JPH0137831B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wiring duct with a ground electrode, and more specifically, a metal core 1 having a U-shaped cross section and opening downward is coated with a synthetic resin layer 2 to form a duct body 3. , a pair of power supply conductors 4 are arranged on both left and right sides inside the duct body 3, and a horizontal piece 5 of the metal core 1 is arranged.
Exposing the center part of the bottom surface in the left and right direction and attaching the ground electrode 6
This relates to a wiring duct with a ground electrode formed by forming a ground electrode.

In conventional wiring ducts with grounding electrodes, as shown in Fig. 1, a grounding conductor 7 was separately attached to the duct body 3', which contained a pair of power supply conductors 4', resulting in a complicated structure. There was a problem of high costs.

The present invention has been made in view of the above points, and its object is to provide a wiring duct with a grounding electrode that eliminates the need for separate attachment of a dedicated grounding conductor.

The present invention will be described in detail below based on the embodiments shown in FIGS. 2 and 3. The duct body 3 is formed by insert molding a metal core material 1 made of an iron plate or the like into a synthetic resin, and is formed by covering the outer periphery of the metal core material 1 with a coating synthetic resin layer 2. A pair of power feeding conductors 4 are disposed on both left and right sides inside the duct body 3 via conductor holding pieces 8 . The metal core material 1 is a long object with a substantially U-shaped cross section that opens downward.
A ground electrode 6 is formed by cutting out the covering synthetic resin layer 2 at the center in the left-right direction of the lower surface of the horizontal piece 5 so as to expose the entire length of the metal core 1 in the longitudinal direction. P in FIG. 3 is a plug, and a ground electrode 9 projects from the upper end of the plug P and on the central axis of the plug P. When the plug P is attached to the wiring duct A with a grounding electrode, the tip of the plug P is inserted into the wiring duct A with a grounding electrode, the grounding electrode 9 is connected to the grounding electrode 6, and then the plug P is attached. It is rotated in a horizontal plane about the central axis, connected to the power supply conductor 4, and fixed to the wiring duct A with a ground electrode. Note that the ground electrode 9 may have spring properties.

Since the present invention is constructed as described above, the grounding electrode can be formed using a metal core material without separately attaching a dedicated grounding conductor, thereby reducing the cost and improving manufacturing efficiency. Since it is formed in the center of the lower surface of the horizontal side, when the plug is rotated and installed, it will be located at the central axis of rotation of the plug, making it easier to design the plug and simply inserting the plug. It is possible to easily connect the ground electrode of the plug to the ground electrode of the wiring duct, and it has the advantage that the connection can be made securely regardless of the insertion rotation angle of the plug, making it easier to attach the plug. in this way,
The present invention uses a configuration in which the central part of the lower surface of the horizontal side of the duct body, which is formed by coating a metal core material with a synthetic resin layer, allows the grounding electrode of the plug to be connected to the grounding electrode of the wiring duct reliably. In addition to being easy to connect, wiring ducts can be manufactured with good productivity and at low cost by using the metal core inserted into the duct body for reinforcement.

[Brief explanation of drawings]

Figure 1 is a front sectional view of the conventional example, Figure 2 a, b, c
3 is a front sectional view, a bottom view, and a side view of the embodiment of the present invention, and FIG. 3 is an explanatory diagram of the operation of attaching the plug to the wiring duct with a ground electrode, in which 1 is a metal core material, 2
3 is a covering synthetic resin layer, 3 is a duct body, 4 is a power supply conductor, 5 is a horizontal piece, and 6 is a ground electrode.

Claims (1)

[Claims] 1 A metal core material with a U-shaped cross section that opens downward is coated with a synthetic resin layer to form the duct body, and a pair of power supply conductors are arranged on both left and right sides inside the duct body, and the metal core material is coated with a synthetic resin layer. A wiring duct with a ground electrode formed by exposing the center part in the left and right direction of the lower surface of one horizontal side to form a ground electrode.