JP3537402B2 - Spring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a spring device used for a cushion device such as a mattress.

[0002]

2. Description of the Related Art A spring device used for a cushion device such as a mattress arranges a large number of coil springs in a matrix, and connects an upper end surface and a lower end surface of an adjacent coil spring with a helical spring along a predetermined direction. By doing so, many coil springs are integrated.

[0003] A cushion material such as a sheet-like urethane foam is laminated on the upper and lower surfaces of the spring device, and the laminated body is covered with an exterior material to constitute the mattress used for a bed, for example.

[0004] When the user lies on the mattress, the coil spring of the spring device is compressed and deformed in the axial direction according to the load of the user, thereby providing the user with comfortable cushioning performance.

[0005]

The coil spring constituting the spring device has the upper end face formed at the upper end of the spring portion and the lower end face formed at the lower end. By connecting the upper end surface and the lower end surface of the coil springs arranged in a matrix with a helical spring, and further connecting the frame lines to the entire periphery of the spring device having a rectangular planar shape, a large number of coils are formed. The spring will be integrated.

However, the helical springs and frame lines only integrate the upper and lower surfaces of a large number of coil springs, and the spring portions of each coil spring are not connected to the spring portions of other coil springs at all.

For this reason, the upper and lower surfaces of the spring device are integrated to obtain a flat state in which the spring device is not largely dropped. Sometimes he rolled.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a spring device capable of reliably reducing the roll with a simple structure.

[0009]

According to a first aspect of the present invention, a plurality of coil springs are arranged in a matrix, and a top surface and a bottom surface of adjacent coil springs are connected along a predetermined direction by a helical spring. In a spring device having a rectangular shape, a reinforcing member having a plate-shaped portion made of an elastic material and curved portions integrally formed at both ends of the plate-shaped portion is provided, and the reinforcing member moves a pair of curved portions in a predetermined direction. The spring device is provided so as to be elastically engaged with the outer periphery of a pair of coil springs along the spring device.

According to a second aspect of the present invention, the coil spring has an upper end surface, a lower end surface, and a spring portion formed between the upper end surface and the lower end surface. 2. The spring device according to claim 1, wherein the spring device is formed to have substantially the same diameter over the entire length in the vertical direction.

According to a third aspect of the present invention, the coil spring has an upper end surface, a lower end surface, and a spring portion formed between the upper end surface and the lower end surface. 3. The spring device according to claim 1, wherein the spring device is formed to have a smaller diameter than the upper end surface and the lower end surface so as to be sandwiched between the upper end surface and the lower end surface of the spring device.

According to a fourth aspect of the present invention, the reinforcing member is provided on a peripheral portion of the spring device along a direction perpendicular to an outer peripheral surface of the spring device. In the spring device.

According to the present invention, the pair of curved portions of the reinforcing member are elastically engaged with the outer peripheral surfaces of the pair of coil springs, so that the coil springs are reinforced by the curved portions in the transverse direction intersecting the axis. Therefore, the roll of the spring device can be suppressed.

[0014]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a mattress 1 in which a spring device 2 of the present invention is used. This spring device 2 has a large number of coil springs 3 arranged in a matrix as shown in FIG.

As shown in FIGS. 3 and 6, the coil spring 3 has an upper end face 3a, a lower end face 3b, and an upper end face 3b.
a and a spring portion 3c provided between the lower end surface 3b and the lower end surface 3b are integrally formed by one wire. A pair of U-shaped protrusions 3d protruding outward in the radial direction are formed on the upper end surface 3a and the lower end surface 3b, and the spring portion 3c is formed in a straight shape having the same outer diameter over the entire length. .

As shown in FIG. 2, FIG. 5, or FIG. 6, the upper end face 3a and the lower end face 3b of the coil spring 3 adjacent in the longitudinal direction of the spring device 2 are respectively provided along the width direction of the spring unit 2. Are connected by a helical spring 4.

That is, as shown in FIG. 5, the adjacent coil springs 4 are arranged so that the projecting portions 3d overlap each other, and the overlapping portions of the projecting portions 3d are joined by the helical spring 4. I have.

As a result, the upper end face 3a and the lower end face 3b of each coil spring 3 connected by the helical spring 4 swing in the radial direction with the connected fulcrum serving as a fulcrum since the connected projection 3d exhibits a hinge action. It is possible to move.

Further, a frame line 5 is provided around the entire periphery of the upper and lower surfaces of the spring device 2 as shown in FIGS. 2 and 5, and a clip 6 (shown in FIG. 5) It is connected to the upper end surface 3a and the lower end surface 3b of the coil spring 3 located.

In the spring device 2, a plurality of reinforcing members 11 are provided at appropriate positions. That is, the plurality of reinforcing members 11 are provided with their longitudinal directions orthogonal to the outer peripheral surface of the spring device 2 as described later. In this embodiment, three reinforcing members 11 are provided at both ends in the width direction of the spring device 2, and two reinforcing members are provided at both ends in the longitudinal direction. That is, a total of ten are provided.

A sheet-like elastic member is laminated on the upper surface and the lower surface of the spring device 2 provided with the reinforcing member 11 via a protective layer such as a sisal (not shown). Shown).

The reinforcing member 11 is formed of a semi-rigid elastic material such as low foamed polyethylene, urethane foam having a skin layer, or rubber as shown in FIGS. That is, the reinforcing member 11 includes the plate-shaped portion 1.
2 and a curved portion 1 integrally formed at both ends of the plate portion 12
3

The length of the plate-like portion 12 is set slightly shorter than the dimension along the radial direction of the three coil springs 3 arranged in a matrix, and the bending portion 13 is formed as shown in FIG. The tip is formed so as to approach the inner surface of the plate-like portion 12. Further, as shown in FIG. 6, the height dimension of the reinforcing member 11 is set substantially equal to the distance between the upper end face 3a and the lower end face 3b of the coil spring 3.

The reinforcing member 11 is a spring portion 3c of a pair of coil springs 3 located at both ends in the juxtaposition direction of the three coil springs 3 juxtaposed in a predetermined direction.
And the inner surface of the curved portion 13 is elastically engaged with the outer surface of the coil spring 3 so that the upper and lower end surfaces of the curved portion 13 and the plate-shaped portion 12 are located between the upper end surface 3a and the lower end surface 3b of the coil spring 3. It is provided in such a manner as to be inserted and engaged with these end faces 3a and 3b.

The reinforcing member 11 is provided in the spring device 2.
Helical spring 4 and frame line 5
After the connection, the coil spring 3 can be inserted into the gap between the adjacent coil springs 3 and mounted in the above-described state.

The curved portion 13 of the reinforcing member 11 mounted on the coil spring 3 is elastically deformed from a state shown by a solid line in FIG. 4 to a state shown by a chain line. Therefore, the pair of curved portions 13 are pressed against the outer peripheral surfaces of the spring portions 3c of the pair of coil springs 3 by a restoring force that attempts to return to the state shown by the solid line. Moreover, since the spring portion 3c is formed in a straight shape having substantially the same diameter over the entire length in the axial direction,
The inner surface of the curved portion 13 is securely adhered over substantially the entire axial length of the outer peripheral surface.

The spring portion 3c of the pair of coil springs 3
The inner surfaces of the pair of curved portions 13 of the reinforcing member 11 are pressed against each other in close contact with each other, and the upper and lower end surfaces of the reinforcing member 11 are located between the upper end surface 3a and the lower end surface 3b of the coil spring 3 so that these end surfaces 3a , 3b, the reinforcing member 11
Is integrated with the pair of coil springs 3 to reinforce the coil springs 3.

That is, since the curved portion 13 of the reinforcing member 11 holds the spring portion 3c of the coil spring 3, the spring portion 3c of the pair of coil springs 3 is prevented from swinging in the lateral direction. Since the pair of curved portions 13 are integrated by the plate-shaped portion 12, the effect of preventing the pair of curved portions 13 held by the reinforcing member 11 from swaying in the horizontal direction is also increased.

The plurality of reinforcing members 11 are provided so that their longitudinal directions extend along the direction perpendicular to the outer peripheral surface of the spring device 2. Therefore, the reinforcing member 11 provided along the width direction of the spring device 2 prevents the spring device 2 from swinging in the width direction, and the reinforcing member 11 provided along the longitudinal direction allows the spring device 2 to move in the longitudinal direction. Prevent shaking along. That is, the spring device 2
Is less likely to swing in both the width direction and the longitudinal direction orthogonal to the width direction.

The pair of curved portions 13 and plate-like portions 12 of the reinforcing member 11 are connected to the upper end surface 3a and the lower end surface 3b of the coil spring 2.
And intervenes between them. Therefore, the three coil springs 3 held by the reinforcing member 11
, The amount of compressive deformation when receiving a load is reduced. That is, the coil spring 3 becomes hard. Therefore, by providing the reinforcing member 11 at the peripheral portion of the spring device 2, the hardness of the peripheral portion can be improved, and the effective use area of the spring device 2 can be increased.

The present invention is not limited to the above embodiment. For example, in the above-described embodiment, the length of the reinforcing member can hold three coil springs, but the length is a length that can hold two or four or more coil springs. You may.

Further, the number and position of the reinforcing members provided in the spring device are not limited at all, and the case where the spring portion is a straight coil spring has been described.

[0034]

As described above, according to the present invention, the reinforcing member in which the curved portions are integrally formed at both ends of the plate-like portion is elastically connected to the outer peripheral surfaces of the pair of coil springs. The spring device is provided together.

[0035] Therefore, since the strength of the coil spring in the transverse direction intersecting the axis is reinforced by the curved portion, the roll of the spring device can be suppressed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a mattress in which a part of an exterior body according to an embodiment of the present invention is broken.

FIG. 2 is a plan view of a spring device.

FIG. 3 is a perspective view showing a state where a reinforcing member is mounted on a coil spring.

FIG. 4 is a plan view of a reinforcing member.

FIG. 5 is an enlarged plan view of a portion of the spring device on which a reinforcing member is mounted.

FIG. 6 is an enlarged side view of a portion of the spring device on which a reinforcing member is mounted.

[Explanation of symbols] 3 ... Coil spring 3a: Upper end surface 3b ... lower end face 3c ... spring part 4. Helical spring 11 ... reinforcement member 12 ... plate-shaped part 13 ... Bending part

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) A47C 27/04 A47C 27/07 A47C 27/20

Claims (4)

(57) [Claims] 1. A spring device in which a large number of coil springs are arranged in a matrix, and the upper end surface and the lower end surface of adjacent coil springs are connected along a predetermined direction by a helical spring. A reinforcing member having a plate-shaped portion and curved portions integrally formed at both ends of the plate-shaped portion. The reinforcing member elastically couples the pair of curved portions to the outer periphery of a pair of coil springs along a predetermined direction. A spring device provided in engagement. 2. The coil spring has an upper end surface, a lower end surface, and a spring portion formed therebetween, and the spring portion has a total length in the vertical direction such that the inner surface of the curved portion is in close contact with the outer peripheral surface. 2. The spring device according to claim 1, wherein the spring device is formed to have substantially the same diameter over the entire length. 3. The coil spring has an upper end surface, a lower end surface, and a spring portion formed therebetween, and the upper and lower end surfaces of the reinforcing member are lower than the upper end surface of the coil spring. The spring device according to claim 1, wherein the spring device is formed to have a smaller diameter than the upper end surface and the lower end surface so as to be sandwiched between the end surfaces. 4. The spring device according to claim 1, wherein the reinforcing member is provided at a peripheral portion of the spring device along a direction orthogonal to an outer peripheral surface of the spring device.