cushion body

Abstract

To provide a cushioning body that is excellent in durability and cushioning properties, and can exhibit uniform cushioning properties and heat insulation properties by being smoothly curved along the curved surface of a curved object or a curved surface part of the body.SOLUTION: A cushioning body that comprises a solid knitted fabric 1, and a nonwoven fabric 2 arranged by being laminated on the solid knitted fabric 1 is such that: the solid knitted fabric 1 is configured of a front side ground knit texture 11 and a rear side ground knit texture 12 connected by connecting yarns 13, 13..., or the front side ground knit texture 11 and pile textures 15,15...; the solid knitted fabric 1 and the nonwoven fabric 2 are laminated and united in the thickness direction; and in any of the front side ground knit texture 11 and a texture of the opposite surface in the solid knitted fabric 1, the stretchability is larger than in the nonwoven fabric 2.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a cushion body that is used by being wrapped around an article to protect the article by dispersing pressure from a load, or to protect a body from impacts. Background Art

[0002] Nonwoven fabric is a type of cloth produced by bonding natural fibers or synthetic fibers with an adhesive or the fusion force of the fibers themselves. Unlike fabrics produced by weaving, knitting or papermaking, nonwoven fabric is formed by entangling fibers via mechanical, chemical or thermal methods, so the bonding between fibers is loose, making the nonwoven fabric bendable and soft. In addition, since most fibers are oriented in the planar direction, nonwoven fabric is characterized by less discomfort such as fibers pricking the skin when touched. Furthermore, it also has appropriate repulsive force, so it is widely used as a cushion material.

[0003] However, since nonwoven fabric retains its shape by means of fiber entanglement, when it is subjected to repeated loads or continuous loads in the thickness direction, the gaps between fibers formed by entanglement gradually decrease. Therefore, a cushion composed only of nonwoven fabric has a problem in that repulsive force decreases with use, causing the cushion to lose its function as a cushion.

[0004] In view of this, cushion bodies have been conventionally developed that combine a nonwoven fabric which has good skin feel, appropriate elasticity and deflection amount (hereinafter referred to as "cushioning properties"), and a three-dimensional knitted fabric that can maintain cushioning properties even when subjected to repeated loads. For example, Patent Document 1 discloses a technique for a mat aimed at preventing bedsores, the mat having a configuration in which a three-dimensional knitted fabric and a nonwoven fabric as a water-absorbent quick-drying fabric are bonded together.

[0005] According to the technology described in Patent Document 1, the water-absorbing and quick-drying fabric (nonwoven fabric) can quickly absorb and diffuse moisture such as sweat, thus maintaining a consistently low humidity level. Furthermore, the three-dimensional knitted fabric distributes body weight, preventing localized high pressure and thus reducing the likelihood of bedsores.

[0006] Furthermore, Patent Document 2 discloses a bra pad technology that does not deteriorate with washing, is comfortable against the skin, and has high resilience even if it becomes partially indented.

[0007] The bra pad described in Patent Document 2 comprises an outer layer and an inner layer that is placed on the skin side. The outer layer is a three-dimensional knitted fabric and is composed of a surface knitted layer, a back knitted layer, and connecting yarns that connect them three-dimensionally. The inner layer is made of a nonwoven fabric. Then, a heat adhesive is applied between the outer layer and the inner layer, and after overlapping them, the two layers are heat-compressed into a cup shape by pressing to form the bra pad.

[0008] According to the technology described in Patent Document 2, unlike conventional bra pads made solely of nonwoven fabric, the inner layer, which is the part closest to the skin, uses a soft nonwoven fabric, while the outer layer uses a double-knit structure of thermoformable synthetic fiber knitting. This configuration not only provides breast shape retention and a soft feel against the skin, but also has particular resilience, preventing the cup-shaped portion from becoming dented even if some force is applied during storage, and returning to its original cup shape. [Prior art documents] [Patent Documents]

[0009] [Patent Document 1] Japanese Patent Application Publication No. 9-70339 [Patent Document 2] Japanese Patent Publication No. 2000-226704 [Overview of the project] [Problems that the invention aims to solve]

[0010] Incidentally, if nonwoven fabric is completely crushed in the thickness direction due to load or impact, the force will be directly transmitted through the crushed nonwoven fabric, impairing its function as a cushion. Therefore, when using nonwoven fabric as a cushioning material, it is necessary to use nonwoven fabric that is thick enough so that it does not completely crush under load or impact. When a thick nonwoven fabric is curved and wrapped around an object or attached to clothing, the outer surface of the curved nonwoven fabric is stretched, while the inner surface contracts. Because nonwoven fabrics are loosely bonded together by intertwining fibers, there are gaps between the fibers. The fibers of the nonwoven fabric can elastically deform in these gaps, giving it a certain degree of elasticity.

[0011] However, as mentioned above, with thick nonwoven fabrics, if the inner surface is curved in such a way that it shrinks significantly, the inner surface of the nonwoven fabric may not shrink completely and will fold. As a result, a part of the inner surface bends at a sharp angle, preventing it from forming a smooth arc, and making it impossible to conform to the curved surface of an object or the human body. Therefore, in the bent sections, the elasticity of the nonwoven fabric decreases, resulting in a problem where it cannot provide sufficient cushioning.

[0012] Thus, when examining conventional technologies for use by wrapping, it appears that the technology described in Patent Document 1 is for a mattress for a bed, and since it is used by being placed on a bed, it is not intended to be used in a curved position. Therefore, although the structure is a combination of nonwoven fabric and three-dimensional knitted fabric, it is mentioned that the nonwoven fabric needs to be water-absorbent and quick-drying, and the three-dimensional knitted fabric needs to be pressure-distributing, but there is no mention whatsoever of the elasticity of the nonwoven fabric, the elasticity of the knitted structure on the front and back surfaces of the three-dimensional knitted fabric, or the bending of the connecting yarns.

[0013] On the other hand, Patent Document 2 discloses a technique for shaping a three-dimensional knitted fabric and a nonwoven fabric into a cup shape and integrating them. However, the bra pads in Patent Document 2 are not formed by wrapping, but rather by heat press molding using a mold, which applies high heat and pressure.

[0014] In order to improve the fit, a thick nonwoven fabric is generally placed on the inside of the curved surface that faces the skin. However, as mentioned above, the inner surface of the curve shrinks considerably. However, even if the nonwoven fabric is thick and does not easily form a smooth curve when bent, the pressure applied during molding will cause it to be molded into a smooth curve that conforms to the shape of the mold.

[0015] Thus, in the technology described in Patent Document 2, the nonwoven fabric is arranged on the inside of the curve, but this is based on the premise of molding by a mold. Therefore, it can be said that there is little need to examine in detail the elasticity of the nonwoven fabric, the elasticity of the knitted fabric structure on the front and back surfaces of the three-dimensional knitted fabric, and the deflection of the connecting yarn.

[0016] As mentioned above, conventionally, cushioning materials that can be wrapped around articles or attached to clothing, and that can be smoothly curved to conform to the surface of the object being protected, have not been considered.

[0017] This invention has been made in view of the above-mentioned problems, and its objective is to provide a cushioning body that not only has excellent durability and cushioning properties, but can also smoothly curve along curved surfaces of curved articles or curved parts of the body to exhibit uniform cushioning and heat retention. [Means for solving the problem]

[0018] The means employed by the inventors to solve the above problems are described below. The present invention comprises a three-dimensional knitted fabric and a nonwoven fabric laid on top of the three-dimensional knitted fabric. The three-dimensional knitted fabric has a front side knitted structure and a back side knitted structure connected by a connecting yarn. Connectis configured. The three-dimensional knitted fabric and the non-woven fabric are laminated and integrated in the thickness direction. Furthermore, the present invention is characterized in that in both the front side knitted structure and the back side knitted structure of the three-dimensional knitted fabric, the stretchability in the plane direction is greater than that of the non-woven fabric, and when the three-dimensional knitted fabric and the non-woven fabric are curved such that the contact surface between the three-dimensional knitted fabric and the non-woven fabric contracts, the tendency of the non-woven fabric to bend is pulled back by the stretchability of the ground knitted structure of the three-dimensional knitted fabric and the elasticity of the connecting yarns, and the three-dimensional knitted fabric and the non-woven fabric are laminated and integrated so that they can be curved into a smooth curved surface without bending the non-woven fabric.

[0019] In the lamination integration of the three-dimensional knitted fabric and the non-woven fabric, as long as the three-dimensional knitted fabric and the non-woven fabric are integrated to such an extent that they curve together when the cushion body is bent, it is included in the lamination integration configuration of the present invention. In addition, the present invention is not limited to the configuration in which the non-woven fabric is laminated and integrated on one knitted fabric of the three-dimensional knitted fabric, but also includes the configuration in which the non-woven fabric is laminated and integrated on both knitted fabrics of the three-dimensional knitted fabric.

[0020] The cushion body of the present invention has cushioning properties and durability due to the bending action of the connecting yarns of the three-dimensional knitted fabric, and the non-woven fabric exhibits not only cushioning properties but also good skin feel. In general, durable three-dimensional knitted fabrics have hard connecting yarns using monofilaments or relatively thick multifilaments arranged between the front and back ground knitted structures. Such hard connecting yarns often cause discomfort to the wearer because the knitted portion between the connecting yarns and the ground knitted structure comes into contact with the skin.

[0021] In contrast, in the present invention, since the non-woven fabric is laminated and integrated, when the cushion body is wound around an article, the non-woven fabric is arranged on the outer surface of the wound cushion body, which provides a soft and gentle contact feeling to the skin of a person colliding with the article, and the impact force of the collision can be absorbed by the cushioning property provided by the connecting yarns of the three-dimensional knitted fabric. Note that when a nonwoven fabric is laminated and integrated on both knitted fabrics of a three-dimensional knitted fabric, the cushioning property provided by the nonwoven fabric is increased compared to a case where the nonwoven fabric is laminated and integrated on one of the knitted fabrics.

[0022] In addition to the above, the connecting yarns of the three-dimensional knitted fabric connect the front and back knitted fabrics in an arcuately curved state. The connecting yarns in such a slightly curved state are easily elastically flexible when a load is applied to the three-dimensional knitted fabric. In this way, the three-dimensional knitted fabric can absorb loads and impacts through the flexibility of the connecting yarns. Furthermore, the laminated nonwoven fabric is more flexible than the three-dimensional knitted fabric.

[0023] At the rising portion of the connecting yarn, the connecting yarn turns back and stands up from the front or back ground knitted structure. That is, the connecting yarn does not rise perpendicularly to the front and back knitted fabrics, but rises in an oblique direction and is connected to the opposing knitted fabric, so generally, the connecting yarn is largely curved in an arch shape.

[0024] In a three-dimensional knitted fabric where a nonwoven fabric is not laminated and integrated, the connecting yarn is curved in an arch shape. Therefore, when a load perpendicular to the three-dimensional knitted fabric is generated, a lateral force acts on the front and back knitted fabrics at the rising portion of the connecting yarn due to the flexibility of the connecting yarn. As a result, the knitted fabrics shift in the lateral direction, the connecting yarn is further curved, and the entire three-dimensional knitted fabric tends to be easily crushed. Further, at the joint between the connecting yarn and the front and back knitted fabrics, the force in the vertical direction causes the connecting yarn to tend to protrude from the knitted fabric, which further makes the entire three-dimensional knitted fabric more easily crushed.

[0025] However, in the present invention, since the nonwoven fabric is laminated and integrated with the knitted fabric, part of the fibers of the nonwoven fabric are entangled with the knitted fabric to improve rigidity, so the ground knitted structure is less likely to shift in the lateral direction. Further, since the nonwoven fabric laminated and arranged on the knitted fabric is fused, the roots of the connecting yarn are consolidated and the rigidity is increased, which also makes the three-dimensional knitted fabric less likely to be crushed. Through these effects, the cushioning property of the entire three-dimensional knitted fabric can be improved.

[0026] As described above, the cushion body of the present invention, which has the action of nonwoven fabric and the action of connecting yarn, first causes the nonwoven fabric to flex and distribute the pressure on the person's skin when the cushion body is subjected to impact or load, and at the same time the connecting yarn of the three-dimensional knitted fabric flexes until the load is balanced. In this way, the combined action of the nonwoven fabric and connecting threads in their flexibility allows for effective absorption of shocks and loads.

[0027] As mentioned above, when a nonwoven fabric is curved in such a way that the inner surface shrinks significantly, the bending causes a portion of the inner surface to bend at an acute angle, resulting in an uneven arc. Therefore, simply laminating the nonwoven fabric and the knitted fabric without integrating them results in a portion of the inner surface of the nonwoven fabric in contact with the knitted fabric bending at an acute angle when curved.

[0028] When nonwoven fabric is bent in this way, if a person collides with an item wrapped in cushioning material and force is applied to the cushioning material, the bent corners of the nonwoven fabric will experience relatively greater pressure than other parts. In other words, the small area of ​​the corners will impose a large amount of pressure on the person colliding with it, preventing the cushioning material from fully performing its function. Furthermore, even when the cushioning material is used to protect an item, the presence of bent corners in the nonwoven fabric will impose a large amount of pressure on the item.

[0029] In the cushion body of the present invention, a three-dimensional knitted fabric and a nonwoven fabric are laminated and integrated. As a result, when the nonwoven fabric is curved, the inner surface tends to fold, but the knitted fabric on the side of the three-dimensional knitted fabric that is in contact with the nonwoven fabric tries to pull it back due to the elasticity of the stitches. Therefore, when the nonwoven cushion body is curved, the inner surface of the nonwoven fabric can be made into a smooth arc without bending.

[0030] As a result, when a person or other object collides with an item wrapped in cushioning material, a portion of the nonwoven fabric bends, preventing excessive pressure on the person who collides with it. Instead, it absorbs the impact by applying even and small pressure to the person or other object that collided with it.

[0031] Furthermore, in the present invention, both the knitted structure of the front side and the structure of the opposite side of the three-dimensional knitted fabric are configured to have greater elasticity in the planar direction than that of a nonwoven fabric, so that it can be smoothly wrapped around even articles with small curvature.

[0032] The limit of the elasticity (especially compressibility) of a nonwoven fabric can be said to be when the nonwoven fabric bends significantly and the inner surface of the bend tries to fold and bend. If the elasticity of the knitted fabric is less than that of the nonwoven fabric, the knitted fabric will lose its ability to stretch before the nonwoven fabric bends, preventing it from being curved further. Therefore, because it cannot be curved to a large degree, the objects that can be wrapped are limited to those with a slight curvature that is close to flat.

[0033] In the present invention, by making the stretchability in the planar direction greater than that of nonwoven fabric in both the front and back knitted structures of the three-dimensional knitted fabric, even articles with a large curvature that would cause nonwoven fabric to bend can be smoothly arranged along their surface, and as mentioned above, nonwoven fabric can also be smoothly curved without bending.

[0034] Furthermore, the opposite side of the nonwoven fabric layered in the three-dimensional knitted fabric can also form a knit structure that can engage with hook-and-loop fasteners. Hook-and-loop fasteners engage when the hook-shaped napped side and the loop-shaped napped side are pressed together. In this invention, the knit structure may be one in which the hook side of the hook-and-loop fastener engages, or it may be one in which the loop side engages.

[0035] By making the opposite side of the nonwoven fabric layered in the three-dimensional knitted fabric a knit structure that can engage with hook-and-loop fasteners, it can be easily secured to a protective object to which a separate hook-and-loop fastener is attached. In addition, other cushioning bodies to which separate hook-and-loop fasteners are attached can be layered on top of each other, allowing for adjustment of the thickness and cushioning properties of the cushioning bodies.

[0036] Furthermore, it is also possible to make the knitted fabric on the side to which the nonwoven fabric is bonded in the three-dimensional knitted fabric a knitted fabric without holes formed by the knitting structure. Knitted fabrics that have holes formed by the knitting structure are generally called "mesh" and are characterized by good breathability. However, in a mesh, at least two rows of chain mesh are joined together to form edges around the holes, and the spaces between the edges are holes. When such a mesh base structure is used in a cushion, the areas with holes do not come into contact with the nonwoven fabric, resulting in a smaller contact area between the nonwoven fabric and the three-dimensional knitted fabric. A smaller contact area reduces the bonding strength between the nonwoven fabric and the three-dimensional knitted fabric, making them more prone to peeling. In addition, strong forces are generated at the edges, pushing up the knitted sections of the connecting yarn and the base structure, making them more likely to come into contact with the skin through the nonwoven fabric.

[0037] In this invention, the contact area between the nonwoven fabric and the knitted fabric can be increased by making the knitted fabric on the side to which the nonwoven fabric is bonded in the three-dimensional knitted fabric a knitted fabric without holes formed by the knitting structure. When the contact area is increased, the bond between the nonwoven fabric and the knitted fabric becomes stronger, and the pressure resistance of the connecting yarn increases. Furthermore, the absence of holes allows the entire knitted fabric to bear the load, making it less likely for the connecting yarn and the knitted base fabric to be pushed up by the connecting yarn.

[0038] As yet another means, the present invention provides a configuration comprising a three-dimensional knitted fabric formed by connecting a front knitted fabric structure and a back knitted fabric structure with connecting yarn, and a nonwoven fabric laid on top of the three-dimensional knitted fabric, wherein the three-dimensional knitted fabric can be configured in which a first three-dimensional knitted fabric and a second three-dimensional knitted fabric having less elasticity in the thickness direction than the first three-dimensional knitted fabric are laminated and integrated.

[0039] In this configuration, the nonwoven fabric is laminated and integrated with the opposing side of the second three-dimensional knitted fabric in the first three-dimensional knitted fabric. In other words, the nonwoven fabric, the first three-dimensional knitted fabric, and the second three-dimensional knitted fabric are laminated in that order. Furthermore, both the front and back knitting structures of the first and second three-dimensional knitted fabrics are designed to be more stretchable than the nonwoven fabric. Furthermore, the aforementioned three-dimensional knitted fabric only needs to comprise at least a first three-dimensional knitted fabric and a second three-dimensional knitted fabric, and may also include fabrics comprising other three-dimensional knitted fabrics.

[0040] In the above configuration, a flexible nonwoven fabric is placed on the outermost surface of the cushion body, and a relatively low-elasticity three-dimensional knitted fabric and a highly-elastic three-dimensional knitted fabric are layered on top of this nonwoven fabric. With this layered configuration, when the cushion body is subjected to a load from the nonwoven fabric side, such as when a person collides with it, the first three-dimensional knitted fabric, which has relatively less elasticity, deforms significantly at first to distribute the pressure, and then the pressure gradually extends to the second three-dimensional knitted fabric, which has relatively more elasticity, and the firm elasticity of the second three-dimensional knitted fabric acts to absorb the load.

[0041] Due to the above effect, the increase in reaction force on a person colliding with the cushion is gradual, and the energy acting on the point of impact is reduced. Also, when an object collides with the cushion, the increase in reaction force on the object is gradual, and the energy acting on the object is reduced. Therefore, it is possible to prevent injuries to the person colliding and to prevent damage to the object that collides.

[0042] In the above configuration, it is also possible to further laminate and integrate the first nonwoven fabric on the opposing side of the second three-dimensional knitted fabric in the first three-dimensional knitted fabric, and to laminate and integrate the second nonwoven fabric between the first three-dimensional knitted fabric and the second three-dimensional knitted fabric. The above configuration only requires that it comprises at least the first nonwoven fabric and the second nonwoven fabric, and may also include configurations that further comprise other nonwoven fabrics.

[0043] In a configuration where the first and second three-dimensional knitted fabrics are laminated in direct contact, when force is applied in the thickness direction, the tips of the connecting threads, which provide high elasticity, may protrude from the front and back knitted fabrics, potentially worsening the feel against the skin. Therefore, by interposing a second nonwoven fabric between the first and second three-dimensional knitted fabrics, it is possible to prevent the connecting threads of the second three-dimensional knitted fabric from protruding, thereby improving the pressure resistance and durability of the connecting threads themselves.

[0044] Furthermore, since nonwoven fabrics generally have a denser surface with more densely packed fibers than the knitted fabrics on the front and back of the three-dimensional knitted fabric, the contact area between the second nonwoven fabric and the first three-dimensional knitted fabric, or between the second nonwoven fabric and the second three-dimensional knitted fabric, increases. When the contact area with the mesh structure on the front and back of the three-dimensional knitted fabric increases, the area for bonding becomes larger when the fabrics are laminated and integrated using various methods such as adhesives and glues, resulting in stronger bonding and improved pressure resistance and durability of the entire cushion. [Effects of the Invention]

[0045] In the cushion body of the present invention, a three-dimensional knitted fabric and a nonwoven fabric are laminated and integrated. Both the front and back knitted structures of the three-dimensional knitted fabric are made to be more stretchable than the nonwoven fabric. As a result, even when wrapped around a curved surface, the inner surface of the nonwoven fabric does not fold or bend, allowing for a smooth curve. The three-dimensional knit fabric provides excellent cushioning and durability, while the nonwoven fabric does not fold, preventing excessive pressure from being applied to specific parts of the body due to folds.

[0046] Due to the above-described action, the cushioning material of the present invention not only has excellent durability and cushioning properties, but also has the effect of smoothly curving along curved surfaces, even curved articles or curved parts of the body, to provide uniform cushioning. Furthermore, the cushion body of the present invention, which uses a nonwoven fabric with a dense surface, also has the effect of having high heat retention properties. [Brief explanation of the drawing]

[0047] [Figure 1] These are perspective views and cross-sectional views illustrating the cushion body of the present invention. [Figure 2] This is a schematic diagram representing the three-dimensional knitted fabric of the cushion body of the present invention. [Figure 3] This is a schematic diagram representing the nonwoven fabric of the cushioning material of the present invention. [Figure 4] This is an explanatory diagram illustrating the method of using the cushioning body of the present invention. [Figure 5] This is a schematic diagram illustrating how a non-integrated cushion material deforms when a load is applied to it. [Figure 6] This is a schematic diagram illustrating the deformation of the cushion body of the present invention when a load is applied to it. [Figure 7] This is an explanatory diagram showing a modified example 1 of the cushion body of the present invention. [Figure 8] This is an explanatory diagram showing a modified example 2 of the cushion body of the present invention. [Figure 9] A cross-sectional view showing a modified example 3 of the cushion body of the present invention. [Figure 10] A cross-sectional view showing a modified example 4 of the cushion body of the present invention. [Figure 11] A cross-sectional view showing a modified example 5 of the cushion body of the present invention. [Modes for carrying out the invention]

[0048] Embodiments for carrying out the present invention will be described below with reference to Figures 1 to 6. Note that the forms in each figure are schematic representations for illustrative purposes.

[0049] The cushion body 100 of the present invention is constructed by laminating and integrating a three-dimensional knitted fabric 1 and a nonwoven fabric 2 in the thickness direction, as shown in Figure 1, for example. First, the structure of the laminated integration of the three-dimensional knitted fabric 1 and the nonwoven fabric 2 will be explained. In the configuration shown in Figure 1, an adhesive 3 that melts and solidifies with heat is applied to the nonwoven fabric 2, and the three-dimensional knitted fabric 1 and the nonwoven fabric 2 are arranged in a laminated manner. Then, heat is applied to either the three-dimensional knitted fabric 1 or the nonwoven fabric 2 to integrate them. Various methods can be used to apply heat, such as an iron or a heat press, but it is preferable not to apply excessive force in order to avoid deforming the three-dimensional knitted fabric 1.

[0050] Various methods can be used to laminate and integrate the three-dimensional knitted fabric 1 and the nonwoven fabric 2, including using a heat-activated adhesive 3, using anaerobic or two-component adhesives, melting and solidifying some of the fibers of the three-dimensional knitted fabric 1 and the nonwoven fabric 2 to bond them together, using adhesive tape to bond them, and sewing.

[0051] Next, the three-dimensional knitted fabric 1 will be described. The three-dimensional knitted fabric 1 used in the cushion body in Figure 1 is constructed by connecting the front knitted structure 11 and the back knitted structure 12 with connecting yarns 13, 13…, as shown in Figure 2(a). Various yarn materials can be used for the front knitted structure 11 and the back knitted structure 12; for example, multifilament yarn made of polyester can be used. Furthermore, various yarn materials can be used for the connecting yarn 13; for example, monofilament yarn made of polyester can be used. Furthermore, monofilament yarn may be used for the front fabric structure 11 and the back fabric structure 12, and multifilament yarn may be used for the connecting yarn 13. Natural fibers can be used as well as synthetic fibers.

[0052] The three-dimensional knitted fabric 1 in the form shown in Figure 2 is knitted using a double raschel machine, and can, for example, have 18 stitches per inch or 22 stitches per inch, but is not limited to these.

[0053] As shown in Figure 2(b), the surface knitted structure 11 is the surface knitted structure on the side to which the nonwoven fabric 2 is laminated, and is made using polyester multifilament yarn to create a knitted fabric without holes formed by the knitting structure (a so-called plain structure). As mentioned above, the thickness and material of the yarn used for the surface knitted structure 11 can be selected as appropriate. On the other hand, the reverse side knitted structure 12 is a so-called mesh structure having holes formed by the knitting structure, as shown in Figure 2(c). In the form shown in Figure 2, it is a honeycomb mesh with continuous hexagons. The thickness and material of the yarn used for the reverse side knitted structure 12 can also be selected as appropriate.

[0054] As for the ground knit structure, both the front ground knit structure 11 and the back ground knit structure 12 may be plain, or both may be mesh structures. Furthermore, the structure may have any pattern formed, and the shape of the mesh holes can also be any shape. Preferably, the ground knit structure has sufficient elasticity in the wale direction, the course direction, or in either direction.

[0055] The connecting yarn 13 is knitted to connect the front fabric structure 11 and the back fabric structure 12, and is composed of monofilament yarn made of polyamide or polyester. The thickness of the monofilament yarn can be selected to any thickness, but if the connecting yarn 13 is thick, when the three-dimensional knitted fabric 1 is compressed in the thickness direction, the connecting yarn 13 may protrude, or the knitted portion between the connecting yarn 13 and the fabric may be pushed up by the connecting yarn 13 oriented in the thickness direction. As a result, the protruding connecting yarn 13 or the pushed-up knitted portion will come into strong contact with the skin via the nonwoven fabric 2, causing an unpleasant feel and pain.

[0056] In the case of chemical fibers such as polyamide and polyester commonly used for the connecting yarn 13, the aforementioned protrusion and pushing up tend to occur when the thickness exceeds 300 denier. Therefore, in order to prevent the connecting yarn 13 from protruding or the knitted portion between the connecting yarn 13 and the front fabric knitted structure 11 or back fabric knitted structure 12 from being pushed up by the connecting yarn 13 oriented in the thickness direction, it is preferable that the fineness of the connecting yarn 13 be 300 denier or less. More preferably, it is 200 denier or less, and even more preferably 150 denier or less. Furthermore, it is even more preferable to select a material that is flame-retardant or heat-resistant. Because the connecting yarn 13 is flexible, the knitted portion does not come into strong contact with the skin through the nonwoven fabric, thus reducing discomfort and pain.

[0057] The connecting yarn 13 is connected between the front fabric 11 and the back fabric 12 in a slightly curved state where the chain stitches are in the same position vertically. However, because the back fabric 12 is made of honeycomb mesh, the connecting yarn 13 is positioned at a large oblique angle at the edges of holes where the rows of chain stitches are offset (not shown).

[0058] As a result, the bow-shaped arrangement of the connecting threads 13 makes it difficult for the connecting threads 13 to collapse and be crushed in the thickness direction, while the diagonally arranged connecting threads 13 make it difficult for the entire three-dimensional knitted fabric 1 to collapse even when force is applied from a diagonal direction. In addition, the bow-shaped, diagonally curved connecting threads 13 bend like a spring when force is applied, exhibiting appropriate elasticity.

[0059] Next, we will explain nonwoven fabric 2. The nonwoven fabric 2 used in the cushion in Figure 1 is formed into a cloth-like material without weaving or knitting short fibers 21, 21… as shown in Figure 3. Natural fibers or synthetic fibers can be used as the short fibers 21, 21…, and in the form shown in Figure 3, polyester fibers are used considering texture and durability. Other materials such as cellulose fibers and polyolefin fibers can also be used.

[0060] Nonwoven fabric 2 can be manufactured using various methods, including thermal bonding, which melts and bonds the short fibers 21, 21... with heat; chemical bonding, which uses adhesives; and spunlace bonding. When using thermal bonding, thermoplastic resin can be used for the fibers, allowing the short fibers 21, 21... to be bonded together without the use of adhesives. Furthermore, if a nonwoven fabric 2 with densely packed fibers and high airtightness is used, it is possible to make it lightweight while also improving heat retention.

[0061] The thickness of the nonwoven fabric 2 can be selected as appropriate, but it is preferable that it be thinner than the three-dimensional knitted fabric 1, so that the curvature of the inner surface does not increase when curved, and it can smoothly conform to even small curvature objects. Furthermore, it is even more preferable that it be 3 mm or less, regardless of the thickness of the three-dimensional knitted fabric 1.

[0062] Next, the method of using the cushion body 100 with the above configuration will be explained. The cushion body 100 is used by wrapping it around an item 4 that could potentially cause injury through collisions, for example, in a place where children play. Examples include tables as shown in Figure 4(a), as well as the legs and pillars of playground equipment. Note that the cushion body 100 is wrapped around any protruding parts of the item 4. The beginning and end of the winding can be secured in various ways; for example, the nonwoven fabric 2 at the beginning of the winding and the three-dimensional knitted fabric 1 at the end of the winding can be bonded and secured with double-sided tape.

[0063] When used by wrapping it around article 4, the three-dimensional knitted fabric 1 of the cushion body 100 is positioned on the side facing article 4, and the nonwoven fabric 2 is positioned on the outside. In other words, the side of the nonwoven fabric 2 that is not in contact with the three-dimensional knitted fabric 1 (the outermost surface) is curved in the direction of stretching, and the surface knit structure 11 of the three-dimensional knitted fabric 1 (the side in contact with article 4) is curved in the direction of shrinking.

[0064] In this case, if the curvature of the cushion body 100 is such that the neutral surface (the surface that neither stretches nor shrinks) in the curve is closer to the three-dimensional knitted fabric 1, then both sides of the nonwoven fabric 2 and the back side knitted structure 12 of the three-dimensional knitted fabric 1 (the side in contact with the nonwoven fabric 2) will stretch, while the front side knitted structure 11 (the side in contact with the article 4) will shrink. On the other hand, if the curvature of the neutral plane is such that it is closer to the nonwoven fabric 2, the side of the nonwoven fabric 2 that is not in contact with the three-dimensional knitted fabric 1 (the outermost side) will stretch, but the side of the nonwoven fabric 2 that is in contact with the three-dimensional knitted fabric 1 and the knitted fabrics on both sides of the three-dimensional knitted fabric 1 will shrink.

[0065] Regarding the curvature of the cushion body 100, when the neutral surface is closer to the three-dimensional knitted fabric 1, the nonwoven fabric 2 and the back side knitted structure 12 of the three-dimensional knitted fabric 1 (the side in contact with the nonwoven fabric 2) will stretch, so a part of the surface of the nonwoven fabric 2 will not bend in the first place. However, if the neutral plane is closer to the nonwoven fabric 2 side, the side of the nonwoven fabric 2 that is in contact with the three-dimensional knitted fabric 1 and the back side knitted structure 12 of the three-dimensional knitted fabric 1 will shrink.

[0066] When the side of the nonwoven fabric 2 that is in contact with the three-dimensional knitted fabric 1 and the back side knitted structure 12 of the three-dimensional knitted fabric 1 are curved in a way that causes them to shrink, if the curvature is large, a part of the surface of the nonwoven fabric 2 will bend and create a bent portion, as shown in Figure 4(b). In contrast, in the cushion body 100 of the present invention, the three-dimensional knitted fabric 1 and the nonwoven fabric 2 are laminated and integrated, and furthermore, the elasticity of the three-dimensional knitted fabric 1 is equal to or greater than that of the nonwoven fabric 2. Therefore, even when the curvature is large, the back knitted structure 12 of the three-dimensional knitted fabric 1 shrinks considerably and becomes a smooth curved surface, while the nonwoven fabric 2, which tends to fold, is pulled back by the elasticity of the adhesively integrated back knitted structure 12 and the elasticity of the connecting yarn 13. As a result, as shown in Figure 4(c), it can be curved with a smooth curved surface similar to the back knitted structure 12 without folding.

[0067] As described above, the way in which the nonwoven fabric 2 is smoothly wrapped around the curved surface of the article 4 without bending is explained with reference to Figures 5 and 6, comparing it to the case where the three-dimensional knitted fabric 1 and the nonwoven fabric 2 are not integrated.

[0068] Figure 5 schematically illustrates the deformation of a cushion body 200, which is made by laminating a three-dimensional knitted fabric 1 and a nonwoven fabric 2, but which are not integrated and remain separate, when a vertical load P is applied. As shown in Figure 5(a), when the three-dimensional knitted fabric 1 and the nonwoven fabric 2 are laminated without being integrated, when the nonwoven fabric 2 is curved and wrapped around the curved surface of the article 4, a portion of the inner surface of the nonwoven fabric 2 (the surface in contact with the three-dimensional knitted fabric 1) will not be compressed completely and will fold, resulting in a state with multiple bent sections.

[0069] When a load P is applied in the thickness direction of the separated cushion body 200 while the nonwoven fabric 2 has multiple bends, the nonwoven fabric 2 and the three-dimensional knitted fabric 1 will bend, as shown in Figure 5(b). Then, as shown in Figure 5(c), the object comes to rest when the reaction force R and the load P are in equilibrium. In the figure, the vertical hatching represents the distribution of the reaction force R. At this point, the sum of the reaction forces R across the entire load-bearing surface is equal to the load P. The connecting yarns 13 of the three-dimensional knitted fabric 1 positioned on the inside flex and absorb a portion of the load P, allowing the nonwoven fabric 2 positioned on the outside to maintain its cushioning properties without being completely compressed and crushed.

[0070] However, in some cases, at the bent corners of the nonwoven fabric 2, the nonwoven fabric 2 is already compressed due to the bend, and the elastically deformable thickness is relatively reduced. Therefore, under a given load P, the parts that are not bent maintain their cushioning properties without being completely compressed and crushed, but the bent parts are completely compressed and crushed. As a result, the local reaction force R at the bent, sharp corners increases. Consequently, the separated cushion body 200 comes into strong contact with the skin of a person who collides with it.

[0071] On the other hand, as shown in Figure 6(a), when the three-dimensional knitted fabric 1 and the nonwoven fabric 2 are laminated and integrated, and the nonwoven fabric 2 is wrapped so that it forms a smooth curved surface, and a load is applied in the thickness direction of the cushion body 100, as shown in Figure 6(b), the connecting yarn 13 of the nonwoven fabric 2 and the three-dimensional knitted fabric 1 bends, and a reaction force is generated by the nonwoven fabric 2 and the three-dimensional knitted fabric 1. Then, as shown in Figure 6(c), it comes to rest when the reaction force and the load are balanced. At this time, similar to the configuration in Figure 5, the sum of the loads and the sum of the reaction forces on the entire surface under load are equal. The connecting yarns 13 of the three-dimensional knitted fabric 1 placed on the inside bend and absorb part of the load, so that the nonwoven fabric 2 placed on the outside can maintain its cushioning properties without being completely compressed and crushed.

[0072] In the configuration shown in Figure 5, the nonwoven fabric 2 was bent, resulting in areas where the reaction force R increased locally. In contrast, in the configuration shown in Figure 6, the nonwoven fabric 2 is not bent, resulting in a smooth reaction force distribution across the entire surface receiving the load P, and there are no areas where the reaction force R is locally large. As a result, there are no parts of the cushion body 100 that come into strong contact with the skin of the person who collides with it, allowing it to exhibit uniform cushioning. Furthermore, when the cushion body 100 is subjected to impact or load, as described above, the cooperative action of the bending of the nonwoven fabric 2 and the connecting threads 13 prevents the connecting threads 13 from bending and buckling, allowing the cushion body 100 to effectively absorb the impact or load.

[0073] "Differentiation Example 1" The present invention is not limited to the embodiments described above, and other forms may be adopted. For example, as shown in Figure 7, both the front knit structure 11 and the back knit structure 12 of the three-dimensional knitted fabric 1 in the cushion body 101 can be a mesh structure. In this modified example, the yarn material and the material and bonding state of the nonwoven fabric 2 of the three-dimensional knitted fabric 1 are the same as in the embodiment of Figure 1, but the structure of the three-dimensional knitted fabric 1 is different.

[0074] In this modified example, the front fabric knitting structure 11 and the back fabric knitting structure 12 are knitted in such a way that hexagonal openings and square openings are arranged alternately, and the hexagonal openings of the front fabric knitting structure 11 and the square openings of the back fabric knitting structure 12 are positioned opposite each other.

[0075] To elaborate on the knit structure, as shown in Figure 7, when viewed from a plan with the wale direction as the transverse and the course direction as the longitudinal, each parallel side in the hexagonal opening is composed of two rows of chain stitches, which are arranged in the wale direction. Therefore, the hexagonal openings are arranged continuously in the wale direction, sharing two parallel sides.

[0076] On the other hand, the quadrilateral openings are positioned at a 45-degree angle, connecting the vertices in the course direction of the hexagonal openings with the endpoints of each parallel side of the hexagonal openings. In other words, the quadrilateral openings are positioned at a 45-degree angle, and are continuously arranged in the wale direction, sharing one of their vertices with the vertices of adjacent quadrilaterals.

[0077] The connecting yarns 13, 13… are knitted so that they have portions that are connected approximately perpendicularly and portions that are connected diagonally between the front side knitted structure 11 and the back side knitted structure 12. More specifically, the connecting yarns 13, 13… are arranged approximately perpendicularly between the vertices of the square opening and the two parallel sides of the hexagon opening. On the other hand, the connecting yarns 13, 13… are arranged diagonally between each side of the square opening and each side of the hexagon opening.

[0078] In the configuration shown in Figure 7, when the three-dimensional knitted fabric 1 is pulled in the direction of the course, the hexagonal and square openings deform and collapse, resulting in a significant stretch. On the other hand, when pulled in the wale direction, the rectangular opening deforms by collapsing, but the hexagonal opening elongates relatively little because the two parallel sides act as support, suppressing the deformation of the hexagon.

[0079] Thus, by using the three-dimensional knitted fabric 1 of this modified example, it can be greatly stretched in the direction of the course, allowing it to be smoothly wrapped around even items 4 with greater curvature.

[0080] Furthermore, in the configuration shown in Figure 7, it is also possible to laminate and integrate nonwoven fabrics 2, 2, ... on both sides of the front knitted fabric structure 11 and the back knitted fabric structure 12 of the three-dimensional knitted fabric 1 (not shown). The three-dimensional knitted fabric 1 in the form shown in Figure 7 has relatively large hexagonal and square openings. When nonwoven fabrics 2-2 are laminated on both sides of this three-dimensional knitted fabric 1, the bonding process of the nonwoven fabrics 2-2 causes them to flex at the hexagonal and square openings, and the nonwoven fabrics 2-2 come into contact with each other in some areas.

[0081] Where the nonwoven fabrics 2 and 2 come into contact with each other, the nonwoven fabrics, whose fibers are prone to entanglement, are firmly bonded together and become one. In other words, at the opening, the nonwoven fabrics 2 and 2 are bonded to each other, while in areas other than the opening, the front fabric knit structure 11 or the back fabric knit structure 12 is bonded to the nonwoven fabric 2 and 2. Thus, by having not only adhesive portions between the knitted surface fabric 11 and the knitted surface fabric 12 and the nonwoven fabric 2, but also portions where the nonwoven fabrics 2 and 2 are bonded to each other, the adhesive strength between the three-dimensional knitted fabric 1 and the nonwoven fabric 2 can be improved, and the overall rigidity of the cushion body 101 is improved, resulting in a more stable shape.

[0082] Furthermore, when the nonwoven fabrics 2-2 are bonded together at the opening, the shape of the opening can be various shapes other than the hexagonal and square shapes shown in Figure 7. Regardless of the shape, as long as the nonwoven fabrics 2-2 are in contact and tightly bonded together at the opening, the thickness of the nonwoven fabric and the size of the opening can be selected as appropriate.

[0083] "Differentiation Example 2" The present invention may employ other embodiments as well. For example, as shown in Figure 8, it is also possible to create a cushion body 102 in which the three-dimensional knitted fabric 1, as configured in Figure 1, is positioned at a 45-degree angle. In this modified example, the yarn material and structure of the three-dimensional knitted fabric 1, and the material and bonding state of the nonwoven fabric 2 are the same as in the embodiment of Figure 1, but the inclination of the three-dimensional knitted fabric 1 is different.

[0084] Double raschel knitted fabrics, whether solid or mesh, possess a certain degree of elasticity. However, the degree of elasticity generally differs between the course direction and the wale direction. In this modified example, the course direction (or wale direction) of the three-dimensional knitted fabric 1 is positioned at a 45-degree angle to the outer shape of the cushion body 102 (connecting yarns 13, 13... are omitted).

[0085] By arranging them diagonally in this way, the same degree of stretching can be achieved whether the cushion body 102 is wrapped horizontally or vertically around the outer shape of the cushion body 102. Therefore, during the wrapping process, it is not necessary to determine the orientation of the cushion body 102, which improves work efficiency.

[0086] "Differentiation Example 3" The present invention may employ other embodiments as well. For example, as shown in Figure 9, the three-dimensional knitted fabric 1 with the configuration of Figure 1 can be transformed into a cushion body 103 with a structure in which a first three-dimensional knitted fabric, which is a low-elasticity three-dimensional knitted fabric 10 (hereinafter referred to as "low-elastic three-dimensional knitted fabric"), and a second three-dimensional knitted fabric, which is a high-elasticity three-dimensional knitted fabric 20 (hereinafter referred to as "high-elastic three-dimensional knitted fabric"), are laminated and integrated.

[0087] In this modified example, a nonwoven fabric 2 is laminated and integrated into the opposite side of the high-elasticity three-dimensional knitted fabric 20 in the low-elasticity three-dimensional knitted fabric 10. Furthermore, in this modified example, both the front knit structure 101 and the back knit structure 102 in the low-elasticity three-dimensional knitted fabric 10, and the front knit structure 201 and the back knit structure 202 in the high-elasticity three-dimensional knitted fabric 20, are made to be more stretchable than the nonwoven fabric 2.

[0088] In the configuration shown in Figure 9, the connecting yarn 103 of the low-elasticity three-dimensional knitted fabric 10 is knitted so that its fineness is lower and the number of threads is fewer than that of the connecting yarn 203 of the high-elasticity three-dimensional knitted fabric 20. By adjusting the material and structure of the connecting yarns 103 and 203 in this way, the elasticity in the thickness direction can be adjusted as needed. In this modified example, the three-layer structure is created in which the three-dimensional knitted fabric on the side to which the nonwoven fabric 2 is laminated is configured to have low elasticity, and the high-elasticity three-dimensional knitted fabric 20, which has higher elasticity, is laminated and integrated into the low-elasticity three-dimensional knitted fabric.

[0089] With this layer configuration, for example, when the cushion body 103 is wrapped around an item as shown in Figure 4, if a person collides with the cushion body 103 and receives a load from the nonwoven fabric 2 side, initially the nonwoven fabric 2 and the low-elasticity three-dimensional knitted fabric 10 deform significantly to distribute the pressure, and then the high-elasticity three-dimensional knitted fabric 20 deforms, gradually acting to firmly absorb the load with its elasticity.

[0090] This effect slows down the increase in reaction force on a person who collides with the cushion 103, reducing the energy acting on the impact site. As a result, injuries to the person who collides can be prevented.

[0091] "Differentiation Example 4" In the above modified example, as shown in Figure 10, a cushion body 104 can also be formed by laminating and integrating a first nonwoven fabric 30 on the opposite side of the high elasticity three-dimensional knitted fabric 20 in the low elasticity three-dimensional knitted fabric 10, and laminating and integrating a second nonwoven fabric 40 between the low elasticity three-dimensional knitted fabric 10 and the high elasticity three-dimensional knitted fabric 20.

[0092] In this case, the second nonwoven fabric 40 only needs to have a thickness sufficient to prevent the connecting yarns 203 of the highly elastic three-dimensional knitted fabric 20 from sticking out when force is applied in the thickness direction of the cushion body 104. By making the nonwoven fabric of a necessary and sufficient thickness, it is possible to prevent it from becoming excessively thick and difficult to bend, and it becomes easier to bend smoothly to conform to a curved surface. By interposing a second nonwoven fabric 40 between the low-elasticity three-dimensional knitted fabric 10 and the high-elasticity three-dimensional knitted fabric 20, it is possible to prevent the connecting yarns 203 of the highly elastic three-dimensional knitted fabric 20 from coming loose, and the stability of the connecting yarns 203 is improved.

[0093] Furthermore, since nonwoven fabrics generally have a denser surface than the knitted fabrics on the front and back of a three-dimensional knitted fabric, the contact area between the second nonwoven fabric 40 and the highly elastic three-dimensional knitted fabric 20, or between the second nonwoven fabric 40 and the less elastic three-dimensional knitted fabric 10, increases. Therefore, for example, when laminating and integrating with a heat adhesive, the adhesive can be applied without gaps between the second nonwoven fabric 40 and the less elastic three-dimensional knitted fabric 10 and the highly elastic three-dimensional knitted fabric 20, resulting in increased strength after bonding.

[0094] Variation 5 In the present invention, as shown in Figure 11, the three-dimensional knitted fabric 1 is further composed of a surface knitted structure 11 and a pile structure 15 formed in a loop shape in the thickness direction. In this modified example, a nonwoven fabric 2 is laminated to the surface knitted structure 11 of the three-dimensional knitted fabric 1, and the pile structure 15 is configured as a knitted structure to which a hook-and-loop fastener 300 can engage. To elaborate on the knitted structure to which the hook-and-loop fastener 300 can engage, in this modified example, the knitted structure of the pile structure 15 can be such that it forms loops 14-14 whose size and spacing are adjusted to engage with the hook side 310 of the hook-and-loop fastener 300. For example, by adjusting the spacing to an integer multiple of the hook pitch of the hook-and-loop fastener 300, a secure engagement can be achieved.

[0095] In addition to the above, the pile yarn 15 can also be knitted in such a way that it engages with the loop side 320 of the hook-and-loop fastener 300. In this case, one possible method is to cut off a portion of the loops 14, 14 protruding from the pile yarn 15 to form a hook shape (not shown).

[0096] In this modified example, as described above, the pile yarn 15 is configured as a knitted structure that can engage with the hook-and-loop fastener 300, making it easy to secure to objects to be protected, such as the legs of a desk to which a separate hook-and-loop fastener is attached. Furthermore, by pressing the hook-and-loop fasteners together against other cushioning bodies to which hook-and-loop fasteners are attached, the thickness and cushioning properties can be easily adjusted by layering them.

[0097] In this invention, loops 14-14 are formed in the pile structure 15 of one of the cushion bodies, and a portion of the loops 14-14 protruding from the pile structure 15 of the other cushion body is cut to form a hook shape. This allows the pile structures 15-15 themselves to function as hook-and-loop fasteners, enabling them to engage and be laminated without the need for separate hook-and-loop fasteners 300.

[0098] Furthermore, in addition to the form shown in Figure 11, loops 14-14 can also be formed by constructing the three-dimensional knitted fabric 1 from a front knitted structure 11, a back knitted structure 12, and a connecting yarn 13, with the connecting yarn 13 protruding from the surface of the back knitted structure 102, or by forming the loops by protruding the yarn in a loop shape without creating a knitted structure in a part of the back knitted structure 12 (not shown).

[0099] In addition to the uses described above, the present invention can also be used by attaching it to the inside of clothing such as trousers. In this case, it is preferable to place the nonwoven fabric on the side that comes into contact with the skin, as this improves the feel against the skin. In this case, if the knitted fabric and the nonwoven fabric are not integrated and remain separate, they will easily shift due to gravity and body movements. However, because the knitted fabric and the nonwoven fabric are laminated and integrated, the connecting yarn 13 will not collapse, and they will be able to follow body movements such as bending without shifting relative to each other.

[0100] Furthermore, since the nonwoven fabric is placed on the inside of the curved section, it is preferable to make the nonwoven fabric thin in order to prevent the inner surface of the nonwoven fabric from being compressed and folding during the curve. On the other hand, to improve heat retention, it is preferable to select a material with dense fibers and high airtightness.

[0101] In addition to the above, the present invention also allows for the use of woven fabrics having similar physical properties to nonwoven fabrics in part. Furthermore, the cushion material of the present invention can be used in a variety of applications, such as hats and helmets, bra pads, protective materials attached to the corners of desks and chair legs, seat cushions and cushions, chair cushions, pillows, curtains, wall cushions, floor cushions, stair cushions, reclining bed pads, heat-retaining sheets for agricultural greenhouses, outdoor mats and tent materials, sports and medical supporters, heat-retaining cushioning materials, sleeping bags, shoe insoles and outer coverings, seat materials for bicycles, motorcycles, automobiles and ships, and base fabrics for embroidery. [Explanation of symbols]

[0102] 100, 101, 102, 103, 104, 105 Cushion body 1. Three-dimensional knitted fabric 11 Front ground knitting structure 12 Back side knitting structure 13 Connecting threads 14 loops 15 Pile tissue 2 Nonwoven fabric 21 short fibers 3. Adhesive 4 Goods 10 Low-elasticity three-dimensional knitted fabric 101 Front ground knitting structure 102 Back side ground knitting structure 103 Connecting thread 20 High-elasticity three-dimensional knitted fabric 201 Front ground knitting structure 202 Back side ground knitting structure 203 Connecting thread 30 First nonwoven fabric 40 Second nonwoven fabric 200 Separated cushion bodies 300 hook-and-loop fasteners 310 Hook side 320 Loop side

Claims

1. The system comprises a three-dimensional knitted fabric and a nonwoven fabric that is laminated and arranged on the three-dimensional knitted fabric, The aforementioned three-dimensional knitted fabric is constructed by connecting the front side knitted structure and the back side knitted structure with connecting yarn. The three-dimensional knitted fabric and the nonwoven fabric are laminated and integrated in the thickness direction. In the aforementioned three-dimensional knitted fabric, both the knitted structure of the front side and the structure of the opposite side have greater elasticity in the planar direction than the aforementioned nonwoven fabric. The cushion body is characterized in that the three-dimensional knitted fabric and the nonwoven fabric are laminated and integrated in such a way that when the surface in contact between the three-dimensional knitted fabric and the nonwoven fabric is curved in such a way that the nonwoven fabric tends to fold, but is pulled back by the elasticity of the knitted structure of the three-dimensional knitted fabric and the elasticity of the connecting yarn, thereby enabling the nonwoven fabric to bend with a smooth curved surface without folding.

2. The cushion body according to claim 1, characterized in that the surface opposite to the surface on which the nonwoven fabric is laminated in the three-dimensional knitted fabric has a knitted structure on which a hook-and-loop fastener can be engaged.

3. The cushion body according to claim 1 or 2, characterized in that the knitted fabric on the side to which the nonwoven fabric is bonded in the three-dimensional knitted fabric does not have holes formed by the knitting structure.

4. The three-dimensional knitted fabric comprises a front knitted structure and a back knitted structure connected by connecting yarns, and a nonwoven fabric laid on top of the three-dimensional knitted fabric. The aforementioned three-dimensional knitted fabric is formed by laminating and integrating a first three-dimensional knitted fabric and a second three-dimensional knitted fabric having higher elasticity in the thickness direction than the first three-dimensional knitted fabric. The nonwoven fabric is laminated and integrated into the opposing side of the second three-dimensional knitted fabric in the first three-dimensional knitted fabric. A cushion body characterized in that, in both the front and back knitted structures of the first and second three-dimensional knitted fabrics, the stretchability in the planar direction is greater than that of the nonwoven fabric.

5. The first nonwoven fabric is laminated and integrated with the opposing side of the second three-dimensional knitted fabric in the first three-dimensional knitted fabric. The cushion body according to claim 4, characterized in that a second nonwoven fabric is laminated and integrated between the first three-dimensional knitted fabric and the second three-dimensional knitted fabric.

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