JPH046401Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a construction insert that can be rationally attached from the outside of the formwork to attach wall joints, scaffolding, etc. when constructing a formwork for a wall or the like in the construction of a reinforced concrete structure or a steel-framed reinforced concrete structure.

BACKGROUND ART Conventionally, when attaching a construction insert to a formwork such as a wall in advance, an insert as described in, for example, Japanese Utility Model Application No. 58-151206 has been devised.

Problems to be Solved by the Invention In the above conventional technology, inserts are inserted from the outside of the formwork and the bolt is turned, thereby attracting the insert to the formwork side and reducing the elasticity of the rubber etc. inserted on the axis of the bolt. The insert is supported by expanding the body into the inner circumferential surface of the through hole of the formwork and tightly fitting it.

Therefore, the installation work is troublesome and work efficiency is significantly reduced.

In addition, since the attachment part to the formwork is supported by an elastic material such as rubber, the insert receives a strong vertical impact load directly during concrete pouring, causing the tip side to droop and become perpendicular to the formwork. becomes unsupportable.

Therefore, when attaching wall connecting fittings to the insert after the concrete has cured, it cannot be properly and securely attached, and there are many problems and drawbacks, such as the need for repair work and the need to drive another post-installation anchor. .

Means for Solving the Problems This invention was devised in view of the above-mentioned conventional problems, and its purpose is to make the insert installation work after formwork assembly simple, easy, and reliable. The object of the present invention is to provide a construction insert that is rational and practically useful while achieving high performance.

In addition, the construction insert of this invention has a bulge-shaped concrete sized to be inserted into the through hole provided in the formwork at one end of the body which is sized to be inserted into the through hole provided in the formwork. This is a construction insert in which an insert body in which an anchor part is provided with female threads from the end face of the other side toward the axis is attached with a mounting bolt from the outer surface of the insert body through a formwork, and the body diameter of the insert body A pedestal made of synthetic resin or the like that is the same size and has the required thickness, an elastic seat plate of the required thickness that has an outer diameter that locks onto the edge of the through hole provided in the formwork, and an inner circumferential surface of the through hole. On the other hand, a hollow sleeve having an outer diameter and a length equivalent to the thickness of the mold is inserted into and connected to the shaft of the mounting bolt.

Operation After the formwork is assembled, a through hole is provided at the required position of the formwork, the concrete anchor part and the insert body are inserted into this through hole, and the pedestal and elastic seat plate are inserted onto the mounting bolts. By allowing the elastic seat plate to pass through the hole and locking it to the edge of the hole, it is possible to prevent concrete slag from flowing out during concrete pouring, and at the same time, the insert body is always held at right angles by the sleeve inside the hole. This greatly eliminates the troublesome installation work after assembling the formwork, and can be done simply, easily, and reliably.

Embodiments Next, embodiments of the construction insert according to this invention will be described in detail with reference to the drawings.

FIG. 1 is an exploded perspective view of one embodiment.

In the figure, reference numeral 1 denotes an insert main body, which has a bulging shaft 3 integrally fixed with a concrete anchor part 2 at one end of a body part 1a, and a female thread part 4 at the other end.

Reference numeral 5 indicates a mounting bolt which is screwed into the female threaded portion 4 of the insert body 1, and 6 indicates this mounting bolt 5.
7 is an elastic seat plate made of rubber or the like, 8 is a sleeve made of hard synthetic resin or the like, and 9 is a washer.

The size of the concrete anchor part 2 of the insert main body 1, as well as the outer diameter of the body 1a, pedestal 6, and sleeve 8, are slightly smaller than the inner diameter of the hole to be drilled in the formwork. be.

Further, the length of the sleeve 8 is approximately equal to the thickness of the formwork.

A construction example in which the construction insert of the first embodiment is used will be described.

As shown in Fig. 2, holes are drilled at the required positions in the pre-assembled formwork P such as a wall, the concrete anchor part on the tip side of the insert body 1 is inserted into the hole, and then the body part 1a, push in the pedestal 6 and elastic seat plate 7.

As a result, the elastic seat plate 7 passes through the inner edge of the through hole of the formwork, expands and locks at the edge.

Therefore, the insert main body 1 is attached horizontally to a formwork P such as a wall.

After pouring concrete and curing, the formwork P is dismantled by simply loosening the mounting bolts 5, the elastic seat plate 7 is taken out, and an eye bolt A such as a wall connecting fitting is screwed into the insert body 1 for use. .

According to one embodiment of this invention as described above, the insert mounting operation after assembling the formwork can be performed simply, easily, and reliably from the outside of the formwork.

Therefore, compared to the conventional construction method in which workers are placed inside and outside the formwork, it can be easily carried out by one person, has great economical effects, and has a remarkable effect on improving work efficiency.

Effects of the invention As explained in detail above, according to this invention, the insert can be installed efficiently and reliably by the simple operation of pushing it from the outside of the wall or other formwork after assembly. It can be constructed economically with less labor, and it is possible to obtain a construction insert that is excellent in practical use.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of an embodiment of the construction insert of this invention, and FIGS. 2 and 3 are partial longitudinal sectional views showing the same in use. 1...Insert body, 5...Mounting bolt, 6
...Pedestal, 7...Elastic seat plate, 8...Sleeve, P
...Formwork.

Claims (1)

[Scope of utility model registration request] At one end of the body, there is a bulging concrete anchor part large enough to be inserted into a through hole provided in the formwork, and at the other end, an insert body is provided with a female screw part, and the insert body is inserted through the formwork. A construction insert that is attached from the outside surface with a mounting bolt,
a pedestal made of synthetic resin or the like having the same size and required thickness as the body diameter of the insert body; and an outer pedestal that engages with the rim of a through hole provided in the formwork and which is approximately the same size as the body diameter of the insert body. An elastic seat plate with a diameter and a required thickness, and a hollow sleeve with an outer diameter that can be inserted into the inner peripheral surface of the through hole and a length equivalent to the thickness of the formwork are attached to the mounting bolts. A construction insert characterized by being inserted and connected on the shaft.