JP2001041210A - Fastening structure of hollow resin component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple mounting structure that does not cause loosing of a bolt, by forming a hole penetrating through front and rear walls in a fastening portion of a hollow resin component, and embedding and fixing, in the hole-side wall, an edge of a fastening member thinner than the thickness of the component. SOLUTION: Recessed portions 13 is formed in component mounting places of hollow resin components 11 according to the thickness and the shape of a fastening member 12 from both surfaces or one surface, holes 14 are provided in their substantial centers, front and rear walls of the hollow resin components 11 are interconnected, and an edge of a member 12 is embedded in and fixed to the side wall of each hole 14. The thickness (t) of the member 12 is set thinner than the thickness T of the component 11 to allow embedding. The member 12 has a mounting hole 16, has a circular plate shape or a notch in the periphery, projections are alternately bent back and forth to strengthen an adhering force of an embedding portion, and the member is made of a metal plate or a hard plastic. This allows fixing it with bolts from both sides of a fastening member, mounting of components in a larger range, and strong fastening, and reduces a manufacturing cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention belongs to the technical field of a fastening structure for a hollow resin part.

[0002]

2. Description of the Related Art In recent years, hollow resin parts have been used in structural materials and other fields for the purpose of weight reduction and material saving. Hollow resin parts are formed by hollowing out the resin material by rotational molding or blow molding, etc., and are lighter and cheaper than iron and steel materials, and are easy to manufacture. Since the strength is inferior to steel and steel materials, there is a problem in the mounting method when mounting other components or the like to the hollow resin component.

FIG. 10 shows a conventional mounting structure (hereinafter referred to as conventional mounting structure 1). An insert nut 52 is buried by integral molding in a wall to which other components of the hollow resin component 51 are attached. FIG. 7B is a view showing details of the insert nut 52, and a female screw 5 is provided inside the insert nut 52.
2a is cut off. FIG. 7A shows an example in which an L-shaped angle 53 is attached. The L-shaped angle 53 is fixed to an insert nut 52 by a bolt 54.

Conventional mounting structure 1 using an insert nut
In the case where a closed space is constituted by a plurality of parts,
6 attaches the lid 55 as shown in FIG.
For example, there is a problem that the mounting becomes impossible or difficult when it is desired to form a dark box by mounting the mounting unit 7. FIG. (B) is a cross-sectional view of the lid 55 viewed from the arrow AA. That is, the lid 5
5 can be attached in the direction of arrow B when the wall surface 55a of
The box cannot be formed because the bolt cannot be attached from the direction.

A conventional mounting structure 2 is used as a mounting structure that solves the problems of the conventional mounting structure 1. FIG.
(A) shows the configuration of the conventional mounting structure 2. Hollow resin parts 5
1 has a structure in which a metal pipe 62 as shown in FIG. 1B is fixed by integral molding so as to be in close contact with the side wall of a hole provided in the hollow resin component 61. The height of the pipe 62 is equal to or greater than the thickness of the hollow resin component. When attaching the L-shaped angle 63 to the conventional structure 2, use bolts
It is fixed with nuts 64 and 65.

In the conventional structure 2, since the outer periphery of the pipe 62 is only in close contact with the side wall of the hole of the hollow resin component 61, the adhesion is weak, and the pipe 62 may be detached by an external force such as vibration. . Further, when the bolt is fastened, a torque acts on the pipe 62, and there is a possibility that the pipe 62 will be disengaged by the torque. A conventional structure in which a fastening member 67 provided with a flange (or a return portion) 67b at the center of a fastening member main body 67a in order to increase the adhesion force is embedded in the side wall of the hole of the hollow resin component 61 (hereinafter, the conventional structure 3). There is). Although the conventional structure 3 has a strong adhesion, there is a problem in that the provision of the return portion 67b increases the work such as welding or cutting, thereby increasing the cost.

[0007]

As described above, the conventional structure 1 has a problem that when a closed space is formed by a plurality of components, the mounting becomes impossible or difficult. Further, in the conventional structure 2, the adhesion is weak, and the fastening member may be detached due to vibration or the like. Further, in the conventional structure 3, extra work such as welding is increased due to the provision of the return portion, which increases the cost. There's a problem. The present invention has been made under the above-described background, and provides a mounting structure of a hollow resin component that has a simple structure of a bolt fastening portion, can be fastened regardless of a fastening direction, and does not cause bolt loosening or the like. It is intended to be.

[0008]

The present invention employs the following means to solve the above-mentioned problems. That is, claim 1
In the invention described, a hole penetrating the front and back walls is formed in a fastening portion of the hollow resin component, and an edge portion of a fastening member thinner than the thickness of the hollow resin component is embedded in the side wall of the through hole and fixed. It is characterized by:

According to a second aspect of the present invention, in the first aspect of the present invention, the fastening member is made of a metal plate.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the edge of the fastening member is embedded by providing a groove in the side wall, and inserting the edge into the groove. Alternatively, it is characterized by being formed integrally with the hollow resin component.

According to a fourth aspect of the present invention, in the first to third aspects of the present invention, a return is provided at an edge of the fastening member.

According to a fifth aspect of the present invention, in the first to fourth aspects of the present invention, a hole is provided in the fastening member to reduce the heat capacity transmitted to the member during molding. And

According to a sixth aspect of the present invention, in the first to fifth aspects of the present invention, a ring-shaped oilless bush is fixed to a fastening hole of the fastening member.

[0014]

FIG. 1 shows an embodiment of the present invention. Hereinafter, embodiments of the present invention will be described with reference to the drawings. (A) is a sectional view as seen from the arrow XX, and (B) is a plan view. A concave portion 13 is formed at the component mounting location of the hollow resin component 11 from both surfaces or one surface according to the thickness and shape of the fastening member 12, and a hole 14 is provided at substantially the center of the concave portion 13, and the hollow resin component 11 is provided. The front and back walls are connected. Hole 1
The edge of the fastening member 12 is embedded and fixed in the side wall (or the vertical wall) 4.

Here, the thickness t of the fastening member 12 is made smaller than the thickness T (distance between the front and back surfaces) of the hollow resin component 11 to enable the embedding. The fastening member 12 has a mounting hole 16 and an embodiment of the shape is shown in FIG. FIG. 2A shows the fastening member 12a.
Is an example in which the shape of the disk is a disk shape, and FIG.
FIG. 9C shows an example in which a notch 17 is provided in the peripheral portion of the b, and a V-shaped notch 18 is provided in the peripheral portion of the fastening member 12c, and the protrusions 19 are alternately bent back and forth to bond the adhesive force of the embedded portion. This is an example in which is strengthened. FIG. (D) shows an example in which the fastening member 12d is formed in an octagonal plate shape. The fastening member 12 is preferably made of a metal plate and is preferably formed integrally. However, a groove may be provided in the side wall of the hole 14 and the edge of the fastening member may be inserted and fixed. Further, the fastening member 12 may be made of a hard plastic or the like.

FIG. 3 shows an embodiment in which a return portion 21 is provided at an edge of a fastening member 20 made of a plate-like member. (A) is a sectional view in a state where the fastening member 20 is fixed to the hollow resin component 11, and (B) is a perspective view of the fastening member 20. Return part 2
1 provides the return portion 2 even when a large torque acts on the fastening member 20 at the time of bolt fastening or the like.
Due to the presence of 1, the adhesive surface between the fastening member 20 and the hollow resin component 11 can be prevented from being peeled off, rotated, and damaged.

FIG. 4 shows an embodiment in which a hole 23 is provided in addition to the mounting hole 16 in a fastening member 24 made of a plate-like member. By providing the holes 23, the amount of heat transferred to the fastening member 24 during molding is reduced, and a decrease in the temperature of the contact portion is suppressed, so that the adhesiveness between the hollow resin component 11 and the fastening member is improved.

FIGS. 5 to 8 show an embodiment in which various parts are mounted. FIG. 5 shows an example in which another component 31 is fixed to the hollow resin component 11. The part 31 is made of metal and has a female threaded pipe 31a fixed inside. Fastening member 32
Consists of a metal plate with round holes for mounting.
In this case, the bolts 34 are firmly fixed using the washers 33 to prevent loosening after fastening.

FIG. 6 shows an example in which a switch 35 is attached to the hollow resin part 11. The switch 35 is fixed to a fastening member 37 by an externally threaded cylindrical body 35 a and a nut 36. Since the length of the tubular body 35 is short, the fastening member 37 must be formed of a plate, and its thickness must be smaller than the thickness of the hollow resin component 11 (see FIG. 1). This is a point which could not be fixed with the conventional structure (see FIGS. 11 and 12), but was made possible by the present invention.

FIG. 7 shows an example in which a shaft 39 is fixed to the hollow resin part 11. The fastening member 41 is made of a metal plate, and fixes the oilless bush 40 with a tie-fit. In order to perform the tie-fit, processing accuracy of the mounting hole 41a of the plate 41 is required, but it can be easily processed by mechanical processing.

FIG. 8 shows a cylinder key 42 attached to the hollow resin part 11.
This is an example of attaching. The key body 42a is fastened and fixed to a fastening member 43 made of a metal plate by a nut 45 via a spring washer 44.

FIG. 9 shows an example in which the lid 11 made of a hollow resin component is fixed to the box main body 46. FIG. 9A is an overall view, and FIG. 9B is a cross-sectional view showing details of the mounting portion. An attachment angle 47 is fixed inside the box main body, and a female screw is cut at a tip of the angle. A fastening member 49 is fixed to the angle 47 by a bolt 48.

In this embodiment, as described above, a through hole is provided in the fastening portion of the hollow resin component, and the edge of the thin fastening member (metal plate) is embedded and fixed on the side wall of the through hole. As a result, the configuration is such that the fastening member can be fixed from both sides by bolts or the like. Therefore, it can be attached even when a closed space is configured. Further, since the fastening member is formed of a plate, it is possible to mount a switch or a cylinder key or the like having a short mounting portion. Further, by making the plate made of metal, the plate can be firmly fastened.
Further, the fastening member provided with a return at the end can be attached even when a large moment acts upon the attachment. In addition, since the fastening member is formed of a plate, there is an effect that manufacturing is easy and manufacturing cost can be reduced.

The embodiments and examples of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to the examples, and changes in design and the like may be made without departing from the gist of the present invention. Even if there is, it is included in the present invention. For example, the fastening member is not limited to a plate. For example, the center may be thick and the edge may be thin. Also,
The fastening member is not limited to metal.

[0025]

As described above, according to the structure of the present invention, a through hole is provided in a fastening portion of a hollow resin component, and an edge portion of a thin fastening member is embedded in a side wall of the through hole. Since it is fixed, it is configured to be fixable from both sides of the fastening member with bolts or the like. Accordingly, an effect that a wider range of parts can be attached can be obtained. According to the second aspect, since the fastening member is formed of a metal plate, it is possible to perform firm fastening and to reduce the manufacturing cost. According to the fourth aspect, the effect is obtained that the fastening can be performed even when a large moment acts upon the fastening.

[Brief description of the drawings]

1A and 1B show a structure according to an embodiment of the present invention.

FIGS. 2A to 2D show examples of a fastening member used in the embodiment of the present invention.

FIGS. 3A and 3B show a case where the fastening member is turned back in the present embodiment.

FIG. 4 shows an example in which holes are provided in the fastening member to improve the adhesiveness in the present embodiment.

FIG. 5 shows an embodiment in which other parts are fastened.

FIG. 6 shows an embodiment with a switch attached.

FIG. 7 shows an embodiment in which the shaft is fastened.

FIG. 8 shows an embodiment in which a cylinder key is attached.

FIG. 9A shows an embodiment in which a dark box is formed.
(B) shows details.

FIGS. 10A and 10B show a conventional structure using an insert nut.

FIGS. 11A and 11B show a conventional structure for forming a dark box.

12A and 12B show a conventional structure using a pipe.

13A and 13B show a conventional structure in which a flange is provided on a pipe.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Hollow resin part 12 Fastening member (fastening member) 14 Hole (through-hole) 16 Mounting hole 21 Return part

Claims (6)

[Claims] A hole penetrating the front and back walls is formed in a fastening portion of a hollow resin component, and an edge portion of a fastening member thinner than the thickness of the hollow resin component is embedded and fixed in a side wall of the through hole. A fastening structure for hollow resin parts, characterized in that: 2. The fastening structure for a hollow resin component according to claim 1, wherein the fastening member is made of a metal plate. 3. The embedding of an edge of the fastening member is performed by forming a groove in the side wall, inserting the edge into the groove, or integrally forming with the hollow resin component. The fastening structure for a hollow resin component according to claim 1 or claim 2. 4. The fastening structure for a hollow resin component according to claim 1, wherein a return is provided at an edge of the fastening member. 5. The hollow resin component according to claim 1, wherein a hole is provided in the fastening member to reduce a heat capacity transmitted to the member during molding. Fastening structure. 6. A ring-shaped oilless bush is fixed to a fastening hole of the fastening member.
A fastening structure for a hollow resin component according to claim 5.