JP2008111467A - Reinforcement collar - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve insertion work efficiency of a reinforcement collar, and to realize coming-off prevention while reducing costs by setting a large dimensional tolerance in a fastening hole and the reinforcement collar when providing the reinforcement collar in the fastening hole of a door trim, and to prevent generation of burrs during insertion of the reinforcement collar. <P>SOLUTION: A body part 12a of the reinforcement collar 12 is cylindrically formed by metal material. A band-like loosening prevention part 12b, made of resin material, extending in a circumferential direction is provided on an outer circumference face of the body part 12a. The loosening prevention part 12b is arranged in a substantially center part in an axial direction of the body part 12a. By inserting the reinforcement collar 12 into the fastening hole 10b, the loosening prevention part 12b is deformed and adhered to an inner circumference face of the fastening hole 10b, and loosening of the reinforcement collar 12 is prevented. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a reinforcing collar that reinforces an attachment member when the attachment member is fastened to a counterpart member.

  Conventionally, as a reinforcing collar of this type, for example, as disclosed in Patent Documents 1 and 2, when a resin mounting member is fastened to a metal counterpart member, it is inserted into a fastening hole of the mounting member. What is formed in the shape of a cylinder is known. The outer peripheral surface of the reinforcing collar of Patent Document 1 is knurled. When this reinforcing collar is inserted into the fastening hole of the mounting member, the knurled portion bites into the inner peripheral surface of the fastening hole. This prevents the reinforcing collar from falling off when the mounting member is transported with the reinforcing collar attached.

Further, the reinforcing collar of Patent Document 2 is formed by bending a band-shaped metal plate into an annular shape so that both end portions in the longitudinal direction face each other with a predetermined gap. This reinforcement collar uses the elastic force of the metal plate and press-fits into the fastening hole in a compressed state so that the gap between both ends of the metal plate is small, so that it will not fall out of the fastening hole during transportation. It is to be prevented.
JP-A-9-166123 Japanese Patent Laid-Open No. 2001-300637

  However, in the reinforcing collar of Patent Document 1, the knurled portion of the outer peripheral surface is bitten into the inner peripheral surface of the fastening hole of the mounting member. For this reason, when the reinforcing collar is inserted into the fastening hole, the inner peripheral surface of the fastening hole is scraped off by the knurled portion of the reinforcing collar, and burr like fine needle-like projections are generated around the fastening hole. End up. In this case, when the attachment member is fastened to the mating member, the burr may be in the way and it may be difficult to fasten it in a normal state, which necessitates a work for removing the burr.

  Further, when the outer peripheral surface of the reinforcing collar is bitten into the inner peripheral surface of the fastening hole as in Patent Document 1, the dimensions of the inner diameter of the fastening hole and the outer diameter of the reinforcing collar deviate from the target dimensions. In this case, the reinforcing collar can easily fall off, and conversely, it becomes difficult to insert the reinforcing collar. Therefore, it is necessary to increase the molding accuracy so that both the dimensional tolerance of the fastening hole and the dimensional tolerance of the reinforcing collar are sufficiently small, and it is difficult to reduce the cost.

  Further, when a reinforcing collar is formed by bending a belt-shaped metal plate into an annular shape as in Patent Document 2, if the plate thickness is increased in order to ensure buckling strength, both ends of the metal plate are particularly connected to the fastening holes. It becomes difficult to bend along the inner peripheral surface. For this reason, the inner peripheral surface of the fastening hole may be scraped off by the end portion of the metal plate and the burr as described above may occur.

  The present invention has been made in view of such a point, and the object of the present invention is to provide a dimensional tolerance between the fastening hole and the reinforcing collar when the reinforcing collar is inserted into the fastening hole of the mounting member. It is set to a larger size, lowering the molding accuracy and reducing costs, improving the insertion workability of the reinforcement collar and realizing a reliable stopper, and the mounting member is bounced when the reinforcement collar is inserted. It is intended to eliminate the need for burr removal work.

  In order to achieve the above object, in the present invention, a resin retaining portion that is in close contact with the inner peripheral surface of the fastening hole is provided.

  Specifically, in the first aspect of the invention, a cylindrical metal main body portion that is disposed in a fastening hole that is formed through the attachment member and through which a fastening member for fastening the attachment member to the counterpart member is inserted. And a resin retaining portion that is provided on the outer peripheral surface of the main body portion and is in close contact with the inner peripheral surface of the fastening hole, and is configured to reinforce the fastening hole peripheral portion of the mounting member when fastened by the fastening member; To do.

  According to this configuration, when the reinforcing collar is inserted into the fastening hole of the mounting member, the retaining portion is made of resin, so that the retaining portion deforms along the inner peripheral surface of the fastening hole. At this time, if the gap between the inner peripheral surface of the fastening hole and the outer peripheral surface of the main body is narrower than the target gap, the retaining portion is connected to the inner peripheral surface of the fastening hole and the outer peripheral surface of the main body. It will deform | transform so that it may become thin between, and will be in the state closely_contact | adhered to the internal peripheral surface of a fastening hole. On the contrary, when the clearance between the inner peripheral surface of the fastening hole and the outer peripheral surface of the main body portion of the reinforcing collar is wide, the retaining portion is not so thin and is in close contact with the inner peripheral surface of the fastening hole. That is, even if the dimensional tolerances of the fastening hole and the reinforcing collar are made larger than before, it is possible to absorb the dimensional tolerance by deforming the retaining portion so as to correspond thereto. Further, since the retaining portion is deformed when the reinforcing collar is inserted, the inner peripheral surface of the fastening hole of the mounting member is not scraped by the reinforcing collar, and burr does not occur.

  According to a second aspect of the present invention, in the first aspect of the present invention, the retaining portion is provided except for one end portion in the axial direction on the outer peripheral surface of the main body portion.

  According to this configuration, since there is no retaining portion at one end in the axial direction of the reinforcing collar, when the reinforcing collar is inserted into the fastening hole, the insertion force at the initial stage of insertion is reduced by starting to insert from the one end. It becomes possible.

  In the invention of claim 3, in the invention of claim 1 or 2, a plurality of retaining portions are provided at intervals in the circumferential direction of the main body.

  According to this configuration, it is possible to reduce the amount of resin that forms the retaining portion.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the retaining portion is formed in a layer shape that becomes thinner as it approaches one end portion in the axial direction of the main body portion.

  According to this configuration, when the reinforcing collar is inserted into the fastening hole, the insertion force is reduced in the initial stage of insertion by starting to insert from one end side in the axial direction, and gradually increases as the insertion is deeper from there. Is possible.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the retaining portion is made of nylon.

  According to this configuration, it is possible to reduce the cost by configuring the retaining portion with a general material.

  According to the first aspect of the present invention, since the resin retaining portion is provided on the outer peripheral surface of the metal main body portion, the dimensional tolerances of the fastening hole and the reinforcing collar are set to be larger than the conventional one, and the molding accuracy of both is set. The insertion workability of the reinforcing collar can be improved while reducing the cost and the cost can be reduced. Furthermore, since no burr occurs around the fastening hole of the mounting member, the removal work can be eliminated.

  According to the invention of claim 2, since there is no retaining portion at one axial end portion of the outer peripheral surface of the main body portion, the reinforcement collar can be started to be inserted into the fastening hole with a small force, and the insertion workability is further improved. Can be.

  According to the invention of claim 3, since a plurality of retaining portions are provided at intervals in the circumferential direction of the main body portion, the amount of the resin constituting the retaining portion is reduced to reduce the cost while reducing the cost of the reinforcing collar. Removal from the fastening hole can be prevented.

  According to the fourth aspect of the present invention, the retaining portion is provided in a layered manner on the outer peripheral surface of the main body portion, and the thickness thereof is made thinner toward the one end portion in the axial direction of the reinforcing collar. Therefore, when inserting the reinforcing collar into the fastening hole The force can be increased gradually and the reinforcing collar can be inserted smoothly.

  According to the fifth aspect of the present invention, the retaining portion can be made at low cost.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

  FIG. 1 shows a state in which a door trim 10 of an automobile is fastened to a door inner panel 11 with bolts B using a reinforcing collar 12 according to an embodiment of the present invention. The door trim 10 is formed by integrally molding a resin material. As shown in FIG. 2, a flange 10 a is provided at the peripheral edge of the door trim 10. A plurality of fastening holes 10b are formed through the flange 10a. The door inner panel 11 is made of, for example, a steel plate that is harder than the resin material constituting the door trim 10. As shown in FIGS. 1 and 3, the door inner panel 11 has a through hole 11a corresponding to the fastening hole 10b. A nut C is fixed to the periphery of the through hole 11a on the back surface of the door inner panel 11 so as to coincide with the through hole 11a. The nut C is a washer-integrated type. The door trim 10 is an attachment member, and the door inner panel 11 is a counterpart member.

  As shown in FIG. 4, the reinforcing collar 12 has a cylindrical main body portion 12a having an inner hole through which the shaft portion of the bolt B is inserted, and a layer shape protruding from the outer peripheral surface on the outer peripheral surface of the main body portion 12a. And has a symmetrical shape with the central portion in the axial direction as the center of symmetry. The main body 12a is made of a metal material such as a steel material. The outer diameter D1 (shown in FIG. 5A) of the main body 12a is set slightly smaller than the inner diameter D2 (shown in the same figure) of the fastening hole 10b. The metal material that constitutes the main body portion 12a is not limited to a steel material, and any material that has a higher hardness than the material that constitutes the door trim 10 may be used.

  As shown in FIG. 4, the retaining portion 12 b is made of nylon, and as shown in FIG. 4, the retaining portion 12 b has a strip shape continuously extending over the entire circumference at the substantially central portion in the axial direction on the outer peripheral surface of the main body portion 12 a, and is made of an adhesive. It is fixed to the outer peripheral surface of the main body 12. The width of the retaining portion 12b is set to 1/3 of the dimension of the main body portion 12a in the axial direction. Therefore, as shown in FIG. 4B, the region on the axial direction one side (lower side in FIG. 4B) 1/3 and the other side (upper side in FIG. 4) 1 / The region 3 is not provided with the retaining portion 12b. Moreover, the thickness of the retaining portion 12b is gradually reduced toward the both sides in the width direction, that is, the both ends in the axial direction of the main body portion 12a, and the thickness in the center portion in the width direction is the thickest. The thickness of the central portion in the width direction of the retaining portion 12b is set to be thicker than ½ of the dimensional difference between the outer diameter of the main body portion 12a and the inner diameter of the fastening hole 10b.

  If the dimension of the retaining portion 12b in the width direction is short, when the reinforcing collar 12 is inserted into the fastening hole 10b, the reinforcing collar 12 is not stabilized and its axis is inclined with respect to the axis of the fastening hole 10b. There is a risk of becoming. In order to avoid this, in the present embodiment, the dimension in the width direction of the retaining part 12b is set to a dimension of 1/3 or more in the axial direction of the main body part 12a as described above.

  The resin material that constitutes the retaining portion 12b is not limited to nylon, but may be any material that has a lower hardness than the metal material that constitutes the main body portion 12a. For example, the resin material has strong adhesiveness to metal. It may be an epoxy resin, an acrylic resin, a fluororesin such as polytetrafluoroethylene, a compound of the fluororesin, or the like. Further, the resin material constituting the retaining portion 12b may be a thermosetting resin, a thermoplastic resin, or a mixture of a plurality of types of resins.

  Next, a method for manufacturing the reinforcing collar 12 will be described. First, the main body 12a is obtained by stamping a solid metal material. Then, for example, powdery nylon is bonded to the outer peripheral surface of the main body 12a using a known adhesive to obtain the retaining portion 12b. As a method for fixing nylon, in addition to a method using an adhesive, for example, a welding method may be mentioned.

  A procedure for fixing the door trim 10 to the door inner panel 11 using the reinforcing collar 12 obtained as described above will be described. First, the reinforcing collar 12 is inserted into the fastening hole 10 b of the door trim 10. First, as shown in FIGS. 5A and 5B, the reinforcing collar 12 is moved downward from above the fastening hole 10b of the door trim 10, and the axis of the reinforcing collar 10 and the axis of the fastening hole 10b are moved. Match approximately. At this time, the retaining portion 12 is provided except for both axial end portions (upper and lower end portions in FIG. 5) of the main body portion 12a, and the outer diameter D1 of the main body portion 12a is larger than the inner diameter D2 of the fastening hole 10b. Therefore, at the initial stage of insertion, the lower side of the main body 12a can be easily inserted into the fastening hole 10b with a small force. In addition, since the reinforcement collar 12 is symmetrical with respect to the axial direction, it can be inserted in the same manner from either one side or the other side in the axial direction.

  When the lower side of the body portion 12a is inserted into the fastening hole 10b, the thickness of the retaining portion 12b is larger than 1/2 of the dimensional difference between the outer diameter D1 of the body portion 12a and the inner diameter D2 of the fastening hole 10b as described above. Since it is set to be thick, as shown in FIG. 5B, the retaining portion 12b is caught on the peripheral edge of the fastening hole 10b. When the main body portion 12a is pressed downward from this state, the retaining portion 12b is made of a resin material, so that it is pushed and deformed by the peripheral portion of the fastening hole 10b, and as a result, FIG. As shown in FIG. 3, the main body 12a enters deeply into the fastening hole 10b. At this time, since the both sides in the width direction of the retaining portion 12b are formed so as to become gradually thinner, the insertion force gradually increases from a small force.

  The retaining portion 12b has a shape that extends upward from the main body portion 12a opposite to the insertion direction, and extends along the inner peripheral surface of the fastening hole 10b. It adheres to a wide area of the peripheral surface.

  Thus, when the reinforcing collar 12 is inserted, the resin retaining portion 12b comes into contact with the inner peripheral surface of the fastening hole 10b, so that the inner peripheral surface of the fastening hole 10b is scraped by the main body portion 12a. No burr is generated around the fastening hole 10b.

  In addition, since the retaining portion 12b is made of a resin material, when the reinforcing collar 12 is inserted into the fastening hole 10b, the gap between the inner peripheral surface of the fastening hole 10b and the outer peripheral surface of the main body portion 12a is aimed. If it is narrower than that, the retaining portion 12b is deformed so as to be thinner between the inner peripheral surface of the fastening hole 10b and the outer peripheral surface of the main body portion 12a. Easy to do. On the other hand, when the gap between the inner peripheral surface of the fastening hole 10b and the outer peripheral surface of the main body 12a of the reinforcing collar 12 is wide, the retaining portion 12b does not become so thin and adheres closely to the inner peripheral surface of the fastening hole 10b. It will be in the state. In other words, even if the dimensional tolerances of the fastening hole 10b and the reinforcing collar 12 are made larger than before, the dimensional tolerance can be absorbed by the retaining portion 12b being deformed so as to correspond thereto.

  After the reinforcing collar 12 is inserted into the fastening hole 10b as described above, the door trim 10 is conveyed to a place where the door trim 10 is assembled to the door inner panel 11. During this conveyance, vibration and impact may be applied to the door trim 10, but since the retaining portion 12 b is in close contact with the inner peripheral surface of the fastening hole 10 b, the reinforcing collar 12 is prevented from falling off. Further, even when heat is applied, the retaining portion 12b is in close contact with the inner peripheral surface of the fastening hole 10b, so that a difference in thermal expansion between the main body portion 12a and the door trim 10 can be absorbed. 12 is prevented from falling off.

  At the assembly location, the fastening hole 10b of the door trim 10 is aligned with the through hole 11a of the door inner panel 11, and the bolt B is inserted into the reinforcing collar 12 and the through hole 11a and screwed into the nut C. By tightening the bolt B, the door trim 10 is fastened to the door inner panel 11. When the bolt B is tightened, the flange 10a of the door trim 10 is not crushed and damaged by the tightening force because the reinforcing collar 12 is inserted into the fastening hole 10b.

  As described above, according to the reinforcing collar 12 according to this embodiment, since the resin retaining portion 12b is provided on the outer peripheral surface of the main body portion 12a, the dimensional tolerances of the fastening hole 10b and the main body portion 12a are made larger than those of the related art. In addition, it is possible to improve the insertion workability of the reinforcing collar 12 and to surely prevent it from coming off while setting the size larger to reduce the molding accuracy of both of them and to reduce the cost. Further, since no burr is generated around the fastening hole 10b of the door trim 10, the removal work can be made unnecessary.

  Further, since there is no retaining portion 12b at one end in the axial direction on the outer peripheral surface of the main body portion 12a, the reinforcing collar 12 can be started to be inserted into the fastening hole 10b with a small force, and the insertion workability can be further improved.

  Further, since the retaining portion 12b is provided in a layered manner on the outer peripheral surface of the main body portion 12a, and the thickness thereof is made thinner toward the one end portion in the axial direction of the reinforcing collar 12, the force when inserting the reinforcing collar 12 into the fastening hole 10b. Can be gradually increased, and the reinforcing collar 12 can be smoothly inserted.

  Moreover, since the retaining portion 12b is made of nylon, the cost of the reinforcing collar 12 can be reduced.

  Further, since the retaining portion 12a is provided except for both axial end portions on the outer peripheral surface of the main body portion 12a, when the reinforcing collar 12 is inserted into the fastening hole 10b, the main body portion 12a is opposite to the case described above in the axial direction. Even so, it can be inserted in the same way. That is, since the reinforcing collar 12 has no directionality at the time of insertion, the insertion workability can be further improved.

  Further, when the reinforcement collar 12 is to be removed from the door trim 10, for example, when the door trim 10 is discarded, the reinforcement collar 12 can be easily removed from the fastening hole 10 b by simply hitting the reinforcement collar 12 in the center line direction.

  Note that the retaining portion 12b may be provided on the entire other portion except for one end in the axial direction of the main body 12a, as in Modification 1 shown in FIG. Further, a plurality of retaining portions 12b may be provided on the outer peripheral surface of the main body portion 12a at intervals in the circumferential direction as in the second modification shown in FIG. These retaining portions 12a have a shape extending long in the circumferential direction of the main body portion 12a, and are formed such that the closer to both ends in the longitudinal direction, the thinner and the width direction dimensions become shorter. In the second modification, by providing a plurality of retaining portions 12b at intervals in the circumferential direction, the fastening hole 10b of the reinforcing collar 12 can be reduced while reducing the amount of resin used for the retaining portions 12b and reducing the cost. Can be prevented from coming off. The number of retaining portions 12b may be three or more. Further, the retaining portion 12b may be provided on the outer peripheral surface of the main body portion 12a with an interval in the axial direction.

  Moreover, in the said embodiment, although the fastening member is the volt | bolt B, a screw etc. may be sufficient, for example. The bolt may be of a separate washer type.

  Further, the reinforcing collar 12 according to the present invention can be used in addition to the case where the door trim 10 is fastened to the door inner panel 11. For example, although not shown, as a resin vehicle interior product, an instrument panel, molding It can be used when fastening a ceiling, a console or the like. The present invention is particularly effective when a difference in thermal expansion occurs between the main body portion of the reinforcing collar and the mounting member. Further, the mounting member may be a casting of an aluminum alloy or a magnesium alloy other than the resin.

  As described above, the reinforcing collar according to the present invention can be used, for example, when a resin member is fastened to a metal member.

It is a longitudinal cross-sectional view which shows the state which fastened the door trim to the door inner panel using the reinforcement collar which concerns on embodiment of this invention. It is a perspective view of a door trim. It is a disassembled perspective view of a door trim and a door inner panel. (A) is a perspective view of a reinforcing collar, (b) is a side view of the reinforcing collar, and (c) is a plan view of the reinforcing collar. (A) is a figure which shows the state before inserting a reinforcement collar in a fastening hole, (b) is a figure which shows the state which inserted only the lower side of a reinforcement collar in a fastening hole, (c) It is a figure which shows the state which inserted the reinforcement collar completely in the fastening hole. It is FIG.4 (b) equivalent figure which concerns on the modification 1 of embodiment. FIG. 4A is a diagram corresponding to FIG. 4B, and FIG. 4B is a diagram corresponding to FIG.

Explanation of symbols

10 Door trim (mounting member)
10b Fastening hole 11 Door inner panel (mating member)
11a Through-hole 12 Reinforcement collar 12a Main body 12b Retaining part B Bolt (fastening member)
C nut

Claims (5)

A cylindrical metal main body portion that is disposed in a fastening hole that is formed through the attachment member, and through which a fastening member for fastening the attachment member to the counterpart member is inserted,
A resin retaining part provided on the outer peripheral surface of the main body part and in close contact with the inner peripheral surface of the fastening hole;
A reinforcing collar that reinforces the periphery of the fastening hole of the mounting member when fastened by the fastening member. The reinforcing collar according to claim 1,
The retaining collar is provided except for one end in the axial direction on the outer peripheral surface of the main body. The reinforcing collar according to claim 1 or 2,
A reinforcing collar, wherein a plurality of retaining portions are provided at intervals in the circumferential direction of the main body. The reinforcing collar according to any one of claims 1 to 3,
A retaining collar, wherein the retaining portion is formed in a layer shape that becomes thinner as it approaches one end in the axial direction of the main body. The reinforcing collar according to any one of claims 1 to 4,
Reinforcement collar, characterized in that the retaining part is made of nylon.

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