JPS60131315A - Window regulator for automobile - Google Patents

Abstract

PURPOSE:To aim at reduction in wear and fatigue in a wire and improvements in durability, by constituting the wire so as to impregnate a lubricant into a circumferential surface of a gang of plural strands and inside a space between each strand, in case of the above captioned regulator being of wire drum in type. CONSTITUTION:A lubricant 62 made up of adding 1-5% fine powder of molybdenum oxide or the like to oils and fats such as mineral oil, animal and plant oils, etc., being in consistency-form is thoroughly impregnated into space between each wire circumferential surface and each wire 61 of a strand consisting of these plural wires 61 and then formed into a solid wire 6, while a nylon coat is applied to a surface of this wire 6. With this constitution, wear and fatigue due to abrasion inside the wire are relieved to the smallest possible extent, thus durability is well improvable.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wire drum type window regulator for automobiles.

As shown in Fig. 1, a slider 3 is attached to the lower end of a window glass 2 which is installed in the inner cavity 1 of an automatic door so that it can be raised and lowered. The slider 3 is slidably fitted on a working guide rail 4 provided in the guide rail 4 so as to match the glass lifting locus. The upper and lower ends are connected to upper and lower pulleys, 102. ,,． 11 and inserted into the upper and lower A, Utachufu 5αgsb, and its tip 6α
, 64 are wound around and fixed to a drum 9 which is rotatably attached to the base plate 7, and the operation handle 8 is rotated by rotating the drum 9 by an electric motor or the like, so that one end of the wire 6 is rotated. A so-called wire drum type window regulator has been developed in which the wire 6 is wound around the drum 9 and at the same time the other end is unwound from the drum 9 to move the wire 6 in the longitudinal direction to raise and lower the window glass 2 via the slider 3. , has already come into general use.

In FIG. 1, reference numerals 12 and 13 denote compression coil springs, which are interposed between the tips of the outer tubes 5α and 5h and the base plate 7 to remove slack in the wire 6 and maintain a predetermined tension.

In the above-mentioned window regulator, the drum 9 has a spiral groove 91 on its outer peripheral surface as shown in FIG.
are formed, and holes 92 and 93 for wire mooring are formed, and both end portions 6α and 6h of the wire 60 are wound around the upper and lower parts of the groove 91 of the drum 9, and then Wire end 6 fixed to wire 6 end as shown
It is common practice to adopt a structure in which the wire locking holes 92 and 93 are engaged with each other.

Generally, stranded steel wire is used as the wire 6, but in order to reduce the bending fatigue of the wire, it is effective to use a stranded wire twisted with a thin wire diameter. The thinner the wire, the greater the influence of contact wear and internal wear, and the faster the wire breaks and the greater the elongation. In addition, by increasing the diameter of the strands and reducing the number of twists, it is possible to reduce the effects of wear fatigue and elongation as described above, but the wire is susceptible to bending fatigue and must be used with strong bending. It is not possible to use wires with such a large diameter.

On the other hand, in the wire drum type window regulator as described above, the drum 9 is used for glass stroke and safety measures.
In the case of manual operation, it is not possible to use a large diameter one due to the installation space, the number of rotations of the operating handle, the operating force, etc., and the diameter has to be small, so it is wound around a small diameter drum 9. The wire 6 that is wound up and unwound 9 causes great bending fatigue at the bent portion, and also
Contact wear due to contact with the strands and internal wear due to mutual friction between the stranded wires occur, and when these fatigues combine, the bent portions of the wire are likely to break, and the wire must be replaced frequently. have.

In order to reduce the frictional fatigue of the wire bends as described above, it is effective to supply lubricating oil to the part of the wire that is wound around the drum, but the drum part that should be lubricated is the inside of the door. 1, so in order to refuel, the lining of the door must be removed, making it extremely difficult to replenish lubricating oil.

Therefore, in the present invention, by using a wire pre-impregnated with a lubricant such as granite oil on the outer peripheral surface of a plurality of steel cable lines and in the nitrogen gap formed between each steel cable line, there is no need to lubricate. The wire maintains a state in which wear fatigue such as contact wear and internal wear is significantly reduced over a long period of time, thereby significantly improving the durability of the wire.

That is, in the present invention, as shown in FIG. 4, a wire 6 is used in which the outer peripheral surface of each strand of a stranded wire consisting of a plurality of strands 61 and the spaces between each strand are entirely impregnated with a lubricant 62. It is something.

The lubricant 62 is highly viscous mineral oil.

Animal and vegetable oils 1 Synthetic resin oils and semi-solid greases, or high melting point paraffin, pitch, asphalt, etc. that are solid at room temperature, singly or in combination, are used, and molybdenum disulfide is added as a solid lubricant to the above oils and fats. It is more effective to add 1 to 5% of fine powder such as , graphite, mica-1 special clay, etc.

Further, by applying a nylon coating to the surface of a wire constructed by impregnating a lubricant between the strands, it is possible to prevent the internal lubricant from flowing out and further improve durability.

The method of impregnating the wire 6 with the lubricant 62 is as follows: When winding the wire 61 onto a winding drum that is a twisted wire coming out of the voice during the wire twisting process, or when rewinding the wire from the winding drum to a measuring drum. Depending on the properties of the lubricant, any method can be used, such as dropping or spraying the lubricant as it is or heating and melting it at a high temperature to improve fluidity, or by penetrating the twisted wire into the molten layer of the lubricant. Can be adopted.

The number of wire breakages at the drum part between the wire drum type window regulator of the present invention using a wire impregnated with a lubricant as described above and the conventional wire drum type window regulator using a wire not impregnated with a lubricant. The test results are shown in the table below.

The test conditions were a winding speed of 51 times/unwinding to the drum.
(Stroke 400mmL Drum diameter) As is clear from the above test results, the wire of the conventional wire breaks after about 5000 windings, whereas the wire of the present invention breaks after about 300,000 windings. It can withstand unwinding and rewinding operations, significantly improving the durability of the window regulator without any maintenance, and can bring about great practical effects.

It goes without saying that the present invention is not only applicable to all kinds of stranded wires other than the stranded wire shown in the fourth figure, but also to wires made by simply bundling multiple strands without twisting them. .

[Brief explanation of drawings]

Fig. 1 is a front explanatory view of a wire drum type window regulator to which the present invention is applied, Fig. 2 is a side view of the drum shown in Fig. 1, and Fig. 3 is a partial explanatory view showing one end of the wire shown in Fig. 1. , FIG. 4 is a sectional view of a wire, showing one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Door inner cavity, 2...Window glass, 3...Slider, 4...Guide rail 11.6...Wire, 6
1... Element wire, 62... Lubricant, 7... Base plate, 9... Drum. Above 11 Mouth 10 Kei 2 Tujo 3 Senkei 4 Close

Claims (2)

[Claims] (1) A wire is stretched along the opening/closing locus of the window glass, the window glass is connected to the wire, both ends of the wire are wound around the outer periphery of a drum, and the drum is rotated. In a wire drum type window regulator in which one end of the wire is wound around the drum and the other end of the wire is unwound at the same time to open and close the window glass, the wire is connected to each of the outer circumferential surfaces of the plurality of wires and to each other. A window regulator for an automobile, characterized by having a structure in which a lubricant such as lubricating oil is impregnated into the gaps formed between the wires. (2) The automotive window regulator according to claim 1, wherein the wire is composed of a twisted wire made of a plurality of twisted wires.