JPS5933186Y2 - Grounded plug for wiring duct - Google Patents

Description

[Detailed description of the invention] The present invention relates to a grounding plug for wiring ducts, which is a plug that can be attached to any location of a wiring duct and has a plug blade in contact with the conductor on the inner surface of the wiring duct, and is equipped with a ground terminal. It is something.

As shown in Fig. 1, the wiring duct 1 has a metal core 3 covered with a synthetic resin insulating coating 4, and conductors 2 held by the insulating coating 4 on opposing inner surfaces. In order to supply power from the wiring duct 1 to electrical equipment, an insulating base 11 is inserted into the wiring duct 1 and is locked at the opening edge of the wiring duct 1, and an insulating base 11 is protruded from the outside surface of the insulation base 11. This is done by a plug 10Vc equipped with a plug blade 12 which is provided and comes into contact with the conductor 2.

When electrical equipment is to be grounded via the plug 10 and the wiring duct 1, an exposed portion 5 of the core 3 with the insulation coating 4 removed is formed on the inner surface of the wiring duct 1, and the plug 10, a grounding rod 13 is made to protrude from the center of the upper end of the insulating base 11, and the grounding rod 13 is connected to the core 3.
By contacting the exposed portion 5 of the wire, a grounding was established.

Here, a blade holder spring 18 is attached to each blade 2 as shown in FIG.
When attaching the blade holder spring 19 to the ground rod 13 via the ground terminal 14, the blade holder spring 19f! As is clear from FIG. 4, the blade holder 12 and the blade holder spring 18 must be placed at a position shifted from the blade holder spring 18 according to the standard. Although it can be fixed by incorporating it into the surface, the ground terminal 14 and blade holder spring 19
Conventionally, the ground terminal 14 was fixed to the insulating base 11 with screws, but this required a large number of assembly steps, was time-consuming, and caused vibrations. There was a risk that the screw would come loose.

The present invention has been devised in view of these points, and its purpose is to provide a grounding plug for a wiring duct in which a grounding terminal can be easily assembled and will not come loose.

Hereinafter, the present invention will be described in detail based on the illustrated embodiment. As shown in FIG. Earth rod storage space 16 located between spaces 15 and 15
A ground terminal storage space 11 is provided below the ground rod storage space 16.

Here, the earth rod storage space 15 is made wide except for the guide groove portions 20, 20 at the upper and lower ends thereof.

In addition, the ground storage space 11 is opened on the side of the insulating base 1 as shown in FIG. Form it.

The blade retaining spring 18 is attached to each plug blade 1) f attached to the lower end.
! The grounding rod 13 is stored in each plug blade storage space 15 so that its upper part can exert elasticity in the radial direction, and the grounding rod 13 is arranged so that its upper and lower ends are linear and coaxial, and the center part is arranged horizontally and horizontally. By bending the earth rod, the earth rod is stored in the earth rod storage space 16 so that the upper and lower ends are coaxial and in a straight line, exhibiting a spring property of expanding and contracting up and down.

The ground terminal 14 with the blade receiving spring 19 attached to one end has an elastic cut-out protrusion 22 on its upper opening, and is stored in the ground terminal storage space 11 by being pushed through its side opening. The projection 22 is fixed by locking it to the stepped portion 21.

After installing the earth terminal 4, attach the earth rod 13 to the insulating base 11, and connect the lower end of the earth rod 13 to the earth terminal 14.
Make contact with the top surface of the

Reference numeral 6 in the figure is a body that houses the blade holder springs 1B, 18 and 19, and is fixed to the lower end of the insulating base 11 with screws 1.

However, in the case of a lever, the ground rod 13 itself has a spring property and is prevented from flexing to the left and right by the guide grooves 20 and 20, and the ground rod 13 itself has the same number of bends on the left and right sides. Since they have the same shape, if the upper end comes into contact with the exposed part 5 of the core 3 and receives pressure, the earth rod 1
3 does not move left or right, and the lower end of the earth rod 13 always contacts the upper surface of the earth terminal 14 in a substantially constant state regardless of the amount of compression of the earth rod 13, that is, regardless of the contact pressure.

As described above, in the present invention, the ground terminal can be simply pushed into the ground terminal storage space through the side opening, and the elastic cut-out protrusion provided on the ground terminal will lock onto the inner surface of the edge of the side opening. This makes it easy to assemble the ground terminal and prevents it from loosening due to vibration.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an example of a grounding plug for wiring ducts, Fig. 2 is a side view of the same as above, Fig. 3 is an exploded perspective view of the present invention-embodiment, and Fig. 4 is a cutaway front view of the same as above. be. 1 is the wiring component, 2 is the conductor, 3 is the core, 5 is the exposed part,
10 is a plug, 11 is an insulating base, 12 is a plug blade, 13 is a grounding rod, 14 is a grounding terminal, 1T is a grounding terminal storage space, and 22 is a raised projection.

Claims (1)

[Scope of utility model registration request] It is a plug that has a plug on the outer surface of the insulating base that comes into contact with the conductor arranged on the inside of the wiring duct, and has a grounding rod protruding from the top end of the insulating base that contacts the exposed part of the metal core of the wiring duct. The ground terminal, in which the lower end of the earth rod that has spring elasticity in the vertical direction contacts the top surface, is stored from the side opening in the ground terminal storage space that opens laterally in the insulating base, and is inserted into the side opening edge. A grounding plug for wiring ducts, which is equipped with an elastic cut-and-raised protrusion that is secured to the inner surface of the wiring duct.