JP2000071102A - Chamfering apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and accurately chamfer the outer peripheral edges of the ends of a plurality of pipes and bars with different diameters by providing a plurality of guide cylinder portions with different diameters into which a pipe or a bar to be chamfered is guided, by providing walls which receive the tip of the pipe or the bar at the depth of each guide cylinder portion, and providing a cutting blade at a corner portion of each wall. SOLUTION: When a synthetic resin made pipe 3 with an outer diameter substantially equal to the inner diameter of a second guide cylinder portion 13 for large diameter is chamfered, the pipe 3 is inserted into the second guide cylinder portion 13, and is pressed to a position where the outer peripheral edge of the pipe 3 touches a knife- edge of a cutting blade 2b. The outer peripheral edge of the pipe 3 is chamfered by rotating the pipe 3 over one cycle while pressing the tip surface of the pipe to the knife-edge until the tip surface of the pipe touches a wall 17. Then, while a tip portion of a reference line marking too such as a magic marker is parallel with the edge of an opening of the second guide cylinder portion 13, the tip of the standard line marking tool is pressed on the surface of the pipe 3, and the pipe 3 is rotated one or more cycles to write a standard line on the outer peripheral surface of the pipe 3. For chamfering a small-diameter pipe, the pipe is inserted into a first guide cylinder portion 12, and the similar work is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chamfering device for chamfering the outer peripheral edge of a pipe or rod connected to a joint.

[0002]

2. Description of the Related Art When a pipe made of vinyl chloride resin or the like is connected via a pipe joint, in order to make it easier to insert the pipe end into the pipe joint, a pipe end on the side to be connected is usually used at a construction site. The outer edge is chamfered. By the way, conventionally, in order to chamfer the inner edge of the pipe end, a reamer 100 having a conical blade 101 on the inside as shown in FIG. Chamfers such as scrapers 200 with possible blades 201 are on the market,
As described above, there is no chamfering device capable of easily chamfering the outer peripheral surface of the tip of a pipe or rod on site.

[0003] Therefore, conventionally, an operator has been chamfering on site by holding a cutting tool such as a cutter, a file or a grinder by hand. However, in the work of chamfering by holding the cutting tool by hand as described above, the workability is poor, it takes time, and it requires skill to chamfer so as to have a uniform taper in the circumferential direction. There is.

[0004]

SUMMARY OF THE INVENTION In view of such circumstances, the present invention can easily and easily prepare a plurality of pipes and rods having different diameters by simply preparing one chamfer. It is an object of the present invention to provide a chamfer that can be accurately chamfered.

[0005]

In order to achieve the above object, a chamfering device according to the present invention comprises a plurality of guide cylinders having different diameters for guiding a pipe to be chamfered, and the guide cylinder. A chamfer body having a wall at the back of the guide tube for receiving the tip end surface of a pipe or rod, and a cutting fixed to the chamfer body such that a cutting edge crosses a part of a corner of each wall. And a blade.

Further, in the chamfer of the present invention, claim 2 is provided.
The guide cylinder part has a plurality of guide parts having different diameters, and the cutting edge crosses a part of a corner of each guide part in a stepwise manner from the wall toward the entrance side. The length from the wall to the opening end of the guide tube portion is from the chamfered end of the pipe or rod to be chamfered, and the joint of the pipe or rod is fixed to the chamfer body as in claim 3. It is preferable to adopt a configuration in which the length is up to the marked line of the insertion length.

In the present invention, the material of the chamfer body may be a metal material such as brass or bronze, or a synthetic resin such as polyvinyl chloride or polyethylene. The cutting blade is
It is not particularly limited as long as it is a harder material than the pipe or rod to be chamfered.
It is desirable to have excellent corrosion resistance, for example, stainless steel or a chromium-plated metal material is preferable.

The shape of the cutting blade depends on the type (diameter and material, etc.) of the pipe or rod to be chamfered, and is not particularly limited. For example, a thin plate having a thickness of about 0.1 to 5.0 mm is preferable. Further, the tip of the portion in contact with the pipe or rod to be chamfered, that is, R of the cutting edge portion is preferably 0.5 mm or less. As a method of fixing the cutting blade to the chamfer body, a method using screws or bolts is generally used, but a method of bonding or welding may be used.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.
This will be described in detail with reference to the drawings. FIG. 1 shows a first embodiment of a chamfer according to the present invention.

As shown in FIG. 1, the chamfer A is provided with a chamfer main body 1 and cutting blades 2a and 2b. The chamfer main body 1 is formed of brass, and has a first guide tube portion 12 provided on one side and a second guide tube portion 13 provided on the other side with the chamfer portion 11 interposed therebetween. The first guide cylinder 12 and the second guide cylinder 13 have the same center axis, and the inner diameter of the first guide cylinder 12 is smaller than the inner diameter of the second guide cylinder 13.

The chamfer 11 includes a wall 17, a first guide groove 15, a second guide groove 16, and cutting blade fixing parts 18,1.
9 is provided. The first guide groove 15 has the same center axis as the first guide cylinder 12 and has a semicircular cross section of the same diameter.

The second guide groove 16 is provided in the second guide cylinder 1.
3 has the same central axis and a semicircular cross section of the same diameter. The wall 17 includes the first guide groove 15 and the second guide groove 1.
6 are provided.

The cutting blade fixing portions 18 and 19 are provided so as to project on both sides of the wall 17. One cutting blade 2a
Is fixed to the cutting blade fixing portion 18 via the fixing screw 21 so that the cutting edge crosses the first guide groove portion 15 and the corner portion 17a of the wall 17.

The other cutting blade 2b has a second guide groove 16
Is fixed to the cutting blade fixing portion 19 via fixing screws 21 so that the cutting edge crosses the corner portion 17 b of the wall 17.
Further, the chamfering device A is configured such that the first guide cylindrical portion 12 is
Of the pipe 3 chamfered on the first guide cylinder portion 12 side to the length from the pipe end to the marked line,
From the pipe end of the pipe chamfered on the side of the second guide cylinder section 13 to the marked line.

Next, a method of using the chamfer A will be described.

First, as shown in FIG. 1, a synthetic resin tube (hereinafter referred to as a “tube”) having an outer diameter substantially the same as the inner diameter of the first guide tube portion 12 is used.
In the case of chamfering 3), the pipe 3 is inserted from the first guide cylinder 12 into the first guide groove 13, and is pushed until the outer peripheral edge of the pipe 3 hits the cutting edge of the cutting blade 2a. Then, while pressing the pipe end face against the blade edge, the pipe end face is
The pipe 3 is rotated one or more rounds until the outer circumference of the pipe 7 is chamfered.

Thereafter, the tip of the mark-marking tool is pressed against the surface of the pipe 3 while the tip of the mark-marking tool such as magic is along the opening edge of the first guide tube portion 12, and the pipe 3 is turned around. With the above rotation, the marking line is drawn on the tube 3.

On the other hand, when chamfering a pipe having an outer diameter substantially the same as the inner diameter of the second guide cylinder 13, the second guide cylinder 13 is chamfered.
Insert the tube into the second guide groove 15 from
The outer peripheral edge of the pipe is chamfered.

After that, the tip of the marking tool is pressed against the surface of the pipe while the tip of the marking tool such as magic is along the opening edge of the second guide cylinder 13, and the pipe is rotated one or more rounds. Then, a mark is drawn on the pipe chamfered on the side of the second guide cylinder 13.

As described above, the chamfer A can accurately and easily chamfer the outer peripheral edges of the pipe ends of two kinds of pipes having different diameters.

In addition, in the insertion type joint, a mark line is provided in advance at the insertion position of a pipe connected to the joint in order to judge the quality of the joint connection portion during or after construction. However, as in the past, a method of measuring a predetermined length from the pipe end with a measure or ruler and writing with a marker marking tool such as magic, in order to write the marking line on the surface only with human hands, An inexperienced worker may say that the marking line is shifted. However, in the case of this chamfer A,
The length from the wall 17 to the opening end of the first guide cylinder portion 12 and the length from the wall 17 to the opening end of the second guide cylinder portion 13 are the lengths from the pipe end of the pipe to be chamfered to the marked line in advance. , So that the tip of the marker or the like is drawn along the opening edge of the first guide cylinder 12 or the second guide cylinder 13 while the tip of the marker or the like is drawn. Is pressed against the surface of the pipe, and the pipe can be marked accurately and easily by simply rotating the pipe one or more times.

FIG. 2 shows a second embodiment of the chamfer according to the present invention. As shown in FIG. 2, in the chamfer B, the first guide groove 15 'and the second guide groove 16' of the chamfer main body 1 'are formed in an arc-shaped cross-sectional shape having an arc angle larger than 180 °. Except that the chamfer A
Is similar to

That is, according to the chamfering device B, the angle at which the pipe end of the pipe to be chamfered comes into contact with the cutting edge of the cutting blade 2a (2b) becomes acute, so that the chamfering becomes easier.

FIG. 3 shows a third embodiment of the chamfer according to the present invention. As shown in FIG. 3, in the chamfering device C, the chamfering device main body 4 is configured such that the first guide cylinder 41 and the first guide groove 42 are parallel to the second guide cylinder 43 and the second guide groove 44. In preparation for both the guide cylinders 41, 43
The cutting blade 5 is inserted into the first guide groove 42 and the second guide groove 44 in the same direction.
It is the same as the above-mentioned chamfering device A except that it is fixed to the cutting blade fixing portion 46 provided therebetween and is chamfered by one cutting blade 5.

In FIG. 3, reference numeral 45 denotes a wall, and 51 denotes a cutting blade 5.
Fixing screw.

FIGS. 4 to 6 show a fourth embodiment of the chamfer according to the present invention. As shown in FIGS. 4 to 6, the chamfering device D includes a chamfering device main body 6 and two cutting blades 7a and 7b.

The main body 6 of the chamfering device is arranged such that the first guide tube portion 8a is opposed to the wall 61 provided with a hole 61a in the center.
And a second guide cylinder 8b. The first guide tube portion 8a includes two guide portions having different diameters, the diameter of which increases in the order of the first guide portion 81 and the second guide portion 82 from the wall 61 side toward the entrance side.

The diameter of the first guide portion 81 is larger than that of the hole 61a, and the second guide portion 82 is provided so as to expand in a stepwise manner from the first guide portion 81. The first guide tube portion 8a is partially cut out, and the notch portion 8a is formed.
3, a cutting blade 7a is attached to the cutting blade 7 as described later.

The second guide cylindrical portion 8b includes a third guide portion 83, a fourth guide portion 84 from the wall 61 side toward the entrance side.
The fifth guide portion 85 is provided with three guide portions having different diameters, the diameters of which increase in order. The third guide portion 83 has a hole 6
1a and smaller than the first guide portion 81.

The diameter of the fourth guide portion 84 is larger than that of the third guide portion 83 and smaller than that of the second guide portion 82. The diameter of the fifth guide portion 85 is the second guide portion 82.
It is getting bigger.

As shown in FIG. 6, the second guide cylinder 8b has a notch 87 at a diagonal position of the notch 83, and the cutting blade 7b is attached to the notch 87 as described later. It has become. Each of the cutting blades 7a and 7b includes a base 71 and a blade main body 72.

As shown in FIG. 6, the base 71 is fitted into the notch 83, and the tip of a fixing screw 65 screwed through the chamfer body 6 from the outer wall side of the chamfer body 6. Are screwed together and fixed to the chamfer main body 6. Blade body 7
2 is inserted into the notch 87, and the base 7
The distal ends of the adjusting screws 78 screwed through the screw 2 are screwed together and fixed to the base 71.

The blade body 72 on the first guide cylinder 8a side
As shown in FIG. 6, the adjusting screw 7 is fitted into the notch 83, and is screwed through the base 71 from the base 71 side.
8 are fixed so as to be screwed together and cross the corners of the first guide portion 81 and the second guide portion 82, respectively. On the other hand, as shown in FIG. 6, the blade main body 72 on the second guide cylinder 8b side is fitted into the notch 87, and the tip of the adjusting screw 78 screwed through the base 71 from the base 71 is inserted. The third guide portion 83, the fourth guide portion 84, and the fifth guide portion 85 are screwed together and fixed so as to cross the respective corner portions.

The two-blade main body 72 adjusts the tightening ratio of the adjusting screw 78 so that the first guide cylindrical portion 8 is formed.
a or the inside of the second guide tube portion 8b. In FIG. 6, reference numeral 79 denotes a positioning pin.

As described above, since the chamfer D is provided with the five guide portions 81 to 85 having different diameters, five kinds of pipes having substantially the same outer diameter as the inner diameter of each guide portion 81 to 85 are provided. Can be chamfered. In addition, the double blade body 72
By adjusting the tightening ratio of the adjusting screw 78,
Since it can be advanced and retracted in the inner direction of the first guide cylinder 8a or the second guide cylinder 8b,
The protrusion width of the blade main body 72 to the corner portion can be adjusted. Therefore, the thickness of the chamfer can be adjusted.

The chamfer according to the present invention is not limited to the above embodiment. For example, in the above embodiment,
Although the number of the guide cylinders is two, three or more guide cylinders may be used.

[0037]

Since the chamfer according to the present invention is configured as described above, only one chamfer is prepared.
In addition to being able to handle a plurality of pipes and rods having different diameters, chamfering can be performed easily and accurately. Claim 2
Thus, even a small chamfer can be used for chamfering a larger number of tubes and rods having different diameters.

Further, according to the third aspect, it is possible to accurately and easily draw a mark on the surface of the pipe as a measure of the degree of insertion into the joint.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of a chamfer according to the present invention, wherein FIG. 1 (a) is a plan view, FIG. 1 (b) is a front view, and FIG. 1 (c) is a side view.

FIG. 2 shows a second embodiment of the chamfer according to the present invention, wherein FIG. 2 (a) is a plan view, FIG. 2 (b) is a front view, and FIG. 2 (c) is a side view.

FIG. 3 shows a third embodiment of the chamfer according to the present invention, wherein FIG. 3 (a) is a plan view and FIG. 3 (b) is a side view.

FIG. 4 is an exploded perspective view illustrating a chamfering device according to a fourth embodiment of the present invention.

FIG. 5 is a front view of the chamfer of FIG. 4;

FIG. 6 is a sectional view of the chamfer of FIG. 4;

FIG. 7 is a sectional view of a conventional reamer.

FIG. 8 is a perspective view of a conventional scraper.

[Explanation of symbols]

 A, B, C, D Chamferer 1, 1 ', 4, 6 Chamferer body 2a, 2b, 5, 7a, 7b Cutting blade 8a First guide cylinder 8b Second guide cylinder 12 First guide cylinder Part 13 Second guide cylinder part 17, 61 Wall 41 First guide cylinder part 43 Second guide cylinder part 81 First guide part 82 Second guide part 83 Third guide part 84 Fourth guide part 85 Fifth guide part

Continuation of the front page (72) Inventor Yoshitaka Miyoshi 75 Nojiri, Ritto-cho, Kurita-gun, Shiga Prefecture Sekisui Chemical Co., Ltd. F term (reference) 3C045 AA10 BA40 CA07 DA04 FE18 HA07

Claims (3)

[Claims] 1. A chamfering device having a plurality of guide cylinders, each of which guides a pipe having a different diameter, and a wall behind the guide cylinder for receiving a distal end surface of a pipe or rod inserted into the guide cylinder. A chamfering machine comprising: a main body; and a cutting blade fixed to the chamfering body such that a cutting edge crosses a part of a corner of each wall. 2. A guide cylinder portion has a plurality of guide portions having different diameters, the diameter of which increases stepwise from a wall toward an entrance side, and a cutting blade forms a part of a corner of each guide portion with a cutting edge. 2. The chamfer according to claim 1, wherein the chamfer is fixed to the chamfer body so as to cross the chamfer. 3. The length from the wall to the opening end of the guide cylinder is:
The chamfer according to claim 1 or 2, wherein the length of the chamfer is from the chamfered end of the pipe or rod to be chamfered to a marked line of the length of insertion of the pipe or rod into the joint.