JP3222805U - Joining bolt - Google Patents

Abstract

The present invention provides a joining bolt capable of simplifying the work of welding a joining bolt to a stud or a trunk edge of a secondary member. A joining bolt 1 is inserted into a mounting hole P1 of a member P and welded to the mounting hole in a state in which a screw portion 2 protrudes on the front side of the member, and a fitting ring 3 that matches the mounting hole is provided. It is formed on the cylindrical part of the joining bolt. When the fitting ring is fitted into the mounting hole, the shaft core of the threaded portion is fixed in alignment with the core of the mounting hole, so that welding is facilitated. [Selection] Figure 2

Description

  The present invention relates to a steel-structured joint bolt, and more particularly to a joint bolt configured to be welded in advance to a stud or a trunk edge used for a secondary member.

  In the steel structure, pin joints are used for joint portions of secondary members such as studs, trunk edges, and small beams. And in the square steel pipe used for this secondary member, a C-shaped channel, etc., the bolt for joining may be welded beforehand at a factory.

  Conventionally, a special joining bolt as described in Patent Document 1 has also been proposed. However, at present, a mounting hole is formed in a plate surface of a square steel pipe or a C-shaped channel, and the joining bolt is formed in this mounting hole. The work of welding is done. That is, this is a processing operation for inserting the joining bolt from the inside to the outside of the mounting hole and welding the cylindrical portion of the joining bolt to the mounting hole.

Japanese Utility Model Publication No. 4-37704

  In the machining operation of welding the joining bolt to the mounting hole of the square steel pipe or the C-shaped channel, an operation is performed in which a mounting hole slightly larger than the bolt diameter is opened and the joining bolt is inserted into the center of the mounting hole. .

  However, since the diameter of the attachment hole is slightly larger than the diameter of the joining bolt, when welding the joining bolt, the joining bolt moves in the attachment hole, and the shaft core of the joining bolt moves to the attachment hole. There was a risk of slipping off the core.

  Therefore, conventionally, in order to prevent the joining bolt from shifting, an operator devised a jig or the like to temporarily fix the joining bolt, and while maintaining this state, the cylindrical portion of the joining bolt is attached to the mounting hole. It is a work to weld to. Accordingly, the work of welding the joining bolt to a square steel pipe or C-shaped channel used as a secondary member has been an extremely troublesome work.

  Therefore, the present invention has been devised to solve the above-described problems, and can be used to simplify the work of welding a bolt to a square steel pipe or C-shaped channel used as a secondary member. The purpose is to provide bolts.

  In order to achieve the above-mentioned object, the first means of the present invention is a state in which the screw part 2 protrudes from the front side of the member P inserted into the mounting hole P1 opened in the plate surface of the steel structure member P. When the fitting ring 3 to be welded to the attachment hole P1 is formed in the cylindrical portion and the fitting ring 3 is fitted into the attachment hole P1, the thread portion The second axial core portion is configured to coincide with the core of the mounting hole P1.

  The member P of the second means is a square steel pipe or C-shaped channel as a secondary member for steel structure.

  The fitting ring 3 of the third means is formed so that the length of the fitting ring 3 is longer than the plate thickness of the member P in which the attachment hole P1 is opened, and in the direction of the screw portion 2. A tapered taper 3A is formed on the screw portion 2 side.

  As described in claim 1 of the present invention, when the outer fitting ring 3 is fitted into the mounting hole, the shaft core of the screw portion 2 is aligned with the core of the mounting hole P1, so that the bolt shaft is displaced. No jigs or the like for temporarily fixing such that there is no need, and the work of welding the joining bolt 1 to the plate surface of the steel structure member P is greatly simplified.

  As in claim 2, the member P is a square steel pipe or a C-shaped channel as a secondary member for a steel structure, and in particular, a joining bolt suitable for an operation of welding to a secondary member for a steel structure. Can be provided.

  According to the fitting ring 3 of claim 3, the length of the fitting ring 3 is formed so as to be longer than the plate thickness of the member P in which the attachment hole P <b> 1 is opened, and is narrowed in the direction of the screw part 2. By forming the taper 3 </ b> A on the screw portion 2 side, it is possible to match not only the mounting hole P <b> 1 of the member P but also the core of the mounting hole Q <b> 1 of another connecting member Q that overlaps the member P.

It is a perspective view which shows one example of use of this invention. It is a perspective view which shows the other usage example of this invention. It is a front view which shows one Example of this invention. It is a front view which shows the other Example of this invention.

  The present invention will be described based on the illustrated example. The joining bolt 1 of the present invention is a joining bolt 1 which is inserted into a mounting hole P1 opened in the plate surface of the steel structure member P and welded. That is, welding is performed in a state where the thread portion 2 of the joining bolt 1 protrudes to the front side of the member P. This member P is mainly a square steel pipe (see FIG. 1) or a C-shaped channel (see FIG. 2) used as a secondary member for a steel structure such as a stud or a trunk edge, but is welded to another member P. Is also possible.

  The joining bolt 1 is formed with a fitting ring 3 in the cylindrical portion of the bolt (see FIGS. 3 and 4). The fitting ring 3 is a portion that bulges to match the diameter of the mounting hole P1, and when the fitting ring 3 is fitted into the mounting hole P1, the shaft core of the screw portion 2 of the joining bolt 1 is attached. It is configured to match the core of the hole P1.

  That is, the diameter of the threaded portion 2 of the joining bolt 1 is smaller than the diameter of the mounting hole P1, but the outer diameter of the fitting ring 3 is set to coincide with the inner diameter of the mounting hole P1. Therefore, when the welding bolt 1 is inserted into the mounting hole P1, the fitting ring 3 is fitted into the mounting hole P1, and the threaded portion 2 is projected on the front side of the member P, welding is performed. The screw core 2 is welded in a state where the shaft core coincides with the core of the mounting hole P1 (see FIG. 2).

  The length of the fitting ring 3 of the joining bolt 1 shown in FIG. 3 is formed to be longer than the plate thickness of the member P in which the attachment hole P1 is opened. Further, a taper 3A that narrows in the direction of the screw portion 2 is formed on the screw portion 2 side. Then, even when the attachment hole Q1 of the connecting member Q is aligned with the attachment hole P1 of the member P, it can be fitted with the long fitting ring 3 (see FIG. 1). The illustrated welded portion 5 shows spot welding. The welding position can be arbitrarily changed.

  On the other hand, the fitting ring 3 of the joining bolt 1 shown in FIG. 4 is formed to have a length equivalent to the thickness of the portion of the mounting hole P1 or slightly shorter than the thickness. Also in this fitting ring 3, the core of the mounting hole P1 and the shaft core of the joining bolt 1 coincide with each other only by fitting into the mounting hole P1. As described above, the shape, length, diameter, and the like of the fitting ring 3 can be appropriately changed by the member P, the other connecting member Q, and the like.

  The fastening bolt 1 fixed to the member P can obtain a stronger tightening force by fastening a hex nut with a disc spring (not shown) in which a disc spring washer is integrated and integrated with the hex nut. Moreover, the nut screwed to this joining bolt 1 can be changed arbitrarily.

  In addition, this invention is not limited to the example of illustration, It can change arbitrarily in the range which does not change the summary of this invention.

P member P1 mounting hole Q connecting member Q1 mounting hole 1 joining bolt 2 screw part 3 fitting ring 3A taper 4 head 5 welded part

Claims (3)

  A joining bolt that is inserted into a mounting hole opened in the plate surface of a steel structure member and is welded to the mounting hole in a state in which a thread portion protrudes from the front side of the member, and is fitted into the mounting hole. A joining bolt, wherein a fitting ring is formed in a cylindrical portion, and when the outer fitting ring is fitted into a mounting hole, the shaft core portion of the screw portion is aligned with the core of the mounting hole.   The joining bolt according to claim 1, wherein the member is a square steel pipe or a C-shaped channel that is a secondary member for a steel structure.   The fitting ring is formed so that the length of the fitting ring is longer than the plate thickness of the member in which the mounting hole is opened, and a taper narrowing in the screw portion direction is formed on the screw portion side. The joining bolt according to claim 1 or 2.

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