JPH0670425A - Structure and method for protecting wire harness and installation device to be used in the structure - Google Patents

Abstract

PURPOSE:To provide a protective structure of a wire harness by which a split slit of a corrugated tube can be prevented from opening while securing a flexibility. CONSTITUTION:An electric wire 15 of a wire harness 13 is coated with a corrugated tube 10 having a longitudinal split slit 11. Then, flexible C-shaped ring bodies 18 which prevent the opening of the slit are removably set in narrow recessed sections of the corrugated tube 10. The ring bodies 18 are installed at a small pitch at a place where the corrugated tube 10 bends or the wire harness 13 is branched. The ring bodies 18 are installed at a larger pitch at a place where the corrugated tube 10 is linear.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective structure for a wire harness arranged in an engine room of an automobile, a method therefor, and a mounting device used therefor.

[0002]

2. Description of the Related Art Conventionally, as a means for protecting electric wires of a wire harness arranged in an engine room, a corrugated tube having a bellows shape in which a large-diameter portion and a small-diameter portion are alternately arranged in series is often used. There is.

As shown in FIG. 14, this corrugated tube 1 is provided with a split slit 2 in the longitudinal direction. When covering each electric wire 4 of a wire harness 3, the split slit 2 of the corrugated tube 1 is expanded. The electric wire 4 is fitted over the electric wires 4.

In addition, in the wire harness 3 having a branch portion where a large number of electric wires 4 are branched, the branch electric wire 4
A corrugated tube 1 in which an insertion hole 5 of an appropriate size for insertion is formed in communication with the division slit 2 is used.

Reference numeral 6 is a connector.

When the wire harness 3 is installed in the engine room, the corrugated tube 1 is usually used.
Will be arranged in a bent shape. When the corrugated tube 1 is arranged in a bent shape in this way, the split slit 2 may open, and the electric wire 4 inside may be exposed or protruded. If there is the branch electric wire 4, the branch electric wire 4 May be displaced from the insertion hole 5, the branch electric wire 4 may protrude from the position of the division slit 2 on the side of the insertion hole 5, or the insertion hole 5 may be displaced in the longitudinal direction of the division slit 2.

Therefore, usually, after covering each wire 4 of the wire harness 3 with the corrugated tube 1, the outer circumference of the corrugated tube 1 is opened and half-wrapped with an adhesive tape 7 as a regulating member, as shown in FIG. Therefore, a method of restricting the opening of the split slit 2 has been adopted.

[0008]

However, since the outer circumference of the corrugated tube 1 is half-wrapped with the adhesive tape 7, the expansion and contraction of the interval between the large diameter parts of the corrugated tube 1 is restricted, so that the corrugated tube is expanded. The expansion and contraction of the corrugated tube 1 itself is hindered, and the flexibility of the corrugated tube 1 is difficult to obtain. Therefore, the flexibility of the wire harness 3 itself is lost, it is very difficult to bend, and the desired wiring state is not obtained, and other parts are not provided. However, there is a drawback that problems such as disconnection occur due to interference.

Further, the half-wrapping operation of the adhesive tape 7 is difficult to automate by a machine and requires manual labor, which is a troublesome and time-consuming operation.

Further, since the adhesive tape 7 is usually wound while being pulled, the glue on the adhesive surface of the adhesive tape 7 is softened by the heat in the engine room, and the end surface of the adhesive tape 7 is peeled off by the accumulated stress. There is also a drawback that dust and the like are attached and the appearance is not good.

Therefore, in view of the above problems, the present invention is capable of preventing the division slits of the corrugated tube from opening while ensuring flexibility, and a wire harness protective structure excellent in workability, its method, and its use. It is an object of the present invention to provide a mounting device that can be used.

[0012]

The technical means of the protective structure for achieving the above object is to protect the wire harness by covering the wires of the wire harness with a corrugated tube having a split slit in the longitudinal direction. In addition, in the protection structure of the wire harness in which the opening restricting member that restricts the opening of the split slit of the corrugated tube is mounted, the opening restricting member has elasticity to be removably fitted in the narrow groove portion of the corrugated tube. It has a C-shaped opening stop ring body.

Further, the technical means of the protection method is to cover the electric wire of the wire harness with a corrugated tube having slits in the longitudinal direction, and then attach an opening regulating member to the corrugated tube to mount the corrugated tube. In the method for protecting a wire harness that restricts the opening of split slits, the opening restricting member includes an elastic C-shaped opening stop ring body that is removably fitted into a small-diameter groove portion of the corrugated tube. The bending-arranged portion and the portion located at the branch portion of the wire harness are at the points where the opening stop ring body is attached at a pitch shorter than the pitch of the opening stop ring body attached to the linear arrangement portion of the corrugated tube. .

The technical means of the mounting device used for this is a C-shape having elasticity so as to restrict the opening of the division slit of the corrugated tube provided with the division slit in the longitudinal direction covering the electric wire of the wire harness. A ring body mounting device for removably fitting the opening prevention ring body into the small-diameter groove portion of the corrugated tube,
A base portion having a fitting recess at one end side in the longitudinal direction for guiding the corrugated tube into a fitting shape from the radial direction, and a separation portion of the opening preventing ring body facing the fitting recess side at a midway portion in the longitudinal direction of the base portion. A ring body supply mechanism for supplying the stop ring body and the stop ring body supplied from the ring body supply mechanism are abutted from the other end side in the longitudinal direction of the base portion to fit the stop ring body on the one end side. When the ring body pushing mechanism for pushing to the recessed position and the opening stop ring body is pushed to the fitting recessed position on the one end side by the ring body pushing mechanism, both ends of the opening stop ring body separated portion come into contact with each other. Slide guide, and at the fitting recess position, the separation part is expanded to a larger diameter than the corrugated tube so that the opening stopper ring body is supplied from the supply position to the fitting recess position to the side of the one end. Lies in gradually becomes provided with a flared guide wall portions of the pair of spaced.

[0015]

According to the wire harness protection structure of the present invention, since the opening preventing ring body is fitted in the small-diameter groove portion of the corrugated tube covering the electric wire of the wire harness, the elastic holding of the opening preventing ring body is achieved. The force effectively regulates the opening of the split slit.

Further, since the opening preventing ring body is fitted in the small-diameter groove portion of the corrugated tube, the flexibility of the corrugated tube is not impeded, and the flexibility of the corrugated tube can be effectively ensured. Therefore,
The flexibility of the wire harness itself can be secured, and good wiring conditions can be obtained.

Further, according to the wire harness protecting method of the present invention, the split slits are likely to open at the bent portion of the corrugated tube, but the opening preventing ring body is attached to the corrugated tube at a short pitch. For,
A larger opening restraining force is obtained by the elastic holding force of each opening prevention ring body, and the opening of the division slits in the bent portion of the corrugated tube can be effectively restrained.

Further, since there are many joints between the trunk line and the branch line in the part located at the branch part of the wire harness, the wire harness has a large diameter, and the split slits are apt to open. Since the body is attached to the corrugated tube at a short pitch, a larger opening regulation force can be obtained as in the above, and the opening of the split slit of the corrugated tube in the portion located at the branch portion of the wire harness can be effectively regulated.

On the other hand, in the linearly arranged portion of the corrugated tube, the opening action of the division slits does not occur so much, and even if the opening prevention ring body is attached to the corrugated tube at a relatively long pitch, no trouble occurs.

Further, according to the ring body mounting apparatus of the present invention, the ring body feeding mechanism is operated by fitting the opening preventing ring body mounting position of the corrugated tube into the fitting recess of the base portion and operating the ring body pushing mechanism. The opening prevention ring body supplied from is pushed to the fitting recessed position by the ring body pushing mechanism and pushed out. At this time, the separation part of the opening prevention ring body is pushed while being gradually expanded by the pair of expansion guide wall parts, and the separation part is expanded to a diameter larger than the corrugated tube at the fitting recess position, and the outer circumference of the corrugated tube is expanded. It is positioned on the side, and thereafter, it is separated from the base portion and returns to the original C shape by its elasticity, and is fitted into the narrow-diameter groove portion of the corrugated tube.

By repeating the above-mentioned operation at the required position of the corrugated tube, the corrugated tube having the opening preventing ring attached at the desired position can be obtained.

Therefore, the opening preventing ring body can be easily attached, and compared with the half-wrapping work of the adhesive tape,
Workability is dramatically improved.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a wire harness protection structure of the present invention will be described below with reference to the drawings. In FIG. 1 to FIG. 3, 10 is a corrugated tube, which is made of a flexible plastic molded tube as in the conventional case. , A large-diameter portion and a small-diameter portion are sequentially arranged alternately in a bellows shape. The corrugated tube 10 is formed with a division slit 11 and an insertion hole 12 of an appropriate size communicating with the division slit 11 in the longitudinal direction. Reference numeral 13 is a wire harness, which includes a large number of electric wires 15 from the main line portion 14.
Has a branch line portion 16 for branching.

The main line portion 1 of the wire harness 13
4, the corrugated tube 10 is covered, and each electric wire 15 of the branch line portion 16 is led out from the insertion hole 12.
A connector 17 is connected to the end of the branch line portion 16.

Reference numeral 18 denotes an opening stop ring body as an opening restricting member, which is made of an elastic synthetic resin such as polycarbonate or an elastic metal material such as steel, and has an annular portion notched as shown in FIG. It is configured in a C-shape formed in the shape of a circle. Further, the cross section of the stop ring body 18 is shown in FIG.
As shown in, the inner side is formed in a shape narrower than the outer side.

A plurality of opening prevention ring bodies 1 are provided on both sides of the insertion hole 12 of the corrugated tube 10 respectively.
8 are mounted on the outer peripheral portion of the corrugated tube 10 and also mounted on other portions of the corrugated tube 10 at an appropriate pitch. At this time, as shown in FIG. 3, the opening prevention ring body 18 is fitted and mounted in the small-diameter groove portion 19 of the corrugated tube 10 so as to be freely fitted and removed.

According to the structure of this embodiment, since the opening preventing ring body 18 is fitted in the small-diameter groove portion 19 of the corrugated tube 10, the elastic holding force of the opening preventing ring body 18 causes the division slit 11 to open. It can be regulated effectively.

Further, since the opening preventing ring body 18 is fitted in the small-diameter groove portion 18 of the corrugated tube 10, the flexibility of the corrugated tube 10 is not impeded by the stretchability of the bellows portion of the corrugated tube 10. Not blocked, as shown in FIG. 4, corrugated tube 1
The flexibility of 0 can be effectively secured. Therefore, the flexibility of the wire harness 13 itself can be ensured satisfactorily, and a desired wiring condition can be obtained even when the wire harness 13 is arranged in the engine room of an automobile.

Furthermore, since the C-shaped opening preventing ring body 18 is fitted in the small-diameter groove portion 19 of the corrugated tube 10, it does not project much from the outer periphery of the corrugated tube 10 and is effectively caught by other parts. Can be prevented.

Next, the procedure of the method for protecting the wire harness 13 will be described. The corrugated tube 10 is covered at the required positions of the wire harness 13 by using the division slits 11 of the corrugated tube 10. At this time, when the wire harness 13 has the branch line portion 16, the branch line portion 16 is positioned at the position of the insertion hole 12 of the corrugated tube 10, and the branch line portion 16 is inserted from the insertion hole 12.
Are arranged in an extended manner.

After that, as shown in FIG. 5, the opening preventing ring bodies 18 are attached to the portion of the corrugated tube 10 located at the linear arrangement portion 21 at a relatively long pitch, and the corrugated tube 10 is arranged in a bent shape. At the branch portion 23 located at the portion located at the portion 22 or the branch portion of the wire harness 13, the opening stop ring body 18 is arranged at a pitch shorter than the pitch of the opening stop ring body 18 mounted on the linear arrangement portion 21. Put on.

The mounting pitch of the opening stop ring body 18 may be determined as appropriate.

According to the method of this embodiment, the split slit 11 is likely to open at the bent portion 22 of the corrugated tube 10, but the opening preventing ring body 18 is attached to the corrugated tube 10 at a short pitch. Therefore, a larger opening restriction force can be obtained by the elastic holding force of each opening prevention ring body 18, and the opening of the split slit 11 in the bent-shaped disposition portion 22 of the corrugated tube 10 can be effectively restricted.

Further, the wire harness 13 having the branch line portion 16 is, as shown in FIG.
In the branch portion 23 located at the branch portion of 3, there are a large number of joint portions 25 between the electric wire 15 on the side of the main line portion 14 and the electric wire 15 on the side of the branch line portion 16, and the diameter of the main line portion 14 is increased by this joint portion 25. Since the diameter of the split slit 11 is increased, the opening slit ring bodies 18 are attached to the corrugated tube 10 at a short pitch as in the above case, so that a larger opening regulation force can be obtained and the branch portion of the wire harness can be obtained. Corrugated tube 10 in 23
The opening of the split slit 11 can be effectively regulated.

On the other hand, at the linearly arranged portion 21 of the corrugated tube 10, the opening action of the split slit 11 does not occur so much, and even if the opening preventing ring bodies 18 are mounted on the corrugated tube 10 at a relatively long pitch, nothing happens. No trouble will occur.

When mounting the opening stop ring body 18, it is necessary to install the opening stop ring body 18 so that the position of the split slit 11 of the corrugated tube 10 and the separated portion 18a of the opening stop ring body 18 are different in the circumferential direction.
It is more preferable from the viewpoint of the effect of preventing the opening. Further, the cross-sectional shape of the opening stop ring body 18 is not limited to the above-mentioned embodiment, and as shown in FIGS. 7 (A), (B), (C), and (D), a rectangular shape, a trapezoidal shape, and an ellipse shape. It may have a shape, a circular shape, or the like, as long as it can be easily fitted into the narrow groove portion 19.

Next, a ring body mounting device 30 for mounting the opening prevention ring body 18 on the corrugated tube 10 will be described with reference to FIGS. 8 to 13.

The ring body mounting device 30 includes a base portion 31 which is a rectangular flat plate-shaped block as a base body, and a ring body supply mechanism 32 which supplies the opening preventing ring body 18 from one side surface of the base portion 31 in the longitudinal direction. It is mainly configured by a ring body pushing mechanism 33 arranged on the other side surface side of the base portion 31.

A fitting recess 35 is formed at one end of the base portion 31 in the longitudinal direction so that the corrugated tube 10 can be fitted into the corrugated tube 10 in the radial direction.
Is located in the center of the base portion 31 in the width direction, and has a semi-arcuate fitting bottom portion 35a having a diameter substantially the same as or slightly larger than the outer diameter of the corrugated tube 10, and gradually extends in the one end direction from both end edges of the fitting bottom portion 35a. It is composed of a fitting guide portion 35b which is separated.

A circular hole 36 having a diameter slightly larger than the outer diameter of the stop ring body 18 is formed in the middle of the base portion 31 in the longitudinal direction. Further, a concave portion 37 is formed on the other side surface side of the base portion 31 so as to gradually expand from the position of the circular hole 36 to the one end edge in the longitudinal direction, and the concave portion 37 is formed in a substantially V shape. A ring body guide 38 made of a flat plate member is attached by screw fastening or the like.

Further, an elongated slide groove 39 extending from the position of the circular hole 36 to the other end in the longitudinal direction is formed on the other side surface side of the base portion 31, and this slide groove 39 is formed.
Is formed shallower than the recess 37. Further, when the ring body guide 38 is mounted, the bottom of the slide groove 39 and the other side surface side of the ring body guide 38 are arranged so as to be flush with each other.

As shown in FIG. 12, the ring body guide 38 has a fitting recess 40 having a shape corresponding to the fitting recess 35 at one end in the longitudinal direction, and in the mounted state, the fitting recess 35 of the base portion 31. It is configured so as to correspond to the superposed state. Further, between the both sides of the ring body guide 38 and the both sides of the recess 37, and the ring body guide 38.
A ring body passage 42 through which the opening preventing ring body 18 can pass is formed between the other end edge and the one end edge of the slide groove 39.

Further, a widening guide 45 is formed on the one side surface side of the ring body guide 38 through a step portion 44, and the widening guide 45 is located at the one end side of the circular hole 36 and the opening preventing ring body. A pair of positioning protrusions 46, into which the separated portions 18a of the eighteen are fitted, are disposed so as to be gradually separated from the position of the positioning protrusions 46 in the one end side direction, and extend outward on both sides of the fitting recess 40. The expansion guide wall portion 47 of FIG.

The ring body supply mechanism 32 includes the base portion 3
1, a ring body supply cylinder 51 attached to the pedestal portion 50 provided on one side surface side by screw fastening or the like, and a bottomed cylindrical push piston 52 inserted into the ring body supply cylinder 51 in a fitting manner. In order to close the open end of the ring body supply cylinder 51, and the biasing spring 54, which is held in the recess 53 of the push-in piston 52 and includes a coil spring that elastically biases the push-in piston 52 toward the base portion 31, And a lid 55 that is detachably screwed.

The diameter of the inner peripheral surface of the hole portion 51a of the ring body supply cylinder 51 is the same as that of the circular hole 36 having a diameter slightly larger than the outer diameter of the stop ring body 18, and the circular hole 3
6 are arranged concentrically with each other, and the separation portion 18a of the opening stop ring body 18 is guided to the side of the circular hole 36 toward the fitting recess 35 side.
The positioning guide piece 56 that guides the fitting into the hole 51a
Is arranged along the axial direction on the fitting recess 35 side.
The positioning guide piece 56 and the positioning protrusion 46 are arranged continuously. A groove portion 52a is formed on the outer peripheral surface of the pushing piston 52 to avoid interference with the positioning guide piece 56.

The axial center of the hole portion 51a of the ring body supply cylinder 51 and the circular hole 36 are inclined in the direction away from the fitting recess 35 with respect to the direction orthogonal to the longitudinal direction of the base portion 31. There is.

The ring body pushing mechanism 33 includes the base portion 3
1 is a rectangular lid plate body 60 having substantially the same shape as the other side surface of the base portion 31 and attached to the other side surface of the base portion 31 by screw fastening or the like.
A push-out plate 61 slidably fitted in the slide groove 39 along the longitudinal direction of the slide groove 39, and a fitting hole 61a in which a head 62a is formed in the push-out plate 61.
A guide pin 62 slidably fitted into a guide hole 60a that is long in the longitudinal direction of the slide groove 39 formed in the cover plate body 60, and the guide pin 6 and the guide pin 6
The second shaft portion 62b is provided with an operating rod 63 having a recess portion 63a into which the other side surface side protruding portion is fitted.

Reference numeral 64 denotes a retaining screw, which is screwed from both sides in the radial direction of the operating rod 63 to prevent the shaft portion 62b from coming out of the recess 63a. In addition, return springs 66 are respectively stretched between the projecting pins 65 and the retaining screws 64 that are provided on both sides of the one end side of the cover plate body 60.

Further, between the other side surface side of the ring body guide 38 and the inner surface side of the pushing plate 61, a passage through which the pushing plate 61 is slidable is secured.

The ring body mounting device 30 is constructed as described above, and the procedure for mounting the ring stopper 18 on the corrugated tube 10 will be described. As shown in FIG. An appropriate number of the separated portions 18a of the retaining ring body 18 are inserted into the positioning guide pieces 56 as a fitting shape. After that, the pushing piston 52 and the biasing spring 54 are sequentially inserted, and then the lid body 55 is attached.

Next, as shown in FIGS. 8 to 11, the corrugated tube 10 is guided into the fitting recess 35 from the radial direction thereof. In this state, as shown in FIG. 10, if the operating rod 63 is slid from the position shown by the phantom line to the position shown by the solid line, the push-out plate 61 will move from the position shown in FIG. 11, the stop ring body 18 is pushed by the urging force of the urging spring 54, and the separated portion 18a of the stop ring body 18 closest to the base portion 31 side is positioned here. The opening stop ring body 18 is extruded on the sliding locus of the extruding plate 61 at the other end side in the radial direction of the stop ring body 18.

In this state, if the gripping force of the operating rod 63 is released, the operating rod 63 is pulled back by the returning force of the return springs 66, as shown by the solid lines in FIGS. 8 and 9. At this time, the push-out plate 61 is slid along the slide groove 39 toward the fitting recess 35. When the push-out plate 61 slides, the end of the push-out plate 61 on the side of the fitting recess 35 comes into contact with the other end of the opening stop ring body 18, and pushes the opening stop ring body 18 toward the fitting recess 35.

When the opening stop ring body 18 is pushed, both ends of the separation portion 18a of the opening stop ring body 18 abut on the expansion guide wall portions 47, respectively, and gradually expand as shown by the phantom line in FIG. It is slid and guided while being expanded, and finally expanded to a diameter larger than the outer diameter of the corrugated tube 10 at the position of the fitting recess 35 and extruded from the ring passage 42, and due to its elasticity, returns to the original C shape and the corrugated. Tube 1
It is attached to 0. At this time, the opening prevention ring body 18 slides from the large-diameter portion of the corrugated tube 10 and is fitted into the small-diameter groove portion 19, and is held in a positioning state.

By repeating the above-mentioned operation at the required position of the corrugated tube 10, the opening preventing ring body 18 is moved to a desired position.
Thus, the corrugated tube 10 in which is mounted is obtained.

Therefore, the opening prevention ring body 18 is easily attached to the corrugated tube 10 by a one-touch operation in which the corrugated tube 10 is fitted into the fitting concave portion 35 of the ring body mounting device 30 and the operating rod 63 is reciprocally moved. As compared with the conventional half-wrapping work of the adhesive tape 7, the workability is dramatically improved and the work is simplified and mechanization is possible.

The ring body supply mechanism 32 supplies the opening preventing ring body 18 to the side of the base portion 31 so that the urging spring 5 is provided.
Although the structure based on the spring force of 4 is shown, it may be based on compressed air or the like. In addition, the stop ring body 18
Shows a structure in which separate ones are loaded into the ring body supply cylinder 51.
Are connected by a thin connecting piece, and the extrusion plate 61
When the stop ring body 18 is pushed during the sliding operation of
The structure may be such that the connecting piece is cut. Further, although the structure in which the operating rod 63 is returned by the return spring 66 is shown,
A manual operation method may be used.

[0057]

As described above, according to the wire harness protection structure of the present invention, the elastic C-shaped opening preventing ring body is fitted in the small-diameter groove portion of the corrugated tube. The elastic holding force of the body effectively regulates the opening of the split slit. Further, since the opening preventing ring body is fitted in the small-diameter groove portion of the corrugated tube, the flexibility of the corrugated tube is not impeded, and the flexibility of the corrugated tube can be effectively ensured. Therefore, the flexibility of the wire harness itself can be secured, and a good wiring condition can be obtained.

Further, according to the wire harness protecting method of the present invention, the bent stopper of the corrugated tube or the portion of the wire harness located at the branching portion is attached to the linear stopper of the corrugated tube. This is a method of mounting the opening stop ring body at a pitch shorter than the pitch of the ring body.Because the opening stop ring body is mounted at a short pitch in the part where the split slit of the corrugated tube is likely to open, each opening Due to the elastic holding force of the stop ring body, a larger opening restriction force can be obtained, and the opening of the split slit in the portion where the corrugated tube is likely to open can be effectively restricted.

On the other hand, at the linearly arranged portion of the corrugated tube, the opening action of the dividing slit does not occur so much, and even if the opening preventing ring body is attached to the corrugated tube at a relatively long pitch, the opening of the dividing slit is effective. Can be prevented.

Further, according to the ring body mounting device of the present invention, a base portion having a fitting recess at one end side in the longitudinal direction for guiding the corrugated tube into a fitting shape from the radial direction thereof,
A ring body supply mechanism for supplying the separation stop ring body with the separated portion of the separation stop ring body toward the fitting recessed part in the middle of the base portion in the longitudinal direction, and the stop ring body supplied from the ring body supply mechanism. A ring body pushing mechanism that abuts against the other end side in the longitudinal direction of the base portion to push the opening stop ring body to the fitting recessed position on the one end side; When pushed to the fitting recessed position on the side, both ends of the opening preventing ring separating portion are brought into contact with each other to be slid and guided, and at the fitting concave position, the separating portion should be expanded to a diameter larger than the corrugated tube. And a pair of expansion guide wall portions that are gradually separated in the one end side direction from the opening stop ring body supply position to the fitting recessed position, and the corrugated chute is provided in the fitting recessed portion of the base portion. When the ring body pushing mechanism is operated and the ring body pushing mechanism is operated, the opening prevention ring body fed from the ring body feeding mechanism is pushed to the fitting recessed position by the ring body pushing mechanism and pushed out, and the corrugated tube It has an advantage that it can be fitted into the small-diameter groove portion, the opening preventing ring body can be easily attached, and the workability is dramatically improved as compared with the half-wrap winding work of the adhesive tape.

[Brief description of drawings]

FIG. 1 is a perspective view of essential parts showing a protective structure for a wire harness according to the present invention.

FIG. 2 is a plan view of a stop ring body.

FIG. 3 is a sectional view of a main part of a wire harness.

FIG. 4 is a cross-sectional view of essential parts showing a bent state of the wire harness.

FIG. 5 is an explanatory diagram showing a state in which the opening prevention ring body of the wire harness is attached.

FIG. 6 is a cross-sectional view of a main part of a branched portion of the wire harness.

FIG. 7 is a cross-sectional view of essential parts showing another embodiment of the opening stop ring body.

FIG. 8 is a side view of the ring body mounting device.

FIG. 9 is a bottom view of FIG.

FIG. 10 is a sectional side view of the ring body mounting device.

11 is a cross-sectional view taken along the line XI-XI of FIG.

FIG. 12 is an exploded perspective view of a ring body mounting device.

13 is a view on arrow A in FIG.

FIG. 14 is a perspective view of relevant parts showing the wire harness in a state of being covered with a corrugated tube.

FIG. 15 is a cross-sectional view of an essential part showing a protective structure for a wire harness in a conventional example.

[Explanation of symbols]

 Reference Signs List 10 corrugated tube 11 split slit 13 wire harness 15 electric wire 16 branch line part 18 opening stop ring body 18a separation part 19 small-diameter groove part 21 linear installation site 22 bent installation site 23 branch site 30 ring assembly device 31 base part 32 ring body supply mechanism 33 ring body pushing mechanism 35 fitting recess 47 expansion guide wall

Claims (3)

[Claims] 1. In order to protect the wire harness, the electric wire of the wire harness is covered with a corrugated tube having a split slit in the longitudinal direction, and an opening restricting member for restricting the opening of the split slit of the corrugated tube is mounted. In the protective structure of the wire harness, the opening restricting member is composed of an elastic C-shaped opening stop ring body that is removably fitted into the small-diameter groove portion of the corrugated tube. Construction. 2. A wire for covering an electric wire of a wire harness with a corrugated tube having a split slit in a longitudinal direction, and then attaching an opening restricting member to the corrugated tube to restrict the opening of the split slit of the corrugated tube. In the method for protecting a harness, the opening restricting member comprises a C-shaped opening stop ring body having elasticity that is removably fitted into a small-diameter groove portion of the corrugated tube, and is provided in a bent portion of the corrugated tube or a wire harness. The method for protecting a wire harness, wherein the part located at the branching part is mounted with the opening stop ring body at a pitch shorter than the pitch of the opening stop ring body mounted on the linear arrangement part of the corrugated tube. 3. An elastic C for restricting the opening of the division slit of a corrugated tube provided with a division slit in the longitudinal direction for covering the electric wire of the wire harness.
A ring body mounting device for removably fitting a shape-preventing ring body into a small-diameter groove portion of a corrugated tube, wherein a fitting recess for guiding the corrugated tube from the radial direction into a fitting shape is formed at one end in the longitudinal direction. A base portion provided on the side, a ring body supply mechanism that supplies the separation stop ring body with the separated portion of the stop ring body toward the fitting recessed portion at a midway portion in the longitudinal direction of the base portion, and the ring body supply mechanism By a ring body pushing mechanism that abuts the supplied stop ring body from the other end side in the longitudinal direction of the base portion to push the open ring body to the fitting recess position on the one end side, and a ring body pushing mechanism. When the opening stop ring body is pushed to the fitting recess position on the one end side, both ends of the opening stop ring body separating portion come into contact with each other and are guided by sliding, and are separated at the fitting recess position. In order to widen the portion to a diameter larger than that of the corrugated tube, a pair of widening guide wall portions are provided, which extend from the opening stop ring body supply position to the fitting recessed position and are gradually separated in the one end side direction. Ring body mounting device.