JP2603791Y2 - Piercing tool - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a resin-made branch joint for fusing to a resin pipe to form a branch pipe. The present invention relates to a piercing tool provided with a male screw portion and a cutting edge portion which bites into the resin tube by screwing of the male screw portion with respect to the female screw portion.

[0002]

2. Description of the Related Art Conventionally, in the above-mentioned drilling tool, the male screw portion and the cutting edge portion are integrally provided.
The blade tip portion was configured to rotate integrally with the male screw portion and cut into the resin tube.

[0003]

However, according to the above configuration, the blade tip is configured to rotate integrally with the male screw portion and bite into the resin tube. As the resin pipe and the resin pipe are pinched, the frictional force between the resin pipe and the cutting edge that resists the pushing of the cutting edge, in addition to the frictional force against the rotation of the cutting edge, generates a very large drilling load. In addition to taking time and effort in the rotation operation, the branch joint is designed to withstand the aforementioned piercing load,
There was a disadvantage that it had to be thick. In order to solve this drawback, a piercing tool is provided in which a screw member forming the male screw portion and a blade body forming the cutting edge portion are provided separately, and are relatively rotatably connected around their axes. Has been proposed. According to this piercing tool, since no frictional force against the rotation of the cutting edge portion is generated, the piercing load can be reduced, but the screw member and the blade body are configured to be relatively rotatable as described above. In such a case, a gap is generally formed between the two so that rotation can be smoothly performed. Therefore, in the above configuration, the posture of the blade body with respect to the screw member at the time of drilling is improper due to the gap. In some cases, it becomes stable and it is difficult to perform perforation smoothly. The present invention
In view of the above, it is an object of the present invention to provide a piercing tool that can reduce a piercing load and that can pierce the blade in a state in which the posture of a blade body with respect to a screw member is stabilized.

[0004]

In order to achieve the above object, a piercing device according to the present invention is provided with a screw member forming an external thread portion and a blade body forming a cutting edge portion separately. A first end face located on the blade body side of the end faces in the axial direction of the screw member, the first end face facing the first end face in the axial direction; An elastic member provided with third and fourth end faces that are separately and elastically in contact with the first and second end faces when the blade body is pushed into the resin pipe between the second end face of the body and the second end face of the body. The frictional resistance of the third and fourth end faces with respect to the first and second end faces is set to be small, and the operation and effect are as follows.

[0005]

In other words, the screw member forming the male screw portion and the blade body forming the cutting edge are provided separately, and these
State between the blade and the blade via an elastic material with low frictional resistance
In because are connected relatively rotatably to their axis around by rotating the screw member relative to the female screw portion of the branch connection
When it is screwed the threaded member to the resin pipe side Te, the cutting edge portion, the screw
Without being rotated integrally with the member, it is pushed in the axial direction as it is, and it is cut into the resin tube by the pressing force to pierce the resin tube. As a result, at the time of drilling, a frictional force against the rotation of the cutting edge is not generated between the cutting edge and the resin pipe,
The frictional force between them can be suppressed only to the frictional force that resists the pushing of the cutting edge, and the drilling load can be reduced. Moreover, when pushing the blade into the resin tube
A first end surface of the screw member and a third end surface of the elastic member.
And a second end face of the blade body and a fourth end face of the elastic material.
Because the end face is in close contact, for example, with the axis of the screw member
Inconveniences such as displacement of the axis of the blade body and the like do not occur,
The positional relationship between the screw member and the blade is extremely stable.
Will be maintained. As a result, the blade body is
When punching by pressing
The peripheral surface has a cylindrical shape, and of the blade body of the blade tip portion of the blade body.
The blade body and the resin tube abut at a position deviated from the axis.
Even if it does, the blade body will tilt with respect to the screw member.
Such inconvenience does not occur. Therefore, added to the screw member
The pushing force is reliably transmitted to the blade body and is suitable for the resin pipe.
A hole having an irregular shape is formed. Thus, the drill of the present invention
According to this, it is possible to prevent rattling of the blade body at the time of drilling, and when the operator directly operates the screw member, it is possible to operate without discomfort, and further, after drilling, the resin pipe is inserted into the blade body. After pulling out the blade body from the resin tube while holding the cut piece of, for example, when plugging the cut piece together with the cut piece in the hole of the resin pipe, the perforator, etc. It can be accurately inserted without displacement.

[0006]

[Effects of the Invention] As described above, according to the punch of the present invention.
For example, it is easy to rotate the screw member.
In addition to the reduced drilling load.
The structure of the branch joint is simplified because the thickness of the branch joint can be reduced.
In addition, when the holes drilled in the resin pipe are re-plugged with a pier, etc., the piers can be accurately inserted without displacement, so that the resin pipe is plugged with the pier at the time of re-plugging. It is possible to provide a piercing tool which can prevent the fluid from leaking from the resin pipe without cutting.

[0007]

Next, an embodiment of the present invention will be described with reference to the drawings. 2 and 3, a resin service tube 3 having a drilling tool 2 therein and having a drilling jig 10 attached thereto is mounted on a resin gas pipe 1 (an example of a resin tube). The state where the branch pipe is formed by fusing to the pipe 1 is shown.

The service tee 3 has a saddle-shaped saddle portion 4.
And a tubular T-shaped joint main body 5 connected to the saddle portion 4. The T-shaped joint body 5 includes a saddle 4
A first tubular portion 8 that is directly connected to the first tubular portion, and a second tubular portion 21 that is connected to and connected to a longitudinally intermediate portion of the first tubular portion 8.
The first cylindrical portion 8 has a female screw portion 7 for the drilling tool 2 formed entirely on the inner peripheral portion thereof, and an upper end male screw portion 6 which can be screwed to a drilling jig 10 at its free end. Is formed.

The drilling jig 10 is a cylindrical cap 12 having a female thread 11 to be screwed into the upper male thread 6.
And a rod-shaped turning operation member 13 that turns the perforator 2 while being inserted through the cap 12.
The turning operation member 13 is formed in a hexagonal column shape at both ends for turning operation. A stopper ring 14 is provided between the upper end of the cap 12 and the hexagonal column at the upper end of the turning operation member 13, and the inner peripheral portion of the cap 12 and the turning operation member 13 are provided.
An O-ring 40 is interposed between the intermediate portion and the outer peripheral portion. Note that the bottom of the concave portion of the cap 12 and the service tee 3
An O-ring 40 is also interposed between the first cylindrical portion 8 and the upper end surface.

As shown in FIG. 1, the piercing tool 2 is provided with a female screw portion 7 formed on the inner surface of the first cylindrical portion 8 of the service tee 3.
A screw member 18 that forms the screw member 15 and a blade body 23 that forms the blade edge portion 16 are provided separately from each other. It is connected to the core so as to be relatively rotatable, and is configured to move toward the gas pipe 1 by the screwing of the male screw part 15 with respect to the female screw part 7 so as to bite into the gas pipe 1 to make a hole. The connecting portion 17 between the screw member 18 and the blade body 23 will be described. A support shaft 24 for supporting the blade body 23 is provided at one end of the screw member 18 in the axial direction so as to protrude in the axial direction. As shown in FIG. 2, the support shaft 24 is inserted into a hollow portion of the head of the blade body 23, and a blade body retaining ring 26 is screwed to a protruding end of the support shaft 24. A ring-shaped elastic member 27 made of polyacetal is interposed between the screw member 18 and the blade body 23 in a state of being fitted around the support shaft 24. The elastic member 27 is a screw member 1
The elastic member 27 is housed in first and second annular concave portions 28 and 29 respectively formed at opposing ends of the blade 8 and the blade body 23. The third and fourth end faces 30, 31 which are both end faces in the direction are the first bottom face 32 (an example of a first end face) of the first annular recess 28 and the second bottom face 33 (the second end face of the second annular recess 29). Example)
The thickness is set individually and so as to elastically adhere to each other. Further, the frictional resistance of the third and fourth end faces 30, 31 with respect to the first and second bottom faces 32, 33 is set to be small so that the screw member 18 and the blade body 23 can rotate relatively smoothly. is there. The screw member 18 has a through hole 19 formed along the axis, and a hexagonal hole 20 for turning operation is formed in the head. The state of the front gas pipe 1 can be observed.

Next, a description will be given of a procedure for piercing the gas pipe 1 with the piercing tool 2 having the above-described configuration installed in the service tee 3 and the movement of each member.

First, the service tee 3 fused to the gas pipe 1
The cap 12 is screwed and attached. At this time, the hexagonal column at the lower end of the rotating operation member 13 is fitted into the hexagonal hole 20 of the drill 2 in the service tee 3. Then, the hexagonal column portion at the upper end of the rotating operation member 13 is rotated with a spanner to screw the male screw portion 15 of the piercing tool 2. By this screwing, the blade tip 16 is pushed toward the gas pipe 1 without rotating, and cuts into the gas pipe 1 to pierce it. Gas pipe 1
The cut piece enters the hollow portion of the blade edge portion 16 in a circular shape and is held there. After piercing is completed, the piercing tool 2 is pulled up by rotating the wrench in the opposite direction. FIG.
As shown in FIG. 5, when the joint body 5 is pulled up above the joint with the second tubular portion 21, the entire jig 10 is removed from the service tee 3, and the first jig 10 having the O-ring 40 is provided.
The cap 22 for closing the cylindrical portion is externally screwed to the first cylindrical portion 8.

[Another Embodiment] As the elastic member 27, a disc spring may be coated with a synthetic resin such as ethylene tetrafluoride (Teflon) and the coefficient of friction of the surface may be set small.

The present invention is applicable to the second cylinder 2
The present invention may be applied to a branch joint such as a saddle joint without one.

In the claims of the utility model registration, reference numerals are written for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a punch.

FIG. 2 is a longitudinal sectional view showing a state of piercing by a piercing device.

FIG. 3 is a longitudinal sectional view showing a state of piercing by a piercing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Resin pipe 3 Service tee 7 Female thread part 15 Male thread part 16 Cutting edge part 18 Screw member 23 Blade body 30 Third end face 32 Fourth end face 32 First end face 33 Second end face

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-177597 (JP, A) Japanese Utility Model Application 52-6887 (JP, U) Japanese Utility Model Application 5-63715 (JP, U) Japanese Utility Model Application Hei 5- 24895 (JP, U) J. 52-55179 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) B26F 1/16 B23B 41/08 F16L 41/04

Claims (1)

(57) [Scope of request for utility model registration] An internal thread (7) provided on the inner peripheral surface of a branch pipe of a resin-made branch joint (3) for forming a branch pipe by fusing to a resin pipe (1). A piercing tool provided with a free male screw portion (15), and a cutting edge portion (16) that bites into the resin pipe (1) by screwing of the male screw portion (15) with respect to the female screw portion (7). A screw member (18) forming the male screw portion (15) and a blade body (23) forming the cutting edge portion (16) are provided separately and connected to each other so as to be relatively rotatable around their axis. A first end surface (32) of the end surface of the screw member (18) in the axial direction, which is located on the blade body (23) side, faces the first end surface (32) in the axial direction. The blade body (2
3) between the first and second end faces (32) and (33) when the blade body (23) is pushed into the resin pipe (1) between the second end face (33) and the second end face (33). An elastic member (27) having third and fourth end surfaces (30) and (31) that are elastically in contact with each other is provided, and the third and fourth members are provided on the first and second end surfaces (32) and (33). A piercing tool in which the frictional resistance of the end faces (30) and (31) is set to be small.