JP2005152498A6 - Body pressure dispersion cushion material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid the occurrence of a state where a block element buckles and does not return when the block element falls down, and the hardness of a peripheral portion of a cushion base material that is subjected to a strong load is locally determined by a simple method. The body pressure dispersion type cushioning material in which body pressure dispersion is further promoted by, for example, increasing the body pressure is provided.
In a cushion material in which a large number of block elements 5 partitioned by grooves D are formed on the surface of a cushion base material 2 made of a soft synthetic resin foam, the grooves D are formed with respect to the grooves D of the cushion base material 2. An insert 7 made of a soft synthetic resin is inserted so as to be buried, and the block element 5 is prevented from buckling, and the hardness around the body pressure of the cushion base material 2 is changed to be hard. .
[Selection] Figure 1

Description

  The present invention relates to a cushioning material that can be used for a chair, a mattress, etc., and particularly in a type in which a block element excellent in a function of dispersing body pressure of a user or the like is formed on the surface of a cushion base material. The present invention relates to an improvement of a body pressure dispersion type cushion material having improved dispersion performance.

  Conventionally, there are various prior arts relating to various cushioning materials for receiving body pressure in a distributed manner and preventing ischemia caused by skin pulling and pressure ulcers to be developed in the future. As one of these, as shown in FIG. 8 (a), narrow grooves D 'are formed in a grid pattern or the like to form a large number of block elements 5', so that the body pressure is distributed and received or the skin is pulled. There is also a prior art for preventing ischemia caused by (see, for example, Patent Documents 1, 2, and 3).

  However, the block element 5 'partitioned by such a large number of grooves D' remains buckled as shown in FIG. 8 (c) when subjected to body pressure as shown in FIG. 8 (b). There was a problem in that it was not restored, the buffer support by the originally intended compression deformation was not made, and the intended effect could not be obtained.

For this reason, the present applicant has filed an application regarding a body pressure dispersion cushion material having an excellent body pressure dispersion force without buckling of a large number of block elements partitioned by grooves ( Japanese Patent Application No. 2003-188471), for example, those who use cushion materials, for example, there are people who have a foot injury, etc., and have to sit in a wheelchair all day, for such people In order to provide a cushioning material, it was necessary to further improve the body pressure dispersion ability.
Utility Model Registration No. 2560728 (first page, FIG. 1) JP-A-55-108325 (first page, FIGS. 1 to 5) Japanese Unexamined Patent Publication No. 2000-93263 (FIGS. 1 to 5)

  The present invention has been made from such a background, and when the block element falls down, it can be avoided that the block element buckles and does not return, and the cushion base material is subjected to a strong load. It is intended to realize a body pressure dispersion type cushion material in which the body pressure dispersion is further promoted by, for example, locally increasing the hardness of the surrounding portions by a simple method.

  That is, the body pressure dispersion type cushion material according to claim 1 is a cushion material in which a number of block elements partitioned by grooves are formed on the surface of a cushion base material made of a soft synthetic resin foam. On the other hand, an insert made of a soft synthetic resin is inserted so as to fill the groove to prevent buckling of the block element and to change the hardness around the body pressure of the cushion base material to be hard. It consists of.

  Further, the body pressure dispersion type cushion material according to claim 2 is characterized in that, in addition to the requirement according to claim 1, the insert is locally inserted around a place where a load is strongly applied. .

  Furthermore, the body pressure dispersion type cushioning material according to claim 3 surrounds the plurality of block elements at locations where the load is strongly applied to the cushion base material when the insert is inserted, in addition to the requirement of claim 1. It is characterized in that it is inserted into and disposed on.

  Furthermore, in the body pressure dispersion type cushion material according to claim 4, in addition to the requirements according to claim 1, 2, or 3, the cushion base material is made of urethane foam, while the insert has a substantially groove width. It is a band-shaped silicone resin foam having a thickness and width adapted to the depth, and the hardness of the silicone resin foam is equal to or higher than the hardness of the cushion base material at the peripheral portion where the insert is inserted. It is characterized by being.

  Furthermore, the body pressure dispersion type cushion material according to claim 5 is the cushion base material, wherein the cushion base material is stacked in a plurality of stages and positioned at the lower stage in addition to the requirements of claim 1, 2, 3 or 4. The top of the block element is fixed to the cushion base material stacked on the upper stage, and the insert is inserted into the groove with respect to one or more of the cushion base materials stacked in a plurality of stages. It is characterized by being inserted.

  Furthermore, in addition to the requirements of claim 5, the body pressure dispersion type cushion material according to claim 6 is one in which the cushion base material is stacked in two stages, of which at least the lower cushion base material Thus, the insert is inserted.

  Furthermore, the body pressure dispersion type cushion material according to claim 7 is the seat on the upper surface of the cushion base material located at the uppermost stage in addition to the requirements of claim 1, 2, 3, 4, 5 or 6. A material is laid and the top of the block element is fixed to the sheet material.

  Furthermore, in the body pressure dispersion type cushion material according to claim 8, in addition to the requirement according to claim 1, 2, 3, 4, 5, 6 or 7, the groove is adapted to the line of the user's body. The depth is different, and the portion corresponding to the protruding portion of the protrusion in the contact direction of the body contacting the cushion material is formed deeper.

  Furthermore, in the body pressure dispersion type cushioning material according to claim 9, in addition to the requirement according to claim 1, 2, 3, 4, 5, 6, 7 or 8, the cross-sectional area of the block element is the body load. Is characterized in that it is formed so as to be so wide that it is heavy.

  Furthermore, the body pressure dispersion type cushion material according to claim 10 is applied to the seat surface for a chair in addition to the requirements according to claim 1, 2, 3, 4, 5, 6, 7, 8 or 9. It is characterized by being a cushioning material.

  Furthermore, in the body pressure dispersion type cushion material according to claim 11, in addition to the requirement according to claim 10, the insert is disposed so as to surround a plurality of block elements that support the greater gluteal muscle portion of the buttocks. It is characterized by being done.

  Furthermore, the body pressure dispersion type cushion material according to claim 12 is applied to a wheelchair in addition to the requirements of claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or 11. A cushioning material for the seating surface, wherein the cushion base material is stacked in a plurality of stages, and an insert for stabilizing the body posture is disposed so as to surround the buttocks with respect to the upper cushion base material. It consists of.

The body pressure dispersion type cushion material of the present invention has the following effects by the means described above.
That is, according to the body pressure dispersion type cushion material of the first aspect, since there is an insert when the block element falls down, the block element does not buckle and does not return. Moreover, since the pushing-down of the block element is regulated by the enclosure of the insert, and the reaction force of the insert itself is applied, the apparent hardness of the cushion base material is increased. Therefore, by disposing the insert around the region where the body pressure is concentrated in the cushion base material, the body pressure dispersion performance is improved.

  Further, according to the body pressure dispersion type cushion material according to claim 2, since the insert is locally inserted in the vicinity of the place where the load is strongly applied, the hardness of the cushion base material itself is not changed and the load is strongly applied. The reaction force can be strengthened only in the vicinity. For this reason, according to the place where a load is strongly applied, a cushion that is hard as a whole is selected, and as a result, it is possible to improve a state in which it is inappropriate for a portion that requires appropriate flexibility.

  Furthermore, according to the body pressure dispersion type cushion material according to claim 3, when inserting the insert locally, it is inserted and arranged so as to surround a plurality of block elements where the load is strongly applied. Since the push-down of the block element at that location is regulated to some extent and the reaction force of the insert is added, the body pressure dispersion type is also applied to the block element surrounded by the insert and in addition to the block element around the insert The apparent hardness of the cushioning material is increased and the body pressure dispersion is improved. Furthermore, since it is an insertion installation form surrounding a plurality of block elements, the amount of inserts is small and economical, and it does not unnecessarily impede the anti-skin scratching effect of the block elements.

  Furthermore, according to the body pressure dispersion type cushion material according to claim 4, since the hardness of the insert has a hardness equal to or higher than the hardness of the cushion base material in the peripheral portion where the insert is inserted, The object plays a role like a core material (column material), and the hardness of the surrounding cushioning material into which the insert is inserted becomes apparently hard, so that effective body pressure dispersion can be performed. Further, since it is a silicone resin foam, the compression set is small, so that even when the body pressure dispersion type cushioning material is used for a long period of time, so-called sag hardly occurs.

  Furthermore, according to the body pressure dispersion type cushion material according to claim 5, since a plurality of cushion base materials are stacked, the body pressure dispersion effect is promoted and the top portion of the block element of the cushion base material located in the lower stage Is fixed to the cushion base material stacked on the upper part thereof, so that the inconvenience that the fixed block element does not buckle and recover can be solved.

  Furthermore, according to the body pressure dispersion type cushioning material of the sixth aspect, a stepwise cushioning effect can be obtained in which the body pressure dispersion type cushioning material is soft at the time of initial sinking, and is gradually hardened after sinking to some extent.

  Furthermore, according to the body pressure dispersion type cushion material according to claim 7, a sheet material is laid on the upper surface of the cushion base material located at the uppermost stage (if it is one stage, the cushion base material). On the other hand, since the top portion of the block element is fixed, the inconvenience that the compressed block element does not buckle and recover.

  Furthermore, according to the body pressure dispersion type cushion material of claim 8, the groove is deeper at the portion corresponding to the portion where the convex portion in the contact direction of the body protrudes, so that the block element is soft and easy to sink. Therefore, like a cushion base material molded into a three-dimensional concave shape to match the body line, the body pressure dispersion type cushioning material fits the user's body and has good stability and body pressure dispersion. Made. Conversely, although not completely molded into a three-dimensional concave mold, the same performance can be reproduced in a pseudo manner, and the allowable application range according to the user's body shape is wide.

  Furthermore, according to the body pressure dispersion type cushion material according to claim 9, since the cross-sectional area of the block element is formed so as to be wider as the part where the load is heavy, the part where the load is heavy is the part of the body pressure dispersion type cushion material. The reaction force becomes stronger and prevention of bottoming is promoted.

  Furthermore, according to the body pressure dispersion type cushioning material according to claim 10, since it is a cushioning material for a seating surface for a chair, the load of the body is concentrated on a small area. For example, the reaction force of the block element is locally applied. The effect of making changes is significant.

  Furthermore, according to the body pressure dispersion type cushion material according to claim 11, since the insert is inserted and disposed so as to surround a plurality of block elements that support the greater gluteal muscle part of the buttocks, the body pressure dispersion type cushion is provided. The reaction force of the part where the load is most applied to the material is enhanced, so that the body pressure is efficiently dispersed and the so-called settling of the body pressure dispersion type cushioning material is prevented.

  Furthermore, according to the body pressure dispersion type cushion material according to the twelfth aspect, it is possible to suppress the sitting posture from collapsing due to shaking during wheelchair movement.

  The best mode of the present invention is specifically described in the following examples.

The present invention will be described below based on the illustrated embodiments. What is shown by the code | symbol 1 in FIG. 1 is the body pressure dispersion type | mold cushioning material of this invention, and is an embodiment applied as a cushioning material of the seating surface C1 of the wheelchair C as an example. As shown in FIGS. 1 and 2, two cushion base materials 2 made of a soft synthetic resin foam in which a large number of block elements 5 are formed are adhered and overlapped, and the upper cushion is further laminated. Sheet material 6 is stuck on the upper surface of base material 2A. In addition, an insert 7 made of a soft synthetic resin is locally inserted in the groove D between the block elements 5 at a place where the load of the lower cushion base 2B is strongly applied, and the posture is also placed on the upper cushion base 2A. For the sake of stability, an insert 7 made of a soft synthetic resin is inserted between the grooves D between the block elements 5 so as to surround the entire flange M1, and the whole is covered with the cushion cover 8. Hereinafter, reference numeral 2A is used when referring to the upper cushion base material, and reference numeral 2B is used when referring to the lower cushion base material.
In addition, as described above, the body pressure dispersion type cushion material of the present invention is covered with the cushion cover 8 and provided to the market as a single cushion material. It is also possible to accommodate and provide as a cushion material in advance in the surface C1. Furthermore, the body pressure dispersion type cushioning material of the present invention may be applied to the seat back C2 of the wheelchair C, and may also be applied to the backrest C2. In addition, body pressure is dispersed such as a cushioning material for a mattress for bedding. It is possible to apply widely to the thing which requires the cushioning material to which is preferred.

  The cushion base material 2 will be described as an example. The upper and lower cushion base materials 2A and 2B are the same, and will be described below in common. The block element 5 defined by a large number of grooves D is formed on the upper surface of the cushion base material 2. Specifically, in the present embodiment, as shown in FIG. 3, the horizontal grooves 3 and the vertical grooves 4 are partitioned by the grooves D in a grid pattern, and the prismatic block elements 5 are formed. And the depth of the groove | channel D and the formation space | interval (namely, cross-sectional area of the block element 5) of the groove | channel D are changed according to the body line so that the body pressure of the person who seated may be disperse | distributed. That is, the groove D has a different depth in accordance with the body line of the user M, and is formed deeper as the protruding portion in the abutting direction of the body abutting against the cushion material protrudes. Furthermore, the cross-sectional area of the block element 5 is formed so as to increase as the body load increases. The grooves D are formed by cutting with, for example, a milling cutter, and the widths of the grooves D are all 5 mm. The urethane foam constituting the cushion base material 2 has a hardness of 400 N (JIS K6400) as an example in this embodiment, but when used for a seating surface C1 of a wheelchair C or the like, a hardness of 20 to 700 N (JIS K6400) is preferred.

  Specifically, as shown in FIG. 3 (b), the longitudinal groove 4 is formed deeply at a place where the thigh M2 and the buttocks M1 of both legs are placed, and 4a (10mm), 4b from the left side. (15mm), 4c (15mm), 4d (18mm), 4e (20mm), 4f (20mm), 4g (20mm), 4h (18mm), 4i (13mm), 4j (13mm), 4k (18mm), 4l (20mm), 4m (20mm), 4n (20mm), 4o (18mm), 4p (15mm), 4q (15mm), and 4r (10mm) are formed in depth (each value in parentheses is groove D) The depth of). Further, as shown in FIG. 3C, the lateral groove 3 deeply forms a place where the flange portion M1 is placed, and 3a (13mm), 3b (13mm), 3c (13mm), 3d (from the front). 13mm), 3e (10mm), 3f (10mm), 3g (13mm), 3h (18mm), 3i (20mm), 3j (20mm), 3k (20mm), 3l (20mm), 3m (20mm), 3n ( (20 mm), 3o (18 mm), 3p (13 mm), and 3q (7 mm), the depth is formed (the values in parentheses indicate the depth of the groove D, respectively).

The cross-sectional area of the block element 5 is set such that the area where the thigh M2 and the buttocks M1 of both legs are placed is set relatively wide, and the area around the area is set narrow. Further, the area where the thigh M2 and the buttocks M1 of both legs around the foot are hardly placed is set to a large area. Incidentally, if the block element 5 has a large cross-sectional area, the spring constant is large and the so-called waist is strong. On the other hand, the smaller the cross-sectional area is, the smaller the spring constant is, and the so-called waist becomes weak. As a specific numerical setting example, the horizontal width of the block element 5 partitioned by the vertical groove 4 is P1 (30 mm), P2 (10 mm), P3 (15 mm), from the left as shown in FIG. P4 (15 mm), P5 (15 mm), P6 (20 mm), P7 (20 mm), P8 (15 mm), P9 (10 mm), P10 (10 mm), P11 (10 mm), P12 (15 mm), P13 (20 mm), P14 (20 mm), P15 (15 mm), P16 (15 mm), P17 (15 mm), P18 (10 mm), and P19 (30 mm) intervals are set (the numerical values in parentheses indicate the width).
Further, the vertical width in the depth direction of the block element 5 defined by the horizontal groove 3 is Pa (40 mm), Pb (10 mm), Pc (10 mm), Pd (10 mm) from the front side as shown in FIG. Pe (10 mm), Pf (15 mm), Pg (15 mm), Ph (15 mm), Pi (20 mm), Pj (20 mm), Pk (20 mm), Pl (20 mm), Pm (20 mm), Pn (20 mm), The intervals are set to Po (15 mm), Pp (15 mm), Pq (15 mm), and Pr (25 mm) (the numerical values in parentheses indicate the vertical width, respectively).

Next, the insert 7 which is a characteristic member of the present invention will be described. As an example of the insert 7 made of a soft synthetic resin, a silicone resin foam is used. As such an insert, “NP gel (hardness: 200N (JIS K6400) equivalent ”can be applied. The insert 7 uses a strip-like material, and as an example, a material having a width of 15 mm and a thickness of 6 mm is used. As the hardness of the insert 7, it is preferable that the insert 7 has a hardness equal to or higher than the hardness of the cushion base material 2 at the peripheral portion where the insert 7 is inserted. Here, in order to avoid misunderstanding, the above-mentioned “hardness of the cushion base material 2 at the peripheral portion where the insert 7 is inserted” will be described. The “hardness of the cushion base material 2” is the cushion before being partitioned by the groove D. It does not indicate the hardness of the base material, but indicates the hardness of the cushion base material 2 after the apparent hardness after being divided by the groove D becomes soft.
Taking the insert 7 as an example, in the case of the lower cushion base material 2B, as shown in FIG. 4 (a), a large heel portion M10 of the heel portion M1 where the body pressure is the strongest (muscle portion covering the isch bone). It is inserted and installed in the said groove | channel D so that the block element 5 which supports FIG.5 (c) may be enclosed. In FIG. 4A, the insert 7 may be formed in an annular shape, or the end may be cut off. Further, as the shape of the insert 7, various shapes other than a simple smooth belt can be used as appropriate. For example, as shown in FIG. A star-shaped member such as a member having 7a or a member provided with a part 7b as shown in FIG. 7B may be used. Further, as shown in FIG. 7 (c), a belt-like material in which different kinds of materials 71, 72, 73 are laminated may be used.
The insert 7 may be partly or wholly attached to the bottom of the groove D or the like, but since the upper surface is closed by the upper cushion base 2A, the insert 7 is not particularly attached. It is also possible. On the other hand, in the case of the upper cushion base 2A, the insert 7 is installed so as to enclose the entire heel portion M1 in a heel shape from the left and right as shown in FIG. With respect to the insert 7 of the upper cushion base 2A, it may be partly or entirely attached to the bottom of the groove D or the like, and the upper surface is closed by the upper sheet material 6, It is also possible to carry out without particularly sticking.
The insert 7 installed in the lower cushion base material 2B mainly encloses the block element 5 to restrict the push-down of the block element 5 somewhat, or by adding the reaction force of the insert 7 itself, The apparent hardness of the lower cushion base material 2B is increased to improve body pressure dispersion. On the other hand, since the insert 7 installed on the upper cushion base 2A is mainly used on the wheelchair C, the insert 7 is supported so that the posture of the wheelchair C does not collapse due to the sideways swinging of the wheelchair C or back and forth. It is provided to improve. In addition, in order to mainly support the body against rolling, the vicinity of the front and rear center of the insert 7 provided in a rectangular shape is interrupted.
As the insert 7, in addition to the silicone gel foam as described above, an unfoamed silicone gel can be used. As such an unfoamed silicone gel, the stock of the present applicant is used. “Θ-6 (Hardness: 30 (Asker C))” manufactured and sold by Geltec is applicable.
In addition, when the body pressure dispersion type cushion material of the present invention is used for the seating surface C1 of the wheelchair C or the like, the insert 7 preferably has a hardness of about 20 to 700 N on the basis of JIS K6400.

The sheet material 6 will be described. As an example, the sheet material 6 uses a low-rebound soft synthetic resin foam whose upper and lower surfaces are smooth, and specifically, a low-resilience urethane foam can be applied. The low-resilience urethane foam has the characteristic of high viscoelasticity, and when it is pressed with a hand, it will slowly sink, and when released, it will slowly recover. Accordingly, the sheet material 6 itself also has an effect of dispersing and receiving body pressure by viscoelasticity. As the sheet material 6, it is possible to use a synthetic resin film having a small thickness in addition to using such a soft resin foam having low resilience.
The sheet material 6 having the above-described configuration is laid on the upper portion of the cushion base material 2, and the top portion 5 a of the block element 5 is fixed to the back surface of the sheet material 6. For fixing the top 5a of the block element 5 and the sheet material 6, specifically, as an example, it is preferable to apply an adhesive to the entire bottom surface of the sheet material 6 and attach it to the top 5a of the block element 5. Of course, an adhesive may be applied to the top 5 a side of the block element 5 using a roller or the like, or an adhesive may be applied to both the sheet material 6 and the block element 5. Further, in addition to applying the adhesive to the entire bottom surface of the sheet material 6 or the top 5 a of the block element 5, the adhesive is partially applied to the sheet material 6 or the block element 5 like only the peripheral part and the central part. It may be. Of course, when fixing the top portion 5a of the block element 5 and the back surface of the sheet material 6, the adhesive state may be fixed by an adhesive beyond the adhesive state.

The body pressure dispersion type cushion material 1 of the present invention is configured as described above, and this use mode will be described below.
(I) Body Pressure Dispersion Since the insert 7 is provided so as to surround the block element 5 where the load is most applied to the body pressure dispersion cushion material 1 as a feature of the present invention, the block element 5 at that place is provided. Since the push-down of the insert 7 is restricted to some extent and the reaction force of the insert 7 is applied, the body pressure distribution type is also applied to the block element 7 surrounded by the insert 7 and the block element 7 in the vicinity of the insert 7 in addition thereto. The apparent hardness of the cushion material 1 is increased and the body pressure dispersion performance is improved. Further, the depth of the groove D is different according to the body line of the cushion base material 2, the groove D is deep where the protrusions of the heel part M1 and the thigh M2 protrude, and the block element 5 is flexible and sinks. Since the cushion material 2 is molded into a three-dimensional concave shape in accordance with the shape of the buttocks M1 and the thigh M2, the body pressure dispersion type cushioning material 1 is the buttocks M1 of the user M. And it fits to the thigh M2, and stability is good, and body pressure dispersion | distribution is made (refer Fig.5 (a) (b)). In addition to this, the fact that the cross-sectional area of the block element 5 is formed so as to be wider as the body is subjected to a heavy load contributes to the dispersion of body pressure. Further, since the periphery of the block element 5 having a large cross-sectional area is formed by the block element 5 having a small cross-sectional area and has flexibility, it is difficult for the skin of the outline line portion of the body to be pulled. Further, when seated in the wheelchair C, the upper cushion base material 2A is provided with a sheet material 6 of low-resilience urethane foam on the upper surface, so that it feels good when seated, and the seat material 6 also distributes body pressure. Has been made.
Further, the upper cushion base 2A is provided with an insert 7 so as to surround the buttocks M1, so that the body is supported so that the posture is not lost due to the roll of the wheelchair C or back and forth. Excellent sitting stability.
As described above, it has excellent body pressure dispersibility, so it is especially effective for people who are forced to sit on a chair such as wheelchair C every day for a long time, and is exceptionally comfortable compared to conventional cushioning materials. Can provide

(Ii) Non-buckling In addition, since the top 5a of the block element 5 is fixed by the sheet material 6, the user M stands up from a state in which the user M is sitting on the wheelchair C as shown in FIGS. 5 (a) and 5 (b). In this case, the top 5a of the block element 5 does not come into contact with the peripheral side surface of the adjacent block element 5 and can be used. Therefore, the block element 5 pressed and compressed downward by the buttocks M1 and the thigh M2 is hardly buckled and can be restored autonomously immediately.
Further, the insert 7 has a function of preventing the block element 5 from buckling and being restored from the buckled state. For example, although not shown in the figure, the upper cushion base material 2A is substantially omitted. If the insert 7 is disposed in the entire groove D where the flange M1 is placed, the upper sheet material 6 can be omitted.

Next, Table 1 and FIG. 6 show the results of comparative experiments relating to body pressure dispersion between the body pressure dispersion cushion material 1 of the present invention, another cushion material, and the case where no cushion material is used.
As a sensor for measuring the body pressure distribution in this experiment, BIG-MAT manufactured by Nitta Corporation was used, and this was measured by laying it above the cushion material laid on the seating surface C1 of the wheelchair C. The subjects were 173 cm tall, 63 kg weight, 37 years old, male. As the experimental wheelchair C, Wings One <NC-116> manufactured and sold by Nick Co., Ltd. was used.

Examples a, b, and c and comparative examples a, b, and c will be described.
Example a has a configuration in which the insert 7 is removed from the upper cushion base material 2A from the configuration of the body pressure dispersion type cushion material 1 described in FIG. Specifically, the upper cushion base material 2A (urethane foam, thickness 25 mm, hardness is about 400 N (JIS K6400)), the lower cushion base material 2B (physical properties are the same as the upper cushion base material 2A). ), An insert 7 (NP gel with a hardness of about 200 N (JIS K6400)) installed on the lower cushion base material 2B, and a sheet material 6 (low on the upper surface of the upper cushion base material 2A) It is a repellent urethane foam and has a thickness of 10 mm). Incidentally, the posture stabilization insert 7 provided in the upper cushion base material 2A of the above-described embodiment described in FIG. 2 and the like improves the posture stability against rolling or the like for the wheelchair C, and is stationary. In the body pressure dispersion effect, there is no difference in the body pressure dispersion values depending on the presence or absence of the upper insert 7.

  On the other hand, the cushion material of Comparative Example a has a configuration in which the insert 7 is removed from the lower cushion base material 2B in the body pressure dispersion type cushion material of Example a.

  Further, the body pressure dispersion type cushion material of Example b is the body pressure dispersion type cushion material of Example a, which is obtained by removing the upper cushion base material 2A to form a single cushion base material 2. In addition, the insert 7 (NP gel) is installed in the groove | channel D similarly to Example a, and the sheet | seat material 6 is affixed on the upper surface of the block element 5. FIG.

  The body pressure dispersion type cushion material of Example c is also the same as the body pressure dispersion type cushion material of Example a except that the upper cushion base material 2A is removed to form a single cushion base material 2. In addition, the insert 7 is installed in the groove | channel D similarly to Example a, The sheet | seat material 6 is affixed on the upper surface of the block element 5, However, (theta) -6 (hardness: about 30) is inserted in the insert 7. (Asker C)) is used.

  On the other hand, the cushion material of Comparative Example b is a body pressure dispersion type cushion material in which the cushion base material 2 of Examples b and c is a one-stage type, and the insert 7 is removed from the cushion base material 2. .

  Further, Comparative Example c is an experimental example in which the chair S is directly seated without a cushion material.

  It can be said from the experimental data of Table 1 and FIG. 6 that the cushion material that was most excellent in dispersion of body pressure was the body pressure dispersion type cushion material of Example a to which the present invention was applied, and the same cushion base material 2 In the case of the number of stages, the body pressure dispersion is achieved when the insert 7 is provided, and the pressure of the large collar portion M10 that applies the most load to the cushion material is reduced. Moreover, as the insert 7, the thing using NP gel is superior to the thing using (theta) -6.

It is a disassembled perspective view which shows the Example which applied the body pressure dispersion | distribution type | mold cushioning material of this invention as a cushioning material of the seat surface of a wheelchair. It is a disassembled perspective view of a body pressure dispersion type cushion material. It is the top view of a cushion base material, a front view, and a right side view. It is a top view which shows two types of installation aspects of an insertion form. It is the side view and front view which show the mode of body pressure dispersion | distribution at the time of using a body pressure dispersion | distribution type cushion material, and explanatory drawing which shows the site | part of a buttocks, a large buttocks, and a leg part in a human body. It is a pressure distribution figure which shows the comparative experiment result regarding the body pressure dispersion | distribution in the case where a body pressure dispersion | distribution type cushion material is used, the case where another cushion material is used, and the case where a cushion material is not used. It is explanatory drawing which shows the other 3 types of Example which varied the shape of the insertion part. It is explanatory drawing which shows the problem of the conventional cushion material.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Body pressure dispersion type cushion material 2 Cushion base material 2A Upper cushion base material 2B Lower cushion base material 3 Horizontal groove 3a-3q Horizontal groove 4 Vertical groove 4a-4r Vertical groove 5 Block element 5a Top part 6 Sheet material 7 Insert 7a Branch Piece 7b Nodal part 71 Heterogeneous material 72 Heterogeneous material 73 Heterogeneous material 8 Cushion cover C Wheelchair C1 Seat C2 Backrest D Groove M User M1 Buttocks M10 Large buttocks M2 Thigh P1 to P19 Each block element Width Pa ～ Pr Vertical width of each block element

Claims (12)

In the cushion material in which a large number of block elements partitioned by grooves are formed on the surface of the cushion base material made of a soft synthetic resin foam,
An insert made of a soft synthetic resin is inserted into the groove of the cushion base material so as to fill the groove, preventing buckling of the block element and increasing the hardness around the body pressure of the cushion base material. A body pressure dispersion type cushioning material characterized by being changed hard.   The body pressure dispersion type cushioning material according to claim 1, wherein the insert is locally inserted around a portion where a load is strongly applied.   2. The body pressure dispersion type cushioning material according to claim 1, wherein when inserting the insert, the cushioning base material is inserted and disposed so as to surround a plurality of block elements where the load is strongly applied to the cushion base material.   The cushion base material is made of urethane foam, while the insert is a strip-shaped silicone resin foam having a thickness and a width substantially matched to the width and depth of the groove. 4. The body pressure dispersion type cushion material according to claim 1, 2 or 3, wherein the body pressure dispersion type cushion material has a hardness equal to or higher than a hardness of a cushion base material at a peripheral portion into which an object is inserted.   The cushion base material is stacked in a plurality of stages, and the top of the block element of the cushion base material positioned in the lower stage is fixed to the cushion base material stacked in the upper stage, and further, the cushion base material stacked in the plurality of stages is used. 5. The body pressure dispersion type cushion material according to claim 1, wherein the insert is inserted into the groove with respect to one or more cushion base materials.   6. The body pressure dispersion type cushion material according to claim 5, wherein the cushion base material is stacked in two stages, and the insert is inserted into at least the lower cushion base material. .   A sheet material is laid on the upper surface of the cushion base material located at the uppermost stage, and the top portion of the block element is fixed to the sheet material. 5. The body pressure dispersion type cushion material according to 5 or 6.   The depth of the groove differs according to the line of the user's body, and the groove is formed so deep as to correspond to the protruding portion in the contact direction of the body that contacts the cushion material. The body pressure dispersion type cushioning material according to claim 1, 2, 3, 4, 5, 6 or 7.   9. The body pressure distribution type cushion according to claim 1, wherein a cross-sectional area of the block element is formed so as to be wider at a portion where a body load is heavy. Wood.   10. The body pressure dispersion type cushioning material according to claim 1, wherein the application target is a cushioning material for a seating surface for a chair.   The body pressure distribution type cushioning material according to claim 10, wherein the insert is inserted and disposed so as to surround a plurality of block elements that support the greater gluteal muscle portion of the buttocks.   The object of application is a cushion material for a wheelchair seat surface, and the cushion base material is formed by overlapping a plurality of stages, and an insert for stabilizing the posture is disposed so as to surround the buttocks with respect to the upper cushion base material. The body pressure dispersion type cushioning material according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or 11.

Images