JPS6344511Y2 - - Google Patents

Description

[Detailed description of the invention] The technique of building a formwork and pouring concrete to form a retaining wall or the like is well known. In this case, it is well known that the front and rear formworks are fixed by providing a cone-shaped formwork receiver on a plate-shaped separator connected to both ends of an angle bar, sandwiching both ends of the separator between the formworks, and tightening them with clips. It is being

The present invention relates to a plate-shaped separator used in such a formwork construction method.

Conventionally, in such formwork construction methods, if a metal plate-shaped separator protrudes from the retaining wall after concrete is poured, it will rust and stain the retaining wall surface. Later, this is extracted, a cone-shaped cavity is formed on the retaining wall surface, the tip of the separator protruding into the cavity is cut off, and the cavity is filled with mortar to prevent the separator from being exposed on the retaining wall surface. However, over time, due to the difference in shrinkage rate of the mortar filling the void,
They often break away and cause problems. As a countermeasure to this problem, if the mortar filling cavity is formed in a cone shape in the opposite direction to the conventional one, separation can be prevented, but it is difficult to remove the catch, and if the cavity is made deep, it is effective, but the separator is weak against impact. There are restrictions on arranging mortar in an inclined manner, and no effective measures have been found to prevent mortar from falling off. Therefore, in order to prevent the filled mortar from falling off, the present invention has a wide engagement part at the tip even after the separator tip is cut, and the tip is formed to a length that does not reach the large end surface of the cone-shaped formwork seat. The continuous engaging protrusions remain in the mortar filling recess.

Hereinafter, the present invention will be described in detail based on specific embodiments shown in the accompanying drawings.

A metal plate-shaped separator is bent and formed into a hat-shaped cross section except for the tip, and consists of a flat plate part 1 which is held within a mold and a bent part 2 which is positioned to protrude between the molds. A mounting part 11 for a cone-shaped formwork seat 4 is formed between the flat plate part 1 and the bent molded part 2, and the cone-shaped formwork seat 4 made of resin and halved is externally fitted therein.
There is a U-shaped clip insertion hole 5 in the center of the flat plate part 1.
An insertion hole 7 is formed in the vertical wall of the bending molded portion 2 for connection to the angle bar 6 with a pin.

A cutout hole 10 passing through the flat plate part 1 in the thickness direction is provided at the center in the width direction of the mounting part 11, and the cutout hole 10 has a wide engagement part at its tip facing toward the flat plate part 1. The engaging protrusion 9 is formed in such a length that its tip does not reach the large end surface 4a of the cone-shaped formwork seat 4. The engagement protrusion 9 has only its base left connected to the bending molded part 2, and the cutout hole 10
Cutting lines 8 are cut at the connection portions of the mounting portions 11 with the bending molded portions 2 on both sides of the holder. Further, the engaging protrusion 9 has a length that does not reach the large end surface 4a of the cone-shaped formwork seat 4, and may have any shape as long as it has an engaging portion that widens at the tip.

Then, the cone-shaped frame receiving seat 4 is externally fitted onto the mounting portion 11 of the flat plate portion 1 of the separator of the present invention having such a structure. The large end surface 4a of the catch seat 4 coincides with the concrete outer surface line (the straight line portion of the two-dot chain line in FIGS. 1 and 2).

Therefore, when the concrete poured after setting the separator hardens and the flat plate part 1 is bent and removed from the cutting line 8, the catch seat 4 will fall off by itself because there is nothing to hold it against. A conical concrete recess remains, and an engaging protrusion 9 protrudes from the bottom thereof, which is connected to the separator and has a wide engaging portion at its tip. When the recess is filled with mortar, the mortar solidifies and firmly engages the engagement protrusion 9, even if the recess tapers in the forward direction.
Unlike in the past, there will be no withdrawals.

The present invention has a simple structure in which a cutout hole and an engaging protrusion are simply connected to a plate-shaped separator that has been used in the past, and can easily prevent the filled mortar from separating.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a specific embodiment of the plate-like separator for constructing formworks of the present invention, and FIG. 2 is a side view of FIG. 1. DESCRIPTION OF SYMBOLS 1...Flat plate part, 2...Bending molding part, 4...Cone-shaped formwork seat, 4a...Large end face, 8...Cutting line,
9... Engaging protrusion, 10... Cutout hole, 11... Mounting part.

Claims (1)

[Scope of utility model registration request] The thickness of the flat plate part 1 is placed at the center in the width direction of the mounting part 11 of the cone-shaped formwork seat 4 formed between the flat plate part 1 held between the formworks and the bent molded part 2 protruded into the formwork. A cutout hole 10 passing through in the horizontal direction is provided,
In the cutout hole 10, an engaging protrusion 9 is provided which faces toward the flat plate part 1, has a wide engaging part at its tip, and has a length that does not reach the large end surface 4a of the cone-shaped formwork seat 4. , a formwork construction board characterized in that only the tack is left connected to the bending molding part 2, and cutting lines 8 are carved in the connection parts of the mounting parts 11 on both sides of the cutout hole with the bending molding part 2. shape separator.