the other side wall surfaces of the valleys of the corrugated pipe C are inserted into the receiving holes 23 because none of them is received. In the case where the main body 21 is vertically twisted with respect to the corrugated pipe C with the locking strip projecting from the connecting portion between the insertion opening 22 and the receiving hole 23 as a fulcrum, and the cutting blade may be damaged. Become.

Furthermore, since the first and second cutting blades 24 and 25 are formed separately and are irremovably clamped to the main body 1, they cannot be replaced and even one cutting blade is cut due to a defect or the like. When darkness occurs, there is a problem that the entire cutter cannot be used.

The present invention has been made in view of the above problems, and has as its object to continuously and accurately cut a semicircular curved wall from both side walls of a corrugated pipe at a small operation angle. Another object of the present invention is to provide a synthetic resin corrugated pipe cutter which can be replaced and interchangeable.

[0011]

In order to achieve the above-mentioned object, the invention according to claim 1 is a combination of an elliptical cross-section in which semicircular curved walls are integrally provided at both ends of both side walls. A cutter for cutting a resin corrugated pipe, wherein the cutter body is provided with an enlarged flat-plate-shaped head at the tip of a handle, and the corrugated pipe is rotatable at the center of the enlarged head of the cutter body. A corrugated pipe receiving hole having a width that allows insertion between the side walls of the corrugated pipe from the receiving hole and a corrugated pipe insertion opening that is open at the distal end surface of the enlarged head; Further, first cutting blades for cutting the ridges of both side walls of the corrugated pipe project from opposite surfaces of a continuous portion of the insertion port and the corrugated pipe receiving hole, and the corrugated pipe is cut from these cutting edges. Above the connector facing the insertion direction A second cutting blade for cutting the peak of the curved wall portion of the corrugated pipe is provided on the inner peripheral surface of the gate pipe receiving hole, and the cutter body is rotated around the corrugated pipe inserted into the receiving hole. The first and second cutting blades moving in the direction of the curved wall of the corrugated pipe are configured to simultaneously cut the ridges of the curved wall at both ends.

[0012] The invention according to claim 2 relates to the shape of the cutter body and the cutting blade in the above invention, wherein the cutter body comprises two main body halves each having a handle portion piece and an enlarged head piece. The first and second cutting blades are formed on both ends of an inner edge of a metal cutter plate having a certain thickness, and are formed on protrusions protruding outward at both ends of the metal cutter plate having a certain thickness. The two metal plates are interposed between the opposing surfaces of the two main body halves of the front and back sides, and are detachably fixed by bolts and nuts.
The corrugated pipe has a structure in which a corrugated pipe fitting groove is provided on the entire length of the edge of the corrugated pipe insertion opening and the inner peripheral edge of the receiving hole between the left and right second cutting blades on the opposing surfaces of the two main body halves.

According to a third aspect of the present invention, in the first and second aspects of the invention, the inner edge of the cutter plate extends along the inner peripheral edge of the corrugated pipe receiving hole provided in the cutter body. The V-shaped first and second cutting edges are formed at both ends of the concave arc-shaped inner edge so as to protrude from the receiving hole beyond the thickness of the peak portion of the corrugated pipe. In addition, each of the first and second cutting edges is formed with an intermediate cutting edge on the concave arc-shaped edge.

[0014]

According to the first aspect of the present invention, when the corrugated pipe insertion port of the cutter body is inserted into the corrugated pipe such that both side walls of the corrugated pipe are along the opposing surfaces of the insertion port, the corrugated pipe can be left and right. The first cutting edge can cut the crests of the side walls of the corrugated pipe, and immediately after cutting the crests of the corrugated pipe, the semicircular curved wall on the insertion side of the corrugated pipe has the above-mentioned insertion opening in the receiving hole. Is received by the peripheral portion in the extension direction of At this time, the left and right first cutting blades are protrudingly provided at the connecting portion between the corrugated pipe insertion opening and the receiving hole, while the left and right second cutting blades are formed on the inner periphery of the receiving port facing the corrugated pipe insertion direction. Since the projections are provided on the surface, the ridges on both side walls of the corrugated pipe are cut off by the first left and right cutting blades, and then the cutter body is rotated around the corrugated pipe, whereby either one of the first cutting blades is cut. With the other second cutting edge, the ridges of the curved walls at both ends of the corrugated pipe are connected to the cutting operation of the both side walls, that is, one first cutting edge obtained by cutting the side wall of the corrugated pipe is used. Efficient cutting can be performed while maintaining the cut state without detaching from the side wall portion.

In this case, if the cutter body is rotated to the left around the corrugated pipe, the first cutting edge on the right and the second cutting edge on the left
The curved walls at both ends of the corrugated pipe can be cut at the same time by the cutting blade, and by rotating the cutter body rightward around the corrugated pipe, the first cutting blade on the left and the second cutting blade on the right can be cut. Thereby, the curved walls at both ends of the corrugated pipe can be cut at the same time. Therefore, the corrugated pipe can be cut even if the cutter body is rotated in any direction and even if the cutter body is used in a state where the cutter body is turned upside down.

Furthermore, after cutting both side walls of the corrugated pipe by the first left and right cutting blades of the cutter body, the cutter body is rotated to continuously form curved walls on both ends connected to both side walls of the corrugated pipe. Since the cutter is to be cut, the turning operation angle of the cutter body is about 90 degrees. Therefore, when the corrugated pipe is already piped and there is almost no gap on the back side, the corrugated pipe is reliably cut. In addition, even if the handle portion of the cutter body is formed to be relatively long, no obstruction occurs, and the handle portion of the corrugated pipe is gripped while the cutter body is lightly operated. The cutting operation can be performed smoothly.

According to the invention of claim 2, the cutter body is formed by connecting two body halves, while the first body is connected to the first body half.
And the second cutting blade is formed on one cutter plate, and the cutter plate is interposed between the two main body halves and fixed by bolts and nuts.
If at least one of the first and second cutting blades is cut off, the cutter plate can be easily replaced by removing the bolts and nuts.
The corrugated pipe is completely inserted because the corrugated pipe is completely fitted with the corrugated pipe in the entire length of the corrugated pipe insertion opening between the opposing surfaces of the body halves and the inner peripheral edge of the receiving hole between the left and right second cutting blades. Until it is cut, it can be always supported by either the fitting groove or the inner edge of the cutter plate protruding toward the receiving hole.

Accordingly, the cutting operation can be performed accurately and smoothly using the fitting groove and the cutter plate as a guide without rattling or falling out of the cutter body, and the central portion of the peak of the corrugated pipe is entirely formed by the cutting blade. When cut along the circumference, half of the peak is automatically removed, so that the cutter plate holding the half is disengaged and the cutter body is removed from the corrugated pipe. It is easy to do.

According to the third aspect of the present invention, the first and second cutting edges are formed at both ends of the inner edge of the cutter plate with a length interval of the side wall of the corrugated pipe. As a result, the cutter plate can be shared on either the left or right side of the cutter body, and the first cutting edge can be used as the second cutting edge and the second cutting edge can be used as the first cutting edge by inverting the cutter plate. Therefore, even if one of the cutting edges is broken, the cutter plate can be turned over and used for cutting the corrugated pipe.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a metal plate cutter in which an enlarged head 2 is integrally formed at the tip of a handle 3 having a predetermined length. In the main body, the enlarged head 2 is formed in a disk shape and has a receiving hole 4 having a size capable of receiving a synthetic resin corrugated tube C to be cut in a central portion thereof in a central portion thereof over the front and back surfaces. The corrugated pipe C has a width capable of being inserted between the straight side walls C ₁ and C ₁ from the peripheral edge of the receiving hole 4 to the distal end surface of the enlarged head 2. The communicating insertion port 5 is formed.

As shown in FIGS. 2 and 3, the corrugated pipe C has semicircular curved wall portions at both ends of both side walls C ₁ and C _1.
C _2, C ₂ have a structure in which the mountain portion C ₃ and valley portions C ₄ is continuously formed alternately with a constant width in the longitudinal direction with being formed into cross-sectional oval shape having integrally provided with doing.

A receiving hole 4 provided at the center of the enlarged head 2 of the cutter body 1 has a circular arc-length portion substantially equal to the width of the insertion port 5 at a base end side peripheral edge opposed to the insertion port 5. arcuate edges 4a of the receiving the curved wall portion C ₂ of the corrugated tube C over
And an insertion port 5 from both ends of the arc edge 4a.
The left and right circular arc portions reaching the straight opposing end surfaces 5a, 5a parallel to each other are formed into arc edges 4b, 4b to which the crests of the curved wall portions C ₂ , C ₂ at both ends of the corrugated pipe C can slide. Has formed.

The left and right straight facing end surfaces 5a, 5a of the insertion slot 5 are also provided.
In the center of the corrugated pipe C on both sides
First fitting grooves 6a, 6a into which ridges of C ₁ and C ₁ are slidably fitted.
And the second fitting grooves 6b, 6b are provided at the center of the distal ends of the left and right circular edges 4b, 4b of the receiving hole 4 in communication with the base ends of the first fitting grooves 6a, 6a. And
A third fitting groove 6c is formed at the center of the arc edge 4a on the base end side of the receiving hole 4. These second and third fitting grooves 6b, 6c
The second with crest C ₃ of the corrugated tube C has a width which is fitted slidably, third insertion groove 6b, the left and right arcuate edge 4b between 6c, the 4b fitting groove provided Absent.

The cutter body 1 configured as described above is
As shown in FIG. 5, two main body halves 1a and 1b having the same shape and a constant thickness are superposed and fixed integrally, and these main body halves 1a and 1b are connected as shown in FIG. A handle portion piece 3 'for forming the handle portion 3 and an enlarged head piece 2' for forming an enlarged head portion 2 having the receiving hole 4 and the insertion opening 5; When the main body halves 1a and 1b are overlapped at predetermined positions on the facing surfaces of the straight edge and the arc edge for forming the insertion port 4 and the insertion port 5, respectively,
L-shaped notch for forming the third fitting grooves 6a to 6c
6a 'to 6c' are provided.

Further, several bolt mounting holes 11 are formed in the enlarged head piece 2 'at regular intervals, and the main body half 1
The cutter body 1 is formed by integrally fixing the handle pieces 3 ', 3' to each other via a spacer having a constant thickness between the handle pieces 3 ', 3' of a and 1b, and the cutter body 1 is formed and a small interval is provided. Then, a cutter plate 7 described later is detachably interposed between the opposing surfaces on the left and right sides of the opposing enlarged head pieces 2 ′, 2 ′, and the bolt mounting holes 11 are connected to each other with bolts and nuts 13. The plate 7 is mounted.

The cutter plate 7 is curved in an arch shape along the left and right shapes curved in an arc shape of the enlarged head 2.
The curved arc length of the inner edge is provided from the base end of the straight inner end of the receiving hole 4, which is a continuous portion of the receiving hole 4 and the insertion port 5, to the inner peripheral edge of the base end of the receiving hole 4. A bolt insertion hole 12 is formed at the same length as the bolt mounting hole 11 in the length direction, as shown in FIG.

Further, when the cutter plate 7 is interposed between the enlarged head pieces 2 ′ and 2 ′, and the bolt insertion hole 12 is aligned with the bolt mounting hole 11 and fixed by the bolt / nut 13. , is projected from the receiving hole 4 side with a depth below the projecting width curved inner edge over the entire length reaching the bottom of the valley above thick mountain portion C ₃ meat of the corrugated tube C of the cutter plate 7 And the both ends of the curved inner edge and the edges 7 on the distal end side and the proximal end side of the cutter plate 7.
A first cutting edge 8 and a second cutting edge 9 each having an acute V-shaped end are formed together with the inner ends of a and 7b. The first cutting edge 8 and the second cutting edge 9 have both sharp edges formed on the cutting edge, and the curved inner edge between the cutting edges 8 and 9 is formed as an intermediate cutting edge over the entire length. Formed in 10.

The cutter plates 7, 7 formed as described above
As described above, the cutter is inserted into the gap between the left and right facing end faces of the enlarged head pieces 2 ′, 2 ′ of the front and back two main body halves 1 a, 1 b and clamped by the bolts / nuts 13, whereby the cutter is formed. Assembled, when assembled in this manner, the first cutting edges 8 of both cutter plates 7, 7 are straight opposed end faces 5 a of the insertion slot 5.
And projecting toward the receiving hole 4 in a state facing the continuous portion of the receiving hole 4 and the arcuate edge 4b of the receiving hole 4, and the second cutting edge 9 connects these left and right first cutting edges 8, 8 to the corrugated pipe C. The receiving hole 4 faces the receiving hole 4 from both left and right ends of the arc edge 4a of the receiving hole 4 facing the insertion direction.

In order to cut a desired portion of the corrugated pipe C formed by covering the hot water supply pipe and the wiring with the cutter constructed as described above, the handle 3 of the cutter body 1 is gripped and the insertion port 5 is inserted directly. Opposite end faces 5a, 5a are on both side walls of corrugated pipe C
After inserting the insertion port 5 into one side of C ₁ , C ₁
When inserted into one end of C ₁ , C _1, the corrugated pipe C to be cut into the first fitting grooves 6 a, 6 a provided on the facing surface of the insertion opening 5.
Crests C ₃ first cutting edge 8,8 as well as fitting bite into the top center of the該山part C ₃ of.

In this state, when the cutter body 1 is pushed toward the other ends of the side walls C ₁ , C ₁ of the corrugated pipe C using the peaks C ₃ as a guide, the corrugated pipe C is brought into contact with the side walls C ₁ , C. ₁
Entering from the insertion slot 5 the cutter body 1 in the receiving hole 4 while being toward the crest C ₃ of the other end cutting by the first cutting edge 8,8. As shown in FIG. 3, the cutter body 1 is further pushed in, and the first cutting blades 8, 8 form both side walls of the corrugated pipe C.
When C _1, cutting the ridges C ₃ of C ₁ over the entire length, one end semicircular curved wall C ₂ of the corrugated tube C is catch by proximal side arc edge 4a of the receiving hole 4.

[0031] The keep this state, the other end of the first cutting edge 8, 8 and the corrugated tube C bite into the joint portion between the curved wall portion C ₂ of the side wall portions C ₁ and the other end side of the corrugated tube C with Gawayama portion C ₃ maintains the state fitted to the second fitting groove 6b, one end curved wall C ₂ of the corrugated tube C is close to or in contact with the second cutting edge 9, 9 and the curved crests C ₃ of the wall C ₂ are in a state fitted to the third fitting grooves 6c, the corrugated tube C is receiving hole 4
And is held without rattling in the receiving hole 4 without detaching from the receiving hole 4.

Further, from this state, when the cutter body 1 is rotated around the corrugated pipe C, for example, rotated leftward as shown in FIG. 4, the second and _third peaks C3 of the corrugated pipe C are formed. The first cutting edge 8 of the right cutter plate 7 and the second cutting edge 9 of the left cutter plate 7 while sliding the fitting grooves 6b and 6c.
The corrugated pipe C has curved walls C _{2 at} both ends and a crest C _{3 at} C _2.
The center of is cut off. At this time, the intermediate cutting edge 10 between the two cutting edges 8 and 9 is engaged with the cut portion to prevent the corrugated pipe C from being deflected and to guide the intermediate cutting edge 10 to bend both ends of the corrugated pipe C. The walls C ₂ and C ₂ are cut.

When the curved wall portions C ₂ , C ₂ at both ends of the corrugated pipe C reach the left and right circular arc edges 4 b, 4 b of the receiving hole 4, that is, when the cutter body 1 is rotated leftward by 90 degrees, First,
The second cutting edges 8, 9 are curved wall portions C ₂ , C _{2 at} both ends of the corrugated pipe C.
, The curved wall portions C ₂ , C ₂ at both ends are completely cut, so that the peak portion C ₃ of the corrugated pipe C is cut over the entire circumference.

In the position where the corrugated pipe C is completely cut in this way, the curved wall portions at both ends of the corrugated pipe C are provided.
The peaks C ₃ of C ₂ , C ₂ are in contact with the left and right circular edges 4b, 4b of the receiving hole 4 where the fitting grooves do not exist due to being disengaged from the second and third fitting grooves 6b, 6c. because the corrugated pipe C via the intermediate cutting edge 10 which is engageably inserted in central該山portion C ₃ is separated longitudinally from the cut surface can be removed easily from the corrugated tube C cutter.

When cutting the curved wall portions C ₂ , C ₂ at both ends of the corrugated pipe C, the cutter body 1 is turned around the corrugated pipe C to the left as described above, but is turned to the right. It can be cut even if it is moved. In this case, both side walls of the corrugated pipe C are formed by the first left and right cutting edges 8 and 8.
C _1, After the ridges C ₃ of C ₁ is cut along the entire length, rotates the cutter body 1 in the right direction, the mountain portion C ₃ of the corrugated tube C
While the second and third fitting grooves 6b, 6c are slid, the first cutting edge 8 of the left cutter plate 7 and the second cutting edge 9 of the right cutter flat 7 both end curved walls C _{2 of the} corrugated pipe C. ,
In which the central portion of the crest portion C ₃ of the C ₂ is cut.

First cutting edge 8 provided on cutter plate 7
Alternatively, when the second cutting edge 9 is cut or broken, the bolt / nut 13 to which the cutter plate 7 is fixed can be removed and replaced from the main body half 1a, 1b of the cutter body 1 by replacement. Although the first cutting edge 8 and the second cutting edge 9 provided on the cutter plate 7 have their protruding ends formed as sharpened ends, as shown in FIGS. May be formed in a trapezoidal shape cut in the length direction of the cutter plate 7. In this case, a straight leading edge and both sides connected to the leading edge are formed on the blade edge. Other shapes and the state of being attached to the cutter body 1 are the same as those of the above-described embodiment, and therefore, the same reference numerals are given and the description is omitted.

[Brief description of the drawings]

FIG. 1 is a front view of a cutter,

FIG. 2 is a simplified side view of a state where a corrugated pipe is cut;

FIG. 3 is a longitudinal sectional front view showing a state where both side walls of the corrugated pipe are cut off;

FIG. 4 is a longitudinal sectional front view of the corrugated pipe in which both curved walls are cut off;

FIG. 5 is an enlarged longitudinal sectional view of a main part in a state where the corrugated pipe is cut;

FIG. 6 is a front view of a main body half,

FIG. 7 is a front view of a cutter plate,

FIG. 8 is a front view of a cutter plate having cutting blades of another shape,

FIG. 9 is a front view of a cutter on which the cutter plate is mounted,

FIG. 10 is a simplified front view of a state in which a corrugated pipe is cut by a conventional cutter.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Cutter main body 1a, 1b Main body half piece 2 Enlarged head 3 Handle part 4 Receiving hole 5 Insertion opening 6a-6c Insertion groove 7 Cutter plate 8 First cutting edge 9 Second cutting edge 10 Intermediate cutting edge 13 Bolt / nut C Corrugated pipe C ₁ Side wall C ₂ Curved wall

Claims (3)

[Claims] 1. A cutter for cutting a synthetic resin corrugated pipe having an elliptical cross-section, in which semi-circular curved walls are integrally provided at both ends of both side walls, wherein the cutter body is biased toward a tip of a handle. A flat plate-shaped enlarged head is provided, and a corrugated pipe receiving hole of a size that allows the corrugated pipe to rotate is provided at the center of the enlarged head of the cutter body, and the corrugated pipe is inserted from the receiving hole. A corrugated pipe insertion opening is provided at the distal end surface of the enlarged head with a width that allows insertion between the side wall sections, and further, on an opposing surface in a continuous portion between the insertion port and the corrugated pipe receiving hole. First cutting blades for cutting the ridges of both side walls of the corrugated pipe protrude, and the corrugated pipe is bent from the cutting edges to the inner peripheral surface of the corrugated pipe receiving hole facing in the direction of insertion of the corrugated pipe. Cut off wall peaks A second cutting edge protrudes, and the first and second cutting edges move in the direction of the curved wall portion of the corrugated pipe by rotating the cutter body around the corrugated pipe inserted into the receiving hole. A synthetic resin corrugated tube cutter characterized in that the crests are cut at the same time. 2. The cutter body according to claim 1, wherein the front and back body halves each forming a handle piece and an enlarged head piece are overlapped and integrally connected, while the first and second cutting blades are provided. The metal cutter plate having a certain thickness is formed at both ends of an inner edge thereof with protrusions protruding outward, and two metal plates are provided on both sides of the main body half of the front and back. Between the corrugated tube insertion opening and the receiving hole between the left and right second cutting blades on the opposing surfaces of the two main body halves. 2. A corrugated pipe having a crest fitting groove provided in a peripheral portion thereof.
Synthetic resin corrugated pipe cutter described in 3. An inner edge of the cutter plate is formed as a concave arc-shaped edge protruding along the inner peripheral edge of the corrugated pipe receiving hole provided in the cutter main body from the receiving hole to a thickness equal to or greater than the thickness of a peak of the corrugated pipe. The V-shaped first and second cutting edges are formed at both ends of the concave arc-shaped inner edge with a length interval of the side wall portion of the corrugated pipe, and are formed on the concave arc-shaped edge. The cutter for a corrugated pipe according to claim 1 or 2, wherein an intermediate cutting edge that is continuous with the first and second cutting edges is formed.