JPH0237220Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention has an opening in the bottom surface, and a conduit insertion hole in the side wall that communicates with the opening and into which the conduit is inserted,
The present invention relates to a fixture for a concrete buried object that protects the end of a conduit inserted into a conduit insertion hole and fixes an opening of the concrete buried object buried in a wall of a concrete building in close contact with a concrete formwork.

Concrete buried objects such as concrete boxes and end covers that have an opening in the bottom and a conduit insertion hole in the side wall that communicates with the opening are designed to house the end of the conduit inserted through the conduit insertion hole inside. It is buried in concrete to protect the ends of the conduit from the concrete. Therefore, the opening of a concrete buried object must be fixed closely to the concrete formwork to prevent concrete from flowing into the structure during concrete pouring.

However, among the concrete formworks that are erected facing each other, if the formwork on the side that fixes the concrete buried object is formed first,
Objects buried in concrete can be fixed from the inside of the formwork using fixing members such as nails by bringing the opening into close contact with the formwork. In the case where the concrete is formed after the concrete has been molded, it is not possible to directly fix the concrete buried object to the inner surface of the formwork using fixing members such as nails.

This means that the work of forming the formwork is usually done by the builder, and the work of fixing the buried concrete objects is done by the electrical contractor. ,
This is due to the fact that it is completely impossible to predict which formwork will be formed first.

As a result, if the formwork on the side that does not fix buried concrete objects is formed first, that is, if the formwork on the side that fixes the buried concrete objects is formed later, when concrete is poured, Concrete often flowed into the buried concrete through the openings, making wiring work impossible after the formwork was removed, and the concrete had to be chiselled.

In view of these problems, the present invention focuses on the use of conduits, since objects buried in concrete accommodate the ends of conduits inserted through conduit insertion holes, and are buried in concrete. When the formwork for fixing the concrete buried object is to be formed later without special processing on the existing concrete buried object, the opening of the concrete buried object can be easily fixed closely to the formwork. The purpose is to prevent concrete from flowing into concrete buried objects.

In other words, the present invention has an opening in the bottom surface, a conduit insertion hole in the side wall that communicates with the opening and into which the conduit is inserted, and protects the end of the conduit inserted into the conduit insertion hole. A fixing device for a concrete buried object that fixes the opening of the buried concrete object in close contact with the concrete formwork, which can be detachably attached to the end of a conduit inserted into the concrete buried object from the conduit insertion hole. It consists of a cap part to be attached and a hook part connected to the cap part. An object of the present invention is to provide a fixing device for a concrete buried object, which is characterized in that the opening of the concrete buried object is brought into close contact with the concrete form and is fixed by drawing the hook part to the inner surface of the concrete form.

The present invention will be explained below with reference to examples.

FIG. 1 is a perspective view of a fixture according to an embodiment of the present invention;
FIG. 2 shows a longitudinal sectional view of the fixture.

According to FIGS. 1 and 2, the fixture 1 is composed of a cap portion 2 having a cylindrical shape with a bottom and a hook portion 5 having a through hole 4 formed in a protrusion 3 protruding from the outer surface of the bottom wall. ing. A case will be described with reference to FIG. 3 in which the opening of a concrete buried object in which a conduit is inserted into the conduit insertion hole is tightly fixed to a concrete form using the fixture 1 of the present invention having such a configuration.

First, one formwork 6 is formed, and reinforcing bars (not shown) that form the supports of the concrete wall are arranged vertically and horizontally.
Next, the end of the conduit 7, which has been piped upright from below, is inserted into the conduit insertion hole 9 of the concrete buried object 8. In this embodiment, the concrete buried object 1 is a conduit end fixture commonly called a "pipe end cover," which has an opening at the bottom and an opening at the side wall that is inclined at a certain angle with respect to the opening surface. It has a conduit insertion hole 9 into which a communicating conduit is inserted. The cap part 2 of the fixture 1 is fitted onto the end of the conduit 7 inserted into the concrete buried object 8 through the conduit insertion hole 9, and the fixture 1 is attached to the end of the conduit 7. Formwork 10 is formed.

Thereafter, a through hole 11 is bored from the outside of the other formwork 10 at a position corresponding to the hook part 5, and a puller is inserted into the formwork 10. The hook has a hook-shaped hook portion 13 at one end, and a threaded portion 14 screwed around the outer periphery of the other end.
The hook fitting 12 is provided with a
The fixing tool 1 is attached to the formwork 10 by hooking the hook part 13 onto the hook part 5 and tightening the nut 15 from the outside of the formwork 10 to the threaded part 14 via the washer 16. Pull it inward. By pulling with this pulling tool, the end of the conduit 7 inserted into the concrete buried object 8 is pulled,
The opening of the concrete buried object 8 can be firmly and closely fixed to the inner surface of the formwork 10.

After this, a concrete wall is formed through the steps of concrete pouring and removal of formwork 6, 10, and the fixture 1 is removed from the end of the conduit 7 to be inserted into the concrete buried object 8, and inserted into the conduit 7. Perform wiring work. In this example, we have explained the case where the concrete buried object is an end cover that conventionally has no means of pulling it into the concrete formwork because its ceiling wall is inclined with respect to the opening surface. The concrete buried object to be fixed by the fixing device of the invention has an opening in the bottom, a conduit insertion hole in the side wall that communicates with the opening and into which the conduit is inserted, and the conduit is inserted into the conduit insertion hole. It is not limited to this example as long as it is buried in concrete while protecting the end of the conduit. In addition, in this example, the cap part of the fixture was fitted by fitting onto the end of the conduit inserted into the conduit insertion hole of the concrete buried object. In this case, a female thread may be formed on the inner circumferential surface of the cap portion for attachment, and the method for attachment and detachment is not limited at all as long as it can be attached to and detached from the end of the conduit. In addition, in this embodiment, the hooking part of the fixing device has a through hole 4 formed in a projecting piece 3 protruding from the outer surface of the bottom wall of the bottomed cylindrical cap part.
The hook, which is inserted from the outside of the formwork, is composed of a hook fitting and a nut, but in the present invention, the hook part is
The shape of the cap is not limited to the shape of this embodiment, and even if a wire such as a binding wire is used as the pulling tool, if it can be hooked and pulled with the pulling tool, it can be pulled from the outside of the bottom wall of the cap. It may have a protruding hook, and its shape can be changed as appropriate.

As described above, according to the fixing device of the present invention, by attaching it to the end of the conduit inserted into the concrete buried object through the conduit insertion hole of the concrete buried object, the fixing device can be installed from the outside of the concrete formwork. The opening of the concrete buried object can be firmly and closely fixed to the inner surface of the concrete form using the tool, and it is possible to prevent concrete from flowing into the concrete buried object during concrete pouring. This eliminates the need for concrete removal work, which is caused by concrete flowing into buried concrete objects, which has often occurred in the past, and the efficiency of wiring work is significantly improved. In addition, the fixing device of the present invention has a cap part that is installed by closing the tube end opening of the conduit inserted into the concrete buried object from the conduit insertion hole, so that Even if concrete flows into the pipe, the concrete will not enter the pipe, so there is no possibility that the wiring will become impossible during wiring work after removing the formwork. In addition, since it can be applied to all types of existing concrete buried objects, there is no need to perform special processing on these buried concrete objects in order to tightly fix them to the formwork. Since it is removably attached to the end of the pipe, it can be reused, contributing to cost savings.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a longitudinal sectional view thereof, and FIG. 3 is a view of the same in use. Explanation of symbols of main parts, 1... Fixture, 2...
Cap part, 5... Hook part, 7... Electric conduit, 8...
...Concrete buried objects, 6,10...Concrete formwork.

Claims (1)

[Scope of utility model registration request] Concrete embedding that has an opening on the bottom and a conduit insertion hole in the side wall that communicates with the opening and into which the conduit is inserted, and that the end of the conduit inserted into the conduit insertion hole is protected and buried in concrete. A fixture for a concrete buried object that fixes an object's opening in close contact with a concrete formwork, and is a cap part that is detachably attached to the end of a conduit inserted into the concrete buried object from a conduit insertion hole. and a hook section connected to the cap section. A fixing device for a concrete buried object, characterized in that the opening of the concrete buried object is brought into close contact with the concrete formwork and fixed by drawing it to the inner surface of the formwork.