JP3169126U - Steel pipe end curing tool - Google Patents

Abstract

The present invention provides a steel pipe end curing tool that has a high effect of preventing deformation of a steel pipe end and is not bulky during storage and transportation when not in use and is easy to handle. An inner surface protection plate portion that extends along an inner peripheral surface of a steel pipe end portion, an outer surface protection plate portion that extends along an outer peripheral surface of the steel pipe end portion, and a portion between both sides of the protection plate portions. An inner / outer surface protective plate 10 having a hinge portion 14 that is freely connected is provided. Further, the inner surface protection plate portion 12 and the outer surface protection plate portion 13 are configured by a rubber-like elastic plate material having a rectangular shape having a length obtained by dividing the entire circumference of the steel pipe tip, and each of the plurality of inner and outer surface protection plate materials 10 is provided on the outer surface. The protective plate portion 13 is applied to the outer peripheral surface of the steel pipe tip, and the inner surface protective plate portion 12 is applied to the inner peripheral surface of the steel tube tip in a state of being folded from the hinge portion 14 to the steel pipe inner surface side. Further, the inner surface protection plate portions 12 and the outer surface protection plate portions 13 that are adjacent to each other are connected to each other via a connector 20. [Selection] Figure 1

Description

  The present invention relates to a steel pipe end curing tool that prevents deformation of an end of a steel pipe that is axially added by welding.

  In general, a steel pipe having a predetermined length which is added in the axial direction by welding has a tapered weld surface in which the outer surface side is formed in a tapered shape at the end of one of the steel pipes 1 to be welded to each other as shown in FIG. 3 is formed, and the tip of the other steel pipe 2 is joined in abutting arrangement on the welding surface 4 formed at a right angle to the end surface of the other steel pipe 2, and the inside of the groove 5 formed on the outer peripheral side of the tapered welding surface 3 is filled with the weld metal 6. However, the steel pipes 1 and 2 are welded together (for example, Patent Document 1).

  The end of such a steel pipe is likely to be deformed due to collision with other parts during suspension movement operation with a crane or during transportation and temporary placement, and once the deformation occurs, the roundness can be easily corrected. There is a problem that it becomes difficult and the welding surface is displaced, so that desired welding cannot be performed.

  In order to prevent such deformation of the end portion of the steel pipe, conventionally, a curing method has been adopted in which a wood or steel material having a length approximately equal to the inner diameter of the steel pipe is fitted into the end portion.

  In addition to this, a locking portion is formed by cutting and raising the top plate larger than the outer diameter of the steel pipe tip, and the top plate is attached to the end of the steel pipe by press-fitting the locking portion into the steel pipe. A cover for a steel pipe has been developed (for example, Patent Document 1).

JP-A-6-246488 JP 2004-52240 A

  However, in the curing method using the conventional deformation prevention tool made of wood or steel as described above, the deformation prevention tool may damage the base material of the steel pipe, and the protection of the end of the steel pipe is not sufficient. There was a problem that it was easily deformed by the collision.

  In addition, since the cap as in Patent Document 2 described above needs to have the outer diameter of the top plate equal to or larger than the outer diameter of the steel pipe, the outer diameter of the cap must be increased as the steel pipe diameter increases. There was a problem that it was inconvenient to store and transport the cap itself.

  In view of such problems, the present invention has been made for the purpose of providing a steel pipe end curing tool that is highly effective in preventing deformation of a steel pipe end, is not bulky, and is convenient for storage when not in use and handling during transportation. It is.

  In order to solve the conventional problems as described above and achieve the intended purpose, the feature of the device according to claim 1 is that an inner surface protection plate portion along the inner peripheral surface of the steel pipe end portion, and the steel pipe end portion. Comprising an inner and outer surface protection plate material having an outer surface protection plate portion that extends along the outer peripheral surface and a hinge portion that is foldably connected between one side of the two protection plate portions, the inner surface protection plate portion and the outer surface protection plate portion, A rubber-like elastic plate material having a rectangular shape with a length obtained by dividing the entire circumference of the steel pipe tip is divided into a plurality of the inner and outer surface protection plate materials, respectively, and the outer surface protection plate portion is applied to the outer peripheral surface of the steel pipe tip, The inner surface protection plate portion is folded from the hinge portion to the inner surface of the steel pipe and applied to the inner peripheral surface of the steel pipe tip, and the adjacent inner surface protection plate portions and the outer surface protection plate portions are connected to each other via a connector. So as to cover the tip of the steel pipe There is a steel pipe end curing tool.

  The invention according to claim 2 is characterized in that, in addition to the structure of claim 1, the invention is mounted across the inner surface of the steel tube tip covered with the inner and outer surface protection plate material, and at the center of the tip of the steel tube. The present invention is provided with an inner surface side reinforcing material composed of a plurality of cross-shaped cross members.

  According to a third aspect of the present invention, in addition to the structure of the first or second aspect, the inner surface protection plate portion and the outer surface protection plate portion are formed of a single rubber-like elastic plate material having a rectangular shape, The hinge part is constituted by a linear groove formed on the surface of the central part of the rubber-like elastic plate.

  The feature of the invention described in claim 4 is that, in addition to the configuration of claim 2, the inner surface side reinforcing member is combined so that the central portion of the two beam members can be disassembled, An extension part that is in contact with the front end surface of the steel pipe that is covered with the inner and outer surface protection plate material, and an inner surface contact part that is formed in a step-like arrangement with respect to the extension part are integrally provided. is there.

  In the steel pipe end curing tool according to the present invention, an inner surface protection plate portion along the inner peripheral surface of the steel pipe end portion, an outer surface protection plate portion along the outer peripheral surface of the steel pipe end portion, and both of the protection plate portions. Uses a plurality of inner and outer surface protection plate materials that have hinges that are foldably connected between one side, and when installed, it is folded so that the thick part at the end of the steel pipe is sandwiched between them, making it easy to operate In addition, the inner and outer surfaces of the steel pipe tip are protected by elastic materials, and even if a collision occurs accidentally when handling or transporting with a crane, the effect of absorbing the impact is enhanced and deformation occurs. Can be effectively prevented.

  In addition, the inner and outer surface protection plate material has a length that divides the entire circumference of the steel pipe tip into multiple parts, so when not in use, it is a fraction of the size in use and is convenient for handling during transportation and storage. is there.

  Further, in the present invention, the inner surface side reinforcing material comprising a plurality of cross-shaped members that are mounted across the inner surface of the tip of the steel pipe covered with the inner and outer surface protection plate material and intersect at the center of the tip of the steel pipe By using this together with the inner / outer surface protection member, deformation can be prevented more effectively by the impact absorption by the inner / outer surface protection plate material and the enhancement of the repulsive force against the impact by the inner surface side reinforcing material. Further, in the present invention, the inner surface protection plate portion and the outer surface protection plate portion are formed by a single rectangular rubber-like elastic plate material, and the linear recess formed on the central portion surface of the rubber-like elastic plate material. By forming the hinge part with a groove, it is easy to manufacture the inner / outer surface protection member, the cost does not increase, and the tip of the steel pipe is protected by the plate material constituting the hinge part, and the taper is tapered. It is more effective to protect the end of the welding.

  Furthermore, in the present invention, the inner surface side reinforcing material is combined so that the central portion of the two beam-like members can be disassembled, and the tip of the beam-like material is applied to the tip surface of the steel pipe covered with the inner and outer surface protection plate material. By integrally configuring the contacted extension part and the inner surface abutting part formed in a step-like arrangement with respect to the extension part, it can be handled as one piece of bar-like material when not in use. Convenient for storage and transportation.

It is a perspective view of the state where the steel pipe end portion curing tool according to the present invention is attached to the tip of the steel pipe. It is a perspective view which shows the expansion | deployment state of the inner / outer surface protective material of a steel pipe end part curing tool same as the above. It is a disassembled perspective view which shows the same inner surface reinforcing material. It is sectional drawing which shows the connection state of the connector currently used for the steel pipe end part curing tool shown in FIG. FIG. 1 shows a state of mounting the inner and outer surface protection plate material of the steel pipe end curing device shown in FIG. 1, (a) is a partial cross-sectional view of a state where the outer surface protection plate portion is mounted on the outer peripheral surface of the steel pipe, and (b) is inner surface protection. It is a fragmentary sectional view in the state where a board part was folded up to the steel pipe tip inner surface side. It is sectional drawing which shows the butt welding part of the conventional steel pipe.

  Next, a steel pipe end curing tool according to the present invention will be described based on an embodiment shown in the drawings.

  This steel pipe end portion curing tool is composed of an inner / outer surface protective plate 10 and an inner surface side reinforcing material 11 having a length obtained by dividing the entire circumference of the steel pipe tip.

  As shown in FIGS. 1 and 2, the inner and outer surface protection plate material 10 includes an inner surface protection plate portion 12 that extends along the inner peripheral surface of the steel pipe end portion, and an outer surface protection plate portion 13 that extends along the outer peripheral surface of the steel pipe end portion. , And a hinge portion 14 that is foldably connected between the sides of the protective plate portions 12 and 13. Both protection plate parts 12 and 13 are formed in a rectangular plate shape with a rubber-like elastic plate material such as rubber or synthetic rubber, and a hinge part 14 is interposed between the long sides of the rectangles of both protection plate parts 12 and 13. ing.

  The inner / outer surface protective plate 10 of this embodiment is formed with a straight groove 15 on the surface of the central portion of one rectangular rubber-like elastic plate, the straight groove 15 serving as a hinge portion 14, and both sides thereof. These rubber-like elastic plates are used as an inner surface protection plate portion 12 and an outer surface protection plate portion 13.

  Although not shown in the drawing, the inner and outer surface protection plate members 10 are formed by separately forming the inner surface protection plate portion 12 and the outer surface protection plate portion 13 and connecting the two protection plate portions 12 and 13 with a hinge having a mechanical structure. May be configured.

  In order to connect the inner surface protection plate portion 12 and the outer surface protection plate portion 13 between the inner surface protection plate portion 12 and the outer surface protection plate portion 13 of the inner and outer surface protection plate material 10 adjacent to each other when the steel tube A is mounted. The connecting tools 20A and 20B are provided.

  As shown in FIGS. 2 and 4, the connecting tools 20 </ b> A and 20 </ b> B include an elastic connecting belt 21 having one end fixed to one inner surface protection plate portion 12 and the outer surface protection plate portion 13, and the belt 21. It is composed of a hook-shaped metal fitting 22 fixed to the tip, and a hook metal fitting 23 fixed to the other inner surface protection plate portion 12 and the outer surface protection plate portion 13 adjacent to each other. The bracket 22 is connected by being hooked on the latch bracket 23.

  In addition to the above, various types of couplers such as those having the same structure as the buckle used to stop the belt and the belt used for clothes or bags can be used.

  As shown in FIG. 3, the inner surface reinforcing member 11 includes two crosspieces 30 made of wood or steel, and each crosspiece has a tip end surface of a steel pipe A covered with inner and outer surface protection plate members 10 at both ends. And an inner surface abutting portion 32 formed in a stepped manner with respect to the extension portion 31.

  The crosspieces 30 are formed with notches 33 that are alternately combined at the center portion, and the crosspieces 30 are combined in an orthogonal arrangement via the cutouts 33 and can be disassembled. .

  As shown in FIG. 5 (a), when using the steel pipe tip portion curing tool configured in this way, the required number of outer surfaces are spread in a state where both protective plate portions 12 and 13 are flatly arranged. The protection plate 13 is placed along the outer periphery of the tip of the steel pipe A, covers the entire outer surface of the tip of the steel pipe, and the adjacent outer protection plates 13, 13 are connected by the connector 20A.

  After the outer surface protection plate portion 13 is attached to the steel pipe A in this manner, the inner surface protection plate portion 12 is folded from the hinge portion 14 to the inner surface side of the steel pipe A, so that the inner end of the steel tube as shown in FIG. The inner surface protection plate portion 12 is applied along the peripheral surface. In this state, the inner surface protection plate portions 12 and 12 adjacent to each other are connected by the connector 20B so that the folded state of the inner surface protection plate portion 12 is maintained.

  Next, the two cross-shaped members 30 of the inner surface reinforcing member 11 are arranged orthogonally to each other at the notch 33 at the center thereof, and in this state, the inner surface contact portion 32 at the tip of each cross-shaped member 30 is protected on the inner surface. It pushes into the front-end | tip part of the steel pipe A by which the inner peripheral surface was coat | covered with the member 13, and the extension part 31 is contact | abutted to the front-end | tip of the same steel pipe A, and thereby both crosspiece | staff-like materials 30 are also between the front-end | tip inner peripheral surfaces of the steel pipe A Put it on.

  In some cases, only the inner / outer surface protection member 10 may be used without using the inner surface reinforcing member 11.

  In the steel pipe tip curing tool configured as described above, by using a plurality of plate-like inner and outer surface protection members 10 that are flattened as a whole, the inner and outer surfaces at the tip of the steel pipe A are covered, The shape of each inner / outer surface protection member 10 can be reduced, which is convenient for handling when not in use.

  Moreover, since the inner surface protection plate part 12 and the outer surface protection plate part 13 are folded from the hinge part 14 at the time of mounting, and the thick part at the tip of the steel pipe A is sandwiched between both protection plate parts, the steel pipe The inner and outer surfaces of the tip are protected by a rubber-like elastic plate, and even if a collision occurs accidentally during handling by a crane or during transportation, the impact can be absorbed and deformation can be effectively prevented.

Further, by using the inner surface reinforcing member 11 in combination, the deformation can be more effectively prevented by the impact absorption by the inner and outer surface protection plate material 10 and the repulsion force against the impact by the inner surface side reinforcing material 11. By using it together, the effect of absorbing the impact from the outer peripheral surface is enhanced, and the higher the change

  Further, as in the present embodiment, a linear concave groove 15 is formed in the center of one rectangular rubber-like elastic plate member, and the linear concave groove 15 is used as a hinge portion 14, and rubber elastic elastic on both sides thereof. By making the plate material the inner surface protection plate portion 12 and the outer surface protection plate portion 13, manufacture is easy and the tip of the steel pipe A is also protected by the plate material constituting the hinge portion 14, and the taper shape is tapered. It is effective for protecting the welding end.

A Steel pipe 10 Inner / outer surface protection plate material 11 Inner surface side reinforcing member 12 Inner surface protection plate portion 13 Outer surface protection plate portion 14 Hinge portion 15 Straight groove 20A, 20B Connecting tool 21 Connecting belt 22 Hook-shaped metal fitting 23 Latching metal fitting 30 Material 31 Extension part 32 Inner surface contact part 33 Notch part

Claims (4)

An inner surface protection plate portion along the inner peripheral surface of the steel pipe end portion, an outer surface protection plate portion along the outer peripheral surface of the steel pipe end portion, and a hinge portion that is foldably connected between one side of the both protection plate portions. Having inner and outer surface protection plate material having,
The inner surface protection plate portion and the outer surface protection plate portion are configured with a rubber-like elastic plate material having a rectangular shape with a length obtained by dividing the entire circumference of the steel pipe tip.
A plurality of the inner and outer surface protection plate members are respectively applied to the outer peripheral surface of the steel tube tip, and the inner peripheral surface of the steel tube tip is folded from the hinge portion to the inner surface of the steel pipe. A steel tube end curing tool that covers the tip of the steel pipe by connecting the inner surface protection plate portions and the outer surface protection plate portions that are adjacent to each other via a connection tool.   2. An inner surface side reinforcing material comprising a plurality of cross-shaped members that are mounted across the inner surface of the steel pipe tip covered with the inner and outer surface protection plate material and intersect at the center of the tip of the steel pipe. Steel pipe end curing tool described in 1.   The inner surface protection plate portion and the outer surface protection plate portion are formed by a single rectangular rubber-like elastic plate material, and the hinge portion is formed by a linear concave groove formed in the central portion surface of the rubber-like elastic plate material. The steel pipe end part curing tool according to claim 1 or 2 comprising. The inner surface side reinforcing member is a releasable combination of the center portions of the two cross-shaped members, and an extension portion that is in contact with the front end surface of the steel pipe covered with the inner and outer surface protection plate material at the front end of the cross-shaped member The steel pipe end portion curing tool according to claim 2, wherein the steel tube end portion curing tool is integrally provided with an inner surface abutting portion formed in a step-like arrangement with respect to the extension portion.

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