JP6368296B2 - bed - Google Patents

Description

  The present invention relates to a bed in which a lower body side bed portion on which a user's lower body side is placed can be deformed into a bent state.

  Conventionally, various beds have been proposed in which a bed part including a lower body side bed part on which a user's lower body side is placed and an upper body side bed part on which the user's upper body side is placed is supported by a bed frame. Since this kind of bed can adjust the position and angle of the lower body side bed part and the upper body side bed part, it is suitable, for example, as a nursing bed or a medical bed.

  In the following Patent Document 1, the lower body side bed part is connected so that a first part on which the user's thigh side is placed and a second part on which the user's calf rests are bent. Therefore, the bed part on the lower body side of the bed has a reference state in which the bed surface is horizontal in a side view of the bed and a bent state in a mountain fold shape with the connecting part between the first part and the second part as a vertex. It can be deformed. For this reason, the user on the bed portion can lean his / her feet along the mountain fold shape of the lower body side bed portion in the bent state.

JP 2005-124651 A

  In Patent Document 1, the second portion on which the user's calf rests is always located above the bed surface in the reference state. For this reason, when the lower body side bed part is in a bent state, the user on the bed part has a tendency that the legs lifted to the lower body side bed part, especially the abdomen, etc. are pressed by the rise of the calf. .

  The present invention has been devised in view of the actual situation as described above, and provides a bed that can provide a comfortable feeling of use without pressure on the abdomen or the like even when the lower body side bed portion is in a bent state. This is the main purpose.

  The present invention is a bed in which a bed part including a lower body side bed part on which a user's lower body side is placed and an upper body side bed part on which the user's upper body side is placed is supported by a bed frame, the lower body side bed part Includes a first portion on which a user's thigh side is placed and a second portion on which the user's calf side is placed, and the first portion is rotatable about a horizontal axis extending in a bed width direction. A first end connected to the frame; and a second end on the second part side, wherein the second part is flexibly connected to the second end of the first part. And a distal end portion that is an end opposite to the proximal end portion, and the bed frame includes a frame fulcrum portion that supports only the proximal end portion side of the distal end portion of the second portion. And the lower body side bed in the side view of the bed Is deformable into a reference state in which the bed surface is horizontal and a bent state having a mountain fold shape with the base end portion of the second part as a vertex, and in the bent state, the second part is The first end portion is supported by the second end portion and the frame fulcrum portion, and the tip end portion is inclined below the bed surface in the reference state.

  In the bed according to the present invention, it is preferable that the frame fulcrum portion protrudes upward from the bed frame and supports the second portion from below.

  In the bed according to the present invention, the frame fulcrum part supports the second part in the horizontal state in the reference state and supports the second part in the inclined state in the bent state and the horizontal horizontal part. In addition, it is desirable to include an inclined surface portion substantially parallel to the second portion in the inclined state.

  In the bed according to the present invention, the bed frame includes a lower frame installed on a floor surface and an upper frame disposed on an upper side of the lower frame, and the frame fulcrum portion is the user of the upper frame. It is desirable to be provided at the end of the lower body side.

  In the bed according to the present invention, the length of the upper frame is preferably smaller than the length of the lower frame in the bed length direction.

In the bed according to the present invention, the bed frame includes a pair of side frames extending in the bed length direction on both sides in the bed width direction,
It is desirable that the pair of side frames are opened without connecting the end portions on the lower body side of the user.

  In the bed according to the present invention, it is preferable that an end portion of the upper body side of the pair of side frames is fixed by a headboard.

  In the bed according to the present invention, it is preferable that a footboard is fixed to the tip portion of the second portion.

  In the present invention, the lower body side bed part includes a first part on which the user's thigh side is placed, and a second part on which the user's calf side is placed, and the first part is around a horizontal axis extending in the bed width direction. A first end portion pivotably connected to the bed frame and a second end portion on the second portion side, the second portion being a base that is flexibly connected to the second end portion of the first portion. The bed frame includes a frame fulcrum portion that supports only the base end portion side of the end portion of the second portion, including an end portion and a tip end portion that is an end portion opposite to the base end portion. . The inclination angle of the second portion is determined at two points, that is, the second end portion of the first portion and the frame fulcrum portion of the bed frame in the side view of the bed. For this reason, it is easy to set the height of the tip of the second portion to an arbitrary position.

  In the present invention, when viewed from the side of the bed, the lower body side bed portion can be deformed into a reference state in which the bed surface is horizontal and a bent state in a mountain fold shape with the base end portion of the second portion as a vertex. For this reason, the user on the bed portion can lean his / her feet along the mountain fold shape of the lower body side bed portion in the bent state.

  In the present invention, in the bent state, the second portion is supported by the second end portion of the first portion and the frame fulcrum portion, and the tip portion is inclined below the bed surface in the reference state. For this reason, even when the leg is lifted by the lower body side bed part, the calf can be positioned below the conventional one. Therefore, the bed of the present invention reduces the pressure on the abdomen and the like in the bent state and provides a comfortable feeling of use.

It is a perspective view which shows one Embodiment of the bed of this invention. It is a disassembled perspective view of the bed of FIG. It is a perspective view of a lower frame. It is a perspective view of an upper frame. It is a top view of a raising / lowering mechanism. It is the sectional view on the AA line of FIG. It is a fragmentary sectional view of a lower body side bed part. It is a fragmentary sectional view of an upper body side bed part. It is sectional drawing of the bed in which a lower body side bed part is a reference | standard state. It is sectional drawing of the bed in which the lower body side bed part is bent.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a perspective view of the bed 1 of the present embodiment. As shown in FIG. 1, a bed 1 according to this embodiment includes a bed frame 2 installed on a floor surface F (not shown), a bed unit 3 supported by the bed frame 2 and on which a user is placed. Is included. The bed 1 of this embodiment can adjust the height and angle of the bed part 3, and is suitable as a nursing bed or a medical bed, for example.

  The bed 1 includes a headboard 26 on one side in the bed length direction. In this specification, the headboard 26 side of the bed 1 is the user's upper body side (hereinafter, simply referred to as “upper body side”) S1, and the opposite side is the user's lower body side (hereinafter, simply “lower body side”). S2).

  FIG. 2 shows an exploded perspective view of the bed 1. As shown in FIG. 2, the bed frame 2 of the bed 1 is, for example, a lower frame 10 installed on a floor surface F (not shown) and an upper side of the lower frame 10 and supports the bed part 3. And an upper frame 20 to be included. The lower frame 10 and the upper frame 20 are preferably connected by an elevating mechanism 30 that raises and lowers the upper frame 20 in a direction perpendicular to the lower frame 10.

  FIG. 3 shows a perspective view of the lower frame 10. As shown in FIG. 3, the lower frame 10 includes, for example, at least four leg portions 11 in the present embodiment, and a lower frame portion 12 that connects the leg portions 11. The lower frame portion 12 includes, for example, a pair of lower vertical frames 12A extending in the bed length direction and a plurality of lower vertical frames 12A extending in the bed width direction and connecting the pair of lower vertical frames 12A in this embodiment. And a horizontal frame 12B. The four legs 11 are preferably provided at both ends of the pair of lower vertical frames 12A in the bed longitudinal direction.

  The lower frame 10 of the present embodiment further includes a slide rail 13 and a link fulcrum part 14 to which an elevating mechanism 30 (shown in FIG. 2) is connected. A plurality of slide rails 13 and link fulcrum portions 14 are preferably provided. In the present embodiment, the lower frame 10 is provided with four slide rails 13 in total, two for each lower vertical frame 12A. Further, the same number of the link fulcrum portions 14 of the present embodiment as the slide rails 13 are provided adjacent to the slide rails 13.

  As a preferred embodiment, the lower frame 10 is further provided with a plurality of guard members 15 on the lower vertical frame 12A. The guard member 15 is formed, for example, by bending a thin pipe or the like, and can prevent a user's foot or the like from entering the inside of the lower frame 10.

  FIG. 4 is a perspective view of the upper frame 20. As shown in FIG. 4, the upper frame 20 has, for example, at least four support parts 21 to which an elevating mechanism 30 (shown in FIG. 2) is connected, four support parts 21 in this embodiment, and relative rotation of each support part 21. And an upper frame portion 22 that cannot be fixed.

  The support part 21 includes a lower end part 21 a connected to the lifting mechanism 30 (shown in FIG. 2) and an upper end part 21 b fixed to the upper frame part 22. An auxiliary leg 21A capable of landing on a floor surface F (not shown) is provided at the lower end 21a of the support portion 21 as will be described later.

  The upper frame portion 22 includes, for example, a pair of upper vertical frames 22A extending in the bed length direction, a first upper horizontal frame 22B having a circular cross section that extends in the bed width direction and connects the pair of upper vertical frames 22A. And a second upper horizontal frame 22C having a rectangular cross section. Each of the first upper horizontal frame 22B and the second upper horizontal frame 22C of the present embodiment is provided in two. It is preferable that two four support portions 21 be provided on each of the two first upper horizontal frames 22B.

  The upper frame 20 of the present embodiment further has a plurality of support frames 23 that support the bed 3 (shown in FIG. 2) from below and a plurality of frame fulcrum portions 24 above the upper frame portion 22. ing. It is desirable that the support frame 23 extends in the bed width direction, and its end 23a protrudes outward in the bed width direction from the upper vertical frame 22A.

  The frame fulcrum part 24 is preferably provided at the end 22Aa on the lower body side S2 of the upper vertical frame 22A so as to protrude upward from the upper vertical frame 22A. The frame fulcrum part 24 of the present embodiment supports the bed part 3 from below by a horizontal surface part 24a and an inclined surface part 24b described later. It is desirable that the horizontal surface portion 24a and the inclined surface portion 24b are connected by a smooth arc surface portion 24c.

  As shown in FIG. 2, the length of the upper frame 20 is preferably smaller than the length of the lower frame 10 in the bed length direction. By increasing the length of the lower frame 10, the stability of the bed 1 is improved. Further, by reducing the length of the upper frame 20, it is possible to avoid interference with the bed part 3 when the bed part 3 is moved.

  The bed frame 2 further preferably includes a pair of side frames 25 extending in the bed length direction on both sides of the upper frame 20 in the bed width direction. The side frame 25 is fixed to the end portion 23a of the support frame 23, for example. In the pair of side frames 25, for example, end portions 25 a on the upper body side S <b> 1 are fixed to the headboard 26. On the other hand, it is desirable that the pair of side frames 25 be opened without the end 25b of the lower body side S2 being connected.

  The bed frame 2 further preferably includes a pair of side boards 27 attached to the side frame 25 so as to be positionally adjustable in the bed length direction. The side board 27 includes a plurality of mounting rods 27a that are inserted into the plurality of mounting holes 25c of the side frame 25, for example. In this embodiment, each side frame 25 has six attachment holes 25c, and each side board 27 has two attachment rods 27a. Since such a side board 27 can select the attachment hole 25c into which the attachment rod 27a is inserted, the position adjustment in the bed length direction is easy.

  The lifting mechanism 30 of the present embodiment connects the upper frame 20 and the lower frame 10 so as to be relatively movable, and swings the lifting lever 31 swingable around a horizontal axis extending in the bed width direction. And a lift actuator 37 (shown in FIG. 5). The lifting mechanism 30 includes at least four lifting levers 31 in the present embodiment. The upper frame 20 and the lower frame 10 are connected by the lifting lever 31 at least at four places, in this embodiment, at four places.

  FIG. 5 shows a top view of the lifting mechanism 30. As shown in FIG. 5, the pair of elevating levers 31 arranged in the bed width direction are fixed so as not to be relatively rotatable by, for example, a lever connecting shaft 33. The lever connection shaft 33 of the present embodiment includes a first lever connection shaft 33A disposed on the upper body side S1 and a second lever connection shaft 33B disposed on the lower body side S2. A first elevating arm 34 is provided on each of the first lever connecting shaft 33A and the second lever connecting shaft 33B. Each first elevating arm 34 is connected to a connecting bar 35 extending in the bed length direction in a pair of turns.

  The first lever connecting shaft 33A of the present embodiment is further provided with a second lifting arm 36. For example, the second lifting arm 36 is connected to a lifting actuator 37 that swings the lifting lever 31 and rotates the first lever connecting shaft 33A. Therefore, the lift actuator 37 rotates the first lever connecting shaft 33A via the second lift arm 36, and the first lever connecting shaft 33A is connected to the second lever via the first lift arm 34 and the connecting bar 35. The connecting shaft 33B can be rotated. Thereby, the four elevating levers 31 fixed to the first lever connecting shaft 33A and the second lever connecting shaft 33B can swing with substantially the same movement.

  6 is a cross-sectional view taken along line AA in FIG. As shown in FIG. 6, the lifting lever 31 of the lifting mechanism 30 of the present embodiment includes a first connecting portion 31 a connected to the upper frame 20 side, and a second connecting portion 31 b connected to the lower frame 10 side. Is included. The elevating lever 31 preferably further includes a third connecting portion 31c to which an elevating link 32 described later is connected between the first connecting portion 31a and the second connecting portion 31b.

  The first connecting portion 31 a of the elevating lever 31 according to the present embodiment is connected to the support portion 21 of the upper frame 20 through a lever connecting shaft 33 in an even pair. Further, the second connecting portion 31b is connected to the slide rail 13 of the lower frame 10 by a counterslip pair that can slide in the horizontal direction. Such an elevating mechanism 30 can raise and lower the upper frame 20 according to the swinging of the elevating lever 31, so that the height of the upper frame 20 can be easily adjusted according to the use state of the bed 1. it can.

  It is desirable that the elevating mechanism 30 further includes an elevating link 32 that connects the lower frame 10 and the elevating lever 31 and can swing around a horizontal axis extending in the bed width direction. Such an elevating link 32 is preferably provided for each elevating lever 31.

  The elevating link 32 of this embodiment includes a first link end 32a connected to the elevating lever 31 and a second link end 32b connected to the lower frame 10 side. For example, the first link end 32a is connected to the third connecting portion 31c of the elevating lever 31 in a rotating pair. For example, the second link end 16b is connected to the link fulcrum portion 14 of the lower frame 10 in a pair of turns.

  A length L1 between the first link end 32a and the second link end 32b of the lift link 32 is equal to a length L2 between the first connection portion 31a and the third connection portion 31c of the lift lever 31. Such an elevating link 32 can elevate and lower the first connecting portion 31a of the elevating lever 31 in the vertical direction.

  The lift actuator 37 of the present embodiment has one end 37 a connected to the second lift arm 36 of the first lever connecting shaft 33 </ b> A and the other end 37 b connected to the upper frame 20. The lift actuator 37 is preferably an electric cylinder that can be changed to an arbitrary length, for example. In the present embodiment, one elevating actuator 37 raises and lowers the upper frame 20 in the vertical direction with respect to the lower frame 10.

  In addition, although description is abbreviate | omitted, the raising / lowering lever 31 and the raising / lowering link 32 of the raising / lowering mechanism 30 by the side of the 2nd lever connection shaft 33B also remove | exclude the 2nd raising / lowering arm 36 and the raising / lowering actuator 37, and the 1st lever connection shaft 33A side. It has the same structure as the lifting mechanism 30.

  As shown in FIG. 1, the bed part 3 of the present embodiment includes a lower body side bed part 40 on which the lower body side of the user is placed and an upper body side bed part 50 on which the upper body side of the user is placed. It is desirable that the bed part 3 further includes a central bed part 60 on which the user's waist is placed between the lower body side bed part 40 and the upper body side bed part 50.

  The lower body side bed part 40, the upper body side bed part 50, and the central bed part 70 are provided with cushion materials (not shown) such as urethane foam, for example. Such a cushioning material is preferably continuous from the lower body side bed part 40 to the upper body side bed part 50. In addition, it is desirable that at least the cushion material on the upper body side S1 is fixed to the upper body side bed part 50.

  FIG. 7 shows a partial cross-sectional view of the lower body side bed part 40. As shown in FIG. 7, the lower body side couch 40 of the present embodiment includes a first part 41 on the upper body side S1 on which the user's thigh side is placed, and a second part on the lower body side S2 on which the user's calf side is placed. 42. The first portion 41 is preferably shorter in the bed length direction than the second portion 42.

  The first portion 41 includes a first end portion 41a connected to the upper frame 20 so as to be rotatable around a horizontal axis extending in the bed width direction via the lower body side bracket 43, and a second end portion on the second portion 42 side. 41b.

  As shown in FIG. 2, in this embodiment, a pair of lower body side brackets 43 that are spaced apart in the bed width direction are fixed so as not to be relatively rotatable by a lower body side connecting shaft 44 that extends in the bed width direction. . The lower body side connecting shaft 44 is preferably provided with a lower body side arm 45 extending in a direction orthogonal to the lower body side bracket 43.

  As shown in FIG. 7, for example, a lower body side actuator 46 is connected to the lower body side arm 45 to rotate the lower body side connection shaft 44. The lower body side actuator 46 of this embodiment has one end 46 a connected to the lower body side arm 45 and the other end 46 b connected to the upper frame 20. The lower body side actuator 46 is preferably an electric cylinder that can be changed to an arbitrary length, for example. In the present embodiment, one lower body side actuator 46 tilts the first portion 41 with respect to the upper frame 20.

  The second portion 42 includes a base end portion 42a that is bendably connected to the second end portion 41b of the first portion 41, and a tip end portion 42b that is an end portion opposite to the base end portion 42a. . Only the base end portion 42 a side of the second portion 42 is supported from the lower side by the frame fulcrum portion 24 of the upper frame 20. The inclination angle of the second portion 42 is determined at two points of the second end portion 41 b of the first portion 41 and the frame fulcrum portion 24 in the side view of the bed. For this reason, it is easy to set the height of the tip end portion 42b of the second portion 42 to an arbitrary position.

  The second portion 42 tilts in the direction opposite to the first portion 41 as the first portion 41 tilts. For this reason, it is desirable that the inclined surface portion 24b of the frame fulcrum portion 24 is a surface substantially parallel to the most inclined second portion 42. That is, the frame fulcrum portion 24 supports the horizontal second portion 42 and supports the horizontal horizontal portion 24a, and the inclined second portion 42 and is substantially parallel to the inclined second portion 42. And an inclined surface portion 24b.

  A footboard 47 is fixed to the distal end portion 42b of the second portion 42 of the present embodiment. For this reason, the footboard 47 tilts as the second portion 42 tilts. For this reason, even if the 2nd part 42 is in the state which inclined, it can prevent bedding (illustration omitted), a user, etc. falling.

  As shown in FIG. 1, the upper body side bed part 50 of the present embodiment includes a third portion 51 on which the user's head side is placed, and a fourth portion 52 on which the user's back is placed. The third portion 51 is preferably shorter in the bed length direction than the fourth portion 52. The third portion 51 is connected to the fourth portion 52 so as to be tiltable by, for example, a pair of head links 53. The fourth portion 52 is connected to the bed frame 2 so as to be tiltable by, for example, an upper body side lever 54 (shown in FIG. 8).

  FIG. 8 shows a partial cross-sectional view of the upper body side bed part 50. As shown in FIG. 8, each head link 53 of the present embodiment includes a first head link 53A and a second head link 53B. The first head link 53A is arranged at a position away from the second head link 53B with respect to the third portion 51. The first head link 53A is preferably longer than the second head link 53B. Each head link 53 is a rotating pair that can rotate around a horizontal axis in which each connecting portion extends in the bed width direction. Such a head link 53 forms a trapezoidal link mechanism and can tilt the third portion 51 with respect to the fourth portion 52.

  The first head link 53A is preferably configured integrally with the head arm 55. The head arm 55 is connected to the upper body side link 57 via a rod 56, for example. One end 56a of the rod 56 is connected to the head arm 55 in a pair, and the other end 56b is connected to the upper body side link 57 in a pair. The operating range of the other end 56 b of the rod 56 is restricted by, for example, a long hole 52 a provided in the fourth portion 52. Such a rod 56 is preferably disposed along the fourth portion 52.

  The upper body side link 57 is configured, for example, by a first upper body side link 57 </ b> A and a second upper body side link 57 </ b> B connected to each other to form a substantially square shape. The first upper body side link 57A is connected to the rod 56 by a pair of turns and is connected to the elongated hole 52a of the fourth portion 52 by a pair of slips. The second upper body side link 57B is connected to the fourth portion 52 in pairs.

  The upper body side link 57 is pressed by the upper body side arm 58, for example. The upper body side arm 58 includes one end side arm 58a, the other end side arm 58b, and a central portion 58c located between the one end side arm 58a and the other end side arm 58b. The central portion 58c of the upper body side arm 58 is connected to the upper frame 20 by, for example, a slipping pair. In the upper body side arm 58, it is desirable that the one end side arm 58 a presses the upper body side link 57 and the other end side arm 58 b is connected to the upper body side actuator 59. Such an upper body side arm 58 can tilt the fourth portion 52 relative to the upper frame 20 in conjunction with the upper body side lever 54.

  The upper body side actuator 59 of this embodiment has one end 59 a connected to the other end side arm 58 b of the upper body side arm 58 and the other end 46 b connected to the upper frame 20. The upper body side actuator 59 is preferably an electric cylinder that can be changed to an arbitrary length, for example. In the present embodiment, one upper body side actuator 59 tilts the third portion 51 and the fourth portion 52 with respect to the upper frame 20.

  As shown in FIG. 1, the central couch portion 60 is preferably fixed so as not to move relative to the bed frame 2.

  Next, the operation of the second part 42 when the lower body side bed part 40 of the bed 1 of this embodiment is tilted will be described. FIG. 9 shows a cross-sectional view of the bed 1 in which the lower body side bed part 40 is in the reference state PS. As shown in FIG. 9, in the present embodiment, the bed surface of the lower body side bed section 40 is parallel to the floor surface F in the side view of the bed, that is, in a horizontal state (hereinafter simply referred to as “reference state”). In the PS, the lower body side actuator 46 is in the shortest state.

  In the bed side view, in the reference state PS, the bed surface of the first portion 41 is in a horizontal state parallel to the floor surface F. At this time, the second end 41b of the first portion 41 has substantially the same height as the first end 41a.

  In the reference state PS, in the second portion 42 of the lower body side bed portion 40, the base end portion 42 a of the second portion 42 is supported by the second end portion 41 b of the first portion 41. In addition, the second portion 42 is supported by the horizontal surface portion 24 a of the frame fulcrum portion 24 of the upper frame 20 only on the base end portion 42 a side than the distal end portion 42 b of the second portion 42. Such a second portion 42 also has a bed surface in a horizontal state parallel to the floor surface F, and the distal end portion 42b of the second portion 42 has the same height as the proximal end portion 42a.

  FIG. 10 shows a cross-sectional view of the bed 1 in which the lower body side bed part 40 is in the bent state PF. As shown in FIG. 10, in the present embodiment, the lower body side in the bent state (hereinafter, simply referred to as “bent state”) PF in which the bed surface of the lower body side bed portion 40 is most inclined in the side view of the bed. The actuator 46 is in the longest state. In the bent state PF, the lower body side couch portion 40 is mountain-folded with the second end portion 41b of the first portion 41 and the base end portion 42a of the second portion 42 as apexes. For this reason, the user on the bed part 3 can lean his / her feet along the mountain fold shape of the lower body side bed part 40 in the bent state PF.

  In the bed side view, in the bent state PF, the first portion 41 is in an inclined state in which the bed surface is inclined with respect to the floor surface F. At this time, the second end 41b of the first portion 41 is positioned above the first end 41a.

  In the bent state PF, in the second portion 42 of the lower body side couch portion 40, the base end portion 42a of the second portion 42 is supported by the second end portion 41b of the first portion 41 as in the reference state PS. The second portion 42 is supported by the inclined surface portion 24 b of the frame fulcrum portion 24 of the upper frame 20 only on the base end portion 42 a side with respect to the distal end portion 42 b of the second portion 42.

  Such a second portion 42 has a bed surface inclined in the opposite direction to the first portion 41 with respect to the floor surface F, and the distal end portion 42b of the second portion 42 is located below the proximal end portion 42a. To position. At this time, the second portion 42 is inclined such that the tip end portion 42b is positioned below the bed surface in the reference state PS. For this reason, even when a user's foot | leg is lifted by the lower body side bed part 40, a calf can be located below rather than the past. Therefore, the bed 1 of the present embodiment reduces the pressure on the abdomen and the like in the bent state PF and provides a comfortable feeling of use.

  As shown in FIGS. 9 and 10, the lower body side couch portion 40 of the present embodiment can be deformed into a reference state PS and a bent state PF in the bed side view. At this time, the footboard 47 tilts with the tilting of the second portion 42 of the lower body side bed part 40, so that the bedding (not shown) on the lower body side bed part 40 or the user can be prevented from falling. . In addition, since the pair of side frames 25 of the bed frame 2 has the end 25b on the lower body side S2 open, the bedding or the user or the like can also be used when the bedding or the user is deformed from the bent state PF to the reference state PS. There is no possibility of being pinched between the portion 42 and the bed frame 2.

  The lower body side couch 40 may be in an intermediate state PC between the reference state PS and the bent state PF. In the intermediate state PC, as in the reference state PS and the bent state PF, the second part 42 of the lower body side bed part 40 is such that the base end part 42a of the second part 42 is the second end part 41b of the first part 41. Supported. Further, the second portion 42 is supported by the arc surface portion 24 c of the frame fulcrum portion 24 of the upper frame 20 only on the base end portion 42 a side than the distal end portion 42 b of the second portion 42.

  As mentioned above, although especially preferable embodiment of this invention was explained in full detail, this invention is not limited to the said embodiment, It can deform | transform and implement in a various aspect.

  In the above-described embodiment, the second portion 42 is supported from the lower side by the frame fulcrum portion 24. For example, the second portion 42 has a support portion that is closer to the proximal end portion 42a than the distal end portion 42b. It may be supported from the side. Such a support part is preferably supported by a counterslip.

  Moreover, in the above-mentioned embodiment, although the horizontal surface part 24a and the inclined surface part 24b of the frame fulcrum part 24 were connected by the circular arc surface part 24c, you may connect by the some inclined surface part from which an angle differs, for example. Such an aspect is particularly effective when the inclination angle of the lower body side couch 40 is adjusted stepwise.

  In the above-described embodiment, the bed frame 2 is lifted and lowered by the lifting mechanism 30. However, for example, the lower body side bed part 40 may be applied to the bed 1 that does not have the lifting mechanism 30.

2 Bed frame 24 Frame fulcrum part 40 Lower body side bed part 41 First part 41b Second end part 42 Second part 42a Base end part 42b Tip part 50 Upper body side bed part

Claims (7)

A bed including a bed part including a lower body side bed part on which a user's lower body side is placed and an upper body side bed part on which an upper body side of the user is placed is supported by a bed frame,
The lower body side bed part includes a first part on which a user's thigh side is placed, and a second part on which the user's calf side is placed,
The first portion includes a first end connected to the bed frame so as to be rotatable about a horizontal axis extending in a bed width direction, and a second end on the second portion side,
The second portion includes a base end portion that is bendably connected to the second end portion of the first portion, and a tip end portion that is an end portion opposite to the base end portion,
The bed frame has a frame fulcrum part that supports only the base end side of the tip part of the second part,
In the bed side view, the lower body side bed part is deformable into a reference state in which the bed surface is horizontal and a bent state in a mountain fold shape with the base end of the second part as a vertex,
In the bent state, the second portion is supported by the second end portion of the first portion and the frame fulcrum portion, and the tip portion is positioned below the bed surface in the reference state. Tilt ,
The frame fulcrum portion supports the second portion in a horizontal state and supports a horizontal horizontal surface portion in the reference state, and supports the second portion in an inclined state and supports the second portion in an inclined state in the bent state. A bed comprising a portion and an inclined surface portion substantially parallel .   The bed according to claim 1, wherein the frame fulcrum portion protrudes upward from the bed frame and supports the second portion from below. The bed frame includes a lower frame installed on a floor surface, and an upper frame disposed on the upper side of the lower frame,
The bed according to claim 1 or 2 , wherein the frame fulcrum portion is provided at an end of the upper frame on the lower body side of the user. The bed according to claim 3 , wherein a length of the upper frame is smaller than a length of the lower frame in the bed length direction. The bed frame includes a pair of side frames extending in the bed length direction on both sides in the bed width direction,
The bed according to any one of claims 1 to 4 , wherein the pair of side frames are opened without being connected to an end portion on a lower body side of the user. The bed according to claim 5 , wherein the pair of side frames has an end on the upper body side of the user fixed by a headboard. The bed according to any one of claims 1 to 6 , wherein a footboard is fixed to the tip portion of the second portion.

Images