JPS5823510Y2 - Mounting jig for welding pipe and flange - Google Patents

Description

[Detailed description of the invention] The present invention is a method for accurately positioning a flange to be welded to the cut end of a pipe to connect a pipe cut to working dimensions for pipe piping in a building. It's about the ingredients.

In order to weld flanges perpendicular to the entire circumference of the pipe or at a constant angle of inclination, conventionally spot welding or temporary welding is performed while detecting the perpendicularity or desired angle for each piece. It is very difficult and time-consuming to accurately locate the treadmill, which increases labor costs.

The present invention aims to simplify the positioning work in order to solve the above-mentioned problems when welding a flange to a pipe end.

The present invention provides three or more jig members each having a horizontal part having a reference surface to be brought into contact with the inner surface of the tube and a vertical part having a guide surface to be brought into contact with the flange end surface. All of the jig members 4 into which the parts have been inserted are interlocked and moved in the radial direction so that the reference surfaces of all the jig members are in contact with the inner surface of the pipe body, and the flange end face is brought into contact with the guide surface. The tube is positioned at a predetermined angle with respect to the tube body.

The present invention will be described in detail below based on an embodiment shown in one drawing.

In the first embodiment shown in FIGS. 1 to 4, 120
Three jig members 1 arranged in the radial direction at equal intervals of degrees,
1,1 is used, but the four jig members 1 are
Arranged at equal intervals of 0 degrees.

5, 6, etc. The number of jig members 1 to be used can be arbitrarily selected as long as it is 3 or more.

Further, it is not necessarily necessary to arrange them at equal intervals, but they may be arranged at irregular intervals such as 150 degrees, 150 degrees, and 60 degrees.

The jig member 1 includes a horizontal portion 3 having a reference surface 3a to be in contact with an inner surface 2a of a pipe body (drainage pipe, blower pipe, etc.) 2;
It stands upright from the end of the horizontal part 3 and includes an upright part 5 having a guide surface 5a to be in contact with the outer end surface 4a of the flange 4 to be welded to the pipe body, and into the end part of the pipe body 2 to which the flange 4 is to be attached. The horizontal part 3 is inserted in the radial direction, and the upright part 5 is positioned outside the edge of the tube body 2 to protrude toward the outer circumference of the tube body, and the inclination angle of the flange 4 is regulated by the guide surface 5a. be.

In order to move the three jig members 1 mentioned above in the radial direction,
In the first embodiment, there is a rotating shaft 6 located at the center, and screws a extending in opposite directions to the rotating shaft.

A pair of sliding bodies 7A, 7B are screwed together at b, and the inner ends are pivoted to either of the sliding bodies 7A, 7B c, d, and the outer ends are at the inner end of the horizontal part of the jig member 1 or Pivot e, f at the outer end
A jig moving means 10 is provided, which includes a first continuous rod 8A, a second continuous rod 5B, and a handle 9 for rotating the single rotation shaft 6.

When using the tube welding jig of this invention.

Pipe body to which flange 4 is to be welded (for building support) <Eve,
(drainage pipe, hot water pipe, cold air pipe, etc.)
As shown in the figure, the horizontal part 30 of the jig member 1 is inserted from the side from the side with the horizontal part 3 positioned on the inner side so that there is a gap between the reference surface 3a of the horizontal part 30 and the inner surface 2a of the pipe body 2. .

When the handle 9 is rotated in the state shown in FIG. 3, the sliders 7A and 7B move in the direction of the arrow and approach each other as the threaded portion of the one-rotation shaft 6 rotates.

Sliding body 7A. 7B approach each other, the jig member 1 is pushed up toward the tube inner surface 2a via the first continuous rod 8A and the second continuous rod 8B, and the horizontal portion 30 reference surface 3a of the jig member 1 is pushed up toward the tube body inner surface 2a. 2 and comes into contact with the inner surface 2a of FIG. 4, resulting in the state shown in FIG.

Since the reference surface 3a of the horizontal portion of the jig member 1 comes into contact with the inner surface 2a of the tube body, the guide surface 5a of the upright portion 5 is regulated at a predetermined angle 1, for example 90 degrees, with respect to the tube body 2.

In this state, by bringing the outer end 4a of the flange 4 into contact with the guide surface 5a of the upright portion 5 of the jig member 1, the flange 4 is positioned at the edge of the tube body 2 at a predetermined angle.

Therefore, in the state shown in FIG. 4, the lower end of the flange 4 and the tube body 2
The flange 4 is welded to the tube body 2 by spot welding or full circumference welding, or by spot welding and then welding the entire circumference.

After spot welding, by rotating the nodule 9 in the opposite direction, the horizontal part 3 of the jig member 1 is moved toward the center of the pipe, away from the reference surface 3a & the inner surface 2a of the pipe body 2, and the jig member 1
Then, the jig moving means 10 is removed from the tube body 2.

Note that by providing a support device 15, shown in FIGS. 5 and 6, in which the pressing tool 11 is pivotally supported on the upright portion 5 of the jig member 1 via arms 12, 13 and springs 14, the flange 4 can be The operator can perform welding work without holding the flange 4 by supporting it on a jig member.

Generally, the flange 4 is perpendicular to the tube body 2, but as shown in FIGS. 7 and 8, it is tilted and a non-flat flange 22 or other inclusions are inserted when connecting pipes, etc. In case you do.

The guide surface 5a of the jig member 1 also has an inclination angle other than 90 degrees, and the guide surface 5a of the jig member 1 may also have an angle other than 90 degrees with respect to the reference plane.

As described above, the present invention moves three or more jig members having a reference surface that contacts the inner surface of the pipe body and a guide surface that contacts the flange end surface in the radial direction by transmitting the jig members using the jig moving means. Because it is flexible, when connecting pipes at the work site for various piping work such as drainage pipes, air-conditioning pipes, etc., the connecting flange can be attached to the pipe body (drainage pipe, air-conditioning pipe,
This method facilitates welding work such as single point welding by positioning at a predetermined angle using simple tools and operations such as gas (e.g., Eve).

Note that the pipe body is not limited to a round pipe with a circular cross section, and the ventilation duct can also have a thin cross-sectional shape other than square or thin circular.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a tube welding jig embodying the present invention. Figure 2 is also a side view. Figure 3 shows pipe bodies (drainage pipes, etc.)
FIG. FIG. 4 is a front view similar to FIG. 3 in a positioning completed state. FIG. 5 is a side view showing an example of a support device. FIG. 6 is a side view showing the state in which the flange is supported. FIGS. 7 and 8 are schematic diagrams showing cases where the flange is attached at an angle other than 90 degrees. 1...Jig member, 2...Tube body (pipe), 3...Horizontal part, 3a...Reference surface,
4...Flange, 5...Upright part, 5a
...Guide surface, 6...Rotation axis. 7A, 7B...Sliding body, 10, 10'...
...Jig moving means, 18...Jig stand, 19...
...Screw shaft.

Claims (1)

[Claims for Utility Model Registration] A horizontal portion having a reference surface in contact with the inner surface of the pipe body and an upright portion having a guide surface in contact with the outer end surface of the flange, the reference surface and the guide surface being L-shaped. three or more jig members are provided, and the reference surfaces of the three or more jig members are positioned parallel to the rotating shaft, and at least one pair of sliding bodies screwed onto the rotating shaft are connected to the sliding body. A jig moving means is provided which is integrated with the rotating shaft via a connecting rod, each of which has one end pivoted and the other end pivoted to the tip of the horizontal part or the vertical part of the jig member. . Mounting jig for welding the pipe body and flange.