JP2012110437A - Cushion body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the cushion performance of a cushion body constituting a mattress or others.SOLUTION: The cushion body 20 is constituted of two block materials 22, 32 constituted by forming a resin foam with elasticity to a cuboid shape. The cushion body is constituted by bending the block material 22, 32 into a U-shape, fitting the same into the inside of the U-shape alternately, and bonding the fitting site. Hole parts 40 opening to the outer peripheral face side are arranged in the bent part 26, 36 in the cushion body 20, compression-deflecting loads are different in parts constituted by bonding the block bodies and the bent parts 26, 36.

Description

  The present invention relates to a cushion body constituting a mattress or the like.

  For example, in a mattress, an appropriate number of coil springs are arranged between a plate-like upper cushion material constituting the upper surface and a plate-like lower cushion material constituting the lower surface, and the load from the upper cushion material is applied to each coil spring. It is configured to receive it elastically. However, the coil spring is made of metal made of spring steel or the like, and the material is different from the upper cushion material and lower cushion material made of urethane. Therefore, when the mattress is disposed of, the cushion material is separated from the coil spring. The disposal work is cumbersome and troublesome.

  Therefore, in recent years, as an alternative member for a metal coil spring, as shown in FIG. 11, a cylindrical annular cushion material 50 formed of a resin foam has been put into practical use (see, for example, Patent Document 1). This annular cushion member 50 is formed by rounding a rectangular resin foam 52 having elasticity as shown in FIG. 13 into an annular shape so that side surfaces 52a and 52a spaced apart in the longitudinal direction abut each other. It is formed into a cylindrical shape by bonding with an adhesive. In the resin foam 52, a plurality of slits 54 are formed penetrating in the thickness direction along the short direction of the resin foam 52, and when the annular cushion material 50 is formed by rolling the resin foam, the slits are formed. 54 expands to the outer peripheral surface side, and the outer peripheral surface of the annular cushion member 50 is net-like. Then, as shown in FIG. 12, the annular cushion material 50 abuts the lower end surface 50 a of the cylindrical shape (one end surface spaced apart in the short direction of the resin foam 52) 50 a against the lower cushion material 12 of the mattress 10. The mattress 10 is placed in the posture in which the upper cushion material 14 is placed on the upper end surface 50b.

Special table 2007-520284

  A cushion such as a mattress is required to have a cushioning characteristic such that the compressive deflection load is low (soft) at the initial stage of load input, and the compressive deflection load increases (hard) as the load is applied. However, like the annular cushion material 50 disclosed in Patent Document 1, it is difficult to adjust the compression deflection load of the one made of the block material of the single resin foam 52, and in particular, the compression deflection load is set high. It is difficult to configure so as to exhibit suitable cushion characteristics. For example, the annular cushion material 50 is open so that the slits 54 are scattered throughout the resin foam 52 and the outer peripheral surface side of the slits 54 is widened to ensure air permeability. That is, the annular cushion material 50 has a relatively low compressive deflection load due to the open slit 54, and it is difficult to set the compressive deflection load high. Further, the annular cushion material 50 can be set to have a high compressive deflection load by setting the resin foam 52 itself to be hard, but is required at the initial stage of load input depending on the hardness of the resin foam 52. Softness will be lost.

  That is, the present invention has been proposed in order to suitably solve these problems inherent in the cushion body according to the prior art, and is a cushion body capable of adjusting the compression deflection load while maintaining appropriate cushion characteristics. The purpose is to provide.

In order to overcome the above-mentioned problems and achieve the intended object, the cushion body of the invention according to claim 1 of the present application,
Consists of two block materials formed of a resin foam having elasticity in a rectangular parallelepiped shape,
One of the pair of second opposing piece portions that are formed by facing the second block material between the pair of first opposing piece portions that are formed by facing the first block material. And sandwiching one of the first opposing piece parts between a pair of second opposing piece parts, and joining the clamping parts together,
The block material is provided with a hole portion that leads to at least a surface on the outer peripheral surface side of the curve corresponding to the curved portion that is curved by connecting the pair of opposed pieces, and the bending of the block material The gist is that the hole portion is configured to open on the outer peripheral surface of the curved portion.
According to the first aspect of the present invention, the compressive deflection load can be set relatively high at the portion where the opposing pieces of the block material are joined to each other, and the relatively compressive deflection load at the curved portion where the hole portion opens on the outer peripheral surface side. Can be set low. Thereby, the balance of the compression deflection load as a whole cushion body is improved, and the compression deflection load can be appropriately adjusted while maintaining appropriate cushion characteristics.

The gist of the invention according to claim 2 is that the hole is formed so as to communicate with the inside and outside of the bending of the block material.
According to the invention which concerns on Claim 2, while providing a hole part corresponding to a curved part, while being able to bend a block material easily, the air permeability of a cushion body can be improved.

In the invention according to claim 3, the hole is formed in a slit shape extending along the bending axis direction of the block material, and the bending direction outside of the hole is expanded in the bending portion due to the bending of the block material. The main point is to be opened.
According to the invention which concerns on Claim 3, air permeability can be improved, without impairing the resilience of a cushion body by forming a hole part in slit shape.

The invention according to claim 4 is characterized in that the two block members are set to have the same size in the bending axis direction of the bending portion, and are joined with the side surfaces intersecting the bending axis direction being aligned with each other. And
According to the fourth aspect of the invention, since the end surfaces composed of the opposing pieces joined to each other can be made horizontal, the end surfaces can be brought into contact with each other and stably installed on the installation site, and the load can be applied via the end surfaces. Can be received appropriately.

  According to the cushion body according to the present invention, the compressive deflection load can be appropriately adjusted while maintaining appropriate cushion characteristics.

1 is a schematic perspective view showing a cushion body according to a preferred embodiment of the present invention. It is A arrow directional view of FIG. It is a B arrow line view of FIG. It is a schematic perspective view which shows the block material which comprises the cushion body of an Example. In the cushion body of an Example, it is a schematic perspective view which shows the state before a block material is mutually assembled | attached. It is a top view which partially cuts and shows the mattress using the cushion body of an Example. It is principal part sectional drawing which shows the mattress using the cushion body of an Example. It is a front view which shows the block material of the cushion body of the Example used by experiment. It is a top view which shows the cushion body of the Example used in experiment. It is a graph which shows the bending load curve which concerns on an experiment example. It is a schematic perspective view which shows the conventional annular cushion material. It is principal part sectional drawing which shows the mattress using the conventional annular cushion material. It is a schematic perspective view which shows the block material which comprises the conventional annular cushion material.

  Next, a cushioning body according to the present invention will be described below with reference to the accompanying drawings by way of preferred examples.

  The cushion body 20 according to the embodiment shown in FIGS. 1 to 3 is used for a mattress of a bed, a cushion of a sofa, a seat of a vehicle or the like, and constitutes a cushion member that elastically supports a load in these members. It is. The cushion body 20 made of a resin foam can replace the function of the coil spring in the mattress, for example, and can be reduced in weight as compared with the coil spring as described above, and can be easily recycled. It has various advantages such as no abnormal noise.

As shown in FIG. 1 or FIG. 5, the cushion body 20 is configured as one member by combining two block members 22 and 32 curved in a U-shape so as to be alternately fitted. Each block material 22 and 32 is formed from a resin foam having elasticity. As the resin foam, polyurethane foam, polyolefin foam such as polyethylene, rubber sponge and the like can be used. Among these, polyurethane foam is most suitable from the viewpoints of ease of production and handleability. The resin foam is a so-called flexible foam having a foaming ratio of about 10 to 60 times and an apparent density of about 16 to 100 kg / m ³ and is soft and has a restorability (no plastic deformation). It is desirable to have an open cell structure. In the examples, a flexible urethane foam having an open cell structure is used as the resin foam.

  As shown in FIG. 4, the block members 22 and 32 are resin foam plate-like blocks formed in a rectangular parallelepiped shape. The block members 22 and 32 are formed into a predetermined shape by cutting, for example, a resin foam slab material. In the embodiment, a rectangular surface surrounded by a long side and a short side shorter than the long side is used as a plate surface. The thickness is thinner than the short side. In the following description of the block materials 22 and 32, the direction along the long sides of the block materials 22 and 32 is referred to as the longitudinal direction, and the direction along the short sides of the block materials 22 and 32 is referred to as the short direction. A direction along the shortest side of the materials 22 and 32 is referred to as a thickness direction. In the embodiment, the two block members 22 and 32 are formed from the same resin foam, and the physical properties of the two block members 22 and 32 are the same. The two block members 22 and 32 are set to have the same shape and the same size.

  The block members 22, 32 correspond to the portions that become the curved portions 26, 36 of the cushion body 20 when the block members 22, 32 are curved and combined with the other block members 32, 22. A hole 40 is provided (see FIG. 2, FIG. 4 or FIG. 5). Since the block members 22 and 32 of the embodiment have a configuration in which the long sides are curved with the short direction as the bending axis J (see FIG. 5), a hole is formed in the center portion of the block members 22 and 32 in the longitudinal direction. 40 is provided. Further, the hole 40 is formed so as to communicate with the outer peripheral surface side of the bending at the curved portions 26 and 36 of the cushion body 20, and the block members 22 and 32 are formed on the plate surface through which the hole 40 is communicated. It is curved to The block members 22, 32 of the embodiment are not only the portions corresponding to the curved portions 26, 36 of the cushion body 20, but also the holes 40 in the portions corresponding to the opposing pieces 24, 34 joined together in the cushion body 20. And a plurality of holes 40 are scattered over the entire plate surfaces of the block members 22 and 32 (see FIG. 4). Further, the hole 40 is formed to communicate with the block members 22 and 32 in the thickness direction. The hole portion 40 has a slit shape extending in the short direction of the block members 22 and 32, and is formed by making a notch penetrating in the thickness direction of the block members 22 and 32. In the block members 22 and 32, each hole 40 is closed in a flatly extended posture (see FIG. 4).

  As shown in FIG. 4, the block members 22 and 32 are provided with a plurality of hole portions 40 arranged in a line in the short direction, and adjacent hole portions 40 in the longitudinal direction are shifted from each other in the short direction. Has been. That is, in the block members 22 and 32, a plurality of groups of hole portions 40 arranged in a line in the short direction are provided apart from each other in the longitudinal direction, and the holes 40 of adjacent groups are shifted from each other in a staggered manner. Has been placed. Thus, in the block materials 22 and 32, the part cut | disconnected by the hole 40 is not aligned in a longitudinal direction. The two block members 22 and 32 are configured to have the same shape, size and arrangement of the hole 40.

  As shown in FIG. 1, the cushion body 20 includes a second block member 32 between a pair of first opposing pieces 24, 24 each having a plate surface facing each other by curving the first block member 22. Is sandwiched by sandwiching one of the pair of second opposing piece portions 34, 34, each of which faces the plate surface, and the first opposing piece portion 24 between the pair of second opposing piece portions 34, 34. , 24 is sandwiched and the sandwiched portions are joined to each other. Here, in the cushion body 20, the longitudinal direction of the block members 22 and 32 comes to extend along the circumferential direction of the curved portions 26 and 36 and the extending direction from the curved portions 26 and 36 in the opposing piece portions 24 and 34, The short direction of the block members 22 and 32 is along the curved axis direction along the central axis of the bending of the bending portions 26 and 36, and the thickness direction of the block materials 22 and 32 is the bending of the bending portions 26 and 36. It is along the inside and outside direction.

  More specifically, the first block member 22 has a pair of first opposing piece portions 24 and 24 facing each other and a pair of first opposing pieces 24 and 24 that are opposed to each other by bending the long side with the short direction as a bending axis J. The first opposing piece portions 24, 24 are connected to bend and formed into a U-shape that is curved (see FIG. 5). Similarly, the second block member 32 is bent so that the long side is curved with the short direction as the bending axis J, so that the pair of second facing pieces 34 and 34 facing the plate surface and the pair of second pieces It is curved and formed into a U-shape consisting of a second bending portion 36 that extends and curves between the opposing piece portions 34, 34. Here, each of the first block material 22 and the second block material 32 is curved so that the side surfaces separated in the longitudinal direction are aligned (see FIG. 5). The first block member 22 and the second block member 32 are arranged with the U-shaped open ends facing each other in the cushion body 20, and the one opposing piece portion 24, 34 is replaced with the opposite opposing piece portion 34, 34, 34. 24 and 24 are inserted into each other and combined in a staggered manner. In the cushion body 20, the other opposing piece portion 34, 24 is sandwiched between the pair of opposing piece portions 24, 24, 34, 34, and the first opposing piece portion 24 and the second opposing piece portion 34 are predetermined. It is joined by the joining means. Here, as a joining means, an adhesive, welding by heat, or the like can be employed, and in the embodiment, a urethane adhesive of the same system as the resin foam is used. In the cushion body 20, the sizes of the bending portions 26, 36 of the two block members 22, 32 are set to be the same in the bending axis direction (short direction), and intersect the bending axis direction of the block members 22, 32. The side surfaces are joined to each other. That is, the cushion body 20 is configured such that each of the support end surfaces (end surfaces) 20a configured by the side surfaces intersecting the curved axis direction of the four opposing pieces 24, 24, 36, and 36 aligned in a horizontal manner. A pair of support end surfaces 20a, 20a that are separated in the curved axis direction are formed in a parallel relationship (see FIG. 2 or FIG. 3).

  Since the cushion body 20 is provided with holes in the block members 22 and 32 in advance, the outer peripheral surface side of the bending portions 26 and 36 is stretched compared to the inner peripheral surface side due to a difference in inner and outer peripheral lengths, and the bending portion 26 , 36 are opened on the outer peripheral surface side, while being closed on the inner peripheral surface side. In the embodiment, the hole 40 provided in the bending portions 26 and 36 is expanded in the circumferential direction so that the outer peripheral surface side is opened from the closed state in the flat state of the block members 22 and 32, and is adjacent to the circumferential direction. Since the matching hole portions 40 are arranged so as to be shifted in the direction of the curved axis, each hole portion 40 opens in a substantially rhombus shape. On the other hand, in the cushion body 20, since the opposing piece portions 24 and 34 are in a state of extending flat, the hole 40 provided in the opposing piece portions 24 and 34 is different from the flat state of the block members 22 and 32. In the embodiment, the slit-shaped hole 40 is closed.

  The case where the cushion body 20 is used for the mattress 10, for example, will be briefly described. As shown in FIG. 7, the cushion body 20 is placed in a state where the lower support end surface 20a is in contact with the lower cushion material 12 such as a urethane sheet, and the upper support end surface 20a is made of a urethane sheet or the like. The upper cushion material 14 is supported and used so that a load is applied (compressed) in the direction of the curved axis of the cushion body 20. As shown in FIG. 6, a plurality of cushion bodies 20 are arranged on the mattress 10 in a posture with the curved axis J upright, and a circular cushion core 16 or a plate shape made of the same resin foam as the cushion body 20 is arranged. The cushion core 18 is installed. As described above, the mattress 10 is composed of a plurality of types of resin foams having different characteristics in the core material portion sandwiched between the lower cushion material 12 and the upper cushion material 14. The cushion body 20 is preferably used in a portion where a relatively large load is applied in the mattress 10. In the embodiment, the cushion body 20 is preferably used in a portion corresponding to the waist of a person who is lying on the mattress 10. That is, the cushion body 20 of the embodiment is disposed in the center region in the longitudinal direction of the mattress 10 (see FIG. 6).

(Effects of Example)
Next, the operation of the cushion body 20 according to the embodiment will be described. The cushion body 20 is installed in a posture in which the curved axis J is upright, and receives a load on the upper support end surface 20a. The cushion body 20 is formed by combining the two block members 22 and 32 so that the four opposing piece portions 24, 24, 34, and 34 are joined together to form one block. Compared to the case where only one block member 22 or 32 is compressed in the short direction, the compressive deflection load can be set higher (harder) in that portion. On the other hand, in the cushion body 20, since the curved portions 26, 36 are composed of only one block member 22, 32, compared to the portion where the four opposing piece portions 24, 24, 34, 34 are joined. The compression deflection load can be set low (soft). Further, in the cushion body 20, the slit-shaped hole 40 is opened to the outer peripheral surface side in the curved portions 26, 36, and a gap is formed, while the hole 40 of the opposing piece portions 24, 34 is closed. Therefore, the bending portion 26 can be made softer than the portion where the four opposing piece portions 24, 24, 34, 34 are joined. In addition, the cushion body 20 is a combination of the two opposing pieces 24, 24, 34, 34 by combining the two blocks 22, 32 without changing the compressive deflection load of the blocks 22, 32. Since the compressive deflection load can be increased, the compression deflection load is low (soft) in the initial stage of load input, and the cushion characteristic that the compression deflection load increases (hard) as the load is applied is not impaired. Thus, according to the cushion body 20 of the embodiment, the balance of the compression deflection load as a whole is improved, and the compression deflection load can be appropriately adjusted while maintaining appropriate cushion characteristics. Here, according to the cushion body of the embodiment, as described above, the stress (compression deflection load) is increased when the body is compressed and deformed to some extent, so that the cushion characteristic that does not bottom out can be improved.

  Since the hole 40 is provided in the part bent in the block materials 22 and 32, the cushion body 20 can be easily bent, and the outer peripheral surface of the hole 40 in the curved portions 26 and 36. Since it opens so that the side may open, the air permeability can be improved by the hole 40. Moreover, since the hole 40 is formed in a slit shape, it is possible to suppress chipping of the resin foam that generates elasticity, and therefore, it is easy to set the compression deflection load of the cushion body 20 high. That is, by forming the hole 40 in a slit shape, the air permeability can be improved without impairing the resilience of the cushion body 20. Thus, the cushion body 20 is formed in a slit shape in which the hole portion 40 extends in the direction of the curved axis, and the hole portion 40 of the opposing piece portions 24 and 34 is closed in a normal state where no load is applied. However, since the hole 40 of the opposing piece portions 24 and 34 is also opened in the circumferential direction by receiving the load at the support end surface 20a and compressively deforming, the air permeability of the opposing piece portions 24 and 34 is ensured. Can do. Thus, the hysteresis loss rate of the cushion body 20 can be reduced by providing the hole 40 and improving the air permeability. Here, as a cushion characteristic, in addition to the deflection amount with respect to the input of the load described above, it is required that the hysteresis loss rate (JIS K6400-2) is small and the return after releasing the load is quick. The hysteresis loss rate indicates a mechanical energy loss in one cycle of deformation and recovery, and is obtained from a force-deflection curve obtained by performing a deflection test under a compressive deflection load. The higher the hysteresis loss rate, the slower the recovery, and the repulsive force at the time of opening after the push-in decreases, so that a so-called viscous foam is obtained.

  Since the cushion body 20 has a support end surface 20a composed of opposing pieces 24, 24, 34, and 34 joined to each other, the cushion body 20 is stably installed with respect to the lower cushion material 12. In addition, a wide bonding area can be secured between the lower cushion material 12 and the lower support end surface 20a. Further, since the cushion body 20 supports the upper cushion material 14 by the upper horizontal support end surface 20a, the unevenness of the upper cushion material 14 can be minimized, and the upper cushion material 14 and the upper support end surface can be suppressed. A wide bonding area can be ensured with 20a. In addition, the cushion body 20 can appropriately receive a load via the upper horizontal support end surface 20a, and the lower cushion material 12 is satisfactorily supported by the lower cushion material 12 while receiving the load received by the upper support end surface 20a. The opposing pieces 24 and 34 can be appropriately compressed between the support end surface 20a. Therefore, the cushion body 20 of the embodiment exhibits excellent cushion characteristics.

  The cushion body 20 can be adjusted so as to be soft as a whole, if the portions where the two block members 22 and 32 are overlapped and joined are reduced and the curved portions 26 and 36 are set large. On the other hand, the cushion body 20 can be adjusted so as to be hard as a whole when the opposing pieces 24 and 34 of the two block members 22 and 32 are overlapped and the portions joined to each other are enlarged. Thus, according to the cushion body 20, hardness can be easily adjusted by changing the range of the part to which the opposing piece parts 24 and 34 in the two block materials 22 and 32 are joined.

(Experimental example)
A compression deflection load test was performed on the cushion body 20 of the example, and the cushion characteristics were confirmed. In addition, as a comparative example, a compression deflection load test was performed on the cushion body (Comparative Example 1) and the rectangular parallelepiped block material (Comparative Example 2) cited as the conventional example (FIG. 10). In Examples, Comparative Examples 1 and 2, a flexible urethane foam (foaming ratio: 40 times, apparent density: 25 kg / m ³ ) is used as the resin foam constituting the block material. The cushion body 20 of the embodiment is formed by bending two block members 22 and 32 formed in a size of 210 mm wide × 60 mm long × 30 mm thick as shown in FIG. 8 into a U shape, as shown in FIG. The parts overlapped with each other so as to overlap each other by 35 mm are joined together with an adhesive. In the block members 22 and 32 of the hole embodiment, slit-like hole portions 40 are formed so as to penetrate in the thickness direction at the pitch shown in FIG. 8 along the short direction which is the curved axis direction of the cushion body 20. Has been. In FIG. 9, the hole 40 is omitted. The cushion body of Comparative Example 1 is configured by using one block material shown in FIG. 8. The block body is rounded so as to bend the longitudinal side of the block body, and the side surfaces separated in the longitudinal direction are butted together and bonded with an adhesive. By doing so, it is formed in a cylindrical shape. As for the block material used for the cushion body of the comparative example 1, the hole part is formed similarly to the block material of an Example. In Comparative Example 2, a block material having a size of 166 mm in width, 166 mm in length, and 60 mm in thickness is used as it is without being bent or processed.

  The compression deflection load test was performed based on the JIS K6400-2 B method. In the example and the comparative example 1, the four cushion bodies 20 are arranged in two rows and two columns in a posture in which the curved axis is set up (a posture in which the short sides of the block material are vertically aligned), and the center of the upper end surface is a disc of φ200 To 75%. That is, the vertical dimension of the block material 22 (24) in FIG. 8 is the initial height. In Comparative Example 2, one block material was placed in a posture in which the thickness direction was vertically aligned, and the center of the upper end surface of the block material was compressed to 75% with a disk of φ200. That is, in Comparative Example 2, the thickness of the block material is the initial height. In the compression deflection test, preliminary compression is not performed. FIG. 10 shows the relationship between the deflection amount (%) and the load (N) for each of the examples and comparative examples 1 and 2. Further, for each of the examples and comparative examples 1 and 2, the hysteresis loss rate (the inner area of the compression / release curve / the area sandwiched between the lower side of the compression curve and the X axis) is based on JIS K6400-2. Calculated. The results are shown in Table 1.

  As shown in FIG. 10, in Example 1 and Comparative Example 1, the load immediately after the start of compression (deflection amount: 0 to 20%) is lower than that in Comparative Example 2, and appropriate cushions that receive the load softly at the initial stage of load input. It can be seen that it has characteristics. In addition, Example 1 has an appropriate cushion characteristic such that the load becomes higher than that of Comparative Example 1 when the deflection amount exceeds 20%, and the load is received as the input of the load proceeds. I understand. As described above, the cushion body 20 of the example exhibits excellent cushion characteristics as compared with the comparative example 1 at a stage where the compression is performed to some extent, and is suitable for supporting a relatively high load. Further, as shown in Table 1, the example has a lower hysteresis loss rate than the comparative examples 1 and 2, and the cushion body 20 of the example quickly returns to its original shape when the compressed load is released. It can be confirmed that the restoring force is excellent.

(Example of change)
The present invention is not limited to the above-described embodiment, and can be modified as follows.
(1) Although the same block material was used in the examples, block materials having different physical properties such as a compression deflection load may be combined. Moreover, you may combine the block material which consists of a different resin foam.
(2) In the embodiment, the slit-shaped hole is provided in the block body, but it may be a circular or rectangular opening. Even in this case, the hole provided in the portion corresponding to the curved portion is expanded in the circumferential direction by bending the block material.
(3) The hole is not limited to the configuration provided in the entire block body, and may be provided at least in a portion corresponding to the bending portion. Moreover, the structure which obstruct | occludes in the middle of the thickness direction of a block material may be sufficient as long as the hole part is connected to the outer peripheral surface side.
(4) The block member may be provided with a groove formed so as to be recessed in the outer peripheral surface of the curved portion and extending along the circumferential direction of the curved portion. The curved part is inclined as the edge on the outer peripheral surface side is pulled by the difference in peripheral length from the inner peripheral surface side to the outer peripheral surface side, and the end surface is inclined from the inner peripheral surface side to the outer peripheral surface side. The pulling of the edge on the outer peripheral surface side can be suppressed, and the end surface of the curved portion can also be formed horizontally in alignment with the end surface of the opposing piece portion.

22 1st block material (block material), 24 1st opposing piece part (opposing piece part),
26 1st curved part (curved part), 32 2nd block material (block material),
34 2nd opposing piece part (opposing piece part), 36 2nd bending part (curving part), 40 hole part

Claims (4)

Consists of two block materials formed of a resin foam having elasticity in a rectangular parallelepiped shape,
One of the pair of second opposing piece portions that are formed by facing the second block material between the pair of first opposing piece portions that are formed by facing the first block material. And sandwiching one of the first opposing piece parts between a pair of second opposing piece parts, and joining the clamping parts together,
The block material is provided with a hole portion that leads to at least a surface on the outer peripheral surface side of the curve corresponding to the curved portion that is curved by connecting the pair of opposed pieces, and the bending of the block material A cushion body, wherein the hole portion is configured to open on the outer peripheral surface of the curved portion.   The cushion body according to claim 1, wherein the hole portion is formed so as to communicate with the inside and outside of the bending of the block material.   The said hole part is formed in the slit shape extended along the curve axis direction of the said block material, and the bending direction outer side in this hole part is expanded in a curve part by the curve of this block material. The cushion body described.   The said two block materials are set to the magnitude | size of the bending axis direction of the said bending part, and the side surface which cross | intersects this bending axis direction is mutually aligned, and it joins to any one of Claims 1-3. The cushion body described.

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