JP2003324827A - Band clamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent displacement of a wire from a band clamp. <P>SOLUTION: A second side rib 28 is fitted in a protruding manner along both side end edges, in a width direction at a band base end 22 which continues to a buckle section 11 of a band part 21 of the band clamp 10, and one or a plurality rows of intermediate pressure ribs 29 are fitted at a position sandwiched by the second side rib 28, in a protruding manner at a clearance in the width direction. Both protruding amounts H2 of the second side rib 28 and the intermediate pressure ribs 29 are made the same, and made larger than a protruding amount H1 of the first side rib 26, which is fitted at the band body part 23 in a protruding manner. Front ends of the second side rib 28 and the intermediate pressure ribs 29 of the band base end part 22 are pressed against the surfaces of a few (one to three) wires w, around which the band part 21 is wound, thus preventing displacement of the wires. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a band clamp for binding wire harnesses and the like and fixing them at a predetermined position, and more particularly to a band clamp suitable for binding wire harnesses and the like having a small diameter.

[0002]

2. Description of the Related Art A band clamp is used for positioning and fixing a wire harness to be installed in an automobile at a predetermined position of a vehicle body. Generally, a band part around which an electric wire is wound and a band part in a bound state are bundled. The buckle part to fix,
It is composed of a clip portion for locking the vehicle body, which protrudes from one end of the buckle portion. At both edges of the band portion in the width direction, side ribs in the length direction are provided only on one surface side, and the side ribs bite into the surface of the electric wire to prevent the electric wire from being displaced due to skidding.

However, since the band portion is hard to bend due to the side ribs, when the diameter of the electric wire is small, the side ribs cannot be sufficiently bitten into the surface of the electric wire, and there is also a problem that the position is easily displaced. With respect to this problem, in Japanese Patent Laid-Open No. 7-279911, as shown in FIG. 12 (A), an intermediate rib 5 formed of a small protrusion is provided at a substantially central portion of the base end portion 4 of the band portion 3 which is close to the buckle portion 2. A band clamp 1 is proposed in which a plurality of protrusions are provided and the protrusion amount of the intermediate rib 5 is larger than the protrusion amount of the side rib 6, as shown in FIG. 12 (B).

[0004]

However, when the number of electric wires is small or the diameter of the electric wires is small, only the base end portion 4 of the band portion 3 is wound around the electric wire. The tip of the intermediate rib 5 bites into the surface of the electric wire, but the side rib 6 having a small amount of protrusion cannot contact. Therefore, the skid suppression force for these thin wire harnesses only works at the center of the band,
Since the pressing area of the rib against the electric wire is small, there is a problem in that the side slip prevention effect cannot be sufficiently obtained.

The present invention has been made in view of the above problems, and a band clamp capable of stably positioning and fixing the electric wire at a predetermined position by exerting a high skid suppressing force even when a wire harness having a small diameter is bundled. Is an issue.

[0006]

In order to solve the above-mentioned problems, the present invention provides a buckle portion provided with a band through hole and a locking piece projecting into the band through hole, and extending from the buckle portion. A band clamp in which a band part and a clip part for locking a vehicle body which is provided so as to project from the outer surface of the buckle part are integrally formed, wherein the band part is a band base end part continuous with the buckle part, and the band. The band main body portion is continuous with the base end portion, and the band main body portion is provided with first side ribs extending along both widthwise end edges, and the band base end portion has both widthwise end edges. Along with the second side ribs, and one row or a plurality of rows of intermediate pressing ribs are projected at a position sandwiched by the second side ribs at intervals in the width direction, and are formed at the band base end portion. The protruding amount of the 2nd side rib and the intermediate presser rib All of them are the same and are larger than the protruding amount of the first side ribs, and the ends of the second side ribs of the band base end portion and the intermediate pressing ribs on the surface of a small number of 1 to 3 wires around which the band portion is wound. (EN) Provided is a band clamp configured so that it can be bundled while pressing the wire to prevent the wires from being displaced.

In the band clamp having the above-mentioned structure, even if the diameter of the wire harness having a small number of electric wires is small, the second side ribs on both side edges in the width direction and the intermediate presser are provided at the band base end portion which can contact the surface of the wire harness. By protruding the ribs with the same protrusion amount, ribs having the same height are arranged in at least three rows in the width direction, and these three rows of ribs do not hinder the wire surface and the wire characteristics. Since the wire is pressed and bited into a certain degree, it is possible to efficiently prevent the electric wire from being laterally displaced. Further, since the protruding amounts of the second side ribs and the intermediate pressing ribs of the band base end portion are larger than the protruding amounts of the first side ribs, the ribs of three or more rows at the band base end portion are stronger than the first side ribs and the surface of the wire. It can bite into and effectively add skid restraining force. Note that the same structure can be applied to a tie band without a clip portion.

It is preferable that the base end portion of the band is within a range of 13 mm or less in the length direction from the joint position with the buckle portion. This is because the range necessary for winding a small number of wires is 13 mm from the joint position with the buckle part, and in the range exceeding 13 mm, sufficient side slip prevention effect can be obtained even by pressing with the first side rib of the band part. This is because In addition, in order to make the band portion easily bendable, it is preferable that neither the second side rib nor the intermediate pressing rib is provided in the base end portion of the band near the joint portion closest to the buckle portion.

The above-mentioned one row or a plurality of rows of intermediate pressing ribs are
A plurality of small protrusions may be formed so as to be spaced apart in the lengthwise direction. In this case, the ribs do not interfere with each other when the band part is wound, because the spaces are provided in the length direction,
Since the band portion is easily bent, the rib can effectively cut into the surface of a small number of electric wires. The shape of the small protrusion of the intermediate pressing rib may be a mountain-shaped cross section, a quadrangular cross section, or a trapezoidal cross section.

Further, the intermediate pressing rib may be provided with one or a plurality of ribs extending in the band extending direction and protruding in a chevron shape in cross section at intervals in the width direction. In this case, since the intermediate presser rib contacts the surface of the electric wire not by a point but by a line, a great side slip prevention effect can be obtained.

The second side rib may be formed by projecting a plurality of small projections at intervals in the lengthwise direction, whereby the band portion is easily bent. The shape of the small protrusion may be a chevron cross section, a square cross section, or a trapezoid cross section.

It is preferable that a cut be provided between the first side rib and the second side rib to divide the side rib. Thereby, the interference between the first side rib and the second side rib adjacent to each other can be prevented, and the band portion can be easily bent.

[0013]

DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show a band clamp 10 according to a first embodiment of the present invention. The band clamp 10 includes a buckle portion 11, a band portion 21 extending from the buckle portion 11, and the band portion 21. The clip portion 31 for locking the vehicle body is provided so as to project from the outer surface of the buckle portion 11 on the opposite side.

The band clamp 10 is integrally formed of polypropylene. For details, as shown in FIG.
The buckle portion 11 is provided with a band through hole 12 and a locking piece 13 protruding into the band through hole 12, and the clip portion 31 is a stabilizer 32 projecting from the buckle portion 11 in a dish shape, and the stabilizer 32. Of the shaft portion 32 projecting from the central portion of the shaft and the locking blade 34 projecting from the shaft portion 33 by folding back at the tip of the shaft portion 33.
The locking blade 34 is locked in a mounting hole (not shown) formed in the vehicle body or the like.

The band portion 21 is, as shown in FIG.
The band base end portion 22 is continuous with the buckle portion 11 and the band main body portion 23 is continuous with the band base end portion 22. The band base end portion 22 includes the band portion 21 and the buckle portion 1.
It is within the range of 13 mm in the length direction from the joint 24 with 1. Further, the thickness of the entire band portion 21 is evenly 0.5.
mm. On the winding main body 23, the first side ribs 26 are formed on the winding surface side along both widthwise end edges.
And the protrusion amount H1 of the first side rib 26 from the surface of the band portion 21 is 0.5 mm. Further, on the opposite surface of the band main body portion 23, an engagement tooth row 27 that can engage with the locking piece 13 of the buckle portion 11 at a predetermined position is formed. Of the band base end portion 22, the buckle portion 21
The second side rib along the widthwise both end edges on the winding surface side of the portion excluding the range of 4 mm in the length direction from the joining portion 24 with the buckle portion 21, that is, the portion excluding the closest portion 25 with the buckle portion 21. In addition to projecting 28, one row of intermediate pressing ribs 29 is projecting in the lengthwise direction at substantially the center of the portion sandwiched by the second side ribs 28 at both ends. This second side rib 28
Both the intermediate pressing rib 29 and the small presser rib 29 are provided with small protrusions 28a, 29a having a trapezoidal cross section as shown in FIG. 3 at two intervals in the lengthwise direction and in two rows in the widthwise direction. ing. The protrusion amounts H2 of the small protrusions 28a, 29a from the surface of the band base end portion 22 are the same as shown in FIG. 4, and the protrusion amount H2 of the first side rib 26 is the same.
It is set within the range of 0.8 mm or more and 1.2 mm or more, which is larger than 1, and is 1 mm in the present embodiment. Further, the first side rib 26 and the second side rib 28 are separated by inserting a notch 30 therebetween.

In the band clamp 10 having the above-mentioned structure, the band base end portion 22 which is a portion which always contacts even when winding a wire having a small diameter is provided with the second side rib 28 having the small protrusions 28a and 29a having the same protruding amount. The intermediate presser rib 29 is formed. Therefore, even when one to three electric wires w are wound, as shown in FIGS. 5A and 5B, the second side ribs 28 are formed in two rows in the circumferential direction and three rows in the width direction. The intermediate presser ribs 29 press the surface of the electric wire w and bite into the wire appropriately, and in particular, in the width direction in which there is a possibility of misalignment, a total of three rows on both sides of the band and the central portion exert an equal skid suppressing force. Since it can be done, the electric wire w of the band clamp 10
It is possible to prevent the positional deviation with respect to. Also, the first
The second side rib 28 is larger than the protrusion amount H1 of the side rib 26.
Since the protrusion amount H2 of the intermediate pressing rib 29 is large, the rib at the base end portion of the band preferentially digs into the surface of the wire more strongly than the first side rib, so that the skid suppressing force is always effectively applied to the wire. be able to.

Further, the buckle portion 1 of the band base end portion 22.
No rib is formed on the closest portion 25 to 1 and a space is also provided between the small protrusions 28a and 29a and between the first side rib 26 and the second side rib 28. Even when wound around a thin electric wire, it can be bent greatly from the base of the band base end portion 22, and
Since the ribs do not interfere with each other, the band portion 21 can be flexibly bent, and the ribs 28 and 29 can be effectively pressed against the surface of the electric wire.

6 to 8 show the band base end portions 22 of the first, second and third modifications of the first embodiment. In the first modified example shown in FIG. 6, the positions of the small protrusions 28a of the second side ribs 28 and the small protrusions 29a of the intermediate pressing ribs 29 are displaced in the length direction and arranged in a staggered manner. In the second modification shown in FIG. 7, the small protrusion 28a of the second side rib 28 is used.
And three small protrusions 29a of the intermediate pressing rib 29 are formed at intervals in the length direction. Third shown in FIG.
In the modified example, two rows of intermediate pressing ribs 29 are provided so as to project in the width direction at intervals. These first to third modifications differ from the first embodiment in the above points, but are the same in other points.

The second side ribs 28 and the intermediate pressing ribs 29 are small protrusions 28 having a chevron cross section as shown in FIG. 9 (A).
b or 29b, or the small projections 28c and 29c shown in FIG. 9B having a rectangular cross section.

10 (A), (B) and FIG. 11 show the essential parts of a band clamp 10 'according to the second embodiment of the present invention. In the present embodiment, the band base end portion 2
Two second side ribs 28 'are provided so as to project along both side edges of the width direction 2', and two intermediate pressing ribs 29 'are sandwiched between the two second side ribs 28'. Is different from the first embodiment in that it is protruded at intervals in the width direction, but in other respects it is the same as the first embodiment, so the same reference numerals are given and description thereof is omitted.

As shown in FIG. 10B, both the second side ribs 28 'and the intermediate pressing ribs 29' have a chevron cross section, and the protrusion amounts H3 thereof are the same.
The protrusion amount H3 is set to 1 mm, which is larger than the protrusion amount H1 of the first side rib 26.

When a small number of electric wires w are wound by the band clamp 10 'having the above structure, the second side ribs 28' and the intermediate presser ribs 29 'are pressed linearly in the circumferential direction on the surface of the electric wire w. As shown in FIG. 11, since the electric wires w bite into a total of four rows in the width direction, it is possible to prevent the electric wire w from being displaced due to skidding. Needless to say, the number of intermediate pressing ribs 29 'may be one or three or more depending on the band width.

The present invention is not limited to the above embodiment, and for example, the intermediate pressing rib and the second side rib may have different shapes. The band clamp may be made of nylon instead of polypropylene.

[0024]

As is apparent from the above description, according to the present invention, of the band portion of the band clamp, the band base end portion which is always in contact with the surface of the wire even when wound around the wire having a small winding diameter. By projecting side ribs and intermediate pressing ribs having the same amount of protrusion, the surface of the thin electric wire can be pressed by at least three rows or more of ribs in the width direction, and the sideslip suppressing force can be equally applied. It is possible to effectively prevent the position shift of the electric wire with respect to the clamp, which is a problem in the case of the electric wire.

Further, since the protrusion amount of the ribs at the band base end portion is larger than the protrusion amount of the first side ribs of the band main body portion, the ribs at the band base end portion are preferentially stronger than the first side ribs and the surface of the electric wire. By pressing, it is possible to always apply a strong side slip suppressing force to the wire.

[Brief description of drawings]

FIG. 1 is a main part perspective view showing a band clamp according to a first embodiment of the present invention.

FIG. 2 is an overall plan view of the band clamp shown in FIG.

FIG. 3 is an enlarged view of a main part of the band unit shown in FIG.

4 is a sectional view taken along line IV-IV of FIG.

FIG. 5 shows a state in which the band clamp shown in FIG. 1 is wound around an electric wire, (A) is an enlarged front view of a main part, and (B) is a front view.
FIG. 4 is a cross-sectional view of a small protrusion portion in the width direction.

FIG. 6 is an enlarged view of an essential part showing a band base end portion of a first modified example.

FIG. 7 is an enlarged view of an essential part showing a band base end portion of a second modified example.

FIG. 8 is an enlarged view of an essential part showing a band base end portion of a third modified example.

9A and 9B are enlarged perspective views showing another shape of the small protrusion.

FIG. 10 shows a band clamp according to a second embodiment of the present invention, (A) is a perspective view showing a band base end portion, and (B) is a cross-sectional view of the band base end portion.

11 is a cross-sectional view showing a state in which the band clamp shown in FIG. 10 is wrapped around an electric wire.

12A and 12B are views showing a conventional example.

[Explanation of symbols] 10, 10 'band clamp 11 Buckle part 21 Band 22, 22 'Band base end 23 Band body 26 1st side rib 28, 28 'Second side rib 28a, 28b, 28c Small protrusion 29, 29 'Intermediate presser rib 29a, 29b, 29c Small protrusion 31 Clip part

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) F16L 3/137 F16L 3/12 EF term (reference) 3H023 AA04 AB01 AD08 AD19 AE08 3J022 DA15 EA16 EB02 EB14 EC14 EC22 ED26 FA05 FB03 FB05 FB12 FB16 GA04 GA16 GA22 GB43 GB45 GB56 GB77 3J036 AA03 BA01 BB06 DA14 DB04 5G363 AA04 AA20 DA16 DC02

Claims (6)

[Claims] 1. A buckle portion having a band through hole and a locking piece protruding from the band through hole, a band portion extending from the buckle portion, and a vehicle body locking projecting from an outer surface of the buckle portion. A band clamp integrally formed with a clip part for use, wherein the band part includes a band base end part continuous with the buckle part and a band main body part continuous with the band base end part. Is provided with a first side rib extending along both widthwise end edges, and a band base end portion is provided with a second side rib protruding along both widthwise end edges,
One row or a plurality of rows of intermediate pressing ribs are projected at a position sandwiched by the second side ribs at intervals in the width direction, and the protruding amount of the second side rib and the intermediate pressing rib formed at the base end portion of the band is , Both are the same, and the first
The protrusion amount of the side ribs is made larger, and the tips of the second side ribs of the band base end portion and the intermediate pressing ribs are pressed against the surface of a few electric wires around which the band portion is wound to prevent the electric wire from being displaced. Band clamp with a structure that can be bound in a state. 2. The band clamp according to claim 1, wherein the base end portion of the band is in a range of 13 mm or less in a band extending direction from a joint position with the buckle portion. 3. The band clamp according to claim 1, wherein the one row or a plurality of rows of the intermediate pressing ribs are formed by providing a plurality of small projections at intervals in the length direction. . 4. The intermediate pressing rib according to claim 1 or 2, wherein the intermediate pressing rib is a protrusion having a mountain-shaped cross section and extending in the band extending direction, and one or more protrusions are provided at intervals in the width direction. Band clamp. 5. The second side rib is formed by projecting a plurality of small protrusions at intervals in the lengthwise direction.
The band clamp according to claim 4. 6. The band clamp according to claim 1, wherein a notch is provided between the first side rib and the second side rib to divide the band clamp.