JPS5823612Y2 - Formwork for concrete block molding - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a formwork for forming concrete blocks.

Generally, as a formwork for forming a U-shaped concrete block (hereinafter referred to as a U-shaped block), for example, a medium plate having a cross section curved in an inverted U-shape is fixed on a rectangular underframe, and the disposing opposing outer mold plates of the movable structure forming the outer wall surface of the U-shaped block and opposing end mold plates of the movable structure forming the side edges of the U-shaped block around the frame;
By moving the outer mold plate and the end mold plate toward the underframe and vertically bringing them into close contact with the underframe on which the medium plate is fixed, concrete is poured into the space formed by them, molded and fixed, and then removed. When molding, the outer mold plate and the end mold plate are opened and the molded product is extracted.

However, it is important for such molds to be in close contact with each other in a substantially airtight manner at the joints between the mold plates.

If this adhesion is poor, the vibrator used when pouring concrete into the formwork may cause water to leak from the gap between the templates and the joint, or concrete may seep through the gap, causing the end surface of the product to Paris may be attached to the
Alternatively, concrete slag may adhere to the joints of the templates, resulting in defects such as part of the product being damaged when the product is removed from the formwork.

Therefore, in order to eliminate such drawbacks, the applicant of the present application provided a formwork shown in Japanese Utility Model Application No. 50-156557.

The structure of this formwork consists of a plurality of crosspieces that are curved so as to protrude outward from the end formboard on the outer wall surface of the end form plate. and horizontal bars joined together in a lattice pattern.

As a result, when clamping the mold, the elasticity of the curvature of the crosspiece was used to uniformly and strongly press the mold plates together, thereby strengthening the bond between the mold plates.

However, this structure requires at least two vertical beams and two horizontal beams, which requires a large number of parts, and these beams must be welded and fixed in a grid pattern, which requires a lot of man-hours and is expensive. It had some drawbacks.

The present invention was devised in view of the above-mentioned drawbacks of the prior art, and it is an object of the present invention to provide a formwork for forming concrete blocks that can firmly connect the form plates to each other with a small number of parts.

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

Fig. 1 is a perspective view showing one embodiment of the concrete block molding form according to the present invention, Fig. 2 is a front view of a reinforcing plate, Fig. 3 is a sectional view taken along the line A-A in Fig. 2, and Fig. 4 The figure is B- in Figure 2.
It is a sectional view taken along the B line.

Reference numeral 1 denotes an outer mold plate placed oppositely along the long side of an underframe (not shown), which is pivotally supported by a fulcrum shaft provided on the underframe to perform opening/closing operations.

2 is a medium-sized plate having a cross section curved in an inverted U shape and placed in the center of the underframe parallel to the outer mold plate 1; 3 is provided facing each other on the short side of the underframe. The two end mold plates, 4, are threaded members extending through the center of the medium plate 2 in parallel to the outer mold plate 1, with a right-handed thread on one end and a left-handed thread on the other end. These right-handed portions and left-handed portions are screwed into corresponding end mold plates 3, respectively.

Further, a handle 5 is fixed to one end of the screw member 4, so that the screw member 4 can be rotated from the outside.

Reference numeral 6 denotes a guide cylinder fixed to the end plate 3, which is fitted onto a guide rod (not shown) fixed to the middle plate 2 so that the end plate 3 slides thereon.

10.11 is formed by bending both ends of a plate having curved parts 10a and lla in the direction of the corner of the end mold plate 3 so that the central part thereof projects outward from the end mold plate 3, thereby forming an inclined part 10b, ll
This is a reinforcing plate which is made to have elasticity and has both ends fixedly or loosely installed on the outer periphery of the outer wall of the end mold plate 3.

These two reinforcing plates 10 and 11 are fixed to opposing end surfaces of the support plate 13 to which the nut 12 is fixed, and are formed in an X shape.

A threaded portion of a screw member 4 is screwed into the nut 12.

Next, the operation of the formwork having such a configuration will be explained.

To assemble the formwork, turn the handle 5 with the outer form plate 1 upright to the frame.
Since the screw member 4 has left and right threaded portions at both ends screwed into a nut 12 having internal threads in opposite left and right directions, the front and rear end mold plates 3 slide toward each other, and Template 1
and is joined to the end face of the medium-sized plate 2.

In order to bring the front and rear end mold plates 3 into close contact with the end surfaces of the outer mold plate 1 and the middle mold plate 2 on both sides in a uniform and strong manner, when the handle 5 is further tightened, the nut 12 is propelled inward by the rotation of the screw member 4. The force is applied to the support plate 13 to which the nut 12 is fixed.
and then the reinforcing plate 10.1 fixed to the support plate 13
Join 1.

As a result, the reinforcing plates 10 and 11 press against the outer wall surfaces of the front and rear end mold plates 3, and as the tightening progresses, an elastic force acts due to the curvature of the reinforcing plates 10 and 11.
．． The tips of the inclined parts 10b and llb of 11 apply from the four corners of the outer wall surface of the front and rear end mold plates 3 to the center, and while pressing the outer wall surface of the end mold plate 3, the surface is moved from the center of the surface to the outer circumferential direction. Works to prolong it.

Therefore, the peripheries and central portions of the front and rear end mold plates 3 are warped, and the front and rear end mold plates 3 are evenly and strongly pressed against the outer mold plate 1 and the middle mold plate 2.

As is clear from the above explanation, according to the formwork for forming concrete blocks according to the present invention, each template can be firmly and uniformly fixed with two reinforcing plates formed in an X shape,
Compared to the conventional method, the number of parts is smaller and the welding work is simpler, so an inexpensive device can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the concrete block molding form according to the present invention, Fig. 2 is a front view of a reinforcing plate, Fig. 3 is a sectional view taken along the line A-A in Fig. 2, and Fig. 4 The figure is B- in Figure 2.
It is a sectional view taken along the B line. 1...Outer mold plate, 3...End mold plate, 10.
11... Reinforcement plate, 10a, 11a...
Curved portion, 10b, llb...slanted portion.

Claims (1)

[Scope of utility model registration request] In a formwork for forming a concrete block by disposing opposing outer form plates forming the outer wall surface of the concrete block and opposing end form plates forming the side edges of the concrete block on the underframe, A formwork for forming a concrete block, characterized in that a curved reinforcing plate and a supporting plate fixed to the reinforcing plate are formed in an X shape and attached to the end template.