JPH08289437A - Protector - Google Patents

Abstract

PURPOSE: To protect a tape against damage at the end part by providing a protrusion having semicircular cross-section at the end part of outer wall thereby setting the radius of curvature at the protrusion longer than one half of the thickness of outer wall. CONSTITUTION: Protrusions 13, 15 having semicircular cross-section are provided at the end parts of the outer wall 5, 7 of a protector 11. Consequently, the radius of curvature at the protrusion can be set longer than one half of the thickness (d) of outer wall 5, 7 but shorter than the thickness (d) of outer wall 5, 7. With such arrangement, a tape T is not damaged easily at the end part of the outer wall 5, 7 at the time of winding the tape T or after winding the tape T. Consequently, even an ordinary tape T can be protected against damage regardless of the thickness (d) of outer wall 5, 7 resulting in the stabilization of quality and the enhancement of workability.

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 electric wires, wire harnesses, optical fibers, etc. after wiring.

[0002]

2. Description of the Related Art An example of a conventional protector of this type is shown in FIG.
(See Japanese Utility Model Laid-Open No. 2-17919).

As shown in FIG. 8, a protector 1 for protecting the outer surface of the wire harness W has a bottom plate 3 and a pair of outer walls 5, 7 which are provided upright from both sides of the bottom plate 3. The bottom plate 3 and the outer walls 5 and 7 form a housing portion 9 for housing the wire harness W and having a substantially U-shaped cross section.

The protector 1 is wound around the outer surface of the wire harness W with tapes T so that the wire harness W is accommodated in the accommodating portion 9 so as not to come off from the wire harness W.

[0005]

However, in the protector 1 shown in FIG. 8, since the tips of the outer walls 5 and 7 are formed in a square shape, as shown in FIG. The stress applied to the tapes T was concentrated at the outer corners A, and the tapes T were easily damaged during winding. Further, even when the tapes T are wound without being damaged, the tapes T contacting the angular tip end are rubbed against other members or the like and damaged in the subsequent manufacturing process or transporting process of the wire harness W. There was a fear that

Such an inconvenience can be prevented by using, for example, thick and hard-to-cut tapes, but it is costly to make the whole thick because of the limited portion which is easily damaged. Will be invited. Further, since the tapes wound around the outer circumference of the wire harness W are thin, the tapes T must be replaced with thick ones only when the protector 1 is wound, which complicates the work. Will end up.

As shown in FIG. 9B, the outer wall 5,
Although it is possible to make the tapes T less likely to be damaged by forming the tip end portion of 7 into a substantially semicircular cross-section rather than a square shape, the maximum curvature when the tip portions 5 and 7 are formed into a substantially semicircular cross-section. Since the radius r is restricted to half the thickness d of the outer walls 5 and 7, there is a risk that a sufficient radius of curvature cannot be obtained depending on the thickness of the outer walls 5 and 7.

[0008] Therefore, an object of the present invention is to provide a protector which can prevent the damage of the tapes at the end portion without depending on the thickness of the outer wall and without using the particularly difficult-to-cut tapes. .

[0009]

According to a first aspect of the present invention, there is provided a protector for protecting an outer surface of a filament body wound on a filament body with a tape or the like, wherein a cross section of an end portion of an outer wall of the protector is substantially reduced. It is characterized in that a semicircular protrusion is provided.

A second aspect of the present invention is the protector according to the first aspect, wherein the protrusion is provided on the opposite side of the filament body.

[0011]

According to the first aspect of the present invention, since the protrusion having the substantially semicircular cross section is provided at the end of the outer wall of the protector, the radius of curvature of the protrusion is made longer than half the thickness of the outer wall. be able to. In addition, the radius of curvature when the opposite side of the projection of the end portion is formed in an arc shape can be made longer than half the thickness of the outer wall. Therefore, the tapes are less likely to be damaged at the ends.

According to the invention of claim 2, in addition to the function of the invention of claim 1, since the projection is provided on the opposite side of the linear body, the outer wall of the external wall is the side of the linear body due to the winding force of the tapes. The side opposite to the protrusion of the end portion is largely separated from the tapes in a state of being bent. Therefore, even if the opposite side of the protrusion of the end portion is formed into a square shape, it is difficult for the tapes to come into contact with the square portion,
Tapes are less likely to be damaged.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG.
1 is a sectional view of FIG. 1, and FIG. 3 is an enlarged view of a C portion of FIG.

As shown in FIG. 1, the protector 1 for protecting the outer surface of the wire harness W as a filament is a bottom plate 3
And a pair of outer walls 5 and 7 standing from both sides of the bottom plate 3 and having different heights. The bottom plate 3 and the outer walls 5 and 7 form a housing portion 9 for housing the wire harness W and having a substantially U-shaped cross section.

The protector 1 is wound around the outer periphery of the wire harness W with tapes T so as not to come off from the wire harness W in a state where the wire harness W is housed in the housing portion 9.

As shown in FIG. 2, the outer wall 5, 7 of the protector 1 has a projection 13 having a semicircular cross section at the tip (end) of the outer wall 5, 7.
15 are projected. The protrusions 13 and 15 are formed on the outer walls 5 and 7, respectively.
From the surface of the housing portion 9 to the opposite side (the opposite side of the wire harness W).

As shown in FIG. 3, the protrusions 13 and 15 have a radius of curvature R which is larger than half the thickness d of the outer walls 5 and 7 and is equal to or less than the thickness d of the outer walls 5 and 7. Is formed. The opposite sides 17 and 19 of the protrusion 15 are formed in an arc shape, and the radius of curvature thereof is substantially equal to the radius of curvature R of the protrusions 13 and 15.

According to the protector 1 of this embodiment,
Since the protrusions 13 and 15 each having a substantially semicircular cross section are provided at the tips of the outer walls 3 and 5, the radius of curvature R of the protrusions 13 and 15 is set to the outer wall 5.
It can be longer than half the thickness d of 7.
Also, regarding the radius of curvature when the opposite sides 17 and 19 of the protrusions 13 and 15 are formed in an arc shape, the thickness d of the outer walls 5 and 7 is
Can be longer than half the length.

As a result, when the tapes T are wound or after the tapes are wound, the tapes T are less likely to be damaged at the tips of the outer walls 5, 7, so that the thickness of the outer walls 5, 7 is not particularly damaged. It is possible to prevent damage to the tapes T without using difficult-to-use tapes T, to stabilize quality and improve workability.

Further, as shown in FIG.
Is protruded from the surface of the outer walls 3, 5 to the opposite side of the accommodating portion 9, the outer walls 5, 7 are bent from the initial state (two-dot chain line in the figure) to the accommodating portion 9 side by the winding force of the tape T. At this time (solid line in the figure), the distance L1 between the inner side E1 of the tip (opposite side of the protrusions 13 and 15) and the tape T increases. That is, when the protrusions 13 and 15 are provided at the tip (FIG. 4),
Comparing with the case where the outside of the tip is simply formed in an arc shape (FIG. 5), the distances L1 and L2 between the inside E1 and E2 of the tip and the tapes T are the distances when the projections 13 and 15 are provided. L
1 is significantly larger than the distance L2 when not provided, and the inner side E1 of the tip portion when the protrusions 13 and 15 are provided is significantly separated from the tapes T. Therefore, even if the inner side E1 of the tip portion is formed in a square shape, it becomes difficult for the tapes T to come into contact with the square portion, and the tapes T can be prevented from being damaged.

6 and 7 are perspective views showing modifications of this embodiment.

The protector 21 shown in FIG. 6 is formed by forming the protector 11 shown in FIG. Further, the protector 31 shown in FIG. 7 is provided with protrusions 37 and 39 at the tip portions (end portions) of the outer walls 33 and 35 formed in a substantially L-shaped cross section, and further at the L-shaped corner portions (end portions). Also has a protrusion 41. The projecting direction of the projecting portion 41 is the opposite side of the housing portion 9 for both the protectors 21 and 31.

According to such protectors 21 and 31, it is possible to obtain the same effect as that of the protector 11. Further, in the protector 31 shown in FIG. 7, it is possible to favorably prevent damage to the tapes T at the corners. The protectors 11 and 12 shown in FIG. 1 and FIG.
Also in the case of 1, the protrusions may be provided at the corners between the bottom wall 3 and the outer walls 5, 7.

[0025]

As described above, according to the invention described in claim 1, the radius of curvature of the protrusion can be made longer than half the thickness of the outer wall, and the opposite side of the protrusion can be made. In the case of an arc shape, the radius of curvature can be made longer than half the thickness of the outer wall, so that the tapes are less likely to be damaged at the ends. Therefore, regardless of the thickness of the outer wall and without using particularly difficult-to-cut tapes, damage to the tapes can be prevented, quality can be stabilized, and workability can be improved.

According to the invention of claim 2, claim 1
In addition to the effect of the invention described in (1), since the projection is provided on the opposite side of the filament from the surface of the outer wall, the tip end portion in a state in which the outer wall is bent toward the filament by the winding force of the tapes. The opposite side of the protrusion of the is greatly separated from the tapes. Therefore, even if the opposite side of the protrusion of the tip portion is formed into a square shape, it becomes difficult for the tapes to come into contact with the square portion, and the damage to the tapes can be prevented.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view of FIG.

FIG. 3 is an enlarged view of a portion C in FIG. 2;

FIG. 4 is a front view showing a state where the outer wall of the protector shown in FIG. 1 is bent by tapes.

FIG. 5 is a front view showing a state in which an outer wall of a conventional protector is bent by tapes and the like.

FIG. 6 is a perspective view showing a modified example of the present invention.

FIG. 7 is a perspective view showing a modified example of the present invention.

FIG. 8 is a perspective view showing a conventional protector.

9A and 9B are views showing a conventional protector, in which FIG. 9A is a sectional view of FIG. 8, and FIG. 9B is an enlarged view of a portion A of FIG.

[Explanation of symbols]

 5 outer wall 7 outer wall 11 protector 13 protrusion 15 protrusion 21 protector 31 protector 33 outer wall 35 outer wall 37 protrusion 39 protrusion 41 protrusion T tape W wire harness (striated body)

Claims (2)

[Claims] 1. A protector, which is wound around a filament body with tapes to protect the outer surface of the filament body, wherein a protrusion having an approximately semicircular cross section is provided at an end of an outer wall of the protector. And protector. 2. The protector according to claim 1, wherein the protrusion is provided on the opposite side of the filament body.