JPH105286A - Bed equipment - Google Patents

Abstract

(57) [Problem] To provide a bed device capable of selectively and reliably performing swing drive and undulation drive of a floor plate. SOLUTION: A swing drive means 35 for rotating a floor plate body 61 in the width direction, an undulation drive means 71 for raising and lowering the floor plate body in a longitudinal direction intersecting the width direction, and controlling these drive means. In the bed apparatus having the control device 101, the control device receives a command signal for driving the driving sources 37 and 73 of the respective driving means and outputs an output signal based on the command signal. And a mutual drive inhibition circuit 105, 106 for inhibiting the pair of drive sources from being driven simultaneously, and the second drive source before the first drive source is operated to swing the floor plate. A forced return circuit 108 is provided, which is configured to activate the drive source and to preferentially return to an initial state in which the floor plate is not raised.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bed apparatus which is particularly effective for preventing bedsores of bedridden users such as sick and elderly people.

[0002]

2. Description of the Related Art A patient who cannot roll over or wake himself must remain in a supine position for a long period of time. As described above, if the patient remains in the supine position for a long period of time, a so-called bed sore occurs, and the patient's pain increases. Has to be converted appropriately,
Bed apparatuses having such a swing function have been developed.

[0003] In addition, when eating or reading on a bed device, a part of the floor panel is used to make it impossible to get up on its own or to maintain an upright posture easily. With an undulating configuration,
There is known a bed apparatus having an up-and-down function in which the up-and-down portion can be driven up and down. Recently, a bed apparatus having both the swing function and the undulating function has been developed.

[0004] The applicant of the present application has filed a Japanese Patent Application No. Hei 7 (1995) as such a bed apparatus having both the swing function and the undulating function.
No. -21964 (not disclosed). This bed apparatus has a base, and a mounting frame is provided on the base so as to be vertically movable by a vertical drive mechanism.

A supporting frame is mounted on the mounting frame, and a rotating frame is provided on the supporting frame so as to be swingable. A floor plate is provided on the rotating frame.

[0006] In the floorboard, side floorboards are rotatably connected to both sides in the width direction of the central floorboard only upward, and each floorboard has a plurality of predetermined lengths with respect to the longitudinal direction. It is divided into a floor and connected rotatably.

[0007] One of the plurality of floor portions of the central floor plate is fixed to the rotating frame. The rotating frame is set to have a width smaller than the width of the floor plate. The width of the support frame is set to be larger than that of the rotating frame, and the width of the support frame is set to be smaller than the width of the floor plate.

The support frame is provided with a swing drive mechanism for swingingly driving the rotary frame in the width direction.
The rotating frame is provided with an up / down drive mechanism for driving up / down the floor of the floor plate.

When the rotating frame is driven to swing in the width direction by the swing driving mechanism, the floor plate is interlocked and swings at a predetermined angle. Then, one of the side floor plates located on the lower side in the swinging direction contacts the upper surface of one side of the support frame and rotates upward, so that the user lying on the floor plate body can be prevented from falling. Has become.

By the way, in the bed apparatus having the above-mentioned structure, the floor plate body which is bent in the width direction and is in a swinging state cannot be raised and lowered in the longitudinal direction, and conversely, the floor plate body which is in the raised and lowered state can be changed. Cannot be swung in the width direction, and if the floor plate in one of the rocking state and the undulating state is driven to the other state, an excessive force is applied to the floor plate, and the floor plate is Or the drive mechanism may be damaged.

Therefore, it has been practiced to prevent a floor plate in one of the driving states from being driven into the other state. That is, it is detected by the limit switch whether or not the floor plate is in the swinging state and the undulating state, respectively. If the limit switch detects that the floor plate is in one of the states, the state is changed to the other state. In order not to be driven, it is controlled by a control circuit that inhibits so-called mutual driving.

That is, the limit switch detects whether or not the center floor of the floor plate is in a horizontal state (a state in which the swing angle is zero), and determines whether or not the undulation angle of each floor is zero. Is to be detected.

When the swing angle of the central floor panel and the undulation angle of each floor are detected by the limit switch, the load applied to the central floor panel and each floor may cause a detection error due to the movement of the weight of the user. There is. For example, when a floor plate in a swinging state (inclined state) is driven in the horizontal direction, when the user moves his weight by rolling over in the swinging direction of the floor plate, the movement of the weight causes the center to move. Deflection occurs in the floorboard. Therefore, immediately before the center floor plate becomes horizontal, the center floor plate may turn on the limit switch and stop the swing of the floor plate body.

In such a state, since the floor plate is electrically detected as being horizontal by the limit switch, it is possible to raise and lower this floor plate. However, by raising and lowering the floor plate, the load of the user applied to the center floor plate changes, and the limit switch that was turned on during the swing may be turned off.

In this case, since the floor plate is detected to be in the swinging state while being in the rising state, the operation is immediately stopped by the control circuit for inhibiting the mutual driving described above. After that, even if an attempt is made to restart the swinging or undulating operation, the floor plate is in a swaying state by a signal from each limit switch and is in an undulating state in the control circuit. Will not move either way.

[0016]

As described above, in the conventional bed apparatus, for example, despite the fact that the oscillatingly driven floor plate is not in a horizontal state, the distribution of the weight of the user on the floor plate is described. Changes, the floorboard may be detected as if it were horizontal.
The floor plate is driven up based on the detection result.

If the distribution state of the load of the user on the floor plate changes as the floor plate is driven up, the detection result changes, and the floor plate is moved in both the swinging state and the rising state. In this state, the driving of the floorboard is stopped in that state. That is, on the control circuit, the floor plate body oscillates and stops in the raised state, so that it is impossible to move from that state to either state.

The present invention has been made based on the above circumstances, and an object of the present invention is to disable the operation even if the floor plate is stopped in both the swinging state and the rising state on the control circuit. An object of the present invention is to provide a bed device which is prevented from becoming a bed.

[0019]

According to a first aspect of the present invention, there is provided a swing function for rotating a floor plate in a width direction and a back-raising function for raising and lowering the floor plate in a longitudinal direction intersecting the width direction. In the bed apparatus provided with: a supporting frame, a rotating frame that is swingably supported by the supporting frame and has the floor plate body provided on the upper surface side, and a first drive that swings the rotating frame Swing driving means having a second drive source provided on the rotating frame for driving a part of the floor plate up and down in a longitudinal direction thereof; A control device for controlling the driving of the first driving source and the second driving source of the undulating driving means, wherein the control device receives a command signal for driving each of the driving sources, and Output signal based on command signal , A mutual drive inhibition circuit for inhibiting the first drive source and the second drive source from being driven together, and operating the first drive source to remove the floor plate. Prior to rocking drive, a priority return circuit is provided for activating the second drive source and returning the floor plate body to an initial state in which the floor plate is not raised.

According to a second aspect of the present invention, in the first aspect, the mutual drive inhibition circuit is provided both inside and outside the control section. According to the first aspect of the present invention, since the control device is provided with the forcible return circuit, even when the floor plate is in both the swinging state and the rising state, the rising state is forcibly lowered. Therefore, even if a mutual drive prohibition circuit for preventing damage to the floor plate or the like is provided, it is possible to prevent the operation from being disabled.

According to the second aspect of the present invention, the mutual inhibition circuit is provided both inside and outside the control unit. Therefore, even if one of the mutual inhibition circuits malfunctions due to noise generated in the control unit, the mutual inhibition circuit does not swing. The two undulations are prevented from being performed together.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. The bed device shown in FIG. The base 1 is formed in a rectangular frame shape, and casters 2 with stoppers are provided at four corners on the lower surface. As shown in FIG. 3, a pair of brackets 3 are provided at both ends of the base 1 in the longitudinal direction at corresponding positions in the width direction. Each pair of brackets 3 has a pair of rotating shafts 5 constituting an up-down link mechanism 4.
Is installed rotatably. One end of a pair of levers 6 is fixed to both ends of each rotating shaft 5. Both ends of the support shaft 7 are fixed to the other end of each pair of levers 6. Rollers 8 are rotatably provided at both ends of the pair of support shafts 7, respectively.

One end of the first arm 9 is fixed to the middle of one rotating shaft 5, and the second arm 9 is fixed to the middle of the other rotating shaft 5.
The middle part of the arm 11 is fixed. One end and the other end of the interlocking rod 12 are pivotally connected to the other end of the first arm 9 and one end protruding downward of the second arm 11, respectively. A vertical drive mechanism 13 is provided on the upper surface of the intermediate portion of the
Is provided. The vertical drive mechanism 13 includes a drive source 14 swingably attached to the interlocking rod 12 and a drive shaft 15 driven forward and backward by the drive source 14.
The tip of the drive shaft 15 is pivotally connected to the other end of the second arm 11.

When the vertical drive mechanism 13 is actuated and its drive shaft 15 is driven in the projecting direction, the second arm 11 rotates counterclockwise as shown by the arrow a in FIG. One rotating shaft 5 is linked. When the second arm 11 rotates, the rotation causes the interlocking rod 12 to slide in the direction shown by the arrow b, and the first arm 9 to rotate counterclockwise as shown by the arrow c.

When the first arm 9 and the second arm 11 rotate in the same counterclockwise direction, the pair of levers 6 having one ends connected to the respective arms move from the laid-down state shown in FIG. To rotate.

The rollers 8 at both ends of the support shaft 7 connected to the respective levers 6 are rotatable on guide rails 22 having a U-shaped cross section provided on both inner surfaces of a mounting frame 21 having a rectangular frame shape. Is engaged. Therefore, the pair of levers 6
Is rotated in the upright direction, the mounting frame 21 is raised via the rollers 8 by the rotation. FIG. 11 shows a state in which the mounting frame 21 has risen above the base 1.

In order to prevent the raised mounting frame 21 from freely moving along the longitudinal direction by the engagement between the guide rail 22 and the roller 8, the mounting frame 21 and the lever 6 are connected to each other. As shown in FIG. 3, one end and the other end of the connection link 23 are rotatably connected to each other. The connecting link 23 prevents the placing frame 21 supported by the engagement of the rollers 8 of the guide rails 22 from freely moving in the sucking direction. By removing the connecting link 23, the mounting frame 21 can be disassembled from the base 1.

On the other hand, as shown in FIG. 4, the pivot 6 of the lever 6 is A, the midpoint in the longitudinal direction is B, the other end to which the roller 8 is attached is C, and one end is connected to the midpoint B. If the other end of the link 23 is D, AB, BD, BD, BC
Are set to AB = BD and BD = BC. Therefore, the triangle formed by the three points A, B, and D and the triangle formed by the three points A, B, and D are both isosceles triangles.

Each of the points A to D when the mounting frame 21 is raised as shown by a chain line in FIG.
', B', C ', D', A ', B', D '
The triangle formed by the points and the triangle formed by the three points A ', B', and D 'are also isosceles triangles.

Therefore, when the lever 6 is turned up in the upright direction from the lying state, the above-mentioned triangles maintain an isosceles triangle.
As shown by the arrow, it rises to the point D 'in the vertical direction. Also, point C
And point D are displaced upward to points C 'and D' while maintaining substantially the same height in the horizontal direction.

Therefore, the mounting frame 21 can be raised and lowered in a horizontal state without sliding in the horizontal direction, so that the mounting frame 21 is inclined or the longitudinal end of the mounting frame 21 hits a wall surface. Nothing.

On the upper surface of the mounting frame 21, a support frame 25 having a rectangular frame shape larger than the mounting frame 21 is removably mounted and fixed. As shown in FIGS. 2 and 3, the support frame 25 is formed by attaching vertical rods 28 via connecting members 27 to both ends of three horizontal rods 26 extending in the width direction. On the upper surface of each vertical rod 28, a contact plate 28a made of synthetic resin is provided over the entire length in the longitudinal direction.

A pair of receiving members 29 are provided upright at both ends of the pair of horizontal bars 26 located at both ends in the longitudinal direction of the support frame 25. Each receiving member 29 is formed with an arc-shaped concave portion 29a which is open on the upper surface and the inner surface.

A rotary frame 32 is disposed between the pair of vertical bars 28 of the support frame 25. A pair of support rollers 33 are rotatably provided on both longitudinal end surfaces of the rotating frame 32. Each support roller 3
Reference numerals 3 are engaged and supported by recesses 29a formed in the receiving member 29, respectively.

At both ends of the pair of vertical rods 28 of the support frame 25, connecting brackets 30 are vertically provided with their upper ends fixed. The lower ends of the connection brackets 30 are detachably attached to the four corners of the mounting frame 21 as shown in FIG. Therefore, the support frame 25 is interlocked with the vertical movement of the mounting frame 21.

As shown in FIG. 2, between the two ends of a pair of horizontal rods 26 located at one longitudinal end of the support frame 25 and the middle part.
As shown in FIGS. 3 and 6, a pair of mounting rods 34 are provided. Between the intermediate portions of the mounting rods 34, the horizontal
An auxiliary horizontal rod 26a is provided in parallel with the sixth rod 6. These rod members 26, 26a, 34 are provided with a swing drive means 35 for swingingly driving the rotary frame 32 in the left-right direction.

The swing drive means 35 is configured as shown in FIGS. That is, as shown in FIG. 6, a bracket 36 is provided on the lower surface side of one of the mounting rods 34, and one end of a drive source 37 is pivotally attached to the bracket 36. The drive source 37 includes a motor 38a, and a screw shaft 38b that is rotationally driven by the operation of the motor 38a.
And a movable body 38c that moves along the screw shaft 38b.

A pair of L-shaped first links 39 constituting a link mechanism 40A shown in FIG.
Is pivoted at one end. The other ends of the first links 39 are fixed to the support shaft 41. This support shaft 41 is shown in FIG.
As shown in FIG. 6, it is rotatably mounted on a bracket 40 erected on one of the horizontal rods 26 and the auxiliary horizontal rod 26a.

One end of the support shaft 41 protrudes from one bracket 40 toward the other horizontal rod 26, and one end of a second rod 42 having a straight rod shape is fixed to the protruding end. An interlocking pin 43 protrudes from the other end of the second link 42. The interlocking pin 43 is slidably engaged with a long hole 44a, 45a formed at a predetermined length from one end side in the longitudinal direction of the third link 44 and the fourth link 45 to a halfway portion and cannot be pulled out. I agree.

The third link 44 and the fourth link 45
One end of a connecting pin 46 is pivotally connected to the other end of the connecting pin 46 as shown in FIG. One end of each of the connection links 47a and 47b and one side surface of a holding member 49 fixed to both ends of the steady rest link 48 are pivotally connected to each connection pin 46, respectively. The other end of each of the connecting links 47a and 47b is pivotally connected to both ends in the width direction of one longitudinal end of the rotating frame 32, respectively.

The other ends of the connecting links 47a and 47b and the supporting rollers 33 provided at both ends of the rotary frame 32 are rotated by a single pin 51 as shown in FIG. 7 (only 47b is shown). It is attached to the frame 32.

The other side surface of the holding member 49 is provided with a substantially L-shaped anti-sway groove 50 as an engaging portion, which is open to one end surface and the lower end surface located on the inner side in the width direction of the support frame 25. Are formed. As shown in FIGS. 7 and 9, an engaging pin 52 as an engaging body protruding from the other horizontal rod 26 toward the auxiliary horizontal rod 26 a slides in the steady groove 50 of the pair of holding members 49. Freely engaged. As shown in FIG. 9, the distance L1 between the pair of engaging pins 52 is set slightly larger than the distance between the open ends of the pair of steady grooves 50 and smaller than the distance L2 between the ends of the steady grooves 50. Have been.

When the rotating frame 32 is in a horizontal state, the pair of engaging pins 52 are engaged with the steadying grooves 50 of each holding member 49. Thereby, the rotating frame 32
Are held without rattling in the left-right direction. That is, since the rotating frame 32 is swingably supported by the link mechanism 40, the link mechanism 4
When 0A is not driven, that is, when the rotating frame 32 is in a horizontal state, it is inevitable that the links play in the swinging direction due to the play of each link.

However, when the rotating frame 32 is in a horizontal state, the pair of engaging pins 52
9, the rotation frame 32 is prevented from swinging in the left-right direction.

In FIG. 8, the movable body 38c of the drive source 37
Is driven in the direction of the arrow A, the first link 39 rotates in the direction of the arrow B, and when the second link 42 interlocks with the rotation, the first link 39 is provided at the other end of the second link 42. The interlocking pin 43 engages with the upper end of the long hole 45a of the fourth link 45 to rotate the link 45 in the upright direction shown by the arrow D in FIG. Slide.

When the fourth link 45 starts to rotate,
By this rotation, the steady rest link 48 is also slid in the horizontal direction indicated by the arrow C. Thereby, the steadying groove 50 of one holding member 49 located on the upper end side of the fourth ring 45 is disengaged from the one engaging pin 52, and the other engaging pin 52 is prevented from swinging by the other holding member 49. It slides relatively to the terminal side of the groove 50.

As a result, the steady link 48 is rotatable about the other engaging pin 52 as a fulcrum, and is rotated in conjunction with the rotation of the fourth link 45. When the steady rest link 48 rotates, the rotating frame 32 rotates the connecting links 47a and 47 as shown by a chain line in FIG.
Interlock through b. That is, the other end of the rotating frame 32 rises above the support frame 25 with the support roller 33 at one end in the width direction supported by the concave portion 29a of the receiving member 29 as a fulcrum.

When the first link 39 is rotated in the direction opposite to the arrow B while the rotating frame 32 is inclined, and the movable body 38c of the drive source 37 is driven in the direction opposite to the arrow A,
The rotating frame 32 and the steady rest link 48 rotate in the falling direction. When the steady rest link 48 descends to a substantially horizontal state, the steady rest groove 5 of one of the holding members 49 is formed.
The one engagement pin 52 abuts on the lower surface 50a (shown in FIG. 9) of the open end 0. When the first link 39 is further driven from this state, the interlocking pin 43 slides up the long hole 44a of the third link 44 to abut on the end, and this third link 44 is indicated by an arrow E in FIG. Press in the direction shown. Accordingly, the steady link 48 slides in the horizontal direction opposite to the arrow C, so that the one engaging pin 52 is engaged with the steady groove 50 of the one holding member 49 again. That is, the rotating frame 32 is held in a horizontal state where the rotating frame 32 hardly swings in the left-right direction.

From this state, the movable body 38c of the drive source 39
Is driven in a direction opposite to the previous direction, that is, in a direction opposite to the arrow A,
Since the third link 44 rises in the rising direction, the rotating frame 32 can be swung about the other end in the width direction as a fulcrum.

The support frame 25 and the rotating frame 32
A floor plate 61 is provided on the upper surface side. As shown in FIG. 10A, the floor plate 61
2 and a pair of side floor plates 64 connected to both sides of the center floor plate 62 by hinges 63 having a configuration described later so as to be rotatable only in the ascending direction. .

Each of the floor plates 62 and 64 has a plurality of, in this embodiment, first to fourth, four floor portions 62a to 62d and 64a.
６４64d, and the floor portions of the respective floor plates 62, 64 are sequentially connected to the four mounting frames 65a〜6 rotatably.
5d. The floor portions 62a to 62d of the central floor plate 62 are attached to the mounting frames 65a to 65d.
, Each floor portion 62a-6 of the side floor plate 64
2d is mounted on the mounting frames 65a to 65d so that it can rotate upward.

Of the floors, only the second floor 62b of the central floor plate 62 is detachably fixed to the rotating frame 32, and the other floors are placed on the rotating frame 32. Has only become.

As shown in FIG. 10B, each floor portion 62a
62d and 64a to 64d are integrally formed by blowing the synthetic resin between the central floor plate 62 and the pair of side floor plates 64. The center floor plate 62 and the side floor plate 64 are formed into a hollow shape having a predetermined thickness, and the upper end in the thickness direction of the center floor plate 62 and the upper end in the thickness direction of the side floor plate 64 are connected to the hinge 6.
3 are integrally connected by a thin portion.

Therefore, the side floorboards 64 are connected to the central floorboard 62.
Can be rotated in the ascending direction shown by the chain line in the same figure, and the downward rotation is regulated by the contact between the opposing end faces 62a, 64a of the floor plates 62, 64. I have.

At the time of blow molding, a plurality of ventilation holes 66 are formed in each floor portion in the thickness direction thereof. Thus, the floor plate 61 has air permeability in the thickness direction.
Each of the floors 62a to 62d and 64a to 64d is made of two types of molded bodies having different lengths, and a pair of floors located at both ends in the longitudinal direction is formed by arranging two molded bodies in parallel. The two floors located therebetween are formed by one molded body having different lengths.

When the rotating frame 32 is rotated by the swing driving means 35 and the rotation of the center floor plate 62 of the floor plate 61 interlocks with the rotation, one of the side floor plates 64 located in the ascending direction becomes the center floor plate. The other side floor plate 64 located on the lower end side is kept in contact with the abutment plate 28a provided on the side of the support frame 25 to prevent downward rotation. As a result, it is bent upward at a predetermined angle.

Thus, the user lying on the floor plate 61 is shifted (raised) from left to right by the central floor plate 62 that rotates in the left-right direction, and is bent toward the upper surface of the central floor plate 62 at that time. The side floor plate 64 prevents the user from falling off the floor plate body 61.

The support frame 25 may be provided with a roller (not shown) instead of the contact plate 28, and the roller may be brought into contact with the side floor plate 64 and bent. As shown in FIG. 3, a floor portion 61 a of each of the floor plates 62 and 64 of the floor plate body 61,
An undulation drive means 71 for undulating the 64a is provided. The undulation drive means 71 includes a box 72 having a built-in power transmission mechanism (not shown), and a pair of drive sources 73 provided on one side and the other side of the box 72.
A first rotating shaft 74 provided at one end of the box 72 so as to protrude from both sides from both sides thereof and rotationally driven by the one driving source 73; The second rotating shaft 7 which is provided so as to protrude both ends from the other and is rotationally driven by the other driving source 73
And 5. Both ends of each of the rotating shafts 74 and 75 are rotatably supported by brackets 76 provided on both sides of the rotating frame 32, respectively.

One end of a first lifting arm 77 is fixed to both ends of the first rotating shaft 74, and the second rotating shaft 75
One end of a second push-up arm 78 is fixed to both ends of the arm. Rollers 79 are rotatably provided at the other ends of the push-up arms 77 and 78, respectively.

The roller 79 provided on the first lifting arm 77 is provided with a mounting frame 65a to which the first floor portion 62a of the central floor plate 62 shown in FIG.
The roller 79 provided on the second push-up arm 78 comes into contact with the mounting frame 65c of the third floor portion 62c of the central floor plate 62.

Each roller 79 is attached to each mounting frame 65a,
When the first rotary shaft 74 is driven to rotate in the state of being rotated in contact with the first floor 65c and the first push-up arm 77 is rotated in the ascending direction, the first floor portion 62a of the central floor plate 62 ascends in the rising direction. The first floor 6 of the pair of side floor boards 64
4a is also linked.

When the second rotary shaft 75 is driven to rotate and the second push-up arm 78 is rotated in the upward direction,
The third floor portion 62c of the central floor plate 62 is turned in the upright direction, and the fourth floor portion 62d is interlocked with the third floor portion 62c. Further, when the third and fourth floor portions 62c and 62d of the center floor plate 62 rotate, the third and fourth floor portions 64c and 64d of the pair of side floor plates 64 also move.

The swing drive means 35 and the undulation drive means 71 are driven and controlled by a control device 101 shown in FIG. The control device 101 includes a control unit 10 including a CPU.
2 A remote controller 103 is connected to the control unit 102. A command signal for driving the swing driving means 35 and the undulation driving means 71 by the remote controller 103 is transmitted to the control unit 102.
Can be entered. A display unit 104 is connected to the control unit 102.
Reference numeral 4 indicates that the command signal selected by the remote controller 103 can be graphically displayed.

Further, the remote controller 103
Can select between automatic operation and manual operation of the swing of the floor plate 61, and can set a swing angle and a swing cycle in the swing motion.

The control unit 102 outputs a swing signal and a back-raising signal. The control unit 102 is provided with a first mutual drive inhibition circuit 105, which inhibits simultaneous output of both the swing signal and the back raising signal.

The swing signal and the backrest signal output from the control unit 102 are input to a second mutual drive inhibition circuit 106 provided outside the control unit 102, and then output to the drive circuit unit 107. Is done. That is, the control unit 102
Despite the provision of the first mutual drive inhibition circuit 105, even if a malfunction occurs due to noise or the like generated by the control unit 102 and the swing signal and the back raising signal are output simultaneously, Two signals are prevented from being simultaneously output to the drive circuit unit 107 by the second mutual drive inhibition circuit 106.

The drive circuit 107 outputs a drive signal for driving the drive source 37 of the swing drive means 35 and a pair of drive sources 73 of the undulation drive means 71, respectively. Thereby, the swing drive and the undulation drive of the floor plate 61 are performed.

Further, the control section 102 is provided with a priority return circuit 108 for preferentially driving the floor plate 61 from the rising state to the falling state prior to the swing driving or the raising / lowering driving. The return signal output from the priority return circuit 108 is input to the drive circuit unit 107. The drive circuit 107 outputs a drive signal for forcibly driving the floor plate 61 in the falling direction. As a result, the floor plate 61 is forcibly driven in the falling direction by the driving source 73 of the up / down driving means 71.

The initial state (horizontal state) when the floor plate 61 swings and the initial state (flat state) when the floor plate 61 undulates.
Is detected as schematically shown in FIGS. 13A and 13B. That is, the initial state at the time of swinging is the floor plate 61
Is detected by first and second limit switches 111 and 112 provided at both ends in the width direction on the lower surface side of the central floor plate 62. That is, when the floor panel 61 is not swinging and is in a horizontal state, both the first and second limit switches 111 and 112 are connected to the central floor panel 6.
When the floor frame 61 is in a swinging state by being pressed by the rotating frame 32 supporting the supporting plate 2, only one of the limit switches is turned on and the other is turned off.

The initial state of the floor plate 61 when it is raised and lowered is such that when the first floor 62a is in a horizontal state, it is pressed by the first lifting arm 77 that raises and lowers the first floor 62a. Third limit switch 113 to be turned on
Is detected by the fourth limit switch 114 that is turned on by being pressed by the second push-up arm 78 that raises and lowers the third floor portion 62c when the third floor portion 62c is in a horizontal state. . That is, when the first floor portion 62a or the third floor portion 62c is raised from the flat state, the third or fourth limit switch is turned off.

The first to fourth limit switches 11
4 from the first mutual drive inhibition circuit 10
5 and the second mutual drive inhibition circuit 106.
That is, the first and second mutual drive inhibition circuits 105 and 106
When any of the limit switches detects that the floor plate 61 is in either the swinging state or the rising state, the detection signal from the limit switch causes the state to be switched to the other state. In order to prevent the floor board 61 from being driven, the input of a swing signal or a back-raising signal to the drive circuit unit 107 is prohibited. When the floor plate 61 is in both the swinging state and the rising state, the floor plate 61 cannot be driven in any of the swinging state and the up-and-down state.

Next, the operation of the bed apparatus having the above configuration will be described. The floor plate 61 provided on the upper surface side of the support frame 25 moves up and down and rotates in the width direction (rolling).
And three operations of raising and lowering the floor.

In order to perform the up and down operation, the up and down drive mechanism 13 is operated to drive the drive shaft 15 in the projecting direction. As a result, the levers 6 provided at both ends thereof can be raised from the fall-down state via the pair of rotation shafts 5.
1 can be raised.

Since the rotating frame 32 on which the floor plate 61 is mounted is provided on the upper surface side of the mounting frame 21 via the support frame 25, these are raised in conjunction with each other. That is, when a patient lying on the floor plate 61 is to be cared for or consulted, the height of the floor plate 61 can be adjusted so that the patient can easily do this. When getting on and off the
By making the floor plate 61 sufficiently low, getting on and off becomes easy.

To rotate the floor plate 61 in the width direction, the drive source 37 of the swing drive means 35 is operated to drive the link mechanism 40A. In the link mechanism 40A, the third link 44 or the fourth link 45 is driven in the ascending direction according to the moving direction of the movable body 38c of the driving source 37.

When the fourth link 45 is driven in the ascending direction, as described above, the rotating frame 32 has the other end in the width direction with the roller 51 engaged with the concave portion 29a of the receiving member 29 at one end in the width direction as a fulcrum. Rotate up.

When the other end of the rotating frame 32 is raised with the one end in the width direction as a fulcrum, the floor plate 61 is interlocked with the rotation. That is, as shown by the chain line in FIG. 8, the floor plate 61 has its central floor 62 raised at one end in the width direction at the other end, whereby one side floor plate 64 connected to one end in the width direction is The lower surface is the contact plate 2 of the support frame 25.
The other side floor plate 64, which is bent upward in contact with 8 a and is connected to the other end side, cooperates with the center floor plate 62 in the same plane.

If the drive source 37 is operated so that the third link 44 is driven in the upward direction, the rotation frame 3
2 can be rotated in a direction opposite to the previous direction. Therefore, if the drive direction of the movable body 38c by the drive source 37 is changed, for example, every predetermined time, the center floor 62 of the floor plate 61 can be alternately rotated left and right by the rotating frame 32.

If the center floor board 62 is alternately rotated left and right at predetermined time intervals, the body position of the user lying on the floor board body 61 can be changed to left and right. Thereby, it is possible to prevent a sick or elderly person who needs to lie for a long period of time from incurring a floor collapse, and one end side in the width direction which is the base end side of the rotating central floor plate 62. Is bent upward, and the floor plate 61 is substantially L-shaped.
The character shape prevents the user whose posture has been changed leftward or rightward from falling from the floor plate 61.

As described above, when changing the position of the user who is supine on the floor plate 61, the center floor plate 62 is driven in a direction in which the other end rises with one end in the width direction as a fulcrum.
For this reason, the center floor plate 62 can be rotated without displacing the one end in the width direction, which is the lower end side of the rotating center floor plate 62, substantially below the support height of the floor plate body 61. Even if the supporting height of the user is sufficiently low, the user can change the posture of the user by rotating the central floor plate 62 in the left-right direction.

When the center floor board 62 is rotated left and right to change the user's body position, if the support height of the floor board body 61 is high, the user may feel uneasy. It is better to do it in

If the supporting height of the floor plate 61 can be made sufficiently low, it is easy to get on and off the floor plate 61, so that the user can get on and off without a caregiver, especially for a sick or elderly person. Sometimes it becomes.

When the floor plate 61 is in a horizontal state, a pair of engagement pins 52 provided on the support frame 25 are provided.
Engages with a steadying groove 50 of a holding member 49 provided on the rotating frame 32 side, and prevents the rotating frame 32 from swinging in the left-right direction.

Therefore, when the rotating frame 32 is used in a horizontal state, it is possible to prevent the floor plate 61 from rattling in the left-right direction and giving the user discomfort. That is, even when the rotating frame 32 is swung by the link mechanism 40A, the rotating frame 32 can be prevented from rattling.

In addition, the engagement pin 52 and the steadying groove 5
When the link mechanism 40A is engaged, the link mechanism 40A is automatically engaged and disengaged by activating the link mechanism 40A. Since no operation is required at all, it is easy to use and very convenient.

To raise the floor plate 61, the floor plate 61 is set horizontal and the up / down driving means 71 is operated. That is, the pair of drive sources 73 is operated to rotate the first rotary shaft 74 and the second rotary shaft 75, and the push-up arms 77 and 78 are linked with it.

When the first push-up arm 77 is driven in the ascending direction, as shown by a chain line in FIG.
Is raised, and the first floor portions 64a of the pair of side floor plates 64 are also interlocked with it, so that the user can raise the upper body. When the second push-up arm 78 is driven in the ascending direction, the third floor portion 62c of the central floor plate 62 is turned in a direction in which the other end side ascends with one end connected to the second floor portion 62b as a fulcrum. Therefore, one end side of the fourth floor portion 62d connected to the other end also moves up.

That is, the third floor portion 62c and the fourth floor portion 6
2d is bent in a substantially U-shape, and the third and fourth floor portions 64c and 64d of the pair of side floor plates 64 are also interlocked therewith. Therefore, the user whose upper body has been raised can be bent in a U-shaped manner by the third floor portions 62c, 64c and the fourth floor portion 62d,
Since the legs are held in a bent state by 64d, the posture in which the upper body is raised can be easily maintained.

Since the mounting frame 21, the support frame 25 and the floor plate 61 are detachably provided on the base 1, by removing these, the carrying such as transportation can be carried out easily. It becomes possible.

Next, control in the case where the floor plate 61 is driven to swing and undulate by the flow charts shown in FIGS. 14 and 15 will be described. As shown in FIG. 14, the power of the control device 101 is turned on.
In step 1 (step 1), automatic or manual selection is performed.

When the automatic mode is selected, first, S2 shown in FIG.
It is determined whether the floor plate 61 is in the lying state (flat state) or the rising state as shown by the arrow. If not, the floor board 61 is preferentially driven in the falling direction as shown by S3. . That is, the priority return circuit 108 of the control unit 102
, A return signal is output to the drive circuit unit 107, and the drive signal 73 of the undulation drive means 71 is preferentially driven by this return signal to drive the floor plate 61 in the falling direction.

Next, it is determined whether or not the floor plate 61 is in a swinging state as indicated by S4. If the floor plate 61 is in a swinging state, the swing angle of the floor plate 61 is reduced to zero as shown in S5. Will be returned. That is, the swing signal is output from the control unit 102 and the drive source 35 of the swing drive unit 37 is operated so that the swing angle of the floor plate 61 becomes zero.

When the floor plate 61 is in an upright state and in a swinging state, the control unit 102 and first and second mutual drive inhibition circuits 105 provided outside the control unit 102 are provided. Due to 106, the floor plate 61 cannot be driven by any of the undulating drive and the swing drive.

However, the control unit 102 is provided with the priority return circuit 108. Therefore, the first to fourth limit switches 111 to 114 for detecting the swinging state and the undulating state of the floor plate 61 detect that the floor plate 61 is in both the swinging state and the rising state. However, the return signal from the priority return circuit 108 drives the switch from the rising state to the initial falling state preferentially.

Therefore, even when the floor plate 61 is in both the swinging state and the rising state, the floor plate 61 is not driven. When the floor plate 61 is returned to the flat and horizontal state in S5, the automatic operation is performed in S6 according to the preset automatic mode. In other words, the floor plate 61 is swingably driven by a swing angle and a swing cycle which are set in advance in order to prevent the user from falling off the floor.

Next, when the automatic operation is completed as shown in S7, it is determined whether or not the floor plate 61 is in a swinging state as shown in S8, and if it is not horizontal, it becomes horizontal as shown in S9. Driven as follows. Then, it is determined whether or not the floor plate 61 is in the lying state as shown in S10, and if it is in the upright state, it is driven in the falling direction as shown in S11 to end the automatic operation cycle.

On the other hand, when manual operation is selected in S1, four types of operations shown in FIG. 15 can be selected by push buttons provided on the remote controller 103.

That is, when the floor plate 61 in the upright state is caused to fall down as shown at S12 as the first manual operation, the floor plate 61 is given priority by the priority return circuit 108 provided in the control unit 101. It is driven in the falling direction.
This is indicated by S13. Then, in S14, it is determined whether the floor plate 61 has fallen down, and if it is confirmed that it has fallen down, the operation ends.

As shown in S15 as the second manual operation,
When the floor plate 61 in the swinging state is returned to the horizontal state, the floor plate 61 is preferentially driven in the falling direction by the priority return circuit 108 as shown in S16 by the command signal.

In S17, it is determined whether or not the floor plate 61 has fallen flat, and if it is confirmed that the floor plate 61 is flat, the drive source 37 of the swing driving means 35 causes the floor plate 61 to fall as shown in S18. Are driven in the horizontal direction. In S19, the horizontal state of the floor plate 61 is determined, and if it is horizontal, the second manual operation ends.

As a third manual operation, when the flat floor plate 61 is driven in the upright direction as shown in S20,
The command signal drives the floor plate 61 in a horizontal state as shown in S21. In S22, it is determined whether or not the floor plate 61 is horizontal. If horizontal, the floor plate 61 is driven in the upright direction as shown in S23.

When the floor plate 24 is swung as shown in S24 as a fourth manual operation, first, as shown in S25, the floor plate 61 is driven by the priority return circuit 108 to be preferentially flat. You. In S26, it is determined whether or not the floor plate 61 is flat, and if it is flat, the swing operation of the floor plate 61 is started as shown in S27.

S28 is a stop command for manual operation, and the stop command can stop the floor plate 61, which is manually operated, at a predetermined rising angle or swing angle as shown in S29.

As described above, even in the manual operation, when a predetermined operation is instructed, the floor plate 61 is switched to the priority return circuit 108.
After that, the vehicle is driven preferentially in the falling direction, and then a predetermined command operation is performed.

Therefore, even if the floor plate 61 is in both the upright state and the swinging state on the control circuit, the first and second mutual drive inhibition circuits 105 and 106 are provided. Instead, the priority return circuit 108 causes the floor plate 61 to be preferentially driven from the standing state to the falling state.

As a result, the standing state of the floor panel 61 is released, and the first and second mutual drive inhibition circuits 1
Since the driving of the floor plate 61 is not hindered by 05 and 106, it is possible to perform the undulating operation and the swinging operation of the floor plate 61.

Further, a first mutual drive inhibition circuit 105 is provided in the control section 102, and a second mutual drive inhibition circuit 106 is provided outside the control section 102. Therefore, even if one of the mutual drive inhibition circuits malfunctions,
Since it is backed up by the other circuit, the floor plate 6
When the device 1 is in the upright state, it can be reliably prevented from swinging.

In particular, the first mutual drive inhibiting circuit 105 provided in the control unit 102 may malfunction due to noise or the like generated in the control unit 102. By providing the prohibition circuit 106,
Even if the first mutual drive inhibition circuit 105 malfunctions, the second mutual drive inhibition circuit 106 can reliably prevent the floor plate 61 in the rising state from swinging.

The present invention is not limited to the above embodiment,
Various modifications can be made without departing from the spirit of the invention. For example, the mutual drive inhibition circuits are provided inside and outside the control unit, but may be provided only in one of them.

[0110]

As described above, according to the first aspect of the present invention, in a bed device capable of swinging and raising and lowering a floor plate, it is prevented that the floor plate is rocked when the floor plate is in a raised state. And a priority return circuit for driving the floor plate from the standing state to the falling state preferentially before swinging the floor plate.

Therefore, when the floorboard is in both the upright state and the swinging state, the floorboard is first laid down by the above-mentioned priority return circuit. It is possible to drive the floor plate in both of the swinging states. That is, there is no possibility that the floorboard cannot be moved at all.

According to the second aspect of the present invention, the mutual drive inhibition circuit is provided both inside and outside the control unit. Therefore, even if one of the circuits malfunctions, the other is in the swinging state or the rising state by the other. Can be reliably prevented from being raised or rocked.

[Brief description of the drawings]

FIG. 1 is a front view showing the entire configuration of an embodiment of the present invention.

FIG. 2 is a plan view of the support frame with a part thereof omitted.

FIG. 3 is also a base, a support frame and a rotary frame.
FIG.

FIG. 4 is an explanatory view when the mounting frame is raised.

FIG. 5 is an exploded perspective view of a link mechanism portion of the swing drive unit.

FIG. 6 is a plan view of the swing driving means.

FIG. 7 is a side view of the swing drive unit.

FIG. 8 is a front view of the swing drive unit.

FIG. 9 is an enlarged front view of the steady rest link.

10 (a) is a plan view of the floor plate body as viewed from the lower surface side, and FIG. 10 (b) is an enlarged cross-sectional view of the same along line XX in FIG. 10A.

FIG. 11 is an exploded perspective view showing an outline of the overall configuration.

FIG. 12 is a block diagram of the control device.

FIG. 13 is a layout diagram of limit switches for detecting the swinging state and the standing state of the floor plate.

FIG. 14 is a flowchart for explaining a part of the operation.

FIG. 15 is a flowchart for explaining a part of the operation.

[Explanation of symbols]

 25 support frame 32 rotating frame 35 swing driving means 37 drive source 40A link mechanism 61 floor plate 62 center floor plate 64 side floor plate 71 undulating drive means 102 control unit 105 ... First mutual drive inhibition circuit 106... Second mutual drive inhibition circuit 108.

Claims (2)

[Claims] 1. A bed apparatus having a swinging function of rotating a floor plate in a width direction and a back-raising function of raising and lowering the floor plate in a longitudinal direction intersecting the width direction. A rotating frame that is swingably supported by the support frame and has the floor plate provided on an upper surface side; a swing driving unit having a first drive source that swings the rotating frame; An up-down drive unit provided on a frame and having a second drive source for driving up and down a part of the floor plate body in the longitudinal direction thereof; a first drive source of the swing drive unit and a second up-down drive unit of the up-down drive unit A control unit for controlling driving with the second drive source, wherein the control unit receives a command signal for driving each of the drive sources and outputs an output signal based on the command signal. And the first A mutual drive prohibition circuit for prohibiting the driving source and the second driving source from being driven together, and the second driving source is operated before the first driving source is operated to swing the floor plate. A priority return circuit for activating the drive source of (1) and returning the floor plate body to an initial state in which the floor plate is not raised. 2. The bed apparatus according to claim 1, wherein the mutual drive inhibition circuit is provided both inside and outside the control unit.