JPS5828415Y2 - hard vinyl electric box - Google Patents

Description

[Detailed explanation of the idea] This invention relates to an improvement of an electrical box with a hub.

Traditionally, hard vinyl electrical boxes for embedding in concrete have been used that do not have a hub, where knockouts are provided in the side wall of the electrical box so that holes can be punched out. For piping and for embedding in wooden panels, an electrical box with a hub is used, which has a hub for the piping socket only in the direction in which it is used.

Electrical boxes that do not have this hub and have punchings on the side walls have punchings on the four side walls of the box (eight side walls for octagonal ones), and the punches are punched in the direction necessary for connection to the piping. A hole is made by tearing the hole, and a flanged bushing called a connector and a socket hub are attached to this hole for use.

Therefore, this box is one type of electrical box.
It can also be used in cases where wiring pipes are connected on four sides (one to eight sides in the case of an octagonal type).

However, depending on the site where it is used, an electrical box with a hub may have a socket hub in only one direction, or it may have a socket hub in three or four directions. I have to use the electrical box I have.

Therefore, for electrical boxes with hubs, there are 24 combinations of 6 types from 1 side to 4 sides and 4 types of socket hub diameters (for wooden panels embedded, the hub inner diameter is 1 type). must be prepared.

As described above, since it is troublesome to manage the inventory of electrical boxes with hubs and to carry various types of electrical boxes to work sites, it is desirable to be able to obtain electrical boxes with hubs that can be used for a single type of general purpose. It is.

Furthermore, since the unit cost of an electrical box with a hub is much lower than that of attaching a connector to an electrical box without a hub, it would be even more preferable if it could be used in an electrical box embedded in concrete.

Therefore, the object of this invention is to provide a general-purpose electrical box with a hub that can be used for embedding in concrete so as to meet these demands.

To achieve this purpose, this invention pre-provides a hub on the side wall of the box, but there is no opening inside the hub, which is closed by the box wall with a punching notch. Therefore, appropriate openings can be made during use.

This prevents slag from entering the box from the unused hub during concrete pouring, and it can also be used for embedding in concrete.

In addition, in cases where the hub serves as a socket for piping, if the hub is too long and obstructs the placement of reinforcing bars, etc., the hub may be used with a screw that screws into the socket of the pipe, such as a brazed bushing of a connector. It may also be used as an attached hub.

This invention will be explained in more detail below with reference to illustrated embodiments.

FIG. 1 shows a front view and a longitudinal side view of a conventional box with a knockout, and FIG. 2 shows a front view and a longitudinal side view of a conventional box with a hub (one side exit).

The reference numeral 2 indicates a knockout, and the reference numeral 3 indicates a pipe receiving hub.

Furthermore, FIG. 3 is a front view showing the positions of six types of hubs, from one side to four sides, of the box with a hub.

Further, FIG. 4 is a partial cross-sectional view showing a state in which the knockout 2 is opened and the connector is attached to the box with a knockout.

In contrast, FIGS. 5 and 6 are a front view and a vertical sectional side view respectively showing a box with a socket hub and a box with a threaded hub according to this invention.

In addition, the code|symbol 4 is a notch for punching.

The electrical box with a socket hub shown in FIG. 5 is provided with a mounting bracket 6 for mounting the box body 5 on, for example, a wooden panel, and has screw holes 7 for mounting a cover plate as in a normal electrical box. have.

Socket hubs 8 are provided on three to four sides of the side wall 9 of the box, and punching notches 4 are cut in the inner side wall 9 of the hub 8.

When these three or four socket hubs 8 are to be used, the knockouts 10 inside the socket hubs 8 to be used are punched out and electrical wires and pipes (not shown) are connected thereto.

In this embodiment, socket hubs 8 are provided only on three sides of the side wall 9 of the box 1, and not on one side.

This is because there are significantly fewer cases where hubs are required in all four directions, and this allows the electrical box to be attached in contact with reinforcing bars or other structures.

However, hubs may be provided in all four directions.

In any case, it is sufficient to stock four types of boxes as in this embodiment, each having a hub 8 of a diameter corresponding to the type of pipe diameter.

The electrical box with the threaded hub shown in Figure 6 is
Normal cover plate mounting screw hole 7 on box body 5
have.

Threaded hubs 13 having the same effect as the flanged bushings 12 of the conventional connector 11 shown in FIG. 4 are provided on the four side walls 9 of the round box.

The inside of the hub 13 is closed with a side wall 9, and a notch 4 for punching is cut in the hub 13 so that the knockout 10 can be punched out as needed.
In order to connect electric wires and piping to the connector, a connector corresponding to the socket hub 14 of the connector 11 shown in FIG. 4 is screwed on and the piping is joined.

Therefore, by preparing a connector according to the diameter of the piping, the electrical box can be used for any purpose.

In the embodiment shown in FIG. 6, the hub 13 is short, so even if there is an unused hub, it does not get in the way.

As described above, according to this invention, a versatile box with a hub can be obtained like the conventional electrical box with a knockout, and it can also be used as an electrical box embedded in concrete.

[Brief explanation of the drawing]

Figure 1 is a front view and longitudinal side view of a conventional box with a knockout, Figure 2 is a front view and a longitudinal side view of a conventional box with a hub (one side exit), and Figure 3 is a front view and a longitudinal side view of a conventional box with a hub. FIG. 4 is a schematic front view showing the positions of hubs from one side to four sides of the box, FIG. 4 is a partial cross-sectional view showing a state in which a connector is attached to a conventional box with a knockout, and FIG. FIG. 6 is a front view and a longitudinal side view of a box with a socket hub, and FIG. 6 is a front view and a longitudinal side view of a box with a threaded hub according to the present invention. Description of symbols, 1: Electrical box, 2: Conventional knockout, 3: Conventional socket hub, 4: Notch for punching, 5: Box main body, 6: Electrical box mounting rib, 7: For mounting cover plate Screw hole, 8: Socket hub of the present invention, 9: Side wall of the box, 10: Knockout of the present invention, 11: Conventional connector, 12: Flange bushing of connector 11, 1
3: Threaded hub of the present invention; 14: Socket hub of the conventional connector 11.

Claims (3)

[Scope of utility model registration request] (1) An electrical box made of hard vinyl, which has a hub on the outside of the side wall of the box, and the inside of the hub is covered with the side wall with punched notches. (2) The hard vinyl electrical box according to claim (1), wherein the hub forms a pipe socket. (3) The hard vinyl electric pouch described in claim (1) for utility model registration, wherein the hub is a threaded hub that screws into a pipe socket.