JP5767176B2 - Fastening structure for vehicle members - Google Patents

Description

  The present invention relates to an improvement in a structure for fastening a resin vehicle member with a bolt.

  In a vehicle, a resin part that is attached to the vehicle body using bolts and nuts, for example, as shown in FIG. 12 showing a cross-sectional image of the attachment hole, the attachment part of the resin part can withstand a predetermined tightening axial force. The bolt hole of the mounting portion is reinforced by a metal collar. For example, Patent Document 2 discloses a fastening structure using bolts of such resin parts. In Patent Document 2, a cylindrical bolt fastening portion which is a part of the resin part includes a through hole into which a bolt is inserted and a groove-shaped collar housing portion formed around the through hole. A cylindrical metal collar is fitted into the collar housing portion. In addition, the collar can be used for a plurality of through holes having different diameters, and therefore, the collar has an inner diameter larger than the maximum diameter of the plurality of through holes. have.

JP 2008-24248 A Japanese Utility Model Publication No. 4-37020

  FIG. 13 is a cross-sectional view schematically showing a state in which a bolt fastening portion, which is a part of a resin part in Patent Document 2, and a metal collar are combined. As shown in FIG. 13, the dimension [1] requires a minimum thickness (for example, about 2 mm) that allows resin molding. Further, in order to ensure workability for fitting the collar into the collar housing portion, a gap of dimension [2] is required to some extent. Therefore, there is a problem that the diameter [3], which is the diameter of the collar and the diameter of the bolt fastening portion of the resin component, is increased.

  Further, since the inner diameter of the collar is larger than the maximum diameter dimension among the plurality of types of the through holes, the cylindrical portion indicated by the dimension [1] in FIG. 13 may be thick. Due to the influence of the draft angle of the resin part, deformation at the time of molding, etc., there is a problem that it is difficult to accurately manage the radial dimension over the entire axial length L of the bolt fastening portion. The above problems are not known.

  The present invention has been made in the background of the above circumstances, and the object of the present invention is for a vehicle that can keep the outer shape of the bolt fastening portion small and can easily manage the dimensions of the bolt fastening portion. The object is to provide a fastening structure for members.

The gist of the first invention for achieving the above object is as follows: (a) a bolt fastening portion in which a part of a resin member is formed and a through hole is formed, and a metal that is inserted into the through hole. A fastening structure in which a cylindrical collar is fastened to a mating part by a bolt inserted inside the collar, and (b) the bolt fastening portion is formed on the through-hole so as to face the bolt. comprising a plurality of pairs of projections projecting from the inner peripheral surface, (c) said collar is provided with a cutout of a plurality of pairs of notched opening in the axial direction corresponding to the projections of the bolt fastening section, (d) the The plurality of pairs of cutouts have a cutout in which the circumferential cutout width of the collar is the first cutout width, and a second cutout width in which the circumferential cutout width of the collar is wider than the first cutout width. (E) the plurality of pairs of protrusions from the inner peripheral surface of the through hole. Height out is being greater than the wall thickness of the collar.

In this way, the bolt can be restrained in the radial direction according to the protrusion amount (protrusion height) of the protrusion from the inner peripheral surface of the through hole, so that the bolt hole is formed as in Patent Document 2. It is possible to keep the outer shape in the radial direction of the bolt fastening portion small compared with a resin part having a cylindrical portion provided inside the collar. If the outer shape in the radial direction of the bolt fastening portion can be kept small as such, for example, the degree of freedom in design is improved. In addition, since the bolt is basically constrained in the radial direction by a plurality of pairs of protrusions, the dimension management of the bolt fastening portion may be mainly performed by dimension management of a plurality of pairs of protrusions. Compared with a resin part in which a cylindrical portion having a bolt hole formed on the inside of the collar is provided, the dimensions can be easily controlled. Even if the protrusion amount of the protrusion is smaller than the thickness of the collar, the bolt is restrained in the radial direction by the inner diameter of the collar, so that the dimension management is easy. In addition, since there are a plurality of pairs of protrusions opposed to each other through the bolt, the positioning of the bolt fastening portion in the radial direction of the bolt is ensured as compared with the case where the protrusion is a pair. It is easy to improve the insertion of the bolt by providing a slight margin in the radial direction between the bolt and the protrusion.
Further, the plurality of pairs of cutouts include a cutout in which the circumferential cutout width of the collar is a first cutout width, and a second cutout in which the circumferential cutout width of the collar is wider than the first cutout width. And (e) the protrusion height of the plurality of pairs of protrusions from the inner peripheral surface of the through hole is greater than the thickness of the collar, and thus corresponds to the first notch width. A bolt fastening portion including a protrusion having a protrusion width in the circumferential direction and a protrusion having a protrusion width in the circumferential direction corresponding to the second notch width; and a protrusion width in the circumferential direction corresponding to the first notch width. It is possible to use the common collar for any of the bolt fastening portions having only the projections having the same, and at the same time, restrain the bolt in the radial direction by the tip positions of the plurality of pairs of projections. Is possible.

Further, it is an gist of the second invention, the a fastening structure of the first shot Ming vehicle member, the notches of the plurality of pairs of corresponding protrusions (a) said plurality of pairs, the axis of the collar (B) a plurality of pairs of notches that are the same as a plurality of pairs of notches formed at one end of the collar are also formed at the other end of the collar. To do. In this way, it is possible to insert the collar into the through hole of the bolt fastening portion regardless of the axial direction of the collar, thus preventing erroneous assembly and improving the assembly workability. It is possible to make it.

  Preferably, the plurality of pairs of protrusions are formed at one end of the bolt front end side in the axial direction of the bolt fastening portion, and the plurality of pairs of notches corresponding to the plurality of pairs of protrusions are formed on the collar. It is formed at one end of the bolt front end side in the axial direction.

It is sectional drawing showing the fastening structure of the member for vehicles to which this invention was applied. It is the figure which extracted and represented the bolt fastening part and the collar from the fastening structure of FIG. 1, Comprising: It is sectional drawing which shows the AA cross section in FIG. It is the figure which extracted and represented the bolt fastening part and the collar from the fastening structure of FIG. 1, Comprising: It is the bottom view seen from the downward direction of FIG. It is the figure which represented the bolt fastening part of FIG. 2 alone, Comprising: It is the top view seen from the upper direction of FIG. It is the figure which represented the bolt fastening part of FIG. 2 alone, Comprising: It is sectional drawing which shows the BB cross section in FIG. FIG. 3 is a perspective view showing the collar of FIG. 2 alone. FIGS. 3A and 3B are three-sided views showing the collar alone in FIG. 2, in which FIG. 2A is a view of the collar in the first axial direction, and FIG. FIG. 4C is a view of the collar in the direction of arrow XB in FIG. FIG. 5 is a diagram showing another bolt fastening portion in which the protrusion amount of the protrusion is smaller than that of the bolt fastening portion in FIG. 4, and is a plan view of the bolt fastening portion corresponding to FIG. 4. FIG. 9 is a diagram illustrating a fastening structure in which the bolt fastening portion of FIG. 8 and the collar of FIG. 7 are combined, and is a bottom view corresponding to FIG. 3. FIG. 9 is a diagram showing another bolt fastening portion having a protrusion shape different from that of the bolt fastening portion shown in FIGS. 4 and 8, and is a plan view of the bolt fastening portion corresponding to FIG. 4. FIG. 10 is a bottom view corresponding to FIG. 3, illustrating a fastening structure in which the bolt fastening portion of FIG. 10 and the collar of FIG. 7 are combined. It is the figure which showed the general cross-sectional image of the attachment hole of the resin parts attached to a vehicle body using a volt | bolt and a nut in a vehicle. It is sectional drawing which showed typically the state with which the bolt fastening part which is a part of resin parts in patent document 2, and the metal color | collars were combined.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a cross-sectional view showing a fastening structure of a vehicle member to which the present invention is applied. 2 and 3 are views showing the bolt fastening portion 10 and the collar 14 extracted from the fastening structure of FIG. 1, and FIG. 2 is a cross-sectional view showing the AA cross section in FIG. 3 is a bottom view seen from below in FIG. Specifically, FIG. 1 to FIG. 3 show a bolt fastening portion 10 that constitutes a part of a resin member 8 and has a through hole 12 formed therein, and a metal cylindrical collar inserted into the through hole 12. 14 is a fastening structure that is fastened to the mating part 15 by a bolt 13 inserted inside the collar 14. 2 and 3, the bolt 13 and the mating part 15 are not shown for the sake of brevity, but the mating part 15 is lower than the bolt fastening portion 10 and the collar 14 in FIG. The bolt 13 is inserted into the through hole 12 from above in FIG. That is, the arrow AR1 in FIG. 2 represents the insertion direction of the bolt 13. The first axis RC1 is an axis common to the through hole 12, the collar 14 and the bolt 13 of the bolt fastening portion 10. 2 and 3, the bolt fastening portion 10 is illustrated, but the shape of the entire resin member 8 including the bolt fastening portion 10 is not shown. Moreover, the fastening structure of the member for vehicles shown in FIGS. 1-3 can be used for the fastening part of a brake pedal, the fastening part of a shift operation apparatus, etc., for example.

  4 and 5 are views showing the bolt fastening portion 10 as a single unit, FIG. 4 is a plan view seen from above in FIG. 5, and FIG. 5 is a cross-sectional view showing a BB cross section in FIG. It is. The bolt fastening portion 10 is made of a resin such as plastic, and as shown in FIGS. 4 and 5, is a cylindrical cylindrical portion having the first axis RC1 as a central axis. The bolt fastening portion 10 includes a plurality of pairs of protrusions 16a and 16b protruding from the inner peripheral surface 12a of the through hole 12 so as to face each other via the bolt 13 inserted inside the collar 14 (if not particularly distinguished, A projection 16). Specifically, two pairs of protrusions 16 are provided at one end 18 on the bolt front end side in the direction of the first axis RC1.

  Each of the two pairs of protrusions 16 includes an inclined surface 20 on the bolt base end side opposite to the bolt front end side. The inclined surface 20 is inclined from the bolt proximal end side to the bolt distal end side from the proximal end to the distal end of the protrusion 16. Also, all the protrusions 16 shown in FIG. 4 have the same shape and protrude toward the first axis RC1. Further, the two pairs of protrusions 16 are arranged at equal intervals around the first axis RC1. In other words, the four protrusions 16 are arranged around the first axis RC1 with an interval of 90 degrees.

  As can be seen from FIG. 3, the protrusion height Hpj (see FIG. 5) of the protrusion 16 from the inner peripheral surface 12 a of the through hole 12 is larger than the wall thickness Tc (see FIG. 7) of the collar 14. Therefore, the bolt 13 inserted into the collar 14 is restrained in its radial position by the tip end of the projection 16, so that the projection 16 of the bolt fastening portion 10 connects the tip end of the projection 16 around the first axis RC 1. It functions in the same manner as a bolt hole having an inner peripheral surface, that is, a circular bolt hole represented by a two-dot chain line HL1 in FIG.

  6 and 7 are diagrams showing the collar 14 as a single unit, and FIG. 6 is a perspective view of the collar 14. 7 is a trihedral view showing the collar 14. FIG. 7A shows the collar 14 viewed in the direction of the first axis RC1, and FIG. 7B shows the collar 14 in FIG. It is the figure seen from the XA direction, (c) The figure is the figure which looked at the collar 14 in the arrow XB direction in (a) figure. The collar 14 is made of a metal such as iron and is a cylinder having a certain thickness Tc. The collar 14 is constrained in the radial direction by the inner peripheral surface 12a of the through-hole 12 in a state where the collar 14 is inserted into the through-hole 12 of the bolt fastening portion 10. The size is such that the clearance fits to 12. Further, the inner diameter of the collar 14 is sufficiently larger than the shaft diameter of the bolt 13 inserted inside the collar 14. Since the collar 14 reinforces the bolt fastening portion 10 against the fastening force of the bolt 13 in the direction of the first axis RC1, the first axis RC1 of the collar 14 is shown in FIG. The length in the direction is slightly longer than the bolt fastening portion 10.

  The collar 14 corresponds to the protrusion 16 of the bolt fastening portion 10 and has a plurality of pairs of cutouts 22a and 22b opened in the direction of the first axial center RC1 (referred to simply as cutouts 22 unless otherwise distinguished). It has. Specifically, two pairs of notches 22a and 22b are provided at one end 24 on the bolt front end side in the direction of the first axis RC1. The cutouts 22 a and 22 b are cut out so as not to interfere with the protrusion 16 of the bolt fastening portion 10 in a state where the collar 14 is inserted into the through hole 12 of the bolt fastening portion 10. Further, the depth of the notches 22a and 22b in the direction of the first axis RC1 is, for example, as shown in FIG. 2 in a state where the bottom surface 26 of the notches 22a and 22b and the inclined surface 20 of the protrusion 16 are in contact with each other. The center position of the collar 14 is determined so as to coincide with the center position of the through hole 12 of the bolt fastening portion 10 in the axial center RC1 direction. The notch 22a has a first notch width WA in the circumferential notch width (circumferential notch width) around the first axis RC1, and the notch 22b has a circumferential notch width larger than the first notch width WA. A wide second notch width WB. The first notch width WA can gently restrain the rotation of the collar 14 around the first axis RC1 with respect to the bolt fastening portion 10 by, for example, fitting the protrusion 16 into the notch 22a. It is established as follows.

  In addition, the collar 14 may not be provided with a notch at the other end 28 on the bolt base end side, but in this embodiment, the collar 14 has the same plurality of notches 22a and 22b formed at the one end 24. A pair of cutouts 22 c and 22 d are also formed in the other end portion 28. Specifically, the pair of notches 22c has the same shape as the pair of notches 22a, the pair of notches 22d has the same shape as the pair of notches 22b, and the notch 22c and the notch 22d are spaced apart from each other. It is the same as the mutual interval with 22b. Therefore, since the collar 14 has a symmetrical shape in the direction of the first axis RC1, it can be combined with the bolt fastening portion 10 with the one end 24 down and the other end 28 down in FIG. It is.

  According to the present embodiment, the bolt fastening portion 10 that constitutes a part of the resin member 8 and has the through hole 12 formed therein, and the metal cylindrical collar 14 that is inserted into the through hole 12 are Fastened to the mating component 15 by a bolt 13 inserted inside the collar 14. The bolt fastening portion 10 includes a plurality of pairs of protrusions 16 a and 16 b that protrude from the inner peripheral surface 12 a of the through hole 12 so as to face each other via the bolt 13, and the collar 14 has a protrusion 16 a of the bolt fastening portion 10. , 16b, and a plurality of pairs of cutouts 22a, 22b opened in the direction of the first axis RC1 and cut out. Therefore, since the bolt 13 can be restrained in the radial direction according to the protrusion amount Hpj (protrusion height Hpj) of the protrusion 16 from the inner peripheral surface 12a of the through hole 12, a bolt hole is formed as in Patent Document 2. It is possible to keep the outer shape in the radial direction of the bolt fastening portion 10 small compared to a resin part in which the cylindrical portion is provided inside the metal collar. If the outer shape in the radial direction of the bolt fastening portion 10 can be kept small as such, for example, the degree of freedom in design is improved. In addition, since the bolt 13 is basically constrained in the radial direction by a plurality of pairs of protrusions 16, dimension management of the bolt fastening portion 10 may be mainly performed by dimension management of the plurality of pairs of protrusions 16. Compared with the resin part in which the cylindrical part in which the bolt hole is formed as shown in 2 is provided inside the metal collar, the dimension can be easily managed. In addition, since there are a plurality of pairs (specifically, two pairs) of protrusions 16 that are opposed to each other via the bolts 13, compared to the case where the protrusions 16 are a pair, the protrusions 16 in the radial direction of the bolts 13 are arranged. It is easy to ensure good positioning of the bolt fastening portion 10, and by providing a slight margin between the bolt 13 and the protrusion 16 in the radial direction, it is possible to improve the insertability of the bolt 13. is there.

  Further, according to the present embodiment, the plurality of pairs of cutouts 22 have a cutout width 22a in which the cutout width in the circumferential direction of the collar 14 is the first cutout width WA, and the cutout width in the circumferential direction of the collar 14 is the first cutout width. And a notch 22b which is a second notch width WB wider than the notch width WA. Accordingly, a bolt fastening part 210 (provided with a protrusion 212a having a protrusion width in the circumferential direction corresponding to the first notch width WA and a protrusion 212b having a protrusion width in the circumferential direction corresponding to the second notch width WB. A common collar 14 can be used for both the bolt fastening portion 10 provided with only the protrusion 16 having the protrusion width in the circumferential direction corresponding to the first notch width WA. It is.

  Further, according to this embodiment, the protruding heights Hpj of the plurality of pairs of protrusions 16 from the inner peripheral surface 12 a of the through hole 12 are larger than the wall thickness Tc of the collar 14. Therefore, the radial position of the bolt 13 can be constrained by the tip positions of the plurality of pairs of protrusions 16.

  Further, according to the present embodiment, the plurality of pairs of notches 22a and 22b corresponding to the plurality of pairs of protrusions 16a and 16b are formed at one end portion 24 in the axial direction (first axial center RC1 direction) of the collar 14. A plurality of pairs of notches 22 c and 22 d that are the same as the plurality of pairs of notches 22 a and 22 b formed at one end 24 of the collar 14 are also formed at the other end 28 of the collar 14. Accordingly, since the collar 14 can be inserted into the through hole 12 of the bolt fastening portion 10 regardless of the axial direction of the collar 14, it is possible to prevent erroneous assembly and improve the assembly workability. It is possible.

  As mentioned above, although the Example of this invention was described in detail based on drawing, this invention is applied also in another aspect.

  For example, in the above-described embodiment, the cutouts 22a and 22c of the collar 14 have the first cutout width WA in the circumferential cutout width, and the cutouts 22b and 22d have the cutout width in the circumferential direction larger than the first cutout width WA. Although the second cutout width WB is wide, the cutouts 22a, 22b, 22c, and 22d may have the same circumferential cutout width. For example, the circumferential cutout width may be unified with the first cutout width WA.

  In the above-described embodiment, as shown in FIG. 3, the protrusion height Hpj of the protrusions 16 a and 16 b of the bolt fastening portion 10 is larger than the wall thickness Tc of the collar 14, but the protrusion height Hpj is It may be less than the wall thickness Tc. For example, FIG. 8 shows a diagram showing the bolt fastening portion 110 whose protruding height Hpj is equal to or less than the wall thickness Tc of the collar 14. FIG. 8 is a diagram showing the bolt fastening part 110 as a single unit, and is a plan view of the bolt fastening part 110 corresponding to FIG. FIG. 9 shows a state in which the bolt fastening portion 110 of FIG. 8 is combined with the collar 14. FIG. 9 shows a fastening structure in which the bolt fastening part 110 and the collar 14 are combined, and is a bottom view corresponding to FIG. The bolt fastening portion 110 includes two pairs of protrusions 112a and 112b. The protrusions 112a and 112b have protrusions 16a and 16b in FIG. 4 except that the protrusion height Hpj is equal to or less than the thickness Tc of the collar 14. Is the same. In the fastening structure in which the bolt fastening portion 110 and the collar 14 are combined, as shown in FIG. 9, the bolt 13 inserted into the collar 14 is restrained in the radial direction by the inner diameter of the collar 14. The inner peripheral surface of functions in the same manner as a circular bolt hole represented by a two-dot chain line HL2 in FIG. 9 having a larger diameter than a circle represented by the two-dot chain line HL1 in FIG. 3.

  In the above-described embodiment, as shown in FIG. 4, the protrusions 16a and 16b of the bolt fastening portion 10 have the same shape, but may have different shapes. For example, FIG. 10 shows a diagram illustrating a bolt fastening portion 210 in which a pair of protrusions 212a and another pair of protrusions 212b have different shapes. FIG. 10 is a diagram showing the bolt fastening part 210 as a single unit, and is a plan view of the bolt fastening part 210 corresponding to FIG. FIG. 11 shows a state in which the bolt fastening portion 210 in FIG. 10 is combined with the collar 14. FIG. 11 is a view showing a fastening structure in which the bolt fastening portion 210 and the collar 14 are combined, and is a bottom view corresponding to FIG. 3. The bolt fastening portion 210 includes a pair of protrusions 212a and a pair of protrusions 212b having different shapes from the protrusions 212a. The protrusion 212a is fitted into the notch 22a of the collar 14 in the same manner as the protrusion 16a. The protrusion 212a is the same as the protrusion 16a except for the protrusion height Hpj. Specifically, the protrusion height Hpj of the protrusion 212a is smaller than the protrusion 16a and larger than the thickness Tc of the collar 14. Further, the projection 212b of the bolt fastening portion 210 is fitted into the notch 22b of the collar 14 similarly to the projection 16b. The protrusion 212b is the same as the protrusion 16b except for the protrusion width in the circumferential direction around the first axis RC1. Specifically, the protrusion width of the protrusion 212b is a size corresponding to the second notch width WB, for example, such that the protrusion 212b can be fitted into the notch 22b with a gap fit. In the fastening structure in which the bolt fastening portion 210 and the collar 14 are combined, as shown in FIG. 11, the bolt 13 inserted into the collar 14 is restrained in the radial direction by the respective tips of the protrusions 212a and 212b. Therefore, the protrusions 212a and 212b of the bolt fastening portion 210 are bolt holes having an inner peripheral surface in which the tips of the protrusions 212a and 212b are connected around the first axis RC1, that is, a length represented by a two-dot chain line HL3 in FIG. Functions like a circular bolt hole. As can be seen by comparing FIGS. 3, 9, and 11, the shape and size of the protrusions 16, 112, and 212 can be appropriately changed without changing the outer shape of the bolt fastening portions 10, 110, and 210. While using the collar 14, it is possible to reproduce bolt holes of different shapes or sizes, such as circular or oval.

  In the above-described embodiment, the bolt fastening portion 10 includes the protrusion 16 at the one end portion 18, but the protrusion 16 may be disposed at a location other than the one end portion 18, for example, the other end portion 28. Absent. Further, the plurality of pairs of protrusions 16 may be arranged at positions shifted from each other in the direction of the first axis RC1.

  In FIG. 4 of the above-described embodiment, two pairs of protrusions 16 are provided, but three or more pairs may be provided. The same applies to the number of notches 22.

  In the above-described embodiment, the bolt fastening portion 10 and the collar 14 have a cylindrical shape, but shapes other than the cylindrical shape are also conceivable.

  Further, in the above-described embodiment, the cross-sectional shape perpendicular to the first axis RC1 of the collar 14 is a closed annular shape, but the collar 14 may be cylindrical, for example, the cross-sectional shape of the collar 14 is An annular shape that is locally open at one place, that is, a C shape may be used.

  The above description is only an embodiment, and the present invention can be implemented in variously modified and improved forms based on the knowledge of those skilled in the art.

10, 110, 210: bolt fastening portion 12: through hole 12a: inner peripheral surface 13: bolt 14: collar 15: mating part 16a, 16b, 112a, 112b, 212a, 212b: protrusion 18: one end 22a of the bolt fastening portion , 22b, 22c, 22d: Notch 24: One end of the collar

Claims (2)

A bolt fastening portion that is a part of a resin member and has a through hole formed therein, and a metal cylindrical collar inserted into the through hole are fastened to a mating part by a bolt inserted inside the collar. A fastening structure,
The bolt fastening portion includes a plurality of pairs of protrusions protruding from the inner peripheral surface of the through hole so as to face each other via the bolt,
The collar includes a plurality of pairs of cutouts corresponding to the projections of the bolt fastening portion and cut open in the axial direction .
The plurality of pairs of notches have a notch in which the circumferential notch width of the collar is a first notch width, and a second notch width in which the circumferential notch width of the collar is wider than the first notch width. Including a notch,
The vehicle member fastening structure according to claim 1, wherein the plurality of pairs of protrusions has a protruding height from an inner peripheral surface of the through hole larger than a thickness of the collar . The plurality of pairs of notches corresponding to the plurality of pairs of protrusions are formed at one end in the axial direction of the collar,
Fastening structure for a vehicle component according to claim 1 in which the notch of the same pairs and notch pairs formed at one end of said collar, characterized in that it also formed at the other end portion of the collar .

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