JPS6042007Y2 - Drilling machine fittings - Google Patents

Description

[Detailed explanation of the invention] This invention provides
This invention relates to a fitting for a drilling machine for drilling into existing pipes.

When a branch pipe is taken out from a gas conduit, a connector called a service cable is usually used.

There are two methods for this service tool: one is to drill a hole in the gas pipe, place a tap in the hole, and screw into the hole, and the other is to attach it to the gas pipe via a clamp.

In the present invention, the clamp attachment of the latter type of the above method is an attachment for the perforating machine (shutter device) used in the method, and is mainly used in the leak-free perforation method using the service chip.

Connect the service cable to the gas pipe using the clamp,
The conventional method of drilling without leaking is to attach a shutter device on the service tee and a drilling machine on top, open the shutter of the shutter device, insert the drill of the drilling machine into the service tee, and then connect the gas pipe to the gas pipe. After drilling is completed, the drill is pulled up and the shutter is closed at the same time as the drilling is completed to prevent gas from leaking through the service chute from all the drilled holes.

In this method, the shutter device and drilling machine are fixed on the service tee with four or two bolts extending upward from the clamp, which saves time and effort. In addition, there is a problem with airtightness, which is a bottleneck in drilling operations.

The present invention has been proposed with the aim of resolving these drawbacks, and its main structure is to provide a threaded part 2 on the outer periphery to which the mounting part of the drilling machine or the leak-free shutter device is to be attached, and to provide a 68 in the center. A main body 1 consisting of a main body 1, a stepped portion 3 formed on the lower surface of the main body 1 into which the head of a service tool fits from below, and a tip 4' located in a symmetrical position of the main body 1, with a tip 4' inside the stepped portion 3. Fixed member 4 that can be moved in and out from the horizontal direction
and a fixed nozzle 5 which is rotatably mounted on a shaft 6 at the rear of the fixed member 4 and has a cam surface 7 eccentric to the shaft 6.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

1 is a disc-shaped main body with a threaded part 2 on the outer periphery, a 68 is provided in the center, and a step on the bottom surface is larger in diameter than the 68 and into which the head of the service tool fits. Part 3 is provided.

Reference numeral 9 indicates that the shaft bearings projecting horizontally from the lower left and right surfaces of the main body 1 are arms, and in this arm, there is a tip 4' with respect to the stepped portion 3.
A fixing member 4 that can be freely moved in and out is incorporated.

5, the shaft bearing is a fixed nozzle which is rotatably attached to the arm 9 by a shaft 6, and this fixed handle 5
The shaft 6 has a cam surface 7 eccentric to the shaft 6, and when the fixed nozzle 5 is rotated horizontally, the shaft 6 and the cam surface 7 are at the minimum radius, and the fixed nozzle 5 is rotated horizontally. 90'm below
The radius becomes the maximum radius, and due to this eccentric action, the fixing member 4
The horizontal direction and chopstick movement are used.

Reference numeral 12 denotes an elastic collar inserted between the hole 5' of the fixed handle 5 and the shaft 6 when the fixed handle 5 is rotatably attached to the shaft 6, and the elastic action of this collar 12 tightens the fixed member 4. The attachment performs its action elastically.

10 is a spring that applies a force in the backward direction to the fixing member 4, and 11 is a stator of this spring 10.

In the above embodiment, both the left and right sides of the fixing member 4 can be moved in and out using the fixing handle 5, but when implementing the present invention for small diameter applications, one of the fixing members 4 is fixed in a state protruding forward. In this case, the fixed handle 5 may be omitted.

The structure of the fixture embodying the present invention is as described above. As shown in FIG.
Attach this service chip 15 as shown in Figure 4.
The stepped portion 3 of the fixture of the present invention is fitted onto the head 15' of the handle 5, and the handle 5 is rotated directly downward from the horizontal position as shown in FIG.

In this way, the fixing member 4 moves forward due to the action of the cam surface 7 of the handle 5, and its tip 4'
The fastener is fixed onto the service tee 15 by engaging the neck 15'' of the head 15'.

Then, as shown in FIG. 6, a shutter device 16 is attached to the threaded portion 2 of this fixture, and a drilling machine 17 is attached thereon to perform drilling.

Next, when removing the fixing tool from the service piece 15, rotate the fixing handle 5 horizontally in the opposite direction to the above, move the fixing member 4 backward, and insert its tip 4' into the neck 15 of the service piece 15. ” away from.

As described above, the present invention involves attaching a fixing device directly to the head 15' of the service tool 15, and attaching the shutter device and punching machine onto this fixing device, so it is easier to attach than the conventional bolt-fastening method. Alternatively, the removal work is extremely simple.

In addition, in the present invention, when the fixed handle 5 is rotatably attached to the arm 9 by the shaft 6, an elastic collar 12 is inserted between the shaft 6 and the hole 5', so that the fixed member 4 is pushed out by eccentric action. When tightening, elastic action acts on the fixing member 4, improving the fixing effect.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a fixing device embodying the present invention, Fig. 2 is a central vertical sectional view, Fig. 3 is a bottom view, Fig. 4 is a sectional view of the fixing handle with the fixing handle turned in the release direction, and Fig. FIG. 5 is a perspective view of the fixing handle, shaft and elastic collar, and FIG. 6 is a perspective view showing the inventive fixing device in use. 1...Main body, 2...Screw part, 3...
...Stepped portion, 4...Fixing member, 5...
Fixed handle, 6... shaft, 7... cam surface, 8... hole, 9... bearing is arm, 10
... Spring, 11 ... Stator, 12 ...
...Elastic collar, 13... Gas conduit, 14
... Clamp, 15 ... Service team 16 ... Shutter device, 17 ...
drilling machine.

Claims (1)

[Claims for Utility Model Registration] 1. A threaded portion 2 to which a mounting portion of a drilling machine or a non-leakage shutter device is to be attached is provided on the outer periphery, and a screw portion 68 is provided in the center.
A main body 1 having a hole formed therein; a stepped portion 3 formed on the lower surface of the main body 1 into which the head of a service tool fits from below; A fixed bundle having a fixing member 4 whose tip 4' can be freely moved in and out from the horizontal direction, and a cam surface 7 rotatably attached to the main body 1 by a shaft 6 at the rear of the fixing member 4 and eccentric with respect to the shaft 6. 5, and the attachment of the drilling machine. 2. The mounting tool for a drilling machine according to claim 1, wherein one of the fixing members 4 is fixed and the other is configured to be movable in the horizontal direction by a fixed bundle 5 having an eccentric cam surface 7.