JP2010178480A - Corrugated tube for wire-harness exterior - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent protrusion of an electric wire from a split end of a slit of a corrugated tube. <P>SOLUTION: A cover 10 is provided so as to be inserted into a slit formed along in the length direction of a corrugated tube. The cover includes a double-folded slit insert 11 in which tips of both sides are connected to each other, and a pair of right and left flanges 12, 13 respectively protruded from each of the other ends of both sides of the slit insert. The double-folded both sides of the slit insert are made as symmetrical locking parts 14, 15 respectively bent into a V-shape in a circumferential direction separating from each other. The outer peripheral slope of each locking part on both sides is abutted with the inner surface side of a trough of each split part on both sides across the slit while the flanges are abutted with the outer periphery of a crest of each split part on both sides, thereby holding the split parts across the slit from the inner periphery and the outer periphery so as to mount the cover over the slit. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a corrugated tube that is externally mounted on a wire harness that is routed in an automobile, and more specifically, in a corrugated tube having a slit for inserting a wire harness along an axial direction, the slit opening is prevented without tape winding. is there.

Wire harnesses that are routed in automobiles may be inserted into corrugated tubes made of resin molded products in order to focus the group of wires that make up the wire harness and protect the outer members located around the wire. Many.
The corrugated tube is provided with alternating crests and troughs in the circumferential direction in the length direction, so it has excellent flexibility, and according to the skill of the operator compared to the case where the wire group is bundled with tape. There is no difference in quality, and there is an advantage that the electric wire group can be bundled in a relatively short time.
The corrugated tube is provided with a slit 101 extending along the axial direction of the corrugated tube 100, as shown in FIG. (From the direction perpendicular to the axis)

  Thus, since the corrugated tube is provided with the slit 101 in order to allow the electric wire group to be laterally inserted, in the region where the wire harness is bent and routed, when the slit is positioned on the outer periphery of the bent portion, There is a problem that the slit opens and the electric wire easily protrudes from the slit. In addition, the split ends 101a and 101b sandwiching the slit 101 may rub against each other due to vehicle running vibration or the like, and an abnormal noise may be generated.

  For this reason, it is common to prevent the opening of the slit 101 by winding an adhesive tape around the corrugated tube, but this requires a tape winding operation, which increases the number of work steps and half-wraps the tape. If the opening of the slit is to be prevented with certainty, there is a problem that the flexibility of the corrugated tube is impaired.

In order to solve the above problem, Japanese Patent Application Laid-Open No. 2001-37041 proposes a long spacer 110 that is inserted into the slit 101 of the corrugated tube 100 over the entire length as shown in FIGS. .
The spacer 110 has left and right arms 110b and 110c projecting from both ends of a U-shaped main body 110a inserted along the axial direction in the slit 101, and hooks 110d and 110e are provided at the ends of the arms. Yes. On the other hand, V-shaped locking grooves 102 and 103 are cut in the corrugated tube 100 in parallel along both sides of the slit 101. Note that it is unclear whether the locking grooves 102 and 103 are provided in the peak portion (annular convex portion) 105 or the valley portion (annular concave portion) of the corrugated tube. Is recognized.
The main body portion 110a of the spacer 110 is inserted, and the hook portions 110d and 110e of the arm portions on both sides are pushed into the locking grooves 102 and 103 of the corrugated tube 100, respectively, and the mouth of the slit 101 is closed.

JP 2001-37041 A

When the spacer 110 shown in FIG. 7 is used, the spacer 110 is inserted from one end in the longitudinal direction of the corrugated tube 100 and the arm portions 110b and 110c are brought into contact with the upper surface of the peak portion 105 of the corrugated tube 100 to be inserted by sliding. There are problems that are necessary and difficult to work with.
And it is necessary to make it the special shape which provided the latching grooves 102 and 103 in the corrugated tube, and there exists a problem which cannot use the corrugated tube generally used.

  The present invention has been made in view of the above problems, and does not require tape around the periphery of the corrugated tube, and it is not necessary to make the corrugated tube similar to Patent Document 1 into a special shape. The challenge is to prevent opening.

In order to solve the above-mentioned problems, the present invention provides a corrugated structure comprising a resin molded product in which annular ridges and valleys are alternately provided in the length direction and one slit is provided in the entire length in the length direction. In the tube
A cover to be inserted into the slit is provided, and the cover has a pair of left and right ridges protruding from the other ends of the side portions of the slit insertion portion, and a bi-fold slit insertion portion in which the tips of both side portions are continuous. Part
Both sides of the half-folded portion of the slit insertion portion are left and right symmetrical locking portions bent in a V shape in the circumferential direction away from each other, and the outer peripheral inclined portions of the locking portions on both sides sandwich the slit. The slits are brought into contact with the inner surface side of the valleys of the divided parts on both sides, and the slits are held from the inner and outer circumferences by bringing the flanges into contact with the outer peripheral surfaces of the crests of the divided parts on both sides. A corrugated tube for exterior of a wire harness, characterized in that a cover is attached to the wire harness.

  As described above, in the cover used in the present invention, when both side locking portions of the slit insertion portion are brought into contact with the inner peripheral surface of the valley portion of the corrugated tube, both side locking portions are bent into a V shape. The repulsive force to the outside is generated with respect to the inner peripheral surface of the valley portion of the corrugated tube. On the other hand, on the outer peripheral side of the corrugated tube, the collar part is in contact with the outer periphery of the peak part, so that the split parts on both sides of the slit of the corrugated tube are formed on the inner and outer locking parts and the outer peripheral side collar part. It can be firmly held from the periphery.

Moreover, the cover of this invention can block | close a slit and can be reliably attached only by inserting a slit insertion part into the slit of a corrugated tube from the outer periphery of a corrugated tube.
Therefore, unlike Patent Document 1, it is not necessary to slide the cover from one end in the length direction of the corrugated tube, and it is only necessary to push the slit insertion portion of the cover into the slit from the outer peripheral side of the corrugated tube. Mounting workability can be improved.
Furthermore, the corrugated tube does not need to have a special shape provided with a locking recess, and a widely used corrugated tube can be used.
Furthermore, since the cover used in the present invention can be mounted irrespective of the pitch of the corrugated tubes, it can be used for a plurality of types of corrugated tubes having different pitches of the corrugated tubes. And it can use even if the diameter of a corrugated tube differs, and a cover can be made into a common item with respect to multiple types of corrugated tubes.

Furthermore, when the wire harness covered with the corrugated tube is bent and routed, when the slit is positioned on the outer peripheral side, the slit is opened and the split portions on both sides move away. In this case, since the slit insertion portion of the cover is folded in two, both side portions of the slit insertion portion can open from the connecting portion and follow the movement of the divided portion of the corrugated tube. On the contrary, even when the slit is located on the inner peripheral side and the divided portions on both sides are close to each other, the both side portions of the slit insertion portion come into contact with each other and become narrower so that the movement of the divided portion can be followed.
In this way, even if the width of the slit becomes wider or narrower, the slit insertion portion of the cover follows and expands and contracts, and the slit insertion portion is interposed between the slits so that the slit can always be closed. . Therefore, it can prevent that an electric wire protrudes from a slit, and can also prevent that the split ends of both sides of a slit contact and noise is generated.

  The cover of the present invention is made of resin, rubber, or elastomer.

The thickness of the cover is 0.3 to 1.0 mm, the height of the slit insertion part is 0.5 mm to 5.0 mm, and the flanges on both sides are arc-shaped along the arc of the peak of the corrugated tube. It is preferable that the protruding dimension is 2 mm to 5 mm.
Thus, since the thickness of the cover is reduced, the opening of the slit at the cover mounting portion can be reduced. Therefore, even if the cover is provided only in the curved region without providing the cover over the entire length of the corrugated tube, it is possible to prevent the opening of the slit in the portion where the cover is not attached from occurring.

Preferably, the cover is formed as a continuous material, and the continuous material is cut and used in accordance with the attachment length to the corrugated tube.
Thus, when the cover is provided as a continuous material, the cover can be cut to an appropriate length according to the attachment length to the corrugated tube, and the usability is improved.

  The cover may be attached to the entire length of the corrugated tube, or may be attached only to a curved portion where opening of the slit is likely to occur. In the present invention, since it can be attached by simply pushing the slit insertion portion of the cover into the slit from the outer periphery of the corrugated tube instead of from one end in the longitudinal direction of the corrugated tube, in particular, the corrugated tube is partially positioned at the intermediate position in the longitudinal direction. The cover can be easily attached.

As described above, in the present invention, the cover to be inserted into the slit of the corrugated tube is configured so that the divided portions on both sides of the slit can be sandwiched between the inner peripheral side and the outer peripheral side. A cover can be attached. Thus, since the cover is securely held by the corrugated tube in the mounted state, it is not necessary to wind the tape to prevent the cover from falling off, and the tape winding can be eliminated.
In addition, the cover does not need to be attached by sliding in the axial direction from one end side of the corrugated tube in the longitudinal direction, and since it is pushed in from the outer periphery of the corrugated tube, various advantages such as being easily mounted at an arbitrary position of the corrugated tube Have

It is a disassembled perspective view of embodiment of this invention. (A) is sectional drawing of a cover, (B) is sectional drawing of the state which attached the cover to the corrugated tube. (A) is a perspective view which shows the state which inserts an electric wire group in a corrugated tube, (B) is a perspective view which shows the state which attaches a cover to a corrugated tube. (A) is a schematic front view which shows the corrugated tube routed to a vehicle, (B) is principal part sectional drawing. It is a front view which shows a modification. It is a front view which shows a general purpose corrugated tube. (A) (B) is drawing which shows a prior art example.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
An electric wire group W routed in an automobile is covered with a corrugated tube 1 made of a resin molded product, and a cover 10 is attached to a slit 2 of the corrugated tube 1.
The corrugated tube 1 is a general-purpose product made of a resin molded product that has been conventionally used. The corrugated tube 1 is provided with annular crests 3 and troughs 4 alternately in the length direction L, and 1 in the total length in the length direction. The slit 2 of the book is provided. The both side parts divided by the slit 2 are hereinafter referred to as both side divided parts 5 and 6.

The cover 10 is made of a continuous material having the shape shown in FIGS. 1 and 2, and is cut and used according to the length attached to the corrugated tube 1.
The cover 10 is formed of resin, rubber or elastomer, and the present invention is a resin molded product.

The cover 10 includes a slit insertion portion 11 and a pair of left and right flange portions 12 and 13 protruding on both sides of the slit insertion portion 11, and the slit insertion portion 11 and the flange portions 12 and 13 are arranged in the length direction. It is aimed continuously.
The slit insertion portion 11 is folded in two, and both sides thereof are locking portions 14 and 15, and the inner ends of the locking portions 14 and 15 on both sides are continuous by the continuous portion 16, and are respectively separated from the outer end. The parts 12 and 13 project in the circumferential direction. The flanges 12 and 13 have an arc shape so as to follow the outer periphery of the corrugated tube 1.

  The locking portions 14 and 15 on both sides are bent in a V shape in a direction away from each other and in the circumferential direction in the same direction as the protruding direction of the flange portions 12 and 13, and the outer inclined surfaces 14a and 15a and the inner inclined surfaces 14b, The shape is provided with 15b.

  The locking portion 14 and the flange portion 12, and the locking portion 15 and the flange portion 13 are formed with the outer inclined surfaces 14 a and 15 a of the locking portions 14 and 15 in a state where the slit insertion portion 11 is inserted into the slit 2. The corrugated tube 10 is set so as to be in contact with the inner peripheral surface of the valley portion 4, and the flange portions 12 and 13 are set in contact with the outer peripheral surface of the peak portion 3.

  The thickness of the cover 10 is 0.3 to 1.0 mm, the height of the slit insertion part is 0.5 mm to 5.0 mm, and the flanges 12 and 13 on both sides are arcs of the peak 3 of the corrugated tube 1. The projecting dimension is preferably 2 mm to 5 mm.

As shown in FIG. 3 (A), the cover 10 is attached to the slit 2 of the corrugated tube 1 after the wire group W is inserted into the corrugated tube 1 with the slit 2 open, and then inserted in the direction of the wire group. It is mounted in the same manner as in Fig. 1, from the outer peripheral side in the direction perpendicular to the axis (radial direction) X.
As shown in FIG. 3B, the cover 10 is attached to the corrugated tube 1 partially in a region S that is curved when the wire harness W / H covered with the corrugated tube 1 is routed to the vehicle. ing. Therefore, when the cover 10 is installed only in this partly attached region with the slit 2 of the corrugated tube 1 placed sideways, the cover 10 is compared with the case where the cover is attached by sliding from one end side in the longitudinal direction of the corrugated tube 1. The attachment workability to the corrugated tube 1 is simple and can be performed in a short time.
In addition, when inserting along the full length of the corrugated tube 1, you may slide-insert from the end of the corrugated tube 1 in the length direction.

  When the slit insertion portion 11 of the cover 10 is inserted into the slit 2, the left and right symmetric locking portions 14 and 15 are included in the both side divided portions 5 and 6 divided by the slit 2 as shown in FIG. The continuous portion 16 protrudes into the corrugated tube 1. The flanges 12 and 13 projecting from the outer ends of the both side locking portions 14 and 15 of the slit insertion portion 11 are in contact with the outer peripheral surfaces of the both side split portions 5 and 6 of the corrugated tube 1.

  Specifically, the repulsive force of the outer inclined surfaces 14 a and 15 a of the locking portions 14 and 15 is pressed against the inner peripheral surface of the valley portion 4 of the corrugated tube 1 from the inside, and the inner surfaces of the flange portions 12 and 13 are Press contact with the top surface. Thereby, the trough 4 and the peak 3 on the split part 5 side of the corrugated tube 1 are strongly sandwiched between the locking part 14 and the flange 12 of the cover 10, and the trough 4 and the peak on the split part 6 side. The portion 3 is strongly held between the locking portion 15 of the cover 10 and the flange portion 13. Therefore, tape winding for attaching the cover 10 to the corrugated tube 1 with the cover 10 attached is not necessary.

  As shown in FIG. 4 (A), the corrugated tube 1 is inserted in the electric wire group W and the corrugated tube 1 to which the cover 10 is attached is routed in the automobile, and the corrugated tube 1 is curved. When positioned, the slit 2 of the corrugated tube 1 is easily opened. In this case, as shown in FIG. 4B, even if the split portions 5 and 6 on both sides sandwiching the slit 2 are opened, the both side locking portions 14 and 15 of the slit insertion portion 11 of the cover 10 are V-shaped angles. Is held in a state in which the divided portions 5 and 6 are sandwiched between the locking portion 14 and the flange portion 12 and between the locking portion 15 and the flange portion 13, and the opening of the slit 2 is not generated.

  Furthermore, even if the cover 10 of the present invention is different in pitch between the peaks and valleys of the corrugated tube 1 and the outer diameter of the corrugated tube 1, the slit insertion portion 11 is inserted into the slit of the corrugated tube 1, 6 can be firmly held between the locking portions 14 and 15 and the flange portions 12 and 13, so that a common part can be obtained.

In addition, as shown in FIG. 5, you may attach the cover 10 along the full length of the corrugated tube 1, In that case, it can prevent that the slit 2 opens over the full length of the corrugated tube 1, and an electric wire protrudes. And the division | segmentation end which pinches | interposes the slit 2 does not rub, and it can prevent that abnormal noise generate | occur | produces by rub.
Moreover, in the said embodiment, since the cover 10 is press-contacting to the inner periphery of the corrugated tube 1 using the repulsive force of the latching parts 14 and 15 made into the V shape of the slit insertion part 11, it is a hard resin with a repulsive force. However, it may be formed of elastic rubber or elastomer.

DESCRIPTION OF SYMBOLS 1 Corrugated tube 2 Slit 3 Mountain part 4 Valley part 5, 6 Both-sides division part 10 Cover 11 Slit insertion part 12, 13 Gutter part 14, 15 Locking part

Claims (3)

In the corrugated tube made of a resin molded product in which annular crests and troughs are alternately provided in the length direction and one slit is provided in the entire length in the length direction,
A cover to be inserted into the slit is provided, and the cover has a pair of left and right ridges protruding from the other ends of the side portions of the slit insertion portion, and a bi-fold slit insertion portion in which the tips of both side portions are continuous. Part
Both sides of the half-folded portion of the slit insertion portion are left and right symmetrical locking portions bent in a V shape in the circumferential direction away from each other, and the outer peripheral inclined portions of the locking portions on both sides sandwich the slit. The slits are brought into contact with the inner surface side of the valleys of the divided parts on both sides while the flanges are brought into contact with the outer peripheral surfaces of the crests of the divided parts on both sides so that the divided parts sandwiching the slits are sandwiched from the inner and outer circumferences. Corrugated tube for wire harness exterior, characterized in that a cover is attached to the wire harness.   The corrugated tube for wire harness exterior according to claim 1, wherein the cover is formed of resin, rubber, or elastomer, and the cover is attached to the corrugated tube without tape.   The corrugated tube for wire harness exterior according to claim 1 or 2, wherein the cover is formed as a continuous material, and the continuous material is cut in accordance with the length of attachment to the corrugated tube.

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