JP3966633B2 - Hinge and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hinge used for connecting a body and a door of an automobile, and in particular, a pair of support holes arranged coaxially with a pair of opposing outer support walls of a female hinge arm, and the both outer support walls. A pair of bearings arranged coaxially on a pair of opposed inner support walls of a male hinge arm inserted between them is provided, and a huge portion for retaining is formed at both ends of the bearing and the hinge pin fitted into the support hole. The present invention relates to an improved hinge and a manufacturing method thereof.
[0002]
[Prior art]
Conventionally, in such a hinge, in order to prevent rotation of the hinge pin with respect to the outer support wall, a knurl is formed on the outer peripheral surface of the hinge pin and is pressed into the inner peripheral surface of the support hole of the outer support wall. (See, for example, JP-A-61-211473).
[0003]
[Problems to be solved by the invention]
As described above, in the conventional one, since it is necessary to specially knurling the hinge pin, the number of steps is large, which is an obstacle to cost reduction.
[0004]
The present invention has been made in view of such circumstances, and the rotation of the hinge pin with respect to the outer support wall can be reliably achieved by the enormous portions formed at both ends of the hinge pin without forming a knurl on the hinge pin. Thus, an object of the present invention is to provide the hinge that can contribute to cost reduction, and a method for manufacturing the hinge.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a male hinge arm inserted between a pair of outer support walls and a pair of support holes arranged coaxially with a pair of opposite outer support walls of a female hinge arm. A hinge having a pair of bearings arranged coaxially on a pair of inner support walls facing each other, and having a huge portion for retaining at both ends of the bearing and the hinge pin fitted into the support hole. A first feature is that a pyramid-shaped chamfered portion is formed on the outer opening edge of the support hole, and at least one of the enormous portions is formed in a pyramid shape closely mating with the chamfered portion.
[0006]
According to the first feature, at least one of the enormous retaining portions formed at both ends of the hinge pin has a pyramid shape and is closely fitted to the pyramidal chamfered portion, thereby preventing the rotation of the outer support wall. Demonstrate. Therefore, it is not necessary to form a knurling on the hinge pin as in the prior art.
[0007]
According to the second aspect of the present invention, in addition to the above feature, the pyramidal chamfered portions are formed at the outer opening edges of the pair of support holes, and the pyramidal huge portions are formed at both ends of the hinge pin, respectively. Features.
[0008]
According to the second feature, the cone pin chamfered portions of the pair of support holes are closely fitted with the pyramidal massive portions at both ends of the hinge pin, so that the anti-rotation strength of the hinge pin with respect to the outer support wall can be increased.
[0009]
Furthermore, in manufacturing the hinge of the first or second feature, the present invention presses a pyramidal chamfered portion on the outer opening edge of one or both support holes of the both outer support walls, and both the outer support walls. A straight pyramid pin is inserted into the support hole of the inner support wall and the bearings of the inner support walls, both ends thereof are projected out of the support hole, and both ends thereof are caulked, and one or both of them are fitted into the chamfered portion. The third feature is to form the enormous portion of the shape.
[0010]
According to the third feature, the enormous portion for stopping toward both ends of the hinge pin is formed by simple caulking, and at the same time, the enormous portion can be closely fitted to the hexagonal pyramidal chamfered portion, and the flange or knurl Combined with the use of a straight hinge pin with no lead, the cost can be reduced.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on examples of the present invention shown in the accompanying drawings.
[0012]
FIG. 1 is a perspective view of a main part of an automobile showing a use state of a hinge of the present invention, FIG. 2 is a partially longitudinal side view of the hinge, FIG. 3 is a perspective view of a main part of a female hinge arm in the hinge, and FIG. One manufacturing process diagram of the hinge, FIG. 5 is another manufacturing process diagram of the hinge.
[0013]
First, in FIG. 1, a door D is connected to a body B of an automobile via a pair of upper and lower hinges H according to the present invention to open and close its entrance, and a door checker C is attached between the body B and the door D. .
[0014]
As shown in FIGS. 2 and 3, each of the hinges H includes a female hinge arm 10 fixed to a body B by a bolt 12, a male hinge arm 11 fixed to a door D by a bolt 13, and these. It is comprised from the hinge pin 14 connected so that relative rotation is possible.
[0015]
The male hinge arm 11 includes a pair of upper and lower outer support walls 15, 15 that are opposed to each other at a predetermined interval. A pair of support holes 16, 16 aligned coaxially are formed in the outer support walls 15, 15, and hexagonal pyramidal chamfers 17, 17 are formed at the outer opening edges of the support holes 16, 16. Press molded.
[0016]
On the other hand, the male hinge arm 11 includes a pair of upper and lower inner support walls 18, 18 adjacent to the inner surfaces of the pair of outer support walls 15, 15. A pair of bearing holes 19, 19 aligned coaxially with the support holes 16, 16 are formed in the inner support walls 18, 18, and synthetic resin bushes 20, 20 serving as bearings are fitted into these, respectively. At the same time, a flange 20 a integrally formed at one end of each bush 20, 20 is inserted between each adjacent outer support wall 15, 15 and inner support wall 18, 18. At that time, the inner diameters of the bushes 20 and 20 and the inner diameters of the support holes 16 and 16 are set to be the same.
[0017]
A hinge pin 14 is fitted and inserted into the support holes 16 and 16 and the bushes 20 and 20, and hexagonal pyramid-like shapes are fitted to the chamfered portions 17 and 17 at both ends of the pin 14 protruding outside the support holes 16 and 16. Enormous parts 21 and 21 are formed.
[0018]
Thus, the hinge pin 14 is prevented from being detached from the support holes 16 and 16 and the bushes 20 and 20 by the enormous portions 21 and 21 at both ends thereof. Moreover, the enormous portions 21 and 21 have a hexagonal pyramid shape and are closely fitted to the hexagonal pyramidal chamfered portions 17 and 17 of the outer opening edges of the support holes 16 and 16, and therefore, the outer support wall 15 of the hinge pin 14. , 15 can be reliably prevented. Therefore, when the female hinge arm 10 and the male hinge arm 11 are rotated relative to each other when the door D is opened and closed, the bushes 20 and 20 of the male hinge arm 11 smoothly move around the hinge pin 14 without causing the hinge pin 14 to rattle. By rotating, it is possible to ensure a light and quiet opening and closing of the door D.
[0019]
In this way, the enormous parts 21 and 21 for preventing the hinge pin 14 from coming off have a function of preventing the rotation of the pin 14, so that it is not necessary to specially form a rotation knurling around the hinge pin as in the prior art. Cost can be reduced.
[0020]
In particular, as shown in the illustrated example, when the hexagonal pyramid-shaped chamfered portions 17 and 17 and the enormous portions 21 and 21 are provided in two upper and lower sets, the detent strength of the hinge pin 14 against the outer support walls 15 and 15 can be effectively increased. Can do.
[0021]
Next, a method for manufacturing the hinge H will be described with reference to FIGS.
[0022]
When piercing the support holes 16, 16 in the outer support walls 15, 15 of the female hinge arm 10, a hexagonal pyramid chamfer is formed on the outer opening edge of the support holes 16, 16 due to the hexagonal pyramid mold formed in the piercing punch. The parts 17 and 17 are formed simultaneously.
[0023]
When assembling the hinge H, first, as shown in FIG. 4, the inner support walls 18, 18 of the male hinge arm 11 are inserted inside the outer support walls 15, 15 of the female hinge arm 10, and then the support holes 16. 16 and the bushes 20 and 20 are fitted with straight hinge pins 14 having no flanges or knurls.
[0024]
Next, as shown in FIG. 5, both ends of the hinge pin 14 protruding from the support holes 16 and 16 are caulked in the axial direction by a pair of upper and lower caulking tools 25 and 26, and are closely fitted to the chamfered portions 17 and 17. The huge portions 21 and 21 having a hexagonal pyramid shape as shown in FIG.
[0025]
In this way, by crimping the both ends of the hinge pin 14, the hexagonal pyramidal enormous portions 21 and 21 can be formed and the hexagonal pyramidal chamfered portions 17 and 17 can be formed at the same time. There is no increase, and the use of the straight hinge pins 14 can greatly reduce the cost.
[0026]
The present invention is not limited to the above embodiment, and various design changes can be made without departing from the scope of the invention. For example, the chamfered portion 17 and the enormous portion 21 are not limited to hexagonal pyramids, but can be formed in other pyramid shapes such as quadrangular pyramids and pentagonal pyramids. Further, the hinge H of the present invention can be used for connecting other than the body B and door D of the automobile.
[0027]
【The invention's effect】
As described above, according to the first feature of the present invention, at least one of the enormous retaining portions formed at both ends of the hinge pin has a pyramid shape and is closely fitted to the pyramidal chamfered portion of the support hole of the outer support wall. As a result, the anti-rotation function with respect to the outer support wall is exhibited, so that it is not necessary to form a knurling on the hinge pin as in the conventional case, man-hours can be reduced, and cost can be reduced.
[0028]
According to the second feature of the present invention, the pyramidal chamfered portions are formed at the outer opening edges of the pair of support holes, and the pyramidal huge portions are formed at both ends of the hinge pin. The detent strength of the hinge pin with respect to the wall can be effectively increased.
[0029]
Further, according to the third aspect of the present invention, in manufacturing the hinge, a pyramidal chamfered portion is press-molded on the outer opening edge of one or both support holes of the outer support walls, and the outer support walls of the both outer support walls are pressed. A straight hinge pin is inserted into the support hole and the bearings of the inner support walls, both ends of the pin are protruded from the support hole, and both ends thereof are crimped. Therefore, it is possible to mold the enormous parts for locking to both ends of the hinge pin by simple caulking, and at the same time, to fit the enormous parts into the hexagonal pyramidal chamfered parts, Combined with the use of no straight hinge pins, the cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view of a main part of an automobile showing a usage state of a hinge according to the present invention. FIG. 2 is a partially longitudinal side view of the hinge.
FIG. 3 is a perspective view of a main part of a female hinge arm in the hinge.
FIG. 4 is a manufacturing process diagram of the hinge.
FIG. 5 is another manufacturing process diagram of the hinge.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Female hinge arm 11 ... Male hinge arm 14 ... Hinge pin 15 ... Outer support wall 16 ... Support hole 17 ... Pyramidal chamfer 18 ... Inner support wall 20 ... Bushing 21 as a bearing ... Pyramidal pyramid

Claims (3)

A pair of support holes (16) aligned coaxially with a pair of opposed outer support walls (15) of the female hinge arm (10), and a male hinge arm inserted between the outer support walls (15). A pair of bearings (20) arranged coaxially on a pair of opposing inner support walls (18) of (11) are provided, and both ends of the hinge pins (14) inserted into the bearings (20) and the support holes (16). In a hinge formed with a huge part (21) for retaining the
A pyramidal chamfered portion (17) is formed on the outer opening edge of at least one of the support holes (16), and at least one of the enormous portion (21) is formed in a pyramidal shape that fits the chamfered portion (17). A hinge characterized by that. The hinge according to claim 1,
The pyramidal chamfered portion (17) is formed at the outer opening edge of the pair of support holes (16), and the pyramidal engraved portion (21) is formed at both ends of the hinge pin (14). To hinge. In manufacturing the hinge according to claim 1 or 2,
A pyramidal chamfered portion (17) is press-molded on the outer opening edge of one or both support holes (16) of the both outer support walls (15), and the support holes (16) of the both outer support walls (15). And, a straight hinge pin (14) is inserted into the bearing (20) of the inner support walls (18), both ends thereof are projected out of the support hole (16), and both ends thereof are caulked, and one or both of them Is formed into a pyramidal enormous portion (21) that fits in the chamfered portion (17).

Images