JPH08207581A - Pierce nut and door hinge plate using the same - Google Patents

Abstract

PURPOSE: To provide a pierce nut easy for fitting a heavy weight or the like and free from any damages of dies during the driving operation and a door hinge plate. CONSTITUTION: A pierce nut consists of an outer leg cylindrical part 3 having an inclined surface 2 on the inside surrounding an annular groove 1 and an inner leg cylindrical part 5 provided with a female screw part 4, and a guide cylinder where this inner leg cylindrical part 5 is formed in the length capable of being projected from the end face of the outer leg cylindrical part 3 over a work to be tightened. A chamfered part 8 is formed on its leg end.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pierce nut and a door hinge plate using the pierce nut.

[0002]

2. Description of the Related Art As shown in FIG. 6, a pierce nut surrounds an annular groove 1 and has an outer leg cylinder portion 3 having an inclined surface 2 inside.
And an inner leg cylinder portion 5 having a female screw portion 4 at the center. Then, the metal plate material 6 is placed on the die 7, and the pierce nut is driven by the punch from above,
As shown in the figure, the inner leg tubular portion 5 punches out the metal plate material 6, and the peripheral portion thereof is plastically deformed and enters the inside of the annular groove 1,
It will be firmly fixed to the metal plate member 6. Therefore, the female screw portion 4 is used to screw various parts to the metal plate member 6.

However, in the conventional pierce nut, as shown in FIG. 6, the length of the inner leg cylinder portion 5 is short, and the lower end thereof does not protrude beyond the lower surface of the metal plate member 6. Therefore, when the member attached to the pierce nut is a heavy member, the pierce nut cannot be used for positioning, and it is not easy to insert the mounting bolt into the female thread portion 4 of the pierce nut. Therefore, for example, when a door hinge plate having a pierce nut driven therein is used to mount an automobile door, the positioning of the door hinge and the door support member is hindered.

In order to solve this drawback, a method has been used in which a metal plate member 6 is preliminarily perforated, and a weld nut having a guide portion is inserted into the metal plate member 6 and welded. Since a separate process called welding is required,
There was a problem that it was less economical than pierce nuts.

Further, in the above-mentioned conventional pierce nut, since the peripheral edge of the leg end of the inner leg tubular portion 5 is approximately 90 degrees, the punching material 6a of the metal plate material 6 is sheared into a disk shape and punched. There was a risk that the punching material 6a would rise when the die was raised and damage the die during the next punching.

[0006]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned conventional problems and facilitates attachment of heavy objects,
Further, the present invention is made in order to provide a pierce nut that does not damage the die during driving, and a door hinge plate using the pierce nut.

[0007]

The pierce nut of the present invention, which has been made to solve the above-mentioned problems, has an outer leg cylinder portion which has an inclined surface on the inner side and surrounds an annular groove, and an inner thread portion. A guide cylinder having a length that allows the inner leg cylinder part to project from the end surface of the outer leg cylinder part beyond the object to be fastened, and a chamfered part is formed at the leg end. It is characterized by that. Further, the door hinge plate body of the present invention is characterized in that the above-mentioned pierce nut is driven into a portion corresponding to a door hinge mounting hole of the door hinge plate, and an inner leg cylinder portion thereof is used as a mounting portion between the door hinge and the door supporting member. Is.

[0008]

In the pierce nut of the present invention, the inner leg tube portion constitutes the guide tube, and the chamfered portion is formed at the leg end thereof.
Using this portion, other members can be positioned and easily attached. Therefore, if the pierce nut of the present invention is used for a door hinge plate, it is possible to easily attach a heavy door hinge and a door support member. Further, in the pierce nut of the present invention, since the chamfered portion is formed at the leg end, the peripheral edge of the punched material of the metal plate material is bent upward. Therefore, the frictional resistance between the punched material and the inner surface of the die becomes large, and the punched material is prevented from being lifted up, so that the mold can be prevented from being damaged.

[0009]

The present invention will be described below in more detail with reference to the illustrated embodiments. FIG. 1 shows a typical embodiment of the pierce nut of the present invention, which is provided with an outer leg cylinder portion 3 surrounding an annular groove 1 and having an inclined surface 2 on the inner side, and a female screw portion 4 as in the conventional case. It is composed of the inner leg tube portion 5. However, unlike the conventional case, the inner leg tubular portion 5 is formed so as to project from the end surface of the outer leg tubular portion 3 beyond the thickness of the object to be fastened 1 to form a guide tube, and the chamfered portion is formed at the leg end thereof. 8 is formed.

As shown in FIG. 2, such a pierce nut is used by placing a metal plate 6 on a die 7 and punching it in from above, and at this time, the inner leg is used as in the conventional case. While the cylinder portion 5 punches out the metal plate material 6, the peripheral edge portion thereof is plastically deformed and enters the inside of the annular groove 1, and is firmly fixed to the metal plate material 6. At this time, the chamfered portion 8 at the leg end causes the peripheral edge of the punched material 6a of the metal plate material 6 to be bent upward as shown in the figure, so that the friction resistance between the punched material 6a and the die inner surface 7a becomes large, and the pierce Even when the nut and the metal plate material 6 are pulled out from the die 7, the punched material 6a does not float.

Further, in the pierce nut of the present invention driven into the metal plate member 6 as described above, since the inner leg tubular portion 5 projects more than the end surface of the outer leg tubular portion 3 to form a guide tube, The object 9 to be fastened and the member 10 to be fastened with the mounting holes formed in advance can be fitted to the inner leg tubular portion 5 as shown in FIG. 3 and easily fixed by the bolt 11. At this time, even if the member 10 to be attached is a heavy member, the inner leg tube portion 5 acts as a guide tube, so that positioning can be performed easily and the attachment work becomes easy. Further, the chamfered portion 8 at the leg end acts as a guide when fitting the object to be fastened 9 and the member 10 to be fitted.

FIG. 4 shows an embodiment of a door hinge plate using the above pierce nut, in which the pierce nut is driven into a portion of the door hinge plate body 12 which corresponds to a door hinge mounting hole in the longitudinal direction. The peripheral edge of the door hinge plate body 12 is bent to reinforce the reinforcement piece 1.
It is said to be 3, 13. This door hinge plate is shown in FIG.
As shown in FIG.
Is used to attach the door hinge 16 of the door 15 as the member to be attached.

In this case, one side of the door hinge 16 is previously attached to the door.
A door hinge plate is used to attach the other side of the door hinge 16 to the door support member 14 attached to the door support member 15. That is, the inner leg tube portion 5 of the pierce nut driven into the door hinge plate is inserted into the mounting hole of the door support member 14, the door hinge 16 is further attached to the inner leg tube portion 5, and the bolt 17 is attached to the female thread of the pierce nut. The door support member 14 and the door hinge 16 are fixed by being screwed into the portion 4.

[0014]

As described above, the pierce nut of the present invention is different from the conventional product in that the inner tube portion is formed with a length such that it can project from the end surface of the outer tube portion to the object to be fastened. In addition, since a chamfered portion is formed at the leg ends of the above, it is easy to attach a heavy object or the like, and there is no risk of damaging the die during driving. A door hinge plate using this is suitable for attaching a heavy door to a door support member. Therefore, the present invention has great industrial value as a pierce nut and a door hinge plate using the pierce nut, which solves the conventional problems.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing a state in which the pierce nut of the present invention is driven into a metal plate material.

FIG. 3 is a cross-sectional view showing a state in which an object to be fastened is attached using the pierce nut of the present invention.

FIG. 4 is a perspective view showing an embodiment of a door hinge plate of the present invention.

FIG. 5 is a plan view showing a use state of the door hinge plate of the present invention.

FIG. 6 is a cross-sectional view showing a state in which a conventional pierce nut is driven into a metal plate material.

[Explanation of symbols]

 1 Annular groove 2 Inclined surface 3 Outer leg cylinder part 4 Female screw part 5 Inner leg cylinder part 6 Metal plate material 6a Stamping material 7 Die 7a Die inner surface 8 Chamfered part 9 Fastened object 10 Attached member 11 Bolt 12 Door hinge plate body 13 Reinforcement piece 14 Door support member 15 Door 16 Door hinge 17 Bolt

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Takayuki Sano 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa Nissan Motor Co., Ltd. (72) Hiroshi Kajino 1-8, Takahashi, Oguchi-cho, Niwa-gun, Aichi Incorporated company Aoyama Factory Oguchi Factory (72) Inventor Kozo Mizuno 1-8 Takahashi, Oguchi-cho, Niwa-gun, Aichi Stock Company Aoyama Factory Oguchi Factory (72) Inventor Atsushi Mizutani 1-8 Takahashi, Oguchi-cho, Niwa-gun, Aichi Company Aoyama Factory Oguchi Factory

Claims (2)

[Claims] 1. An outer leg cylinder portion which surrounds an annular groove and has an inclined surface on the inner side, and an inner leg cylinder portion having a female screw portion formed therein, the inner leg cylinder portion being covered from an end surface of the outer leg cylinder portion. A piercing nut, comprising a guide tube formed to have a length that can project beyond the tightening object, and having a chamfered portion formed at its leg end. 2. A piercing nut according to claim 1 is driven into a portion of a door hinge plate for fixing a door hinge, the portion corresponding to a door hinge mounting hole, and an inner leg cylinder portion thereof is used as a mounting portion for a door hinge and a door supporting member. The characteristic door hinge plate.