JP2012029484A - Band clamp for colgate tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a band clamp to be shared even for colgate tubes of different sizes mounted on the outer package of a wiring harness.SOLUTION: A main body and a band protruding from the main body are formed by integral molding. The main body comprises a band insertion hole, an engaging piece protruding from an inner surface surrounding the band insertion hole, and a bracket insertion hole for inserting a bracket plate protruding from a vehicle. The bracket insertion hole communicates with the band insertion hole in an active position of the engaging piece and the engaging piece engaged with the band inserted into the band insertion hole is pressed by the bracket plate inserted into the bracket insertion hole in the engaging direction while parts to be engaged with the engaging piece are provided at intervals in positions corresponding to the outer diameter of crests of colgate tubes of multiple sizes in the center part of the width direction of the band and salients to be fitted into troughs of the colgate tubes are provided at intervals in the long direction on both sides of the width direction of the band.

Description

  The present invention relates to a band clamp for a corrugated tube, and more specifically, in a band clamp for winding a band around a corrugated tube to be mounted on a wire harness arranged in an automobile and fixing the band clamp to a vehicle body, the corrugated tube can be shared by different sizes. It is.

A large number of electric wires to be wired to an automobile are converged and wired as a wire harness, and a clamp is attached to the wire harness with a space therebetween, and the clamp is fixed to the vehicle body panel.
In many cases, an adhesive tape is wound as a means for converging a large number of electric wire groups, but in many cases, a corrugated tube made of a resin molded product is used as an exterior material and is passed through the electric wire group. The corrugated tube has an advantage in that the annular crests and troughs are alternately continued in the axial direction, so that the corrugated tube has flexibility and stretchability and the wiring harness can be routed smoothly. In addition, when the adhesive tape is wound around the electric wire group to perform convergence protection, the finishing accuracy varies depending on the skill level of the worker. However, the use of the corrugated tube has an advantage that the skill level of the worker is not affected.

  In order to attach a corrugated tube externally mounted on a wire harness to a vehicle body panel, a corrugated clamp provided in JP-A-7-322448 is used. As shown in FIG. 7, the corrugated clamp 100 has one end of a pair of semi-annular portions 101A and 101B connected to each other via a hinge 103 so that the corrugated tube 110 is surrounded by the semi-annular portions 101A and 101B. After that, it is locked and the bracket protruding from the vehicle body panel is inserted and locked to the bracket locking portion 102 provided on one semi-annular portion 101A.

  Since the corrugated clamp 100 needs to be a dedicated product corresponding to the size of the corrugated tube 110 and the corrugated tube 110 needs to correspond to the outer diameter of the wire harness W / H, the corrugated tube 110 has a size. There are many different part numbers. Therefore, the corrugated clamp needs to be provided so as to correspond to the multi-corrugated corrugated tubes having different sizes, and there is a problem that the number of parts is increased and the cost is increased.

  In order to solve the problem, a band clamp shown in FIGS. 8A and 8B that can be attached to a corrugated tube having a different diameter is provided in Japanese Patent Laid-Open No. 11-255260. The band clamp 120 is provided with a corner portion 122 projecting into the concave portion of the corrugated tube on the surface on the inner peripheral surface side of the band portion 121 so that the band is attached to the corrugated tube in a state in which the band is prevented from rotating. .

JP-A-7-322448 Japanese Patent Laid-Open No. 11-255260

  When the band clamp shown in FIG. 8 is used, the band can be firmly attached to the corrugated tube in a state where rotation is prevented. However, when attaching the band clamp fixed to the corrugated tube to the vehicle body, if the band clamp body mounting direction is misaligned with the locking holes or brackets on the vehicle body mounting side, the band clamp body mounting direction is aligned with the vehicle body side. The corrugated tube will twist. Therefore, the band can be rotated in the circumferential direction with respect to the corrugated tube while preventing the lateral displacement (displacement in the axial direction of the corrugated tube) with respect to the corrugated tube, and the vehicle body mounting direction can be adjusted without causing the corrugated tube to twist. It is preferable to be able to match the sides.

Further, there is a problem that the corrugated tube 110 is likely to be crushed when a band wound around the outer peripheral surface of the corrugated tube is fastened.
That is, as shown in FIG. 8 (B), the corrugated tube 110 is provided with a slit 130 that is continuous in the axial direction, and the electric wire group can be laterally inserted into the corrugated tube 110 through the slit 130. When tightened, the split end of the slit 130 wraps and the corrugated tube 110 is likely to be crushed. In this state, there is a possibility that the edge of the split end of the slit 130 contacts the electric wire group and damages the electric wire group.
Therefore, when attaching a band clamp to a corrugated tube, it is necessary to fasten it at a position that matches the size of the corrugated tube. However, since the fastening position cannot be specified, there is a problem that band tightening is likely to occur.

  The present invention has been made in view of the above problems, and in a band clamp attached to a corrugated tube, it is securely attached to corrugated tubes of different sizes without being fastened until the band cannot be moved to the outer peripheral surface of the corrugated tube. It is an object of the present invention to provide a band clamp for a corrugated tube that can be attached to the corrugated tube when the vehicle body is mounted.

In order to solve the above problems, the present invention is a band clamp attached to a corrugated tube that is sheathed on a wire harness,
The main body and the band protruding from the main body are integrally molded,
The main body includes a band insertion hole, a locking piece protruding from an inner surface surrounding the band insertion hole, and a bracket insertion hole for inserting a bracket plate protruding from the vehicle body,
The bracket insertion hole communicates with the band insertion hole at the operating position of the locking piece, and the bracket plate that is locked with the band inserted through the band insertion hole is inserted into the bracket insertion hole. While pressing in the locking direction with
At the center in the width direction of the band, a locked portion to which the locking piece is locked is provided at a position corresponding to the outer diameter of the peak portion of the corrugated tube of a plurality of sizes, and the band A band clamp for a corrugated tube is provided, in which convex portions that fit into the valley portions of the corrugated tube are provided at both sides in the width direction with an interval in the length direction.

  The locking piece is a lever-shaped locking piece that protrudes from the inner surface of the peripheral wall surrounding the band insertion hole, and has a locking claw protruding on the lower surface of the tip and a pressing protrusion protruding on the upper surface of the opposite position. The locked portion provided in the band is preferably a locking hole or a locking recess into which the locking claw is inserted and locked.

  When the band clamp of the present invention is attached to the vehicle body, the bracket plate inserted into the bracket insertion hole engages the locking claw at the distal end of the locking piece to be inserted into the locked portion consisting of the locking hole or locking recess of the band. I try to hold it down. Thus, even if the band is not attached in close contact with the outer peripheral surface of the corrugated tube, and is rotatably attached, the fastening of the band does not come off, so the holding of the corrugated tube by the band does not come off, and Since there is no need to fix the band in close contact with the outer peripheral surface of the corrugated tube, the band clamp can be used in common even if the outer diameter size of the corrugated tube is different. Specifically, if the difference in the outer diameter size of the corrugated tube is in the range of 0.3 to 0.8 mm, even if the locked portions to which the locking pieces are inserted and locked are in the same place, the locking is performed. Can be secured.

Therefore, in the band clamp of the present invention, the locked portion provided on the band has a dimension obtained by adding 0.3 mm to 0.8 mm to the outer peripheral dimension of the peak portion of the corrugated tube from the connection position with the band clamp main body. In the state where the locked hole is provided at the opened position, the locking piece is locked in the locked hole and wound around the corrugated tube, the corrugated tube is rotatable, and
It is preferable that a plurality of the holes to be locked are provided with an interval of 6 to 13 mm, and the dimension between the locked portions positioned at both ends in the length direction is 20 to 60 mm.

  By adopting the above-described configuration, for example, a band clamp of one product number can be shared from a small corrugated tube having a diameter of 10 mm to a large corrugated tube having a diameter of 32 mm.

  The convex portions on both sides in the width direction of the band are provided from positions close to the connection position with the main body, while the locked portion is displaced in the length direction from the convex portion and on the protruding end side of the band. Provided.

As described above, the band clamp for the corrugated tube according to the present invention is attached to the corrugated tube so as to be rotatable, and by securing the band with a bracket protruding from the vehicle body side when the vehicle body is fixed, The band clamp can be shared even if the corrugated tube has slightly different dimensions. This eliminates the need for a dedicated clamp for each corrugated tube size, and can greatly reduce the number of components. Accordingly, parts management becomes easy.
In addition, when the band clamp is fixed to the bracket of the vehicle body, the band clamp can be rotated around the corrugated tube, so that the corrugated tube and the wire harness inserted through the corrugated tube are not twisted.

It is a perspective view which shows the usage example of the band clamp of embodiment of this invention. (A) (B) is sectional drawing which shows the corrugated tube which can attach the band clamp of the said embodiment. (A) is a perspective view of the said band clamp, (B) is sectional drawing. It is an expanded sectional view of the main part of the band clamp. (A) is sectional drawing which shows the state attached to the corrugated tube which covered the said band clamp to the wire harness, (B) is a principal part expanded sectional view which shows the relationship between a corrugated tube and a band clamp, (C) is a side view. Is part of. It is sectional drawing which shows the attachment state to the vehicle body panel of a band clamp. It is sectional drawing which shows the conventional corrugated clamp. (A) (B) is drawing which shows the band clamp for corrugated tubes proposed conventionally.

Hereinafter, embodiments of a band clamp for a corrugated tube of the present invention will be described with reference to FIGS.
The band clamp 1 is a bracket plate made of a substantially rectangular plate protruding from the vehicle body panel P when a band is wound around the outer peripheral surface of the corrugated tube 3 through which the wire harness 2 is inserted and the wire harness 2 is routed to the vehicle body. 4 is inserted and locked and fixed to the vehicle body panel P.

The corrugated tube 3 is made of a commonly used corrugated tube, made of a resin molded product in which annular crests 3a and troughs 3b are alternately provided in the axial direction, and slits 3c are provided along the axial direction. . There are several types of corrugated tubes 3 that are widely used, and the inner diameter (valley inner diameter) is 5 mm, 7 mm, 10 mm, 13 mm,... At intervals of 2 mm to 3 mm.
The band clamp 1 of the present embodiment is in a range from a corrugated tube 3 (3-1) having an inner diameter of 10 mm shown in FIG. 2 (A) to a corrugated tube 3 (3-10) having an inner diameter of 32 mm shown in FIG. 2 (B). A plurality of types (10 types) of corrugated tubes 3 having different inner diameters are used in common.

As shown in FIGS. 3A, 3B, and 4, the band clamp 1 is formed of a resin molded product in which a main body 10 and a band 11 protruding from the main body 10 are integrally formed.
The main body 10 has a substantially rectangular parallelepiped shape, and in the figure, a band insertion hole 13 that opens to the left and right side surfaces, a locking piece 14 that protrudes from the inner surface of the peripheral wall surrounding the band through hole 13, and a bracket plate 4 that protrudes from the vehicle body panel P. The bracket insertion hole 15 is provided in parallel with the band insertion hole 13 and the partition wall 16 in between.

  The locking piece 14 protrudes like a lever that is cantilevered by being inclined downward from the outlet 13a side of the band insertion hole 13 toward the inlet 13b. A locking claw 14a protrudes from the lower surface of the front end of the locking piece 14, and a pressing protrusion 14b protrudes from the upper surface on the opposite side.

  Although the bunt insertion hole 13 is a through hole, the bracket insertion hole 15 has an inlet 15a on the inlet 13b side of the band insertion hole 13, but the other end is terminated inside the main body 10 and is not a through hole. Further, the partition wall 16 is not provided on the back end side of the bracket insertion hole 15, and a space portion 17 in which the band insertion hole 13 and the bracket insertion hole 15 are communicated is provided. The space portion 17 is an operating position where a locking claw 14 a provided at the tip of the locking piece 14 is inserted and locked into a locking hole 20 described later of the band 11. Thus, the pressing protrusion 14b on the upper surface side of the locking claw 14a of the locking piece 14 inserted into the locking hole 20 of the band 11 is pressed in the locking direction by the bracket plate 4 inserted into the bracket insertion hole 15. ing.

  The band 11 protrudes from the bottom surface of the main body 10 and has a length direction L of about 120 mm. The band 11 is provided with locking holes 20 at a plurality of positions corresponding to the outer diameters of the crest portions 3a of a plurality of types (ten types) of corrugated tubes 3 having an inner diameter of 10 mm to 32 mm. A plurality of the locking holes 20 are provided at intervals in the length direction L, and the locking holes 20 are provided at an interval of 6 mm to 13 mm.

In the present embodiment, ten locking holes, that is, a locking hole 20-1 corresponding to the corrugated tube 3-1 having an inner diameter of 10 mm, and a locking hole 20-10 corresponding to the corrugated tube 3-10 having an inner diameter of 32 mm are provided. .
That is, the locking hole 20 closest to the connection position with the main body 10 is used as the locking hole 20-1 for the corrugated tube of the minimum size, and a plurality of gaps L1 of 6 to 13 mm are sequentially formed toward the end of the band 11. (10) are provided. Since the corrugated tube of the minimum size to which the band clamp 1 of the present embodiment is attached has an inner diameter of 10 mm, it is provided with an interval of about 35 mm from the connection end with the main body 10.

In a state where the locking claw 14a of the band 11 is inserted and locked into the corresponding locking hole 20, the outer peripheral surface of the peak portion 3a of the corrugated tube 3 is 0.3 to 0.8 mm, and in this embodiment, about 0.5 mm. A gap C [shown in FIG. 5B] is opened to enable fastening in a rotatable manner.
The locking hole 20 may be of a size and shape that allows the locking claw 14a of the locking piece 14 to be inserted and locked, and may be a locked portion including a locking recess instead of the locking hole 20.

Further, the band 11 has a trough portion 3b of the corrugated tube 3 on both sides in the width direction S of the surface 11a that becomes the inner peripheral surface during winding from the connecting end with the main body 10 to the position where the locking hole 20 is provided. Protrusions 21A and 21B that are fitted to each other are provided at intervals in the length direction. These convex portions 21 </ b> A and 21 </ b> B are provided at positions where the convex portions 21 </ b> A and 21 </ b> B are fitted to the valley portions 3 b on both sides sandwiching one peak portion 3 a of the corrugated tube 3. The convex portions 21A and 21B are rectangular convex portions having a short width direction S and a long length L so that they can be fitted even if the pitch of the valley portions 3b is slightly different. In addition, the band 11 is not fitted and fixed so as to bite into the valley portion 3b, and the band 11 can be rotated with respect to the corrugated tube 3 and lateral displacement can be prevented.
The convex portions 21A and 21B are provided on the side of the band 11 connected to the main body 10, and the locking hole 20 is displaced from the position 30 mm or more away from the position of connection with the main body 10 toward the band tip side as described above. It is provided.

  Next, a process of attaching the band clamp 1 to the corrugated tube 3 and a process of fixing to the vehicle body panel P will be described.

  The band clamp 1 is attached to the required position of the corrugated tube 3 through the wire harness 2. In that case, the band clamp 1 of this embodiment shall be attached to the 10 corrugated tube 3 of internal diameter 10mm-32mm as mentioned above. That is, the locking hole 20-1 closest to the main body connecting position of the band 11 is locked to the locking piece 14 in the corrugated tube having a minimum inner diameter of 10 mm. Next, for the corrugated tube with an inner diameter of 12 mm, the locking piece 14 is locked in the locking hole 20-2 at the next position, and for the corrugated tube with the maximum diameter of 32 mm, the position of the band tip position is assumed. It is assumed that it is locked to the blind hole 20-10. Therefore, the worker can easily recognize which locking hole 20 the locking piece 14 is inserted and locked in accordance with the size of the corrugated tube 3.

  When attaching the band clamp 1 to the corrugated tube 3, as shown in FIG. 5C, the central portion of the band 11 in the width direction S is brought into contact with the outer peripheral surface of the peak portion 3 a of the corrugated tube 3. The convex portions 21A and 21B on the circumferential surface side are inserted into the valley portions 3b and 3b on both sides, and the band 11 is wound around the outer circumferential surface of the mountain portion. As shown in FIG. 5A, the wound band 11 is inserted through the band insertion hole 13 of the main body 10 from the inlet 13b and penetrates. In a state where the band 11 pulled out from the outlet 13a is stopped at a position where the locking claw 14a of the locking piece 14 is inserted into the required locking hole 20, and the locking claw 14a is inserted and locked into the locking hole 20, The band clamp 1 is attached to the corrugated tube 3.

  In this state, the convex portions 21 </ b> A and 21 </ b> B on both sides in the width direction of the band 11 are inserted into the valley portions 3 b and 3 b of the corrugated tube 3, so that the band 11 is laterally displaced in the axial direction with respect to the corrugated tube 3. Can be prevented. Further, as shown in FIG. 5B, the central portion of the band 11 in the width direction is rotatably fastened with a gap C of less than 0.5 mm in the outer peripheral surface of the peak portion 3a of the corrugated tube 3.

In this way, the wire harness 2 is routed to the automobile with the band clamp 1 attached to the corrugated tube 3 in advance. As shown in FIG. 6, the main body 10 of the band clamp 1 is positioned at a position where the bracket plate 4 protrudes from the vehicle body panel P, and the bracket plate 4 is inserted into the bracket insertion hole 15 of the main body 10. At that time, the band clamp 1 is positioned so that the bracket plate 4 can be inserted straight into the bracket insertion hole 15 of the band clamp 1.
When the inlet 15a of the band insertion hole 15 is not opposed to the bracket plate 4, the band clamp 1 can be rotated with respect to the corrugated tube 3, so that the positioning can be easily performed.

  The front end of the bracket plate 4 inserted from the inlet 15 a of the bracket insertion hole 15 presses the pressing protrusion 14 b on the upper surface of the front end of the locking piece 14 downward, and the locking claw 14 a that protrudes from the lower surface of the front end of the locking piece 14. Is held in the locking hole 20 to fix the locked state. Thereby, the position of the band clamp 1 with respect to the bracket board 4 can be fixed, and the attachment position of the band clamp 1 with respect to the corrugated tube 3 is also fixed.

In the corrugated tube 3-1 having the minimum radius (inner diameter 10 mm), the locking claw 14a of the locking piece 14 is inserted and locked in the locking hole 20-1. On the other hand, in the corrugated tube 3-10 having the maximum diameter (inner diameter 32 mm), the locking claw 14a of the locking piece 14 is locked in the locking hole 20-10.
Thus, the band clamp 1 of the same size is used in common, and the only difference is the locking hole 20 for inserting and locking the locking claw 14a of the locking piece 14.

  The band clamp 1 of the above embodiment has a size used in common for the corrugated tube 3 having an inner diameter of 10 mm to 32 mm. A band clamp for a large corrugated tube in which the length of the band 11 is increased and the installation of the locking hole 20 is changed is separately provided for a large corrugated tube having an inner diameter of 32 mm and about 60 mm. However, the number of part numbers of the band clamp may be two to three, and the number of parts can be greatly reduced as compared with the case where a dedicated corrugated tube clamp is provided for each corrugated tube size.

DESCRIPTION OF SYMBOLS 1 Band clamp 2 Wire harness 3 Corrugated tube 3a Peak part 3b Valley part 4 Bracket board 10 Main body 11 Band 13 Band insertion hole 14 Locking piece 14a Locking claw 14b Holding protrusion 15 Bracket insertion hole 16 Bulkhead 17 Space part 20 (20- 1, 20-10) Locking holes 21A, 21B Protrusion P Car body panel

Claims (4)

A band clamp that is attached to a corrugated tube that is externally mounted on a wire harness, and a main body and a band that protrudes from the main body are integrally formed,
The main body includes a band insertion hole, a locking piece protruding from an inner surface surrounding the band insertion hole, and a bracket insertion hole for inserting a bracket plate protruding from the vehicle body,
The bracket insertion hole communicates with the band insertion hole at the operating position of the locking piece, and the bracket plate that is locked with the band inserted through the band insertion hole is inserted into the bracket insertion hole. While pressing in the locking direction with
At the center in the width direction of the band, a locked portion to which the locking piece is locked is provided at a position corresponding to the outer diameter of the peak portion of the corrugated tube of a plurality of sizes, and the band A band clamp for a corrugated tube, characterized in that convex portions that fit into the valley portions of the corrugated tube are provided on both sides in the width direction at intervals in the length direction.   The locking piece is a lever-shaped locking piece that protrudes from the inner surface of the peripheral wall surrounding the band insertion hole, and has a locking claw protruding on the lower surface of the tip and a pressing protrusion protruding on the upper surface of the opposite position. The corrugated tube band clamp according to claim 1, wherein the locked portion provided in the band is a locking hole or a locking recess into which the locking claw is inserted and locked. The locked portion provided on the band is provided with the locking hole at a position obtained by adding 0.3 mm to 0.8 mm to the outer peripheral size of the peak portion of the corrugated tube from the connecting position with the main body, With the locking piece locked in the locking hole and wound around the corrugated tube, the corrugated tube is rotatable, and
The band clamp for a corrugated tube according to claim 1 or 2, wherein a plurality of the locking holes are provided at intervals of 6 to 13 mm, and a dimension between the locking holes at both ends is 20 to 60 mm.   The convex portions on both sides in the width direction of the band are provided from positions close to the connection position with the main body, while the locked portion is provided on the protruding end side of the band, and the convex portion and the locked portion are long. The band clamp for a corrugated tube according to any one of claims 1 to 3, wherein the band clamp is displaced in a direction.

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