JPH0420918Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention has a hook part that is placed with the opening facing the inner surface of the concrete formwork and hooks a hook inserted from the outside surface of the concrete form, and is pulled by the hook to close the opening. Concerning concrete objects that are closely fixed to the inner surface of concrete forms.

Conventionally, as this type of concrete buried object, there is a box having an opening, etc., in which a separate hook is attached to the approximate center of the inner surface of the bottom wall using screws or the like.

For such objects buried in concrete, the opening end surface is drawn evenly to the formwork, so when the hook is pulled in with the hook, the tensile load of the hook may be applied to the center of the inner surface of the bottom wall of the box, etc. Preferably, the hook is therefore provided only at the center of the inner surface of the bottom wall of the box or the like.

However, since the work of hooking a hook onto a hook is an invisible task from outside the formwork, it is extremely difficult to hook a hook onto a hook that is only provided at the center of the inner surface of the bottom wall of a box, etc. The problem was that it was difficult to do so, and the work efficiency was low.

In addition, in the case of the buried object, the tensile load of the hook is applied to the approximate center of the inner surface of the bottom wall of the box, etc.
Since the above-mentioned pulling operation is also an invisible operation from outside the formwork, if the hooking metal fittings are pulled too much, problems such as deformation and even destruction of the concrete buried object have occurred.

The present invention was developed in view of these problems, and is used in concrete-embedded objects in which the opening is tightly fixed to the concrete formwork by hooking the hook with the hook and pulling it. It can be inserted from the outside of the formwork and easily hooked onto the hooks of buried concrete objects, while also preventing deformation or destruction of the buried concrete objects that would occur if the hooks were used to pull the buried concrete objects too far into the formwork. The purpose is to

That is, the concrete buried object according to the present invention is arranged with the opening facing the inner surface of the concrete form, and has a hook portion for hooking a hook inserted from the outer surface of the concrete form, and is pulled by the hook to close the opening. A concrete buried object that is closely fixed to the inner surface of a concrete form, the hook part is formed of a bar, and both ends are supported parallel to the concrete form between opposing side walls that form an opening. It is characterized by having a flange around the opening.

An embodiment of the present invention will be explained below. 1st
A and B in the figure show a concrete buried object commonly called a "pipe end cover," and the pipe end cover 1 has an inclined front wall 2 and an arc-shaped cross section that slopes from the front wall 2 toward the rear end. It has a back wall 3, and the front wall 2 and the back wall 3 form a triangular opening 4 on the lower surface.
is formed. In the figure, 5 is a flange provided at the periphery of the opening 4. The front wall 2 has an insertion hole 6 into which a conduit is inserted, and through holes 7, 7 are bored in the opposing side walls of the arcuate back wall 3, and a rod as a hook is inserted into the through holes 7, 7. A bar 8 is supported between opposing side walls with both ends of the bar 8 held. The bar 8 is then supported in such a way that it is parallel to the concrete formwork to which the pipe end cover 1 is later closely fixed. The bar 8 that serves as a hook is commonly known as a “wire”
Steel wire rods called , especially wires around No. 8 are suitable.

A case in which the pipe end cover 1 according to an embodiment of the present invention configured as described above is closely fixed to a concrete formwork will be explained with reference to FIG. 2. First of all,
One of the formworks 9 is propped up, and reinforcing bars (not shown) that form the supports of the concrete side walls are arranged vertically and horizontally. Next, insert the conduit 10 that has been raised from below into the insertion hole 6 of the pipe end cover 1, and then insert the conduit 10
Temporarily hold the pipe end cover 1 at 0. Thereafter, the other formwork 11 is placed against the frame 11, and a hole 12 is drilled at a position relative to the bar 8 serving as a hook. Formwork 1
1, insert the hook 13 into the hole 12, hook the hook 14 formed at one end onto the bar 8 serving as the hook, and screw the nut onto the threaded portion 15 threaded on the other end of the hook 13. 16 and tightening the nuts 16, the pipe end cover 1 is firmly and closely fixed to the formwork 11. In the figure, 17 is a washer. After this, concrete side walls are formed through a process of concrete pouring and formwork removal.
After removing the formwork, if the hooks interfere with piping and wiring work, they can be broken off on a bench or the like.

In this embodiment, wire is used for the hook, but synthetic resin or the like may be used as long as it has the same strength.

Although the pipe end cover has been described above as an embodiment of the present invention, it is of course applicable not only to this but also to objects buried in concrete such as wiring boxes.

As described above, in the case of the concrete buried object of the present invention, the hook part is formed of a bar supported parallel to the concrete formwork between the opposing side walls forming the opening. The hook can be hooked at any position on the bar supported between the side walls, increasing the hooking range, so the hook can be inserted from the outside of the concrete form and hooked onto the hook of the concrete buried object. Hanging work can be carried out easily, and the efficiency of work for closely fixing buried concrete objects to formwork is significantly improved.

In addition, in the concrete buried object of the present invention, the rod serving as the hook is supported between the opposing side walls forming the opening so as to be parallel to the concrete formwork, and a collar is further provided around the opening. This solves the problem of the bottom wall to which the hook is attached being curved, deformed, and even destroyed when the hook pulls the concrete buried object too much, which is the case with conventional concrete buried objects. be able to.

In addition, since the structure of the concrete buried object is only to construct the hook portion, it is possible to provide an inexpensive product.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the present invention, and FIG. 2 is a view of the same in use. Explanation of the symbols of the main parts, 1... Concrete buried object, 8... Bar material as a hook, 9, 10...
Concrete formwork.

Claims (1)

[Claim for Utility Model Registration] It is arranged with the opening facing the inner surface of the concrete form, and has a hook for hooking a hook inserted from the outside of the concrete form. It is a concrete buried object that is closely fixed to the inner surface, and the hook part is formed of a bar, and both ends of the hook are supported parallel to the concrete formwork between opposing side walls forming the opening. A concrete buried object characterized by having a rim around its periphery.