JP3156046B2 - Spring structure for mattress - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mattress spring structure made of synthetic resin.

[0002]

2. Description of the Related Art Mattresses used for bedding such as beds have a large number of metal coil springs and torsion bars, etc., which are uniformly distributed over the entire floor surface and which are adjacent to each other at upper and lower edges. And a spring whose outer peripheral edge is surrounded by a wire or the like. Such a spring generally has a complicated structure and poor productivity, and is heavy in weight and requires a great deal of labor for handling during transportation, etc., as well as generation of rust and alignment with a fiber material portion such as side ground. There were problems such as poor sex.

Therefore, as a substitute for a conventional metal spring, a plastic spring having a light weight and good productivity is being developed. In the case of this plastic spring, the same molding as other plastic products is performed. Because technology can be used, springs with completely different shapes can be formed, and even if a spring for mattress is composed of many springs alone, a structure that can obtain the advantages of materials and manufacturing technology will be desired. Was.

[0004]

SUMMARY OF THE INVENTION In view of the above problems of the prior art, the present invention is lightweight, easy to handle, has good consistency with the fiber material portion such as side lining, and has good productivity. It is intended to obtain a certain mattress spring structure.

[0005]

The present invention comprises a plurality of springs and a pair of upper and lower net-like planar members interconnecting the upper and lower ends of each spring. Each of the springs is entirely made of a synthetic resin material. A plurality of annular members formed integrally, arranged at appropriate intervals and having the same axis and arranged in parallel, and an elastic connecting member for connecting the annular members to each other at a plurality of locations, the elastic connecting member The net-shaped flat member is disposed integrally along a virtual cylindrical surface formed by the respective annular members and curved in the circumferential direction of the annular member. Formed in a net shape in which an annular body corresponding to the upper or lower annular member of each of the springs is planarly connected, and the upper or lower annular member of each of the springs can be locked. A plurality of locking members are arranged at appropriate intervals in the circumferential direction of each annular body, and each spring is connected to the upper and lower nets so as to be held between the layers of the pair of upper and lower net-shaped planar members. Each of the flat members was locked and integrated. In each of the springs, the diameter of the annular member is made different between the vertically adjacent annular members, and one end and the other end of the elastic connecting member are provided so as to be shifted in the radial direction of the annular member. It is preferable that the polymer does not polymerize in the direction of expansion and contraction of the spring. Further, it is preferable that each of the net-like planar members has a different position of the locking member between the upper and lower net-like planar members so that the locking member does not overlap in the vertical direction.

[0006]

1 to 5 show a typical embodiment of a mattress spring structure of the present invention, which will be described below with reference to the drawings.

In FIG. 1, a mattress spring structure 100 according to the present invention comprises a pair of upper and lower net-like planar members 1 and 2 and a number of springs 3 held between the layers.

The net-shaped flat members 1 and 2 are integrally formed using a synthetic resin material,
According to the shape of the annular members 31 and 32 at the upper end or the lower end, a large number of annular bodies 11 and 21 slightly wider than them are connected in a plane, and their peripheral parts 12 and 22 are connected linearly. It is formed in the shape of a rectangular sheet, and circular holes 13 and 23 are formed in the center of each of the annular bodies 11 and 21, and a substantially rectangular or substantially rectangular shape is formed in a portion surrounded by each of the adjacent annular bodies 11 and 21 and a peripheral portion. Triangular through holes 14, 24, 15, 25 are formed, and the whole is in a porous net shape having many through holes.

The net-like plane members 1 and 2 are
Locking members 16 and 26 are provided at three locations at equal intervals in the circumferential direction of each of the annular bodies 11 and 21. Each locking member 16, 26
Is a circular hole 1 at the center of each of the annular bodies 11 and 21 as shown in FIG.
3 and 23, the ring member 3 of the spring 3
A base portion 61 inscribed in the first and second portions 32 and a locking portion 62 protruding outward in the circumference are formed at a distal end portion thereof. Further, the distal end side of the locking portion 62 is a slope 63, and the slope 6
3, the annular member 3 at the upper end or lower end of the spring 3
1 and 32 can be pressed into the locking portion 62 and locked. Reference numeral 64 denotes a through hole for preventing the locking portion 62 from being undercut during molding.

The spring 3 includes a central annular member 33, two annular members 31 and 32 having an appropriate distance d on both upper and lower sides thereof and arranged in parallel with their axial centers aligned, and each of the annular members 31, 32. A plurality of inverted U-shaped elastic connecting members 34 for connecting the respective 32, 33 to each other at three places on the circumference.
And is formed from

Of the annular members 31, 32, 33, the upper and lower annular members 31, 32 have the same diameter r1 and the center annular member 33 has the same diameter r2 as the upper and lower annular members 31, 32. It is set to be relatively smaller than that. Further, as shown in FIG. 3, each of the elastic connecting members 34 is disposed along a substantially cylindrical virtual cylindrical surface 35 formed by each of the annular members 31, 32, 33. One end 41 and the other end 42 continuous with 32 or 33 are arranged radially shifted so as not to overlap in the central axis direction of each of the annular members 31, 32, 33 (the direction of expansion and contraction of the spring 3).

When the mattress spring structure 100 is composed of the spring 3 and the pair of upper and lower net-like flat members 1 and 2, for example, each of the one (lower in the illustrated example) of the net-like flat member 2 is provided. Locking member 26,
, 26 are pressed into the lower annular member 32 of the spring 3, and the springs 3 are locked and fixed at the respective positions of the annular bodies 21, 21,. The other net-shaped flat member 1 is superimposed on a large number of springs 3, 3,.
.., The upper annular member 3 of each spring 3
, 31, ... are pressed and locked.

Thus, the upper and lower net-like planar members 1 and 2
By holding a large number of springs 3 between the two layers, a mattress spring structure 100 that is integrated can be configured.
A mattress can be formed by laminating elastic layers such as a web, heat insulation, and a breathable sheet, and covering them with side lands. Since the mattress formed by the mattress spring structure 100 is extremely lightweight, it can be used as a substitute for a conventional foldable urethane mattress other than for a bed.

The net-shaped flat members 1 and 2 and the spring 3 are all integrally formed of a synthetic resin material, and are basically formed using a mold. As the resin material to be used, a material having excellent bending strength and particularly strong in repeated bending stress is suitable. For example, a polypropylene-based, polyamide-based, or polyacetal-based resin is used.

In contrast to the spring 3 which directly receives a load, the net-shaped flat members 1 and 2
Basically, a softer resin material or a synthetic resin elastomer is used so that independent deformation of the resin can be tolerated. At this time, the hardness / flexibility of the upper and lower net-shaped planar members 1 and 2 may be different from each other.

The flexibility of the net-shaped planar members 1 and 2 also changes depending on the thickness of each of the annular bodies 11 and 21, that is, the size of the circular holes 13 and 23 and the through holes 14, 24, 15 and 25. Similarly, the hardness of the spring 3 also varies depending on the thickness of each member (particularly, the elastic connecting member 34). Therefore, the hardness of the mattress spring structure 100 as a whole is determined in consideration of these shape and material effects. Is set. Therefore,
If a plurality of types of net-like planar members 1 and 2 and a spring 3 having different physical characteristics in shape and material are prepared, a plurality of types of mattress springs having different usability can be obtained by changing the combination of them. The structure 100 can also be configured.

The mattress spring structure 100 formed by the net-shaped flat members 1 and 2 and a large number of springs 3 is in a state where a load is appropriately dispersed by the net-shaped flat members 1 and 2 during use. , And is supported by a number of springs 3 elastically deformed according to the receiving pressure.
In particular, due to the damping and damping effects of the viscoelasticity of the synthetic resin material, unnecessary vibration and swaying when turning over is suppressed, and there is no squealing sound like a conventional metal mattress spring structure. It is quiet, lightweight and easy to handle during transport.

In the above-described embodiment, a case is shown in which the net-shaped planar members 1 and 2 are formed by connecting annular members 11 and 21 corresponding to the annular members 31 and 32 of the spring 3 in a vertical and horizontal square lattice. However, the annular bodies (11, 21) can also be arranged and connected in a hexagonal lattice shape.

In the above embodiment, the spring 3 is formed as a continuous spring by using three layers of annular members 31, 32, 33 and upper and lower elastic connecting members 34 connecting the annular members 31, 32, 33. However, the number of layers of the annular member and the elastic connecting member can be appropriately set, and may be a conical shape or the like in addition to the continuous shape.

In the mattress spring structure 200 of the second embodiment shown in FIGS. 6 and 7, upper and lower annular members 231 are connected by three elastic connecting members 234 arranged at equal intervals in the circumferential direction. Using the spring 203,
The spring 203 is a pair of upper and lower net-shaped flat members 20.
The spring 20 is held between the layers
The upper and lower annular members 231 and 232 are locked to the locking members 216 and 226 of the net-shaped planar members 201 and 202, respectively, and are integrated.

The spring 203 makes the inner diameter (r2) of the upper annular member 231 smaller than the inner diameter (r1) of the lower annular member 232, and elastically moves along the virtual cylindrical surface 235 formed by them. The connection member 234 is formed in a substantially conical shape by disposing the connection member 234.
The arrangement shape of 4 is the same as the lower half of the spring 3 of the first embodiment.

The upper annular member 23 having a small inner diameter
1 is a flange portion 2 having an outer diameter equal to that of the lower annular member 232.
At the same time, three through holes 236 (locked portions) are formed in the flange portion 233 at equal intervals in the circumferential direction so as to match the inner diameter (r1) of the lower annular member 232, The locking member 216 of the upper net-shaped flat member 201 is locked in the through hole 236. Thereby, even if the spring 203 has a conical shape, the net-shaped planar member 2 on each of the upper and lower sides is formed.
01 and 202 have the same shape, and the parts can be shared with the mattress spring structure 100 of the first embodiment described above.

Further, the mattress spring structure 20
In FIG. 7, as shown in FIG. 7, the arrangement of the locking member 226 of the lower net-shaped flat member 202 is adjusted with respect to a center axis y parallel to the longitudinal direction (or the width direction) of the mattress spring structure 200. The upper net-shaped flat member 201 is the same as the lower net-shaped flat member 202 turned around around the center axis y, while being asymmetric by tilting the angle θ. Therefore, the positions of the upper and lower locking members 216 and 226 are displaced in the circumferential direction by an angle 2θ, and the corresponding holes 236 of the upper annular member 231 in the spring 203 are correspondingly arranged.
Is shifted from the locked position of the lower annular member 232.

With the above structure, the upper and lower net-like flat members 201 and 20 are formed in the mattress spring structure 200.
Upper and lower locking members 216, 2 while sharing the two parts
26 is the vertical direction, that is, the mattress spring structure 2
Even if an excessive compressive load is applied to the mattress spring structure 200 without overlapping in the thickness direction of 00, the upper and lower locking members 216 and 226 are prevented from colliding with each other and causing a misalignment. The locking members 216 and 226 come into contact with flat portions such as the flange portion 233, and a stable supporting state is obtained. The above-described matter is obtained when the spring 3 is provided with three or more annular members 31, 32, 33 as in the first embodiment, and it is not necessary to consider the contact and interference of the upper and lower locking members 16, 26. Not required.

The flange portion 23 of the spring 203
3 includes an elastic connecting member 234 and a vertical direction (spring 2).
A large amount of elastic deformation can be obtained in the spring 203 by forming a through hole 237 at a position where the elastic portion is overlapped in the direction (03 expansion / contraction direction) and avoiding contact between the flange portion 233 and the elastic connecting member 234.

In each of the above embodiments, the case where one spring 3 or 203 is used has been described.
Two or more springs may be stacked and connected and integrated by means such as adhesion, fusion or fitting. Also,
The elastic connecting members 34 and 234 of the springs 3 and 203
Two pieces arranged mirror-symmetrically to each other may be provided as a pair, or three or more places may be provided in the circumferential direction. Further, the arrangement pattern of two or more elastic connecting members may be combined, or two or more portions having different patterns may be formed in the length direction of the spring.

[0027]

Since the mattress spring structure of the present invention is constructed as described above, the following effects can be obtained.

Since it is composed of a plurality of springs and a pair of upper and lower net-like planar members interconnecting the upper and lower ends of the respective springs, all of which are integrally formed of a synthetic resin material. It is much lighter than conventional generally used metal coil springs, torsion bars, etc., it is easy to handle the mattress, and it has good consistency with the fiber material such as side ground, There is no problem, and furthermore, the manufacturing cost can be kept low by being constituted only by locking or fitting without going through the bonding or welding process, and various elastic materials such as chairs, sofas, cushions, etc. It can be expected to be widely used as a buffer material. Also, if a plurality of types of springs having different hardness / flexibility and height shapes are prepared as upper and lower net-like planar members and springs, various mattress spring structures having different feelings of use can be easily configured by changing the combination. .

Each of the springs is excellent in stability and durability even if it is made of a synthetic resin in which the rigidity of the material itself is inferior to that of a metal material, and the elastic force per weight of the synthetic resin material used is extremely large. Above, the visco-elasticity of the synthetic resin material provides cushioning and damping action, which suppresses unnecessary vibration and swaying when turning over, and also produces squeaky sounds like a conventional metal mattress spring structure. In addition, since there are many voids, a mattress having excellent air permeability can be formed.

Further, the net-shaped flat member can obtain a stable support state by independent elastic deformation corresponding to the receiving pressure of each spring at the load portion, while appropriately distributing the load in a plane. In addition, since the structure is highly stable and the opening is secured to the maximum, a mattress excellent in air permeability can be formed in combination with the structure of the spring.

Since the positions of the locking members are made different between the upper and lower net-like planar members so that the locking members do not overlap in the vertical direction, an excessively large mattress spring structure is mainly used. The collision and interference between the upper and lower locking members can be prevented even for a moderate load, and a stable supporting state can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a mattress spring structure according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a manufacturing process of the mattress spring structure according to the first embodiment of the present invention.

FIG. 3 is a partial side view showing the mattress spring structure according to the first embodiment of the present invention.

FIG. 4 is a partial plan view showing the mattress spring structure according to the first embodiment of the present invention.

FIG. 5 is a sectional view taken along line VV of FIG. 4;

FIG. 6 is a partial side view showing a mattress spring structure according to a second embodiment of the present invention.

FIG. 7 is a partial plan view showing a mattress spring structure according to a second embodiment of the present invention.

[Explanation of symbols]

 1,2,201,202 Net-shaped flat member 3,203 Spring 11,21,211,221 Ring body 16,26,216,226 Locking member 31,32,33,231,232 Ring member 34,234 Elastic connection Member 100,200 Spring structure for mattress

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) A47C 23/05 A47C 25/00 A47C 27/07

Claims (3)

(57) [Claims] 1. A plurality of springs and a pair of upper and lower net-like planar members interconnecting an upper end and a lower end of each spring. Each of the springs is integrally formed of a synthetic resin material. A plurality of annular members which are appropriately spaced and have the same axial center and are arranged in parallel, and an elastic connecting member for connecting the annular members to each other at a plurality of positions. Is arranged along the virtual tubular surface formed by and is formed into an inverted U shape curved in the circumferential direction of the annular member, while the net-shaped planar member is integrally formed of a synthetic resin material as a whole, An annular body corresponding to an annular member at the upper end or lower end of each of the springs is formed in a net shape by planar connection.
A plurality of locking members capable of locking the annular members at the upper end or the lower end of each of the springs are arranged at appropriate intervals in a circumferential direction of each of the annular bodies, and each of the springs has a pair of upper and lower nets. A spring structure for a mattress, wherein the springs are respectively engaged with upper and lower net-like planar members so as to be held between layers of the planar member, and are integrated. 2. Each spring is provided such that the diameter of the annular member is different between vertically adjacent annular members, and one end and the other end of the elastic connecting member are displaced in the radial direction of the annular member. 2. The mattress spring structure according to claim 1, wherein the springs do not overlap in the direction of expansion and contraction of the spring. 3. The net-like planar members are arranged such that the positions of the locking members are different between the upper and lower net-like planar members so that the locking members do not overlap in the vertical direction.
Or the spring structure for mattress according to 2.