JPH09117818A - Corrugate tube cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a cut surface uniform and to prevent damaging of a wire harness by the cut surface by providing a cutting blade having a blade part for cutting cut starting holes formed in both sides of a tip part to both side of a peak part in the peripheral direction. SOLUTION: The tip part 35a of a pressed down cutting blade 29 is thrust into a peak part P between groove parts Q engaged with supporting parts 43 and 45, cut starting holes are formed and by further pressing down the cutting blade 29, both sides of the peak part P in a peripheral direction are cut by a blade part 35 and a corrugate tube T is cut to a desired length L. Thus, since the corrugate tube T is surely cut in the peak part P and the production of edges in a cut surface is made difficult, a uniform cut surface form is obtained and damaging of a wire harness to be inserted by the cut surface is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrugated tube cutting device.

[0002]

2. Description of the Related Art Conventionally, when wiring a wire harness to a vehicle or the like, the wire harness is inserted through a corrugated tube T at a place where interference with other wire harnesses is expected, a place where rain or mud is covered, or the like. The method of coating protection is widely used.

FIG. 8 is a perspective view showing a conventional corrugated tube cutting device.

As shown in FIG. 1, the cutting device 1 has an upper surface 3
The base 3 on which the corrugated tube T is placed and the cutting blade 5 for cutting the corrugated tube T are provided in a.
One end of the cutting blade 5 is rotatably attached to the side surface 3b of the base via a shaft portion 7. A straight blade 9 for cutting the corrugated tube T mounted between the cutting blade 5 and the side surface 3b of the base is formed in the middle portion of the cutting blade 5, and the cutting blade 5 is formed at the other end.
A grip portion 11 is provided to be gripped when pushing down the corrugated tube T from above. The tip Ta of the corrugated tube T is abutted against the upper surface 3a of the base plate, and the positioning member 1 having a substantially L-shaped cross section that regulates the cutting length to a predetermined length.
3 are provided. The positioning member 13 has a long hole 15 formed on the upper surface 3a of the base to allow the cutting length to be freely changed.
It is fastened and fixed by a bolt 17.

The corrugated tube T is cut by placing the corrugated tube T on the upper surface 3a of the base, abutting the tip Ta of the corrugated tube T against the positioning member 13, pressing the corrugated tube T, and pressing the cutting blade 5 from above. Push down. As a result, the corrugated tube T is cut into a desired length.

[0006]

However, in the conventional cutting device shown in FIG. 8, the corrugated tube T is cut by the ridge P, the groove Q (see FIG. 9), or the ridge. The cut portion Tb was not uniform in shape, such as being cut diagonally from the portion P to the groove portion Q (see FIG. 10), which was not preferable in appearance.

Further, since the corrugated tube T is cut off by cutting, as shown in FIGS. 9 and 10, the edge E may be formed at the cut portion Tb, and the edge E is formed at the groove portion Q. Then, the inserted wire harness W may interfere with the edge E and damage the wire harness W.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a corrugated tube cutting device which can obtain a uniform cut surface shape and which does not damage the wire harness at the cut surface.

[0009]

According to a first aspect of the present invention, there is provided a support portion which engages with and supports a groove portion of the corrugated tube at two positions separated in the longitudinal direction of the corrugated tube, and a support portion supported by the support portion. Of the corrugated tube that penetrates into the crests between the grooves and forms cutting start holes in the crests, and blades that are formed on both sides of the tip and cut out from the cutting start holes on both sides in the circumferential direction of the crests. And a cutting blade having a section.

According to the first aspect of the invention, when cutting the corrugated tube, the supporting portion is engaged with the two groove portions of the corrugated tube which are separated from each other, the corrugated tube is supported by the supporting portion, and the cutting blade is on the corrugated tube side. Push down. As a result, a piercing cutting start hole is formed in the mountain portion between the groove portions where the tip portion of the cutting blade engages with the support portion, and by further pushing down the cutting blade, the blade portion causes a circumferential direction of the mountain portion from the cutting start hole. Since both sides are cut open, the corrugated tube is surely cut at the crests, and edges are unlikely to occur on the cut surface.

A second aspect of the present invention is the corrugated tube cutting device according to the first aspect, wherein the supporting portions are provided on both sides of the cutting blade, and closer to the corrugated tube than the cutting blade. It is characterized in that it is movable from a protruding position to a retracted position on the side opposite to the corrugated tube where the cutting blade is exposed, and is biased to the protruding position.

In the invention as set forth in claim 2, when the corrugated tube is cut, the supporting portions urged to the projecting position are engaged with the two groove portions of the corrugated tube which are separated from each other, and the corrugated tube is supported by the supporting portion. , Push the cutting blade down to the corrugated tube side. As a result, the supporting portion moves toward the retracted position, the cutting blade is exposed from between the supporting portions, and the tip of the exposed cutting blade is pierced into the mountain portion between the grooves engaged with the supporting portion to start cutting. A hole is formed, and by further pushing down the cutting blade, the blade portion cuts open both sides in the circumferential direction of the mountain portion from the cutting start hole. Therefore, claim 1
In addition to the operation of the invention described in (1), during cutting, since the supporting portion always supports the tip of the cutting blade and the vicinity of the blade, the corrugated tube is less likely to be displaced during cutting, and a more uniform cutting can be achieved. The surface shape can be obtained.

A third aspect of the present invention is the corrugated tube cutting device according to the first or second aspect, wherein the support portion is a groove portion on both sides adjacent to one crest portion of the corrugated tube. It is characterized by engaging with.

According to the invention described in claim 3, in addition to the function of the invention described in claim 1 or 2, since the support portion engages with the groove portions on both sides adjacent to one mountain portion, the corrugated tube is provided. Can be more reliably cut at the mountain portion.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment according to the invention described in claim 1 or claim 3 will be described below with reference to FIGS.

FIG. 1 is a perspective view showing a corrugated tube cutting device according to a first embodiment, FIG. 2 is a perspective view of a cutting blade shown in FIG. 1, and FIG. 3 is a sectional view showing an essential part of FIG.

As shown in FIG. 1, the cutting device 21 has a base 23 on which a corrugated tube T is placed on an upper surface 23a.
And a plate-shaped cutting blade 2 for cutting the corrugated tube T
Arm member 25 to which 9 is fixed and two support jigs 4
3, 45 and.

One end of the arm member 25 has a base side surface 23.
b is rotatably attached to the cutting blade 2 via the shaft 27.
9 is formed in a substantially mountain shape having a tip portion 35a that sharply protrudes in the substantially center and blade portions 35 formed on both sides of the tip portion 35a (see FIG. 2), and is fixed to a middle portion of the arm member 25 with a screw 33. ing. Further, the other end of the arm member 25 is provided with a grip portion 31 that is gripped when the cutting blade 29 is pushed down from above the corrugated tube T.

On the upper surface 23a of the base plate, there is provided a positioning member 37 having a substantially L-shaped cross section, which abuts the tip Ta of the corrugated tube T and regulates the cutting length L to a desired length. The positioning member 37 has bolts 4 in the long holes 39 formed in the upper surface 23a of the base in order to change the cutting length L.
It is fastened and fixed by 1.

The two supporting jigs 43 and 45 are provided with a cutting blade 29.
The base member 23 is positioned so as to be positioned on both sides of the cutting blade 29 while the arm member 25 is pushed down toward the base plate 23 so that the tip portion 35a of the base plate pierces the surface of the corrugated tube T.
Is erected on the bottom surface 23c of the recess, which is lowered from the top surface 23a of
The corrugated tube T mounted on the base surface 23a is supported from below.

Both supporting jigs 43 and 45 are substantially U-shaped supporting portions 47 and 49 which engage with the groove portion Q of the corrugated tube T.
And the base 23 extended from the U-shaped bottoms of the support portions 47 and 49.
Bases 51 and 53 supported by the bottom surface 23c of the recess. The base 51 of one of the support jigs 43 is the bottom surface 23 of the recess.
The base portion 53 of the other supporting jig 45 is directly fixed to c and is supported by the bottom surface 23c of the recess via the slide mechanism 55. The slide mechanism 55 is the base 5 of the other supporting jig 45.
The slide portion 57 fixed to the plate 3 and the slide fitting portion 59 that is slidably fitted along the longitudinal direction of the corrugated tube T on which the slide portion 57 is placed.
And an engaging groove 57a formed continuously with the slide portion 57
And a slide fixing portion 61 for restricting the sliding movement of the slide portion 57, which has a locking portion 61a for engaging with the slide portion 57, whereby the gap between the support portions 43 and 45 can be adjusted to a desired size. There is. The gap between the two support portions 43 and 45 is
It is set to the width of one mountain P of the corrugated tube T,
As a result, the corrugated tube T placed on the substrate upper surface 23a is supported from below by the support portions 47 and 49 that engage with the groove portions Q on both sides adjacent to the one mountain portion P.

When the cutting blade 29 is pushed down from above the corrugated tube T supported by the supporting portions 47 and 49, the tip portion 35a contacts the apex of the mountain portion P, and the blade portion 35 has the corrugated tube. It is provided so as to be substantially perpendicular to T. Further, the lateral width of the blade portion 35 of the cutting blade 29 is formed so as to cover a range wider than the outer diameter of the corrugated tube T. Thereby, the support portion 47,
When the arm member 25 is pushed down from above the corrugated tube T supported by 49, the tip portion 35 a of the cutting blade 29 is
Pierces the mountain portion P of the corrugated tube T to form a cutting start hole, and when further pushed down, the blade portion 35 cuts open both sides in the circumferential direction of the mountain portion P from the cutting start hole.

Next, the operation will be described.

To cut the corrugated tube T, the corrugated tube T is placed on the upper surface 23a of the base, and the tip Ta of the corrugated tube T is abutted against the positioning member 37,
The corrugated tube T is supported by engaging the support portions 43 and 45 with the two groove portions Q, and the corrugated tube T is pressed and the arm member 25 is pushed down from above.

As a result, the tip end portion 35a of the pushed down cutting blade 29 pierces the mountain portion P between the groove portions Q engaged with the support portions 43 and 45 (see FIG. 3), and a cutting start hole is formed. By further pushing down the cutting blade 29, the blade portion 3
The corrugated tube T is cut to a desired cutting length L by cutting and opening both sides of the mountain portion P in the circumferential direction from the cutting start hole by 5. Therefore, the corrugated tube T is surely cut at the mountain portion P, and an edge is unlikely to be generated on the cut surface, so that a uniform cut surface shape can be obtained and the inserted wire harness is damaged at the cut surface. Never.

Further, since the support portions 43 and 45 engage with the groove portions Q on both sides adjacent to the one mountain portion P, the corrugated tube T can be more reliably cut by the mountain portion P.

Next, a second embodiment according to the invention described in claim 2 will be described with reference to FIGS. 4 and 5.

FIG. 4 is a perspective view showing a corrugated tube cutting device according to a second embodiment, and FIG. 5 is a cross-sectional view of the main part of FIG. The same components as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIGS. 4 and 5, in the cutting device 65 of the second embodiment, the present invention is applied to a hand tool, and the supporting portions 75 and 77 are engaged with the groove portion Q of the corrugated tube T. Are provided on both sides of the cutting blade 29 so as to sandwich it.

The cutting device 65 is provided with two arm members 67 and 69 that intersect at substantially the center and a shaft portion 71 that pivotally supports both arm members 67 and 69 at the intersection point.
By gripping the one ends 67a, 69a of the 7, 69, the other ends 67b, 69b approach each other. A support recess 73 for supporting the outer peripheral surface of the corrugated tube T is formed on the inner surface of the other end portion 67b of the one arm member 67. A cutting blade 29 is provided on the inner surface of the other end 69b of the other arm member 69 facing the support recess 73. The cutting blade 29 is fixed to the other end 69b of the arm member 69, and the support recess 73 is formed with a slit 73a through which the cutting blade 29 is inserted while both arm members 67 and 69 are clamped.

A supporting member 81 is provided on the other end 69b of the other arm member 69. The support member 81 is
The arm member 69 is provided with a substrate portion 79 that comes into contact with the outer surface of the other end portion 69b, and two plate-shaped support portions 75 and 77 that stand upright from the substrate portion 79 and project through the arm member 69. There is. Both support portions 75, 77 penetrating the arm member 69
Is erected along the front and back surfaces of the cutting blade 29, and its tip portions 75a and 77a are one mountain portion P of the corrugated tube T.
Engage with the groove portions Q adjacent to both sides of. Both support parts 75, 7
7, one of the supporting portions 75 is fixed to the substrate portion 79,
The other supporting portion 77 has a gap P with the one supporting portion 75,
It is movably fastened and fixed by a bolt 85 inserted through an elongated hole 88 formed in the substrate portion 79 so as to be changeable according to the width of the. One support portion 75 fixed to the substrate portion 79 is inserted through the through hole 85 formed in the arm member 67.

The base plate portion 79 is connected to the other end portion 69b of the arm member 69 via a spring member 89, and the spring member 89 is connected to the other end portion 69b.
It is urged by and abuts on the outer surface of the arm member 69. When the base plate portion 79 is in contact with the outer surface of the arm member 69, the two support portions 75, 77 have their tip portions 75a, 77.
The a is in a state of being urged to the protruding position where it protrudes toward the corrugated tube T side from the tip 35a of the cutting blade 29 (shown by the solid line in FIG. 5). When a force against the biasing force acts on the support portions 75 and 77 at the projecting position, the support portion 75 moves along the through hole 85, and the substrate portion 79 causes the arm member 69.
The support portions 75 and 77 protruding from the inner surface of the arm member 69 move to the retracted position on the side opposite to the corrugated tube, and the blade portion 35 of the cutting blade 29 is exposed (shown by the broken line in FIG. 5).

Next, the operation will be described.

The corrugated tube T is cut by placing the corrugated tube T in the supporting recess 73 of one arm member 67, aligning the tips 75a and 77a of both supporting portions 75 and 77 with the groove Q of the corrugated tube T, and Both arm members 6
Gently clamp one end 67a, 69a of 7,69. As a result, the tip portions 7 of the support portions 75 and 77 at the protruding position are
5a and 77a engage with the groove portion Q of the corrugated tube T, and the corrugated tube T is supported.

Next, one end 6 of both arm members 67 and 69
Firmly grip 7a and 69a. As a result, both support parts 7
5 and 77 move from the protruding position to the retracted position,
The tip portion 35a of the cutting blade 29 which is pushed down and exposed is pierced in the mountain portion P between the groove portions Q engaged with the support portions 75 and 77, a cutting start hole is formed, and the cutting blade 29 is pushed down by further tightening. Thus, the corrugated tube T is cut by cutting both sides in the circumferential direction of the mountain portion P from the cutting start hole by the blade portion 35, and the cutting blade 29 is inserted through the slit 73a.

Therefore, as in the first embodiment, the corrugated tube T is surely cut at the ridges P and the cut surface is less likely to have an edge, so that a uniform cut surface shape can be obtained. At the same time, the inserted wire harness is not damaged at the cut surface, and the support portions 75 and 77 engage with the groove portions Q on both sides adjacent to the one mountain portion P.
The corrugated tube T can be more reliably cut at the mountain portion P.

During the cutting of the corrugated tube T, the supporting portions 75 and 77 are provided with the tip portion 35a of the cutting blade 29.
Also, since the vicinity of the blade portion 35 is always supported, the corrugated tube T is less likely to be displaced during cutting, and a more uniform cut surface shape can be obtained.

Since the cutting device 65 is a hand tool, the cutting device 65 can be easily moved to the place where the corrugated tube T is provided and used, and the cutting operation can be easily performed.

Next, a third embodiment will be described with reference to FIGS. 6 and 7.

FIG. 6 is a perspective view showing a corrugated tube cutting device according to a third embodiment, and FIG. 7 is a cross-sectional view of the main part of FIG. The same components as those in the first and second embodiments are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIGS. 6 and 7, the cutting device 91 of the third embodiment is a modification of the second embodiment, and is supported by the support recess 73 of the second embodiment. Support projections 93 and 95 as support portions that are engaged with the groove portions Q of the corrugated tube T are provided so as to face the tip portions 75a and 77a of the portions 75 and 77.

As described above, the support projections 9 are formed in the support recesses 73.
By providing 3, 95, the corrugated tube T is less likely to be displaced during cutting, and a more uniform cut surface shape can be obtained.

[0043]

As described above, according to the invention described in claim 1, the piercing cutting start hole is formed in the mountain portion between the groove portions where the tip end portion of the cutting blade engages with the support portion, and the blade is formed. Both sides in the circumferential direction of the mountain portion are cut open from the cutting start hole by the portion, the corrugated tube is surely cut at the mountain portion, and an edge is unlikely to occur on the cut surface, so that a uniform cut surface shape can be obtained, The inserted wire harness is not damaged at the cut surface.

According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, in addition to the effect of the invention described in claim 1, in the course of cutting, the support portion has the tip of the cutting blade. Since the vicinity of the blade and the blade is always supported, the corrugated tube is less likely to be displaced during cutting and a more uniform cut surface shape can be obtained.

According to the invention of claim 3, in addition to the effect of the invention of claim 1 or claim 2, since the supporting portion engages with the groove portions on both sides adjacent to one mountain portion, the corrugated gate is formed. The tube can be cut more reliably at the mountain portion.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a corrugated tube cutting device according to a first embodiment.

2 is a perspective view of the cutting blade of FIG. 1. FIG.

FIG. 3 is a sectional view of a main part of FIG.

FIG. 4 is a perspective view showing a corrugated tube cutting device according to a second embodiment.

FIG. 5 is a sectional view of a main part of FIG.

FIG. 6 is a perspective view showing a corrugated tube cutting device according to a third embodiment.

FIG. 7 is a sectional view of a main part of FIG. 6;

FIG. 8 is a perspective view showing a conventional example.

FIG. 9 is a side view showing a conventional problem.

FIG. 10 is a side view showing a conventional problem.

[Explanation of symbols]

 21 cutting device 29 cutting blade 35a tip part 35 blade part 47 support part 49 support part 65 cutting device 75 support part 77 support part 91 cutting device 93 support projection (support part) 95 support projection (support part) T corrugated tube P mountain part Q groove

Claims (3)

[Claims] 1. A support portion that engages with and supports a groove portion of the corrugated tube at two locations separated from each other in the longitudinal direction of the corrugated tube, and a ridged portion between the groove portions of the corrugated tube supported by the support portion. A tip portion forming a cutting start hole in the mountain portion,
A corrugated tube cutting device, comprising: a cutting blade that is formed on both sides of the tip portion and has cutting blades that open both sides in the circumferential direction of the mountain portion from the cutting start hole. 2. The corrugated tube cutting device according to claim 1, wherein the support portions are provided on both sides of the cutting blade, and the cutting is performed from a projecting position projecting toward the corrugated tube side with respect to the cutting blade. A corrugated tube cutting device, wherein the blade is movable to a retracted position on the side opposite to the corrugated tube where the blade is exposed, and is biased to the protruding position. 3. The corrugated tube cutting device according to claim 1, wherein the support portion engages with groove portions on both sides adjacent to one mountain portion of the corrugated tube. Corrugated tube cutting device.