JP4425160B2 - clip - Google Patents

Description

  The present invention relates to a clip used when a vehicle door trim is fixed to a body panel.

  When a vehicle door trim is fixed to a body panel, a clip composed of grommets and pins may be used. For example, in patent document 1, the external thread part is formed in the outer peripheral surface of a substantially cylindrical pin. On the other hand, on the inner surface of the cylindrical portion of the substantially cylindrical grommet, a spiral protrusion that can engage with the male screw portion is formed.

  With the pins inserted into the grommets and temporarily fixed, the pins and grommets are inserted into the mounting holes formed in the two plates, respectively, and the lower surface of the collar provided on the grommet head is the upper surface of the upper plate In the state of being in contact with the pin, the head of the pin is further pushed into the back of the cylindrical part of the grommet.

  As a result, the screw thread of the male thread part advances through the insertion hole while getting over the thread of the protrusion. On the other hand, a tapered surface is provided in the back of the cylindrical portion of the grommet, and the inner diameter dimension is reduced.

  In addition, a slit is formed in the cylindrical portion along the axial direction, and when the pin is further pushed in with the thread of the male screw portion in contact with the tapered surface, the enlarged diameter portion having the tapered surface is expanded. Diameter. In a state where the diameter-expanded portion is expanded, the plate materials can be fastened together via the clip by sandwiching the plate material between the diameter-expanded portion and the flange portion of the grommet.

  Moreover, when removing a clip from a board | plate material, a pin is rotated and it removes from a grommet, and an enlarged diameter part restore | restores to the original diameter. Thereby, a grommet can be extracted from a board | plate material.

However, in Patent Document 1, no slit is formed on the flange side (base side) of the cylindrical portion, and the diameter of the base side of the cylindrical portion does not increase. For this reason, if the clip is used repeatedly, the thread of the pin will be licked, and the engagement force between the pin and the grommet will be low, and the holding force and the grommet with the two plates fixed will be removed The power becomes smaller.
Japanese Patent Publication No.7-76568

  In view of the above facts, it is an object of the present invention to provide a clip that can maintain the holding force of the clip even after repeated use and has a large extraction force.

  In order to achieve the above object, the invention according to claim 1 is composed of a pin and a grommet, and is attached to an attachment member provided with a female screw portion, and the attached member attached to the pin is attached to the attachment member. A clip to be fixed, wherein the grommet is formed on a base part inserted into the female screw part, a branch piece extending obliquely from the base part and elastically deformed and approaching, and a branch formed on an inner surface of the branch piece A locking surface that is inclined toward the tip of the piece and approaching each other, and a male screw portion that is formed on the outer surface of the tip portion of the branch piece and is screwed with the female screw portion when the branch piece approaches. The pin is formed in the overhanging portion accommodated between the base portion and the locking surface, and formed in the overhanging portion, and when a pulling force is applied, the pin comes into contact with the locking surface, Connected to the wedge surface to spread and the overhang In is smaller than the projecting portion, removal force to the projecting portion, the insertion force, are characterized and the bar portion can be given a rotational force, in that it is configured.

  In the first aspect of the present invention, the grommet includes a base portion that is inserted into the female screw portion. Bifurcated pieces extending obliquely from each other extend from the base and elastically deform to approach each other. Moreover, the external thread part is formed in the outer surface of the front-end | tip part of a branch piece, and it screws together with the female thread part of an attachment member in the state which the branch piece approached mutually.

  When the clip is inserted into the female screw portion, the branch pieces approach each other, so that the inside of the female screw portion can be easily passed. For this reason, it is possible to reduce the insertion force of the clip into the female thread part, and to prevent the thread of the male thread part of the branching piece from being licked when the clip is inserted into the female thread part. However, the holding force of the clip can be maintained.

  On the other hand, although the branch piece is restored in a state where the male screw portion of the branch piece is screwed with the female screw portion, the branch piece is not completely restored but is in a state of being close to each other. That is, the branch piece is stretched toward the female screw portion, and the biting of the male screw portion on the female screw portion is strengthened. Thereby, the holding force of the clip can be increased and the extraction force of the clip can be increased.

  Here, when an extraction force for removing the pin from the grommet is applied, the pins easily come off the grommet when the branching pieces approach each other, but in the present invention, the pin is provided with a wedge surface, Is provided with a locking surface that comes into contact with the wedge surface, and when the pulling force is applied, the wedge surface comes into contact with the engagement surface to push the branch piece apart. Thereby, although it is a clip which is easy to insert, extraction force can be enlarged.

  For this reason, when removing the pin from the grommet, the pin must be rotated, but since the overhang portion is stored between the base portion and the locking surface, the grommet is rotated through the overhang portion. As a result, the pin and the grommet rotate together, and when the clip is removed from the female thread portion, the pin and the grommet can be removed together, and the workability is good.

  According to a second aspect of the present invention, in the clip according to the second aspect, the locking surface and the wedge surface have the same inclination angle. In the invention according to claim 2, by making the inclination angles of the locking surface and the wedge surface the same, the locking surface and the wedge surface come into surface contact, and the branch piece can be surely pushed out.

  According to a third aspect of the present invention, in the clip according to the first or second aspect, an engagement groove is formed on an upper surface of a flange portion provided at a tip portion of the column portion.

  In the invention according to claim 3, by providing the engagement groove on the upper surface of the flange portion, the clip can be rotated using a coin, a screwdriver, or the like, which is convenient when removing the clip from the female screw portion.

  According to a fourth aspect of the present invention, in the clip according to any one of the first to third aspects, an engaged portion is provided at a distal end of the overhang portion, and the base portion is engaged with the engaged portion. A mating engagement portion is provided, and the grommet is temporarily fixed to the pin in a state where the engagement portion is engaged with the engaged portion.

  In the invention according to claim 4, the grommet is temporarily attached to the pin in a state in which the engaged portion is provided in the projecting portion, the engaging portion is provided in the base portion, and the engaging portion is engaged with the engaged portion. Since it is stopped, there is no fear that the grommets or pins will be lost.

  According to a fifth aspect of the present invention, in the clip according to any one of the first to fourth aspects, the distal end portion of the overhang portion is inserted between the root portion of the branch piece and the engaging portion. When this is done, there is an inclined surface that comes into contact with the root portion.

  In the invention according to claim 5, an inclined surface inserted between the root portion of the branch piece and the engaging portion is provided at the tip portion of the overhang portion, and the inclined surface is brought into contact with the root portion. Thus, the outer shape of the tip of the pin can be maintained in a state where the pin and the grommet are engaged.

  The invention according to claim 6 is the clip according to any one of claims 1 to 5, wherein the inner surface of the tip of the branch piece is recessed in an arc shape along the column. And

  In the invention described in claim 6, the inner surface of the tip of the branch piece is recessed in the shape of an arc along the column, so that the thickness of the tip of the branch piece is constant and the holding force of the male screw part is increased. It is placed in the direction so that it is uniform.

  According to a seventh aspect of the present invention, in the clip according to any one of the third to sixth aspects, a lower flange portion is provided in a lower portion of the flange portion in parallel with the flange portion, and is formed on the attached member. The pillar portion is inserted into the notch, and the attached member is sandwiched between the flange portion and the lower flange portion.

  In the invention according to claim 7, the lower flange portion is provided at the lower portion of the flange portion, the column portion is inserted into the notch portion formed in the attached member, and the attached member is sandwiched between the flange portion and the lower flange portion. Thus, the clip can be attached (temporarily fixed) to the attached member. For this reason, since a to-be-attached member can be attached to a mounting member by one touch only by pressing a flange part, an impact becomes unnecessary and workability | operativity is good.

  Since this invention set it as the said structure, in the invention of Claim 1, when a clip is inserted in an internal thread part, since a branch piece will mutually approach, it can let the inside of an internal thread part pass easily. For this reason, it is possible to reduce the insertion force of the clip into the female thread part, and to prevent the thread of the male thread part of the branching piece from being licked when the clip is inserted into the female thread part. However, the holding force of the clip can be maintained.

  In addition, since the branch piece is in a state of being close to each other while the male screw portion of the branch piece is screwed with the female screw portion, the branch piece is stretched toward the female screw portion side, and the male screw portion bites into the female screw portion. Become stronger. Thereby, the holding force of the clip can be increased and the extraction force of the clip can be increased.

  In addition, the pin is provided with a wedge surface, and the grommet is provided with a locking surface that comes into contact with the wedge surface so that when the pulling force is applied, the wedge surface comes into contact with the engagement surface and spreads the branch piece. By doing so, although the clip is easy to insert, the removal force can be increased.

  In the second aspect of the invention, the locking surface and the wedge surface come into surface contact, and the branch piece can be reliably spread.

  In the invention according to claim 3, the clip can be rotated using a coin, a screwdriver or the like, which is convenient when the clip is removed from the female screw portion.

  In the invention according to claim 4, since the grommet is temporarily fixed to the pin in a state where the engaging portion is engaged with the engaged portion, there is no possibility that the grommet or the pin is lost.

  In the invention according to claim 5, the outer surface of the tip end portion of the pin is maintained in a state where the pin and the grommet are engaged by bringing the inclined surface provided at the tip end portion of the overhang portion into contact with the root portion of the branch piece. can do.

  According to the sixth aspect of the present invention, the thickness of the tip of the branch piece is made constant, and the holding force of the male screw portion is placed in the circumferential direction so as to be uniform.

  In the invention according to claim 7, since the clip can be attached (temporarily fixed) to the attached member, the attached member can be attached to the attaching member with one touch only by pressing the flange portion. Impact is unnecessary and workability is good.

  A clip according to an embodiment of the present invention will be described below with reference to the drawings.

  As shown in FIG. 5, a vehicle door trim 10 is fixed to a body panel 14 via a clip 12. As shown in FIG. 2, the clip 12 includes a substantially cylindrical pin 16 and a substantially V-shaped grommet 18 that engages with the pin 16.

  The pin 16 includes a shaft portion 20 as a column portion, and a disc-shaped upper flange portion 22 and a lower flange portion 24 are disposed on one end side of the shaft portion 20 with a predetermined interval therebetween. Between the flange portion 22 and the lower flange portion 24, a columnar neck portion 26 larger than the outer diameter size of the shaft portion 20 is provided. Further, one engagement groove 28 (see FIG. 1) is formed in the diameter direction on the upper surface of the upper flange portion 22.

  On the other hand, the other end side of the shaft portion 20 is provided with a pair of projecting portions 30 that are larger than the outer diameter of the shaft portion 20 and have an arcuate cross section, and the tip end side is tapered. ing. A wedge surface 38 is formed on the lower flange portion 24 side of the overhang portion 30, and the center portion projects so as to be the highest toward the lower flange portion 24 side.

  Further, an engaging recess 32 that is shorter on the tip side than the protruding portion 30 is provided between the protruding portion 30 and the protruding portion 30. An inclined surface 34 protrudes from the distal end side of the engaging recess 32, and the outer surfaces approach each other toward the distal end portion. Further, a rectangular hole 36 as an engaged portion is formed at the tip of the engaging recess 32.

  On the other hand, the grommet 18 includes a base portion 40, and a rectangular parallelepiped engaging rib 42 as an engaging portion is provided at the center of the inner surface of the base portion 40. The engagement rib 42 is engaged with the rectangular hole 36, and the grommet 18 is temporarily fixed in a state where the grommet 18 is prevented from rotating with respect to the pin 16.

  In addition, a pair of first arms (branching pieces) 44 having a circular cross section extending outward are formed from the base portion of the engaging rib 42. A second arm (branch piece) 46 is continuously provided on the first arm 44 and spreads outward at a smaller angle than the first arm 44.

  The width of the first arm 44 and the second arm 46 is substantially the same as that of the engagement recess 32, and the first arm 44 and the second arm are in a state where the engagement rib 42 is engaged with the rectangular hole 36. 46 engages with the engaging recess 32 and constitutes a part of the outer peripheral surface of the pin 16 together with the overhanging portion 30 (see FIG. 1). At this time, the inner surface of the first arm 44 comes into contact with the inclined surface 34 of the engaging recess 32 (see FIGS. 4 and 5), and the position of the first arm 44 is held.

  In addition, an arcuate threaded portion (branch piece) 48 that is wider than the second arm 46 is provided at the distal end portion of the second arm 46 over about 115 ° in the circumferential direction. An external thread 48A is formed on the outer surface of 48 over about 60 °.

  The threaded portion 48 extends outward at a slightly larger angle than the second arm 46. The threaded portion 48 and the second arm 46 can be easily reduced in diameter with the first arm 44 side of the second arm 46 as a fulcrum (see FIGS. 4 and 5).

  In addition, a locking surface 50 is formed at the root portion of the screwing portion 48 so as to incline toward each other toward the tip of the screwing portion 48 (see FIG. 3). The locking surface 50 can come into contact with the wedge surface 38 provided on the pin 16, and the inclination angle of the locking surface 50 is substantially the same as the inclination angle of the wedge surface 38.

  Further, the outer diameter of the male screw portion 48A of the screwing portion 48 is set to be larger than the diameter of the valley of the female screw portion 56A of the weld nut 56 provided in the body panel 14 in the natural state. In a state where the male screw portion 48A and the female screw portion 56A of the weld nut 56 are screwed together, the screwed portion 48 is close to each other and elastically deformed.

  Further, as shown in FIG. 4, the threaded portion 48 is reduced in diameter and smaller than the inner diameter dimension of the female thread portion 56 </ b> A of the weld nut 56, and the grommet 18 is engaged with the pin 16. When the clip 12 is inserted into the weld nut 56, the threaded portion 48 of the grommet 18 is reduced in diameter by the female screw portion 56A of the weld nut 56.

  Next, the operation of the clip 12 according to the embodiment of the present invention will be described.

  As shown in FIGS. 4 and 5, the threaded portion 48 and the second arm 46 can be easily reduced in diameter, and the threaded portion 48 can be smaller than the inner diameter dimension of the female threaded portion 56 </ b> A of the weld nut 56. By making it small, when the clip 12 is inserted into the attachment hole 52, the inside of the attachment hole 52 can be smoothly passed.

  Further, when the clip 12 is inserted into the weld nut 56, the screwing portion 48 of the grommet 18 can be easily reduced in diameter so that the insertion force of the clip 12 into the weld nut 56 can be reduced and the grommet can be reduced. It is possible to prevent the thread of the 18 male screw portions 48A from being licked, and the holding force of the clip 12 can be maintained even after repeated use.

  Further, the outer diameter of the male screw portion 48A of the screwing portion 48 is set to be larger than the diameter of the valley of the female screw portion 56A of the weld nut 56 provided in the body panel 14 in the natural state. The threaded portion 48 and the second arm 46 are restored in a state in which the male threaded portion 48A and the female threaded portion 56A of the weld nut 56 are screwed together, but are not completely restored, but are in close proximity to each other (elastically deformed state) ). That is, the threaded portion 48 is stretched toward the female screw portion 56A, and the biting of the male screw portion 48A to the female screw portion 56A is strengthened. Thereby, the holding force of the clip 12 can be increased and the extraction force of the clip 12 can be increased.

  Further, a wedge surface 38 is formed on the upper surface (the lower flange portion 24 side) of the overhang portion 30, and the center portion protrudes toward the lower flange portion 24 side. A locking surface 50 is formed which is inclined in a direction approaching each other toward the front end portion of 48.

  Since the threaded portion 48 can be elastically deformed in the diameter reducing direction, when the force is applied in the direction in which the pin 16 is pulled out from the grommet 18, when the diameter of the threaded portion 48 is reduced, the threaded portion 48 is removed from the female threaded portion 56A. It becomes easy to come off.

  For this reason, in the present invention, when an extraction force is applied to the pin 16, the locking surface 50 of the pin 16 comes into contact with the wedge surface 38 of the grommet 18, and the wedge surface 38 is pressed via the locking surface 50. However, at this time, a force is applied in the direction of expanding the screwing portion 48.

  Thereby, the biting of the male screw part 48A of the screwing part 48 and the female screw part 56A of the weld nut 56 increases, and the removal force of the clip 12 increases. That is, although the clip 12 is easy to insert, the removal force can be increased. Here, by making the inclination angles of the wedge surface 38 and the locking surface 50 the same, the wedge surface 38 and the locking surface 50 come into surface contact with each other, and the screwing portion 48 can be further expanded more reliably. .

  On the other hand, when the clip 12 is removed from the weld nut 56, the pin 16 must be rotated. Since the engagement groove 28 is provided on the upper surface of the upper flange portion 22, the pin 16 is rotated using a coin or a screwdriver. This is convenient when the clip 12 is removed from the weld nut 56.

  Here, a rectangular hole 36 is formed at the tip of the pin 16, and a substantially rectangular parallelepiped engaging rib 42 that can be engaged with the rectangular hole 36 is provided on the grommet 18 side to engage with the rectangular hole 36. When the pin 16 is rotated by preventing the grommet 18 from rotating with respect to the pin 16 with the rib 42 engaged, the grommet 18 also rotates together. For this reason, since the grommet 18 and the pin 16 can be removed together when removing the clip 12 from the weld nut 56, workability is good.

  Further, since the pin 16 and the grommet 18 are temporarily fixed together with the engaging rib 42 engaged with the rectangular hole 36, there is no possibility that the grommet 18 or the pin 16 is lost.

  Next, the fixing method which fixes a to-be-attached member to an attachment member using the clip which concerns on embodiment of this invention is demonstrated.

  As shown in FIGS. 1 and 4, the door trim 10 as the attached member is formed with a notch portion 54 through which the neck portion 26 can be inserted, and the neck portion 26 of the pin 16 is inserted into the notch portion 54. .

  The length of the neck portion 26 is substantially the same as the wall thickness of the door trim 10, and the door trim 10 is sandwiched between the upper flange portion 22 and the lower flange portion 24 with the neck portion 26 inserted into the notch portion 54. The clip 12 with the grommet 18 engaged with the pin 16 is temporarily fixed to the door trim 10.

  On the other hand, as shown in FIGS. 1, 2, and 4, a mounting hole 52 is formed in the body panel 14 as a mounting member, and a weld nut 56 is mounted on the peripheral portion of the mounting hole 52. .

  4 and 5, with the clip 12 temporarily fixed to the door trim 10, the tip end of the pin 16 is inserted into the mounting hole 52 formed in the body panel 14 and the female thread 56A of the weld nut 56. Then, the female screw portion 56A of the weld nut 56 is screwed into the male screw portion 48A of the screwing portion 48. Then, the upper flange portion 22 is pressed until the lower surface of the lower flange portion 24 contacts the body panel 14.

  Here, when the male thread portion 48A of the threaded portion 48 gets over the thread of the weld nut 56, the threaded portion 48 is easily reduced in diameter and can pass through the weld nut 56 smoothly. For this reason, the clip 12 can be easily inserted into the weld nut 56.

  A state in which the lower surface of the lower flange portion 24 is in contact with the body panel 14 and a male screw portion 48A of a screw portion 48 of a female screw portion 56A of a weld nut 56 is screwed, and the screw portion 48 is stretched toward the female screw portion 56A. Thus, the male screw portion 48A of the screwing portion 48 bites into the female screw portion 56A of the weld nut 56, the clip 12 is held by the body panel 14, and the door trim 10 is fixed to the body panel 14 via the clip 12.

  In this way, by attaching the clip 12 to the door trim 10 (temporarily fixing), the door trim 10 can be attached with one touch only by pressing the clip 12 against the body panel 14, and the impact becomes unnecessary and the workability is improved. good.

  On the other hand, when removing the clip 12 from the body panel 14, a coin or a driver is engaged in the engagement groove 28 of the upper flange portion 22, and the pin 16 is rotated. At this time, since the pin 16 and the grommet 18 rotate together, the grommet 18 rotates together with the pin 16, the male screw portion 48A of the screwing portion 48 comes off from the female screw portion 56A of the weld nut 56, and the clip 12 is removed from the body panel. 14 off.

  In addition, this form is an Example to the last, and it cannot be overemphasized that it can change suitably in the range which does not deviate from the main point of this invention. For example, although two branch pieces are used here, four branch pieces may be provided.

It is a perspective view which shows the method of fixing a door trim to a body panel using the clip which concerns on embodiment of this invention. It is a disassembled perspective view which shows the clip concerning embodiment of this invention. It is a front view showing a clip concerning an embodiment of the invention. It is sectional drawing which shows the clip concerning embodiment of this invention, and has shown the state which fixes a door trim to a body panel. It is sectional drawing which shows the clip concerning embodiment of this invention, and has shown the state which fixed the door trim to the body panel.

Explanation of symbols

10 Door trim (attached member)
12 Clip 14 Body panel (Mounting member)
16 pin (clip)
18 Grommet (Clip)
20 Shaft (column)
22 Upper flange (flange)
24 Lower flange portion 28 Engaging groove 30 Overhang portion 32 Engaging recess portion 34 Inclined surface 36 Rectangular hole (engaged portion)
38 Wedge surface 40 Base 42 Engaging rib (engaging portion)
44 First arm (branch piece)
46 Second arm (branch piece)
48A Male thread part 48 Screw part (Branch change)
50 Locking surface

Claims (7)

A clip comprising a pin and a grommet, attached to an attachment member provided with an internal thread, and fixing a member to be attached attached to the pin to the attachment member,
The grommet has a base inserted into the female screw part, a branch piece extending obliquely from the base part and approaching by elastic deformation, and approaching each other toward the tip of the branch piece formed on the inner surface of the branch piece A locking surface that is inclined in a direction to be formed, and a male screw portion that is formed on the outer surface of the distal end portion of the branch piece and is screwed with the female screw portion in a state where the branch piece approaches
The pin is formed in the overhanging portion that is accommodated between the base portion and the locking surface, and the overhanging portion. When a pulling force is applied, the pin abuts on the locking surface and pushes the branch piece. A wedge surface that is widened, and a pillar portion that is connected to the overhanging portion and has a diameter smaller than that of the overhanging portion and that can provide a removal force, an insertion force, and a rotational force to the overhanging portion. To clip.   The clip according to claim 1, wherein the inclination angle of the locking surface and the wedge surface is the same.   The clip according to claim 1 or 2, wherein an engagement groove is formed on an upper surface of a flange portion provided at a tip portion of the column portion.   An engaged portion is provided at the tip of the overhang portion, an engaging portion that can be engaged with the engaged portion is provided at the base portion, and the engaging portion is engaged with the engaged portion. The clip according to any one of claims 1 to 3, wherein the grommet is temporarily fixed to the pin in a state of being cut.   The tip part of the said overhang | projection part has an inclined surface which contact | abuts a root part, when it inserts between the root part of the said branch piece, and the said engaging part. The clip according to claim 1.   The clip according to any one of claims 1 to 5, wherein an inner surface of a distal end portion of the branch piece is recessed in an arc shape along the column portion.   A lower flange portion is provided at a lower portion of the flange portion in parallel with the flange portion, the column portion is inserted into a notch portion formed in the attached member, and the attached member is formed by the flange portion and the lower flange portion. The clip according to any one of claims 3 to 6, wherein the clip is sandwiched.

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