JP2598493Y2 - Pipe drilling device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe piercing device, and more particularly , to a saddle-shaped portion attached to an outer peripheral surface of a pipe , and one end of an opening provided in a part of the saddle-shaped portion. A side joint, and a branch joint integrally provided with a pipe portion forming a branch passage along the radial direction of the pipe, the opening of the saddle-shaped portion in the pipe in a state where the branch joint is attached to the pipe. The present invention relates to a pipe drilling device that drills a through-hole that becomes a part of a branch path in a portion corresponding to a hole.

[0002]

2. Description of the Related Art After attaching a branch joint formed by integrally providing the saddle-shaped portion and the pipe portion to a pipe such as a gas pipe or a water pipe, an opening hole of the saddle-shaped portion in the pipe is formed. When drilling the through hole in the corresponding part of
Conventionally, a piercing tool such as a hole saw is provided at the tip of a rotating body which is rotated by a rotating operation means such as a manual handle and is inserted into the pipe portion without being engaged with the pipe portion. Was used. And pressing the rotating body in a direction along the branch while holding the pipe drilling device by hand,
In addition, the rotator is rotated by using the rotation operation means to rotate the piercing tool, and the through-hole is formed based on a piercing action by the rotation.

[0003]

In the case of drilling the through-hole using such a conventional pipe drilling apparatus, holding the pipe drilling apparatus and pressing the rotating body in a direction along the branch path. In addition, it is necessary to rotate the rotating body, and it is necessary to perform operations to achieve a plurality of objects at the same time, and further, a large pressing force is required, so that the workability is poor. In particular, when the branch joint is attached to the side of the pipe, there is a problem that the pressing direction is lateral and the workability is significantly deteriorated. The present invention has been made in view of such a situation, and has as its object to provide means capable of solving the above-described workability problem.

[0004]

According to the present invention, there is provided a tube drilling apparatus comprising a main body having a female screw portion formed on an inner peripheral surface, and a male screw portion screwable with the female screw portion formed on an outer peripheral surface. A rotating body configured to advance and retreat along the branch path by being rotated in a state where the male and female screw portions are screwed together, and rotatably linked to the rotating body. And a punching tool.

[0005]

According to the characteristic structure of the present invention, since the main body and the rotating body are separately formed, the through-hole is formed by simply rotating the rotating body by fixing the main body by some means. Can be drilled. Moreover, the piercer is because it is relatively rotatably linked to the rotating body, with a rotating body to rotary operation, piercer has not be rotated by the rotation of the rotating body, As a result, the piercing tool advances so as to push off the pipe to pierce the through hole .
Therefore, no chips are generated.

[0006]

According to the characteristic structure of the present invention, it is possible to concentrate on the operation of rotating the rotating body at the time of drilling the through-hole, and the chips generated by the conventional pipe drilling device are reduced.
When it enters the pipe, the chips are
Since it is easy to move in the tube, it is extremely difficult to collect
Debris does not flow into the valve and interfere with the flow of fluid.
In contrast to which troubles may occur,
The proposed pipe drilling device does not generate chips, so
There is no such fear, and the workability is greatly improved. In addition, according to the characteristic configuration of the present invention, a steel pipe or cast iron
If it is a tube other than a tube, not only a resin tube but also, for example,
Made of soft metal made of non-ferrous metals such as aluminum pipes and copper pipes
Similar effects can be obtained when connecting a branch joint to the branch of a pipe.
Play.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows that a thermoplastic resin branch joint 2 is attached to a thermoplastic resin gas pipe 1 (an example of the pipe), and the gas pipe 1 is penetrated using the pipe drilling device of the present invention. The state where the hole 1a is formed is shown.

The branch joint 2 has a saddle-shaped portion 2a attached to the outer peripheral surface of the gas pipe 1 from the side.
And a pipe portion 2b that communicates one end with an opening hole provided in a part of the saddle-shaped portion 2a and that forms a branch along the radial direction of the gas pipe 1. It becomes. An electric heating element (not shown) that generates Joule heat for fusing itself and the connected portion of the gas pipe 1 is embedded in the inner surface side of the saddle-shaped portion 2a, and the saddle-shaped portion 2a is formed of the gas. The branch joint 2 is attached to the gas pipe 1 in a sealed state by energizing the electric heating element while holding the branch joint 2 in contact with the outer peripheral surface of the pipe 1. In the following description, the saddle-shaped portion 2a is referred to as a distal end (a distal end when viewed from outside the tube).
The side of the pipe portion 2b is a base end side.

When the branch joint 2 is attached to the gas pipe 1, a through-hole 1a which is a part of a branch path is formed in a portion of the gas pipe 1 corresponding to the opening of the saddle-shaped portion 2a. For this purpose, the pipe drilling device of the present invention is used.

[0010] The pipe drilling device is provided with radially divided outer holding members 3 and 4 capable of holding the pipe portion 2b. Further, a cylindrical main body 5 is provided which is locked inside the outer holding members 3 and 4 and has a female screw portion 52a formed on the inner peripheral surface. Further, a male screw portion 6a which can be screwed with the female screw portion 52a of the cylindrical main body 5 is formed on the outer peripheral surface, and the female screw portion 52a, 6a is rotated in a screwed state so as to be rotated. A rotating body 6 is provided that is configured to advance and retreat along a branch path, and that is provided at the tip with a piercing tool 7 for piercing the gas tube 1 with the through hole 1a.

The outer holding members 3 and 4 each have a shape obtained by dividing a short, substantially cylindrical body which can be externally fitted into the pipe portion 2b into two parts in the radial direction. One of the two opposing portions generated by the arrangement is pivotally connected by a pivot member 8, and the other is releasably fastened by a fastener 9. Then, the fastening by the fastener 9 is released to release the outer holding members 3 and 4.
Is opened, the outer holding members 3 and 4 are closed so as to be fitted to the pipe portion 2b, and then the outer holding members 3 and 4 are fastened by the fastener 9, so that the outer holding members 3 and 4
The pipe portion 2b can be held and held.

The tubular main body 5 is internally fitted to a locking portion 51a which is locked at the base end of the pipe portion 2b inside the outer holding members 3 and 4 and an inner peripheral surface of the pipe portion 2b. The first cylindrical member 51 includes a combination of a first cylindrical member 51 having a fitting portion 51b and a second cylindrical member 52 having a female screw portion 52a that can be screwed to the male screw portion 6a of the rotating body 6. The second tubular body 52 is internally fitted to and integrated with a base end portion of the tubular body 51. The fitting portion 51b of the first tubular body 51 has a two-stage structure so as to form two types of large and small outer diameter portions (the large diameter portion is on the base end side, and the small diameter portion is on the distal end side). Side), two concave portions are formed for each of the large-diameter portion and the small-diameter portion, and each of these concave portions is provided between the fitting portion 51b and the inner peripheral surface of the pipe portion 2. A sealing means S (specifically, an O-ring) which is present and maintains the airtightness in the pipe portion 2b is engaged. In the present embodiment, the fitting portion 51b corresponding to the large-diameter portion of the two-stage structure is formed in a state where the sealing means S is interposed on the inner peripheral surface of the pipe portion 2b. It is to be fitted.

The tubular body 5 has an airtightness inspection hole 51 functioning as a fluid introduction part when performing an airtightness inspection at a location where the branch joint 2 is attached to the gas pipe 1.
c, 51d, and 52b are provided. Specifically, the large-diameter portion of the first cylindrical body 51 and the second cylindrical body 52
Are provided with airtightness inspection holes 51c and 52b formed in the radial direction so as to communicate with each other, and are formed in the small diameter portion of the first cylindrical body 51 in the axial direction. An airtightness inspection hole 51d is provided.

In the rotating body 6, the cylindrical body 5
A male screw portion 6a which can be screwed with the female screw portion 52a is formed on an outer peripheral surface of a central portion, and the female screw portion 52a, 6a is formed.
A handle 6c for rotating the screw while screwing the gas pipe 1 is attached to the end on the base end side, and a piercing tool 7 for piercing the through-hole 1a with respect to the gas pipe 1 is provided at a portion on the tip end side. I have.

The piercing tool 7 is formed of a substantially cylindrical body, and a concave portion is formed at the tip of the substantially cylindrical body except for a thin-walled cylindrical portion, and the thin-walled cylindrical portion constitutes a blade portion 7a for piercing. are doing. In addition, a concave portion is formed at the base end portion of the substantially cylindrical body except for a thick-walled cylindrical portion, and the distal end portion of the rotating body 6 is inserted into the concave portion. An annular groove 6d is formed on the outer peripheral surface of the tip of the rotating body 6, and the annular groove 6d is formed.
The distal end of a locking member 7b mounted in an inwardly projecting state on the thick-walled cylindrical portion is engaged therewith. Further, the tip of the rotating body 6 is configured to contact the bottom of a concave portion formed at the base end of the substantially columnar body. Therefore, the rotating body 6
Is rotated to advance to the distal end side, the rotating body 6 and the piercing tool 7 are engaged by the engagement of the locking member 7b into the annular groove 6d. Tool 7
Does not rotate, and the piercing tool 7 is advanced so as to push the gas pipe 1 so as to push out the through-hole 1a.

A through-hole 6b is formed in the center of the rotating body 6 in the axial direction. A knock-out pin 10 having a spring 11 interposed therebetween is inserted into the through-hole 6b. A stopper is provided at the distal end of the knockout pin 10 for engaging and holding the scrap in the distal recess of the drilling tool 7 when the through-hole 1a is drilled, and for knocking out the scrap in a post process of the drilling. 12 are mounted.

Next, another embodiment will be described. In the case where the pipe portion 2b of the branch joint 2 has a small diameter, as shown in FIG. 3, the pipe portion 2b is divided between the small diameter portion of the fitting portion 51b of the first tubular body 51 and the outer holding members 3 and 4. By interposing a ring-shaped spacer 13 (the inner diameter of the spacer 11 is made to correspond to the outer diameter of the small-diameter pipe portion 2b), the small-diameter pipe portion 2b is attached to the outer holding members 3 and 4. Can be held and held.

Instead of rotating the rotating body 6 using the handle 6c, the rotating body 6 may be rotated by an electric device.

The branch joint 2 has the saddle-shaped portion 2a and the pipe portion 2b. The saddle-shaped portion 2a is applied to the outer peripheral surface of the pipe with a sealing member interposed therebetween. The present invention can be applied to a configuration in which the saddle-shaped portion 2a is configured to be fastened and attached to the outer peripheral surface of the pipe with a bolt or the like.

In the above-described embodiment, the present invention is applied to a case where a branch joint is connected to a branch portion of a gas pipe. However, another pipe through which a fluid flows, such as tap water, is introduced. The present invention can be applied to a case where a branch joint is connected to a branch portion of a pipe.

Incidentally, 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 a longitudinal sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II in FIG. 1;

FIG. 3 is a longitudinal sectional view showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pipe 1a Through-hole 2 Branch joint 2a Saddle-shaped part 2b Pipe part 5 Main body 52a Female screw part 6 Rotating body 6a Male screw part 7 Punch

Continued on the front page (72) Inventor Junichi Kuraya Osaka Gas Co., Ltd. 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi, Osaka (72) Inventor Takeshi Omatsu 1439-6 (Uchiko-cho, Uchiko-cho, Uchiko-cho, Kita-gun, Ehime Prefecture) 56) References JP-A-50-91886 (JP, A) JP-A-57-18909 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B23B 41/08

Claims (1)

(57) [Scope of request for utility model registration] 1. A saddle-shaped portion (2a) attached to an outer peripheral surface of a pipe (1), and the saddle-shaped portion (2a).
a) a branch joint which communicates at one end with an opening hole provided in a part of a) and is integrally provided with a pipe portion (2b) forming a branch along the radial direction of the pipe (1); (2)
Is attached to the pipe (1), a through-hole (1a) that becomes a part of a branch path is formed in a portion of the pipe (1) corresponding to the opening of the saddle-shaped portion (2a). Body (5) having a female screw portion (52a) formed on an inner peripheral surface thereof
And a male screw part (6a) that can be screwed with the female screw part (52a).
Are formed on the outer peripheral surface, and the male and female screw portions (52
a) a rotating body (6) configured to advance and retreat along the branch path by being rotated in a state in which (a) and (6a) are screwed together; A pipe drilling device comprising a drilling tool (7) rotatably linked.