TW202011875A - Cushioning pad capable of maintaining predetermined body pressure distribution performance, enhancing seat stability and preventing slipping forward - Google Patents

Abstract

The present invention provides a cushioning pad, which may maintain a predetermined body pressure distribution performance and also have the functions for enhancing seat stability and preventing forward slipping. The cushioning pad of the present invention has a structure including a first resin layer laminated with a second resin layer. The first resin layer is provided with at least one hole portion with a bottom or without bottom and the second resin layer is provided with at least one incision pattern in an area opposite to the hole portion. The at least one incision pattern is composed of at least three linear penetrated incision grooves that are penetrated in the depth direction of the second resin layer and intersected with each other in a predetermined intersecting portion. A cantilevered flange composed of an area between the linear penetrated incision grooves adjacent to the incision pattern and the periphery of the continuous flange area at the root of the flange are both capable of elastic deformation. The flange and/or the periphery of the flange area are configured as being elastically deformed toward the hole portion and covering the opening edge of the hole portion of the first resin layer and/or at least a portion of the inner wall of the hole portion when a vertical load is acted on the incision pattern.

Description

Cushion material

Field of invention The invention relates to a cushion material used for chairs, wheelchairs, vehicle seats, mattresses, etc. and having a body pressure dispersion effect.

Background of the invention Cushion materials that improve the body pressure dispersibility by stacking a structure of a urethane foam with a low surface reflex on the surface of a urethane foam with a specific surface structure have been widely used to date For use.

The applicant proposed in Patent Documents 1 and 2 a cushion material as follows: a plurality of grooves are formed on the surface of a cushion base material composed of a soft synthetic resin foam such as a urethane foam The block member is divided, and a seat material such as a low-reflex urethane foam is placed on the upper surface layer of the cushion base material.

In Patent Document 1, the groove in the cushion base material is formed to have a depth that varies according to the body curve of the user (seated person), and reaches a convexity corresponding to the contact direction of the body contacting the cushion material Department highlights. In Patent Document 2, an insert made of a soft synthetic resin is inserted into the groove of the cushion base material to bury the groove, prevent the block member from bending, and concentrate the hardness of the periphery of the cushion base material's body pressure Hardened. When the insert is inserted, it is inserted into a plurality of block members arranged to surround the place where the load force is applied in the cushion base material.

The cushioning materials described in these Patent Documents 1 and 2 have the characteristics of significantly excellent body pressure dispersion performance, and are used in wheelchairs or mattresses in medical institutions, nursing care, welfare facilities, etc. to prevent the occurrence of skin tension Cushion material for ischemia, or decubitus ulcers arising therefrom.

On the other hand, when such a cushion material is used in a wheelchair or a mattress, the position of the ischium of the seated person gradually deviates toward the front, and so-called "forward sliding" occurs. When forward slippage occurs, the seated person may fall off the cushion material, or due to a longer period of use, the shearing force acting between the seat portion and the seated person's buttocks due to the forward slippage will be The seat occupant is deviated from the bed, and furthermore, due to the pressure from the seat buttocks and the cushion material, that is, the pressure on the buttocks buttocks of the seat occupant, it is easy for the seat occupant's internal organs or respiratory organs to be compressed. And the problem of disrupting the balance of physical condition.

In order to solve such a problem, for example, in Patent Document 3, a cushion material is proposed, which is provided with a front edge between a seat portion that receives body pressure and a seat pressure applicator portion that disperses body pressure The structure of the shaped hole serves as a buttock support that supports at least two gluteus muscles except for the sacrum, coccyx, and ischial tuberosity behind the buttocks, which can improve the support for body shaking and achieve the dispersion of body pressure.

Also, for example, Patent Document 4 proposes a cushioning material having a structure in which a bottom cushioning material and an upper cushioning material are covered with a skin material, to receive the buttocks of a seated person, and to make the bottom cushioning material higher than the upper side The cushion material is hard, and with respect to the bottom cushion material, when seated, a plurality of long-shaped slots are formed in parallel with the ischial tuberosity portion of the buttocks and the peripheral portion thereof, and the The upper cushion material is of the same material or is longer than the upper cushion material but softer than the bottom cushion material. The long-length embedded cushion material is embedded in the slot fixed to the bottom cushion material. According to the cushion material, the sitting time becomes longer, and when the seated person feels the pain caused by the compression on the peripheral part of the ischial tuberosity of the buttocks, the seated position is moved forward or backward, and the painful part is moved to Embedded above the cushion material, thereby reducing the pain caused by compression.

Further, for example, Patent Document 5 proposes a cushion material that continuously changes the reaction force of the cushion material in the front-rear direction to continuously change the body pressure distribution due to the load of the seated person. The body pressure dispersion due to the load of the seated person is good, and as a result, the sitting comfort of the seated person can be improved and the front slippage can be prevented.

Also, for example, Patent Document 6 proposes a cushion material whose cushion core material is composed of: an upper layer portion composed of a polymer gel, and a front portion disposed below the upper layer portion The front middle layer part of the high hardness low reflex polyurethane foam; the rear middle part of the low hardness low reflex polyurethane foam arranged below the upper layer part The layer portion; and the lower intermediate layer portion composed of a normal polyurethane foam disposed below the front intermediate layer portion and the rear intermediate layer portion, with the aforementioned cushion core material, having excellent body pressure dispersibility, And can prevent the buttocks from slipping before. Advanced technical literature Patent Literature

[Patent Document 1] Japanese Patent No. 4221251 [Patent Document 2] Japanese Patent No. 4221280 [Patent Document 3] Japanese Patent No. 4686678 [Patent Document 4] Japanese Patent No. 5695265 [Patent Document 5] Japanese Patent No. 5657305 [Patent Document 6] Japanese Patent No. 4104436

Summary of the invention Problems to be solved by invention As mentioned above, according to the conventional cushion material, although the body pressure dispersibility of the seated person can be improved to some extent, if you want to achieve the body pressure dispersion and prevent the seated person from slipping before, Will cause problems. This is because there is a contradictory relationship between the body pressure dispersion performance of the seated person in the cushion material and the front slip suppression effect. That is, when the body pressure dispersion performance of the seat occupant is improved, the seat stability performance of the cushion mate decreases, and as a result, the effect of suppressing forward slip of the seat occupant is reduced. In particular, as in Patent Document 3, if a step difference in hardness is provided on the seat surface portion and a portion with a larger hardness is to be made into a structure like a weir (called a positioning point) to suppress forward slip, when the hardness of the positioning point is large , The front slip prevention effect is excellent, but the body pressure dispersion effect at the positioning point is reduced, and when the hardness of the positioning point is small, the body pressure dispersion effect is excellent, but the front slip prevention effect is reduced. In addition, the anchor point is a structure that includes not only such a hardness step, but also the previous step to prevent slippage such as high and low steps.

The present invention is to solve such problems of the conventional technology, and its object is to provide a cushion material which can maintain a predetermined body pressure dispersion performance and can simultaneously suppress the seat stability and the effect of suppressing forward sliding. Means to solve the problem

According to the present invention, there is provided a cushion material having a structure in which a second resin layer is laminated on a first resin layer. The first resin layer has at least one hole portion with or without a bottom, and the second resin layer has at least one cut-out pattern at least in a region facing the hole portion, and the at least one cut-out pattern penetrates by any means At least three linear cut-through grooves intersecting each other in the thickness direction of the second resin layer and at predetermined intersections are formed. The cantilever-shaped protruding piece formed by the adjacent line of the cutting pattern penetrating the area between the cutting grooves, and the peripheral portion of the protruding piece region continuous with the root of the protruding piece are configured to be elastically deformable. The peripheral portion of the protrusion and/or the protrusion area is configured such that when a vertical load acts on the cut pattern, it elastically deforms toward the hole to cover at least a part of the opening edge of the hole and/or the inner wall of the hole.

In this manner, in the cushioning material of the present invention, the first resin layer has a hole portion, and the second resin layer deposited thereon is provided with a cutting pattern composed of at least three cutting grooves penetrating each other and intersecting each other in the thickness direction . When the vertical load acts on the cut-in pattern, the area between the cut-out grooves adjacent to the cut-out pattern, that is, the cantilever-shaped projection and the peripheral portion of the projection area continuous with the root of the projection are elastically deformed toward the aperture, and It covers at least a part of the opening edge of the hole of the first resin layer and/or the inner wall of the hole. As a result, the peripheral portions of the tabs and the tab area are bent downward to cover the opening edge and the periphery of the opening portion of the hole, so the peripheral portion of the ischium is supported by the tabs and the peripheral portion of the tab area that are bent downward. Furthermore, as the tabs are bent and deformed, the space between the adjacent tabs (the width of the cut-out portion) expands, and the ratio of the gaps between the tabs increases, thereby dispersing the body pressure of the seated person well and stabilizing the peripheral part of the ischia Supported to improve seat stability. Furthermore, when the horizontal load of the front slip is applied, at least a part of the inner wall (positioning point) of the front edge of the opening edge and/or the hole that has been bent is maintained due to maintaining the above-mentioned body pressure dispersion or seat stability The peripheral part of the tab and the tab area softly abuts and supports the front edge of the ischium of the seated person, so the movement of the ischium to the front is gently suppressed, the contact pressure with the anchor point rises rapidly, and the blood flow is partially blocked The situation will not happen, effectively suppress the front slip. In this way, according to the cushioning material of the present invention, a predetermined body pressure dispersion performance can be maintained, and at the same time, the seat stability and the effect of suppressing front slip can be simultaneously improved.

The linear penetrating cut-in groove should be composed of penetrating slots. By forming through-slots, when the load acts, the protrusions and the periphery of the protrusion area will easily bend downward to cover at least a part of the opening edge of the hole and/or the inner wall of the hole, so More effectively show the above effects.

The two aforementioned cut-in patterns are also preferably arranged at mutually different positions in the area facing the hole portion. As a result, the conformability to the shape of the user's buttocks can be improved, so that the body pressure dispersibility of the cushion material and the stability of the seat can be more improved.

In this case, the distance between the intersections of the two cut patterns linearly penetrating the cut grooves is preferably 110 to 140 mm. By this, the position of the ischium of the human body according to the statistical database or the like can be reliably reflected at the position of the predetermined linear penetration through the intersection of the cut groove provided in the second resin layer, so that the effect of suppressing the front slip of the seated person can be obtained Improve more surely.

The second resin layer is also preferably provided with: a plurality of linear through-cut grooves penetrating the second resin layer or a linear non-penetrating cut-through groove that does not penetrate the second resin layer, and the plurality of linear penetrating cuts through the second resin layer The groove or the linear non-penetrating cut groove that does not penetrate the second resin layer is parallel to the straight line between the intersections of the linear penetrating grooves connecting the two cut patterns, and is formed at a predetermined distance from the intersection. Thereby, since the protrusion and the peripheral portion of the protrusion area are easily bent and deformed, and the apparent hardness is also reduced, it is easy to cover at least the opening edge of the hole of the first resin layer and/or at least the inner wall of the hole In part, when the load acts on the opening edge and/or the inner wall, it can be supported with a low body pressure, so that the front slip suppression effect and the body pressure dispersion can be further improved at the same time. Furthermore, the position of the ischial position of each person's human body can be matched so that the position of the intersection of the line of the cut pattern formed in the second resin layer through the cut groove and the position of the ischium of the seated person can be more appropriately and precisely opposed Therefore, a cushion material corresponding to each person's body shape can be produced, and the body pressure dispersion performance of the seated person and the suppression effect of the previous slip of the seated person can be further improved according to the body shape of each person. Furthermore, if the second resin layer has a plurality of straight through cut-through grooves penetrating through it, the cut-out pattern has any configuration such that a part of the cantilever-shaped protrusion does not fall off.

The three cut patterns should also be arranged at mutually different positions in the area facing the hole. By increasing the number of cut patterns provided in the second resin layer, the position of the intersection of these cut patterns and the position of the ischium of the occupant can be more accurately matched, so it can accurately correspond to the body shape of each person , And the improvement of the body pressure dispersion performance of the seated person and the suppression effect of the seated person's previous slip.

The cut-in pattern should be: if there is one hole part, it should be one cut-out pattern provided at the position opposite to the center part of the hole part, and each of the two regions divided into two parts of the hole part and seating 2 cut patterns at the position opposite to the ischial bone, or 3 cut patterns provided at the position opposite to the 3 areas dividing the hole portion 3, of which 2 cut patterns are shown at the position opposite to the seated person The position of the ischium. In addition, if there are two hole portions, the cut patterns are preferably two cut patterns provided at positions facing each of the two hole portions and the ischium of the seated person. Furthermore, if there are three hole parts, the cut patterns are also preferably three cut patterns provided at positions facing each of the three hole parts, of which two cut patterns are provided to face the ischium of the seated person s position. Thereby, the change of the shape of the cut pattern can be increased, and the position of the intersection of the line of the cut pattern through the cut of the cut groove can be more accurately and precisely matched according to the individual difference of the position of the ischium of the seated person, so that seating The improvement of the body pressure dispersion performance of the person and the suppression effect of the seated person's previous slip are more improved.

The length of the linear penetration cut groove should also be more than 20mm. With this, when the vertical load acts on the cut-in pattern, the protrusions and the peripheral portion of the protrusion area elastically deform toward the hole portion, and with this deformation, the adjacent protrusions (the width of the cut-out portion) expand and the protrusions The proportion of the air gap is increased, thereby dispersing the body pressure of the occupant well, and the peripheral portion of the ischium is stably supported, and it is easy to improve the stability of the seat. Furthermore, when the load (stress) caused by the fore slip is applied to the opening edge of the hole and/or the inner wall of the hole, the bent tab and the inner wall of the hole are curved The peripheral part of the tab area softly abuts and supports the front edge of the ischium of the seated person, so the movement of the ischium to the front is gently suppressed, the contact pressure with the positioning point rises rapidly, and the blood flow is partially prevented. It will happen, it is easy to effectively inhibit the front slip effect.

The cutting pattern is also preferably provided with a plurality of concentric circular non-penetrating cut grooves centered on the intersection of the linear cut grooves as the center and not penetrating the second resin layer. Thereby, when the vertical load acts on the cut-in pattern, the protruding piece is easily elastically deformed toward the hole portion and covers at least a part of the opening edge portion of the hole portion of the first resin layer and/or the inner wall of the hole portion, and therefore The reliability of the front slip suppression effect is improved, and the body pressure dispersion of the cut pattern can be further improved.

The cut pattern is provided with a plurality of concentric polygonal non-penetrating cut grooves centered on the intersection of the linear cut grooves and not penetrating the second resin. Thereby, when the vertical load acts on the cut-in pattern, it is easy to elastically deform toward the hole portion to cover at least a part of the opening edge portion of the hole portion of the first resin layer and/or the inner wall of the hole portion. The reliability of the slip suppression effect is improved, and the body pressure dispersion of the cut pattern can be further improved.

It is also preferable to have a through hole penetrating through the thickness direction of the second resin layer in the area where the adjacent linear cut-through pattern penetrates between the cutting grooves, or an opening that is opposite to the first resin layer and does not penetrate the second resin Non-through hole of the layer. Thereby, the apparent hardness of the valve becomes smaller, and it is easy to elastically deform toward the hole portion to cover the opening edge portion of the hole portion of the first resin layer and/or at least a part of the inner wall of the hole portion, which can increase the size of the body pressure dispersion Changes, it can improve the front slip suppression effect in the state of low body pressure at the positioning point, and can expand the range of requirements for the body pressure dispersion performance of the cushion material.

According to the present invention, there is further provided a cushion material having a structure in which a second resin layer is laminated on the first resin layer. The first resin layer includes at least one hole portion with or without a bottom, and the second resin layer includes at least one non-penetrating cut pattern in an area facing at least the hole portion, and the at least one non-penetrating cut pattern is The side facing the first resin layer has an opening, and is formed of at least three linear non-penetrating cut-out grooves that intersect each other at a predetermined intersection without penetrating the second resin layer. The inter-groove area between the adjacent linear non-penetrating cut grooves of the non-penetrating cut pattern and the peripheral portion of the inter-groove area continuous with the inter-groove area are configured to be elastically deformable. The inter-groove area and/or the peripheral area of the inter-groove area are configured such that when a vertical load acts on the non-penetrating cut pattern, it elastically deforms toward the hole portion to cover at least the opening edge of the hole portion and/or the inner wall of the hole portion Part.

In the cushioning material of the present invention, the first resin layer has a hole portion, and the second resin layer deposited thereon has a non-penetrating cut pattern composed of at least three cut grooves that do not penetrate in the thickness direction and intersect each other . When the vertical load acts on the non-penetrating cut pattern, the adjacent inter-groove area and the peripheral area of the non-penetrating cut pattern are elastically deformed toward the hole portion to cover the opening edge portion of the hole portion of the first resin layer and/or At least a part of the inner wall of the hole. Thereby, since the inter-groove area and the peripheral portion of the inter-groove area are curved downward to cover the opening edge and the periphery of the opening edge of the hole portion, the peripheral portion of the ischium is affected by the inter-groove area and the peripheral portion of the inter-groove area curved downward Support, and furthermore, with the bending deformation of the inter-groove area, the width of the adjacent inter-groove area expands and the proportion of voids increases, thereby dispersing the body pressure of the seated person well, and the peripheral part of the ischium is stably supported, improving the seat stability. In addition, when the horizontal load of the front slide acts, the above-mentioned body pressure dispersion or seat stability is maintained, and at least a part (locating point) of the inner wall of the opening edge portion and/or hole portion of the front is bent. The inter-groove area and the peripheral part of the inter-groove area softly abut and support the front edge of the ischium of the seated person, so the movement of the ischium to the front is gently suppressed, the contact pressure with the anchor point rises rapidly, and the blood flow is The situation of partial prevention does not occur, effectively inhibiting forward slip. In this way, according to the cushion material of the present invention, the predetermined body pressure dispersion performance can be maintained, and the seat stability and the effect of suppressing front slip can be improved together.

The hole portion of the first resin layer is preferably constituted by a bottomless hole penetrating the first resin layer. With this, the stability of the seat can be further improved.

A third resin layer is further provided. The third resin layer is laminated on the surface of the second resin layer opposite to the first resin layer, and the third resin layer is on the opposite side of the surface facing the second resin layer The surface has a plurality of block members. The plurality of block members have openings and are divided by non-penetrating grooves. The non-penetrating grooves should preferably form a portion with a larger load acting in the vertical direction of the third resin layer. With this, the body pressure dispersibility can be further improved.

It is also preferable to further include a base layer made of resin that is laminated on the surface of the first resin layer opposite to the second resin layer. In this way, the mechanical strength of the cushion material is improved, and the risk of bottoming in the thickness direction can be reduced.

In this case, at least one of the first resin layer, the second resin layer, and the base layer is also preferably provided with a resin foam harder than the resin constituting each layer at the front and rear end portions of the cushion material The hard part of the composition. Thereby, the mechanical strength of both end portions of the cushion material is further improved, and the stability of the user's seat posture in the left-right direction is improved, thereby maintaining a more stable seat posture.

Preferably, the adhesive layer is at least interposed between the first resin layer and the second resin layer. Thereby, since the first resin layer and the second resin layer are fixed, the deviation between the two layers can be reliably suppressed. The adhesive layer may be interposed between the second resin layer and the third resin layer, and/or between the base layer and the first resin layer.

At least one of the first resin layer, the second resin layer, and the base layer is also preferably composed of a resin foam or a three-dimensional mesh structure. With this, the change in the demand for the body pressure dispersion performance of the cushion material can be expanded. The third resin layer may be composed of a resin foam or a three-dimensional mesh structure.

The cushion material is preferably a cushion material for a seat surface of a wheelchair, a cushion material of a mattress, or a cushion material of a seat surface of a vehicle seat. If the cushion material is applied to a mattress, the predetermined body pressure dispersion when lying on the mattress or when sitting can be maintained to improve the stability of the seat and the suppression of front slip, thereby suppressing lying on the mattress The predetermined horizontal posture or poor posture at the time of sitting or sitting, in particular, can suppress the forward slip of the mattress with the back lifting function when lifting the back. Invention effect

According to the present invention, since the protrusion and the peripheral portion of the protrusion area are bent downward to cover at least a part of the opening edge of the hole portion and/or the inner wall of the hole portion, the peripheral portion of the ischium is The peripheral area of the tab area is supported, and as the tab section bends and deforms, the distance between adjacent tabs (the width of the cut-in portion) expands and the ratio of the gaps between the tabs increases, thereby dispersing the seating area well Body pressure, and the peripheral part of the ischium is stably supported, improving the stability of the seat. Moreover, when the horizontal load of the front slide is applied, the above-mentioned body pressure dispersion or seat stability is maintained, and it is used to cover at least a part (locating point) of the inner wall of the opening edge and/or hole portion in front The bent tab and the peripheral area of the tab area softly abut and support the front edge of the ischium of the seated person, so the movement of the ischium to the front is gently suppressed, and the contact pressure with the anchor point rises rapidly and blood The situation that the flow is partially blocked does not occur, effectively suppressing forward slip. In this way, according to the cushion material of the present invention, the predetermined body pressure dispersion performance can be maintained, and the seat stability and the effect of suppressing front slip can be improved together.

Furthermore, according to the present invention, since the inter-groove region and the peripheral part of the inter-groove region are curved downward to cover the opening edge and the periphery of the opening part of the hole, the peripheral part of the ischium is affected by the inter-groove region and the inter-groove region curving downward Supported by the peripheral part, and with the bending deformation of the inter-groove area, the width of the adjacent inter-groove area expands and the proportion of voids increases, thereby dispersing the body pressure of the seated person well, and the peripheral part of the ischium is stably supported, Improve seat stability. In addition, when the horizontal load of the front slide acts, the above-mentioned body pressure dispersion or seat stability is maintained, and at least a part (locating point) of the inner wall of the opening edge portion and/or hole portion of the front is bent. The inter-groove area and the peripheral part of the inter-groove area softly abut and support the front edge of the ischium of the seated person, so the movement of the ischium to the front is gently suppressed, the contact pressure with the anchor point rises rapidly, and the blood flow is partially The blocking situation does not occur, effectively inhibiting forward slip. In this way, according to the cushion material of the present invention, the predetermined body pressure dispersion performance can be maintained, and the seat stability and the effect of suppressing front slip can be improved together.

Detailed description of the preferred embodiment Hereinafter, the cushion material of the present invention will be described using drawings. 1 is a schematic diagram showing the structure of a cushion material according to an embodiment of the present invention, and FIGS. 2 and 3 are schematic diagrams showing the structure of a first resin layer and a second resin layer, which are the basic structures of the cushion material according to this embodiment. FIG. 4 shows a cross-section taken along line AA in FIG. 5, and FIG. 5 is a schematic diagram showing the structure of the second resin layer of the cushion material of the present embodiment when it is not deformed and when it is deformed.

As shown in these figures, the cushioning material 10 of the present embodiment has the following structure: the base layer 11 composed of a resin foam such as polyurethane resin or the like is passed through the adhesion layer 1 as needed The resin layer (ischium storage layer) 12 must have a second resin layer (ischia support layer) 13 laminated on the first resin layer 12 through the adhesive layer, and the second resin layer 13 may be laminated through the adhesive layer as necessary. 3 Resin layer (body pressure dispersion imparting layer) 14.

The base layer 11 is formed by molding a resin foam such as polyurethane resin into a flat plate shape, and is provided to improve the mechanical strength of the cushion material and prevent the seated person from bottoming out. In addition to the polyurethane resin foam, the base layer 11 may also use a polyethylene resin foam, a polyolefin resin foam, or a silicone resin foam. Furthermore, instead of the resin foam, the three-dimensional mesh structure, resin-made rigid cotton or soft resin may be used to constitute the base layer 11.

The first resin layer 12 includes at least one (one in this embodiment) bottomed (non-penetrating) or bottomless (penetrating) hole portion 12a, which is formed by, for example, polyurethane resin, etc. The foamed body of the resin is formed into a flat plate, and the hole 12a is cut out, and is provided to form a positioning point for stably supporting the ischial portion of the seated person and suppressing forward sliding. When the hole portion 12a is a bottomless hole, it is formed by perforating a plate-shaped resin foam, and when it is a bottomed hole, the first resin layer 12 is formed by foaming in a mold, or A method of fixing a flat resin foam volume layer provided with penetrating bottomless holes to a flat resin foam is formed. In the present embodiment, the planar shape of the hole portion 12a is a two-circle (perfect circle or ellipse) shape partially overlapping as shown in the figure. However, this planar shape is not limited to this shape as long as it is a sit bone portion that can support a seated person, and various shapes can be applied as described later. In addition, the shape of the inner wall 12c of the hole portion 12a may be formed such that the shape of the hole portion of the first resin layer 12 in a plane view is fixed in the thickness direction, or may be formed so that the shape of the hole is similar in the thickness direction Or non-similar shape changes. In addition to the polyurethane resin foam, the first resin layer 12 may use a polyethylene resin foam, a polyolefin resin foam, a polysiloxane resin foam, or the like. Furthermore, instead of the resin foam, a three-dimensional mesh structure, resin-made rigid cotton, or soft resin may be used to constitute the first resin layer 12.

The second resin layer 13 is provided with at least one (two in this embodiment) cut-out pattern 13a in an area facing the hole portion 12a of the first resin layer 12, and is formed by punching, for example, in polyurethane A resin foam such as a resin is formed into a flat plate, and the cut pattern 13a is cut out, and is provided to support the ischial part of the seated person and disperse the pressure at the positioning point. In addition to the polyurethane resin foam, the second resin layer 13 may use a polyethylene resin foam, a polyolefin resin foam, a polysiloxane resin foam, or the like. Moreover, instead of the resin foam, a three-dimensional mesh structure may be used to constitute the second resin layer 13.

Each cut pattern 13a is composed of at least three (eight in this embodiment) linear through cut grooves 13b penetrating through the thickness direction of the second resin layer 13 and crossing each other at a predetermined intersection. In other words, the linear through-cut groove 13b of the cut-out pattern 13a extends radially from its intersection as a starting point, and ends in a region in the hole 12a of the first resin layer. The linear through-cut grooves 13b are constituted by through-slots in this embodiment. In this way, by forming through-slots, when the load acts, the protruding piece and the peripheral portion of the protruding piece area are easily bent downward, and the opening edge portion 12b of the hole portion 12a and/or the inner wall 12c of the hole portion 12a are covered Therefore, the effect of the present invention can be efficiently exhibited. In addition, the linear through-cut groove 13b can be efficiently and stably produced. In addition, the linear through-cut groove 13b may be a form in which a cantilever-shaped protrusion can be formed by the linear through-cut groove 13b adjacent to each other, and the line shape or line width, etc. are not limited, and include a linear shape and a wave shape. The shape is curved or arc-shaped, or the shape of the line width is constant or changes in the length direction.

In this embodiment, the two cut patterns 13a have a line-symmetric shape with a center line (not shown). In addition, it has been described that each of the cutting patterns 13a has eight linear through cutting grooves 13b, but the present invention is not limited to this number, as long as the effects of the present invention can be exerted, it can be configured to have 3 to 7 cutting patterns as described later. Or more than nine linearly intersecting cut-through grooves. Furthermore, it may be configured such that, by making one of the two cut patterns rotate in the shape of the center, the shape is non-linearly symmetric with the center line not shown.

The two cut patterns 13a of the present embodiment are arranged at mutually different positions in a region facing the hole portion 12a of the first resin layer 12. Thereby, since the conformability to the shape of the user's buttocks is improved, the body pressure dispersibility of the cushion material and the stability of the seat can be more improved. In this case, the distance between the intersections of the linear cut-through grooves 13b in the two cut-out patterns 13a is preferably 110 to 140 mm. As a result, the position of the ischium of the human body according to the statistical database or the like can be reliably reflected at the position where the second resin layer 13 linearly penetrates the intersection of the cut groove 13a, so that the front slip of the seated person can be more surely increased Inhibitory effect.

As clearly shown in FIG. 5(A), the second resin layer 13 is constituted by a cantilever-shaped protrusion 13c and a peripheral portion 13d of the protrusion area elastically deformable, and the protrusion 13c is formed by linearly adjoining cut patterns 13a adjacent to each other The area between the cut grooves 13b is formed, and the peripheral portion 13d of the tab area is continuous with the root of the tab 13c (hereinafter, the cantilevered tab 13c is abbreviated as the valve 13c and the peripheral area 13d of the tab area is abbreviated as the valve Peripheral part 13d). In this embodiment, the eight valves 13c and the valve peripheral portion 13d are formed by the eight linear cut-through grooves 13b. Thereby, it is configured that when the vertical load of the valve 13c and the valve peripheral portion 13d acts on the cut pattern 13a (the state where the user is seated from the vertical direction, the same applies hereinafter), it elastically deforms toward the hole portion 12a to cover the first The opening edge portion 12b of the hole portion 12a and/or the inner wall 12c of the hole portion 12a of the resin layer 12, and the load (stress) due to the current sliding acts on the opening edge portion 12b and/or the inner wall 12c of the hole portion 12a , The valve 13c and/or the valve peripheral portion 13d is pushed and deformed in the direction of the opening edge 12b and/or the inner wall 12c of the hole 12a, especially covering at least a part of the front opening edge 12b and/or the inner wall 12c The positioning point 12d constitutes and supports the load.

The length of the linear through-cut groove 13b is preferably set to 20 mm or more. With this setting, when the vertical load acts on the cut pattern 13a, the valve 13c and the valve peripheral portion 13d elastically deform toward the hole portion 12a. As shown in FIG. 5(B), with this deformation, the space between adjacent valves (the width of the cut-in portion) expands and the proportion of the gap between the valves increases, whereby the body pressure of the seated person is well dispersed, and the ischial The peripheral part is stably supported, and it becomes easy to improve the stability of the seat. Furthermore, when the load (stress) caused by the forefoot is acting in the direction of the opening edge 12b and/or the inner wall 12c of the hole 12a, at least a part of the inner wall covering the front opening edge and/or the hole 12a (positioning Point) The bent valve and the peripheral part of the valve softly abut the front edge of the ischium of the seated person and support it, so the movement of the ischium to the front is gently suppressed, and the contact pressure with the positioning point will increase rapidly However, the condition of locally preventing blood flow does not occur, and the effect of effectively suppressing forward slip can be easily obtained.

The third resin layer 14 is formed by forming a plurality of block members 14b on the upper surface of a resin foam such as polyurethane resin. The block members 14b are opposite to the second resin layer 13 The surface on the opposite side is divided by a plurality of non-penetrating grooves 14a having openings, and is provided to disperse the body pressure of the seated person well. Such a structure of the third resin layer 14 is known from Patent Documents 1 and 2, for example. In addition to the polyurethane resin foam, the third resin layer 14 may use a polyethylene resin foam, a polyolefin resin foam, a polysiloxane resin foam, or the like. Furthermore, instead of the resin foam, a three-dimensional mesh structure, resin-made rigid cotton, or soft resin may be used to constitute the third resin layer 14.

The base layer 11 and the first resin layer 12 are not necessarily fixed to each other. In the case of fixing, a fixing adhesive layer is provided only on the front surface or a part between the two by applying an adhesive agent or attaching an adhesive film. The first resin layer 12 and the second resin layer 13 are fixed to each other. Only the whole or a part between the two is provided with the fixing adhesive layer by the coating of the adhesive agent or the adhesion of the adhesive film. The second resin layer 13 and the third resin layer 14 are not necessarily fixed to each other. In the case of fixing, a fixing adhesive layer is provided only on the front surface or a part between the two by applying an adhesive agent or attaching an adhesive film. By fixing the base layer 11 and the first resin layer 12 with the adhesive layer, the first resin layer 12 and the second resin layer 13, the second resin layer 13 and the third resin layer 14, it is possible to reliably suppress the difference between the layers Offset.

In the present embodiment, the linear cut groove of the cut pattern 13a is a through groove. However, as will be described later, the linear cut groove may be a non-through groove (see FIG. 17). If the linear cut groove is a through groove, the cut pattern 13a is formed by perforating a flat resin foam, and if the linear cut groove is a non-through groove, the cut pattern is a half cut cut into a non-penetrating state by a cutter It is processed or formed by fixing a flat resin foam volume layer provided with a through groove on the flat resin foam.

Furthermore, in the present embodiment, the cushion material 10 has a four-layer structure in which the base layer 11, the first resin layer 12, the second resin layer 13, and the third resin layer 14 are stacked on each other. However, the cushion of the present invention The mat material only needs to have a basic structure in which the first resin layer (ischial portion storage layer) 12 and the second resin layer (ischial support layer) 13 are laminated with each other through the adhesive layer. In addition, the base layer 11, the first resin layer 12, the second resin layer 13, and the third resin layer 14 are formed in a flat plate shape with a fixed thickness, but the thickness may be partially formed within a range that does not hinder the effect of the present invention. Different forms. Furthermore, in this embodiment, the base layer 11, the first resin layer 12, the second resin layer 13 and the third resin layer 14 are each constituted by one member, but as long as the effects of the present invention are not impaired, it may be divided into A plurality of persons are combined to form a person.

FIG. 6 shows a modified example of the combination of the hole portion and the cut pattern of the cushion material of the present embodiment, and FIG. 7 shows a modified example of the cut pattern of the cushion material of the present embodiment.

As shown in FIG. 6(A), it is also possible to provide a center not shown in a mutually different position in a region facing a hole portion 22a (a slightly rectangular shape in this example) of the first resin layer The lines are two cut patterns 23a in a line-symmetric shape. In this case, two cut-out patterns 23a are provided at positions where the two regions where the hole portion 22a is divided into two are opposed to the ischium of the seated person. In addition, although not shown in the figure, three cut patterns may be provided at positions facing three areas divided into three by one hole portion (however, two cut patterns are provided between The position of the ischium). With this, since the number of cut patterns provided in the second resin layer is increased, the position of the intersection of the cut patterns and the position of the ischium of the seated person can be more accurately matched, so it can accurately correspond to each person The size of the seat improves the body pressure dispersion performance of the seated person and the effect of suppressing the previous slip of the seated person. Furthermore, as shown in FIG. 6(B), the center lines (not shown) may also be provided in areas facing the two hole portions 32a (in this example, slightly rectangular shapes) of the first resin layer, respectively. Two cut patterns 33a in a line-symmetrical shape. In this case, two cut-out patterns 33a are provided at mutually different positions (positions opposed to the ischium of the seated person) in areas facing the two hole portions 32a. Furthermore, as shown in FIG. 6(C), one cut-out pattern 43a may be provided in a region with one hole 42a (in this example, a slightly rectangular shape) of the first resin layer. In this case, one cut pattern 43a provided at a position opposed to the center of the hole 42a is provided. Furthermore, as shown in FIG. 6(D), one cut pattern 53a may be provided so as to partially exceed the area facing the one hole portion 52a of the first resin layer (a belt shape in this example). Furthermore, as shown in FIG. 6(E), three cut patterns 63a may be provided in regions facing the three hole portions 62a of the first resin layer (in this example, a slightly rectangular shape), respectively. In this case, three cut patterns 63a are provided at mutually different positions in the area facing the three hole portions 62a. However, two of the cut-in patterns are in a line-symmetrical shape with the center line (not shown) placed at a position opposite to the ischium of the seated person. In this way, the change of the shape of the cut pattern can be increased, and the position of the line of the cut pattern through the intersection of the cut groove can be more accurately and precisely matched according to the personal difference in the position of the ischium and coccyx of the seated person. The body pressure dispersion performance of the seated person is improved and the effect of suppressing the previous slip of the seated person is further improved.

In addition, as shown in FIG. 7(A), the cut pattern may be provided with a through hole penetrating through the thickness direction of the second resin layer at the intersection portion 73e where the eight linear through cut grooves 73b formed by the through slots are intensively crossed. constitute. Further, as shown in FIG. 7(B), the eight linear penetration cut grooves 83b formed by the wide penetration slits may intersect the intersection portion 83e in which the second resin layer is formed in the thickness direction. And constitute. By providing the through-hole, since the ratio of the gap cut into the pattern area is increased, the body pressure dispersion performance during seating can be further improved.

FIG. 8 shows a modification example of the cutting pattern of the cushion material of this embodiment. Any of the cut patterns shown in the same figure is the case where the number of valves is three.

As shown in FIG. 8(A), the cutting pattern may be two cutting patterns 93a that are linearly symmetrical to each other, and three linear through cutting grooves formed by through slits intersect at the intersection. Moreover, as shown in FIG. 8(B), there may be two cut patterns 103a that are linearly symmetrical to each other, and three linear cut-through grooves formed by the through slots are intersected at the intersection and concentrated at the intersection. The intersection portion is provided with a through hole penetrating in the thickness direction of the second resin layer. Furthermore, as shown in FIGS. 8(C) and (D), respectively, there may be two cut patterns 113a and 123a that are linearly symmetrical to each other, and the three linear cut-through grooves formed by the through slots are located at The intersecting portion widens the intersecting width, and the intersecting portion is provided with a through hole penetrating in the thickness direction of the second resin layer. Furthermore, as shown in FIG. 8(E), the following two cut patterns 133a may also be formed: the lines are symmetrical to each other, and the three linear cut grooves formed by the wide through slots are concentrated at the intersection. cross. Furthermore, as shown in FIG. 8(F), the following two cut patterns 143a may be formed: the lines are symmetrical to each other, and the three linear through cut grooves formed by the through slots are widened at the intersection to broaden the cross Furthermore, a through hole penetrating through the thickness direction of the second resin layer is provided at the intersection, and a through hole penetrating through the thickness direction of the second resin layer or the 1 The resin layer has a non-through hole that is open to the opposite side and does not penetrate the second resin layer. By providing such a cut-in pattern 143a, the apparent hardness of the valve becomes small, and it becomes easy to elastically deform toward the hole to cover at least a part of the opening edge of the hole of the first resin layer and/or the inner wall of the hole, In addition, it can increase the variation of the body pressure dispersion, so that the body pressure can be lowered at the positioning point, the front slip suppression effect can be further improved, and the range of requirements for the body pressure dispersion performance of the cushion material can be expanded.

In addition, as shown in FIG. 8(G), the cutting pattern may also be two cutting patterns 153a that are linearly symmetrical to each other, and three linear through cutting grooves 153b composed of through slits intersect at the intersection In addition, a plurality of non-penetrating cut-out grooves 153f having a plurality of concentric polygonal shapes (concentric triangle shapes in this embodiment) that do not penetrate the second resin layer around the intersection of the linear cut-through grooves 153b as the center are provided. Furthermore, as shown in FIG. 8(H), there may be two cut patterns 163a that are linearly symmetrical to each other, and three linear cut-through grooves 163b formed by a through slot are formed broadly at the intersection Expand and cross, and provide a through hole penetrating in the thickness direction of the second resin layer at the intersection, and further include a plurality of concentric polygonal shapes that do not penetrate the second resin layer centering on the intersection of the linear through groove 163b (The concentric triangular shape in this embodiment) the non-penetrating cut groove 163f. Furthermore, as shown in FIG. 8(I), the following two cut patterns 173a may be formed: the lines are symmetrical to each other, and the three linear through cut grooves 173b formed by the through slots are wide at the intersection. It is expanded to cross, and a through hole penetrating through the thickness direction of the second resin layer is provided at the intersection, and furthermore, there are a plurality of concentric holes that do not penetrate the second resin layer centering on the intersection of the linear through groove 173b The round non-penetrating cut groove 173f. By providing the cut-in patterns 153a, 163a, or 173a as described above, when the vertical load acts on the cut-in patterns, the valve becomes easily bent and deformed, and the apparent hardness also becomes low, so it is easy to cover the opening edge of the hole portion 12a At least a part of the portion 12b and/or the inner wall 12c, and then the load (stress) due to front slipping acts on the opening edge portion 12b and/or the inner wall 12c of the hole portion 12a, it can be supported with a low body pressure, so The reliability of the front slip suppression effect can be improved, and since the apparent hardness of the cut pattern can be made small, the body pressure dispersion of the positioning point can be more improved.

Furthermore, as shown in FIG. 8(J), the cut pattern may include: three linear through cut grooves 183b formed by wide through slots, and two cuts in a line symmetrical shape that intersect each other at the intersection Pattern 183a; and a plurality of straight lines penetrating the cut-out groove or not penetrating through the second resin layer parallel to the straight line connecting the intersections of the two cut-in patterns 183a and formed at a predetermined distance from the intersection 183 g of linear non-penetrating cut grooves of the 2 resin layer. By providing such a cutting pattern 183a and a linear through-cutting groove or a linear non-through-cutting groove 183g, the valve and the peripheral portion of the valve are easily bent and deformed and the apparent hardness is also reduced, so it is easy to cover the opening edge of the hole portion 12a At least a part of the portion 12b and/or the inner wall 12c can be supported with a low body pressure even when the load acts on the opening edge portion 12b and/or the inner wall 12c of the hole portion 12a, so that the front slip suppression can be further improved at the same time Effect and body pressure dispersion. Furthermore, the position of the intersection of the linear penetrating cut groove or the linear non-penetrating cut groove 183b and the position of the ischium of the seated person can be more appropriately and precisely aligned according to the ischial position data of each human body Making customized cushioning materials corresponding to each person's body shape can improve the body pressure dispersion performance of the seated person and the effect of suppressing the previous slip of the seated person according to the body shape of each person. Furthermore, if a plurality of straight cut-through grooves 183g penetrating the second resin layer are provided, it is preferable to have a structure in which a part of the valve like the cut-in pattern 183a does not fall off. In addition, the linear non-penetrating cut grooves 153f, 163f, 173f, and 183g formed in FIGS. 8(G) to 8(J) may be formed on the surface side of the second resin layer, or may be formed opposite to the hole portion 12a. The side. In addition, instead of these linear non-penetrating cut grooves 153f, 163f, 173f, and 183g, curved non-penetrating cut grooves such as a wave shape or an arc shape may be used.

FIG. 9 shows a modified example of the cut pattern of the cushion material of this embodiment. Any of the cut-in patterns shown in the figure is the case where the number of valves is 4.

The cut-in patterns are shown in Fig. 9(A) and (B), and they can also be the following two cut-in patterns 193a and 203a: linearly symmetrical to each other, and 4 linear through cuts formed by wide through slots The ditch crosses at the intersection. Moreover, as shown in FIGS. 9(C) and (D), it may also be a configuration having the following configuration: four linear through-cut grooves 213b formed by line-symmetrical shapes and wide through-slots with each other and 223b Two cut patterns 213a and 223a that intersect intensively at the intersection; and parallel to the straight line connecting the intersections of these two cut patterns 213a and 223a and formed at a predetermined distance from the intersection and penetrate the second resin A plurality of straight-line non-penetrating cut-out grooves 213g and 223g penetrating into the groove or not penetrating the second resin layer. By providing such cutting patterns 213a and 223a and linear through-cutting grooves or linear non-through-cutting grooves 213g and 223g, the valve and the peripheral portion of the valve are easily bent and deformed, and the apparent hardness also becomes low, so it is easy to cover the hole At least a part of the opening edge portion 12b and/or the inner wall 12c of the portion 12a can be supported by a state of low body pressure even when a load acts on the opening edge portion 12b and/or the inner wall 12c of the hole portion 12a The front slip suppression effect and body pressure dispersion are further improved. Furthermore, the position of the intersection of the linear penetrating cut groove or the linear non-penetrating cut groove 213g and 223g and the position of the ischium of the seated person can be more appropriately and precisely opposed according to the data of the position of the ischium of each human body. Therefore, a customized cushion material corresponding to each person's body shape can be produced, and the body pressure dispersion performance of the seated person can be improved according to the body shape of each person, and the effect of suppressing the previous slip of the seated person can be further improved. Furthermore, if a plurality of straight cut-through grooves 213g and 223g penetrating through the second resin layer are provided, it is preferable to have a structure in which the valve such as a part of the cut-out patterns 213a and 223a does not come off. In addition, the linear non-penetrating cut grooves 213g and 223g formed in FIGS. 9(C) and 9(D) may be formed on the surface side of the second resin layer, or may be formed on the side opposite to the hole portion 12a. In addition, instead of these straight-line non-penetrating cut-out grooves 213g and 223g, curved or non-penetrating cut-out grooves such as a wave shape or an arc shape may be used.

FIG. 10 shows a modification example of the cutting pattern of the cushion material of this embodiment. Any of the cut patterns shown in the same figure is the case where the number of valves is 6.

As shown in FIG. 10(A), the cutting pattern may also be two cutting patterns 233a that are linearly symmetrical to each other, and the six linear through cutting grooves formed by the through slots intersect at the intersection. Also, as shown in FIG. 10(B), there may be two cut patterns 243a that are linearly symmetrical to each other, and the six linear cut-through grooves formed by the through slits intersect at the intersection and concentrate on The intersection portion is provided with a through hole penetrating in the thickness direction of the second resin layer. Furthermore, as shown in FIG. 10(C), the following two cut patterns 253a may also be formed: the lines are symmetrical to each other, and the six linear cut-through grooves formed by the through-slots widen widely at the intersection. The intersection is provided with a through hole penetrating in the thickness direction of the second resin layer at the intersection. Furthermore, as shown in FIG. 10(D), there may be two cut patterns 263a: each is non-linearly symmetrical with each other, and the six linear through cut grooves formed by the through slots are widened at the intersection to cross , And a through hole penetrating through the thickness direction of the second resin layer is provided at the intersection. That is, it may be configured such that, by making one of the two cut-in patterns rotate around its center, it becomes a non-linearly symmetrical shape with respect to the center line (not shown). Furthermore, as shown in FIG. 10(E), the following two cut patterns 273a may be formed: six linear through cut grooves formed in a line symmetrical shape and a wide through slot are concentrated at the intersection cross. Furthermore, as shown in FIG. 10(F), the following two cut patterns 283a may be formed: the lines are symmetrical to each other, and the six linear through cut grooves formed by the through slots are widened and widened at the intersection. Cross, and a through hole penetrating in the thickness direction of the second resin layer is provided at the intersection, and a through hole penetrating the thickness direction of the second resin layer or the first 1 The resin layer has a non-through hole that is open to the opposite side and does not penetrate the second resin layer. By providing such a cut-in pattern 283a, the apparent hardness of the valve becomes small, and it becomes easy to elastically deform toward the hole to cover at least a part of the opening edge of the hole of the first resin layer and/or the inner wall of the hole, In addition, it can increase the change of the body pressure dispersion, and can improve the effect of suppressing the front slip when the body pressure of the positioning point is low. In addition, it can expand the range of requirements for the body pressure dispersion performance of the cushion material.

In addition, as shown in FIG. 10(G), the cutting pattern may be two cutting patterns 293a that are linearly symmetrical to each other as follows: the six linear through cutting grooves 293b formed by the through slots intersect intensively at the intersection, Furthermore, a plurality of non-penetrating cut-out grooves 293f having a plurality of concentric polygonal shapes (concentric hexagonal shapes in the present embodiment) that do not penetrate the second resin layer around the intersection of the linear cut-through grooves 293b as the center are provided. Furthermore, as shown in FIG. 10(H), two cut patterns 303a in a line-symmetric shape with each other may be as follows: the six linear cut-through grooves 303b formed by the through slits are broadly expanded at the intersection Intersecting, and the intersecting portion is provided with a through-hole penetrating through the thickness direction of the second resin layer, and further comprising a plurality of concentric polygonal shapes that do not penetrate the second resin layer centering on the intersecting portion of the linear through-cut groove 303b ( In the present embodiment, it is a non-penetrating cut-out groove 303f. Furthermore, as shown in FIG. 10(I), two cut patterns 313a that are line-symmetrical to each other may be as follows: the six linear cut-through grooves 313b formed by the through-slots widen widely at the intersection It crosses, and a through hole penetrating through the thickness direction of the second resin layer is provided at the intersection, and further includes a plurality of concentric circles that do not penetrate the second resin layer centering on the intersection of the linear through groove 313b The non-penetrating shape cuts into the groove 313f. By providing the cut patterns 293a, 303a, or 313a as described above, when the vertical load acts on the cut patterns, the valve becomes easily bent and deformed, and the apparent hardness also becomes low, so it is easy to cover the opening edge of the hole 12a 12b and/or at least a part of the inner wall 12c, and then the load (stress) due to front slipping acts on the opening edge portion 12b and/or the inner wall 12c of the hole portion 12a, it can be supported in a state of low body pressure, so it can The reliability of the front slip suppression effect is improved, and the apparent hardness of the cut pattern can be reduced, so that the body pressure dispersion of the positioning point can be more improved.

Furthermore, as shown in FIG. 10(J), the cut pattern may also have a configuration in which six linear penetration cut grooves 323b formed by wide penetration slots are intensively crossed at the intersection and form a line-symmetric shape with each other Two cut patterns 323a; and a plurality of straight lines penetrating the cut groove or parallel to the straight line connecting the intersections connecting the two cut patterns 323a and formed at a predetermined distance from the intersection and penetrating the second resin layer or 323g of straight non-penetrating cut grooves that do not penetrate the second resin layer. By providing such a cutting pattern 323a and a linear through-cutting groove or a linear non-through-cutting groove 323g, the valve and the peripheral portion of the valve are easily bent and deformed, and the apparent hardness is also reduced, so it is easy to cover the opening of the hole portion 12a At least a part of the edge portion 12b and/or the inner wall 12c, even if the load due to the forward sliding acts on the opening edge portion 12b and/or the inner wall 12c of the hole portion 12a, it can be supported in a state of low body pressure, so it can be The front slip suppression effect and body pressure dispersibility are further improved at the same time. Furthermore, the position of the intersection of the linear penetrating cut groove or the linear non-penetrating cut groove 323b and the position of the ischium of the seated person can be more accurately and precisely aligned with each other's ischial position data of each human body. Customized cushioning materials can be produced corresponding to each person's body shape, which can be adapted to each person's body shape, so as to improve the body pressure dispersion performance of the seated person and the effect of suppressing the previous slip of the seated person. Furthermore, if a plurality of straight cut-through grooves 323g penetrating the second resin layer are provided, it is preferable to have a structure such that a part of the valve of the cut-out pattern 323a does not fall off. In addition, the linear non-penetrating cut grooves 293f, 303f, 313f, and 323g formed in FIGS. 10(G) to 10(J) may be formed on the surface side of the second resin layer, or may be formed to face the hole portion 12a. Face side. In addition, instead of these linear non-penetrating cut grooves 293f, 303f, 313f, and 323g, curved non-penetrating cut grooves such as a wave shape or an arc shape may be formed.

FIG. 11 shows a modified example of the cut pattern of the cushion material of this embodiment. Any of the cut-in patterns shown in the figure is the case where the number of valves is 8.

As shown in FIG. 11(A), the cutting patterns may be two cutting patterns 333a configured as follows: the lines are symmetrical to each other, and the eight linear through cutting grooves formed by the through slits intersect at the intersection. Also, as shown in FIG. 11(B), it may be two cut patterns 343a configured as follows: the lines are symmetrical to each other, and the eight linear penetration cut grooves formed by the through slots intersect intensively at the intersection, and A through hole penetrating through the thickness direction of the second resin layer is provided at the intersection. Further, as shown in FIG. 11(C), two cut patterns 353a may be formed as follows: the lines are symmetrical to each other, and the eight linear cut-through grooves formed by the through-slots are expanded widely at the intersection. Cross, and a through hole penetrating in the thickness direction of the second resin layer is provided at the intersection. Furthermore, as shown in FIG. 11(D), two cut patterns 353a may be formed as follows: the shapes are non-linearly symmetrical to each other, and the eight linear through cut grooves formed by the through slots are wide at the intersection It expands and crosses, and a through hole penetrating in the thickness direction of the second resin layer is provided at the intersection. That is, it may be configured such that by making one of the two cut-in patterns rotate around its center, it becomes a non-linearly symmetrical shape with respect to the center line (not shown). Further, as shown in FIG. 11(E), two cut patterns 373a may be formed as follows: the lines are symmetrical to each other, and the eight linear cut grooves formed by the wide through slots are at the intersection Focus on crossing. Furthermore, as shown in FIG. 11(F), two cut patterns 383a configured as follows: each having a line symmetrical shape, and eight linear penetration cut grooves formed by the through slits are broadly expanded at the intersection And intersect, and a through hole penetrating in the thickness direction of the second resin layer is provided at the intersecting portion, and a through hole penetrating in the thickness direction of the second resin layer is provided in the region where the adjacent linear penetration penetrates between the grooves A non-through hole that opens to the side facing the first resin layer and does not penetrate the second resin layer. By providing such a cut-in pattern 383a, the apparent hardness of the valve becomes small, and it becomes easy to elastically deform toward the hole to cover at least a part of the opening edge of the hole of the first resin layer and/or the inner wall of the hole, In addition, it can increase the change of the body pressure dispersion, so that the front slip suppression effect can be further improved when the body pressure of the positioning point is low, and the demand range of the body pressure dispersion performance of the cushion material can be expanded.

Further, as shown in FIG. 11(G), the cut patterns are provided with two cut patterns 393a which are formed in a line-symmetric shape with each other as follows: the eight linear through cut grooves 393b formed by the through slots are intensively crossed at the intersection, In addition, a plurality of concentric polygonal shapes (concentric octagonal shapes in the present embodiment) of a plurality of concentric polygons that are centered on the intersection of the linear penetrating groove 393b and do not penetrate the second resin layer are provided. Furthermore, as shown in FIG. 11(H), two cut patterns 403a formed in a line-symmetric shape with each other may be formed as follows: the eight linear cut-through grooves 403b formed by the through-slots are broadly expanded at the intersection It crosses, and a through hole penetrating through the thickness direction of the second resin layer is provided at the intersection, and further includes a plurality of concentric polygons that do not penetrate the second resin layer centering on the intersection of the linear through groove 403b The non-penetrating cut groove 403f of the shape (concentric octagonal shape in this embodiment). Furthermore, as shown in FIG. 11(I), two cut patterns 413a formed in a line-symmetric shape with each other may be formed as follows: the eight linear cut-through grooves 413b formed by the through-slots are broadly expanded at the intersection It crosses, and a through hole penetrating in the thickness direction of the second resin layer is provided at the intersection, and further includes a plurality of concentric circles centering on the intersection of the linear through groove 413b and not penetrating the second resin layer The non-penetrating shape cuts into the groove 413f. By providing the cut patterns 393a, 403a, or 413a as described above, when the vertical load acts on the cut patterns, the valve becomes easily bent and deformed, and the apparent hardness also becomes low, so it is easy to cover the opening edge of the hole 12a 12b and/or at least a part of the inner wall 12c, and then the load (stress) due to front slipping acts on the opening edge portion 12b and/or the inner wall 12c of the hole portion 12a, it can be supported with a low body pressure, so it can The reliability of the front slip suppression effect is improved, and the apparent hardness of the cut pattern can be reduced, so that the body pressure dispersion of the positioning point can be further improved.

Furthermore, as shown in FIG. 11(J), the cutting pattern may also be in the form of 8 linear penetrating cut-out grooves 423b composed of wide penetrating slits, which intersect each other in a line-symmetrical shape at the intersection. Two cut patterns 423a; and a plurality of straight lines penetrating the cut groove or parallel to the straight line connecting the intersections connecting the two cut patterns 423a and formed at a predetermined distance from the intersection and penetrating the second resin layer or The linear non-penetrating cut groove 423g does not penetrate the second resin layer. By providing such a cutting pattern 423a and a linear through-cutting groove or a linear non-through-cutting groove 423g, the valve and the peripheral portion of the valve are easily bent and deformed, and the apparent hardness is also reduced, so it is easy to cover the opening of the hole portion 12a At least a part of the edge portion 12b and/or the inner wall 12c can be supported in a state of low body pressure even when the load due to forward sliding acts on the opening edge portion 12b and/or the inner wall 12c of the hole portion 12a, Therefore, the front slip suppression effect and body pressure dispersion can be further improved at the same time. Furthermore, the position of the intersection of the linear penetrating cut groove or the linear non-penetrating cut groove 423b and the position of the ischium of the seated person can be more appropriately and precisely aligned according to the ischial position data of each human body By making cushioning materials corresponding to each person's body shape, the body pressure dispersion performance of the seated person can be improved according to the body shape of each person, and the effect of suppressing the previous slip of the seated person can be further improved. Furthermore, if a plurality of straight cut-through grooves 423g penetrating the second resin layer are provided, it is desirable to have a structure such that a part of the valve of the cut-out pattern 423a does not fall off. In addition, the linear non-penetrating cut grooves 393f, 403f, 413f, and 423g formed in FIGS. 11(G) to 11(J) may be formed on the surface side of the second resin layer, or may be formed opposite to the hole portion 12a. The side. In addition, instead of these linear non-penetrating cut grooves 393f, 403f, 413f, and 423g, curved non-penetrating cut grooves such as a wave shape or an arc shape may be formed.

FIG. 12 shows a modification example of the cut pattern of the cushion material of this embodiment. Either of the cut-in patterns shown in the figure is in the form of 12 valves.

As shown in FIG. 12(A), the cut patterns may be two cut patterns 433a configured as follows: the lines are symmetrical to each other, and the twelve linear through cut grooves formed by the through slots are intensively crossed at the intersection. Moreover, as shown in FIG. 12(B), there may be two cut patterns 443a configured as follows: the lines are symmetrical to each other, and the twelve linear through cut grooves formed by the through slots are intersected at the intersection and concentrated at The intersection portion is provided with a through hole penetrating in the thickness direction of the second resin layer. Furthermore, as shown in FIG. 12(C), there may be two cut patterns 453a configured as follows: the lines are symmetrical to each other, and the twelve linear through cut grooves formed by the through slots are widened widely at the intersection It crosses, and a through hole penetrating in the thickness direction of the second resin layer is provided at the intersection. Furthermore, as shown in FIG. 12(D), there may be two cut patterns 463a configured as follows: the lines are non-linearly symmetrical to each other, and the twelve linear penetration cut grooves formed by the penetration slots are wide at the intersection It expands and crosses, and a through hole penetrating in the thickness direction of the second resin layer is provided at the intersection. That is, it may be configured such that by making one of the two cut-in patterns rotate around its center, it can be formed into a shape that is not line-symmetrical with respect to the center line (not shown). Furthermore, as shown in FIG. 12(E), there may be two cut patterns 473a configured as follows: the lines are symmetrical to each other, and 12 linear cut slits formed by wide through slots are formed at the intersection Focus on crossing. Furthermore, as shown in FIG. 12(F), two cut patterns 483a may be formed as follows: the lines are symmetrical to each other, and the twelve linear through cut grooves formed by the through slots are widened widely at the intersection And intersect, and a through hole penetrating through the thickness direction of the second resin layer is provided at the intersecting portion, and a through hole penetrating through the thickness direction of the second resin layer is provided in the region where the adjacent linear penetrating grooves are cut A non-through hole that opens to the side facing the first resin layer does not penetrate the second resin layer. By providing such a cut-in pattern 483a, the apparent hardness of the valve becomes small, and it becomes easy to elastically deform toward the hole portion to cover at least a part of the opening edge portion of the hole portion of the first resin layer and/or the inner wall of the hole portion, In addition, it can increase the change of body pressure dispersibility, which can improve the front slip suppression effect when the body pressure of the positioning point is low, and can expand the demand range of the body pressure dispersion performance of the cushion material.

Moreover, as shown in FIG. 12(G), the cutting patterns may be two cutting patterns 493a configured as follows: the lines are symmetrical to each other, and the twelve linear through cutting grooves 493b composed of through slots are intensively crossed at the intersection In addition, a plurality of concentrically-shaped non-penetrating cut-out grooves 493f, which do not penetrate the second resin layer around the intersection of the linear penetrating cut-out grooves 493b as the center, are provided. Furthermore, as shown in FIG. 12(H), there may be two cut patterns 503a configured as follows: the lines are symmetrical to each other, and the twelve linear penetration cut grooves 503b formed by the through slots are wide at the intersection It expands and crosses, and a through hole penetrating through the thickness direction of the second resin layer is provided at the intersection portion, and a plurality of concentric holes that do not penetrate the second resin layer centered on the intersection portion that linearly penetrates the cut groove 503b The circular non-penetrating cut groove 503f. Furthermore, as shown in FIG. 12(I), there may be two cut patterns 513a configured as follows: the lines are symmetrical to each other, and the twelve linear penetration cut grooves 513b formed by the through slots are wide at the intersection. It is expanded and crosses, and a through hole penetrating through the thickness direction of the second resin layer is provided at the intersection portion, and a plurality of non-penetrating second resin layers centered on the intersection portion that linearly penetrates the cut groove 513b are provided The concentric non-penetrating cut groove 513f. By providing the cut patterns 493a, 503a, or 513a as described above, when a vertical load acts on the cut patterns, the valve becomes easily bent and deformed, and the apparent hardness also becomes low, so it is easy to cover the opening edge portion 12b of the hole portion 12a And/or at least a part of the inner wall 12c, and then when the load (stress) due to forward sliding acts on the opening edge 12b of the hole 12a and/or the inner wall 12c, it can be supported with a low body pressure, so that The reliability of the front slip suppression effect is improved, and the apparent hardness of the cut pattern is reduced, so that the body pressure dispersion of the positioning point can be further improved.

Furthermore, as shown in FIG. 12(J), the cutting pattern may also be in the form of: 12 linear penetrating cut-out grooves 523b formed by wide penetrating slots are intersecting with each other in a line-symmetrical shape at the intersection Two cut patterns 523a; and a plurality of straight lines penetrating the cut groove or parallel to the straight line connecting the intersections connecting the two cut patterns 523a and formed at a predetermined distance from the intersection and penetrating the second resin layer or A straight non-penetrating cut groove 523g that does not penetrate the second resin layer. By providing such a cutting pattern 523a and a linear through-cutting groove or a linear non-through-cutting groove 523g, the valve and the peripheral portion of the valve are easily bent and deformed, and the apparent hardness is also reduced, so it is easy to cover the opening of the hole portion 12a At least a part of the edge portion 12b and/or the inner wall 12c can be supported with a low body pressure even when a load is applied to the opening edge portion 12b and/or the inner wall 12c of the hole portion 12a, so the front can be further improved at the same time Slip suppression effect and body pressure dispersion. Furthermore, the position of the intersection of the linear penetrating cut groove or the linear non-penetrating cut groove 523b and the position of the ischium of the seated person can be more accurately and precisely aligned with each other's ischial position data of each person's body, and can be produced The cushion material corresponding to each person's body shape can improve the body pressure dispersion performance of the seated person and the effect of suppressing the previous slip of the seated person according to the body shape of each person. Furthermore, if a plurality of straight cut-through grooves 523g penetrating through the second resin layer are provided, it is desirable to have a structure such that a part of the valve of the cut-out pattern 523a does not fall off. In addition, the linear non-through cut grooves 493f, 503f, 513f, and 523g formed in FIGS. 12(G) to 12(J) may be formed on the surface side of the second resin layer, or may be formed opposite to the hole portion 12a. The side. In addition, instead of these linear non-penetrating cut grooves 493f, 503f, 513f, and 523g, curved non-penetrating cut grooves such as a wave shape or an arc shape may be formed.

FIG. 13 shows a modified example of the hole portion provided in the first resin layer of the cushion material of this embodiment. In the same figure, the front of the cushion material is shown as the upper side of the figure.

As shown in FIG. 13(A), the hole portion may be a hole portion 22a with a bottom (non-penetrating) or no bottom (penetrating) structure as follows: a planar shape having an elliptical shape, and including a correspondence in the hole portion The position 25 of the sitting bone of the seated person and the position 26 corresponding to the coccyx. At least a part of the opening edge and the inner wall in front of the hole 22a constitute a positioning point 22d. Further, as shown in FIG. 13(B), it may be a hole portion 32a having a bottom (non-penetrating) or no bottom (penetrating) structure as follows: a planar shape having an elliptical shape with a recessed central portion, and corresponding to The position 35 of the sitting bone of the seated person is included in the hole portion, and the position 36 corresponding to the coccyx is outside the hole portion. At least a part of the opening edge portion and the inner wall in front of the hole portion 32a constitute a positioning point 32d. Furthermore, as shown in FIG. 13(C), the two hole portions 42a with a bottom (non-penetrating) or without a bottom (penetrating) may be formed as follows: a planar shape having a true circular shape, corresponding to the seated person The position 45 of the ischium is included in each of the two holes, and the position 46 corresponding to the coccyx is outside the hole. At least a part of the opening edge portion and the inner wall in front of the hole portion 42a constitutes the positioning point 42d. Furthermore, as shown in FIG. 13(D), one hole portion 52a with a bottom (non-penetrating) or without a bottom (penetrating) may be formed as follows: it has a rectangular planar shape and corresponds to the seated person The position 55 of the ischial bone is included in the hole, and the position 56 corresponding to the coccyx is outside the hole. At least a part of the opening edge portion and the inner wall in front of the hole portion 52a constitute a positioning point 52d. Furthermore, as shown in FIG. 13(E), it may be a hole portion 62a having a bottom (non-penetrating) or no bottom (penetrating) structure as follows: a planar shape having a semicircular shape and corresponding to the seated person The position 65 of the ischium and the position 66 corresponding to the coccyx are included in the hole portion. At least a part of the opening edge and the inner wall in front of the hole 62a constitute a positioning point 62d. Furthermore, as shown in FIG. 13(F), it may be a bottomed (non-penetrating) or a bottomless (penetrating) three hole portions 72a configured as follows: a plane shape having a true circle or ellipse shape, and corresponding to The position 75 of the ischium of the seat is included in the two holes, respectively, and the position 76 corresponding to the coccyx is included in the remaining holes. At least a part of the opening edge portion and/or the inner wall of the front opening of the two hole portions 72a constitutes the positioning point 72d. The design values such as the distance between ischia can be matched with each person's ischia position data to make it more appropriately and precisely opposed, so the cushion material corresponding to each person's body shape can be made, which can correspond to each person's body shape And the body pressure dispersion performance of the seated person is improved and the effect of suppressing the previous slip of the seated person is further improved. In addition, the shape of the inner wall of each hole portion of FIGS. 13(A) to 13(F) may be formed such that the shape of the hole in the plane view of the first resin layer 12 is constant in the thickness direction, or may be formed as a shape of a hole The thickness direction changes into similar or dissimilar shapes. In addition, as shown in FIGS. 13(C) and 13(F), if a plurality of holes are formed, the shape of the inner wall of each hole may be different.

14 and 15 are diagrams for explaining the effect of the cushion material of this embodiment. However, Fig. 15(B) to Fig. 15(E) show the B-B cross section of Fig. 15(A). This cushion material is a case where the linear penetration cut groove 13b of the cut pattern 13a of the second resin layer 13 extends radially from the intersection, and the terminal end is located in a region within the hole 12a of the first resin layer.

As shown in FIG. 14, when the seated person 17 is seated on the portion of the hole portion 12a of the cushion material 10 of the present embodiment, the valve 13c and the valve 13c in the cut pattern 13a of the second resin layer 13 are cut due to the vertical load The valve peripheral portion 13d is elastically deformed toward the hole portion 12a and covers at least a part of the opening edge portion of the hole portion 12a of the first resin layer 12 and/or the inner wall of the hole portion. 15(B) to 15(E) show the phased elastic deformation of the valve 13c and the valve peripheral portion 13d caused by the vertical load and the load continuing in the horizontal direction. In this way, since the valve 13c and the valve peripheral portion 13d are bent downward to cover the opening edge portion 12b of the hole portion 12a, the body pressure of the seated person is well dispersed in this portion, and as the valve 13c bends and deforms, the adjacent valve 13c The space (the width of the cut-in portion) is enlarged and the proportion of the space between the valves 13c is increased (not shown). Therefore, the body pressure dispersion performance is further improved and the peripheral portion 17a of the ischium is stably supported to improve the stability of the seat. In addition, since the curved valve 13c and the valve peripheral portion 13d covering the curved positioning point 12d constituted by the front opening edge and at least a part of the inner wall softly abut and support the front edge of the ischium of the seated person, the ischium Movement to the front will be moderately inhibited. For example, the contact pressure with the positioning point 12d will increase rapidly and the blood flow will not be partially blocked. This will effectively suppress forward slip. Also, depending on the combined conditions or load conditions of the shape or size of the hole portion 12a and the valve 13c and the valve peripheral portion 13d, as shown in FIG. 15(D), the valve 13c and the valve peripheral portion 13d abut against the opening edge of the hole portion 12a The portion 12b does not abut on the inner wall 12c, or may be in the form of an example that abuts on the opening edge 12b and partially or wholly abuts on the inner wall 12c as shown in FIG. 15(E). If the valve 13c and the valve peripheral portion 13d do not abut the entire surface of the inner wall 12c, as shown in FIGS. 15(D) and 15(E), a gap is formed between the inner wall 12c and the valve 13c and the valve peripheral portion 13d. The voids function to improve the body pressure dispersion performance. In this way, according to the cushion material 10 of the present embodiment, the predetermined body pressure dispersion performance can be maintained, and the seat stability can be improved together with the front slip suppression effect. Furthermore, when the hardness of the valve peripheral portion 13d is high, as shown in FIG. 15(D), the upper end portion of the curved valve peripheral portion 13d also functions as a positioning point 12e.

FIG. 16 is a diagram for explaining the effect of the modification of this embodiment. However, Fig. 16(B) ~ Fig. 16(E) show the C-C cross section of Fig. 16(A).

This modified aspect is a case where the length of the linear through cut groove 13b' in the cut pattern 13a' of the second resin layer is long, and a part of it extends beyond the area outside the hole portion 12a of the first resin layer. That is, it is a case where the linear penetration cut-out groove 13b' of the cut-out pattern 13a' extends radially from the intersection as a starting point, and the terminal end is located in a region outside the hole 12a of the first resin layer. It can be seen from FIGS. 16(B) to 16(E) that the stepwise elastic deformation of the valve 13c′ of the cut-in pattern 13a′ caused by the vertical load and the horizontal load continues to be changed. In this case, because the valve 13c' is bent downward to cover the opening edge of the hole 12a, the body pressure of the seated person is well dispersed in this part, and as the valve 13c' bends and deforms, the adjacent valve 13c' The width (the width of the cut-in portion) is enlarged to increase the ratio of the gap between the valves 13c' (not shown), so that the body pressure dispersion performance is further improved, the peripheral portion of the ischium can be stably supported, and the seat stability is improved. In addition, since the curved valve 13c' covering the positioning point 12d composed of at least a part of the front opening edge and/or the inner wall softly abuts and supports the front edge of the ischium of the seated person, the ischium moves forward The movement of the side is gently suppressed, the contact pressure with the positioning point 12d rises rapidly, and the situation that the blood flow is partially blocked does not occur, effectively suppressing forward slip. Also, depending on the combined conditions or load conditions of the shape or size of the hole portion 12a and the valve 13c′, as shown in FIG. 16(D), the valve 13c′ abuts the opening edge portion 12b of the hole portion 12a but does not abut An example of the wall 12c, or as shown in FIG. 16(E), is an abutment on the opening edge portion 12b and an example of an example in which the inner wall 12c is partially or fully abutted. If the valve 13c' does not contact the entire surface of the inner wall 12c, a gap is formed between the inner wall 12c and the valve 13c' as shown in FIGS. 16(D) and 16(E), and this gap functions to make the body pressure dispersion performance improve. In this way, it is also possible to maintain the predetermined body pressure dispersion performance by the cushion material of this modified form, and it is possible to jointly improve the stability of the seat and the suppression effect of the front slip. Furthermore, when the hardness of the valve 13c' is high, as shown in Fig. 16(D), the upper end of the curved valve 13c' becomes the positioning point 12e'.

FIG. 17 is a comparison showing the structure of the cushion material of the present embodiment and its modified form, and FIG. (A) shows the plane of the first resin layer 12 and the second resin layer 13 of the embodiment and the cross section of the DD line, the same FIG. (B) shows the plane of the modified first resin layer 12" and the second resin layer 13" and its EE line cross section.

In the cushioning material of the present embodiment, as shown in FIG. 17(A), the second resin layer 13 is provided with a cut-out pattern 13a in a region facing the hole portion 12a of the first resin layer 12, and the cut-out pattern 13a is penetrated by The slit is a plurality of linear cut-through grooves 13b. With such a configuration, the adjacent linear cut-through pattern 13a penetrates the region between the cut-out groove 13b, that is, the valve 13c and the valve peripheral portion 13d are bent toward the hole portion 12a and are elastically deformed to cover the opening of the hole portion 12a of the first resin layer 12 Since at least a part of the inner wall 12c of the rim portion 12b and/or the hole portion 12a covers the opening edge portion and the periphery of the opening edge portion of the hole portion 12a, the peripheral portion of the ischium is subjected to the downwardly curved valve 13c and the valve peripheral portion 13d It is supported, and as the valve 13c bends and deforms, the space between the adjacent valves 13c (the width of the cut-in portion) expands to increase the proportion of the gap between the valves 13c, thereby dispersing the body pressure of the seated person well, and the ischial The peripheral part is stably supported to improve the stability of the seat. In addition, when the load (stress) due to front slippage acts in the direction of the opening edge 12b and/or the inner wall 12c of the hole 12a, since at least a part (positioning point) of the opening edge and/or the inner wall covering the front is covered The curved valve 13c and valve peripheral portion 13d softly abut and support the front edge of the ischium of the seated person, so the movement of the ischium toward the front is gently suppressed, the contact pressure with the anchor point rises rapidly, and the blood flow is partially The blocking situation does not occur, effectively inhibiting forward slip.

On the other hand, in the cushion material of the modified aspect, as shown in FIG. 17(B), the second resin layer 13" is provided in a region opposed to the hole portion 12a" of the first resin layer 12". The penetrating cut-out pattern 13a" is composed of a plurality of linear non-penetrating cut-out grooves 13b" formed by a non-penetrating slot opened on the side of the hole portion 12a". With this structure, the groove of the non-penetrating cut-out pattern 13a" The inter-region 13c" and the peripheral part 13d" of the inter-channel region continuous with the inter-channel region 13c" are bent toward the hole 12a" and elastically deformed, and cover the opening edge 12b" of the hole 12a" of the first resin layer 12" And/or at least a part of the inner wall 12c" of the hole part a", since at least a part of the opening edge and/or inner wall of the hole part 12a" is covered, the peripheral part of the ischium is affected by the inter-groove region and the groove bent downward The peripheral part of the inter-region is supported, and as the inter-groove region flexes and deforms, the width of the adjacent inter-groove region expands to increase the proportion of voids, thereby dispersing the body pressure of the seated person well, and the peripheral part of the ischium is stably received Support to improve seat stability. In addition, when the load (stress) due to forward sliding acts on the opening edge 12b" and/or the inner wall 12c" of the hole 12a", it covers at least a part of the front opening edge and/or the inner wall (locating point) ) The curved inter-groove area 13c" and the inter-groove area peripheral portion 13d" softly abut and support the front edge of the ischium of the seated person, so the movement of the ischium to the front is gently inhibited and contact with the positioning point The pressure rises rapidly and the blood flow is partially prevented from occurring, which effectively suppresses the forward slip. In the cushioning material of the present invention, all the above-mentioned modified examples and cutting patterns of the modified patterns can be cut to have such a reason The linear non-penetrating cut grooves formed by the non-penetrating slits are formed by the non-penetrating cut patterns. Furthermore, the linear non-penetrating cut grooves 13b" are linear in this embodiment, but as long as they are adjacent to each other, the linear shape The shape of the inter-groove region 13c" may be formed by non-penetrating into the groove, and it may be formed into a curved shape such as a linear shape, a wavy shape, an arc shape, or the like, or the line width is constant or changes in the longitudinal direction.

FIG. 18 shows an example in which the cushion material of this embodiment is applied to a seat surface of a wheelchair.

As shown in the figure, by placing a cushion material of a basic structure on the seat surface 18a of the wheelchair 18, the basic structure includes: a first resin layer (ischial portion storage layer) 12 having a hole portion 12a and a cut The second resin layer (ischium support layer) 13 of the pattern 13a applies the cushioning material of the present embodiment to a wheelchair, can maintain a predetermined body pressure dispersion performance, and can improve the effect of suppressing seat stability and forward slip. In addition, the cushion material of this embodiment can be applied to a cushion material of a mattress or a cushion material of a seat surface of a vehicle seat. If the cushioning material is applied to a mattress, the predetermined body pressure dispersion when lying on the mattress or sitting can be maintained, and the improvement of the stability of the seat and the suppression of forward slip can be achieved. The predetermined lying posture or seat posture when seated is not good, in particular, it is possible to suppress forward slippage when lifting the back of a mattress having a back lifting function. Even in the case of a cushion material suitable for a seat surface of a vehicle seat, a predetermined body pressure dispersion performance can be maintained, and the effect of suppressing seat stability and front slip can be improved.

FIG. 19 schematically shows the structure of a cushion material according to another embodiment of the present invention.

As shown in the figure, the cushion material of the present embodiment has a structure in which a first resin layer is laminated on a base layer 21 composed of a resin foam such as polyurethane resin through an adhesive layer as necessary. (Sciatic part storage layer) 12, the second resin layer (ischia support layer) 13 must be laminated on the first resin layer 12 through the adhesive layer, and the third resin layer can be laminated on the second resin layer 13 through the adhesive layer as necessary (Body pressure dispersing and imparting layer) 14.

The base layer 21 is formed by molding a resin foam such as polyurethane resin into a flat plate shape, and is provided to increase the mechanical strength of the cushion material to prevent the seated person from bottoming out. At both end portions in the front-back direction of the base layer 21, a hard portion 21a composed of a synthetic resin foam that is harder than the synthetic resin foam constituting the layer is provided. As a result, the mechanical strength of both end portions of the cushion material is further improved, and the stability of the user's seat posture in the left-right direction is improved, thereby maintaining a stable seat posture even when applied to a wheelchair. In addition, in the modified aspect of this embodiment, the first resin layer 12 and/or the second resin layer 13 may be provided with the same hard portion as the base layer 21.

In the present embodiment, the configuration, operational effects, and modified aspects of the other first resin layer 12, second resin layer 13, and third resin layer 14 are the same as those in the above-described embodiment, and therefore detailed descriptions are omitted.

[Example] Hereinafter, the comparative tests of Example 1, Comparative Example 1 and Comparative Example 2 of the cushion material of the present invention will be described.

(Example 1) Fabrication of the cushioning material of the structure of FIG. 1: a basic structure in which the first resin layer (ischilas accommodating layer) 12 and the second resin layer (ischia support layer) 13 shown in FIGS. 2 to 5 are layered through adhesion The laminated body (cushion material) is laminated with the base layer 11 through the adhesive under the first resin layer (ischium storage layer) 12 of the laminated body, and the third layer is not laminated on the second resin layer 13 Resin layer 14 (body pressure dispersion layer). Polyurethane resin foam (Toyo Quality One Corporation / Toyo Quality One Corporation) model number Labrake 33H (rubberlike 33H) manufactured according to JIS 　K6400-2 A method was used as the constituent material Hardness 190N). For the base layer 11, a rectangular shape having a size of 400 mm×400 mm×20 mm is used. The shape and size shown in FIG. 20 are used for the first resin layer 12. For the second resin layer 13, the shape and size shown in FIG. 21 are used. For the third resin layer 14, the shape and size shown in FIG. 22 are used. The overall thickness is 75mm. In addition, the unit of dimensions in FIGS. 20-22 is mm.

(Comparative example 1) The well-known cushion material made by the applicant in this case, that is, aPLA cushion (model KC-WP4040) was used. This cushioning material is a cushioning material described in Patent Document 2, and is a body pressure dispersion of a polyurethane resin foam system having a plurality of block members defined by a plurality of non-through grooves on the upper surface A cushion material composed of a low-reflection polyurethane layer is stacked on the imparting layer (corresponding to the third resin layer 14 shown in FIG. 1). The overall thickness is 60mm.

(Comparative example 2) Except for the second resin layer in the cushion material of Example 1, the second resin layer does not have a cut-in pattern and has a flat surface free of irregularities or holes, and the other cushion material has the same structure as the cushion material of Example 1. Polyurethane resin foam (manufactured by Toyo Quality One Corporation / Toyo Quality One Corporation) 　 model ラバーライク 33H (rubberlike 33H), based on JIS 　K6400-2　A method Hardness 190N). The overall thickness is 75mm.

(First comparative test) In order to verify the effect of suppressing the front slip of the cushioning material, the tensile force was measured using the measuring device for comparative test shown in FIG. 23 for the examples, comparative examples 1 and comparative examples 2. As shown in the figure, place the cushion material C(10) to be verified on the trolley T that moves freely in the horizontal direction, and place the hips simulating the sitting posture on the upper surface of the cushion material C(10) to the inside of the thigh The seat cushion plate P on which the hammers W of various weights (10, 15, 20, 25, 30 kg) are placed via an axis S supported by the support frame F so as to move freely in the vertical direction A vertical load is applied, and the trolley T is dragged in the horizontal direction through the digital dynamometer G at a fixed speed (50 mm/sec), thereby measuring the peak value of the tensile force indicated by the digital dynamometer G. The larger the peak value of the tensile force, the higher the ability to bear the load at the positioning point, and it is judged that the front slip suppression effect is excellent. The peak value is measured five times for each hammer, and the average value is calculated. The measurement results are shown in Table 1. The unit of peak tension is kgf. In addition, the seat cushion P is a size reduced to 70% using a cushion of the shape prescribed by JIS　S1203. This is due to the average Japanese size.

[Table 1]

Fig. 24 shows the relationship between the weight of the hammer (kg) and the average value of the measured tensile force (kgf) in the measurement results of the first comparative test shown in Table 1. As can be seen from the same figure, in Example 1 provided with the laminate of the first resin layer (ischial portion storage layer) and the second resin layer (ischial support layer), compared with the first resin layer (ischial portion storage) Layer) and the second resin layer (ischium support layer) of the laminated body of Comparative Example 1, and the second resin layer of the laminated body of the Comparative Example 2 does not have a cut pattern, in various vertical weighting, the pulling force is large, and the front slip is suppressed The effect is excellent.

(Second comparison test) In order to verify the body pressure dispersibility of the general seat, the body pressure dispersion properties of Example 1, Comparative Example 1 and Comparative Example 2 were measured. The measurement is carried out by installing a surface pressure sensor XSENSOR PX100.36.36.02 made by XSENSOR Technology Corporation on the seat surface of a wheelchair (Wheelchair MYU4-22 manufactured by ミキ社, Inc.), resulting in a height of 170cm and a weight of 65kg A subject with a BMI (obesity index) of 22.5 was seated on it, and the surface pressure distribution after 5 minutes of sitting was measured. The measurement result of the surface pressure (body pressure) distribution is shown in FIG. 25. The same figure (A) is the cushion material of Example 1, the same figure (B) is the cushion material of Comparative Example 1, and the same figure (C) is the measurement result of the cushion material of Comparative Example 2.

As can be seen from FIG. 25, in Example 1 provided with the laminated body of the first resin layer (ischial portion storage layer) and the second resin layer (ischial support layer), compared to the first resin layer (ischial portion storage) Layer) and the second resin layer (ischium support layer) of the laminated body of Comparative Example 1, and the second resin layer of the laminated body of Comparative Example 2 does not have a cut-out pattern, the body pressure of the entire seat surface is low, and its change is small, The body pressure dispersion is remarkably excellent.

(3rd comparative test) In order to verify the dispersion of body pressure (the effect of suppressing the increase in body pressure) at the positioning point (area) when the sitting posture is shifted forward (the sitting posture in the forward sliding state), the cushion materials of Example 1 and Comparative Example 2 are used. The body pressure dispersion performance was measured when the seat posture in the forward sliding state was performed. The measurement is carried out by installing a surface pressure sensor XSENSOR PX100.36.36.02 made by XSENSOR Technology Corporation on the seat surface of a wheelchair (Wheelchair made by MIKI Co., Ltd. (MIKI Co., Ltd.) MYU4-22). A subject with a height of 170 cm, a weight of 65 kg, and a BMI (obesity index) of 22.5 was seated thereon, and the surface pressure distribution was measured 5 minutes after sitting. The measurement result of this surface pressure (body pressure) distribution is shown in FIG. 26. The figure (A) is the cushion material of Example 1, and the figure (B) is the measurement result of the cushion material of Comparative Example 2.

As can be seen from FIG. 26, in Example 1 provided with the laminate of the first resin layer (ischial portion storage layer) and the second resin layer (ischial support layer), compared to the first resin layer (ischial portion storage layer) ) And the second resin layer of the laminate of the second resin layer (ischium support layer) does not have a cut-out pattern of Comparative Example 2, the maximum pressure in the positioning area is the same, but the range of the maximum pressure becomes smaller, the body of the positioning point The pressure rise suppression effect is very excellent.

As can be seen from the first to third comparative tests described above, the cushioning material according to Example 1 has a front slip suppression effect and a body pressure dispersion performance when seated compared to the cushioning materials of Comparative Examples 1 and 2. Very good, and the effect of suppressing the increase in body pressure in the area of the positioning point when the seat stability and the front slip are suppressed.

The above-described embodiments are all illustrative of the present invention and not limiting, and the present invention can be implemented with various other modified forms and modified forms. Therefore, the scope of the present invention is only stipulated by the scope of patent application and its equivalent.

10, C: cushion material 11,21: basal layer 1 12,12″: the first resin layer 12a, 12a″, 22a, 32a, 42a, 52a, 62a, 72a: holes 12b, 12b″: opening edge 12c, 12c″: inner wall 12d, 12e, 12e′, 22d, 32d, 42d, 52d, 62d, 72d: anchor point 13,13″: 2nd resin layer 13a,13a′,23a,33a,43a,53a,63a,93a,103a,113a,123a,133a,143a,153a,163a,173a,173a,193a,203a,213a,223a,233a,243a,253a,263a ,273a,283a,293a,303a,313a,323a,333a,343a,353a,363a,373a,383a,393a,403a,413a,423a,433a,443a,453a,463a,473a,483a,493a,503a,513a ,523a: Cut into the pattern 13a″: non-through cut-in pattern 13b,13b′,73b,83b,153b,163b,173b,183b,213b,223b,293b,303b,313b,323b,393b,403b,413b,423b,493b,503b,513b,523b: linear through cut groove 13b″: linear non-penetrating cut groove 13c,13c′: Tab (valve) 13c″: inter-groove area 13d: Peripheral part of the tab area (peripheral part of the valve) 13d″: Peripheral area between the trenches 14: 3rd resin layer 14a: Non-through groove 14b: Block widget 17: Seat 17a: Peripheral part of ischia 18: Wheelchair 18a: seat surface 21a: Hard part 25,35,45,55,65,75: corresponding to the position of the ischium 26,36,46,56,66,76: corresponding to the position of the coccyx 73e, 83e: intersection 153f,163f,173f,293f,303f,313f,393f,403f,413f,493f,503f,513f: non-through cut-in groove 183g, 213g, 223g, 323g, 423g, 523g: straight non-through cut groove F: Support stand G: digital dynamometer P: seat cushion S: axis T: trolley W: Hammer

FIG. 1 is an exploded perspective view schematically showing the structure of a cushion material according to an embodiment of the present invention. FIG. 2 is an exploded perspective view schematically showing the configuration of the first resin layer and the second resin layer, which are the main components of the cushion material according to the embodiment of FIG. 1. 3 is a perspective view schematically showing the configuration of the first resin layer and the second resin layer, which are the main components of the cushion material according to the embodiment of FIG. 1. Fig. 4 is a cross-sectional view taken along line A-A of Fig. 5. 5 is a plan view schematically showing the configuration of the second resin layer of the cushioning material of the embodiment of FIG. 1 when it is not deformed and when it is deformed. 6 is a plan view showing a modified example of the combination of the hole portion and the cut pattern of the cushion material of the embodiment of FIG. 1. 7 is a plan view showing a modification example of the cut pattern of the cushion material of the embodiment of FIG. 1. Fig. 8 is a plan view of a modified example of the cut pattern of the cushion material of the embodiment of Fig. 1. Fig. 9 is a plan view of a modified example of the cut pattern of the cushion material according to the embodiment of Fig. 1. Fig. 10 is a plan view of a modified example of the cut pattern of the cushion material of the embodiment of Fig. 1. Fig. 11 is a plan view of a modified example of the cut pattern of the cushion material according to the embodiment of Fig. 1. Fig. 12 is a plan view of a modified example of the cut pattern of the cushion material of the embodiment of Fig. 1. Fig. 13 is a plan view showing a modified example of the hole portion of the cushion material of the embodiment of Fig. 1. 14 is a diagram for explaining the effect of the cushioning material of the embodiment of FIG. 1. 15 is a diagram for explaining the effect of the cushioning material of the embodiment of FIG. 1. FIG. 16 is a diagram for explaining the effect of the modification of the embodiment of FIG. 1. FIG. 17 is a plan view and a cross-sectional view showing the configuration of the cushion material of the embodiment of FIG. 1 and its modified form. 18 is a perspective view showing an example of applying the cushioning material of the embodiment of FIG. 1 to the seat surface of a wheelchair. 19 is an exploded perspective view schematically showing the structure of a cushion material according to another embodiment of the present invention. 20 is a plan view and a side view showing the shape and dimensions of the first resin layer of Example 1 of the cushioning material of the present invention. 21 is a plan view and a side view showing the shape and dimensions of the second resin layer of Example 1 of the cushioning material of the present invention. 22 is a plan view, a front view, and a side view showing the shape and dimensions of the third resin layer of Example 1 of the cushioning material of the present invention. 23 is a schematic diagram illustrating the configuration of the first comparative test measuring device of Example 1, Comparative Example 1 and Comparative Example 2 of the cushioning material of the present invention. 24 is a characteristic diagram showing the measurement results of the sliding force before Example 1, Comparative Example 1 and Comparative Example 2 of the cushion material of the present invention. 25 is a pressure characteristic diagram showing the body pressure dispersibility of Example 1, Comparative Example 1, and Comparative Example 2 of the cushion material of the present invention. 26 is a pressure characteristic diagram showing the body pressure dispersibility of the positioning points of Example 1 and Comparative Example 2 of the cushion material of the present invention.

10: cushion material

11: basal layer

12: 1st resin layer

12a: Hole

12b: opening edge

12c: inner wall

12d: anchor point

13: Second resin layer

13a: Cut in the pattern

13b: linear through cut

14: 3rd resin layer

Claims (30)

A cushion material having a structure in which a second resin layer is laminated on a first resin layer is characterized by: The first resin layer has at least one hole portion with or without bottom, The second resin layer includes at least one cut pattern at least in an area facing the hole portion, the at least one cut pattern intersects each other at a predetermined intersection through the thickness direction of the second resin layer At least 3 linear cut-through grooves, The cantilever-shaped projecting piece formed by the line-shaped region penetrating between the cutting grooves adjacent to the cutting pattern and the peripheral portion of the projecting piece region continuous with the root of the projecting piece are configured to be elastically deformable, The peripheral portion of the protruding piece and/or the protruding piece area is configured to elastically deform toward the hole portion to cover the opening edge portion of the hole portion and/or the hole portion when a vertical load acts on the cutting pattern At least a part of the inner wall. The cushion material according to claim 1, wherein the linear through-cut groove is formed by a through slot. The cushion material according to claim 1 or 2, wherein the two aforementioned cut-in patterns are arranged at mutually different positions in a region facing the hole portion. According to the cushioning material of claim 3, the distance between the intersections of the two linear cut-through patterns of the aforementioned cut-through patterns is 110-140 mm. The cushioning material according to claim 3, wherein the second resin layer includes: a plurality of linearly penetrating cut-through grooves penetrating the second resin layer, or a linear non-penetrating cut-through groove not penetrating the second resin layer, the aforementioned A plurality of linear through cut grooves or linear non-through cut grooves are parallel to a straight line between the intersections of the linear through cut grooves connecting the two cutting patterns, and are formed at a predetermined distance from the intersection. According to the cushion material of claim 1 or 2, three of the aforementioned cut-in patterns are arranged at mutually different positions in a region facing the hole portion. The cushioning material according to claim 1 or 2, wherein the cut-in pattern is a cut-in pattern provided at a position opposed to the center of the hole portion if the hole portion is one, The hole portion is divided into 2 areas with 2 cut patterns each at a position facing the ischium of the seated person, or 3 cut patterns provided at positions facing the 3 areas with the hole portion divided into 3 Pattern, of which 2 cut-in patterns are set opposite the seat bone of the seated person, If there are two hole portions, it is two cut patterns provided at positions facing each of the two hole portions and the ischium of the seated person, When the number of the hole portions is three, it is three cut patterns provided at positions facing each of the three hole portions, and two of the cut patterns are provided at positions facing the ischial bones of the seated person. The cushion material according to claim 1 or 2, wherein the length of the aforementioned linear through-cut groove is 20 mm or more. The cushion material according to claim 1 or 2, wherein the cut pattern includes a plurality of concentric circular non-penetrating cut grooves centered on the intersection portion of the linear penetrating cut groove and not penetrating the second resin layer. The cushion material according to claim 1 or 2, wherein the cutting pattern includes a plurality of concentric polygonal non-penetrating cutting grooves centered on the intersection portion of the linear penetrating groove and not penetrating the second resin layer. The cushion material according to claim 1 or 2, which is provided with a through hole penetrating in the thickness direction of the second resin layer in the region of the linear penetration between the cut grooves adjacent to the cut pattern, or with the first The opposite side of the resin layer is formed as a non-through hole that does not penetrate the second resin layer. The cushion material according to claim 1 or 2, wherein the hole portion of the first resin layer is constituted by a bottomless hole penetrating the first resin layer. The cushion material according to claim 1 or 2, further comprising a third resin layer laminated on the surface of the second resin layer opposite to the first resin layer, The third resin layer has a plurality of block members partitioned by non-penetrating grooves and having openings on the surface opposite to the surface facing the second resin layer. The non-penetrating grooves are formed so as to affect the first 3 The part of the resin layer that has a greater load in the vertical direction. The cushion material according to claim 1 or 2 further includes a base layer made of resin and having an area layer on the side of the first resin layer opposite to the second resin layer. The cushion material according to claim 14, wherein at least one of the first resin layer, the second resin layer, and the base layer is provided with a harder resin than the resin constituting each layer at both ends of the cushion material in front and rear directions The hard part made of resin foam. The cushion material according to claim 1 or 2, wherein the adhesive layer is at least interposed between the first resin layer and the second resin layer. The cushion material according to claim 14, wherein at least one of the first resin layer, the second resin layer, and the base layer is composed of a resin foam or a three-dimensional mesh structure. If the cushion material of claim 1 or 2, it is a cushion material for the seat surface of a wheelchair. If the cushion material of claim 1 or 2, it is a cushion material of a mattress. If the cushion material of claim 1 or 2, it is a cushion material of a seat surface of a vehicle seat. A cushion material is a cushion material having a structure in which a second resin layer is laminated on a first resin layer, The first resin layer has at least one hole portion with or without bottom, The second resin layer includes at least one non-penetrating cut-out pattern in an area facing at least the hole portion, the at least one non-penetrating cut-out pattern is open to the side opposite to the first resin layer, and each is formed by It is composed of at least three linear non-penetrating cut grooves that intersect each other at predetermined intersections without penetrating the second resin layer, The inter-groove area between the linear non-penetrating cut grooves adjacent to the non-penetrating cut pattern and the peripheral portion of the inter-groove area continuous with the inter-groove area are configured to be elastically deformable, The inter-groove region and/or the inter-groove region peripheral portion are configured to elastically deform toward the hole portion to cover the opening edge portion of the hole portion and/or the hole portion when a vertical load acts on the non-penetrating cut pattern At least a part of the inner wall. The cushion material of claim 21, wherein the hole portion of the first resin layer is a bottomless hole penetrating the first resin layer. The cushioning material according to claim 21 or 22 further includes a third resin layer stacked on the surface of the second resin layer opposite to the first resin layer, The third resin layer has a plurality of block members on a surface opposite to the surface facing the second resin layer, the plurality of block members have openings and are divided by non-penetrating grooves, and the non-penetrating grooves are A portion with a greater vertical load acting on the third resin layer is formed. The cushioning material according to claim 21 or 22 further includes a base layer, and the base layer is laminated on the surface of the first resin layer opposite to the second resin layer and made of resin. The cushion material according to claim 24, wherein at least one of the first resin layer, the second resin layer, and the base layer is provided with hard portions on both end portions in the front and rear directions of the cushion material, and the hard portion It is composed of a resin foam harder than the resin constituting each layer. The cushion material according to claim 21 or 22, wherein the adhesive layer is at least interposed between the first resin layer and the second resin layer. The cushion material according to claim 24, wherein at least one of the first resin layer, the second resin layer, and the base layer is composed of a resin foam or a three-dimensional mesh structure. If the cushion material of claim 21 or 22 is a cushion material for a seat surface of a wheelchair. If the cushion material of claim 21 or 22 is a cushion material for a mattress. The cushion material of claim 21 or 22 is a cushion material of a seat surface of a vehicle seat.

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