JP2021112284A - Sofa bed - Google Patents

Abstract

To improve cushioning properties in a backrest part in a sofa bed having legs by increasing thickness dimension of an auxiliary part as the backrest part, without increasing height dimension of the legs.SOLUTION: A thickness dimension (H3) of a second body piece 12 that constitutes a body part 1 is set smaller than a thickness dimension (H1) of a first body piece 11. In a state of making the sofa bed as a mattress bed, the total value of the thickness dimension (H1) of the first body piece (11) and a height dimension (H2) of a leg part 14 is equalized with the total value of the thickness dimension (H3) of the second body piece 12 and a thickness dimension (H4) of an auxiliary part 2 in an open posture. A spring unit 26 of a first mattress 16 constituting the first body piece 11 and a spring unit 30 of the second body piece 12 are formed with a spring unit of the same specification which is identically set in the number of pieces of pocket coils 25, 34, the elasticity of each pocket coil 5, 34, and the thickness dimension.SELECTED DRAWING: Figure 1

Description

The present invention relates to a sofa bed that can be used as a sofa and a mattress bed.

Patent Document 1 can be mentioned as a conventional example of this type of sofa bed. The sofa bed of Patent Document 1 includes a mat portion 4 formed by connecting a pair of cushion bodies 2 and 3 and headboards 5 and 5 detachably attached to both ends of each of the cushion bodies 2 and 3. To be equipped with. A leg 30 is provided on the back surface of one cushion body 3, and a support 6 is pivotally attached to the back surface of the other cushion body 2. The thickness dimensions of both cushion bodies 2 and 3 are set to the same dimensions. Further, the height dimension of the leg 30 on the cushion body 3 side and the thickness dimension of the support 6 on the cushion body 2 side are set to the same dimension.

According to the sofa bed having the above configuration, the headboards 5 and 5 are attached side by side to one end of both cushion bodies 2 and 3 after the cushion bodies 2 and 3 are in the deployed state. The sofa bed can be used as a mattress bed. At this time, since the thickness dimensions of both cushion bodies 2 and 3 are set to the same dimensions and the height dimension of the leg 30 and the thickness dimension of the support 6 are set to the same dimensions, both cushion bodies 2 and 3 are set to the same thickness. The height position of 3 can be uniformly aligned to flatten the bed surface.

Further, the other cushion body 2 is superposed on one cushion body 3, the headboard 5 is attached to both ends of the lower cushion body 3, and then the support 6 is raised around the pivot portion. The sofa bed can be used as a sofa by leaning the support 6 against the fasteners 50 located at the upper edge corners of the facing headboards 5. At this time, the stacked cushion bodies 2 and 3 serve as seat cushions, the headboards 5 and 5 serve as armrests, and the support 6 bridged between the headboards 5 and 5 serves as a seat back (backrest portion).

Microfilm of Jitsugyo No. 61-138062 (Jitsukaisho No. 63-42261)

As described above, in the sofa bed of Patent Document 1, the height dimension of the leg 30 and the thickness dimension of the support 6 serving as the backrest portion are set to the same dimension. Therefore, there is a limit to the thickness dimension of the support 6 serving as the backrest portion, and it is not easy to improve the cushioning property of the backrest portion when used as a sofa. In addition, when a configuration is adopted in which the legs 30 are provided on the lower surface of the cushion body 3, it is necessary to incorporate a frame for supporting the legs 30 below the cushion body 3. In a configuration in which the thickness dimensions of the cushion bodies 2 and 3 are set to the same dimensions as described above, the cushioning property of the cushion body 3 may be impaired by the amount of the frame provided, and both cushion bodies 2 and 3 are expanded. When the sofa bed is used as a mattress bed, the cushioning properties of the two cushion bodies 2 and 3 are different, and the sleeping comfort tends to deteriorate.

The present invention has two main body pieces connected around a hinge portion, and is configured so that the posture can be displaced between the unfolded posture in which both main body pieces are spread out and the folded posture in which both main body pieces are overlapped. It has a main body, and one main body is provided with a leg and a frame to support it. In a sofa bed that can be used as a sofa and a bed, the backrest does not increase the height of the leg. It is possible to improve the cushioning property of the backrest part by increasing the thickness dimension of the auxiliary part, and to make the cushioning property of both main body pieces uniform while incorporating the bed frame in only one main body part. The purpose is to be able to.

The sofa bed of the present invention has a square block-shaped first main body piece 11 having flat upper and lower surfaces, leg portions 14 extending downward from the lower surface of the first main body piece 11, and first front-back and left-right dimensions. A square block-shaped second main body in which the front and rear and left and right dimensions of the main body piece 11 are set to be the same, and the thickness dimension in the vertical direction is set to be smaller than that of the first main body piece 11, and the upper and lower surfaces are formed into flat surfaces. It is provided with a piece 12 and a hinge portion 13 for connecting both main body pieces 11 and 12, and a folding posture in which the second main body piece 12 is stacked above the first main body piece 11 and a deployment in which both main body pieces 11 and 12 are unfolded. A main body 1 that can be displaced between the postures, two auxiliary pieces 41 and 42 having the same thickness in the vertical direction, and a hinge part 43 that connects both auxiliary pieces 41 and 42. When the main body 1 is in the folded posture, the posture can be changed between the folded posture in which both auxiliary pieces 41 and 42 are overlapped and the unfolded posture in which both auxiliary pieces 41 and 42 are spread. It is provided with an auxiliary portion 2 that is placed above the second main body piece 12 in a folded position, or is placed below the second main body piece 12 in a unfolded position when the main body 1 is in a unfolded position. Elastic elements are built in each of the first main body piece 11, the second main body piece 12, and the auxiliary pieces 41 and 42. It can be used as a mattress bed by installing the auxiliary part 2 in the unfolded posture between the two, and after the main body 1 is in the folded posture, the auxiliary part 2 is placed on the main body 1 as the backrest. It is configured so that it can be used as a sofa by placing it. The total value of the thickness dimension (H1) of the first main body piece 11 and the height dimension (H2) of the leg portion 14, and the thickness dimension (H3) of the second main body piece 12 and the auxiliary portion 2 in the unfolded posture. The total value with the thickness dimension (H4) is set to the same dimension. The first body piece 11 includes a frame 15 supported by the legs 14 and a first mattress 16 arranged on the frame 15. The first mattress 16 and the second main body piece 12 are provided with spring units 26 and 30 having a group of pocket coils 25 and 34 arranged adjacent to each other in a matrix in the front-rear direction and the left-right direction as elastic elements. Then, the spring unit 26 of the first mattress 16 and the spring unit 30 of the second main body piece 12 are set to have the same number of pocket coils 25 and 34, elasticity of each pocket coil 25 and 34, and thickness dimension. It is characterized by being formed of spring units having the same specifications.

The front-rear and left-right dimensions of the auxiliary portion 2 in the unfolded posture are set to be the same as the front-rear and left-right dimensions of the second main body piece 12.

The first mattress 16 and the second main body piece 2 include cushioning materials 17 and 31 arranged on the upper surfaces of the spring units 26 and 30, respectively, as elastic elements. Both cushioning materials 17 and 31 are formed of cushioning materials having the same material and thickness dimensions and having the same specifications.

In the sofa bed of the present invention, the thickness dimension (H3) of the second main body piece 12 constituting the main body portion 1 is made smaller than the thickness dimension (H1) of the first main body piece 11, and the main body portion 1 is made of both main body pieces 11. -The sofa bed is configured to be used as a mattress bed by installing the auxiliary part 2 in the unfolded posture between the second main body piece 12 and the floor surface F after the 12 is in the unfolded posture. did. According to this, in order to align the height position of the bed surface of the mattress bed when the main body 1 is in the unfolded posture, the thickness dimension (H4) of the auxiliary portion 2 when the main body 1 is in the unfolded posture is set to the leg portion 14. It is not enough to set the height dimension (H2) of the above, and the difference between the thickness dimension (H1) of the first main body piece 11 and the thickness dimension (H3) of the second main body piece 12 is added to the dimension (H2). There is a need. From the above, according to the present invention, it is possible to increase the thickness dimension (H4) of the auxiliary portion 2 in the deployed posture without increasing the height dimension (H2) of the leg portion 14. Further, according to the present invention, when the sofa is used as a sofa, the auxiliary portion 2 in the folded posture is used as the backrest portion, so that the thickness dimension of the backrest portion of the sofa can be increased to each step. From the above, according to the present invention, it is possible to improve the cushioning property of the auxiliary portion 2 (the auxiliary portion 2 in the folded posture) which is the backrest portion, so that a sofa bed having excellent practical convenience as a sofa can be obtained. Obtainable.

In addition, the first body piece 11 is assumed to include a frame 15 supported by the legs 14 and a first mattress 16 arranged on the frame 15, a spring unit 26 of the first mattress 16 and a first. 2 When the spring unit 30 of the main body piece 12 is formed of a spring unit having the same specifications in which the number of pocket coils 25 and 34, the elasticity of each pocket coil 25 and 34, and the thickness dimension are set to be the same, the first While the frame 15 is built in the main body piece 11, the cushioning properties of both main body pieces 11 and 12 can be made uniform. As a result, the cushioning properties of both main body pieces 11 and 12 can be made uniform when the main body 1 is in the unfolded posture. Therefore, it is possible to obtain a sofa bed having excellent practical convenience as a mattress bed.

If the front-rear and left-right dimensions of the auxiliary portion 2 in the unfolded posture are set to be the same as the front-rear and left-right dimensions of the second main body piece 12, the second main body piece 12 is used as a mattress bed. It is possible to prevent the auxiliary portion 2 from protruding from the peripheral edge of the second main body piece 12 when the auxiliary portion 2 is placed below the above in the unfolded posture. As a result, when used as a mattress bed, the entire lower surface of the second main body piece 12 can be supported by the auxiliary portion 2 in the unfolded posture, so that the second main body piece 12 may inadvertently wobble. , It is possible to stably support the second main body piece 12 by suppressing a part of the second main body piece 12 from sinking. Further, since it is possible to prevent the auxiliary portion 2 in the deployed posture from protruding from the peripheral edge of the second main body piece 12, the user does not feel a sense of discomfort when used as a mattress bed.

The cushion material 17 arranged on the spring unit 26 of the first mattress 16 and the cushion material 31 arranged on the upper surface of the spring unit 30 of the second main body piece 12 have the same material and the same thickness dimension. When the spring units 26 and 30 are made of the same cushioning material, the cushioning properties of the first mattress 16 and the second main body piece 12 can be made more uniform.

It is a side view when the sofa bed of this invention is used as a mattress bed. It is a perspective view when the sofa bed is used as a mattress bed. It is a figure for demonstrating the posture displacement of a main body part and an auxiliary part. It is a perspective view when the sofa bed is used as a sofa. It is a perspective view which shows another form when a sofa bed is used as a sofa. It is a vertical side view when a sofa bed is used as a sofa. It is a top view, a front view, a bottom view, a rear view, and a right side view when a sofa bed is used as a mattress bed. It is a top view, a front view, a bottom view, a rear view, and a right side view when a sofa bed is used as a sofa. It is a top view, a front view, a bottom view, a rear view, and a right side view which show another form when a sofa bed is used as a sofa.

(Examples) FIGS. 1 to 9 show examples of the sofa bed of the present invention. The front-back, left-right, and up-down in this embodiment follow the crossing arrows shown in FIGS. 1, 2, 4, and 6, and the front-back, left-right, and up-down notations in the vicinity of the arrows. In FIG. 3, reference numeral 1 indicates a main body portion, and reference numeral 2 indicates an auxiliary portion configured separately from the main body portion 1. In the sofa bed of the present embodiment, the main body portion 1 and the auxiliary portion 2 are combined. As a result, the sofa as shown in FIG. 4 and the mattress bed as shown in FIG. 2 are configured to be mutually convertible. In this embodiment, as a general rule, the front-rear surface, the left-right surface, and the upper and lower surfaces of the main body portion 1 and the auxiliary portion 2 are defined based on the posture state shown in FIG.

As shown in FIG. 3, the main body 1 is a hinge that connects a pair of front and rear square block-shaped first and second main body pieces 11 and 12 having flat upper and lower surfaces and both main body pieces 11 and 12. A portion 13 and a leg portion 14 projecting from the lower surface of the first main body piece 11 are provided. As shown in FIG. 1, the first main body piece 11 is provided on a hollow box-shaped frame 15 supported by the legs 14, a first mattress 16 arranged above the frame 15, and an upper surface of the first mattress 16. It is composed of a urethane sheet 17 which is an arranged cushioning material, a felt sheet 18 arranged on the lower surface of the first mattress 16, and a surface material 19 which covers them. The frame 15 is composed of a bottom plate 21 on the lower side, four side plates 22 erected on the four peripheral edges of the bottom plate 21, and a top plate 23 arranged at the upper end of the side plates 22, and columns are formed at the four corners of the bottom plate 21. The shaped leg 14 is fixed. The plates 21, 22, 23 and the legs 14 constituting the frame 15 are made of wood. The leg portion 14 may have a conical trapezoidal shape as well as a cylindrical shape. A sheet material for protecting the floor surface, a sheet material for preventing slippage, and the like can be arranged on the bottom surface of the leg portion 14 in contact with the floor surface F.

The first mattress 16 has a spring unit 26 having a plurality of drum-shaped pocket coils 25 arranged adjacent to each other in a matrix in the front-rear direction and the left-right direction as an elastic element, and the frame 15 is formed via a felt seat 18. It is placed on the top plate 23. The urethane sheet 17 exerts an elastic action in cooperation with the first mattress 16, and is arranged on the upper surface of the first mattress 16. The front-rear and left-right dimensions of the frame 15, felt sheet 18, first mattress 16, and urethane sheet 17 constituting the first main body piece 11 are set to substantially the same dimensions, and the first main body piece 11 as a whole is viewed in a plan view. It is formed in the shape of a substantially square square block. The surface covering material 19 that covers the surface of the first main body piece 11 is formed of cloth. The surface material 19A that covers the upper surface and the side surface of the first main body piece 11 and the surface material 19B that covers the lower surface of the first main body piece 11 are made of different materials.

The second main body piece 12 covers the spring unit 30 which is an elastic element, the urethane sheets 31 and 32 which are cushioning materials arranged on the upper and lower surfaces of the spring unit 30, and the spring unit 30 and the urethane sheets 31 and 32. It is composed of a surface material 33. The front-rear and left-right dimensions of the second main body piece 12 are set to be the same as the front-rear and left-right dimensions of the first main body piece 11. The vertical thickness dimension (H3) of the second main body piece 12 is set smaller than the vertical thickness dimension (H1) of the first main body piece 11. Similar to the first mattress 16, the spring unit 30 includes a plurality of drum-shaped pocket coils 34 arranged adjacent to each other in a matrix in the front-rear direction and the left-right direction.

The surface covering material 33 that covers the upper and lower surfaces and the side surface of the second main body piece 12 is made of the same material as the surface covering material 19 (19A) that covers the upper surface and the side surface of the first main body piece 11. The surface material 19 (19A) covering the upper surface of the first main body piece 11 and the surface material 33 (33A) covering the upper surface of the second main body piece 12 are formed of a single piece of cloth, and are formed at the boundary between the upper surfaces. The surface covering material is a hinge portion 13 that connects the first main body piece 11 and the second main body piece 12.

As shown in FIG. 3, the main body portion 1 having the above configuration can be displaced with respect to the hinge portion 13. More specifically, the main body 1 has a folding posture in which the first main body piece 11 and the second main body piece 12 are overlapped as shown in FIGS. 4 to 6, and the first main body 1 is shown in FIGS. 1 and 2. The posture can be appropriately displaced between the main body piece 11 and the unfolded posture in which the second main body piece 12 is spread in the front-rear direction. In the folded posture, the two surfaces (upper surfaces) of the two main body pieces 11 and 12 facing each other across the hinge portion 13 overlap. In the unfolded posture, each of the two surfaces of the two main body pieces 11 and 12 facing each other across the hinge portion 13 is directed upward.

As shown in FIG. 3, the auxiliary portion 2 includes a pair of front and rear first and second auxiliary pieces 41 and 42 having flat upper and lower surfaces and a hinge portion 43 connecting both auxiliary pieces 41 and 42. Be prepared. As shown in FIGS. 1 and 6, both auxiliary pieces 41 and 42 are composed of block-shaped urethane blocks 44 and 45 and surface covering materials 46 and 47 covering the urethane blocks 44 and 45. The thickness dimensions (H4) of both auxiliary pieces 41 and 42 are set to the same dimensions, and when the unfolded posture as shown in FIG. 1, the thickness dimensions (H4) of both auxiliary pieces 41 and 42 are set to the auxiliary portion 2. It becomes the thickness dimension.

The urethane block 44 constituting the first auxiliary piece 41 located on the left side in FIG. 1 is formed in a square block shape having eight corners, and the outer shape of the first auxiliary piece 41 based on the urethane block 44. The shape is also the same (square block shape). The urethane block 45 constituting the second auxiliary piece 42 located on the right side in FIG. 1 is divided into a first urethane block 45A located on the rear side and a second urethane block 45B located on the front side inside the urethane block 45. .. The first urethane block 45A is formed in a substantially quadrant shape in a cross-sectional view and is long in the left-right direction, and the second urethane block 45B is formed in a rectangular block shape formed in a rectangular shape in a cross-sectional view. ing. The second auxiliary piece 42 containing the first and second urethane blocks 45A and 45B is formed in a deformed block shape having a curved surface 50 that slopes downward in the rear direction between the upper surface and the rear side surface. There is. The urethane block 44 of the first auxiliary piece 41 and the second urethane block 45B of the second auxiliary piece 42 are formed of the same urethane, and the first urethane block 45A of the second auxiliary piece 42 is the second urethane. It is made of urethane, which is softer than block 45B. Here, the urethane block 44 of the first auxiliary piece 41 and the second urethane block 45B of the second auxiliary piece 42 are formed of high-density urethane having high resilience, and the first urethane block 45A of the second auxiliary piece 42. Is made of urethane having a lower impact resilience and a lower density than the second urethane block 45B.

The surface material 46 of the first auxiliary piece 41 and the surface material 47 of the second auxiliary piece 42 are made of the same material. In this embodiment, it is made of the same material as the surface material 19 of the main body 1 (the surface material 19A covering the upper surface of the first main body piece 11). The surface material 46A located on the lower surface of the first auxiliary piece 41 and the surface material 47A located on the lower surface of the second auxiliary piece 42 are formed of a single piece of cloth, and the surface material relating to the boundary between the two lower surfaces. Is a hinge portion 43 that connects the first auxiliary piece 41 and the second auxiliary piece 42.

From the above configuration, the auxiliary portion 2 can be displaced with respect to the hinge portion 43 as shown in FIG. More specifically, the auxiliary portion 2 has a folding posture in which the first auxiliary piece 41 and the second auxiliary piece 42 are overlapped as shown in FIGS. 4 to 6, and the first auxiliary portion 2 is shown in FIGS. 1 and 2. The posture can be appropriately displaced between the auxiliary piece 41 and the unfolded posture in which the second auxiliary piece 42 is spread in the front-rear direction. In the folded posture, the two surfaces (lower surfaces) of the two auxiliary pieces 41 and 42 facing each other with the hinge portion 43 in between overlap with each other. In the unfolded posture, each of the two surfaces of the two auxiliary pieces 41 and 42 facing each other with the hinge portion 43 in between is directed downward.

In the sofa bed having the above configuration, the main body 1 is in the unfolded posture as shown in FIGS. 1 and 2, and then the main body 1 is unfolded between the second main body piece 12 and the floor surface F. This sofa bed can be used as a mattress bed by installing the auxiliary portion 2 in the posture. Further, from the state of the mattress bed, the second main body piece 12 is placed on the first main body piece 11 of the main body portion 1 to take a folding posture as shown in FIG. 6, and then on the second main body piece 12. This sofa bed can be used as a sofa by placing the auxiliary portion 2 as a backrest portion. At this time, the folding posture of the auxiliary portion can be selected from the lying posture as shown in FIG. 4 and the upright posture as shown in FIG. The posture of the auxiliary portion 2 is appropriately selected according to the height of the backrest portion and the width of the seating surface desired by the user, but in any posture, the second auxiliary piece having low rebound resilience and excellent cushioning property. Since the curved surface 50 having the first urethane block 45A of 42 is located at the rear upper part (the upper part on the front side of the sofa), the burden on the user's neck can be reduced. In the sideways posture, the upper surface of the first auxiliary piece 41 (the upper surface of the first auxiliary piece 41 in the deployed posture of FIG. 1) is the lower surface of the second main body piece 12 serving as the seating surface (in the deployed posture of FIG. 1). It is in contact with the lower surface of the second main body piece 12. In the upright posture, the rear surface of the first auxiliary piece 41 and the front surface of the second auxiliary piece (the rear surface of the first auxiliary piece 41 and the front surface of the second auxiliary piece in the deployed posture of FIG. 1) are the seating surfaces of the second main body. It is in contact with the lower surface of the piece 12 (the lower surface of the second main body piece 12 in the unfolded posture of FIG. 1).

When used as a mattress bed, it is desirable that the top surface of the bed be flat. Therefore, in the sofa bed of the present embodiment, the total value of the thickness dimension (H1) of the first main body piece 11 and the height dimension (H2) of the leg portion 14 and the thickness dimension (H3) of the second main body piece 12 The total value with the thickness dimension (H4) of the auxiliary portion 2 in the unfolded posture is set to be the same dimension, that is, the relational expression of "H1 + H2 = H3 + H4" is satisfied, whereby the sofa bed. It is possible to prevent a step from being generated between the upper surface of the first main body piece 11 and the upper surface of the second main body piece 12 when the bed is used as a mattress bed. Further, in the sofa bed of the present embodiment, the spring unit 26 of the first mattress 16 and the spring unit 30 of the second main body piece 12 are formed by the number of pocket coils 25 and 34 and the elasticity of each pocket coil 25 and 34. Since the spring unit has the same specifications and the thickness dimensions (T1 and T2) are set to be the same, the frame 15 is built in the first main body piece 11, and the thickness dimensions of the two main body pieces 11 and 12 are different. However, it is possible to make the cushioning properties of both main body pieces 11 and 12 uniform. Further, in the sofa bed of the present embodiment, the urethane sheet 17 as a cushioning material arranged on the upper surface of the spring unit 26 of the first mattress 16 and the cushion arranged on the upper surface of the spring unit 30 of the second main body piece 12. Since the urethane sheet 31 as a material was formed of a cushion material having the same material and the same thickness dimension and having the same specifications, the spring units 26 and 30 of the first mattress 16 and the second main body piece 12 were made to have the same specifications. In combination with this, it is possible to further make the cushioning properties of both main body pieces 11 and 12 uniform.

In addition, in the sofa bed of the present embodiment, the thickness dimension (H3) of the second main body piece 12 is smaller than the thickness dimension (H1) of the first main body piece 11 in the vertical direction. In combination with the provision of the leg portion 14 below, the thickness dimension (H4) of the auxiliary portion 2 that becomes the backrest portion when used as a sofa is increased, and the cushioning property is improved by that amount. Can be done. In particular, in the sofa bed of the present embodiment, since the auxiliary portion 2 in the folded posture is used as the backrest portion of the sofa, the thickness dimension of the auxiliary portion 2 is increased by the amount of the folded posture, and the cushioning property of the backrest portion is increased. It is possible to improve the stage.

Since the front-rear and left-right dimensions of the auxiliary portion 2 in the unfolded posture are set to be the same as the front-rear and left-right dimensions of the second main body piece 12, when used as a mattress bed, the lower part of the second main body piece 12 When the auxiliary portion 2 is placed in the unfolded posture, it is possible to prevent the auxiliary portion 2 from protruding from the peripheral edge of the second main body piece 12. As a result, when used as a mattress bed, the entire lower surface of the second main body piece 12 can be supported by the auxiliary portion 2 in the unfolded posture, so that the second main body piece 12 may inadvertently wobble. , It is possible to stably support the second main body piece 12 by suppressing a part of the second main body piece 12 from sinking. Further, since it is possible to prevent the auxiliary portion 2 in the deployed posture from protruding from the peripheral edge of the second main body piece 12, the user does not feel a sense of discomfort when used as a mattress bed.

The thickness dimension (H1) of the first main body piece 11 is preferably 15 cm or more and 25 cm or less, and is set to 20 cm in this embodiment. The height dimension (H2) of the leg portion 14 is preferably 5 cm or more and 15 cm or less, and is set to 10 cm in this embodiment. The height dimension (H1 + H2) of the bed surface defined by the sum of the thickness dimension (H1) of the first main body piece 11 and the height dimension (H2) of the leg portion 14 is preferably 20 cm or more and 40 cm or less. , In this embodiment, it is set to 30 cm. The thickness dimension of the second main body piece 12 is preferably 0.5 times or more and 0.7 times or less of the thickness dimension of the first main body piece 11, and is set to 0.6 times (12 cm) in this embodiment. Has been done. The thickness dimension (H4) of the auxiliary portion 2 in the unfolded posture in this embodiment is set to 18 cm, and the thickness dimension of the auxiliary portion 2 in the folded posture is set to 36 cm. The front-rear dimensions of the first main body piece 11 and the second main body piece 12 in this embodiment are set to 100 cm, and the left-right dimensions are set to 100 cm, respectively. The front-rear dimensions of the first auxiliary piece 41 and the second auxiliary piece 42 constituting the auxiliary portion 2 in this embodiment are each set to 50 cm, and the left-right dimensions are set to 100 cm, respectively. The thickness dimensions of the urethane sheets 17, 18 and 31 are set to 2 cm (20 mm). The form of the mattress bed having the dimensions of the above embodiment is shown in FIG. 7, and the form of the sofa bed is shown in FIGS. 8 and 9.

The thickness dimensions and the like of the main body portion 1 and the auxiliary portion 2 constituting the sofa bed in the present invention are not limited to the above-mentioned dimensions, and in particular, the front-rear dimensions and the left-right dimensions can be changed to large or small.

1 Main body 2 Auxiliary part 11 1st main body piece 12 2nd main body piece 13 Hinge part 14 Leg part 15 Frame 16 1st mattress 17 Cushion material (urethane sheet)
25 Pocket coil 26 Spring unit 30 Spring unit 31 Cushion material (urethane sheet)
34 Pocket coil 41 Auxiliary piece (1st auxiliary piece)
42 Auxiliary piece (2nd auxiliary piece)
43 Hinge part F Floor surface H1 Thickness dimension of the first main body piece H2 Height dimension of the leg H3 Thickness dimension of the second main body piece H4 Thickness dimension of the auxiliary part in the unfolded posture

Claims (3)

A square block-shaped first main body piece (11) whose upper and lower surfaces are formed on a flat surface, legs (14) extending downward from the lower surface of the first main body piece (11), and front and rear and left and right dimensions of the first main body. A square block shape with the front and rear and left and right dimensions of the piece (11) set to be the same, and the thickness dimension in the vertical direction set to be smaller than that of the first main body piece (11), and the upper and lower surfaces are formed on a flat surface. Folding that includes a second main body piece (12) and a hinge portion (13) that connects both main body pieces (11 and 12), and a second main body piece (12) is superposed on the first main body piece (11). The main body (1) configured so that the posture can be displaced between the posture and the unfolded posture in which both main body pieces (11 and 12) are spread out.
It is provided with two auxiliary pieces (41.42) having the same thickness dimension in the vertical direction and a hinge part (43) connecting both auxiliary pieces (41.42), and both auxiliary pieces (41.42). The second main body piece (1) is configured so that the posture can be displaced between the folded posture in which the two auxiliary pieces (41 and 42) are stacked and the unfolded posture in which both auxiliary pieces (41 and 42) are expanded. An auxiliary portion (2) that is placed in a folded posture above the 12) or placed in a deployed posture below the second main body piece (12) when the main body portion (1) is in the deployed posture.
With
An elastic element is built in each of the first main body piece (11), the second main body piece (12), and the auxiliary piece (41.42). By installing the auxiliary part (2) in the unfolded posture between the main body piece (12) and the floor surface (F), it can be used as a mattress bed, and the main body (1) is in the folded posture. By placing the auxiliary part (2) on the main body part (1) as a backrest part, it can be used as a sofa.
The total value of the thickness dimension (H1) of the first main body piece (11) and the height dimension (H2) of the leg portion (14), and the thickness dimension (H3) of the second main body piece (12) and the unfolded posture were set. The total value with the thickness dimension (H4) of the auxiliary part (2) at the time is set to the same dimension.
The first body piece (11) includes a frame (15) supported by the legs (14) and a first mattress (16) arranged on the frame (15).
The first mattress (16) and the second main body piece (12) elastically form a spring unit (26.30) having a group of pocket coils (25.34) arranged adjacent to each other in a matrix in the front-rear direction and the left-right direction. Prepare as an element
The spring unit (26) of the first mattress (16) and the spring unit (30) of the second main body piece (12) have the number of pocket coils (25.34) and the elasticity of each pocket coil (25.34). , And a sofa bed characterized by being formed of spring units of the same specifications with the same thickness dimensions. The sofa bed according to claim 1, wherein the front-rear and left-right dimensions of the auxiliary portion (2) in the unfolded posture are set to be the same as the front-rear and left-right dimensions of the second main body piece (12). The first mattress (16) and the second main body piece (2) include a cushion material (17.31) arranged on the upper surface of each spring unit (26/30) as an elastic element.
The sofa bed according to claim 1 or 2, wherein both cushioning materials (17, 31) are formed of cushioning materials having the same material and the same specifications and having the same thickness dimension.

Images