JP2013247760A - Clamp for wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clamp applicable to various wire harnesses with outer coating of different diameters.SOLUTION: The clamp for wire harness has a pair of first and second half-cylindrical members, the one ends thereof are coupled being interposed by a hinge portion. The other end of the second half-cylindrical member is formed with an engagement projection. The other end of the first half-cylindrical member has plural locking claws for selectively engaging with the locking claws that are formed with a space from the front end in a circumference direction. The first half-cylindrical member or the second half-cylindrical member has a vehicle engagement part on the circumferential face thereof. The second half-cylindrical member has plural swelling parts of the same number of locking claws formed on the inner circumferential surface at intervals in the circumference direction. The swelling parts are configured so that the protruding amount increases away from the front end; and when the vertical size of the first and second half-cylindrical members is reduced by the locking claws engaging with the locking claw, the swelling parts having a large protruding amount come closer to a position opposing to the hinge portion.

Description

  The present invention relates to a clamp for a wire harness, and more particularly, to a clamp for a wire harness that locks a corrugated tube, a wire harness sheathed with a round tube, and a wire harness that is wound with a tape to a fixing member such as a vehicle body panel.

  Conventionally, this type of clamp has a configuration disclosed in, for example, a clamp for a corrugated tube described in Japanese Utility Model Laid-Open No. 2-34883, and hinges one end of a pair of semi-annular members obtained by dividing an annular member. In addition, the lock portion provided on one end of the other end after the wire harness or corrugated tube or the like is externally fitted with the pair of semi-annular members is locked to the locked portion provided on the other. Attached to the wire harness. The vehicle body locking portion provided in one of the clamps is locked with the locked portion provided in the vehicle body panel, and the wire harness is locked to the vehicle body panel.

In the clamp having the above-described configuration, a plurality of types are required according to the outer diameter of the wire harness or the exterior material of the wire harness, and there is a problem that the cost increases.
In order to solve this problem, Japanese Patent Application Laid-Open No. 8-74814 proposes a clamp that can cope with two types of outer diameters shown in FIGS.

  The clamp is provided with one end of a pair of substantially semi-annular holding bodies 101 and a lid 102 via a hinge portion 103, and two engagement step portions 105a and 105b at the other end of the lid 102. Is provided with a lock receiving portion 106 having an engaging protrusion 106a protruding from the other end of the holding body 101, and the locking protrusion 106a of the lock receiving portion 106 is provided with a lock engaging portion 106a. Either one of the engagement step portions 105a and 105b is selected and engaged.

  When the engagement step 105a engages with the engagement protrusion 106a, the dimension H of the center lower end of the holding body 101 and the center upper end of the lid 102 becomes maximum, and when the engagement step 105b engages with the engagement protrusion 106a, it is retained. The dimension H of the center lower end of the body 101 and the center upper end of the lid 102 is minimized, and the upper and lower ends of the body 101 can be held in pressure contact with the wire harness or the wire harness exterior material.

Japanese Utility Model Publication No. 2-33483 JP-A-8-74814

  The clamp of Patent Document 2 can adjust the size of the center lower end of the holding body 101 and the center upper end of the lid body 102 to be large or small. Therefore, when the outer diameter of the wire harness or the wire harness exterior member 200 shown in FIG. 9A is large, the holding body 101 and the inner peripheral surface of the lid body 102 can be in surface contact with each other over a wide range, and there is no problem in the supporting force. However, since the dimensional change in the left-right direction connecting the engagement portion between the lock engagement portion 105 and the lock receiving portion 106 and the hinge portion 103 is not substantially changed, the wire harness or the wire harness exterior material 200 is small in size. As shown in FIG. 9B, gaps C1 and C2 are generated on the left and right. Therefore, since the exterior 200 such as the wire harness or the corrugated tube is supported only at the upper and lower two points P1 and P2, the left and right are not supported. Therefore, the holding force of the clamp is reduced, and the direction regulation force of the wire harness or the exterior material is reduced. There is a problem that the linearity deteriorates due to a decrease in the so-called swing state.

  The present invention has been made in view of the above problems, and even if the outer diameter of the wire harness or the wire harness exterior material that can be held by the clamp is set to two or more kinds of large and small, in either case, in addition to the two-point support in the vertical direction, As an at least three-point support with direction support, it is an object to prevent a decrease in holding force and, as a result, to prevent swinging of the held wire harness and maintain linearity.

In order to solve the above-mentioned problem, the present invention connects one end of a pair of first and second semi-annular bodies via a hinge portion and connects the other end of one of the second semi-annular bodies to the other end. A plurality of locking claws that are selectively locked to the locking protrusions at the other end of the other first semi-annular body and spaced apart from the tip in the circumferential direction; and A vehicle body locking portion is provided on an outer peripheral surface of the first semi-annular body or the second semi-annular body,
A number of bulging portions corresponding to the number of the locking claws are provided on the inner peripheral surface of the second semi-annular body at intervals in the circumferential direction, and the protruding amount of these bulging portions increases as the distance from the tip increases. When the vertical dimension of the first and second semi-annular bodies is reduced by the locking claws that are locked to the locking protrusions, the bulging portion having a large protruding amount comes close to the position facing the hinge portion. There is provided a clamp for a wire harness characterized by being configured.

  In the clamp, as in the clamp of Patent Document 2, the vertical dimension can be adjusted to be large or small by selecting a locking claw that locks the locking protrusion. In addition, a large and small bulging portion is provided on the inner peripheral surface of the second semi-annular body, and the bulging portion having a large protruding amount approaches the left and right positions facing the hinge portion as the vertical dimension is reduced, and the wire harness or the wire The bulge is pressed against either the left or right side of the harness exterior material. Therefore, the wire harness or the wire harness exterior material can be supported by at least three points of support by the bulge portion from the conventional two-point upper and lower point support, and the holding force is improved, and as a result, the swing of the wire harness to be held is prevented. Linearity can be maintained. Moreover, it is only necessary to provide a bulging portion on the inner peripheral surface of one clamp, and there is an advantage that the number of parts is not increased and the number of work steps is not increased, so that the cost is not increased.

The bulging part having a large protruding amount is provided on the inner peripheral surface of the movable part partitioned by cutting, and the first and second semi-annular bodies are formed by the locking claws that are locked to the locking protrusions. When the vertical dimension of is small, it is preferable that the locking piece provided with the locking claw is positioned on the back surface of the movable part and holds the movable part.
In addition, when giving elasticity to a bulging part and / or not providing a big difference in the protrusion amount of a bulging part, it is not necessary to provide the movable part divided by the said notch | incision.

  The plurality of locking claws include a first locking claw provided at a tip of a lock piece provided on a tip side of the first semi-annular ring, and a second engagement provided near the hinge portion from the first locking claw. The locking piece is inserted into a locking piece insertion hole provided in the circumferential direction on the distal end side of the second semi-annular body, and the locking protrusion is formed on the inner surface of the locking piece insertion hole on the inlet side. It is preferable to project.

When the first locking claw is locked with the locking protrusion, the first bulging portion with a small protruding amount is positioned opposite to the hinge portion, and the second bulging portion with a large protruding amount is While being pushed in the outer diameter direction by a large diameter wire harness or wire harness exterior material,
When the second locking claw locks with the locking projection, the second bulging portion comes close to a position facing the hinge portion, and the first engagement is formed on the back surface of the second bulging portion. It is set as the structure which the front end side of the 1st semicircle body provided with the pawl is located.

A plurality of bulging portions provided on the inner surface of the second semi-annular body are provided with a circumferential groove in an axial intermediate portion, and a peak portion of the corrugated tube of the wire harness exterior material is fitted into the groove. It is said.
When the peak portion of the corrugated tube is fitted into the groove, the corrugated tube can be prevented from moving in the axial direction.
When the corrugated tube is not externally mounted on the wire harness, the groove is not necessarily provided, but the groove is provided and the bulging portion divided in the axial direction is pressed against the wire harness or the wire harness external material, respectively. Is preferred.

  According to the clamp of the present invention, even if the outer diameters of at least two types of wire harnesses or wire harness exterior materials are different, they can be shared by a single clamp, and even in the case of a small size, the clamp can wire At least three points of the harness or the wire harness exterior material can be supported, and the support force by the clamp can be increased. As a result, since the wire harness can be securely held by the clamp, the linearity can be maintained without oscillating the wire harness.

The 1st Embodiment of the clamp of the present invention is shown, (A) is a front view in the state where a pair of semi-annular bodies were opened, and (B) is a sectional view. It is a perspective view in the state where a pair of semi-annular bodies of the clamp were closed. It is drawing which shows the internal peripheral surface of the 2nd semicircle body of the said clamp. (A) is sectional drawing of the state which attached the said clamp to the large diameter corrugated tube, (B) is sectional drawing of the state which attached the said clamp to the small diameter corrugated tube. It is sectional drawing of the clamp of 2nd Embodiment. The clamp of 3rd Embodiment is shown, (A) is a principal part perspective view, (B) is sectional drawing of the state attached to the corrugated tube, (C) is sectional drawing which shows the modification of a bulging part. It is a perspective view of the clamp of a 4th embodiment. (A)-(C) are drawings which show a prior art example. (A) (B) is drawing which shows the problem of a prior art example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 4 show a clamp according to the first embodiment.

  The clamp 1 according to the first embodiment is attached by being externally fitted to a corrugated tube 3 made of a resin molded product that is externally mounted on a wire harness 2 arranged in an automobile and locked in a locking hole provided in a vehicle body panel. .

  The clamp 1 is composed of one component made of a resin molded product, and is molded from an elastic resin. One end of a pair of first semi-annular body 10 and second semi-annular body 11 having a shape obtained by dividing the substantially annular body into halves is connected via a hinge portion 12. One locking protrusion 14 is provided on the other end side of the second semi-annular body 11, and the other end side of the first semi-annular body 10 is used as a lock piece 15. The claw 16 and the second locking claw 17 are provided with a gap in the circumferential direction, and either the first locking claw 16 or the second locking claw 17 is locked to the locking projection 14 to fix the corrugated tube 3. The clamp 1 can be fitted and fixed. Further, a blade-like locking portion 18 is provided on the outer peripheral surface of the central portion in the circumferential direction of the second semi-annular body 11 and is inserted and locked in a locking hole (not shown) provided in the vehicle body panel. It is said.

  Specifically, a lock piece insertion hole 13 having a tip inlet 13 a is provided at the other end of the second semi-annular body 11, the lock piece insertion hole 13 extends in the circumferential direction, and an outlet of the lock piece insertion hole 13 is provided. 13 b is opened on the outer peripheral surface of the second semi-annular body 11. The inlet 13a of the lock piece insertion hole 13 has a shape in which the inner periphery is notched and the outer peripheral wall 11a is left, and the locking projection 14 projects from the inner surface of the outer peripheral wall 11a. Further, the outer peripheral wall 11 a is cut out at the outlet 13 b of the lock piece insertion hole 13.

  The lock piece 15 of the first semi-annular body 10 extends in the circumferential direction, and a triangular first locking claw 16 is provided on the distal end side of the outer peripheral surface of the lock piece 15 so that a required dimension is provided in the circumferential direction. A triangular second locking claw 17 is provided.

When the lock piece 15 of the first semi-annular body 10 is inserted into the inlet 13a of the lock piece insertion hole 13 of the second semi-annular body 11 from the first locking claw 16, and the corrugated tube 3 has a large diameter, The first locking claw 16 is locked to the locking protrusion 14. Since the insertion amount of the lock piece 15 is small, the lock piece 15 does not protrude outward from the outlet 13b of the lock piece insertion hole 13 as shown in FIG.
When the corrugated tube 3 has a small diameter, the insertion amount of the lock piece 15 into the lock piece insertion hole 13 is increased, and the second locking claw 17 is locked to the locking protrusion 14. The distal end side of the lock piece 15 provided with the first locking claw 16 is exposed outward from the outlet 13b of the lock piece insertion hole 13.

  Ribs 8 and 9 project along the outer edges of both sides of the first and second semi-annular bodies 10 and 11 near the hinge portion 12, and in the trough portion of the corrugated tube 3 that is sheathed on the wire harness 2. The ribs 8 and 9 are inserted to suppress the movement of the corrugated tube 3 in the axial direction.

  The second semi-annular body 11 has a first bulging portion 20 projecting from the inner peripheral surface in the circumferential direction of the lock piece insertion hole 13 and an inner circumference corresponding to the outlet 13 b of the lock piece insertion hole 13. A second bulging portion 21 protrudes from the surface, and the second bulging portion 21 is provided closer to the hinge portion 12 in the circumferential direction than the first bulging portion 20.

  The amount of protrusion from the first bulging portion 20 to the inside of the second bulging portion 21 is increased. Further, as shown in FIG. 3, two first and second bulge portions 20 and 21 are provided in parallel in the axial direction of the second semi-annular body 11, and the first bulge portion 20A arranged in parallel with each other. Circumferential grooves 24 and 25 are provided between 20B and between the second bulging portions 21A and 21B. The first bulging portions 20A and 20B and the second bulging portions 21A and 21B protrude from the outer edges of both sides of the second semi-annular body 11 with a required dimension.

  As shown in FIG. 4 (A), the first bulging portion 20 is positioned at a position opposed to the hinge portion 12 in the diameter direction in a state where the first locking claw 16 is locked to the locking projection 14. ing. In this state, since the second bulging portion 21 having a large protrusion amount presses the corrugated tube 3 inward, the second bulging portion 21 (21A, 21B) is pushed outward by the corrugated tube 3. Therefore, the corrugated tube 3 is prevented from being lifted by being excessively pressed by the second bulging portion 21.

  That is, as shown in FIGS. 1 (B), 2 and 3, a U-shaped cut 26 is provided so as to surround the second bulging portion 21 (21A, 21B), and the second bulging portion 21 is movable. Projecting on the inner surface of the piece 27. The notch 26 is provided so as to cross in the axial direction in the circumferential direction opposite to the first bulging portion 20 from a position close to the outer edges on both sides of the second semi-annular body 11, and has the U shape.

  Thus, when the corrugated tube 3 can be supported by the contact with the corrugated tube 3 by the first bulged portion 20 by providing the second bulged portion 21 having a large protruding amount on the inner surface of the movable piece 27, the locking piece Since the lock piece 15 is not inserted up to the position corresponding to the back surface of the second bulging portion 21 close to the outlet 13b of the insertion hole 13, the movable piece 27 protruding from the second bulging portion 21 is pushed outward. The corrugated tube 3 is not excessively pressed.

  As shown in FIG. 4 (B), the second bulging portion 21 is positioned substantially opposite to the hinge portion 12 in the diameter direction with the second locking claw 17 locked to the locking projection 14. ing. And the position where the 2nd latching claw 17 latched with the latching protrusion 14 is a position where the lock piece 15 was inserted deeply into the lock piece insertion hole 13, and the lock piece 15 is on the back of the second bulging portion 21. The movable piece 27 is positioned so that it cannot move outward.

  The clamp 1 having the above-described configuration is attached to a required position of the corrugated tube externally mounted on the wire harness 2. At that time, if the outer diameter of the corrugated tube 3A is large, the first locking claw 16 is locked to the locking protrusion 14 as shown in FIG. Thereby, the dimension of the center upper end of the 1st semicircle 10 and the center lower end of the 2nd semicircle 11 becomes a big dimension, and the 1st bulging part 20 opposes the hinge part 12 and the diameter direction, and is located. And the dimension between the hinge part 12 and the 1st bulging part 20 approximates the said up-down dimension. As a result, the upper and lower end points P1, P2 and the left and right end points P3, P4 of the large-diameter corrugated tube 3A are in contact with the inner peripheral surface of the clamp 1 and are in a state of being supported at four points. In that case, if the pressing force with respect to the corrugated tube 3A of the 2nd bulging part 21 with a large protrusion amount is large, the 2nd bulging part 21 will be extruded outside by the corrugated tube 3A, and the 2nd bulging part 21 will corrugate. An excessive load can be prevented from being applied to the tube 3A. As a result, the corrugated tube 3A with the wire harness 2 sheathed can be stably supported by the clamp 1, the swing of the wire harness 2 sheathed with the corrugated tube 3A can be suppressed, and the linearity can be maintained.

  If the corrugated tube that is sheathed on the wire harness 2 is a corrugated tube 3B having a small outer diameter, the second locking claw 17 is locked to the locking projection 14 as shown in FIG. Thereby, the dimension of the center upper end of the 1st semicircle 10 and the center lower end of the 2nd semicircle 11 becomes a small dimension, and the position where the 2nd bulging part 21 opposes the hinge part 12 substantially in a diametrical direction. Come on. The dimension between the hinge part 12 and the 2nd bulging part 21 approximates the said up-and-down dimension. Thus, the upper and lower end points P1, P2 and at least the left side point P3 of the small-diameter corrugated tube 3B are in contact with and supported by the inner peripheral surface of the clamp 1, and three points are supported. In addition, the corrugated tube 3B may come into contact with the inner surface of the hinge portion 12 to support four points. The lock piece 15 is positioned on the back surface of the second bulging portion 21 having a large protruding amount, and the second bulging portion 21 does not move outward, but firmly contacts and supports the corrugated tube 3B. As a result, the corrugated tube 3B with the wire harness 2 sheathed can be stably supported by the clamp 1, the swing of the wire harness 2 sheathed with the corrugated tube 3B can be suppressed, and the linearity can be maintained.

  In this way, since one type of clamp 1 can firmly support the large and small corrugated tubes 3A and 3B, it is possible to suppress the provision of many types of clamps 1 having different sizes, thereby reducing costs.

FIG. 5 shows a clamp 1B of the second embodiment.
In addition to the first locking claw 16 and the second locking claw 17, the lock piece 15 of the clamp 1 </ b> B is provided with a third locking locking claw 31. One of the claws is selected and locked. Therefore, the bulging portion provided on the inner surface of the second semi-annular portion 11 is also provided with the third bulging portion 32 in addition to the first and second bulging portions 20 and 21, and the third bulging portion 32 is the second bulging portion 32. The protruding part is larger than the bulging part 21. In addition, the second and third bulging portions 21 and 32 are provided on the inner surface of the movable piece 27.

The clamp 1B of the second embodiment can be adjusted in size in three stages, and thus can be used for corrugated tubes having three different sizes.
Since other configurations and operations are the same as those of the first embodiment, description thereof is omitted.

The clamp 1C of 3rd Embodiment is shown to FIG. 6 (A) (B) (C).
In the clamp 1C, the protruding amount of the second bulging portion 21 is larger than the protruding amount of the first bulging portion 20, but it does not place an excessive load on the corrugated tube 3, so it is provided in the first embodiment. The cutout 26 and the movable piece 27 that have been provided are not provided.
In addition, the first bulging portion 20 and the second bulging portion 21 are not solid but are formed of box-shaped bent pieces as shown in FIG. When pressed by the contact, it may be deformed in the flat direction.
Since other configurations and operations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

FIG. 7 shows a clamp 1D of the fourth embodiment.
The clamp 1D is not attached to the corrugated tube, but attached to the wire harness 2 that is focused and protected with an adhesive tape.
Therefore, the groove | channel fitted to the peak part of a corrugated tube is not provided between the 1st, 2nd bulging parts 20 and 21, but it is each one bulging part which followed the axial direction.
Even if the bulging portions are arranged in the axial direction as in the first embodiment and grooves are provided therebetween, they can be attached to the wire harness that is focused and protected by the adhesive tape.

DESCRIPTION OF SYMBOLS 1 Clamp 2 Wire harness 3 Corrugated tube 10 1st semi-annular body 11 2nd semi-annular body 12 Hinge part 13 Lock piece insertion hole 14 Locking protrusion 15 Lock piece 16 1st latching claw 17 2nd latching claw 18 Feather-like locking part 20 1st bulging part 21 2nd bulging part 26 notch 27 movable piece

Claims (4)

One end of the pair of first and second semi-annular bodies is connected to each other via a hinge portion, and one locking projection is provided on the other end of one of the second semi-annular bodies, A plurality of locking claws that are selectively locked to the locking projections are provided at the other end of the first semi-annular body at intervals from the tip in the circumferential direction, and the first semi-circular ring or the second semi-circular ring A vehicle body locking part is provided on the outer peripheral surface of the semi-annular body,
A number of bulging portions corresponding to the number of the locking claws are provided on the inner peripheral surface of the second semi-annular body at intervals in the circumferential direction, and the protruding amount of these bulging portions increases as the distance from the tip increases. When the vertical dimension of the first and second semi-annular bodies is reduced by the locking claws that are locked to the locking protrusions, the bulging portion having a large protruding amount comes close to the position facing the hinge portion. A clamp for a wire harness characterized by having a configuration.   The bulging part having a large protruding amount is provided on the inner peripheral surface of the movable part partitioned by cutting, and the first and second semi-annular bodies are formed by the locking claws that are locked to the locking protrusions. The clamp for a wire harness according to claim 1, wherein a lock piece provided with the locking claw is positioned on the back surface of the movable portion and holds the movable portion when the vertical dimension of the wire harness is small.   The plurality of locking claws include a first locking claw provided at a tip of a lock piece provided on a tip side of the first semi-annular ring, and a second engagement provided near the hinge portion from the first locking claw. The locking piece is inserted into a locking piece insertion hole provided in the circumferential direction on the distal end side of the second semi-annular body, and the locking protrusion is formed on the inner surface of the locking piece insertion hole on the inlet side. The clamp for wire harnesses of Claim 1 or Claim 2 which has protruded.   A plurality of bulging portions provided on the inner surface of the second semi-annular body are provided with a circumferential groove in an axial intermediate portion, and a peak portion of a corrugated tube of a wire harness exterior material is fitted into the groove. The clamp for wire harnesses according to any one of claims 1 to 3.

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