JP2002523199A - Seat suspension assembly - Google Patents

Abstract

(57) Abstract: A seat suspension assembly for supporting a cushion body, for example, incorporated in a seat frame of an automobile, comprising: a base frame having a side wire (1); Between (1), transverse wires (2) are provided to form a grid. The base frame is suspended from the seat frame by a spring unit comprising a transverse intermediate wire (4) integrally formed with a tension spring (5). A curved portion (6) is formed between the transverse intermediate wire (4) and the tension spring (5) at a position corresponding to the side wire (1), and the curved portion (6) is formed by the side wire (1). ) To hold the tension spring (5) outside the base frame. In this way, the tension springs can be locked to the seat frame with less effort than in the prior art in which a plurality of tension springs are used to engage with each side wire (1).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD OF THE INVENTION

The present invention relates to a suspension assembly used for seats and other furniture for elastically supporting a cushion body covering a frame.

[0002]

[Prior art]

In the manufacture of automotive seats, it is known to use an elastic base frame assembly suspended from a metal frame of the seat by a tension spring.

[0003] A particularly preferred construction uses a wire grid-like base with two spaced apart thick side wires, coated with a synthetic plastic material or wrapped with paper. Thin lateral wires for supporting the cushion body are suspended side by side between the side wires.

[0004] In use, a tension spring is tensioned between the side wires and the seat frame to tension the transverse wires. As is known in the prior art, the transverse wires are elastically connected to the side wires as appropriate.

[0005] In producing a seat with such a suspension assembly, the manufacturer is supplied with a subunit comprising a base frame and a tension spring. Also, the tension spring is pre-assembled at an appropriate position on the side wire.

When manufacturing seats, the operator removes the suspension assembly from the stock supply and attaches the free end of a tension spring on one side of the base frame to the corresponding end provided on one side of the seat frame. All that is required is to engage the catch and extend the remaining tension spring to engage the catch on the other side of the seat frame.

A skilled worker can assemble a sheet well in a short time. Of the total time required to attach each suspension assembly to the seat, most of the time
Spent by hand selecting suspension assemblies from stock supplies.

[0008] When an assembly including a base frame and a tension spring whose end is locked is stored, for example, in a pile, the suspension spring easily shifts from the correct position or entangles with another assembly. In such a case, the tension springs must be removed and they must be mounted in the correct position on the seat, wasting time.

[0009] It is, therefore, an object of the present invention to provide an improved suspension assembly so that it can be quickly mounted in the correct position when manufacturing a sheet.

In accordance with the present invention, a seat suspension assembly including a base frame having two spaced side wires is integrally formed with a transverse wire shaped to be assembled to the side wires of the base frame. A spring suspension unit having a pair of tension springs is provided.

Instead of the two opposing tension springs of the conventional construction attached to each side wire of the base frame, a single transverse wire is used in which the part engaging the side wire is integrally formed. .

[0012] With this structure, when the suspension assembly is stored as a subunit, the two opposing tension springs do not swing with respect to the base frame as in the conventional case, and the tension spring does not move in the plane of the base frame. Is obtained. Therefore, such subunits can be easily stacked on a production line without entanglement,
And can be stored. Also, the spring as an assembly can be easily attached to the seat frame.

Next, an embodiment of the present invention will be described with reference to the drawings.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 is a schematic illustration of a base frame or pad with two side wires (1) wound on paper or coated with plastic. As is known, between the side wires (1), (1) are arranged a plurality of transverse wires (2), the ends of which are locked to the side wires (2) to form a grid. Have been.

[0015] In the conventional structure, the transverse wires (2) are separated at substantially regular intervals, and the base frame is attached to the seat frame by a plurality of tension springs suspended between the side wires (1) and the seat frame. Had been fixed.

On the other hand, in the structure according to the present invention, the transverse wire (2) is selectively thinned out from the base frame, and the portion where the tension spring is conventionally locked to the side wire (1) is a space ( 3). Although only one is shown in FIG. 1, in this space (3) the transverse wire (2) extends beyond the side wire (1) and the tension spring (5) is integrally formed. Is replaced by a horizontal intermediate wire (4).

FIG. 2 shows in detail a spring-loaded wire (7) with a transverse intermediate wire (4) and a tension spring (5). Lateral wire (
At the position corresponding to 1), two curved portions (6) and (6) are formed.

In order to manufacture such a sheet suspension assembly, first, as in the prior art, a lateral wire (2) is wrapped around the outer periphery of a paper or plastic sheath of the side wire (1).
) To assemble a base frame or pad with lateral wires (1) and lateral wires (2). This only requires altering the normal manufacturing process so that a space (3) is formed at the appropriate position between adjacent transverse wires (2).

Next, the curved portion (6) of the spring-loaded wire (7) as shown in FIG. 2 is moved to the side wire (1) in the space (3) formed by thinning out the transverse wires (2). ), The transverse intermediate wire (4) is attached.

With such a structure, the base frame and the tension spring incorporated therein become a stable unit, can be easily stored and stored, and can be easily manufactured when manufacturing the sheet. , Can be incorporated into the seat frame.

When incorporated in the seat, the tension spring (5) causes the cushion body of the seat to:
It can move to the side of the spring-loaded wire (7) of FIG. In addition, when the sheet is weighted, the base frame moves not in a direction away from the curved portion (6) but in a direction in which the base frame is fitted. If this structure is reversed, the weight on the seat will cause the side wires (1) to disengage from the spring-loaded wires (7).

Various modifications can be made to the structure described above.

In FIG. 1, the diameter of the transverse wire (2) is shown as being slightly smaller than that of the intermediate transverse wire (4), but the transverse wire (2) is made thicker,
The uniform production of the base frame may be enhanced.

Further, the transverse intermediate wire (4) of the spring member does not have to be straight. For example, the transverse intermediate wire (4) may be bent away from the base frame supporting the cushion body so as not to form a prominent ridge on the cushion body of the seat.

When the horizontal intermediate wire (4) is provided by the base frame in the space (3) formed by thinning the horizontal wires (2) as described above, a wider space as shown in FIG. 1 is obtained. The cushion body is supported over the space (3).

As shown in the embodiments described above, the structure of the present invention can provide a single unit that can be easily incorporated into a seat frame. On the other hand, in the conventional structure, when separate tension springs are provided, nine separate members are required.

[Brief description of the drawings]

FIG. 1 is a schematic view of a base frame having a spring-loaded wire member formed according to the present invention.

FIG. 2 is a schematic view of a spring-loaded wire incorporated into the suspension assembly shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Side wire 2 Lateral wire 3 Space 4 Lateral intermediate wire 5 Tension spring 6 Bending part 7 Spring-loaded wire

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Claims (9)

[Claims] 1. A base frame that supports a cushion body of a seat is shaped so as to be fitted to two separated side wires suspended from a seat frame and side wires of the base frame. At least one spring-loaded wire having a pair of tension springs separated by portions, and each of the tension springs outwardly from the side wire so that they can be locked to a seat frame. A seat suspension assembly in which the spring-loaded wires are protruded and provided laterally between side wires. 2. The seat suspension assembly according to claim 1, wherein a plurality of the spring-loaded wires are provided on the base frame. 3. The spring-loaded wire according to claim 1, wherein two bent portions separated by the same distance as the side wire and having a size to be fitted to the side wire are formed on the spring-loaded wire. Seat suspension assembly. 4. The seat suspension assembly according to claim 1, wherein the base frame and the spring-loaded wire are incorporated as a common unit. 5. A base frame comprising a wire grid having a plurality of spaced apart lateral wires extending between said lateral wires, wherein each spring-loaded wire is connected to said lateral wire between two adjacent lateral wires. The seat suspension assembly according to claim 4, wherein the seat suspension assembly is fitted and locked with a wire. 6. The seat suspension assembly according to claim 5, wherein a distance between two adjacent lateral wires is larger than a distance between other lateral wires. 7. The seat suspension assembly according to claim 5, wherein the side wire is provided with a sheath made of paper or synthetic plastic. 8. The seat suspension assembly according to claim 5, wherein the diameter of the transverse wire is smaller than that of the spring-loaded wire. 9. The seat suspension assembly according to claim 8, wherein the intermediate wire in the spring-loaded wire is bent from the base frame.