JPH0214937Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] Industrial application field The present invention relates to an apparatus for joining pipe bodies such as gas pipes.

2. Description of the Related Art In general, in the case of a pipe such as a gas pipe, as shown in _FIG . The flange P of the existing pipe P and the tightening flange F are integrally connected with bolts B, with the spring R, O-ring O, and square rubber Q sandwiched in an airtight state. , After inserting the backup spring R, use the inserter to insert the O-ring O.
need to be pushed in.

For this reason, conventional inserters have been designed to insert a bolt between the bolt hole p' of the flange p of the existing pipe P, and push in an O-ring O or the like while tightening the bolt.

Problems that the invention aims to solve However, in order to push in the O-ring O evenly with a conventional inserter, it is necessary to alternately tighten the diagonal bolts among the multiple bolts placed on the flange. Not only is this work laborious and time-consuming, but it is also easy to skip this work, resulting in incomplete joints, and
- If the load is not applied evenly to the ring, the specified torque (for example, 900 kg cm) cannot be obtained, and if it is incomplete, it has to be redone.

[Structure of the invention] Means for solving the problems In order to solve the problems of the conventional inserter described above, the pipe joining device of the invention is slidably fitted into the attached pipe and prevents the expansion of the existing pipe. An inserter having a pushing part and a guide hole for pushing an O-ring into the radial end, a support that has a slide rod inserted into the guide hole in a slidable manner and comes into contact with the back surface of the flange of the existing pipe; a linkage having an actuation arm rotatably connected to an outer end of the support; and at least two notched engagement portions pivotally connected to the actuation arm and selectively engaged with engagement pins of the inserter; It is characterized by the following structure.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

In Figures 1 and 2, 1 is an inserter, which is divided into semicircular shapes on the left and right sides of a connecting pin 2, and is connected in an annular manner by a connecting pin 3 when fitting into the mounting pipe P'. I'm starting to do that. There are two upper and lower guide holes 1 on both sides of the inserter 1.
A is drilled in it, and a slide rod 4 is inserted into it.
is designed to be slidably inserted.

The slide rod 4 is also adapted to be inserted into a bolt hole p' (see FIG. 5) of the flange p of the existing pipe P, and its base end is planted in an arcuate support 5.

The lower end of the actuating arm 6 is pivotally attached to the outer end of the support 5, so that the actuating arm 6 can rotate about the fulcrum 6a. The upper parts of the left and right actuating arms 6 are bent inward to form an integral structure, and a handle 7 is attached to the center thereof. A base end portion of a linkage 8 is rotatably attached to a pivot portion 8a in the middle of the actuating arm 6 close to the fulcrum 6a.

The linkage 8 has two notch engaging portions 8b,
8c is formed to selectively engage with an engagement pin 9 protruding from the side of the inserter 1. A pressing spring 10 is also attached to the operating arm 6, and elastically urges the linkage 8 in a counterclockwise direction to ensure that the notch engaging portion 8b or 8c is securely engaged with the engaging pin 9. We ensure that the

Since the tube joining device of this embodiment is configured as described above, when pushing the O-ring O, first remove the notch engaging portion 8b or 8c of the linkage 8 from the engaging pin 9, and then Pull out the pin 3, open the inserter 1 to the left and right, and fit it into the mounting pipe P'.

Next, insert the slide rod 4 into the bolt hole p' of the flange p of the existing pipe P and the guide hole 1a of the inserter 1.
At the same time, as shown in FIG. 1, the notch engaging portion 8b of the linkage 8 is engaged with the engaging pin 9 to set it.

In this state, hold the handle 7 and press the operating arm 6.
When the actuating arm 6 is rotated in the direction of the arrow in FIG. Pull Sertor 1 from the virtual line position to the solid line position. The inserter 1
While sliding along the slide rod 4, its pushing portion 1b enters the enlarged diameter end _P1 of the existing pipe P, and pushes the O-ring O inward.

Next, as shown by the imaginary line in FIG.
When you push back the inserter 1, the inserter 1 has been pulled slightly to the right in the previous operation, so the engagement pin 9
is approaching the fulcrum 6a of the actuating arm 6, and the engagement pin 9 disengages from the notch engagement portion 8b of the linkage 8 and engages with the notch engagement portion 8c near the pivot portion 8a.

In this state, when the handle 7 is again pulled in the direction of the arrow in FIG. 4 to the solid line position, the inserter 1 is further retracted and the O-ring O is pushed deep into the enlarged diameter end _P1 of the existing pipe P.

When the pushing operation is completed, remove the notch engagement portion 8c of the linkage 8 from the engagement pin 9, pull out the engagement pin 3, open the inserter 1, remove it from the mounting pipe P', and then remove the tightening flange as appropriate. The bolts are finally tightened to complete the connection.

[Effects of the invention] As described above, the present invention operates the inserter using a link mechanism composed of an operating arm, a slide rod, and a linkage, and the linkage is provided with a plurality of notched engagement portions. This has the advantage that the angle of the linkage can be kept low, that it is possible to push in extremely lightly with a very small force by repeating the pushing operation several times, and that the overall linkage mechanism can be made compact.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of the present invention, Fig. 2 is a front view thereof, Figs. 3 and 4 are explanatory diagrams showing the operating state, and Fig. 5 is a partial cross-sectional view showing the joint state of the pipes. It is. 1...Inserter, 1a...Guide hole, 1b
... Pushing part, 2 ... Connection pin, 3 ... Connection pin,
4...Slide rod, 5...Support, 6...
Operating arm, 6a... Fulcrum, 7... Handle, 8
...Linkage, 8a...Pivot joint, 8b, 8c...
...Notch engagement part, 9...Engagement pin, 10...Press spring, P...Existing pipe, P' mounting pipe, p...Flange,
O...O-ring.

Claims (1)

[Scope of utility model registration request] An inserter that is slidably fitted into the mounting pipe and has a pushing part and a guide hole for pushing the O-ring into the expanded diameter end of the existing pipe, and a slide rod that is slidably inserted into the guide hole are installed. a support that is installed and comes into contact with the back side of the flange of the existing pipe; an actuation arm rotatably pivoted to the outer end of the support;
A tube joining device comprising a linkage pivotally connected to the actuation arm and having at least two notched engagement portions that selectively engage engagement pins of the inserter.