JP2019211053A - Operation wire - Google Patents

Abstract

An operation wire that can be used in a routing route that requires a small bending radius and that can suppress a decrease in feeling during operation is realized.
A wire includes a plurality of strands and a resin layer covering the outer periphery of the wire, and the resin layer includes a hard partition and a soft partition that are partitioned in a circumferential direction. A plurality of hard partition portions and soft partition portions are provided in the circumferential direction, and the soft partition portions are disposed between adjacent hard partition portions.
[Selection] Figure 1

Description

  The present invention relates to an operation wire.

  For the operation wire, for example, a single-strand or double-strand structure such as a cable in which a core wire and a plurality of strands are twisted around the core wire is used.

  Such an operation wire is routed depending on the application, and may be routed in a state where a small bending radius is required. The operation wire requires a small bending radius. For example, an operation wire in which a side wire is covered with a synthetic resin layer on the outer periphery of the wire (inner wire) is used in order to achieve both durability and buckling strength. (For example, Patent Document 1).

JP-A-9-88934

  However, the operation wire whose outer periphery is covered with the synthetic resin layer is transmitted as the load necessary for the movement of the wire after the load applied to the wire by the operation is used for contraction of the synthetic resin layer. The timing at which the initial load is transmitted to the operation target is delayed. An operation wire whose outer periphery is covered with a synthetic resin layer has a reduced feeling during operation.

  In order to suppress such a decrease in feeling during operation, when a hard synthetic resin is used for the synthetic resin layer covering the side wires, it is difficult to use it for a routing route that requires a small bending radius. Become.

  An object of the present invention is to provide an operation wire that can be used for a routing route that requires a small bending radius and that can suppress a decrease in feeling during operation.

The operating wire of the present invention is
A wire composed of a plurality of strands, and a resin layer covering the outer periphery of the wire,
The resin layer has a hard partition portion and a soft partition portion divided in a circumferential direction.

  ADVANTAGE OF THE INVENTION According to this invention, it can use for the routing route which needs a small bending radius, and can suppress the fall of the feeling at the time of operation.

It is a principal part perspective view of the operation wire which concerns on embodiment of this invention. It is sectional drawing of the wire for operation which concerns on embodiment of this invention. It is sectional drawing of the control cable which used the wire for operation as an inner cable. It is sectional drawing of the modification of the wire for operation. It is sectional drawing of another modification of the wire for operation.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<Outline of operation wire 1>
The operation wire 1 shown in FIGS. 1 and 2 is used as, for example, a cable routed between an operation target and an operation unit. The operation wire 1 transmits the operation force of the operation unit from the operation unit to the operation target side. The operation wire 1 is for operating an operation target by being pushed and pulled by an operation of an operation unit. The operation wire 1 has rigidity and flexibility that can withstand an operation when being pushed and pulled.

  In the present embodiment, the control wire 8 is routed between a shift lever of a shift lever device in an automobile as an example of an operation unit and a transmission as an example of an operation target (see FIG. 3). Applicable to inner cable. Note that neither the operation unit nor the operation target is limited to the above example. For example, the control cable 8 can be applied to a parking brake system. In this case, the control cable 8 is routed between a brake shoe and a side brake lever, for example.

  The control cable 8 has an outer casing 9 (see FIG. 3) and an operation wire 1 disposed as an inner cable in the outer casing 9.

  The operation wire 1 connects the operation unit and the operation target and slides in the outer casing 9 (see FIG. 3), thereby transmitting the operation force of the operation unit to the operation target.

  An operation wire 1 shown in FIG. 1 includes a wire 3 composed of a plurality of strands 2 and a resin layer 4 covering the outer periphery of the wire 3.

<Wire 3>
In the present embodiment, the wire 3 has a function of ensuring the rigidity of the inner cable, and is formed by twisting a plurality of strands 2. The number of the plurality of strands 2 is appropriately set in the use of the operation wire 1. In the wire 3, a plurality of adjacent strands 2 are in close contact with each other. In the present embodiment, the wire 3 is formed by twisting a plurality of strands 2 in a spiral shape (so-called single twist).

  The strand 2 has desired rigidity and flexibility depending on the purpose, and may be a metal strand such as a hard steel wire or a stainless steel wire. The plurality of strands 2 may not have the same thickness. The element wire 2 may be a single wire. For example, the strand 2 may be formed by twisting multiple strands, that is, a plurality of thinner strands. In the present embodiment, the wire 3 is formed by single twisting, so that the wire 3 has rigidity although it is less flexible than the case of a double twisted wire.

  The wire 3 of the present embodiment does not have a strand that becomes a thick core wire having a diameter larger than that of the other strands in the plurality of strands 2, and is different from a thick core type core material.

<Resin layer 4>
The resin layer 4 covers the outer periphery of the wire 3 as a core material, and the resin layer 4 includes a hard partition portion 5 and a soft partition portion 6 that are partitioned in the circumferential direction.

The resin layer 4 is formed using a synthetic resin such as a thermoplastic resin such as polyethylene, polyacetal, polyamide, fluororesin, polyester, or an elastomer thereof, or a mixture thereof. In the present embodiment, the resin layer 4 is formed by extruding a thermoplastic resin into a tubular shape on the surface of the wire 3.
The hard partition portion 5 and the soft partition portion 6 are portions that are relatively different in hardness, and the soft partition portion 6 is a portion that is softer than the hard partition portion 5 and is more elastic than the hard partition portion 5. It is a site | part which has.

  In the present embodiment, the resin layer 4 has a hard member and a soft member made of materials having different hardnesses, the hard partition portion 5 is formed of a hard member, and the soft partition portion 6 is a soft member. It is formed by.

  The hard member has an inner portion 7 and an outer portion extending radially outward from the inner portion 7 and provided as the hard partition portion 5. The inner portion 7 and the hard partition portion 5 are hard layer portions. As a single unit.

The inner portion 7 is a cylindrical layer that covers the periphery of the wire 3 and is integrally formed as an outer portion and a hard layer portion provided as the hard partition portion 5 in the present embodiment. In the present embodiment, the hard partition portion 5 that is the outer portion is provided so as to protrude in the radial direction from the outer periphery of the cylindrical inner portion 7.
For example, polyamide may be used as the material of the hard member constituting the inner portion 7 and the hard partition portion 5.

  In the present embodiment, the soft partition portion 6 is disposed in the circumferential direction along with the hard partition portion 5 on the radially outer side of the inner portion 7.

The material of the soft member as the soft partition part 6 should just have elasticity rather than the hard partition part 5, for example, uses an elastomer etc. so that it may have elasticity rather than the polyamide used for the hard partition part 5. Also good.
The soft partition portion 6 is disposed outside the inner portion 7 formed of the hard member and between the hard partition portions 5 that are adjacent outer portions.

In the present embodiment, the outer peripheral portion 6 a that forms the outer peripheral surface of the operation wire 1 together with the arc-shaped outer peripheral portion 5 a of the hard partition portion 5 in the soft partition portion 6 is more than the outer peripheral portion 5 a of the hard partition portion 5. Recessed radially inward. The soft partition part 6 is a curved concave outer peripheral part 6a.
The concave outer peripheral part 6 a of the soft partition part 6 may be formed by a contraction difference from the material of the hard member having the hard partition part 5. For example, when extruding the outer periphery of the wire 3 using a hard member and a soft member in which the hard partition portion 5 and the soft partition portion 6 are made of a thermoplastic resin as the resin layer 4, the outer peripheral portion 6a of the soft partition portion 6 is formed. You may form in a concave shape, without requiring the process processed into a concave shape.

  The hard partition portion 5 and the soft partition portion 6 may be provided so as to extend along the axial direction of the operation wire 1.

  In the present embodiment, a plurality of hard partition portions 5 and soft partition portions 6 are provided in the circumferential direction in the operation wire 1, and the soft partition portions 6 are disposed between adjacent hard partition portions 5. ing.

  For example, each of the hard partition portion 5 and the soft partition portion 6 may be formed to extend spirally around the axis of the operation wire 1, and the operation wire 1 is provided on the outer peripheral surface of the operation wire 1. It may be provided linearly in the extending direction.

<Control cable 8>
FIG. 3 is a cross-sectional view of the control cable 8 using the operation wire 1 as an inner cable.

  As shown in FIG. 3, the operation wire 1 is slidably inserted in the outer casing 9 as an inner cable along the extending direction.

Here, the outer casing 9 is a tubular body made of resin, and includes an inner resin layer 91 into which the operation wire 1 is inserted, and a metal layer 92 provided on the outer periphery of the inner resin layer 91. The outer casing 9 further includes a covering material 93 that covers the outer periphery of the metal layer 92.
The inner resin layer 91 is a so-called liner, and may be formed of a thermoplastic resin such as polyethylene, polyacetal, polyamide, fluororesin, polyester, or an elastomer thereof.
The metal layer 92 is an armor layer formed by spirally winding a number of metal wires around the outer periphery of the resin layer. The covering material 93 is a synthetic resin layer that covers the outer periphery of the metal layer 92.
Note that a lubricant G such as grease is interposed between the operation wire 1 and the outer casing 9 to make the operation wire 1 slide smoothly.

For example, the control cable 8 is routed in a bent state with a small radius of curvature. That is, the operation wire 1 in the outer casing 9 is placed in a route that requires a small bending radius.
When the operation wire 1 inserted into the outer casing 9 that is curved as a routing route that requires a small bending radius is pulled toward the operation portion, the operation wire 1 is bent into the inner resin inside the outer casing 9. The force applied to the inner resin layer 91 is moved on the inner side of the inner layer 91a (see FIG. 3). Slide while pressing.
Further, when the operation wire 1 is pushed to the operation target side, the operation wire 1 moves in the direction in which the bending radius increases inside the curved inner resin layer 91 in the outer casing 9, and the inner resin layer The inner peripheral surface 91a (see FIG. 3) 91 may slide while being pressed. At this time, in the operation wire 1, the resin layer 4 having the hard partition portion 5 and the soft partition portion 6 divided in the circumferential direction presses the inner peripheral surface 91 a of the inner resin layer 91, while the inner resin layer The inner peripheral surface of 91 is slid.

  As described above, the operation wire 1 has the soft partition portion 6 formed of the soft member, so that when the operation wire 1 is formed of the hard member alone, that is, compared to the operation wire whose entire outer periphery is configured of the hard member, The bending rigidity can be kept low, and it has flexibility. As a result, even if the cable is routed in a bent state with a small radius of curvature, that is, used for a route that requires a small bend radius, the load applied to the operation wire 1 by the operation is reduced by the resin layer. Since it is transmitted to the operation object without being used for contraction of the resin layer 4 by pressing 4 or the like, it is possible to suppress a decrease in feeling during operation.

  Since the outer peripheral portion 6a of the soft partitioning portion 6 is a curved concave outer peripheral portion 6a that is recessed radially inward from the outer peripheral portion 5a of the hard partitioning portion 5, such as grease in the outer casing 9 (see FIG. 3). Lubricant G accumulates and the lubricant G is hardly cut out.

Moreover, in the operation wire 1, since the hard partition part 5 and the soft partition part 6 are comprised with the material of different hardness in the circumference direction in the resin layer 4 which contacts the outer casing 9, it becomes difficult to transmit a vibration. The soft partition 6 absorbs vibrations and can reduce generation of unnecessary vibrations, so-called chattering noise.
In the operation wire 1, in the hard partition portion 5 and the soft partition portion 6 that are provided in a plurality in the circumferential direction, the soft partition portion 6 may be disposed between the adjacent hard partition portions 5. As shown in the operation wire 1 </ b> A in FIG. 4, the soft partition 6 may be formed of a resin layer and a gap 12.

<Modification>
An operation wire 1A shown in FIG. 4 covers the outer periphery of a wire 3 constituted by a plurality of strands 2 with a resin layer 4A. The resin layer 4A includes a hard partition portion 5A and a soft partition portion 6A that are divided in the circumferential direction. The hard member has an inner portion 7 that covers the outer periphery of the wire 3 and a hard partition portion 5A that extends radially outward from the inner portion 7.
The soft partition 6A is constructed so that a gap 12 is formed between the soft partition 6A and the inner portion 7 between the adjacent hard partitions 5A. As described above, the resin layer 4A covering the outer periphery of the wire 3 has the gap 12 on the radially inner side of the operation wire 1A than the soft partition portion 6A divided in the circumferential direction together with the hard partition portion 5A. The operational effects similar to those of the wire 1 can be obtained, and the soft partition portion 6A is easily bent and becomes the operation wire 1A having more flexibility.

Further, as shown in the operation wire 1B shown in FIG. 5, in the resin layer 4B covering the outer periphery of the wire 3, the hard partition portion 5B and the soft partition portion 6B that are alternately provided around the periphery of the soft partition portion 6B. The circumferential length of the outer circumferential portion 6Ba may be made larger than the circumferential length of the outer circumferential portion 5Ba of the hard partition portion 5B. The operation wire 1B has the same configuration as that of the operation wire 1, and the same components are denoted by the same reference numerals with “B” and description thereof is omitted.
That is, in the operation wire 1, in the resin layer 4 covering the outer periphery of the wire 3, the interval between the hard partition portion 5 and the soft partition portion 6 divided around the periphery, the axial pitch, or the hard partition portion 5. The lengths in the radial direction of the operation wires 1 of 5A, 5B and the soft partition portions 6, 6A, 6B are arbitrary and can be set as appropriate according to the application.

In the present embodiment, the operation wire 1 is manufactured by extrusion so as to cover the resin layer 4 on the wire 3, that is, the resin layer 4 is a resin having two different hardnesses to be a hard member and a soft member. However, the present invention is not limited to this.
For example, a resin is arranged so as to cover the outer periphery of the wire, and a concave portion is formed by irradiation with an electron beam and partially cured, and a resin that becomes a soft member is embedded in the concave portion. Also good.

  Further, the operation wire 1 of the present embodiment may be slidably disposed in the outer casing and applied to a fuel lid or a cable for operation of a seat for in-vehicle use. Further, the operation wire 1 is not limited to the on-vehicle use, and may be applied to a cable used for an application other than the on-vehicle use.

  The embodiment of the present invention has been described above. The above description is an illustration of a preferred embodiment of the present invention, and the scope of the present invention is not limited to this. That is, the description of the configuration of the apparatus and the shape of each part is an example, and it is obvious that various modifications and additions to these examples are possible within the scope of the present invention.

  The operation wire according to the present invention can be used for a routing route that requires a small bending radius, has an effect of suppressing a decrease in feeling during operation, and is useful, for example, as an inner cable of a control cable.

1, 1A, 1B Operation wire 2 Wire 3 Wire 4, 4A, 4B Resin layer 5, 5A, 5B Hard section (outer part)
5a, 6a, 5Ba, 6Ba Outer peripheral part 6, 6A, 6B Soft partition part 7 Inner part 8 Control cable 9 Outer casing 12 Air gap 91 Inner resin layer 91a Inner peripheral surface 92 Metal layer 93 Covering material

Claims (3)

A wire composed of a plurality of strands, and a resin layer covering the outer periphery of the wire,
The resin layer has a hard partition portion and a soft partition portion divided in a circumferential direction,
Operation wire. A plurality of the hard partition portion and the soft partition portion are provided in the circumferential direction, respectively.
The soft section is disposed between adjacent hard sections,
The operation wire according to claim 1. The resin layer has a hard member and a soft member,
The hard member has a cylindrical inner part, and an outer part extending from the inner part toward the radially outer side and provided as the hard partition part,
The operation wire according to claim 1, wherein the soft member is disposed as the soft partition portion outside the inner portion and between the adjacent outer portions.

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