JP6737444B1 - Sofa and mattress - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sofa-combined mattress capable of improving sitting comfort when used as a sofa. SOLUTION: The sofa-mattress 10 of the first aspect is a joining means for detachably joining a flexible plate-shaped main body portion 14 and a first peripheral edge portion 16 and a second peripheral edge portion 18 of the main body portion 14. 20 and 20 are provided. The joining means 20 has a first element 40 of the fastener serving as the first joining portion 34 and a second element 44 of the fastener serving as the second joining portion 36. When the first element 40 and the second element 44 are engaged with each other and the first peripheral edge portion 16 and the second peripheral edge portion 18 are joined to each other, the main body portion 14 is bent at a plurality of locations and protrudes outward. The hollow polyhedron three-dimensional object 12 having the protruding portion 70 is configured. When the protrusion 70 is pushed into the internal space S of the three-dimensional object 12, the sofa-mattress 10 of the second aspect having the seat 50 is configured. [Selection diagram] Figure 1

Description

TECHNICAL FIELD The present invention relates to a sofa-compatible mattress which can selectively take a first mode used as a sofa and a second mode used as a mattress.

The mattress used for sleeping by the user becomes unnecessary when the user wakes up, so if the mattress can also be used as a sofa, the indoor space can be effectively used. From such a point of view, various types of sofa-combined mattresses have been conventionally developed. The roll-up type sofa mattress disclosed in Patent Document 1 is an example of the sofa-combined mattress, and becomes a mattress when a plurality of pad blocks having cushioning properties are arranged in a flat plate shape, and the plurality of pad blocks are overlapped with each other. It is configured to become a sofa when combined.

Utility model registration No. 3223774

However, the roll-up type sofa mattress disclosed in Patent Document 1 has a problem that when the pad is used as a sofa, the flat upper surface of the pad block directly serves as a seating surface, which makes the seating comfort uncomfortable.

The present invention has been made to solve the above problem, and an object of the present invention is to provide a sofa-combined mattress that can improve the sitting comfort when used as a sofa.

To achieve the above object, the sofa-mattress according to the present invention is characterized by a flexible plate-shaped main body portion, a first peripheral edge portion that is a part of an outer peripheral edge of the main body portion, and an outer portion of the main body portion. And a second joining portion for detachably joining the second joining portion, which is another part of the joining portion, wherein the joining means includes a first joining portion provided on the first joining portion and the second joining portion. And a second joint portion that is detachably joined to the first joint portion, and the main body portion is formed when the first joint portion and the second joint portion are joined. Is formed at a plurality of positions to form a hollow polyhedron three-dimensional object having a projecting portion that projects outward, and the projecting portion is pushed into the internal space of the three-dimensional object, so that the user sits on the seat portion. Is to be configured.

In this configuration, when the first joint portion and the second joint portion are joined, the flexible main body portion is bent at a plurality of locations to form a hollow polyhedral solid object. Then, the protrusion is pushed into the internal space of the three-dimensional object, so that the seat on which the user sits is formed. Therefore, the seat portion has a shape that wraps around the buttocks and the waist of the user, and it is possible to improve the sitting comfort when using the sofa. Further, by adjusting the extent to which the protrusion is pushed into the internal space, the shape of the seat can be appropriately changed to suit the body shape of the user.

Another feature of the sofa-mattress according to the present invention is that the main body portion is formed as a single continuous plate without being divided.

With this configuration, the main body is formed into a continuous plate-like shape without being divided, so that it is possible to improve the sleeping comfort when using it as a mattress. When transforming the sofa-combined mattress from the first mode used as a mattress to the second mode used as a sofa, the flexible main body is bent at a plurality of points while the first peripheral edge of the main body and the second This work can be easily performed because it is only necessary to join the peripheral portion.

Another feature of the sofa-combination mattress according to the present invention is that the joining means is a fastener having a first element, a second element, and a slider for engaging and separating these elements from each other. The joining portion has the first element, and the second joining portion has the second element.

In this configuration, since a versatile fastener is used as the joining means, the manufacturing cost can be kept low.

Another feature of the sofa-mattress according to the present invention is that the joining means is a surface fastener having a strip-shaped first fastener piece and a strip-shaped second fastener piece, and the first joining portion is the first joining piece. It has a fastener piece, and the 2nd joining part has the 2nd fastener piece.

In this configuration, since the versatile surface fastener is used as the joining means, the manufacturing cost can be kept low.

Another feature of the sofa-combination mattress according to the present invention is that the first joint portion is formed to have a half length of the entire outer peripheral edge of the main body portion, and the second joint portion is outside the main body portion. The length is half the entire length of the peripheral edge and is formed continuously with the first joint portion.

In this configuration, the total length of the first joining portion and the second joining portion is equal to the total length of the outer peripheral edge of the main body portion. Therefore, when the first joining portion and the second joining portion are joined, a three-dimensional object is formed. The interior space of the can be completely blocked. Therefore, even when the interior space is filled with a filling material such as a pillow cushion, a towel and a pillow, the filling material is not visible from the outside, and the appearance can be improved.

Another feature of the sofa-mattress according to the present invention is that the main body has a plate-shaped core material having flexibility and elasticity, and an outer covering material that covers the core material. The first joint portion and the second joint portion are provided on the outer covering material.

In this configuration, since the main body portion has the elastic core material, it is possible to obtain a comfortable sleeping comfort when used as a mattress. Further, since the first joint portion and the second joint portion are provided on the outer covering material, when the first joint portion and the second joint portion are joined, it is possible to suppress an external force from acting on the core material. It is possible to prevent the core material from being damaged by the external force.

Another feature of the sofa-mattress according to the present invention is that it is provided with a filling material packed in the internal space.

With this configuration, when used as a sofa, the mattress that also serves as the sofa can be reinforced by filling the filling material into the internal space. Further, by changing the size, amount, shape, etc. of the filler, the shape of the seat portion can be appropriately adjusted to suit the body shape of the user.

Another feature of the sofa-combination mattress according to the present invention is that, in a state in which the protrusion is pushed into the internal space, a backrest portion that supports the back of the user who is seated on the seat portion and the right arm of the user are downward. And a second armrest portion that supports the left arm of the user from below.

With this configuration, since the user sitting on the seat can use the backrest, the first armrest part, and the second armrest part, a comfortable sitting comfort can be obtained.

Another feature of the sofa-combination mattress according to the present invention is that the main body part in a natural state is formed in a rectangular shape in which a square first part, a square second part and a square third part are linearly arranged. A portion forming one widthwise one end edge of the main body portion in the outer peripheral edge of the first portion as a first side, and one portion forming one lengthwise end edge of the main body portion in the outer peripheral edge of the first portion As a second side, and a portion of the outer peripheral edge of the first portion that constitutes the other widthwise end edge of the main body portion as a third side, and the other side edge of the main body portion in the widthwise direction at the outer peripheral edge of the second portion. Is a fourth side, and a portion of the outer peripheral edge of the second portion that constitutes one widthwise end of the main body portion is a fifth side, and the width of the main body portion at the outer peripheral edge of the third portion is The portion forming one end in the direction is the sixth side, and the portion forming the other end in the lengthwise direction of the main body portion on the outer peripheral edge of the third portion is the seventh side, and the outer peripheral edge of the third portion is When the portion forming the other end in the width direction of the main body portion is the eighth side, the first peripheral edge portion is formed of the first side, the second side, the third side and the fourth side. The second peripheral portion is composed of the fifth side, the sixth side, the seventh side, and the eighth side corresponding to these, and the first peripheral portion and the second peripheral portion. When and are joined by the joining means, the first portion, the second portion and the third portion are bent to form the triangular bipyramidal three-dimensional object, and one triangular pyramid of the three-dimensional object is formed. The part including the apex of is pushed into the internal space as the protrusion.

In this configuration, since the main body in a natural state is formed in a rectangular shape, the body of the user can be efficiently supported without excess or deficiency when the sofa-mattress is used as a cushion. In addition, since the volume of the main body in a natural state can be reduced by winding it in a roll shape, the main body can be easily stored and transported. Furthermore, if one of the three surfaces around the apex of one triangular pyramid is the lower surface of the seat portion that contacts the floor surface, and the other two surfaces are the outer surfaces of the left and right armrest portions, and the sofa is configured, Since the front surface of the can be arranged so as to extend in the left-right direction, the user can easily sit on the seat and easily stand up from the seat.

It is a front view showing the composition of the 1st mode (mattress) of the sofa combined mattress concerning a 1st embodiment. FIG. 2(A) is a right side view showing the configuration of the first mode (mattress) of the sofa/mattress according to the first embodiment, and FIG. 2(B) is a sectional view taken along the line EE in FIG. It is a perspective view showing composition of the 2nd mode (sofa) of the sofa combined mattress concerning a 1st embodiment. FIG. 4 is a diagram showing a configuration of an intermediate mode (three-dimensional object) of the sofa-mattress according to the first embodiment, (A) is a front view, and (B) is a bottom view. 5A and 5B are diagrams showing a configuration of an intermediate mode (three-dimensional object) of the sofa/mattress according to the first embodiment, (A) is a right side view, and (B) is a rear view. 6A and 6B are diagrams showing a configuration of a second mode (sofa) of the sofa/mattress according to the first embodiment, in which (A) is a front view and (B) is a rear view. 7: is a figure which shows the structure of the 2nd aspect (sofa) of the sofa and the mattress which concerns on 1st Embodiment, (A) is a top view, (B) is a bottom view. FIG. 8: is a figure which shows the structure of the 2nd aspect (sofa) of the sofa and mattress which concerns on 1st Embodiment, (A) is a right side view, (B) is a left side view. FIG. 9: is a figure which shows the structure of the 2nd aspect (sofa) of the sofa and the mattress which concerns on 1st Embodiment, (A) is a sectional view taken along the line of FIG. 6(A), and (B) is a figure. FIG. 6 is an enlarged view of a line along line 6B in FIG. It is a front view showing the composition of the 1st mode (mattress) of the sofa combined mattress concerning a 2nd embodiment. It is a perspective view showing composition of the 2nd mode (sofa) of the sofa combined mattress concerning a 2nd embodiment. It is a front view showing the composition of the 1st mode (mattress) of the sofa combined mattress concerning a 3rd embodiment. It is a perspective view which shows the structure of the 2nd aspect (sofa) of the sofa and the mattress which concern on 3rd Embodiment.

Hereinafter, an embodiment of a sofa-mattress according to the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a front view showing a configuration of a first mode (mattress) of a sofa-mattress 10 according to the first embodiment. FIG. 2A is a right side view showing the configuration of the first mode (mattress) of the sofa/mattress 10 according to the first embodiment. FIG. 2B is a sectional view taken along the line EE in FIG. FIG. 3 is a perspective view showing a configuration of a second mode (sofa) of the sofa/mattress 10 according to the first embodiment. 4 and 5 are diagrams showing the configuration of an intermediate mode (three-dimensional object) of the sofa/mattress 10 according to the first embodiment, FIG. 4(A) is a front view, and FIG. 4(B) is a bottom view. 5A is a right side view and FIG. 5B is a rear view.

The sofa/mattress 10 according to the first embodiment is used as a mattress shown in FIG. 1 (hereinafter referred to as “first aspect”) and as a sofa shown in FIG. 3 (hereinafter referred to as “second aspect”). It is configured so that it can be selectively taken. The three-dimensional object 12 of the intermediate aspect shown in FIGS. 4 and 5 is temporarily in the middle of transforming the sofa-mattress 10 from the first aspect to the second aspect, or in the middle of transforming the second aspect into the first aspect. This is the way it occurs.

(First mode)
The sofa-combined mattress 10 of the first embodiment shown in FIG. 1 is a mattress that is laid on a floor or the like and used by a user to sleep. As shown in FIGS. 1 and 2(A), the sofa-combination mattress 10 of the first embodiment includes a plate-shaped main body 14 having a rectangular shape in plan view and a part of an outer peripheral edge of the main body 14. The first peripheral portion 16 and the second peripheral portion 18, which is another part of the outer peripheral edge of the main body portion 14, are detachably joined to each other by a joining means 20. The size of the sofa/mattress 10 is determined so as to support the body of the user lying down in the first mode and to allow the user to easily sit in the second mode. It is set to have a length of 2400 mm, a width of 800 mm, and a thickness of 60 mm on the assumption that it will be used by a grown-up adult male.

As shown in FIG. 2B, the main body 14 has a rectangular plate-shaped core material 22 in a front view (FIG. 1) and an outer covering material 24 that covers the core material 22. The core material 22 is made of a material having flexibility and elasticity (urethane foam in this embodiment) and is formed into one continuous plate without being divided. The size of the main body portion 14 is set to be substantially the same as the overall size of the sofa/mattress 10, and in this embodiment, the length is set to about 2400 mm, the width is set to about 800 mm, and the thickness is set to about 60 mm. The outer covering material 24 is formed in a bag shape using a sheet-shaped material (polyethylene sheet in the present embodiment) having excellent robustness and abrasion resistance.

The material of the core material 22 is not limited to urethane foam, and for example, natural rubber sponge, polyethylene foam, polypropylene foam, silicone foam or the like may be used. Further, the material of the outer cover material 24 is not limited to the polyethylene sheet, and for example, a polyester sheet, a polyurethane sheet, a nylon sheet, synthetic leather, genuine leather, canvas or the like may be used.

As shown in FIG. 1, the main body 14 in a natural state is formed in a rectangular shape in which a square first portion 26, a square second portion 28, and a square third portion 30 are linearly arranged.

Here, each side 32a-32h of the 1st part 26, the 2nd part 28, and the 3rd part 30 is defined as follows. That is, a portion of the outer peripheral edge of the first portion 26 that constitutes one end in the width direction of the main body portion 14 is defined as a first side 32a, and one end in the longitudinal direction of the main body portion 14 at the outer peripheral edge of the first portion 26 is defined. The portion that constitutes the edge is the second side 32b, and the portion that constitutes the other edge in the width direction of the main body portion 14 at the outer peripheral edge of the first portion 26 is the third side 32c. Further, a portion of the outer peripheral edge of the second portion 28 that constitutes the other widthwise end edge of the main body portion 14 is defined as a fourth side 32d, and constitutes a widthwise one end edge of the main body portion 14 at the outer peripheral edge of the second portion 28. The portion is the fifth side 32e. Further, a portion of the outer peripheral edge of the third portion 30 which constitutes one widthwise end edge of the main body portion 14 is defined as a sixth side 32f, and constitutes the other longitudinal end edge of the main body portion 14 at the outer peripheral edge of the third portion 30. The portion to be formed is the seventh side 32g, and the portion forming the other widthwise end of the main body portion 14 at the outer peripheral edge of the third portion 30 is the eighth side 32h.

When the sides 32a to 32h are defined in this way, the first peripheral edge portion 16 of the main body portion 14 is composed of the first side 32a, the second side 32b, the third side 32c, and the fourth side 32d. The second peripheral edge portion 18 joined to the peripheral edge portion 16 is composed of a fifth side 32e, a sixth side 32f, a seventh side 32g and an eighth side 32h corresponding to these.

As shown in FIG. 1, the joining means 20 is provided on the first joining portion 34 provided on the outer covering material 24 of the first peripheral edge portion 16 and the outer covering material 24 of the second peripheral edge portion 18, and the first joining portion The second joint portion 36 is detachably joined to the portion 34. The first joint portion 34 is formed to have a half length of the outer peripheral edge length of the main body portion 14, and the second joint portion 36 has a half length of the outer peripheral edge length of the main body portion 14. 34 is formed continuously.

As shown in FIG. 9(B), the joining means 20 of the present embodiment includes a first tape 38, a first element 40 provided on the first tape 38, a second tape 42, and a second tape 42. A fastener having a second element 44 provided and a slider 46 for engaging and disconnecting the first element 40 and the second element 44. Therefore, the first joining portion 34 has the first tape 38 and the first element 40, and the second joining portion 36 has the second tape 42 and the second element 44, and the first element 40. The first peripheral edge portion 16 and the second peripheral edge portion 18 are joined to each other by engaging the and the second element 44 with each other.

(Second mode)
6, FIG. 7, FIG. 8 and FIG. 9 are views showing the configuration of a second mode (sofa) of the sofa/mattress 10 according to the first embodiment, and FIG. 6(A) is a front view, FIG. 7B is a plan view, FIG. 7B is a bottom view, FIG. 8A is a right side view, and FIG. 8B is a left side view. Further, FIG. 9A is a cross-sectional view taken along the line Loro in FIG. 6A, and FIG. 9B is an enlarged view taken along the line Har in FIG. 6B.

As shown in FIG. 3, the sofa-combination mattress 10 of the second aspect includes a seat portion 50 on which the user sits, a backrest portion 52 that supports the back of the user, and a first portion that supports the right arm of the user from below. The armrest portion 54, the second armrest portion 56 that supports the left arm of the user from below, and the filling material 58 are provided.

The sofa-combination mattress 10 of the second aspect is a hollow polyhedron (triangular double pyramid in this embodiment) three-dimensional object 12 (FIGS. 4 and 5) formed by deforming the plate-shaped main body 14 shown in FIG. ) Is further deformed. The filling material 58 is a member that is packed in the internal space S of the three-dimensional object 12 in order to reinforce the sofa-mattress 10. The type of the filler 58 is not particularly limited, and for example, pillow cushions, pillows, towel blankets, blankets, clothes, etc. can be used, but they must have cushioning properties in order to improve the sitting comfort. Is desirable.

The three-dimensional object 12 shown in FIGS. 4 and 5 is formed in a triangular double pyramid shape having two triangular pyramids 60a and 60b, and has six faces 62a to 62f and five apexes 64a to 64e. There is. The side surface of one triangular pyramid 60a is composed of three surfaces 62a, 62d, 62e of a right-angled isosceles triangle, and the vertex 64b of the triangular pyramid 60a is composed of these right-angled parts. The side surface of the other triangular pyramid 60b is composed of three surfaces 62b, 62c, 62f of an isosceles right triangle, and the vertex 64d of the triangular pyramid 60b is composed of these right angles.

The three-dimensional object 12 shown in FIGS. 4 and 5 is configured by joining the first peripheral edge portion 16 and the second peripheral edge portion 18 of the plate-shaped main body portion 14 shown in FIG. When joining the first peripheral edge portion 16 and the second peripheral edge portion 18, the user moves the slider 46 of the jointing means 20 shown in FIG. 1 from the starting point to the end point, and moves the slider shown in FIG. The first element 40 and the second element 44 are meshed with each other over the entire length. At this time, the first portion 26, the second portion 28, and the third portion 30 shown in FIG. 1 are bent at a plurality of positions along the diagonal lines 26a, 28a, 30a and the boundary lines 66a, 66b. As a result, the hollow polyhedral three-dimensional object 12 having the protruding portion 70 (FIG. 5A) protruding outward is formed. When the three-dimensional object 12 is deformed to obtain the sofa-combination mattress 10 of the second aspect, the portion including the apex 64b of the triangular pyramid 60a is pushed into the internal space S as the protruding portion 70 and the seat portion shown in FIG. 50 are configured.

As shown in FIG. 1, in the present embodiment, the boundary between the first side 32a and the fifth side 32e is the starting point, and the boundary between the fourth side 32d and the eighth side 32h is the ending point. There is. Therefore, when the user moves the slider 46 from the start point to the end point, first, the first side 32a and the fifth side 32e shown in FIG. 1 are joined to each other, and as shown in FIG. 4(A). A boundary line 68a between the first surface 62a and the fourth surface 62d is formed. Subsequently, the second side 32b and the sixth side 32f shown in FIG. 1 are joined to form a boundary line 68b between the first surface 62a and the fifth surface 62e shown in FIG. 4(A). Thereafter, the third side 32c and the seventh side 32g shown in FIG. 1 are joined to form a boundary line 68c between the second surface 62b and the sixth surface 62f shown in FIG. 5(A). Finally, the fourth side 32d and the eighth side 32h shown in FIG. 1 are joined to form a boundary line 68d between the third surface 62c and the sixth surface 62f shown in FIG. 5B.

In order to configure the sofa/mattress 10 of the second mode shown in FIGS. 3 and 6 to 9, the filler 58 is added to the internal space S (FIG. 9A) of the three-dimensional object 12 shown in FIGS. 4 and 5. However, if the filler 58 is packed before the seat 50 is formed, the work of forming the seat 50 becomes difficult. Therefore, in the present embodiment, the seat portion 50 is configured after the third side 32c and the seventh side 32g are joined and before the fourth side 32d and the eighth side 32h are joined, and then, the The filling material 58 is packed into the internal space S from between the four sides 32d and the eighth side 32h, and finally, the fourth side 32d and the eighth side 32h are joined together.

(Effects of the embodiment)
According to the present embodiment, the following effects can be achieved with the above configuration. That is, since the seat portion 50 shown in FIG. 3 is configured by pushing the protrusion 70 shown in FIG. 5A into the internal space S of the three-dimensional object 12, the seat portion 50 includes the buttocks and waist of the user. It becomes a shape that wraps around. Therefore, it is possible to improve the sitting comfort when the sofa/mattress 10 is used as a sofa. Also, by adjusting the extent to which the protrusion 70 is pushed into the internal space S, the shape of the seat 50 can be appropriately changed to suit the body shape of the user.

As shown in FIG. 2(B), since the main body 14 in the first mode (mattress) is formed into a single continuous plate without being divided, a comfortable sleeping comfort can be obtained. When the sofa/mattress 10 is deformed from the first mode (mattress) to the second mode (sofa), the first peripheral edge portion 16 and the second peripheral edge portion 18 are joined while bending the main body portion 14 at a plurality of locations. All you need to do is do this easily.

As shown in FIG. 9(A), since a versatile fastener is used as the joining means 20, the manufacturing cost can be kept low.

As shown in FIG. 1, since the total length of the first joining portion 34 and the second joining portion 36 is the same as the entire outer peripheral edge length of the main body portion 14, the first joining portion 34 and the second joining portion 34 are joined together. When joined to the portion 36, the internal space S of the three-dimensional object 12 can be completely closed. Therefore, even when the interior space S is filled with the filling material 58 such as a pillow cushion, a towel and a pillow, the filling material 58 is not visible from the outside, and the appearance can be improved.

As shown in FIG. 2(B), since the main body portion 14 has the elastic core material 22, it is possible to obtain a comfortable sleeping comfort when the sofa/mattress 10 is used as a mattress. Further, since the first joint portion 34 and the second joint portion 36 are provided on the outer covering material 24, when the first joint portion 34 and the second joint portion 36 are joined, an external force is applied to the core material 22. Can be suppressed and damage to the core material 22 due to the external force can be prevented.

As shown in FIG. 9(A), in the second mode (sofa), since the filling material 58 is packed in the internal space S, the sofa/mattress 10 can be reinforced with the filling material 58. Further, by changing the size, amount, shape, etc. of the filling material 58, the shape of the seat portion 50 can be appropriately adjusted to suit the body shape of the user.

In the second mode (sofa) shown in FIG. 3, since the user sitting on the seat portion 50 can use the backrest portion 52, the first armrest portion 54 and the second armrest portion 56, a comfortable sitting comfort is provided. Obtainable.

As shown in FIG. 1, since the main body 14 in a natural state is formed in a rectangular shape, in the first mode (cushion), the sofa/mattress 10 can efficiently support the body of the user without excess or deficiency. Further, by winding the body portion 14 in a natural state in a roll shape, the volume thereof can be reduced, so that it is easy to store and transport.

As shown in FIG. 5B, in the second mode (sofa), one surface 62d of the three surfaces around the apex 64d of the one triangular pyramid 60b is set as the lower surface of the seat portion 50 that contacts the floor surface. Since the other two surfaces 62c and 62f are outer surfaces of the left and right armrest portions 54 and 56 (FIG. 3), the front surface 50a of the seat portion 50 can be arranged so as to extend in the left-right direction. Therefore, the user can easily sit on the seat 50 and easily stand up from the seat 50.

(Modification)
The present invention is not limited to the above-described first embodiment, and various modifications can be made without departing from the object of the present invention. For example, in the first embodiment, the sofa-mattress 10 of the second aspect includes the filler 58, but the filler 58 may be omitted. Further, the filler 58 may be packed in the internal space S of the three-dimensional object 12 before forming the seat portion 50.

As shown in FIG. 2B, in the first embodiment, the core material 22 of the main body 14 is formed in a single plate shape, but the core material 22 is divided into a plurality of plate materials. It may be formed. In this case, by dividing and arranging the plate material for each of the surfaces 62a to 62f forming the three-dimensional object 12, the work of bending the boundary portion between the surfaces can be easily performed.

As shown in FIGS. 1 and 2B, in the first embodiment, the main body 14 is formed in a single plate shape, but the main body 14 is divided into a plurality of plate-like divided pieces. It may be formed by. In this case, the divided pieces adjacent to each other may be detachably joined with a fastener, a surface fastener, a button, a hook, a string, or the like.

As shown in FIG. 2B, in the first embodiment, the main body portion 14 has the core material 22 and the outer covering material 24, but the main body portion 14 is bent to form the core material 22. Only a material having elasticity and elasticity may be formed into one continuous plate without being divided.

As shown in FIG. 9B, in the first embodiment, a fastener is used as the joining means 20, but a hook-and-loop fastener, a button, a hook, a string, or the like may be used instead of the fastener.

When a surface fastener is used as the joining means 20, the first joining portion 34 of the joining means 20 has a strip-shaped first fastener piece of the fastener, and the second joining portion 36 of the joining means 20 is the surface fastener. It has a strip-shaped second fastener piece. Then, by joining the first fastener piece and the second fastener piece, the first peripheral edge portion 16 and the second peripheral edge portion 18 are joined together.

When a string is used as the joining means 20, the first joining part 34 of the joining means 20 has a part of the string and a plurality of through holes formed along the first peripheral portion 16, The second joint 36 of 20 has another part of the string and a plurality of through holes formed along the second peripheral portion 18. Then, the first peripheral edge portion 16 and the second peripheral edge portion 18 are joined by inserting a string into each through hole.

As shown in FIG. 1, in the first embodiment, the three-dimensional object 12 is formed in a triangular double pyramid shape, and the main body portion 14 in the first mode is formed in a rectangular shape in which the triangular double pyramid shape is developed. The three-dimensional object 12 may be formed in another polyhedron, and the main body 14 may be formed in another shape in which another polyhedron is expanded.

(Second embodiment)
FIG. 10 is a front view showing the configuration of the first mode (mattress) of the sofa/mattress 74 according to the second embodiment. FIG. 11 is a perspective view showing a configuration of a second mode (sofa) of the sofa/mattress 74 according to the second embodiment. In the second embodiment, the main body portion 76 of the sofa/mattress 74 of the first mode shown in FIG. 10 is formed in a shape in which a cubic solid object (not shown) is developed.

When transforming the sofa/mattress 74 from the first aspect to the second aspect, the first peripheral edge portion 78 and the second peripheral edge portion 80 of the main body portion 76 shown in FIG. A cubic solid object (not shown) is formed. Then, as shown in FIG. 11, the protrusion 84 including one vertex of the three-dimensional object is pushed into the internal space to form the sofa-combination mattress 74 of the second aspect. The sofa/mattress 74 of the second mode includes a seat portion 86 on which the user sits, a backrest portion 88 that supports the back of the user, a first armrest portion 90 that supports the right arm of the user from below, and a user. A second armrest portion 92 for supporting the left arm of the above from below and a filler (not shown). Therefore, a comfortable sitting comfort can be obtained as in the sofa/mattress 10 according to the first embodiment.

(Third Embodiment)
FIG. 12 is a front view showing the configuration of the first mode (mattress) of the sofa/mattress 94 according to the third embodiment. FIG. 13 is a perspective view showing a configuration of a second mode (sofa) of the sofa/mattress 94 according to the third embodiment. In the third embodiment, the main body portion 96 of the sofa/mattress 94 of the first mode shown in FIG. 12 is formed in a shape in which a three-dimensional object (not shown) having a regular tetrahedron is developed.

When transforming the sofa/mattress 94 from the first aspect to the second aspect, the first peripheral edge portion 98 and the second peripheral edge portion 100 of the main body portion 96 shown in FIG. A regular tetrahedron solid object (not shown) is formed. Then, as shown in FIG. 13, the protrusion 104 including one vertex of the three-dimensional object is pushed into the internal space to form the sofa-combination mattress 94 of the second aspect. In the sofa-mattress 94 of the second aspect, the user's buttocks and waist can be wrapped around the periphery of the seat 106, so that a comfortable sitting comfort can be obtained.

S...Internal space, 10...Sofa mattress, 12...Three-dimensional object, 14...Main body part, 16...First peripheral part, 18...Second peripheral part, 20...Joining means, 22...Core material, 24...Coating Material, 26... 1st part, 28... 2nd part, 30... 3rd part, 32a-32h... Side, 34... 1st joining part, 36... 2nd joining part, 50... Seat part, 58... Filler, 60a, 60b... Triangular pyramid, 70... Projection part.

Claims (9)

A plate-shaped main body having flexibility,
A first peripheral part that is a part of the outer peripheral edge of the main body part and a second peripheral part that is another part of the outer peripheral edge of the main body part, and a joining means that detachably joins the second peripheral part.
The joining means has a first joining portion provided on the first peripheral portion and a second joining portion provided on the second peripheral portion and detachably joined to the first joining portion. And
When the first joint portion and the second joint portion are joined, the main body portion is bent at a plurality of locations to form a hollow polyhedral three-dimensional object having a protruding portion that projects outward.
A sofa-combined mattress in which a seat on which a user sits is configured by pushing the protrusion into the internal space of the three-dimensional object. The sofa main mattress according to claim 1, wherein the main body is formed into a single plate that is continuous without being divided. The joining means is a fastener having a first element, a second element, and a slider for engaging or separating the first element and the second element,
The first joint has the first element,
The sofa-combined mattress according to claim 1 or 2, wherein the second joint has the second element. The joining means is a surface fastener having a strip-shaped first fastener piece and a strip-shaped second fastener piece,
The first joint portion has the first fastener piece,
The sofa-mattress according to claim 1 or 2, wherein the second joint portion includes the second fastener piece. The first joint portion is formed to have a half length of the outer peripheral edge length of the main body portion, and the second joint portion has a half length of the outer peripheral edge length of the main body portion. The sofa-mattress according to claim 3 or 4, wherein the mattress is formed continuously with the section. The main body portion has a plate-shaped core material having flexibility and elasticity, and a jacket material that covers the core material,
The sofa-combined mattress according to any one of claims 1 to 5, wherein the first joint portion and the second joint portion are provided on the outer covering material. 7. The sofa-combined mattress according to any one of claims 1 to 6, further comprising a filling material packed in the internal space. A backrest portion that supports the back of the user seated on the seat portion, a first armrest portion that supports the right arm of the user from below, and a left arm of the user when the protrusion is pushed into the internal space. The sofa-mounted mattress according to any one of claims 1 to 7, further comprising: a second armrest part that supports the lower part from below. The main body in a natural state is formed in a rectangular shape in which a square first portion, a square second portion, and a square third portion are linearly arranged,
A portion of the outer peripheral edge of the first portion, which constitutes one end in the width direction of the main body portion, is defined as a first side,
A portion of the outer peripheral edge of the first portion, which constitutes one longitudinal end of the main body portion, is defined as a second side,
A portion of the outer peripheral edge of the first portion, which constitutes the other edge in the width direction of the main body portion, is defined as a third side,
A portion of the outer peripheral edge of the second portion, which constitutes the other end in the width direction of the main body portion, is defined as a fourth side,
A portion of the outer peripheral edge of the second portion, which constitutes one end in the width direction of the main body portion, is defined as a fifth side,
A portion of the outer peripheral edge of the third portion which constitutes one widthwise end edge of the main body portion is defined as a sixth side,
A portion of the outer peripheral edge of the third portion, which constitutes the other end in the lengthwise direction of the main body portion, is defined as a seventh side,
When a portion of the outer peripheral edge of the third portion, which constitutes the other widthwise end of the main body portion, is the eighth side,
The first peripheral portion includes the first side, the second side, the third side, and the fourth side, and the second peripheral portion corresponds to the fifth side, the fifth side, and the fourth side. 6 sides, the 7th side and the 8th side,
When the first peripheral portion and the second peripheral portion are joined by the joining means, the first portion, the second portion and the third portion are bent to form the triangular double-pyramidal three-dimensional object. Composed,
9. The sofa-combined mattress according to claim 1, wherein a portion of the three-dimensional object including the apex of one triangular pyramid is pushed into the internal space as the protrusion.