JPH0357589B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a wiring duct plug used in a wiring duct in which a plug is connected at an arbitrary length position.

[Background technology]

Conventionally, as shown in FIG. 8, as a plug used in a groove-shaped wiring duct 50 with conductors 51 provided on the inner surfaces of both flanges, a contact 52 is rotated 90 degrees to facilitate attachment and detachment to the wiring duct 50. Possible (arrow a
direction). The contact 52 is the conductor 5
1, and the plug blade 53 protrudes and retracts from the plug body 54 by rotation.

A lead wire 55 made of a flexible stranded copper wire is connected to the contactor 52 by soldering or the like, and a crimp terminal 56 is crimped to the other end of the lead wire 55. Crimp terminal 56
is connected to a terminal screw 58 screwed onto the terminal plate 57 of the plug body 54, and an electric wire for power extraction is connected to another terminal screw (not shown) screwed onto the terminal plate 57.

In this way, the contactor 52 is made movable, and the contactor 52
In the case where the terminal screw 56 on the fixed side is connected with the lead wire 55, the contact 5 is connected so that the lead wire 55 is smoothly twisted as the contact 52 rotates.
2 and the terminal screw 56 must be increased. Therefore, there is a problem that the entire plug becomes larger. Particularly, in the case of high-capacity plugs that flow large currents, the increase in size is remarkable.

In addition, the lead wire 55 is connected to the contact 52 and the crimp terminal 5.
6 and further connect the crimp terminal 56 to the terminal screw 58, the number of connection points increases to three. Therefore, there are problems in that the number of work steps increases and connection failures are also likely to occur. moreover,
Since the portion where the lead wire 55 is connected to the contact 52 is soldered, there is a problem in that workability is poor.
Instead of soldering, it is also possible to connect a crimp terminal to the lead wire 55 and connect it to the contact 52.
In this case, the structure becomes even more complicated.

[Object of the Invention] An object of the present invention is to provide a plug for a wiring duct which has a simple structure, can be miniaturized, and requires fewer connection points for lead wires for connecting contacts.

[Disclosure of the invention]

The plug for a wiring duct of the present invention has a contact rotatably provided in a plug body, and a plug blade that protrudes and sinks from the side surface of the plug body as it rotates and comes into contact with the conductor of the wiring duct. In the wiring duct plug, the base end of the contact is a pipe-shaped part, and both ends of a lead wire curved into a U-shape are inserted into the pipe-shaped part of the contact and crimped at the inner part of the pipe part. The curved portion of the lead wire is connected to a terminal screw screwed onto the plug body.

According to the configuration of the present invention, the lead wire is curved into a U-shape and both ends thereof are connected to the contacts, so that the lead wire can be directly connected with the terminal screw. Since the contact forms a pipe portion and has a structure in which the lead wire is directly inserted and crimped, the lead wire can be easily crimped and connected. Furthermore, the lead wire is crimped deep inside the pipe, and the lead wire can be twisted from the crimped point to the outlet, even if the distance between the contact and the terminal screw is short. The contact can be rotated sufficiently.

Embodiment An embodiment of the present invention will be described based on FIGS. 1 to 7. As shown in FIGS. 1 and 2, the contact 1 is shaped like a round bar, and has a plug blade 2 integrally formed at its tip for contacting a conductor of a wiring duct (not shown). A hole is formed in the proximal end portion of the contactor 1 to form a pipe portion 1a. A lead wire 3 made of a flexible copper stranded wire curved into a U-shape is inserted into the hole of the pipe portion 1a.
, and crimped at the crimping part 4 using a crimping tool.

The annular curved portion 3a of the lead wire 3 is directly connected to the terminal plate 5 by passing a terminal screw 6 screwed onto the terminal plate 5. 26 and 27 are a conductor plate and a washer through which the terminal screw 6 is inserted, respectively.

FIG. 3 is an exploded perspective view of the entire wiring duct plug. Contact 1 with lead wire in Figure 1 is 2
Use this book. That is, the two contacts 1 are inserted into the holes at both ends of the insulating frame 10 together with the pressure springs 13, and the non-rotating center contact 1' is inserted into the center hole of the insulating frame 10 and the center contact is pressurized. spring 14
Insert with. A head cover 11 is placed over the insulating frame 10, and these are fixed to a metal frame 16 with fixing screws 15. Contactor 1 plug blade 2
is made to protrude from a slit 17 formed between the head cover 11 and the insulating frame 10 so that it can be protruded and retracted freely by rotation. A contact portion 2' of the central contactor 1' protrudes from a hole in the upper surface of the head cover 11.

The metal frame 16 has a rotating fixing piece 18 for fixing the wiring duct plug to the wiring duct.
is attached to the upper surface by the rotating shaft 22, and the rotating shaft 2
A gear 19 with a lever is attached to 2. The lever gear 19 meshes with a gear 20 fixed to the contact 1 with a retaining ring 21, and can rotate the fixing rotary piece 18 and the contact 1 at the same time.

The metal frame 16 is fixed to the upper surface of the body 9 whose upper and lower surfaces are open, and the cover 12 is attached to the lower surface of the body 9. A terminal block 8 is housed within the body 9, and the terminal plate 5 and the terminal plate 5' for intermediate contacts are arranged in each partitioned space within the terminal block 8. The lower ends of the terminal plates 5, 5' are exposed at the bottom of the terminal block 8,
It is connected to an electric wire by a terminal screw 24.

The plug main body 7 is composed of a body 9, a terminal block 8, a metal frame 16, an insulating frame 10, and a head cover 11.

To explain how to use this wiring duct plug, insert the part above the body 9 into the lower surface of the wiring duct, and rotate the lever gear 19 by 90 degrees. As a result, the rotating fixing piece 18, which has been in the retracted state, protrudes and engages with the protrusion of the wiring duct, and is fixed to the wiring duct. At the same time, the contact 1 also rotates due to the rotation transmitted by the gear 22, and its plug blade 2 protrudes and comes into contact with the conductor of the wiring duct.

According to this configuration, as shown in FIG.
Since it is connected to terminal screw 6, lead wire 1 is connected directly to terminal screw 6.
You can connect with Since the lead wire 6 is directly connected to the terminal screw 6 in this way, the lead wire 6
There are only two connection points, the crimp part 4 and the terminal screw 6, and the number of connection points is reduced compared to the case where conventional crimp terminals are used. Therefore, the structure is simple,
Moreover, the number of man-hours is also reduced.

The contact 1 forms a pipe portion 1a, and the lead wire 3
Since the lead wire 3 is directly inserted and crimped, the lead wire 3 can be easily crimped and connected, and the entire wiring duct plug can be made compact. Further, the cross-sectional area of the contactor 1 and the lead wire 3 can be freely increased according to the current capacity without hindering compactness.

Furthermore, since the lead wire 3 is crimped at the deep end of the pipe portion 1a, the twisting of the lead wire 3 is absorbed in the portion of the pipe portion 1a from the crimped point to the outlet (range of dimension l ₁ in Fig. 1). Even if the distance _l2 between the contact 1 and the portion fixed by the terminal screw 6 is short, the contact 1 can be rotated sufficiently. Therefore, size reduction can also be achieved from this point of view.

〔Effect of the invention〕

In the wiring duct plug of the present invention, the lead wire is curved into a U-shape and both ends thereof are connected to the contacts, so that the lead wire can be connected in a straight line with the terminal screw.
Since the lead wires are directly connected to the terminal screws in this way, there are fewer connection points and the structure is simpler than in the case where conventional crimp terminals are used. The contact forms a pipe portion and has a structure in which the lead wire is directly inserted and crimped, so the lead wire can be easily crimped and connected, resulting in a compact design.
Furthermore, the lead wire is crimped deep inside the pipe, and the lead wire can be twisted from the crimped point to the outlet, even if the distance between the contact and the terminal screw is short. The contact can be rotated sufficiently. Therefore, also from this point of view, there is an effect that miniaturization can be achieved.

[Brief explanation of drawings]

FIG. 1 is a front view showing a contactor and a terminal screw in a wiring duct plug according to an embodiment of the present invention;
Figures 2A to C are a rear view, side view, and front view of the contact, Figure 3 is an exploded perspective view of the entire wiring duct plug, and Figure 4 is a sectional view of the terminal block. , FIG. 5 is a partial plan view of the same, FIGS. 6 and 7 are a longitudinal sectional view and a cross sectional view of the insulating frame, respectively, and FIG. 8 is a partial front view of the conventional example. DESCRIPTION OF SYMBOLS 1... Contact, 1a... Pipe part, 2... Plug blade, 3... Lead wire, 4... Crimp part, 5... Terminal board, 6... Terminal screw, 7... Plug body, 8... …
Terminal block, 9...Body, 10...Insulation frame,
16...metal frame, 18...fixing rotating piece.

Claims (1)

[Claims] 1. A wiring duct plug in which a contact is rotatably provided in a plug body, and the contact is provided with a plug blade that protrudes from the side surface of the plug body and comes into contact with the conductor of the wiring duct as the contact rotates. The proximal end of the contact is a pipe-shaped part, and both ends of a lead wire curved into a U-shape are inserted into the pipe-shaped part of the contact and crimped at the inner part of the pipe part, and the curved part of the lead wire is is connected to a terminal screw screwed onto the plug body.