Temporary bed

Abstract

This invention provides a simple bed that enhances the reliability of the locking mechanism that restricts the contraction of the bed frame and improves the stability of the bed without employing any special locking means. [Solution] When assembling the bed, the headboard 13 and footboard 14 are moved away from each other, causing the bed body 12 to extend. Consequently, the top plate 11 and sideboards 100 are unfolded so that their surfaces are flush with each other. Subsequently, the sideboards 100, which are rotatably connected to the widthwise ends of the top plate 11, are rotated downward to a hanging position. In addition to the main locking mechanism that restricts the contraction of the bed body 12 by the unfolded top plate 11 from above, the sideboards 100 become an auxiliary locking mechanism that restricts the contraction of the bed body 12 from the side. As a result, the reliability of the locking mechanism that restricts the contraction of the bed body 12 and the stability of the bed can be increased without employing any special locking means.

Description

TECHNICAL FIELD

[0001] The present invention relates to a cot that can be used, for example, in an evacuation shelter or the like at the time of a disaster. BACKGROUND ART

[0002] As a cot used by disaster victims in evacuation shelters at the time of disasters such as earthquakes and typhoons, for example, the cot described in Patent Document 1 is known. This conventional bed has two cot bodies each having a rectangular shape in plan view. Each cot body includes a bed main body in a grid-like beam pattern in which a plurality of square tubular bases (cells) are arranged vertically and horizontally in the internal space of a rectangular frame plate composed of front, rear, left, and right plates, and a top panel (floor panel) that can be bent in a V-shape around the intermediate position in the length direction, and whose both end portions in the length direction are connected to the left side plate and the right side plate of the partial bed main body.

[0003] When the bed is folded, in each cot body, the top panel is bent at the intermediate position in the length direction. As a result, the angles (inner angles) of the two opposing corners on one side of each base are deformed from a state of approximately 90 degrees to approach 0 degrees, and the angles (inner angles) of the other two opposing corners are deformed from a state of approximately 90 degrees to approach 180 degrees, so that the bed is folded. As a result, the square tubular space of each base is eliminated, so that the bed can be folded compactly and stored without requiring a large space.

[0004] On the other hand, when assembling the bed, each base returns to the square tubular shape simply by pushing the bent top panel in the direction of spreading. Thereby, each cot body can be easily assembled. The assembled cot bodies form a cot by connecting their abutting surfaces to each other.

[0005] Furthermore, when the bed is in use, the upper opening edge of each base contacts the underside of the top plate, supporting it. As a result, it does not easily deform even when the user's weight is applied, making it a durable and easy-to-use bed. Moreover, this conventional bed does not need to be discarded after use; it can be repeatedly assembled and folded for reuse, making it cost-effective.

[0006] However, the simple bed described in Patent Document 1 was composed of two simple bed units, making assembly and folding the bed cumbersome, and requiring individual management of each simple bed unit. Moreover, the simple bed, consisting of two simple bed units, was bulky even when folded, making it inconvenient to carry. Furthermore, because the left and right sides of both simple bed units are fitted with left and right panels, elderly users, for example, may have difficulty standing up because they cannot place their feet under the side of the bed.

[0007] Therefore, as a conventional technology that solves these problems, for example, the simple bed described in Patent Document 2 is known. The simple bed described in Patent Document 2 comprises a bed body that is extendable in the length direction of the bed, a top plate positioned on the upper side of the bed body, and a headboard and a footboard that are foldably connected to both ends of the top plate in the length direction of the bed, the top plate having a head side plate portion with two head side portion plates that can be folded in the length direction of the bed, a central plate portion, and a foot side plate portion having two head side portion plates that can be folded in the length direction of the bed, which are hinged to each other. Furthermore, since both ends of the bed frame are secured to the corresponding headboard or footboard, the entire simple bed can be folded into a book-like shape when stored.

[0008] When assembling the simple bed described in Patent Document 2, the two overlapping head-side panels and the two overlapping foot-side panels are raised, centered on the connecting portion of the central panel. Then, the headboard and footboard are moved in the length direction of the bed so that they separate from each other. As a result, the bed body extends, and each head-side panel and each foot-side panel are unfolded so that their surfaces are flush with each other. This assembles a simple bed in which a single large top panel is supported from below by the extended bed body.

[0009] At this time, the five large and small board sections that make up the top panel are laid out in a butt-jointed state with their surfaces flush with each other, while the upper ends of the headboard and footboard, which are attached to the ends of the bed frame in an upright position, are hinge-connected to both ends of the top panel in the length direction of the bed. Thus, these components together form a locking mechanism that restricts the contraction of the bed frame. [Prior art documents] [Patent Documents]

[0010] [Patent Document 1] Utility Model Registration No. 3232263 Gazette [Patent Document 2] Patent No. 7624177 [Disclosure of the Invention] [Problems that the invention aims to solve]

[0011] However, the simple bed described in Patent Document 2 employs a locking mechanism to restrict the contraction of the bed body, which consists of a top plate made up of a total of five board sections laid out in a butt joint state with their surfaces flush, and a headboard and footboard that hang down from both ends of the top plate in the length direction of the bed in a 90° folded state.

[0012] Therefore, while there is no problem with the user's weight or other force being applied to this top board, which serves as the bed base, if an upward external force is applied to a part of the top board for any reason, the flat shape of the top board, which is maintained by the butting of the board sections together, may be disrupted. This could cause the lock that restricts the contraction of the bed body to disengage, potentially shortening the overall length of the portable bed.

[0013] As a result of diligent research, the inventor discovered that by rotatably connecting a sideboard, which is foldable and unfoldable in conjunction with the expansion and contraction of the bed body, to the widthwise end of the top plate, when the top plate and sideboard are unfolded, simply positioning the sideboard in a downward-rotating position relative to the top plate allows this sideboard to act as an auxiliary locking mechanism that restricts the contraction of the bed body from the side, thereby resolving all of the aforementioned problems and completing the present invention.

[0014] This invention has been made in view of the above prior art, and aims to provide a simple bed that can improve the reliability of the locking mechanism that restricts the contraction of the bed body and the stability of the bed without employing any special locking means. [Means for solving the problem]

[0015] The invention described in claim 1 is a simple bed comprising a bed body that is extendable in the length direction of the bed, a top plate disposed on the upper side of the bed body, a headboard and a footboard rotatably connected to both ends of the top plate in the length direction of the bed, and a sideboard of the same length as the top plate rotatably connected to the end of the top plate in the width direction, The ends of the bed body in the length direction are hooked onto the corresponding headboard and footboard, respectively. Moreover, the bed body consists of multiple horizontally elongated rectangular support plates, namely the first support plate, the second support plate, and the third support plate. The first support plate has three elongated notches formed at predetermined intervals on one of its long sides, at both ends and in the middle of its length. The second support plate is approximately twice the length of the first support plate, and each second support plate has four parallel notched slits formed at a predetermined pitch from its right end to the left on one long side, and each second support plate has folds formed on one end, connecting to the corresponding headboard or footboard at both ends in the bed width direction. The third support plate has a length approximately 1.5 times that of the first support plate, and five elongated notched slits are formed parallel to each other at a predetermined pitch on one of the longer sides of each third support plate, including both ends. With the corresponding notched slits inserted into each other, when viewed from a plane perpendicular to the vertical direction of the support plate, the upward-facing group of eight parallel first to third support plates that slope upward to the right and the downward-facing group of eight parallel first to third support plates that slope downward to the right (the opposite orientation) are each hooked together in an intersecting manner. Furthermore, the positions of the ends of the support plates in the crossed state coincide with the respective ends of the top plate that is positioned on the upper surface side of the bed body. The top plate and the side board are configured to be foldable and unfoldable in conjunction with the expansion and contraction of the bed main body, In the unfolded state of the top plate, the top plate and the side board are each flush, and by simply arranging the side board at a hanging position near the side surface of the bed main body where the side board is pivoted downward relative to the top plate, the side board connected to the top plate restricts the collapse of the flush shape of the top plate, this is a portable bed characterized by that.

[0016] The portable bed referred to herein is, for example, one that can be used at evacuation shelters or the like in the event of a disaster. Its size is arbitrary. Examples include single size, semi-double size, double size, king size and the like. Although the load bearing capacity of the portable bed is not limited, it is preferably 180 kg to 300 kg. The bed main body may have any structure as long as it can expand and contract in the bed length direction. For example, it may be of an accordion type using multi-joint hinges or the like.

[0017] The connection structure between the headboard and footboard and the corresponding ends of the bed main body is arbitrary. For example, it may be a hooking structure formed by hooking pieces and hooking slits, or another hooking structure using a planar fastener. Furthermore, fixation using an adhesive or double-sided tape is also acceptable. The connection positions and the number of connections between the headboard and footboard and the corresponding ends of the bed main body are each arbitrary.

[0018] The materials for the top plate, headboard and footboard are arbitrary. For example, paper corrugated cardboard, various types of plastics and the like can be adopted. In particular, a plastic board that is lightweight, has high rigidity, and is excellent in planar compressive strength by sandwiching a vacuum-formed cylindrical molded sheet between sheets from above and below is preferred. The size of the top plate is appropriately changed according to the size of the portable bed. Further, the respective sizes of the headboard and the footboard are appropriately changed according to the bed size and the thickness of the bed main body. The side boards may be connected to only one end in the width direction of the top board, or may be connected to both ends thereof.

[0019] The configuration that allows the top board and the side boards to be foldable and unfoldable as the bed main body extends and retracts is optional. For example, a configuration in which the top board and the side boards are divided into a plurality of sections along the extension / retraction direction of the bed main body (the bed length direction), and each section is connected by hinges or slidably, can be adopted. The number of sections here is not limited as long as it is two or more. The configuration that allows the side boards to be placed at a hanging position where they are pivoted downward relative to the top board when the top board is unfolded is optional. For example, hinge-connecting the side boards to the ends in the width direction of the top board and the like may be mentioned.

[0020] Further, according to the present invention recited in claim 2, the bed main body is a plate frame base in which a plurality of laterally long rectangular support plates are latched in a foldable cross lattice shape, such that a plurality of rectangular cylindrical spaces with open upper and lower surfaces are continuously formed. The top board is formed by hinge-connecting a head-side plate portion having two head-side partial plate portions that are foldable in the bed length direction, a central plate portion, and a foot-side plate portion having two foot-side partial plate portions that are foldable in the bed length direction to one another. The top board comprises a head-side plate portion having two head-side partial plate portions that are foldable in the bed length direction, a central plate portion, and two pieces that are foldable in the bed length direction FootThe sideboards consist of a foot sideboard with a side panel and a head side panel, which are hinged together. The sideboards consist of a head sideboard with two head side panels that can be folded in the direction of the bed length, a central sideboard and a foot sideboard with two foot side panels that can be folded in the direction of the bed length, which are hinged together and folded together with the top plate. When the bed is folded, the top plate and the sideboards are book-shaped in a roughly U-shape in the direction of the bed length, with the central panel and central sideboards on the top surfaces, the head side panels and head side panels on the front surfaces, and the foot side panels and foot side panels on the rear surfaces. When assembling the bed, the folded head panels are positioned around the hinged connection points of the central panel and central side panels. The simple bed according to claim 1 is characterized in that the head side portion and the head side portion sideboard, and the overlapping foot side portion and the foot side portion sideboard are raised, and then the head board and the foot board are moved in the length direction of the bed so as to move away from each other, and in conjunction with this, the bed body is extended and the head side portion and the head side portion sideboard, and the foot side portion portion and the foot side portion sideboard are unfolded so that their surfaces are flush with each other, thereby revealing the top plate, the side boards, and the bed body with the top plate supported from below, and then the contraction of the bed body is restricted by rotating the side boards downward around the hinge connection portion with the top plate and positioning them near the side of the bed body.

[0021] The bed frame itself is a board frame that can be extended in the length direction of the bed. A cross-lattice structure refers to a shape in which multiple parallel support plates, each sloping upwards to the left, and multiple parallel support plates, each sloping upwards to the right, are connected in an intersecting manner. The material of the support plate is arbitrary. For example, corrugated cardboard or various types of plastic can be used. However, corrugated plastic is preferred in terms of strength and cost. The number of support plates used is arbitrary, as long as there are multiple. A rectangular cylindrical space is a cylindrical space whose opening top and bottom surfaces are square, rectangular, or rhombus-shaped, and which is continuous in the vertical and horizontal directions, like a cell.

[0022] The bed base, or top plate, comprises a central plate section, a head-side plate section with two head-side plate sections, and a foot-side plate section with two foot-side plate sections. Preferably, each head-side plate section is the same size and shape. Similarly, each foot-side plate section is also preferably the same size and shape. Furthermore, the tabletop may be a single large sheet with folds between each component, or it may be divided into multiple sections at predetermined points along its length. However, each section must be connected, for example, with connecting tape.

[0023] The invention described in claim 3 is, A simple bed comprising a bed body that is extendable in the length direction of the bed, a top plate positioned on the upper side of the bed body, a headboard and a footboard rotatably connected to both ends of the top plate in the length direction of the bed, and sideboards of the same length as the top plate rotatably connected to the ends of the top plate in the width direction, The ends of the bed body in the length direction are hooked onto the corresponding headboard and footboard, respectively. The top panel and the sideboard are configured to be foldable and unfoldable in conjunction with the extension and retraction of the bed frame. With the top panel extended, the top panel and the sideboard are flush with each other, and by simply positioning the sideboard in a hanging position near the side of the bed body, which is rotated downward relative to the top panel, the sideboard connected to the top panel prevents the flush shape of the top panel from being disrupted, The sideboard is characterized by having a sideboard support base that supports the sideboard from below so that the surface of the sideboard is flush with the surface of the top plate. It is a simple bed.

[0024] The material of the sideboard support base is arbitrary. For example, it can be the same material as the bed frame, top panel, headboard, and sideboards. The structure of the sideboard support base is arbitrary. For example, it could be a small board frame stand in which multiple rectangular support plates are fastened together in a foldable cross-grid pattern, creating a series of rectangular cylindrical spaces with open tops and bottoms. Alternatively, it could simply be a rectangular box. The number of sideboard support stands used is optional. One or two or more are acceptable.

[0025] The present invention as described in claim 4 is a simple bed as described in claim 3, characterized in that the sideboard support base is in the shape of a cross grid that can be extended and retracted in the length direction of the bed, and has a restricting member that restricts the contraction of the sideboard support base.

[0026] The material and shape of the regulatory member are arbitrary. Furthermore, the contraction control structure of the sideboard support base using regulating members is optional. For example, a rectangular cylindrical space with open top and bottom surfaces of a cross grid could be detachably closed off with a rectangular regulating plate. [Effects of the Invention]

[0027] According to the present invention, when assembling the bed, the headboard and footboard are moved away from each other, thereby extending the bed body, and consequently, the top plate and sideboards are unfolded so that their surfaces are flush with each other. Subsequently, the sideboards, which are rotatably connected to the widthwise ends of the top plate, are rotated downward to be positioned in a hanging position. As a result, in addition to the main locking mechanism that restricts the contraction of the bed frame from above by the unfolded top panel, the sideboards become an auxiliary locking mechanism that restricts the contraction of the bed frame from the sides. As a result, the reliability of the locking mechanism that restricts the contraction of the bed frame and the stability of the bed can be improved without employing any special locking means.

[0028] In particular, according to the present invention as described in claim 2, when assembling a simple bed that is folded into a book shape, first the top and bottom of the book-shaped simple bed are inverted, and the two folded head-side panels and head-side sideboards, and the two foot-side panels and foot-side sideboards are raised, respectively. Subsequently, the headboard is moved towards the head of the temporary bed, and the footboard is moved towards the foot of the temporary bed, with the central panel and central sideboard of the top panel as the center. As a result, the two head-side panels and head-side sideboards, and the two foot-side panels and foot-side sideboards, open up around their respective connection points.

[0029] Finally, the corresponding ends of each head-side panel and each head-side sideboard are brought together to unfold the head-side panel and head-side sideboard, while the corresponding ends of each foot-side panel and each foot-side sideboard are brought together to unfold the foot-side panel and foot-side sideboard. This results in a single large floorboard consisting of the head-side panel, the central panel, and the foot-side panel, along with sideboards flush with it.

[0030] At that time, since the corresponding ends of the bed frame are connected to the headboard and footboard, as the headboard and footboard move away from each other, each support plate inside the bed frame moves in the direction of assembly of the cross grid, and the bed frame, which was previously folded, is assembled into a cross grid-like plate frame base in which multiple rectangular cylindrical spaces with open tops and bottoms are formed in a continuous state.

[0031] Subsequently, the unfolded sideboard is rotated downward around the hinge connection point with the top panel and positioned in a hanging position near the side of the board frame (bed body), thereby restricting the contraction of the bed body. On the other hand, when folding (storing) the portable bed, the process is reversed from the assembly process described above, which folds the portable bed. This makes it easy to assemble and fold the bed, and when folded, it can be stored compactly like a book, making it easy to carry.

[0032] Furthermore, according to the present invention as described in claim 3, the sideboard support base supports each unfolded sideboard from below. As a result, the surface of the sideboard is firmly held flush with the surface of the tabletop (in a flat state without any steps), so that the sideboard can be used as an extension of the tabletop which is the floorboard. As a result, while maintaining its compact size when stored, the effective width of the temporary bed is expanded when in use, improving comfort during sleep by making it easier for the user to turn over.

[0033] Furthermore, according to the present invention as described in claim 4, since the sideboard support base is configured in a cross-lattice shape that can be extended and retracted in the length direction of the bed, the sideboard support base can be smoothly extended and retracted, for example, in the same way as the bed body. Furthermore, because it has a restricting member that limits the contraction of the sideboard support base, using the restricting member after deployment completes the sideboard support base becomes a rigid frame with a fixed length. As a result, despite its simple structure, it can firmly support the sideboard. [Brief explanation of the drawing]

[0034] [Figure 1] This is a perspective view of the assembled state of a simple bed according to Embodiment 1 of the present invention. [Figure 2] This is a plan view of the assembled state of a simple bed according to Embodiment 1 of the present invention. [Figure 3] This is a bottom view of the assembled state of the simple bed according to Embodiment 1 of the present invention. [Figure 4] This is a side view of the assembled state of a simple bed according to Embodiment 1 of the present invention. [Figure 5] This is an exploded view of the top plate, headboard, footboard, and sideboards that constitute a part of the simple bed according to Embodiment 1 of the present invention. [Figure 6] This is an enlarged front view of the first support plate, which constitutes a part of a simple bed according to Embodiment 1 of the present invention. [Figure 7]This is an enlarged front view of the second support plate, which constitutes part of a simple bed according to Embodiment 1 of the present invention. [Figure 8] This is an enlarged front view of the third support plate, which constitutes part of a simple bed according to Embodiment 1 of the present invention. [Figure 9] This is a perspective view showing the book-like folded state of the simple bed according to Embodiment 1 of the present invention. [Figure 10] This is a perspective view showing the folded and inverted state of a simple bed according to Embodiment 1 of the present invention. [Figure 11] This is a perspective view showing the head side panel and foot side panel of a simple bed according to Embodiment 1 of the present invention in an upright position. [Figure 12] This is a perspective view showing the unfolded state of the top plate, sideboard, and bed body of a simple bed according to Embodiment 1 of the present invention. [Figure 13] This is a perspective view of the assembled state of a simple bed according to Embodiment 2 of the present invention. [Figure 14] This is a bottom view of the assembled state of a simple bed according to Embodiment 2 of the present invention. [Figure 15] This is an enlarged perspective view of a sideboard support base that constitutes part of a simple bed according to Embodiment 2 of the present invention. [Figure 16] This is an enlarged front view of the first support base plate, which constitutes a part of the simple bed according to Embodiment 2 of the present invention. [Figure 17] This is an enlarged front view of the second support base plate, which constitutes part of a simple bed according to Embodiment 2 of the present invention. [Modes for carrying out the invention]

[0035] The following describes specific embodiments of the present invention. Here, a single-size simple bed will be used as an example. [Examples]

[0036] In Figures 1 to 4, 10 is a simple bed according to Embodiment 1 of the present invention, and this simple bed 10 is single size (length 190 cm, width 76.5 cm (96.5 cm when extended), height 38 cm) and comprises a bed body 12 that can be extended in the length direction of the bed, a top plate 11 positioned on the upper side of the bed body 12, a headboard 13 and a footboard 14 that are rotatably connected to both ends of the top plate 11 in the length direction of the bed via a fold a (scribe line), and a single sideboard 100 that is rotatably connected to one end of the top plate 11 in the width direction via a fold a.

[0037] The following will describe these components in detail. First, the bed frame 12 will be described. As shown in Figures 1, 3, 4, 6 to 8, the bed frame 12 is a plate frame base in which multiple rhombus-shaped cylindrical spaces 12a with open tops and bottoms are continuously formed in the vertical and horizontal directions by fastening together 16 horizontally elongated rectangular first to third support plates 24A to 24C of the same height (38 cm) but different lengths, in a foldable (extendable) cross grid pattern.

[0038] As shown in Figures 6 to 8, the first to third support plates 24A to 24C are each made of polypropylene corrugated plastic. In Figure 3, the first to third support plates 24A to 24C are each divided into two groups: an upward-facing group that slopes upward to the right in parallel, and a downward-facing group that is the opposite of the first and second groups and slopes downward to the right in parallel.

[0039] As shown in Figure 6, the four shortest first support plates 24A, each with a length of 55.6 cm, have three vertically elongated notches 27 formed parallel to each other at predetermined intervals on the upper long side of the plate, at both ends and in the middle along its length. Each notch slit 27 is cut from the edge of the upper long side down to the middle height of the support plate 24A.

[0040] In this figure, the leftmost notched slit 27 has a pair of left and right locking pieces c that can pivot via a short vertical fold b, positioned opposite each other on the cut ends (upper ends). These locking pieces c act as stoppers to prevent the second and third support plates 24B and 24C, which are respectively hooked onto the first support plate 24A via the corresponding notched slit 27, from coming loose. Furthermore, on the lower long side of each first support plate 24A, a rectangular small notch d is provided at a position on the extension of the notched slit 27 where each locking piece c is located. These small notches d are for preventing interference between the first to third support plates 24A to 24C that are locked together.

[0041] As shown in Figure 7, the four longest second support plates 24B, each measuring 107.7 cm in length, are approximately twice as long as the first support plate 24A. In the figure, four parallel notched slits 27 are formed on the upper long side of each second support plate 24B, extending from its right end to the left at the aforementioned pitch. The pair of latching lock pieces c are provided in the notched slits 27 located at the left and right ends. On the other hand, the small notches d are provided on the lower long side of each second support plate 24B at positions along the extension lines of the notched slits 27 with the latching lock pieces c.

[0042] Furthermore, in the figure, near the left end of each second support plate 24B (hereinafter referred to as the connecting end plate e), two parallel folds a are formed to allow the connecting end plate e to be folded and positioned on the front side of both ends of the corresponding headboard 13 or footboard 14 in the bed width direction. In the figure, three wedge-shaped fastening pieces f are provided at the upper and lower ends and in the middle of the height direction of each connecting end plate e to fasten them to the front side of both ends of the corresponding headboard 13 or footboard 14 in the bed width direction.

[0043] Furthermore, as shown in Figure 8, the eight third support plates 24C, each 95.1 cm long, are approximately 1.5 times longer than the first support plate 24A. In Figure 8, five vertically elongated notched slits 27 are formed parallel to each other on the upper long side of each third support plate 24C, including both ends, at the aforementioned pitch. Each notched slit 27 is cut from the edge of the upper long side down to the middle height of the support plate 24C. In the figure, a pair of locking pieces c are provided in the leftmost and rightmost of these notched slits 27. On the other hand, in the figure, the small notches d are provided in the lower long sides of each third support plate 24C at positions on the extension lines of the notched slits 27 with the locking pieces c.

[0044] When manufacturing (assembling) the bed frame 12, first, as shown in Figure 3, the corresponding notched slits 27 are inserted together, and the upward-facing group of eight parallel first to third support plates 24A to 24C, which are angled upwards to the right, and the downward-facing group of eight parallel first to third support plates 24A to 24C, which are angled downwards to the right and are reversed in orientation, are hooked together in a cross shape. At this time, each of the predetermined notched slits 27 is fitted with a pair of hooking lock pieces c. Therefore, the first to third support plates 24A to 24C are less likely to come apart. In this way, a cross-lattice-shaped bed frame 12 is manufactured. As a result, a bed frame 12 that can be extended in the length direction of the bed can be assembled easily and at low cost.

[0045] Next, the top panel 11, headboard 13, footboard 14, and sideboard 100 will be described with reference to Figures 1 to 3 and 5. These are made from a single large plastic board that is lightweight, highly rigid, and has excellent planar compressive strength, by sandwiching a vacuum-formed cylindrical sheet between sheets from above and below.

[0046] As shown in Figures 1, 2, and 5, the top plate 11 is a large rectangular board when viewed from above. This top plate 11 is positioned in the middle of the bed's length and has a long, narrow central plate section 15 that is the spine of the book, a rectangular head side plate section 16 that is positioned between the central plate section 15 and the headboard 13 and is the front cover of the book, and a rectangular foot side plate section 17 that is positioned between the central plate section 15 and the footboard 14 and is the back cover of the book. These plate sections 15 to 17 are each foldable along fold lines a.

[0047] Furthermore, as shown in Figures 1, 4, and 5, the sideboard 100 is a long board that is positioned on one side of the top plate 11 in the width direction of the bed and has the same length as the top plate 11 and half the height of the bed body 12. This sideboard 100 has a central sideboard 102 that is hinged to one side of the central board portion 15 via a fold a, a head sideboard 101 that is hinged to one side of the head side board portion 16 via a fold a, and a foot sideboard 103 that is hinged to one side of the foot side board portion 17 via a fold a.

[0048] Of these, the top panel (head side panel 16, central panel 15, foot side panel 17) 11 becomes the bed base of the simple bed 10. Furthermore, the head side plate portion 16 consists of a pair of front and rear head side portion plates 16A and 16B, which are divided into two equal parts via a fold a in the bed length direction, while the head side board 101 consists of a pair of front and rear head side portion boards 101A and 101B, which are divided into two equal parts via a fold a in the bed length direction. In addition, the foot side plate portion 17 consists of a pair of front and rear foot side portion plates 17A and 17B, which are divided into two equal parts via a fold a in the bed length direction, while the foot side board 103 consists of a pair of front and rear foot side portion boards 103A and 103B, which are divided into two equal parts via a fold a in the bed length direction.

[0049] At the butt-side ends of each head-side section plate 16A, 16B and the butt-side ends of each foot-side section plate 17A, 17B, horizontally elongated rectangular belt holes 104 are perforated on both sides in the width direction of each bed, so that they fit together when the corresponding section plates 16A-16B and 17A-17B are folded together. When transporting the bed, the simple bed 10, which is folded into a book shape, can be carried by hanging a suspension belt 105 over a pair of diagonally arranged belt holes 104 (see Figure 9).

[0050] As shown in Figure 5, the headboard 13 and footboard 14 are rectangular boards, each measuring 75 cm in length and 38 cm in height. At both ends of the headboard 13 and footboard 14 in the width direction of the bed, three wedge-shaped fastening holes g are provided at the top, bottom, and in the middle in the height direction for fastening the corresponding fastening piece f of the bed body 12.

[0051] When assembling the bed, the connecting end plates e of each second support plate 24B of the bed body 12 are folded towards the front side of both ends in the bed width direction of the corresponding headboard 13 or footboard 14 via two parallel folds a, and the fastening pieces f are fastened to the corresponding fastening holes g. By performing this simple fastening operation, a simple bed 10 is created in which the top plate 11 with sideboards 100 is connected to the bed body 12 via the headboard 13 and footboard 14. The load capacity of the assembled simple bed 10 is approximately 300 kg.

[0052] Next, the method of using the simple bed 10 according to Embodiment 1 of the present invention will be described with reference to Figures 1 to 12. Here, the simple bed 10 that has been folded into a book shape with the suspension belt 105 facing upwards will be used as the reference (see Figure 9). When assembling the bed, first remove the suspension belt 105 and invert the folded temporary bed 10 (see Figure 10). Then, rotate each of the two folded head section panels 16A, 16B and head section sideboards 101A, 101B, and the two foot section panels 17A, 17B and foot section sideboards 103A, 103B around the fold a between the central panel 15 and the central sideboard 102 to raise them up (see Figure 11).

[0053] Next, the headboard 13 is gradually moved towards the head of the simple bed 10, while the footboard 14 is gradually moved towards the foot of the simple bed 10. As a result, the two head-side panels 16A, 16B and the two head-side sideboards, and the two foot-side panels and the two foot-side sideboards gradually open up.

[0054] Finally, the ends of each head-side section 16A, 16B and the ends of each head-side section sideboard 101A, 101B are brought together, causing the head-side section 16 and head-side section sideboard 101 to unfold, while the ends of both foot-side section 17A, 17B and the ends of both foot-side section sideboards 103A, 103B are brought together, causing the foot-side section 17 and foot-side section sideboard to unfold (see Figure 2). As a result, a single large floorboard 11 consisting of the head-side section 16, the central section 15, and the foot-side section 17, and a sideboard 100 flush with it, are revealed.

[0055] At this time, the headboard 13 and footboard 14 are hooked onto two pairs of connecting end plates e on the left and right, which are located at each corner along the length of the bed body 12. As the headboard 13 and footboard 14 move away from each other, the first to third support plates 24A to 24C move in the assembly direction inside the bed body 12, and the folded bed body 12 is assembled into a cross-lattice-shaped board frame. Finally, the sideboard 100 is rotated downwards around the fold a with the top plate 11 and positioned near the side of the bed body 12 (hanging position).

[0056] As a result, in addition to the main locking mechanism that restricts the contraction of the bed frame 12 from above by the unfolded top plate 11, the sideboard 100 becomes an auxiliary locking mechanism that restricts the contraction of the bed frame 12 from the side. As a result, the reliability of the locking mechanism that restricts the contraction of the bed body 12 and the stability of the bed can be improved without employing any special locking means.

[0057] Furthermore, when folding the simple bed 10, the operation described above for assembling the bed is simply reversed. That is, first, the sideboard 100, which was in a hanging position, is rotated upward until it is flush with the top plate 11. Then, after slightly lifting the top plate 11 and a part of the sideboard 100, the headboard 13 and footboard 14 are moved closer to each other, causing the bed body 12 to contract and the simple bed 10 to fold up.

[0058] By making the portable bed 10 foldable into a book shape, it is easy to assemble and fold the portable bed 10, and when folded, the portable bed 10 can be stored compactly in a book shape, making it easy to carry.

[0059] Next, with reference to Figures 13 to 17, a simple bed according to Embodiment 2 of the present invention will be described. As shown in Figures 13 to 15, a feature of the simple bed 10A of Embodiment 2 is that it has a pair of front and rear sideboard support bases 200 that cooperate to support the sideboard 100 from below so that the surface of the sideboard 100 is flush with the surface of the top plate 11.

[0060] As shown in Figures 16 and 17, each sideboard support base 200 has a rectangular first support base plate 201 with a length of 134.5 cm that can be folded in an accordion-like manner, and a rectangular second support base plate 202 with a length of 132 cm that can be folded in an accordion-like manner, so that three rhombus-shaped cylindrical spaces 12a with open tops and bottoms can be connected in the length direction. Furthermore, on the upper long sides of the first and second support base plates 201 and 202, four vertically elongated notched slits 27 are formed parallel to each other at a predetermined pitch in the region from the left end to near the right end in the figure. Each notched slit 27 is cut from the edge of the upper long side down to the midpoint height of the first and second support base plates 201 and 202.

[0061] Furthermore, three elongated folds a are formed at the midpoint of each adjacent notched slit 27, respectively, for folding the first and second support base plates 201 and 202 in an accordion-like manner. Furthermore, on the upper long sides of the first and second support base plates 201 and 202, two vertically elongated auxiliary notches 27A are formed parallel to each other at the rightmost end and at the midpoint between the rightmost notch slit 27 and the rightmost fold a. Moreover, in the region between the left auxiliary notch slit 27A and the leftmost notch slit 27, two vertically elongated auxiliary folds h are formed parallel to each other, dividing this region into three equal parts.

[0062] Meanwhile, in the figure, the base ends of a pair of diamond-shaped restricting plates (restricting members) 203, which are inclined to the right to restrict the contraction of each sideboard support base by closing the upper opening of the corresponding cylindrical space 12b, are bendable via horizontally elongated folds i at the left side of the leftmost fold a and the left side of the third fold a from the left on the lower long side of the first support base plate 201. A horizontally elongated hooking projection 204 is provided on the leading edge of each diamond-shaped restricting plate 203. A horizontally elongated shallow notch groove j is formed at the right end of the lower long side of the first support base plate 201.

[0063] Furthermore, in the figure, on the upper long side of the second support plate 202, a pair of horizontally elongated, shallow locking grooves k are cut out near the right side of the leftmost fold a and near the right side of the third fold a from the left, respectively, into which the locking projections of the corresponding rhombic regulating plate are locked. Of these, the leftmost notched slit 27 is located at the midpoint in the length direction of each right-hand locking groove k. In addition, a portion of a horizontally elongated, shallow notched groove j is also formed at the right end of the upper long side of the second support plate 202.

[0064] As shown in Figures 15 to 17, when manufacturing (assembling) each sideboard support base 200, first, the first and second support base plates 201 and 202 are folded in an accordion shape via the first to third folds a from the left, and the right ends of the first and second support base plates 201 and 202 are folded into a small rectangular tube shape via two parallel auxiliary folds h, and the corresponding auxiliary notched slits 27A are hooked together. In this way, reinforcing rectangular tubes 205 are placed at the right ends of the first and second support base plates 201 and 202.

[0065] Subsequently, with the corresponding notched slits 27s inserted into each other, the first support plate 201 and the second support plate 202, which are inverted vertically, are hooked together in a cross shape, and the hooking projections 204 of the pair of rhombic restricting plates 203 are hooked into the corresponding hooking grooves i, thereby closing the upper openings of each rhombic cylindrical space 200a by each rhombic restricting plate 203. In this way, a pair of front and rear cross-lattice-shaped sideboard support bases 200 can be manufactured simply and at low cost.

[0066] The two resulting sideboard support bases 200 are positioned on the underside of the front and rear of the unfolded sideboard 100, supporting it from below. This firmly holds the surface of the sideboard 100 flush with the surface of the tabletop 11 (a flat state without any steps), allowing the sideboard 100 to be used as an extension of the tabletop 11, which is the floorboard. As a result, while maintaining the compact size when the bed is stored, the effective width of the 10A foldable bed is expanded when the bed is in use, improving comfort during sleep by making it easier for the user to turn over in their sleep.

[0067] Furthermore, since each sideboard support base 200 is configured in a cross-lattice shape that can be extended and retracted in the length direction of the bed, for example, similar to the bed body 12, the sideboard support base 200 can be compactly retracted when stored, and can be extended to the set length when the support base is in use. Furthermore, each sideboard support base 200 has two diamond-shaped restricting plates 203 that restrict its contraction. By using each diamond-shaped restricting plate 203 after deployment is complete, the sideboard support base 200 becomes a rigid frame with a fixed length. As a result, despite its simple structure, the sideboard 100 can be firmly supported. Other components, functions, and effects can be inferred from Example 1, and therefore will not be described. [Industrial applicability]

[0068] The present invention is useful, for example, as a simple bed that can be used in evacuation shelters during disasters. Although it is a simple bed, it may also be used as a seat, chair, bench, luggage rack, table, etc., for placing people or objects, and is not limited to these uses. Furthermore, a simple bed sized for children can be used as a chair, bench, etc., and as long as it satisfies the constituent elements of the present invention, it is included within the scope of the present invention. [Explanation of Symbols]

[0069] 10,10A Portable bed 11 Top plate 12 Bed frame 12a Cylindrical space 13 Headboard 14 Footboard 15 Center plate part 16 Head side plate section 16A, 16B Head-side plate section 17 Foot side panel 17A, 17B Foot side plate section 24A 1st support plate (support plate) 24B 2nd support plate (support plate) 24C 3rd support plate (support plate) 100 Sideboard 101 Headboard Sideboard 101A, 101B Headboard Sideboard 102 Central Sideboard 103 Foot sideboard 103A, 103B Foot side sideboard 200 Sideboard Support Stand 203 Diamond-shaped restricting plate (restricting member) a. Fold (hinge)

Claims

1. A simple bed comprising a bed body that is extendable in the length direction of the bed, a top plate positioned on the upper side of the bed body, a headboard and a footboard rotatably connected to both ends of the top plate in the length direction of the bed, and sideboards of the same length as the top plate rotatably connected to the ends of the top plate in the width direction, The ends of the bed body in the length direction are hooked onto the corresponding headboard and footboard, respectively. Moreover, the bed body consists of multiple horizontally elongated rectangular support plates, namely the first support plate, the second support plate, and the third support plate. The first support plate has three elongated notches formed at predetermined intervals on one of its long sides, at both ends and in the middle of its length. The second support plate is approximately twice the length of the first support plate, and on one long side of each second support plate, four parallel notched slits are formed at a predetermined pitch from the right end toward the left, and folds are formed at one end of each second support plate, connecting to the corresponding headboard or footboard at both ends in the bed width direction. The third support plate has a length approximately 1.5 times that of the first support plate, and five elongated notched slits are formed parallel to each other at a predetermined pitch on one of the longer sides of each third support plate, including both ends. With the corresponding notched slits inserted into each other, when viewed from a plane perpendicular to the vertical direction of the support plate, the upward-facing group of eight parallel first to third support plates that slope upward to the right and the downward-facing group of eight parallel first to third support plates that slope downward to the right, which are inverted in their orientation, are each hooked together in an intersecting manner. Furthermore, the positions of the ends of the support plates in the crossed state coincide with the respective ends of the top plate that is positioned on the upper surface side of the bed body. The top panel and the sideboard are configured to be foldable and unfoldable in conjunction with the extension and retraction of the bed frame. A simple bed characterized in that, when the top panel is unfolded, the top panel and the sideboards are flush with each other, and by simply positioning the sideboards in a hanging position near the side of the bed body, which is rotated downward relative to the top panel, the sideboards connected to the top panel prevent the flush shape of the top panel from being disrupted.

2. The bed frame is a plate frame base in which multiple rectangular support plates are fastened together in a foldable cross-lattice pattern, thereby forming a series of rectangular cylindrical spaces with open tops and bottoms. The top plate consists of a head-side plate section with two head-side plate sections that can be folded in the direction of the bed's length, a central plate section, and a foot-side plate section with two foot-side plate sections that can be folded in the direction of the bed's length, all of which are hinged together. The aforementioned top plate consists of a head-side plate section having two head-side plate sections that can be folded in the direction of the bed length, a central plate section, and a foot-side plate section having two foot-side plate sections that can be folded in the direction of the bed length, all of which are hinged together. The aforementioned sideboard consists of a head-side sideboard having two head-side sections that can be folded in the direction of the length of the bed, a central sideboard, and a foot-side sideboard having two foot-side sections that can be folded in the direction of the length of the bed, all of which are hinged together and folded integrally with the top panel. The top panel and sideboards, when the bed is folded, are book-shaped in a roughly U-shape along the length of the bed, with the central panel and central sideboard on the top surface, the head side panel and head sideboard on the front surface, and the foot side panel and foot sideboard on the rear surface. During bed assembly, the head-side section and head-side section, and the foot-side section and foot-side section are raised around the hinge connection points of the central section and the central sideboard, respectively. Then, the headboard and footboard are moved in the length direction of the bed so as to move away from each other, and as the bed body is extended, the head-side section and head-side section, and the foot-side section and foot-side section are unfolded so that their surfaces are flush with each other, thereby revealing the top plate, the sideboards, and the bed body with the top plate supported from below. Subsequently, the sideboards are rotated downward around the hinge connection points with the top plate and positioned near the sides of the bed body, thereby restricting the contraction of the bed body, as described in claim 1.

3. A simple bed comprising a bed body that is extendable in the length direction of the bed, a top plate disposed on the upper side of the bed body, a headboard and a footboard rotatably connected to both ends of the top plate in the length direction of the bed, and a sideboard of the same length as the top plate rotatably connected to the end of the top plate in the width direction, The ends of the bed body in the length direction are hooked onto the corresponding headboard and footboard, respectively. The top panel and the sideboard are configured to be foldable and unfoldable in conjunction with the extension and retraction of the bed frame. With the top panel extended, the top panel and the sideboard are flush with each other, and by simply positioning the sideboard in a hanging position near the side of the bed body, which is rotated downward relative to the top panel, the sideboard connected to the top panel prevents the flush shape of the top panel from being disrupted, A simple bed characterized by having a sideboard support stand that supports the sideboard from below such that the surface of the sideboard is flush with the surface of the top plate.

4. The aforementioned sideboard support base is The simple bed according to claim 3, characterized in that it has a cross-lattice structure that can be extended and retracted in the length direction of the bed, and has a restricting member that restricts the contraction of the sideboard support base.

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