JP4096515B2 - mattress - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mattress used for a bedding.
[0002]
[Prior art]
The mattress used for the bedding is used by appropriately selecting the compression elasticity of an elastic foam having continuous or closed cells, but the soft mattress has a low compression elastic force and receives a heavy waist when it is supine. The part becomes deeper than other legs or heads.
[0003]
This is because when the load is received, the part sinks and at the same time the surrounding part of the part that received the load is pulled in, so that the surrounding part is also deformed, and the extension elastic force of the part affects the compressive elastic force of the load part. And the apparent compressive elastic force of the load portion increases. This is because the smaller the area to which the load is applied, the larger the area. As described above, the legs sink deeply, but the head and lower back are less likely to sink, causing the sleeping posture to deteriorate.
[0004]
Therefore, a load is applied to a specific part by providing a cut extending in the thickness direction on one surface of the elastic foam for the purpose of reducing the above-described elastic force of elasticity and reducing the apparent compressive elastic force of the load portion. A mattress (Japanese Patent Laid-Open No. 9-121985) was developed to prevent the adjacent portion from being pulled in. However, it is difficult to expect an increase in air permeability of the mattress because there is little expression of a gap in the elastic foam due to the opening of the notch when a load is applied.
Further, a plurality of protrusions are arranged on the upper surface of the elastic foam, and when a load is applied, the protrusions are first received by the protrusions, and the area of the support that gradually receives the load is increased as the protrusions are deformed (Japanese Utility Model Publication No. 47-26088). In the case of No.), the internal voids were reduced due to the compression due to the deformation as the load increased, and it was not possible to completely take measures against air permeability and humidity in the mattress.
[0005]
[Problems to be solved by the invention]
The present invention reduces the stretch elastic force of the load portion, thereby supporting each of the loaded portion portions independently so that adjacent portions are not affected by the stretch elastic force, An object is to obtain a mattress that can be evenly supported and can maintain good air permeability in a portion subjected to a load.
[0006]
[Means for Solving the Problems]
The mattress of the present invention is located between four protrusions adjacent to the above-mentioned Kanji shape of an elastic foam having a plurality of protrusions arranged on the surface in the weft direction at equal intervals. among them, a shallow concave portion is provided between the adjacent projections in the projection and between the weft direction adjacent to the warp direction, the form four deep recess on the inner diagonal projections, discontinuous parallel to the circumstances direction or diagonal A non-linear cut made of sine curve irregularities was provided so as to divide the protrusion from the protrusion.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a mattress of the present invention. 1A is a perspective view, FIG. 1B is a cross-sectional view taken along line BB in FIG. 1A, and C and D are plan views showing the arrangement of cuts provided on the mattress surface.
The mattress 1 of the present invention is formed by laminating elastic foams 2, 3, 4 and 5, and the uppermost elastic foam 2 has a plurality of protrusions 6 arranged in a row. In the illustrated example, the elastic foam has four layers, but the number of layers is not particularly limited, and only one layer reaching a predetermined thickness may be used. In the case of a plurality of layers, the hardness may be changed for each layer. Furthermore, a multi-spaced fiber layer (not shown) made of a nonwoven fabric or a warp knitted fabric of a structure in which a knitted fabric of two surfaces is supported by a supporting yarn with a gap is provided on the lowermost surface. It is also possible to increase the breathability and moisture resistance and to maintain the stability of the form by laminating.
[0008]
Concave portions 6 a and 6 b are formed between the plurality of protrusions 6 and 6 provided on the surface of the elastic foam 2. That shallow recess 6a in between the protrusions 6, 6 adjacent to the vertical and horizontal direction, a deep recess 6b is that exist respectively between the projections 6, 6 adjacent to the oblique direction.
[0009]
In the recesses 6a and 6b positioned between the protrusions 6 and 6, a cut 7 is made in the thickness direction of the mattress 1 to a depth that reaches the back surface of the elastic foam 5 as the lowest layer in an appropriate arrangement. . FIGS. 1C and D and FIGS. 2A and 2B show plan views of examples of the arrangement of the notches 7. As shown in FIG. 2C, the notch 7 has a sine curve-like unevenness that is non-linear in plan view. Circles shown in the figure indicate the positions of the protrusions 6, 6. In the case shown in FIG. 1C, discontinuous cuts 7 are put in the recesses 6a and 6b so as to surround the protrusions 6 one by one, and in the case shown in FIG. Two each of 6 and 6 are enclosed. The one shown in FIG. 2A has notches 7 formed in a discontinuous zigzag shape so as to follow the two protrusions 6, and the one shown in FIG. Discontinuous cuts 7 are made in a zigzag shape. In the discontinuous cut 7 as shown in FIG. 2B, small holes 8 may be provided at both ends thereof.
[0010]
A protrusion 6 is located between the notch 7 and the notch 7. In the example shown in FIG. 1C, the number of the protrusions 6 positioned between the pair of cuts 7 is one, but the number of the cuts 7 may be reduced and a plurality of protrusions 6 may be simultaneously positioned between the pair of cuts 7. There is no problem. In that case, it is the limit that three projections 6 are arranged between the two notches 7, and if it exceeds that, the projections receiving the load of the extension elastic force acting between the adjacent projections 6, 6. 6 has a large influence, the apparent compression elasticity changes, and it becomes difficult for the protrusions 6 and 6 that receive the load to uniformly support the load.
[0011]
The cut 7 is cut by appropriately pressing a blade or the like between the protrusions 6 and 6 so as to be perpendicular to the bottom surface of the elastic foam 5. By providing pipe-shaped blades at both ends of the plate-shaped blade, small holes 8 can be formed at both ends of the cut.
[0012]
As shown in FIG. 1B, the notch 7 passes through the elastic foams 2, 3, and 4 and has a rectangular shape in a side view depending on the thickness of the elastic foam. When the notch 7 is discontinuous and the small holes 8 are provided at both ends thereof, the columnar body 9 having the projection 6 at the top between the small holes 8 and 8 is between the notch 7 and the small hole 8. The continuous portions 10 are connected to each other. The presence of the connecting portion 10 has an effect of preventing one columnar body 9 from falling down due to overload, but the connecting portion 10 cannot be formed by continuous cutting.
[0013]
When a load is applied to the projection 6 at the uppermost part of the elastic foam layer having the above configuration, as shown in FIG. 3, the projection 6 is sequentially pushed down from the top and deformed, and at the same time, a notch 7 inserted between the projections opens. As a result, a gap groove 6e through which air can flow between the protrusion 6 and the gap between the protrusion 6 and the notch 7 is expressed, and it is possible to suppress the feeling of moisture being trapped in the elastic foam layer. Can be done.
[0014]
As described above, the discontinuous cut 7 has a slight continuous portion 10 around the columnar body 9, so that a load is applied to the projection 6 of the specific columnar body 9, and it is excessively contracted. When a small number of situations occur, the connecting portion 10 between the adjacent columnar bodies 9 causes a slight extension elastic force to prevent only a specific columnar body 9 from falling or buckling. When the cuts are provided, the connecting portion 10 is not formed. Therefore, the columnar body 9 of the unit surrounded by the cuts 7 is the maximum in which the protrusions 6 are arranged in two or four rows vertically and horizontally at the top. However, if 16 pieces are provided, the columnar body 9 can escape from buckling even if the continuous cuts 7 are provided. However, if the number of protrusions 6 is too large and the protrusions 6 receive a load, a stretch elastic force is generated at the peripheral edge of the top of the protrusion 6 and the load receiving part intended by the present invention uniformly supports the load. The effect cannot be demonstrated.
[0015]
Considering that the cuts 7 shown in FIGS. 1B and 1C have a straight planar shape, the columnar bodies 9 on both sides of the cut 7 can move in a swinging state. This has the effect of reducing the generation of the stretching elastic force between the adjacent columnar bodies 9, 9, but has a small blocking force against buckling and bending. However, as shown in FIG. 2C, if the notch 7 is made into a non-linear sine curve-like unevenness , there is no influence on the vertical fluctuation of the adjacent columnar bodies 9, and the movement in the horizontal direction is not affected. Can exert blocking power. However, it is also possible to exert an effect that no stretching elastic force is generated between the adjacent columnar bodies 9 and 9.
[0016]
In the notch of the arrangement shown in FIG. 1C, each columnar body having protrusions receives a load almost independently, and there is little stretching elastic force generated between adjacent columnar bodies, and it corresponds to the received load. Deformation is seen.
[0017]
In the example shown in FIG. 2A, by making zigzag discontinuous cuts connecting two columnar bodies 9, the initial state where a load of about 0 to 30 mm is started to be applied is lowered, and the amount of sinking is reduced. Deformation of about 30 mm to 60 mm is large.
[0018]
In FIG. 2B, since the recess is cut so as to surround four protrusions, the load during deformation of about 30 mm to 60 mm where the sinking amount becomes large can be kept low. In the example shown in FIG. 2C, the amount of cutting is further reduced, so that the behavior when receiving a load is close to that without cutting.
[0019]
In this way, the same material, the same protrusion shape, the notch shape, changing the notch shape, changing the initial deformation of compression, changing the deformation when the load increases to some extent, etc. Cushion material with a compression curve of
[0020]
FIG. 4 is a diagram for explaining the relationship between the cutting method and the compression curve on the elastic foam projection surface. A urethane with a constant density of 0.035 g / cm ³ , a cushion with a concavo-convex surface of 80 mm thickness, with a 10 mm shallow recess and a 20 mm deep recess between the projections, and a cut shape into the recess It is the compression curve of what changed.
1. Is not cut, that is, only uneven processing.
2. Is formed by cutting a recess so as to surround four protrusions, and can suppress a load during deformation of about 30 mm to 60 mm where the sinking amount is large.
3. Is a zigzag-shaped discontinuous notch that connects two projections into a recess (see A in FIG. 2). The initial state where the load begins to be applied, with a sinking amount of about 0 to 30 mm, is lowered, and the deformation of about 30 mm to 60 mm where the sinking amount increases is large.
[0021]
Next, the state when a load is applied to the mattress of the present invention will be described with reference to FIGS. FIG. 5 shows a load-deflection curve (hereinafter referred to as a compression curve) when an elastic foam having a thickness of 80 mm is compressed from the surface with a 200 mmφ disc based on JIS K6400. An elastic foam plane remains not subjected to surface roughened, 10 mm length in the arrangement shown in FIG. 1 D, the elastic foam notched for 65mm deep, the amount with the same sink, compression is better without cuts It can be seen that the force is large and the surface pulling force is large. Further, even when a notch having the same length and the same depth as the flat product is made in the recess between the protrusions, the compression force is larger and the surface pulling force is larger when the notch is not made at the same amount of depression.
[0022]
FIG. 6 shows the ratio of the case where the cut is made and the case where the cut is not made in FIG. 5 for the flat product and the uneven product. Except for flat products with a subsidence of 10 mm or less, even when uneven processing is performed, if the indentation is the same, the compressive force decreases, and the effect of surface pulling force due to the incision is reduced. It is clear that there are fewer.
[0023]
Moreover, it turns out that the surface tension force in the initial stage (0-10 mm) which begins to apply a load is larger on the flat surface than on the uneven processed product. From the roller exceeding 10 mm, the incision opening that has started to open is pulled, and it can be seen that when the pressure is 40 to 50 mm or more, the influence of the portion not cut in the lower part of the elastic foam is exerted.
[0024]
【The invention's effect】
The mattress of the present invention is formed by cutting a recess located between adjacent protrusions in an elastic foam having a plurality of protrusions on the surface so as to divide the protrusions and protrusions in the thickness direction of the foam. Therefore, when a load is applied to a specific protrusion, the columnar body having the protrusion repels due to its own compression elastic force. Since the connection is cut by the incision, the stretch elastic force is less likely to occur, and the mattress will be deformed according to the load only at the part receiving the load, and the sleeping posture will be lost when used as bedding. However, the protrusion receives a load at its top, but the load is dispersed and transmitted to the entire cross section of the columnar body, and the deformation appears uniformly throughout the columnar body.
[0025]
Further, since the projections on the tops of the columnar bodies first come into contact with the sleeping person, the projections also produce a massage effect and a ventilation effect due to the gap between the projections.
[0026]
When the notch is made non-linear in plan view, when a specific columnar body is deformed and shrinks, non-linear, for example, sinusoidal unevenness between adjacent columnar bodies meshes with each other to generate a guide action, Only the columnar body that receives the load is compressed only in the axial direction, and there is no occurrence of overlying buckling.
[Brief description of the drawings]
FIG. 1 shows a mattress of the present invention, in which A is a perspective view, B is a cross-sectional view taken along the line BB in FIG. 1, and C and D are plan views showing the arrangement of cuts.
FIGS. 2A and 2B are plan views showing the arrangement of cuts, and C is a plan view showing a plan shape of another example of one cut. FIG.
FIG. 3 is a longitudinal sectional view showing a state of a gap groove formed by opening a cut.
FIG. 4 is a graph showing a relationship between a compression curve and a method of making cuts on the cushion uneven surface.
FIG. 5 shows a load deflection curve when the surface is flat and when the surface has a protrusion and when the cut is not made, respectively.
FIG. 6 is a graph showing a surface tensile force reduction rate due to incision, comparing a surface having a flat surface and a surface having protrusions.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Mattress 2,3,4,5 Elastic foam 6 Protrusion 7 Notch 8 Small hole 9 Columnar body 10 Connection part

Claims (1)

An elastic foam having a plurality of protrusions arranged on the surface in the weft direction at equal intervals, located between the four protrusions adjacent to the above-mentioned Kanji shape, and adjacent to the warp direction among the four protrusions. Discontinuous signs parallel to the graticule or diagonal direction, with shallow recesses provided between adjacent projections and between adjacent projections in the weft direction, and deep recesses formed between the opposite projections on the inner diagonal of the four projections A mattress provided with a non-linear notch formed by curved irregularities so as to divide the protrusion from the protrusion.

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