JPH0448091Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a mounting hub for a box that can be easily attached to a box provided with only a knockout, and that can be used for both heavy and light electrical wiring, for example. A notch groove is provided on the insertion port side of the cylindrical mounting hub, and this notch groove is used to bend the mounting hub to change the diameter of the insertion port. The present invention relates to a mounting hub for a box which can be attached to a box by locking it into a knockout hole of the box.

(Prior Art) Conventionally, boxes with hubs have been used to connect conduits for light electrical wiring, and boxes with only knockouts have been used for heavy electrical wiring.

(Problem to be solved by the invention) However, when wiring for low electric current and heavy electric wiring are wired in one box, when the pre-installed box is a box for heavy electric wiring, does not have a hub for connecting conduits, and cannot be used for wiring related to light electricity.

The present invention was developed in view of these circumstances, and it can be easily installed into the knock-out hole of the box, can easily be used for low-power wiring, and can be used to easily and reliably install conduits. The purpose is to provide a mounting hub for boxes that can be used.

(Means for solving the problem) That is, the box mounting hub according to the present invention is
An insertion port with a locking part that locks into the box's knock-out hole at one end, a conduit insertion port into which a conduit is inserted at the other end, and a conduit inserted into the conduit insertion port that locks the conduit inserted into the conduit insertion port. A mounting hub for a box made of synthetic resin and having a locking pawl, and provided with a cutout groove extending from the insertion port toward the conduit insertion port, which reduces the diameter of the insertion port so that it can self-return due to its own elasticity. In order to enable the locking part to lock in the knock-out hole of the box and to provide the locking claw integrally with the inner surface of the conduit insertion opening, an opening with one side edge located at one end of the locking claw;
It is characterized by "equipped with".

(Example) Hereinafter, the present invention will be explained according to an example shown in the drawings.

In the figure, a mounting hub 1 is made of, for example, a hard synthetic resin such as ABS or vinyl chloride. The mounting hub 1 has a cylindrical shape as a whole, and has an insertion port 2 at one end for inserting into a knockout hole 21 of a box 20, and a conduit insertion port 3 for inserting a conduit P at the other end.

A locking portion is provided on the periphery of the insertion port 2. In the case of the embodiment, a locking projection 4 protrudes outward on the peripheral edge of the insertion port 2, and a fitting groove 5 behind which the peripheral wall of the knockout hole 21 of the box 20 is fitted.
The structure is equipped with Regarding the present invention, the structure of the locking portion is not particularly limited to that of the embodiment, and may be any structure as long as it can lock the mounting hub 1 from the knock-out hole 21 of the box 20 to prevent it from coming off. . The locking protrusions 4 have both sides cut off and are provided in pairs at opposing positions on the insertion opening 2, and form a taper that slopes toward the insertion opening 2, thereby preventing the box 20 from being knocked out. This makes it easy to insert the insertion port 2 into the hole 21.

A cutout groove 6 is provided from the insertion port 2 of the mounting hub 1 toward the conduit insertion port 3. In the embodiment, a cut is made vertically from the insertion port 2 toward the conduit insertion port 3 exactly in the middle of the pair of locking projections 4, that is, in the cut portions on both sides of each of the locking projections 4 described above. A cutout groove 6 is formed. This notch groove 6
The cutting range (cutting depth) is not particularly limited, and is cut to a depth that can bend the mounting hub 1 and change the diameter of the insertion port 2, thereby impairing the strength of the cylindrical mounting hub 1. It is best to install it to the extent that it does not.
Specifically, it varies depending on the material of the mounting hub 1, the thickness and size of the product, etc. The width of the cutout groove 6 may be such that the locking portion can be inserted into the knockout hole 21 of the box 20 with the mounting hub 1 bent. In the embodiment, the notch groove 6 extends from the width from the top of one locking projection 4 to the top of the other locking projection 4.
The width of box 2 is subtracted from the knockout hole 2 of box 2.
1. This allows the locking protrusion 4 of the locking portion to be inserted into the knockout hole 21.

In addition, in the embodiment, the insertion port 2 of the mounting hub 1
A pair of openings 7 are provided on the sides. Further, a pair of locking claws 8 for locking the electric conduit P are provided on the inner wall of the mounting hub 1. As shown in FIG. 5, the opening 7 makes it possible to manufacture the mounting hub 1 which is formed into a cylindrical shape and has a locking claw 8 integrally provided on the inner wall. The pipe P can be inserted into the mounting hub 1 and mounted securely. The electric conduit that is locked to the locking claw can be visually confirmed. Furthermore, the opening 7 serves as a finger rest when the mounting hub 1 is bent, and has the effect of preventing fingers from slipping.

Now, to explain an embodiment in which the mounting hub 1 configured as described above is attached to the knockout hole 21 of the box 20, as shown in FIG.
The diameter of the insertion port 2 is made smaller by bending the hole, and the locking protrusion 4 of the locking portion is inserted into the knockout hole 21.
Next, as shown in FIG.
Insert into the surrounding wall of 1. In this way, the mounting hub 1 is fixedly attached to the knockout hole 21 of the box 20 in a manner that prevents it from coming off. In the embodiment, since the locking protrusion 4 of the locking portion has a taper, the insertion port 2 of the mounting hub 1 is inserted into the box 2 as shown in FIG.
0 knockout hole 21, attach the mounting hub 1
When pressed from the conduit insertion opening 3 side, the locking protrusion 4 is inserted into the knockout hole 21 of the box 20, the mounting hub 1 is bent, and the peripheral wall of the knockout hole 21 is fitted into the fitting groove 5. The mounting hub 1 can be mounted in the knockout hole 21.

In this way, the conduit P is inserted into the mounting hub 1 attached to the knockout hole 21 of the box 20 through the conduit insertion opening 3. As shown in FIG.
It fits into the Pa and is locked in a non-removal state.
When the electric conduit P is a smooth tube, the locking claw 8 bites into the peripheral wall of the electric conduit P, thereby locking the electric conduit P. It should be noted that whether or not the end of the electric conduit P has been reliably inserted and locked into the mounting hub 1 can be confirmed through the opening 7 of the mounting hub 1, as shown in FIG.

(Effects of the invention) As described above, the mounting hub according to the present invention changes the diameter of the insertion port by bending it with the notch groove provided on the insertion port side, and the self-return of the insertion port allows the box to be knocked out. It can be easily installed in the hole and can easily be used for wiring related to light electrical current.

In addition, the opening with one side edge located at one end of the locking pawl allows the locking pawl to be integrated into the inner surface of the hub body, allowing the conduit to be installed by simply inserting the conduit through the conduit insertion opening. work can be done easily,
Furthermore, a locking pawl is provided inside to ensure the installation of the conduit. The electrical conduit that is locked to the locking claw can be visually confirmed through the opening, and the opening also has the effect of eliminating finger contact and finger slipping when the mounting hub is bent.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, with Fig. 1 being a perspective view thereof, Fig. 2 being a perspective view showing its usage state, and Fig. 3 being a perspective view of the present invention.
The figure is a front view seen from the outlet side, Figure 4 is a front view seen from the outlet side in the folded state, and Figure 5 is a front view seen from the outlet side.
The figure is a sectional view showing the state of die cutting, Figures 6 and 7.
The figures show how the box is installed in the knockout hole, Figure 6 is a sectional view before installation, Figure 7 is a sectional view after installation, and Figure 8 shows another example of how the box is installed in the knockout hole. Cross-sectional view, Figures 9 and 10
The figures are a cross-sectional view and a plan view of a state in which a conduit is inserted. In the figure, 1 is a mounting hub, 2 is an insertion port, 3 is a conduit insertion port, 4 is a locking projection, 5 is a fitting groove, 6 is a notch groove, 20 is a box, 21 is a knockout hole, P
is a conduit.

Claims (1)

[Claim for Utility Model Registration] An insertion port with a locking part that locks into the knockout hole of the box at one end, a conduit insertion port into which a conduit is inserted at the other end, and a conduit insertion port that is inserted into the conduit insertion port at the other end. This is a mounting hub for a box made of synthetic resin and has a locking pawl for locking a wire conduit, and has a cutout groove that reduces the diameter of the plug so that it can self-return due to its own elasticity. The locking part can be locked into the knock-out hole of the box by facing toward the pipe insertion port, and since the locking claw is integrally provided on the inner surface of the conduit insertion port, one side edge is positioned at one end of the locking claw. and an opening that
A mounting hub for boxes characterized by being equipped with.