JPH066609U - Temporary metal fittings used for pressure welding of existing column bars and pre-assembled column bars - Google Patents

Abstract

(57) [Summary] [Purpose] The joint between the existing column reinforcement and the pre-assembled column reinforcement hung by a crane is fixed on the same axis without shaking. [Structure] A semicircular shape with a shaft 5 as a support shaft on the outer periphery of the central portion of long half pipes 4a and 4b obtained by vertically dividing a steel pipe having a diameter slightly larger than the diameters of the existing column reinforcement 2 and the pre-assembled column reinforcement 3 Clamping piece 6a,
6b can be opened and closed, and the inner wall surfaces of the holding pieces 6a, 6b of the clamp 8 formed so that the holding pieces 6a, 6b can be tightened by the tightening means 7 are fixed by welding or the like. There is.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention, in the pressure welding work in which the pre-assembled column rebars suspended by a crane are pressed onto the existing column rebars using a pressure welder, the joint between the existing column rebars and the pre-assembled column rebars is not shaken and the same axis is maintained. The present invention relates to a temporary fixing metal fitting for temporarily fixing the pressure contactor on a line.

[0002]

[Prior art]

 Conventionally, when pressure-welding a pre-assembled column rebar suspended by a crane to the upper part of an existing column rebar, using a crimping device, there are no temporary fixing brackets for temporarily fixing the existing column rebar and the pre-assembled column rebar on the same axis. Did not exist.

[0003]

[Problems to be solved by the device]

 As described above, in the conventional pressure welding work of the pre-assembled column rebar, there is absolutely no temporary fixing metal fitting for temporarily attaching the joint between the existing post rebar and the pre-assembly column rebar on the same axis. However, since the pre-assembled column reinforcements are hoisted by a crane, it takes a lot of time to sway the pre-assembled column reinforcements and fix them with the existing column reinforcements on the same axis to mount the press-connector at the joint. There was a problem.

The present invention is intended to provide a temporary fastening fitting used for pressure contact between an existing column rebar and a pre-assembled column rebar for the purpose of solving the above conventional problems.

[0005]

[Means for Solving the Problems]

 The present invention makes it possible to open and close a semi-circular clamping piece on the outer periphery of the central part of a long half pipe, which is obtained by vertically dividing a steel pipe having a diameter slightly larger than the diameters of the existing column reinforcement and the pre-assembled column reinforcement. By adopting a means for fixing the inner wall surface of each of the semicircular clamping pieces of a clamp formed by attaching a tightening means to each of the clamping pieces so that the clamping pieces can be closed and closed, The above problems were solved.

[0006]

[Action]

 According to the present invention having the above-mentioned configuration, the joint between the upper end of the existing column rebar and the lower end of the pre-assembled column rebar hung by the crane is fixed on the same axis by the temporary metal fitting without shaking. .

[0007]

【Example】

 An example of the embodiment of the present invention will be described in detail with reference to the drawings. In FIG. 1, a bar arrangement hung by a crane is arranged on the upper end of an existing column bar 2 whose lower part is embedded and fixed in a foundation 1. The state of contacting from the lower end of the assembled front post-column reinforcement 3 is shown. At the joints J between the existing three column rebars 2 and the pre-assembled column rebars 3 shown in FIG. 1, temporary fittings A for temporarily fixing the both without shaking are attached.

The temporary metal fitting A includes a shaft 5 on the outer periphery of the central portion of long half pipes 4a and 4b obtained by vertically dividing a steel pipe having a diameter slightly larger than the diameters of the existing column reinforcement 2 and the pre-assembled column reinforcement 3. The clamping pieces 6a, 6b of the clamp 8 are formed so that the semicircular clamping pieces 6a, 6b can be opened and closed with the supporting shaft as a support shaft, and the clamping pieces 7a, 6b can be clamped by the clamping means 7. Is formed by welding and fixing the inner wall surface of the.

The tightening means 7 does not need to be particularly limited, but preferably the base of the tightening bolt 10 is rotated about the axis of the projecting pieces 9a, 9b projecting from the tip of the one sandwiching piece 6a. Two projecting pieces 11a and 11b are provided so as to project from the tip of the other clamping piece 6b with the width of the tightening bolt 10, and the tightening bolt 10 is provided between the projecting pieces 11a and 11b. While inserting the tip of the fixing nut 12, the fixing nut 12 is screwed into the tightening bolt 10, and the fixing nut 12 is pressed against the projecting pieces 11a and 11b so that the clamping pieces 6a and 6b can be closed. Is recommended.

The lengths of the long semi-tubes 4a and 4b are not particularly limited, but are preferably sufficiently at least up and down around the joint J between the existing column reinforcement 2 and the pre-assembled column reinforcement 3. It is recommended to have a length of at least 20 to 30 cm so that it can be covered with room.

Next, the operation of the embodiment of the present invention will be described. The upper end of a plurality of existing column rebars 2 protruding above the foundation 1 is in contact with the lower end of a pre-assembled column rebar 3 suspended in a cage and suspended by a crane, and at least about half the number of existing columns A temporary fixing metal fitting A is fitted and fixed to a joint portion J between the column reinforcement 2 and the front assembly column reinforcement 3. In this fitting and fixing method, the holding pieces 6a and 6b of the clamp 8 are rotated inward so as to cover the joint J, and the tightening bolt 10 is fitted between the protruding pieces 11a and 11b. A fixing nut 12 is tightened to the tightening bolt 10, and the sandwiching pieces 6a and 6b are pressed against the outer peripheral surfaces of the existing column reinforcing bar 2 and the pre-assembled column reinforcing bar 3 near the joint J. As a result, each pre-assembled column bar 3 is fixed on the same axis line without shaking on each corresponding existing column bar 2.

Then, first, a pressure contactor (not shown) is attached to the joint J to which the temporary fastening metal A is not fixed, and heating is performed to perform pressure welding. After the pressure welding is completed, the pressure welding device is attached to the existing column reinforcement 2 and the pre-assembled column reinforcement 3 to which the temporary fastening metal A is attached, and then the fixing nut 12 is loosened to remove the temporary fastening metal A, and the joint J Is heated and pressure welding is performed. In the same manner, the joint J of the portion where the temporary metal fitting A is attached is pressure welded.

[0013]

[Effect of device]

 Since the present invention is as described above, the clamping pieces of the temporary metal fittings are press-fitted and fixed to the upper end of the existing column rebar so that the joint between the existing column rebar and the pre-assembled column rebar is covered. Since the lower end of the pre-assembled column bar that is hoisted by the crane is fixed on the same axis without shaking, the pressure contactor can be easily and quickly installed.

[Brief description of drawings]

FIG. 1 is a front view showing a state in which a temporary fixing metal fitting of the present invention is attached to a joint portion between an existing column rebar and a pre-assembled column rebar.

FIG. 2 is an enlarged front view of an essential part showing a state in which a temporary fixing metal fitting of the present invention is attached to a joint portion between an existing column reinforcing bar and a pre-assembled column reinforcing bar.

FIG. 3 is an enlarged perspective view showing an open state of a temporary fixing metal fitting used at the time of pressure contact between an existing column bar and a pre-assembled column bar of the present invention.

[Explanation of symbols]

2 existing column rebars, 3 pre-assembled column rebars, 4a, 4b long half pipes, 6a, 6b clamping pieces, 7 tightening means, 8
Clamp, A Temporary fitting, J joint.

Claims (1)

[Scope of utility model registration request] 1. A semi-circular holding piece is openable and closable on the outer periphery of the central portion of a long half pipe obtained by vertically dividing a steel pipe having a diameter slightly larger than the diameters of the existing column rebar and the pre-assembled column rebar. An existing column bar and a pre-assembled member formed by fixing the inner wall surface of each of the semicircular clamping pieces of a clamp formed by attaching a tightening means to each of the clamping pieces so that the clamping pieces can be closed and closed. Temporary fixing metal fittings used for pressure welding of column bars.