JP2791491B2 - Pipe end face protection device and its mounting method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method of attaching a pipe end face protector used to protect an end face of a pipe such as a steel pipe.

[Conventional technology]

As a conventional pipe end face protector, there is known a pipe end face protector described in Japanese Utility Model Publication No. 57-35017, and as shown in FIG. Cylindrical body 11
A flange 12 is provided on one end surface of the
A plurality of punching claws 14 are raised so that 13 faces the flange side, and a cut 15 is provided in a part of the short cylindrical body 1, and a curved chevron 16 is provided in the cut 15. .

When the pipe end face protector 10 is used, the receiving is usually performed by using the punching claw 14, but when the punching claw 14 does not perform sufficient tightening, the chevron 16 is used.
The pipe end face protector 10 is fixed to the pipe 17 by tapping the pipe end with a wooden hammer or the like.

[Problems to be solved by the invention] However, pipes are usually manufactured based on the outer diameter,
If the thickness is different, the inner diameter will be greatly different,
Although the pipe end face protector 10 can be used for pipes having substantially the same inner diameter, there is a problem that it cannot be used as a pipe end face protector for pipes having different inner diameters because the pipes have different wall thicknesses.

The present invention has been made in view of such circumstances, and provides a method of attaching a pipe end face protector that has a fixed adjustment width and is easy to attach and detach even for tubes having slightly different inner diameters. With the goal.

[Means for solving the problem]

The mounting method of the pipe end face protection device according to claim 1, which meets the above object, is characterized in that a flange is formed at one end, and via a supporting member that protrudes inside the joining portion of the cylindrical body where the joining portion is movably overlapped. After attaching the pipe end face protective device having the joint piece facing and overlapping to the end of the tube to be protected, the cylinder is opened and closed by the cylinder in the inner space formed by the opposed support member and the joint piece. The moving piece forming the left and right pair is inserted, the moving piece forming the left and right pair is expanded, and the joining piece to be superimposed has a pressing claw in a state where the tubular body is pressed and fixed inside the tube. It is fixed by mesh fixing means.

[Action]

In the method of attaching a pipe end face protector according to claim 1, the joining portion of the tubular body of the pipe end face protector is movably overlapped, and the inside of the joined portion is opposed and overlapped via a support member. Since the piece is formed, after expanding the portion of the support member with a jig, and fixing the joining piece, it becomes possible to expand and contract a wide outer diameter of the pipe end face protection device, thereby changing the wall thickness. Even in the case of a pipe, it becomes possible to mount the pipe end face protection device according to the inner diameter.

Then, into the inner space formed by the opposing support member and the joining piece, a pair of left and right moving pieces driven to be opened and closed by a cylinder is inserted, and the left and right pair of moving pieces are expanded to form a cylindrical body. Since the polymerized piece to be polymerized is fixed by meshing fixing means having a pressing claw in a state of being fixedly fixed to the inside of the tube, the operation is extremely simple. The outer diameter is determined.

〔Example〕

Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention.

FIG. 1 is a perspective view of a pipe end face protector used in one embodiment of the present invention, FIG. 2 is a partial sectional view of the same, FIG. 3 is a partial perspective view of the same, and FIG. FIG. 5 is a plan view of the jig for attaching the jig to the tube, FIG. 5 is a plan view of the jig, and FIG.

As shown in FIG. 1 and FIG. 2, the pipe end face protector 20 used in one embodiment of the present invention is formed of a normal iron plate having a thickness of about 0.8 to 1.6 mm, and has a short joint 21 and 22 which are overlapped. A flange 24 is formed by bending at the end of the cylindrical body 23, and bonding pieces 27 and 28 are extruded and formed by press working at the joints 21 and 22 of the cylindrical body 23 via support members 25 and 26, respectively. ing.

The diameter of the tubular body 23 is determined in the vicinity of the inner diameter of the pipe 29 to be protected, and the overlapping portions 21 and 22 are slid so as to match the inner diameter of the pipe 29. Shall be

The support members 25 and 26 have a strut 30 and 31 respectively at the center, and even if the support members 25 and 26 are expanded laterally by moving pieces 32 and 33 as shown by a two-dot chain line in FIG. Support member 25,
26 does not bend with respect to the cylindrical body 23.

Next, the pipe end face protector 20 shown in FIGS.
The jig 34 attached to the end of the jig will be described.
Is expansion means 35 for moving the left and right moving pieces 32 and 33 in the horizontal direction.
And a meshing and fixing means (usually also referred to as a sealer) 36 for fixing the joined joint piece in the expanded state.

The extension means 35 attaches moving pieces 32, 33 via mounting hardware 40, 41 to a cylinder 39 (any of hydraulic, pneumatic, and electric motors) having output shafts 37, 38 on both sides on the output side. The output shafts 37 and 38 expand and contract by the signal, and the moving piece 32,
33 expands and contracts left and right.

A mesh fixing means 36 is attached to a mounting base 42 of the cylinder 39 via support members 43 and 44.The mesh fixing means 36 includes an upper cylinder 45 and a link mechanism 46 driven by the cylinder 45. Pressing claws 47, 48 arranged side by side through rotation, and a holding fitting 49 abutting on the joining piece 27, and in a state where the joining piece 27 is in contact with the holding fitting 49. By driving the cylinder 45, the pressing claws 47, 48 are rotated, a part of the joining piece 27 is cut out and pressed against the holding metal fitting 49, and partially bent from both sides as shown in FIG. It has become.

Therefore, using this jig 34, the pipe end face protection device 20
When the pipe end face protector 20 is attached to the pipe 29, the pipe end face protector 20 is previously fitted to the inside of the pipe 29, and then the jig 34 is used. Then, the distal ends of the moving pieces 32 and 33 are inserted, and the cylinder 39 is driven so that the moving pieces 32 and 33 are expanded laterally and the support members 25 and 26 are expanded laterally.

As a result, the joints 21 and 22 of the tubular body 23 slide and move, and the entire diameter is enlarged, so that the pipe end face protection device 20 is fitted into the inside of the pipe 29 in a pressed state.

Next, when the cylinder 45 is driven in a state where the holding fitting 48 is pressed against the upper joint piece 27 using the mesh fixing means 36, the pressing claws 47, 48 rotate and overlap with the lower joint piece 28. The upper joint piece 27 is simultaneously pressed and cut, and the upper joint piece 27 is pressed and bent to fix the joint pieces 27 and 28 together.

Thereafter, the mesh fixing means 36 is released, the moving pieces 32 and 33 are loosened, and the jig 34 is pulled out.

In this embodiment, the jig 34 integrated as described above is used.
Are used to fix the joining pieces 27 and 28, but the expanding means and the meshing fixing means may be separate devices or jigs.

When removing the pipe end face protector 20 from the pipe 29, a rod or the like is inserted inside the fixed joint pieces 27 and 28 so that the joint piece 2
If the tubes 7 and 28 are bent inward, the diameter of the tubular body 23 is reduced, and the tubular body 23 is easily removed from the end of the tube 29.

〔The invention's effect〕

The mounting method of the pipe end face protection device according to claim 1, wherein the movable member driven by the cylinder expands the support member protruding from the joint portion of the cylindrical body, so that the entire diameter is increased, and further, the joint member is superimposed. Is fixed by the engagement fixing means having the pressing claw, the joining piece can be easily fixed, so that the operation is extremely easy and automation can be performed using a simple jig.

Then, when removing the attached pipe end face protector from the pipe, insert a rod or the like inside the fixed joint piece and bend it inward to reduce the diameter of the tubular body. The pipe end face protector thus obtained can be easily removed without requiring any special tool or jig.

[Brief description of the drawings]

1 is a perspective view of a pipe end face protector according to an embodiment of the present invention, FIG. 2 is a partial sectional view of the same, FIG. 3 is a partial perspective view of the same, and FIG. Jig side view, 5th
FIG. 6 is a plan view of the same, FIG. 6 is a partial front view of the same, and FIG. 7 is a perspective view of a conventional pipe end face protector. [Explanation of Reference Codes] 20 pipe end face protector, 21, 22 joint, 23 tubular body, 24 flange, 25, 26 support member, 27, 28 joint piece, 29 ... tube, 30, 31 ... strut, 32, 33 ... moving piece, 34 ... jig, 35 ... expansion means, 36 ... meshing fixing means, 37, 38 ... output shaft, 39 ... … Cylinders, 40, 41 ……
Mounting hardware, 42 ... Mounting base, 43, 44 ... Support member,
45 …… Cylinder, 46 …… Link mechanism, 47, 48 …… Pressing claw, 49 …… Holding bracket

──────────────────────────────────────────────────続 き Continuing the front page (72) Inventor Hajime Nimura 1-1-1 Edamitsu, Yawatahigashi-ku, Kitakyushu-city, Fukuoka Prefecture Inside Nippon Steel Corporation Yawata Works (56) References , U) J. 30-13100 (JP, Y1) (58) Fields investigated (Int. Cl. ⁶ , DB name) F16L 57/00 B65D 59/06 B25B 27/14 B25B 27/02

Claims (1)

(57) [Claims] 1. A tube end face protection having a flange formed at one end and having a joining piece which is opposed to and overlaps via a protruding support member inside a joining portion of a cylindrical body in which a joining portion is movably overlapped. After the tool is attached to the end of the tube to be protected, the left and right pair of moving pieces driven to be opened and closed by a cylinder are inserted into an inner space formed by the opposing support member and the joining piece, A pipe end face wherein the joining piece to be superimposed is fixed by meshing fixing means having a pressing claw in a state where the moving pieces forming the left and right pair are spread and the cylindrical body is pressed and fixed inside the pipe. How to install protective equipment.