JPS5853216B2 - spring structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a spring structure used in a pinerest chair or the like.

For example, a pinerest for a bed is made by connecting a large number of compression springs into a flat plate to form a spring structure, polymerizing an elastic material such as urethane foam on the flat surface of this spring structure, and applying this polymer to the exterior material. It is constructed by covering.

The pinerest with this type of structure has a softness that supports the user without transmitting the stiffness of the spring structure to the user when the user lies down, and a pine support that supports the user's heavy parts, such as the buttocks, deep inside the spring structure. An important performance requirement is hardness that supports the material without sinking.

Conventionally, the above spring structure usually includes a compression spring,
A large number of so-called coil springs made of spirally wound wire rods connected together in the form of a flat plate were used.

However, in a spring structure made up of a coil spring, the amount of deflection of the coil spring is almost proportional to the load, so if a soft coil spring is used to give the spring structure flexibility,
It is unavoidable that the amount of deflection will increase in areas where a large load is applied.

That is, a heavy part of the user, such as the buttocks, sinks deeper into the spring structure than other parts.

This results in the user having to be supported with his or her back bent, which not only makes sleeping uncomfortable, but is also bad for one's health.

Therefore, some ideas are being considered, such as using hard coil springs to prevent the user's heavy parts from sinking too deeply, or installing reinforcing members to reinforce the coil springs in places that support the heavy parts. In this case, the flexibility required for the performance of the spring structure is lost, and in the latter case, parts other than the coil spring are required, resulting in higher costs and more complicated assembly work.

This invention was made based on the above circumstances, and its purpose is to provide a good feel that softly supports the user, and a hardness that does not cause the user's heavy parts to sink deeply. The purpose is to provide a spring structure with a

An embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

In the figure, 1 is a spring structure.

This spring structure 1 includes a large number of compression springs 2...
are connected in a flat plate shape, and a frame line 3.3 is connected to the periphery of the upper and lower surfaces.

The compression spring 2 is formed by bending a wire rod as shown in FIGS. 4 to 6.

That is, the first receiver, which is formed in a rectangular frame shape and faces parallel to each other at both upper and lower ends, has a portion 4 and the second receiver has a portion 5.
The receiver has a first spiral part 6 in which the wire is wound approximately 450 degrees in the part 4.
are continuous.

A linear torsion portion 7 is continuous with the first spiral portion 6 .

A second helical part 8 in which a wire is wound approximately 270 degrees in the opposite direction to the first helical part 6 is continuous to this torsion part 7, and this second helical part 8 is connected to the second receiving part 5. It is continuous.

Both end portions of the first and second receivers of the wire located in the portions 4 and 5 are bent into U-shaped hooks 9 and 10, and these hooks 9 and 10 are connected to the first and second receivers. is the first part following parts 4 and 5.
, are engaged with the base end portions of the second spiral portions 6 and 80.

In addition, the first and second receiver parts 4 and 5 each have a bent part 11 in which each side forming a rectangular frame is bent in an upside-down direction at both ends and each adjacent end. ...is formed.

In the compression spring 2 formed in this way, as shown in FIG. . . . by connecting them in rows so as to be continuous through the . are connected in a shape.

The compression spring 2, which is connected in a flat plate shape and positioned at the periphery, has a frame line 3 made of a band-shaped steel plate passed through the corner portion located at the outermost edge of the upper receiver portions 4 and 5. There is.

Furthermore, between the pair of upper and lower frame lines 3, 3, reinforcing springs 15, which are formed by bending a band-shaped steel plate into an annular shape and have substantially W-shaped spring parts 14, 14 on both sides, are installed at predetermined intervals in the peripheral direction on the upper and lower sides thereof. are connected by clips 16 . . . to constitute the spring structure 1.

In addition, when connecting the compression springs 2 in a row, the upper receiver parts 4 and 5 should be opened at the hooks 9 and 10, and the upper receivers of the adjacent compression springs 2 should be connected to the parts 4 and 5. The upper receiver has a bent portion 11 in which the ends of the two sides forming the corner portions of portions 4 and 5 are bent in the upside down direction.
Therefore, the adjacent upper receiver parts 4 and 5 are connected without being subjected to stress that would tilt the horizontal state.

Furthermore, the upper support is provided with a frame line 13 passing through the corners of the parts 4 and 5.
Therefore, the upper support portions 4 and 5 are not subjected to any stress.

In the spring structure 1 configured in this way, an elastic body such as urethane foam is applied to the upper part 4 side surface of the compression spring 2 and the lower part 5 side surface of the compression spring 2 through a protective material (not shown). polymerize and apply this polymer to the exterior material (not shown).
It is formed into a pine tress by covering it with.

In the pinerest with the above configuration, the upper support of the compression spring 2 is used with the surface connected to the part 4 facing upward, but when the user lies down on the surface facing the part 4, the upper support is first compressed. The first spiral portion 6 of the spring 2 is softly and elastically deformed.

At this time, the second spiral portion 8 is also elastically deformed;
Since the spiral portion 8 has a smaller amount of winding than the first spiral portion 6, the amount of elastic deformation is also smaller.

Next, the load applied to the compression spring 2 is applied to the torsion part 7 after deforming the first spiral part 6 by a predetermined amount.
Since this torsion portion 7 is harder than the first spiral portion 6, it is only slightly twisted under the above load.

Moreover, the first spiral portion 6 is continuous with the torsion portion 7.
Since the winding direction of the second helical portion 8 is opposite, the torsion stress applied to the torsion portion 7 is in the opposite direction, and this also increases the hardness of the torsion portion 7, so that the compression spring 2 is The helical portion 60 is not compressed to a greater extent than the amount of elastic deformation.

Therefore, the user lying on the pinerest is supported by the first helical part 6 of the compression spring 2 with a soft feel, and the hardness of the torsion part 7 prevents the heavy part from sinking deeply into the spring structure 1. It will be done.

In addition, the frame line 3 made of band-shaped steel plates provided on the periphery of the upper and lower surfaces of the spring structure 1 makes the periphery of the spring structure 1 hard, increasing the effective usable area.
, 3, the peripheral portion of the spring structure 1 is sufficiently reinforced.

Furthermore, since the upper and lower frame lines 3, 3 made of band-shaped steel plates have much greater rigidity in the width direction than in the thickness direction, this frame line 3
, 3 prevent the spring structure 1 from shaking along the sub-direction of the frame lines 3, 3, that is, from rolling, so that the performance of the spring structure 1 can be improved.

Note that the present invention is not limited to the above-mentioned embodiment; for example, the reinforcing spring 15 provided between the upper and lower frame lines has its spring portion 14
Even if it has a semicircular shape as shown in Fig. 7, an inward V-shape as shown in Fig. 8, or an outward V-shape as shown in Fig. 9, good.

Further, the amount of winding of the first and second helical portions of the compression spring is not limited to the above-mentioned embodiment, and the point is that the amount of winding of the first helical portion is greater than that of the second helical portion.

As described above, in this invention, the receiver has parts at both ends, and between the parts, one receiver has a first spiral part continuous to the part, and the other receiver has a first spiral part continuous to the part. A compression spring in which the first helical part and the second helical part whose winding direction is opposite to each other and whose winding amount is small are continuous at a torsion part is connected in a flat plate shape to form a spring structure.

Therefore, the spring structure is elastically deformed softly against the load by the first helical part and the second marked line part of the compression spring, and exhibits hardness by the torsion part, so that the spring structure This prevents the helical part and the second marked line part from deforming more than the elastic deformation amount, giving the user a soft and pleasant feel and preventing the user's heavy parts from sinking deeply into the spring structure. support.

Furthermore, since the torsion part receives torsion stress in opposite directions from the first helical part and the second helical part whose winding directions are opposite, the torsion part exhibits great rigidity, and the support state of the user is increased. becomes certain.

[Brief explanation of the drawing]

1 to 6 show one embodiment of the present invention, FIG. 1 is a plan view showing a part of the spring structure, FIG. 2 is a side view, and FIG. 3 is shown along the line ■-■ in FIG. 4 is a perspective view of the compression spring, FIG. 5 is the same (plan view, FIG. 6 is the same side view, and FIGS. 7 to 9 each show other embodiments of the present invention. It is a side view of the reinforcement spring. 2... Compression spring, 4... First receiver part, 5... Second receiver part, 6...- ...First helical part, γ... Torsion part, 8...
Second spiral part.

Claims (1)

[Claims] 1. In a device in which a large number of compression springs are connected in a flat plate shape, and a frame line is connected to the peripheral edge of the plate-like body formed by these compression springs, the compression spring has wire rods at both ends. The annularly curved receiver has a part, and between the parts, one receiver has a first spiral part continuous to the part, and the other receiver has a first spiral part continuous to the part. A spring structure characterized in that a torsion part is continuously formed with a second helical part whose winding direction is opposite to that of the torsion part and a second helical part whose winding direction is opposite to that of the torsion part. 2. The spring structure according to claim 1, wherein the frame line is made of a band-shaped steel plate.