Mattress

Abstract

To provide a mattress that can be formed in a double-stacked form and a triple-stacked form.SOLUTION: A mattress 1 includes four mats 10 and a connection part 6 that connects adjacent mats 10. A direction in which the mats 10 continue by the connection part 6 is a longitudinal direction. In a thickness direction, one side is a first side and the other side is a second side. In the longitudinal direction, the mat 10 includes two long mats 10a and two short mats 10b having different lengths. The long mats 10a is twice as long as the short mat 10b.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a mattress that can be double- or triple-stacked. [Background technology]

[0002] Conventionally, mattresses or futons have been proposed in which multiple mats are connected, and are expanded when in use, and folded at the connecting parts when stored to a size that is easy to store. For example, according to the description in Patent Document 1, a conventional futon is characterized in that a cloth-like futon shell is filled with a plate-shaped core body that has an appropriate thickness and cushioning properties and a predetermined shape retention, and a filling body made of futon cotton of an appropriate thickness is layered on top of the core body, and the four are divided into four in the front-back direction and arranged in parallel, and the front and back surfaces of the divided parts are alternately connected.

[0003] The futon has a top layer of batting and a bottom layer of a core, with the batting having sufficient moisture absorption properties to function as a stuffed futon, and the core providing shape retention and cushioning properties to function as a mattress, so that a single futon has the same effect as a stuffed futon and a mattress layered on top of each other.

[0004] Furthermore, by adopting a four-fold structure and the shape retention of the core body, the four-fold state is stably maintained without the need for anti-disorganization bands, meaning that the product can be stored in a closet either horizontally or vertically.

[0005] According to this, the futon mattress described in Patent Document 1 has the same function as a cotton-stuffed futon and a mattress layered on top of each other, which simplifies the process of lifting and lowering the futon. It also has the ability to fold and retain its shape when stored, so it can be easily stored in an empty space inside a closet without being limited to a specific location, making storage easy. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Utility model registration No. 3157167 Summary of the Invention [Problem to be solved by the invention]

[0007] However, the conventional example shown in Patent Document 1 has the following problems. Mattresses or futons may be folded in two simply to secure space in a bedroom, for example. Furthermore, they may be folded in multiple layers for storage. Various sizes of storage spaces are assumed, but there may be limitations on the storage size in the height direction. The conventional example described in Patent Document 1 adopts a four-fold configuration, so it is possible to fold it in two or four when storing it, but it is assumed to fold it in four to make it compact. In this case, it is assumed that the mattress or the like has a certain thickness to improve cushioning, and if it is folded in four and put into four layers, the thickness becomes four times larger. When trying to stack multiple mattresses or futons in one storage space, it is assumed that the problem is that the number of sheets you want to store cannot be stored due to the height limit. Therefore, a mattress or the like that can be formed into a form that can be simply stacked in two layers and a form that can be stacked in three layers in which the thickness is kept within a certain range even when stored is desired.

[0008] The present invention is devised to solve the problems of the conventional art, and has an object to provide a mattress that can be formed into a two-tiered or three-tiered configuration. [Means for solving the problem]

[0009] A mattress according to one embodiment of the present invention comprises four mats and connecting parts connecting adjacent mats, the direction in which the mats are joined by the connecting parts being the longitudinal direction, and in the longitudinal direction, the mattress comprises two long mats and two short mats of different lengths, the long mats being twice as long as the short mats.

[0010] According to this, the mattress comprises two long mats and two short mats, the long mats being twice as long as the short mats. Therefore, a combination of long and short mats can be stacked in two tiers, and three tiers can be stacked by forming each tier with only long and short mats. Furthermore, the longitudinal length of each tier can be made uniform.

[0011] In addition, the mats are connected non-detachably by the connecting parts, the long mats are arranged at both ends in the longitudinal direction, and two short mats connected in the longitudinal direction are arranged sandwiched between the long mats, with one short mat being connected to the same side in the thickness direction and the other short mat being connected to a different side in the thickness direction.

[0012] In this case, the mats are connected irremovably by the connection parts, so they can be folded at the connection parts without being separated from each other. Also, since long mats are arranged at both ends in the longitudinal direction and two short mats connected in the longitudinal direction are arranged sandwiched between the long mats, two-tier stacking is possible with the connection parts between the short mats as boundaries. Furthermore, three-tier stacking is possible with the connection parts between the long mats and the short mats at both ends in the longitudinal direction as boundaries.

[0013] In addition, at least one of the mats may be formed so that adjacent mats can be detached from each other at at least one of the connecting parts. In this case, the mattress can be used independently of the multiple mats separated from each other. Furthermore, since multiple two- or three-tier configurations can be formed, it can be set according to the usage situation.

[0014] The mat may also have a first urethane layer and a second urethane layer formed by overlapping each other in the thickness direction, and the first urethane layer and the second urethane layer may have different hardness and / or resilience coefficient and may be detachable by changing the side.

[0015] In this case, the mattress has a removable connection part where the stacking order of the first urethane layer and the second urethane layer in the thickness direction of the mat can be set arbitrarily, allowing the user to change the stacking order in the longitudinal direction depending on the part of the body. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a perspective view showing a mattress 1 of the present invention in an expanded state, showing a mattress 1a of a first embodiment as an example. [Diagram 2] With respect to FIG. 1, the mats 10 adjacent the joint 6 are shown folded towards each other. [Diagram 3] This shows a mattress 1a of the first embodiment of the present invention, in a cross-sectional view cut along the longitudinal direction, where (a) shows the case where the first side is entirely made of the first urethane layer 2 and the second side is entirely made of the second urethane layer 3, and (b) shows the case where the first urethane layers 2 and the second urethane layers 3 are arranged alternately in the longitudinal and thickness directions. [Figure 4] This figure shows the change in state when the first mat 11 and the second mat 12 are folded at the second connection part 6b from the state in Figure 3(a) to stack them in two layers, where (a) shows the intermediate state and (b) shows the stacked state. [Diagram 5] This figure shows the change in state when the first mat 11 is folded at the first connecting part 6a and the fourth mat 14 is folded at the third connecting part 6c from the state in Figure 3(a) to stack them in three layers, where (a) shows the state in the middle and (b) shows the state after stacking them in three layers. [Figure 6] The mattress 1 in FIG. 1 is shown covered with a quilted pad 20 . [Figure 7] This shows a change in state from the state in Figure 6, in which the mattress 1 covered with the quilt pad 20 is folded toward the first side at the second connection portion 6b and stacked in two layers, (a) shows the intermediate state, and (b) shows the stacked state. [Figure 8]FIG. 1B is a cross-sectional view taken along the longitudinal direction of a mattress 1b according to a second embodiment of the present invention, in which (a) shows that the first side of the mat 10 is entirely made of the first urethane layer 2, and (b) shows that the third mat 13 and the fourth mat 14 are turned over and the first sides of the third mat 13 and the fourth mat 14 are made of the second urethane layer 3 compared to (a). [Figure 9] Figure 8(a) shows two changes in state when the mattresses 1b are stacked in two layers, (a) shows a state in which the first side of the second connecting portion 6b is connected, and shows a state in which the third mat 13 and the fourth mat 14 are in the middle of being folded, and a state in which they are stacked in two layers, and (b) shows a state in which the second connecting portion 6b is separated, and shows a state in which the third mat 13 and the fourth mat 14 are simply stacked on top of the first mat 11 and the second mat 12, and a state in which they are stacked in two layers. [Figure 10] This shows the change in state when mattresses 1b are stacked in three layers, starting from the separated state at the second connection part 6b in Figure 8(a), where (a) shows the intermediate state in which the second mat 12 is folded at the first connection part 6a relative to the first mat 11 and the third mat 13 is folded at the third connection part 6c relative to the fourth mat 14, and (b) shows the three-layer stacked state. [Figure 11] FIG. 1C is a cross-sectional view taken along the longitudinal direction of a mattress 1c according to a third embodiment of the present invention, in which (a) shows the mattress in an extended state, (b) shows the mattress in a two-layer stacked state, and (c) shows the mattress in a three-layer stacked state. [Figure 12] FIG. 1C is a cross-sectional view taken along the longitudinal direction of a mattress 1d according to a fourth embodiment of the present invention, in which (a) shows the mattress in an extended state, (b) shows the mattress in a two-layer stacked state, and (c) shows the mattress in a three-layer stacked state. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, a mattress 1 embodying the present invention will be described with reference to the drawings. The description of the embodiment of the invention and the drawings to which reference is made are used to explain technical features that may be adopted by the present invention. The present invention is not limited thereto. The configuration of the device shown in the drawings is merely an illustrative example and is not intended to be limiting.

[0018] <Configuration common to all embodiments> A description will be given of the configuration common to all embodiments of the mattress 1 according to this aspect of the present invention. As shown in Fig. 1 etc., the mattress 1 comprises four mats 10 and a connection portion 6 that connects adjacent mats 10 to each other. The direction in which the mats 10 are joined by the connection portions 6 is defined as the longitudinal direction. In addition, in the thickness direction, one side is defined as the first side, and the other side is defined as the second side. In the longitudinal direction, the mat 10 comprises two long mats 10a and two short mats 10b of different lengths. The long mats 10a are twice as long as the short mats 10b.

[0019] Specifically, as shown in FIG. 1, the length of all the mats 10 arranged in a plane with the joints 6 in between is defined as the total length L. The length L1 of the long mat 10a is 1 / 3 of the total length L. The length L2 of the short mat 10b is 1 / 6 of the total length L. As shown in the examples of FIG. 4, FIG. 5, and FIG. 10 to FIG. 12, the mats 10 can be stacked in two or three tiers with the joints 6 formed at least at one end in the longitudinal direction. As shown in FIG. 4, FIG. 9, FIG. 11(b), and FIG. 12(b), when stacked in two tiers, each tier is formed by a combination of the long mat 10a and the short mat 10b. As shown in FIG. 5, FIG. 10, FIG. 11(c), and FIG. 12(c), when stacked in three tiers, one tier is formed only by the short mat 10b, and the other two tiers are formed only by the long mat 10a. When stacked in two or three tiers, the positions of both ends in the longitudinal direction can be aligned.

[0020] Also, as shown in Figure 4, when the mats 10 are connected by the connecting portions 6, long mats 10a may be arranged at both ends in the longitudinal direction, and two short mats 10b connected in the longitudinal direction may be arranged sandwiched between the long mats 10a.

[0021] As shown in Figs. 6 and 7, the mattress 1 includes a quilt pad 20 that covers part of the outer periphery of the four mats 10. The quilt pad 20 covers the entire surface of a first side, which is one side of the mats 10 in the thickness direction. Furthermore, of the mats 10 arranged at both ends in the longitudinal direction, it covers part of the ends in the width direction and part of a second side opposite the first side. The mattress 1 can be valley-folded on the first side while covering the mats 10. The quilt pad 20 is formed, for example, from 100% polyester cotton, or 50% wool and 50% polyester.

[0022] As shown in Fig. 6 and Fig. 7, when the quilt pad 20 is attached to the mattress 1, one end 20a in the longitudinal direction of the quilt pad 20 is located in the middle of the first mat 11, and the other end 20a is located in the middle of the fourth mat 14. Fig. 7 shows how the mattress 1 with the quilt pad 20 attached is folded in two stages. As shown in Fig. 7, the mattress 1 with the quilt pad 20 attached can be changed from the state shown in Fig. 7(a) to the state shown in Fig. 7(b) by folding at the second connection part 6b. Fig. 7(b) shows the state where the mattresses are stacked in two stages, with the third mat 13 and the fourth mat 14 raised by the thickness of the quilt pad 20.

[0023] Here, the left end in the longitudinal direction is labeled with the symbol a, and the right end is labeled with the symbol b. For example, end 11a is the left end of the first mat 11, and end 14b is the right end of the fourth mat 14. The same applies to mattresses 1b of the second embodiment to mattresses 1d of the fourth embodiment described below.

[0024] Although not shown, the mattress 1 to which the quilt pad 20 is attached can be folded at the first connecting portion 6a to be stacked in two layers. In this case, the end portion 20a of the quilt pad 20 is located in the middle of the first mat 11 in the longitudinal direction, so folding at the first connecting portion 6a is possible. In the state where the mattresses are stacked in two layers, the area occupied by the mattress 1 after folding is larger than that in the case of FIG. 7(b), but it is possible to temporarily secure space or to use the first mat 11 as a pillow or armrest. The quilt pad 20 described above has been described using the mattress 1a of the first embodiment described later as an example, but is not limited thereto and can also be applied to the mattresses 1b of the second embodiment to the mattresses 1d of the fourth embodiment.

[0025] 3, the mat 10 includes a first urethane layer 2 and a second urethane layer 3 formed to overlap each other in the thickness direction. The first urethane layer 2 and the second urethane layer 3 have different hardness and / or resilience coefficient. For example, the first urethane layer 2 has a density of 45 kg / m 3 The second urethane layer 3 has a hardness of 156.9 N, a resilience of 45% or more, a compression set of 4.5% or less, and a repeated compression set of 2.5% or less. 3 The hardness is 200N, the resilience modulus is 30% or more, the compression set is 5% or less, and the repeated compression set is 5% or less. The density measurements are based on the measurement standard JIS K 7222. The hardness measurements are based on the measurement standard JIS K 6400-2D method (25% compression). The resilience modulus measurements are based on the measurement standard JIS K 6400-3. The compression set measurements and repeated compression set measurements are based on the measurement standard JIS K 6400-4.

[0026] In the example shown in Fig. 3(a), the first side of the mat 10 is entirely the first urethane layer 2, and the second side is entirely the second urethane layer 3. In the example shown in Fig. 3(b), the first sides of the first mat 11 and the third mat 13 are the first urethane layer 2, and the first sides of the second mat 12 and the fourth mat 14 are the second urethane layer 3. The second sides of the first mat 11 and the third mat 13 are the second urethane layer 3, and the second sides of the second mat 12 and the fourth mat 14 are the first urethane layer 2. Fig. 3 shows only one example, and it is possible to arbitrarily set whether the first urethane layer 2 and the second urethane layer 3 are on the first side or the second side.

[0027] 1, 3, etc., the mat 10 is stored in a storage section 40 of a bag body 4. The shape of the bag body 4 differs depending on the embodiment, and will be described in detail later.

[0028] <Effects of the configuration common to all embodiments> The configuration common to all the embodiments of the mattress 1 described above provides the following effects. As shown in Fig. 1 etc., the mattress 1 comprises two long mats 10a and two short mats 10b, with the long mats 10a being twice as long as the short mats 10b. Therefore, as shown in Fig. 4 etc., the mattress can be stacked in two layers, with each layer consisting of a combination of the long mats 10a and the short mats 10b. Furthermore, by forming each layer only with the long mats 10a and the short mats 10b, it is possible to stack the mattress in three layers.

[0029] Therefore, the mattress 1 can be simply stacked in two layers to save space. When stored, the thickness dimension can be kept within a certain range of three times that when in use, making the surface area compact. Furthermore, as shown in FIG. 4, when stacked in two layers, each layer is formed by a combination of a long mat 10a and a short mat 10b. As shown in FIG. 5, when stacked in three layers, one layer is formed only by the short mat 10b, and the other two layers are formed only by the long mat 10a. Therefore, the longitudinal lengths of each layer can be aligned. When stacked in layers, the mattress 1 can be aligned at the positions of both ends in the longitudinal direction, making it look good and easy to handle.

[0030] As shown in Fig. 4, long mats 10a are arranged at both ends in the longitudinal direction, and two short mats 10b connected in the longitudinal direction are sandwiched between the long mats 10a. Thus, two-tier stacking is possible with the approximate center in the longitudinal direction as the boundary. Furthermore, three-tier stacking is possible by stacking the short mats 10b and the two long mats 10a on top of each other with the connecting portion 6 as the boundary. In other words, two-tier and three-tier stacking is possible with a simple operation.

[0031] In addition, since the first side of the mattress 1 can be folded in a valley shape while the mattress is covered with the quilt pad 20, the mattress can be folded from the stretched state and stacked in two layers without any trouble. Furthermore, the mattress can be stretched from the two-layer stacked state without any trouble while the quilt pad 20 is still covered and used.

[0032] <Configuration of the mattress 1a of the first embodiment> Next, a mattress 1a according to a first embodiment of the present invention will be described. As shown in Fig. 2 and Fig. 3, the mat 10 is connected to the connecting portion 6 so as not to be detachable. The mat 10 has a long mat 10a arranged at both ends in the longitudinal direction, and two short mats 10b arranged in the longitudinal direction, sandwiched between the long mats 10a. As shown in Fig. 3, the long mat 10a, short mat 10b, short mat 10b, and long mat 10a are arranged in this order from the left in the longitudinal direction.

[0033] In the mattress 1a, one short mat 10b is connected to the adjacent long mat 10a and short mat 10b on the same side in the thickness direction by the connection part 6 between them, and the other short mat 10b is connected to the adjacent long mat 10a on the different side in the thickness direction by the connection part 6 between them. In the example shown in FIG. 3, the first connection part 6a between the first mat 11, which is the long mat 10a, and the second mat 12, which is the short mat 10b, is formed on the first side. The third connection part 6c between the third mat 13, which is the short mat 10b, and the fourth mat 14, which is the long mat 10a, is formed on the second side. The second connection part 6b between the second mat 12 and the third mat 13, both of which are short mats 10b, is formed on the first side, but may be formed on the second side. As shown in FIG. 2, the mattress 1a is formed integrally with the first mat 11 to the fourth mat 14 connected by the connection part 6, and can be folded at the connection part 6. When in use, the first mat 11 to the fourth mat 14 are stretched so as to be flat as shown in FIG. 1.

[0034] In the example shown in FIG. 3 etc., the mattress 1 includes a bag body 4a. As shown in FIG. 1, the bag body 4a includes a storage section 40 that stores four mats 10 independently. The connection section 6 is formed by a part of the bag body 4a. The connection section 6 between the long mat 10a and the short mat 10b is formed at two locations spaced apart in the longitudinal direction and at the ends on different sides in the thickness direction. That is, in the example shown in FIG. 3, the first connection section 6a between the first mat 11 and the second mat 12 and the second connection section 6b between the second mat 12 and the third mat 13 are on the first side in the thickness direction. The third connection section 6c between the third mat 13 and the fourth mat 14 is on the second side in the thickness direction.

[0035] As shown in Fig. 1, the storage section 40 can be opened and closed by a fastener 5. The storage section 40 consists of four sections. The first mat 11 is stored independently in the first storage section 41, the second mat 12 in the second storage section 42, the third mat 13 in the third storage section 43, and the fourth mat 14 in the fourth storage section 44.

[0036] Although the example in which the connection portion 6 is formed by a part of the bag body 4a has been described, the present invention is not limited to this. For example, the connection portion 6 may be formed directly on the mat 10. In this case, the bag body 4a may be omitted, or the storage portion 40 may be a single bag body 4a.

[0037] Next, with reference to Fig. 4, a case where the mattresses 1a are stacked in two layers will be described. When stacking in two layers, the third mat 13 and the fourth mat 14 are folded at the second connection portion 6b as shown in Fig. 4(a). In the two-layer stacked state, as shown in Fig. 4(b), the first sides of the first mat 11 and the second mat 12 are in contact with the first sides of the third mat 13 and the fourth mat 14. At this time, the end 11a of the first mat 11 and the end 14b of the fourth mat 14 are aligned in the thickness direction.

[0038] Next, a case where the mattresses 1a are stacked in three layers will be described with reference to Fig. 5. When stacking in three layers, as shown in Fig. 5(a), the first mat 11 is folded at the first connecting portion 6a so that a first side of the first mat 11 contacts a first side of the second mat 12. Also, the fourth mat 14 is folded at the third connecting portion 6c so that a second side of the fourth mat 14 contacts a second side of the third mat 13.

[0039] 5(b), when the mattresses 1a are stacked in three layers, the end 11b of the first mat 11, the end 12a of the second mat 12, and the end 14b of the fourth mat 14 are aligned in the thickness direction on the left side of the figure in the longitudinal direction, while the end 11a of the first mat 11, the end 13b of the third mat 13, and the end 14a of the fourth mat 14 are aligned in the thickness direction on the right side of the figure.

[0040] <Effects of the configuration of the mattress 1a of the first embodiment> The configuration of the mattress 1a of the first embodiment described above provides the following effects. The mats 10 of the mattress 1 are connected non-detachably by the connection parts 6, and therefore can be folded at the connection parts 6 without being separated from each other. Furthermore, the long mats 10a are arranged at both ends in the longitudinal direction, and two short mats 10b connected in the longitudinal direction are arranged sandwiched between the long mats 10a, so that two layers can be stacked with the second connection part 6b between the short mats 10b as the boundary. Furthermore, three layers can be stacked with the first connection part 6a and the third connection part 6c between the long mats 10a and the short mats 10b at both ends in the longitudinal direction as the boundary.

[0041] In addition, the mattress 1 has four mats 10 stored independently in the storage section 40 of the bag body 4a, and the connection section 6 is formed by a part of the bag body 4a. Therefore, the mats 10 can be easily folded and stacked at the connection section 6. Furthermore, the first connection section 6a and the third connection section 6c between the long mat 10a and the short mat 10b are formed on different sides in the thickness direction. Therefore, the two long mats 10a can be stacked in three layers by folding them in different directions at the first connection section 6a and the third connection section 6c.

[0042] <Configuration common to mattress 1b of second embodiment to mattress 1d of fourth embodiment> Next, a description will be given of the configuration common to the mattress 1b of the second embodiment to the mattress 1d of the fourth embodiment according to the present invention. As shown in Fig. 8 to Fig. 12, the mat 10 is formed such that at least one of the connection parts 6 allows adjacent mats 10 to be detachably attached to each other.

[0043] As already explained, the mat 10 includes the first urethane layer 2 and the second urethane layer 3 which are overlapped in the thickness direction. In the mattresses 1a of the second embodiment to 1d of the fourth embodiment, the first urethane layer 2 and the second urethane layer 3 have different hardness and / or resilience coefficients and can be attached and detached by changing the sides. Details will be described later for each embodiment.

[0044] <Effects of the configuration common to the mattress 1b of the second embodiment to the mattress 1d of the fourth embodiment> The above-described common configuration of the mattress 1b of the second embodiment to the mattress 1d of the fourth embodiment provides the following effects. As shown in Fig. 8 and other figures, the mattress 1 is such that adjacent mats 10 can be detached from each other at at least one of the connection parts 6, so that the multiple separated mats 10 can be used independently. Furthermore, multiple two- or three-tier configurations can be formed, so the user can set it according to the usage situation.

[0045] 8 and other figures, the mattress 1 allows the stacking order of the first urethane layer 2 and the second urethane layer 3 in the thickness direction of the mat 10 to be set arbitrarily at the detachable connection part 6. Thus, the user can change the stacking order in the longitudinal direction according to the part of the body.

[0046] <Configuration of mattress 1b of second embodiment> Next, a mattress 1b of a second embodiment will be described with reference to Figures 8 to 10. In the mattress 1b, a first connection 6a between the first mat 11, which is the long mat 10a, and the second mat 12, which is the short mat 10b, is formed so as to be undetachable, and a third connection 6c between the third mat 13, which is the short mat 10b, and the fourth mat 14, which is the long mat 10a, is formed so as to be undetachable. Furthermore, a second connection 6b between the second mat 12 and the third mat 13 is formed so as to be detachable.

[0047] 8, in the mattress 1b, the first mat 11 and the second mat 12, and the third mat 13 and the fourth mat 14 are stored independently in their respective bags 4b. The first connecting portion 6a and the third connecting portion 6c are each formed by a part of the bag 4b. In addition, the second connecting portion 6b is provided with hook-and-loop fasteners 7 near the first side end and the second side end of the end portion 12b of the second mat 12 and the end portion 13a of the third mat 13, respectively.

[0048] As shown in Fig. 8, the mattress 1b is detachable at the second connecting portion 6b as indicated by the arrow. The end portion 11a of the first mat 11 and the end portion 14b of the fourth mat 14 are each provided with a hook-and-loop fastener 7 that can be used as the connecting portion 6. When in use, the second mat 12 and the third mat 13 are connected at the second connecting portion 6b. Alternatively, the end portion 11a of the first mat 11 and the end portion 14b of the fourth mat 14 may be connected.

[0049] In addition, in the second connecting portion 6b, the third mat 13 and the fourth mat 14 can be turned over from the state shown in Fig. 8(a) to the state shown in Fig. 8(b). That is, in the example shown in Fig. 8(b), the first side of the first mat 11 and the second mat 12 is the first urethane layer 2, and the first side of the third mat 13 and the fourth mat 14 is the second urethane layer 3. Note that the second connecting portion 6b is not limited to the hook-and-loop fastener 7, and may be, for example, a snap button, a hook-and-loop fastener, or any other detachable member. The same applies to the mattress 1c of the third embodiment and the mattress 1d of the fourth embodiment.

[0050] Next, a case where the mattresses 1b are stacked in two layers will be described. As shown in FIG. 9, there is a method of stacking the mattresses in two layers with the second connecting parts 6b connected, and a method of stacking the mattresses in two layers with the second connecting parts 6b separated. FIG. 9(a) shows a case where the third mat 13 and the fourth mat 14 are folded to the first side with the second connecting parts 6b connected near the first side end. Note that while the example in FIG. 9(a) shows an example where the third mat 13 and the fourth mat 14 are folded to the first side, it is also possible to fold them to the second side with the second connecting parts 6b connected near the second side end.

[0051] Fig. 9(b) shows an example in which the second mat 12 and the third mat 13 are stacked in two layers while being separated at the second connecting portion 6b. Fig. 9(b) shows an example in which the third mat 13 and the fourth mat 14 are stacked in two layers on the first side of the first mat 11 and the second mat 12, but the first side and the second side may be interchanged. In addition, in the two-layer stacked state, the end of the first side can be either the first urethane layer 2 or the second urethane layer 3, and the end of the second side can be either the first urethane layer 2 or the second urethane layer 3.

[0052] Next, a case where the mattresses 1b are stacked in three layers will be described. As shown in Fig. 10(a), the second mat 12 is folded at the first connecting portion 6a so that a first side of the second mat 12 contacts the first side of the first mat 11. The third mat 13 is folded at the third connecting portion 6c so that a second side of the third mat 13 contacts the second side of the fourth mat 14. The second mat 12 and the third mat 13 are stacked in three layers while being connected to each other by the hook-and-loop fastener 7.

[0053] 10(b), when the mattresses 1b are stacked in three layers, the end 11a of the first mat 11, the end 13b of the third mat 13, and the end 14a of the fourth mat 14 are aligned in the thickness direction on the left side of the figure in the longitudinal direction, and the end 11b of the first mat 11, the end 12a of the second mat 12, and the end 14b of the fourth mat 14 are aligned in the thickness direction on the right side of the figure.

[0054] <Effects of the configuration of the mattress 1b of the second embodiment> According to the configuration of the mattress 1b of the second embodiment described above, in addition to the effects of the configuration common to all the embodiments already described, the following effects are obtained. As shown in FIG. 8, the mattress 1b can be divided into two equal lengths in the longitudinal direction. The first mat 11 and the second mat 12, and the third mat 13 and the fourth mat 14 in the divided state can be used independently. Alternatively, the mattress 1b can be stored in a divided state. Also, as shown in FIG. 8, instead of connecting the second mat 12 of the short mat 10b and the third mat 13 of the short mat 10b, the first mat 11 of the long mat 10a and the fourth mat 14 of the long mat 10a can be connected. In this way, by changing the position of the connecting portion 6 used for connection, the order of the long mat 10a and the short mat 10b in the longitudinal direction can be changed. Therefore, the user can set the order of the long mat 10a and the short mat 10b according to the purpose of use.

[0055] <Configuration of mattress 1c of third embodiment> Next, a mattress 1c of a third embodiment will be described with reference to Fig. 11. As shown in Fig. 11(a), in the mattress 1c, the first mat 11, which is a long mat 10a, and the second mat 12 are detachable at the first connecting portion 6a, and the second connecting portion 6b and the third connecting portion 6c are not detachable. The second mat 12 and the third mat 13, and the third mat 13 and the fourth mat 14 are connected on different sides in the thickness direction. In the example shown in Fig. 11(a), the second connecting portion 6b is on the first side, and the third connecting portion 6c is on the second side.

[0056] As shown in FIG. 11, the first mat 11 is stored alone in one bag body 4c, and the second mat 12 to the fourth mat 14 are stored independently in the other bag body 4c. The second connecting portion 6b and the third connecting portion 6c are formed by a part of the other bag body 4c. In the example shown in FIG. 11, the second connecting portion 6b and the third connecting portion 6c are connected to different sides in the thickness direction, but may be connected to the same side. The first connecting portion 6a is provided with hook-and-loop fasteners 7 near the first side end and the second side end of the end portion 11b of the first mat 11 and the end portion 12a of the second mat 12. The end portion 11a of the first mat 11 and the end portion 14b of the fourth mat 14 are provided with hook-and-loop fasteners 7 that can be used as the connecting portion 6.

[0057] As shown in FIG. 11, the mattress 1c is detachable at the first connecting portion 6a as shown by the arrow. When in use, the first mat 11 and the second mat 12 are connected at the first connecting portion 6a. Alternatively, the end portion 11a of the first mat 11 and the end portion 14b of the fourth mat 14 may be connected. In the example shown in FIG. 11(a), the first side of the mat 10 is entirely the first urethane layer 2, and the second side is entirely the second urethane layer 3. At the first connecting portion 6a, the first mat 11 can be turned over from the state shown in FIG. 11(a). In this case, the first side of the first mat 11 is the second urethane layer 3, and the first sides of the second mat 12 to the fourth mat 14 are the first urethane layer 2.

[0058] Next, a case where the mattresses 1c are stacked in two layers will be described. As shown in FIG. 11(b), the first mat 11 and the second mat 12 are connected at the first connecting portion 6a. At the second connecting portion 6b, the third mat 13 is folded so that the first side of the third mat 13 contacts the first side of the second mat 12. As shown in FIG. 11(b), when the mattresses 1c are stacked in two layers, the end 11a of the first mat 11 and the end 14b of the fourth mat 14 are aligned in the thickness direction on the left side of the figure. On the right side of the figure, the end 12b of the second mat 12 and the end 13a of the third mat 13 are aligned in the thickness direction.

[0059] Next, a case where the mattresses 1c are stacked in three layers will be described. As shown in Fig. 11(c), the mattresses are folded at the third connecting portion 6c so that the second side of the fourth mat 14 comes into contact with the second side of the third mat 13. As shown in Fig. 11(c), when stacking in three layers, the first mat 11 may be stacked on the first side of the second mat 12 and the third mat 13, or may be placed on the second side of the fourth mat 14. Alternatively, although not shown, the first mat 11 may be placed on the first side of the fourth mat 14 or on the second side of the second mat 12 and the third mat 13 by changing the faces of the second mat 12 and the third mat 13 and the fourth mat 14 in the thickness direction.

[0060] In addition, the mattress 1c has a long mat 10a that can be attached and detached separately, and the other mattresses have one long mat 10a and two short mats 10b that cannot be attached and detached. It may be removable.

[0061] <Effects of the configuration of the mattress 1c of the third embodiment> According to the configuration of the mattress 1c of the third embodiment described above, in addition to the effects of the configuration common to all the embodiments already described, the following effects are obtained. The mattress 1c can be used independently in a divided state, like the mattress 1b. Alternatively, it can be stored in a divided state. Also, as in the example shown in FIG. 11, the first mat 11, which is the long mat 10a, can be connected to the fourth mat 14 of the long mat 10a instead of being connected to the second mat 12 of the short mat 10b. In this way, by changing the connecting part 6 used for the connection, the order of the long mat 10a and the short mat 10b in the longitudinal direction can be changed. Therefore, the user can set the order of the long mat 10a and the short mat 10b according to the purpose of use.

[0062] <Configuration of mattress 1d according to the fourth embodiment> Next, a mattress 1d of a fourth embodiment will be described with reference to Fig. 12. The mattress 1d has four mats 10 that are detachable from one another. The end 11a and end 11b of the first mat 11 are each provided with a hook-and-loop fastener 7 that can be used as a connecting portion 6. Similarly, the second mat 12 to the fourth mat 14 are each provided with a hook-and-loop fastener 7 at their end. For example, the hook-and-loop fastener 7 is formed over the entire end of each mat 10 in the thickness direction. In the example shown in Fig. 12, each mat 10 of the mattress 1d is individually stored in a bag body 4d.

[0063] FIG. 12(a) is a diagram showing the first mat 11 to the fourth mat 14 arranged in the same order as the mattress 1a of the first embodiment. In FIG. 12(a), the first side of each mat 10 is the first urethane layer 2, and the second side is the second urethane layer 3. It is also possible to change the faces of the first mat 11, the third mat 13, and the fourth mat 14 so that the first side is the second urethane layer 3. In the mattress 1d, the arrangement order of the long mat 10a and the short mat 10b can be set arbitrarily. For example, as shown in FIG. 12(a), the arrangement order of the first mat 11 to the fourth mat 14 can be the long mat 10a, the short mat 10b, the long mat 10a, and the short mat 10b. In addition, although not shown, the arrangement order of the first mat 11 to the fourth mat 14 can be the short mat 10b, the long mat 10a, the long mat 10a, and the short mat 10b.

[0064] Next, a case where the mattress 1d is stacked in two layers will be described. Since the mattress 1d can be arranged in any order, the reference numerals for the first mat 11 to the fourth mat 14, as named for the mattresses 1a to 1c, are omitted in Fig. 12(b) and Fig. 12(c). There are cases where the mattress 1d is stacked in two layers. In either case, each layer has one long mat 10a and one short mat 10b. As shown in Fig. 12(a), the long mat 10a and the short mat 10b are alternated in the thickness direction, and, although not shown, the long mat 10a and the short mat 10b are arranged side by side in the thickness direction.

[0065] Next, a case where mattresses 1d are stacked in three layers will be described. As shown in FIG. 12(c), there are several cases where mattresses 1d can be stacked in three layers. In any case, one of the three layers is a combination of short mats 10b and short mats 10b, and the other two layers are long mats 10a. FIG. 12(c) shows a case where the combination of short mats 10b is in the middle layer, but the combination of short mats 10b may also be in the lower layer or the upper layer. The short mats 10b are connected to each other by hook-and-loop fasteners 7.

[0066] <Effects of the configuration of the mattress 1d according to the fourth embodiment> The configuration of the mattress 1d of the fourth embodiment described above provides the following effects in addition to the effects of the configuration common to all the embodiments already described. As shown in FIG. 12, in the mattress 1d, all the mats 10 are detachable from each other. Therefore, the first mat 11 to the fourth mat 14 can be used independently in a divided state. Alternatively, any of the four mats 10 can be arbitrarily selected and used in combination with a plurality of mats 10. Similarly, the mats can be stored individually in a divided state. Alternatively, a plurality of mats 10 can be arbitrarily combined and stored. [Explanation of symbols]

[0067] 1, 1a, 1b, 1c, 1d Mattress 2. First urethane layer 3 Second urethane layer 6 Connection 10. Matt 10a long mat 10b Short Mat 11a, 11b, 12a, 12b, 13a, 13b, 14a, 14b End 20a: End

Claims

1. Four mats and A connecting portion is provided for connecting adjacent mats to each other, The direction in which the mats are connected by the connecting portion is defined as a longitudinal direction, In the longitudinal direction, Equipped with two long mats and two short mats of different lengths, The long mat is twice as long as the short mat.

2. The mat is connected in an inseparably manner by the connecting portion, The long mat is disposed at both ends in the longitudinal direction, The mattress of claim 1, wherein two short mats connected in the longitudinal direction are sandwiched between the long mats, one of the short mats being connected to the same side in the thickness direction and the other of the short mats being connected to a different side in the thickness direction.

3. The mat is The mattress according to claim 1 , wherein at least one of the connecting portions is formed so that adjacent mats can be detachably attached to each other.

4. The mat includes a first urethane layer and a second urethane layer formed by overlapping each other in a thickness direction, The mattress according to claim 3 , wherein the first urethane layer and the second urethane layer have different hardness and / or resilience coefficients and are detachable with the opposite sides.

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