JPH0838312A - Spring structure - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a stable and durable spring structure which is extremely high and is free from twisting and lateral shake. [Structure] A plurality of coil springs 1 are spread over each other, and at least two layers of spring units framed by two frame lines 2 are overlapped, and upper and lower spring units 3, 4 are provided with a cushioning member 5 between adjacent frame lines. Fixed with a clip 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spring structure used for beds, mattresses and the like.

[0002]

2. Description of the Related Art Conventional spring structures used for beds, mattresses, etc. all have a structure in which coil springs are arranged in one layer. That is, as shown in FIG. 5, usually, a single coil spring is jointed between adjacent coil springs and arranged in a plane, and is inserted in a bed, a mattress or the like as a spring unit. The same applies to the case where this spring uses a so-called pocket coil. In this case, a plurality of pocket coil rows each accommodating a coil spring preloaded on each continuously formed bag are arranged. It was used as a one-layer spring unit. FIG. 6 shows the details of the corner part particularly when a pocket coil is used. 1 is a pocket coil, 2 is a frame line for holding a spring unit formed by arranging a plurality of pocket coil rows in a rectangular shape, Reference numeral 3 is a clip for fixing the outer peripheral row of pocket coils and the frame line 2. Usually, a mattress is made by attaching various paddings to the upper and lower surfaces of the above spring unit, wrapping the entire outer surface with quilted panels and borders, and sewing the outer circumference.

[0003]

On the other hand, in recent years, with the diversification of users, beds and mattresses are required to have improved feeling of sleep and diversified taste, and further improved durability. . In order to solve these problems, in the case of a spring mattress, it is general to improve the spring unit which is the heart of the mattress. For improvement, it is best to increase the height of the spring unit in order to enhance the sprinkling effect and the luxury. However, in the conventional spring unit, when the height is increased, defects such as twisting and lateral vibration occur in the mattress. Moreover, in order to diversify the rigidity of the spring according to the taste, the mattress had to be replaced.

An object of the present invention is to provide a stable and durable spring structure which is extremely high in height, and is free from twisting and lateral vibration, and is strong and luxurious and has various tastes. It provides a mattress that suits your needs.

[0005]

A plurality of coil springs, which are formed by arranging a plurality of rows of coil springs arranged side by side, are formed by superimposing at least two stages, and the spring units are connected by clips. Forming a pocket coil row in which coil springs are housed in each of continuously formed bags.
Further, a cushioning material sheet is interposed between the overlapping spring units, and further, a cushioning material sheet selected from the group of needle felt, cotton felt, palm felt, hard felt, cloth and paper is used. Thickness is 1 to 20 mm, preferably 1 to 10 mm, optimally 3
It is about 7 mm. Furthermore, the spring unit of each stage is made to have a different spring property for each stage so that it is possible to quickly respond to diversification of taste.

[0006]

According to the present invention, by stacking the spring units, the bending of the upper layer spring unit is shared and absorbed by the lower layer spring unit, and the same operation as the stable use of the long coil spring is provided. be able to. Also, by interposing the cushioning material sheet, lateral displacement between the layers can be prevented and a large allowable value of centering between the coil springs of the layers can be obtained.

[0007]

EXAMPLE A human figure has relatively complicated irregularities. For example, when a person reclines, it is preferable to support the weight evenly along the lower surface of the irregularities. For this purpose, it is desirable that the spring unit be capable of ensuring the displacements corresponding to the respective locations, and that the spring unit has a large restoration property as soon as the load is removed. In order to increase the displacement, it is necessary to increase the length of the spring. However, there is a limit to the amount of displacement (bending allowance) in design, and for a mattress spring, the bending allowance (δ) is L / D <4.
= L / 1.3 is the limit. Here, L is the free length of the coil spring, and D is its diameter.

Therefore, if the bending allowance is increased, the coil spring length (L) is inevitably increased, which causes the mattress to be twisted or shaken.
To avoid this, the coil spring diameter (D) must be increased, but increasing the coil spring diameter (D) means reducing the number of springs per unit area of the mattress. A feeling of sleepiness becomes worse. Currently, the coil spring used for pocket coil is D = 65mm and L is 2
30 mm, when preloaded (L ₁ when inserted into the bag) approx. 130 mm
Therefore, δ has a limit of about 180 mm.

According to the present invention, the mattresses that operate within the proper condition range of the spring have a structure in which the mattresses are stacked in several stages.
It is possible to multiply the natural flexure of each step to obtain the desired displacement and at the same time give luxury with a thick appearance. The mattress used in the current bed had a production limit of about 200 mm at most, but the present invention caused the wall to be severely broken.

Generally speaking, the stiffness of the bed is different for each person, and it is generally said that the Japanese prefer a harder bed to Westerners. As a means for giving this rigidity, there are two methods of making the coil spring itself rigid, or preliminarily bending (preloading) the weak spring coil. The latter is preferable from the standpoint of restoring sensitivity, and the pocket coil easily gives the stable latter state. It can be said that the pocket coil is more preferable for the purpose of a bed having a large thickness, because each coil spring acts almost independently and has little influence on other coil springs and has high adaptability to irregularities in shape. Further, when stacking a plurality of mattresses, it is necessary that the upper and lower springs have the same core, and in the pocket coil, the upper and lower springs are easily aligned with each other, which is also advantageous in this sense.

However, it is structurally impossible to completely align the cores, and it is necessary to interpose a cushioning material between the upper and lower springs to be overlapped in order to allow the displacement of the upper and lower cores to some extent. The cushioning material further prevents lateral displacement between the spring units, reduces the load on the clip that fixes the spring units, and even makes it possible to make the clip easy to remove. This cushioning material should have some friction.
When the friction is small like a film of a certain kind of synthetic resin, a gap between the upper and lower spring units is likely to occur, which is not preferable. As the cushioning material, needle felt, palm felt, cotton fluff (cotton), hard felt, cloth, paper and the like are used. The thickness is 1 mm
To 20 mm, preferably 1 mm to 10 mm.
This is because if it is thicker than 20 mm, a problem occurs due to lateral displacement due to the cushioning material itself, and if it is thinner than 1 mm, the effect on centering between the springs is reduced. Substantially 1 mm to 10 mm is preferable, and 3 mm to 7 mm is optimal for productivity.

As described above, the rigidity of the bed mattress depends on each person's preference, but not only the spring units of the present invention having the same rigidity are used for each step, but also each step is It is also possible to configure with different rigidity and to arbitrarily select it according to taste.
In addition, springs having different spring rigidity can be arranged partially (for example, a head, a waist, a foot, etc.) in one spring unit. Further, since the mattresses are stacked in several stages, there is an advantage that the number of so-called mattress rotations can be reduced. Furthermore,
By using a clip that can be easily removed, the spring unit can be easily reassembled, and a mattress that can always expect a new state is possible.

Next, specific embodiments of the present invention will be described with reference to the drawings. Example 1 FIG. 1 is a perspective view in which a part of a two-stage spring unit using a pocket coil of the present invention is omitted, FIG. 2, and FIG.
FIG. 2 is an enlarged view of a main part of FIG. In the figure, 1 is a pocket coil, 2 is a frame line, 3 is an upper layer spring unit, 4 is a lower layer spring unit, and 5 is a cushioning material. A belt-shaped body in which a coil spring is inserted in a pre-compressed form in a bag that is continuously formed of a highly breathable cloth such as a non-woven fabric,
A spring unit alone is constructed by forming a mat-shaped one by point bonding, enclosing the mat-shaped outer peripheral row with two frame lines 2, and fixing the outer peripheral row and the frame line 2 with a fixing clip 6 at a required position. Configure. The spring units are superposed on each other with a cushioning member 5 interposed therebetween, and adjacent frame lines are joined by a clip 7. Usually, the clip 7 also serves as part or all of the fixing clips 6 on the adjacent frame lines and is joined at the same time as the important point fixing, but is joined separately by a detachable clip 7 different from the fixing clip 6. You can also In this embodiment, the specifications of the coil spring are as follows. Spring diameter D = 65 mm Free spring length L = 230 mm Spring length in bag L ₁ = 130 mm Spring wire diameter d = 2.2 mm Number of coil turns n = 5 Frame wire 2 is a steel wire with a wire diameter of 5 mm, and cushioning material 5 is 5m thick
m needle felt sheet was used.

Embodiment 2 FIG. 4 is a perspective view of a second embodiment of the present invention, showing a case where the spring unit is composed of upper, middle and lower three layers. in this case,
In total, it was possible to obtain a gorgeous mattress with a height of 400 mm. Moreover, the bed caused by this did not cause lateral blurring or twisting at all. The number of rotations of the mattress is about 1/3 due to the upper, middle and lower 3 layers.
When the same rotation as in the case of 1 layer is performed,
The life of the mattress has been greatly extended.

[0015]

As described above, the present invention has the following effects. (1) In the current production technology, in the case of the pocket coil, the production limit is about 200 mm, but the multi-stage spring unit eliminates the limitation on the height of the mattress. (2) In particular, by providing a spring unit composed of pocket coils in multiple stages, it is possible to provide an extremely thick mattress that is stable without twisting or wobbling (lateral shake) and has a sense of mass. (3) By using a pocket coil, the spring performance can be improved and the service life can be extended by the synergistic effect of multiple steps. (4) Since the axes of the upper layer coil and the lower layer coil are coincident with each other, the lower layer coil absorbs the bending of the upper layer coil, resulting in a comfortable sleep.
Step up. (5) The effect of the conventional double cushion in which the bottom and the mattress are combined can be obtained only by the mattress of the present invention. (6) A large economic effect can be expected due to the above effects.

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention.

FIG. 2 is a partially enlarged view of FIG.

3 is a partially enlarged view of a corner portion of FIG.

FIG. 4 is a perspective view of a second embodiment of the present invention.

FIG. 5 is a perspective view showing an example of a conventional spring structure.

6 is a partially enlarged view of a corner portion of FIG.

[Explanation of symbols]

 1 pocket coil 2 frame line 3 upper layer spring unit 4 lower layer spring unit 5 cushioning material 6 fixing clip 7 clip 8 middle layer spring unit

Claims (6)

[Claims] 1. A spring unit comprising at least two rows in which a plurality of rows of coil springs are arranged side by side.
A spring structure, characterized in that the spring units are formed in a stacked manner and the spring units are connected by clips. 2. The spring structure according to claim 1, wherein the row in which the plurality of coil springs are connected is a pocket coil row in which coil springs are housed in respective continuously formed bag bodies. 3. A cushioning material sheet is interposed between the overlapping spring units.
Or the spring structure according to 2. 4. The cushioning material sheet is needle felt,
Cotton felt, palm felt, hard felt,
The spring structure according to claim 3, wherein the spring structure is selected from the group consisting of cloth and paper. 5. The cushioning material sheet has a thickness of 1 to 20 m.
m, preferably 1 to 10 mm, optimally 3 to 7 mm, spring structure according to claim 3 or 4. 6. The spring structure according to claim 1, wherein the spring units of each step have different spring properties for each step.