JP2600985Y2 - Protector corrugated tube fixing structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrugated tube fixing structure of a protector for use in, for example, a branch portion of a wire harness (car-assembled electric wire) which is bundled and protected by a flexible tube such as a corrugated tube.

[0002]

2. Description of the Related Art Conventionally, at a branch portion of a wire harness which is converged and protected by a flexible tube, a protector made of a synthetic resin formed in a T-shaped tube as shown in FIG. Reference numeral 5 is fitted to the corrugated tube 4 covering the wire harness 1 to improve the order and protection of the wiring.

[0003] However, the conventional structural protector cannot cope with a large change in the outer diameter of the corrugated tube due to a change in the number of wire harnesses to be bundled, for example. I can no longer do it. Therefore, in this type of protector, a plurality of types of protectors having different dimensions must be prepared for the difference in the corrugated tube diameter, and this lacks versatility, resulting in an increase in management costs and a decrease in work efficiency.

[0004]

Therefore, in order to solve the above-mentioned difficulties, the applicant of the present invention disclosed in Japanese Utility Model Laid-Open Publication No. 54-85396, in which an engaging projection having a different shape corresponding to the corrugated tube diameter was provided. We have proposed a branching device for multiple electric wires formed on the inner surface of a cable. The branching tool will be described in more detail with reference to FIG. 9. The branching tool is large because it is applied to a thin corrugated tube on the inner surface of each of the semi-cylindrical members A, B, C, and D that can be opened and closed in three directions. Semi-circular engagement projection 5
a ₂ and 5b ₂ are formed inside the protector 5, and are applied to a thick corrugated tube.
a ₃ , 5b ₃ are formed outside the engaging projections 5a ₂ , 5b ₂ and correspond to the diameter of the corrugated tube when the semi-cylindrical members A, B, C, D are mounted on the corrugated tube 4 in an expanded state. the locking projection 5a _2, 5a ₃ and 5b _2, wherein one of 5b ₃ so as to engage the groove 4a of the corrugated tube 4 semicylindrical body a, B, C, closing the D and Thereby, the corrugated tube 4 can be firmly fixed. In other words, this branching tool was able to cope with two different types of corrugated tube diameters, and the convenience was significantly improved.

[0005] However, the applicant of the present invention has disclosed that even with such a branching tool having improved and excellent advantages, the engaging projection for the thin corrugated tube formed inside the protector holds the corrugated tube having a small diameter. In this case, since the corrugated tube is thin, a slight play is generated between the protector and the corrugated tube at the open end of the protector, and it has been found that this play is a factor of generating abnormal noise and the like.

The present invention has been made in view of the above circumstances, and provides a corrugated tube fixing structure of a protector which can securely fix the corrugated tube even when the diameter of the corrugated tube is changed and does not generate abnormal noise. The purpose is to do.

[0007]

SUMMARY OF THE INVENTION The above object of the present invention, in the corrugated tube fixing structure of the protector to allow penetration of the wire harness is covered with the corrugated tube, at least on the end portion, engages in the groove of the corrugated tube Corrugations of different sizes with mating edges
Engaging groove and is provided for holding the spacer and the spacer is selected changing and controlling the position according to Tochubu diameter
It is achieved by corrugated tube fixing structure of the protector, wherein a Turkey.

[0008]

The protector can be adapted to any outer diameter corrugated tube by replacing the spacer with a predetermined one according to the diameter of the corrugated tube and engaging with the engaging groove of the protector. Further, the protector can firmly fix the corrugated tube by providing a plurality of engaging grooves and holding the corrugated tube at a plurality of positions via the spacer.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a corrugated tube fixing structure of a protector according to the present invention.
FIG. 1 is an exploded partial perspective view of a corrugated tube fixing structure of a protector according to an embodiment of the present invention. Although not shown in FIG. 1, the protector applied to the present embodiment can be used for the T-shaped branch portion having the conventional structure shown in FIG.

In the figure, a corrugated tube 11 is
As in the prior art, it is provided with a split groove 11a formed of a flexible resin material and linearly continuous in the axial direction so as to be openable and closable. The wire harness 10 can be focused by closing after the wire harness 10 has penetrated. The spacer 12 is a pair of spacer pieces 12a ₁ , each of which is formed by half-dividing a substantially rectangular plate.
12a ₂ has semicircular edges 12b ₁ , 12b ₂ , and the semicircular edges 12b ₁ , 12b ₂ have a plurality of circles that make the corrugated tube 11 flexible. The spacer piece 12 is provided so as to be engageable with the circumferential groove 11b.
When a ₁ and 12a ₂ are integrated, the corrugated tube 1
Hold 1

The protector 13 has a main body 15 having a U-shaped cross section.
Is integrally formed of a synthetic resin material such as polypropylene having a cover 16 which can be opened and closed by a hinge portion 14, and the corrugated tube 11 in which the wire harness 10 is bundled is provided so as to penetrate into the main body 15. ing. Further, the protector 13 is provided with an end 15a near the opening of the main body 15 through which the wire harness 10 is guided.
, There are provided partitions 19, 20 having a double wall structure protruding from side walls 18 facing each other.
An engagement groove 21 into which the spacer 12 is fitted is formed between 0.

The cover 16 has a short wall 17 overlapping the side wall 18 when the non-hinge side edge is slightly bent and closed.
In addition, a locking opening 22 for locking the cover 16 to the main body 15 is provided through the short wall 17.
On the other hand, on the side wall 18 on which the short wall 17 is overlapped, a locking projection 23 is provided so as to face the locking opening 22. Then, the cover 16 is attached to the engagement groove 21.
The main body opening surface 15b including the terminal end 21a is provided so as to be able to be closed, and the locking projection 23 is fitted into the locking opening 22 so as to be locked to the main body 15. The cover 16 configured as described above functions as a position regulating unit for the spacer 12 fitted in the engagement groove 21.

Next, a procedure for fixing the corrugated tube will be described with reference to FIG. 2. In the procedure for fixing the corrugated tube, the engaging groove 21 in the main body 15 with the cover 16 opened has a predetermined shape. One spacer piece 12a ₂
Is inserted from the terminal end 21a of the engaging groove 21, and the wire harness 10 covered with the corrugated tube 11 is penetrated into the main body 15. At that time, the spacer piece 12a ₂ are arranged such that semicircular edge 12b ₂ engages one of the plurality of circumferential grooves 11b of the corrugated tube 11. Then, another spacer pieces 12a ₁ is to be opposed to the previous spacer pieces 12a _2, the engagement groove 21 by the semicircular edge 12b ₁ engaged with the groove 11b of the corrugated tube 11 Is inserted into. Finally, the cover 16 is rotated and closed in the direction of arrow R, and the locking opening 2 is closed.
The cover 16 is locked in a closed state by engaging the locking projection 2 with the locking projection 23.

When the corrugated tube is held by the protector in the above procedure, the position of the spacer 12 is regulated by the cover 16 and the spacer 12 is prevented from coming off from the engaging groove 21. Can be firmly fixed. Moreover, the protector 15 can be adapted to any corrugated tube simply by replacing the spacer 12 with one having semicircular edges 12b ₁ and 12b ₂ corresponding to the thickness of the corrugated tube 11.

FIG. 3 shows a modified example of the spacer applied to the present invention. That is, the spacer 30 has an opening 31 for fitting a tube in a circular shape in accordance with the outer diameter of a corrugated tube (not shown) at the center of a substantially rectangular plate, and communicates with the opening 31 to form a radius. It is provided with a slit 32 cut outward. And fitting of this spacer 30 to the corrugated tube is as follows.
The upper portion 30a of the spacer is deflected in the direction of arrow A with respect to the lower portion 30b with the slit 32 as a boundary, so that the opening 31 is opened.

Such a spacer is inserted into the engaging groove of the protector constructed in the same manner as in the previous embodiment shown in FIGS. 1 and 2, and the position is regulated by the cover to be fixed to the engaging groove. This is configured as a single member for each corrugated tube having a different outer diameter dimension, so that workability is improved and management by reducing the number of constituent members is facilitated, thereby improving simplicity.

FIGS. 4 and 5 show another modification of the spacer applied to the present invention. The spacer 40 includes a base member 41 and a support member 42 in which a pair of leg pieces 42a engaged with the base member 41 are integrated. The base member 41 has a thickness extending in the axial direction over substantially three of a plurality of grooves formed in a circumferential direction of a corrugated tube (not shown), and has a flat U-shaped curved portion 41a. It is configured. The curved portion 41a is provided in a shape that partially engages with an applicable corrugated tube. Further, the base member 41 is formed in a hollow area 41b whose inside is hollowed along the member plane at the periphery of the curved section 41a, and the curved section 41a is formed in the thickness direction by the hollow area 41b. It is divided into two parts. The curved portion 41a _1, 41a _2, which is bisected to the thickness direction, 2 of the plurality of circumferential grooves formed in the corrugated tube
One groove.

On the other hand, the support member 42 is provided so as to be engaged with and fixed to the base member 41 by the pair of leg pieces 42a, and has a corrugated tube diameter between the support member 42 and the curved portion 41a of the base member 41. Is formed in a circular opening 43 having a size corresponding to. That is, the support member 42 is provided so that the leg pieces 42a are spaced apart from each other and can be fitted into the hollow area 41b. The leg piece 42a has a contact surface 42b with the corrugated tube. It is provided in a curved shape corresponding to the outer peripheral surface. Therefore, the support member 42 is
a is inserted into the hollow area 41b.
1 between the curved portion 41a and the contact surface 42b of the leg piece 42a.
3 can be formed. Further, the leg pieces 42a are configured into a plurality of gears 42c that the back of Taise' surface 42b is made of induction included surface 42c ₁ and catching surface 42c ₂ Prefecture. And this gear 4
A gear 41c corresponding to the gear 42c is provided in a hollow area 41b of the base member 41 opposed to 2c.

The spacer 40 configured as described above engages the curved portions 41a ₁ and 41a ₂ of the base member 41 with the two grooves of the corrugated tube in a state where the base member 41 and the support member 42 are separated. Combine. Then, the support member 42 the in airspace the leg 42a is 41
b, and the contact surface 42b is engaged with the groove of the corrugated tube. The contact surface 42
The groove of the corrugated tube with which b is engaged is a groove located between the two grooves with which the curved portions 41a ₁ and 41a _{2 of the} base member 41 engage. The support member 42 has its after the leg 42a and is fitted in said airspace 41b, the base member is inserted into the 41 gear 4 in said airspace 41b and its gear 42c until presses the corrugated tube outer peripheral surface
1c. Thus, the base member 41
By perfect gear coupling between the support member 42 and the support member 42, perfect coupling between them is achieved. Therefore, the spacer 40 is firmly attached to the corrugated tube. The corrugated tube on which the spacer 40 is mounted penetrates a protector (not shown) configured in the same manner as the embodiment of FIG. You.

The spacer 40 according to the present embodiment is configured as described above, so that the base member 41 and the support member 42 are firmly connected to each other and can be completely mounted on the corrugated tube. When the corrugated tube diameter is changed, a base member having a curved portion corresponding to the changed tube diameter and a support member having a contact surface can be selected and applied.

FIGS. 6 and 7 show a spacer according to another embodiment of the present invention and a state in which the spacer is applied to a protector. In this embodiment, the spacer 50
Is provided in Example and substantially the same shape of FIG. 1, a substantially rectangular plate and a pair of spacer strips 50a _1, 50a ₂ having a half to and semicircular edge 50b. The pair of spacer pieces 50a ₁ and 50a ₂ are inserted into the protector 60 following the corrugated tube 11 penetrating into the protector 60, and the corrugated tube 11 is inserted into the protector 60.
One of the spacer pieces 50a ₁ for locking the can, thereby projecting a pair of locking projections 51 on the plate surface.

In the protector 60, a main body 61 having a substantially square cross section is integrally formed of a synthetic resin material such as polypropylene, and the corrugated tube 11 covering the wire harness 10 is provided so as to penetrate into the main body 61. ing. In the protector 60, a pair of engaging grooves 63 are formed in the side walls 62 facing each other in the vicinity of the end 61a near the opening of the main body 61 through which the wire harness 10 is guided. Further, the end portion 61a
Is formed with an engagement hole 64 communicating with the engagement groove 63. Note that, in this embodiment, the cover integrated with the protector is not provided.

Next, the procedure for fixing the corrugated tube by the spacer will be described. This fixing procedure is performed by the spacer 5 forming an opening corresponding to the corrugated tube 11.
After insertion 0 one spacer piece 50a ₂ of the engagement groove 63, penetrating a wire harness 10 that is covered with the corrugated tube 11 into the body 61. At that time, the circumferential direction of the plurality of grooves 11b of the spacer piece 50a ₂ of semicircular edge 50b ₂ of the corrugated tube 11 (see FIG. 2)
It is arranged so as to engage with. Furthermore, the spacer 50 is similar to another spacer pieces 50a ₁ comes first spacer pieces 50a _2, the engaging its semicircular edge 50b ₁ is as to engage the groove 11b of the corrugated tube 11 groove 63
And is brought into contact with the outer periphery of the corrugated tube 11. At this time, the locking projections 51 are
To prevent the spacer 50 from disengaging from the main body 61. Finally, the protector 60 in which the wire harness 10 is housed is tape-wrapped 65 around its peripheral surface to prevent the wire harness 10 from being exposed.

When the spacer 50 is to be detached from the protector 60, the engagement between the hole 64 and the projection 51 is released by pressing the top of the locking projection 51 from the engagement hole 64. be able to. With the configuration as in the present embodiment, the protector can have a simplified structure, and the position can be regulated by fitting the spacer into the engagement groove, so that the wire harness can be firmly fixed.
Further, since the protector eliminates the exposure of the wire harness by tape winding, the protector can easily cope with the change of the branch point of the wire harness, and high versatility can be obtained.

In each of the above embodiments, the protector has been described with respect to the case where the pair of engagement grooves hold one spacer. However, the protector has a structure in which a plurality of engagement grooves are provided and each engagement groove holds the spacer. In addition, the corrugated tube can be more firmly fixed.

[0026]

[Effects of the Invention] As described above, according to the corrugated tube fixing structure of the present invention, the protector can cope with a change in the corrugated tube diameter only by selecting a predetermined spacer, thereby reducing the number of members and being convenient. The performance is improved. In addition, the spacer is held by the engaging groove of the protector and the position is regulated by the engaging groove by the cover or the engaging means, so that the corrugated tube can be firmly fixed.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view illustrating a corrugated tube fixing structure of a protector according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the corrugated tube fixing structure of FIG.

FIG. 3 is a perspective view showing a modified example of a spacer applied to the present invention.

FIG. 4 is a perspective view showing another modification of the spacer applied to the present invention.

FIG. 5 is a front view in which a part of the spacer of FIG. 4 is cut away.

FIG. 6 is a perspective view of a spacer applied to another embodiment of the present invention.

FIG. 7 is a perspective view illustrating a corrugated tube fixing structure according to another embodiment to which the spacer of FIG. 6 is applied.

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

FIG. 9 is an exploded perspective view showing a branching tool having a conventional structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Wire harness 11 Corrugated tube 12 Spacer 13 Protector 15 Main body 16 Cover 17 Short wall 18 Side wall 19, 20 Partition wall 21 Engaging groove 22 Locking opening 23 Locking projection 30 Spacer 31 Opening 32 Slit 40 Spacer 41 Base member 41a Bending portion 41b Hollow region 41c Gear 42 Support member 42a Leg piece 42b Contact surface 42c Gear 50 Spacer 51 Locking projection 60 Protector 63 Engagement groove 64 Engagement hole

Claims (1)

(57) [Scope of request for utility model registration] 1. A said corrugated tube fixing structure of the protector to allow penetration of the coated wire harness in the corrugated tube, at least on an end portion, different have an edge which engages in a groove of the corrugated tube
Spacers that are selectively exchanged according to the size of the corrugated tube diameter and engagement grooves that hold and regulate the position of the spacers
Col <br/> gate tube fixing structure of the protector, wherein the benzalkonium have bets is provided.