JP2000074038A - Protection cylindrical body of control wire for automobile and forming method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a rough face part on the surface to reduce resistance by mixing base material of a synthetic resin having compatibility with a hollow synthetic resin body and additive of particles and powder of a synthetic resin, inorganic matter, mineral, and the like of higher melting point and smaller frictional resistance than the base material with an inner circumferential protection layer. SOLUTION: In this protection cylindrical body 1, a hollow synthetic resin body 2 on the outer circumference and an inner circumference protection film layer 3 on the inside use synthetic resin having compatibility with the hollow synthetic resin body 2 of smaller frictional resistance as base material, and it is formed out of a synthetic resin mixed with additives 4, 4,... of powders and powder of a synthetic resin, inorganic matter, mineral, and the like of higher melting point and smaller frictional resistance than the base material. Rough face parts 5, 5 having many recessed and projecting parts are formed on the surface on the exposed face side of the inner circumference protection film layer 3. Hereby, friction of the contact faces of inner face of the protection cylindrical body and a control wire is reduced, and an effect preventing breakdown extending over a long time is generated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided in various parts of a motor vehicle such as a trunk open, a bonnet open, a fuel open, a slottle, a chiyoke, a brake, a mission, and a wind regulator. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective cylinder for a control wire for an automobile and a method of forming the same, wherein the operation of force and displacement is transmitted by indexing operation of a lever or the like.

[0002]

2. Description of the Related Art Conventionally, a protective cylinder for smoothing the operation of a control wire of this kind for a long period of time is known.
As shown in FIG. 1, the inner wire rope is pushed, pulled or strongly actuated as shown in FIG. However, there is a problem in that the material is extremely worn and damaged, making it unusable. Further, in order to prevent the protection cylinder from being damaged or the like, as shown in FIG. 8, a double protection cylinder made of a synthetic resin having a steel wire or flat steel embedded on the inner surface thereof is provided on the outer circumference of the protection cylinder. In some cases, it may be damaged to prevent wear due to contact, protect from insulation, etc., but in this case, there is a problem that the protective tube is damaged due to wear from the inner surface of the steel wire or flat steel and the outer peripheral portion of the protective tube .

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the conventional problems, and a main object of the present invention is to provide a protective tubular body for a control wire with an outer hollow synthetic resin body and an inner hollow synthetic resin body. The inner circumferential protective film layer is made of a synthetic resin having a low frictional resistance compatible with the hollow synthetic resin body and having a higher melting point and a lower frictional resistance than the base material. Powders, particles, and the like of resins, inorganics, and minerals are mixed with the base material. This is not completely melted at the extrusion molding temperature by the heat and pressure of the extrusion molding machine. Particles of synthetic resin, inorganic material, minerals, etc., powder or powder are formed on the exposed surface of the inner protective film layer to form a rough surface portion with irregularities. It is intended to reduce the friction caused by the contact of the object and prevent breakage due to injury.

[0004]

In order to achieve the above-mentioned object, in the present invention, a protective cylinder for moving and guiding a control wire is composed of a hollow synthetic resin body and an inner inner protective film layer. The inner protective layer is made of a synthetic resin base material having compatibility with the hollow synthetic resin body, and a synthetic resin having a higher melting point and lower frictional resistance than the base material, particles of inorganic and mineral materials, and an additive material of powder. Is formed by using a mixed synthetic resin, and a rough surface portion having irregularities is formed on the exposed surface of the inner peripheral protective film layer to reduce the resistance of the contact surface.
Further, an outer peripheral protective film layer is provided on the outer periphery of the protective cylinder. The outer peripheral protective film layer is made of a synthetic resin base material having a low frictional resistance that is compatible with the hollow synthetic resin body, and a synthetic resin having a higher melting point and a lower frictional resistance than the base material, and powders and particles of inorganic materials and minerals. And a plurality of roughened surface portions formed on the outer peripheral exposed surface of the outer peripheral protective film layer to reduce the frictional resistance of the contact surface. As a method of forming the protective cylinder, a first extruder includes a base material of a synthetic resin having a low frictional resistance and having compatibility with a hollow synthetic resin body for forming an inner peripheral protective film layer; A synthetic resin having a higher melting point and a lower frictional resistance, or a mixed resin of powders and particles of inorganic and mineral substances is injected. In addition, an olefin-based synthetic resin for forming the hollow synthetic resin body of the protective cylinder is injected into the second extruder. The first extruder and the second extruder are simultaneously operated, and the first extruder and the second extruder are simultaneously operated inside the die.
The inner peripheral protective film layer is first formed by an extruder, and then the hollow synthetic resin body formed by the second extruder is integrally polymerized. At this time, after the mixed synthetic resin having a different melting point of the inner peripheral protective film layer is formed by heat and pressure, a large number of uneven surface rough portions are formed on the exposed surface while passing through the mold die, and then a predetermined size is formed. This is a molding method that is cut into pieces.

[0005]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
As shown in FIG. 1, a protective cylinder (1) through which a control cable (10) is inserted operates various parts of an automobile, and is, for example, a trunk open, a bonnet open, a fuel lid open, a slottle. To prevent friction and damage due to the pulling operation of the control cable (10) inside the operation of the control cable (10), the yoke, the brake, the mission, the wind regulator and the like.

Next, a protective cylinder (1) shown in FIG. 2 comprises an outer hollow synthetic resin body (2) and an inner inner protective film layer (3).
Is based on a synthetic resin having a low frictional resistance and being compatible with the hollow synthetic resin body (2), and has a melting point higher than that of the base material and a low frictional resistance, such as a synthetic resin, a powder of inorganics and minerals, and particles. It is formed of a synthetic resin in which additives (4), (4),... Are mixed. And the inner peripheral protective film layer (3)
A large number of rough surfaces (5) (5) ...
... is formed.

FIG. 3 shows a state in which the control cable (10) is inserted into the communication hole (8) of the line AA in FIG. 1 and FIG. 4 is a vertical side view of the same.

Next, in the embodiment of the protective cylinder (1) shown in FIG. 5, an outer peripheral protective film layer (6) is laminated on the outer peripheral surface of the protective cylinder (1). The outer peripheral protective film layer (6) includes:
As a constituent material thereof, a base material of a synthetic resin having a low frictional resistance compatible with the hollow synthetic resin body (2), a synthetic resin having a higher melting point and a lower frictional resistance than the base material, a powder of an inorganic material and a mineral, Polymeric coating is carried out on the outer periphery with a synthetic resin in which the additive materials (4) (4)... Of the particles are mixed. On the outer peripheral film layer (6), a large number of rough surface portions (7) (7)... Formed by heat are formed on the outer peripheral exposed surface.

The embodiment shown in FIG. 6 explains a method for forming the protective cylinder (1) of the present invention. The first extruder (14) forms the inner peripheral protective film layer (3). As a constituent material, a base material of a synthetic resin having a low frictional resistance compatible with the hollow synthetic resin body (2) of the olefin resin located on the outer periphery, and various synthetic resins having a higher melting point than the base material and a small frictional resistance. A synthetic resin obtained by mixing powders of inorganic materials and minerals, and additives (4) (4)... Of particles is injected. Next, an olefin-based synthetic resin for molding the hollow synthetic resin body (2) of the protective cylinder (1) is injected into the second extruder (15). Then, the first extruder (14) and the second extruder (15) are operated at the same time, and each compatible molten synthetic resin is subjected to heat and pressure to form a die (16). ) Are polymerized and integrated together. At this time, the additive materials (4) and (4) do not flow on the surface of the inner peripheral protective film layer (3) due to the difference in melting point due to heat and pressure as in the case of the base material. Is extruded while maintaining the original shape, and forms a large number of rough surface portions (5) (5)... Thereafter, the formed protective cylinder (1) is advanced, passes through the cooling water tank (17), is cut through the drawer (18), and is cut into a predetermined size by the fixed-length cutting machine (19).

FIGS. 7 and 8 show a conventional protective cylinder (20) and (20), respectively.
0) has a control wire (2) indexed inside a hollow synthetic resin body (21) formed of synthetic resin.
In this case, the hollow synthetic resin body (21) on the outer periphery is easily worn and easily damaged by the movement of the internal control wire (22). Further, in the conventional example shown in FIG. 8, a steel wire or the like (24) is buried 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 peripheral synthetic resin pipe (23) is covered to make it tough. In this case, the production is time-consuming, labor-intensive, and complicated, so that it is very expensive. Furthermore, there is also a problem that the inner surface of the steel wire and the outer peripheral portion of the protective cylinder are worn and the protective cylinder is damaged.

Next, as a constituent material used for the protective cylinder (1) of the present invention, a metal wire is used as a control cable material, and an olefin resin, a styrene resin, Use a synthetic resin such as urethane or nylon. The powder and particles of the additive having a low melting point and a high melting point include olefin resin, urethane resin, styrene resin, silicon resin,
Synthetic resins such as fluorine-based resins and nylon resins, minerals such as molybdenum, and inorganics such as silica and mica are used.

[0012]

Since the present invention is constructed as described above, if it is used as a protective cylinder for a control wire used for various functions for automobiles, the sliding between the control wire and the protective cylinder is performed. Since the frictional resistance of the moving contact portion is small, it can be easily worn or damaged due to rubbing, and the operation of the control wire is small, so that the operation can be performed extremely lightly and smoothly. Since the inner peripheral protective film layer constituting the protective cylindrical body is made of a synthetic resin having compatibility with the outer peripheral hollow synthetic resin body, both are firmly bonded and integrated, and a synthetic resin having a small frictional resistance is used. Since a base material and a synthetic resin having a melting point higher than that of the base material and a low frictional resistance, a mixed synthetic resin obtained by mixing powders of inorganic and mineral materials, and additives of particles are used, the exposed surface of the inner peripheral protective film layer is formed. An uneven surface can be easily and reliably formed on the surface, and there is an effect that friction between the inner surface of the protective cylinder and the contact surface with the control wire is reduced to prevent damage for a long period of time. In addition, according to the outer peripheral protective film layer adhered to the outer peripheral surface of the protective cylinder, the rough surface portion of the irregular surface of the outer peripheral surface reduces the frictional resistance at the time of contact with the synthetic resin pipe and various functions,
This has the effect of preventing damage or the like due to rubbing. Furthermore,
According to the method for forming the protective cylinder, the inner peripheral protective film layer having compatibility with the hollow synthetic resin body of the protective cylinder has a base material of a synthetic resin having a small frictional resistance and a melting point higher than that of the base material. Since a synthetic resin with a low frictional resistance, mixed powder of inorganic and mineral powders, and additives of particles were used, a large number of exposed surfaces of the inner protective film layer on the inner periphery were exposed to heat and pressure during extrusion molding. There is an effect that the rough surface portion of the unevenness can be easily and reliably formed. In addition, the outer peripheral protective film layer can reliably form a large number of rough surfaces on the outer peripheral surface, smooth the movement of the control wire, and prevent damage to the peripheral moving portion of the protective cylinder due to abrasion. There is an excellent effect that it can be prevented.

[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 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 longitudinal sectional view of the protective cylinder of the present invention.

FIG. 5 is a longitudinal sectional view of the protective cylinder 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 vertical sectional side view of a conventional protection cylinder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Protective cylinder 2 Hollow synthetic resin body 3 Inner peripheral protective film layer 4 Additive material 5.7 Rough surface part 6 Outer protective film layer 8 Communication hole 10 Control wire 12 Operation lever 14 First extrusion molding machine 15 Second extrusion molding machine 16 Mold die 17 Cooling water tank 18 Drawer 19 Fixed-size cutting machine 25 Flow pipe

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Katsuhisa Kato 1-18-12 Kubogaoka, Moriya-cho, Kitasoma-gun, Ibaraki F-term in System Technical Co., Ltd. (Reference) 3J032 AB01 AB33 BB04 BB05

Claims (3)

[Claims] 1. A protective cylinder for guiding a control wire is composed of an outer hollow synthetic resin body and an inner inner protective film layer, and the inner protective film layer is compatible with the hollow synthetic resin body. A synthetic resin base material having a low frictional resistance having
It is formed of a synthetic resin having a melting point higher than that of the base material and having a low frictional resistance, and a mixed synthetic resin obtained by mixing powders of inorganic and mineral substances and additives of particles, and has irregularities on the exposed surface of the inner peripheral protective film layer. Protective tubular body for automotive control wire characterized by forming a rough surface portion 2. The hollow synthetic resin body according to claim 1, wherein an outer peripheral protective film layer is applied to the outer periphery, and the outer peripheral protective film layer has a low frictional resistance compatible with the hollow synthetic resin body. A resin base material and a synthetic resin having a melting point higher than the base material and a lower frictional resistance, a synthetic resin obtained by mixing powders of inorganic and mineral substances, and additives of particles, and forming an outer periphery of the outer peripheral protective film layer. 2. A protection cylinder for a control wire for an automobile according to claim 1, wherein a rough surface portion having irregularities is formed on the exposed surface. 3. The first extruder for forming the protective cylinder has a base made of a synthetic resin having a low frictional resistance compatible with the outer hollow synthetic resin body as a constituent material for forming the inner peripheral protective film layer. Material and a synthetic resin having a melting point higher than that of the base material and a low frictional resistance, a mixed synthetic resin obtained by mixing powders of inorganics and minerals, and additives of particles, and injecting the protective cylinder into a second extruder. The synthetic resin of the hollow synthetic resin body is injected, and the first extruder and the second extruder are simultaneously operated, and the molten synthetic resins are integrally polymerized inside the die with heat and pressure. Bonding, forming a roughened surface portion on the exposed surface of the inner peripheral protective film layer, and then the formed protective cylinder advances through the cooling water tank, passes through a drawer, and has a predetermined size by a fixed size cutting machine. 2. The self-cutting device according to claim 1, wherein A method of forming a protective cylinder for a control wire for a motor vehicle.