JP2007198551A - Reinforcement collar - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforcement collar, capable of significantly improving work efficiency in an upward work in attachment of a synthetic resin-made vehicle fixing part to a stud bolt raised on a panel or the like of a vehicle body lower surface. <P>SOLUTION: When each stud bolt 19 raised on the panel 18 of the vehicle body lower surface is inserted to the reinforcement collar 21 mounted on each bracket 11A-11C of a wire harness protector 1, each first locking piece 31 of the collar 21 is pushed down and distorted by the stud bolt 19, and the tip of each first locking piece 31 is fitted and engagingly locked into a threaded groove of the stud bolt 19. A protruding portion 32 raised on the tip side lower surface of each first locking piece 31 abuts on the inner circumferential surface of a second locking piece 33. Thus, the wire harness protector 1 is temporarily fixed while positioning the stud bolt 19 substantially on the central axis of the collar 21. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a reinforcing collar that is mounted in a mounting hole of a mounting portion of a synthetic resin vehicle fixing part that is screwed to a stud bolt standing on a body panel or the like of an automobile.

2. Description of the Related Art Conventionally, various reinforcing collars have been proposed for mounting in mounting holes of mounting portions of synthetic resin vehicle fixing parts that are screwed to stud bolts erected on an automobile body panel or the like.
For example, a metal reinforcing collar mounted on the inner peripheral surface of the mounting hole of a resin fixed part having an mounting portion in which an oval mounting hole is formed, and a belt-shaped metal plate is elongated by bending. There is a reinforcing collar processed into a circular shape (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 2001-300637 (paragraphs (0010) to (0016), FIGS. 1 to 4)

  However, since the reinforcing collar described in Patent Document 1 is formed by forming a band-shaped metal plate into an oval shape by bending, a wire harness protector, a unit box or the like to which the reinforcing collar is attached is synthesized. When attaching resin vehicle fixing parts to stud bolts standing on the panel on the bottom of the vehicle body, after inserting into each stud bolt, hold the vehicle fixing parts with one hand so that they do not fall upward. It is necessary to fix the nuts temporarily and then tighten them, resulting in poor workability and large hand and arm fatigue.

  Accordingly, the present invention has been made to solve the above-described problems, and a stud in which a synthetic resin vehicle fixing part such as a wire harness protector or a unit box is erected on a panel or the like on the lower surface of the vehicle body. When attaching to bolts, it is not necessary to hold the fixed parts for the vehicle with one hand, and the temporary tightening process of the nut can be performed directly without the temporary tightening process of the nut, greatly improving workability in upward work. An object is to provide a reinforcing collar capable of achieving the above.

  In order to achieve the above object, a reinforcing collar according to claim 1 is mounted on an inner peripheral surface of a mounting hole formed in a mounting portion of a synthetic resin vehicle fixing part and inserted through a stud bolt. A pair of stepped portions having an inner diameter larger than that of the cylindrical hole at both end edges in the axial direction of the inner peripheral surface, and a collar body mounted in the mounting hole, and a synthetic resin A locking clip that is formed into a substantially cylindrical shape through which the stud bolt can be inserted and is mounted in the collar body, and the locking clip is formed on the entrance side of the collar body in the insertion direction of the stud bolt. A ring-shaped annular portion to be inserted into one of the stepped portions, and a predetermined length projecting from the inner surface of the annular portion toward the center of the cylindrical hole, and elastically deforming in the insertion direction of the stud bolt Multiple second possible And a plurality of second engagement members that are suspended from the base end portion of each of the first locking pieces to the other stepped portion along the inner peripheral surface of the collar body and elastically deformed radially inward. A locking piece, and a locking protrusion formed to protrude radially outward from the tip of each second locking piece and locked to the other stepped portion, When the stud bolt is inserted, the tip end portion of each first locking piece is fitted and locked in the screw groove of the stud bolt.

  According to a second aspect of the present invention, in the reinforcing collar according to the first aspect, the locking clip protrudes at a predetermined height in a bending side direction at a distal end portion of each first locking piece. And the engaging clip is configured such that, when the stud bolt is inserted, each of the protruding parts comes into contact with the inner peripheral surface of each of the second engaging pieces. And

  In the reinforcing collar according to claim 1 having the above-described configuration, the collar body that is made of a metal and is formed into a cylindrical shape and is fitted into a mounting hole formed in a mounting portion of a synthetic resin vehicle fixing part by press-fitting or the like. A pair of step portions having an inner diameter larger than that of the cylindrical hole are formed at both end edges in the axial direction of the inner peripheral surface. The collar body is provided with a synthetic resin locking clip formed in a substantially cylindrical shape through which a stud bolt can be inserted. In addition, this locking clip is formed with a ring-shaped annular portion that is inserted into one step portion on the entrance side of the stud bolt in the collar body, and the stud bolt is inserted from the inner peripheral surface of the annular portion. When a plurality of first locking pieces that can be elastically deformed in a direction project in a predetermined length and a stud bolt is inserted, the tip of each first locking piece is inserted into the screw groove of the stud bolt. It is fitted and locked. In addition, a second locking piece that can be elastically deformed radially inward from the base end portion of each first locking piece is suspended along the inner peripheral surface of the collar body to the other stepped portion. A locking projection protrudes radially outward from the tip of the locking piece and is locked to the other stepped portion.

As a result, when mounting synthetic resin vehicle fixing parts such as wire harness protectors and unit boxes to stud bolts erected on the panel on the lower surface of the vehicle body, each stud bolt has its own reinforcing collar. And the first locking piece of the reinforcing collar is fitted and locked into the screw groove of the stud bolt, by bringing the mounting portion of the vehicle fixing part into contact with the panel or the like on the lower surface of the vehicle body. The vehicle fixing part is temporarily fixed, and both hands can be separated from the vehicle fixing part. Thereafter, the final tightening process of the nut can be directly performed on each stud bolt, and the workability in the upward work can be greatly improved.
In addition, the locking clip is configured such that each second locking piece is bent inward in the radial direction and inserted into the collar body, the annular portion is inserted into one stepped portion, and at the tip of each second locking piece. Since each of the formed locking projections is locked to the other stepped portion, the locking clip can be attached to the collar body by an extremely simple one-touch operation.
Furthermore, by mounting the locking clip in the metal collar body, it becomes possible to hold the locking clip in the axial direction with a high holding force (for example, about 100 N to 200 N). The weight of the protector, the unit box, and the like can be held via the plurality of collar bodies and the locking clips, and the vehicle fixing component can be securely fixed to the panel on the lower surface of the vehicle body.

  Further, in the reinforcing collar according to claim 2, a convex portion projecting at a predetermined height in the bending side direction is provided at the tip end portion of each first locking piece that protrudes from the inner peripheral surface of the annular portion of the locking clip. When the stud bolt is inserted and each projection is brought into contact with the inner peripheral surface of the second locking piece, the first locking piece causes the stud bolt to Positioning on the shaft center enables easy positioning when assembling synthetic resin vehicle fixing parts such as a wire harness protector and a unit box.

Hereinafter, a reinforcing collar according to the present invention will be described in detail with reference to the drawings based on an embodiment in which a wire harness protector is embodied. First, the configuration of the wire harness protector to which the reinforcing collar according to the present embodiment is attached will be described with reference to FIGS. 1 and 2.
FIG. 1 is a perspective view showing a wire harness protector to which a reinforcing collar according to the present embodiment is attached. FIG. 2 is an enlarged perspective view of a bracket for attaching the wire harness protector to the panel on the lower surface of the vehicle body.

  As shown in FIG. 1, a protector 1 for a wire harness formed of a synthetic resin is formed in a U shape in a plan view and is formed in a U shape in cross section. The protector body 4 is housed in parallel in the left-right direction, and the cover 6 opens and closes the opening between the upper ends of the left and right side walls 5 and 5 of the protector body 4.

Further, the cover 6 is formed in a U-shaped cross-section covering the outside of the left and right side walls 5 and 5 of the protector body 4, and a hook-shaped locking claw (locking portion) 8 having a hook shape is provided on both sides thereof. A single protrusion is formed for each interval. On the outside of the side walls 5 and 5 of the protector main body 4 facing each of the locking claws 8, there are engaging portions 9 in a substantially rectangular tube shape (frame shape) on which the locking claws 8 are locked and detached. Each of them is integrally formed. The engaging portion 9 and the locking claw 8 constitute a locking means for locking the closed state of the side walls 5, 5 of the protector body 4 and the cover 6.
A pair of brackets 11A, 11A, 11B, 11B and 11C, 11C for attaching to the panel on the lower surface of the vehicle body are integrally formed on the outside of the side walls 5, 5 of the protector body 4.

Moreover, as shown in FIG. 2, the groove part 12 into which the side wall of the cover 6 is inserted from the upper side is formed between the protector body 4 side upper end part of each bracket 11A to 11C and the upper end part of each side wall 5 and 5. Has been.
Each bracket 11A to 11C is provided with a through hole 15 at a central portion in plan view. Further, a stepped portion 16 having a predetermined depth (in this embodiment, about 2 mm to 3 mm) into which the flange portion 22 of the reinforcing collar 21 is fitted is concentrically formed at the upper edge of each through hole 15. Has been formed. Each reinforcing collar 21 is attached to each through-hole 15 by being press-fitted or fitted from above.
When the wire harness protector 1 is fixed to the panel 18 on the lower surface of the vehicle body, the reinforcing collars 21 provided on the brackets 11A to 11C are erected on the panel 18 on the lower surface of the vehicle body as will be described later. The bolt 19 is inserted (see FIG. 7), and a nut (not shown) is tightened. At this time, each reinforcement collar 21 prevents each bracket 11A-11C from being crushed and deformed by a predetermined tightening torque by the stud bolt 19 and the nut.

Next, the configuration of the reinforcing collar 21 will be described with reference to FIGS. 3A and 3B are views showing the reinforcing collars 21 attached to the brackets 11A to 11C. FIG. 3A is a plan view and FIG. 3B is a side view. 4 is a cross-sectional view taken along arrow X1-X1 in FIG. 5 is a cross-sectional view taken along arrow X2-X2 in FIG.
As shown in FIGS. 3 to 5, the reinforcing collar 21 includes a metal collar body 25 and a synthetic resin locking clip 26 that is fitted and locked in the collar body 25. ing.

  The metal collar body 25 is formed in a cylindrical shape having a predetermined height (in this embodiment, the height is substantially equal to the thickness dimension of each of the brackets 11A to 11C). A flange portion 22 having a predetermined thickness (about 2 mm to 3 mm in this embodiment) extending concentrically is formed. Further, on the inner peripheral surface of the collar body 25, a pair of an upper step portion 27 and a lower step portion 28 are formed on the upper and lower end edges in the axial direction and formed with an inner diameter larger than the cylindrical hole.

The synthetic resin locking clip 26 is formed in a substantially cylindrical shape through which the stud bolt 19 can be inserted. A ring-shaped annular portion 30 having a predetermined thickness is formed at the upper end portion of the locking clip 26 and is inserted into the upper step portion 27 of the collar body 25. Further, the inner diameter of the annular portion 30 is formed to be smaller than the inner diameter of the collar body 25 by a predetermined dimension.
Further, on the inner peripheral surface of the annular portion 30, a pair of first locking pieces 31 are provided so as to project a predetermined length obliquely downward toward the center of the tube hole so as to face each other. Each first locking piece 31 is formed in a substantially flat plate shape and has a substantially sector shape in plan view, and is provided so as to be elastically deformable in the insertion direction of the stud bolt 19 (downward direction in FIG. 4). Further, the distal end portion of each first locking piece 31 is formed in an arc shape along the screw groove of the stud bolt 19. Further, a rib-like convex portion 32 is provided below the tip portion of each first locking piece 31 and is erected in an arc shape along the tip portion over the entire width of the first locking piece 31. It has been. Each convex portion 32 is formed so as to abut on the inner peripheral surface of the second locking piece 33 when the stud bolt 19 is inserted as will be described later (see FIG. 7).

  Further, at the base end portion of each first locking piece 31, a bottom formed on the lower end portion of the color main body 25 along the inner peripheral surface of the collar main body 25 from the base end portion of the first locking piece 31. Each second locking piece 33 is provided so as to hang down to the stepped portion 28, and a locking protrusion 34 protruding outward in the radial direction is formed at the tip of each second locking piece 33. ing. The outer peripheral surface of each of the second locking pieces 33 is a substantially flat plate that is bent in the circumferential direction so as to be in close contact with the inner peripheral surface of the collar body 25, and is formed so as to be elastically deformable radially inward. As a result, each second locking piece 33 elastically contacts the inner peripheral surface of the collar body 25 when the locking clip 26 is inserted into the collar body 25 and assembled. 34 is locked to the lower step portion 28, and the locking clip 26 is attached to the collar body 25.

  In addition, on the lower end surface of each reinforcing collar 21, after press-fitting or fitting into each of the brackets 11 </ b> A to 11 </ b> C, outward projections 37 to prevent the collar body 25 from falling off at four positions at intervals of 90 degrees. Is formed by caulking. Thereby, the collar main body 25 of each reinforcement collar 21 is fixed to each bracket 11A-11C by the flange part 22 and each projection part 37. As shown in FIG.

Here, a method of attaching the locking clip 26 to the collar body 25 will be described with reference to FIG. FIG. 6 is an explanatory view for explaining a method of attaching the synthetic resin locking clip 26 to the metal collar body 25.
As shown in FIG. 6, first, the metal collar body 25 is inserted into the mounting hole 42 of the jig 41. The inner diameter of the mounting hole 42 is smaller than the outer diameter of the flange portion 22 of the collar body 25.
Then, the annular clip 30 is inserted into the upper step portion 27 by inserting the locking clip 26 into the collar body 25 so that the second locking pieces 33 are on the lower side. Each locking projection 34 formed at the tip of the locking piece 33 is locked to the lower step portion 28, and the locking clip 26 is attached to the collar body 25. Therefore, the locking clip 26 can be attached to the collar body 25 with a very simple one-touch operation.
The collar body 25 may be held with one hand, and the locking clip 26 may be inserted into the collar body 25 and attached with the other hand.

Next, a state in which the stud bolt 19 erected on the panel 18 on the lower surface of the vehicle body is inserted into the reinforcing collar 21 attached to each bracket 11A to 11C of the wire harness protector 1 will be described with reference to FIG. FIG. 7 is a side sectional view showing a state in which the reinforcing collar 21 attached to each bracket 11A to 11C of the wire harness protector 1 is inserted into the stud bolt 19 standing on the panel 18 on the lower surface of the vehicle body.
As shown in FIG. 7, when the stud bolts 19 erected on the panel 18 on the lower surface of the vehicle body are inserted into the reinforcing collars 21 attached to the brackets 11 </ b> A to 11 </ b> C of the wire harness protector 1, Each first locking piece 31 of the collar 21 is pushed down and bent by the stud bolt 19, and the leading end of each first locking piece 31 is fitted and locked in the screw groove of the stud bolt 19. Further, the convex portion 32 erected on the lower surface on the front end side of each first locking piece 31 is brought into contact with the inner peripheral surface of the second locking piece 33. Thereby, the stud bolt 19 is positioned substantially on the central axis of the reinforcing collar 21.

  Then, when both hands are released from the wire harness protector 1 with the brackets 11 </ b> A to 11 </ b> C in contact with the panel 18 on the lower surface of the vehicle body, the leading end of each first locking piece 31 is attached to the stud bolt 19. Since the first locking pieces 31 are deformed and bent in the panel 18 side direction because they are fitted and locked in the screw grooves, the wire harness protector 1 is held and temporarily fixed in the state shown in FIG. Further, since each locking clip 26 is elastically locked to the metal collar body 25 via the second locking pieces 33 and the locking projections 34, the collar body 25 has a high holding force ( For example, it is a holding force that can withstand a load of about 100 N to 200 N.) and does not fall off from the collar body 25 due to the weight of the wire harness protector 1 (about 2 kg to 10 kg). Then, a nut (not shown) can be directly tightened to the stud bolt 19 in the state shown in FIG.

  Therefore, as described above, the reinforcing collar 21 according to the present embodiment is elastically formed through the metal collar body 25 and the second locking pieces 33 and the locking protrusions 34 in the collar body 25. After being press-fitted or fitted into each through-hole 15 formed in each bracket 11 </ b> A to 11 </ b> C of the synthetic resin wire harness protector 1, the crimping is performed. Are mounted by forming each projection 37. Further, the locking clip 26 has a substantially cylindrical shape into which the stud bolt 19 can be inserted, and a pair of first locking pieces 31 that can be elastically deformed in the insertion direction of the stud bolt 19 has an inner peripheral surface of the annular portion 30. When the stud bolt 19 is inserted, the tip end portion of each first locking piece 31 is fitted into the screw groove of the stud bolt 19. Stopped.

  Thereby, when attaching the protector 1 for wire harnesses to the stud bolt 19 erected on the panel 18 on the lower surface of the vehicle body, the reinforcing collars 21 are inserted through the stud bolts 19 in the upward operation, and the protector for wire harnesses When the first brackets 11A to 11C are brought into contact with the panel 18 on the lower surface of the vehicle body, the first locking pieces 31 of the reinforcing collar 21 are fitted and locked in the screw grooves of the stud bolts 19 for the wire harness. The protector 1 is temporarily fixed, and both hands can be separated from the wire harness protector 1. Thereafter, the final tightening process of the nut can be directly performed on each stud bolt 19, and the workability in the upward work can be greatly improved.

  In addition, the locking clip 26 bends each second locking piece 33 radially inward and inserts it into the collar body 25 to insert the annular portion 30 into the upper stepped portion 27 and each second locking piece. Since each locking projection 34 formed on the tip end portion 33 is locked to the lower step portion 28 and can be mounted in the collar body 25, the locking clip 26 is attached to the collar body 25 by a very simple one-touch operation. It becomes possible.

  In addition, the locking clip 26 made of synthetic resin is elastically locked and attached to the metal collar body 25 via the second locking pieces 33 and the locking projections 34, thereby the locking clip 26. Can be held in the axial direction with a high holding force (for example, about 100 N to 200 N), and the weight of the wire harness protector 1 can be held via the plurality of collar bodies 25 and the locking clips 26. The wire harness protector 1 can be surely temporarily fixed to the panel 18 on the lower surface of the vehicle body.

  Furthermore, a convex portion 32 is formed at the tip end portion of each first locking piece 31 protruding from the inner peripheral surface of the annular portion 30 of the locking clip 26 and protrudes a predetermined height in the bending side direction. Is inserted, the projections 32 are brought into contact with the inner peripheral surfaces of the second locking pieces 33, so that the stud bolts 19 are connected to the cylinders of the locking clips 26 by the first locking pieces 31. It is positioned on the axial center of the hole and can be easily positioned when the wire harness protector 1 is assembled.

In addition, this invention is not limited to the said Example, Of course, various improvement and deformation | transformation are possible within the range which does not deviate from the summary of this invention. For example, the following may be used.
(A) In the above embodiment, the reinforcing collars 21 are attached to all of the pair of brackets 11A to 11C. However, after the reinforcing collars 21 are press-fitted or fitted into a plurality of brackets of the brackets 11A to 11C, The protrusions 37 may be formed and attached by caulking, and only the metal collar body 25 may be press-fitted or fitted to other brackets, and then the protrusions 37 may be formed and attached by caulking. For example, after press-fitting or fitting the reinforcing collar 21 into the bracket 11A on the left side wall 5 (the back side wall 5 in FIG. 1) and the bracket 11B on the right side wall 5 (the front side wall 5 in FIG. 1) of the protector body 4, Each protrusion 37 is formed and attached by caulking, and only the metal collar body 25 is press-fitted or fitted into each of the other brackets 11A, 11B, 11C, and 11C, and then each protrusion 37 is formed by caulking. You may make it wear. As a result, positioning at the time of assembling the wire harness protector 1 can be performed more easily, and the number of reinforcing collars 21 used can be reduced.

  (B) In the above embodiment, the pair of first locking pieces 31 are provided on the inner peripheral surface of the locking clip 26 so as to oppose each other. However, the first locking pieces 31 are spaced apart by a central angle of 120 degrees in the circumferential direction. Alternatively, three may be provided, or four may be provided at intervals of 90 degrees in the circumferential direction in the circumferential direction. Thereby, fitting locking of the front-end | tip part of each 1st locking piece 31 and the stud bolt 19 can be performed still more reliably. A base end portion of each first locking piece 31 is formed at the lower end portion of the collar body 25 along the inner peripheral surface of the collar body 25 from the base end portion of the first locking piece 31. Each second locking piece 33 is provided so as to hang down to the stepped portion 28, and a locking protrusion 34 protruding outward in the radial direction is formed at the tip of each second locking piece 33. ing.

  (C) In the above-described embodiment, a rib shape is provided below the distal end portion of each first locking piece 31 so as to stand in an arc shape along the distal end portion over the entire width of the first locking piece 31. However, if it is not necessary to position the stud bolt 19 on the axial center of the locking clip 26, the convex portion 32 may be omitted. Thereby, the latching clip 26 made of synthetic resin can be further simplified.

It is a perspective view which shows the protector for wire harnesses which the collar for reinforcement concerning a present Example was attached. It is an expansion perspective view of the bracket for attaching the protector for wire harnesses to the panel of a vehicle body lower surface. FIG. 4A is a plan view and FIG. 5B is a side view showing a reinforcing collar according to the present embodiment. It is X1-X1 arrow sectional drawing of FIG. It is X2-X2 arrow sectional drawing of FIG. It is explanatory drawing explaining the method to attach a latching clip to a metal collar main body. It is a sectional side view which shows the state which penetrated the collar for reinforcement attached to each bracket of the protector for wire harnesses to the stud bolt erected in the panel of the vehicle body lower surface.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wire harness protector 11A-11C Bracket 18 Panel 19 Stud bolt 21 Reinforcement collar 22 Flange part 25 Collar body 26 Locking clip 27 Upper step part 28 Lower step part 30 Ring part 31 First locking piece 32 Convex part 33 Second locking piece 34 Locking projection 33 Projection

Claims (2)

In the reinforcing collar that is attached to the inner peripheral surface of the mounting hole formed in the mounting portion of the synthetic resin vehicle fixing part and is inserted into the stud bolt,
A collar main body formed in a substantially cylindrical shape with a pair of stepped portions having an inner diameter larger than the cylindrical hole at both end edges in the axial direction of the inner peripheral surface;
A locking clip that is formed in a substantially cylindrical shape through which the stud bolt can be inserted by a synthetic resin and is mounted in the collar body,
With
The locking clip is a ring-shaped annular portion inserted into one of the step portions formed on the side of the collar body stud bolt in the insertion direction;
A plurality of first locking pieces projecting a predetermined length from the inner surface of the annular portion toward the center of the cylindrical hole and elastically deformable in the insertion direction of the stud bolt;
A plurality of second locking pieces that are suspended from the base end portion of each first locking piece along the inner peripheral surface of the collar body to the other stepped portion and elastically deformed radially inward;
A locking projection formed to protrude radially outward from the tip of each second locking piece and locked to the other stepped portion;
Have
When the stud bolt is inserted, the locking clip has a front end portion of each first locking piece fitted and locked into a screw groove of the stud bolt. The locking clip has a convex portion formed so as to protrude a predetermined height in the bending side direction at the tip end portion of each first locking piece,
2. The reinforcing clip according to claim 1, wherein when the stud bolt is inserted, each of the protrusions comes into contact with an inner peripheral surface of each of the second locking pieces. Color.

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