JP2012143105A - Band clamp for wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a dimension of a wire harness to which a band clamp is mounted, projecting from a vehicle body panel, and enhance wire harness holding force by a band.SOLUTION: An upper wall of a body is formed by a dish part of a clamp part, and a band through hole penetrating in right and left directions is surrounded by the upper wall, a lower wall and front and rear walls. A lock projection is protruded from the lower wall or the upper wall toward the band through hole, and is selectively locked on a lock groove installed in a band part. A center of the lock position and a center of a vehicle fixation position of the clamp part are disposed on the same line, and wire harness pressing pieces inclined downwardly toward an inlet side of the band through hole are protruded at lower ends of the outer faces of the front and rear walls so as to enable displacement. In the band part, a bending part is installed at a continuing portion to an outlet periphery of the band through hole of the body. The lower wall of the body is brought into close contact with an outer peripheral face of a wire harness held by winding the band part and continues to both right and left sides of the lower wall, the wire harness pressing pieces and the bending part of the band part are brought into close contact with the outer peripheral face of the wire harness.

Description

  The present invention relates to a band clamp for a wire harness, and in particular, a protruding amount of a wire harness held by a band clamp from a vehicle body panel surface in a state where the wire harness arranged in the vehicle body is locked to the vehicle body panel using the band clamp. This makes it possible to wire the wire harness without difficulty in a narrow wiring space.

A band clamp is used to bind a group of electric wires to be wired to an automobile as a wire harness and to fix the bundled wire harness to a vehicle body panel or the like.
This type of band clamp, as disclosed in Japanese Patent Laid-Open No. 10-339309 etc., is an offset in which the mounting position on the vehicle body panel (so-called anchor position) and the center position of the wire harness held by the band are eccentric. Often referred to as a type.

  Specifically, as shown in FIGS. 8A and 8B, the band clamp 100 has a band 102 protruding from the lower end edge of one end opening of the band through hole 101 a of the main body 101 and from the upper surface of the main body 101. A clamp 103 is projected. After the band 102 is wound around the wire harness 110 and inserted from the other end opening of the band through hole 101a, the band 102 is pulled, and the elastic locking piece 101b protruding from the upper wall surrounding the band through hole 101a is locked. The claw 101c is locked and locked in a locking groove 102a provided in the band 102, and the wire harness 110 is fastened. The wire harness 110 is routed in the vehicle body, and the clamp 103 of the band clamp 100 is inserted and locked in the mounting hole 51 of the vehicle body panel 50.

Since the clamp 103 protrudes from the center of the main body 101, the anchor center P <b> 1 where the clamp 103 is fixed to the vehicle body panel is located on the center line of the main body 101.
On the other hand, the locking claw 101c that locks with the locking groove 102a of the band 102 is not located at the center of the main body 101 but is eccentric to the band projecting side of the band through hole 101a. The center Pa of the wire harness 110 held by the band 102 is not positioned on the same line as the lock claw 101c and the lock center P2 of the lock groove 102a of the band 102. As a result, the center Pa and the lock center P2 of the wire harness 110 are at offset positions that are separated from the anchor center P1 of the clamp 103 by a distance X.

JP 10-339309 A

In the offset type band clamp, the load of the wire harness is applied to the lock position of the offset position, and the wire harness is easily bent in the direction away from the vehicle body panel as shown in FIG. In particular, a thick wire harness having a large outer diameter has a strong force to be pulled toward the wire harness and is easily separated from the vehicle body panel.
Thus, in the offset type band clamp, the protruding dimension of the wire harness from the vehicle body panel surface becomes large, and it is easy to interfere with other parts. In particular, since the number of parts mounted on the vehicle is rapidly increasing and the wiring space for the wire harness is rapidly narrowing, a clamp that can reduce the protruding dimension of the wire harness from the body panel surface is required.

  The present invention has been made in view of the above problems, and provides a wire harness band clamp that allows a wire harness to be routed comfortably in a narrow routing space by minimizing the amount of protrusion of the wire harness from the body panel surface. The challenge is to do.

In order to solve the above-described problems, the present invention provides a box-shaped main body, a clamp for locking a vehicle body protruding from the outer surface of the main body, and a band portion protruding from an outlet edge of a band through hole provided in the main body. In the band clamp consisting of a resin molded product with
The upper wall of the main body is formed by the plate portion of the clamp portion, and the upper wall, the lower wall, and the front and rear walls surround a band through hole penetrating in the left-right direction, and the lower wall or the upper wall is directed toward the band through hole. A locking protrusion is projected from the wall, and the locking protrusion is selectively locked with a locking groove provided in the band portion, and the center of the locking position and the center of the clamping portion of the vehicle body are on the same line. Located in
A wire harness pressing piece inclined downward toward the entrance side of the band through hole is projectingly provided at the lower end of the outer surface of the front and rear walls of the main body so that the band portion can be displaced from the band through hole of the main body. A bent part is provided in a continuous part with the outlet periphery,
The lower wall of the main body is brought into close contact with the outer peripheral surface of the wire harness that winds and holds the band part, and the wire harness pressing piece and the bent part of the band part are continuously provided on the left and right sides of the lower wall. Provided is a band clamp for a wire harness that is configured to be in close contact with the outer peripheral surface of the wire harness.

In the present invention, it is not an offset type in which the wire harness is easily separated from the vehicle body panel surface, but a centering type in which the center of the vehicle body locking position (anchor position) of the clamp portion is matched with the lock position of the band, The wire harness is not easily deformed in the direction away from the body panel surface, so that the protruding dimension of the wire harness is not increased.
In addition, the upper wall of the main body is also used as the plate portion of the clamp portion, so that the upper wall of the main body is eliminated, and the projecting dimension of the wire harness from the vehicle body panel surface is reduced by the thickness of the upper wall.

The wire harness that is wound and held around the band part is brought into close contact with the lower wall of the main body and the wire harness pressing pieces on both sides of the lower wall and the bent part of the band part in a stable state, and the center of the main body and the center of the wire harness And the protruding dimension of the wire harness from the vehicle body panel is prevented from increasing.
In particular, since the wire harness pressing piece can be deformed, it can be deformed so as to be pressed against the outer peripheral surface of the wire harness even if the outer diameter of the wire harness is different. Therefore, in both cases where the wire harness has a small diameter and a large diameter, the outer peripheral surface of the wire harness can be held in contact with the lower wall of the main body without generating a gap between the wire harness and the band portion. The protrusion dimension of the wire harness from the vehicle body panel can be reduced.

The wire harness pressing piece protruding from the outer surface of the front and rear walls of the main body is provided with a slit between the inclined front end and the front and rear walls, and the wire harness pressing piece corresponding to the outer diameter of the wire harness While is displaced
A rib that presses against the outer peripheral surface of the wire harness is projected on the inner surface side of the bent portion of the band portion, and the lower wall of the main body, the wire harness pressing piece, and the rib of the bent portion of the band portion are connected to the band portion. It is preferable to make it the structure which presses and adheres to the outer peripheral surface of the wire harness which winds.

More specifically, the wire harness pressing piece is L-shaped, the L-shaped vertical axis portion is continuous with the outer surface of the main body, the horizontal axis portion is inclined toward the distal end side, and the slit is provided between the outer surface of the main body. Is preferred.
In this way, the lower wall of the main body and both the left and right sides sandwiching the lower wall are pressed against the outer surface of the wire harness, and the anchor position, the band lock position, and the center position of the wire harness are centered. Therefore, the wire harness is firmly held by the band portion, and it is possible to prevent the positional deviation from occurring in the direction away from the vehicle body panel surface. As a result, it is possible to eliminate the possibility that the wire harness contacts the external interference material and is damaged.

  It is preferable that the locking protrusion is provided on the upper surface of the lower wall of the main body, and the locking groove is positioned on the lower surface of the band portion inserted through the band through hole.

  With the above configuration, even if the lower wall of the main body is bent in the direction away from the upper wall of the vehicle body panel due to the load of the wire harness, a locking projection that locks the band portion is protruded from the lower wall of the main body. Locking reliability can be improved without the locking between the locking groove and the locking projection of the band being released.

  The dish part of the clamp part is pressed against the surface side of the vehicle body panel and absorbs the dimensional difference in the thickness of the vehicle body panel. The dish portion has an oval shape or a circular shape, and a flat central bottom portion serves as an upper wall of the main body. A thin projecting portion is provided from the peripheral edge of the central bottom portion which is the upper wall of the main body, and the projecting portion is pressed against the surface of the vehicle body panel as having flexibility.

  The clamp part includes, for example, a pair of front and rear support columns projecting from the surface of the dish part, a bridging part connecting the tips of the support pillars, a pair of locking blades projecting from the left and right sides of the bridging part, The shape is provided with a locking step provided on the lower outer surface of these locking blades, and the locking step is locked to the periphery of the locking hole of the vehicle body panel.

In the band clamp for a wire harness of the present invention having the above-described configuration, the center of the attachment position of the clamp portion to the vehicle body panel (anchor center) matches the lock position of the band wound around the wire harness, and the center position of the wire harness Is centered with the center position of the clamp and the center position of the anchor to the vehicle body panel, so that the center position of the wire harness is displaced and it is difficult to deform in a direction away from the surface of the vehicle body panel, and the upper wall of the body is clamped. The distance from the body panel surface can be reduced by using together with the plate part.
In particular, the bottom wall of the main body is brought into contact with the outer peripheral surface of the wire harness held by the band portion, and the wire harness pressing piece and the bent portion of the band portion are connected to the outer peripheral surface of the wire harness on both sides of the bottom wall contacting portion. Since it is pressed, no gap is generated between the wire harness and the band portion, and the protrusion amount of the wire harness from the vehicle body panel surface can be reduced also from this point.
And since the said wire harness pressing piece can be deform | transformed according to the outer diameter of a wire harness, it can be closely_contact | adhered to the outer peripheral surface of a wire harness, and even if the outer diameter of a wire harness differs, a wire harness and a band part The amount of protrusion of the wire harness from the body panel surface can always be reduced without generating a gap therebetween.

The band clamp of embodiment of this invention is shown, (A) is a perspective view, (B) is a side view, (C) is a front view. It is a principal part enlarged view of FIG. 1 (B). The wire harness pressing piece is shown, (A) is a bottom view of the main body of the band clamp, (B) is an enlarged view of the main part of (A). It is sectional drawing which shows the locked state which hold | maintained the wire harness with the band of a band clamp. (A) is a figure which shows the state which hold | maintains a large diameter wire harness with a band clamp, (B) is a principal part enlarged view. It is drawing which shows the case where a small diameter wire harness is hold | maintained with a band clamp. (A) and (B) are drawings which show a modification. (A) (B) is drawing which shows a prior art example. (A) and (B) are drawings showing conventional problems.

Hereinafter, a band clamp for a wire harness according to an embodiment of the present invention will be described with reference to the drawings. 1 to 6 show a first embodiment.
As shown in FIG. 1, the band clamp 1 includes a substantially box-shaped main body 2, a vehicle body locking clamp portion 3 projecting from the upper surface of the main body 2 in the figure, and penetrates the main body 2 in the left-right direction in the figure. It is made of a resin molded product integrally provided with a band portion 5 protruding from the lower end edge of one side opening of the band through-hole 4 provided. One side opening of the band through hole 4 on the projecting side of the band portion 5 serves as an outlet 4a, and the other side opening facing the band through hole 4 serves as an inlet 4b.

The main body 2 surrounds the band through hole 4 in the left-right direction with the upper wall 2a, the lower wall 2b, and the front and rear walls 2c, 2d, and the left and right sides serve as the entrances 4a, 4b of the band through hole 4, respectively.
The upper wall 2 a is used in combination with a flat central bottom wall portion of a shallow, substantially oval dish portion 3 a constituting the clamp portion 3. That is, the upper and lower thickness is reduced by about 1 mm as compared with the case where the dish portion 3a is used as the upper wall 2a of the main body 2 and the upper wall of the main body 2 is separately formed.

  A locking projection 6 projects from the lower wall 2 b of the main body 2 toward the band through hole 4. The locking projection 6 is provided at the center position of the band through hole 4 and coincides with the center P1 (anchor position) of the vehicle body locking position of the clamp portion 3 protruding from the upper wall 2a of the main body 2. The locking projection 6 has a shape in which a protruding end can be inserted and locked in a locking groove 5 a provided in the band portion 5. The dimensions of the protruding end of the locking projection 6 and the lower surface of the upper wall 2a are substantially the same as the thickness of the band portion 5, and the vertical height of the main body 2 is made as small as possible.

  Further, as shown in FIGS. 1C, 2 and 3, a wire harness pressing piece 10 (10A, 10B) protruding in an L shape is provided at the lower end of the outer surface of the front and rear walls 2c, 2d of the main body 2. Yes. The horizontal shaft portion 10a of the wire harness pressing piece 10 is inclined downward toward the inlet 4b side of the band through hole 4, and a slit 11 is inserted between the horizontal shaft portion 10a and the outer surface of the main body from the protruding end. . On the other hand, the vertical axis portion 10b of the wire harness pressing piece 10 is continuous with the outer surface of the main body, and the horizontal axis portion 10a can be deformed with the vertical axis portion 10b as a support point.

  As a result, as shown in FIG. 5, when the outer diameter of the wire harness 60 is large, the horizontal shaft portion 10 a of the wire harness pressing piece 10 is deformed upward and is in close contact with the outer peripheral surface of the large-diameter wire harness 60. Like to do. On the other hand, as shown in FIG. 6, when the outer diameter of the wire harness 60 is small, the horizontal shaft portion 10 a of the wire harness pressing piece 10 is not deformed and is in close contact with the outer peripheral surface of the small-diameter wire harness 60. I have to.

  The clamp portion 3 connects the shallow oval plate portion 3a, a pair of front and rear column portions 3c and 3c protruding from the surface of the plate portion 3a, and the protruding ends of the column portions 3c and 3c. And a pair of left and right locking blade portions 3b and 3b protruding in a folded shape from both left and right sides of the bridge portion 3d, and a locking step portion 3e on the lower outer surface of the locking blade portions 3b and 3b, 3e is provided. As shown in FIG. 5A, the clamp portion 3 is inserted into the mounting hole 51 of the vehicle body panel 50 from the bridging portion 3d, and the locking step portions 3e and 3e are locked to the peripheral edge on the back surface side of the mounting hole 51. The clamp part 3 is fixed to the vehicle body panel 50.

In the state where the clamp part 3 is attached to the vehicle body panel 50 as described above, the peripheral edge of the dish part 3a is pressed against the surface of the vehicle body panel 50 to absorb the thickness dimensional difference of the vehicle body panel 50.
Therefore, the outer peripheral part surrounding the center bottom wall part of the dish part used as the main body upper wall 2a has thin flexibility.

The band portion 5 has a bent portion 5b connected to the lower end edge surrounding the outlet 4a of the band through-hole 4 of the main body 2 and a band portion 5c connected to the bent portion 5b. In the band portion 5c, the locking groove 5a is continuously provided on one surface 5c-1 which is an inner peripheral surface in a state of being wound around the wire harness 60. Thus, when the band portion 5 c is inserted into the band through hole 4 of the main body 2 from the inlet 4 b, the locking groove 5 a is positioned on the lower surface facing the locking protrusion 6.
In the conventional example in which the locking projection is provided on the upper wall side of the main body, the locking groove provided in the band portion is provided on the surface opposite to the present invention.

The bent portion 5b of the band portion 5 is located at a position where the lower wall 2b of the main body is sandwiched between the wire harness pressing piece 10. A continuous arc is formed by the bent portion 5b of the band portion 5 and the lower wall 2b and the wire harness pressing piece 10, and the arc is brought into close contact with the outer peripheral surface of the wire harness 60 held by the band portion 5 in a stable state. I am doing so.
In addition, a plurality of pressing ribs 5 d are provided on the wire harness contact surface side of the bent portion 5 b of the band portion 5 so that the pressing ribs 5 d bit into the outer peripheral surface of the wire harness 60.

  As shown in FIG. 4, the band clamp 1 according to the present invention has a band portion 5 wound around a large number of electric wires constituting a wire harness 60 and is inserted into a band through hole 4 of the main body 2 from an inlet 4b to an outlet 4a. The lead-out is stopped at a position where a large number of electric wires are strongly bound, and the locking protrusion 6 is locked and locked in the locking groove 5a of the band portion 5, and the wire harness 60 is attached to the band clamp 1. Yes. After attachment, the surplus part of the band part 5 pulled out from the band through-hole 4 is cut with a dedicated tool or the like, as in the conventional example.

As described above, with the band clamp 1 attached to the wire harness 60, the center P2 of the locking position between the locking groove 5a of the band portion 5 and the locking projection 6 of the main body 2 is located at the center of the main body 2. The cross-sectional center position Pa of the wire harness 60 supported by the band portion 5 is located on the same line as the center P2 of the lock position.
Further, the wire harness pressing piece 10, the lower wall 2b of the main body 2, and the bent portion 5b of the band portion 5 are continuous arcs on the outer peripheral surface of the wire harness 60 on which the band portion 5 is wound and held. Pressed as a surface. And the same line as the lock center P2 is located in the center of this circular arc surface.

  The wire harness 60 to which the band clamp 1 is attached as described above is routed in the automobile, and the clamp portion 3 of the band clamp 1 is inserted and locked into the attachment hole 51 formed in the vehicle body panel 50. In this state, the center P1 (anchor center position) of the attachment position of the clamp part 3 is located on the same line as the center position of the main body 2.

As a result, the anchor center position P1 of the band clamp 1 to the vehicle body, the lock center position P2 of the band portion 5 and the wire harness center position Pa are located on the same line and become a centering type instead of an offset type. Therefore, the load of the wire harness 60 and the tensile force applied to the wire harness 60 act on the anchor center position P1, and the wire harness 60 supported by the band portion 5 is firmly held without being displaced from the lock position. .
In addition, the outer periphery of the wire harness 60 around which the band portion 5 is wound and held is continuously formed of the lower wall 2b of the main body 2, the wire harness pressing pieces 10 on both sides sandwiching the lower wall 2b, and the bent portion 5b of the band portion 5. The arcuate surfaces can be brought into close contact with each other in a stable state, and the wire harness 60 can be brought into close contact with the lower wall side of the main body 2 without any gaps.

  As described above, the centering type is used instead of the offset type, and a gap is not formed between the outer periphery of the wire harness and the main body 2, and the upper wall 2 a of the main body 2 is connected to the plate portion 3 a of the clamp portion 3. In combination, the projecting dimension of the main body 2 from the vehicle body panel 50 is also reduced. Due to these multiple factors, the projection dimension H of the wire harness 60 from the vehicle body panel 50 is reduced, the wiring harness 60 can be routed in a narrow routing space, and the wire harness contacts the external interference material. To prevent damage.

The band clamp of the present invention is not limited to the above-described embodiment. As shown in FIG. 7A, the locking projection 6 protruding from the band through hole 4 of the main body 2 protrudes downward from the upper wall 2a. Also good.
In addition, the shape of the dish portion 3a corresponds to the shape of the mounting hole 51 formed in the vehicle body panel 50. When the mounting hole 51 is circular, the dish portion 3a is also formed into a shallow circular shape, and the circular central bottom portion is formed on the main body. Used as a wall.
Further, as shown in FIG. 7 (B), the clamp portion 3 is provided with one column portion 3c protruding from the center of the plate portion 3a, and a pair of folded portions are formed on both sides from the protruding end of the column portion 3c. A locking blade portion 3b may be provided, and a locking step portion may be provided at the lower end of the locking blade portion 3b.

DESCRIPTION OF SYMBOLS 1 Band clamp 2 Main body 3 Clamp part 4 Band through-hole 5 Band part 5a Locking groove 5b Bending part 5d Wire harness pressing rib 6 Locking protrusion 10 Wire harness pressing piece 11 Slit

Claims (3)

In a band clamp made of a resin molded product comprising 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 protruding from an exit edge of a band through hole provided in the main body ,
The upper wall of the main body is formed by the plate portion of the clamp portion, and the upper wall, the lower wall, and the front and rear walls surround a band through hole penetrating in the left-right direction, and the lower wall or the upper wall is directed toward the band through hole. A locking protrusion is projected from the wall, and the locking protrusion is selectively locked with a locking groove provided in the band portion, and the center of the locking position and the center of the clamping portion of the vehicle body are on the same line. Located in
A wire harness pressing piece inclined downward toward the entrance side of the band through hole is projectingly provided at the lower end of the outer surface of the front and rear walls of the main body so that the band portion can be displaced from the band through hole of the main body. A bent part is provided in a continuous part with the outlet periphery,
The lower wall of the main body is brought into close contact with the outer peripheral surface of the wire harness that winds and holds the band part, and the wire harness pressing piece and the bent part of the band part are continuously provided on the left and right sides of the lower wall. Band clamp for wire harness that is configured to be in close contact with the outer peripheral surface of the wire harness The wire harness pressing piece protruding from the outer surface of the front and rear walls of the main body is provided with a slit between the inclined front end and the front and rear walls, and the wire harness pressing piece corresponding to the outer diameter of the wire harness Is displaceable,
A rib that presses against the outer peripheral surface of the wire harness is projected on the inner surface side of the bent portion of the band portion, and the lower wall of the main body, the wire harness pressing piece, and the rib of the bent portion of the band portion are connected to the band portion. The wire harness band clamp according to claim 1, wherein the band clamp is configured to be pressed against and closely contact the outer peripheral surface of the wire harness around which the wire is wound.   The band clamp for a wire harness according to claim 1 or 2, wherein the locking projection is provided on an upper surface of a lower wall of the main body.

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