JP2017176452A - Mattress improved in nursing care/medical suitability - Google Patents

Abstract

PROBLEM TO BE SOLVED: To develop a new mattress improved in nursing care/medical suitability as a technical problem in which a body may not sink partially when a care-receiver takes a supine posture, and it can exhibit an effect similarly even in the posture of a half sitting position while comprising such a function as the excessive pressure constriction may not be caused even in sacrum regions being multiple onset regions of bed sore.SOLUTION: A mattress 1 is formed by comprising elastic foam 2, and multiple sheet materials 3 provided between base layer elastic foam 20 and upper layer elastic foam 21. The mattress employs the usage pattern where the user P is positioned thereupon with a lying position using the elastic foam 2 as a flat state, and the usage pattern where the user P is positioned thereupon with the posture of a half sitting position by folding and raising the rear of the elastic foam 2 in the longitudinal direction. The mattress is characterized in that multiple pieces of sheet material are arranged along a longitudinal direction of the elastic foam, and at least one piece of these sheet materials is formed in an arched shape in a plan view.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a mattress with an improved effect of preventing symptoms called pressure ulcers or bedsores that may occur in a bedridden caregiver, and particularly exhibits a hammock effect even in a semi-sitting posture by so-called back-up. It relates to a mattress with improved care and medical aptitude.

  So-called bedridden elderly people and care recipients may develop floor rubbing, etc. due to continued constant posture on the bed for a long time. . Of course, if such care is given to the cared person such as a sufficient change of position or wiping of the body, the occurrence of bedsores called pressure sores can be prevented at a considerable rate, but the current public There is a limit to seeking ideal human care in the current state of care at home or at home.

  Several proposals have been made in order to prevent the occurrence of bedsores on the brace from the current situation. Many of these eyes are concentrated in the areas where bedsores occur frequently, for example, in the sacral region, and so on. Development from the viewpoint of ensuring air permeability from the viewpoint of being extremely affected is being carried out.

  By the way, the present inventor, while estimating the cause of the occurrence of bedsores, has found that not only the air permeability but also the improvement in the direction of eliminating the pressure concentration on the site where the bedsore frequently occurs is extremely effective. Obtained. From this point of view, in the case of foamed polyurethane, etc., which is generally used as a mat material for bedding, the hardness of the hard polyurethane tends to concentrate partly, causing the occurrence of bed slip On the other hand, if soft, there is an effect of pressure dispersion, and although concentration of pressure on the sacral region can be eliminated, the position of the cared person sinks and bends, causing other disorders All of them had a contradictory technical imperfection.

In view of such a background, the present inventor has further developed a technique (Patent Documents 1 and 2) for obtaining a target function by combining a buffer gel with a silicone gel, in which the applicant is already substantially involved and accumulated. By developing the application, even if the cared person takes a supine posture, the body does not sink partially, and excessive pressure concentration does not occur in the sacral region that is a frequent occurrence site of bedsores. A mat for preventing bedsores has been developed and has already been applied for patents and patents have been obtained (see Patent Documents 3, 4 and 5).
These inventions have a basic configuration in which a sheet material made of a silicone gel material is disposed between a plurality of rectangular foam mat materials stacked in the vertical direction. And by the hammock effect that holds around the cared person's body around the sheet material, when the cared person takes a supine posture, the body does not sink partially and maintains a suitable posture. In addition, it is possible to realize a situation in which excessive pressure concentration that induces bed slippage does not occur also in the sacral region that is a frequent occurrence site of bed slippage, and the technical imperfection that contradicts the above is It has been resolved.

By the way, caregivers such as bedridden elderly people and therapists may take a so-called half-sitting posture that raises the upper body during meals and medical procedures, and this posture cannot be taken by themselves. In the case of a caregiver, an electric bed with a rising function (also referred to as a back-up function) is used, and a half-sitting position is taken by standing up at a desired angle so that the head half of the mat is bent. Yes.
In this semi-sitting position, the cared person's load is concentrated near the sciatic area (sacral region, etc.), but when the mat is folded, the cared person on the sheet material as shown in FIG. The load component also acts in the width direction of the sheet material. However, in the existing sheet material, since the elongation in the width direction is very small, as a result, the hammock effect is not effectively obtained in the semi-sitting position.
Of course, if the cared person takes a semi-sitting posture for a short time, the physical burden on the cared person is small, but rehabilitation on the bed for recovery, etc. At times, a semi-sitting posture is taken for a relatively long time, resulting in a physical load on the cared person.

Japanese Patent No. 2808011 JP-A-1-299338 Japanese Patent No. 4674943 Japanese Patent No. 5200086 Japanese Patent No. 5555384

  The present invention was made in consideration of such a background, and even when the cared person takes a supine posture such as supine, the body does not sink partially (particularly the lower back), In addition, it has a function that does not cause excessive pressure concentration in the sacral region, which is a frequent occurrence site of bedsores, and is also capable of exerting the same effect in a semi-sitting position as well as a new nursing care / medical aptitude This is an attempt to develop a mattress with improved performance.

  That is, the mattress with improved care and medical aptitude according to claim 1 is provided between an elastic foam composed of a base layer elastic foam and an upper layer elastic foam, and between the base layer elastic foam and the upper layer elastic foam. The elastic foam is in a flat state, a usage form in which a user is positioned in a prone position, and the elastic foam is folded back in the longitudinal direction, and the back is raised on the elastic foam. The mattress adopts a usage form in which a user is positioned in a semi-sitting position, wherein the sheet material is arranged in plural pieces along the longitudinal direction of the elastic foam, and at least one of these sheet materials is an arch in plan view It is characterized by being formed into a shape.

  In addition to the above requirements, in the mattress with improved care / medical aptitude according to claim 2, at least one of the arch-shaped sheet materials is disposed in a semi-sitting sitting bone load region, and the arch-shaped The top direction is the end of the mattress in the longitudinal direction.

  Furthermore, in addition to the requirements of claim 1 or 2, the mattress with improved care / medical aptitude according to claim 3 has an arch shape in which the upper side and / or the lower side of the arch have curves. It is characterized by being.

  Furthermore, in addition to the requirements of claim 1 or 2, the mattress with improved care and medical aptitude according to claim 4 has an arch shape of the sheet material in which the upper side and / or the lower side of the arch has a straight line. It is characterized by being.

  Furthermore, in addition to the requirements of claim 1 or 2, the mattress with improved care and medical aptitude according to claim 5 has an arch shape in which the upper side and / or the lower side of the arch are curved and straight. It is characterized by having.

  Furthermore, in addition to the requirements of claim 1, 2, 3, 4 or 5, the mattress with improved care and medical aptitude according to claim 6 has an adhesion reinforcement hole, and this adhesion reinforcement The upper and lower mat material layers are bonded to each other at the hole portions.

  Furthermore, in addition to the requirement of claim 6, the mattress with improved care / medical aptitude according to claim 7 has a pair of bonding reinforcement holes on both sides of the intermediate portion in the longitudinal direction of the sheet material. It is characterized in that it is formed as an adhesion strengthening hole.

  Furthermore, the mattress with improved care and medical aptitude according to claim 8 is a pair of adhesion reinforcing holes provided on both sides of the sheet material in the longitudinal direction, in addition to the requirement of claim 7. It is characterized by further comprising an adhesion-strengthening hole in the middle.

  Furthermore, a mattress with improved care and medical aptitude according to claim 9 is a part of the upper layer elastic foam in addition to the requirements of claim 1, 2, 3, 4, 5, 6, 7 or 8. Is characterized by being configured as a foam block.

  Furthermore, the mattress with improved care and medical aptitude according to claim 10 is characterized in that, in addition to the requirements of claim 1, 2, 3, 4, 5, 6, 7, 8 or 9, the sheet material is made of silicone. It is made of a gel material, and is characterized by an Asuka hardness (F type) of 0 to 40 and a penetration (JISK2207) of 50 to 250.

Furthermore, the mattress with improved care and medical aptitude according to claim 11 is not limited to the requirements of claim 1, 2, 3, 4, 5, 6, 7, 8, or 9, and the sheet material is It consists of foam foam and is characterized in that its hardness (JIS K6400-2 C method) is 0.5 to 5 kN.
The above-described problems can be solved by using the configurations described in the claims.

  According to the first aspect of the present invention, even when a cared person (hereinafter referred to as a user) takes a supine position, the body does not partially sink (particularly the waist), and While having the function that excessive pressure concentration does not occur in the sacral region or the like that is a frequent occurrence site of bedsores, the same effect can be exerted even in a semi-sitting posture.

  Moreover, according to the invention of Claim 2, the hammock effect by a sheet | seat raw material can be exhibited more effectively.

  In addition, according to the third, fourth, and fifth aspects of the invention, desired deformation resistance and deformability can be exhibited by the arch structure of the sheet material.

  Furthermore, according to the invention described in claim 6, it is possible to prevent the sheet material from being displaced and to reliably exhibit the hammock effect of the sheet material.

  Further, according to the seventh aspect of the present invention, the sheet material can be prevented from being displaced at the time of use by the minimum adhesion reinforcing hole.

  Furthermore, according to the eighth aspect of the invention, it is possible to reliably prevent the sheet material from being displaced during use.

  Furthermore, according to the invention described in claim 9, the degree of freedom of deformation of the upper layer elastic foam is increased, and in particular, by arranging the foam block so as to intersect the sheet material, adjacent sheet materials via the foam block are arranged. Because of this, the hammock effect by the sheet material can be effectively exhibited.

  Furthermore, according to the invention of Claim 10 and 11, it becomes possible to exhibit the desired deformation resistance and deformability by the arch structure of the sheet material.

It is a perspective view which shows the use condition of the mattress which improved care and medical aptitude of the present invention, and is located in the posture of the half-sitting position where the user raised the upper body on the mattress, with the user lying on the mattress It shows the state. It is a disassembled perspective view of the mattress of this invention. It is the top view, front view, and side view which show the mattress of this invention. It is the front view (a) which shows the state which the user laid on the mattress of this invention, and a vertical side view (b). It is the front view (a) which shows the state located on the mattress of this invention in the position of the half-sitting position which raised the upper body, (a), A longitudinal side view (b). It is a top view which shows the various forms of a sheet | seat raw material. It is a top view which shows the various form of the adhesion reinforcement | strengthening hole formed in a sheet | seat raw material. It is a top view which shows the various arrangement | sequence form of a sheet | seat raw material. It is a disassembled perspective view which shows the mattress which made the form of the upper layer part elastic foam differ. It is a disassembled perspective view which shows the mattress which made the elastic foam 2 layer structure.

The mode for carrying out the present invention includes an embodiment described below, and includes various improved embodiments based on this technical idea.
The present invention will be specifically described below based on the illustrated embodiments. In the figure, reference numeral 1 denotes a mattress (hereinafter referred to as a mattress) with improved care and medical aptitude according to the present invention, which is laid on an appropriate bed B and the like, and the user P is mainly in a supine posture such as a supine position. This is based on the premise of a so-called half-sitting posture that raises the upper body during meals, medical treatment, rehabilitation and the like. When taking a semi-sitting posture, the mattress 1 is bent around the buttocks (maximum load portion) of the user P by, for example, the back raising function of the bed B, and the head side is raised at a desired angle. Used.

Hereinafter, the present invention will be described in detail based on basic examples shown in FIGS. The mattress 1 of the present invention includes, as main members, an elastic foam 2 formed in at least two layers and a plurality of sheet materials 3 provided between the elastic foams 2, which are covered by a cover sheet 11. It is for use.
Further, in order to improve the stability of the end sitting position, the side rigid portion 4 may be incorporated in the elastic foam 2 along the long edge portion of the mattress 1.
The sheet material 3 is an effective member for preventing bedsores and maintaining a semi-sitting posture, which is a main object of the present invention, and a portion where the sheet material 3 is provided is referred to as a pressure receiving optimization unit 5.
Of course, in actual use, the sheet 6 may be used in combination so that at least the upper surface of the cover sheet 11 can be replaced more frequently.

Each of these constituent members will be described below.
First, the elastic foam 2 has, for example, a rectangular shape having a length of 1950 mm, a width of 780 mm, and a thickness of about 50 to 200 mm, and a foamed resin such as foamed polyurethane is applied as an example of the material. These dimensions and materials are appropriately changed according to the body shape of the user P and the properties required for the mattress 1.
The base layer elastic foam 20 (the first base layer elastic foam 20a and the second base layer elastic foam 20b) and the upper layer elastic foam 21 are preferably used so as to change the hardness, and at least from the sheet material 3. It is preferable to set the upper one soft and the lower one hard. As an example, it is preferable to set the hardness of the base layer elastic foam 20 higher than the hardness of the upper layer elastic foam 21 and set the hardness of the upper layer elastic foam to 50 to 100 N (25% compression).
Further, the side hard portion 4 is formed of a foamed resin such as polyurethane foam which is harder than the base layer elastic foam 20 and the upper layer elastic foam 21.

  The elastic foam 2 and the side rigid portion 4 are preferably a non-foamed foam in which bubbles are connected from the viewpoint of air permeability and water permeability, and the non-foamed foam is a foamed resin after molding. Can be obtained by film removal treatment by a crushing method, an alkali treatment method, a blasting method or the like.

Next, the sheet material 3 has a basic shape formed in a plan view arch shape shown in FIG. 6A. The arch shape has a curved arch upper side 3a and / or arch lower side 3b. It is what you have.
For example, the maximum dimension in the length direction is set to 450 mm, the maximum dimension in the width direction is set to 80 mm, and the thickness dimension is set to about 2 mm.
In addition, as a modification example of the arch shape in which the arch upper side 3a and / or the arch lower side 3b have curves as described above, there are forms shown in FIGS. 6B and 6C.

Further, as shown in FIG. 6D, the arch shape of the sheet material 3 may be such that the arch upper side 3a and / or the arch lower side 3b has a straight line.
In addition, as a modification example of the arch shape in which the arch upper side 3a and / or the arch lower side 3b have a straight line in this way, there are forms as shown in FIGS.

Furthermore, as shown in FIG. 6G, the arch shape of the sheet material 3 may be such that the arch upper side 3a and / or the arch lower side 3b has a curve and a straight line.
In addition, as a modification example of the arch shape in which the arch upper side 3a and / or the arch lower side 3b have curves and straight lines as described above, a form as shown in FIG.

As described above, the shape of the sheet material 3 is an arch shape in plan view. From the viewpoint of the balance between the hammock effects in the supine position and the semi-sitting position, the dimensions are shown in the figure. 6, when the chord length of the arch lower side 3b is L1 and the height is H1, H1 / L1 is 0.02 to 0.5, preferably 0.05 to 0.2, and more preferably 0.8. When the chord length of the arch upper side 3a is L2 and the height is H2, H2 / L2 is 0.02 to 0.5, preferably 0.05 to 0.00. It is more effective when it is set to 3, more preferably 0.1 to 0.2.
Here, the calculation of H1 / L1 and H2 / L2 is made so that the sides on both sides connecting the arch lower side 3b and the arch upper side 3a overlap the extension line of the chord of the arch lower side 3b, as shown in FIG. 6 (b). The chord of the arch lower side 3b and the string of the arch upper side 3a are assumed to overlap each other on the same line. Accordingly, the sheet material 3 shown in FIGS. 6A, 6B, and 6C is different in the aspect of both sides connecting the arch lower side 3b and the arch upper side 3a, but H1 / L1 and H2 / L2 have the same value. It will be.
Further, a part of the sheet material 3 may be formed in a rectangular shape in a plan view as shown in FIGS. 8B, 8D, and 8E, for example, without having a arch shape in a plan view.

The material constituting the sheet material 3 is not particularly limited as long as the effects of the present invention can be obtained, but various rubbers and various gel materials are preferable, temperature dependency is small, chemical resistance, and low compression strain. From the viewpoint, a silicone gel material is more preferable. The silicone gel material is αGEL (Alphagel: registered trademark) manufactured by Taika Co., Ltd., and for example, a material having an Asuka hardness value of C0 to 40 or a penetration (JISK2207 25 ° C.) of about 50 to 250 is preferable.
The dimensions and hardness of the sheet material 3 are appropriately changed according to the body shape of the user P and the properties required for the mattress 1.
In addition to the silicone gel material, a monofoam foam may be employed as the material for the sheet material 3. In this case, it is preferable that the hardness of the foamed foam (JIS K6400-2 C method) is 0.5 to 5 kN.
The sheet material 3 preferably has an elongation (based on JIS K6251) of 50 to 500%, and more preferably 60 to 300%.
In addition, the sheet material 3 basically has the same thickness over the entire area, but taking into consideration that the pressure receiving state varies depending on the body part of the user P, the thickness is changed correspondingly, etc. It is also possible to adopt a configuration in which the corresponding pressure receiving state can be changed.

Further, the cover sheet 11 that covers the entire surface is only required to ensure air permeability as appropriate, and the texture is preferably as bulky as possible. Therefore, it is an example to which three-dimensional knitting such as so-called Russell knitting, which is close to knitting, is applicable rather than weaving. The cover sheet 11 itself is preferably removable from the mattress 1 and can be cleaned, but it is preferable to apply a cover sheet that has been further treated to further improve its therapeutic functions such as antifungal properties and antibacterial properties.
Furthermore, the sheet 6 provided on at least the upper surface of the mattress 1 can be replaced more frequently. Depending on the situation of the user P, for example, a sheet having water repellency in consideration of measures at the time of incontinence, etc. An appropriate one can be selected.

The specific form of the mattress 1 is a rectangular shape having a length of about 1950 mm and a width of about 780 mm, taking the planar shape of the elastic foam 2 as an example, and the entire thickness of the elastic foam 2 is about 50 mm to 200 mm. Further, in this embodiment, the sheet material 3 is sandwiched between the first base layer elastic foam 20a and the second base layer elastic foam 20b in the base layer elastic foam 20 so as to be provided in an embedded state. .
Further, the upper layer elastic foam 21 is overlaid on the base layer elastic foam 20, and both sides of the second base layer elastic foam 20b in the base layer elastic foam 20 are excised, thereby improving the stability of the end sitting position. A side hard portion 4 is provided. In addition, in the mattress 1 shown in FIGS. 1-5, the slope which descend | falls toward the inner side was formed in the inner side part of the side part hard part 4. FIG. Here, the end sitting position means a state where the user P is seated near the longitudinal end of the mattress 1 in a state where the mattress 1 is placed on the bed B as shown in FIG. To do.
The mattress 1 shown in FIGS. 1 to 5 has a flat bottom surface. However, in order to facilitate the back-up followability of the bed B, the mattress is placed on the bottom surface of the lowermost base layer elastic foam 20. Groove machining along the width direction of 1 may be performed.

Next, the adhesive fixing aspect of the sheet material 3 provided between the first base layer elastic foam 20a and the second base layer elastic foam 20b in the base layer elastic foam 20 as described above will be described. As shown in an enlarged view in FIG. 2, an adhesion reinforcing hole 31 is provided in the sheet material 3, and the first base layer elastic foam 20 a and the second base layer elastic foam 20 b are bonded in the adhesion reinforcing hole 31. The position is fixed securely.
As shown in FIG. 7A, such an adhesion reinforcing hole 31 basically has a form in which a pair of circular adhesion reinforcing holes 31 are formed on both sides of an intermediate portion in the longitudinal direction of the sheet material 3. Further, as shown in FIG. 7B, a square adhesion reinforcing hole 31 may be used.
Further, as shown in FIG. 7 (c), a pair of adhesion reinforcing holes 31 are provided on both sides of an intermediate portion in the longitudinal direction of the sheet material 3, and an adhesion reinforcing hole 31 is further provided between them. Good.
Furthermore, as shown in FIG. 7D, a long hole-shaped adhesion reinforcing hole 31 may be provided over substantially the entire length of the sheet material 3.

Further, the sheet material 3 is arranged in such a manner that the periphery of the seat bone sinks when the user P is in the semi-sitting position, and is perpendicular to the longitudinal direction of the elastic foam 2 and further the top of the arch ( The basic configuration is that at least two sheet materials 3 are arranged in parallel so that the arch upper side 3a side) is positioned on the leg side of the user P. More specifically, it is preferable that at least one sheet material 3 is disposed within a range of 400 mm from the center in the longitudinal direction of the mattress to the leg side and 200 mm to the head side (referred to as a semi-sitting position is the load area of the isch). This region corresponds to a region where the peri-sciatic portion (including the buttocks) sinks in the semi-sitting posture. Further, from the viewpoint of coexistence with maintaining a good sleeping posture in the normal lying position, the four sheet materials 3A, 3B, 3C, and 3D are placed in the longitudinal direction of the elastic foam 2 as shown in FIG. It is preferable to adopt a configuration in which they are arranged in parallel so as to be orthogonal to each other. Using the sheet material 3 formed in an arch shape in plan view shown in FIG. 6A, the two sheet materials 3A and 3B are The arch top (arch top side 3a side) is arranged in parallel so that it is located on the user P's head side, and the arch top (arch top side 3a side) is further located on the user P's leg side. Thus, the two sheet materials 3C and 3D are arranged in parallel.
When such an arrangement form of the sheet material 3 is adopted, as shown in FIG. 4A, the portion from the waist to the buttocks of the user P is located near the upper portion of the sheet material 3B and the sheet material 3C. It will be. Further, by adopting the arrangement form of the sheet material 3, even when the head and legs of the user P are in the reverse sleeping posture on the mattress 1, the effect of the present invention can be obtained.

  Further, as shown in FIGS. 8B to 8E, the sheet material 3 is arranged in a different direction in which the top of the arch of each sheet material 3 (the arch upper side 3a side) is located, or each sheet material 3 is arranged. The shape can be changed as appropriate. In addition, the number of sheets of the sheet material 3 can be appropriately increased or decreased. The arrangement shown in FIG. 8E is a form in which a rectangular sheet material 3E is arranged in the center of the arrangement shown in FIG. 8A (between the sheet material 3B and the sheet material 3C). Yes, in addition to the function and effect of the form shown in FIG. 8A, in the arrangement form shown in FIG. 8A, there is no sheet material 3 formed between the sheet material 3B and the sheet material 3C. Thus, the effect of reducing the drop of the buttocks into the elliptical region in plan view can be obtained.

Hereinafter, the operation principle will be described based on the basic form shown in FIGS.
(Supine posture)
The mattress 1 of the present invention is used in a state where the user P is in a supine posture as shown in FIG. 4, and the body does not sink partially in such a supine posture. In addition, excessive pressure concentration does not occur in the sacral region or the like, which is a frequently occurring site of bedsores.
That is, the mattress 1 can particularly support the waist and the like in the pressure receiving optimization unit 5, and each of the sheet materials 3A, 3B, 3C, and 3D has a load of the user P in a substantially vertical direction. Therefore, it is possible to prevent bed slip while reducing the burden on the body of the user P by the hammock-like support effect by the sheet material 3 while ensuring the body pressure dispersibility.

[Half sitting position]
Next, the behavior of the sheet material 3 in a state where the user P takes a semi-sitting posture as in the example shown in FIG. 5 will be described.
In such a semi-sitting position, as shown in FIG. 1, the mattress 1, that is, the elastic foam, is operated by, for example, operating the back raising mechanism of the bed B while the user P is in the supine position on the mattress 1. 2 is bent and raised in the longitudinal direction at the portion in contact with the periphery of the user's P bone, so that the upper body of the user P located on the user P is raised.
In the semi-sitting position, the load direction of the user P acting on each of the sheet materials 3A, 3B, 3C, and 3D is different for each sheet, and this point will be described below.

That is, as shown in FIG. 5 (a), when the user P is in the semi-sitting position on the mattress 1, the weight of the user P is first determined in the lower part of the mattress 1 around the sciatic bone. While being applied in the vertical direction as a load, a force that the upper body of the user P tries to slide down is applied to the surface of the upper layer elastic foam 21. For this reason, these resultant forces act on the sheet material 3C in a direction inclined to the leg side of the user P with respect to the vertical direction.
The state of deformation of the sheet material 3C at this time is shown in FIG. 5B, and the force that the upper body of the user P applied to the surface of the upper layer elastic foam 21 tries to slide down is the force of the sheet material 3C. In plan view, it acts from the arch lower side 3b side toward the arch upper side 3a side. At this time, the sheet material 3C is significantly deformed so that the height H1 of the arch lower side 3b and the height H2 of the arch upper side 3a are increased in the planar direction as indicated by an arrow a.
On the other hand, the load of the user P acts on the lower side in the vertical direction in the cross-sectional view of the sheet material 3C. For this reason, the sheet material 3 </ b> C is deformed so as to wrap the body of the user P as shown in the AA cross section.

The deformation mode of the sheet material 3D is substantially the same as the deformation mode of the sheet material 3C although the degree is different.
By such an action of the sheet material 3, the user P who is positioned in a semi-sitting position on the mattress 1 which has been raised is effective in the hammock effect from the waist to the periphery of the seatbone even when the body is slipped down. Therefore, the semi-sitting posture can be stably maintained.

  On the other hand, for the sheet material 3A, 3B located on the upper body side of the user P, the force that the load from the user P's back to the waist acts in the vertical direction and the upper body of the user P slide down. The resultant force of the intended force acts in a direction inclined to the leg side of the user P from the vertical direction. However, the load applied to the sheet materials 3A and 3B is small as compared to the above-mentioned state of being in the supine position where the back is not raised, and the contribution of the hammock effect is also small. For this reason, the sheet materials 3A and 3B located on the upper body side may be rectangular as shown in FIG. 8B, or the sheet material 3C of the sheet material 3C may be changed as shown in FIG. Similarly to the deformation mode, the hammock effect may be caused to function according to the resultant force by the sheet materials 3A and 3B.

[Other Examples]
Although the mattress 1 of the present invention is based on the above-described embodiment, the mattress 1 can also be formed as shown below based on the technical idea of the present invention.
First, in the embodiment shown in FIG. 9, the upper layer elastic foam 21 is divided by providing a gap portion 24 so as to intersect the portion of the pressure receiving optimization portion 5. Is the foam block 22. The foam block 22 is made of a solid elastic foam material by cutting the upper part in a slit shape to form the gap portion 24, so that a plurality of long blocks are connected at the lower portion in a state where gaps are formed. 23 are connected to each other. Note that the foam block 22 may be divided into blocks, and the foam block 22 may be arranged on the base layer elastic foam 20. Each foam block 22 is formed so as to intersect with the portion of the pressure receiving optimization portion 5, and is pulled in the width direction by the sheet material 3 while linking the sheet material 3 due to the presence of the gap portion 24 or the like. Since the operation is not impaired, the operation and effect of the pressure receiving optimization unit 5 become more remarkable.

  Further, the embodiment shown in FIG. 10 shows a mattress 1 in which the elastic foam 2 has a two-layer structure, and each of the base layer elastic foam 20 and the upper layer elastic foam 21 has a single-layer structure. The upper layer elastic foam 21 may be a solid one as shown in FIG.

DESCRIPTION OF SYMBOLS 1 Mattress 11 Cover sheet 2 Elastic foam 20 Base layer part elastic foam 20a First base layer part elastic foam 20b Second base layer part elastic foam 21 Upper layer part elastic foam 22 Foam block 23 Connection part 24 Gap part 25 Lateral gap part 3 Sheet material 3A Sheet material 3B Sheet material 3C Sheet material 3D Sheet material 3a Arch top
3b Lower side of arch 31 Adhesion reinforcement hole 4 Side hard part 5 Pressure receiving optimization part 6 Sheet B Bed P User

  The present invention relates to a mattress with an improved effect of preventing symptoms called pressure ulcers or bedsores that may occur in a bedridden caregiver, and particularly exhibits a hammock effect even in a semi-sitting posture by so-called back-up. It relates to a mattress with improved care and medical aptitude.

  So-called bedridden elderly people and care recipients may develop floor rubbing, etc. due to continued constant posture on the bed for a long time. . Of course, if such care is given to the cared person such as a sufficient change of position or wiping of the body, the occurrence of bedsores called pressure sores can be prevented at a considerable rate, but the current public There is a limit to seeking ideal human care in the current state of care at home or at home.

  Several proposals have been made in order to prevent the occurrence of bedsores on the brace from the current situation. Many of these eyes are concentrated in the areas where bedsores occur frequently, for example, in the sacral region, and so on. Development from the viewpoint of ensuring air permeability from the viewpoint of being extremely affected is being carried out.

  By the way, the present inventor, while estimating the cause of the occurrence of bedsores, has found that not only the air permeability but also the improvement in the direction of eliminating the pressure concentration on the site where the bedsore frequently occurs is extremely effective. Obtained. From this point of view, in the case of foamed polyurethane, etc., which is generally used as a mat material for bedding, the hardness of the hard polyurethane tends to concentrate partly, causing the occurrence of bed slip On the other hand, if soft, there is an effect of pressure dispersion, and although concentration of pressure on the sacral region can be eliminated, the position of the cared person sinks and bends, causing other disorders All of them had a contradictory technical imperfection.

In view of such a background, the present inventor has further developed a technique (Patent Documents 1 and 2) for obtaining a target function by combining a buffer gel with a silicone gel, in which the applicant is already substantially involved and accumulated. By developing the application, even if the cared person takes a supine posture, the body does not sink partially, and excessive pressure concentration does not occur in the sacral region that is a frequent occurrence site of bedsores. A mat for preventing bedsores has been developed and has already been applied for patents and patents have been obtained (see Patent Documents 3, 4 and 5).
These inventions have a basic configuration in which a sheet material made of a silicone gel material is disposed between a plurality of rectangular foam mat materials stacked in the vertical direction. And by the hammock effect that holds around the cared person's body around the sheet material, when the cared person takes a supine posture, the body does not sink partially and maintains a suitable posture. In addition, it is possible to realize a situation in which excessive pressure concentration that induces bed slippage does not occur also in the sacral region that is a frequent occurrence site of bed slippage, and the technical imperfection that contradicts the above is It has been resolved.

By the way, caregivers such as bedridden elderly people and therapists may take a so-called half-sitting posture that raises the upper body during meals and medical procedures, and this posture cannot be taken by themselves. In the case of a caregiver, an electric bed with a rising function (also referred to as a back-up function) is used, and a half-sitting position is taken by standing up at a desired angle so that the head half of the mat is bent. Yes.
In this semi-sitting position, the cared person's load is concentrated near the sciatic area (sacral region, etc.), but when the mat is folded, the cared person on the sheet material as shown in FIG. The load component also acts in the width direction of the sheet material. However, in the existing sheet material, since the elongation in the width direction is very small, as a result, the hammock effect is not effectively obtained in the semi-sitting position.
Of course, if the cared person takes a semi-sitting posture for a short time, the physical burden on the cared person is small, but rehabilitation on the bed for recovery, etc. At times, a semi-sitting posture is taken for a relatively long time, resulting in a physical load on the cared person.

Japanese Patent No. 2808011 JP-A-1-299338 Japanese Patent No. 4674943 Japanese Patent No. 5200086 Japanese Patent No. 5555384

  The present invention was made in consideration of such a background, and even when the cared person takes a supine posture such as supine, the body does not sink partially (particularly the lower back), In addition, it has a function that does not cause excessive pressure concentration in the sacral region, which is a frequent occurrence site of bedsores, and is also capable of exerting the same effect in a semi-sitting position as well as a new nursing care / medical aptitude This is an attempt to develop a mattress with improved performance.

That is, the mattress with improved care and medical aptitude according to claim 1 comprises an elastic foam formed in at least two layers and a plurality of sheet materials provided between the elastic foams. As a flat state, there are a usage mode in which the user is positioned in a lying position, and a usage mode in which the elastic foam is folded back in the longitudinal direction and the user is positioned in a semi-sitting position. The mattress is characterized in that the sheet material is arranged in plural pieces along the longitudinal direction of the elastic foam, and at least one of these sheet materials is formed in an arch shape in plan view. is there.

  In addition to the above requirements, in the mattress with improved care / medical aptitude according to claim 2, at least one of the arch-shaped sheet materials is disposed in a semi-sitting sitting bone load region, and the arch-shaped The top direction is the end of the mattress in the longitudinal direction.

  Furthermore, in addition to the requirements of claim 1 or 2, the mattress with improved care / medical aptitude according to claim 3 has an arch shape in which the upper side and / or the lower side of the arch have curves. It is characterized by being.

  Furthermore, in addition to the requirements of claim 1 or 2, the mattress with improved care and medical aptitude according to claim 4 has an arch shape of the sheet material in which the upper side and / or the lower side of the arch has a straight line. It is characterized by being.

  Furthermore, in addition to the requirements of claim 1 or 2, the mattress with improved care and medical aptitude according to claim 5 has an arch shape in which the upper side and / or the lower side of the arch are curved and straight. It is characterized by having.

  Furthermore, in addition to the requirements of claim 1, 2, 3, 4 or 5, the mattress with improved care and medical aptitude according to claim 6 has an adhesion reinforcement hole, and this adhesion reinforcement The upper and lower mat material layers are bonded to each other at the hole portions.

  Furthermore, in addition to the requirement of claim 6, the mattress with improved care / medical aptitude according to claim 7 has a pair of bonding reinforcement holes on both sides of the intermediate portion in the longitudinal direction of the sheet material. It is characterized in that it is formed as an adhesion strengthening hole.

  Furthermore, the mattress with improved care and medical aptitude according to claim 8 is a pair of adhesion reinforcing holes provided on both sides of the sheet material in the longitudinal direction, in addition to the requirement of claim 7. It is characterized by further comprising an adhesion-strengthening hole in the middle.

  Furthermore, a mattress with improved care and medical aptitude according to claim 9 is a part of the upper layer elastic foam in addition to the requirements of claim 1, 2, 3, 4, 5, 6, 7 or 8. Is characterized by being configured as a foam block.

  Furthermore, the mattress with improved care and medical aptitude according to claim 10 is characterized in that, in addition to the requirements of claim 1, 2, 3, 4, 5, 6, 7, 8 or 9, the sheet material is made of silicone. It is made of a gel material, and is characterized by an Asuka hardness (F type) of 0 to 40 and a penetration (JISK2207) of 50 to 250.

Furthermore, a mattress with improved care / medical suitability according to claim 11 is not limited to the requirements of claim 1, 2, 3, 4, 5, 6, 7, 8, or 9, and the sheet material is it is those made of foam onset foam body, in which hardness (JIS K6400-2 C method) is made as being a 0.5～5KN.
The above-described problems can be solved by using the configurations described in the claims.

  According to the first aspect of the present invention, even when a cared person (hereinafter referred to as a user) takes a supine position, the body does not partially sink (particularly the waist), and While having the function that excessive pressure concentration does not occur in the sacral region or the like that is a frequent occurrence site of bedsores, the same effect can be exerted even in a semi-sitting posture.

  Moreover, according to the invention of Claim 2, the hammock effect by a sheet | seat raw material can be exhibited more effectively.

  In addition, according to the third, fourth, and fifth aspects of the invention, desired deformation resistance and deformability can be exhibited by the arch structure of the sheet material.

  Furthermore, according to the invention described in claim 6, it is possible to prevent the sheet material from being displaced and to reliably exhibit the hammock effect of the sheet material.

  Further, according to the seventh aspect of the present invention, the sheet material can be prevented from being displaced at the time of use by the minimum adhesion reinforcing hole.

  Furthermore, according to the eighth aspect of the invention, it is possible to reliably prevent the sheet material from being displaced during use.

  Furthermore, according to the invention described in claim 9, the degree of freedom of deformation of the upper layer elastic foam is increased, and in particular, by arranging the foam block so as to intersect the sheet material, adjacent sheet materials via the foam block are arranged. Because of this, the hammock effect by the sheet material can be effectively exhibited.

  Furthermore, according to the invention of Claim 10 and 11, it becomes possible to exhibit the desired deformation resistance and deformability by the arch structure of the sheet material.

It is a perspective view which shows the use condition of the mattress which improved care and medical aptitude of the present invention, and is located in the posture of the half-sitting position where the user raised the upper body on the mattress, with the user lying on the mattress It shows the state. It is a disassembled perspective view of the mattress of this invention. It is the top view, front view, and side view which show the mattress of this invention. It is the front view (a) which shows the state which the user laid on the mattress of this invention, and a vertical side view (b). It is the front view (a) which shows the state located on the mattress of this invention in the position of the half-sitting position which raised the upper body, (a), A longitudinal side view (b). It is a top view which shows the various forms of a sheet | seat raw material. It is a top view which shows the various form of the adhesion reinforcement | strengthening hole formed in a sheet | seat raw material. It is a top view which shows the various arrangement | sequence form of a sheet | seat raw material. It is a disassembled perspective view which shows the mattress which made the form of the upper layer part elastic foam differ. It is a disassembled perspective view which shows the mattress which made the elastic foam 2 layer structure.

The mode for carrying out the present invention includes an embodiment described below, and includes various improved embodiments based on this technical idea.
The present invention will be specifically described below based on the illustrated embodiments. In the figure, reference numeral 1 denotes a mattress (hereinafter referred to as a mattress) with improved care and medical aptitude according to the present invention, which is laid on an appropriate bed B and the like, and the user P is mainly in a supine posture such as a supine position. This is based on the premise of a so-called half-sitting posture that raises the upper body during meals, medical treatment, rehabilitation and the like. When taking a semi-sitting posture, the mattress 1 is bent around the buttocks (maximum load portion) of the user P by, for example, the back raising function of the bed B, and the head side is raised at a desired angle. Used.

Hereinafter, the present invention will be described in detail based on basic examples shown in FIGS. The mattress 1 of the present invention includes, as main members, an elastic foam 2 formed in at least two layers and a plurality of sheet materials 3 provided between the elastic foams 2, which are covered by a cover sheet 11. It is for use.
Further, in order to improve the stability of the end sitting position, the side rigid portion 4 may be incorporated in the elastic foam 2 along the long edge portion of the mattress 1.
The sheet material 3 is an effective member for preventing bedsores and maintaining a semi-sitting posture, which is a main object of the present invention, and a portion where the sheet material 3 is provided is referred to as a pressure receiving optimization unit 5.
Of course, in actual use, the sheet 6 may be used in combination so that at least the upper surface of the cover sheet 11 can be replaced more frequently.

Each of these constituent members will be described below.
First, the elastic foam 2 has, for example, a rectangular shape having a length of 1950 mm, a width of 780 mm, and a thickness of about 50 to 200 mm, and a foamed resin such as foamed polyurethane is applied as an example of the material. These dimensions and materials are appropriately changed according to the body shape of the user P and the properties required for the mattress 1.
The base layer elastic foam 20 (the first base layer elastic foam 20a and the second base layer elastic foam 20b) and the upper layer elastic foam 21 are preferably used so as to change the hardness, and at least from the sheet material 3. It is preferable to set the upper one soft and the lower one hard. As an example, it is preferable to set the hardness of the base layer elastic foam 20 higher than the hardness of the upper layer elastic foam 21 and set the hardness of the upper layer elastic foam to 50 to 100 N (25% compression).
Further, the side hard portion 4 is formed of a foamed resin such as polyurethane foam which is harder than the base layer elastic foam 20 and the upper layer elastic foam 21.

  The elastic foam 2 and the side rigid portion 4 are preferably a non-foamed foam in which bubbles are connected from the viewpoint of air permeability and water permeability, and the non-foamed foam is a foamed resin after molding. Can be obtained by film removal treatment by a crushing method, an alkali treatment method, a blasting method or the like.

Next, the sheet material 3 has a basic shape formed in a plan view arch shape shown in FIG. 6A. The arch shape has a curved arch upper side 3a and / or arch lower side 3b. It is what you have.
For example, the maximum dimension in the length direction is set to 450 mm, the maximum dimension in the width direction is set to 80 mm, and the thickness dimension is set to about 2 mm.
In addition, as a modification example of the arch shape in which the arch upper side 3a and / or the arch lower side 3b have curves as described above, there are forms shown in FIGS. 6B and 6C.

Further, as shown in FIG. 6D, the arch shape of the sheet material 3 may be such that the arch upper side 3a and / or the arch lower side 3b has a straight line.
In addition, as a modification example of the arch shape in which the arch upper side 3a and / or the arch lower side 3b have a straight line in this way, there are forms as shown in FIGS.

Furthermore, as shown in FIG. 6G, the arch shape of the sheet material 3 may be such that the arch upper side 3a and / or the arch lower side 3b has a curve and a straight line.
In addition, as a modification example of the arch shape in which the arch upper side 3a and / or the arch lower side 3b have curves and straight lines as described above, a form as shown in FIG.

As described above, the shape of the sheet material 3 is an arch shape in plan view. From the viewpoint of the balance between the hammock effects in the supine position and the semi-sitting position, the dimensions are shown in the figure. 6, when the chord length of the arch lower side 3b is L1 and the height is H1, H1 / L1 is 0.02 to 0.5, preferably 0.05 to 0.2, and more preferably 0.8. When the chord length of the arch upper side 3a is L2 and the height is H2, H2 / L2 is 0.02 to 0.5, preferably 0.05 to 0.00. It is more effective when it is set to 3, more preferably 0.1 to 0.2.
Here, the calculation of H1 / L1 and H2 / L2 is made so that the sides on both sides connecting the arch lower side 3b and the arch upper side 3a overlap the extension line of the chord of the arch lower side 3b, as shown in FIG. 6 (b). The chord of the arch lower side 3b and the string of the arch upper side 3a are assumed to overlap each other on the same line. Accordingly, the sheet material 3 shown in FIGS. 6A, 6B, and 6C is different in the aspect of both sides connecting the arch lower side 3b and the arch upper side 3a, but H1 / L1 and H2 / L2 have the same value. It will be.
Further, a part of the sheet material 3 may be formed in a rectangular shape in a plan view as shown in FIGS. 8B, 8D, and 8E, for example, without having a arch shape in a plan view.

The material constituting the sheet material 3 is not particularly limited as long as the effects of the present invention can be obtained, but various rubbers and various gel materials are preferable, temperature dependency is small, chemical resistance, and low compression strain. From the viewpoint, a silicone gel material is more preferable. The silicone gel material is αGEL (Alphagel: registered trademark) manufactured by Taika Co., Ltd., and for example, a material having an Asuka hardness value of C0 to 40 or a penetration (JISK2207 25 ° C.) of about 50 to 250 is preferable.
The dimensions and hardness of the sheet material 3 are appropriately changed according to the body shape of the user P and the properties required for the mattress 1.
As the material for the sheet material 3 in addition to the silicone gel material, it can also be employed Dokuawahatsu foam body. In this case, it is preferable that the hardness of the Dokuawahatsu foam body (JIS K6400-2 C method) is 0.5～5KN.
The sheet material 3 preferably has an elongation (based on JIS K6251) of 50 to 500%, and more preferably 60 to 300%.
In addition, the sheet material 3 basically has the same thickness over the entire area, but taking into consideration that the pressure receiving state varies depending on the body part of the user P, the thickness is changed correspondingly, etc. It is also possible to adopt a configuration in which the corresponding pressure receiving state can be changed.

Further, the cover sheet 11 that covers the entire surface is only required to ensure air permeability as appropriate, and the texture is preferably as bulky as possible. Therefore, it is an example to which three-dimensional knitting such as so-called Russell knitting, which is close to knitting, is applicable rather than weaving. The cover sheet 11 itself is preferably removable from the mattress 1 and can be cleaned, but it is preferable to apply a cover sheet that has been further treated to further improve its therapeutic functions such as antifungal properties and antibacterial properties.
Furthermore, the sheet 6 provided on at least the upper surface of the mattress 1 can be replaced more frequently. Depending on the situation of the user P, for example, a sheet having water repellency in consideration of measures at the time of incontinence, etc. An appropriate one can be selected.

The specific form of the mattress 1 is a rectangular shape having a length of about 1950 mm and a width of about 780 mm, taking the planar shape of the elastic foam 2 as an example, and the entire thickness of the elastic foam 2 is about 50 mm to 200 mm. Further, in this embodiment, the sheet material 3 is sandwiched between the first base layer elastic foam 20a and the second base layer elastic foam 20b in the base layer elastic foam 20 so as to be provided in an embedded state. .
Further, the upper layer elastic foam 21 is overlaid on the base layer elastic foam 20, and both sides of the second base layer elastic foam 20b in the base layer elastic foam 20 are excised, thereby improving the stability of the end sitting position. A side hard portion 4 is provided. In addition, in the mattress 1 shown in FIGS. 1-5, the slope which descend | falls toward the inner side was formed in the inner side part of the side part hard part 4. FIG. Here, the end sitting position means a state where the user P is seated near the longitudinal end of the mattress 1 in a state where the mattress 1 is placed on the bed B as shown in FIG. To do.
The mattress 1 shown in FIGS. 1 to 5 has a flat bottom surface. However, in order to facilitate the back-up followability of the bed B, the mattress is placed on the bottom surface of the lowermost base layer elastic foam 20. Groove machining along the width direction of 1 may be performed.

Next, the adhesive fixing aspect of the sheet material 3 provided between the first base layer elastic foam 20a and the second base layer elastic foam 20b in the base layer elastic foam 20 as described above will be described. As shown in an enlarged view in FIG. 2, an adhesion reinforcing hole 31 is provided in the sheet material 3, and the first base layer elastic foam 20 a and the second base layer elastic foam 20 b are bonded in the adhesion reinforcing hole 31. The position is fixed securely.
As shown in FIG. 7A, such an adhesion reinforcing hole 31 basically has a form in which a pair of circular adhesion reinforcing holes 31 are formed on both sides of an intermediate portion in the longitudinal direction of the sheet material 3. Further, as shown in FIG. 7B, a square adhesion reinforcing hole 31 may be used.
Further, as shown in FIG. 7 (c), a pair of adhesion reinforcing holes 31 are provided on both sides of an intermediate portion in the longitudinal direction of the sheet material 3, and an adhesion reinforcing hole 31 is further provided between them. Good.
Furthermore, as shown in FIG. 7D, a long hole-shaped adhesion reinforcing hole 31 may be provided over substantially the entire length of the sheet material 3.

Further, the sheet material 3 is arranged in such a manner that the periphery of the seat bone sinks when the user P is in the semi-sitting position, and is perpendicular to the longitudinal direction of the elastic foam 2 and further the top of the arch ( The basic configuration is that at least two sheet materials 3 are arranged in parallel so that the arch upper side 3a side) is positioned on the leg side of the user P. More specifically, it is preferable that at least one sheet material 3 is disposed within a range of 400 mm from the center in the longitudinal direction of the mattress to the leg side and 200 mm to the head side (referred to as a semi-sitting position is the load area of the isch). This region corresponds to a region where the peri-sciatic portion (including the buttocks) sinks in the semi-sitting posture. Further, from the viewpoint of coexistence with maintaining a good sleeping posture in the normal lying position, the four sheet materials 3A, 3B, 3C, and 3D are placed in the longitudinal direction of the elastic foam 2 as shown in FIG. It is preferable to adopt a configuration in which they are arranged in parallel so as to be orthogonal to each other. Using the sheet material 3 formed in an arch shape in plan view shown in FIG. 6A, the two sheet materials 3A and 3B are The arch top (arch top side 3a side) is arranged in parallel so that it is located on the user P's head side, and the arch top (arch top side 3a side) is further located on the user P's leg side. Thus, the two sheet materials 3C and 3D are arranged in parallel.
When such an arrangement form of the sheet material 3 is adopted, as shown in FIG. 4A, the portion from the waist to the buttocks of the user P is located near the upper portion of the sheet material 3B and the sheet material 3C. It will be. Further, by adopting the arrangement form of the sheet material 3, even when the head and legs of the user P are in the reverse sleeping posture on the mattress 1, the effect of the present invention can be obtained.

  Further, as shown in FIGS. 8B to 8E, the sheet material 3 is arranged in a different direction in which the top of the arch of each sheet material 3 (the arch upper side 3a side) is located, or each sheet material 3 is arranged. The shape can be changed as appropriate. In addition, the number of sheets of the sheet material 3 can be appropriately increased or decreased. The arrangement shown in FIG. 8E is a form in which a rectangular sheet material 3E is arranged in the center of the arrangement shown in FIG. 8A (between the sheet material 3B and the sheet material 3C). Yes, in addition to the function and effect of the form shown in FIG. 8A, in the arrangement form shown in FIG. 8A, there is no sheet material 3 formed between the sheet material 3B and the sheet material 3C. Thus, the effect of reducing the drop of the buttocks into the elliptical region in plan view can be obtained.

Hereinafter, the operation principle will be described based on the basic form shown in FIGS.
(Supine posture)
The mattress 1 of the present invention is used in a state where the user P is in a supine posture as shown in FIG. 4, and the body does not sink partially in such a supine posture. In addition, excessive pressure concentration does not occur in the sacral region or the like, which is a frequently occurring site of bedsores.
That is, the mattress 1 can particularly support the waist and the like in the pressure receiving optimization unit 5, and each of the sheet materials 3A, 3B, 3C, and 3D has a load of the user P in a substantially vertical direction. Therefore, it is possible to prevent bed slip while reducing the burden on the body of the user P by the hammock-like support effect by the sheet material 3 while ensuring the body pressure dispersibility.

[Half sitting position]
Next, the behavior of the sheet material 3 in a state where the user P takes a semi-sitting posture as in the example shown in FIG. 5 will be described.
In such a semi-sitting position, as shown in FIG. 1, the mattress 1, that is, the elastic foam, is operated by, for example, operating the back raising mechanism of the bed B while the user P is in the supine position on the mattress 1. 2 is bent and raised in the longitudinal direction at the portion in contact with the periphery of the user's P bone, so that the upper body of the user P located on the user P is raised.
In the semi-sitting position, the load direction of the user P acting on each of the sheet materials 3A, 3B, 3C, and 3D is different for each sheet, and this point will be described below.

That is, as shown in FIG. 5 (a), when the user P is in the semi-sitting position on the mattress 1, the weight of the user P is first determined in the lower part of the mattress 1 around the sciatic bone. While being applied in the vertical direction as a load, a force that the upper body of the user P tries to slide down is applied to the surface of the upper layer elastic foam 21. For this reason, these resultant forces act on the sheet material 3C in a direction inclined to the leg side of the user P with respect to the vertical direction.
The state of deformation of the sheet material 3C at this time is shown in FIG. 5B, and the force that the upper body of the user P applied to the surface of the upper layer elastic foam 21 tries to slide down is the force of the sheet material 3C. In plan view, it acts from the arch lower side 3b side toward the arch upper side 3a side. At this time, the sheet material 3C is significantly deformed so that the height H1 of the arch lower side 3b and the height H2 of the arch upper side 3a are increased in the planar direction as indicated by an arrow a.
On the other hand, the load of the user P acts on the lower side in the vertical direction in the cross-sectional view of the sheet material 3C. For this reason, the sheet material 3 </ b> C is deformed so as to wrap the body of the user P as shown in the AA cross section.

The deformation mode of the sheet material 3D is substantially the same as the deformation mode of the sheet material 3C although the degree is different.
By such an action of the sheet material 3, the user P who is positioned in a semi-sitting position on the mattress 1 which has been raised is effective in the hammock effect from the waist to the periphery of the seatbone even when the body is slipped down. Therefore, the semi-sitting posture can be stably maintained.

  On the other hand, for the sheet material 3A, 3B located on the upper body side of the user P, the force that the load from the user P's back to the waist acts in the vertical direction and the upper body of the user P slide down. The resultant force of the intended force acts in a direction inclined to the leg side of the user P from the vertical direction. However, the load applied to the sheet materials 3A and 3B is small as compared to the above-mentioned state of being in the supine position where the back is not raised, and the contribution of the hammock effect is also small. For this reason, the sheet materials 3A and 3B located on the upper body side may be rectangular as shown in FIG. 8B, or the sheet material 3C of the sheet material 3C may be changed as shown in FIG. Similarly to the deformation mode, the hammock effect may be caused to function according to the resultant force by the sheet materials 3A and 3B.

[Other Examples]
Although the mattress 1 of the present invention is based on the above-described embodiment, the mattress 1 can also be formed as shown below based on the technical idea of the present invention.
First, in the embodiment shown in FIG. 9, the upper layer elastic foam 21 is divided by providing a gap portion 24 so as to intersect the portion of the pressure receiving optimization portion 5. Is the foam block 22. The foam block 22 is made of a solid elastic foam material by cutting the upper part in a slit shape to form the gap portion 24, so that a plurality of long blocks are connected at the lower portion in a state where gaps are formed. 23 are connected to each other. Note that the foam block 22 may be divided into blocks, and the foam block 22 may be arranged on the base layer elastic foam 20. Each foam block 22 is formed so as to intersect with the portion of the pressure receiving optimization portion 5, and is pulled in the width direction by the sheet material 3 while linking the sheet material 3 due to the presence of the gap portion 24 or the like. Since the operation is not impaired, the operation and effect of the pressure receiving optimization unit 5 become more remarkable.

  Further, the embodiment shown in FIG. 10 shows a mattress 1 in which the elastic foam 2 has a two-layer structure, and each of the base layer elastic foam 20 and the upper layer elastic foam 21 has a single-layer structure. The upper layer elastic foam 21 may be a solid one as shown in FIG.

DESCRIPTION OF SYMBOLS 1 Mattress 11 Cover sheet 2 Elastic foam 20 Base layer part elastic foam 20a First base layer part elastic foam 20b Second base layer part elastic foam 21 Upper layer part elastic foam 22 Foam block 23 Connection part 24 Gap part 25 Lateral gap part 3 Sheet material 3A Sheet material 3B Sheet material 3C Sheet material 3D Sheet material 3a Arch top
3b Lower side of arch 31 Adhesion reinforcement hole 4 Side hard part 5 Pressure receiving optimization part 6 Sheet B Bed P User

Claims (11)

An elastic foam composed of a base layer elastic foam and an upper layer elastic foam;
A plurality of sheet materials provided between the base layer elastic foam and the upper layer elastic foam,
The elastic foam is in a flat state, and a usage form in which a user is positioned in a supine position on the elastic foam,
In the mattress in which the elastic foam is folded up in the longitudinal direction and the back is raised, and the usage form in which the user is positioned in the semi-sitting position is taken.
Numerous pieces of the sheet material are arranged along the longitudinal direction of the elastic foam, and at least one of these sheet materials is formed in an arch shape in plan view. Mattress.
At least one sheet of the arch-shaped sheet material is disposed in the semi-sitting position of the mattress and is located on the longitudinal end of the arch-shaped top portion where the top of the arch-shaped sheet is not raised up when the mattress is used. The mattress according to claim 1, wherein the mattress has improved care and medical aptitude.
The mattress according to claim 1 or 2, wherein the arch shape of the sheet material has a curved upper side and / or lower side of the arch.
3. The mattress according to claim 1, wherein the sheet material has an arch shape in which an upper side and / or a lower side of the arch have a straight line.
The mattress according to claim 1 or 2, wherein the sheet material has an arch shape in which an upper side and / or a lower side of the arch have a curved line and a straight line.
The care sheet according to claim 1, 2, 3, 4, or 5, wherein the sheet material has an adhesion reinforcing hole, and the upper and lower mat material layers are bonded to each other at the site of the adhesion reinforcing hole. A mattress with improved medical aptitude.
7. The mattress according to claim 6, wherein the adhesion reinforcing holes are formed as a pair of adhesion reinforcing holes on both sides of an intermediate portion in the longitudinal direction of the sheet material. .
8. The care / medical aptitude according to claim 7, further comprising an adhesion reinforcing hole in the middle of a pair of adhesion reinforcing holes provided on both sides of the intermediate portion in the longitudinal direction of the sheet material. Improved mattress.
9. A mattress with improved care and medical aptitude according to claim 1, wherein a part of the upper layer elastic foam is formed as a foam block. .
The sheet material is made of a silicone gel material,
The care / medicine according to claim 1, 2, 3, 4, 5, 6, 7, 8 or 9, wherein the Asuka hardness (F type) is 0 to 40 and the penetration (JISK2207) is 50 to 250. Mattress with improved suitability.
The sheet material is made of a monofoam foam and has a hardness (JIS K6400-2).
10. The mattress with improved care / medical aptitude according to claim 1, 2, 3, 4, 5, 6, 7, 8, or 9, wherein C method) is 0.5 to 5 kN.

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