JPH0540962Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a formwork apparatus for manufacturing L-shaped precast concrete members.

(Prior art) Conventionally, when manufacturing an L-shaped precast concrete member, a vertical formwork a is prepared as shown in Fig. 3, and concrete b is poured into the formwork a from above all at once. , after pouring concrete for one side of the L-shaped precast concrete member and developing a predetermined strength, the mold is once removed and the thus obtained member c (see Fig. 4) is poured horizontally. The concrete pouring form d of the other side of the L-shaped precast concrete member was reassembled so as to be connected (see Fig. 5), and concrete was poured into the same form d.

(Problem to be solved by the invention) In the former case, a formwork is required over the entire surface of the member, making it difficult to place concrete concrete, and it takes time to assemble and dismantle the formwork.

In the latter case, the work is divided into two steps, which takes time and also makes it difficult to treat the joint.

The present invention was proposed in view of the problems of the prior art, and its purpose is to provide an L-shaped preform that is easy to manufacture, is densely filled with concrete, and has improved quality. An object of the present invention is to provide a formwork apparatus for manufacturing cast concrete members.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the formwork device for manufacturing L-shaped precast concrete members according to the present invention is provided with
It is constructed by rotatably supporting the lower surface of one side piece of the formwork.

(Function) Since the present invention is constructed as described above,
The L-shaped formwork is rotated around the pivot point between the end surface of the horizontal frame installed on the base and the lower surface of the one-side formwork part of the L-shaped formwork, and the one-side formwork part is rotated. Place the piece on the horizontal frame, pour concrete for one side piece of the L-shaped precast concrete member on the same side formwork piece, and after the poured concrete has hardened to a certain extent, the pivot part is placed. Rotate the L-shaped formwork 90 degrees around the center, place the other side of the L-shaped formwork horizontally on the base, and place other L-shaped precast concrete members on the other side of the formwork piece. By pouring the concrete of the side pieces, an L-shaped precast concrete member is produced.

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

1 is a horizontal steel frame installed on the base 2,
A bracket 3 protrudes from the tip of the frame 1.
A bracket 5 protruding from the lower surface of one frame piece 4a of the L-shaped frame 4 is rotatably supported via a pin 6.

Since the illustrated embodiment is configured as described above, the L-shaped formwork 4 is rotated about the pin 6, and the one side formwork piece 4a of the L-shaped formwork 4 is moved to the horizontal frame 4. One side piece 7a of the L-shaped precast concrete member 7 is mounted on the same side formwork piece 4a.
pour concrete. (See Figure 1) After the poured concrete has hardened to some extent,
Rotate the L-shaped formwork 4 by 90° in the direction of the arrow in FIG. Concrete for the other side piece 7b of the L-shaped precast concrete member 7 is placed on the side formwork piece 4b, and the concrete for the both side pieces 7a and 7b is integrated.
A molded precast concrete member 7 is manufactured.

In the illustrated embodiment, it is formed on a stepped portion of the base 2, and the other side formwork piece 4b is placed horizontally on the lower step. By doing so, the other side formwork piece 4b can be attached to the base 2 without forming the base 2 into a stepped part.
It can be placed horizontally on top.

(Effects of the invention) As described above, the formwork apparatus for manufacturing L-shaped precast concrete members according to the invention has one side formwork of the L-shaped form attached to the tip surface of the horizontal frame placed on the base. By rotatably supporting the lower surface of the piece, unlike the conventional vertical formwork mentioned above, there is no need for a formwork member to cover the entire surface of the L-shaped precast concrete member. It requires less amount of
Formwork can be easily assembled and dismantled.

Further, according to the formwork device of the present invention, the L-shaped formwork is rotated to a horizontal pedestal, and the one side formwork piece and the other side formwork piece of the L-shaped formwork are sequentially attached to the pedestal and the base. Since the concrete is poured by placing the concrete horizontally on top of the concrete, there is no need to remove the mold twice as in the conventional L-shaped precast concrete manufacturing method, and the work can be performed continuously.

Furthermore, since the concrete for both side parts of the L-shaped precast concrete member is poured from above into each formwork part of the L-shaped formwork in a horizontal state, the concrete is poured densely, especially for tiles. There is no risk of peeling off when driving. Furthermore, according to the present invention, it is possible to manufacture an L-shaped half-PC plate in which a portion of the reinforcing reinforcing bars protrudes from the concrete part.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view showing an example of a formwork for producing an L-shaped precast concrete member according to the present invention, and Fig. 2 shows an L-shaped formwork in the same production formwork.
A vertical cross-sectional view showing a state rotated by 90°, Fig. 3 is a perspective view showing a formwork for manufacturing a conventional L-shaped precast concrete member, and Figs. 4 and 5 show a conventional L-shaped precast concrete member. It is a perspective view showing a manufacturing process. DESCRIPTION OF SYMBOLS 1...Horizontal frame, 2...Base, 3...Bracket, 4...L-shaped formwork, 4a...One side formwork piece, 4
b...Other side formwork piece, 5...Bracket, 6...
pin.

Claims (1)

[Scope of utility model registration request] For manufacturing an L-shaped precast concrete member, characterized in that the lower surface of one side formwork part of an L-shaped formwork is rotatably supported on the end surface of a horizontal frame installed on a base. Formwork equipment.