JPH0489008A - Spring structure for seat - Google Patents

Abstract

PURPOSE:To reduce the thickness of a seat regardless of using a compression coiled spring by providing compression coiled springs which are adapted to elastically support a pad support and produce a no-spring space on the back side of a bearing surface portion of the pad support. CONSTITUTION:A spring structure 1 for a seat is constructed so that when load is applied from above a pad 15 at the time of taking a seat, the pad 15 is bent by the load, a pad support 11 is bent to some degree, and further a coiled spring 20 is bent in the direction of being compressed, whereby the bearing surface load is elastically supported. In the case of the spring structure 1, coiled springs 20 are disposed under wing portions 13, 14 of the pad support 11, and there is no spring under a bearing surface portion 12, so that the space required on the lower surface side of the bearing surface 12 side can be reduced as compared with the conventional device. Furthermore, it is possible to provide a large opening portion 7 in the center of a frame 2 so as to contribute to the simplification of the frame structure and the reduction of weight.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a spring structure for a seat, which is used, for example, as a seat portion or a backrest of an automobile seat.

[Prior Art] There is known a seat for riding in an automobile or the like in which a seating surface is elastically supported by a compression coil spring. Conventional spring structures of this type include a frame,
It is comprised of a pad and the above-mentioned coil spring provided between the pad and the frame, and the above-mentioned coil spring is disposed below the seating surface.

[Problems to be Solved by the Invention] The above-described conventional seat spring structure has a spring mounting bracket provided in the center of the frame in order to mount the coil spring, and a spring mounting bracket provided between the bracket and the pad. Contains a coil spring.

Therefore, the length of the coil spring in the axial direction (the height of the spring) directly affects the dimension of the spring structure in the thickness direction, making it difficult to reduce the thickness of the spring structure.

Accordingly, an object of the present invention is to provide a spring structure for a seat that can be made thinner by reducing the dimension in the thickness direction even though a compression coil spring is used to support the seating load.

[Means for Solving the Problems] In order to achieve the above object, the seat spring structure developed by the present inventor includes a frame having spring receiving portions on the left and right sides, and a spring structure that is provided spaced apart from and facing the frame and that A pad support body having a seat part located at the center, a pair of wing parts located on both left and right sides of the seat part and bent in a direction away from the frame, and an elastic material that is polymerized in the thickness direction of the pad support body. A plurality of pads are arranged between each wing portion of the pad support or the vicinity of the wing and each spring receiving portion of the frame to elastically support the pad support and provide a seat for the pad support. It is equipped with a compression coil spring that creates a springless space on the back side of the surface part.

[Function] In the seat spring structure of the present invention, the seating load applied to the pad acts in the direction of compressing the coil spring while bending the pad support, which exhibits a certain degree of surface rigidity, together with the pad. do. This coil spring is provided only on the back side of the wing portion of the pad support, and there is no spring between the seat surface of the pad support and the frame, so this space without springs can be used as much as possible. By making it narrower, the spring structure can be made thinner.

The spring structure of the present invention has a pad with an appropriate thickness, a pad support with surface rigidity, and a coil spring arranged on the wing part of this pad support, which work together to achieve
Demonstrates good cushioning properties.

[Example] An example of the present invention will be described below with reference to FIGS. 1 and 2.
This will be explained with reference to the figures.

The frame 2 used in the seat spring structure 1 of this embodiment has a rectangular frame shape in plan view. That is, this frame 2 includes a pair of side frames 3 and 4 located on both left and right sides, and a front frame 5 and a rear frame 6 that connect these side frames 34.
The opening 7 is provided between the side frames 3 and 4. The material of the frame 2 is metal, but fiber reinforced plastic (FRP) may be used depending on the case.

Further, a rising edge 8 is provided over the entire circumference of the frame 2, increasing the strength against bending, twisting, etc. The upper surfaces of the side frames 3 and 4 are used as spring receivers 9 and 10.

A pad support 1 is arranged above the frame 2 and facing away from each other.
1 is placed. The pad support 11 of this embodiment has a panel shape, and includes a seat portion 12 located at the center in the width direction;
Wing portions 13 located on both left and right sides of this seat surface portion 12.
It consists of 14. The seat surface portion 12 is formed into a curved shape that follows the shape of a human's buttocks when seated. The wing portions 13, 14 have a shape that projects obliquely in a direction away from the frame 2, that is, upward in this illustrated example. Suitable materials for the pad support 11 include metal or resin such as FRP, and in any case, a plate having surface rigidity and appropriate elasticity that can be bent to some extent is used.

A pad 15 having an appropriate thickness is superposed in the thickness direction of the pad support 11, that is, on the upper surface side in this illustrated example. This pad 15 is made of an elastic material such as a synthetic resin foam such as urethane foam, or a synthetic fiber bonded with a resin binder. The shape of the pad 15 is the same as that of the pad support 11.
It roughly corresponds to the shape of In other words, this pad 1
5 includes a main seat portion 16 on which the buttocks of the seated person rest, and a pair of left and right side support portions 17 and 18.

Spring receiving parts 9, 10 and wing part 1314 of frame 2
A plurality of compression coil springs 20 (four on each side in the illustrated example) are provided between the two. Each coil spring 2
0 are arranged along the longitudinal direction of the spring receiving portions 9 and 10. The coil spring 20 in the illustrated example is a conical coil spring, and the small diameter portion 22 is
They are fixed to the spring receivers 9 and 10 by suitable fixing means.

As illustrated in FIG. 2, the large diameter portion 2 of the coil spring 20
1 is supported by a spring seat 23 provided on the underside of the wing part 13.14. However, by devising the shape of the upper end of the coil spring 20, it is also possible to support the coil spring 20 on the wing portions 13, 14 without providing the spring seat 23.

The pad support 11 is elastically supported in a floating state above the frame 2 by the coil spring 20, and a spring-free space 25 is secured between the seat surface portion 12 of the pad support 11 and the frame 2. Ru.

The seat spring structure 1 configured as described above has a pad 15 when seated.
When a load is applied from above, the pad 15
is bent, and the pad support 1 is also bent to some extent, and the coil spring 20 is also bent in the direction of being compressed.
Seated loads are supported elastically.

According to the spring structure 1 of this embodiment, the coil spring 20 is arranged under the wing parts 13 and 14 of the pad support 1, and no spring is provided under the seat part 12. Therefore, the space required on the lower surface side of the seat portion 12 is smaller than that of the conventional device. Furthermore, since the large opening 7 can be provided in the center of the frame 2, it is possible to contribute to the simplification and weight reduction of the frame structure.

Note that, as shown in FIG. 3, the coil spring 20 may be embedded in a synthetic resin foam 30 such as urethane foam to improve the vibration damping performance.

FIG. 4 is an example of a pad support 31 that combines wires. The second pad support 31 is composed of an upper frame line 32 extending over the entire circumference of the bat support 31 and a plurality of rows of formed wires 33 formed in a zigzag shape, and is similar to the panel-shaped pad support [1] described above. In addition, it is designed to exhibit appropriate surface rigidity. The upper frame line 32 is made of, for example, a steel wire with a rectangular cross section. The formed wire 33 is made of, for example, a steel wire with a circular cross section, and both ends thereof are connected to the upper frame line 32.
Fixed. This pad support 31 also includes a seat portion 34 at the center in the width direction, and wing portions 35 and 36 that stand up diagonally on both sides of the seat portion 34.

In the embodiment shown in FIG. 5, a reinforcing member 40 made of rectangular wire or the like is wound around the outside of each coil spring 20. Both ends 41 and 42 of this reinforcing member 40 are fixed to the frame 2, and a longitudinally intermediate portion 43 of the reinforcing member 40 is fixed to the frame 2.
is fixed to the pad support 11 (or 31) described above. Such a configuration suppresses swinging in the lateral direction.

The compression coil springs 45 and 46 of the embodiment shown in FIG. 6 are coiled so that the cross sections in the direction orthogonal to the axes of the coil springs 45 and 46 are rectangular, respectively. For example, the dimensions AI and Bl on the long side are changed to the dimension A2 on the short side. B2
It is about 1.2 to 2 times larger than that. Coil springs 45 and 46 having such a shape have increased rigidity against bending in the direction along the long sides, so by arranging the springs as shown in the illustration, the front side part can be prevented from swinging against lateral loads. can be suppressed, and in other parts, swinging in the front-back direction can be suppressed.

In the embodiment shown in FIG. 7, a retainer 47 is attached to the coil spring 20, and the coil spring 20 is compressed in advance by the retainer 47. Therefore, the vertical dimension can be made even thinner.

It is shown in FIG. The embodiment is an example in which the conical coil spring 20 is provided diagonally. In other words, the coil spring 20 in this embodiment is set with its axis generally perpendicular to the wing portions 13, 14 of the pad support 11. For this reason, especially when applied to the front sides,
With respect to the load applied in the lateral direction of the wing portions 13° 14, the axial direction of the coil spring 20 is the input direction of the load, so
The coil spring 20 can be bent in the axial direction, which has the effect of suppressing the front side portion from swinging laterally.

9 and 10 show examples in which the conical coil spring 20 is attached to the frame 2 with its large diameter portion 21 facing downward. In this case, as shown in FIG. 10, since the small diameter portion 22 fits in the space below the wing portion 13.14, the seat surface portion 1 of the pad support 11 is Height H of the space without spring between and frame 2
, which is more effective in reducing the thickness.

Next, the embodiment shown in FIGS. 11 and 12 will be described. This illustrated example shows a spring structure 1 and skin assembly 50 for use in so-called compression coverings.

In this embodiment, the same reference numerals are given to parts common to those of the previous embodiments, and the explanation thereof will be omitted.

As shown in FIG. 11, the skin assembly 50 includes an appropriate number of compression belts 52 in left and right rows on the back side of a skin 51 sewn into a predetermined shape. This belt 5
2 is provided with a hanging bag 53 and a hook-shaped resin fastener 54. A wire 55 is inserted through the hanging bag 53. Furthermore, a hanging bag 57 and a hook-shaped resin fastener 58 are provided on the back side of both side portions 56 of the outer skin 51, respectively. A wire 59 is inserted through the hanging bag 57. The pad 15 is provided with a through hole 61 through which the belt 52 is inserted. The frame 2 is provided with hook-shaped locking portions 62.63 for hooking the fasteners 54.58.

As shown in FIG. 12, the belt 52 is passed through the through hole 61 of the pad 15, and the wire 55 is inserted through the hanging bag 53 on the back side of the pad 15.
The wire 55 is fixed to the wire 33 of the pad support 31 by a suitable fixing member such as 5 or the like. In addition, both side portions 5
The wire 59 inserted into the hanging bag 57 of No.
1 to the upper frame line 32. The belt 52 is passed between the wires 33 and pulled out downward. Then, with the side portion 56 of the outer skin 51 and the belt 52 pulled, the fastener 54.
58 on the locking portions 62 and 63 of the frame 2. By doing so, compression covering can be performed without impairing the external shape (seat shape).

Incidentally, FIG. 13 shows compression covering when the above-mentioned panel-shaped pad support 11 (see FIG. 1) is used. In this case, the wire 59 is fixed to the pad support 11 by passing the C-ring 66 through a locking portion 70 such as a hole provided at the edge of the pad support 11 . epidermis 51
The fastener 58 provided at the lower end of the side portion 56 is attached to a hook-shaped locking portion 63 provided at the end of the frame 2.
Hook it on and fix it.

The coil spring 20 also has wing portions 13, 14 (35,
36) and the frame 2.

[Effects of the Invention] According to the seat spring structure of the present invention, although a compression coil spring is used to support the seating load, only a small space is required on the back side of the pad, and the seat can be made thinner.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a spring structure for a seat showing an embodiment of the present invention, Fig. 2 is a cross-sectional view of the spring structure shown in Fig. 1, and Fig. 3 shows a coil spring made of resin foam. Fig. 4 is a perspective view showing a modified example of the pad support, Fig. 5 is a perspective view of a spring structure that takes measures to suppress horizontal vibration, and Fig. 6 is formed into a rectangular shape. 7 is a perspective view of an example in which a compressed coil spring is attached to a frame, FIG. 8 is a sectional view showing an example in which a coil spring is installed diagonally, and FIG. Figure 9 is a perspective view showing an example in which a coil spring is installed with the small diameter portion facing upward, and Figure 10 is a perspective view showing an example in which the coil spring is installed with the small diameter portion facing upward.
11 is a perspective view of the spring structure for compression covering and the outer skin, and FIG. 12 is a cross-sectional view of the spring structure using the coil spring shown in FIG. FIG. 13 is a cross-sectional view showing a part of the assembled state, and FIG. 13 is a cross-sectional view showing another example of the compression covering spring structure. 1... Spring structure for seat, 2... Frame, 9°1
0... Spring receiving portion, 11... Pad support, 12...
...Seat part, 13.14...Wing part, 15...
Bat, 20... Coil spring, 25... Springless space, 31... Pad support, 34... Seat part, 35
．． 36...Wing part, 45.46...Coil spring. 1IFI2 Tuguan 3ra District 4 District 5 District 6 Figure 7! l Figure 9 @

Claims (1)

[Scope of Claims] A frame having spring receiving portions on the left and right sides, a seat portion provided facing away from the frame and located at the center in the width direction, and a seat portion located on both left and right sides of the seat portion in a direction away from the frame. a pad support having a pair of wing parts that bend in a direction, a pad made of an elastic material that is polymerized in the thickness direction of the pad support, and each wing part or the vicinity of the wing part of the pad support and each spring receiver of the frame. A plurality of compression coil springs are arranged between the pad support and the pad support to elastically support the pad support and create a spring-free space on the back side of the seat surface of the pad support. Spring structure for seats.