JP2930000B2 - Sleeper mattress - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mattress for a bed, which is a resilient Western-style mattress that is used by being placed on a bed.

[0002]

2. Description of the Related Art A bed mattress is made of a flexible polyurethane foam made of, for example, a polyol, a slight excess of diisocyanate, a cross-linking agent, a catalyst, a foaming agent, a cell size controlling agent, etc., in a single rectangular shape. Is common. Then, it is used by covering it with a bag-shaped cover or the like.

A bed mattress of this kind needs to have a certain degree of vertical shape retention strength so that the patient or the like does not sink greatly due to body pressure when lying down, and is therefore a hard material. . For this reason, a repulsive force acts in proportion to the magnitude of the weight applied to the bed mattress, and in particular, a heavy belly or head in the body receives a large repulsive force from the mattress. The repulsive force received from the mattress was biased to a part of the body, which sometimes caused bedsores early. In addition, since the bed mattress is made of a hard material, in the case of a bed in which the back floor is configured to be swingable in an up-and-down posture, when the posture of the back floor is changed to the up-and-down posture, the bed mattress is moved to the back floor. It is difficult to bend along the surface of the bed, and the repulsive force received from the bed mattress is biased to a part of the body.

In order to solve the above problem, it is conceivable to make a mattress for a bed from polyurethane made of a soft polyurethane foam having a low repulsive force.
The bed mattress can easily bend along the surface of the back floor when changing the posture of the back floor to the undulating posture, but the shape retention strength in the vertical direction is weak, so the thickness of the bed mattress in the vertical direction must be thicker This not only increases the cost, but also makes the upper surface of the bed mattress unnecessarily high, making it difficult to sleep on the bed mattress. Furthermore, because of the low repulsion, the body sinks more than necessary in proportion to the weight applied to the bed mattress, so that the body pressure cannot be dispersed to the bed mattress. The repulsive force received from the floor on which the floor mattress is laid is biased to a part of the body in the same manner as described above, which is difficult to implement.

Although the bed mattress itself is a continuous foam, it has breathability, but is required to be formed of a single sheet having a large area and to have a vertical shape-retaining strength. Since it is necessary to configure the structure so as to have a vertical thickness, it is impossible to completely remove the moisture contained in the structure, which may lead to the generation of offensive odor and mold at an early stage. To prevent this,
You need to dry the bed mattress many times a month. In particular, moving a bedridden patient to dry the bed mattress of the bedridden patient many times places a burden not only on the patient but also on a nurse.

[0006]

SUMMARY OF THE INVENTION In view of the above situation, the present invention aims to solve the problem of dispersing body pressure and avoiding bedsore in any posture without increasing the thickness. An object of the present invention is to provide a bed mattress which can be realized and has good air permeability.

[0007]

According to the present invention, at least one of the front and back surfaces of the outer frame material has an elastic property in a vertical direction and a repulsive force. A surface material having little or no repulsion is stuck and folded in a substantially U-shape so that the fiber direction is the vertical direction, and the direction of the fold is substantially the same as the width direction of the bed. The air-permeable shape-retaining member constructed as described above was provided in the outer frame material, and a ventilation hole for taking in air was formed in the outer frame material to form a bed mattress. Therefore, by elastically receiving the body with a surface material having a small or no repulsive force, the upper surface of the surface material comes into close contact with the body line, so that it is added to the bed mattress. The body pressure can be dispersed on the surface material. Then, at this time, the sinking of the bed mattress is suppressed by the shape retaining member having the shape retaining strength in the vertical direction. In addition, since the shape-retaining member is folded in a substantially U-shape, the body is supported at points at the many upper ends of the substantially U-shape, and the repulsive force received from the shape-retaining member is dispersed. It's easy. Also,
Fresh air flows into the inside through the vents of the outer frame material to dry the shape retaining member. In addition, the shape retaining member is in a state of being folded in a substantially U-shape, and the direction of the fold is substantially the same as the width direction of the bed, so that the shape retaining member is compressed in the front-rear direction of the bed. It is relatively easy to be displaced in the direction of extension or in the direction of spreading, and in the case of a bed in which the back floor is configured to be swingable in an up-and-down posture, the mattress for the bed is changed when the posture of the back floor is changed to the up-and-down posture. It is easy to bend along the surface of the back floor.

Since the surface of the surface material is formed in a corrugated shape having a convex portion and a concave portion in a cross section, a two-stage process in which the body pressure applied to the surface of the surface material is received by the convex portion and then received by the concave portion. With this configuration, the body pressure applied to the bed mattress can be more dispersed on the surface material as compared with the surface material configured with a flat surface.

It is most preferable that the outer frame material is made of polyurethane, the surface material is made of urethane foam for absorbing shock, and the shape retaining member is made of polyester.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a bed in which the back floor 1 is raised and lowered by about 80 degrees with respect to the horizontal direction, and the posture of the bed is changed. The bed includes main frames 3 and 3 supported on a rectangular base frame including a pair of left and right base frames 2 and 2 constituting a lower part so as to be able to move up and down, and a floor disposed on the main frames 3 and 3. , And casters 5 attached to boss portions 2a fixed to the front and rear sides of the base frames 2, 2, respectively.

The floor 3 is composed of the back floor 1 located on the front side of the bed, the waist floor 6 located immediately behind it, the knee floor 7 located immediately behind it, and the knee floor 7 located immediately behind it. And the leg floor 8 located on the side. The waist floor 6, the knee floor 7, and the leg floor 8 are integrated by pivotally connecting ends of the floors facing each other. The back floor 1 is configured to be capable of changing its posture from a horizontal lying posture to a rising and falling posture that is raised and lowered by about 80 degrees with respect to the horizontal lying posture.

A bed mattress 9 is to be placed on the floor 3, and the mattress 9 will be described below.

As shown in FIGS. 2 to 5, the mattress 9 has a surface material 11 having elastic properties in the vertical direction and having no repulsion on both front and back surfaces of an outer frame material 10. A breathable shape-retaining member 12 which is attached and folded in a substantially U-shape so that the fiber direction H is the vertical direction, and the direction of the fold line 12A is substantially the same as the width direction of the bed. Is provided inside the outer frame member 10 and a ventilation hole 10A for taking in air into the outer frame member 10 is formed. As shown in FIG. 10, the surface material 11 may be adhered to only one surface, and may be implemented. However, when the mattress 9 configured as described above is used by being covered with a bag-shaped cover, for example, If the surface material 11 is adhered to only one surface, the cover is opened and
It is very troublesome to check the surface on which the mattress 9 is attached, and by attaching the surface material 11 to the front and back surfaces of the outer frame material 10 as described above, With this configuration, there is an advantage that it is not necessary to check the front and back sides.

The outer frame member 10 is composed of a number of square members 10B (twelve in the figure) made of polyurethane, and these square members 10B are arranged between the adjacent square members 10B, 10B on the outer peripheral edge of the surface member 11. Are formed so as to form the ventilation holes 10A in a rectangular outer frame. Therefore, by taking in air into the interior through the ventilation holes 10A, the interior shape-retaining member 12 is prevented from having an unusual odor, mold, and the like. In addition to forming the outer frame member 10 from a large number of square members 10B, as shown in FIGS. 7 to 9, the outer frame member 10 may be formed by forming a ventilation hole 10A in a rectangular outer frame. Good.

Having an elastic property in the vertical direction, and
As the surface material 11 having no repulsive force, urethane foam for shock absorption is used, and the surface thereof is formed in a corrugated shape having a convex portion 11A and a concave portion 11B. Therefore, the body pressure is received while dispersing on the surface material 11 without generating a repulsive force against the body pressure applied on the surface material 11. The repulsive force of the surface material 11 may have a certain level as long as the body pressure can be dispersed on the surface material 11. In the figure, the projection 11A and the recess 11B are formed in the front-rear direction of the bed, but the projection 11A and the recess 11B may be formed in the left-right direction of the bed as shown in FIG.

The material of the shape-retaining member 12 has a double-wave structure in which short fibers are three-dimensionally interlaced,
There are countless gaps between the fibers, and polyester is used which is excellent in air permeability and water permeability. Therefore, by setting the body in a state where the body is supported by points at the transverse waves, that is, a large number of substantially U-shaped upper ends, the repulsive force received from the shape retaining member 12 can be dispersed and the body can be supported evenly. In addition, elasticity is exerted by a longitudinal wave so that the shape retaining member 12 does not sink unnecessarily due to body pressure.
As described above, since the fiber direction H is vertical, it is relatively easy to displace in the direction of compression or expansion in the front-back direction of the bed.
As shown by, with the back floor 1 in the undulating posture,
As shown in FIG. 6, the upper part of the shape retaining member 12 is in a compressed state, the lower part of the shape retaining member 12 is in an expanded state,
The mattress 9 is easily bent along the upper surface of the back floor 1. As a result, the occurrence of repulsive force from the mattress 9 when the mattress 9 is bent can be suppressed.

[0017]

According to the first aspect of the present invention, the body material can be elastically received by the surface material and the body pressure applied to the mattress can be dispersed on the surface material. The bedsore that occurs in such a case can be reliably prevented. In addition, the mattress is not unnecessarily sinking by the shape-retaining member whose fiber direction is the vertical direction, and the body is supported at points at a number of substantially U-shaped upper ends of the shape-retaining member. Thus, the repulsive force received from the shape retaining member can be easily dispersed, and the entire body can be uniformly received. Further, when the mattress is made of a soft material as in the related art, it is possible to prevent the thickness of the mattress from increasing in the vertical direction at the same time. In addition, since the shape-retaining member not only has air permeability but also can actively take air into the shape-retaining member provided inside the outer frame material, even a mattress having a large area and a large thickness can be used. , The shape-retaining member can be realized over a long period of time without producing odor or mold, eliminating the need to dry the mattress many times a month as in the past,
It is possible to provide a mattress with less burden for patients and nurses.

According to the second aspect, the body pressure applied to the mattress can be gradually and gradually applied to the convex portion and the concave portion, and the body pressure can be further dispersed on the surface material to be used comfortably. A mattress can be provided.

[Brief description of the drawings]

FIG. 1 is a side view of a bed showing a state in which a back floor is in an up-and-down posture;

FIG. 2 is a partially cutaway plan view of a bed mattress.

FIG. 3 is a longitudinal sectional view of a bed mattress.

FIG. 4 is a longitudinal sectional view of a main part of the bed mattress.

FIG. 5 is an exploded perspective view of a bed mattress.

FIG. 6 is a longitudinal sectional view of a main part of the bed mattress showing a bent state.

FIG. 7 is a partially cutaway plan view showing another embodiment of the bed mattress.

FIG. 8 is a longitudinal perspective view of a main part showing another embodiment of the bed mattress.

FIG. 9 is a longitudinal sectional view showing another embodiment of the bed mattress.

FIG. 10 is a longitudinal sectional view of a main part showing another embodiment of the bed mattress.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Back floor 2 Base frame 3 Main frame 4 Floor 5 Caster 6 Waist floor 7 Knee floor 8 Leg floor 9 Bed mattress 10 Outer frame material 10A Vent hole 10B Square material 11 Surface material 11A Convex part 11B Concave part 12 Member 12A Fold H Fiber direction

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A47C 27/15 A47C 27/12

Claims (3)

(57) [Claims] 1. A surface material having an elastic property in a vertical direction and having a small or no repulsive force is attached to at least one of the front and back surfaces of the outer frame material. ,
Fold in a substantially U-shape so that the fiber direction is the vertical direction,
In addition, a breathable shape retaining member configured so that the direction of the fold is substantially the same as the width direction of the bed is provided in the outer frame member, and the outer frame member is provided with a through hole for taking in air therein. Mattress for bed with pores. 2. The mattress for a bed according to claim 1, wherein the surface of the surface material is formed in a corrugated cross section having a convex portion and a concave portion. 3. A mattress for a bed according to claim 1, wherein said outer frame material is made of polyurethane, said surface material is made of urethane foam for absorbing shock, and said shape retaining member is made of polyester.