JPH0321146Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to an insert stud for a deck plate, and more specifically, it is used when or after installing a deck plate on the ceiling or floor of a building. This invention relates to an insert stud used to lead out electrical wiring within a cell duct to a desired location.

[Conventional technology]

When forming the ceiling or concrete floor of a building, deck plates are laid between columns and beams. The deck plate is a steel plate formed with continuous peaks and valleys, and spaces (cell ducts) are secured inside the peaks or in the valleys to guide electrical wiring. And, for example, when laying the deck plate or after laying it,
The electrical wiring in the cell duct of the deck plate is drawn out to the desired location by penetrating the concrete layer cast on the deck plate. To penetrate the concrete layer, an insert stud is used that extends vertically across the room floor and the cell duct, allowing the wire to rise within the insert stud and be pulled out to the floor. .

Since such insert studs are used to secure a space through the concrete layer, conventionally, it has not been considered to connect an additional electrical conduit to the side wall of the cylindrical insert stud. Ta. Steel pipes are used because it is possible to use materials that are easy to use when manufacturing inserts such as insert studs, and simple drilling work can be done on-site in the side walls of the steel pipes. It was based on what was easy to do and not easy to do. Therefore, instead of directly connecting the conduit to the inserts, we adopted a cast object called a cell connector,
It was common practice to insert one side into the cell duct and connect the other side to the conduit. Another method was to provide a circular punch hole in the side wall of a ready-made rectangular box, which could be removed at the time of connection, and connect it to the end of the conduit. .

[The problem that the idea aims to solve]

In the conventional method as described above, insert studs cannot be used and other parts must be used, so there is a problem that the number of parts in the conduit connection structure increases. Additionally, if you try to use a different type of cell connector, you will not be able to access or inspect the connector when pulling out the wires from the cell duct to the conduit.
Another disadvantage is that the reliability of the wiring is reduced. On the other hand, when using a square box, a square hole must be drilled into the existing concrete layer.
It is nearly impossible to perform this drilling work mechanically. For this reason, there were problems in that each step had to be done manually, which resulted in extremely inefficient work, and that it was no longer possible to fit the rectangular box into the concrete layer.

By the way, Japanese Utility Model Publication No. 49-28633 proposes a rectangular exposed type electrical equipment outer casing.
In this case, a partially fragile knock-out part is pre-formed in a part of the outer casing of the electrical equipment, and when an attempt is made to pull out an electric wire from that part, the knock-out part is smashed and the electric wire, etc. is then guided. be able to. However, this electrical equipment outer casing is not an insert used on the deck plate, but is merely a casing, and does not have a structure suitable for attachment to the deck plate. Moreover, the shape is rectangular, and when attempting to pull out the electric wires in the deck plate after the concrete layer is formed as described above, there arises a problem that the installation work for using the wires is extremely complicated.

The present invention was developed in view of the above problems, and its purpose is to provide an insert stud that can be used to bring out electrical wiring from the cell duct of a deck plate where concrete is poured to the floor above. , the insert stud is made into a cylindrical shape so that the drilling work of the concrete layer can be carried out mechanically and efficiently;
Moreover, if you want to connect a conduit to the side wall of the insert stud later on, you can open the conduit connection port with simple work on site. A deck that realizes a product in which the fragile part for the opening can be easily molded, and the structure of the conventional insert stud can be adopted as is without using new separate parts. An object of the present invention is to provide an insert stud for a plate.

[Means to solve the problem]

This invention is for a deck plate in which the insert upper body is attached to the cell holes of the cell upper plate of the deck plate through bushings, and the electric wires wired to the cell duct can be drawn out through the insert upper body and above the concrete layer on the deck plate. Applies to insert studs.

As shown in FIGS. 1 and 2, the insert upper body 1 is formed into a die-cast cylindrical body, and the upper inner surface of the insert upper body 1 has a female insert that engages with the screw of the cap 6. screw 5
In addition, there is a female screw 5b on the inner surface of the lower part that engages with the screw of the bushing 3 attached to the cell top plate 4.
is engraved. A circular thin blind hole 2 formed during die-cast molding of the insert upper body 1 is provided in the side wall portion 1a of the insert upper body 1. When the thin blind hole 2 is broken, the side wall portion 1a of the insert upper body 1 is removed. A side hole is opened to which the electric conduit 7 can be connected from the side.

[Effect]

According to the above configuration, electric wiring can be drawn out from the cell duct of the deck plate to the floor surface above by applying the conventional insert stud directly into the concrete layer without using any other new parts. Since the insert upper body 1 is made of die-casting, the thin blind hole 2 can be easily formed in advance. Therefore, even if the thin blind hole 2 is easily opened with a hammer or the like at the work site and the electrical conduit 7 is later connected from the side of the insert body 1, a part of the concrete layer is removed and the electrical wire is removed. tube 7
If you let it crawl, you can easily connect it. In addition, since the insert upper body 1 is cylindrical, a new insert stud 8 is installed in the cell duct.
When installing the insert stud 8, by mechanically forming a fitting hole for the insert stud 8 in the poured concrete layer with a hole saw, etc.
It can be easily inserted. Further, even if the insert stud is already buried, by drilling a circular hole, the insert upper body can be accessed and a predetermined work can be performed.

[Effect of idea]

According to the present invention, instead of using conventional cell connectors or cell boxes, it is sufficient to use a conventional cylindrical insert with a thin blind hole, which reduces the number of parts required for the insert stud. This makes it possible to connect the conduit from the side. It can also be used in locations where cell boxes and the like cannot be used, and can be applied both to installation work before concrete pouring and to installation work after concrete pouring. In the case of installation work after pouring, it is necessary to make holes in the concrete layer, but these holes can be easily drilled with a rotary mechanical tool, and when installing square objects after pouring. The required laborious drilling work is avoided, making the work faster and less labor intensive.

〔Example〕

EMBODIMENT OF THE INVENTION Below, this invention is demonstrated in detail based on the drawing which shows the Example.

FIG. 1 shows an insert stud 8 having a short cylindrical insert upper body 1. The insert upper body 1 is made of die-casting, and a thin blind hole 2 is previously provided at a suitable position on the side wall thereof during molding. This is so that when the thin blind hole 2 is broken, a side hole for connecting the electric conduit 7 (see FIG. 2) is opened on the side wall surface of the insert upper body 1.

Reference numerals 5 and 5 indicate upper and lower female threaded portions of the insert upper body 1, and the female threaded portion 5a on the inner surface of the upper portion engages with a thread formed on the cap 6. Further, the female thread 5b on the inner surface of the lower part is adapted to be engaged with a thread carved on the outer periphery of the bushing 3.

4 is the cell top plate of the deck plate laid on the beam, and the bushing 3 is attached to the round cell hole.
The female threaded portion 5b of the insert upper body 1 is screwed into the female threaded portion on the outside thereof. Note that FIG. 2 shows a state in which the electric conduit 7 is attached to the insert stud 8 from the side.

Since this example is constructed in this way, when connecting the conduit 7 before concrete pouring, the thin blind hole 2 is broken and removed with a hammer or the like, and the conduit 7 is installed. On the other hand, if concrete has been placed on the deck plate and the conduit 7 is later to be connected to the side wall surface of the insert body 1 from the side, the concrete layer that has been placed is partially cut with a hole saw. After drilling a cylindrical hole and also drilling a hole in the cell top plate, attach the insert as shown in the figure, and connect the conduit from the side. Incidentally, once the connection work is completed, the insert upper body 1 may be covered with the cap 6.

As you can see from the above explanation, as in the past,
The conventional cylindrical insert can be used without using a cell connector or cell box, and a thin blind hole can be used, reducing the number of parts needed for the insert stud. However, it can also be used in locations where cells such as cell boxes are not available.
Since it is cylindrical, mechanical drilling work in the concrete layer is easy, and installation work after concrete is poured is extremely simple. Of course, even when it is desired to connect the electrical conduits 7 to the insert body 1 before concrete is poured, the electrical conduits 7 can be easily connected using the same procedure to diversify the electrical wiring.

[Brief explanation of the drawing]

FIG. 1 is a front view including a longitudinal section of an insert stud to which the present invention is applied, and FIG. 2 is a plan view showing a state in which a conduit is connected to the insert upper body. 1... Insert upper body, 1a... Side wall part, 2...
... Thin blind hole, 3 ... Bushing, 4 ... Cell top plate, 5a, 5b ... Female screw, 6 ... Cap,
7... Electric conduit, 8... Insert stud.

Claims (1)

[Claim for Utility Model Registration] The insert upper body is attached to the cell holes of the cell upper plate of the deck plate through bushings, and the electric wires wired to the cell duct can be drawn out through the insert upper body and above the concrete layer on the deck plate. In the insert stud, the insert upper body is formed into a die-cast cylindrical body, and the upper inner surface of the insert upper body has a female thread that engages with the screw of the cap, and the lower inner surface is attached to the cell upper plate. A female thread is cut into the insert upper body to engage with the screw of the bushing, and a circular thin blind hole is formed in the side wall of the insert upper body, which is formed during die casting of the insert upper body. 1. An insert stud for a deck plate, characterized in that a side hole is opened in the side wall of the body to which a conduit can be connected from the side.