JPH11335986A - Protective cylinder for control wire for automobile and its formation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protective cylinder for a wire rope to be transmitted by an operation for working functions of automobiles of each part lever, or the like, of trunk opening, bonnet opening, fuel lid opening, throttle, choke, brake, transmission, wind regulator, or the like, to improve a method for forming the cylinder and to prevent a damage by its abrasion. SOLUTION: This protective cylinder 1 for pulling and guiding a wire rope comprises a hollow synthetic resin body 2 and an inner peripheral protective film layer 3 of inner periphery. The inner peripheral protective film layer is obtained by adding a powdery or particular additive 5 such as a synthetic resin, a mineral, an inorganic material, or the like, having compatibility different from that of a base material and low frictional resistance to the interior of a synthetic resin to provide the base material having compatibility with the hollow synthetic resin body and attaching and forming the powder or particles of the additive on an exposed face. An outer peripheral protective film layer is obtained by attaching and forming the powder or the particle on an exposed face in the same way as the inner peripheral protective film layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the operation of various parts of a vehicle, for example, by operating levers of various parts such as a trunk open, a bonnet open, a fuel lid open, a throttle, a choke, a brake, a transmission and a window regulator. The present invention relates to a protective cylinder for a control wire for an automobile and a method for molding the same.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 7, a protective cylinder body for smoothly operating a control wire of this kind for a long period of time pushes an internal control wire by operating a lever or the like of each part. There was a problem that the inner wire rope of the outer peripheral protective cylinder was significantly worn and damaged due to severely pulling, pulling and operating strongly, making it unusable. As shown in FIG. 8, a two-layered protective cylinder made of a synthetic resin having a steel wire or flat steel embedded on the inner surface thereof is provided on the outer periphery of the protective cylinder to prevent damage to the protective cylinder. In some cases, the strength is increased by doing so to prevent damage, abrasion due to contact, and to protect from insulation, etc., but in this case, the weight increases and the outer surface of the inner steel wire or flat steel and the protective cylinder However, there is a problem that the protective cylinder is easily damaged due to abrasion of the joint.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and a main object thereof is to provide an inner peripheral protective film on the inner periphery of a hollow synthetic resin body of a control wire. The inner peripheral protective film layer is formed of a synthetic resin serving as a base material compatible with the hollow synthetic resin body, and a synthetic resin having a low frictional resistance not compatible with the base material inside the base material, a mineral and Additives of inorganic powders and particles are mixed, and the inner wire of the inner rope is rubbed by the pulling action of the inner wire rope due to the formation of the additive of powders or particles that are incompatible with the base material on the inner periphery of the inner protective layer. Is reduced to prevent breakage due to wear. Further, an outer peripheral protective film in which a synthetic resin serving as a base material compatible with the hollow synthetic resin body is mixed on the outer periphery of the protective cylindrical body with the above-described additive having a low frictional resistance which is incompatible with the inside of the base material. By forming a layer and adhering and forming powder and particles of an additive material that is incompatible with the base material of the outer peripheral protective film layer on the outer peripheral surface, abrasion due to contact of each part with the vicinity of the mounting position and the outer peripheral protective film layer. The present invention provides a protective cylinder for a control wire for automobiles and a method for molding the same, which minimizes damage due to frictional injuries.

[0004]

In order to achieve the above-mentioned object, according to the present invention, a protective cylinder for pulling and guiding a control cable is composed of a hollow synthetic resin body and an inner inner protective film layer. . In the inner protective film layer, a synthetic resin serving as a base material and a synthetic resin having low frictional resistance that is not compatible with the base material, a mineral, an additive material of inorganic powder or particles mixed with the base material are mixed. The powder or particles of the additive are formed on the exposed surface on the inner periphery of the inner protective film layer to reduce the resistance of the contact surface. Further, an outer peripheral protective film layer is applied to the outer periphery of the hollow synthetic resin body of the protective cylinder. As described above, the outer peripheral protective film layer is formed by mixing a synthetic resin having a low frictional resistance that is not compatible with the inside of the synthetic resin serving as the base material, a mineral, an inorganic powder, and a powder of the additive,
Particles adhere to the outer peripheral surface of the outer peripheral protective film layer to reduce the resistance of the contact surface. Then, as a method of forming the protective cylinder, the mixed synthetic resin for forming the inner peripheral protective film layer is injected into a first extruder. A hollow synthetic resin compatible with the base material of the inner protective film layer is injected into the second extruder. The first extruder and the second extruder are simultaneously operated, and the melted synthetic resins are integrally joined in a mold die by heat and pressure. Is formed on the exposed surface of the inner peripheral protective film layer and then cut into a predetermined size.

[0005]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a protective cylinder (1) for inserting a wire rope (10) made of metal or the like as shown in FIG. , Such as trunk open, bonnet open, fuel lid open,
A wire rope (10) is inserted into the interior for operating levers and the like of throttles, chokes, brakes, missions, window regulators, and the like, and the wire rope (10) is subjected to friction by a pulling operation of the operation lever (12) and the like. And to prevent damage.

Next, the protective cylinder (1) shown in FIG. 2 comprises an outer hollow synthetic resin body (2) and an inner inner protective film layer (3). The inner peripheral protective film layer (3) is formed of a synthetic resin serving as a base material compatible with the hollow synthetic resin body (2). Into the inside of the synthetic resin, additives (5) and (5) of a synthetic resin, mineral, inorganic powder or particles which are incompatible with the base material and have low frictional resistance are mixed.
In the inner peripheral protective film layer (3), a large number of additive powders and particles are formed on the inner peripheral surface. When the exposed surface of the inner peripheral surface of the inner peripheral protective film layer (3) is cut by the sliding operation of the wire rope (10), the additive material ( 5) The powder or particles of (5) are sequentially exposed.

FIG. 3 is a longitudinal sectional side view taken along the line AA of FIG. 1, in which a wire rope (10) is inserted through a communication hole (11) inside the protective cylinder (1). FIG. 4 is a vertical sectional side view showing the inside of FIG. 1B-B showing the state of use.

Next, in the embodiment shown in FIG. 5, an outer peripheral protective film layer (7) is superposed and laminated on the outer peripheral surface of the protective cylinder (1). The outer peripheral protective film layer (7) includes a synthetic resin serving as a base material compatible with the hollow synthetic resin body (2), a synthetic resin having low frictional resistance, minerals, and minerals incompatible with the base material. Additives such as inorganic powders and particles (5)
(5) A mixed synthetic resin obtained by mixing (5)... Is used, and a number of additive powders and particles are attached to the outer peripheral surface of the outer peripheral protective film layer (7).

The embodiment shown in FIG. 6 explains a method of forming the protective cylinder (1) of the present invention. The first extruder (14) forms the inner peripheral protective film layer (3). It is a constituent material. Additives for powders and particles of synthetic resins, minerals, inorganics, etc., which have a low frictional resistance and are not compatible with the synthetic resin base material which is a base material compatible with the hollow synthetic resin body (2). The mixed synthetic resin obtained by mixing (5) is injected. Next, into the second extruder (15), a synthetic resin of an olefin resin for forming the hollow synthetic resin body (2) of the protective cylinder (1) is injected. Then, the first extruder (14) and the second extruder (15) are operated at the same time, and the molten synthetic resins having compatibility are melted by heat and pressure into a die (16). ) Is made to be integrally polymerized. At this time, the additive materials (5), (5)... Do not flow to the surface of the inner peripheral protective film layer (3) due to a difference in melting point due to heat and pressure, unlike a synthetic resin, but to a certain extent. The powder and particles are extruded while maintaining their original shape, and are formed in an attached state on the exposed surface because they are not compatible with the base material.
Thereafter, the formed protective cylinder (1) is advanced, passes through the cooling water tank (17), and is cut into a predetermined size by a fixed-length cutting machine (19) through a drawer (18).

When the outer peripheral protective film layer (7) provided on the outer periphery of the protective cylinder (1) is formed, the forming order of the protective cylinder (1) is from the inside to the outside. Is formed by extrusion of a third molding machine.

FIGS. 7 and 8 show a conventional protective cylinder (20), (20). The protective cylinder (20) shown in FIG. A wire rope (22) drawn inside the resin body (21) is linearly inserted. In this case, the outer periphery of the hollow synthetic resin body (21) is moved by the movement of the wire rope (22).
Are easily rubbed and worn, and easily damaged. In the conventional example shown in FIG. 8, a steel wire (24) or the like is embedded inside in order to strongly reinforce the outer periphery of the hollow synthetic resin body (21) of the protective cylinder (1) shown in FIG. The outer synthetic resin pipe (23) is covered and toughened. In this case, the production and labor are very involved and complicated, so that it is very expensive. Further, there is also a problem that the inner surface of the steel wire (24) and the outer peripheral portion of the protective cylinder (20) are worn and the protective cylinder is damaged.

Next, as a constituent material used in the present invention, an olefin resin, a styrene resin, a urethane resin, or a nylon resin is used for the hollow synthetic resin body (2).
The inner circumferential protective film layer (3) and the outer circumferential protective film layer (7) are formed of an olefin-based resin, a styrene-based resin, a urethane-based resin as a base material of a synthetic resin compatible with the hollow synthetic resin body (2). , A synthetic resin such as a nylon resin is used, and powders and particles of an additive having a low frictional resistance and a high melting point include synthetic resins such as silicon resin, fluororesin and nylon resin, ores such as molybdenum and mica, and the like. Inorganic substances are used.

[0013]

Since the present invention is constructed as described above, if it is used as a protective cylinder for a wire rope used for various functions for automobiles, the towing movement between the protective cylinder and the internal wire rope is performed. Since the frictional resistance of the contacting portion is small, it can be easily worn or broken due to rubbing, and the operation of the wire rope can be operated extremely lightly and smoothly because of little friction. The hollow synthetic resin used for the protective cylinder and the synthetic resin serving as the base material of the inner protective film layer and the outer protective film layer are compatible with each other because they have compatibility, and the whole is tough. Has the effect of becoming Further, a synthetic resin having a low frictional resistance that is not compatible with the base material, a powder of particles such as minerals and inorganics, and an additive material of particles are added to the inside of the synthetic resin serving as a base material of the inner circumferential protective film layer and the outer circumferential protective film layer. Using the mixed synthetic resin mixed, the powder or particles of the additive material can be easily and reliably adhered to the exposed surface of the inner protective film layer and the outer protective film layer, and contact between the protective cylinder and the inner wire rope can be achieved. This has the effect of reducing surface friction and reducing wear over a long period of time to prevent breakage. Furthermore, when the exposed surface of the inner peripheral surface of the inner peripheral protective film layer is cut off to the inner peripheral surface by sliding of the wire rope, the powder or particles inside are sequentially exposed and adhered to the surface, so that the contact surface of the wire rope is contacted. This has the effect of reducing friction and facilitating operation. Further, depending on the outer peripheral protective film layer adhered to the outer peripheral surface of the protective cylinder, powder of additive material,
Since the particles reduce the frictional resistance at the time of contact with other synthetic resin pipes such as wiring and the functions of the respective parts, there is an effect that damage due to rubbing is prevented as much as possible. Further, by using the above-mentioned molding method as a molding method for forming a protective cylindrical body of an automobile wire rope, the hollow synthetic resin body of the protective cylindrical body and the base material of the inner peripheral protective film layer are mutually compatible. Therefore, there is an effect that the solid bonding can be integrally performed by heat and pressure during extrusion molding, and the thickness of the inner peripheral protective film layer can be freely adjusted. In addition, a synthetic resin in which a powder or particle additive such as a mineral or an inorganic material is mixed with a synthetic resin having a low frictional resistance, which is incompatible with the base material, and a synthetic resin which is incompatible with the base material is used inside the synthetic resin serving as the base material of the inner peripheral protective film layer. Therefore, there is an effect that a large number of additive powders or particles are attached to the inner peripheral exposed surface of the inner peripheral protective film layer by heat and pressure during extrusion molding. In addition, a large number of additive powders are also provided on the outer peripheral surface of the outer protective film layer,
There is also an effect that particles can be reliably attached and formed. In addition, a large number of powders and particles sufficiently fulfill the purpose of smoothing the movement of the wire rope inside, and also have an excellent effect of being able to prevent damage to the peripheral movable portion of the protective cylinder due to abrasion and the like. is there.

[Brief description of the drawings]

FIG. 1 is an overall front view showing a state in which a protective cylinder of the present invention is used.

FIG. 2 is a perspective view of only the protective cylinder of the present invention.

FIG. 3 is a vertical sectional side view taken along the line 1A-A of the present invention.

FIG. 4 is a vertical sectional side view taken along line 1B-B of the present invention.

FIG. 5 is a vertical sectional side view of another embodiment of the present invention.

FIG. 6 is a vertical sectional side view of a step of forming the protective cylinder of the present invention.

FIG. 7 is a vertical sectional side view of a conventional protective cylinder.

FIG. 8 is a longitudinal sectional side view of another conventional protection cylinder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Protective cylinder 2 Hollow synthetic resin body 3 Inner protective film layer 5 Additive material 7 Outer protective film layer 8 Additive material 10 Wire rope 12 Operation lever 14 First extrusion molding machine 15 Second extrusion molding machine 16 Mold die 17 Cooling Water tank 18 Drawer 20 Protective cylinder 22 Wire rope 24 Steel wire 25 Flow pipe

Claims (3)

[Claims] 1. A protective cylinder (1) for pulling and guiding a wire rope (10) is composed of an outer hollow synthetic resin body (2) and an inner inner protective film layer (3). The protective film layer (3) includes a synthetic resin serving as a base material compatible with the hollow synthetic resin body (2), and a synthetic resin, mineral, and the like having a low frictional resistance that is not compatible with the base material inside the base material. Additives (5) (5) ... of powder or particles such as inorganic substances are mixed,
A protective cylinder for a control wire for automobiles, characterized in that powder or particles of the additives (5) (5)... Are formed on the exposed inner surface of the inner peripheral protective film layer (3). 2. The protective cylinder (1) according to claim 1, wherein an outer peripheral protective film layer (7) is applied to the entire outer periphery, and the outer peripheral protective film layer (7) is provided with the hollow synthetic resin body (7). 2) Synthetic resin serving as a base material compatible with the base material, and a powder or particle additive such as a synthetic resin, a mineral, an inorganic material or the like having a low frictional resistance that is not compatible with the base material inside the base material. 2. The control wire for an automobile according to claim 1, wherein powder or particles of said additives (5), (5),... Are adhered and formed on the outer peripheral surface of said outer peripheral protective film layer (7). Protection cylinder. The first extruder (14) for molding the protective cylinder (1) has a friction incompatible with the inside of a synthetic resin serving as a base material for molding the inner peripheral protective film layer (3). Inject a mixed synthetic resin obtained by mixing additive (5) (5) ... of powder or particles of synthetic resin, mineral, inorganic, etc. with low resistance,
Into the second extruder (15), a synthetic resin for molding a hollow synthetic resin body (2) compatible with the base material of the inner peripheral protective film layer (3) is injected, and the first extruder is used. (14) and the second extruder (15) are operated at the same time, and the melted synthetic resins are integrally polymerized inside the mold die (16) by heat and pressure, and the additive (5) is melted. (5) The powder or particles of (5) are formed on the exposed surface of the inner peripheral protective film layer (3), and the protective cylinder (1) formed thereafter moves forward through the cooling water tank (17). 2. A method for forming a protective tubular body for a control wire for an automobile according to claim 1, wherein said protective wire is cut to a predetermined size by a fixed-length cutting machine (19) after passing through a drawing machine (18).