JPH051012U - Control cable liner - Google Patents

Abstract

(57) [Abstract] [Purpose] The liner to be inserted into the inner hole of the outer casing that constitutes the control cable has improved its properties to improve the slidability of the inner cable that slides through the inner hole, and The wear resistance of the liner itself is improved to improve the operation efficiency and durability of the control cable. [Structure] The material of the liner is 90% thermoplastic synthetic resin
~ 97%, ultra high molecular weight polyethylene resin (molecular weight 200
About 3% to 10% of the powder is mixed by coloring etc. and molded into a tube with an extruder to form a liner.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention is a control provided for remote control in various vehicles and agricultural machines. Regarding the cable, the present invention relates to a liner inserted into the inner hole of the outer casing.

[0002]

[Prior art]

  The control cable provided for remote control is a synthetic resin pipe or metal. Inside the inner hole of the flexible outer casing with a spiral tube coated with synthetic resin, metal twist A flexible inner cable made of wire or the like is slidably inserted.   However, the inner cable that passes through the inner hole of the outer casing is When sliding the inner hole of the outer casing when operating the roll cable, a friction resistance As a result, the operation loss occurs between the operating part and the operated part, and the operating efficiency is reduced The operating force applied to is not sufficiently transmitted to the operated part.

[0003]   In order to eliminate this problem, a small diameter synthetic resin with good lubricity and wear resistance is used. Insert the tube of as a liner into the inner hole of the outer casing, and Insert the inner cable through the hole to reduce frictional resistance as the inner cable moves. Improve the control cable operation efficiency.

[0004]

【problem】

  Conventionally, synthetic resin liners have been made of fluorine, polyethylene, polyamide, and polyacetate. Resin such as tar and polyester is used as the material. Fluorine resin, Polyene Although the ethylene resin has good lubricity, it is inferior in wear resistance due to its softness and wear damage. There is an early drawback. Polyacetal resin, polyamide resin, polyester resin, etc. Has good wear resistance but poor lubricity. It causes ic slip and makes the operation efficiency of the control cable unstable. .

[0005]

[Problems to be solved by the device]

  As mentioned above, conventional synthetic resin liners have excellent lubricity and wear resistance. Inferior in wear, the liner breaks and the control cable is damaged more quickly. Also resistant A liner with excellent wear resistance and good durability is not suitable for lubricity and operation efficiency is desired. It does not improve. In addition, the inner cable may become unstable due to stick slips, etc. Only operation efficiency can be obtained.

[0006]

[Means for Solving the Problems]

  The present invention improves the lubricity and wear resistance of the liner and controls the control cable. 70% to 97% thermoplastic synthetic resin pellets to improve workability and durability, Ultra high molecular weight polyethylene resin powder 30% to 3% is mixed, and the extruder is used to The tube is formed into a liner having good wear resistance and lubricity.

[0007]

【Example】

  The control cable (1) is a metal spiral tube (21) as shown in FIG. A flexible synthetic resin coating (22) is applied to the outer circumference of the inner wall of the metal spiral tube (21). The outer casing (2) with the synthetic resin liner (23) inserted in the The casing caps (24), (24) are attached to the terminal, and the liner (23) An inner cable (3) made of flexible steel stranded wire is slidably inserted through the hole, Secure the inner ends (31) and (31) to both ends of the inner cable (3). There is.

[0008]   Made of synthetic resin to be inserted into the inner hole of the metal spiral tube (21) of the outer casing (2) The liner (23) is an inner cave which is inserted through the inner hole of the liner (23). (3) facilitates its movement by making it slippery when sliding Operates the control cable (1) more efficiently and operates with less loss of operating force The equipment can be operated.

[0009]   However, the liner (23) made of fluorine resin or polyethylene resin is The bull (3) slides easily with less frictional resistance, but has poor wear resistance and wear. The rubbed part is immediately worn and broken, and the control cable (1) is damaged. In addition, wear resistant and durable polyacetal, polyamide, polyester, etc. The one made of resin is inferior in lubricity, or causes a stick slip to cause friction resistance. The resistance is increased, the sliding property of the inner cable (3) is deteriorated, and the control cable ( The operability of 1) is reduced.

[0010]   For this purpose, mix liner (23) with fluffy resin powder or solid lubricant, Some lubricants are mixed, but the effect of improving lubricity has not been obtained so much.   The liner (23) of the present invention is made of thermoplastic synthetic resin pellets of 70% to 97%. , 30% to 3% of ultra high molecular weight polyethylene resin powder with a molecular weight of about 2 million is colored Sprinkle with a ring or other means to mix and extrude this into a thin tube with an extruder. It was produced by   Ultra high molecular weight polyethylene resin has the same frictional resistance as polyethylene resin. Very low hardness and extremely high abrasion resistance. For this reason, 3% to other synthetic resins A product that can sufficiently compensate for the defects of the basic synthetic resin only by mixing 30% Is.   Ultra high molecular weight polyethylene resin, high density polyethylene (molecular weight about 30,000), poly Mixing with amide, polyacetal, polyester resins is 3% to 30% It is possible up to about%.

[0011]   The liner (23) of the present invention can be used for a normal control cable operation efficiency test. Therefore, the following results were obtained.

【sample】

[0012]             Control cable configuration               Outer casing outer diameter φ10 mm                                 Length 1000mm               Outer diameter of liner φ4.8mm                                 Inner diameter φ 3.8 mm               Inner casing outer diameter φ3mm                                 Length 1500mm

[Test conditions] Cable installation

[Installation drawing]

[0013]

[Operating efficiency calculation formula]

[Equation 1]

[0014]

【Test results】

[Table 1]

[0015]

[0016]

【effect】

  For this purpose, by mixing 3% to 30% of ultra high molecular weight polyethylene resin, Lubrication by compensating for the drawbacks of each resin without losing the effective advantages of thermoplastic synthetic resins A durable and durable liner that extends the life of the control cable .

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a control cable of the present invention.

[Explanation of symbols]

1 control cable 2 Outer casing 21 Metal spiral tube 22 coating 23 Liner 3 Inner cable

Claims (5)

[Scope of utility model registration request] 1. A remote control, wherein a liner (23) is inserted into an inner hole of an outer casing (2) and an inner cable (3) is slidably inserted through the inner hole of the liner (23). In the control cable (1), the liner (23) is made of thermoplastic synthetic resin pellets 70% to 9%.
A liner for a control cable (1), characterized by mixing 30% to 3% of powder of ultra-high molecular weight polyethylene resin (molecular weight of about 2,000,000) with 7% and forming it into a thin tube by an extruder. (23). 2. The utility model registration claim in which the thermoplastic synthetic resin is high-density polyethylene (molecular weight of about 30,000),
The liner (23) of claim 1. 3. The liner (2) according to claim 1, wherein the thermoplastic synthetic resin is a polyamide resin.
3). 4. The liner (23) according to claim 1, wherein the thermoplastic synthetic resin is a polyacetal resin. 5. The liner (23) according to claim 1, wherein the thermoplastic synthetic resin is a polyester resin.