JPH05311871A - Mold for manufacturing precast concrete and useage thereof - Google Patents

Abstract

PURPOSE:To improve the working efficiency by obviating the need of marking work in manufacture by obviating the need of the perfect dismantlement of a mold frame for manufacturing precast concrete which permits the demounting of a leg part frame and an upper part frame. CONSTITUTION:After iron reinforcements are arranged in a mold frame 1 for manufacturing precast concrete, concrete is laid into the mold frame 1. After hardening, an upper part frame 3 and the leg part frame member 8 of a leg part frame 2 are dismantlement-removed and the precast concrete is shifted. When the precast concrete is manufactured, the leg part frame 2, upper part frame 3, and a manufacturing bed B are cleaned. Further, the leg part frame 2 and the upper part frame 3 are assembled, having a leg part frame member 5 fixed on the bed B as standard, and the mold frame 1 is assembled. Further, on the inside of the leg part frame 2, an inclined surface 12 for facilitating the mold demounting of the precast concrete is formed. Accordingly, workability can be improved, and the breakage due to the dismantlement/shift is reduced, and the number of times of resistive use can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold for producing precast concrete and a method of using the same.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, the production of precast concrete has been carried out by placing concrete c in a form b having a reinforcing bar a therein. For b, the one in which the dam plate e is arranged in the framework of the frame in which the iron angle d is assembled is used.

On the other hand, in the manufacturing process of precast concrete, first, marking is performed on the manufacturing bed f in accordance with the shape of the precast concrete to set up the formwork, and the reinforcing bar a is arranged at the location where the marking is performed. Then, the mold b is installed at the marked out position and the concrete c is placed in the mold b.

[0004]

However, in such a method for producing precast concrete,
The formwork must be completely dismantled in order to demold or move the finished precast concrete. Therefore, it is necessary to move the formwork, and the number of times the formwork is used is limited to some extent due to damage to the formwork due to the movement.

Further, since the production bed and the formwork are cleaned after the precast concrete is demolded and the formwork is dismantled, when the precast concrete is produced subsequently, it is necessary to reposition the formwork. Since it was necessary to carry out marking, this marking was a daily work and was complicated.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and the purpose thereof is to:
To provide a precast concrete production formwork that eliminates the need for complete dismantling of the formwork when demolding or moving the precast concrete, thereby eliminating the need for marking out in the subsequent production of precast concrete. Especially.

[0007]

A precast concrete production form according to the present invention has a leg frame having at least one side removably fixed on a production bed, and a removably provided leg frame. Consists of the upper frame,
An inclined surface for demolding precast concrete is formed on the inner surface of at least one side of the leg frame.

The method of using the production mold of the present invention is as follows.
A method for forming precast concrete using a production mold comprising at least one side frame detachably fixed on a production bed and an upper frame detachably provided on the leg frame, wherein After concrete is placed in the casting mold and a predetermined strength is developed, when the precast concrete molded from this mold is demolded, the upper frame and at least one side portion of the leg frame are dismantled. However, the precast concrete is caused to rise upward along the inclined inner side surface of the other side portion of the leg frame facing the one side portion.

[0009]

In the mold for producing precast concrete according to the present invention, at the time of removing the precast concrete from the mold, at least one side of the upper frame and the leg frame is dismantled so that the remaining leg frames are removed. The precast concrete can be demolded without dismantling, and a new marking operation is not required when the precast concrete is subsequently manufactured.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a formwork for producing precast concrete according to the present invention. The formwork 1 for producing precast concrete is a precast concrete A (see FIG. 4).
(2) is a formwork used for pouring concrete in the production of the above), and is a leg frame 2 fixed on the precast concrete production bed B and an upper frame 3 fixed on the leg frame 2. The barrier plate 4 is provided as a main part.

As shown in FIG. 2, the leg frame 2 is formed by combining four leg frame members 5, 6, 7 and 8 into a rectangular shape according to the shape of the precast concrete A to be manufactured. It is detachably fixed on the production bed B.
The leg frame members 5, 6, 7 and 8 are attached to the manufacturing bed B by fixing bolts 9, 9, ....

For the leg frame members 5, 6, 7 and 8, square members are used, and wooden members are particularly suitable.

In particular, the leg frame member 5 is composed of a base 10 and a dam plate stopper 11 provided thereon, and the dam plate stopper 11 is fixed by the fixing bolts 9, 9 ... 10
Together with this, they are fixed to the production bed B together. That is, as shown in FIG. 3, the base 10 is tightened and fixed to the anchor bolt 20 erected on the production bed B by the long nut 21, and the fixing bolt 9 is screwed onto the nut 21. Together, the barrier plate stopper 11 is fixed by tightening.

As shown in FIG. 3, the base 10 has an inclined surface 12 on the inner surface of the base 10, and the precast concrete A is removed when the precast concrete A is released from the mold.
It is designed so that the end of the mold can be easily demolded. More specifically, the inclined surface 12 is formed to be slightly inclined outward from the lower end toward the upper end. This inclined surface 12
The inclination angle of is set in consideration of the height dimension of the base 10 in order to ensure the ease of demolding the precast concrete A.

Further, as the dam plate stopping member 11, a member having a width slightly narrower than that of the base 10 is used, and the weir is prevented by the inner end surface of the dam plate stopping member 11 and the inner end upper surface of the base 10. A barrier plate restricting surface 13 for holding the plate is formed.

The leg frame members 6 and 7 are formed so that the joint ends 6a and 7a to the leg frame member 5 can be closely adhered to the inner side surfaces of the base 10 and the dam plate stopper 11. With
Similarly, the joint ends 6b and 7b with the leg frame member 8 can be also closely joined to the leg frame member 8.

On the other hand, the upper frame 3 is constructed by assembling a plurality of upper frame members 14 made of square bars and is detachably fixed to the upper surface of the leg frame 2. The dam plate 4 is made of a flat plate material and is inserted into the framework of the form frame formed by the leg frame 2 and the upper frame 3. On this occasion,
The lower end of the barrier plate 4 inserted from above the leg frame member 5 is brought into contact with the barrier plate restricting surface 13, and the other leg frame members 6, 7,
The lower ends of the barrier plates 4, 4, ... Inserted from above 8 directly contact the upper surface of the production bed B, respectively.

Next, a work procedure for forming the precast concrete A by using the precast concrete manufacturing frame 1 configured as described above will be described.

After arranging the reinforcing bars C in the mold 1 for producing precast concrete, concrete is placed in the mold 1 (see FIG. 4A).

Next, waiting for the concrete to dry, the upper frame 3 and the leg frame material 8 of the leg frame 2 are dismantled and removed. The leg frame member 8 removed here is a leg frame member disposed at a position facing the leg frame member 5 having the inclined surface 12 formed therein (see FIG. 4B).

Then, the precast concrete A
Lifting hook D formed in advance on one side
, A hook of a crane (not shown) is engaged with the lifting wire E, and the crane can be pulled up to cause the precast concrete A that has been manufactured in a horizontal state or in a vertical state. The precast concrete A is moved by operation.

The hoisting hook D is formed on one side surface of the precast concrete A formed by the leg frame member 5 and the dam plate 4 located above the leg frame member 5.
Therefore, by pulling up the lifting hook D, the precast concrete A can be raised in an upright state with the end A1 of the precast concrete A on the leg frame member 8 side as a fulcrum (see FIG. 4 (c)).

Since the leg frame member 5 is formed with the inclined surface 12, the lower end portion of one side surface of the precast concrete A contacts the leg frame member 5 when the precast concrete A is caused. Can be easily triggered without.

Further, in the case of producing the precast concrete A subsequent to the above work,
After cleaning the leg frame 2, the upper frame 3 and the production bed B,
By assembling the leg frame 8 and the upper frame 3 with the leg frame members 5, 6 and 7 fixed on the production bed B as a reference, the mold 1 can be assembled without performing the marking work.

The precast concrete manufacturing form 1 according to the present invention is not limited to the above-mentioned embodiment, and the design can be changed appropriately.

That is, when the precast concrete A is demolded, all the leg frame members 6, 7 other than the leg frame member 5,
8 may be disassembled and removed.

[0028]

As described in detail above, according to the present invention,
At least one side of the leg frame remains fixed on the production bed when the precast concrete is removed from the mold, so it is possible to eliminate the marking work when subsequently producing the precast concrete and improve work efficiency. ..

Further, since the movement of the mold due to the dismantling can be reduced, the damage to the mold is reduced, and the life of the mold is improved compared to the conventional mold.

Further, since the leg frame has the inclined surface, the precast concrete can be easily demolded.

[Brief description of drawings]

FIG. 1 is a perspective view showing a formwork for producing precast concrete according to the present invention.

FIG. 2 is a perspective view showing an installed state of a leg frame of the manufacturing mold.

FIG. 3 is a sectional view taken along line III-III showing a main part of the leg frame.

FIG. 4 is a perspective view for explaining a work procedure for forming precast concrete using the manufacturing mold.

FIG. 5 is a cross-sectional view showing a conventional formwork for producing precast concrete.

[Explanation of Codes] 1 manufacturing form 2 leg frame 3 upper frame 4 dam plate A precast concrete B manufacturing bed

Claims (2)

[Claims] 1. A leg frame, at least one side portion of which is detachably fixed on the manufacturing bed, and an upper frame which is detachably provided on the leg frame. At least one side portion of the leg frame is provided. Formwork for producing precast concrete, characterized in that an inclined surface for precast concrete demolding is formed on the inner surface. 2. Molding of precast concrete using a manufacturing mold comprising a leg frame having at least one side portion removably fixed on the production bed and an upper frame detachably provided on the leg frame. In the method, after placing concrete in the production mold and drying it, at the time of releasing the precast concrete molded from this mold, at least one side portion of the upper frame and the leg frame and And disintegrating, and causing the precast concrete to rise upward along the inclined inner side surface of the other side portion of the leg frame facing the one side portion, using the formwork for producing the precast concrete.