JPH0967898A - Thin beam pc form - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily form a thin beam PC form, by erecting the right and left side plates of the bottom plate part to form a U-shape rising from the fold line and adjusting and fixing them through a separator and a sleeve nut while rotating a bolt inserted from the outside. SOLUTION: A flat precast concrete board integrally connected to side plates 3, 3 through V-shaped folds 2 longitudinally formed at both sides of a bottom plate 1 is erected at site from the folds lines 2 as the base point thereof. One end of a separator body 12 forming a shorter rod than the inner width of beam is fixed to one of side plates 3 with resin concrete or the like and one end of a sleeve nut 14 is screwed in the other end and the other end of the sleeve nut 14 is adjusted to be oppositely arranged in the inside of the other side plate 3. A bolt 16 is inserted in the bolt hole from the outside of the other side plate 3 and screwed in the sleeve nut 14 and further, both side plates 3, 3 are fixed in the erected state to form a thin beam PC form.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin-walled PC mold formed by raising both sides of a flat plate PC plate along folds.

[0002]

2. Description of the Related Art A method of constructing a structure using a thin-walled PC formwork is to assemble a thin-walled PC formwork, which is previously formed in a member shape such as a pillar, a beam, or a floor slab, into a structure shape, and then install a reinforcing bar. A structure that conforms to the appearance of the assembled shape of the thin-walled PC form can be obtained by forming the thin-walled PC formwork by integrating the thin-lined PC form by striking and placing concrete. Therefore, this construction method eliminates the need for installation and removal of formwork and support,
It has the advantage of reducing the number of construction steps and shortening the construction period.

Among these, the thin-walled beam PC form is, due to the thinness of its members, a flat plate-shaped precast concrete slab having a pair of folds, which is raised from the folds as a base point, thereby The one in which both side plate parts that form a U shape and stand up on both sides of the bottom plate part has been developed and transported,
We are trying to save space when stocked.

FIG. 3 shows a thin-walled beam PC form having such a structure. In this product, side plate portions 3 are integrally connected to both sides of the bottom plate portion 1 along the longitudinal direction via v-shaped fold portions 2 and, as shown by an arrow at the construction site, fold line 2 is formed.
By raising the left and right side plate portions 3 with the hinge as the base point, a thin-walled beam PC form having a U-shaped cross section is formed.

In this case, a plurality of separators 4 are arranged between the side plate portions 3 at predetermined intervals in order to raise and hold the side plate portions 3 in a U-shape.

The separator 4 is provided to hold the both side plate portions 3 in a standing state and to counter the lateral pressure of the concrete placed therein, and one end of each of the two side plate portions 3 is attached to the side plate portion 3. It is composed of a pair of rod-shaped main bodies 4a fixed via resin concrete and the like, and an adjustment turnbuckle 4b in the center which connects the other ends of the main bodies 4a.

[0007]

The height of the above-mentioned beam PC formwork is 800 mm, the width is 600 mm, the member thickness is 25 mm, and the placement height of the separator 4 is 45 mm from the inner bottom surface of the bottom plate portion 1. Limited to height position. This is set to this height position as an upper limit in order to avoid a hindrance to the reinforcing work of the reinforcing bar to be arranged inside later.

Therefore, in the adjustment work of the turnbuckle 4b, the worker must lean out and engage the tightening tool with the outer circumference of the turnbuckle 4b to rotate it.
Since the height position from the bottom plate is low, the tool immediately hits the bottom with each turn, so the adjustment amount for each operation is small, and each time the tool is removed, it is necessary to turn again. Since it is necessary to find a suitable angle and rotate it while engaging it, there is a problem that work efficiency is poor and workability is poor because the worker is forced to take an unreasonable posture.

The present invention solves the above problems, and provides a thin-walled beam PC form which enables simple and efficient adjustment work of the separator in the thin-walled beam PC form of this type of structure. Is intended.

[0010]

In order to achieve the above object, the invention according to claim 1 of the present invention is to start up a flat plate-shaped precast concrete slab having a pair of folds with the folds as a base point. Thus, the bottom plate part and the both side plate parts which are formed in a U shape and stand up on both sides of the bottom plate part are integrally formed, and the separator is interposed between the both side plate parts to hold the thin-walled beam PC. In the mold, the length of the main body of the separator is formed to be shorter than the normal width of the beam, and one end of the separator is fixed to the one side plate portion, and the other end is attached with a sleeve nut. By fixing the bolt penetrating this through the sleeve nut by screwing, the adjustment and fixing work can be performed by the turning operation of the bolt from the outside.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. 1 and 2 show a thin-walled beam PC form according to the present invention. In the drawings, the same parts as those in the conventional technique are designated by the same reference numerals, and only different parts are denoted by different reference numerals.

In the thin-walled beam PC form shown in the figure, side plates 3 are integrally formed on both sides of the bottom plate 1 along the lengthwise direction through v-shaped folds 2 in the same manner as in the conventional case. At the construction site, the left and right side plate portions 3 are raised using the fold 2 as a hinge base point to form a thin-walled PC mold having a U-shaped cross section.

A plurality of separators 10 according to the present invention are arranged at predetermined intervals between the side plate portions 3 in order to raise and hold the side plate portions 3 in a U-shape.

The separator 10 has a length shorter than the normal width of the beam, and one end of which is fixed to the one side plate portion 3 with resin concrete or the like. A sleeve nut 14 having one end screwed and fixed to the end side and the other end being in contact with the inside of the other side plate portion 3, and a bolt formed from the outside of the other side plate portion 3 through the inside and outside thereof. The bolt 16 is screwed into the sleeve nut 14 through the through hole 3a.

Therefore, in the adjustment and fixing work of the side plate portion 3 at the time of start-up, first, the sleeve nut 14 is screwed in and adjusted, and the side plate portion 3 stands up vertically, and then the inner wall surface of the other side plate portion 3 is hit. After that, the sleeve nut 14 is pressed and fixed with a spanner or the like in a state where the sleeve nut 14 is aligned with the bolt through hole 3a, and then the bolt 16 is screwed into the sleeve nut 14 from the outside to fasten them together. The plate portion 3 is fixed in the upright state.

At this time, since the sleeve nut 14 remains fixed and only the bolt 16 needs to be turned from the outside, compared with the conventional adjustment work using the turnbuckle,
Adjustment and fixing work can be performed without being restricted by the rotation angle. Further, since the worker does not have to lean out to fix the sleeve nut 14, it is possible to perform the work in a comfortable posture.

[0017]

As described above in detail with reference to the embodiments, in the thin-walled beam PC form according to the present invention, the start-up adjustment and fixing work of both side plates can be performed by the turning operation of the bolt from the outside. Since it can be performed, the work is easier than the conventional adjustment work using a turnbuckle, the adjustment amount for each operation can be large, the work efficiency can be greatly improved, and the adjustment can be performed in a comfortable posture. There are various advantages such as being possible.

[Brief description of drawings]

FIG. 1 is a perspective view showing an assembled state of a thin beam PC mold according to the present invention.

FIG. 2 is a sectional view showing a completed state of the assembly.

FIG. 3 is a perspective view showing an assembled state of a conventional thin-walled beam PC form.

[Explanation of symbols]

 1 Bottom plate part 2 Fold 3 Side plate part 10 Separator 12 Main body 14 Sleeve nut 16 Bolt

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Mitsuyuki Yasuhara 35 Nishimachi, Chuo-ku, Kobe City, Hyogo Prefecture Obayashi Corporation Kobe Branch (72) Inventor Shigekazu Sakurai 35 Nishimachi, Chuo-ku, Kobe City, Hyogo Prefecture Obayashi Kobe Corporation In branch (72) Inventor Go Watanabe 35 Nishimachi, Chuo-ku, Kobe-shi, Hyogo Obayashi Corp. Kobe Branch (72) Inventor Kei Sakamoto 35 Nishimachi, Chuo-ku, Kobe-shi, Hyogo Obayashi Corp. Kobe Branch (72) Invention Tetsuro Ito 35 Nishimachi, Chuo-ku, Kobe-shi, Hyogo Obayashi Corporation Kobe Branch (72) Inventor Hiroshi Yamashita 35 Nishimachi, Chuo-ku, Kobe City Hyogo Prefecture Obayashi Corporation Kobe Branch

Claims (1)

[Claims] 1. A flat plate-shaped precast concrete slab having a pair of folds is erected from the folds as a base point to thereby form a bottom plate portion and both side plate portions that rise in a U shape on both sides of the bottom plate portion. In a thin beam PC form which is integrally formed and is held in a standing state with a separator interposed between the both side plate parts, the main body length of the separator is formed to be shorter than the beam inner width, and one end thereof is formed. While fixing to the one side plate portion,
A thin-walled beam PC form characterized in that a sleeve nut is attached to the other end, and a bolt penetrating from the outside of the other side plate portion is screwed into and fixed to the sleeve nut.