JP5422423B2 - Resin part having clip nut mounting portion and manufacturing method thereof - Google Patents

Description

  The present invention relates to a resin component having a clip nut mounting portion and a manufacturing method thereof.

  Conventionally, many long resin molded products have been extrusion-molded for reasons such as ease of molding and reduction in molding cost. As shown in FIGS. 7 and 8, the extruded resin component 70 includes a plate-like portion 72 of the resin component 70 including a clip nut 80 and a bolt (screw) when assembled to other components. ) 87 (shown in FIG. 8) is fixed to the other component 90.

  The clip nut 80 has two substantially rectangular sandwiching pieces 82 and 84, and has a substantially U-shaped side surface. A bolt (including a screw) can be inserted into one sandwiching piece 82. Bolt holes (also referred to as screw holes) 83 are formed, and the other clamping piece 84 is provided with a nut portion 85. The nut portion 85 includes a member (not shown) in which a nut is fixed by welding or the like, in addition to a member in which a screw hole is formed in the sandwiching piece 84 as illustrated.

  In the plate-like portion 72 of the resin component 70, a bolt insertion hole 74 is formed in advance in the clip nut attachment portion 73, and a clip nut 80 is attached to the clip nut attachment portion 73, and then formed in the other component 90. The position of the bolt hole 83 of the clip nut 80 is aligned with the bolt insertion hole 94, and the plate-like portion 72 of the resin component 70 is overlaid on the other component 90. In this state, the bolt insertion hole 74 of the other component 90 is placed. Then, the resin part 70 is fixed to the other part 90 by inserting the bolt 87 and screwing it with the nut portion 85 of the clip nut 80 attached to the resin part 70.

  The resin nut 70 fixed to the other component 90 with the clip nut 80 and the bolt 87 is attached in advance to the clip nut mounting portion 73 in order to speed up the fixing work, and in that state, the resin component 70 is transferred to the other component. The position of the clip nut 80 is shifted during transportation, and the clip nut 80 may have to be re-arranged during the subsequent fixing work, resulting in a problem that the efficiency of the fixing work is lowered. is there. Further, when the bolt 87 is tightened in the fixing operation, the clip nut 80 rotates at the plate-like portion 72, and this may cause the resin component 70 after being fixed to the other component 90 to be undulated. An example of the extruded resin part 70 is a front spoiler (resin part) that is attached to a lower part of a front bumper (other parts) of an automobile with a clip nut and a bolt.

  In order to prevent displacement of the clip nut during conveyance of the resin part and rotation of the clip nut when tightening the bolt, both sides of the clip nut 80 are provided on both sides of the clip nut mounting portion of the resin part 70 as shown in FIG. It is conceivable to form the positioning protrusions 105 and 105 so as to be sandwiched. However, the extrusion molding used for molding the resin component 70 is a molding method in which a long product having a predetermined shape is continuously extruded from the die of the extrusion molding apparatus, and a protrusion is provided in a direction intersecting the extrusion direction L. Could not be formed. For this reason, it has been difficult to form positioning protrusions 105 and 105 for preventing the positional displacement of the clip nut during conveyance and the rotation of the clip nut during bolt tightening on the conventional extruded resin parts. . Further, in order to mold a long resin part by injection molding, an expensive metal mold is required and the molding apparatus becomes large, so that the cost is increased and the manufacturing becomes troublesome as compared with extrusion molding.

Japanese Utility Model Publication No. 6-63482 Japanese Utility Model Publication No. 63-161088

  The present invention has been made in view of the above points, and includes a clip nut mounting portion that can prevent the clip nut from being displaced during the transportation of the extruded resin part and the clip nut to be rotated during the bolt tightening. An object of the present invention is to provide a resin component having the same and a method for producing the same.

  The invention according to claim 1 is a resin part having a clip nut mounting part in a plate-like part, wherein the resin part is formed by extrusion molding, and the extrusion molding is provided on one side or both sides of the plate-like part of the resin part. A rib formed along the direction of extrusion at the time is provided so as to intersect with the clip nut attachment portion, and the rib is cut and removed at the clip nut attachment portion, and the plate-like portion between the opposing cut surfaces of the rib The present invention relates to a resin component having a clip nut attachment portion, wherein a bolt insertion hole is formed in the clip nut attachment portion and the clip nut attached to the clip nut attachment portion is sandwiched between the opposing cut surfaces of the rib.

  According to a second aspect of the present invention, there is provided a method of manufacturing a resin component having a clip nut mounting portion on a plate-like portion of the resin component, and extruding the resin component having the plate-like portion and having ribs on both sides or one side of the plate-like portion. A bolt made of the through hole is formed by forming a through hole in the plate-like portion and cutting and removing the rib at the position of the rib in the portion of the plate-like portion that is to be the clip nut mounting portion. The present invention relates to a method for producing a resin component having a clip nut attachment portion, characterized in that a clip nut attachment portion having an insertion hole and sandwiching the clip nut between the opposing cut surfaces of the rib is formed.

  According to the first aspect of the present invention, since the clip nut mounted on the clip nut mounting portion of the plate-shaped portion of the resin component is sandwiched between the opposed cutting surfaces of the ribs and held by the clip nut mounting portion, the resin component It is possible to prevent the clip nut from shifting during the conveyance of the resin, and it is possible to prevent the clip nut from rotating during bolt tightening when fixing the resin part to another part.

  According to the invention of claim 2, the resin part capable of preventing the clip nut from being displaced during the transportation of the resin part and the rotation of the clip nut at the time of tightening the bolt is formed by extrusion molding that does not require an expensive mold such as injection molding. It can be manufactured inexpensively and easily.

It is a perspective view of a resin part which has a clip nut attaching part concerning one embodiment of the present invention, and a clip nut with which the resin part is equipped. It is a top view of the clip nut attaching part and clip nut of FIG. It is a one part perspective view of the resin component before clip nut attachment part formation. It is a perspective view at the time of fixing the resin component of one Embodiment of this invention to another component. It is sectional drawing which cut | disconnected the state which fixed the resin component of one Embodiment of this invention to the other components by the cross section orthogonal to the length direction (extrusion direction) of a resin component. It is sectional drawing which cut | disconnected the state which fixed the resin component of one Embodiment of this invention to the other components in parallel with the length direction (extrusion direction) of the resin component. It is a perspective view of the resin component which has the conventional clip nut attaching part, and the clip with which this resin component is mounted | worn. It is a perspective view at the time of fixing the conventional resin component to other components. It is a perspective view explaining the problem when providing the protrusion for positioning on both sides of a clip nut attaching part.

  Below, the resin component which has the clip nut attachment part of one Embodiment of this invention is demonstrated. A resin part 10 having a clip nut attachment portion shown in FIG. 1 is attached to a lower part of a front bumper of an automobile as a front spoiler of the automobile.

  The resin part 10 having the clip nut mounting portion is formed by extrusion molding, and includes a front surface portion 11 that is curved in the vertical direction, and a plate-like portion 21 that is formed in a substantially horizontal direction on the back surface side upper portion of the front surface portion 11. It becomes more. The upper end of the front surface portion 11 is an upper protrusion 13 protruding upward from the plate-like portion 21. The height of the upper protrusion 13 is larger than the thickness of the upper clamping piece 63 of the clip nut 61 attached to the clip nut attachment portion 31 of the plate-like portion 21. The upper protrusion 13 is formed at a lower portion of the front bumper 50 when the resin component 10 is fixed to a fixing plate-like portion (fixing flange) 52 below the front bumper 50 of the automobile shown in FIGS. And the resin part 10 having the clip nut mounting portion are hidden so that the upper clamping piece 63 of the clip nut 61 is not visually recognized from the front of the front bumper 50.

  The plate-like portion 21 is a portion that is a fixing surface to another component, that is, a fixing surface to the front bumper 50 in the illustrated example, and is configured by a flange having a predetermined width (depth). Ribs 25 are formed on the upper surface 22 of the plate-like portion 21 along the extrusion direction L when the resin component 10 is extruded. The rib 25 is preferably made equal to or higher than the thickness of the upper clamping piece 63 of the clip nut 61, and is preferably made lower than the height of the upper protrusion 13 of the front surface portion 11. The width of the rib 25 (d shown in FIG. 2) is determined as appropriate, and examples include 2 to 10 mm. The rib 25 is formed only on the upper surface 22 of the plate-like portion 21 in the illustrated example, but may be formed on the lower surface 23 of the plate-like portion 21, and further, You may form in not only one side but both surfaces (upper surface 22 and lower surface 23). Further, the rib 25 is formed so as to intersect with the clip nut attaching portion 31, that is, to intersect with a portion (clip nut attaching portion planned portion) which becomes the clip nut attaching portion 31 at the time of extrusion molding.

  The clip nut attachment portion 31 is a portion to which the clip nut 61 is attached, and a plurality of the clip nut attachment portions 31 are provided at predetermined intervals in the length direction of the plate-like portion 21 (the same direction as the extrusion direction L). The interval between the clip nut attachment portions 31 is set according to the length of the resin component 10 or the like. In the clip nut attachment portion 31, the rib 25 is cut and removed, and a bolt insertion hole 35 is formed as a through hole in the plate-like portion 21 between the cut surfaces 25a, 25a facing the rib 25. As shown in FIG. 2, the length e by which the rib 25 is cut and removed is made equal to the width w of the clip nut 61. It should be noted that the phrase “equal to the width w of the clip nut 61” does not mean only the same one as the width w of the clip nut 61, but a predetermined amount larger than the same one, for example 0.5 to It includes up to about 2 mm. The bolt insertion hole 35 is a long hole whose length e is the length e of the cut and removed portion of the rib 25, and the long diameter a is the same as the length direction of the plate-like portion 21 (the same as the extrusion direction L). The minor axis b is formed as the depth direction (direction perpendicular to the length direction) M of the plate-like portion 21. The short diameter b is smaller than the length k of the clip nut and is not less than the diameter of the bolt to be used.

  The manufacturing method of the resin component 10 which has the said clip nut attachment part is demonstrated. First, as shown in FIG. 3, a long product having the plate-like part 21 on the back side of the curved front part 11 and a rib 25 on the upper surface 22 of the plate-like part 21 is formed by known extrusion molding. Extrusion molding is performed using an apparatus, and the long product thus extruded is cut to a predetermined length to obtain a resin component 10A having ribs 25 on the plate-like portion 21. The upper end of the front surface portion 11 is an upper protrusion 13 protruding upward from the plate-like portion 21. The rib 25 is formed on the upper surface 22 of the plate-like portion 21 in the illustrated example, but may be the lower surface 23 of the plate-like portion 21, and further on one side of the plate-like portion 21. It is not limited, and it may be formed on both surfaces (upper surface 22 and lower surface 23 in the illustrated example).

  Next, a through hole is formed in the plate-like portion 21 at a position 35A of the rib 25 in a portion (that is, a clip nut attaching portion planned portion) 31A to be the clip nut attaching portion 31, and the rib 25 is cut and removed. As shown in FIGS. 1 and 2, the clip has the bolt insertion hole 35 formed of the through hole and sandwiches the clip nut 61 between the cut surfaces 25a and 25a facing the rib 25. The nut mounting part 31 is formed, and the resin component 10 (shown in FIG. 1) having the clip nut mounting part is obtained. Note that the range of the portion 31 </ b> A that becomes the clip nut mounting portion coincides with the range of the clip nut mounting portion 31. Further, the portion indicated by the chain line 35 </ b> A in FIG. 3 becomes the bolt insertion hole 35. Formation of the through hole to be the bolt insertion hole 35 can be performed by punching such as a press. The size and shape of the through hole are the same as those of the clip nut insertion hole 35. That is, the through hole is formed of a long hole whose major axis is equal to the width w of the clip nut 61 and whose minor axis is smaller than the length k of the clip nut and is equal to or larger than the diameter of the bolt to be used, and The long diameter of the through hole is formed as the length direction of the resin component 10A (the extrusion direction L).

A case where the resin component 10 having the clip nut mounting portion is assembled to a front bumper of an automobile will be described.
First, the clip nut 61 is mounted on the clip nut mounting portion 31 of the resin component 10 having the clip nut mounting portion. At that time, the clip nut 61 is disposed so that the end 32 of the clip nut mounting portion 31 is located between the tip 64 of the upper clamping piece 63 and the tip 66 of the lower clamping piece 65 of the clip nut 61. The clip nut 61 is pushed into the clip nut mounting portion 31 and is fitted between the opposing cut surfaces 25a and 25a of the rib 25. FIG. 4 shows a state in which the clip nut 61 is attached to the resin component 10 having the clip nut mounting portion. The clip nut 61 attached to the clip nut mounting portion 31 has a bolt insertion hole 67 formed in the upper clamping piece 63 and a hole position of a nut portion 68 formed in the lower clamping piece 65. The clip nut mounting portion 31 is in a state that matches the bolt insertion hole 35. Thereafter, the resin component 10 having the clip nut attachment portion is conveyed to a work site (assembly work site) for fixing to the front bumper. Since the clip nut 61 mounted on the clip nut mounting portion 31 is sandwiched and held by the cut surfaces 25a and 25a of the rib 25 facing on both sides of the clip nut mounting portion 31 during the transportation, Misalignment is prevented.

  The clip nut 61 mounted on the clip nut mounting portion 31 is brought into contact with the upper protrusion 13 of the front surface portion 11 at the tip 64 of the upper clamping piece 63, while the clip 69 is fixed at the base 69 of the clip nut 61. By making contact with the end portion 32 of the nut mounting portion 31, it is possible to more reliably prevent the clip nut 61 from shifting and the rotation of the clip nut 61 during bolt tightening described later.

  As shown in FIG. 4, the front bumper 50 to which the resin component 10 having the clip nut mounting portion is fixed is a fixing plate-like portion (fixing flange) protruding substantially horizontally from the lower portion of the front portion 51 toward the rear. 52 is formed. The fixing plate-like portion 52 is formed with a plurality of bolt insertion holes 55 corresponding to the bolt insertion holes 35 in the resin component 10 having the clip nut attachment portion.

  The resin part 10 to which the clip nut 61 is attached is arranged below the fixing plate-like portion 52 of the front bumper 50, and the bolt hole 67 formed in the upper clamping piece 63 of the clip nut 61 is It is made to correspond to the position of the bolt insertion hole 55 formed in the fixing plate-like portion 52 of the front bumper 50. In this state, the bolt B is inserted from the bolt insertion hole 55 of the fixing plate-like portion 52 of the front bumper 50 and is passed through the bolt hole 67 formed in the upper clamping piece 63 of the clip nut 61. 6, the bolt B is screwed into a nut portion 68 formed on the lower holding piece 65 of the clip nut 61 and tightened to tighten the resin component 10 having the clip nut mounting portion on the front bumper. Fix to the bottom of 50.

  When the bolt B is tightened, the clip nut 61 is sandwiched between the cut surfaces 25a and 25a of the rib 25 facing each other on both sides of the clip nut mounting portion 31 and is prevented from rotating. Work can be performed efficiently and reliably. Further, as described above, the clip nut 61 is brought into contact with the upper protrusion 13 of the front surface portion 11 at the tip 64 of the upper clamping piece 63, while the end of the clip nut mounting portion 31 is supported at the base 69 of the clip nut 61. By making contact with the portion 32, it is possible to more reliably prevent the clip nut 61 from rotating when the bolt is tightened. FIG. 5 shows a state in which the resin part 10 is fixed to the lower part of the front bumper 50 by tightening the bolt B in a cross section orthogonal to the length direction of the resin part 10 (the same direction as the extrusion direction L). On the other hand, FIG. 6 is a cross-sectional view cut in parallel with the length direction of the resin component 10 (the same direction as the extrusion direction L).

  In addition, another rib is formed in the resin part along the extrusion direction L so as to abut against the clip piece tip 64 of the clip nut 61, thereby further preventing the clip nut 61 from being displaced and preventing rotation. May be raised. Further, the rib 25 may be provided on the lower surface 23 of the plate-like portion 21, and the plate-like portion 52 for fixing the front bumper and the plate-like portion 21 of the resin component 10 may be sandwiched between the clip nuts 61. In this case, the bolt and the nut portion 68 of the clip nut 61 may be tightened by providing the nut portion 68 on the contrary and inserting the bolt upward from below the clip nut.

  In the above embodiment, the resin component having the clip nut mounting portion is shown as a vehicle front spoiler attached to the front bumper of the vehicle. However, the resin component having the clip nut mounting portion of the present invention is not limited to the front spoiler of the vehicle. However, other automobile parts may be used.

DESCRIPTION OF SYMBOLS 10 Resin part which has clip nut attachment part 10A Resin part which has rib 21 Plate part 25 Rib 25a Rib cutting surface 31 Clip nut attachment part 35 Bolt insertion hole of resin part 61 Clip nut

Claims (2)

In resin parts having a clip nut mounting part on the plate-like part,
The resin part is made by extrusion molding,
On one side or both sides of the plate-like part of the resin part, ribs formed along the extrusion direction at the time of the extrusion are provided so as to intersect the clip nut attachment part,
In the clip nut mounting portion, the rib is cut and removed, and a bolt insertion hole is formed in a plate-like portion between opposed cutting surfaces of the rib,
A resin part having a clip nut attachment portion, wherein the clip nut attached to the clip nut attachment portion is sandwiched between the opposing cut surfaces of the rib. In the method of manufacturing a resin part having a clip nut mounting part on the plate-like part of the resin part,
Extruding a resin part having the plate-like part and having ribs on both sides or one side of the plate-like part,
By forming a through hole with the width of the clip nut in the plate-like portion at the position of the rib in the portion to be the clip nut mounting portion in the plate-like portion, by cutting and removing the rib,
A method for producing a resin component having a clip nut mounting portion, comprising: a clip nut mounting portion having a bolt insertion hole formed of the through hole and sandwiching the clip nut at a cutting surface facing the rib. .

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