JP3022319U - Spacer for holding pillar rebar in thin PC formwork method - Google Patents

Abstract

(57) [Abstract] [Problem] There is nothing for restraining the upper end of the built-in column main bar, and when the beam rebar cage is built, it swings, and the positioning work is troublesome. SOLUTION: A total of four column main bars 3 vertically project inside the column PC form 1 at the center position of each side, and each column main bar 3 is attached to the column PC form 1 by a column reinforcing bar spacer 10. The work is performed by pressing it against the center of the inner wall surface of the car. Spacer 1
0 is formed by arranging a plurality of rebars 12 vertically and horizontally and joining the intersections by welding to form a lattice shape. Both ends of each rebar 12 are bent in a crank shape, and both bent ends 12a are The beam PC form 1 is fitted and held on the upper opening edge.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a spacer for holding a column reinforcing bar in a thin PC formwork method.

[0002]

[Prior art]

 The method of constructing a structure using a thin-walled PC formwork is to assemble a thin-walled PC formwork in the shape of a material such as a pillar, a beam, or a floor slab in advance into the structure shape, and then rebar reinforcement and Is a method in which a structure conforming to the external appearance of the assembled shape of the thin-walled PC form is obtained by making the structure integrated with the thin-walled PC form by casting. Therefore, with this construction method, the thin-walled PC formwork functions as it is as a discard formwork, eliminating the need to remove the formwork and supporting structures as in the conventional method, which reduces the construction man-hours and shortens the construction period. However, there is an advantage that the appearance and construction accuracy are improved according to the finish of the formwork.

In addition, since the hoop reinforcement is built into the PC formwork in advance, the reinforcing bar to be laid in the column PC formwork is only the column main reinforcement that is built in the vertical direction. Also has the advantage that it can be simplified.

FIG. 3 shows the assembling work. In the figure, 1 is a pillar PC form, and 2 is a beam PC form installed on the upper part of the pillar PC form 1 in a cross shape. Inside the pillar PC form 1, a total of four pillar main rebars 3 are vertically projected at approximately the center of each side, and a beam rebar preliminarily assembled into a cross shape through the four pillar main rebars 3. A cage 4 is built in the beam PC form 2.

[0005]

[Problems to be solved by the device]

 In the above configuration, there is currently no one that restrains the upper end of the built-in column main bar 3, and when the beam rebar cage 4 is built, it swings as shown by the arrow in the figure, and the positioning work is troublesome. In addition, there was a problem that it was easy to penetrate the wrong position and the building operation had to be redone each time.

The present invention has been made to solve the above problems, and the column rebar in the thin-walled PC formwork method in which the upper end of the column main bar is restrained by a simple jig to improve the workability of building the beam rebar cage. It is intended to provide a retaining spacer.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the invention according to claim 1 is to form a pillar PC by combining a plurality of reinforcing bars vertically and horizontally to form a lattice shape, and bending the ends of each reinforcing bar into a crank shape. The main bar is held in a predetermined position by being fitted and held in the opening edge of the mold, and by passing through the main bar longitudinally passing through the column PC mold by intersecting the eyes of the lattice. By doing so, we aimed to improve the positioning and installation work of the beam reinforcement cage.

[0008]

[Embodiment of device]

 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in the figure, the same reference numerals are omitted for the same portions as the conventional one, and only newly added portions will be described by using the new symbols.

In FIGS. 1 and 2, a total of four pillar main bars 3 vertically project inside the pillar PC form 1 at the center position of each side, and penetrate through the four pillar main bars 3. As shown in FIG. 3 described above, the beam rebar cage 4 assembled in a cross shape in advance is built in the beam PC form 2.

At the previous stage, the work of restraining each pillar main bar 3 by pressing it to the center of the inner wall surface of the pillar PC form 1 by the pillar rebar holding spacer 10 according to the present invention is performed.

As shown in FIG. 1, the spacer 10 is formed by arranging a plurality of reinforcing bars 12 vertically and horizontally, and joining the intersecting portions by welding to form a lattice, and both ends of each reinforcing bar 12 are cranked. The bent ends 12a are fitted and held at the upper opening edge of the beam PC form 1.

In each of the reinforcing bars, the distance between the two reinforcing bars 12 intersecting each other at the center is equal to the diameter of the column main bars 3, and the reinforcing bars 12 intersecting the four corners connect the column main bars 3 to the column PC formwork 1. It has the function of being pressed and restrained against the inner wall surface of the.

This spacer 10 is attached by installing the crank-shaped bent end 12 a on the upper edge of the column PC form 1 with the column main bar 3 sandwiched between the two rebars 12 at the center. As shown in FIG. 2, the spacer 10 is positioned and supported at a position lower than the opening edge of the pillar PC formwork 1 by the pitch of the crank, and at the same time, the pillar main bar 3 is positioned at the center of each side of the pillar PC formwork 1. Position and constrain the position.

Therefore, after this mounting work, the upper end of the column main bar 3 is fixed in a positioned state, and the work at the time of erection of the subsequent reinforcing bar cage 4 as shown in FIG. 3 can be easily performed. Further, the spacers 10 are integrally buried by pouring concrete and used as a part of the reinforcing bars.

In the above-described embodiment, the case where the column main bar 3 is four has been described, but in the case of more than four columns, if it is formed in a lattice shape by a combination of the reinforcing bars corresponding to that. good.

[0016]

[Effect of device]

 As described above in the embodiments, in the invention according to claim 1 of the present invention, the main reinforcement longitudinally passing through the pillar PC formwork is held at a predetermined position to position the beam rebar cage. Also, the building work can be improved. In addition, the structure is simple and inexpensive to implement, and it has the advantage of being used as part of the reinforcing bar after being buried in concrete.

[Brief description of drawings]

FIG. 1 is a perspective view showing a positional relationship between a spacer and a column main bar according to the present invention.

FIG. 2 is a plan view showing a state in which the spacer is incorporated in a pillar PC form.

FIG. 3 is an explanatory view of a thin-walled PC formwork method to which the spacer of the present invention is applied.

[Explanation of symbols]

 1 pillar PC formwork 2 beam PC formwork 3 pillar main bar 10 spacer 12 rebar 12a crank upper bent end

Front page continuation (72) Inventor Mitsuyuki Yasuhara, 35, Nishimachi, Chuo-ku, Kobe, Hyogo Prefecture Obayashi Corp., Kobe Branch (72) Inventor, Shigekazu Sakurai 35, Nishimachi, Chuo-ku, Kobe, Hyogo Prefecture, Kobe Branch, Obayashi ( 72) Creator Go Watanabe 35 Nishimachi, Chuo-ku, Kobe, Hyogo Prefecture Obayashi Corporation Kobe Branch (72) Creator Kei Sakamoto 35, Nishimachi, Chuo-ku, Kobe City Obayashi Corporation Kobe Branch (72) Creator Tetsuro Ito 35 Nishimachi, Chuo-ku, Kobe-shi, Hyogo Within Obayashi Corp. Kobe Branch (72) Inventor Kei Saito 35 Nishimachi, Chuo-ku, Kobe-shi Obayashi Within Kobe Branch

Claims (1)

[Scope of utility model registration request] 1. A plurality of rebars are vertically and horizontally combined to form a lattice, and the ends of the rebars are bent in a crank shape so as to be fitted and held in an opening edge of a column PC formwork, and the column is formed. A column rebar holding spacer in a thin-walled PC form construction method, characterized in that the main bar is held in a predetermined position by penetrating a main bar longitudinally passing through the PC form frame so as to intersect the eyes of the lattice.