JP2527871Y2 - Mounting bracket for resin molded products - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting bracket for bolting a resin molded product such as an electric wire connection box.

[0002]

2. Description of the Related Art When an electric wire connection box is attached to an appropriate place such as in an engine room of an automobile, generally, as shown in FIGS. A mounting bracket 2 is formed, and the mounting bracket 2
A bolt 5 protruding from a mounting surface 4 to be mounted as a mounting target portion is inserted into the bolt insertion hole 3, and is fastened and fixed with a nut 6. In this case, the resin-made bracket 2 is easily damaged by tightening the nut 6, so as to prevent this, as shown in FIGS. 10 (a) and 10 (b), the height of the bracket 2 corresponds to the thickness H of the tightening portion. A metal collar 7 is press-fitted.

[0003] An electric wire connection box 11 shown schematically in FIG.
In the same manner, the mounting bracket 12 is formed at the end of the electric wire connection box 11, and the bolt 15 protruding from the mounting surface 14 to be mounted is inserted into the bolt insertion hole 13 of the mounting bracket 12. Then, the nut 16 is fastened and fixed. Also in this case, as shown in FIG. 14, a metal collar 17 having a height corresponding to the thickness H of the fastening portion is pressed into the inner periphery of the bolt insertion hole 13.

[0004] These known examples are disclosed in Japanese Utility Model Laid-Open Publication No.
It is similar to that described in Japanese Patent Publication No.

[0005]

By the way, the mounting surface of the electric wire connection boxes 1 and 11 is not limited to a flat surface but may be a curved surface or an inclined surface. Especially in the case of the curved surface, the lower surface of the mounting bracket 2 shown in example X _a in FIG. 9, may cause a gap d between the mounting object seat surface 4 as shown in FIG. 11, when forcibly nut screwed In the other mounting bracket 2 indicated by _Xb in FIG. 9, the collar 7 is twisted in the direction A as shown in FIG. 12, and excessive initial stress is generated in the mounting bracket 2. In some cases, the formed mounting bracket 2 may be easily broken and difficult to fix.

Further, as shown in FIG. 15, one mounting surface 14a may be inclined with respect to the other mounting surface 14b, and the bolt 15 may be inclined accordingly. In such a case, for example, when the nut 16 on the seat surface 14b side is fastened first and then tightened with the nut 16 on the inclined seat surface 14a side, the collar 17 follows the inclination of the seat surface 14, and the same as above. In this case, an excessive force is applied to the bolt insertion holes 13 of the resin-molded bracket 12, and as shown in FIG. 16, the weak portion of the bracket 12 may be damaged, and fixing may be difficult.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a mounting bracket which can be fixed to a curved or inclined seating surface and is not easily damaged.

[0008]

Means for Solving the Problems To solve the above-mentioned problems, a first aspect of the present invention is to form a bolt insertion hole in a bracket body integrally formed with a resin molded product and fit a collar into the bolt insertion hole. Then, in the mounting bracket of the resin molded product to be bolted and fastened to the mounting target part,
Characterized in that the formation of the ring-shaped recess over the outer entire area of peripheral wall of the bolt insertion hole.

Further, the invention according to claim 2 is to form a bolt insertion hole in a bracket body integrally formed with a resin molded product, insert a collar into the bolt insertion hole, insert a bolt, and insert the bolt into the mounting target portion. In the mounting bracket of the resin molded product to be fastened, the bolt insertion hole has a size that allows the collar to be loosely fitted, and a convex portion that protrudes inward to an axial middle portion and supports the collar so as to be tiltable in the axial swing direction. It is characterized by having been formed.

Further, according to the invention of claim 3, a bolt insertion hole is formed in a bracket body integrally formed with a resin molded product, a collar is inserted into the bolt insertion hole, and a bolt is inserted into the mounting target portion. In a mounting bracket of a resin molded product to be fastened, the bolt insertion hole has a size that allows the collar to be loosely fitted, and one end of the collar is supported by a support member fixed to the bracket body.

[0011]

When the mounting bracket of the present invention is fastened and fixed to a curved or inclined seating surface with a nut, the collar follows the curved surface or the inclination of the seating surface and is inclined relative to the bracket body. At that time, the fitting of the bracket body and the collar has a structure that allows the movement of the collar,
Unreasonable stress is not generated in the bracket body, or even if it is generated, it becomes small.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

First, referring to FIGS. 1 and 2, a first embodiment of the present invention will be described.
An embodiment will be described. The mounting bracket 21 includes a rectangular bracket body 22 formed of resin, and a metal collar 24 that is press-fitted into the inner periphery of a bolt insertion hole 23 of the bracket body 22.

As shown in FIG. 1B, the bolt insertion hole 2
An annular concave portion 26 is formed on the outside of the third peripheral wall 25 so that the peripheral wall 25 is an independent cylindrical body. Therefore, the peripheral wall 25 is configured to be flexible with the base end as a fulcrum. In this embodiment, FIG.
The slits 27 are provided on the peripheral wall 25 at equal intervals in the circumferential direction, so that the peripheral wall 25 bends more effectively.

Outside the peripheral wall 25, radial ribs 28a and 28b are provided. These ribs 28a, 2
Although 8b is separated from the peripheral wall 25, each inner end is close to the peripheral wall 25 at a predetermined interval. And
The ribs 28a and 28b serve as stoppers for restricting the bending of the peripheral wall 25.

When the mounting bracket 21 is in a state similar to that shown in FIG. 12, the collar 24 follows the curvature of the seating surface 4 within the range of the concave portion 26 and is relatively inclined with respect to the bracket body 22. Therefore, no unreasonable initial stress is generated in the bracket main body 22, and even if the bracket 6 is tightened with the nut 6, there is no possibility of damage, and the mounting bracket 21 can be securely fixed to the mounting surface 4. Moreover, in this embodiment,
Since the slit 27 is provided in the peripheral wall 25, the peripheral wall 25 has a flexible structure, and the generation of stress is further reduced.

In this embodiment, a plurality of slits 27 are formed in the peripheral wall 25 to make the peripheral wall 25 easily bendable. However, the slit is omitted as in the mounting bracket 21 'of the second embodiment shown in FIG. May be.

Next, a third embodiment of the present invention will be described.

FIGS. 4 and 5 show a mounting bracket 31 according to a third embodiment.

The mounting bracket 31 comprises a bracket main body 32 formed of resin, and a metal collar 34 fitted on the inner periphery of the bolt insertion hole 33 of the bracket main body 32. In this case, an inwardly projecting convex section 33a having a mountain-shaped cross section is formed annularly along the inner peripheral wall at the axial center of the inner peripheral wall of the bolt insertion hole 33, and the collar 34 is formed by the convex section 33a. It is supported so as to be tiltable in the shaft runout direction. Therefore, the bolt insertion hole 33 has a size that allows the collar 34 to be loosely fitted, and a convex portion that protrudes inward in the axial middle portion and supports the collar 34 so as to be tiltable in the axial swing direction is formed.

At the opening edges of the bolt insertion holes 33 on the front and back surfaces of the bracket body 32, small hemispherical or conical small projections 3 are formed.
4 are equally arranged on the same circumference, and flanges 34 a and 34 b provided above and below the collar 34 are in contact with the tips of the small projections 35. In this case, the diameter of the flanges 34a, 34b is set to be larger than the dimension S between the opposed small projections 35 so that the flanges 34a, 34b abut on the small projections 35 reliably. And the collar portions 34a, 34b of the collar 34
Abuts on the small protrusion 35, so that the collar 34 is supported so as not to tilt in the normal state. In addition,
The collar 34 is provided in such a manner that only one flange 34b is provided and penetrates through the bolt insertion hole 33, and the tip is crimped to provide the other flange 34a.

When the mounting bracket 31 is fastened and fixed to the inclined seat surface 14 with the nut 16 as shown in FIG. 5, the collar 34 crushes the small projection 35 with its flange portions 34a and 34b, and Follow the inclination and lean. On this occasion,
Since the collar 34 is tiltably supported in the bolt insertion hole 33, no excessive force is applied to the bracket main body 32 side, and the collar 34 is not damaged even when fastened with the nut 16.

Next, a fourth embodiment of the present invention will be described.

FIGS. 6 to 8 show the structure of the mounting bracket 41 of the fourth embodiment.

The mounting bracket 41 includes a bracket main body 42 made of resin, a metal collar 44 inserted into the inner periphery of the bolt insertion hole 43 of the bracket main body 42, and a support member as a support member for supporting the collar 44. And a plate 45. In this case, the bolt insertion hole 43 is formed so as to loosely fit larger than the outer diameter of the collar 44, and between the inner periphery of the bolt insertion hole 43 and the outer periphery of the collar 44,
A space 46 that allows the collar 44 to tilt is secured.

The collar 44 is formed integrally with the support plate 45 and stands upright on the inner bottom surface of the support plate 45. Support plate 45
Is bent as shown in FIG.
2 and hold the lower surface and both sides in the width direction of the periphery of the bolt insertion hole 43 in that state. In this case, notches 47, 47 are formed at both ends of the upper surface of the bracket body 42, and the upper end of the collar 44 is engaged with the notches 47. As a result, the collar 44 is held at a fixed position so as not to shift.

When the mounting bracket 41 is fastened and fixed to the inclined seat surface 14 with the nut 16 as shown in FIG. 8A, the mounting bracket 41 is fixed to the support plate 45 and the bracket body 42 following the inclined seat surface 14. Is done.

If the bolt 15 is tilted, the nut 1
When 6 is fastened, the collar 44 freely tilts with respect to the support plate 45 within the space 46 regardless of the bracket body 42. Therefore, no excessive force is applied to the bracket body 42 side, and the bracket body 42 is not damaged even when fastened with a nut.

[0029]

As described above, according to the mounting bracket of the present invention, since the collar is supported by the bracket body so as to be tiltable, even when the collar is inclined with respect to the bracket body, the mounting bracket is attached to the bracket body. Unreasonable power does not work. Therefore, the risk of damage to the bracket body is reduced, and the bracket body can be securely fixed to a curved or inclined seat surface.

[Brief description of the drawings]

FIGS. 1A and 1B are main configuration diagrams of a mounting bracket 21 according to a first embodiment of the present invention, wherein FIG. 1A is a plan view and FIG. 1B is a cross-sectional view taken along the line Ib-Ib in FIG.

FIG. 2 is a cross-sectional view showing a state in which the mounting bracket 21 of the first embodiment of the present invention is tightened with a nut.

FIGS. 3A and 3B are main part configuration diagrams of a mounting bracket 21 'according to a second embodiment of the present invention, wherein FIG. 3A is a plan view and FIG. 3B is a cross-sectional view taken along the line IIIb-IIIb of FIG.

FIGS. 4A and 4B are main part configuration diagrams of a mounting bracket 31 according to a third embodiment of the present invention, wherein FIG. 4A is an exploded perspective view and FIG.
FIG. 4 is a sectional view taken along arrow IVb-IVb in an assembled state.

FIG. 5 is a sectional view showing a state in which the mounting bracket 31 according to the third embodiment of the present invention is tightened with a nut.

FIG. 6 is an exploded perspective view of a mounting bracket 41 according to a fourth embodiment of the present invention.

FIG. 7 is a perspective view of a mounting bracket 41 according to a fourth embodiment of the present invention.

FIG. 8 is a cross-sectional view showing a state in which the mounting bracket 41 of the fourth embodiment of the present invention is tightened with a nut, wherein (a) shows the case where the bolt 16 is not inclined with respect to the seat surface 14 and (b) shows the same inclination. FIG.

FIG. 9 is a plan view of a conventional resin molded product.

[Figure 10] is a diagram showing a conventional mounting bracket 2 configuration, (a) shows the X _a, enlarged view of the X _b portion in FIG. 9, (b) is its side cross-sectional view.

FIG. 11 is a cross-sectional view for explaining a problem of a conventional mounting structure for a resin molded product.

FIG. 12 is a cross-sectional view for explaining a problem of a conventional mounting structure for a resin molded product.

FIG. 13 is an explanatory view of a mounting structure of another conventional resin molded product.

14 is a sectional view taken along the line XIV-XIV in FIG.

FIG. 15 is an explanatory view of a problem of a mounting bracket of another conventional resin molded product.

FIG. 16 is an explanatory view of a problem of a mounting bracket of another conventional resin molded product.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric wire connection box (resin molded product) 4 Mounting surface (mounting part) 5 Bolt 6 nut 14 Mounting surface (mounting part) 15 Bolt 16 Nut 21 Mounting bracket 21 'Mounting bracket 22 Bracket body 23 Bolt insertion Hole 24 Collar 25 Perimeter wall 31 Mounting bracket 32 Bracket body 33 Bolt insertion hole 34 Collar 41 Mounting bracket 42 Bracket body 43 Bolt insertion hole 44 Collar 45 Support plate

Claims (3)

(57) [Scope of request for utility model registration] 1. A mounting method for a resin molded product, wherein a bolt insertion hole is formed in a bracket body integrally formed with the resin molded product, a collar is inserted into the bolt insertion hole, a bolt is inserted, and the bolt is inserted into a mounting target portion. in brackets, the mounting bracket of the resin molded article, characterized in that the formation of the ring-shaped recess over the outer entire area of peripheral wall of the bolt insertion hole. 2. A mounting method for a resin molded product, wherein a bolt insertion hole is formed in a bracket body integrally formed with the resin molded product, a collar is inserted into the bolt insertion hole, a bolt is inserted, and the bolt is inserted into a mounting target portion. In the bracket, the bolt insertion hole has a size that allows the collar to loosely fit,
A mounting bracket for a resin molded product, wherein a convex portion is formed at an intermediate portion in the axial direction so as to protrude inward and support the collar so as to be tiltable in the axial runout direction. 3. A mounting of a resin molded product in which a bolt insertion hole is formed in a bracket body integrally formed with the resin molded product, a collar is inserted into the bolt insertion hole, a bolt is inserted, and the bolt is inserted into a mounting target portion. A mounting bracket for a resin molded product, wherein the bolt insertion hole has a size that allows the collar to be loosely fitted in the bracket, and one end of the collar is supported by a support member fixed to the bracket body.