JPH04201635A - Seat device for automobile - Google Patents

Abstract

PURPOSE:To improve strength without increasing the dimension of a member by superposing a reinforcing plate on the seat belt installation part of the lower arm of a reclining device, joining a connecting flange installed on the movable rail of a seat slide device by nipping by the lower arm and the reinforcing plate, and tightening each joint part by bolts. CONSTITUTION:The upper part of the movable rail 6 of a seat slide device 17 is projected from the slit of a fixed side rail 7, and a connecting flange part 11 is formed. This flange part 11 is joined so as to be nipped by the lower arm 2 of a seat reclining device 1 and a reinforcing plate 3, and fixed by the installation holes 4 and 12 and rivets 10. At this time, the reinforcing plate 3 is superposed with a bolt 5 for installing a seat belt anchor plate 8 for the lower arm 2, and fixed through the spot welding 19. The seat belt anchor plate 8 is installed on the installation bolt 5 by a nut 9.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seat device for an automobile, particularly a movable side rail of a seat slide device that moves the seat back and forth, a reclining device that adjusts the inclination angle of the seat back, and a part of the seat heel anchor. Regarding the joint structure.

In recent years, it has become common to attach a part of the seatbelt anchor to the movable rail side of the seat slide device in order to improve the ease of wearing the seatbelt.
Extremely high strength is required around the joints with the seat slide device and reclining device.

An example of a seat device with such a configuration is the
It is disclosed in Japanese Patent No. 6964. In this device, the lower arm of the reclining device is attached from one side of the movable side rail of the seat sliding device to the connecting flange portion that protrudes above the fixed rail via a spacer with bolts, etc., and the anchor plate of the seat held is
A bolt is inserted between the connecting flange of the movable rail and the lower arm through a spacer.

As mentioned above, because the lower arm is joined along one side of the connection flange of the fixed side rail and a part of the seat belt anchor is joined to the same side, an offset occurs in the width direction at the joint, and the joint bolt or bolt When a moment load from the seat back or a belt load is applied to the seat and the surrounding wall surface, an excessive bending moment acts simultaneously with the shearing action.

Therefore, in order to create a structure that can withstand these large external forces, it is necessary to strengthen the scant rings of the members, such as by increasing the plate thickness of each member of the movable side rail and lower arm, and the outer diameter of the bolt or bottle.

The present invention has been developed in consideration of the above-mentioned problems with the structure of the lower arm of the seat slide device and the reclining device, as well as the joint portion of the seat belt anchor. A configuration that prevents excessive shear stress or bending moment from acting on the bolts, pins, or plate members at the joint when a load is applied, and allows for effective joining without significantly increasing the dimensions of the members. An object of the present invention is to provide an automobile seat device having the following features.

In order to solve the above-mentioned problems, the automobile seat device of the present invention has a lower arm of a reclining device on one side with respect to a connecting flange that protrudes upward from a fixed rail of a movable rail of a seat sliding device. and a reinforcing plate on the other side, overlapping these three members and fastening them with rivets or bolts, and overlapping the reinforcing plate on the seat belt attachment part of the lower arm, , the seatbelt is attached by fastening the reinforcing plate and the seatbelt anchor with bolts.

Construction ■ With the above configuration, the reinforcing plate is placed near the center of the movable side rail, which requires the most cross-sectional rigidity against the load from the seatback and the seat belt, increasing the cross-sectional rigidity. , Also, since the force from the lower arm and seat belt is applied to both sides of the movable rail,
The bending moment acting on the bolts that connect the movable side rail to the lower arm and reinforcing plate and the bolts that connect the lower arm, reinforcing plate, and seat belt anchor is reduced, and the dimensions of the members can be reduced compared to conventional joining methods. .

In addition, when using soft materials such as aluminum or magnesium for the rail members and steel for the lower arm, the conventional joining method does not allow the use of soft materials for boat fishing due to the pressure force during rivet connection and the torque during bolt connection. However, according to the present invention, the reinforcing plate is brought into contact with the side surface of the movable side rail opposite to the lower arm, and the above-mentioned members that sandwich both sides of the movable side rail made of a soft material are made of steel material. As a result, deformation of the movable rail is extremely reduced.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is an exploded perspective view showing a first embodiment of the present invention, and FIG. 2 is a sectional view taken along the line ■--■ in FIG.

The automobile seat device of this embodiment includes a fixed side rail (lower rail) 7 and a movable side rail (upper rail) that are mutually movable in the front-rear direction via rollers 13 and balls 14.
6, and a reclining device 1 that allows the seat back to tilt.

The upper part of the movable rail 6 of the seat slide device 17 extends upward through a slit provided on the top surface of the fixed rail 7 to form a connecting flange portion 11 . The connecting flange portion 11 has three mounting holes 12 protruding in the front-rear direction, and correspondingly, the lower arm 2 of the reclining device 1 and the lower arm 2 of the reclining device 1 are brought into contact with each other by spot welding 19. Attachment holes 4 are provided in a protruding manner in each of the reinforcing plates 3 that are fixed to each other. The lower arm 2 and the reinforcing plate 3 are connected to each other in opposite directions slightly below the welding position 19 so that the connecting flange portion 11 is sandwiched between them, and the thickness of the flange portion 11 extends through the mounting holes 4 and 12 so that the lower arm 2 and the reinforcing plate 3 can be connected with rivets. The bent portions 18 are formed so as to be separated by a certain amount.

The reinforcing plate 3 is connected to the connecting flange portion 1 of the movable rail 6.
1 and the mounting bolt 5 of the seat belt anchor plate 8.

The lower arm 2 is attached to the connecting flange portion 11 of the movable side rail 6.
and reinforcing plate 3 are integrated by welding, and the mounting holes 4 and 12 are aligned, and the rivet 1 is inserted.
0, and the belt anchor plate is attached by passing the attachment hole of the belt anchor plate 8 through the bolt 5 that passed through the attachment hole 16 of the lower arm 2 and the reinforcing plate 3, and hooking the napht 9.

As described above, the slide device 217 and the reclining device 1
is attached by fastening rivets with the connecting flange portion 11 of the movable side rail 6 sandwiched between the lower arm 2 and the reinforcing plate 3, so that external force from the seat back and seat belt due to seat reclining is applied to the connecting portion. When applied, the external force is equally applied to the joining rivet 10 and the movable rail 6 via the lower arm 2 and reinforcing plate 3, and a large bending moment does not act as in the case of the prior art. Further, since the reinforcing plate 3 is disposed near the center of the movable side rail where the load from the seat bank and the load from the seat heald are greatest, sufficient cross-sectional rigidity can be provided.

FIG. 3 is a diagram showing the configuration of the second embodiment. This embodiment is similar to the first embodiment except that the fixing of the lower arm 2 and reinforcing plate 3 by welding 19 in the first embodiment is omitted. Therefore, since the bonding strength between the lower arm 2 and the reinforcing plate 3 is slightly lower than that in the first embodiment, the first embodiment has no strength effect against the input of external force from seat reclining, but the seat Since the shearing force of the bolt 5 contributes to the input from the belt, it is considered that the strength effect is generally the same, and the ease of assembly is superior to that of the first embodiment.

In both the first and second embodiments, if the movable side rail 6 is made of a soft material such as aluminum or magnesium, and the lower arm 2 and the reinforcing plate 3 that are in contact with both sides are made of steel, then the There is no concern about deformation due to pressure or torque during bolt connection.

4-1 As described above, according to the present invention, with a simple configuration, the joint can be easily fixed when an external force is applied from the seat bank or the seat belt to the joint between the movable side rail, the lower arm of the reclining device, and the seat belt anchor. This prevents excessive shear stress and bending moment from occurring in the structural members of the movable side rail, and reinforces the area near the center of the movable side rail where cross-sectional rigidity is most required to withstand the load from the seat back and the load from the belt. Since the plates are arranged, it is not necessary to increase the dimensions of each member, and the weight can be reduced compared to the conventional method.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing the configuration of a first embodiment of the present invention;
FIG. 2 is a sectional view taken along line nn in FIG. 1, and FIG. 3 is an exploded perspective view showing the configuration of the second embodiment. 1... Reclining device 2... Lower arm 3... Reinforcement plate 4... Mounting hole 5... Bolt 6... Movable side rail 7... Fixed side rail 8... Seat belt anchor plate 9... Nut 10... Rivet 11... Connection flange part 12.15.16... Mounting hole 17... Slide device 18... Bending part 19... Welding department agent Person Patent attorney Hideaki Kuwahara 2nd
figure

Claims (2)

[Claims] (1) A lower arm of a reclining device that tilts the seat back is joined to a connecting flange portion of a movable rail that slides within a fixed rail of a seat slide device that moves the seat in the front-rear direction and projects upward from the fixed rail, and In the automobile seat device in which one end of the seat belt is attached to the lower arm, the lower arm is arranged on one side of the connection flange, a reinforcing plate is arranged on the other side, and these three members are arranged. The seatbelt is attached by overlapping and fastening with rivets or bolts, and by overlapping the reinforcing plate on the seatbelt attachment part of the lower arm, and fastening the lower arm, the reinforcing plate, and the end of the seatbelt with bolts. Automotive seat device. (2) The seat device according to claim 1, wherein the movable rail is made of a soft material such as aluminum, and the lower arm and reinforcing plate are made of a steel material.