JPH0629454U - Vehicle seat frame structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a reasonable and economical vehicle frame structure for a vehicle. [Structure] In a frame 1 of a vehicle seat, the frame 1 is formed by punching a single plate-shaped panel 2a punched into a predetermined shape so that the outer peripheral side is wound into a substantially pipe-shaped cross section to integrally form a continuous frame. Together with the pipe-shaped portion 3
The winding diameters v, w, and x are set according to the frame structure portion.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a frame structure for a vehicle seat, and more particularly to a frame structure for a vehicle seat that can simplify manufacturing of a frame including a frame and a panel.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, as shown in FIG. 7, there is a so-called foldable rear seat back 22 that can be tilted forward as a seat back of a vehicle rear seat. In this seat back 22, the back surface of the seat back 22 is formed so as to be continuously usable on the floor of the luggage compartment at the rear of the vehicle. Therefore, a frame 23 having a flat surface is provided on the back surface of the seat back 22 so that it can be used as a floor for a luggage compartment.

A typical frame structure of such a retractable rear seat back 22 is shown in FIG. The frame 23 is formed by fixing a panel 25, which substantially corresponds to the outer peripheral shape of the frame, to a substantially rectangular pipe 24 corresponding to almost the entire circumference of the seat back 22 by welding or the like. The reason for adopting such a panel structure is that the back surface of the seat back 22 is used as the floor of the luggage compartment, so that it is necessary to maintain the planar shape. The overall shape and thickness of the pipe 24 are set on the basis of ensuring the strength at the left and right lower portions of the pipe 24 where the moment is the largest.

[0004]

[Problems to be solved by the device]

 However, since the frame 23 has the structure including the panel 25 and the pipe 24 as described above, the number of the manufacturing processes including the molding process of the pipe 24, the molding process of the panel 25, the joining process of the pipe 24 and the panel 25 is increased, Production efficiency is poor, leading to higher costs. Further, even if the strength of the panel 25 and the pipe 24 is partially required, the rear seat back 22 as a whole is not necessarily required, and the material is wasted. For this reason, it has been desired to improve the structure of the frame 23 so as to secure the necessary strength and improve the production efficiency. Furthermore, the work of attaching the cushion body and the seat cover to the frame 22 must be performed with good workability, safety, and without damaging the members. Therefore, an object of the present invention is to provide a reasonable and economical seat frame structure for a vehicle seat. A further object of the present invention is to provide a seat frame structure for a vehicle seat that can be installed without damaging the pad or seat cover.

[0005]

[Means for Solving the Problems]

 As a technical means for solving the above problems, according to the present invention of claim 1, in a frame of a vehicle seat, the frame has a substantially pipe-shaped cross-section on the outer peripheral side of a single plate panel punched into a predetermined shape. The frame structure of the vehicle seat has a structure in which a continuous frame is integrally formed by being wound around the pipe and the winding diameter of the pipe-shaped portion is set according to the frame structure portion. Further, as a technical means for solving the above-mentioned problems, in the invention of claim 2, in the present invention, it is formed so as to be directed toward the center side of the single plate-shaped panel at the corner portion of the frame. The frame structure of a vehicle seat according to claim 1 is configured so as to have a concave portion at an edge thereof.

[0006]

[Action]

 According to the invention of claim 1, a pipe-shaped frame can be integrally formed on the outer periphery of the panel by curling, and the winding diameter is set according to the strength required in the structural portion of the frame. be able to. Further, according to the invention of the second aspect, it is possible to facilitate the formation of the rolled-in corner portion of the frame, and the edge of the rolled-up portion does not project.

[0007]

【Example】

 [Embodiment 1] An embodiment in which the invention of claim 1 is embodied in a back frame of a retractable rear seat will be described below with reference to FIGS. 1 to 4. FIG. 1 shows a perspective view of a frame 1 of the present invention. The frame 1 is formed of a single plate-shaped panel 2a formed by punching into a predetermined shape.

A convex portion 2 having a predetermined shape is formed by pressing at the center of the panel 2a. This convex portion 2 is formed in a convex shape having a small thickness in the direction toward the occupant when it is fitted into the cushion body. In this example, four convex portions 2 having substantially the same shape are formed vertically and horizontally, and the cross section thereof is formed as shown in FIG. Further, as shown in (a) of FIGS. 1 and 2, a flat portion is formed between the convex portions 2.

The outer peripheral side of the panel 2a on which the convex portion 2 is formed is formed into a continuous pipe shape by curling over the entire circumference. As shown in FIG. 1, the pipe-shaped portion 3 has different pipe diameters depending on its forming portion. That is, the vicinity of the upper frame 3a of the frame 1 is formed in a pipe shape having a predetermined diameter v. The upper frame 3a does not require as much strength as the left and right frames 3b described later. In addition, as shown in FIG. 2A, the left and right frames 3b of the frame 1 are formed so that the diameter gradually increases from the upper part to the lower part. That is, in the cross section shown in FIG. 2 (a), it is formed in a pipe shape having a diameter w larger than the diameter v of the upper frame 3a, and the required strength is secured near the center of the left and right frames 3a. . Further, in the cross section shown in FIG. 2B, the pipe is formed with a larger diameter x. The lower parts of the left and right frames 3b are the parts to which the most load is applied when the seat back is tilted or used as the floor of the luggage compartment, and the pipe diameter x is formed to be large in order to secure the strength required in these parts. Has been done. The lower frame 3c of the frame 1 is formed in a pipe shape having a diameter substantially similar to that of the upper frame 3a.

The formation of the pipe-shaped portion 3 by such a curling process is performed by winding the outer periphery of the panel 2a inward and bringing the rolled edge 4 close to the panel 2a so as to come into contact with the panel 2a. (See FIGS. 2A and 2B). Such a pipe shape can be easily increased in strength by increasing the diameter, and if the welded edge 4 is welded to the panel 2a at several places to provide the welded portion 4A, the pipe shape can be obtained. The elastic deformation of the portion 3 is limited, and the strength can be further enhanced (see FIG. 3). The cross-sectional shape of the pipe-shaped portion 3 is not limited to a circular shape, and may be a quadrangular shape, a triangular shape, or the like, which can be appropriately selected according to the required strength and other requirements.

As described above, the frame 1 in which the entire outer peripheral portion of the panel 2a is continuously pipe-shaped, and the convex portion 2 is formed in the central portion surrounded by the pipe-shaped portion 3 is the rear seat back as a whole. It has a substantially rectangular shape that can be built into the cushion body. The outer dimensions of the frame 1 are almost the same as those of the conventional panel.

Now, the function and effect of integrally molding the frame 1 in this way will be described. First, unlike the conventional case, the pipe-shaped portions 3a, 3b, 3c are formed from a predetermined outer periphery of one panel 2a having a predetermined shape instead of the two-body structure of the pipe-shaped frame and the panel, and the shape different depending on the forming portion. It has a pipe-shaped portion 3 and its central portion is formed into a substantially flat frame 1. That is, by pressing the convex portion 2 on the central portion of the panel 2a and curling the predetermined outer peripheral side, the integrated frame 1 can be formed at a stretch.

Therefore, since the integrated frame 1 can be formed by a series of pressing process and curling process, manual work such as fine welding can be omitted and work efficiency can be improved. The frame 1 has the same function as the conventional frame, and the strength of the pipe-shaped portion 3 can be freely adjusted by designing the shape of the panel 2a to have an optimum cross-sectional shape to secure the strength that is different for each part. Can be secured. Therefore, efficient strength can be secured and there is no waste of material. Further, there is no need for welding and the like, and the weight can be reduced.

Further, even if wrinkles occur in the corner portion 5 due to the curling process, since the frame 1 is contained in the cushion body, there is no influence on the riding comfort and usability of the floor of the luggage compartment and the like. As shown in FIGS. 4 (a) and 4 (b), in order to minimize the occurrence of wrinkles, notches may be formed in the corner portion 5 of the panel 2a to the extent that strength can be secured. Further, unlike the conventional case, by integrally forming the pipe-shaped portion 3 and the panel 2a, it is possible to always provide the frame 1 having a uniform strength and shape, so that the quality of the frame 1 is stabilized.

As shown in FIG. 4 (a), the frame 1 is provided with a welding margin 4B at an appropriate position on the edge of the rolled pipe-shaped portion 3, and the welding margin 4B is welded to the panel 2a. Can easily improve the strength. Welding strength adjustments can be made as needed.

Second Embodiment Next, an embodiment in which the invention according to claim 2 is embodied will be described with reference to FIGS. 5 and 6. As shown in FIG. 5, the frame 11 of the present embodiment is the same as the panel frame 1 of the first embodiment except for the corner portion 5 of the pipe-shaped portion 3. Therefore, hereinafter, the same reference numerals as those in the first embodiment are used unless otherwise necessary.

In this embodiment, as a result of forming the concave portion 13 in which the winding end edge 4 in the corner portion 5 of the frame 11 is partially cut, it becomes uneven. That is, three concave portions 13 are formed at a predetermined interval, and the concave portion 13 and a portion that is not a concave portion (hereinafter, simply referred to as a convex portion 14) are formed. As shown in FIG. 6A, the cross section of the convex portion 14 (see line I-I in FIG. 5) is formed into a substantially pipe shape, and its edge 4 abuts the surface of the panel 2a. It has reached the position where it does.

On the other hand, the cross section of the concave portion 13 (see line II-II in FIG. 5) is similar to the convex portion 14 although it is not wound like the convex portion 14 as shown in FIG. 6B. The end edge 4 is positioned so as to form a substantially semicircular shape with a winding diameter. Therefore, the edge 4 of the panel 2a in the corner portion 5 is exposed in the recess 13, but the edge 4 is in a state of being directed toward the inside of the recess 13. Further, the outermost end edge 4 is wound so that it is not located at the outermost periphery of the frame 11 but is located inside the frame 11.

In this frame 11, by forming the corner portion 5 in this manner, the following effect is obtained in addition to the function and effect of the first embodiment. First, since the edge 4 of the panel 2a is exposed only in the small concave portion 13, when the frame 11 is mounted on the cushion body, the edge 4 does not damage the cushion body or the seat cover, and the operator takes it. Since the work can be performed without paying attention to the edge 4, the mounting work can be performed efficiently. Further, the worker can also safely hold the frame 11. Even after mounting, even if a load from the cushion body side by an occupant or a load from the back side of the panel 2a when the seatback is tilted and used is applied, the load is supported by the cross-sectional pipe-shaped convex portion 14. Since the cushion body does not bite into the concave portion 13, the edge 4 does not damage the cushion body.

Since the convex portion 14 maintains the pipe shape also in the corner portion 5, the rigidity and the feeling of use in such a portion are maintained or improved. Further, the back surface side of the cushion body attached to the frame 11 is formed in conformity with the shape of the frame 11, but the cushion body portion corresponding to the corner portion 5 and other straight portions is formed in substantially the same shape. This simplifies the mold shape.

Although the first and second embodiments have been described with respect to the frames 1 and 11 of the retractable rear seat back of the vehicle seat, the present invention is not limited to this. For example, it can be applied to a non-foldable seat back or a frame of a normal seat cushion. Even in this case, by designing the optimum shape according to the required strength that differs for each part, it is possible to eliminate waste of material and change to an efficient production process. In addition, workability can be similarly improved.

[0022]

[Effect of device]

 As described above, according to the present invention, it is possible to form a seat frame of a vehicle seat into a structure of a single plate having a predetermined shape and including a pipe-shaped portion and a flat-plate portion. Therefore, the production process can be simplified, the required strength can be sufficiently secured, and a frame structure that is economically and functionally excellent can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a frame according to a first exemplary embodiment.

2 is a sectional view taken along the line aa of the frame shown in FIG. 1 and FIG.
It is the figure which combined the line sectional view.

FIG. 3 is a view showing a reinforced structure by welding a pipe-shaped portion.

FIG. 4 is a diagram showing another structure of a corner portion of a frame.

FIG. 5 is a perspective view of a frame according to a second exemplary embodiment.

FIG. 6 is a view showing a cross section taken along line I-I and a cross section taken along line II-II of FIG. 5.

FIG. 7 is a perspective view of a retractable rear seat back.

FIG. 8 is a view showing a combination of a partial sectional perspective view and a sectional view showing a conventional structure of a frame for a foldable rear seat back.

[Explanation of symbols]

 1, 11 ... Frame 2a ... Panel 3 ... Pipe-shaped portion 4 ... Edges v, w, x ... Rolling diameter

Claims (2)

[Scope of utility model registration request] 1. A frame for a vehicle seat, wherein the frame is integrally formed with a continuous plate by punching a single plate-shaped panel punched into a predetermined shape and winding the outer peripheral side of the panel into a pipe shape. The frame structure of a vehicle seat configured such that the winding diameter of the pipe-shaped portion is set according to the frame structure portion. 2. The frame structure for a vehicle seat according to claim 1, wherein a corner portion of the frame has a concave portion at an edge formed by being wound toward the center of the single plate panel.