JPS58968B2 - Manufacturing method for precast concrete panels - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing precast concrete panels using a vertical casting method.

Vertical pouring method when placing concrete panels.

Although it has long been known that the formula is superior, it has not achieved sufficient results in our country.

That is, although the vertical driving method is supposed to require fewer man-hours for driving than the conventional flat driving method, in our country this actually increases the man-hours, making it difficult to put it into practical use.

The reason for this is that concrete panels in Japan have a more complicated reinforcement arrangement than those in other countries due to earthquake resistance, and various members are attached to connect the panels together, making it difficult to form vertical structures that are adjacent to each other. In order to install these in the vertical space between the board frames, conventionally the reinforcing bars had to be assembled by climbing up and down using ladders or stepladders within this narrow vertical space, which was extremely time-consuming. At the point.

The present invention has been proposed for the purpose of eliminating such defects and efficiently manufacturing precast concrete panels by vertical casting method. It is pulled out from the frame and installed horizontally, then the reinforcing bars and attached members are assembled and fixed on the horizontal temporary frame, and then the same temporary frame is inserted into the frame again and concrete is placed between the adjacent temporary frames. The present invention relates to a method for manufacturing a precast concrete panel, which is characterized by being cast.

In the present invention, as described above, a vertical plate frame is mounted on a pedestal so that it can be inserted into and removed from the pedestal, the temporary frame is once removed from the pedestal, and then installed horizontally, and in this position, the required reinforcing bars are placed on the temporary frame. , fittings such as connecting hardware between panels, wiring components, etc. are assembled and fixed on the temporary frame, and then the vertical plate frame with the reinforcing bars and attached members attached is placed on the mount again as described above. The temporary frames are assembled on a pedestal with the required spacing between them, concrete is placed on the adjacent pedestals, and the precast concrete panels are then removed from the mold and cured in the same manner as in the conventional method to produce a precast concrete panel. It is something.

Therefore, according to the method of the present invention, in a vertical casting method for manufacturing precast concrete panels, reinforcing bars and auxiliary members are assembled in a vertical space between adjacent vertical plate frames mounted on a frame, and then assembled into a temporary frame. The reinforcing bars and auxiliary members are assembled on the vertical temporary structure that has been pulled out from the pedestal and placed horizontally without attaching the reinforcing bars and auxiliary members to the same temporary frame. Since the temporary frame that has been assembled and installed is inserted into the frame again and installed, the work of assembling reinforcing bars and auxiliary members and attaching them to the temporary frame is greatly simplified, and can be done easily and accurately. Therefore, highly accurate precast concrete panels can be mass-produced efficiently using the vertical casting method.

The present invention will be described below with reference to the illustrated embodiments.

A is a vertical plate frame, with protruding parts 2 protruding from both sides of the upper end of the vertical main plate 1, a hook 3 for hanging is provided on the turning part 2, and a pie break 4 is provided on the main plate 1. It is installed.

Each of the vertical plate frames A is inserted into a pair of mounts B, B, and the left and right protrusions 2, 2 are slidably locked to each of the mounts B,
In this way, the temporary frame A is mounted on the frames B and H so that it can be inserted into and removed from it.

(See FIG. 1) In the present invention, the temporary frame A is lifted from the frames B, B using the hanging hooks 3, 3, taken out, and placed horizontally as shown in FIG.

Next, on the temporary frame A, a peripheral frame 5, an opening frame 6, reinforcing bars 7,
Other components such as connecting fittings for interconnecting panels, embedded wood, wiring components, etc. are assembled and fixed onto the temporary frame A.

(See Figure 3) Figures 7 to 10 show the attachment part of the reinforcing bar 7 to the temporary frame A. A bolt 9 inserted through the peripheral frame 5 fixed to the temporary frame A is screwed, and in FIG. The ends of the reinforcing bars 7 are welded.

In addition, as shown in FIG. 9, the intermediate part of the reinforcing bar 7 is tied with a fastening wire 13 buried in a concrete block spacer 12 glued to the temporary frame A, or as shown in FIG. It is resiliently engaged with a plastic potting attachment 14 which is glued to.

Next, as described above, the temporary frame A with the reinforcing bars 7 and other attached parts assembled and fixed thereon is hung vertically using the hanging hooks 3.3 (see Fig. 4), as shown in Fig. 5. It is again inserted between the pair of mounts B, B, and the protrusions 2, 2 on both sides are locked to each mount B, thereby mounting the vertical plate frame A on each mount B.

In this way, the vertical plate frame A with the reinforcing bars 7 and attached members attached thereto is successively inserted between the frames B and B as described above.
, B, the respective temporary frames A are assembled so that a predetermined interval is formed between adjacent temporary frames A (see Fig. 6), and the gaps between each adjacent temporary frame A are Precast concrete panels are manufactured by pouring concrete into the concrete, curing it and curing it in a removable mold.

Note that illustration of a hydraulic machine and other accessories for assembling the temporary frame A is omitted in the drawing.

Although the present invention has been described above with reference to embodiments, the present invention is of course not limited to such embodiments, and various modifications to the design may be made without departing from the spirit of the present invention. .

[Brief explanation of the drawing]

FIGS. 1 to 6 are slope views showing steps of an embodiment of the method for manufacturing a precast concrete panel according to the present invention;
7 to 10 are side views showing the attachment portion of the reinforcing bar to the vertical plate frame. A... Vertical board frame, B... Frame, 1... Vertical main plate, 2...
Projection, 3...Hook for hanging, 7...Reinforcing bar.

Claims (1)

[Claims] 1. The vertical plate frame that is removably mounted on the frame is pulled out from the frame and installed horizontally, then the reinforcing bars and attached members are assembled and fixed on the temporary frame in the horizontal state, and then the same temporary frame is placed again on the above-mentioned frame. A method for producing a precast concrete panel, which comprises inserting concrete into a frame and pouring concrete between the adjacent temporary frames.