Collar materials and vehicle parts

Abstract

To suppress influence due to adhesion of a molten resin to a collar member, in a collar member fitted into a resin molded body with thermal press fitting.SOLUTION: A metal collar member 3 that is fitted into a resin member, has an annular part 4 formed in an annular shape, and a protruding claw part 6 provided in a part of the annular part 4 in a circumferential direction and protruding from a peripheral surface of the annular part 4 toward the outside in a radial direction of the annular part 4.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a collar member and a vehicle part. [Background technology]

[0002] For example, Patent Document 1 discloses a bumper mounting structure in which an energy absorber is positioned between a bumper cover and a bumper reinforcement. In Patent Document 1, the energy absorber abuts against the bumper reinforcement. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-6888 Summary of the Invention [Problem to be solved by the invention]

[0004] However, if the distance between the bumper cover and the bumper reinforcement is large, a space will be formed between the energy absorber and the bumper reinforcement. To fill this space, it is possible to install a resin molded body. In such a case, it is preferable to provide a metal collar member on the resin molded body so that the resin molded body can be fastened with a bolt.

[0005] Insert molding, in which a metal part is placed inside a mold and the resin molded body is then injection molded, is a known method for providing a metal part in a resin molded body. However, insert molding can be difficult when the resin molded body is large. In such cases, a method of fitting a collar part to the resin molded body by hot press-fitting, in which a heated collar part is pressed into a predetermined location on the resin molded body, is considered. However, the heat of the collar part during hot press-fitting can melt the resin molded body, causing molten resin to adhere to the contact surface of the collar part with the bolt, etc. If molten resin adheres to the contact surface of the bolt, etc., the contact surface between the bolt and the collar part is reduced, which can cause rattles in the resin molded body.

[0006] The present invention has been made in consideration of the above-mentioned problems, and aims to suppress the effects of molten resin adhering to a collar member that is fitted into a resin molded body by thermal pressing. [Means for solving the problem]

[0007] The present invention employs the following configuration as a means for solving the above problems.

[0008] A first aspect of the present invention is a metal collar member that is fitted into a resin molded body, and has a ring-shaped annular portion and a protruding claw portion that is provided on a portion of the annular portion in the circumferential direction and protrudes radially outward from the circumferential surface of the annular portion.

[0009] A second aspect of the present invention is the first aspect, wherein a plurality of the protruding claws are arranged with the central part of the annular part sandwiched between them.

[0010] A third aspect of the present invention adopts a configuration in which, in the first or second aspect, the protruding claw portion has a first surface facing in the same direction as a first end surface, which is one of the end surfaces of the annular portion in a direction perpendicular to the radial direction, and the first surface is positioned displaced relative to the first end surface on the opposite side to the direction in which the first end surface faces.

[0011] A fourth aspect of the present invention is the third aspect, wherein the first end surface is a surface against which a metal fastening component that fastens the collar member to an external member comes into contact.

[0012] A fifth aspect of the present invention is any one of the first to fourth aspects, wherein the annular portion has a straight portion that extends linearly and a curved portion that curves when viewed from a direction perpendicular to the radial direction, and the protruding claw portion protrudes from the circumferential surface of the straight portion toward the radial outside of the annular portion.

[0013] A sixth aspect of the present invention is a vehicle part to be attached to a vehicle body, which is configured to include a collar member of any one of the first to fifth aspects and the resin molded body into which the collar member is fitted.

[0014] A seventh aspect of the present invention is the sixth aspect, wherein the peripheral surface of the annular portion is spaced apart from the resin molded body in a region in the circumferential direction where the protruding claw portion is not provided. [Effects of the Invention]

[0015] According to the present invention, the collar member has protruding claws provided on a portion of the circumference of the annular portion. Therefore, by abutting the protruding claws against the resin molded body, the collar member can be prevented from falling off from the resin molded body. According to the present invention, the annular portion can be fitted into the resin molded body with the circumferential surface of the annular portion spaced apart from the resin molded body. Therefore, when the collar member is hot-pressed into the resin molded body, the portions that are strongly pressed into the resin molded body are retained by the protruding claws. As a result, the portions to which the molten resin adheres are limited to the protruding claws. Therefore, when the collar member is fitted into the resin molded body by hot-pressing, it is possible to suppress the effects of the molten resin adhering to the collar member. [Brief explanation of the drawings]

[0016] [Figure 1]1 is a schematic cross-sectional view of the front part of a vehicle equipped with a bracket assembly 1 according to one embodiment of the present invention. [Figure 2] FIG. 1 is a front view schematically showing a bracket assembly according to an embodiment of the present invention. [Figure 3] FIG. 2 is a schematic enlarged front view of a fastening portion provided in a bracket assembly according to one embodiment of the present invention. [Figure 4] 1 is a schematic enlarged cross-sectional view of a fastening portion provided in a bracket assembly according to one embodiment of the present invention. FIG. [Figure 5] 1 is a schematic enlarged front view of a metal collar member included in a bracket assembly according to one embodiment of the present invention. FIG. [Figure 6] 1 is a schematic enlarged cross-sectional view of a metal collar member included in a bracket assembly according to one embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0017] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a collar member and a vehicle component according to the present invention will now be described with reference to the drawings.

[0018] 1 is a schematic cross-sectional view of the front of a vehicle 100 equipped with a bracket assembly 1 (vehicle component) of this embodiment. As shown in FIG. 1, the vehicle 100 is equipped with a bumper cover 101, an absorber 102, a bumper reinforcement 103 (vehicle body), and a fastening unit 104 in addition to the bracket assembly 1.

[0019] The bumper cover 101 is installed at the front of the vehicle 100 and covers the bracket assembly 1, the absorber 102, the bumper reinforcement 103, and the fastening unit 104 so that they cannot be seen from the front. As shown in Fig. 1, the back surface of the bumper cover 101 is arranged to face the absorber 102. The front surface of the bumper cover 101 faces away from the absorber 102 and is a design surface that can be seen from the outside.

[0020] The absorber 102 is made of, for example, foamed resin, and absorbs collision energy when an object collides with the vehicle 100. The absorber 102 is connected to the bracket assembly 1 by a locking mechanism or a fastening mechanism (not shown). The absorber 102 is supported by a bumper reinforcement 103 via the bracket assembly 1.

[0021] The bumper reinforcement 103 is a metal frame member that receives a load when an object collides with the vehicle 100. As shown in FIG. 1, the bracket assembly 1 of this embodiment is fastened to the bumper reinforcement 103 via a fastening unit 104. In other words, the bumper reinforcement 103 supports the bracket assembly 1 of this embodiment.

[0022] The fastening unit 104 is a metal fastening component that fastens the bracket assembly 1 of this embodiment to the bumper reinforcement 103. In this embodiment, the fastening unit 104 includes a bolt 105 and a washer 106. The bolt 105 passes through the bracket assembly 1 of this embodiment, and the shaft portion is screwed into the bumper reinforcement 103. The washer 106 is interposed between the head of the bolt 105 and the bracket assembly 1 of this embodiment. Note that the fastening unit 104 may also be a washer-bolt in which the bolt and washer are integrated.

[0023] The bracket assembly 1 of this embodiment includes a resin member 2 (resin molded body) and a metal collar member 3 (collar member). The resin member 2 is formed by injection molding of resin. In other words, the resin member 2 is a resin molded body. FIG. 2 is a front view schematically showing the bracket assembly 1 of this embodiment. As shown in FIGS. 1 and 2, the resin member 2 has a main body portion 2a and a fastening portion 2b.

[0024] The main body 2a is a base that supports the absorber 102. As shown in FIG. 1, the main body 2a is formed hollow and open toward the bumper reinforcement 103. The fastening portions 2b are provided so as to protrude downward from the lower edge of the main body 2a. As shown in FIG. 2, in this embodiment, three fastening portions 2b are provided. Note that the number of fastening portions 2b is an example and can be changed. Each of these fastening portions 2b is a portion to which a metal collar member 3 is attached.

[0025] FIG. 3 is a schematic enlarged front view of the fastening portion 2b. FIG. 4 is a schematic enlarged cross-sectional view of the fastening portion 2b. Note that the fastening unit 104 is omitted in FIG. 3. Note that the fastening unit 104 is shown by an imaginary line in FIG. 4. As shown in FIGS. 3 and 4, a fitting hole 2c into which the metal collar member 3 is fitted is provided through the fastening portion 2b. A recess 2d is provided at a portion of the edge of the fitting hole 2c to accommodate a protruding claw portion 6 of the metal collar member 3, which will be described later. Note that in this embodiment, two protruding claw portions 6 are provided on the metal collar member 3. Therefore, two recesses 2d are provided for one fitting hole 2c.

[0026] The metal collar member 3 is a metal component that is fitted into the resin member 2 and against which the fastening unit 104 abuts. The metal collar member 3 is formed of, for example, iron. The metal collar member 3 is fastened to the bumper reinforcement 103 by the fastening unit 104, thereby fixing the bracket assembly 1 of this embodiment to the bumper reinforcement 103. A metal collar member 3 is provided for each fastening portion 2b of the resin member 2. That is, in this embodiment, three metal collar members 3 are provided. Note that the number of metal collar members 3 is an example and can be changed.

[0027] Fig. 5 is a schematic front view of the metal collar member 3. Fig. 6 is a schematic cross-sectional view of the metal collar member. As shown in these figures, the metal collar member 3 has an annular portion 4, a flange portion 5, and protruding claw portions 6.

[0028] The annular portion 4 is a portion formed in an annular shape surrounding the axial center L. In the following description, the direction along the axial center L is referred to as the axial direction, and the direction centered on the axial center L and perpendicular to the axial center L is referred to as the radial direction. In addition, in the axial direction, the side where the head of the bolt 105 is located is referred to as the front side, and the side where the shank of the bolt 105 protrudes from the head is referred to as the rear side.

[0029] In this embodiment, the annular portion 4 is a cylindrical portion formed in a track shape when viewed from the axial direction. The track shape here refers to a shape having two straight line portions 41 that are parallel to each other with the axial center L therebetween, and a curved portion 42 that curves in an arc shape so as to connect the ends of these straight line portions 41.

[0030] The annular portion 4 has an opening 4a that penetrates in the axial direction. Both end surfaces of the annular portion 4 in the axial direction are flat. Of these end surfaces, one end surface (the end surface facing the front) is an abutment surface 4b (first end surface) with the fastening unit 104. As shown in FIG. 4, the abutment surface 4b is a surface that abuts against the washer 106 of the fastening unit 104. In other words, the abutment surface 4b is a surface that abuts against a metal fastening part (fastening unit 104) that fastens the metal collar member 3 to the bumper reinforcement 103, which is an external member.

[0031] 5 and 6, an outer edge recess 4c is provided on the outer edge of the contact surface 4b of the annular portion 4 in accordance with the formation position of the protruding claw portion 6. The outer edge recess 4c is a recess that is recessed rearward from the contact surface 4b, and is positioned so that its bottom surface (rear end surface) is displaced rearward from the contact surface 4b.

[0032] 3, the peripheral surface 4d of the annular portion 4 is separated from the inner peripheral surface of the fitting hole 2c provided in the fastening portion 2b of the resin member 2 in a portion where the protruding claw portion 6 is not provided. In other words, the peripheral surface 4d of the annular portion 4 is separated from the resin member 2 in a portion where the protruding claw portion 6 is not provided in the circumferential direction centered on the axis L.

[0033] The annular portion 4 is formed to a size that allows it to pass through the track-shaped fitting hole 2c without heating it when viewed from the axial direction. In other words, the annular portion 4 is formed to a shape that allows it to pass through the fitting hole 2c without widening it.

[0034] The flange portion 5 is provided so as to protrude radially outward from the circumferential surface of the annular portion 4. The flange portion 5 is formed in an annular shape surrounding the axis L. For example, as shown in FIG. 6, the flange portion 5 is provided in the rear portion of the annular portion 4. The rear end face of the flange portion 5 and the rear end face of the annular portion 4 are included in the same plane. In other words, the rear end face of the flange portion 5 and the rear end face of the annular portion 4 are flush with each other. Such a flange portion 5 abuts against the back surface of the fastening portion 2b of the resin member 2, as shown in FIG. 4.

[0035] 5, the protruding claws 6 are provided on a portion of the annular portion 4 in the circumferential direction. In this embodiment, a protruding claw 6 is provided for each of the two straight portions 41 of the annular portion 4. In other words, in this embodiment, two protruding claws 6 are provided.

[0036] Each of the protruding claws 6 protrudes radially outward from the peripheral surface 4d of the annular portion 4. The amount of protrusion of each of the protruding claws 6 from the peripheral surface 4d is set so that the protruding claws 6 engage with the outer edge of the fitting hole 2c of the resin member 2 at room temperature. Each of the protruding claws 6 is formed to extend linearly along the linear portion 41. These protruding claws 6 are arranged with the opening 4a, which is the center of the annular portion 4, between them.

[0037] Each protruding claw 6 has a front end surface 6a (first surface) facing in the same direction as the abutment surface 4b, which is one of the end surfaces of the annular portion 4 in the direction perpendicular to the radial direction (axial direction). The front end surface 6a is positioned so as to be displaced relative to the abutment surface 4b on the side opposite (rear side) from the direction in which the abutment surface 4b faces (forward direction). In other words, as shown in FIG. 6, the front end surface 6a is located rearward of the abutment surface 4b. As a result, as shown in FIG. 4, the washer 106 abutting against the abutment surface 4b does not abut against the front end surface 6a.

[0038] When fitting such a metal collar member 3 into the resin member 2 by thermal press-fitting, first heat the metal collar member 3. The heated metal collar member 3 is pressed against the fastening portion 2b of the resin member 2 from the back side so that it overlaps the fitting hole 2c. At this time, the metal collar member 3 is pressed against the fastening portion 2b so that the contact surface 4b of the metal collar member 3 faces the fastening portion 2b.

[0039] When the heated metal collar member 3 is pressed against the fastening portion 2b, the resin fastening portion 2b is heated by the metal collar member 3 and expands, widening the fitting hole 2c. As a result, the protruding claw portion 6 of the metal collar member 3 can pass through the fitting hole 2c. The metal collar member 3 is then cooled, and the fastening portion 2b is also cooled. As a result, the fitting hole 2c shrinks, and the metal collar member 3 is fitted into the fastening portion 2b.

[0040] During such heat press-fitting, only the protruding claws 6 of the metal collar member 3 are pressed firmly against the fastening portion 2b. Therefore, even if resin melted by the heat of the metal collar member 3 adheres to the metal collar member 3, the only place it adheres is the protruding claws 6. Therefore, the molten resin does not adhere to the contact surface 4b of the metal collar member 3, and the resin is prevented from entering between the washer 106 and the metal collar member 3.

[0041] The metal collar member 3 of this embodiment as described above is fitted into the resin member 2. The metal collar member 3 has an annular portion 4 and protruding claw portions 6. The annular portion 4 is formed in an annular shape. The protruding claw portions 6 are provided on a portion of the annular portion 4 in the circumferential direction and protrude from a peripheral surface 4d of the annular portion 4 toward the outside in the radial direction of the annular portion 4.

[0042] In this embodiment, the metal collar member 3 has protruding claws 6 provided on parts of the annular portion 4 in the circumferential direction. Therefore, by abutting the protruding claws 6 against the resin member 2, the metal collar member 3 can be prevented from falling off from the resin member 2. With the metal collar member 3 of this embodiment, the annular portion 4 can be fitted into the resin member 2 with the circumferential surface 4d of the annular portion 4 spaced apart from the resin member 2. Therefore, when the metal collar member 3 is hot-pressed into the resin member 2, the parts that are strongly pressed by the resin member 2 are kept by the protruding claws 6. As a result, the parts to which the molten resin adheres are limited to the protruding claws 6. Therefore, when the metal collar member 3 is fitted into the resin member 2 by hot-pressing, it is possible to suppress the effects of the molten resin adhering to the metal collar member 3.

[0043] In this embodiment, the multiple protruding claws 6 are arranged on either side of the opening 4a of the annular portion 4. According to the metal collar member 3 of this embodiment, the multiple protruding claws 6 are locked to the resin member 2 after fitting, and therefore the metal collar member 3 can be firmly fixed to the resin member 2.

[0044] In this embodiment, the protruding claw portion 6 has a front end surface 6a that faces in the same direction as the abutment surface 4b, which is one of the end faces of the annular portion 4 in a direction perpendicular to the radial direction. The front end surface 6a is disposed displaced relative to the abutment surface 4b on the side opposite to the direction in which the abutment surface 4b faces.

[0045] According to the metal collar member 3 of this embodiment, the washer 106 abutting against the abutment surface 4b does not abut against the front end surface 6a. Therefore, even if molten resin adheres to the front end surface 6a, the molten resin can be prevented from coming into contact with the member abutting against the abutment surface 4b.

[0046] In this embodiment, the contact surface 4b is the surface against which a metal fastening unit 104 that fastens the metal collar member 3 to an external member comes into contact. According to this embodiment, even if molten resin adheres to the front end surface 6a, the molten resin can be prevented from coming into contact with the fastening unit 104. Therefore, the bracket assembly 1 can be stably fastened to the bumper reinforcement 103.

[0047] In this embodiment, the annular portion 4 has a straight portion 41 that extends linearly and a curved portion 42 that is curved when viewed in a direction perpendicular to the radial direction (axial direction). The protruding claw portions 6 protrude from the peripheral surface 4d of the straight portion 41 toward the outside in the radial direction of the annular portion 4. This allows the protruding claw portions 6 to be formed linearly. This makes it easier to form the protruding claw portions 6 than when the protruding claw portions 6 are curved.

[0048] The bracket assembly 1 of this embodiment is attached to a bumper reinforcement 103. The bracket assembly 1 of this embodiment includes a metal collar member 3 and a resin member 2 fitted with the metal collar member 3. This makes it possible to prevent molten resin from adhering to the metal collar member 3.

[0049] Furthermore, in the bracket assembly 1 of this embodiment, the peripheral surface 4d of the annular portion 4 is separated from the resin member 2 in the circumferential direction at a portion where the protruding claw portions 6 are not provided. This prevents the portion of the annular portion 4 where the protruding claw portions 6 are not provided from coming into contact with the resin member 2, thereby preventing the resin member 2 from melting during thermal press-fitting.

[0050] While the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to the above-described embodiments. The shapes and combinations of the components shown in the above-described embodiments are merely examples, and various modifications can be made based on design requirements, etc., without departing from the spirit of the present invention.

[0051] For example, in the above embodiment, a configuration in which two protruding claw portions 6 are provided has been described. However, the present invention is not limited to this. For example, a single protruding claw portion may be provided so as to extend continuously to about halfway in the circumferential direction of the annular portion 4. Also, three or more protruding claw portions 6 may be provided.

[0052] In the above embodiment, the metal collar member 3 is provided on the bracket assembly 1. However, the present invention is not limited to this. For example, the metal collar member 3 can be used for other vehicle parts. In other words, the collar member of the present invention can be used for any vehicle part that includes a resin molded body and a collar member attached to the vehicle body.

[0053] In the above embodiment, the annular portion 4 has a track shape. However, the present invention is not limited to this, and the shape of the annular portion 4 may be a circle or an ellipse. Furthermore, the shape of the annular portion 4 may be a polygon, such as a triangle or a rectangle. [Explanation of symbols]

[0054] 1...bracket assembly (vehicle part), 2...resin member (resin molded body), 3...metal collar member (collar member), 4...annular portion, 4a...opening (center portion), 4b...abutment surface (first end surface), 4c...outer edge recess, 4d...periphery, 5...flange portion, 6...protruding claw portion, 6a...front end surface (first surface), 41...straight portion, 42...curved portion, 100...vehicle, 103...bumper reinforcement (vehicle body), 104...fastening unit (fastening part), 105...bolt, 106...washer, L...axial center

Claims

1. A metal collar member fitted to a resin molded body, an annular portion formed in an annular shape; a protruding claw portion provided on a part of the annular portion in the circumferential direction and protruding from the circumferential surface of the annular portion toward the outside in the radial direction of the annular portion; and the protruding claw portion has a first surface facing in the same direction as a first end surface that is one of the end surfaces of the annular portion in a direction perpendicular to the radial direction, the first surface is disposed so as to be displaced with respect to the first end surface on a side opposite to a direction in which the first end surface faces, An outer edge recess is provided on the outer edge of the first end face in accordance with the position where the protruding claw is formed. A collar member characterized by:

2. 2. The collar member according to claim 1, wherein a plurality of said protruding claws are arranged with the central portion of said annular portion sandwiched therebetween.

3. 3. The collar member according to claim 1, wherein the first end surface is a surface against which a metal fastening part for fastening the collar member to an external member comes into contact.

4. The annular portion has a linear portion that extends linearly and a curved portion that curves when viewed in a direction perpendicular to the radial direction, The collar member according to any one of claims 1 to 3, wherein the protruding claw portion protrudes radially outward from the circumferential surface of the linear portion of the annular portion.

5. A vehicle part to be attached to a vehicle body, The collar member according to any one of claims 1 to 4, the resin molded body fitted with the collar member; A vehicle part comprising:

6. 6. The vehicle component according to claim 5, wherein the peripheral surface of the annular portion is spaced apart from the resin molded body at a portion in the circumferential direction where the protruding claw portion is not provided.

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