JP5471486B2 - Band clamp for wire harness - Google Patents

Description

  The present invention relates to a band clamp for a wire harness, and more particularly, to improve a cut end generated after cutting a surplus portion of a band fastened to a wire harness.

In many cases, band clamps are used to bind a group of electric wires to be wired in an automobile or the like as a wire harness and to fix the bundled wire harness to a vehicle body panel or the like.
As shown in FIGS. 8 (A) and 8 (B), the band clamp 100 includes a band portion 101 that is wound around a plurality of electric wires W and fastened, and a clamp portion 102 that is inserted and locked into a through hole of a vehicle body panel. It consists of a provided resin molded product.

The band clamp 100 has a band portion 101 wound around an electric wire W, tightened through a through hole 103a provided in a main body 103, and a locking claw 101a provided in the band portion 101 protruding from an inner surface surrounding the through hole 103a. It is locked by a stop piece (not shown).
Since the band portion 101 is formed to be relatively long so that it can be applied to a wire harness having a large diameter, as shown in FIG. 8B, the band portion 101 pulled out from the through hole 103a is The surplus portion is cut and removed with a nipper or the like, leaving the required drawer dimensions.

As shown in FIG. 8B, the cut end surface cut by the band portion 101 becomes an edge E with sharp corners at both ends in the width direction.
In order to route the band clamp 100 attached to the wire harness along the vehicle body and fix it to the vehicle body, the clamp portion 102 of the band clamp 100 is inserted and locked into the through hole of the vehicle body panel. The edge E of the tip end face of the band unit 101 is likely to hit the hand, so that it is easy for an operator to be injured and further to be damaged.

  With respect to this problem, the present applicant disclosed in Japanese Patent Application Laid-Open No. 2003-180023 as shown in FIGS. 9 (A) and 9 (B) that the thin portion 110 is formed with a gap C at both ends in the width direction of the band portion 101. In the state formed in the longitudinal direction and the surplus portion is cut, the thin-walled portions 110 that are easily bent are positioned on the outer surfaces at both ends in the width direction of the band portion 101, and the edges at both ends of the cut surface are the edges that are easily bent.

JP 2003-180023 A

  As in Patent Document 1, even if an edge that is easy to hit the worker's hand is provided in the thin wall portion 110 to bend easily, the worker feels pain at the moment when the edge contacts the hand. However, there may be pain and scratches at the edges so that scratches may occur on the hand, and there is room for improvement in that respect.

  The present invention has been made in view of the above problems, and it is an object of the present invention to improve workability by preventing an edge from being generated at the cut end.

In order to solve the above-described problems, the present invention extends from a box-shaped main body, a body locking clamp projecting from the outer surface of the main body, and an edge of one side opening of a band through hole provided in the main body. It is made of a resin molded product having an existing band part, and is provided with a locking groove continuously in the band part, and a locking piece protrudes from the inner surface of the peripheral wall surrounding the band through hole. The band portion wound around the wire group, inserted through the band through-hole and pulled, and selectively locked by locking the locking piece in the locking groove of the band portion, and pulled out from the through-hole after the fastening A wire harness band clamp for cutting the surplus portion of
A 1/4 arc rib is provided continuously in the length direction along both side edges in the width direction of the band portion, and the 1/4 arc rib has a perfect circle or a surface facing the leading end of the band portion on the drawing side. The ellipse is a quarter arc and the opposite side is a straight surface .
The band portion that is wound and fastened around the wire harness is cut in the band portion in either the state in which the excess portion is cut straight in the width direction or the state in which the surplus portion is cut in an oblique direction with respect to the width direction. Provided is a band clamp for a wire harness characterized in that the angles θ1 and θ2 formed by the cut line and the tangent line of the cut end at the both end corners in the width direction of the end face are arcs exceeding 90 degrees and no edge is generated .

As described above, ¼ arc ribs are provided along both side end surfaces in the width direction of the band portion, so that the corners of both end surfaces in the width direction exceed 90 degrees regardless of where the band portion is cut. It becomes an arc surface and no edge is generated. Further, in both cases where the cutting direction is straight cut in the width direction orthogonal to the length direction of the band portion and in the case of oblique cutting, both end faces in the width direction can be arcuate surfaces, and no edge is generated .

  The locking groove is continuously provided in the central portion in the width direction of the band portion, while the locking piece protrudes from the inner surface of the upper wall of the main body, and the vehicle body locking is provided on the outer surface of the upper wall. A clamp portion is provided so as to project and a central portion in the width direction of the band portion is locked with a locking piece.

Alternatively, while the adjacent gap of the 1/4 arc rib is a locking groove that is continuously provided in the band portion, the locking piece protrudes from the inner surface of both side walls of the main body, and the band portion is formed by side lock. It is set as the structure which latches.
As described above, when the band clamp is a side lock type, the ¼ arc rib provided in order not to generate the edge can also be used for locking. And if it is this side lock structure, the whole height of a band clamp can be made low and it can use suitably, when there is no space margin in the wiring space of a wire harness.

In the band clamp for a wire harness of the present invention having the above-described configuration, the ¼ arc ribs are continuously provided in the length direction on both sides in the width direction of the band portion, so that the band portion is passed through the band through hole of the main body. After pulling and fixing, the band cut end face that occurs when the band part pulled out from the band through-hole is cut by the extra length is formed on both sides in the width direction of the band cutting end face with an arc surface exceeding 90 degrees , and the sharp edge Does not occur. Therefore, when the wire harness is routed in the automobile and the clamp part of the band clamp is fixed to the vehicle body, even if the operator's hand touches the cut end surface of the band part, pain or scratches occur at the edge. There is nothing, and work efficiency can be increased.

The band clamp of 1st embodiment of this invention is shown, (A) is a perspective view, (B) is an enlarged view of a band part, (C) is sectional drawing of a main body. The principal part of a band part is shown, (A) is a partial perspective view, (B) is principal part expansion explanatory drawing. It is a perspective view of the state which wound around the electric wire group and cut | disconnected the excess band part. (A)-(D) is drawing which shows the state from which the cutting | disconnection position of the length direction of a rib differed while cut | disconnecting a band part in the width direction. (A)-(C) are drawings which show the state where the cutting position of the length direction of a rib differed while cutting a band part in the slanting direction to the width direction. The comparative example when a rib is made into semicircle shape is shown, (A) and (B) are the drawings which show the state which cut | disconnected straight in the width direction and made the cutting position of the length direction of a rib different, (C) (D) (E) is drawing which shows the state from which the cutting position of the length direction of the rib differed while cut | disconnecting a band part in the diagonal direction with respect to the width direction. It is the schematic of the band clamp of 2nd embodiment of this invention. (A) (B) is drawing which shows a prior art example. (A) and (B) are drawings showing other conventional examples.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 5 show a first embodiment.

  As shown in FIG. 1, the band clamp 1 includes a box-shaped main body 2, a vehicle body locking clamp portion 3 protruding from the upper surface of the main body 2 in the drawing, and the main body 2 penetrating in the left-right direction in the drawing. It is made of a resin molded product integrally provided with a band portion 5 extending from the edge of one side opening of the band through-hole 4 provided. One side opening of the band through hole 4 serves as an outlet 4a, and the other side opening facing the band through hole 4 serves as an inlet 4b.

  A locking groove 5a is provided continuously in the length direction at the center of the band portion 5 in the width direction. On the other hand, a locking piece 6 protrudes from the inner surface of the upper wall of the peripheral wall surrounding the band through hole 4 of the main body 2, the band portion 5 is wound around the electric wire group, inserted into the band through hole 4, and pulled. The locking piece 6 is selectively locked and fastened to the locking groove 5a. After the fastening, the surplus portion of the band portion 5 drawn out from the band through hole 4 is cut with a nipper or the like as in the conventional example.

As shown in an enlarged view in FIG. 2 along both side edges of the band portion 5 in the width direction, the 1/4 arc ribs 10 and 10 are integrally formed continuously in the length direction. The quarter arc ribs 10 on both sides have a surface facing the leading end 5e of the band portion 5 as a perfect circle or an ellipse quarter arc surface 10a, and the opposite side is a straight surface 10b. In the present embodiment, a ¼ arc surface of a perfect circle is formed, and the other one side straight surface 10 c constituting the ¼ arc rib is continuous with both end surfaces of the band portion 5.
Radius of the quarter-arc ribs 10 that have a range of 0.5 mm to 1.5 mm.

  The clamp part 3 of the band clamp 1 has the same shape as the conventional one. That is, the plate portion 3a is projected from the upper surface of the main body 2, the support shaft portion 3b is erected from the center of the bottom surface of the plate portion 3a, and the locking blade portion is folded back from the opposite position of the tip of the support shaft portion 3b. 3c protrudes and the latching step part 3d is provided in the front-end | tip of this latching blade part 3c.

  As shown in FIG. 3, the band clamp 1 having the above-described shape is formed by winding a band portion 5 around a plurality of electric wires W constituting a wire harness, passing the band portion 5 through the band through hole 4, and pulling out the band through hole 4. The excess part of the part 5 is cut with a nipper or the like.

Even if the cut end surface 5X of the band part 5 of the cut band clamp 1 is cut straight in the width direction at any position, or cut obliquely with respect to the width direction, both side edges in the width direction Becomes a circular arc exceeding 90 degrees , and no sharp edge is generated.

Specifically, as shown in FIGS. 4A to 4D, when cutting in the width direction, cut at any position from the arc side tip of the ¼ arc rib to the other side of the straight line at the other end. However, the angle θ formed by the cutting line and the tangent to the cutting end is an arc exceeding 90 degrees. Further, as shown in FIGS. 5A to 5C, the angles θ1 and θ2 formed by the cut line in the width direction and the tangent line of the cut end are 90 degrees even when an oblique cut that is oblique to the width direction is made. An arc that exceeds

The wire harness to which the band clamp 1 is attached is routed in an automobile, and the clamp portion 3 of the band clamp 1 is inserted and locked in a locking hole (not shown) provided in the vehicle body panel.
When the operator grips the main body side of the band clamp 1 at the time of the operation, even if the edge in the width direction of the cut end surface 5X of the band portion 5 comes into contact with the operator's hand, there is no edge. There is no generation of pain and scratches caused by contact with, and workability can be improved.

  In addition, instead of providing 1/4 arc ribs on both sides of the band portion 5 in the width direction, 1/2 arc ribs (semicircular ribs) can be provided. In that case, FIG. The angle θx when cut in the width direction shown in B), and the angles θy and θz when obliquely cut as shown in (C), (D), and (E) cause an arc of 90 degrees or less depending on the cutting position. In the present invention, the arc is a ¼ arc rib because the arc may have an edge shape.

FIG. 7 shows a second embodiment.
The second embodiment is a side lock band clamp.
1/4 arc ribs 10 provided continuously in the length direction on both sides in the width direction of the band portion 5 are used as both sides of the locking groove 20. That is, the linear side 20a of one locking piece adjacent to the length direction and the arc side 20b of the other locking piece are both sides constituting the deformed V-groove. Therefore, no locking groove is provided in the central portion of the band portion 5 in the width direction.

  On the other hand, a pair of locking pieces 21 </ b> A and 21 </ b> B that are inserted and locked into the locking groove 20 from the inner surfaces of the front and rear walls of the peripheral wall surrounding the band through hole 4 of the main body 2 are provided. Since the main body 2 is not provided with a locking piece protruding in the vertical direction, the height H of the main body 2 is lower than that of the first embodiment.

As in FIG. 3 of the first embodiment, the band portion 5 is wound around the wire group, passed through the band through hole 4, pulled out and pulled to be locked in the locking grooves 20 on both sides in the width direction of the band portion 5. The pieces 21A and 21B are inserted and locked, and the electric wire group is fastened and fixed by a side lock. Thereafter, the surplus band portion 5 is cut, but arcs exceeding 90 degrees are formed on both side edges in the width direction of the cut surface as in the first embodiment, and no edge is generated.

DESCRIPTION OF SYMBOLS 1 Band clamp 2 Main body 3 Clamp part 4 Band through-hole 5 Band part 5a Locking groove 6 Locking piece 10 1/4 Arc rib 10a 1/4 Arc surface 10b Straight surface W Electric wire

Claims (3)

From a resin molded product having a box-shaped main body, a clamp portion for locking a vehicle body protruding from the outer surface of the main body, and a band portion extending from an edge of one side opening of a band through hole provided in the main body The band portion is provided with a locking groove continuously, a locking piece is projected from the inner surface of the peripheral wall surrounding the band through hole, and the band portion is wound around the wire group and inserted into the band through hole. Then, the band clamp for the wire harness that cuts the surplus portion of the band portion that is pulled out from the through hole after the fastening is performed by selectively locking and fastening the locking piece in the locking groove of the band portion. Because
A 1/4 arc rib is provided continuously in the length direction along both side edges in the width direction of the band portion, and the 1/4 arc rib has a perfect circle or a surface facing the leading end of the band portion on the drawing side. The ellipse is a quarter arc and the opposite side is a straight surface.
The band portion that is wound and fastened around the wire harness is cut in the band portion in either the state in which the excess portion is cut straight in the width direction or the state in which the surplus portion is cut in an oblique direction with respect to the width direction. A band clamp for a wire harness, characterized in that the angles θ1 and θ2 formed by the cut line and the tangent line of the cut end at the both end corners in the width direction of the end face are arcs exceeding 90 degrees and no edge is generated .   The locking groove is continuously provided in the central portion in the width direction of the band portion, while the locking piece protrudes from the inner surface of the upper wall of the main body, and the vehicle body locking is provided on the outer surface of the upper wall. The band clamp for a wire harness according to claim 1, wherein a clamp portion is provided so as to project and a central portion in the width direction of the band portion is locked with a locking piece.   While the adjacent gap of the 1/4 arc rib is used as a locking groove that is continuously provided in the band portion, the locking piece projects from the inner surface of both side walls of the main body, and the band portion is engaged by a side lock. The band clamp for a wire harness according to claim 1, wherein the band clamp is configured to be stopped.

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