Outer casing for control cable and control cable

A technology for control cables and casings, applied in the field of casings for control cables and control cables, can solve the problems of heavy casings and cannot meet the requirements of light weight, etc., and achieves the effect of improved wiring performance, light weight, easy wiring, and easy manufacturing.

Inactive Publication Date: 2016-04-13
NHK SPRING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, such a case in which flat steel wires are tightly wound into a helical shape is heavy, and cannot meet the demand for weight reduction in the trend of electric vehicles and hybridization.

Method used

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  • Outer casing for control cable and control cable
  • Outer casing for control cable and control cable
  • Outer casing for control cable and control cable

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach -

[0045] figure 1 An example (first embodiment) of the configuration of the casing according to the embodiment of the present invention is briefly shown, figure 2 A cross section perpendicular to the axial direction is briefly shown.

[0046] The casing 10 according to this embodiment includes a resin tubular body 14 having a single-layer resin layer formed in a tubular shape, and two resin layers embedded in the resin tubular body 14 at positions parallel to the axial direction and symmetrical with respect to the axis. The outer diameter D (mm) of the resin tubular body 14 and the distance A (mm) between the two metal wires 18 satisfy the above formulas (1) and (2).

[0047] It should be noted that in the present invention, "the interval A between two metal wires" refers to figure 2 The shortest distance between metal wires when two parallel metal wires are viewed in a cross section perpendicular to the axial direction shown is shown.

[0048] Hereinafter, each constituent...

no. 2 Embodiment approach -

[0071] image 3 Another example of the configuration of the casing according to the embodiment of the present invention (second embodiment) is briefly shown. In the case 20 according to the present embodiment, the resin tubular body 17 has two resin layers 12 and 16, has an outer tubular body (outer resin layer) 16 in which two metal wires 18 are embedded, and is laminated on the outer tubular body. 16 and includes an inner tubular body (inner resin layer) 12 of crystalline resin.

[0072] As in the present embodiment, even when the resin layer of the resin tubular body 17 has a two-layer structure, it may be configured so as to satisfy the above formulas (1) and (2).

[0073] It should be noted that "the difference between the outer diameter and the inner diameter of the resin tubular body" in the case of the present embodiment is the difference between the outer diameter and the inner diameter of the entire resin tubular body, that is, "the outer diameter of the outer tubul...

Embodiment 1

[0134] (Manufacture of single-layer housings incorporating metal wires)

[0135]Resin PP1 pellets were supplied to a crosshead type single-screw extruder (manufactured by Nippon Steel Works Co., Ltd.) with a screw diameter of 30 mm and a length / diameter ratio (L / D)=30 as an extruder. It is extruded into a tubular shape, and at the same time, two hard steel wires are introduced from the rear of the mold to be embedded in the middle part of the wall thickness of the tubular resin tube in a symmetrical position parallel to the longitudinal direction. Thus, a single-layer casing with metal wires was obtained having an outer diameter (D) of 4 mm, an inner diameter (d) of 2 mm, a resin layer thickness (T / 2) of 1 mm, and a distance (A) between metal wires of 2.8 mm.

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Abstract

An outer casing for a control cable (10) has a resin tubular body (14) having a tubular resin layer, and two metal wires (18) embedded in the resin layer of the resin tubular body at locations that are parallel to the axial direction of the resin tubular body and symmetric with respect to an axis. When the outer diameter of the resin tubular body is D (mm) and the interval between the two metal wires is A (mm), formulae (1) and (2) are satisfied. Formula (1): 1.5<=D<=4 Formula (2): 0.5D<=A<=0.7D

Description

technical field [0001] The present invention relates to a housing for a control cable and a control cable used in automobile applications and the like. Background technique [0002] A control cable is usually formed by inserting an inner cable made of metal wires into a flexible tubular casing, and has the function of remotely controlling a passive device at the other end by pressing, pulling, or rotating one end of the inner cable. Control cables are used in various applications such as sunroof opening and closing cables, window opening and closing cables, and parking brake cables, for example, in automobile applications. [0003] For housings for control cables, the dimensional stability in the long-side direction is strictly required. Since the inner cable is a metal wire, it requires a linear expansion coefficient and compression characteristics comparable to those of the metal. [0004] If the thermal expansion of the housing is large, even if the inner cable is not m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C1/26F16C1/10
CPCF16C1/26F16C2202/08F16C1/223F16C2208/66F16C2208/70F16C2208/76F16C1/267
Inventor 北泽明彦铃木亥六草川公一
Owner NHK SPRING CO LTD
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