JP2002095144A - Linear body fixing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a linear body fixing apparatus which can surely fix a linear body such as a lead wire. SOLUTION: A U-shape slit 36 is formed to a body portion 31 of a bush 3 engaged with a fitting hole 22. Consequently, an open-side type displacing portion 37 can be formed. At the end portion of the displacing portion 37, a projecting portion 37a is formed. This projecting portion 37a is projected to the external side from the external circumferential surface of the body portion 31. When the body portion 31 is inserted to the fitting hole 22, the projecting portion 37a is pushed toward the internal side of the bush 3 with the internal circumferential surface of the fitting hole 22, and the end portion as the free end of the displacing portion 37 is displaced to the internal side of the bush 3. The lead wire 1 inserted into the bush 3 is pressed and fixed with the end portion of the displacing portion 37.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire fixing device for fixing a lead wire, a wire harness in which the lead wires are bundled, and other linear materials.

[0002]

2. Description of the Related Art Generally, a compressor of a vehicle air conditioner is provided with an electromagnetic clutch for turning the compressor on and off, and a lead wire is connected to a solenoid of the electromagnetic clutch. If the lead wire is loose, the lead wire may come into contact with a pulley that rotationally drives the compressor and break. Therefore, the lead wire is fixed to the housing of the compressor using a fixing device to prevent the lead wire between the solenoid and the fixing portion from being loosened.

Conventionally, as this type of fixing device, a fixing device using a bush has been employed. In this fixing device, a mounting hole is formed in a housing of a compressor, a lead wire is inserted through the mounting hole, and a lead wire is inserted through a through hole of a bush. In this state, the lead wire is fixed to the housing by inserting and fixing the bush into the mounting hole.

[0004]

In the above-mentioned conventional fixing device, the fixing strength of the lead wire is weak, and the lead wire moves from the fixing portion to the solenoid side by the vibration of the vehicle and the compressor, and the portion on the solenoid side is moved. There was a problem of loosening gradually. Further, since the bush has a cylindrical shape, the lead wire must be inserted through the bush before wiring. For this reason, there was a problem that it was difficult to wire the lead wires.

[0005]

SUMMARY OF THE INVENTION The first invention has been made to solve the former problem, in which a fixing object to which a linear body is to be fixed is provided with a mounting hole, and a cylindrical shape is formed. A linear body is inserted into the through hole of the bush to be formed, and the bush is inserted and fixed in the mounting hole, so that the linear body is fixed to the object to be fixed. The bush is provided on the peripheral wall so as to be displaceable in the radial direction of the bush, and when the bush is inserted into the mounting hole, the outer surface is pressed inward in the direction of the bush diameter by the inner peripheral surface of the mounting hole. Accordingly, a displacement portion is provided in which an inner surface facing the through hole abuts against the linear body and is fixed. In this case, by forming a substantially U-shaped slit in the peripheral wall of the bush, the base end is integrally connected to the peripheral wall of the bush, and the distal end is elastically moved in the radial direction of the bush. The displacement portion is formed as a cantilever that can be displaced, and the outer surface of the distal end portion of the displacement portion protrudes from the outer peripheral surface of the bush to the outside, and when the bush is inserted into the mounting hole, the inside of the mounting hole is formed. It is preferable that a projection is formed, which abuts on the peripheral surface and displaces the distal end of the displacement portion radially inward of the bush. It is preferable that an engagement projection is formed on an inner surface of the displacement portion facing the inside of the through hole so as to abut and fix the linear body when the displacement portion is displaced radially inward of the bush. . It is preferable that the engaging projection is formed such that the fixing strength of the linear body in the longitudinal direction is different between one direction and another direction. It is desirable to form a slit on the bush that extends from the outer peripheral surface to the inner peripheral surface of the through hole and extends from one end to the other end in the axial direction.

A second invention has been made to solve the latter problem. An attachment hole is provided in an object to which a linear body is to be fixed, and a through hole of a cylindrical bush is provided. In a linear body fixing device in which the linear body is inserted and the bush is inserted and fixed in the mounting hole, the linear body is fixed to the fixed object. A slit extending from one end to the other end in the axial direction of the slit extending from the first through the inner peripheral surface of the through hole to the inner peripheral surface of the through hole. The linear body can be inserted into the through hole through the slit. And In this case, the outer diameter of a portion of the bush that is inserted and fixed in the mounting hole is made larger than the inner diameter of the mounting hole, and the bush is reduced in diameter when the bush is inserted into the mounting hole, so that the penetration is reduced. It is preferable that the inner peripheral surface of the hole is brought into pressure contact with the outer peripheral surface of the linear body. This point is preferably applied to the first invention.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. First, FIGS.
An embodiment of the first invention shown in FIG. In the fixing device for a linear body according to this embodiment, a covered lead wire (linear body) 1 for connecting a solenoid of a compressor of a vehicle air conditioner and a control device is connected to a housing (fixed object) 2 of the compressor. The housing 2 is provided with a protrusion 21 for fixing. The protruding portion 21 is formed with a mounting hole 22 having a circular cross section penetrating from the one end surface 21a to the other end surface 21b. Also,
The projecting portion 21 is formed with a slot 23 extending from the upper end surface 21 c to the inner peripheral surface of the mounting hole 22 and crossing the projecting portion 21 along the mounting hole 22. The slot 23 has such a width that the lead wire 1 can be inserted into the mounting hole 22 therefrom. Therefore, the lead wire 1 can be inserted into the mounting hole 22 after the wiring is completed, that is, after both ends of the lead wire 1 are connected to the solenoid and the control device. In the case where wiring is performed after the lead wire 1 is inserted into the mounting hole 22, the slot 23 is unnecessary.

A bush 3 is used to fix the lead wire 1 to the housing 2 using the mounting hole 22. The bush 3 is formed by molding a resin. A body 31 is formed at a central portion in the axial direction, and a flange is provided at one end (a lower end in FIG. 1; hereinafter, referred to as a front end). The part 32 is formed, and the other end (hereinafter, referred to as
It is called the rear end. ) Has a flange portion 33 formed therein. The body 31 has a circular cross section, an outer diameter substantially equal to the inner diameter of the mounting hole 22, and a length substantially equal to the width of the protrusion 21 (the dimension of the mounting hole 22 in the axial direction). Therefore, the body 31 can be inserted into the mounting hole 22.

The flange 32 has a disk shape slightly larger in diameter than the body 31 and is formed concentrically with the body 31. A guide portion 32a that is tapered from the rear end toward the front end is formed at the front end of the flange portion 32. The outer diameter of the distal end portion of the guide portion 32a is slightly smaller than the inner diameter of the mounting hole 22.

A plurality of slits 34 are formed at the distal end of the bush 3 at equal intervals in the circumferential direction. Each slit 34 extends from the outer peripheral surface of the bush 3 to the inner peripheral surface of a through hole 35 described later, and extends from the distal end surface of the bush 3 to the body 31. By forming the slit 34, the distal end portion of the bush 3 can be elastically reduced in diameter to such an extent that the guide portion 32 a and the flange portion 32 can be inserted through the mounting hole 22. Therefore, when the bush 3 is pushed from the rear end side to the front end side with the distal end of the guide portion 32a inserted into the mounting hole 22, the guide portion 32a
And the flange portion 32 is reduced in diameter and passes through the mounting hole 22. When the guide portion 32a and the flange portion 32 pass through the mounting hole 22, the entire body 31 fits into the mounting hole 22.
Moreover, the flange portion 32 is connected to the one end surface 21a of the protrusion 21.
(Or the other end surface 21b). As a result, the bush 3 cannot be pulled out from the mounting hole 22 from the front end side to the rear end side. However, the bush 3 can be removed from the mounting hole 22 by reducing the diameter of the guide portion 32a and / or the flange portion 32.

The flange portion 33 has a disk shape slightly larger in diameter than the flange portion 32 and is formed concentrically with the body portion 31 and the flange portion 32. The flange 33 may have the same diameter as the flange 32. The flange portion 33 includes the trunk portion 31.
When it is inserted into the mounting hole 22, it abuts on one end surface 21 a or the other end surface 21 b of the protruding portion 21. As a result, the bush 3 is moved from the rear end side toward the front end side to the mounting hole 22.
To prevent them from getting out. Thus, the bush 3 is fitted and fixed in the mounting hole 22 by the flange portions 32 and 33 abutting on the end surfaces 21 a and 21 b of the protruding portion 21. Note that a part of the flange portion 33 is cut out, but this is due to design reasons and may be formed in a disk shape.

A through hole 35 having a circular cross section is formed in the center of the bush 3 so as to penetrate the axis from the front end surface to the rear end surface. The through hole 35 has a large diameter portion 35a on the flange portion 32 side and a small diameter portion 35b on the flange portion 33 side. The large-diameter portion 35a has substantially the same length as the slit 34. By forming the large-diameter portion 35a, the tip end of the bush 3 in which the slit 34 is formed is made thin, and it is easily enlarged and reduced. The diameter can be adjusted. On the other hand, the small diameter portion 35b is such that the lead wire 1 inserted therein is fixed by a displacement portion 37 described later, and the inner diameter of the small diameter portion 35b is such that the lead wire 35 can be easily inserted into the small diameter portion 35b. Lead 1 to be able to
The diameter is slightly larger than the outside diameter.

The trunk portion 31 extends from the end on the flange portion 33 side to the substantially central portion of the trunk portion 31 along the axis, extends in the circumferential direction from there, further extends to the flange portion 33, and as a whole, A slit 36 having a letter shape is formed. The slit 36 extends from the outer peripheral surface of the body 3 to the small diameter portion 3.
The portion reaching the inner peripheral surface of 5b and surrounded by the slit 36 is the displacement portion 31. The displacement part 37 is
It has a cantilever shape, its base end is connected to the flange 33, and its tip (lower end) is a free end. The free end is rotatable about the base end so as to be displaced in the radial direction of the bush 3. Slit 36 and displacement part 37
Are formed at equal intervals in the circumferential direction of the body 31 (two sets in this embodiment). Of course, only one set may be formed.

A projection 37a is formed on the outer surface of the free end of the displacement portion 37. The protruding portion 37 a protrudes from the outer peripheral surface of the body 31 in a natural state in which no external force acts on the displacement portion 37. Therefore, the body 31 is attached to the mounting hole 2.
2, the free end of the displacement portion 37 is displaced toward the inside of the bush 3 by the amount of the protrusion 37 a protruding from the body 31. An inclined surface 37 b is formed at the distal end of the protruding portion 37 so as to be inclined radially inward of the bush 3 from the rear end to the distal end. The tip of the inclined surface 37b is located slightly inside the outer peripheral surface of the body 31. Therefore, the body 31 is attached to the mounting hole 2.
2, the tip of the displacement portion 37 is displaced inward of the body 31 by the inclined surface 37 b until the protrusion 37 a enters the inside of the mounting hole 22.

The inner surface of the displacement portion 37 forms a part of the small-diameter portion 35b of the through hole 35. At the tip (free end) of the inner surface, the inner surface protrudes toward the center of the through hole 35. An engagement protrusion 37c is formed. The height of the engagement protrusion 37c is determined by the engagement protrusions 37c, 37 of the two displacement portions 37, 37.
The interval c is set to be larger than the outer diameter of the lead wire 1. Therefore, the engagement protrusion 37c is
There is no hindrance when inserting the lead wire 1 into 5b. Further, when the protruding portion 37a is pushed by the inner peripheral surface of the mounting hole 22 and the free end of the displacement portion 37 is displaced inside the small-diameter portion 35a, the engagement protrusion 37c, as shown in FIG. The height is set so that the two engagement protrusions 37c, 37c sandwich the lead wire 1. Particularly, in the case of this embodiment, since the lead wire 1 is a covered wire composed of a metal wire and a resinous sheath covering the metal wire, the engagement protrusion 37c
Will bite into the lead wire 1. Thus, the lead wire 1 is fixed.

As shown in FIG. 4, the engagement protrusion 37c has a front side surface 37d and a rear end side surface 37e. The side surface 37d on the distal end side is formed as a surface substantially orthogonal to the axis of the bush 3. On the other hand, the rear side surface 37
e is a gently inclined surface whose angle with the axis of the bush 3 is extremely small. Therefore, the engagement protrusion 37c
Is strong when the lead wire 1 is prevented from moving from the front end side to the rear end side of the bush 3, but the lead wire 1 is secured from the rear end side of the bush 3 to the front end side. It is relatively small when trying to move to.

Next, a case where the covered lead wire 1 is fixed to the housing 2 by using the fixing device having the above-described structure will be described. First, as shown in FIG.
And through the through hole 35. In this case, the bush 3 can be inserted from the side surface 21b side of the mounting hole 22 if the portion of the lead wire 1 on the opposite side (the side surface 21b side) in FIG. Thus, the bush 3 is disposed such that the tip thereof faces the side surface 21b.

Next, the bush 3 is inserted into the mounting hole 22 from its tip (guide portion 32a). When the entire body 31 fits into the mounting hole 22, the flanges 32 and 33 abut against the side surfaces 21 a and 21 b of the protrusion 21, respectively. As a result, the bush 3 is fixed to the housing 2. Also,
When the body 31 is fitted in the mounting hole 22, the displacement portion 3
The free ends of the wires 37 are displaced radially inward of the bush 3, and the engagement protrusions 37c hold the lead wire 1. As a result, the lead wire 1 is fixed to the bush 3,
Eventually, it is fixed to the housing 2. The bush 3 fixed to the housing 2 can be extracted from the mounting hole 22 by reducing the diameter of the flange 32.

Of the lead wires 1 fixed to the housing 2, the other side from the bush 3 (the side surface 21b in FIG. 1).
If there is a slack in the portion (on the other side), the lead wire 1 is pulled from the rear end side of the bush 3 toward the front end side. Then, since the side surface 37e of the engagement protrusion 37c has a gentle slope, if it is pulled relatively strongly, the lead wire 1 can be pulled toward the front side against the clamping resistance of the engagement protrusions 37c, 37c. . This makes it possible to remove the slack in the part of the lead wire 1 that should not be slack from the bush 3 on the other side. Moreover, the engagement protrusion 37
Since the side surface 37d of "c" is a surface substantially orthogonal to the axis of the bush 3, the lead wire 1 is reliably prevented from moving from the near side to the other side (from the side surface 21a to the side surface 21b). Therefore, it is possible to reliably prevent the portion of the lead wire 1 from the bush 3 on the other side from becoming loose. Particularly, in this embodiment, since the lead wire 1 is covered with the resin, the engagement protrusion 37b bites into the lead wire 1 as shown in FIG. Therefore, the side surface 21a of the lead wire 1
Movement from the side to the side surface 21b can be more reliably prevented.

FIGS. 5 and 6 show another example of the bush used in the fixing device of the present invention. In this bush 3 ', only one displacement portion 37 is provided. In the above embodiment, the other displacement part 37
At the location in the circumferential direction of the bush 3 'provided with a groove, a slot 38 extending vertically from the front end surface to the rear end surface of the bush 3' and extending from the outer surface of the bush 3 'to the inner peripheral surface of the through hole 35 is provided. Is formed. By forming the slot 38, the bush 3 'can elastically expand and contract in diameter. Conversely, by expanding and contracting the bush 3 ', the width of the slot 38 can be changed to be wider or narrower. The width of the slot 38 is smaller than the outer diameter of the lead wire 1 in a natural state where no external force acts on the bush 3. However, the slot 38 is formed by expanding the width of the lead wire 1 and deforming the lead wire 1 flat, for example, by deforming the lead wire 1 into an elliptical shape.
8 so that it can be inserted into the through hole 35. The slot 38 is opposed to the displacement portion 37,
Although it is arranged 180 ° apart from the displacement part 37 in the circumferential direction, it may be arranged 90 ° apart from the displacement part 37, and its position is arbitrary.

In the linear device fixing device using the bush 3 'having the above structure, the lead wire 1 can be inserted into the through hole 35 of the bush 3' after the wiring of the lead wire 1 is completed. It is not necessary to insert the lead wire 1 into the bush 3 'before wiring. Therefore, wiring of the lead wire 1 can be easily performed. Further, since the diameter of the bush 3 ′ is easily reduced, the bush 3 ′ fitted and fixed in the mounting hole 22 can be easily removed from the mounting hole 22. When the bush 3 'is used, the engagement protrusion 37c of the displacement portion 37 presses the lead wire 1 against the inner peripheral surface of the small-diameter portion 35b of the through hole 35. 1 and the frictional resistance between the lead wire 1 and the inner peripheral surface of the small diameter portion 35b fixes the lead wire 1.

It should be noted that the present invention is not limited to the above-described embodiment, and can be appropriately changed. For example, in the above-described embodiment, the displacement portion 37 is formed as a cantilever integrated with the bushes 3, 3 'by forming the "U" -shaped slit 36 in the body portion 31. The displacement portion 37 may be formed separately from the bushes 3, 3 '. In the bush 3 ′, the outer diameter of the body 31 is substantially the same as the inner diameter of the mounting hole 22. However, in a natural state where no external force acts on the bush 3 ′, the outer diameter of the body 1 is adjusted to the mounting hole 22. The diameter may be larger than the inner diameter of. Thus, when the trunk 31 is inserted into the mounting hole 22, the inside diameter of the small diameter portion 35 b is smaller than the outside diameter of the lead wire 1.
May be reduced in diameter. By doing so, the lead wire 1 can be fixed by the small diameter portion 35b. Therefore, in that case, the displacement part 37 is not necessarily required.

[0023]

As described above, according to the first aspect, an effect is obtained that the linear body can be securely fixed. Further, according to the second aspect, an effect is obtained that the linear body can be easily arranged.

[Brief description of the drawings]

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

FIG. 2 is a view showing a bush used in the embodiment, and FIG. 2 (A) is a front view thereof, FIG.
2B is a side view thereof, and FIGS. 2C and 2D are cross-sectional views taken along lines CC and DD of FIG. 2A, respectively.

3A and 3B are views showing the bush, FIG. 3A is a plan view thereof, and FIG. 3B is a bottom view thereof.

FIG. 4 is an enlarged view showing a fixing state of a lead wire according to the embodiment.

FIG. 5 is a view showing another example of the bush used in the fixing device of the present invention, wherein FIG. 5 (A) is a front view thereof, FIG. 5 (B) is a rear view thereof, FIG. (D) is sectional drawing which follows CC line | wire and DD line | wire of FIG.5 (A), respectively.

6A and 6B are views showing the bush, FIG. 6A is a plan view thereof, and FIG. 6B is a bottom view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lead wire (linear body) 2 Housing (fixed object) 3 Bush 3 'Bush 22 Mounting hole 35 Through hole 36 Slit 37 Displacement part 37a Projection 37c Engagement projection 38 Slotting

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H02G 3/04 B60R 16/02 623B 3/22 623D 3/38 H02G 3/26 H // B60R 16/02 623 F16L 3/12 G H02G 3/28 F (72) Inventor Norio Suzuki 39, Higashihara, Chiyo-ji, Onan-gun, Osato-gun, Saitama Prefecture Inside of Xexel Valeo Climate Control (72) Inventor Ryosuke Izawa Ryosuke Izawa, Esato-gun, Osato-gun, Saitama 39, Hachiwara, Chiyo-machi, Zexel Valeo Climate Control Co., Ltd. (72) Inventor Yuichi Imai 39, Higashihara, Chiyo-ji, Oji-gun, Osato-gun, Saitama F-term (reference) 3H023 AA04 AB01 AC75 AD04 AD24 AD54 3J022 DA11 EA16 EB02 EB14 EC 14 EC22 ED25 FB07 FB12 GA04 GA11 GB01 3J023 AA01 BA01 BB01 CA05 DA01 5G357 DA06 DB03 DC12 DD01 DD05 DD11 5G363 AA04 BA02 CA20 CB08 DA13 DC02

Claims (7)

[Claims] An attachment hole is provided in an object to be fixed to which a linear body is to be fixed, the linear body is inserted into a through hole of a cylindrical bush, and the bush is inserted and fixed in the mounting hole. Thereby, in the fixing device of the linear body configured to fix the linear body to the object to be fixed, the bush is provided on a peripheral wall portion of the bush so as to be displaceable in a radial direction of the bush, and the bush is provided in the mounting hole. In the inserted state, a displacement portion is provided in which the outer surface is pushed inward in the direction of the bush diameter by the inner peripheral surface of the mounting hole so that the inner surface facing the through hole abuts on the linear body and is fixed. A fixing device for a linear body. 2. A substantially U-shaped slit is formed in a peripheral wall portion of the bush, so that a base end portion is integrally connected to the peripheral wall portion of the bush, and a distal end portion is elastic in a radial direction of the bush. The displaceable portion is formed as a cantilever that can be displaced in a movable manner, and the outer surface of the distal end portion of the displaceable portion protrudes outward from the outer peripheral surface of the bush. 2. The fixing device for a linear body according to claim 1, wherein a projection is formed which abuts against an inner peripheral surface of the bush and displaces a distal end portion of the displacement portion radially inward of the bush. 3. An engagement projection is formed on an inner surface of the displacement portion facing the inside of the through-hole, the engagement protrusion abutting on the linear body when the displacement portion is displaced radially inward of the bush and fixed. The fixing device for a linear body according to claim 1 or 2, wherein: 4. The engagement projection according to claim 3, wherein the engagement projection is formed such that the fixing strength in the longitudinal direction of the linear body is different between one direction and another direction. For fixing linear bodies. 5. A slit formed in the bush from the outer peripheral surface to the inner peripheral surface of the through hole and extending from one end to the other end in the axial direction. A device for fixing a linear body according to the present invention. 6. An attachment hole is provided in an object to be fixed to which the linear body is to be fixed, the linear body is inserted into a through hole of a cylindrical bush, and the bush is inserted and fixed in the mounting hole. Thereby, in the fixing device for a linear body, which fixes the linear body to the object to be fixed, the bush extends from the outer peripheral surface to the inner peripheral surface of the through hole, and from one end in the axial direction. A fixing device for a linear body, wherein a slit extending to the other end is formed, and the linear body can be inserted into the through hole through the slit. 7. An outer diameter of a portion of the bush inserted and fixed in the mounting hole is made larger than an inner diameter of the mounting hole, and the bush is reduced in diameter when the bush is inserted into the mounting hole. 7. The fixing device for a linear body according to claim 5, wherein an inner peripheral surface of the through hole is brought into press contact with an outer peripheral surface of the linear body.