JPH08178130A - Protector, its manufacture and hose with harness - Google Patents

Abstract

PURPOSE: To provide a protector wherein a harness is capable of sufficiently following up the displacement of a hose and holding of the hose and the harness is excellent. CONSTITUTION: A protector is characterized by the formation of an irregular sectional surface having a plurality of holding sections composed of a roughly cylindrical hose holding sections 30 having spirally continuous slits 32 with a hose 1 inserted into its center hole and a harness holding section 31 with a harness 2 inserted therethrough. This protector 3 is capable of holding the hose 1 and the harness 2 along each other preventing interference with each other and being easily deformed by the slits 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protector for protecting a hose and a harness, a method of manufacturing the protector, and a hose with a harness protected by the protector. INDUSTRIAL APPLICABILITY The present invention is used for a brake hose mounting structure of an automobile.

[0002]

2. Description of the Related Art For example, as a vehicle speed sensor for detecting the vehicle speed of an automobile, a sensor for detecting the rotational speed of wheels is effective and is used in an ABS circuit. This vehicle speed sensor is fixed near the brake disc of the wheel, and a harness for transmitting a signal proportional to the number of rotations is connected from the vehicle speed sensor through the tire housing to a control device in the engine compartment or the vehicle compartment.

Further, in recent years, a harness for a pad wear sensor for detecting the amount of wear of a brake pad has also been arranged in the tire housing. The brake hose and the above harness are separately routed to prevent interference with tires and to prevent friction between the brake hose and the harness, and are held by brackets protruding from the vehicle body using an intermediate retainer, etc. Has been done. However, when the brake hose and the harness are individually routed, a large number of brackets and intermediate holders are required, which is not preferable in terms of the space for arranging and the number of parts, and the workability of assembling is also poor. Therefore, it is recalled that the brake hose and the harness are integrated, and there are various proposals.

For example, Japanese Utility Model Laid-Open Publication No. Sho 62-171371 discloses a structure in which a harness is embedded in a brake hose and the harness is led out from a base at an end. Further, Japanese Utility Model Laid-Open No. 1-109405 discloses a structure in which a harness is buried in a brake hose and exposed to the outside at an end of the brake hose.

[0005]

However, in the structure in which the harness is embedded in the brake hose, the harness cannot sufficiently follow the displacement of the brake hose due to the bouncing of the tire during traveling, which increases the rigidity of the entire hose. The problem arises. Therefore, it is conceivable to spirally hold the harness around the brake hose with reference to Japanese Utility Model Publication No. 63-16953. However, it is difficult to process the harness into a spiral shape, and even if the harness is processed into a spiral shape, the winding pitch of the harness changes due to the displacement of the brake hose if the spiral winding is performed,
The harness may extend significantly outside the brake hose.

In order to prevent such a problem, it has been considered to cover the entire harness wound in a spiral shape, but the rigidity of the hose as a whole is increased to a considerable extent, and the brake hose of the harness is also increased. The ability to follow displacement is also reduced. There is also a problem of wear due to friction between the brake hose and the harness. The present invention has been made in view of such circumstances, and an object of the present invention is to provide a protector in which the harness can sufficiently follow the displacement of the hose and which is excellent in the holding property between the hose and the harness.

[0007]

Means for Solving the Problems A first method for solving the above problems is described below.
The protector of the present invention has a substantially cylindrical shape having a spirally continuous slit, and the center hole thereof is formed by the first member through which the first member is inserted.
It is characterized in that it has an irregular cross section having a plurality of holding portions including a holding portion and a second holding portion through which the second member is inserted.

The method of manufacturing the protector of the second invention is
At least the step of forming a tubular body having an irregular cross section having a plurality of holding portions including a first holding portion through which the first member is inserted and a second holding portion through which the second member is inserted, and at least the tubular body and the cutting means. A method of manufacturing a protector, which comprises a cutting step of moving one in the axial direction while relatively rotating one about the axis of the cylindrical body to form a spiral slit in the cylindrical body, the cutting step comprising: It is characterized in that the cutting is performed while adjusting the distance between the cutting means and the cylinder so that the cutting depth of the cutting means is substantially constant over the entire cylinder.

The protector manufacturing method according to the third aspect of the present invention includes a first step of forming a cylindrical body having a constant cross section, a second step of forming a spiral continuous slit in the cylindrical body to form a spiral body, and a spiral. The body is pressed from the outer peripheral side to be plastically deformed,
A third step of obtaining a protector having a spirally continuous slit with a plurality of holding portions including a first holding portion through which a member is inserted and a second holding portion through which a second member is inserted; Is characterized in that

Further, the hose with a harness of the fourth invention comprises a hose and a harness arranged along the hose,
The hose and the harness are respectively held by the hose holder and the harness holder of the protector having a spiral cross section with a modified cross section having a plurality of holders consisting of the hose holder and the harness holder. Is characterized by.

[0011]

In the protector of the first invention, the first hose or the like is used.
The member is inserted into the first holding portion corresponding to the diameter thereof, and the second member such as the harness is also inserted into the second holding portion corresponding to the diameter thereof. Since the protector has continuous spiral slits, the protector can be easily deformed even while holding the first member and the second member, and does not hinder the displacement of the first member and the second member, and has rigidity. Hardly increases.

Also, in any cross section of the protector,
Since the first member and the second member are held by the holding portions and the positional relationship between them is unchanged, the two members are displaced while following each other, and the mutual interference between the first member and the second member and the interference with other components occur. To be prevented. In the protector manufacturing method according to the second aspect of the present invention, first, a tubular body having an irregular cross section is formed. This cylinder can be easily manufactured by extrusion molding. Then, in the next cutting step, a spiral slit is formed in the cylindrical body. If the cross-section has a perfect circular shape, it is possible to rotate the cutting means such as a cutting blade around the axis of the cylinder to bring the cylinder into contact with the cylinder at a constant depth while moving the cylinder in the axial direction. The spiral slit can be easily formed. However, in the present invention, the cross-section of the tubular body is irregular, and if the distance between the cutting means and the tubular body is constant, the cutting will be excessive or insufficient, and the opposing portion after cutting the portion to be cut will be the tubular shape. It may be cut from the inner side of the body.

Therefore, in the present invention, the cutting is performed while adjusting the distance between the cutting means and the tubular body so that the cutting depth of the cutting means is substantially constant over the entire tubular body. As a result, it is possible to cut at any portion of the cylindrical body at the same depth, and it is possible to prevent excessive or insufficient cutting. In the protector manufacturing method of the third invention,
First, in the first step, a cylindrical body having a constant cross section is manufactured.
This cylinder can be easily manufactured by extrusion molding. Then, in the second step, a spiral continuous slit is formed in the cylindrical body to form a spiral body. Since the cylindrical body has a circular cross section, the slit can be easily formed.

Then, in the third step, the spiral body is pressed from the outer peripheral side to be plastically deformed, and the first member is inserted therethrough.
A protector having a modified cross section is formed having a plurality of holding portions including a holding portion and a second holding portion through which the second member is inserted. This pressing can be performed using a heating roll or a press die. Furthermore, in the harness-equipped hose of the fourth aspect of the invention, the hose is inserted into the hose holding portion corresponding to its diameter, and the harness is also inserted into the harness holding portion corresponding to its diameter.
Since the protector has continuous spiral slits, the protector can be easily deformed even while holding the hose and the harness, does not hinder the displacement of the hose and the harness, and hardly increases the rigidity.

In any cross section of the protector,
Since the hose and the harness are held by the holding parts respectively and the positional relationship between them is unchanged, the harness sufficiently follows the displacement of the hose to prevent interference with other parts and wear due to friction between the hose and the harness. .

[0016]

EXAMPLES The present invention will be specifically described below with reference to examples. (Embodiment 1) This embodiment shown in FIG.
And a harness 2 and a protector 3.

The brake hose 1 includes a hose body 10 and
The hose body 10 is composed of bases 11 and 12 fastened to both ends. In the harness 2, a plurality of electric cords such as an electric cord extending from the ABS sensor are arranged inside. The protector 3, which is a feature of this embodiment, has a modified cross section in which a large-diameter hose holder 30 and a small-diameter harness holder 31 are connected as shown in FIG. Are formed. The hose body 10 is inserted and held in the hose holder 30, and the harness 2 is inserted and held in the harness holder 31.

The protector 3 was manufactured as follows. First, using polypropylene or polyamide as a material, a tubular body 4 having an irregular cross section having a large diameter portion 40 and a small diameter portion 41 as shown in FIG. 3 was formed by extrusion molding. Next, the cylindrical body 4 is placed in the cutting device, and the cutting blade is set to the large diameter portion 40 of the cylindrical body 4.
The spiral shown in FIG. 3 is obtained by moving the tubular body 4 along the axial direction while cutting the blade close to the tubular body 4 while rotating while rotating around the midpoint of the axis of the small diameter portion 41. Cut along the imaginary line of the shape. The cutting process can be performed continuously with the extrusion process.

At the time of this cutting process, the cutting blade is moved close to or away from the cylindrical body 4 to cut while adjusting the depth of penetration of the cutting blade into the cylindrical body 4, and cut into the cylindrical body 4. The depth of penetration of the blade was adjusted so that it was uniform at any part. As a result, the spiral slit 32 was formed without the problem that the cutting blade cuts beyond the cutting portion to the opposite side and the problem that the slit does not penetrate in the thickness direction of the tubular body 4.

Although the cutting blade is used in this embodiment, it is also possible to perform cutting work with a laser beam or water jet. In this embodiment, since the protector 3 has a spiral structure and is wound around the hose body 10 and the harness 2, the protector 3 can be easily deformed to follow the displacement of the brake hose 1, and the harness 2 also brake hose 1
Can follow the displacement of.

Since the hose body 10 and the harness 2 are separately held in the protector 3, friction is not generated between the hose body 10 and the harness 2 and wear is prevented. Since the hose body 10 and the harness 2 are arranged along each other, the wiring space within the tire housing is small, the bracket for independently fixing the harness 2 can be eliminated, and the assembling workability can be eliminated. Is excellent.

In this embodiment, the slit 32 is formed while adjusting the depth of penetration of the cutting blade. However, depending on the sectional shape of the tubular body 4, the tubular body 4 may be forcibly deformed into a perfect circular shape or the like. It is possible to perform the cutting work more easily by cutting in such a deformed state. (Embodiment 2) FIG. 4 shows a sectional view of a protector of a second embodiment. The protector 5 includes a hose holding portion 50 through which the hose body is inserted and held, and harness holding portions 51, 52, 53 and 54 which are symmetrically formed at four locations around the hose holding portion 50 and hold harnesses, respectively. The structure is the same as that of the first embodiment except that it is configured, and similarly, a slit (not shown) continuous in a spiral shape is formed.

In the protector of this embodiment, the four harnesses can be held along the hose body without friction with the hose body. Therefore, the space can be used more effectively. (Embodiment 3) FIG. 5 shows a sectional view of a protector of a third embodiment. The protector 6 is similar to that of the first embodiment except that the hose holder 60 and the harness holder 61 are separated by the partition wall 62.

In this protector 6, contact between the hose body and the harness can be more reliably prevented by the partition wall 62, and wear is further prevented. In addition, in this protector 6, the presence of the partition wall 62 may increase the rigidity and deteriorate the followability to the displacement of the brake hose. In such a case, it is also preferable to configure the partition wall 62 to be movable to some extent as shown in FIG. As a result, it is possible to prevent the hose body from contacting the harness and improve the followability with respect to the displacement of the brake hose. (Embodiment 4) FIG. 7 is a sectional view of a protector according to a fourth embodiment. The protector 7 includes a hard portion 72 made of a hard resin at the boundary between the hose holding portion 70 and the harness holding portion 71.
The configuration is the same as that of the first embodiment except that

In this protector 7, since the hard portion 72 is hard to deform, mutual interference between the hose held by the hose holding portion 70 and the harness held by the harness holding portion 71 can be prevented more reliably. In addition, this protector is 2
It can be easily manufactured by forming a cylindrical body by color extrusion molding and forming a spiral slit in it. (Embodiment 5) The protector 8 of the fifth embodiment shown in FIG.
Is the same as Example 1 except that it has a lubricating layer 80 made of a fluororesin on the inner peripheral surface. This lubricating layer 80 has 2
It can be easily formed by forming the tubular body by color extrusion molding.

In this protector, the hose and harness to be held can be relatively easily moved relative to the protector due to the presence of the lubricating layer 80, and the followability with respect to the displacement is further improved. (Embodiment 6) This embodiment relates to another manufacturing method of the protector 3 of Embodiment 1 shown in FIGS.

First, a cylindrical body having a perfect circular cross section is formed from a thermoplastic resin by extrusion molding (first step). Next, the cylindrical body 9 is placed in a cutting device, and while rotating around the axis of the cylindrical body 9 as a center, the cutting blade 90 is brought close to the cylindrical body 9 to cut the cylindrical body 9 along the axial direction. And move it
A spiral slit 91 was formed as shown in (3) to obtain a spiral body 92 (second step). In the second step, since the cylindrical body 9 has a circular cross section, the cutting is extremely easy as compared with the case of the first embodiment, and a defect such as scratching the inner surface of the protector to be obtained can be avoided.

After that, as shown in FIG.
The spiral body 92 is passed through the pair of heating rolls 93 heated to the heat deformation temperature of 2 and pressed from the outer peripheral side to be plastically deformed,
The protector 3 having the same shape as in Example 1 was manufactured (third step). A plurality of pairs of heating rolls 93 are used, and the pressing force and the pressing shape are gradually different from each other so that the spiral body 92 is gradually deformed to a predetermined cross-sectional shape as shown in FIG. By repeatedly deforming in this way, it is possible to deal with a complicated cross-sectional shape.

Instead of using the heating roll 93,
As shown in FIG. 12, a spiral plate 9 is formed by using a hot platen press 94.
It is also possible to shape 2 into a predetermined cross-sectional shape. In this case, in order to prevent excessive deformation, it is desirable to shape with the core material 95 inserted inside the spiral body 92. As a material for the core material 95, an elastic rubber core is particularly desirable.

[0030]

That is, according to the protector of the present invention,
It is possible to hold the first member and the second member so that they can be displaced along each other and while preventing mutual contact.
Therefore, the wear due to the friction between the first member and the second member is prevented, and the followability of one displacement to the other is excellent.

Further, since the protector of the present invention has a spiral shape, even if both ends of the first member and the second member are connected to other parts, it is easy to wind the protector without releasing the connection. It has the advantage that it can be attached to Therefore, according to the hose with a harness of the present invention, the wiring space is small, and the number of parts and the number of assembling steps are small, so that the manufacturing cost can be reduced.

According to the protector manufacturing method of the present invention, the protector can be manufactured easily and reliably. Further, according to the manufacturing method of the third invention, since the irregular cross section is formed by the secondary processing using a heating roll or the like, the slit has a circular cross section, so that the spiral slit can be easily formed, and the defective scratch can be surely obtained. Can be prevented.

[Brief description of drawings]

FIG. 1 is a front view of a hose with a harness according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a perspective view of the cylindrical body of the protector according to the first embodiment of the present invention before slit formation.

FIG. 4 is a sectional view of a protector according to a second embodiment of the present invention.

FIG. 5 is a sectional view of a protector according to a third embodiment of the present invention.

FIG. 6 is an enlarged cross-sectional view of the main part of the protector, showing another aspect of the protector of the third embodiment of the present invention.

FIG. 7 is a sectional view of a protector according to a fourth embodiment of the present invention.

FIG. 8 is a sectional view of a protector according to a fifth embodiment of the present invention.

FIG. 9 is an explanatory diagram showing a state where the second step is being performed in the sixth embodiment of the present invention.

FIG. 10 is an explanatory diagram showing a state where the third step is being performed in the sixth embodiment of the present invention.

FIG. 11 is an explanatory diagram showing changes in the cross-sectional shape of the spiral body in the third step in the sixth example of the present invention.

FIG. 12 is an explanatory view showing another aspect of the third step in the sixth embodiment of the present invention.

[Explanation of symbols]

1: Brake hose 2: Harness 3:
Protector 10: Hose body 30: Hose holding part 3
1: Harness holding part 32: Slit

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location F16L 11/127 33/00 33/28

Claims (4)

[Claims] 1. A plurality of cylinders each having a substantially cylindrical shape having spirally continuous slits, the center hole of which includes a plurality of first holding portions through which the first member is inserted and a plurality of second holding portions through which the second member is inserted. A protector characterized by having an irregular cross-section with a holding part of. 2. A first holding part and a second part through which the first member is inserted.
A step of forming a tubular body having a modified cross-section having a plurality of holding portions including a second holding portion through which a member is inserted; and at least one of the tubular body and the cutting means is relatively centered on the axis of the tubular body. And a cutting step of rotating the shaft in the axial direction to form a spiral slit in the cylindrical body, the method comprising the step of: A method for manufacturing a protector, which is performed while adjusting a distance between the cutting means and the tubular body so that the tubular body is substantially constant as a whole. 3. A first step of forming a cylindrical body having a constant cross-section, a second step of forming a spiral continuous slit in the cylindrical body to form a spiral body, and the spiral body from the outer peripheral side. The first holding portion, through which the first member is inserted, and the second member, through which the second member is inserted, by pressing and plastically deforming
A third step of obtaining a protector having a spirally continuous slit and having a plurality of holding portions including a holding portion, and a third step of producing the protector. 4. A spiral consisting of a hose and a harness arranged along the hose, the hose and the harness having an irregular cross-section having a plurality of holding parts including a hose holding part and a harness holding part. A hose with a harness, which is held by the hose holding part and the harness holding part of a protector having a slit continuous with the hose.