JPH0379009B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a spring device used in pinerests, chairs, and the like.

(Prior Art) For example, in the case of a pinerest for a bed, a spring device is formed by connecting a large number of coiled springs in a flat plate shape, and an elastic material made of urethane foam or the like is polymerized on the flat surface of this spring device. It consists of a polymer coated with an exterior material. In a spring device with such a configuration, a large number of independent coiled springs are arranged in rows and columns, and the upper and lower end surfaces of these coiled springs are connected by helical wires in the row or column direction. Therefore, there is a problem in that the assembly work requires a lot of effort and productivity is poor.

Therefore, in order to solve this problem, we created a connection in which multiple spiral parts whose axes are made almost parallel by bending a single steel wire are connected to the upper and lower ends of each adjacent spiral part. It has been put into practical use to form a spring device using a plurality of spring units formed by connecting rods. Such a prior art technique is disclosed in Japanese Patent Application No. 149789/1983.

By the way, in the spring device shown in the above-mentioned prior art, if a spring unit consisting of a plurality of spiral parts and a connecting rod part that connects these spiral parts is arranged side by side with a single steel wire, then Only the connecting rods of each spring unit are connected to each other by a helical wire. The connecting rod portion is located at one end in the width direction of the spring unit. Therefore, against the load applied to the top surface of the spring device,
Not only is it difficult for the spiral portion and the connecting rod portion of each spring unit to deform elastically as a unit, but they also do not deform uniformly in the width direction and tend to tilt, resulting in the upper surface of the spring device being wavy, resulting in poor cushioning properties. There have been cases where the damage has occurred.

In addition, each adjacent spring unit is connected by a helical wire with the connecting rod part of one side in contact with the spiral part of the other side, so they are in point contact.
A sufficient contact length cannot be obtained compared to the line contact state,
In some cases, it was not possible to achieve a stable and reliable connection.

(Problems to be Solved by the Invention) This invention has been made based on the above-mentioned circumstances, and its purpose is to ensure that each spring unit elastically deforms uniformly in response to the load without inclining in the width direction. It is therefore an object of the present invention to provide a spring device which can improve cushioning properties and can reliably connect adjacent spring units.

[Structure of the Invention] (Means and Effects for Solving the Problems) In order to solve the above problems, the present invention provides a plurality of spiral parts arranged in a line at predetermined intervals with axes substantially parallel to each other, A connecting rod portion connecting the upper and lower ends of adjacent spiral portions is continuously formed by a single steel wire, and one end of the connecting rod portion is connected to the end of the adjacent spiral portion. A plurality of spring units formed of a pair of continuous first straight parts and a second straight part spaced apart from each other in parallel with the first straight parts are arranged in parallel, and each adjacent spring unit The first straight part and the second straight part of these connecting rod parts are connected by a helical wire.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. 2 and 3 show top views of the spring device 1. FIG. This spring device 1 has a plurality of spring units 2 arranged along its width direction.
It consists of Each spring unit 2 has a plurality of spiral portions 3a, 3b whose axes are substantially parallel.
. . , and an upper connecting rod portion 4 and a lower connecting rod portion 5, which respectively connect the upper and lower ends of the adjacent spiral portions 3a, 3b, . . ., are continuously formed by a single steel wire.

That is, to explain one of the spring units 2, first, a steel wire is raised to form a first spiral portion 3a. From the terminal end of the first spiral section 3a, an upper connecting rod section 4 having one end connected to the terminal end is led out in a substantially U-shape. A steel wire is made to fall down from the other end of the upper connecting rod portion 4 and is wound around the second spiral portion 3a, the axis of which is parallel to the first spiral portion 3a.
A spiral portion 3b is formed. That is, the upper connecting rod part 4 is a pair of first straight parts located on one end side in the width direction of the spring unit 2, with one end continuous with the upper ends of the first spiral part 3a and the second spiral part 3b, respectively. 4a and a second straight part 4b spaced apart in parallel with the first straight part 4a in the horizontal direction and located on the other end side in the width direction of the spring unit 2 form a horizontal rod 4c along the width direction of the spring unit 2. It is formed continuously by

From the trailing end of the second spiral portion 3b, a lower connecting rod portion 5 having one end connected to the trailing end is led out in a substantially U-shape. A steel wire is raised up from the terminal end of the lower connecting rod portion 5 and wound around the third spiral portion, the axis of which is parallel to the first and second spiral portions 3a and 3b.
A spiral portion 3c is formed. Note that the lower connecting rod portion 5 also has a pair of first straight portions 5a, similar to the upper connecting rod portion 4.
These first straight parts 5a and second straight parts 5b spaced parallel to each other in the horizontal direction are continuously formed by a horizontal rod 5c extending in the width direction of the spring unit 2.

By sequentially repeating and forming the spiral parts 3a, 3b, 3c... and the upper and lower connecting rod parts 4, 5 in this way, a plurality of spiral parts 3a, 3b whose axes are approximately parallel are formed from one steel wire. , 3c, . . . and connecting rod portions 4, 5, which alternately connect the upper and lower ends of these spiral portions, are formed into a spring unit 2 that is linearly continuous.

Spring unit 2 molded as described above
are arranged in parallel as shown in FIG. The first straight part 5a and the second straight part 5b are each connected by a helical wire 6. Frame lines 7 are connected by clips 8 to the peripheral edges of the upper and lower surfaces of the plurality of spring units 2 connected in this way to form a flat plate shape. In addition, elastic materials (not shown) are polymerized on the upper and lower surfaces of the spring units 2 via protective materials, and these polymers are covered with an exterior material (also not shown) to form a pinerest. .

Note that in FIGS. 2 and 3, the sizes of the upper connecting rod portion 4 and the lower connecting rod portion 5 in the width direction of the spring unit 2 are changed for the sake of clarity, but these connecting rod portions 4 , 5 may be the same size.

In the mattress having such a configuration, among the plurality of spring units 2 forming the spring device 1, adjacent spring units 2 are connected to the first linear portions 4 of the upper and lower connecting rod portions 4, 5, respectively.
a, 5a and second straight portions 4b, 5b were connected by a helical wire 6.

The first linear portions 4a, 5a and the second linear portions 4b, 5b are spaced apart from each other in the width direction of the spring unit 2, and are located on both sides thereof. Therefore, when a load is applied to the upper surface of this spring device 1, each spring unit 2 rotates its spiral portions 3a, 3.
b, 3c... and the upper connecting rod portion 4 are integrally displaced and do not tilt in the width direction. In other words, since the entire upper surface of the spring device 1 is elastically displaced by approximately the same amount, the upper surface is prevented from undulating, and good cushioning properties can be obtained.

In addition, the first straight parts 4a, 5a and the second straight parts 4b, 5b of the upper and lower connecting rod parts 4,5 of the adjacent spring units 2 are connected by a helical wire 6. The first straight portions 4a, 5a
and the second straight portions 4b, 5b are in line contact. Therefore, a pair of adjacent spring units 2 are connected to the first and second straight portions 4a, 5a,
A sufficient length of line contact between 4b and 5b allows for good bonding without rattling.

[Effects of the Invention] As described above, the present invention provides a plurality of spiral portions whose axes are substantially parallel, a first straight portion connecting the upper and lower ends of adjacent spiral portions, and this first straight line. A plurality of spring units in which a connecting rod part consisting of a second straight part and a second straight part spaced apart in the horizontal direction are continuously formed by one steel wire are arranged in parallel, and the first straight part of the adjacent spring unit The straight line part and the second straight part are connected by a helical wire. Therefore, each spring unit has no inclination in the width direction and its spiral portion and connecting rod portion are elastically deformed as a unit, so that the upper and lower surfaces of the spring device do not wave and good cushioning properties are obtained. . Moreover, since adjacent spring units are connected by a helical wire with the first straight part and the second straight part in line contact over a sufficient length, good joint strength without wobbling can be obtained. .

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which FIG. 1 is a perspective view of a portion of a spring unit, FIG. 2 is a plan view of the entire spring device, and FIG. 3 is an enlarged plan view of a portion thereof. 2...Spring unit, 3a, 3b, 3
c,... spiral part, 4... upper connecting rod part, 5... lower connecting rod part, 4a, 5a... first linear part, 4
b, 5b... second straight section.

Claims (1)

[Claims] 1. A plurality of spiral parts arranged in a line at predetermined intervals with their axes substantially parallel to each other, and a connecting rod part that connects the upper and lower ends of adjacent spiral parts are connected continuously by a single steel wire. a pair of first straight line parts that are formed, and one end of which is continuous with the end of the spiral part adjacent to the connecting rod part, and a second straight line that is spaced apart from each other substantially parallel to the first straight line part in the horizontal direction. A plurality of spring units each formed from a connecting rod portion are arranged in parallel, and each adjacent spring unit is connected with a first straight portion and a second straight portion of these connecting rod portions by a helical wire. Features a spring device.