JPH0582340U - Seat back frame - Google Patents

Abstract

(57) [Abstract] [Purpose] Attach both ends of the support wire 26 to the frame body 2
When fixing it to the left and right frame portions 25a of No. 5 by welding, the support wire 26 can be positioned and set in a state where the support wire 26 is reliably prevented from rotating, and problems such as welding defects can be solved.
It is an object of the present invention to provide a seatback frame that does not cause a problem that the seated person feels uncomfortable to sit in due to the projection and that the console box 27 is not hindered from being mounted. [Structure] A bent portion 26a that is bent and welded and fixed along the surfaces of the left and right frame portions 25a to both end sides of a support wire 26 that is bridged between the left and right frame portions 25a of the frame body 25 and fixed by welding. It is characterized by having a welding positioning terminal portion 26b extending from the curved portion 26a toward the outer rear surface of the left and right frame portions 25a.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a seat back frame for a vehicle seat installed in a vehicle such as an automobile, and more particularly to a seat back frame in which a support wire for pressing the back surface of a pad is hung between left and right frame parts.

[0002]

[Prior Art]

 As shown in FIG. 3, a vehicle seat includes a seat cushion 1 and a seat back 2 pivotally attached to the seat cushion 1 so that the seat cushion 1 can be tilted forward. As shown in FIGS. 3 and 4, the seat back 2 includes a seat back frame 3, a seat back pad 4 fitted on the front side of the seat back frame 3, and a surface of the seat back pad 4. It is composed of an outer skin 5 which is encapsulated and fixed to the back surface of the seat back frame 3 by a hog ring 5a. Further, in many cases, a console box (container case) 6 such as a resin molded product is fastened to the back surface (back surface) of the seat back 2 with screws 7 or the like.

Here, in the seat back frame 3, the pad back surface retainer (of the seated person) is usually provided between the left and right frame portions 8a and 8a of the frame body 8 which is formed by bending one round pipe in an inverted U shape. A rear load support), a support wire (trimming wire) 9 that also serves as a load receiver from the console box 6 side, and an S-shaped spring 10 are laid around.

The support wire 9 is one horizontal bar as shown in FIG. 5, and has bent ends 9a, 9a slightly bent at both ends thereof. To attach the support wire 9 to the frame body 8, a rectangular block-shaped wire positioning jig 11 is placed at the center of a work table (not shown) on which the frame body 8 is placed. While fitting and positioning the middle portion of the support wire 9 in the groove 11a extending in the longitudinal direction, the both-side bent end portions 9a, 9a of the wire 9 are placed on the left and right frame portions 8a, 8a of the frame body 8. In this state, the left and right frame portions 8a, 8a are CO ₂ welded and fixed to the left and right frame portions 8a, 8a by the robot.

[0005]

[Problems to be solved by the device]

 By the way, in the seat back frame having the above-mentioned configuration, the support wire 9 has a simple shape having only the bent end portions 9a, 9a on both sides. Even if 9 is fitted and positioned in the groove 11a of the wire fixing jig 11, the support wire 9 is not prevented from rotating, and the both-side bent end portions 9a of the wire 9 wobble forward and backward as shown in FIG. Easy to rotate. For this reason, the clearance for welding was not constant, there were many welding errors, and there were problems such as corrections such as re-welding the support wire 9 in a later step.

Therefore, a V-shaped or U-shaped bent portion (not shown) is provided in the middle of the support wire 9 so as to fit and position the groove 11a of the wire stopping jig 11 in a non-rotating state. However, in such a case, when the bent portion is projected toward the front surface side of the seat back 2, the seated person feels a protrusion in the seat back pad 4 on the back, which causes a problem in sitting comfort. On the contrary, when the bent portion is provided so as to project toward the back surface side of the seat back 2, this causes a problem that the installation of the console box 6 is hindered by the obstacle.

The present invention has been made in view of the above circumstances, and an object thereof is to set a positioning set in a state in which the support wire is reliably prevented from rotating when welding both ends of the support wire to the left and right frame portions of the frame body. The purpose of the present invention is to provide a seat back frame that can solve problems such as defective welding and that does not cause problems such as deterioration of sitting comfort of the seated person due to the protrusions and hindrance to the mounting of the console box.

[0008]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the seat back frame of the present invention is bent and welded and fixed along the left and right frame part surfaces to both ends of a support wire which is hung and welded between the left and right frame parts of the frame body. And a welding positioning terminal portion extending from the bent portion toward the outer back surfaces of the left and right frame portions.

[0009]

[Action]

 According to the seat back frame configured as described above, when the support wire is welded and fixed to the frame body, the bent portions on both end sides are joined along the left and right frame portion surfaces, and the bent portions are connected to the left and right frame portions. If the positioning terminals for welding that extend toward the outer rear surface of the frame are inserted into the grooves of the wire-fixing jigs on the left and right, the support wires will be positioned accurately without wobbling and the frame body Since the clearance for welding to the left and right frame parts is constant, reliable welding is possible and inconveniences such as welding errors are eliminated.

Moreover, since the welding positioning terminal portion for preventing the support wire from rotating is extended toward the outer back surface of the left and right frame portions, the seated person feels a protrusion in the seat back pad on the back. It is comfortable and comfortable to sit in, and does not interfere with the installation of the console box.

[0011]

【Example】

 An embodiment of the seat back frame of the present invention will be described below with reference to FIGS. 1 and 2. First, as shown in the sectional view of FIG. 2, a seat back 20 of a vehicle seat includes a seat back frame 21, a seat back pad 22 made of a cushion material such as a foam material fitted to the seat back frame 21, and a seat back pad 22. The seat back pad 22 is covered with the outer surface of the seat back 2 and is fixed to the back surface of the seat back 2 by the hog ring 23a.

The seat back frame 21 includes a frame main body 25 formed by bending a single round pipe in an inverted U shape, a support wire 26 hung over the left and right frame portions 25 a of the frame main body 25, and the drawing. It is composed of a non-S-shaped spring. Further, a console box 27 such as a resin-integrated molded product is mounted on the back side thereof.

Here, the support wire 26 is a trimming wire that doubles as a pad back surface retainer (back load support of a seated person) and a load receiver from the console box 27 side, as shown in FIGS. A bent portion 26a made of one steel wire having a diameter of about 6 mm, and bent and welded and fixed in an arc shape along the peripheral surfaces of the left and right frame portions 25a at both ends thereof. It is configured to have a welding positioning terminal portion 26b extending toward the outer back surface of the left and right frame portions 25a.

For welding the support wire 26 to the frame body 25, as shown in FIG. 1, a pair of wire fixing jigs 28 are attached to the left and right outer portions on a work table (not shown) on which the frame body 25 is placed. Set it aside. That is, the bent portions 26a on both end sides of the support wire 26 are joined along the peripheral surface of the left and right frame portions 25a, and extended from the bent portions 26a toward the outer rear surface of the left and right frame portions 25a. The welding positioning end portions 26b are put into the grooves 28a of the left and right wire fastening jigs 28. With this, while positioning the support wire 26 in a rotation-stopped state without wobbling, both end side bent portions 26a of the wire 26 are CO ₂ welded and fixed to the left and right frame portions 25a, 25a of the frame body 25 by the welding robot. ing.

According to the seat back frame thus configured, when the support wire 26 is welded and fixed to the frame body 25, the bent portions 26a on both end sides of the wire 26 are provided along the surface of the left and right frame portions 25a. By joining the welding positioning terminal portions 26b extending from the bent portions 26a toward the outer back surfaces of the left and right frame portions 26a into the grooves 28a of the left and right wire stopping jigs 28, the support wire 2 6 is properly positioned in a rotation-prevented state without wobbling, the clearance for welding to the left and right frame portions 25a of the frame main body 25 becomes constant, and reliable welding becomes possible, and welding errors and the like are prevented. There is no inconvenience.

Moreover, since the welding positioning terminal portion 26b for preventing the support wire 26 from rotating is extended toward the outer back surface of the left and right frame portions 25a, the seated person can seat the back of the seat back pad 22 on his back. There is no protrusion inside, and it is comfortable to sit on, and does not interfere with the mounting of the console box 27.

[0017]

[Effect of the device]

 Since the seat back frame of the present invention is configured as described above, when welding both ends of the support wire to the left and right frame parts of the frame body, it is possible to position and set with the support wire securely locked. In addition, it is possible to solve problems such as poor welding, and also to solve problems such as deterioration of the sitting comfort of the seated person due to the protrusion and hindrance to the mounting of the console box.

[Brief description of drawings]

1 (a) and 1 (b) are a perspective view and a partially enlarged cross-sectional view of a partially omitted support wire welding operation showing an embodiment of a seat back frame of the present invention.

FIG. 2 is a sectional view of a seat back assembled using the seat back frame of the above embodiment.

FIG. 3 is a partially cutaway perspective view showing a conventional vehicle seat.

FIG. 4 is a sectional view of a conventional seat back.

FIG. 5 is a perspective view showing a welding operation state of a support wire of a conventional seat back frame.

FIG. 6 is a side view showing a wobbled state of a conventional support wire of a seatback frame during welding work.

[Explanation of symbols]

20 ... Seat back, 21 ... Seat back frame, 2
5 ... Frame main body, 25a ... Left and right frame portions, 26 ... Wire, 26a ... Bent portion, 26b ... Welding positioning terminal portion.

Claims (1)

[Scope of utility model registration request] 1. In a seat back frame, wherein support wires are bridged between left and right frame parts of a frame body and fixed by welding, the support wires are bent and welded and fixed to both ends of the support wire along the surfaces of the left and right frame parts. And a welding positioning terminal portion extending from the bent portion toward the outer back surfaces of the left and right frame portions.