JP2003001489A - Jig for restricting end of steel material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply correct dislocation between joining steel materials or deformation of the joined end parts in the steel materials in a short time and to prevent development of the dislocation between the joined steel materials or the deformation during welding. SOLUTION: When an H sectional steel 1 is flash-welded, restricting members 2 are inserted from both sides of flange portions at both end parts in the H sectional steel 1 set to a frame and fitted to positions apart at a constant distance from the joining end parts. Thereafter, respective wedges 6 are driven in between respective pushing members 4 in the restricting members 2 and flange portions 11 in the H sectional steel 1, and the dislocation between the joined steel materials is corrected, and centering of the joining H sectional steel 1 is performed, and the welding is applied under the state of restricting the flange portions 11 in the H sectional steel 1 with the restricting members 2 and the restrictive wedges 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig for restraining an end portion of a steel material, which is used for correcting a misalignment or a shape of an end portion to be joined, for example, when joining an H-section steel or a steel pipe, and particularly, to improve work efficiency. It is about improvement.

[0002]

2. Description of the Related Art Steel piles such as H-shaped steel piles and steel pipe piles, for example, have a large driving penetration force, reliable joint construction, and strong bending resistance against horizontal loads, so they are used for deep foundations. There is. For this reason, it is necessary to weld H-section steel or steel pipe having a unit length by welding. Further, when manufacturing a steel structure such as a bridge or a tower, steel materials such as angle steel and channel steel are welded and joined to form members such as a bridge and a tower. Although various welding methods are used to join these steel materials, the flash welding method can efficiently weld the steel materials in an extremely short time and can obtain a highly reliable welded joint. In this flash welding method, for example, a large current is applied to two H-shaped steels whose ends are clamped to heat the contact surface while repeating contact and spark misery, and when a suitable temperature is reached, a sudden pressure is applied, It is a method of press-contacting by upsetting.

When welding steel materials such as H-section steel, 2
If a welded joint with misalignment is formed by welding with the joint ends of the steel materials of this book having a misalignment, when tensile load acts on the welded joint with misalignment, bending stress is superimposed in addition to tensile stress. As a result, stress concentrates and the fracture load of the welded joint decreases. To prevent this, in the welding preparation process, 2
It is necessary to correct the misalignment of the joint ends of the steel materials of the book. As a correction jig for this misalignment, for example, as shown in FIG.
A plurality of L-shaped holding jigs 20 are used, and one end of one H-shaped steel 1b of the two H-shaped steels 1a and 1b that joins the short-side tips of the respective holding jigs 20. Is fixed by welding at a position separated by a certain distance from, as shown in FIG.
A bolt 21 attached to the long side of the holding jig 20 pushes a position separated from the joining end of the other H-section steel 1a by a predetermined distance to move the end of the H-section steel 1a to correct misalignment, or As shown in 6 (b), a wedge 22 is driven between the holding jig and the H-shaped steel 1a to correct the misalignment.

[0004]

When the above holding jig 20 is used, a plurality of holding jigs 20 are attached to one H-shaped steel 1b.
Since it is necessary to weld and fix the welding jig to the welding jig, many welding points are required in the welding preparation process, and it takes a lot of time to fix the holding jig 20. Further, there is a disadvantage in that grinder cutting or gas cutting for removing the holding jig 20 is required after welding, and a lot of time is required for post-treatment.

Further, the holding jig 20 is welded to the H
Since the base material of the H-shaped steel 1b is changed in structure because it is fixed to the shaped steel 1b, cracks and the like occur when it is applied to a high-grade material, so that it cannot be applied to a high-grade material.

Further, when the bolt 21 is used to correct the misalignment, spatter is generated in flash welding or semi-automatic welding, because spatter adheres to the thread portion of the bolt.
However, it is not easy to remove them, and it takes a lot of time for post-treatment, and the workability is very poor.

In addition, when a steel material such as an H-shaped steel is pressure-welded by flash welding or the like, there is a risk that the vicinity of the welded portion may be deformed during welding to cause misalignment.

The present invention improves the above disadvantages, corrects the misalignment of the steel materials to be joined and the deformation of the joining ends of the steel materials easily in a short time, and can prevent the misalignment and deformation during welding. The object is to provide an edge restraint jig for steel materials.

[0009]

A steel material end restraint jig according to the present invention has a restraint member and a wedge to be attached near a joint end portion of a steel material to be joined, and the restraint member includes a pair of restraint plates and a restraint plate. It has a pressing member that connects the plates, and the restraint plate has a holding groove that is inserted from the side surface of the steel material to be joined to near the center,
The holding member is characterized in that it is connected to the pair of restraint plates so as to form a wedge driving space between the holding member and the steel member.

An H-section steel end restraint jig according to the present invention is
The H-shaped steel to be joined has a constraining member and a wedge attached near the joint end, the constraining member has a pair of constraining plates and a holding member for connecting the constraining plates, and the constraining plate is of the H-shaped steel to be joined. The holding member has a holding groove formed to be larger than the thickness and length of the flange portion by a certain dimension, and the pressing member is near the groove bottom of the holding groove.
It is characterized in that it is provided at a certain distance from the holding groove and is connected to a pair of restraint plates so as to form a wedge driving space with the flange portion of the H-shaped steel.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The H-section steel end straightening jig of the present invention has a restraint member and a plurality of wedges attached to the joint ends of the H-section steel to be joined. The restraint member includes a pair of restraint plates,
It has three pressing members made of, for example, bar steel or flat steel for connecting the constraining plates. The restraint plate has two holding grooves formed by a certain dimension larger than the thickness and length of the flange portion of the H-shaped steel to be joined, and a fixed distance from the holding groove on the outside and inside near the groove bottom of the holding groove. It has a pressing member at each separated position.

When H-section steel is flash-welded using this end straightening jig, first, the restraining members are inserted from both sides of the flange portions at both ends of the H-section steel set on the frame to join the joint ends. Attach a restraint member at a position that is a certain distance away from. After that, a wedge is driven between each holding member of the restraint member and the flange portion of the H-section steel, the misalignment is corrected, and the H-section steel to be joined is centered. Weld with the flange restrained.

[0013]

EXAMPLE As shown in the front view of FIG. 1 (a) and the side view of FIG. 1 (b), an end straightening jig for H-section steel according to an embodiment of the present invention has a joining end of H-section steel 1 to be joined. It has a restraint member 2 attached to the section and a plurality of wedges. The restraint member 2 has a pair of restraint plates 3a and 3b, and three pressing members 4 made of, for example, a steel bar or a flat steel for connecting the restraint plates 3a and 3b. Restraint plate 3
Two holding grooves 5 into which the flange portion 11 of the H-shaped steel 1 to be joined are inserted are provided in a and 3b. The width and depth of the holding groove 5 are larger than the thickness and length of the flange portion 11 by a certain dimension. It has two holding grooves 5 into which the flange portion 1a is inserted. Each holding member 4 is provided in the vicinity of the groove bottom of the holding groove 5, and the two holding members 4 are attached to the outside of the holding groove 5 with their ends separated from the holding groove 5 by a certain distance. The holding member 4 is mounted inside the one holding groove 5 at an end thereof with a certain distance from the holding groove 5.

When the H-section steel 1 is flash-welded by using the end straightening jig constructed as described above, first, as shown in FIG.
As shown in FIG. 1, the H-shaped steel 1 set on the frame with the holding groove 5 provided with the two holding members 4 of the restraining member 2 facing upwards.
The constraining member 2 is inserted from both sides of the flange portion 11 at both ends of a and 1b, and a constant distance D from the joining end portion, for example, 40 m.
The restraint member 2 is attached at a position separated by m. When attaching the restraint member 2 to the H-section steels 1a and 1b, the restraint member 2
Is attached from both side surfaces of the H-section steels 1a and 1b, it is possible to easily attach and position. Then, in order to correct the misalignment of the H-section steels 1a and 1b, as shown in the front sectional view of FIG. 3, between each holding member 4 of the restraint member 2 and the flange portion 11 of the H-section steels 1a and 1b. Each wedge 6
Type in. The H-shaped steel 1 is produced by driving the wedge 6
The flange plate 11 of a and 1b is pressed to restrain the restraint plate 3 at the maximum.
The H-section steels 1a and 1b can be moved by the difference between the size of the holding groove 5 of a and 3b and the size of the flange portion 11. Therefore, when driving the wedges 6, the driving H-section steels 1a and 1b are considered in consideration of the driving order and the driving strength of the wedges 6.
Is moved up and down to correct the misalignment, the H-section steels 1a and 1b are centered, and the restraint member 2 and each wedge 6 are used to form the H-section steels 1a and 1b.
Restrain the flange portion 11 of 1b. When the flange portion 11 is restrained, the wedge 6 can be driven from both side surfaces of the H-shaped steels 1a and 1b, so that the wedge 6 can be easily driven and the driving force can be adjusted. Also, correct the misalignment for each H-section steel 1a, 1b
Since it can be performed independently, the work of correcting the misalignment can be easily performed.

The H-shaped steels 1a and 1b are composed of the restraint member 2 and the wedge 6.
After centering and restraining the H-shaped steel 1a, 1b
Then, the H-shaped steels 1a and 1b are welded by flash welding using a welding device. Since the joint ends of the H-section steels 1a and 1b are constrained by the restraint member 2 and the wedge 6 during this flash welding, it is possible to prevent misalignment between the joint sections of the H-section steels 1a and 1b during welding. be able to. Therefore, a high-strength welded joint can be stably formed. Further, since the restraint members 2 are provided on both sides of the joint, the restraint plates 3a and 3b can suppress the scattering of spatter that occurs during welding.

When the welding of the H-section steels 1a and 1b is completed and the welding device is removed from the joint, the wedge 6 is removed to release the restraint of the H-section steels 1a and 1b, and the restraint member 2 is removed. In this way, the restraint member 2 can be easily removed from the H-shaped steels 1a and 1b in a short time only by removing the wedge 6.

In the above-mentioned embodiment, the case where the restraining member 2 is provided with the three holding members 4 has been described. However, as shown in the front sectional view of FIG. 4, the holding members 4 are provided outside and inside each holding groove 5. It may be provided. By providing the pressing members 4 on both sides of each holding groove 5 in this manner, the misalignment of the H-section steels 1a and 1b can be corrected and restrained, and by driving the wedges 6, the flange portions of the H-section steels 1a and 1b. The deformation of No. 11 can be corrected, and a good quality welded joint can be stably formed. Further, by providing a pressing member only on the outside of each holding groove 5 and adjusting the driving condition of the wedge 6,
You may make it correct | amend and correct the misalignment of H-section steel 1a, 1b, and may restrain it.

In the above embodiment, the case where the misalignment of the H-section steel 1 is corrected and restrained is explained. However, as shown in the front sectional view of FIG. By providing the pressing member 4 that presses the wedge 6 on the restraining member 2a having the peripheral surface, the misalignment of the steel pipes 7 to be joined can be similarly corrected and restrained during welding. Further, in the welding of other shaped steels and the like, it is possible to correct the misalignment at the time of joining and prevent the misalignment from occurring during welding by using the same end correction jig as described above.

[0019]

As described above, according to the present invention, a restraint member is attached in the vicinity of a joining end portion of a steel material to be joined, and a wedge is driven between a pressing member for connecting a pair of restraint plates of the restraint member and the steel material. Since each steel material is independently moved by a minute distance, it is possible to easily correct the misalignment of the joint portion of the steel material in a short time, and to significantly shorten the welding preparation time.

Further, when joining the H-section steels, a pair of restraint plates connected by a pressing member are provided with holding grooves formed by a certain dimension larger than the thickness and length of the flange section of the H-section steel, The restraint member can be easily attached to the H-section steel by inserting the holding groove into the flange portion of the H-section steel.

Further, when restraining the flange portion of the H-section steel, since the wedge can be driven from the side surface of the H-section steel, the wedge can be easily driven and the driving force can be easily adjusted. It is possible to easily correct misalignment.

Furthermore, when welding a steel material such as H-section steel, the joint end of the H-section steel is constrained by the restraint member and the wedge, so that a misalignment occurs in the joint section of the H-section steel during welding. This can be prevented, and a high-strength welded joint can be stably formed. Further, since the restraint members are provided on both sides of the joint portion, the restraint plate can suppress scattering of spatter that occurs during welding.

Further, since the restraint member can be removed from the steel material only by removing the wedge after welding, the end restraint jig can be removed from the welded steel material in a short time,
Welding work can be performed efficiently in a short time.

Further, by pressing the inner and outer surfaces of the flange portion of the H-section steel with wedges, the deformation of the flange portion of the H-section steel can be corrected and a good quality welded joint can be stably formed. .

[Brief description of drawings]

FIG. 1 is a configuration diagram of a restraint member according to an embodiment of the present invention.

FIG. 2 is a side view showing a state in which a restraint member is attached to H-section steel.

FIG. 3 is a front sectional view showing a state in which an H-shaped steel is restrained.

FIG. 4 is a front sectional view showing a state in which an H-shaped steel is restrained in the second embodiment.

FIG. 5 is a front sectional view showing a state in which a steel pipe is restrained in a third embodiment.

FIG. 6 is a side view showing a configuration of a conventional example.

[Explanation of symbols]

1; H-section steel, 2; Restraint member, 3; Restraint plate, 4; Holding member, 5; Holding groove, 6; Wedge.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hideo Sato             Chiba Prefecture Inzai City 1-5 Otsuka 1 Stock Association             Takenaka Corporation Technical Research Institute (72) Inventor Hideki Furukawa             Chiba Prefecture Inzai City 1-5 Otsuka 1 Stock Association             Takenaka Corporation Technical Research Institute (72) Inventor Toshiaki Tsuchiya             8-21-21 Ginza, Chuo-ku, Tokyo Stock market             Takenaka Corporation Tokyo Main Store (72) Inventor Takashi Matsumaru             8-21-21 Ginza, Chuo-ku, Tokyo Stock market             Takenaka Corporation Tokyo Main Store (72) Inventor Kiyoshi Kanayama             88 Ono-cho, Tsurumi-ku, Yokohama-shi, Kanagawa Japan             Steel Pipe Construction Co., Ltd. (72) Inventor Kazuyoshi Watanabe             88 Ono-cho, Tsurumi-ku, Yokohama-shi, Kanagawa Japan             Steel Pipe Construction Co., Ltd. (72) Inventor Hitoshi Kishida             88 Ono-cho, Tsurumi-ku, Yokohama-shi, Kanagawa Japan             Steel Pipe Construction Co., Ltd. (72) Inventor Mitsuru Fujii             88 Ono-cho, Tsurumi-ku, Yokohama-shi, Kanagawa Japan             Steel Pipe Construction Co., Ltd. (72) Inventor Yahagi Isamu             88 Ono-cho, Tsurumi-ku, Yokohama-shi, Kanagawa Japan             Steel Pipe Construction Co., Ltd.

Claims (2)

[Claims] 1. A restraint member to be attached near a joint end of a steel material to be joined and a wedge, the restraint member having a pair of restraint plates and a holding member connecting the restraint plates, the restraint plate being a steel member to be joined. Has a holding groove that is inserted from the side surface of the
The steel member end restraint jig is characterized in that the pressing member is connected to a pair of restraint plates so as to form a wedge-driving space with the steel member. 2. A H-shaped steel to be joined has a restraint member to be attached near the joining end and a wedge, and the restraint member has a pair of restraint plates and a holding member for connecting the restraint plates, and the restraint plate is joined. The holding member has a holding groove formed to be larger than the thickness and length of the flange portion of the H-shaped steel by a certain dimension. An end restraint jig for a steel material, which is connected to a pair of restraint plates so as to form a wedge driving space with a flange portion of a shaped steel.