JP2016035306A - clip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve insertion performance by manual work when inserting a pin into an insertion hole of a grommet, and to improve temporary assembling work efficiency by eliminating a risk of a damage even if positioning at insertion by an automobile assembling machine is failed, and surely correcting the positioning to a regulate position accompanied by the movement of the pin or the grommet.SOLUTION: In a clip in which a grommet can hold a pin in a retention state accompanied by the intrusion of a rib into a slit when the pin is inserted into an insertion hole, and the pin can be curved and deformed toward a flange part at a leg part accompanied by the expansion of the slit when the pin is further pressure-inserted into a tip-narrowed portion of the insertion hole, a guide inclined face for guiding the rib to the slit is formed at an internal peripheral face of the leg part while continuing to both sides of the slit in a circumferential direction.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a clip composed of a grommet and a pin, and more particularly to a type in which the insertion position of the pin into the grommet side insertion hole is regulated in relation to the temporary assembly of the pin to the grommet or the main fastening structure.

  As disclosed in Patent Document 1, the target clip includes a pin having a non-circular cross section at least partially and a grommet having an insertion hole into which the pin can be inserted. When the grommet is expanded by inserting the pin into the insertion hole, the locked state is achieved.

  More specifically, the pin includes a head, a shaft portion provided on the head portion, and a rib projecting from a part of the shaft portion. A substantially cylindrical leg part that forms a tapered insertion hole toward the lower side to be inserted, a flange part protruding from the upper outer periphery of the leg part, and a leg part provided on the leg part. A plurality of slits extending from the lower end to the vicinity of the lower surface of the flange.

  Then, as the rib enters the slit when the pin is inserted into the insertion hole, the grommet can hold the pin in a retaining state (temporary assembly). Further, when the pin is further press-fitted into the tapered portion of the insertion hole, the leg portion can be bent and deformed toward the flange portion as the slit is expanded.

  For example, when the plate members are joined together, the above clips are inserted into the mounting holes of the plate members in a temporarily assembled state. Then, as the slit is expanded by the pressing operation (press-fitting) of the pin, the leg portion is curved and deformed toward the buttocks. Thereby, plate members are fastened thru | or clamped between the deformation | transformation part of a collar part and a leg part.

  The above clips are troublesome to handle if the pins and grommets remain separate, so the pins are temporarily assembled to the grommets after manufacturing (after molding), and are transported and managed in the temporarily assembled state. It is preferable that the clip is used in various assembly lines.

  The temporary assembly work is often performed by an automatic assembly machine. In the automatic assembly machine, for example, after the grommet is held by the gripping means of the automatic assembly machine, the pin is moved with alignment with the insertion hole of the grommet via the robot hand, and the rib of the pin becomes a slit. Get in.

  Here, although the temporary assembly work by the automatic assembly machine is efficient, if the pin and the grommet are aligned, that is, if the grommet slit and the rib of the pin are misaligned, the pin is not temporarily assembled. In addition, the ribs may be damaged, and the automatic assembly machine may stop and deteriorate the work efficiency.

  In order to solve such a problem, in the clip disclosed in Patent Document 2 by the applicant of the present application, a slope (rib guide surface) is provided at the inlet side hole edge of the insertion hole of the grommet, and the rib of the pin is regular. The rib of the pin is guided to the normal position by the inclined surface when it is displaced from the position and comes into contact with the inlet side edge of the insertion hole. That is, according to the clip disclosed in Patent Document 2, even if the insertion position of the rib of the pin is slightly shifted, the rib of the pin can be guided to the normal position by the guiding action of the inclined surface. For this reason, the positioning of the ribs of the pin can be omitted or relaxed, thereby improving the workability of the temporary assembly.

Japanese Patent No. 40673341 JP 2010-7687 A

  However, in the clip disclosed in Patent Document 2, the lower end of the slope provided at the inlet side hole edge of the insertion hole of the grommet is not continuously formed up to the slit of the grommet. For this reason, it cannot be completely guided until the rib of the pin is fitted into the slit. For example, the pin rotates around its axis while the rib moves from the lower end of the slope to the slit by pressing the pin (press fitting). May end up. In this case, the rib is not properly fitted into the slit. For this reason, the ribs are still damaged, or the automatic assembly machine stops and the work efficiency deteriorates.

  The object of the present invention is to solve the above-mentioned problems, and when inserting the pin into the insertion hole of the grommet, the insertion performance by manual operation is improved, or the alignment at the time of insertion by the automatic assembly machine described above fails. In such a case, there is no risk of damage, and it is intended to improve the temporary assembling work efficiency by reliably correcting the pin or grommet to the normal position with the movement of the pin or grommet.

  The present invention relates to a pin having a head, a shaft portion provided below the head portion, and a rib projecting from a part of the shaft portion, and tapered toward a lower side where the pin is inserted. A substantially cylindrical leg that forms a cylindrical insertion hole, a collar projecting from the upper outer periphery of the leg, and a lower surface of the collar from the lower end of the leg provided on the leg A grommet having a plurality of slits extending to the vicinity, and the grommet prevents the pin from coming off as the rib enters the slit when the pin is inserted into the insertion hole. The leg portion can be curved and deformed toward the heel portion as the slit expands when the pin is further press-fitted into the tapered portion of the insertion hole. In the clip, there is a slit on the inner peripheral surface of the leg. Continuously in the opposite sides, the rib is a clip, characterized in that the guide slope for guiding to the slit is formed.

  According to the present invention, on the inner peripheral surface of the leg portion, the guide slopes for guiding the rib to the slit are formed continuously on both sides in the circumferential direction of the slit, so that the rib is displaced from the slit. Even if it is inserted, the rib can be reliably guided to the slit (regular position) by the guide slope.

  Preferably, the grommet has an introduction-side inclined surface that is inclined toward the slit in a region between the slits adjacent to each other in the circumferential direction on the inlet-side hole edge of the insertion hole. In this case, even when the rib is displaced with respect to the slit when the pin is inserted, the rib can be surely and smoothly guided to the slit (regular position) over a wide range by the guiding action of the introduction side slope. it can.

  Preferably, adjacent guide slopes form protrusions. In this case, even if the rib is inserted with a deviation from the slit, the rib is always guided by one of the adjacent guide slopes forming the protrusion, so the rib is slit (regular position). Can be surely guided.

  In this case, more preferably, the tip of the protrusion is formed in an arc shape. In this case, the rib can be guided to the guide slope more smoothly, and the guide performance for the rib can be improved.

  Preferably, the lower end of the guide slope is positioned below the upper end of the slit. In this case, even when the rib does not fit into the upper end of the slit, the rib can be reliably guided to the slit (normal position).

  According to the present invention, on the inner peripheral surface of the leg portion, the guide slopes for guiding the rib to the slit are formed continuously on both sides in the circumferential direction of the slit, so that the rib is displaced from the slit. Even if it is inserted, the rib can be reliably guided to the slit (regular position) by the guide slope.

It is a schematic perspective view after temporary attachment of the clip of one embodiment of the present invention. It is a schematic perspective view before temporary assembly of the clip of one embodiment of the present invention. It is a schematic perspective view which shows the pin of the clip of FIG.1 and FIG.2. It is a schematic front view of the pin of FIG. FIG. 4 is a schematic side view of the pin of FIG. 3. FIG. 6 is a schematic plan view of the pin of FIGS. 1 to 5. It is CC sectional view taken on the line of FIG. It is a schematic bottom view which shows the grommet of the clip of FIG.1 and FIG.2. It is the sectional view on the AA line of FIG.

  Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

  FIG. 1 is a schematic perspective view after provisional assembly of a clip 100 according to an embodiment of the present invention, and FIG. 2 is a schematic perspective view before provisional assembly of the clip. As shown in FIGS. 1 and 2, the clip 100 includes a pin 10 having a non-circular cross section at least in part and a grommet 20 having an insertion hole 21 into which the pin 10 can be inserted.

  FIG. 3 is a schematic perspective view showing the pin 10 of the clip 100 of FIGS. 1 and 2. 4 is a schematic front view of the pin 10 of FIG. 3, and FIG. 5 is a schematic side view of the pin 10 of FIG. As shown in FIGS. 3 to 5, the pin 10 includes a head portion 11, a shaft portion 12 provided below the head portion 11, and a rib 13 projecting from a part of the shaft portion 12. Have.

  The head 11 has a substantially circular upper surface. The shaft portion 12 is provided below the lower surface of the head portion 11, and a rib 13 protrudes around the vicinity of the lower end of the shaft portion 12. Around the shaft portion 12 slightly above the rib 13, a groove portion 14 for regular fastening is provided. The lower end side of the shaft portion 12 is slightly tapered.

  As shown in FIG. 4, the ribs 13 are provided at locations where the periphery of the shaft portion 12 is equally divided, that is, at two locations displaced by 180 ° in this example. The rib 13 has a shape in which the protruding amount is gradually increased from the lower side to the upper side, and is a place where the pin 10 can be temporarily assembled to the grommet 20 as described later. The groove portion 14 has a shape in which at least a part of the periphery of the shaft portion 12 is depressed so as to have a step along the axial direction of the pin 10, and is a place where the pin 10 can be permanently fixed to the grommet 20. The pin 10 is manufactured by, for example, an injection molding method using a synthetic resin. FIG. 6 is a schematic plan view of the pin 10 of FIGS. 1 to 5, and FIG. 7 is a cross-sectional view taken along the line CC of FIG.

  The grommet 20 includes a substantially cylindrical leg portion 22 that forms a tapered insertion hole 21 toward the lower side where the pin 10 is inserted, and a flange portion 23 that projects from the upper outer periphery of the leg portion 22. And a plurality of slits 24 provided on the leg portion 22 and extending from the lower side end of the leg portion 22 to the vicinity of the lower surface of the flange portion 23.

  In the present embodiment, the leg portion 22 has four leg pieces that are provided at equal intervals (equally) via the four slits 24 and extend in the axial direction. The leg portion 22 has a tapered region toward the lower side, which is the direction in which the pin 10 is inserted, and is further provided in the insertion hole 21 at a position where the diameter of the insertion hole 21 is minimum. It has the nail | claw part 25 which protrudes in the side.

  FIG. 8 is a schematic bottom view of the grommet 20 of the clip 100 of FIGS. 1 and 2, and FIG. 9 is a cross-sectional view taken along line AA of FIG.

  In the present embodiment, as shown in FIG. 9, a guide slope 26 for guiding the rib 13 to the slit 24 is formed on the inner circumferential surface of the leg portion 22 continuously on both sides in the circumferential direction of the slit 24. Has been.

  In the present embodiment, a substantially triangular protrusion 27 is formed at a location where the adjacent guide slopes 26 meet each other, and as a result, the two guide slopes 26 are continuous over the entire area between the adjacent slits 24. It extends to. The tip (upper end) 27a of the protrusion 27 is formed in an arc shape.

  The lower end of the guide slope 26 is located below the upper end 24 a of the slit 24. The grommet 20 also corrects the rib 13 to the normal position when the rib 13 of the pin 10 is displaced from the slit 24 (normal position) and contacts the inlet-side hole edge 21 a of the insertion hole 21. It has an introduction side inclined surface 28 for guiding it into the hole. The introduction-side inclined surface 28 is provided on the inlet-side hole edge 21a on the upper inner surface of each leg piece of the leg portion 22 defined between the slits 24, and the slits 24 on both sides of the leg piece are arranged. It is the shape which inclined low toward the slit 24 of both sides from the location corresponding to the substantially middle position. That is, the introduction-side inclined surface 28 of the present embodiment is similar to the guide inclined surface 26 on the upper inner surface of each leg piece defined between the slits 24 at the entrance-side hole edge portion 21 a of the insertion hole 21. Each is provided, a total of eight. The grommet 20 is also manufactured by, for example, an injection molding method using a synthetic resin.

  Next, the operation of the present embodiment as described above will be described.

  As described above, the pin 10 and the grommet 20 manufactured separately are temporarily assembled using, for example, an automatic assembly machine. At this time, the grommet 20 is rotatably held by the body side gripping means of the automatic assembly machine, while the head 11 of the pin 10 is held by the robot hand of the automatic assembly machine. Thereafter, the pin 10 is moved with respect to the insertion hole 21 of the grommet 20 through the robot hand. As a result, each rib 13 enters the corresponding slit 24.

  Here, when the pin 10 is moved with the alignment through the robot hand, the holding angle and holding position of the pin 10 may be displaced from the slit 24 (normal position) for some reason.

  In this way, when the pin 10 is inserted into the insertion hole 21 of the grommet 20 with a deviation from the slit 24 (regular position), the rib 13 of the pin 10 has the inlet side hole edge 21 a of the insertion hole 21 of the grommet 20. It abuts on the introduction side inclined surface 28 formed on the surface. The rib 13 moves from the high side of the introduction-side inclined surface 28 toward the low side due to the force for inserting the pin 10 (the pin 10 is moved relative to the grommet 20 around its axis). It is guided to the slit 24 (regular position) in response to the guiding action of the introduction side inclined surface 28 to be rotated.

  However, while the rib 13 moves from the lower end of the introduction-side inclined surface 28 to the slit 24 with further insertion of the pin 10, for example, the pin 10 rotates around its axis for some reason, and the rib 13 is slit 24. It may deviate from (regular position) again.

  In such a case, the rib 13 comes into contact with one of the two guide slopes 26 extending continuously over the entire region between the adjacent slits 24 as the pin 10 is inserted. The lower ends of these guide slopes 26 are all located below the upper end 24 a of the slit 24. For this reason, the rib 13 in contact with the guide slope 26 is guided to the slit 24 as the pin 10 is further inserted by receiving the guide slope 26.

  Even if the rib 13 comes into contact with a place where two adjacent guide slopes 26 meet each other, the tip 13a formed at the place is caused by the arc-shaped protrusion 27, and the rib 13 is one of the guide slopes. 26 is always guided.

  For example, when the plate members are joined together, the clip 100 temporarily assembled is inserted into the mounting holes of the plate members in a temporarily assembled state. Then, as the slit 24 is expanded by the pressing operation (press-fitting) of the pin 10, the leg portion 22 is bent and deformed toward the flange portion 23. At this time, the claw portion 25 of the leg portion 22 and the groove portion 14 of the pin 10 are engaged, and the pin 10 is fixed (finally fixed) to the grommet 20. Thereby, the clip 100 fastens or clamps the plate members between the flange portion 23 and the deformed portion of the leg portion 22.

  Thereafter, in order to release the fastening or pinching of such plate members, the pin 10 is further pushed (press-fitted) into the grommet 20. As a result, the claw portion 25 of the leg portion 22 moves out of the groove portion 14 of the pin 10 and moves into the recess portion 15 of the pin 10, and accordingly, the slit 24 returns from the expanded state to the original state, that is, The deformation of the leg 22 is restored. At this time, the tip 27a of the protrusion 27 abuts on the flange 11f of the head 11 of the pin 10 and functions as a stopper against excessive pressing (press-fitting) of the pin 10.

  As described above, according to the present embodiment, the guide slope 26 for guiding the rib 13 to the slit 24 is formed on the inner peripheral surface of the leg portion 22 continuously on both sides in the circumferential direction of the slit 24. Therefore, even when the rib 13 is inserted with a gap with respect to the slit 24 when the pin 10 and the grommet 20 manufactured separately are inserted, the rib 13 is slit by the guide slope 26. It is possible to reliably guide up to 24 (regular position).

  In addition, according to the present embodiment, the grommet 20 is inclined to the slit 24 in the region between the slits 24 adjacent to each other in the circumferential direction in the inlet-side hole edge 21a of the insertion hole 21. Since the side slope 28 is provided, even when the rib 13 is displaced with respect to the slit 24 when the pin 10 is inserted, the rib 13 can be inserted into the slit 24 (regular position) over a wide range by the guiding action of the introduction side slope 28. ) Can be guided reliably and smoothly.

  Furthermore, according to the present embodiment, when the adjacent guide slopes 26 form the protrusions 27 whose tip ends 27a are arcuate, the rib 13 is inserted with a deviation from the slit 24. Even so, since the rib 13 is always guided by any one of the adjacent guide slopes 26 forming the protrusion 27, the rib 13 can be guided more smoothly and surely to the slit 24 (regular position). .

  In addition, since the lower end of the guide slope 26 is located below the upper end 24a of the slit 24, the rib 13 is reliably guided to the slit 24 (regular position) even when the rib 13 does not fit into the upper end 24a of the slit 24. can do.

10 Pin 11 Head 12 Shaft 13 Rib 14 Groove 15 Recess 20 Grommet 21 Insertion Hole 21a Entrance-side Hole Edge 22 Leg 23 Hook 24 Slit 24a Slit Top 25 Claw 26 Guide Slope 27 Projection 27a Projection Tip (top)
28 Inlet slope 100 clip

Claims (5)

A pin having a head, a shaft portion provided below the head portion, and a rib projecting from a part of the shaft portion;
A substantially cylindrical leg part that forms an insertion hole into which the pin is inserted, a flange part protruding from the upper outer periphery of the leg part, and a lower side end of the leg part provided on the leg part A plurality of slits extending to the vicinity of the lower surface of the buttock, and a grommet having
With
As the rib enters the slit when the pin is inserted into the insertion hole, the grommet can hold the pin in a retaining state,
When the pin is further press-fitted into the insertion hole, as the slit expands, the leg can be bent and deformed toward the flange,
A clip, wherein a guide slope for guiding the rib to the slit is formed continuously on both sides in the circumferential direction of the slit on the inner peripheral surface of the leg portion. 2. The grommet according to claim 1, wherein the grommet has an introduction-side inclined surface that is inclined toward the slit in a region between the slits adjacent to each other in the circumferential direction, which is an entrance-side hole edge of the insertion hole. The described clip. The clip according to claim 1 or 2, wherein adjacent guide slopes form protrusions. The clip according to claim 3, wherein the tip of the protrusion is formed in an arc shape. The clip according to any one of claims 1 to 4, wherein a lower end of the guide slope is positioned below an upper end of the slit.

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