JPH0953631A - Reinforcing metal fitting for resin-made parts - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcing metal fitting capable of reinforcing for preventing the screw fastening part of even thin wall resin-made parts from cracking and breaking. SOLUTION: A circular screw insertion hole 12 is formed at a position opposing to the screw insertion hole 1a of the resin-made part 1 of a metal fitting 11 made of a plate that can be elastically deformed. The diameter of this screw insertion hole 12 is made so as to be larger than the diameter of the shank section 2a of a screw 2 and smaller than the diameter of the head section 2b of the screw 2. A V-like slotting section 13 is notched from the tip to the center section of the metal fitting 11. A pair of elastic lock sections 14 and 14 are integrally formed on both sides of this slotting section 13. The width between ends of a pair of these elastic lock sections is wider than the width between a pair of reinforcing ribs 1b and 1b on both sides of the upper face of the resin-made parts 1. A pair of stoppers 15 and 15 are formed by being folded slant downward on both sides of the base end section side of the metal fitting 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin component reinforcing metal fitting for improving the strength of a resin component.

[0002]

2. Description of the Related Art For example, resin parts that can be mass-produced in arbitrary shapes by molding synthetic resin are widely used as exterior parts for video tape recorders (VTRs), television receivers and the like. This resin component is generally fastened and fixed to a VTR main body or the like as a fastened body via fastening means such as a screw. This will be specifically described with reference to FIGS. 8 and 9. In FIG. 8, the resin component 1 is connected to the VTR via the screw (fastening means) 2, the washer 3 and the washer 4.
FIG. 10 is a cross-sectional view showing a state where the main body (fastened body) is fastened and fixed, and FIG. 9 is a plan view of the same state. As shown in FIG. 8, a screw insertion hole (fastening portion) 1a is formed in the center of the base side of the resin component 1, and reinforcing ribs (engaging portions) 1b, 1b are provided on both sides of the upper surface thereof. It is integrally formed.

The resin component 1 is fastened and fixed by being screwed into the screw screw hole 5a of the VTR main body 5 via the screw 2 or the like inserted in the screw insertion hole 1a. . Further, the resin component 1 tends to be thin due to restrictions on the installation space and the like, and in order to reinforce this, the pair of reinforcing ribs 1 as engaging portions are provided on both sides of the upper surface.
b and 1b are integrally formed.

[0004]

However, if the thin resin part 1 is fastened and fixed to the VTR main body 5 with screws 2 too strongly as the resin part 1 becomes thinner, as shown in FIG.
As shown in (3), cracks K, breakage, etc. were likely to occur in the screw fastening portion around the screw insertion hole 1a of the resin component 1.

In order to deal with this, the resin part 1 is
It may be fixed to the main body 5 with an adhesive or welded, but when fixing with an adhesive, if the VTR main body 5 is made of metal, reliability of the fixed state and strength maintenance due to temperature change etc. Is difficult, and in the case of fixing by welding, since the protrusions for welding are to be provided on the resin component 1 side from the beginning, the structure of the resin component 1 becomes complicated and
The installation work became complicated and costly.

In view of the above, the present invention provides a reinforcement for a resin component, which is capable of simply and reliably fastening and fixing it to an object to be fastened without causing damage such as cracks or damages in the fastening portion even in a thin resin component. It is to provide metal fittings.

[0007]

[Means for Solving the Problems] Reinforcement for resin parts, in which a fastening part is formed in a metal fitting body, and a resin part is fastened to the object to be fastened together with the fitting body by fastening means through the fastening part. In the metal fitting, an elastic locking portion that elastically locks with the engaging portion of the resin component is formed on the metal fitting body.

When a resin component is attached to the body to be fastened, the elastic locking portion of the reinforcing metal fitting is elastically locked to the engaging portion of the resin component, and the fastening portion of the resin component and the fastening portion of the reinforcing metal fitting are joined together. In a state where the positions are aligned, the resin part is fastened and fixed to the object to be fastened together with the reinforcing metal fitting through the fastening means. Since the resin component is surely reinforced by the reinforcing metal fitting, cracks or damages do not occur around the fastening portion of the resin component.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

1 to 3 show a reinforcing metal fitting for resin parts according to a first embodiment of the present invention. The metal fitting body 11 of the resin component reinforcing metal fitting 10 is formed of an elastically deformable thin metal plate into a generally rectangular plane shape. A circular screw insertion hole (fastening portion) 12 is formed at a position facing the screw insertion hole (fastening portion) 1a of the resin component 1 closer to the base end than the center of the metal fitting body 11. This screw insertion hole 1
The diameter of the screw 2 is larger than the diameter of the shank portion 2a of the screw (fastening means) 2 and smaller than the diameter of the head portion 2b of the screw 2.

Further, a V-shaped slitting portion 13 is cut out from the front end portion to the central portion of the metal fitting body 11, and a pair of elastic locking portions 14 and 14 are formed on both sides of the slitting portion 13.
Are integrally formed. The pair of elastic locking portions 14, 14
The width L between the respective tips is wider (L> L ') than the width L'between the pair of reinforcing ribs (engaging portions) 1b, 1b on both sides of the upper surface of the resin component 1. Further, both sides of the metal fitting body 11 on the base end side are bent downward to form a pair of stoppers 15, 15.

The shape of the metal fitting body 11 for reinforcing resin parts is not limited to the planar shape shown in FIGS.
As shown in another embodiment of the metal fitting body 11 shown in FIG. 4, a slit groove hole 16 is provided between the screw insertion hole 12 and the slit portion 13.
Is formed to change the strength of the elastic force of the pair of elastic locking portions 14 and 14, or as shown in the metal fitting body 11 of another aspect shown in FIG. The hooks 14a, 14a may be formed on the outside of the tip of the to strengthen the removal force between the pair of reinforcing ribs 1b, 1b of the resin component 1. Incidentally, FIG. 3 shows a part of the VTR main body 5 as the fastened body. A screw screwing hole 5a is formed at a predetermined position of the VTR body 5, and the resin component 1 and the fastening metal fitting 1 through the screw (fastening means) 2, the washer 3 and the washer 4.
0 is fastened and fixed.

According to the resin component reinforcing metal fitting 10 of the first embodiment described above, the width L between the pair of elastic locking portions 14, 14 of the metal fitting body 11 is determined by the pair of reinforcing ribs of the resin component 1. 1
Since the size is wider than the width L'between the b and 1b, as shown in FIG. 2, when the metal fitting body 11 is inserted into the portion of the resin part 1 between the pair of elastic ribs 1b and 1b to be reinforced, The slit portion 13 of the metal fitting body 11 is narrowed, and a predetermined position on the upper surface of the resin component 1, that is, the pair of stoppers 15, 15 on the base end side of the metal fitting body 11 strikes one end of the resin component 1. It fits into the position. A pair of reinforcing ribs 1b, 1 of the resin part 1 of the reinforcing metal fitting 10
The insertion (removal) force between b can be given an appropriate value by changing the dimension L or by utilizing the spring property of the material used, so that it is shown in FIG. 2 without using a tool. As described above, the reinforcing metal fitting 10 can be attached to the resin component 1 safely and reliably.

The slot portion 13 provided from the tip to the center of the reinforcing metal fitting 10 has a width while the reinforcing metal fitting 10 is inserted between the pair of reinforcing ribs 1b, 1b of the resin component 1. It narrows, and its reaction force, that is, the elastic force of the pair of elastic locking portions 14 and 14 toward the slit portion 13 plays a so-called self-locking role. In this way, the reinforcing metal fitting 10 attached to the resin component 1 with one touch does not drop or move from the resin component 1 and functions as a reinforcing plate for the resin component 1. as a result,
When the resin part 1 reinforced by the reinforcing metal fitting 10 is attached to the VTR main body 5 with the screw 2,
The screw 2 is inserted into the screw insertion hole 5a of the VTR main body 5 by inserting the screw 2 through each of the screw insertion holes 12 and 1a while the positions of the screw insertion hole 12 of the resin component 1 and the screw insertion hole 1a of the resin component 1 are aligned. By screwing, the resin component 1 is fastened and fixed to the VTR main body 5 together with the reinforcing metal fitting 10. Further, since the resin component 1 is reliably reinforced by the reinforcing metal fitting 10, there is no crack or damage in the screw fastening portion around the screw insertion hole 1a of the resin component 1 unlike the conventional case.

Further, since the reinforcing metal fitting 10 can be attached to the resin component 1 with one touch, it can be attached to a resin component (not shown) whose screw fastening portion is already partially damaged before the damage. The strength of the similar screw fastening portion can be maintained, and the cost can be significantly reduced. As described above, even with the resin part 1 having a reduced thickness, the reinforcing metal fitting 10 does not cause damage such as cracks or breakage in the screw fastening portion. Furthermore, the strength of the resin component 1 can be further improved with a small number of components, a simple structure, and low cost.

6 and 7 show a reinforcing metal fitting 10 'for a resin component according to the second embodiment. The metal fitting body 11 'of the resin component reinforcing metal fitting 10' is formed in a flat rectangular shape by an elastically deformable thin metal plate. A circular screw insertion hole (fastening portion) 12 is formed at a position facing the screw insertion hole (fastening portion) 1a of the resin component 1 closer to the base end than the center of the metal fitting body 11 '. This screw insertion hole 12
Is larger than the diameter of the shank portion 2a of the screw (fastening means) 2 and smaller than the diameter of the head portion 2b of the screw 2.

Further, the bent portion is cut out so as to project upward in a V shape from the tip portion to the central portion of the metal fitting body 11 ', and this bent portion serves as the elastic locking portion 14'. There is. The height H of the elastic locking portion 14 'is higher than the height H'in the rectangular tubular portion (engaging portion) 1c of the resin component 1'shown in FIG. 7 (H> H '). Further, both sides of the metal fitting body 11 'on the base end side are bent downward to form a pair of stoppers 15,15.

According to the resin component reinforcing metal fitting 10 'of the second embodiment described above, the height H of the elastic locking portion 14' formed by bending on the tip end side of the metal fitting body 11 'is the resin. Since the size is higher than the height H'in the tubular portion 1c of the component 1 ', when the metal fitting body 11' is inserted into the tubular portion 1c of the resin component 1'as shown in FIG. The elastic locking portion 14 'of the metal fitting body 11' is elastically deformed, and the pair of stoppers 15, 15 on the base end side of the metal fitting body 11 'are inserted and stored until they come into contact with one end of the resin component 1'. It The force for inserting (removing) the reinforcing metal fitting 10 'into the cylindrical portions 1c, 1b of the resin part 1'can be given an appropriate value by changing the dimension H and utilizing the spring property of the material used. Therefore, the reinforcing metal fitting 10 'can be safely and reliably attached to the resin component 1', as shown in FIG. 7, without using a tool.

Further, as in the case of the first embodiment, the reinforcing metal fitting 1 attached to the resin component 1'with one touch is provided.
0'will not fall or move from the resin part 1 ', and will function as a reinforcing plate for the resin part 1'.
Further, since the resin component 1'is surely reinforced by the reinforcing metal fitting 10 ', cracks or damages are caused in the screw fastening portion around the screw insertion hole 1a of the thinned resin component 1'as in the conventional case. It is possible to further improve the strength of the resin part 1'with a small number of parts and a simple structure and at low cost.

According to each of the above-mentioned embodiments, the reinforcing metal fitting and the resin component are fastened and fixed to the fastened body using the screws, but the fastening means is not limited to the screws, and other fastening means such as bolts may be used. You may use. Further, although the reinforcing metal fitting for the exterior part for the VTR has been described, it goes without saying that the fastened body is not limited to the VTR and may be an electric device such as a television receiver or a device other than the electric device.

[0021]

As described above, according to the present invention, the fastening portion is formed in the metal fitting body, and the resin component is fastened and fixed to the object to be fastened together with the metal fitting body by the fastening means via the fastening portion. In the reinforcing metal fitting for a resin component, the elastic main body has an elastic locking portion elastically locking to the engaging portion of the resin component. The resin component can be easily attached to the resin component, and after the resin component is fastened and fixed to the object to be fastened, the resin component can be reliably reinforced only by the metal fitting body. As a result, even if the resin component is thinned, it is possible to reliably prevent the occurrence of cracks or damage around the fastening portion.

[Brief description of drawings]

FIG. 1A is a plan view of a reinforcing metal fitting for a resin component according to a first embodiment of the present invention, FIG. 1B is a side view of the reinforcing metal fitting, and FIG. Rear view of.

FIG. 2 is a plan view showing a state where the reinforcing metal member of the first embodiment is inserted between a pair of reinforcing ribs of a resin component.

FIG. 3 is a cross-sectional view showing a state in which a resin component is fastened and fixed to an object to be fastened together with the reinforcing metal fitting of the first embodiment.

FIG. 4 is a plan view showing another aspect of the reinforcing metal fitting of the first embodiment example.

FIG. 5 is a plan view showing another aspect of the reinforcing metal fitting of the first embodiment.

FIG. 6A is a plan view showing a reinforcing metal fitting for a resin component according to a second embodiment of the present invention, and FIG. 6B is a side view of the reinforcing metal fitting.

FIG. 7 is an explanatory view showing a state in which the reinforcing metal member of the second embodiment is inserted into the tubular part of the resin component.

FIG. 8 is a cross-sectional view showing a state in which a conventional resin component is fastened and fixed to a fastened body.

FIG. 9 is a plan view showing a state in which a conventional resin component is fastened and fixed to a fastened body.

[Explanation of symbols]

 1, 1 '... Resin part 1b ... Reinforcing rib (engaging part) 1c ... Cylindrical part (engaging part) 2 ... Screw (fastening means) 5 ... VTR main body (fastened body) 10, 10' ... Reinforcing metal fitting 11 , 11 '... Metal fitting body 12 ... Screw insertion hole (fastening portion) 13 ... Sliding portion 14, 14 ... A pair of elastic locking portions 14' ... Bending portion (elastic locking portion)

Claims (3)

[Claims] 1. A reinforcing metal fitting for a resin component, wherein a fastening portion is formed on a metal fitting body, and a resin component is fastened and fixed to an object to be fastened together with the metal fitting body by fastening means via the fastening portion. A reinforcing metal fitting for a resin component, characterized in that an elastic locking portion which is elastically locked to an engaging portion of the resin component is formed on the metal fitting body. 2. The reinforcing metal fitting for a resin component according to claim 1, wherein a slit portion is formed by cutting out from a tip portion to a central portion of the metal fitting body, and a pair of the elastic locks are provided on both sides of the slit portion. Reinforcing metal fittings for resin parts, characterized in that each part is integrally formed. 3. The reinforcing metal fitting for a resin component according to claim 1, wherein a bent portion is formed from a front end portion to a central portion of the metal fitting body, and the bent portion serves as the elastic locking portion. Reinforcing metal fittings for resin parts.