JP2019086112A - Method of manufacturing control cable and outer casing - Google Patents

Abstract

To provide one example of a control cable or outer cable which can be made lightweight.SOLUTION: An outer casing 5 comprises a resin-made bridge part 12 which has a coating part 11 and a liner 7 integrated so as to connect the coating part 11 and the liner 7 together. Consequently, the number of metallic strands 9 can be decreased while necessary strength is secured. Therefore, the provider can obtain the outer cable 5 which can be made lightweight. Further, the control cable is prevented from becoming too large in flexural rigidity. Therefore, the control cable is improved in workability in routing in a vehicle etc.SELECTED DRAWING: Figure 2

Description

  The present application relates to a control cable, a method of manufacturing an outer casing used for the control cable, and the like.

  For example, in the outer casing described in Patent Document 1, metallic strands (reinforcing lines) and resin strands (reinforcing lines) are alternately arranged on the outer peripheral surface of the liner.

JP 2002-39152 A

  The present application discloses an example of a control cable or an outer casing which can be reduced in weight with a configuration different from that of Patent Document 1, and an example of a method of manufacturing the outer casing.

  The outer casing of the control cable is a resin bridge portion (12) integrated with the coating portion (11) and the liner (7) so as to connect the coating portion (11) and the liner (7) , A bridge (12) extending parallel to the strand (9) along the strand (9).

  Since the covering portion (11) and the liner (7) are connected via the bridging portion (12), the person providing the outer casing or the control cable can make the metal strand (9) while securing the necessary strength. Can reduce the number of As a result, the provider can obtain a control cable or an outer casing which can be reduced in weight.

  In the invention described in Patent Document 1, the covering portion is made of a resin having a melting point lower than that of the resin-made strands, and the compatibility between the covering portion and the resin-made strands is low. It is not connected integrally with the made strand.

  In the method of manufacturing the outer casing, a cord-like body (13) made of a resin having a melting point equal to or lower than the melting point of the resin constituting the covering portion (11), and a plurality of strands Providing an arranging step of arranging (9) on the outer peripheral surface of the liner (7), and a coating generation step of supplying a molten resin around the workpiece for which the arranging step is completed to generate a covering portion (11) Is desirable.

  Thereby, in the coating formation step, the temperature of the cord-like body (13) is raised by the molten resin constituting the coating portion (11), so that the cord-like body (13) is the coating portion (11) The bridge portion (12) is formed integrally with (7).

  At this time, the cord-like body (13) and the liner (7) are either mutually compatible and integrated or, as in the insert molding method, both integrated without being compatible with each other. May be Furthermore, the presence or absence of the interface is not critical. The relationship between the cord (13) and the covering portion (11) is the same as that of the cord (13) and the liner (7).

  Incidentally, the reference numerals in each of the above parentheses are an example showing the correspondence with the specific configuration and the like described in the embodiments described later, and the present invention is limited to the specific configuration and the like shown in the reference numerals in the above parentheses. It is not a thing.

It is a figure showing control cable 1 concerning an embodiment. It is a figure showing the outer casing concerning an embodiment. It is a partially expanded view of FIG. It is a figure showing control cable 1 concerning an embodiment. It is process drawing which shows the manufacturing process of the outer casing which concerns on embodiment. It is a figure showing the work after the end of the arrangement process concerning an embodiment.

  The following "embodiments of the invention" show an example of an embodiment within the technical scope of the present invention. That is, the invention-specifying matters and the like described in the claims are not limited to the specific configuration and the structure and the like described in the following embodiments.

In addition, the arrow etc. which show the direction attached to each figure are described in order to make it easy to understand the relationship between each figure. The present invention is not limited to the directions given in the respective drawings.
At least one member or part described with at least a reference numeral is provided unless otherwise noted. That is, when there is no notice of "one" etc., two or more said members may be provided.

First Embodiment
1. Configuration of Control Cable 1.1 Outline of Control Cable The control cable according to the present embodiment is applied to a control cable for an automobile. As shown in FIG. 1, the control cable 1 includes at least an inner cable 3 and an outer casing 5 and the like.

  The inner cable 3 is a wire rope or a single wire formed by twisting a large number of strands such as hard steel wire, stainless steel wire or oil temper wire. The outer casing 5 is a flexible tube-shaped casing in which the inner cable 3 is accommodated.

1.2 Configuration of Outer Casing The outer casing 5 is configured to have at least a liner 7, a plurality of strands 9, a covering portion 11, and the like.

  The liner 7 is a round tube (cylindrical) member, and the inner cable 3 is slidably inserted therein. The liner 7 is made of a resin such as polytetrafluoroethylene, polybutylene terephthalate, polyethylene, polyamide or polyacetal.

  Each strand 9 is a cord-like member having the same diameter dimension. Each strand 9 is made of metal that is the same as or different from the material that constitutes the strands of the inner cable 3. And each strand 9 is helically wound around the outer peripheral surface of the liner 7 in the state arrange | positioned at equal intervals on the outer peripheral surface of the liner 7 (refer FIG. 1).

  The tension applied to each strand 9 when each strand 9 is wound around the liner 7 is appropriately determined based on the specifications and the like required for the control cable 1. That is, there may be a state where tension is hardly applied or a state where tension above a predetermined level is applied.

  The covering portion 11 is a portion covering the plurality of strands 9 and the liner 7 as shown in FIG. The covering portion 11 is made of a resin such as polypropylene, polyethylene or polyamide (in the present embodiment, polypropylene).

  The covering portion 11 is a round tube (cylindrical) member between a solid line indicating the outermost periphery and a two-dot chain line. And as FIG. 3 shows, the bridge | crosslinking part 12 (rough shaded part of FIG. 3) is provided between the strand 9 adjacent to the strand 7 along the circumferential direction of the liner 7. As shown in FIG.

  The cross-linking portion 12 is a portion made of resin integrated with the covering portion 11 and the liner 7 so as to connect the covering portion 11 and the liner 7. The bridge 12 extends parallel to the strand 9 along the strand 9 (see FIG. 4).

  "The bridge portion 12 is integrated with the cover portion 11 and the liner 7" means (a) a configuration in which the bridge portion 12 is integrated with the cover portion 11 and the liner 7, or (b) insert molding As in the case of the method, the cross-linking portion 12, the covering portion 11, and the liner 7 are integrated without being compatible with each other.

  In the present embodiment, as shown in FIG. 3, since the cross-linked portion 12 and the covering portion 11 are mutually compatible and integrated, an interface hardly exists. Since the bridge portion 12 and the liner 7 are integrated without being compatible with each other, an interface is clearly present.

2. Method of Manufacturing Outer Casing The outer casing 5 is manufactured through at least two steps as shown in FIG. The first step S1 is a placement step. In the arrangement step, as shown in FIG. 6, a plurality of cords 13 and a plurality of strands 9 are alternately arranged on the outer circumferential surface of the liner 7 along the circumferential direction of the liner 7.

  The cord 13 is a cord-like member made of a resin having a melting point equal to or lower than the melting point of the resin constituting the covering portion 11. In the present embodiment, the cord 13 is polypropylene.

That is, in the present embodiment, the relationship between the melting point Mp1 of the liner 7, the melting point Mp2 of the covering portion 11, and the melting point Mp3 of the cord 13 is Mp1 <Mp2 = Mp3.
The coating forming step, which is the second step S2, is a step performed after the end of the disposing step (see FIG. 5). In the coating generation step, the resin in a molten state is supplied around the work (shown in FIG. 6) for which the arrangement step is completed, and the coating portion 11 is generated.

  In addition, the coating | coated part 11 is shape | molded as follows. That is, the work passes through the inside of a substantially cylindrical molding die (not shown). At the time of this passage, the molten resin is injected and injected from the inner peripheral surface of the molding die toward the outer peripheral surface of the work. Then, the resin is cured to form the covering portion 11.

  In the coating generation step, when the molten resin is injected and injected, the temperature of the cord 13 is increased by the molten resin. For this reason, the said cord-like body 13 is integrated with the coating | coated part 11 and the liner 7, and the bridge | crosslinking part 12 (refer FIG. 2) is shape | molded. That is, in the coating generation step, the cord-like body 13 becomes a crosslinked part 12 by integrating the cord-like body 13 with the covering part 11 and the liner 7.

  The cord 13 flows around the strand 9 at the time of the coating generation step. For this reason, the bridging portion 12 integrates the covering portion 11, the liner 7 and the plurality of strands 9, that is, the entire outer casing 5.

3. The outer casing 5 according to the present embodiment and the method of manufacturing the same The outer casing 5 is provided with a resin bridge portion 12 integrated with the coating portion 11 and the liner 7 so as to connect the coating portion 11 and the liner 7. .

  Since the covering portion 11 and the liner 7 are connected via the bridging portion 12, the person providing the outer casing 5 or the control cable 1 can reduce the number of the metallic strands 9 while securing the necessary strength. As a result, the provider can obtain the control cable 1 or the outer casing 5 which can be reduced in weight.

  In the outer casing 5 in which the number of the metallic strands 9 is reduced, that is, the control cable 1, the bending rigidity of the control cable 1 is prevented from being excessively increased. As a result, the routing workability of the control cable 1 to a vehicle or the like is improved.

  In the method of manufacturing the outer casing 5, melting is performed in a state where the cord-like body 13 made of a resin having a melting point equal to or lower than the melting point of the resin constituting the covering portion 11 is disposed. The resin in the state is supplied to generate the covering portion 11.

  Thereby, in the coating generation step, the temperature of the cord-like body 13 is raised by the molten resin constituting the coating portion 11, so the cord-like body 13 is integrated with the coating portion 11 and the liner 7 to form the bridge portion 12. Is molded.

  In addition, you may provide the heating process which heats the cord-like body 13 before implementation of a coating production | generation process. Thereby, since the temperature of the cord-like body 13 reliably rises in the coating step, at least the bridge portion 12 and the coating portion 11 are surely integrated.

(Other embodiments)
The control cable 1 according to the above-described embodiment is for a vehicle. However, the invention disclosed in the present specification is not limited to this. That is, for example, the present invention is also applicable to a window opening / closing device, a two-wheeled vehicle, a agricultural machine, and the like.

  The manufacturing method of the outer casing 5 shown by the above-mentioned embodiment is an illustration, and the invention disclosed by this specification is not limited to this. That is, for example, the outer casing 5 may be one in which the strand 9 is inserted after the covering portion 11, the liner 7, and the crosslinking portion 12 are formed by extrusion molding or pultrusion molding or the like.

  In the embodiment described above, the cross-linked portion 12 and the covering portion 11 are mutually compatible and integrated so that an interface is hardly present, and an interface is clearly present between the cross-linked portion 12 and the liner 7 Was. However, the invention disclosed herein is not limited thereto.

  That is, (a) the cross-linked portion 12 and the liner 7 mutually compatible and integrated so that an interface is hardly present, and an interface is clearly present between the cross-linked portion 12 and the covering portion 11 The configuration or (b) the cross-linking portion 12, the liner 7 and the covering portion 11 may be mutually compatible and integrated so that an interface is hardly present.

In the above-described embodiment, the bridging portion 12 (in the placement step, the cord-like body 13) is helically disposed in parallel to the strand 9. However, the invention disclosed herein is not limited thereto. That is, the bridge portion 12 (cord 13) and the strand 9 may be disposed in parallel with the central axis of the liner 7.

  Furthermore, the present invention is not limited to the above-described embodiment as long as it conforms to the spirit of the invention described in the claims. Therefore, at least two of the plurality of embodiments described above may be combined.

DESCRIPTION OF SYMBOLS 1 ... Control cable 3 ... Inner cable 5 ... Outer casing 7 ... Liner 9 ... Strand 11 ... Coating | covering part 12 ... Bridged part

Claims (3)

A tubular liner made of resin,
An inner cable slidably inserted in the liner;
A plurality of strands of cord metal, the plurality of strands being disposed on the outer circumferential surface of the liner;
A resin coating that covers the plurality of strands;
A resin-made crosslinking portion provided between the strand and the strand and integrated with the covering portion and the liner so as to connect the covering portion and the liner, the strand along the strand And a bridge portion extending in parallel with the control cable. In the outer casing for control cables,
A cylindrical liner into which the inner cable is slidably inserted, the liner being made of resin;
A plurality of strands of cord metal, the plurality of strands being disposed on the outer circumferential surface of the liner;
A resin coating that covers the plurality of strands;
A resin-made crosslinking portion provided between the strand and the strand and integrated with the covering portion and the liner so as to connect the covering portion and the liner, the strand along the strand An outer casing comprising: and a bridge portion extending in parallel with the outer casing. In a method of manufacturing an outer casing having a resin liner, a plurality of strands made of cord-like metal, and a resin covering portion covering the strands,
Cords made of a resin having a melting point at the same temperature as the melting point of the resin constituting the covering portion or a melting point lower than the melting point, and an arranging step of arranging the plurality of strands on the outer peripheral surface of the liner;
And a coating generation step of supplying a molten resin around the workpiece for which the disposing step has been completed to generate the coating portion.

Images