JPH01149387A - Plug for wiring duct - Google Patents

Abstract

PURPOSE:To easily obtain a plug having large current capacity as well as miniaturize the plug by constituting a contactor and a pressing spring out of separate members and supporting nearly the whole length part of a supporting piece with a plug main body. CONSTITUTION:A bar-shaped contactor 9 is so inserted as to be freely in rotation in the hole of the plug main body and a plug blade 9a which projects or retreat from the plug main body by the rotation of this rotator 9 and contacts with the conductor of a wiring duct in the projected condition is provided, and a means to rotate the contactor and a pressing spring 13 to enerzize the contactor in the direction of plug blade projection are provided. The pressing spring 13 is provided with a pair of supporting pieces 13b on both ends of the base end of a flat spring-shaped pressing piece 13a and supported by the plug main body. For this reason, the contactor 9 and the pressing spring 13 can select material having quality required for each and the pressing spring 13 is supported by a wide area. Hereby, a small-sized one with large current capacity can be easily obtained and sure contact of the contactor can be obtained.

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, there are plugs for wiring ducts shown in FIGS. 14 to 16. In this case, a contact 105 for branching a load current by contacting a conductor 109 of a wiring duct 107 is formed of a temporary spring.

As shown in FIG. 15, the base end 105a of the contact 105 is fixed to the terminal block 110 inside the plug body 101, and by using this fixed part as a fulcrum and bending it with a cam 104, the tip can be bent away from the plug body 101. Submerged wiring duct 10
7 in contact with or away from the conductor 109. contact 105
contacts the conductor 109 as shown by the chain line in FIG. 15, and leaves as shown by the solid line.

The cam 104 is provided on the cam shaft 103 and is attached to the handle 10.
Rotate with 2. By rotating the handle 104, the 14th
As shown in the figure, the fixing piece 106 also protrudes and rotates, and the wiring duct 1
The plug body lot is fixed to the wiring duct 107 by sandwiching the lip part 1 (1B) of 07.

However, this conventional example has the following problems.

(2) Since the contactor 105 is formed of a temporary spring and is brought into contact with the conductor 109 of the wiring duct 102 with its spring pressure, it is difficult to obtain spring characteristics when making a large capacity plug. In order to increase the capacity, it is necessary to increase the cross-sectional area of the conductor 105 made of a leaf spring, but if the cross-sectional area becomes large, the spring property will be lost. In order to ensure springiness, a large structure is required, which poses difficulties in commercialization.

■For the material used for the contact 105, it is necessary to use a copper-based spring material with low electrical resistance and good conductivity in order to allow current to flow, but in general, non-ferrous copper alloys are used compared to ferrous spring materials. It has poor spring characteristics and is weak against heat. That is, it tends to become dull due to heat, and its springiness decreases.

■Since the contactor 105 faces the conductor 109 of the wiring duct 102 and moves toward and away from it while approaching and separating it, if the plug is connected or disconnected with the load connected, the contact point will be easily damaged by arcing. Reliability of contact area decreases. Also,
If insulating foreign matter adheres to the surface of the contact portion, there is a problem that it may not be removed and may come into contact with the contact portion.

In order to solve these problems, we considered a system in which the contactor is rotary and the contact pressure is obtained by using the contactor and another temporary spring. However, when the proximal end of the temporary spring, which presses against the contact at the tip, is embedded and fixed in the plug body, a large stress is applied to the spring fixing part of the plug body, which may cause the spring fixing part to deform due to long-term use. Characteristics change easily. If the embedded portion of the leaf spring is lengthened, changes in characteristics can be reduced, but the overall length of the leaf spring becomes longer, and the length of the plug increases accordingly.

[Purpose of the invention]

The purpose of this invention is to easily obtain a small size and large current capacity.
Moreover, it is an object of the present invention to provide a plug for a wiring duct, which allows reliable contact between contacts.

[Disclosure of the invention]

In the wiring duct plug of the present invention, a rod-shaped contact is rotatably loosely fitted into a hole in a plug body, and as the contact rotates, the contact protrudes and retracts from the plug body, and is inserted into the wiring duct in a protruding state. Provide a plug blade in contact with the conductor. A means for rotating the contactor and a pressure spring for biasing the contactor in a direction in which the blade protrudes are provided. The pressure spring is provided with a pair of support pieces extending toward the tip of the pressure piece on both sides of the base end of the pressure piece in the form of a plate spring whose tip is pressed against the contact, and approximately the entire length of the support piece is Supported by the plug body.

According to this configuration, since the contact through which current flows and the pressure spring that applies contact pressure are constructed as separate members, it is possible to select materials necessary for each of the contact and the pressure spring. The pressure spring has a pair of support pieces extending toward the tip of the pressure piece on both sides of the proximal end of a plate spring-shaped pressure piece whose tip is pressed against the contact, so By supporting the entire length with the plug body, it can be supported over a wide area. Therefore, even if the spring pressure is increased, there is no problem of change in spring characteristics due to deformation of the member supporting the pressure spring.

One embodiment of this invention will be explained based on FIGS. 1 to 13. As shown in FIG. 8, this wiring duct plug includes a plug body 1 that is partially inserted into an opening 3 along the longitudinal direction of the wiring duct 2, and a pair of levers for attaching and detaching the plug body 1. 4 is provided. The wiring duct 2 is approximately groove-shaped with a lip portion 2a, and there are 3 parts inside.
The main conductor 5 is exposed from the coating.

The plug main body 1 has a body 6, a cover 7 covering the lower surface of the body 6, and a head cover 8 provided above.

As shown in FIG. 8(C), plug blades 9a and 9a' of contacts protrude from both sides and the top surface of the head cover 8, and these plug blades 9a and 9a' contact each conductor 5 of the wiring duct 2. .

A metal frame 10 is provided on the upper surface of the body 6 (see FIG. 9), and metal frames 10 are provided at both ends of the body 6.
0, the fixing rotating piece 11 is attached to the fixed shaft 12. As shown in FIG. 8(C), the lip portion 2a of the wiring duct 2
The plug body l is fixed to the wiring duct 2 by vertically sandwiching the fixing rotating piece 11 and the metal frame 10.

FIG. 9 is an exploded perspective view of this wiring duct plug, in which the fixing rotary piece 11 is fixed by caulking or the like with the fixed shaft 12 via the metal frame IO, and the gear part 4a provided on the lever 4
into the square shaft part of the fixed shaft 12. Therefore, the lever 4 and the rotating fixing piece 11 rotate together via the fixed shaft 12. The contacts 9, 9' provided with the plug blades 9a, 9a' are pipe-shaped, into which a lead wire 23 is inserted and crimped. These contacts 9,9' each have a pressure spring 13°1
3' into the holes 15 and 15' of the insulating frame 14. The lower part of the insulating frame 14 fits into the long hole of the metal frame 10. 2 protruding below the insulating frame 14
A gear 16 is fitted to the lower end of each contact 9. The relationship between the contactor 9 and the gear 16, the structure of the contactor 9, etc. will be explained later.

The insulating frame 14 is covered with the end cover 8, and these are fixed to the metal frame 10 with fixing screws 19. contact 9
The plug blade 9a is made to protrude from a slit 20 formed between the head cover 8 and the insulating frame 14 so that it can be freely protruded and retracted by rotation.

The plug blade 9a' of the center contactor 9' is made to protrude from a hole in the upper surface of the head cover 8.

The metal frame 10 is fixed to the body 6 in a hugging state by the mounting piece portion 10a. The body 6 has an open top and bottom, and the gear 16, the gear portion 4a of the lever 4, and the terminal block 21 are housed inside. Three terminal boards 22 are arranged in each partition chamber in the terminal block 3, and these terminal boards 22
The lead wire 23 of the contact 9゜9' is attached to the upper end of the terminal screw 24.
Connected with

The lead wire 23 is made of a flexible steel strand and absorbs rotation of the contactor 9. An electric wire for taking out current is connected to the lower end of the terminal plate 22 by a terminal screw 25.

FIG. 1θ is an enlarged sectional view of the main part. The gear 16 fitted to the lower end of the contactor 9 is prevented from being removed by a retaining ring 17. The gear 16 has a concave portion on its upper surface that is loosely fitted into the boss 27 of the insulating frame 14 so as to be freely rotatable. The contactor 9 has protrusions 28 on both sides of the lower end.
This protrusion 28 fits into a cross-shaped keyway 16a (see FIG. 9) of the gear 16. Therefore,
When the gear 16 is rotated, the contactor 9 is also rotated.

As shown in FIG. 3, the gear 16 is the gear portion 4a of the lever 4.
When the lever 4 is rotated, the contact 9 is also rotated in conjunction with the lever 4. The gear portion 4a of the lever 4 and the gear 16 constitute an interlocking mechanism 30.

The pair of levers 4 are rotatable within a range between an angle in which they mutually open outward and an angle in which they mutually protrude toward the same side surface of the plug body 1. The rotation range is controlled by a lever protrusion notch 31 formed in the body 6 (see FIG. 9). The fixing rotating piece 11 is provided with a notch 11a to avoid interference with the insulating cover 14.

As shown in FIG. 1, the contact 9 has a hollow round shaft shape with a plug blade 9a at the tip, and a lead wire 23 (9th
10) are crimped and fixed using a crimping tool.

The pressure spring 13 is provided with a pair of support pieces 13b extending toward the tip of the pressure piece on both sides of the base end of a pressure piece 13a whose tip 3up is in pressure contact with the contact 9, and is made of a single plate as a whole. It is formed with a spring.

As shown in FIG.
It has a cross-sectional shape that is a combination of a convex portion 15b and a convex portion 15b, and a pressure spring 13 is housed in the convex portion 15b as shown in FIG. The support piece 13b of the pressure spring 13 has a convex portion 15b.
The support piece 13b is inserted into the narrow portion of the support piece 13b, and the support piece 13b is supported over substantially the entire length by its inner wall. A contact 9 is attached to the round shaft portion 15a.
is inserted.

The attachment and detachment of this wiring duct plug will be explained.

When installing, as shown in Figure 8 (A), press lever 4.
Insert the end cover 8 portion of the plug body l into the wiring duct 2 with the end cover 8 protruding from the side. In this state,
By rotating both levers 4 outward by about 90 inches, the fixing rotating piece 11 directly connected to the lever 4 is turned sideways as shown in FIG. (FIG. 8(C)). Therefore, the plug body l is fixed to the wiring duct 2. Also, since the lever 4 is engaged with the contact 9 via the gear 16, the contact 9 is also engaged. The plug blade 9a protrudes from the plug body 1 and comes into contact with the conductor 5 of the wiring duct 2.

To remove it, rotate the lever 4 toward the side of the plug body 1 in the opposite direction to the above. As a result, the fixing rotating piece 11 is oriented vertically as shown by the solid line in FIG. 7, and the plug blade 9a is retracted, allowing the plug body 1 to be pulled out.

Attachment/detachment is carried out in this way, but the contactor 9 is attached to the hole 15 so that it is tilted by θ with the base end R as the center against the force in the Q direction in Fig. 1O.
The contact pressure is applied by the pressure spring 13.

The pressure spring 13 is provided with a pair of support pieces 13b extending toward the tip of the pressure piece on both sides of the base end of a temporary spring-like pressure piece 13a whose tip is in pressure contact with the contactor 9. Since it can be formed to have approximately the same length as the pressure piece 13a, its dimensions are stable and it can be supported over a wide area. Since it is supported over a large area, large stress does not concentrate on the insulating frame 14 made of a molded product, and the holes 15 of the insulating frame 14 are not deformed. Since the dimensions are stabilized and the hole 15 is prevented from deforming in this way, there is no variation in the spring characteristics of the pressure spring 13, and stable pressure can be applied.

Since the support pieces 13b of the pressure spring 13 are provided on both sides of the pressure piece 13a, the overall length l of the pressure spring 13 (Fig. 2 (B)
)) can be shortened and the plug can be made smaller. Pressure spring 1
3 becomes wider, but there is generally some dimensional margin in this direction, so there is no problem even if the width becomes wider.

In addition, since the contact 9 that conducts current and the pressure spring 13 that applies contact pressure are composed of separate members, the pressure spring 13 can be made of a highly reliable general iron-based material that does not require good conductivity. Spring materials can be used. Further, since the contactor 9 does not require spring properties, a copper material with good conductivity can be used, and the cross-sectional shape can be freely made large, so that a plug with a large current capacity can be easily manufactured.

Further, since the contact 9 has a hollow shaft shape, the lead wire 23 made of a flexible stranded steel wire can be easily connected by crimping.

〔Effect of the invention〕

In the wiring duct plug of the present invention, the contact element that conducts current and the pressure spring that applies contact pressure are composed of separate members, so the pressure spring does not require good conductivity. Spring materials such as iron can be used. Further, since the contact does not require spring properties, a copper material with good conductivity can be used, and the cross-sectional shape can be freely made large, so that a plug with a large current capacity can be easily manufactured.

The pressure spring has a pair of support pieces extending toward the tip of the pressure piece on both sides of the base end of a plate spring-shaped pressure piece whose tip is pressed against the contact, so that approximately the entire length of the support piece is By supporting the plug body with the plug body, it can be supported over a wide area. Therefore, even if the spring pressure is increased, there is no problem of change in spring characteristics due to deformation of the member supporting the pressure spring, and stable support can be achieved. Since the support pieces are provided on both sides of the pressure piece,
The overall length of the pressure spring can be shortened, and the plug can be made smaller.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a contactor and a pressure spring according to an embodiment of the present invention, FIGS. 2A and 2B are a front view and a side view of the pressure spring, respectively, and FIG. A) and (B) are the same overall plan view and a plan view of the gear arrangement, FIG. 4 is the same side view, FIG. 5 is the same fracture pressure surface view, and FIG. 6 is the same with the cover removed. A side view, FIG. 7 is a cutaway plan view, FIG. 8 is an explanatory diagram of the installation process, FIG. 9 is an exploded perspective view, FIG. 10 is an enlarged cross-sectional view, and FIG. 11 is an exploded perspective view. 12 and 13 are respectively a cross-sectional view and a longitudinal sectional view of the insulating cover, FIG. 14 is a front view of the conventional example, FIG. 15 is a sectional view thereof, and FIG. 16 is a partially enlarged plan view thereof. Similarly, it is an exploded perspective view. DESCRIPTION OF SYMBOLS 1... Plug body, 2... Wiring duct, 4... Lever, 9... Contact, 9a... Bung blade, lO... Metal frame, 11... Rotating piece for fixation , 13... Pressure spring, 13a... Pressure piece, 13b... Support piece, 14
...Insulation frame, 15...hole Fig. 1] 3 (A) (B) Fig. 4 Fig. 5 Fig. 6 Fig. 7 Fig. 13b Fig. 11 Fig. 12 Fig. 13 Fig. 14 Fig. 15

Claims (1)

[Claims] A rod-shaped contact is loosely fitted into the hole in the plug body, allowing it to rotate freely.
The contact is provided with a plug blade that protrudes and retracts from the plug body by rotation of the contact and contacts the conductor of the wiring duct in a protruding state, and means for rotating the contact and moving the contact in a direction in which the plug blade protrudes. A pressurizing spring is provided, and the pressurizing spring is provided with a pair of support pieces extending toward the distal end side of the pressurizing piece on both sides of the proximal end of a plate spring-shaped pressurizing piece whose tip is pressed against the contactor. ,
A wiring duct plug in which substantially the entire length of this support piece is supported by the plug body.