JPS5828403Y2 - Rubber slider for current collection - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a current collecting rubber slider, and particularly to a protection structure for a lead wire attached to a current collecting element of the current collecting rubber slider.

The present applicant has solved problems such as disconnection, spark discharge, sliding noise, and early wear caused by unsatisfactory vibration absorption performance in a conventional sliding type current collector consisting of a metal current collector sliding plate and a pantograph. In order to achieve this, according to an invention such as Japanese Patent Application No. 52-37056 (Japanese Unexamined Patent Publication No. 53-124814), a current collecting part in which a current collecting element made of a conductive metal is supported by a spring member made of a rubber elastic body; In addition to proposing a sliding type current collector in which a load support part that is independent of the current collector part and has a spring constant that is sufficiently larger than the spring constant of the current collector part is mounted on the same substrate,
A number of inventions have been made which are distantly related to the reduction in the spring constant of the current collecting part in the current collecting device, and which aim to reduce sliding noise, improve followability to power lines, improve vibration damping performance and safety, etc. proposed an idea.

In the sliding type current collector proposed by the present applicant, when the device is pressed against the power supply line, most of the load is borne by the load support part, and the current collection part collects current from the power supply line. Since it is sufficient to have an extremely low spring constant sufficient to maintain constant contact with the power supply line, the current collector itself is prevented from separating from the power supply line, and wear and sliding noise levels of the current collection part are significantly reduced. Therefore, all the members attached to the current collecting section, including the spring members that support each current collecting element, are constructed to meet the purpose of reducing the spring constant. It requires that.

In order to meet this requirement, a highly flexible plain braided copper wire was used as a lead wire to electrically connect each current collecting element 4 to the substrate 3, as shown in FIG. 2, for example. If paint is applied to the surface of the lead wire for rust prevention and waterproofing, a portion of the paint will penetrate between the strands of the lead wire and become rigid as a whole, preventing the current collector from achieving a low spring constant. In addition, this resulted in increased bending fatigue of the lead wire.

This invention was made with the aim of eliminating such drawbacks.
Basically, the flexible lead wire that electrically connects the current collecting element and the substrate is covered with a closed-cell foamed rubber elastic body having a smaller spring constant than the spring member that supports the current collecting element. That is.

The present invention will be explained below with reference to illustrated examples. The current collecting rubber slider according to the present invention includes a plurality of conductive metals, such as iron, brass, phosphor bronze, sintered alloy, etc., arranged in parallel with each other. A current collecting unit 1 that supports current collecting elements 4 with spring members 5 made of rubber elastic material is independent of the current collecting unit 1, and has a spring constant that is sufficiently smaller than the spring constant of the current collecting unit. The load support part 2 is made of a sliding plate 6 made of a slippery and highly abrasive material such as nylon, Teflon, polycarbonate, polyethylene, oil-impregnated plastic, oil-impregnated wood, etc., supported by a spring member 7, on the same substrate 3. It will be attached to.

Each current collecting element 4 is connected to the substrate 3 by a highly flexible lead wire 8 such as a plain knitted copper wire, and more specifically, a mounting plate 9 made of a conductive metal vulcanized and bonded to the lower end of the spring member 5. It is electrically connected to the substrate 3 via the substrate 3.

According to the present invention, the lead wire 8 is covered with a closed-cell foamed rubber elastic body 10 having a smaller spring constant than the spring member 5 supporting the current collecting element 4, as shown in FIG.

In the illustrated example, the foamed rubber elastic body 10 is provided only in the lead wire buried portion, but this is because the current collecting element 4 and the spring member 5
The foamed rubber elastic body 1 may be arranged so as to fill the entire internal space defined by the foamed rubber elastic body 1 and the substrate 3.
0 also serves as a sound absorbing and vibration damping member.

The foamed rubber elastic body 10 is formed by filling the surrounding area of the lead wire 8 with a two-component room-temperature-curing foamable silicone rubber compound by a conventional method and then foaming it. Common wire 11 that electrically connects the elements 4
can also be encapsulated by the foamed rubber elastic body 10.

The foamed rubber elastic body 10 is preferably made of a flame-retardant material such as silicone rubber to prevent burnout due to spark discharge.

In addition, in the 3 internal spaces defined by the current collecting element 4, the spring member 5, and the substrate 3 of the current collecting unit 1, there is provided a method of applying the present invention to Japanese Patent Application No. 52-122-854 (Japanese Unexamined Patent Publication No. 54-64308) proposed by the present applicant. A descending position limiting member of a foamed rubber elastic body as disclosed in the invention of Japanese Utility Model Application No. 139476/1983 (Japanese Utility Model Application No.
It is also possible to separately attach a vibration damping member etc. (none of which are shown) as disclosed in the invention of Publication No. 5-56401), and in this case, the foamed rubber encasing the lead wire 8 according to the present invention may be attached separately. The elastic body 10 is required to have a spring constant equal to or smaller than the spring constant of the lowering position limiting member, vibration damping member, etc., and smaller than the spring constant of the spring member 5 of the current collector 1.

As described above, the current collecting rubber slider according to the present invention includes a current collecting part that supports current collecting elements made of a plurality of conductive metals arranged in parallel with each other with a spring member made of a rubber elastic body; a load supporting section that is independent of the current collecting section and is made of a sliding plate made of an easily slippery and highly abrasion resistant material supported by a spring member having a spring constant that is much larger than the spring constant of the current collecting section; By having a structure in which the slider is mounted on the same board, most of the load when the slider is pressed against the power supply line is borne by the load supporting part, and the current collecting part is always connected to the power supply line in order to collect current from the power supply line. Since it is only necessary to provide an extremely low spring constant that is sufficient to make contact with the electric wire, the slider device itself is prevented from separating from the power supply line, and the wear of the current collecting part and the sliding noise level are significantly reduced. In addition, the lead wire, which is a component of the current collecting section, is covered with a closed-cell foamed rubber elastic body having a smaller spring constant than the spring member, thereby reducing the current collecting section. Without diminishing the advantages of making it a spring constant,
A complete protection effect for rust prevention and waterproofing of the lead wire can be achieved.

[Brief explanation of drawings]

FIG. 1 is a side view of the current collecting rubber slider according to the present invention, and FIG. 2 is a sectional view taken along the line A--A in FIG. 1... Current collector part, 2... Load support part, 3
...Substrate, 4...Current collecting element, 5...
...Spring member, 6...Sliding plate, 7...
Spring member, 8... Lead wire, 9... Mounting plate, 10... Foamed rubber elastic body, 11...
...Common line.

Claims (1)

[Scope of utility model registration request] a current collecting unit that supports current collecting elements made of a plurality of conductive metals arranged in parallel with each other with a spring member made of a rubber elastic body;
a load supporting section that is independent of the current collecting section and is made of a sliding plate made of a slippery and highly abrasion resistant material supported by a spring member having a spring constant that is much larger than the spring constant of the current collecting section; In the current collecting rubber slider, the lead wire electrically connecting each current collecting element to the board is made of a closed-cell rubber slider having a spring constant smaller than that of the spring member of the current collecting part. A rubber slider for current collection that is covered with a foamed rubber elastic body.