JPH0373496B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an insulating trolley in which a conductor covered with an insulating cover is formed from a metal strip material that can be formed by roll forming or the like.

[Prior art and problems to be solved by the invention] In this type of conventional insulated trolley, conductors are formed by forming a single metal strip into a predetermined shape using a roll-forming machine. In many cases, the collector current collection surface is a flat or arcuate convex surface.

When such a conductor is buried in an insulating cover except for the collector current collecting surface to form an insulating trolley, if it is laid with the current collecting surface facing sideways, the current collector pressed from the side will swing downward and damage the insulating cover. In some cases, the insulating cover came into contact with the leg-like parts of the insulating cover, causing damage and causing problems in current collection.

In addition, as a conductor, the main body was formed by bending and forming a steel strip, and a current collecting surface was formed by attaching copper strips by caulking to both edges of the steel strip on the opposite side from the bent side. However, the connection between the conductors and the attachment part of the power supply terminal are made of steel strips, making it difficult to obtain a stable electrical connection. Since the caulked part with the strip material is close to the current collecting surface, the influence of changes in size and shape due to the caulking is significant, making it difficult to form a constant current collecting surface, making it difficult to improve the current collecting characteristics. Something difficult happened.

[Means for solving problems]

The present invention solves the above-mentioned problems of the prior art, and the solution is to continuously bend two metal strips as conductors along their length so as to put them together. A plurality of spaced apart leg-shaped parts are continuously formed in the length direction by a plurality of folds on the folded side, and between the plurality of leg-shaped parts there are gaps between the plurality of folded parts. An insulating trolley that has a groove-shaped current collecting surface formed by recessing the band part, and the part including both side edges extending to the opposite side excluding the groove-shaped current collecting surface is embedded in an insulating cover. be.

Both side edges of the above-mentioned bent metal strip extending to the side opposite to the bent side and the two-piece part connected thereto were embedded in the insulating cover and folded, so that it could be prevented from opening from both side edges in a leg-shaped manner. It can be suppressed. This means that it is possible to maintain the two-piece state without adding any means for closing the edges on both sides, but it is preferable to wrap separate strips and integrate them. good.

〔Example〕

A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. The conductor 1 has a general shape formed by continuously bending a single copper strip along its length to form a columnar section 6 made of two strips, and On the continuous folded side in the length direction, a plurality of folds 2, 2 are formed to form a plurality of leg-shaped parts 3, 3, and a band part 4 between the plurality of leg-shaped parts 3, 3 is formed. is recessed into a substantially V-shape to form a groove-shaped current collecting surface 5.

The conductor 1 shaped as described above can be continuously produced using a roll forming machine, and therefore can be used as a long conductor. However, it may be used as a standard size.

The conductor 1 can be given a predetermined bending rigidity by having the columnar part 6 made of two pieces, but corresponding to the bent side forming the groove-shaped current collecting surface 5,
Both side edges extending on the opposite side are bent in a direction substantially perpendicular to the columnar part 6 to form reinforcing edges 7, 7, and the steel strip material 8 is bent around the reinforcing edges 7, 7. By tightening, the plurality of leg-shaped parts 3, 3
It is possible to create a symmetrical rigid part with a rigidity equal to that of .

This steel strip material 8 can be made electrically conductive to the steel strip material 1 by caulking, so it can cope with an increase in current capacity. Furthermore, it can be used as a conductor for small currents by forming a portion corresponding to the band 8 by extrusion molding of a synthetic resin, making it easy to accommodate a variety of capacities.

When a plurality of such conductors 1 are used by connecting them as a unit, this can be done by connecting a joint fitting or a power supply terminal to the columnar part 6 of the two sheets of the copper strip 1.

The conductor 1 constructed as described above is covered with an insulating cover 9 extruded from a synthetic resin such as hard vinyl chloride using an extruder to form a desired insulating trolley.

The insulating cover 9 has a substantially U-shaped cross section and is covered with the conductor 1, and the groove-shaped current collecting surface 5 is exposed at the opening between the pair of legs 10 formed on one side, and the other leg The mounting portions of the shaped parts 3, 3, the two-piece columnar part 6, and the strip material 8 are embedded evenly, and the two-piece columnar part 6 and the terminal end side extending behind the groove-shaped current collecting surface 5 are embedded. The edges on both sides are tightened to prevent them from opening. This stripping also makes it possible to omit separate strips 8 that wrap around both side edge portions so as not to open.

Furthermore, in addition to enclosing the strip material 8 as in the above embodiment, the both side edges on one side of the columnar section 6 made of two sheets assembled by bending the strip material 1 are bent at right angles to the columnar section 6. both side edges 7 projecting outward;
A predetermined reinforcing structure can be obtained by further bending the tip side of 7 to form a folded portion.

Furthermore, in addition to being bent at right angles to the columnar part 6, the side edges 7, 7 can be bent so as to protrude almost symmetrically with the protruding manner of the leg parts 3, 3 forming the groove-shaped current collecting surface 5. It is also possible to make the shape of the conductor 1 vertically and horizontally symmetrical so that bending stress does not concentrate locally.

Now, the current collector is inserted between the pair of legs 10, 10 of the insulating cover 9 and pressed into contact with the groove-shaped current collecting surface 5. When the current collector moves, the current collector is moved to the groove-shaped current collecting surface 5.
When it tries to crawl up the slope of the current collecting surface 5, it is subjected to an action of trying to return to the bottom of the groove of the current collecting surface 5, that is, a centering action.

Therefore, especially when the current collector is installed with the current collecting surface facing sideways, the groove prevents the current collector from shifting downward due to its own weight and rubbing against the columnar part 10 of the insulating cover 9. This can be prevented by the centering effect on the shaped current collecting surface 5.

Note that the groove-shaped current collecting surface 5 may be formed in the shape of a gutter instead of being a substantially V-shaped recess.

〔Effect of the invention〕

As explained above, according to the insulated trolley of the present invention, since the current collecting surface formed on the conductor is groove-shaped,
It has a so-called self-centering function that prevents the current collector from coming off the current collecting surface even when used with the current collecting surface facing sideways. It will not cause damage or interfere with collector running.

In addition, in the process of folding two metal strips together, the resistance to bending becomes large due to multiple folds on the folding side, and the strip portion between which the current collecting surface is formed can be easily deformed by external force. Without,
Moreover, because the band is recessed and stretched between multiple folded parts, a current collecting surface with little machining error and high dimensional stability is obtained, which in turn dramatically improves current collecting characteristics. can be improved.

Furthermore, since the parts including both side edges extending in the opposite direction to the folded part on the current collecting surface forming side are buried in the insulating cover, the both side edges are prevented from opening and the predetermined conductor shape is maintained. Even if both edges are wrapped with separate strips, the position is far away from the current collecting surface, so there is no risk of distortion on the current collecting surface, and good current collection can be achieved. Does not affect characteristics.

Furthermore, in this type of conductor made of metal strip material, there was a problem when the main body was made of steel strip material and a copper strip material was used for the current collecting portion. This eliminates concerns about electrical connections between conductor connection fittings and power supply terminals, and improves the conductivity of the conductor body to ensure stable electrical connections.

[Brief explanation of drawings]

The accompanying drawing is a perspective explanatory view showing one embodiment of the insulating trolley according to the present invention. In the symbols, 1 is the conductor (copper strip material), 2 is the folded part, 3 is the leg-like part, 4 is the band part, 5 is the groove-shaped current collecting surface, 6 is the columnar part made of two pieces, and 7 is the side edges ( 8 is a separate strip (steel strip), 9 is an insulating cover, and 10 is a leg portion thereof.

Claims (1)

[Scope of Claims] 1. Consisting of two metal strips as a conductor, which are continuously bent along their length so that they are joined together, and on the folded side, a plurality of strips are formed at a distance from each other by a plurality of folds. Leg-like parts are formed continuously in the length direction, and between the plurality of leg-like parts there is a groove-shaped current collecting surface formed by recessing the band part between the plurality of folded parts. An insulating trolley characterized in that a portion excluding a groove-shaped current collecting surface and including both side edges extending on the opposite side thereof is embedded and suspended within an insulating cover. 2. The insulated trolley according to claim 1, wherein both edges of the bent metal strip extending on the opposite side from the bent side wrap and integrate a separate strip.