JP6688048B2 - bed - Google Patents

Description

  The present invention relates to a bed capable of moving an upper frame up and down in a direction perpendicular to a lower frame.

  Conventionally, a lower frame that is installed on the floor, an upper frame that is arranged above the lower frame and that supports a bed on which a user is placed, and an elevating unit that vertically elevates and lowers the upper frame with respect to the lower frame. Various beds including a mechanism have been proposed. This type of bed is suitable as, for example, a care bed or a medical care bed because the height of the upper frame that supports the bed can be adjusted arbitrarily.

  Patent Document 1 below describes a bed including an elevating mechanism as an elevating mechanism, which includes an elevating lever that connects an upper frame and a lower frame so that they can move relative to each other and that can swing about a horizontal axis. In the elevating lever of the bed of Patent Document 1, the first connecting portion connected to the upper frame side is a rotating pair, and the second connecting portion connected to the lower frame side is a horizontally sliding pair capable of sliding in the horizontal direction. .

JP 2001-293038 A

  In the bed of Patent Document 1, the first connecting portion is located above the second connecting portion in both the low floor position and the high floor position of the upper frame. The vertical movement distance of the first connecting portion cannot exceed the length of the elevating lever. Therefore, the lifting stroke of the upper frame is smaller than the length of the lifting lever, which is a factor of reducing the lifting stroke.

  The present invention has been devised in view of the above circumstances, and a main object of the present invention is to provide a bed capable of increasing a lifting stroke for lifting and lowering an upper frame in a vertical direction with respect to a lower frame.

  The present invention is a bed including a lower frame installed on a floor surface, an upper frame disposed above the lower frame, and an elevating mechanism for vertically elevating the upper frame with respect to the lower frame. The elevating mechanism includes an elevating lever that connects the upper frame and the lower frame so that they can move relative to each other and that can swing about a horizontal axis. The elevating lever is connected to the upper frame side. 1 connecting part and a 2nd connecting part connected to the lower frame side, and in the low floor position of the upper frame, the 1st connecting part is located below the 2nd connecting part, and The first connecting portion is located above the second connecting portion at a raised floor position of the upper frame.

  In the bed according to the present invention, one of the first connecting portion and the second connecting portion is a rotating pair, and the other of the first connecting portion and the second connecting portion is a horizontal slide capable of sliding in the horizontal direction. It is desirable to have a kinematic pair.

  In the bed according to the present invention, the other of the first connecting portion and the second connecting portion moves in one horizontal direction as the upper frame rises from the low floor position to the intermediate position, It is preferable that the upper frame moves in the other horizontal direction as the upper frame rises from the intermediate position to the raised floor position.

  In the bed according to the present invention, the elevating mechanism further includes an elevating actuator that swings the elevating lever, and the elevating actuator is connected to one of the first connecting portion and the second connecting portion in a rotating pair. It is preferably attached to the upper frame or the lower frame.

  In the bed according to the present invention, the elevating mechanism further includes an elevating link that connects the upper frame or the lower frame to the elevating lever and can swing about a horizontal axis. The upper frame or the lower frame connected to one of the two connecting parts in a rotating pair includes a link fulcrum part to which the elevating link is connected, and the elevating lever includes the first connecting part and the second connecting part. Preferably, a third connecting part to which the elevating link is connected is further included between

  In the bed according to the present invention, it is preferable that a length of the elevating link is equal to a length between one of the first connecting portion and the second connecting portion of the elevating lever and the third connecting portion.

  In the bed according to the present invention, it is preferable that the elevating mechanism includes at least four elevating levers, and the upper frame and the lower frame are connected by at least four places by the elevating levers.

  In the bed according to the present invention, it is preferable that the upper frame has auxiliary legs that land on the floor surface at the low floor position.

  In the bed according to the present invention, it is preferable that the auxiliary leg is provided on a support portion of the upper frame connected to the first connecting portion of the elevating lever.

  In the bed according to the present invention, it is preferable that a guard member is provided on the lower frame, adjacent to the auxiliary leg of the upper frame.

  In the present invention, the elevating mechanism includes an elevating lever that connects the upper frame and the lower frame to each other so that they can move relative to each other and that can swing about a horizontal axis, and the elevating lever is the first connecting portion connected to the upper frame side. And a second connecting portion connected to the lower frame side. Since such an elevating mechanism can elevate and lower the upper frame according to the swing of the elevating lever, the height of the upper frame can be easily adjusted according to the usage state of the bed.

  In the present invention, in the low floor position of the upper frame, the first connecting portion is located below the second connecting portion, and in the high floor position of the upper frame, the first connecting portion is located below the second connecting portion. It is located on the upper side. In such an elevating lever, the vertical moving distance of the first connecting portion can be made larger than the length of the elevating lever. Therefore, the lifting stroke of the upper frame can be made larger than the length of the lifting lever, and the lifting stroke can be increased.

It is a perspective view showing one embodiment of a bed of the present 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 lifting mechanism. It is the sectional view on the AA line of FIG. It is a fragmentary sectional view of the lower body side bed part. It is a fragmentary sectional view of the upper body side bed part. It is sectional drawing of the bed in a low floor position of an upper frame. It is sectional drawing of the bed in the raised position of the upper frame. It is sectional drawing of the bed in the intermediate position of an upper frame.

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 of the present embodiment includes a bed frame 2 installed on a floor surface F (not shown), and a bed part 3 supported by the bed frame 2 and on which a user is placed. Is included. The bed 1 of the present embodiment can adjust the height and angle of the bed 3, and is suitable as, for example, a care bed or a medical care bed.

  The bed 1 includes a headboard 26 on one side in the bed length direction. In the present specification, the headboard 26 side of the bed 1 is referred to as a user's upper body side (hereinafter, may be simply referred to as “upper body side”) S1, and the opposite side is the user's lower body side (hereinafter, simply “lower body side”). That is the case) 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 the floor surface F (not shown), and is arranged above the lower frame 10 and supports the bed 3. And an upper frame 20 that operates. It is preferable that the lower frame 10 and the upper frame 20 are connected by an elevating mechanism 30 that elevates the upper frame 20 in the vertical direction with respect 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 connecting the leg portions 11 to each other. The lower frame part 12 is, for example, a plurality 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 in the present embodiment, two lower vertical frames 12A. It includes a horizontal frame 12B. It is desirable that the four legs 11 are 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 portion 14 to which the lifting mechanism 30 (shown in FIG. 2) is connected. It is desirable that a plurality of slide rails 13 and a plurality of link fulcrums 14 be provided. In this embodiment, the lower frame 10 is provided with two slide rails 13 in each of the lower vertical frames 12A, that is, four slide rails 13 in total. Further, the link fulcrums 14 of the present embodiment are provided adjacent to the slide rails 13 in the same number as the slide rails 13.

  As a preferred mode, 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 by bending a thin pipe or the like, for example, and can prevent a user's foot or the like from entering the inside of the lower frame 10.

  FIG. 4 shows a perspective view of the upper frame 20. As shown in FIG. 4, the upper frame 20 includes, for example, at least four support parts 21 to which the lifting mechanism 30 (shown in FIG. 2) is connected, and in the present embodiment, four support parts 21 and each support part 21 are relatively rotated. An upper frame portion 22 is fixed so that it cannot be fixed.

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

  The upper frame portion 22 includes, for example, a pair of upper vertical frames 22A extending in the bed length direction and 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. The second upper horizontal frame 22C having a rectangular cross section is included. Each of the first upper horizontal frame 22B and the second upper horizontal frame 22C of the present embodiment is provided by two. It is desirable that the four support portions 21 are provided in twos on each of the two first upper horizontal frames 22B.

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

  It is desirable that the frame fulcrum portion 24 is provided at the end portion 22Aa on the lower body side S2 of the upper vertical frame 22A so as to project upward from the upper vertical frame 22A. The frame fulcrum part 24 of this embodiment supports the bed part 3 from below by a horizontal surface part 24a and an inclined surface part 24b which will be described later. It is desirable that the horizontal surface portion 24a and the inclined surface portion 24b be 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. Increasing the length of the lower frame 10 improves the stability of the bed 1. 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 moves.

  The bed frame 2 preferably further 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, for example, the end portion 23a of the support frame 23. The pair of side frames 25 has, for example, an end 25a on the upper body side S1 fixed to the headboard 26. On the other hand, it is desirable that the pair of side frames 25 be open without connecting the ends 25b of the lower body side S2.

  The bed frame 2 preferably further includes a pair of sideboards 27 mounted on the side frames 25 so as to be positionally adjustable in the bed length direction. The side board 27 includes, for example, a plurality of mounting bars 27a that are inserted into the plurality of mounting holes 25c of the side frame 25. In this embodiment, each side frame 25 has six mounting holes 25c, and each side board 27 has two mounting bars 27a. In such a sideboard 27, since the mounting hole 25c into which the mounting rod 27a is inserted can be selected, it is easy to adjust the position in the bed length direction.

  The elevating mechanism 30 of the present embodiment oscillates the elevating lever 31, which connects the upper frame 20 and the lower frame 10 so that they can move relative to each other, and can oscillate about 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 this embodiment. The upper frame 20 and the lower frame 10 are connected by an elevating lever 31 at least at four places, in this embodiment four places.

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

  The first lever connecting shaft 33A of the present embodiment is further provided with a second elevating arm 36. The second elevating arm 36 is connected to an elevating actuator 37 that swings the elevating lever 31, for example, and rotates the first lever connecting shaft 33A. Therefore, the elevating actuator 37 rotates the first lever connecting shaft 33A via the second elevating arm 36, and the first lever connecting shaft 33A moves the second lever via the first elevating arm 34 and the connecting bar 35. The connecting shaft 33B can be rotated. Accordingly, 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.

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

  The first connecting portion 31a of the elevating lever 31 of the present embodiment is connected to the supporting portion 21 of the upper frame 20 via a lever connecting shaft 33 in a rotating pair. Further, the second connecting portion 31b is connected to the slide rail 13 of the lower frame 10 by a horizontally sliding pair that is slidable in the horizontal direction. Since the elevating mechanism 30 can elevate and lower the upper frame 20 according to the swing of the elevating lever 31, the height of the upper frame 20 can be easily adjusted according to the usage state of the bed 1. it can.

  The elevating mechanism 30 preferably further includes an elevating link 32 connecting the lower frame 10 and the elevating lever 31 and swingable about a horizontal axis extending in the bed width direction. It is desirable that such a lifting link 32 is provided for each lifting lever 31.

The elevating link 32 of the present 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. 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 32 b is, for example, connected to the link fulcrum portion 14 of the lower frame 10 in a rotating pair.

  The length L1 between the first link end 32a and the second link end 32b of the elevating link 32 is equal to the length L2 between the first connecting portion 31a and the third connecting portion 31c of the elevating lever 31. The elevating link 32 can vertically elevate the first connecting portion 31a of the elevating lever 31.

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

  Although not described, the lifting lever 31 and the lifting link 32 of the lifting mechanism 30 on the side of the second lever connecting shaft 33B are also on the side of the first lever connecting shaft 33A except for the second lifting arm 36 and the lifting actuator 37. It has the same structure as the lifting mechanism 30.

  As shown in FIG. 1, the bed section 3 of the present embodiment includes a lower body side bed section 40 on which the lower body side of the user is placed and an upper body side bed section 50 on which the upper body side of the user is placed. The bed 3 preferably further includes a central bed 60 on which the user's hips are placed between the lower body side bed 40 and the upper body side bed 50.

  The lower body side bed section 40, the upper body side bed section 50, and the central bed section 70 are provided with cushion materials (not shown) such as urethane foam. It is desirable that such a cushion material be continuous from the lower body side bed section 40 to the upper body side bed section 50. Further, at least the cushion material on the upper body side S1 is preferably fixed to the upper body side bed portion 50.

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

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

  As shown in FIG. 2, in the present embodiment, a pair of lower body side brackets 43 that are arranged apart from each other in the bed width direction are fixed by a lower body side connecting shaft 44 that extends in the bed width direction such that they cannot rotate relative to each other. . The lower body side connecting shaft 44 is preferably further 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 connecting shaft 44. The lower body side actuator 46 of the present embodiment has one end 46a connected to the lower body side arm 45 and the other end 46b connected to the upper frame 20. The lower body side actuator 46 is preferably, for example, an electric cylinder that can be changed to an arbitrary length. 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. . The second portion 42 is supported from below by the frame fulcrum portion 24 of the upper frame 20 only on the proximal end portion 42a side of the distal end portion 42b. In the side view of the bed, the inclination angle of the second portion 42 is fixed at two points, that is, the second end portion 41b of the first portion 41 and the frame fulcrum portion 24. Therefore, it is easy to set the height of the tip portion 42b of the second portion 42 to an arbitrary position.

  The second portion 42 tilts in the direction opposite to that of the first portion 41 as the first portion 41 tilts. Therefore, it is desirable that the inclined surface portion 24b of the frame fulcrum portion 24 is a surface that is substantially parallel to the most inclined second portion 42. That is, the frame fulcrum portion 24 supports the second portion 42 in the horizontal state and is horizontal, and the horizontal plane portion 24 a that is horizontal and supports the second portion 42 in the inclined state and is substantially parallel to the second portion 42 in the inclined state. The inclined surface portion 24b is included.

  A foot board 47 is fixed to the tip portion 42b of the second portion 42. Therefore, the footboard 47 tilts as the second portion 42 tilts. Therefore, even if the second portion 42 is inclined, the bedding (not shown), the user, and the like can be prevented from falling.

  As shown in FIG. 1, the upper half of the bed 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 than the fourth portion 52 in the bed length direction. The third portion 51 is tiltably connected to the fourth portion 52 by, for example, a pair of head links 53. The fourth portion 52 is tiltably connected to the bed frame 2 by an upper body side lever 54 (shown in FIG. 8), for example.

  FIG. 8 shows a partial cross-sectional view of the upper body side bed 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 located farther from the third portion 51 than the second head link 53B. The first head link 53A is preferably longer than the second head link 53B. Each head link 53 is a pair of turns in which each connecting portion is rotatable about a horizontal axis extending in the bed width direction. Such a head link 53 constitutes 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 by a pair, and the other end 56b is connected to the upper body side link 57 by a pair of turns. The operation range of the other end 56b of the rod 56 is restricted by, for example, an elongated hole 52a provided in the fourth portion 52. Such a rod 56 is preferably arranged along the fourth portion 52.

  The upper half body side link 57 is, for example, a first dogleg side body link 57A and a second upper half body side link 57B connected to each other, and is configured in a substantially V shape. The first upper body side link 57A is connected to the rod 56 in a rotating pair, and is also connected to the elongated hole 52a of the fourth portion 52 in a rotating slip pair. The second upper body side link 57B is connected to the fourth portion 52 in a rotating pair.

  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, for example, connected to the upper frame 20 by a sliding pair. In the upper body side arm 58, it is preferable that one end side arm 58a presses the upper body side link 57 and the other end side arm 58b is connected to the upper body side actuator 59. The upper body side arm 58 can interlock the upper body side lever 54 to tilt the fourth portion 52 with respect to the upper frame 20.

Upper body side actuator 59 of the present embodiment, one end 59a is connected to the other end arm 58b of the upper body-side arm 58, the other end 59 b is connected to the upper frame 20. The upper body side actuator 59 is preferably, for example, an electric cylinder that can be changed to an arbitrary length. 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 bed 60 is preferably fixed so as not to move relative to the bed frame 2.

  Next, the operation of the elevating lever 31 when vertically moving the upper frame 20 of the bed 1 of the present embodiment with respect to the lower frame 10 will be described. FIG. 9 shows a sectional view of the bed 1 at the low floor position PL of the upper frame 20. As shown in FIG. 9, in the present embodiment, the lower frame position where the upper frame 20 is the lowest position with respect to the lower frame 10 installed on the floor surface F (hereinafter, simply referred to as “low floor position”). In PL) PL, the elevating actuator 37 is in the shortest state.

  At the low floor position PL of the upper frame 20, the first connecting portion 31 a of the elevating lever 31 is located below the second connecting portion 31 b of the elevating lever 31. Such an upper frame 20 can be lowered to a position close to the floor surface F. At this time, since the auxiliary leg 21A of the upper frame 20 is provided on the support portion 21 of the upper frame 20 that is connected to the first connecting portion 31a of the elevating lever 31, at the low floor position PL, the leg portion 11 and the floor are joined together. Can land on face F. Therefore, when the bed 1 is used at the low floor position PL, its stability can be improved.

  Here, the guard member 15 of the lower frame 10 is preferably provided adjacent to the auxiliary leg 21A of the upper frame 20. When the upper frame 20 descends to the low floor position PL and the auxiliary leg 21A is landed on the floor surface F, the guard member 15 is provided between the auxiliary leg 21A and the floor surface F so as to prevent the user's foot. Etc. can be prevented from being caught.

  FIG. 10 shows a sectional view of the bed 1 at the raised floor position PH of the upper frame 20. As shown in FIG. 10, in this embodiment, the upper frame 20 is at the highest position with respect to the lower frame 10 installed on the floor F (hereinafter, may be simply referred to as “high floor position”). At PH, the lift actuator 37 is in the longest state.

  At the raised floor position PH of the upper frame 20, the first connecting portion 31 a of the elevating lever 31 is located above the second connecting portion 31 b of the elevating lever 31. In such a lift lever 31, the vertical movement distance of the first connecting portion 31 a can be made larger than the length of the lift lever 31. Therefore, the lifting stroke of the upper frame 20 can be made larger than the length of the lifting lever 31, and the lifting stroke can be increased.

  FIG. 11 shows a sectional view of the bed 1 at the intermediate position PM of the upper frame 20. As shown in FIG. 11, in the present embodiment, at an intermediate position (hereinafter, may be simply referred to as “intermediate position”) PM which is a position between the low floor position PL and the high floor position PH of the upper frame 20, The length of the lifting actuator 37 of the lifting mechanism 30 is also an intermediate length.

  As shown in FIGS. 9 to 11, in the low floor position PL, the second connecting portion 31b of the elevating lever 31 is located on the one end 13a side of the slide rail 13 of the lower frame 10. The second connecting portion 31b of the elevating lever 31 moves in one horizontal direction along the slide rail 13 from the one end 13a side of the slide rail 13 as the upper frame 20 moves up from the low floor position PL to the intermediate position PM. Move to.

  At the intermediate position PM, the second connecting portion 31b of the elevating lever 31 is located on the other end 13b side of the slide rail 13 of the lower frame 10. The second connecting portion 31b of the elevating lever 31 moves in the other horizontal direction along the slide rail 13 from the other end 13b side of the slide rail 13 as the upper frame 20 rises from the intermediate position PM to the raised floor position PH. Move to.

  Although a particularly preferred embodiment of the present invention has been described above in detail, the present invention is not limited to the above-described embodiment, and can be modified and implemented in various modes.

  In the above-mentioned embodiment, the mode in which the first connecting portion 31a is the rotating pair and the second connecting portion 31b is the rotating pair is shown. For example, the elevating lever 31 includes the first connecting portion 31a and the second connecting portion. It suffices that one of the parts 31b is a rotating pair and the other is a rotating pair. In this case, the elevating actuator 37 is attached to the upper frame 20 or the lower frame 10 that is connected to one of the first connecting portion 31a and the second connecting portion 31b in a rotating pair.

  The link fulcrum portion 14 to which the elevating link 32 is connected is provided on the upper frame 20 or the lower frame 10 that is connected to one of the first connecting portion 31a and the second connecting portion 31b in a rotating pair. The length of the elevating link 32 at this time is equal to the length between one of the first connecting portion 31a and the second connecting portion 31b of the elevating lever 31 and the third connecting portion 31c.

  Further, the lift actuator 37 is attached to the upper frame 20 or the lower frame 10 that is connected to one of the first connecting portion 31a and the second connecting portion 31b in a rotating pair.

  The elevating lever 31 as described above has the other of the first connecting portion 31a and the second connecting portion 31b, that is, the side that is the rotational slip pair, as the upper frame 20 moves up from the low floor position PL to the intermediate position PM. , Move in one horizontal direction. The other of the first connecting portion 31a and the second connecting portion 31b moves in the other horizontal direction as the upper frame 20 moves up from the intermediate position PM to the raised floor position PH.

  Further, in the above-described embodiment, the lower body side bed section 40 and the upper body side bed section 50 are shown to tilt, respectively, but for example, the bed frame 2 includes the lower body side bed section 40 and the upper body side bed section 50. May be applied to the bed 1 which does not tilt.

1 bed 10 lower frame 20 upper frame 30 lifting mechanism 31 lifting lever 31a first connecting portion 31b second connecting portion

Claims (8)

A bed including a lower frame installed on a floor surface, an upper frame arranged above the lower frame, and a lifting mechanism that lifts and lowers the upper frame in a vertical direction with respect to the lower frame,
The elevating mechanism includes an elevating lever that connects the upper frame and the lower frame to each other so that they can move relative to each other and can swing about a horizontal axis.
The elevating lever includes a first connecting portion connected to the upper frame side and a second connecting portion connected to the lower frame side,
In the low floor position of the upper frame, the first connecting portion is located below the second connecting portion, and in the high floor position of the upper frame, the first connecting portion is the second connecting portion. Located above ,
The upper frame has auxiliary legs that land on the floor surface in the low floor position,
The bed is characterized in that the auxiliary leg is provided on a support part of the upper frame connected to the first connecting part of the elevating lever . One of the first connecting portion and the second connecting portion is a rotating pair,
The bed according to claim 1, wherein the other of the first connecting portion and the second connecting portion is a swivel pair that is horizontally slidable.   The other of the first connecting portion and the second connecting portion moves in one horizontal direction as the upper frame rises from the low floor position to the intermediate position, and the upper frame moves to the intermediate position. The bed according to claim 2, wherein the bed moves in the other direction in the horizontal direction as it rises from the above position to the raised floor position. The lifting mechanism further includes a lifting actuator that swings the lifting lever,
The bed according to any one of claims 1 to 3, wherein the elevating actuator is attached to the upper frame or the lower frame connected to one of the first connecting portion and the second connecting portion in a rotating pair. The elevating mechanism further includes an elevating link that connects the upper frame or the lower frame to the elevating lever and can swing about a horizontal axis.
The upper frame or the lower frame connected to one of the first connecting portion and the second connecting portion in a rotating pair includes a link fulcrum portion to which the elevating link is connected,
The bed according to any one of claims 1 to 4, wherein the elevating lever further includes a third connecting part to which the elevating link is connected between the first connecting part and the second connecting part.   The bed according to claim 5, wherein a length of the elevating link is equal to a length between one of the first connecting part and the second connecting part of the elevating lever and the third connecting part. The lifting mechanism includes at least four lifting levers,
The bed according to any one of claims 1 to 6, wherein the upper frame and the lower frame are connected by the elevating lever at at least four places. Wherein the lower frame, and adjacent to the auxiliary leg of the upper frame, bed according to any one of claims 1 to 7 guard member is provided.

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