JPH06262609A - Buried mold frame plate - Google Patents

Abstract

PURPOSE:To obtain excellent adhesive property of a concrete to be placed and make connection of separators possible. CONSTITUTION:Protruding streaks 4 and outer edges 6 are provided on inner sides of an outer plate section 3. Flanges 5 for connecting the separators 12 to the protruding streaks 4 are provided. A lining concrete 9 containing a coarse aggregate 10 is placed with successive pours in unset grooves 7 and 8. By an irregular face 11 where the coarse aggregate 10 is exposed by green cut, adhesive force to the concrete to be placed is heightened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an embedded formwork plate which is used as a formwork when pouring concrete, and becomes a part of a structure integrally with the concrete when the concrete hardens. .

[0002]

2. Description of the Related Art A buried form plate is generally made finely by using silica sand as an aggregate because its outer surface is the surface of a structure. However, since the structure is dense, the adhesion to the concrete to be poured is low, and it is difficult to bear the load together with the concrete, and when it is used only as a formwork and exterior material. There are many.

Therefore, a wire brush is applied to the surface,
Even if you apply a green cut method that sprays sand and roughens the surface, only a fine silica surface appears,
The roughness is low and the increase in adhesive strength cannot be expected so much.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to obtain an embedded formwork plate to which concrete to be poured can be firmly bonded.

[0005]

The construction of an embedded formwork plate for solving the above-mentioned problems is as described in claim 1 in which a formwork plate body made of dense concrete and coarse aggregate are mixed. Made of lined concrete, the formwork plate body,
An outer plate portion, a ridge extending in the longitudinal direction on the inner surface of the outer plate portion, and a flange at the tip of the ridge, the lining concrete is spliced to the inside of the outer plate portion when the mold body is uncured, It is characterized in that the surface is made uneven by the exposure of coarse aggregate.

[0006]

In the above-mentioned buried form plate, the ridge side is used as the inner surface, and the opposing flanges are connected by the separator to form a form, and concrete is poured into the form.

Since the surface of the lining concrete is uneven, adhesion of the concrete to be hammered in is good, and the flange of the ridge increases the bonding force of the concrete to be hammered in while the separator is locked.

[0008]

EXAMPLES Examples of the present invention will be described below. In FIG. 1 and FIG. 2, 1 is an embedded form plate, 2 is the form plate body, and because of its structure, it is made by extrusion molding, and the concrete used is mortar using only fine aggregate as aggregate, Alternatively, dense concrete in which small coarse aggregate is mixed in the mortar is used.

The mold plate body 2 includes an outer plate portion 3, a projecting ridge 4 projecting from the inner surface side thereof and extending in the longitudinal direction, flanges 5 projecting from both ends of the projecting ridge 4, and outer edges of both side ends. 6 is provided. Therefore, a groove 7 is formed between the ridges 4 and 4, and a groove 8 is also formed between the ridge 4 and the outer edge 6.

While the mold plate body 2 is extruded and uncured, the lining concrete 9 made of coarse aggregate is used to form the grooves 7 and 8.
It is spun on the inner surface and integrated. The lining concrete 9 is a concrete containing normal coarse aggregate 10. It is desirable to lightly compact the lining concrete 10 after splicing to strengthen the connection with the main body 2 side. Then, the surface of the lining concrete is green-cut to expose the coarse aggregate 10 and the uneven surface 11
Is formed. For this reason, the surface area becomes large, and when used as a mold, the concrete to be poured adheres strongly to the uneven surface 11.

In the figure, reference numeral 12 is a separator, and the separator 1
2, the left and right screws are provided at both ends, and a pair of clampers 13 are screwed in advance at regular intervals, and the flanges 5 of the embedded formwork plate 1 arranged to face each other are separated from the ends thereof. The clamper 13 is fitted to keep the space between the embedded formwork plates 1 and 1 constant to maintain the driving space.

This form plate body 1 is arranged in two or more rows with the ridge 4 side inside, or one or more pieces are used on one side to form U.
When a form or a rectangular tube is formed to form a form and concrete is poured into the form, each form plate main body 1 is integrated with the concrete to form one structure, and the outer plate part 3 is It becomes an exterior body, and the outer plate portion 3, the ridges 4, and the lining concrete 7 act as a part of the strength member.

It should be noted that one or both of the outer edges 6, 6 in the above embodiment may be omitted, and the groove 8 may be made flat.

[0014]

As described above, since the lining concrete is spliced on the inner surface of the uncured outer plate portion, the lining concrete firmly adheres to the outer plate portion. Further, since the lining concrete mixed with the coarse aggregate is green-cut, the coarse aggregate is exposed to form an uneven surface, and the concrete is firmly bonded to the concrete to be poured. Therefore, it is possible to form a strong structure in which the buried form plate and the concrete to be poured are integrated. Further, since the flange is provided at the tip of the ridge, it has the advantages that the separator can be joined and the joining force with the concrete to be poured is strengthened.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the present invention.

FIG. 2 Same as above

[Explanation of Codes] 1 Embedded Formwork Plate 2 Formwork Plate Main Body 3 Outer Plate Part 4 Protrusions 5 Flange 7, 8 Groove 9 Inner Concrete 6 Crude Aggregate

Claims (1)

[Claims] 1. A formwork plate body made of dense concrete and coarse aggregate are mixed to form an inner lining concrete, and the formwork plate body has an outer plate portion and an inner surface of the outer plate portion extending in the longitudinal direction. A ridge and a flange at the tip of the ridge, the lining concrete is spliced inside the outer plate portion when the mold body is not cured, and the surface is made uneven due to the exposure of coarse aggregate. An embedded formwork plate characterized by.