JP2000051010A - Mattress spring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mattress spring which freely raises/lowers without affected its upper annular body by the behavior of the upper annular bodies of adjoining springs and is easily and surely connected to the adjoining spring single bodies in connecting them together. SOLUTION: A plurality of spring single bodies 1 which are formed of a plurality of annular members arranged in parallel about respective axial centers at appropriate intervals, elastic connecting members 4 connecting the annular members with each other in a plurality of positions, and joint fixing members 5 provided in the annular members or the elastic connecting members 4, and whose bodies are integrally formed of a synthetic resin material are connected mutually by joints 8 fitted to the joint fixing members 5. The joint fixing members 5 are provided each in the center position in the height direction of the spring.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a spring for mattresses 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. In addition, the upper and lower annular portions of adjacent springs are fixed to each other. To have been
When a pressing force is applied to the spring at a specific part and the spring tries to contract, the annular part of the adjacent spring that is integrally connected to the upper annular part of the contracting spring is also affected and pushed down. May result in unstable operation.

As described above, a spring formed by molding plastic has been developed to eliminate the low productivity required for assembling a metal spring. However, if the connecting means is not changed from the conventional method, the productivity is improved. No improvement in usability can be expected.

[0004]

SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to allow an upper annular body of a spring to freely move up and down without being affected by the behavior of an upper annular body of an adjacent spring. It is another object of the present invention to provide a mattress spring that can easily and reliably operate adjacent springs.

[0005]

A plurality of annular members which are appropriately spaced from each other and are arranged in parallel with one axis being in parallel, an elastic connecting member which connects the annular members to each other at a plurality of positions,
A plurality of springs, which are formed integrally with the annular member and / or the elastic connecting member and are integrally formed of a synthetic resin material, are connected to each other by a joint fitted to the joint fixing member. Become. Further, the joint fixing member was provided at the center of the spring in the height direction.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Spring 1 for mattress of the present invention
Reference numeral 00 denotes a set of springs 1 alone. The spring unit 1 has a plurality of annular members 2 each formed of a flange-like body arranged in parallel up and down with its central axis being one. The illustrated example comprises an intermediate annular member 2C provided between the upper end annular member 2U and the lower end annular member 2D. The upper and lower end annular members 2U, 2D have a large diameter to improve stability, and the intermediate annular body 2C has a slightly smaller diameter, and connects the annular members 2U, 2D, 2C and the annular members 2U, 2C, 2D, which will be described later. The outer peripheral edge of the connecting member 4 forms a substantially drum-shaped virtual cylindrical surface 3.

[0007] Between the two vertically adjacent annular members 2U and 2D, 2C and 2D, which are arranged in parallel with each other, the upper and lower members are turned over at three places on the circumference of each of the annular members 2U, 2C and 2D.
An elastic connecting member 4 having a U-shape (U-shape) is provided, and the annular members 2U, 2C, 2D and the elastic connecting member 4 are integrally formed. The portion where the elastic connecting member 4 is connected to the upper and lower annular members 2U and 2D is bent in an L shape in a side view, and the outer edge of the bent portion is used as a contact surface 6 with a joint fixing member 5 described later.

A joint fixing member 5 is provided at the intersection of the center annular member 2C and the elastic connecting member 4C. End annular member 2
When U and 2D are bent most, the contact surface 6 comes into contact with the receiving surface 7 of the joint fixing member 5 to prevent further compression. Further, the upper and lower annular members 2U and 2D are provided with arch-shaped notches 10 so that the U-shaped bent portion of the elastic connecting member 4 does not come into contact when the elastic connecting member 4 is bent most. The joint fixing member 5 is a block protruding from the front side of the virtual cylindrical surface 3 and having a flat receiving surface 7 on the upper and lower sides, and has an insertion hole 9 for a joint 8 formed in the front surface. The insertion hole 9 penetrates to the back of the joint fixing member 5.

The whole spring 1 is integrally formed of a synthetic resin material and is basically formed using a mold. As the resin material used for the spring 1, 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.

When a compressive load (equally distributed load) is applied to the single spring 1 constructed as described above, each elastic connecting member 4 is bent in a direction to narrow the interval of the inverted U-shape, and the single spring is formed. 1 as a whole is compressed by an elastic deformation amount commensurate with the above-mentioned compressive load to be in an equilibrium state.

When an excessive compressive load P exceeding the limit of the shape elastic deformation is applied to the spring 1, the contact surfaces 6, 6 of the upper and lower elastic connecting members 4, 4 are respectively formed in the intermediate annular shape. By contacting the receiving surface 7 of the joint fixing member 5 of the member 2C, further elastic deformation is restricted.

Therefore, even if the spring 1 has a tertiary inclination due to the bending and twisting of the U-shaped bent portions of the elastic connecting members 4 and 4, the bent portions come into contact with each other. It is possible to prevent the support state from becoming unstable or being damaged due to the difference between the outside and the inside, thereby obtaining a stable support state. Note that the joint fixing member 5 may be formed over a wider range as long as the positions of the insertion holes 9 are provided at 120 ° intervals. Further, the joint fixing member 5 is formed in a flange shape over the entire circumference of the annular member 2. You may.

As shown in FIG. 5, the joint 8 includes a pair of thin plate-like short arms 11 and 12 extending substantially linearly, and a long arm 13 extending obliquely from the center thereof. Are provided with lengthwise cuts 14, respectively, so that when a lateral force is applied to each arm, it has elasticity and can rebound. Hooks 15, 15 project from both side edges of the tip.

The mattress spring 100 of the present invention comprises:
As shown in FIG.
The connection method is described below. First, as shown in FIG. 1, the tops of the joint fixing members 5 of the two springs 1A and 1B are positioned so as to face each other, and the short arms 11 and 12 of the joint 8 are inserted into the insertion holes 9 of the joint fixing members 5 facing each other. The remaining long arm 13 is fitted into the insertion hole 9 of the joint fixing member 5 of the spring unit 1C in which the spring unit 1A, 1B is arranged in a triangular shape together with the spring unit 1A. The springs 1A, 1B, 1C are fixed to the springs. The fitting between the joint 8 and the joint fixing member 5 is performed by inserting the hook 15 at the tip of the leg into the insertion hole 9 of the joint fixing member 5 while narrowing the hooks 15 at the tip of the arm by the cut 14. The hook 15 at the tip of the leg is locked to the inner wall of the joint fixing member until it comes out of the hole 9. By repeating this, the number of connected springs alone is increased to an appropriate number.

As described above, the mattress spring of the present invention is connected so as to have a desired shape and size as a mattress, and the connection is made by a joint 8 provided at an intermediate position in the vertical direction of the spring. Therefore, the annular members 2U and 2D at the upper and lower ends of the spring are completely free. Therefore, when downward pressure is applied to the upper and lower annular members 2U and 2D of the springs, the individual springs are deformed downward by the pressure applied to each of the springs. It does not affect the deformation of the spring itself, and each spring deforms independently according to the force received by the machine frame, so when used as a mattress, it faithfully follows the distribution of human body weight Allows to receive weight with deformation along. Further, since the individual springs 1 are connected by the jotent 8, if the arm length of the joint 8 is changed as appropriate, the interval between the springs 1 can be changed sparsely and appropriately.

[0016]

According to the present invention, there is provided a mat spring comprising: a plurality of annular members which are appropriately spaced from each other and are arranged in parallel with their axial centers being one; an elastic connecting member which connects the annular members to each other at a plurality of positions; A plurality of springs each integrally formed of a synthetic resin material and formed integrally with the annular member and / or a joint fixing member provided on the elastic connecting member, and are connected to each other by a joint fitted to the joint fixing member. Therefore, the annular members at the upper and lower ends of the springs can move up and down without being influenced by the neighboring springs at all, and can be used according to the force received by each spring alone when used as a mattress. When the adjacent spring alone that can give weight and does not add weight sinks under the influence of the weighted spring alone Migihitsuji thing no, it is possible to support the weight applied to the mattress stable.

The connection of the springs only requires a short insertion into the insertion holes 15 of the joint 8 and the joint fixing member 5, so that the workability is extremely good and the production efficiency can be increased.

[Brief description of the drawings]

FIG. 1 is a cross-sectional plan view of the mattress of the present invention.

FIG. 2 is a plan view of a mattress alone.

FIG. 3 is a front view of the mattress alone.

FIG. 4 is a perspective view of the mattress alone viewed from below.

5A is a plan view of the joint, FIG. 5B is a right side view of the joint, and FIG. 5C is a front view of the joint.

[Explanation of symbols]

 Reference Signs List 1 spring simple substance 2 annular member 3 virtual cylindrical surface 4 elastic connecting member 5 joint fixing member 6 contact surface 7 receiving surface 8 joint 9 insertion hole 11, 12 short arm 13 long arm 14 cut 15 hook 100 spring for mattress

Claims (2)

[Claims] 1. A plurality of annular members which are appropriately spaced from each other and are arranged in parallel with their axial centers aligned, an elastic connecting member for connecting the annular members at a plurality of positions, and the annular member and / or the elastic connecting member. A mattress comprising: a plurality of springs, each of which is integrally formed of a synthetic resin material, which is composed of a joint fixing member provided on a member, and connected to each other by a joint fitted to the joint fixing member. For spring. 2. The mattress spring according to claim 1, wherein the joint fixing member is provided at a central position in a height direction of the spring.