JP5780200B2 - Corrugated tube clamp - Google Patents

Description

  The present invention relates to a clamp for a corrugated tube, and more particularly, to prevent positional misalignment of a slit corrugated tube held by a substrate type clamp without tape winding.

  Conventionally, a substrate type clamp 100 as shown in FIGS. 5A and 5B is used as a clamp for fixing a wire harness routed to a vehicle to a vehicle body. The clamp 100 has a rectangular board portion 101 for fixing the wire harness W / H along the length direction by winding a tape (T), and protrudes from the center of the board portion 101 into a locking hole 121 of the vehicle body 120. A vehicle body locking portion 102 to be inserted and locked is provided, and by using the board-type clamp 100, the wire harness W / H can be fixed to the vehicle body 120 and the path of the wire harness W / H can be restricted. Japanese Patent Laid-Open No. 2001-327052 (Patent Document 1)].

  Further, in the wire harness W / H routed in the vehicle, in order to protect the electric wire constituting the wire harness W / H from an external interference material (not shown), a mountain portion 111 and a valley portion that are continuous in the circumferential direction. In many cases, a corrugated tube 110 in which 112 is alternately arranged in the length direction is sheathed. As the corrugated tube 110, as shown in FIG. 6, a corrugated tube with a slit provided with a slit 113 in the length direction is generally used. When the wire harness is assembled, an operator opens the slit 113 to the wire harness W / H. The corrugated tube 110 with slits is covered from the direction perpendicular to the axis.

  Even when the substrate-type clamp 100 is attached to the corrugated tube 110 sheathed on the wire harness W / H, as shown in FIG. 7A, the both ends of the corrugated tube 110 are taped to the substrate portion 101 along the length direction. (T) The winding is fixed. However, fixing the tape between the corrugated tube 110 with many irregularities and the substrate portion 101 is an operation that requires skill, so that it is difficult to improve workability. Even if the tape is firmly fixed, if a tensile force is applied to the corrugated tube 110 during assembly to the vehicle, the corrugated tube 110 is displaced with respect to the clamp 100 as shown in FIG. In some cases, the wire harness W / H cannot be assembled at the designed position.

JP 2001-327052 A

  The present invention has been made in view of the above problems, and an object of the present invention is to fix a corrugated tube with a slit to a substrate-type clamp without tape winding so as to prevent displacement of the corrugated tube.

In order to solve the above-mentioned problem, the present invention is a clamp that is attached to a corrugated tube in which crests and troughs continuous in the circumferential direction are alternately continued in the length direction and slits are continuously provided in the length direction. A rectangular shaped substrate part placed along the length direction of the corrugated tube, and a resin molded product provided with a vehicle body locking part protruding from the center part in the length direction of the substrate part,
A semi-annular first holding part and a second holding part that are fitted over a half circumference of the corrugated tube project from the end in the length direction of the substrate part,
A rib that fits in the circumferential direction on the inner peripheral surface of the first holding portion in the corrugated tube and is inserted into the slit of the corrugated tube at one end in the circumferential direction of the first holding portion. The clamp for corrugated tube is provided, wherein the second holding portion is configured to be fitted and held on the corrugated tube without tape winding so that the second holding portion is fitted and held across the slit. .

As described above, in the clamp according to the present invention, the semi-annular first holding portion and the second holding portion that are fitted over the half circumference of the corrugated tube at the end in the length direction of the substrate portion on which the corrugated tube is placed. Is protruding. In particular, since a rib that fits in the trough portion of the corrugated tube is provided in the circumferential direction on the inner peripheral surface of the first holding portion provided on one end side of the substrate portion, the rib is fitted in the trough portion of the corrugated tube. It is possible to prevent displacement of the corrugated tube held in the length direction alone. Moreover, since the bending part inserted in the slit of a corrugated tube is provided in the end of the circumferential direction of the said 1st holding | maintenance part, the position shift | offset | difference (the circumferential direction of a corrugated tube only by inserting this bending part in a slit) Rotation) can also be prevented.
Further, since the second holding portion provided on the other end side of the substrate portion is shaped to be fitted and held across the slit of the corrugated tube, the bent portion of the first holding portion is inserted together with the stable holding of the corrugated tube. Opening of the slit can be prevented.

That is, according to the above-described configuration, the corrugated tube held by the first and second holding portions in the length direction and the circumferential direction can be obtained without performing the tape winding between the corrugated tube and the substrate portion, which has been conventionally required. Since the displacement and the opening of the slit can be easily prevented, the clamp can be attached to the corrugated tube with good workability regardless of the skill level of the operator.
The slit of the corrugated tube into which the bent portion of the first holding portion is inserted is located at the uppermost portion in the center on the upper side of the corrugated tube where the dimension from the lowermost portion of the substrate portion and the first and second holding portions is maximum. It is preferable to make it.

In addition, the first and second holding portions hold the corrugated tube, and the outer peripheral dimension of the corrugated tube from the end in the length direction of the second holding portion to the slit is determined by the first holding portion. It is smaller than the outer peripheral dimension of the corrugated tube from the end on the side where the bent portion is not provided to the slit, and the central angle θ of the arc forming the second holding portion is 180 ° <θ <280 °. preferable.
Furthermore, it is preferable that the inner peripheral surface of the second holding portion is a smooth surface without providing a rib, and is externally fitted so as to press the outer peripheral surface of the peak portion of the corrugated tube inward.

  According to the above configuration, both sides of the corrugated tube sandwiching the slit by the second holding portion can be pressed inward over a wide range, so that the corrugated tube can be more effectively prevented from opening, and the corrugated The outer fitting of the 2nd holding | maintenance part to a tube can be performed without difficulty.

  However, it is not limited to the above-described configuration, for example, a rib may be provided on the inner peripheral surface of the second holding portion that presses the peak portion of the corrugated tube to further increase the inward pressing force, Or you may provide the rib fitted to the trough part of a corrugated tube like the 1st holding | maintenance part in the internal peripheral surface of a 2nd holding | maintenance part.

  As described above, in the clamp of the present invention, the semi-annular first holding portion and the second holding portion that are fitted over the half circumference of the corrugated tube at the end in the length direction of the substrate portion on which the corrugated tube is placed. Is protruding. In particular, since ribs that fit into the troughs of the corrugated tube are provided in the circumferential direction on the inner peripheral surface of the first holding part provided on one end side of the substrate part, the positional deviation of the held corrugated tube in the length direction is provided. Can be prevented. Moreover, since the bending part inserted in the slit of a corrugated tube is provided in the circumferential end of the said 1st holding | maintenance part, the position shift (rotation) to the circumferential direction of a corrugated tube can also be prevented. Further, since the second holding portion provided on the other end side of the substrate portion is shaped to be fitted and held across the slit of the corrugated tube, the bent portion of the first holding portion is inserted together with the stable holding of the corrugated tube. Opening of the slit can be prevented.

  That is, according to the above-described configuration, the corrugated tube held by the first and second holding portions in the length direction and the circumferential direction can be obtained without performing the tape winding between the corrugated tube and the substrate portion, which has been conventionally required. Since the displacement and the opening of the slit can be easily prevented, the clamp can be attached to the corrugated tube with good workability regardless of the skill level of the operator.

It is a perspective view which shows the clamp for corrugated tubes of this embodiment. It is a perspective view which shows the state which attached the clamp to the corrugated tube. (A) is the front view seen from the a direction of FIG. 2, (B) is a top view. (A) is the sectional view on the AA line of FIG. 3, (B) is the sectional view on the BB line, (C) is the sectional view on the CC line. It is a figure which shows a prior art example, (A) is a front view which shows the state which attached the clamp to the wire harness, (B) is a front view which shows the state which latched the clamp of (A) to the vehicle body. It is a figure which shows a prior art example. It is a figure which shows a prior art example, (A) is a front view which shows the clamp immediately after fixing a corrugated tube to a board | substrate by tape winding, (B) is a front view which shows the state which the corrugated tube shifted in the arrow direction. is there.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 4 show an embodiment of the present invention. In this embodiment, a corrugated tube 10 is externally mounted on a wire harness routed in a vehicle, and a corrugated tube clamp 1 is attached to a required position of the corrugated tube 10. Although the wire harness is not shown, the wire harness is inserted into the corrugated tube 10.
As shown in FIGS. 2 and 3, the corrugated tube 10 has the ridges 11 and the valleys 12 that are continuous in the circumferential direction alternately arranged in the length direction, and the slits 13 are continuously provided in the length direction. Corrugated tube with slits.

  Further, as shown in FIGS. 1 to 3, the clamp 1 of the corrugated tube 10 includes a rectangular substrate portion 2 on which the corrugated tube 10 is placed along the length direction of the corrugated tube 10, and the substrate portion 2. The vehicle-body locking part 3 is provided with an oval plate part 3a at the center of the lower surface of the substrate part 2 and the dish. A support shaft portion 3b is inserted from the center of the lower surface of the portion 3a into a locking hole (not shown) of the vehicle body, and a pair of left and right locking blade portions 3c are folded back from the tip position of the support shaft portion 3b. A locking step portion 3d that locks to the periphery of the locking hole is provided at the tip of each locking blade portion 3c.

  In addition, a semi-annular first holding part 4 and a second holding part 7 that are fitted over a half circumference of the corrugated tube 10 project from the end of the substrate part 2 in the length direction. In the present embodiment, the lowermost portions 4 a and 7 a of the inner peripheral surfaces of the first and second holding portions 4 and 7 are arranged so as to be substantially the same height as the upper surface 2 a of the substrate portion 2, and the substrate portion 2. And the slit 13 of the corrugated tube 10 mounted in the 1st, 2nd holding | maintenance parts 4 and 7 is located in the uppermost part of the tube upper surface side center. Therefore, in the present embodiment, as shown in FIG. 4A, the position of one end 4b in the circumferential direction of the first holding part 4 is the uppermost part that forms a central angle of 180 ° with the lowermost part 4a of the first holding part 4. And a bent portion 6 that protrudes at a right angle from the position and is inserted into the slit 13 of the corrugated tube 10 is provided. Further, the position of the other end 4c of the first holding part 4 is a position that forms a central angle α of 260 to 280 ° with the one end 4b of the first holding part 4, and a corrugated central position in the width direction of the first holding part 4 Ribs 5 to be fitted into the valleys 12 of the tube 10 are provided so as to protrude in the circumferential direction.

On the other hand, as shown in FIG. 4 (B), the second holding portion 7 has a shape that externally holds the corrugated tube 10 across the slit 13, and the inner peripheral surface of the second holding portion 7 is not provided with a rib. As a smooth surface, the corrugated tube 10 is externally fitted so as to press the outer peripheral surface of the peak portion 11 inward. In the present embodiment, the length of the arc from the lowermost part 7a to the one end 7b of the second holding part 7 is made equal to the length of the arc from the lowermost part 7a to the other end 7c, and from the one end 7b of the second holding part 7 The arc center angle θ up to the other end 7c is 240 to 260 °. That is, in a state where the first and second holding portions 4 and 7 hold the corrugated tube 10, (the outer peripheral dimensions from the end portions 7b and 7c of the second holding portion 7 to the slit 13 of the corrugated tube 10) <(first As an outer peripheral dimension from the end 4c of the holding portion 4 to the slit 13 of the corrugated tube 10, the second holding portion 7 has a function of preventing the slit 13 from opening.
In addition, in this embodiment, although the internal peripheral surface of the 2nd holding | maintenance part 7 is made into the smooth surface, it is not limited to this, You may project the rib for pressing the peak part 11 of the corrugated tube 10 more strongly. Alternatively, a rib that fits into the valley portion 12 of the corrugated tube 10 may be provided in a protruding manner in the same manner as the first holding portion 4.

  As described above, in the clamp 1 according to the present embodiment, the semi-annular first holding portion 4 that fits more than half the circumference of the corrugated tube 10 at the end in the length direction of the substrate portion 2 on which the corrugated tube 10 is placed. And the 2nd holding part 7 is protrudingly provided. In particular, since the rib 5 that fits into the valley portion 12 of the corrugated tube 10 is provided in the circumferential direction on the inner peripheral surface of the first holding portion 4 provided on one end side of the substrate portion 2, the length of the held corrugated tube 10 is increased. A positional shift in the vertical direction can be prevented. Moreover, since the bending part 6 inserted in the slit 13 of the corrugated tube 10 is provided in the circumferential end of the 1st holding | maintenance part 4, the position shift (rotation) to the circumferential direction of the corrugated tube 10 can also be prevented. it can. Furthermore, since the second holding part 7 provided on the other end side of the substrate part 2 is shaped to be fitted and held across the slit 13 of the corrugated tube 10, the first holding part 4 can be held together with the stable holding of the corrugated tube 10. The opening of the slit 13 into which the bent portion 6 is inserted can be prevented.

  That is, according to the above configuration, the corrugated tube 10 held by the first and second holding portions 4 and 7 in the length direction can be used without the tape winding between the corrugated tube 10 and the substrate portion 2 that has been necessary in the past. Further, since the displacement in the circumferential direction and the opening of the slit 13 can be easily prevented, the clamp 1 can be attached to the corrugated tube 10 with good workability regardless of the skill level of the operator.

DESCRIPTION OF SYMBOLS 1 Clamp for corrugated tubes 2 Substrate part 3 Car body locking part 4 First holding part 5 Rib 6 Bending part 7 Second holding part 10 Corrugated tube 11 Mountain part 12 Valley part 13 Slit

Claims (3)

A clamp that is attached to a corrugated tube in which crests and troughs that are continuous in the circumferential direction are alternately continued in the length direction and slits are continuously provided in the length direction, and along the length direction of the corrugated tube It is a resin molded product provided with a rectangular substrate part to be placed and a vehicle body locking part that protrudes from the center part in the length direction of the substrate part,
A semi-annular first holding part and a second holding part that are fitted over a half circumference of the corrugated tube project from the end in the length direction of the substrate part,
A rib that fits in the circumferential direction on the inner peripheral surface of the first holding portion in the corrugated tube and is inserted into the slit of the corrugated tube at one end in the circumferential direction of the first holding portion. A clamp for a corrugated tube, wherein the second holding portion is configured to be fitted and held on the corrugated tube without tape winding so that the second holding portion is fitted and held across the slit.   In the state where the first and second holding portions hold the corrugated tube, the outer peripheral dimension of the corrugated tube from the end portion in the length direction of the second holding portion to the slit is determined by the bending of the first holding portion. The center angle θ of the arc forming the second holding portion is set to 180 ° <θ <280 °, which is smaller than the outer peripheral dimension of the corrugated tube from the end portion on the side where no portion is provided to the slit. Clamp for corrugated tube as described.   The inner peripheral surface of the second holding portion is a smooth surface without providing ribs, and is fitted externally so as to press the outer peripheral surface of the peak portion of the corrugated tube inward. Clamp for corrugated tube as described.

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