Cushioning 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 cushioning body that is to be wrapped around an article in order to protect the article by dispersing pressure caused by a load or to protect the body from impact. [Background technology]

[0002] Nonwoven fabrics are fabrics made by bonding natural or synthetic fibers with adhesives or the fusion power of the fibers themselves. Nonwoven fabrics are not made by weaving, knitting, or papermaking, but by mechanically, chemically, or thermally intertwining the fibers, so the fibers are loosely bonded together, making them soft and easy to bend. In addition, most of the fibers are oriented in a flat direction, so there is little discomfort from the fibers pricking the fabric when touched. In addition, they have a moderate resilience, making them widely used as cushioning materials.

[0003] However, since nonwoven fabrics maintain their shape through entangled fibers, the gaps between the entangled fibers gradually decrease when the fabric is subjected to repeated or continuous loads in the thickness direction. Therefore, a cushion made only of nonwoven fabrics has a problem in that the resilience decreases with use, causing it to lose its function as a cushion.

[0004] Therefore, in the past, cushioning bodies have been developed that combine a nonwoven fabric that is pleasant to the touch and has appropriate elasticity and deflection (hereinafter referred to as "cushioning properties") with a three-dimensional knitted fabric that can maintain its cushioning properties even when subjected to repeated loads. For example, Patent Document 1 discloses a technology for a mat intended to prevent bedsores, which is constructed by bonding a three-dimensional knitted fabric and a nonwoven fabric serving as a water-absorbing, quick-drying fabric.

[0005] According to the technology of Patent Document 1, the moisture-absorbing and quick-drying fabric (nonwoven fabric) can quickly absorb and diffuse moisture such as sweat, so that the humidity can always be kept low, and the three-dimensional knitted fabric distributes the body weight so that no localized high pressure is created, making it less likely to cause bedsores.

[0006] Furthermore, Patent Document 2 discloses a technology for a brassiere pad that does not deteriorate through washing, feels good against the skin, and has high restoring ability even if part of it is dented.

[0007] The brassiere pad of Patent Document 2 has a surface layer and an inner layer placed on the skin side. The surface layer is a three-dimensional knitted fabric, and is composed of a front stitch layer, a back stitch layer, and connecting yarns that three-dimensionally connect them. The inner layer is composed of a nonwoven fabric. Then, a thermal adhesive is applied between the surface layer and the inner layer, and after they are overlapped, they are thermally compressed and molded into a cup shape by pressing to form a brassiere pad.

[0008] According to the technology of Patent Document 2, unlike conventional brassiere pads made only of nonwoven fabric, the inner layer, which is the inner part closest to the skin, uses a nonwoven fabric that is soft against the skin, and the surface layer uses a thermoformable synthetic fiber knit with a double-knit layer structure. This structure not only provides the bust shape retention function and a soft feel against the skin, but also has the ability to restore to its original cup shape even if some force is applied to the cup-shaped part during storage, without remaining depressed. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Japanese Patent Application Publication No. 9-70339 [Patent Document 2] JP 2000-226704 A Summary of the Invention [Problem to be solved by the invention]

[0010] However, if a nonwoven fabric is completely crushed in the thickness direction by a load or impact, the force is directly transmitted through the crushed nonwoven fabric, and the function as a cushion is lost. Therefore, when using a nonwoven fabric as a cushion material, it is necessary to use a nonwoven fabric that is thick enough not to be completely crushed by a load or impact. When a thick nonwoven fabric is curved and wrapped around an article or attached to clothing, the outer surface of the curved nonwoven fabric is stretched and the inner surface is contracted. In nonwoven fabrics, the fibers are entangled and loosely bonded to each other, so there are gaps between the fibers. The fibers of nonwoven fabrics can elastically deform in the gaps, so they have a certain degree of stretchability.

[0011] However, as mentioned above, when a thick nonwoven fabric is curved so that the inner surface of the nonwoven fabric shrinks significantly, the inner surface of the nonwoven fabric does not shrink completely and ends up being folded over, causing a part of the inner surface to bend at an acute angle, preventing it from forming a smooth arc and making it impossible to fit the curved surface of an article or the body. This causes a problem that the elasticity of the nonwoven fabric decreases at the bent portion, making it impossible to exhibit sufficient cushioning properties.

[0012] When considering the prior art in the case of wrapping the mattress around something, the technology in Patent Document 1 is a mattress for a bed that is placed on the bed for use, and therefore is not thought to be intended for use in a curved state. Therefore, although the construction combines a nonwoven fabric and a three-dimensional knitted fabric, it is mentioned that the nonwoven fabric must be moisture-absorbent and quick-drying, and that the three-dimensional knitted fabric must be pressure-dispersive, but there is no mention of the elasticity of the nonwoven fabric, or the elasticity of the knitted structure on the front and back sides of the three-dimensional knitted fabric, or the flexure of the connecting yarns.

[0013] On the other hand, Patent Document 2 discloses a technique for integrating a three-dimensional knitted fabric and a nonwoven fabric by bending them into a cup shape. However, the brassiere pad in Patent Document 2 is not formed by wrapping, but is formed by applying high heat and pressure through hot press molding using a mold.

[0014] In order to improve the wearing comfort, a thick nonwoven fabric is generally placed on the inside of the curve, which is the side closest to the skin, but as mentioned above, this causes the inside surface of the curve to shrink significantly. However, even if the nonwoven fabric is thick and does not easily form a smooth curved surface when bent, the pressure applied during molding will cause the fabric to be molded into a smooth curved surface that conforms to the shape of the mold.

[0015] Thus, in the technology of Patent Document 2, the nonwoven fabric is arranged on the inside of the curve, but molding with a mold is a prerequisite. Therefore, it can be said that there is little need to closely consider the stretchability of the nonwoven fabric, the stretchability of the knitted structure on the front and back sides of the three-dimensional knitted fabric, and the bending of the connecting yarn.

[0016] As described above, in the past, no consideration had been given to cushioning bodies that can be wrapped around objects or attached to clothing and that can be smoothly curved to fit the surface of the object to be protected.

[0017] The present invention has been made in consideration of the above-mentioned problems, and has as its object to provide a cushion body that is not only excellent in durability and cushioning properties, but also capable of smoothly curving along the curved surfaces of curved objects or curved parts of the body, thereby exhibiting uniform cushioning properties and heat retention properties. [Means for solving the problem]

[0018] The means adopted by the present inventors to solve the above problems will be described below. The present invention includes a three-dimensional knitted fabric and a nonwoven fabric laminated on the three-dimensional knitted fabric. The three-dimensional knitted fabric is configured by connecting a front ground knit structure and a back ground knit structure with a connecting yarn, or is configured by a front ground knit structure and a pile structure. The three-dimensional knitted fabric and the nonwoven fabric are laminated and integrated in the thickness direction. Furthermore, the present invention is characterized in that the three-dimensional knitted fabric has a greater stretchability in the surface direction in both the front ground knit structure and the back ground knit structure than the nonwoven fabric.

[0019] In laminating and integrating a three-dimensional knitted fabric and a nonwoven fabric, the three-dimensional knitted fabric and the nonwoven fabric are integrated to the extent that they bend together when the cushion body is bent, so long as they are integrated to the extent that they bend together. Furthermore, the present invention is not limited to a configuration in which a nonwoven fabric is laminated integrally to one of the three-dimensional knitted fabrics, but also includes a configuration in which a nonwoven fabric is laminated integrally to both of the three-dimensional knitted fabrics.

[0020] The cushion body of the present invention has cushioning properties and durability due to the flexing action of the connecting yarns of the three-dimensional knitted fabric, and the nonwoven fabric exhibits not only cushioning properties but also a pleasant feel against the skin. In a three-dimensional knitted fabric having good durability, a hard connecting yarn made of a monofilament or a relatively thick multifilament is generally arranged between the front and back ground knitted structures. This hard connecting yarn often causes discomfort to the wearer when the knitted portion between the connecting yarn and the ground knitted structure comes into contact with the skin.

[0021] In contrast, in the present invention, the nonwoven fabric is laminated and integrated, so that when the cushion body is wrapped around an article, the nonwoven fabric is placed on the outer surface of the wrap, so that the nonwoven fabric provides a soft and gentle contact feeling to the skin of a person who hits the article, and the cushioning properties of the connecting yarns of the three-dimensional knitted fabric can absorb the force of the collision. When nonwoven fabric is laminated integrally onto both knitted fabrics of a three-dimensional knitted fabric, the cushioning effect provided by the nonwoven fabric is increased compared to when the nonwoven fabric is laminated integrally onto one of the knitted fabrics.

[0022] In addition to the above, the connecting threads of the three-dimensional knitted fabric connect the front and back knitted fabrics in a bow-like curved state. Such a slightly curved connecting thread is easy to bend elastically when a load is applied to the three-dimensional knitted fabric. In this way, the three-dimensional knitted fabric can absorb loads and impacts by utilizing the bending of the connecting threads. Moreover, the laminated nonwoven fabric is even easier to bend than the three-dimensional knitted fabric.

[0023] In the rising portion of the connecting yarn, the connecting yarn turns back and stands from the front ground knit structure or the back ground knit structure. In other words, the connecting yarn does not rise perpendicularly to the front and back knit fabrics, but rises in an oblique direction and is connected to the opposing knit fabric, so that the connecting yarn generally curves greatly like an arch.

[0024] In a three-dimensional knitted fabric in which nonwoven fabrics are not laminated and integrated, the connecting yarns are curved like an arch, so when a load perpendicular to the three-dimensional knitted fabric is applied, the connecting yarns bend and a lateral force acts on the front and back knitted fabrics at the rising part of the connecting yarns. This causes the knitted fabric to shift laterally, the connecting yarns to bend even more, and the three-dimensional knitted fabric as a whole becomes more likely to collapse. Furthermore, at the joining portion between the connecting yarn and the front and back knitted fabrics, the connecting yarn tends to jump out of the knitted fabric due to a perpendicular force, making the three-dimensional knitted fabric as a whole even more prone to collapse.

[0025] However, in the present invention, since the nonwoven fabric is laminated and integrated with the knitted fabric, some of the fibers of the nonwoven fabric are entangled with the knitted fabric to improve rigidity, so that the ground knit structure is less likely to shift laterally. In addition, since the nonwoven fabric layered on the knitted fabric is fused, the bases of the connecting yarns are hardened and the rigidity is increased, which also makes the three-dimensional knitted fabric less likely to be crushed. These actions can improve the cushioning properties of the three-dimensional knitted fabric as a whole.

[0026] As described above, the cushion body of the present invention, which has the action of the nonwoven fabric and the action of the connecting thread, when the cushion body receives an impact or load, the nonwoven fabric first flexes to distribute the pressure on the person's skin, and at the same time, the connecting thread of the three-dimensional knitted fabric flexes until the load is balanced. In this way, the cooperative action of the nonwoven fabric and the bending of the connecting threads can effectively absorb impacts and loads.

[0027] Here, as described above, when a nonwoven fabric is curved so that the inner surface of the curved fabric shrinks significantly, a part of the inner surface is bent at an acute angle due to folding, and does not form a smooth arc. Therefore, if a nonwoven fabric and a three-dimensional knitted fabric are simply laminated and used without being integrated, when the nonwoven fabric is curved, a part of the inner surface of the nonwoven fabric that is in contact with the three-dimensional knitted fabric is bent at an acute angle.

[0028] When the nonwoven fabric is bent in this way, when a person collides with an article wrapped around the cushion and a force is applied to the cushion, the bent corners of the nonwoven fabric are subjected to a relatively larger pressure than other parts. In other words, the small area of ​​the corners causes a large pressure to be applied to the person who collides, and the cushion cannot fully function as a cushion. Furthermore, even when the cushion is used to protect an article, the bent corners of the nonwoven fabric cause a large pressure to be applied to the article.

[0029] In the cushion body of the present invention, the three-dimensional knitted fabric and the nonwoven fabric are laminated together, so that when the nonwoven fabric is curved, the inside surface of the nonwoven fabric tries 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, so that when the nonwoven fabric cushion body is curved, the inside 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 the item wrapped around the cushion body, the nonwoven fabric does not bend in part to apply large pressure to the person, but the person or other object can be received with even and small pressure to absorb the impact.

[0031] In addition, in the present invention, the three-dimensional knitted fabric has a greater elasticity in the surface direction than a nonwoven fabric in both the front ground knit structure and the structure on the opposite side, so that it can be wrapped smoothly around objects with small curvatures.

[0032] When a nonwoven fabric is curved significantly and the inner surface of the curve begins to fold and bend, this can be said to be the limit of the stretchability (particularly compressibility) of the nonwoven fabric. If the elasticity of the three-dimensional knitted fabric is smaller than that of the nonwoven fabric, the three-dimensional knitted fabric will not be able to stretch before the nonwoven fabric bends, and it will not be possible to curve it more than that. Therefore, since it cannot be curved with a large curvature, the article to be wrapped around it will be limited to an article with a slight curvature close to a flat surface.

[0033] In the present invention, the elasticity in the surface direction of both the front ground knit structure and the back ground knit structure of the three-dimensional knitted fabric is made greater than that of the nonwoven fabric, so that even if the article has a large curvature that would cause the nonwoven fabric to bend, it can be positioned smoothly along the surface, and as described above, the nonwoven fabric can be curved smoothly without bending.

[0034] In addition, the surface of the three-dimensional knitted fabric opposite to the surface on which the nonwoven fabric is laminated may have a knitting structure with which a hook fastener can be engaged. The hook fastener engages with the loops by pressing the side raised in a hook shape against the side raised in a dense loop shape. In the present invention, the knitting structure may be one in which the hook side of the hook fastener engages, or the knitting structure may be one in which the loop side engages.

[0035] By forming the surface of the three-dimensional knit fabric opposite to the surface on which the nonwoven fabric is laminated into a knitted structure that can be engaged with a hook-and-loop fastener, it can be easily fixed to an object to be protected to which a separate hook-and-loop fastener is attached. In addition, it is possible to overlap another cushion body to which a separate hook-and-loop fastener is attached, making it possible to adjust the thickness and cushioning properties of the cushion body.

[0036] Furthermore, the knitted fabric on the side to which the nonwoven fabric is bonded in the three-dimensional knitted fabric may be a knitted fabric that does not have holes formed by the knitting structure. A knitted fabric having holes formed by the knitting structure is generally called a "mesh" and is characterized by good breathability. However, in the mesh, at least two rows of chain nets are joined to form edges around the holes, and the spaces between the edges are holes. When such a mesh ground knit structure is used in a cushion body, the holes are not in contact with the nonwoven fabric, so the contact area between the nonwoven fabric and the three-dimensional knit fabric is small. When the contact area is small, the bonding strength between the nonwoven fabric and the three-dimensional knit fabric is reduced, making them more likely to peel off. In addition, strong forces are generated at the edges, which push up the woven parts of the connecting yarns and the ground knit structure, making them more likely to come into contact with the skin via the nonwoven fabric.

[0037] In the present invention, the contact area between the nonwoven fabric and the knitted fabric can be increased by forming a ground knit structure on the side of the three-dimensional knitted fabric to which the nonwoven fabric is bonded as a knit structure having no holes formed by the knit 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, by having no holes, the entire knitted fabric can bear the load, and the interwoven portion of the connecting yarn and the ground knit structure is less likely to be pushed up by the connecting yarn.

[0038] As yet another means, in a configuration comprising a three-dimensional knitted fabric formed by connecting a front ground knitted structure and a back ground knitted structure with a connecting yarn, and a nonwoven fabric arranged and laminated on the three-dimensional knitted fabric, the three-dimensional knitted fabric can also be configured as a laminated integral configuration of 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.

[0039] In this configuration, the nonwoven fabric is laminated and integrated with the first three-dimensional knitted fabric on the opposing surface side of the second 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 this order. In addition, both the front ground knit structure and the back ground knit structure of the first three-dimensional knitted fabric and the second three-dimensional knitted fabric are configured to be stretchable and contractible more than the nonwoven fabric. The three-dimensional knitted fabric may include at least a first three-dimensional knitted fabric and a second three-dimensional knitted fabric, and may further include another three-dimensional knitted fabric.

[0040] In the above configuration, a soft nonwoven fabric is arranged on the outermost surface of the cushion body, and a three-dimensional knitted fabric with relatively low elasticity and a three-dimensional knitted fabric with high elasticity are laminated on the nonwoven fabric. With this layered configuration, when a load is received from the nonwoven fabric side due to a person colliding with the cushion body, the first three-dimensional knitted fabric with relatively low elasticity is initially significantly deformed to distribute the pressure, and the pressure gradually reaches the second three-dimensional knitted fabric with relatively high elasticity, and the second three-dimensional knitted fabric acts to receive the load by its firm elasticity.

[0041] Due to the above action, the reaction force against a person who collides with the cushion increases more slowly, and the energy acting on the collision site is reduced. Also, when an object collides with the cushion, the reaction force received by the object increases more slowly, and the energy acting on the object is reduced. This makes it possible to prevent injury to the person who is collided with and damage to the object that is collided with.

[0042] In the above configuration, it is further possible to laminate a first nonwoven fabric on the opposing side of the second three-dimensional knitted fabric in the first three-dimensional knitted fabric, and to laminate a second nonwoven fabric between the first three-dimensional knitted fabric and the second three-dimensional knitted fabric. The above-mentioned configuration may include at least the first nonwoven fabric and the second nonwoven fabric, and may further include other nonwoven fabrics.

[0043] In a configuration in which the first three-dimensional knitted fabric and the second three-dimensional knitted fabric are laminated so as to be in direct contact with each other, when a force is applied in the thickness direction, the tip of the connecting thread that generates high elasticity may protrude from the front and back knitted fabrics, protruding from the surface and causing a deterioration in the feel. Therefore, by interposing a second nonwoven fabric between the first three-dimensional knitted fabric and the second three-dimensional knitted fabric, it is possible to prevent the connecting thread of the second three-dimensional knitted fabric from protruding, and to improve the pressure resistance and durability of the connecting thread itself.

[0044] In addition, since the nonwoven fabric generally has a denser surface than the front and back knits 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 between the front and back mesh fabrics of the three-dimensional knitted fabric is increased, the area for bonding becomes larger when the fabrics are laminated and integrated using various methods such as adhesives and pressure sensitive adhesives, and the bonding strength becomes stronger, and the pressure resistance and durability of the entire cushion body is improved. Effect of the Invention

[0045] In the cushion body of the present invention, the three-dimensional knitted fabric and the nonwoven fabric are laminated together, and both the front ground knit structure and the back ground knit structure of the three-dimensional knitted fabric are able to stretch and contract more than the nonwoven fabric. As a result, even when wrapped around a curved surface, the inner surface of the nonwoven fabric does not bend, and the fabric can be curved smoothly. The three-dimensional knitted fabric exhibits excellent cushioning properties and durability, while at the same time, because the nonwoven fabric does not bend, there is no reaction force applied to parts of the body due to large pressure from bending points.

[0046] Due to the above-mentioned action, the cushion body of the present invention not only has excellent durability and cushioning properties, but also has the effect of smoothly curving along the curved surfaces of curved objects or curved parts of the body, thereby exhibiting uniform cushioning properties. Furthermore, the cushion body of the present invention, which uses a nonwoven fabric having a dense surface, also has the effect of providing high heat retention. [Brief description of the drawings]

[0047] [Figure 1] 1A and 1B are a perspective view and a cross-sectional view showing a cushion body of the present invention. [Diagram 2] 1 is a schematic diagram showing a three-dimensional knit fabric of a cushion body of the present invention. [Diagram 3] 1 is a schematic diagram showing a nonwoven fabric of a cushion body of the present invention. [Figure 4]1A to 1C are explanatory diagrams showing how to use the cushion body of the present invention. [Diagram 5] 10A and 10B are schematic diagrams illustrating deformation of a non-integrated cushion body when a load is applied thereto. [Figure 6] 5A to 5C are schematic diagrams illustrating deformation of the cushion body of the present invention when a load is applied thereto. [Figure 7] FIG. 4 is an explanatory diagram showing a first modified example of the cushion body of the present invention. [Figure 8] FIG. 11 is an explanatory diagram showing a second modified example of the cushion body of the present invention. [Figure 9] FIG. 11 is a cross-sectional view showing a third modified example of the cushion body of the present invention. [Figure 10] FIG. 11 is a cross-sectional view showing a fourth modified example of the cushion body of the present invention. [Figure 11] FIG. 11 is a cross-sectional view showing a fifth modified example of the cushion body of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0048] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. It should be noted that the configurations in the figures are merely schematic representations for the purpose of explanation.

[0049] As shown in FIG. 1, the cushion body 100 of the present invention is configured by integrally laminating a three-dimensional knitted fabric 1 and a nonwoven fabric 2 in the thickness direction, for example. First, the structure of lamination and integration of the three-dimensional knitted fabric 1 and the nonwoven fabric 2 will be described. In the embodiment shown in Fig. 1, an adhesive 3 that melts and solidifies when heated is applied to the nonwoven fabric 2, and the three-dimensional knitted fabric 1 and the nonwoven fabric 2 are laminated and arranged, and then the three-dimensional knitted fabric 1 or the nonwoven fabric 2 is heated to be integrated. Various methods such as ironing and heat pressing can be used to apply heat, but it is preferable not to apply a large force in order not to deform the three-dimensional knitted fabric 1.

[0050] Methods for laminating and integrating the three-dimensional knitted fabric 1 and the nonwoven fabric 2 include various methods, such as using a thermal adhesive 3, using anaerobic or two-liquid reactive adhesives, melting and solidifying part of the fibers of the three-dimensional knitted fabric 1 or the fibers of the nonwoven fabric 2 to bond them together, bonding them with adhesive tape, sewing, etc.

[0051] Next, the three-dimensional knitted fabric 1 will be described. As shown in Fig. 2(a), the three-dimensional knitted fabric 1 used in the cushion body of Fig. 1 is configured by connecting a front ground knitted structure 11 and a back ground knitted structure 12 with connecting yarns 13-13.... Various yarn materials can be used for the front ground knitted structure 11 and the back ground knitted structure 12, and for example, a multifilament yarn made of polyester can be used. Various thread materials can be used for the connecting thread 13, and for example, a monofilament thread made of polyester can be used. In addition, monofilament yarn may be used for the front ground knit structure 11 and the back ground knit structure 12, and multifilament yarn may be used for the connecting yarn 13, and not only synthetic fibers but also natural fibers may be used.

[0052] The three-dimensional knitted fabric 1 in the form shown in Figure 2 is knitted by a double Russell machine, and for example, one having 18 needle rows per inch or one having 22 needle rows per inch can be used, but is not limited to these.

[0053] As shown in Fig. 2(b), the front ground knit structure 11 is the ground knit structure on the side where the nonwoven fabric 2 is laminated, and is made of polyester multifilament yarn to form a knit fabric without holes (so-called plain structure) formed by the knit structure. As described above, the thickness and material of the yarn used for the front ground knit structure 11 can be appropriately selected. On the other hand, the back side ground knit structure 12 is a so-called mesh structure having holes formed by the knit structure as shown in Fig. 2(c), and is a honeycomb mesh of continuous hexagons in the embodiment shown in Fig. 2. The thickness and material of the yarn used for the back side ground knit structure 12 can also be selected appropriately.

[0054] As for the ground knit structure, both the front side ground knit structure 11 and the back side ground knit structure 12 may be plain structures or may be mesh structures. In addition, they may be structures with any pattern formed thereon, and the shape of the mesh holes may be any shape. As for the structure, it is preferable that the ground knit structure has sufficient stretchability in the wale direction or course direction, or in either direction.

[0055] The connecting yarn 13 is knitted so as to connect the front ground knit structure 11 and the back ground knit structure 12, and is composed of a monofilament yarn made of polyamide or polyester. The thickness of the monofilament yarn can be selected as desired, 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 pop out or the knitted portion between the connecting yarn 13 and the ground knit structure may be pushed up by the connecting yarn 13 oriented in the thickness direction. Therefore, the protruding connecting yarn 13 and the pushed-up knitted portion may strongly abut against the skin via the nonwoven fabric 2, causing discomfort and pain.

[0056] In the case of chemical fibers such as polyamide and polyester generally used for the connecting yarn 13, if the thickness exceeds 300 denier, the above-mentioned popping out or pushing up is likely to occur. Therefore, in order to prevent the connecting yarn 13 from popping out or the knitted portion between the connecting yarn 13 and the front ground knit structure 11 or the back ground knit structure 12 from being pushed up by the connecting yarn 13 oriented in the thickness direction, the fineness of the connecting yarn 13 is preferably 300 denier or less. More preferably, it is 200 denier or less, and even more preferably, it is 150 denier or less. Furthermore, it is more preferable to select a material having flame retardancy or heat resistance. When the connecting yarn 13 is bent, the knitted portion does not strongly abut against the skin through the nonwoven fabric, thereby reducing discomfort and pain.

[0057] The connecting yarn 13 is connected in a slightly bowed state between the front ground knit structure 11 and the back ground knit structure 12 in the areas where the chain stitches are in the same position above and below, but because the back ground knit structure 12 is made of a honeycomb mesh, the connecting yarn 13 is arranged at a large diagonal angle in the areas around the holes where the chain stitch rows are shifted (not shown).

[0058] As a result, the connecting yarns 13 arranged in an arch shape make it difficult for the connecting yarns 13 to collapse and be crushed in the thickness direction, while the connecting yarns 13 arranged diagonally make it difficult for the entire three-dimensional knitted fabric 1 to collapse even if a force is applied from an oblique direction. Furthermore, when a force is applied, the obliquely curved connecting yarns 13 bend like a spring and exhibit appropriate elasticity.

[0059] Next, the nonwoven fabric 2 will be described. The nonwoven fabric 2 used in the cushion body of Fig. 1 is formed into a cloth-like shape without weaving or knitting the short fibers 21, 21..., as shown in Fig. 3. Natural fibers or synthetic fibers can be used as the short fibers 21, 21..., and in the embodiment of Fig. 3, polyester fibers are used in consideration of texture and durability. Other fibers such as cellulose fibers and polyolefin fibers can also be used.

[0060] The nonwoven fabric 2 can be manufactured by various methods, such as a thermal bonding method in which the short fibers 21 are bonded by melting them with heat, a chemical bonding method in which an adhesive is used, and a spunlace method. When the thermal bonding method is used, the short fibers 21 can be bonded together without using an adhesive by using a thermoplastic resin for the fibers. Furthermore, if nonwoven fabric 2 is made of dense fibers with high airtightness, it will be lightweight and have high heat retention.

[0061] The thickness of the nonwoven fabric 2 can be appropriately selected, but it is preferable that it is thinner than the three-dimensional knitted fabric 1, since the curvature of the inner surface does not become large when the fabric is bent and the fabric can be smoothly fitted to an object with a small curvature. Moreover, regardless of the thickness of the three-dimensional knitted fabric 1, it is more preferable that the thickness is 3 mm or less.

[0062] Next, a method of using the cushion body 100 having the above-mentioned configuration will be described. The cushion body 100 is used by wrapping it around an object 4 that may cause injury if it is hit by a body in a place where children play. Examples include a table as shown in Fig. 4(a), as well as the legs and pillars of play equipment. The object 4 is wrapped around a convex part. The start and end of the winding can be fixed in place by various methods. For example, the nonwoven fabric 2 at the start of the winding and the three-dimensional knitted fabric 1 at the end of the winding can be bonded and fixed with double-sided tape.

[0063] When used by wrapping it around an article 4, the cushion body 100 is arranged so that the three-dimensional knitted fabric 1 faces the article 4 and the nonwoven fabric 2 faces outward. In other words, the nonwoven fabric 2 is arranged so that the side (outermost) of the nonwoven fabric 2 that is not in contact with the three-dimensional knitted fabric 1 curves in the stretching direction, and the front ground knit structure 11 of the three-dimensional knitted fabric 1 (the side in contact with the article 4) curves in the shrinking direction.

[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 bending of the cushion body 100 is closer to the three-dimensional knitted fabric 1, both surfaces of the nonwoven fabric 2 and the back ground knit structure 12 of the three-dimensional knitted fabric 1 (the side in contact with the nonwoven fabric 2) will stretch, while the front ground knit structure 11 (the side in contact with the article 4) will shrink. On the other hand, if the curvature is such that the neutral surface is closer to the nonwoven fabric 2, the side (outermost) of the nonwoven fabric 2 that is not in contact with the three-dimensional knitted fabric 1 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 curved state of the cushion body 100, when the neutral surface moves toward the three-dimensional knitted fabric 1, the nonwoven fabric 2 and the back ground knit structure 12 (the side in contact with the nonwoven fabric 2) of the three-dimensional knitted fabric 1 will stretch, so that no part of the surface of the nonwoven fabric 2 will bend in the first place. However, when the neutral surface is shifted toward the nonwoven fabric 2, the surface of the nonwoven fabric 2 in contact with the three-dimensional knitted fabric 1 and the back ground knit structure 12 of the three-dimensional knitted fabric 1 shrink.

[0066] When the surface of the nonwoven fabric 2 in contact with the three-dimensional knitted fabric 1 and the back ground knit structure 12 of the three-dimensional knitted fabric 1 are curved in a shrinking manner, if the curvature is large, 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 together, and further, 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 ground knit structure 12 of the three-dimensional knitted fabric 1 shrinks significantly to form a smooth curved surface, while the nonwoven fabric 2 that is about to bend is pulled back by the elasticity of the bonded and integrated back ground knit structure 12 and the elasticity of the connecting yarn 13. As a result, as shown in Fig. 4(c), it can be curved with a smooth curved surface similar to that of the back ground knit structure 12 without bending.

[0067] As described above, the cushion body 100 in which the nonwoven fabric 2 is smoothly wrapped around the curved surface of the article 4 without bending will be described with reference to Figures 5 and 6 for explaining how the force is absorbed when a load or impact is applied to the cushion body 100, in comparison with the case in which the three-dimensional knitted fabric 1 and the nonwoven fabric 2 are not integrated.

[0068] FIG. 5 shows a schematic diagram of the deformation state of a cushion body 200 in which a three-dimensional knitted fabric 1 and a nonwoven fabric 2 are laminated but are not integrated and are separated, when a load P is applied vertically. As shown in Figure 5(a), when the three-dimensional knitted fabric 1 and nonwoven fabric 2 are layered and not integrated, when the nonwoven fabric 2 is curved and wrapped around the curved surface of the article 4, part of the inner surface of the nonwoven fabric 2 (the surface in contact with the three-dimensional knitted fabric 1) cannot be completely compressed and is bent, resulting in multiple bends.

[0069] When a load P is applied in the thickness direction of the separated cushion body 200 with the nonwoven fabric 2 having a plurality of bent portions, the nonwoven fabric 2 and the three-dimensional knitted fabric 1 will bend as shown in FIG. 5(b). Then, as shown in Figure 5(c), it comes to rest when the reaction force R and the load P are balanced. In the figure, the vertical hatching represents the distribution of the reaction force R. At this time, the total reaction force R over the entire surface receiving the load is equal to the load P. The connecting yarns 13 of the three-dimensional knitted fabric 1 arranged on the inside flex to receive part of the load P, so that the nonwoven fabric 2 arranged on the outside is not completely compressed and crushed, and is able to maintain its cushioning properties.

[0070] However, when viewed locally, at the bent corners of the nonwoven fabric 2, the nonwoven fabric 2 is in a pre-compressed state due to the bending, and the thickness at which the nonwoven fabric 2 can be elastically deformed is relatively reduced. Therefore, for a given load P, the non-bent portion maintains its cushioning properties without being completely compressed and crushed, but the bent portion is completely compressed and crushed. This increases the local reaction force R at the bent portion that forms an acute corner. As a result, the separated cushion body 200 comes into strong contact with the skin of a person who collides with it.

[0071] On the other hand, when the three-dimensional knitted fabric 1 and the nonwoven fabric 2 are laminated together and wrapped around each other to form a smoothly curved surface as shown in Figure 6(a), when a load is applied in the thickness direction of the cushion body 100, the connecting yarns 13 of the nonwoven fabric 2 and the three-dimensional knitted fabric 1 bend, as shown in Figure 6(b), and a reaction force is generated by the nonwoven fabric 2 and the three-dimensional knitted fabric 1. Then, as shown in Fig. 6(c), it comes to a standstill when the reaction force and the load are balanced. At this time, similar to the embodiment in Fig. 5, the total load and the total reaction force are equal on the entire surface receiving the load. The connecting yarns 13 of the three-dimensional knitted fabric 1 arranged on the inside flex to receive part of the load, so that the nonwoven fabric 2 arranged on the outside is not completely compressed and crushed, and can maintain its cushioning properties.

[0072] 5, bending occurs in the nonwoven fabric 2, resulting in localized areas of increased reaction force R. In contrast, in the embodiment of FIG. 6, bending does not occur in the nonwoven fabric 2, resulting in a smooth distribution of reaction force over the entire surface receiving the load P, and there are no areas where reaction force R increases locally. As a result, there is no part that strongly contacts the skin of a person who collides with the cushion body 100, and uniform cushioning properties can be exhibited. Furthermore, when the cushion body 100 is subjected to an impact or load, as described above, the cooperative action of the bending of the nonwoven fabric 2 and the connecting thread 13 allows the cushion body 100 to effectively absorb the impact or load without the connecting thread 13 bending or buckling.

[0073] 『Variation 1』 The present invention is not limited to the above-described embodiment, and other embodiments may be adopted. For example, as shown in Fig. 7, both the front side ground knit structure 11 and the back side ground knit structure 12 of the three-dimensional knitted fabric 1 in the cushion body 101 can be made of a mesh structure. The material and bonding state of the yarn material and nonwoven fabric 2 of the three-dimensional knitted fabric 1 in this modified example are similar to those of the embodiment in Fig. 1, but the structure of the three-dimensional knitted fabric 1 is different.

[0074] In this modified example, the front side ground knit structure 11 and the back side ground knit structure 12 are knitted so that hexagonal openings and rectangular openings are arranged alternately, and the hexagonal openings of the front side ground knit structure 11 and the rectangular openings of the back side ground knit structure 12 are arranged in opposing positions.

[0075] To describe the knitting structure in detail, when viewed in a plane with the wale direction being the horizontal direction and the course direction being the vertical direction, as shown in Figure 7, each parallel side of the hexagonal opening is made up of two rows of chain stitches and is arranged side by side 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 rectangular openings are arranged at an angle of 45 degrees, and are arranged in a state where a vertex in the course direction of the hexagonal opening is connected to the end points of each parallel side of the hexagonal opening. In other words, the rectangular openings are arranged at an angle of 45 degrees, and are arranged continuously in the wale direction with one of the vertices shared with the vertex of an adjacent rectangular opening.

[0077] The connecting yarns 13 are knitted so as to have portions that are connected substantially perpendicularly and portions that are connected diagonally between the front side ground knit structure 11 and the back side ground knit structure 12. In detail, the connecting yarns 13 are arranged substantially perpendicularly between the vertices of the rectangular opening and the two parallel sides of the hexagonal opening. On the other hand, the connecting yarns 13 are arranged diagonally between each side of the rectangular opening and each side of the hexagonal opening.

[0078] In the configuration of FIG. 7, when the three-dimensional knitted fabric 1 is pulled in the course direction, the hexagonal openings and the rectangular openings are deformed so as to be crushed, and the fabric is stretched significantly. On the other hand, when pulled in the wale direction, the square opening is deformed as if it is crushed, but the hexagonal opening stretches relatively little because the two parallel sides support it and suppress the deformation of the hexagon.

[0079] In this manner, by configuring the three-dimensional knitted fabric 1 of this modified example, it can be made to stretch greatly in the course direction, so that it can be smoothly wrapped around an article 4 having a larger curvature.

[0080] In the configuration of FIG. 7, it is also possible to laminate nonwoven fabrics 2-2... on both sides of the front ground knit structure 11 and the back ground knit structure 12 of the three-dimensional knit fabric 1 (not shown). The three-dimensional knitted fabric 1 in the form of Fig. 7 has relatively large hexagonal and rectangular openings. When nonwoven fabrics 2·2 are laminated on both sides of this three-dimensional knitted fabric 1, the nonwoven fabrics 2·2 are bent at the hexagonal and rectangular openings by the bonding process of the nonwoven fabrics 2·2, and the nonwoven fabrics 2·2 come into partial contact with each other.

[0081] In the areas where the nonwoven fabrics 2 and 2 come into contact with each other, the nonwoven fabrics, which tend to have entangled fibers, are firmly bonded together and integrated. That is, in the openings, the nonwoven fabrics 2 and 2 are bonded to each other, and in areas other than the openings, the front ground knit structure 11 or the back ground knit structure 12 is bonded to the nonwoven fabrics 2 and 2. In this way, by having not only the adhesive portions between the front side ground knit structure 11 and the back side ground knit structure 12 and the nonwoven fabric 2 but also the portions where the nonwoven fabrics 2-2 are adhesively bonded to each other, the adhesive strength between the three-dimensional knit fabric 1 and the nonwoven fabric 2 can be improved, and the rigidity of the entire cushion body 101 is improved, stabilizing the shape.

[0082] When the nonwoven fabrics 2·2 are bonded together at the opening, the shape of the opening may be various shapes other than the hexagon and rectangle as shown in Fig. 7. Regardless of the shape, as long as the nonwoven fabrics 2·2 are in contact with each other at the opening and are tightly adhered to each other, the thickness of the nonwoven fabrics and the size of the opening can be appropriately selected.

[0083] 『Variation 2』 The present invention can also adopt other forms. For example, it is possible to make a cushion body 102 in a configuration in which the three-dimensional knitted fabric 1 of the configuration in Fig. 1 is arranged at an angle of 45 degrees, as shown in Fig. 8. The yarn material and structure of the three-dimensional knitted fabric 1 in this modification, and the material and bonding state of the nonwoven fabric 2 are similar to those in the embodiment in Fig. 1, but the inclination of the three-dimensional knitted fabric 1 is different.

[0084] A double raschel knitted fabric has a certain degree of stretchability whether it is a plain weave or a mesh weave, but the stretch rate 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 arranged to be obliquely 45 degrees with respect to the outer shape of the cushion body 102 (connecting yarns 13, 13 . . . are omitted).

[0085] By disposing it obliquely in this manner, the same rate of expansion and contraction can be achieved whether it is wrapped in the horizontal direction or the vertical direction of the outer shape of the cushion body 102. Therefore, there is no need to determine the orientation of the cushion body 102 during the wrapping operation, which improves workability.

[0086] 『Variation 3』 The present invention can also adopt other forms. For example, as shown in Figure 9, the three-dimensional knitted fabric 1 of Figure 1 can be made into a cushion body 103 having a laminated configuration in which a first three-dimensional knitted fabric, a low-elasticity three-dimensional knitted fabric 10 (hereinafter referred to as a "low-elasticity three-dimensional knitted fabric"), and a second three-dimensional knitted fabric, a high-elasticity three-dimensional knitted fabric 20 (hereinafter referred to as a "high-elasticity three-dimensional knitted fabric"), are integrated together.

[0087] In this modification, a nonwoven fabric 2 is laminated and integrated with the low elasticity three-dimensional knitted fabric 10 on the opposing surface side of the high elasticity three-dimensional knitted fabric 20 . In this modified example, the front ground knit structure 101 and the back ground knit structure 102 in the low elasticity three-dimensional knit fabric 10 and the front ground knit structure 201 and the back ground knit structure 202 in the high elasticity three-dimensional knit fabric 20 are both capable of stretching greater than or equal to the nonwoven fabric 2.

[0088] In the embodiment shown in Fig. 9, the connecting yarns 103 of the low elasticity three-dimensional knitted fabric 10 are knitted to have a smaller fineness and fewer number of yarns than the connecting yarns 203 of the high elasticity three-dimensional knitted fabric 20. In this manner, the elasticity in the thickness direction can be adjusted as desired by adjusting the material and structure of the connecting yarns 103-203. In this modification, the three-dimensional knitted fabric on the side where the nonwoven fabric 2 is laminated is configured to have low elasticity, and a high elasticity three-dimensional knitted fabric 20, which has higher elasticity than the low elasticity three-dimensional knitted fabric, is laminated and integrated with the low elasticity three-dimensional knitted fabric to form a three-layer structure.

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

[0090] Due to this action, the reaction force acting on the person who collides with the cushion body 103 increases more slowly, and the energy acting on the collision site decreases, thereby preventing injury to the person who is collided with.

[0091] 『Variation 4』 In the above modified example, a first nonwoven fabric 30 can be laminated integrally on the opposing side of the high elasticity three-dimensional knitted fabric 20 in the low elasticity three-dimensional knitted fabric 10, and a second nonwoven fabric 40 can be laminated integrally between the low elasticity three-dimensional knitted fabric 10 and the high elasticity three-dimensional knitted fabric 20, as shown in Figure 10, to form a cushion body 104.

[0092] In this case, it is sufficient that the second nonwoven fabric 40 has a thickness sufficient to prevent the connecting yarns 203 of the highly elastic three-dimensional knitted fabric 20 from popping out when a force is applied in the thickness direction of the cushion body 104. By providing a nonwoven fabric with a necessary and sufficient thickness, it is possible to prevent the nonwoven fabric from becoming excessively thick and difficult to bend, and it becomes easier to curve smoothly along the 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, the connecting yarn 203 of the highly elastic three-dimensional knitted fabric 20 can be prevented from protruding, and the stability of the connecting yarn 203 is improved.

[0093] In addition, since the nonwoven fabric generally has a denser surface than the front and back knits of the 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 low elastic three-dimensional knitted fabric 10, increases. Therefore, for example, when laminating and integrating with a thermal adhesive, the adhesive can be applied without gaps between the second nonwoven fabric 40 and the low elastic three-dimensional knitted fabric 10 and the high elastic three-dimensional knitted fabric 20, so that the strength after bonding is increased.

[0094] 『Variation 5』 In the present invention, the three-dimensional knitted fabric 1 is further composed of a front ground knit structure 11 and a pile structure 15 formed in a loop shape in the thickness direction, as shown in Fig. 11. In this modification, a nonwoven fabric 2 is laminated on the front ground knit structure 11 of the three-dimensional knitted fabric 1, and the pile structure 15 is composed as a knit structure with which a hook-and-loop fastener 300 can be engaged. To give a more detailed description of the knitting structure with which the hook and loop fastener 300 can be engaged, in this modification, the knitting structure of the pile structure 15 can be a knitting structure that forms loops 14-14 whose size and intervals are adjusted so as to engage with the hook side 310 of the hook and loop fastener 300. For example, by adjusting the size and intervals to an integer multiple of the pitch of the hooks of the hook and loop fastener 300, a firm engagement can be achieved.

[0095] In addition to the above, the pile yarns 15 may be knitted in such a way that they engage with the loop side 320 of the hook-and-loop fastener 300 . In this case, a method can be used in which parts of the loops 14 protruding from the pile yarn 15 are cut off to form hooks (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 the product to an object to be protected, such as a desk leg, to which a separate hook-and-loop fastener is attached. In addition, by pressing the hook-and-loop fasteners against each other, the thickness and cushioning properties can be easily adjusted by stacking the hook-and-loop fasteners against other cushion bodies having hook-and-loop fasteners attached.

[0097] Furthermore, in the present invention, loops 14 / 14 are formed in the pile structure 15 of one of the cushion bodies, and part of the loops 14 / 14 protruding from the pile structure 15 of the other cushion body is cut to form a hook shape, so that the pile structures 15 / 15 themselves act as hook-and-loop fasteners and can be stacked together without using a separate hook-and-loop fastener 300.

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

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

[0100] In addition, since the nonwoven fabric is disposed on the inside of the curve, the inner surface of the nonwoven fabric is not compressed enough when curved, and thus the nonwoven fabric is prevented from folding. Therefore, it is preferable that the thickness of the nonwoven fabric is thin. On the other hand, when improving heat retention, it is preferable to select a material with dense fibers and high airtightness.

[0101] In the present invention, in addition to the above, it is also possible to partially use a woven fabric having similar physical properties to the nonwoven fabric. In addition, the cushion body of the present invention can be used in a variety of applications, such as hats and helmets, brassiere pads, protective materials for attaching to the corners of desks and the legs of chairs, seat cushions and cushions, chair cushions, pillows, curtains, wall cushions, floor cushions, stair cushions, reclining bed pads, thermal insulation sheets for agricultural greenhouses, outdoor rugs and tent materials, sports and medical supports, thermal cushioning materials, sleeping bags, insoles and outer materials for shoes, seat materials for bicycles, motorbikes, automobiles and ships, and base fabrics for embroidery. [Explanation of symbols]

[0102] 100, 101, 102, 103, 104, 105 Cushion body 1. Three-dimensional knitting 11 Front ground knitting structure 12 Back side knitting structure 13 Connecting Thread 14 Loop 15 Pile structure 2. Nonwoven fabric 21 Staple Fiber 3. Glue 4 Goods 10. Low-elasticity three-dimensional knitted fabric 101 Front ground knitting structure 102 Back side ground knitting structure 103 Connecting Thread 20 Highly elastic three-dimensional knitted fabric 201 Front ground knitting structure 202 Back side ground knitting structure 203 Connecting Thread 30 First Nonwoven 40 Second Nonwoven Fabric 200 Separate cushion body 300 hook and loop fastener 310 Hook side 320 Loop side

Claims

1. A three-dimensional knitted fabric and a nonwoven fabric arranged to be laminated on the three-dimensional knitted fabric, The three-dimensional knitted fabric is configured by connecting a front ground knit structure and a back ground knit structure with a connecting yarn, or is configured by a front ground knit structure and a pile structure, The three-dimensional knitted fabric and the nonwoven fabric are laminated and integrated in the thickness direction, The cushion body is characterized in that the three-dimensional knitted fabric has a greater stretchability in the surface direction than the nonwoven fabric in both the front ground knit structure and the structure on the opposite surface.

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

3. 3. The cushion body according to claim 1, wherein the three-dimensional knitted fabric has no holes formed by the knitting structure in the knitted fabric on the side to which the nonwoven fabric is bonded.

4. The present invention provides a three-dimensional knitted fabric formed by connecting a front ground knitted structure and a back ground knitted structure with a connecting yarn, and a nonwoven fabric laminated to the three-dimensional knitted fabric, The three-dimensional knitted fabric is formed by laminating and integrating a first three-dimensional knitted fabric and a second three-dimensional knitted fabric having a higher elasticity in a thickness direction than the first three-dimensional knitted fabric, The nonwoven fabric is laminated and integrated with the first three-dimensional knitted fabric on the opposing surface side of the second three-dimensional knitted fabric, The cushion body is characterized in that the stretchability in the surface direction in both the front ground knit structure and the back ground knit structure of the first three-dimensional knitted fabric and the second three-dimensional knitted fabric is greater than that of the nonwoven fabric.

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