JP3168362U - Control cable and control cable holding structure - Google Patents

Abstract

An object of the present invention is to securely attach a control cable at a gripping portion of a clamp when the control cable is configured to transmit an operating force by slidably inserting an inner cable into an outer casing while being held by the clamp. Grip to. A center lower hook 22 is formed so as to extend in a plate shape from the center of a rib 21c of a horizontal member 21b in the front horizontal direction. Further, a groove 22a having an arc-shaped cross section is formed along the longitudinal direction on the upper surface side of the central lower hook 22, and the resin layer 18 of the control cable 1 disposed along the longitudinal direction of the horizontal member 21b is formed. A portion can be placed in the groove 22a. The center upper hook 23 is disposed such that the lower surface thereof faces the upper surface of the center lower hook 22, and the portion where the resin layer 18 of the control cable 1 placed in the groove 22 a of the center lower hook 22 is formed is the upper side. Demonstrate the ability to suppress [Selection] Figure 3

Description

  The present invention relates to a structure in which an inner cable is slidably inserted into an outer casing and attached to a member to be attached while holding a control cable using a clamp.

  Conventionally, a control cable having a configuration in which an inner cable is slidably inserted into an outer casing is known. In such a control cable, the outer casing covers the outer periphery of a tube formed by closely winding a steel wire in a spiral manner with an outer coat formed by resin extrusion, and a resin liner is provided in the tube. .

  Patent Document 1 discloses that when a control cable as a linear member is held with a clamp while being attached to a member to be attached, the control cable is held between U-shaped portions of the clamp. Yes.

Japanese Patent Laid-Open No. 05-18443 (2nd page, FIG. 6)

  However, in the technique described in Patent Document 1 as described above, the control cable tends to rotate in the U-shaped portion of the clamp, and the control cable tends to shift in the longitudinal direction in the U-shaped portion of the clamp. was there.

  The present invention has been made in view of such problems, and the object of the present invention is to use a clamp with a control cable configured to transmit an operating force by slidably inserting an inner cable into an outer casing. It is an object of the present invention to provide a technique for securely holding a control cable with a holding portion of a clamp when attaching to a member to be attached while holding.

  The control cable according to claim 1, which has been made in order to solve the above problem, is provided by twisting a plurality of strands outside a hollow liner made of resin in a predetermined direction without spacing. The inner strand is slidably inserted into a flexible outer casing in which the outer periphery of the strand is covered with an outer coat formed by resin extrusion, and is gripped by a gripping portion of a resin clamp. A control cable attached to a member to be attached, wherein a resin layer is formed on at least a part of a surface of the outer casing, and a portion of the outer casing on which the resin layer is formed serves as the grip portion of the clamp. It is characterized by being gripped.

  According to the control cable of the present invention configured as described above, the diameter dimension of the outer casing is increased by the amount of the resin layer formed, and the gripping portion of the clamp that grips the portion of the outer casing where the resin layer is formed is provided. The force for gripping the control cable is increased by the bending and the reaction force of the gripping portion.

  This makes it difficult for the control cable held by the holding part of the clamp to rotate or shift in the longitudinal direction. Therefore, when the control cable is attached to the attachment member while being held using the clamp, the control cable can be reliably held by the U-shaped portion of the clamp.

  The control cable according to a second aspect is the control cable according to the first aspect, wherein the resin layer is formed of a material having a friction coefficient larger than that of the outer coat.

  According to the control cable of the present invention configured as described above, the control cable gripped by the clamp gripping portion rotates or shifts in the longitudinal direction as compared with the case where the outer coat is gripped directly by the clamp gripping portion. The control cable can be held more securely by the U-shaped portion of the clamp.

  The control cable according to claim 3 is the control cable according to claim 1 or 2, wherein the resin layer is formed by winding a resin tape material around the surface of the outer casing. It is formed.

  According to the control cable of the present invention configured as described above, since the thickness dimension of the resin layer is set by setting the length dimension of the tape material wound around the surface of the outer casing, it varies among products. Disappears.

  The present invention can also be realized as a control cable holding structure. Specifically, the control cable holding structure according to claim 4 is provided on the attached member while holding the control cable according to any one of claims 1 to 3 using a resin clamp. The clamp has a grip portion for gripping the control cable, and a portion of the control cable where the resin layer is formed is gripped by the grip portion of the clamp.

(A) is a schematic block diagram of the control cable 1 of this embodiment, (b) is the sectional drawing. (A) Front view of the clamp 20, (b) Side view of the clamp 20, (c) Bottom view of the clamp 20 (A) BB sectional view, (b) AA sectional view, (c) Front view of control cable 1 holding structure, (d) Bottom view of control cable 1 holding structure It is explanatory drawing of the evaluation test of the control cable 1 of this embodiment.

Embodiments of the present invention will be described below with reference to the drawings.
[1. Description of holding structure of control cable 1]
The holding structure of the control cable 1 according to the present embodiment holds the control cable 1 having a configuration in which the inner cable 4 is slidably inserted into a flexible outer casing 2 made of resin by using a resin clamp 20. However, it is a structure attached to a to-be-attached member. Note that illustration of the attached member is omitted. Below, the control cable 1 and the clamp 20 are demonstrated in order.

[1.1. Description of the configuration of the control cable 1]
As shown in FIG. 1, in the control cable 1 of the present embodiment, an inner cable 4 is slidably inserted into a flexible outer casing 2, and the inner cable 4 has the length of the routing path. Accordingly, it is formed in an appropriate length. Hereinafter, the inner cable 4 and the outer casing 2 will be described in this order.

[1.1.1. Description of the configuration of the inner cable 4]
The inner cable 4 is formed by twisting a large number of strands such as hard steel wires, stainless steel wires, and oil temper wires. In addition, about the said inner cable 4, you may comprise so that the wire rope which is the structure which twisted many strands, and the coat | cover which coat | covers a wire rope with resin, such as polyethylene, polyacetal, and polyamide.

[1.1.2. Description of configuration of outer casing 2]
The outer casing 2 includes a liner 10, a strand 12 provided outside the liner 10, and an outer coat 14 that covers the strand 12.

  Among these, the liner 10 is formed in a hollow shape and is formed of a resin in order to reduce sliding resistance with the inserted inner cable 4. For example, polytetrafluoroethylene, polybutylene terephthalate, polyethylene, polyamide, Resins such as polyacetal are used.

Further, the strand 12 is formed by twisting a plurality of strands on the outer peripheral surface of the liner 10 without providing an interval in a predetermined direction.
Further, the outer coat 14 is formed by coating the outer periphery of the strand 12 by extrusion molding of resin, and as the resin, polypropylene, polyethylene, polyamide, or the like is used, and in this embodiment, polypropylene is used.

  When the outer coat 14 is formed, the strand 12 is passed through the mold, and molten resin is injected into the mold. The molten resin is injected into the mold from a direction substantially orthogonal to the strand 12, and the molten resin flows along the outer periphery of the strand 12 in the mold to cover the outer periphery of the strand 12.

  In the outer casing 2, the base tape 16 is wound a predetermined number of times to form a resin layer 18 (see FIGS. 3C and 3D). In the present embodiment, a strip made of polyvinyl chloride (PVC) is used as the base tape 16 in accordance with a desired axial separation load and rotational torque.

[1.2. Description of the configuration of the clamp 20]
Next, the clamp 20 for attaching to the attached member while holding the control cable 1 will be described.

  As shown in FIGS. 2 and 3, the clamp 20 is a resin member that is attached to a member to be attached while holding the control cable 1, and is a clamp body 21 that is a plate-like member formed in a T shape. It comprises various hooks 22 to 27 for holding the cable 1, an attachment portion 28 for attaching the clamp 20 to a member to be attached, and the like. In this embodiment, polyacetal is used.

  The clamp body 21 is formed in a substantially T shape in which the center of the other horizontal member 21b is connected to one end (upper end) of the plate-like vertical member 21a. And the rib 21c extended forward is formed in the lower end part of the horizontal member 21b along the longitudinal direction (horizontal direction).

  The center lower hook 22 is formed so as to extend in a plate shape from the center of the rib 21c of the horizontal member 21b to the front horizontal direction. Further, a groove 22a having an arc-shaped cross section is formed along the longitudinal direction on the upper surface side of the central lower hook 22, and the resin layer 18 of the control cable 1 disposed along the longitudinal direction of the horizontal member 21b is formed. The portion can be placed in the groove 22a. In addition, two openings 21d and 21d are formed side by side in the longitudinal direction at a portion of the clamp body 21 that faces the central lower hook 22.

  The center upper hook 23 is formed so as to extend in a protruding shape from the center upper part of the horizontal member 21b to the front horizontal direction. The central upper hook 23 is disposed such that the lower surface thereof faces the upper surface of the central lower hook 22, and the portion where the resin layer 18 of the control cable 1 placed in the groove 22 a of the central lower hook 22 is formed. Demonstrate the function to suppress from the top.

  The left lower hook 24 is formed on the left part of the rib 21c of the horizontal member 21b, and has a shape in which the cross section is substantially C-shaped and the upper part is open. The width of the entrance of the left lower hook 24 is set to be smaller than the outer diameter of the control cable 1. Therefore, the left lower hook 24 is capable of holding and holding the control cable 1 when the control cable 1 arranged along the longitudinal direction of the horizontal member 21b is inserted from above. Further, the tip of the left lower hook 24 extends obliquely upward to the front, making it easy to insert the control cable 1 inside. Further, an opening 21e is formed in a portion of the clamp body 21 that faces the lower left hook 24.

  The right lower hook 25 is formed on the right portion of the rib 21c of the horizontal member 21b, and has a shape in which the cross section is substantially C-shaped and the upper part is opened. The width dimension of the entrance of the right lower hook 25 is set smaller than the outer diameter dimension of the control cable 1. Therefore, when the control cable 1 arranged along the longitudinal direction of the horizontal member 21b is inserted from the upper side, the lower right hook 25 can be gripped by including the control cable 1. Moreover, the front-end | tip of the lower right hook 25 is extended toward the diagonal upper front, and it is easy to insert the control cable 1 inside. An opening 21f is formed in a portion of the clamp body 21 that faces the lower right hook 25.

  The bottom surface of the left lower hook 24 and the bottom surface of the right lower hook 25 are set so as to be positioned below the top surface of the central lower hook 22 where the groove 22a is formed, and the clamp 20 is a longitudinal member of the horizontal member 21b. The control cable 1 arranged along the direction can be gripped in a state of being bent into a substantially square shape by supporting three points (see FIG. 3C).

  The left end upper hook 26 is formed so as to extend in a protruding shape in the horizontal direction from the upper left end of the horizontal member 21b. The left end upper hook 26 functions to hold the control cable 1 placed in the groove 22a of the center lower hook 22 and held by the left lower hook 24 from the upper side at the left end of the horizontal member 21b.

  The right end upper hook 27 is formed so as to protrude in a horizontal direction from the upper right end of the horizontal member 21b. The right end upper hook 27 exhibits a function of being placed in the groove 22a of the center lower hook 22 and suppressing the control cable 1 held by the right lower hook 25 from the upper side at the right end of the horizontal member 21b.

  The attachment portion 28 is formed so as to extend in a protruding shape in the rearward horizontal direction from the lower end portion of the vertical member 21a. The clamp 20 is attached to the attached member by inserting the attachment portion 28 into an insertion hole (not shown) of the attached member.

  The clamp 20 configured as described above can hold the control cable 1 in a state of being bent in a U-shape, and can be attached to the attached member by the attachment portion 28 while holding the control cable 1 to be held.

[2. About Evaluation Test]
Next, an evaluation test performed on the control cable 1 will be described.
First, the specimens used in this evaluation test are PVC tape (width 19 mm, thickness 0.2 mm), PP tape (width 19 mm, thickness 0.08 mm), and PVC tape (width 19 mm, thickness 0.13 mm). . And the said tape is wound around the outer peripheral surface of the outer casing 2 as a base tape, a resin layer is formed, the clamp 20 is attached to the portion where the resin layer of the outer casing 2 is formed, and the clamp 20 is attached to the longitudinal direction of the outer casing 2. The axial detachment load was measured by pulling with a push-pull gauge, and the rotational torque was measured by pulling the clamp 20 with the push-pull gauge in the circumferential direction of the outer casing 2.

  For comparison, the clamp 20 was attached to the outer casing 2 without winding the tape, and the axial separation load and the rotational torque were also measured. The outer diameter of the outer casing 2 is 4 mm.

  In this evaluation test, the axial detachment load and the rotational torque were measured such that the length of the tape wound around the outer casing 2 was equal (35 mm). In addition, since the thickness dimension of each specimen is different, the outer diameter dimension of the outer casing 2 after tape winding is different from each other.

  As a result of the evaluation test, it was confirmed that the PVC tape was excellent with respect to the axial detachment load (see FIG. 4A). Moreover, it was confirmed that the PVC tape is excellent in terms of rotational torque (see FIG. 4B). Moreover, it was confirmed that the larger the thickness dimension is, even for the same PVC tape, with respect to the axial detachment load and the rotational torque (see FIGS. 4 (a) and 4 (b)).

  Also, the number of tape turns can be variously selected to obtain the desired axial separation load and rotational torque. In the present embodiment, based on the above evaluation test, in order to obtain a desired axial separation load and rotational torque, the resin layer is formed using a PVC tape (width 19 mm, thickness 0.2 mm, length 35 mm). Forming. In addition, the outer diameter dimension of the tape winding part (resin layer 18) of the outer casing 2 is about 5 mm.

[3. Effects of the embodiment]
(1) As described above, according to the holding structure of the control cable 1 of the present embodiment, the clamp 20 has a substantially square shape by supporting the control cable 1 arranged along the longitudinal direction of the horizontal member 21b with three points. While gripping in a bent state, the diameter dimension of the outer casing 2 is increased by the amount of the resin layer 18 formed, and the lower central hook 22 of the clamp 20 that grips the portion of the outer casing 2 where the resin layer 18 is formed. The force for gripping the control cable 1 is increased by the bending and reaction force of the central lower hook 22.

  This makes it difficult for the control cable 1 sandwiched and held between the lower central hook 22 and the upper central hook 23 of the clamp 20 to rotate or shift in the longitudinal direction. Therefore, when the control cable 1 is attached to the attachment member while being held using the clamp 20, the control cable 1 can be reliably held using the center lower hook 22 and the center upper hook 23 of the clamp 20.

(2) Further, according to the holding structure of the control cable 1 of the present embodiment, the resin layer 18 is made of polyvinyl chloride, the outer coat 14 is made of polypropylene, and the resin layer 18 has a larger coefficient of friction than the outer coat 14. Since the outer coat 14 is formed of a material, compared to the case where the outer coat 14 is directly gripped by the center lower hook 22 and the center upper hook 23 of the clamp 20,
The control cable 1 sandwiched and held between the lower central hook 22 and the upper central hook 23 of the clamp 20 is less likely to rotate or shift in the longitudinal direction. It can hold | maintain more reliably using the hook 23. FIG.

  (3) Further, according to the holding structure of the control cable 1 of the present embodiment, the base tape 16 that is a polyvinyl chloride strip is wound around the outer casing 2 a predetermined number of times to form the resin layer 18. Therefore, the thickness dimension of the resin layer 18 is set by setting the length dimension of the base tape 16 wound around the surface of the outer casing 2, and the variation among products is eliminated.

[4. Other Embodiments]
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, It is possible to implement in the following various aspects.

  (1) In the above-described embodiment, the clamp 20 holds the control cable 1 arranged along the longitudinal direction of the horizontal member 21b in a state of being bent into a generally U shape by three-point support. The control cable 1 may be gripped using the center lower hook 22 and the center upper hook 23.

  Even if comprised in this way, the diameter dimension of the outer casing 2 will become large by the part which the resin layer 18 was formed, and the center lower hook 22 of the clamp 20 which hold | grips the part in which the resin layer 18 of the outer casing 2 is formed becomes. There is an effect that the force for gripping the control cable 1 is increased by the bending and reaction force of the central lower hook 22.

DESCRIPTION OF SYMBOLS 1 ... Control cable, 2 ... Outer casing, 4 ... Inner cable, 10 ... Liner, 12 ... Strand, 14 ... Outer coat, 16 ... Undercoat tape, 18 ... Resin layer, 20 ... Clamp, 21 ... Clamp body, 21a ... Vertical member 21b ... Horizontal member, 21c ... Rib, 21d, 21f, 21g ... Opening, 22 ... Center lower hook, 23 ... Center upper hook, 24 ... Left lower hook, 25 ... Right lower hook, 26 ... Left end upper hook, 27 ... Upper right hook, 28 ... Mounting part

Claims (4)

The outer periphery of a strand formed by twisting a plurality of strands on the outside of a hollow liner made of resin without spacing in a predetermined direction can be covered with an outer coat formed by resin extrusion. A control cable having a configuration in which an inner cable is slidably inserted into an outer casing having flexibility, and is gripped by a gripping portion of a resin clamp and attached to a mounted member,
A control cable, wherein a resin layer is formed on at least a part of a surface of the outer casing, and a portion of the outer casing where the resin layer is formed is held by the holding portion of the clamp. The control cable according to claim 1,
The control cable, wherein the resin layer is formed of a material having a friction coefficient larger than that of the outer coat. In the control cable according to claim 1 or 2,
The resin layer is formed by winding a resin tape material around a surface of the outer casing. The control cable according to any one of claims 1 to 3, wherein the control cable is attached to a member to be attached while being held using a resin clamp,
The clamp includes a grip portion for gripping the control cable,
The control cable holding structure, wherein a portion of the control cable where the resin layer is formed is held by the holding portion of the clamp.

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