JPH032789Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a sash pipe centering device used for centering sash pipe work performed when connecting a newly installed pipe to an existing pipe such as a buried pipe.

[Conventional technology]

Conventionally, in order to connect the existing pipe and the new pipe by inserting a sash pipe between the existing pipe and the new pipe at a buried pipe construction site, as shown in FIG. point a1 and the pipe end 38 of the newly installed pipe 37
A water thread 45a is stretched between two points a, and a metal ruler 46 is applied at right angles to the stretched water thread 45a as shown in FIG. 6, and the gap width a1W at point a1 is measured.
This gap width a1W is marked at point b1 on the opposite side of the tube end 36, the gap width b2W at point b2 is similarly measured, and this gap width b2W is marked at point a2.

Next, a water thread 45b is stretched between points b1 and b2, a metal ruler 46 is applied to this water thread 45b, the gap widths a1W and b2W are measured, and the metal ruler 46 is applied to the water thread 45a. Confirm that there are no errors in the measured value by comparing it with the measured value.

Similarly, c between point a1 and point b1 of the tube end 36
1 point and d1 point and c2 point and d between the pipe end portions 38
Water strings 45c and 45d (not shown) are stretched between the two points, and the gap widths at points c1, d1, c2, and d2 are measured and marked, and the gap widths are confirmed.

Next, a metal strip is wrapped around the tube ends 36, 38, and a cutting line is marked on the outer peripheral surface of the tube ends 36, 38 in line with the marked points on the sides of the strip.

Next, the pipe end 36 of the existing pipe 35 and the pipe end 38 of the new pipe 37 are cut with a fusing cutter along the marked lines, and a grinder is used to cut between a1 and a2.
Finish so that each length L between 1 and b2, between c1 and c2, and between d1 and d2 is constant.

Next, as shown in Fig. 7, measure the length L, create a sash pipe 39 with a length shorter than this length L by the gap dimension (usually 2 to 6 mm), and connect the existing pipe 35 and the new pipe 37. Insert and fix between each pipe end 3
6, 38 and the sash pipe 39 are welded.

[Problem that the invention attempts to solve]

The conventional means shown in FIGS. 5 to 7 requires tensioning of the water line 45 and use of a wire rod 46, which makes it difficult for one person to work and requires skill.

In addition, since cutting follows lines marked on the tube ends 36 and 38, an automatic bevel cutting machine cannot be used, the cut surfaces are uneven, and it takes time to finish with a grinder, and furthermore, the overall work time is increased. In the case of pipes buried under the road surface, they became a hindrance to traffic.

This invention was made in view of the above matters,
To provide a sash tube centering means that can be easily operated by one person in a short period of time.

[Means for solving problems]

In the present invention, a slide shaft 7 is telescopically inserted into a fixed shaft 1, and a stopper 2 is provided on the fixed shaft 1 to fix the slide shaft 7 at a desired position with respect to the fixed shaft 1. Copying rings 10, 10 are attached to the outer ends of the slide shaft 7, respectively, and the copying rings 10, 10 are attached to the outer ends of the slide shaft 7, respectively.
2 is provided so as to be perpendicular to the center lines of the fixed shaft 1 and the slide shaft 7, and the center lines of the copying rings 10 and 10 are aligned, and supported by the fixed shaft 1 and the slide shaft 7. Legs 16,1
6 was attached so that the fixed shaft 1 and the slide shaft 7 could be held to form a sash tube centering device.

[Effect]

The sash pipe centering device of the present invention is arranged between the pipe end 36 of the existing pipe 35 and the pipe end 38 of the newly installed pipe 37, as shown in FIG.
The fixed shaft 1 and the slide shaft 7 are adjusted for expansion and contraction so that the ends 0 face the pipe ends 36, 38 with a slight gap, and are fixed with the stopper 2. Then, the center of the copying rings 10, 10 A sash tube centering device is installed using a metal ruler 46 or the like so that it coincides with the center of the end portions 36 and 38.

Next, as shown in FIG. 4, the automatic cutting machine 50 is attached to the outer periphery of the pipe, and installed so that the automatic cutting machine 50 can rotate around the outer periphery of the pipe. 10, and the pipe ends 36, 3 are brought into contact with
Fuse 8. This fusing occurs when the copying roll 52 is guided by the end face 12 of the copying ring 10 and moves parallel to the end face 12, and the nozzle 53 is moved between the pipe ends 36 and 3.
8 is fused and cut in a plane parallel to the end surface 12 of the copying ring 10.

〔Example〕

Figures 1 and 2 show an embodiment of the present invention, in which a slide shaft 7 is telescopically inserted into a fixed shaft 1 formed in a tubular shape, and the slide shaft 7 is inserted into the fixed shaft 1. A fastener 2 that can be fixed at a desired position is provided on the fixed shaft 1, and this fastener 2
Insert the bolt 4 into the fixing nut 3 welded to the outside of the fixed shaft 1, make the tip of the bolt 4 face inside the fixed shaft 1, and insert the bolt 4 into the slide shaft 7 with the tip of the bolt 4.
It is designed to be held in place by holding it in place.

Further, the bosses 11, 11 of the copying rings 10, 10 are screwed to the outer ends of the fixed shaft 1 and the slide shaft 7, and are detachably attached thereto.
0 and 10, the end surface 12 is the fixed shaft 1 and the slide shaft 7
The fixed shaft 1 and the slide shaft 7 are provided with support legs 16, 16, respectively, so that the center lines of the copying rings 10, 10 coincide with the center lines of the copying rings 10, 10. The supporting legs 16, 16 are formed to be able to hold the fixed shaft 1 and the slide shaft 7 by attaching them to the fixed shaft 1 and the slide shaft 7.
7, 17 to be fixed at any position near the end of the fixed shaft 1 and slide shaft 7, and fixing nuts 18, 18 welded to the fixing rings 17, 17.
It is designed to be fixed with bolts 19, 19 inserted through the. Further, support rods 22, 22 are attached to the fixing ring body 17 with stud bolts 20 and nuts 21, and the support rods 22, 22 have tubular legs 22, 22 attached to them.
3 and 23 are bolts 24 and 24 and nuts 25 and 25
It can be expanded at any angle (arrow in Figure 2) and fixed, and furthermore, the tubular legs 23, 2
3 has telescopic legs 26, 26 which can be telescopically fixed by fixing nuts 27, 27 and bolts 28, 28 to which telescopic legs 26, 26 are welded.

In the embodiment described above, the copying ring 10 is detachably attached to the fixed shaft 1 and the slide shaft 7, and the copying ring 10 has an outer diameter that approximately matches the outer diameter of the existing pipe 35 and the newly installed pipe 37. This copying ring 10 is designed to be used
can also be fixed to the fixed shaft 1 and the slide shaft 7, and the fixed shaft 1 to which the copying ring 10 is fixed
It is also possible to replace the slide shaft 7 with one to which a copying ring of other dimensions is fixed. and,
The fixing rings 17, 17 may also be fixed to the fixed shaft 1 and the slide shaft 7. Furthermore, it is also possible to provide the two fixing rings 17, 17 on the fixed shaft 1, and the fasteners 2 and The bolt 19 etc. may be formed into a thumb screw type bolt 19b etc. as shown in FIG.
For the support legs 16, 16, a telescopic screw for fine adjustment formed separately from the telescopic leg 26 can be provided on the support rod 22 or the tubular leg 23.

Further, the automatic cutting machine 50 shown in FIG. A copying mechanism 51 is attached to the tube end 3 as described in the section of the operation above.
6, 38, and the cut surfaces are polished with a grinder and finished in the same manner as the conventional means shown in FIG.
A sash pipe 39 is inserted between 8 and the pipe ends 36 and 38 and the end of the sash pipe 39 are welded.

[Effect of idea]

The sash pipe centering device of the present invention is arranged between the pipe end 36 of the existing pipe 35 and the pipe end 38 of the newly installed pipe 37, and the outer circumferential surfaces 13, 13 of the copying rings 10, 10 , 38, the sash tube centering device can be installed, so it can be operated by one worker, and the copying rings 10, 10
Since the pipe ends 36 and 38 can be cut automatically using a cutting machine, the cutting work is easy and accurate, and the subsequent finishing of the cut surfaces with a grinder is also easy, making the entire work easy and short. Now I can do it.

[Brief explanation of drawings]

FIG. 1 is a front view of one embodiment of the present invention, FIG. 2 is a side view of its supporting legs, and FIGS. 3 and 4 are views showing other embodiments of the present invention and the state in which the present invention is implemented. Fifth
6 is a diagram showing an implementation state of a conventional example, and FIG. 7 is a diagram showing just before insertion of a sash tube. DESCRIPTION OF SYMBOLS 1... Fixed shaft, 2... Stopper, 7... Slide shaft, 10... Copying ring, 12... End face, 16...
...Support legs.

Claims (1)

[Scope of utility model registration request] The slide shaft 7 is telescopically inserted into the fixed shaft 1, and a stopper 2 that can fix the slide shaft 7 at a desired position with respect to the fixed shaft 1 is provided on the fixed shaft 1. Copying rings 10, 10 are respectively attached to the outer ends of the profiling rings 10, 10, and the profiling rings 10, 10 are provided so that the end surfaces 12 are perpendicular to the center lines of the fixed shaft 1 and the slide shaft 7. ring 10,
This sash tube centering device is formed such that the center lines of the sash tubes 10 are aligned, and support legs 16, 16 are attached to the fixed shaft 1 and the slide shaft 7 so that the fixed shaft 1 and the slide shaft 7 can be held.