JP3028398U - Parts fixed to plastic material members by insert molding - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To attach a plastic material member by insert molding to a substrate made of synthetic resin so as to prevent the member from rotating and coming off.
In particular, the embedded base is easily molded by non-cutting to improve productivity and reduce manufacturing cost. SOLUTION: A synthetic resin substrate 5 is formed by insert molding.
The metal fitting part 1 fixed to is composed of a protrusion 2 and a mounting base 3 which is formed in a flange shape on a part of the protrusion in the axial direction and is embedded in a synthetic resin substrate 5. The mounting base is two polygonal flanges 31, 3
The two are integrally formed by overlapping, and the corner portion of one flange portion is located substantially at the center of the side portion of the other flange portion. Since the outer peripheral surfaces of both flanges embedded in the synthetic resin substrate by insert molding are surrounded by the synthetic resin, the mounting base, that is, the metal fitting part, is constrained by the outer peripheral surfaces of both flanges in the rotational direction, and the axial direction Are constrained by the corners that are displaced and protrude from each other, and are fixed to the substrate made of synthetic resin.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a plastic material member, such as a metal fitting part, which is embedded and fixed in a synthetic resin substrate by insert molding in a rotation prevention / removal prevention state.

[0002]

[Prior art]

 In the prior art, a metal material component such as a stud, which is embedded and fixed in a plastic material member, for example, a synthetic resin substrate by insert molding in a rotation prevention / removal prevention state, is as shown in FIGS. 3 and 4. It is structured. In FIGS. 3 and 4, a metal fitting component 1 embedded and fixed in a synthetic resin substrate 5 is formed in a flange shape at the base of a tubular male screw portion 2 having a thread formed on the outer peripheral surface and a male pipe male screw portion 2. And a mounting base 3.

The mounting base 3 has a hexagonal shape having the same thickness as that of the synthetic resin substrate 5 to which the metal fitting part 1 is fixed, and the thickness thereof is roughly divided into three parts, and the circumferential groove 33 is formed in the central thickness part. , Hexagonal flange portions 34, 34 are formed in parallel on both sides. Since the circumferential groove 33 is processed by turning, for example, the groove bottom surface 33a is a cylindrical surface. In the metal fitting part 1, a synthetic resin substrate 5 is insert-molded on the mounting base 3.

As a result, both sides of the mounting base 3, that is, the outer side surfaces of the hexagonal flange portions 34, 34 are exposed in the same plane with respect to both sides of the substrate 5, and the hexagonal outer circumferences of the hexagonal flange portions 34, 34 are exposed. The surface is surrounded by a synthetic resin, and the peripheral groove 33 is filled with the synthetic resin so that the substrate 5 bites into the peripheral groove 33. Therefore, the mounting base 3, that is, the metal fitting component 1, is restrained by the outer peripheral surface of the hexagonal flange portions 34, 34 in the rotation direction and by the circumferential groove 33 in the axial direction, that is, in the rotation stop / prevention state. Then, it is fixed to the substrate 5 made of synthetic resin.

[0005]

[Problems to be solved by the device]

 The metal fitting component 1 which is fixed in the rotation preventing / preventing state in the above-mentioned conventional technique needs to be individually turned to form the peripheral groove 33 for preventing retaining, and therefore the productivity is also improved. It is bad and the manufacturing cost is high.

[0006]

[Means for Solving the Problems]

 The part fixed to the plastic material member by insert molding according to the present invention has a flange-shaped mounting base part formed by integrally forming two polygonal or non-circular flange parts with their phases shifted in the rotational direction. It is preferable that the thickness of the attachment base provided in part in the direction is substantially equal to the thickness of the plastic material member.

[0007]

[Embodiment of device]

 A metal fitting part 1 fixed to a synthetic resin substrate 5 by insert molding according to the present invention will be described with reference to FIGS. FIG. 1 shows an AA arrow view of FIG. 1 and 2, a metal fitting component 1 embedded and fixed in a synthetic resin substrate 5 has a tubular male screw portion 2 having a thread formed on the outer peripheral surface thereof, and a flange-like member formed on the base portion of the tubular male screw portion 2. And a mounting base 3. The position of the mounting base portion 3 is not limited to the base portion of the tubular male screw portion 2, but may be the middle portion of the tubular male screw portion 2 as required. A female screw 21 is engraved on the inner peripheral surface of the tubular male screw portion 2 on the base side in a range approximately corresponding to the thickness of the mounting base 3.

The tubular male screw portion 2 of the metal fitting part 1 in the illustrated example is merely an example, and may have another shape, for example, a tubular female screw portion, an ordinary bolt, a hook portion, or the like. The mounting base 3 is formed by stacking two polygonal, for example, regular hexagonal flange portions 31, 32 as shown in the figure so that a flange having the same thickness as the synthetic resin substrate 5 to which the metal fitting component 1 is fixed is formed. It is formed integrally.

The flange portion 31 and the flange portion 32 are arranged such that the corner portion of one flange portion 31 is located substantially at the center of the side portion of the other flange portion 32. That is, when the flange portions 31 and 32 are regular hexagons, they are out of phase by 30 degrees, when they are square, they are out of phase by 45 degrees, and when they are equilateral triangles, they are out of phase by 60 degrees. ing.

In the fitting component 1, a synthetic resin substrate 5 is insert-molded on the mounting base 3. As a result, both surfaces of the mounting base 3, that is, the outer side surfaces of the hexagonal flange portions 31 and 32 are exposed in the same plane with respect to both surfaces of the substrate 5, and the hexagonal outer peripheral surfaces of the hexagonal flange portions 31 and 32 are respectively exposed. Surrounded by synthetic resin.

Therefore, the mounting base portion 3, that is, the metal fitting component 1, is constrained in the rotational direction by the hexagonal outer peripheral surfaces of the respective flange portions 31 and 32, and is axially positioned rearward in the displacement direction. It is constrained by the inner surface of the corner of the flange portion, that is, it is fixed to the synthetic resin substrate 5 in a rotation prevention / prevention state. In the illustrated example, the mounting base portion 3 and the synthetic resin substrate 5 have the same thickness, but if the boundary surface between the hexagonal flange portions 31 and 32 is buried in the substrate 5, the thickness relationship may be appropriate. .

The mounting base 3 has a shape in which two polygonal flange portions 31 and 32 are simply overlapped with each other with their phases shifted, and there is no recessed groove portion. It can be easily molded by non-cutting processing. Although the flange portions 31 and 32 are polygonal (regular hexagonal) in the illustrated example, it can be easily understood that they may be non-circular.

[0013]

[Effect of device]

 The part fixed to the plastic material member by insert molding according to the present invention is such that the mounting base has a shape in which two polygonal or non-circular flange portions are overlapped with their phases shifted and integrated, and the concave groove portion is formed. Since it is not present, the part can be easily formed by ordinary non-cutting processing. Therefore, the productivity is low and the manufacturing cost is low, as compared with the conventional shape having a groove.

Further, if the boundary surface between the two flange portions is buried in the plastic material member, the thickness relation of the mounting base portion to the plastic material member may be appropriate. There is no limitation that the thickness of the plastic material member is equal to or greater than the groove of the mounting base and it is necessary to extend to both sides of the groove as in the case of the mounting base having the shape of the groove of the prior art. , Versatile.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional front view of a metal fitting part fixed to a synthetic resin member by insert molding according to an embodiment of the present invention.

FIG. 2 is a side view of a metal fitting part fixed to a synthetic resin member by insert molding according to an embodiment of the present invention.

FIG. 3 is a partial cross-sectional front view of a metal fitting part fixed to a synthetic resin member by insert molding according to a conventional technique.

FIG. 4 is a side view of a metal fitting part fixed to a synthetic resin member by insert molding according to a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Metal fitting parts 2 Tubular male screw part 3 Mounting base 5 Board 21 Female screw 31, 32 Flange part

Claims (2)

[Scope of utility model registration request] 1. A plastic molding by insert molding, which comprises a flange-shaped mounting base part formed integrally by superposing two polygonal or non-circular flange parts with their phases shifted in the rotational direction and being integrally formed. A part fixed to a material member. 2. A component according to claim 1, wherein the thickness of the mounting base is substantially equal to the thickness of the plastic material member.