JP4912535B2 - Cushion body - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cushion material that supports a person such as bedding such as a mattress, a mattress, a pillow, and a cushion, a chair upholstery, and a vehicle seat.
[0002]
[Prior art]
Conventionally, urethane foam has been used as a cushioning material because it has elasticity and is excellent in compression recovery, but when the load bearing surface is flat, when lying on it, The weight-added part sinks deeper than the other parts, and in order to sink deeply, the part that does not take the surrounding weight is pulled and changed by the part that sinks deeply. This caused the mattress to be deformed and the body pressure distribution was not good, resulting in poor sleeping comfort.
[0003]
Furthermore, if the load bearing surface is flat, when it lies on it, it will be in surface contact with the body, and during that time it will be inferior in breathability and impair sweat absorption, causing pressure ulcers. Also occurred.
[0004]
In addition, there was a drawback that air circulation was impaired inside the urentafoam and steaming was likely to occur.
For this reason, the surface to which the load is applied is provided with wavy or protruding irregularities to support the body in the form of dots, creating air gaps between the protruding irregularities and causing the air to flow (Japanese Utility Model Publication No. 47-26088). No.), developed by applying a notch to the surface to prevent the part adjacent to the above part from sinking due to the subsidence due to compression of the part under load (Japanese Patent Laid-Open No. 9-121985) It was done.
[0005]
However, in the case where the projections and depressions are provided, if the load is excessively concentrated, the projections are compressed and the gaps between the projections and depressions disappear, air permeability cannot be expected, and the surface is notched. Even if it exists, the drawing-in to the load site | part of the adjacent site | part surface of the loaded site | part can be prevented, but the effect of a breathability improvement cannot be especially anticipated.
[0006]
However, when the above-mentioned cushion body is folded after use and stored in a closet or the like, if it is to be folded in two or three, the surface kerf and unevenness are not particularly effective for the folding operation. I hated it.
[0007]
[Problems to be solved by the invention]
In view of the above points, an object of the present invention is to obtain a cushioning material that can improve both air permeability and cushioning and can be folded.
[0008]
[Means for Solving the Problems]
A plate-like body is integrally formed in a state in which a front- side elastic foam formed by juxtaposing a plate-like body with a gap and a back-side elastic foam formed by arranging a plate-like body in the same manner as described above. and irregularities either or both of the outer surfaces of the side elastic foam and the back side elastic foam, a respective gap innermost of the front surface side elastic foam and the back side elastic foam than the width of the gap portion A conduit portion having a large diameter was formed, and the conduit portions of the front-side elastic foam and the back-side elastic foam were crossed , and the intersection was used as an air conduction path .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. In the cushion body 1 of the present invention, the front-side elastic foam 2 and the back-side elastic foam 3 are integrated, and both elastic foams 2 and 3 have or are not provided with an uneven shape 5 having protrusions 4 on the outer surface side. The planar shape 6 is used. Both elastic foams 2 and 3 have plate-like bodies 7 and 8 (in the example shown in the figure, in the shape of a strip in plan view) juxtaposed in a bowl shape, and the two plate-like bodies 7 and 8 are arranged vertically. In a state of overlapping, they intersect at right angles and are united.
[0010]
Both elastic foams 2 and 3 may be formed by excising a block of one elastic foam, or a block formed by laminating and integrating a plurality of layers with varying hardness may be excised.
[0011]
The plate-like body 7 constituting the surface-side elastic foam 2 in the illustrated example has three rows of projections 4 on the outer surface, and a gap 9 is formed between the adjacent plate-like bodies 7. The innermost part of the gap 9 is a conduit part 10 having a diameter larger than the width of the gap 9. Further, the plate-like body 8 forms a gap 11 between the adjacent plate-like bodies 8. The innermost part of the gap 11 is a conduit part 12 having a diameter larger than the width of the gap 11. The plate-like bodies 7 and 8 are provided so as to intersect as described above. Accordingly, the conduit portions 10 and 12 of the plate-like bodies 7 and 8 intersect in plan view. However, the conduit portions 10 and 12 are on the surface in contact with the plate-like bodies 7 and 8 so that there is conduction at the intersection 13. To be located. As a result, an air conduction path 14 is formed that continues from the gap 9 intersection 13 and the gap 11 and penetrates the front-side elastic foam 2 and the back-side elastic foam 3.
[0012]
When a load is applied to the front side of the cushion body of the present invention, if the urethane is made of the same and uniform material, the surface side is first deformed, and the applied load is offset by the elasticity of the urethane itself at the time of deformation. As the load reaches the inner layer of the urethane, the cancellation proceeds, the load gradually decreases, and the deformation stops when the load becomes zero. However, if the material of urethane is changed into a layer and the surface side is hardened and the inner layer side is made flexible, the deformation of the inner layer portion starts first. Therefore, depending on the purpose of use of the cushion body, it is determined whether the cushion body has a single composition or is appropriately multi-layered so as to change the pressure resistance of each layer.
[0013]
3 shows the present invention 1 and 2 in which the projection shown in FIG. 1 is formed on the surface of the cushion body 1 having a height of 80 mm (the present invention 1 has a urethane density of 0.035 g / cm ² , and the present invention 2 has a urethane density of 0.1. 040 g / cm ² ), a comparative example (provided with a protrusion of Japanese Utility Model Publication No. 47-26088 on the surface), and a flat (surface flattened) compression curve. The measurement method of a compression curve is based on the method based on JISK6400.
[0014]
According to this compression curve, the cushion body of the present invention has a large amount of sinking with respect to the same compression force as compared with a flat surface, and the flat body is linearly inclined to a compression force of about 75 g / cm ^2. In the case of a uniform urethane layer with protrusions on the surface, while the amount of subsidence is small, it shows a line extending in a shape, and the compression force is about 80 g / cm ² with a gentler slope than the flat surface. On the other hand, in the present invention, the compression force is 40 to 55 g / cm ² at the initial stage of both the first and the second, ie, the intermediate compression of the former two, i.e., the same compression force shows an intermediate sinking amount. The amount of subsidence per gram increases from the point of exceeding, and the amount of subsidence per gram decreases and the slope of the curve rises in the latter half. That is, in a specific range of loads that need to be supported, the amount of sinking is increased and softly supported, and above and below the range, the amount of sinking is reduced and given to the hardware. That is, the amount of subsidence with respect to pressure can be adjusted by the uneven shape, the thickness of the plate-like body, the interval, and the like.
[0015]
Since the cushion body of the present invention is formed by integrating the plate-like body with the back-side elastic foam formed in parallel in the same manner as the surface-side elastic foam formed in parallel with the cocoon shape with a gap therebetween, In the illustrated example, the range of nine protrusions 4 in which the plate-like body 7 on the front surface side and the plate-like body 8 on the back surface side overlap each other constitutes one block. Each block is divided into squares at the thick intermediate portion of the cushion body 1 by the innermost conduit portion 10 of the gap 9 on the front side plate-like body 7 and the innermost conduit portion 12 of the gap 11 on the rear side plate-like body 8. Therefore, each load is received and supported independently. Therefore, each block individually supports the load, and when one block sinks on the surface, a part of the adjacent block is pulled by the sinking block, and there is no pulling that sinks. .
[0016]
When the cushion body of the present invention is folded at the time of storage or the like, if it is folded at the gap portion between the plate-like body and the plate-like body, it can be easily folded at the conduit portion at the back of the gap.
[0017]
In addition, the conduit portion intersects the background in the middle layer portion of the cushion body, and since the end portion is opened on the side surface of the cushion body, the conduit portion is excellent in air permeability and is useful for preventing peeling.
[0018]
【Effect of the invention】
The cushion body of the present invention is integrally formed by crossing a front-side elastic foam body in which plate-like bodies are arranged in parallel with a cocoon shape with a gap, and a back-side foam body in which plate-like bodies are arranged in parallel as described above. Therefore, one block in which the front-side elastic foam and the back-side elastic foam are integrated is formed at the intersection, and each block is compressed when compression is applied to the cushion body. Can receive a load independently and do not receive a load adjacent to each other or do not pull in a block having a small amount of reception, and a stable support can be realized.
[0019]
In order to form the block, a conduit portion is provided at the innermost part of the gap between adjacent plate-like bodies, so that it becomes a flow path for discharging moisture and the like trapped inside the cushion body, and increases the air permeability, and the cushion body When it is folded, it can be easily folded at this portion.
[Brief description of the drawings]
FIG. 1 shows a cushion body of the present invention, in which A is a plan view, B is a front view, and C is a side view.
FIG. 2 is a bottom view of the cushion body of the present invention.
FIG. 3 shows another compression curve of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cushion body 2 Front surface side elastic foam 3 Back surface side elastic foam 4 Protrusion 5 Uneven shape 6 Planar shape 7, 8 Plate-like body 9, 11 Gap 10, 12 Conduit part

Claims (1)

Constructed integrally with the surface side elastic foam made in parallel to the grating-like planar body at a gap, on and intersecting the back surface side elastic foam made in parallel planar body similarly the surface The outer surface of one or both of the side elastic foam and the back side elastic foam is made uneven, and the innermost part of the gap between the front side elastic foam and the back side elastic foam is larger than the width of the gap. A cushion body characterized in that a conduit portion having a diameter is formed, the conduit portions of the front-side elastic foam and the back-side elastic foam are crossed, and the intersection is used as an air passage .

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