Sofa bed and trailer

Abstract

To provide a sofa bed capable of preventing an indoor space from being cramped, and trailer including the sofa bed.SOLUTION: A sofa bed 70 includes a first frame body 71 and a second frame body 72 capable of advancing and retreating relative to the first frame body 71 in a horizontal direction, and the width of the sofa bed 70 in the advancing and retreating direction is variable by advancing and retreating with the upper surface of the first frame body 71 and the upper surface of the second frame body 72 maintaining at the same height. The first frame body 71 and the second frame body 72 each have a comb-tooth shape, comb teeth 712 of the first frame body 71 and comb teeth 722 of the second frame body 72 are alternately arranged side by side in a direction orthogonal to the advancing / retreating direction, the first frame body 71 and the second frame body 72 are configured in a nested manner, and the comb teeth 722 of the second frame body 72 are configured to be removable / insertable in the advancing / retreating direction with respect to the comb teeth 712 of the first frame body 71.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to sofa beds and trailers. [Background technology]

[0002] A sofa bed is provided in the trailer (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 3778885 Summary of the Invention [Problem to be solved by the invention]

[0004] A sofa bed occupies a certain area in the interior space of a trailer. Therefore, the sofa bed compresses the interior space of the trailer, so it is necessary to minimize the compression of the interior space of the trailer. The purpose of this disclosure is to provide a sofa bed that minimizes the compression of the interior space and a trailer equipped with such a sofa bed. [Means for solving the problem]

[0005] The present disclosure relates to a sofa bed comprising a first frame body and a second frame body that can move back and forth horizontally relative to the first frame body, wherein the width of the sofa bed in the direction of movement can be changed by moving back and forth while maintaining the upper surfaces of the first frame body and the second frame body at the same height. [Brief explanation of the drawings]

[0006] [Figure 1] 1 is a front perspective view of a trailer according to an embodiment of the present invention; [Figure 2] FIG. 1 is a perspective view of a trailer according to an embodiment, as seen from the rear. [Figure 3] FIG. 1 is a perspective view showing a sofa bed being used as a bed in the interior space of a trailer according to an embodiment. [Figure 4] FIG. 1 is a perspective view showing a sofa bed being used as a sofa in the interior space of a trailer according to an embodiment. [Figure 5] 1 is a perspective view showing a state in which a writing desk and a partition are used in an interior space of a trailer according to an embodiment. FIG. [Figure 6] 1 is a cross-sectional view showing a state in which the writing desk is not in use in the front portion of a trailer according to an embodiment. FIG. [Figure 7] 1 is a cross-sectional view showing a state in which a writing desk is used in the front portion of a trailer according to an embodiment. FIG. [Figure 8] FIG. 2 is a cross-sectional view showing a state in which a partition is not used in the front portion of a trailer according to an embodiment. [Figure 9] 1 is a cross-sectional view showing a state in which a partition is used in the front portion of a trailer according to an embodiment. [Figure 10] FIG. 2 is a cross-sectional view showing the front portion of the trailer according to the embodiment. [Figure 11] FIG. 1 is a top perspective view showing the sofa bed of a trailer in one embodiment being used as a bed. [Figure 12] FIG. 1 is a bottom perspective view showing the sofa bed of the trailer of one embodiment being used as a bed. [Figure 13] FIG. 1 is a top perspective view of a trailer sofa bed in one embodiment, showing the mattress removed and in use as a bed. [Figure 14] FIG. 1 is a top perspective view showing the sofa bed of a trailer in one embodiment being used as a sofa. [Figure 15] FIG. 1 is a bottom perspective view showing the sofa bed of the trailer of the embodiment being used as a sofa. [Figure 16]FIG. 10 is a top perspective view showing the sofa bed of the trailer of the embodiment in use as a sofa with the drawer pulled out. [Figure 17] FIG. 1 is a top perspective view of a trailer sofa bed in one embodiment, showing the mattress removed and in use as a sofa. [Figure 18] FIG. 10 is a perspective view showing a curved portion of one embodiment. [Figure 19] FIG. 10 is a rear view showing a state in which the curved portion of the embodiment is fixed to the curved wall portion. [Figure 20] FIG. 2 is a bottom perspective view showing the ceiling of the trailer according to the embodiment. [Figure 21] FIG. 1 is a bottom perspective view showing a state in which a lighting fixture is attached to a duct rail on the ceiling of a trailer according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0007] Hereinafter, an embodiment of the present disclosure will be described in detail with reference to the drawings. The trailer 1 constituting the vehicle in this embodiment is a trailer having a single-room interior space without a toilet room, which is common in small camper trailers. In the following description, when viewed from the center position of the trailer 1, the side where the coupling part 11 is provided is defined as the front side, the side where the tailgate 34 is provided is defined as the rear side, the side where the ceiling 31 is provided is defined as the upper side, and the side where the bottom wall part 32 is provided is defined as the lower side.

[0008] As shown in Figures 1 and 2, the trailer 1 has a chassis 10 formed to extend in the fore-and-aft direction, and a cargo box 30 that is approximately rectangular and elongated in the fore-and-aft direction and is detachably attached to the top of the chassis 10. The trailer 1 is towed by a vehicle or the like (not shown). The chassis 10 has a coupling part 11 at its front end. The coupling part 11 can be coupled to a vehicle (not shown).

[0009] Two wheels 12, one on each side, are rotatably attached to the front-to-rear center of the chassis 10. This allows the trailer 1 to move freely in the front-to-rear direction, and the trailer 1 can be moved manually. Also, for example, the wheels 12 may be drivingly connected to an electric motor (not shown) described below, which is driven by the electric motor to rotate the wheels 12 and move the trailer 1. Also, for example, each wheel 12 may be movable up and down relative to the chassis 10.

[0010] The upper and middle parts of the chassis 10, excluding the lower parts of the wheels 12, are covered by a cover 13 that can be attached to and detached from the chassis 10. Therefore, only the lower parts of the wheels 12 are exposed to the outside.

[0011] The cargo box 30 has a ceiling 31, a bottom wall 32, a front wall 33, a tailgate 34, a left side wall 35, and a right side wall 36, which define an enclosed interior space. The cargo box 30 is fixed to the chassis 10 by fixing the bottom wall 32 to the chassis 10.

[0012] A portion of the ceiling 31 has a skylight 311, through which light can be introduced into the interior space. In addition, lighting devices (not shown) are provided at the four corners of the ceiling 31. A curved wall portion 37 is provided at the connection portion between the ceiling 31 and the left side wall portion 35 and at the connection portion between the ceiling 31 and the right side wall portion 36. As shown in FIG. 1 etc., the curved wall portion 37 connects the ceiling 31 and the left side wall portion 35 with a wall portion having a curved surface, and also connects the ceiling 31 and the right side wall portion 36 with a wall portion having a curved surface, thereby forming the interior space of these portions into a curved interior space.

[0013] As shown in Figures 8 and 9, front wall 33 has upper storage space 335, middle storage space 337, and lower storage space 331L as indoor storage spaces, and lower storage space 331R as outdoor storage space. Upper storage space 335 and middle storage space 337 are partitioned by horizontal wall 3381. Upper storage space 335 and middle storage space 337 are open toward the indoor space, and the opening of upper storage space 335 is closed by lid 3341, which serves as an upper lid and constitutes an inner lid having multiple slits, as shown in Figure 7.

[0014] The design of the lid portion 3341 in which the multiple slits are formed is designed to match the design of the portions located on both the left and right sides of the lid portion 3341, and the design formed by the multiple plate members 52 provided in the left wall portion 35 and the right wall portion 36 connected to these portions. Therefore, as shown in Figures 7 and 8, this portion is designed so that the multiple plate members having the same width as the plate members 52 (see Figure 8, etc.) and the slits having the same width as the gaps between the plate members 52 from the left wall portion 35 to the right wall portion 36 appear to be continuous with the plate members 52 and the gaps between the plate members 52. The opening of the central storage space 337 is closed by the lid portion 3342 (writing desk 3342) and the lid portion 3346 (partition 3346) serving as lower lid portions that constitute a pair of inner lid portions that can be separated into left and right halves.

[0015] As shown in Figure 10 and other figures, an indoor unit 3361 of an air conditioner is stored in the upper storage space 335. A pipe member 3362 (see Figure 10) that connects the indoor unit 3361 to an outdoor unit 333 of the air conditioner (described below) is stored in the space between the front wall 3353 of the upper storage space 335 (see Figures 5, 6, etc.) and the front wall 3373 of the middle storage space 337 and the front wall portion 33. The upper storage space 335 and the middle storage space 337 can store different items.

[0016] The lower storage space 331 and the middle storage space 337 are partitioned by a horizontal wall 3382. Therefore, the middle storage space 337 and the lower storage space 331 are blocked from communicating with each other. As shown in FIGS. 3 to 9, the gap between the plate members 52 is appropriately adjusted so that the left and right ends of the upper surface of the wall member 3382 are aligned with the lower edges 521 of predetermined plate members 52, respectively.

[0017] The middle storage space 337 is divided by a dividing wall 3371 into a left middle storage space 337L and a right middle storage space 337R.

[0018] 5 and other figures, a writing desk 3342 is provided at the opening of right-side middle storage space 337R, which is part of the opening of middle storage space 337, as a lower lid (desk lid) that forms an inner lid and also forms a stand on which items can be placed and that can be used as a desk. Writing desk 3342 is connected by drop hinge 5344 (see FIG. 5) to the rear end of a back panel 3343 fixed to wall portion 3382, and is supported rotatably relative to back panel 3343 about a rotation axis oriented horizontally.

[0019] When using the writing desk 3342, it can be rotated around the rotation axis of the drop hinge 5344, whose rotation axis is oriented horizontally, to the horizontal position shown in Figures 5 and 7. As a result, when using the right-side central storage space 337R, the writing desk 3342 can be rotated to open the lower lid that was covering the right-side central storage space 337R, allowing it to function as a writing desk. When the writing desk 3342 is in the horizontal position, the height from the floor defined by the upper surface of the bottom wall 32 of the writing desk 3342 is approximately 700 mm.

[0020] When the writing desk 3342 is not in use, it can be stored in the vertical position shown in Figures 3, 4, and 6, blocking the opening of the right-side central storage space 337R. At this time, the left and right portions of the upper end of the writing desk 3342 are fixed to the side constituent part 3383 and the dividing wall part 3371, which are fixed to the right side wall part 36 and adjacent to the writing desk 3342, respectively, by flat latches 3384 and 3684 shown in Figures 6 and 7.

[0021] As shown in Fig. 5, the lower ends of rectangular stays 5345 are fixed to both the left and right ends of the writing desk 3342. The guide portions 5346 of the rectangular bars in the middle of the rectangular stays 5345 are respectively engaged with the side wall portion 3583 and the dividing wall portion 3371 fixed to the right wall portion 36 that forms the right-side central storage space 337R. As shown in Figs. 5 and 7, the rectangular stays 5345 support the writing desk 3342 when the writing desk 3342 is in a horizontal position. This makes it possible to apply a load of, for example, approximately 50 kg to the writing desk 3342 when it is in a horizontal position.

[0022] 7 and 8, a plurality of downlights 5347 are provided above the writing desk 3342, which is in a horizontal position. The downlights 5347 are arranged on the underside of the wall portion 3381, at positions above the front end portion of the writing desk 3342. The downlights 5347 can illuminate the upper surface of the rear panel 3343 and the upper surface of the writing desk 3342.

[0023] Furthermore, a through-hole 3351 is formed in the wall 3381 behind the portion where the downlight 5347 is provided. The air from the indoor unit 3361 is configured to flow through the through-hole 3351 into the indoor space as well as through the multiple slits of the lid 353341.

[0024] As shown in Figures 3 to 7, the opening of the left-side middle storage space 337L, which is the other part of the opening of the middle storage space 337, is provided with a partition 3346 as a lower lid (partition lid) that forms an inner lid and also serves as a partition separating the opening side of the right-side middle storage space 337R from the opening side of the left-side middle storage space 337L.

[0025] Partition 3346 is connected to the rear end of dividing wall 3371 by hinge 5401 (see FIG. 9) and is supported rotatably about a rotation axis oriented in the vertical direction (perpendicular direction) relative to dividing wall 3371. As a result, when using left-side central storage space 337L, partition 3346 can be rotated to open the lower lid that covers left-side central storage space 337L, allowing it to function as a partition. Furthermore, when functioning as a partition, it is possible to avoid interference with the opening and closing of door 351.

[0026] A latch 5402 is provided on the top of partition 3346. Latch 5402 is engageable with latch receiver 5403 fixed to the front side of lid 3341. When partition 3346 rotates relative to dividing wall 3371 and enters a fully open state separating the opening side of right-side central storage space 337R from the opening side of left-side central storage space 337L, latch 5402 engages with latch receiver 5403. This prevents partition 3346 from freely rotating, making it possible to maintain the state in which the opening side of right-side central storage space 337R is separated from the opening side of left-side central storage space 337L.

[0027] It is possible to separate the left-side central storage space 337L, which is provided with a sink 61 having a sink (described below), and the right-side central storage space 337R, which is provided with a writing desk 3342, with a partition 3346, thereby separating the workspace with the writing desk 3342 and the sink space with the sink 61. As a result, it is possible to work in each space without being concerned about the other spaces, and it is possible to avoid being concerned about work in the sink space when working in the workspace.

[0028] When the partition 3346 is not in use, it can be stored flush with the writing desk 3342, blocking the opening of the left-side central storage space 337L, as shown in FIGS. 3, 4, and 8. At this time, a magnet receptacle 5405 (see FIG. 9) provided at the left end of the upper end of the partition 3346 is attracted to and fixed by a magnet 5404 (see FIG. 10) fixed to a side component 3385 fixed to the left wall 35. At this time, the wall 3382 extends slightly rearward beyond the lower door 3347 (see FIG. 4) when the writing desk 3342 and partition 3346 are closed, as shown in FIGS. 3 and 4. This increases the strength of the writing desk 3342 when it is open. In addition, when partition 3346 is open as shown in Figure 5, the area in front of the sink in left-side central storage space 337L can be used widely, and when partition 3346 is closed as shown in Figures 3 and 4, space can be secured on wall portion 3382 to place small items, etc.

[0029] The left-side central storage space 337L is provided with a sink 61. The sink 61 is configured as an integrated unit that combines a sink, a faucet, and a drain. When the sink 61 is not in use, the top of the sink is covered with a lid, and the sink, faucet, and drain are hidden.

[0030] The lower storage space 331 is divided into a left lower storage space 331L and a right lower storage space 331R by a dividing wall 3310. A lower door 3347 serving as a lower lid that constitutes the inner lid is provided at the opening of the lower storage space 331L, which is located below the left middle storage space 337L, as shown in Figures 3 to 5, 8, 9, etc.

[0031] The lower door 3347 is connected to the rear end of the dividing wall 3310 by a hinge 5401 (see FIG. 9), and is supported by the dividing wall 3310 so as to be rotatable about a rotation axis oriented in the vertical direction.

[0032] When the lower door 3347 is not opened, it can be stored by blocking the opening of the left lower storage space 331L, as shown in Figures 3 to 5 and 8. At this time, a magnet seat 5405 provided at the left end of the upper end of the lower door 3347 is attracted to and fixed by a magnet (not shown) fixed to a side component 3387 fixed to the left wall 35.

[0033] 10, the left lower storage space 331L has a tank storage section that stores the water supply and drainage tank 62, and a battery storage section that stores the battery 63. The water supply and drainage tank 62 is disposed vertically below the sink 61, and is connected to the faucet of the sink 61 and the drain outlet of the sink. The battery 63 is disposed to the left of the water supply and drainage tank 62, and is connected to electrical wiring to supply electricity used in the trailer 1.

[0034] The lower storage space 331R is open toward the outside in the front direction of the interior space, and the opening of the lower storage space 331R is closed by a protruding lid portion 332 (see FIG. 1) serving as an outer lid portion. The protruding lid portion 332 is configured to be openable and closable by rotating around the upper edge of the protruding lid portion 332 as the axis of rotation. The outer surface of the protruding lid portion 332 can be made flush with the outer surface of the front wall portion 33. An outdoor unit 333 of the air conditioner is housed in the lower storage space 331R.

[0035] As a result, the upper storage space 335 inside the cargo box 30 and the right-side middle storage space 337R are separated by a horizontal wall portion 3382 below them so that they cannot communicate with each other, and the right-side lower storage space 331R outside the cargo box 30 is arranged on the same line, thereby realizing a structure in which the right-side lower storage space 331R outside the cargo box 30 is enclosed within the outer casing of the cargo box 30. This creates new space in the front portion of the trailer 1 and makes it possible to improve the design of the right-side lower storage space 331R outside the cargo box 30.

[0036] As described above, the indoor unit 3361 of the air conditioner, the outdoor unit 333, the sink space, and the desk space are all concentrated in the front section of the trailer 1, which allows for maximum efficiency in using the limited interior space of the trailer 1. Furthermore, these items can be stored in the front section in a noiseless manner with an improved design.

[0037] 2, the tailgate 34 serving as the rear door is configured to be divided into two parts: an upper gate portion 3431 serving as the upper door, and a lower gate portion 3432 serving as the lower door. Specifically, the upper gate portion 3431 is connected to the rear end portion of the ceiling 31 by a plurality of hinges. The lower gate portion 3432 is connected to the rear end portion of the bottom wall portion 32 by a plurality of hinges.

[0038] Therefore, when the upper gate portion 3431 and the lower gate portion 3432 are in the open state, the lengths by which the upper gate portion 3431 and the lower gate portion 3432 protrude rearward can be made the same but short. This makes it possible to open and close the tailgate 34 in a space-saving manner at the rear of the trailer 1. As a result, the trailer 1 can be moved and used in various locations, improving the usability of the trailer 1. Furthermore, when connecting the rear opening of the trailer 1 to the deck of a building, the lower gate portion 3432 can also be connected to the deck of the building with the upper gate portion 3431 abutting the exterior wall of the building. This makes it possible to design a trailer 1 that is easy to connect to the deck of a building.

[0039] As described above, the lower gate portion 3432 is connected to the rear end portion of the bottom wall portion 32 by a plurality of hinges, and therefore, when rotated to a horizontal position in which the rear opening of the packing box 30 is open, it is in a torque-free state in which no torque is applied so as to maintain the horizontal state. When the lower gate portion 3432 is lifted and begins to rotate about the rotation axis of the hinge, torque is applied to the lower gate portion 3432 so as to lift it, and it is configured to rotate until it reaches a vertical position in which the rear opening of the packing box 30 is closed, as shown in FIG. 2.

[0040] The right side wall 36 is formed of a wall without a window. The left side wall 35 is provided with a door 351 and a projection window 352. The door 351 is provided near the front of the trailer 1 (the side of the coupling portion 11 of the trailer 1). The door 351 is configured to be able to be opened and closed by rotating around a vertical frame near the front of the trailer 1 as the axis of rotation. The projection window 352 is configured to be able to be opened and closed by rotating around the upper end of the projection window 352 as the axis of rotation. The projection window 352 is supported by a gas spring so that it can be maintained in a fully open state.

[0041] A pillar member 51 is provided in the interior space of the packing box 30. The pillar member 51 is made of wood, and as shown in FIG. 18 , has a curved portion 511, a ceiling-side linear portion 512, and a sidewall-side linear portion 513. The ceiling-side linear portion 512 and the sidewall-side linear portion 513 are connected to both ends of the curved portion 511. The curved portion 511 is formed in a shape that follows the inner surface of the curved wall portion 37 and is disposed along the inner surface of the curved wall portion 37. The ceiling-side linear portion 512 is formed in a shape that follows the inner surface of the ceiling 31 and is disposed along the inner surface of the ceiling-side linear portion 512. The sidewall-side linear portion 513 is formed in a shape that follows the inner surface of the left side wall portion 35 or the right side wall portion 36 and is disposed along the inner surface of the left side wall portion 35 or the right side wall portion 36.

[0042] The surface of curved portion 511 facing the interior of the room has a flat surface 5111 for fixing a board material and a flat surface 5112 for forming a gap. As shown in Fig. 6, flat surface 5111 for fixing a board material is a flat surface capable of fixing a rectangular, flat wooden board material 52, and board material 52 is fixed thereto. Flat surface 5112 for forming a gap is located between adjacent flat surfaces 5111 for fixing a board material, and is disposed adjacent to these flat surfaces 5111 for fixing a board material.

[0043] Therefore, gaps are formed between adjacent plate materials 52 among the plurality of plate materials 52 fixed to the curved portion 511. Similarly, gaps 514 are formed in the ceiling-side linear portion 512 and the side-wall-side linear portion 513, and a plurality of plate materials 52 are fixed thereto. Therefore, as shown in FIG. 19 , a plurality of plate materials 52 are arranged with gaps 514 formed across the entire inner surface of the ceiling 31, the inner surface of the left wall portion 35, and the inner surface of the right wall portion 36, except for parts of the door 361 and the projection window 362.

[0044] Furthermore, because the plate members 52 are fixed to the ceiling-side linear portion 512 and the sidewall-side linear portion 513, gaps are formed between the ceiling 31 and the plate members 52 fixed to the ceiling-side linear portion 512, and between the left side wall portion 35, the right side wall portion 36 and the plate members 52 fixed to the sidewall-side linear portion 513. This makes it possible to use these gaps to attach carabiner or hook members (not shown). As a result, it becomes possible to support a surfboard on the hook member or hang a net or lantern on the carabiner (not shown).

[0045] Furthermore, since the plate material 52 can be fixed to the flat surface 5111 for fixing the plate material, the positioning of the plate material 52 with respect to the curved portion 511 can be easily performed, improving the workability of the planking process of fixing the plate material 52 to the curved portion 511. Furthermore, since the curved portion 511 and the plate material 52 are made of wood, the column member 51 and the plate material 52 can be made of synthetic wood, which has good workability and is suitable for cutting, and this can further improve the workability of the planking process of fixing the plate material 52 to the column member 51. In other words, it is possible to produce the column member 51 using a cutting machine and shorten the on-site fitting work of fitting the curved portion 511 to the curved wall portion 37, and to realize an interior with a highly designed design.

[0046] Furthermore, because the curved portion 511 is connected to the ceiling-side straight portion 512 and the side-wall-side straight portion 513, these portions make it possible to configure the column member 51 that extends from the ceiling 31 to the left side wall portion 35 and the right side wall portion 36. Therefore, by fixing and providing plate material 52 to the ceiling-side straight portion 512 and the side-wall-side straight portion 513 as well as to the curved portion 511, the plate material 52 can be stretched over the entire inner surface of the ceiling 31, the left side wall portion 35, the right side wall portion 36, and the curved wall portion 37 that form the interior space, thereby surrounding the interior space and improving the design of the interior side of the packing box 30.

[0047] As shown in Fig. 20, a duct rail 312 is provided in a gap 514 between boards 52 on the inner surface of ceiling 31. As shown in Fig. 21, a lighting fixture 313 is attached to duct rail 312. In this way, gap 514 can be used as a space for attaching lighting fixture 313.

[0048] A pair of wheel wells 14 are provided on the bottom wall portion 32, protruding upward and accommodating the upper portions of the wheels 12. A sofa bed 70 is provided on the right wheel well 14, and the right wheel well 14 is entirely covered by the sofa bed 70.

[0049] The sofa bed 70 comprises a first frame body 71, a second frame body 72, and a mattress M. The first frame body 71 comprises side frames 711 and an upper plate 712. The side frames 711 are made up of C-shaped plate-like side plates, and the C-shape opens toward the right wheel well 14. The upper plate 712 is made up of a rectangular plate material. A plurality of upper plates 712 are arranged in the front-to-rear direction of the trailer 1 at intervals equal to the width of the upper plates 712 and fixed to the side frames 711. As a result, gaps are formed between adjacent upper plates 712, and the first frame body 71 has a comb-tooth shape when the plurality of upper plates 712 are considered to be comb teeth.

[0050] Drawers 73 are provided on the left side surface of side frame 711. Drawers 73 are respectively arranged in two openings formed on the left side surface of side frame 711, and can be pulled out to the left and pushed in to the right with respect to first frame body 71. This makes it possible to use drawers 73 for storage.

[0051] The second frame 72 includes a side frame 721, an upper plate 722, and an upper base plate 723. The side frame 721 has a C-shaped plate-like side plate 7211, with a recess 7212 recessed in the center along the tire housing 14. The C-shape opens to the left, which is the direction of the left tire housing 14. The recess 7212 is disposed on the tire housing 14 so as to cover the entire tire housing 14. An extending plate portion 7213 is provided in the center of the recess 7212 and is parallel to the vertical direction, extending leftward, which is the direction of the left tire housing 14. In the vertical direction, the lower end of the extending plate portion 7213 is aligned with the lower end of the side frame 721 and abuts against the bottom wall portion 32. The extending plate portion 7213 improves the strength of the second frame 72, thereby improving the strength of the sofa bed 70.

[0052] The upper base plate 723 is formed in a rectangular plate shape and covers the entire upper side of the C-shaped side plate 7211. The upper plate 722 is formed from a rectangular plate material of the same shape as the upper plate 712. A plurality of upper plates 722 are arranged in the longitudinal direction of the trailer 1 at intervals equal to the width of the upper plates 722 and fixed to the upper base plate 723. As a result, gaps are formed between adjacent upper plates 722 on the upper base plate 723, and the second frame 72 has a comb-tooth shape when the plurality of upper plates 722 are considered to be comb teeth. The upper plates 712 of the first frame 71 are arranged one by one in the gaps between adjacent upper plates 722 on the upper base plate 723. Therefore, the upper plates 712 and the upper plates 722 are arranged alternately in the longitudinal direction of the trailer 1.

[0053] The first frame body 71 and the second frame body 72 are configured to be nested. Specifically, while maintaining the state in which the top plates 712 and 722 are alternately arranged, the top plate 712 is configured to be able to move relative to the top plate 722 in the left-right direction of the trailer 1 in the gap between adjacent top plates 722 on the top plate base plate 723. As a result, during this movement, the top surfaces of the top plates 712 and 722 can always be maintained at the same height, and in this state, the second frame body 72 having the top plate 722 and side frames 721 can move horizontally in the left-right direction of the trailer 1 relative to the first frame body 71 having the top plate 712 and side frames 711.

[0054] For this reason, when the second frame body 72 is moved relative to the first frame body 71, no steps are created on their upper surfaces, so that the second frame body 72 can be easily moved relative to the first frame body 71 with the mattress M placed on their upper surfaces, allowing the sofa bed to be used as a sofa or as a bed. Also, since there are no steps on the upper surfaces of the first frame body 71 and the second frame body 72, there is no need to raise or lower one of the frames to make the upper surface of the sofa bed flat, which makes it easier to move the first frame body 71 when changing the sofa bed from a bed to a sofa and from a sofa to a bed, thereby improving operability.

[0055] As the first frame body 71 and the second frame body 72 move closer to each other, the side frame 721 of the second frame body 72 changes from the state shown in FIG. 13 to the state shown in FIG. 17, allowing the side frame 721 of the second frame body 72 to be stored inside the side frame 711 of the first frame body 71. That is, the comb-tooth-shaped second frame body 72 can be inserted or removed from the comb-tooth-shaped first frame body 71 in the forward / backward direction, which is the direction of movement of the second frame body 72 relative to the first frame body 71. This movement allows the width of the sofa bed 70 to be adjusted. As shown in FIG. 13, when the second frame body 72 is removed from the first frame body 71, the comb-tooth-shaped central portions of the frame overlap in the front-to-back direction. That is, the leading edge of the top plate 712 and the leading edge of the top plate 722 are adjacent to each other in the front-to-back direction. This increases the strength of the sofa bed 70.

[0056] The mat M includes a first mat M1 and a second mat M2. The first mat M1 and the second mat M2 are formed in the same shape, each a rectangular parallelepiped. The length of the first mat M1 and the second mat M2 is equal to the longitudinal length of the side frame 711 when the side frame 721 of the second frame 72 is housed inside the side frame 711 of the first frame 71, as shown in FIG.

[0057] The sum of the width of the first mat M1 and the thickness of the second mat M2 is equal to the width of the side frame 711 when the side frame 721 of the second frame 72 is stored inside the side frame 711 of the first frame 71, as shown in Fig. 17. This makes it possible to use the mattress as a sofa by placing the first mat M1 on the top surface of the first frame 71 when the side frame 721 of the second frame 72 is stored inside the side frame 711 of the first frame 71, and placing the second mat M2 against the inner surface of the right wall 36, as shown in Figs.

[0058] Furthermore, the sum of the width of the first mat M1 and the width of the second mat M2 is equal to the width of the sofa bed 70 when the side frames 721 of the second frame body 72 are pulled out from inside the side frames 711 of the first frame body 71, as shown in Fig. 13. This makes it possible to use the sofa bed 70 as a bed by placing the first mat M1 and the second mat M2 side by side on the upper surfaces of the first frame body 71 and the second frame body 72 when the side frames 721 of the second frame body 72 are pulled out from inside the side frames 711 of the first frame body 71, as shown in Figs. 11 and 12.

[0059] The present disclosure is not limited to the above-described embodiments, and includes modifications, improvements, etc. within the scope that can achieve the object of the present disclosure. For example, the configuration of the sofa bed is not limited to the configuration of the sofa bed 70 of this embodiment. For example, the sofa bed is not limited to a portable one such as a trailer, but may be installed in the interior space of a building. Furthermore, the skylight 311 does not have to be provided. Furthermore, the lighting fixture 313 is not limited to being placed at the four corners of the ceiling, but may be placed in any position. Furthermore, a window or door may be provided on the right side wall 36, and the door opening direction and window type are not limited to the door 351 opening direction and window type (projecting window 352) of this embodiment. For example, a sliding window, a casement window, or the like may be provided instead of the projecting window 352. Furthermore, the outdoor unit 333 and the battery 63 may not be placed in the lower storage space 331, but other items may be placed therein instead.

[0060] In addition, in this embodiment, the curved wall portions 37 are provided at the connection portion between the ceiling 31 and the left side wall portion 35 and the connection portion between the ceiling 31 and the right side wall portion 36, but the curved wall portions 37 do not have to be provided. Even in this case, it is sufficient that the pillar member has a ceiling-side straight portion 512 and a side-wall-side straight portion 513 at both ends of the curved portion 511.

[0061] Furthermore, in the present embodiment, the ceiling-side linear portion 512 and the side-wall-side linear portion 513 are connected to both ends of the curved portion 511, respectively, but the present invention is not limited to this configuration. For example, both ends of the curved portion 511 may be spaced apart from the ceiling-side linear portion 512 and the side-wall-side linear portion 513, forming a space therebetween. Furthermore, for example, the pillar member may have, at least one of both ends of the curved portion, either a ceiling-side linear portion that is arranged along the ceiling that forms the indoor space, or a side-wall-side linear portion that is arranged along the side wall that forms the indoor space.

[0062] Furthermore, in this embodiment, gaps are formed in the curved portion 511, the ceiling-side linear portion 512, and the side-wall-side linear portion 513, and the plurality of plate materials 52 are fixed thereto, but this is not limiting. For example, panel-like members in which plate materials 52 are fixed to the curved portion 511 to form a lattice between the curved portion 511 and the plate materials 52, or panel-like members in which plate materials 52 are fixed to short members of the ceiling-side linear portion 512 and the side-wall-side linear portion 513 to form a lattice between the members and the plate materials 52, may be prepared in advance and fitted together to create a configuration that looks as if gaps were formed in the curved portion 511, the ceiling-side linear portion 512, and the side-wall-side linear portion 513, and the plurality of plate materials 52 were fixed thereto to form a lattice, as in this embodiment. If gaps are not necessary, a single panel-like member (panel material) may be used instead. In addition, in this embodiment, the lid portion 3341 is a lattice-like lid portion with multiple slits formed therein, but this is not limiting. For example, the lid portion may be formed by attaching a lattice to a plate-like member, or the lid portion itself may be configured with projections and recesses so as to appear lattice-like.

[0063] Furthermore, the plate members 52 may be detachably attached to the curved portion 511, the ceiling-side linear portion 512, and the side-wall-side linear portion 513, thereby enabling various DIY arrangements. Also, for example, a panel-like member in which the plate members 52 are fixed to the curved portion 511 to form a lattice with the curved portion 511 and the plate members 52, or a panel-like member in which the plate members 52 are fixed to a short member of the ceiling-side linear portion 512 or a short member of the side-wall-side linear portion 513 to form a lattice with the member and the plate members 52 may be prepared in advance and then detachably fitted together.

[0064] In addition, in this embodiment, the pillar member 51 and the plate material 52 are made of wood, but this is not limited to this. For example, the plate material 52 may be made of resin, artificial wood, metal, or a combination of these. The plate material 52 and the duct rail 312 may or may not be provided. Furthermore, the upper gate portion 3431 and the lower gate portion 3432 are configured to have the same length in the vertical direction, but this is not limited to this. For example, the length of the upper gate portion may be longer than the length of the lower gate portion, and the length of the lower gate portion may be longer than the length of the upper gate portion. [Explanation of symbols]

[0065] 1 trailer, 33 front wall, 36 left side wall, 61 sink, 70 sofa bed, 71 first frame, 72 second frame, 73 drawer, 337 central storage space, 337L left central storage space (portion of interior storage space having other part of opening), 712, 722 upper board (comb teeth), 3342 writing desk (lower lid part (desk lid part)), 3346 partition (lower lid part (partition lid part)), 5402 latch, M mat, M1 first mat, M2 second mat

Claims

1. A first frame body; A sofa bed comprising: a second frame body that can move back and forth relative to the first frame body in a horizontal direction; The sofa bed has a width that can be changed in the direction of advancement and retreat by moving forward and backward while maintaining the upper surfaces of the first frame body and the second frame body at the same height.

2. the first frame and the second frame each have a comb-tooth shape, the comb teeth of the first frame body and the comb teeth of the second frame body are arranged alternately in a direction perpendicular to the direction of advancement and retreat, and the first frame body and the second frame body are configured in a nested shape, The sofa bed according to claim 1, wherein the comb teeth of the second frame body are configured to be insertable and removable in the advancing and retracting direction relative to the comb teeth of the first frame body.

3. 3. The sofa bed according to claim 2, wherein when the comb teeth of the second frame body are pulled out most in the direction of advance and retreat relative to the comb teeth of the first frame body, the tips of the comb teeth of the first frame body and the tips of the comb teeth of the second frame body are arranged alternately in a direction perpendicular to the direction of advance and retreat, and overlap.

4. The second frame body has a side frame and an extension plate portion extending from the side frame, The sofa bed according to claim 1, wherein the lower end of the side frame is aligned with the lower end of the extension plate portion in the vertical direction.

5. A first mat and a second mat are placed on the upper surface of the first frame and the upper surface of the second frame, 2. The sofa bed according to claim 1, wherein a bed is formed by placing the first mat and the second mat on the upper surface of the first frame body and the upper surface of the second frame body, and a sofa is formed by placing the first mat and the second mat against a wall adjacent to the second frame body.

6. 2. The sofa bed according to claim 1, wherein the first frame body is provided with a drawer that can be pulled out or pushed in in a direction parallel to the direction of advancement and retreat of the second frame body that advances and retreats relative to the first frame body.

7. A trailer equipped with the sofa bed according to claim 1.

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