JPH0740976B2 - Bed equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to a bed apparatus capable of converting a bed state into a chair.

(Prior art) For users such as the elderly and sick who cannot stand up by themselves on the bed, the floor part provided in the bed body is divided into multiple parts, and the part corresponding to the upper body of the user There is known a so-called undulating bed apparatus capable of undulating a bed.

According to such a bed apparatus, the user can easily raise the upper body on the bed. However, when the user is an old person or a sick person whose legs and feet are weak, it may not be possible to immediately get out of the bed and stand up by merely raising the upper body on the bed.

(Problems to be Solved by the Invention) As described above, even in the case of a user with weak legs who cannot get down from the bed and stand up by himself / herself, assistance from a supine state on the bed to a state close to the standing posture can be assisted. In many cases, they can stand up. Therefore,
For such a user, it is desired to develop a bed apparatus that can not only raise the back but also change the body posture to a state close to a standing posture.

The present invention has been made in view of the above circumstances. The purpose of the present invention is not only to raise the upper half of the user's body but also to raise the upper half of the user's upper body so that the user can easily stand up. It is an object of the present invention to provide a bed apparatus capable of tilting a seated portion of a person in a state of falling forward.

[Structure of the Invention] (Means and Actions for Solving the Problems) In order to solve the above problems, the present invention provides a bed body,
A movable frame, which is swingably connected to a middle portion in the longitudinal direction of the bed body by a parallel link mechanism and has a waist floor portion provided on the upper surface, and a movable frame which is juxtaposed on one end side of the waist floor portion and has one end pivotally connected to the movable frame. The back floor part, the guide member provided along the longitudinal direction of the bed main body on the lower surface side of the waist floor part, the slider slidably provided on the guide member, and the slide of the slider. Activating and undulating the back floor portion with one end as a fulcrum, a stopper mechanism that holds the slider in a slidable state when the back floor portion is upright, and one end pivotally attached to the slider. A drive source is connected to the other end, and the drive source is driven to move back and forth in the axial direction to slide the slider along the guide member. A drive shaft that drives the parallel link mechanism by being operated integrally with the movable frame by a drive mechanism to swing the movable frame in a direction in which the waist floor of the upper surface of the movable frame inclines forward and downward. And.

With such a configuration, the bed is converted into a chair by erecting the back floor and rotating the leg floor downward, so that the user lying on the bed wakes up and sits on the waist. You can take the posture of sitting in the club. Then, by tilting the lower back part forward, the user sitting on the lower back part is urged forward, so that the user can easily stand up.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.
The bed apparatus shown in FIGS. 3 to 5 has a bed body 1. The bed body 1 is composed of a fixed frame 2 and a separation frame 3. In the fixed frame 2, one end of a first side member 4 having a U-shaped cross section and a second side member 5 shorter than the first side member 4 are connected and fixed to both ends of the first lateral member 6. There is. A pair of first casters 7 is attached to the lower surface sides of both ends of the first lateral member 6.

The separation frame 3 includes a third side member 8 slidably inserted into the first side member 4, and the third side member 8
A pair of second lateral members 9 whose one ends are connected and fixed to each other, and a fourth side member 11 which is connected and fixed to the other ends of these second lateral members 9.
The second casters 12 are attached to the lower surface side of one end of the second lateral member 9 and the lower surface sides of both ends of the fourth side member 11, respectively.

One end of the rack 13 is connected to one end of the third side member 8 of the separation frame 3 as shown in FIG. A pinion 14 meshes with the rack 13. This pinion 14
Is fitted to the output shaft 16 of the first drive source 15 with a speed reduction mechanism provided on the inner surface of the middle portion of the first side member 4.
Therefore, when the first drive source 15 is operated and the pinion 14 is rotationally driven, the rack 13 meshed with the pinion 14 is driven in the first side member 4 along the longitudinal direction.
The separation frame 3 connected to the rack 13 is driven in a direction of approaching and separating from the fixed frame 2. FIG. 5 shows a state in which the separation frame 3 is separated from the fixed frame 2, and when driven in the joining direction from this state, the ends of the second side member 5 and the fourth side member 11 are respectively separated. The provided L-shaped engaging members 5a and 11a engage with each other to form the bed body 1 into a rectangular frame shape. As shown in FIGS. 3 and 4, a head board 17 is erected on the end surface of the fixed frame 2, and a foot board 18 is erected on the end surface of the separation frame 3.

As shown in FIG. 5, a base frame is provided at a position corresponding to the fixed frame 2 in the middle of the bed body 1 in the longitudinal direction.
21 are provided. The base frame 21 has a rectangular frame shape, and both upper ends are fixed to the fixed frame 2. A second drive source 22, a hollow drive shaft 23 driven forward and backward by the second drive source 22, and a drive shaft 23 are slidable at one end of the fixed frame 2 located on the headboard 17 side. A drive unit 24, which is integrated with the tubular body 23a inserted in the drive unit 24, is pivotally mounted. Although details of the drive unit 24 are not shown, a rotation shaft (not shown) that is rotationally driven by the second drive source 22 is provided in the base end portion of the cylindrical body 23a. A nut portion (not shown) is also formed at one end of the rotary shaft, and a male screw portion (not shown) formed at the base end of the drive shaft 23 is screwed into the nut portion.
The drive shaft 23 is held by the cylindrical body 23a while being prevented from rotating. Then, the rotary shaft is
When the drive source 22 is rotationally driven, the drive shaft 23 can be moved forward and backward in the axial direction.

A movable frame 25 is provided at a position corresponding to the fixed frame 2.
Is provided. The movable frame 25 is formed in a rectangular shape in plan view, and a pair of connecting portions 26 are vertically provided from both sides of the lower surface of the one end side opposite to the head board 17, as shown in FIG. Each of the connecting portions 26 and the pair of supporting portions 27 projecting from one end of the base frame 21 are pivoted at both ends of a first parallel link 28 and a second parallel link 29 constituting a parallel link mechanism. It is worn. Each parallel link 28,
One ends 28a, 29a of the 29 are pivotally attached to the same position in the front-rear direction of the support portion 27, and the other ends 28b, 29b are pivotally attached in a deviated direction. In other words, the other end 28b of the first parallel link 28 is pivotally attached to the drive unit 24 side with respect to the other end 29b of the ninth parallel link 29. As a result, the movable frame 25 can swing from the lowered position shown by the solid line in FIG. 2 to the raised position shown by the chain line as will be described later.

To the movable frame 25, one end of a back floor 31 is rotatably connected to the other end located on the head board 17 side, and a waist floor 32 is placed and fixed on the upper surface. Long holes 33 are formed on both sides of one end of the waist floor portion 32 on the footboard 18 side. A support shaft 34 is provided in the pair of long holes 33 so that both ends thereof are slidably and rotatably inserted. This spindle 34
Both ends of the first leg floor 35 are connected to both ends projecting from the elongated hole 33. That is, the first leg floor portion 35 is rotatably connected to the waist floor portion 32 and slidable along the elongated hole 33. Rollers 36 are rotatably provided on the lower surfaces of both ends of the first leg floor 35. When the first leg floor portion 35 is rotated downward by approximately 90 degrees from the substantially horizontal state, the roller 36 rolls on the lower surface of the waist floor portion 32. As a result, the first leg floor 35 can slide along the elongated hole 33 in a state substantially perpendicular to the waist floor 32 as shown by the chain line in FIG. Further, a second leg floor portion 37 is provided on the separation frame 3 as shown in FIG.

On the lower surface side of the waist floor portion 32, a pair of guide members 38 having a U-shaped cross section are provided along the longitudinal direction of the bed body 1. A first slider 39 shown in FIGS. 6 and 7 is slidably inserted into the guide member 38. This first
The slider 39 includes a pair of rectangular parallelepiped first blocks 41 slidably fitted in the respective guide members 38, and these first blocks 41.
And a plate-shaped second block 42 in which one end side in the longitudinal direction of the block 41 is connected. On one end of the first block 41, a long hole 43 is bored on the other end side along the longitudinal direction, and a first engaging hole 44 opened on the lower surface is formed. Further, a second portion is provided in the central portion of the second block 42.
Engaging holes 45 are formed so as to penetrate in the thickness direction.

A second slider 46 is provided outside the pair of guide members 38.
Is provided slidably. This second slider
As shown in FIG. 8, 46 is formed of an intermediate portion 47 and a pair of side wall portions 48 provided upright on both ends of the intermediate portion 47.
Notches 49 are formed at the front and rear ends of the intermediate portion 47, a third engagement hole 51 is formed in the central portion, and rollers 52 are rotatably provided on the inner surface of the upper portion of the side wall portion 48. It is provided. The second slider 46 is slidably provided in such a manner that the rollers 52 are brought into rolling contact with the upper surfaces of the pair of guide members 38 to surround the outer surfaces of the guide members 38 excluding the upper surfaces thereof.

One end of a first hoisting link 54 forming a hoisting link mechanism 53 is rotatably connected to a tip end of a drive shaft 23 that is axially driven forward and backward by the second drive source 22 by a spindle 54a. There is. The support shaft 54a is installed between the first slider 39 and the pair of first blocks 41.

One end of a second undulating link 55 is pivotally attached to the other end of the first undulating link 54. A pin 56 is projectingly provided on one end side of the second undulating link 55, and the pin 56 is a long hole 43 formed in one of the first blocks 41 of the first slider 39.
Slidably engaged with.

A third undulating link 57 is attached to the other end of the second undulating link 55.
One end of is pivoted. The other end of the third undulating link 57 is pivotally attached to the upper end of one end of the movable frame 25 on the headboard 17 side. Further, an arcuate cam 58 is formed on the other end side of the third undulating link 57. This cam
The roller 61 provided at the other end of the arm 59, which has one end fixed to the middle of the lower surface of the back floor 31, is in contact with the 58. With the back floor 31 lying down almost horizontally,
61 is in contact with the bottom dead center of the cam 58 as shown in FIG. When the drive shaft 23 is driven in the backward direction from that state, the first slider 39 slides along the guide member 38, and the first to third undulating links 54, 55, 57 rotate as shown in FIG. Move. As a result, the roller 61 shifts from the bottom dead center of the cam 58 to the top dead center, so that the back floor 31 is armed.
It is rotated in the standing direction via 59.

On the lower surface of the second slider 46, a first solenoid 62, which is a first stopper mechanism, is provided by a bracket 63 as shown in FIGS. The first solenoid 62 is a rod urged in the upward direction by a spring 64.
Has 65. The rod 65 is fitted into the second engaging hole 45 and the third engaging hole 51 formed in the first slider 39 and the second slider 46 to integrally connect these sliders.
Therefore, when the rod 65 of the first solenoid 62 is projected, the second slider 46 is interlocked with the slide of the first slider 39, and the first solenoid 65 is energized to attach the rod 65 to the spring 64. If you lower it against the power,
The connection state between the slider 39 and the second slider 46 can be released.

One end of a connecting rod 66 is pivotally attached to one end of the second slider 46 in the front-rear direction. The other end of the connecting rod 66 is pivotally attached to a bracket 67 provided midway on the lower surface of the first leg floor 35. Therefore, when the second slider 46 slides together with the first slider 39 from the position shown in FIG. 1 to the position shown in FIG. 2, the first leg floor portion 35 uses the support shaft 34 as a fulcrum to connect the connecting rod 66. After being rotated from a horizontal state to a substantially vertical state by means of, it slides to the lower surface side of the waist floor portion 32 along a long hole 33 formed at one end side of the waist floor portion 32. .

As shown in FIG. 1, a second solenoid 68 as a second stop mechanism is attached by a bracket 69 to the lower surface of one end side of a pair of guide members 38 provided on the lower surface of the waist 32. There is. The second solenoid 68 has a rod 72 which is biased in the upward direction by a spring 71 like the first solenoid 62. The tip of this rod 72 is the 9th
As shown in the figure, it projects from a through hole 73 formed in the guide member 38. When the first slider 39 slides to the position shown in FIG. 2, the rod 72 is pressed by the tip surface of one of the first blocks 41 and elastically displaced downward, and then the lower surface thereof. And engages with the first engaging hole 44 which is opened and opened. As a result, the first slider 39 is held by the guide member 38 so that it cannot slide.

FIG. 11 is a schematic diagram of a control system of the bed apparatus having the above configuration. Reference numeral 81 in the figure is a control unit. A hand operation unit 82 is connected to the control unit 81. The hand operating section 82 is provided with a back raising switch 83, a back lowering switch 84, a chair on switch 85, a chair off switch 86, a standing on switch 87 and a standing off switch 88. Light emitting diodes 83a to 88a are provided above the respective switches. Among the various operations, these light emitting diodes are lit up only at the switches that can be operated at that time. For example, if the light emitting diode 83a of the back raising switch 83 is lit, the back raising operation is started by turning on the back raising switch 83 as described later.

In addition, the control unit 81 includes a first drive source 15, a second drive source 22, a first solenoid 62, and a second solenoid 68, which are controlled devices that are driven and controlled by the control unit 81.
Are connected. A pulse generator 91 is connected to the second drive source 22, and the controller 81 detects the drive amount of the drive shaft 23 by the second drive source 22, which is the rotation speed of the motor.
I am going to give feedback to.

Further, a signal for controlling the controlled device is input to the control unit 81 from various limit switches. As the limit switch, the first one that detects that the separation frame 3 of the bed body 1 is not separated from the fixed frame 2
Limit switch 92 and a second limit switch 93 for detecting that the separation frame 3 is separated from the fixed frame 2 to a predetermined position are provided in the bed body 1 at a position corresponding to, for example, the rack 13. . Also, the second
Third limit switch 94 that detects when the first leg floor portion 35 is driven in the upward direction by a predetermined angle by the drive source 22 of the above, and the back floor portion 31 is also at the predetermined position by the second drive source 22. The fourth to detect that when up to
Limit switches 95 and are provided. The third,
The fourth limit switch 94, 95 is provided to detect the drive amount of the drive shaft 23 driven by the second drive source 22.

FIG. 12 shows an outline of the arrangement state of the controlled device and each limit switch.

In addition, as shown by the chain line in FIG.
A first mattress 96 is held on the upper surfaces of 32 and 32, and second and third mattresses 97, 98 are held on the upper surfaces of the first leg floor portion 35 and the second leg floor portion 37, respectively. .

Next, the operation of the bed apparatus having the above configuration will be described with reference to FIG.
The description will be made with reference to (g). First, when raising the back floor 31 from the state of FIG. 13 (a) to the state of FIG. 13 (b), first, the back raising switch 83 of the hand operation unit 82 is turned on. As a result, the first solenoid 62 is energized and its rod 65 descends, causing the first slider 39 and the second slider
The connection state with the slider 46 of is released. Then, the second drive source 22 operates to drive the drive shaft 23 in the backward direction. The operating direction of the second drive source 22 is the reverse direction. As a result, the first slider 39 is slid toward one end of the guide body 38, and the first to third undulating links are provided.
Since 54, 55 and 57 rotate, the back floor 31 is rotated in the upright direction via the roller 61 that is in rolling contact with the cam 58 of the third up-and-down link 57.

When the first slider 39 slides to a predetermined position and the back floor part 31 is erected up to a predetermined angle, that fact is detected by the fourth limit switch 95, and the second drive source is detected by the detection signal. 22 is stopped. In this state, the rod 72 of the second solenoid 68 engages with the first engaging hole 44 formed in the first block 41 of the first slider 39, so that the slider 39 is held so that it cannot slide. That is, the back floor
31 is held in a standing state so that it cannot rotate.

The drive amount of the drive shaft 23 driven by the second drive source 22 is detected by the pulse generator 91, and the detection signal is stored in the controller 81.

The back floor portion 31 thus erected is shown in FIG. 13 (c).
When the user is to lie down as shown in FIG. When the back-down switch 83 is turned on, the second solenoid 68 is energized to lower the rod 72, and the holding state of the first slider 39 is released. Then, the second drive source 22 operates in the forward direction, which is the direction in which the drive shaft 23 is moved forward, and the first slider 39 is slid toward the other end of the guide body 38. As a result, the first to third undulating links 53, 54, 57 of the undulating link mechanism 53 are rotated in the direction opposite to that at the time of standing, so that the cam 58 of the third undulating link 57 rolls to the top dead center. The contacted roller 61 moves to the bottom dead center.
When the roller 61 moves from the top dead center to the bottom dead center of the cam 58, the back floor 31 rotates with the arm 59 provided with the roller 61 in the fall direction. Then, the controller 81 controls the pulse generator.
The number of pulses generated by 91 is compared with the number of pulses at standing,
When the number of pulses becomes the same, the driving of the second driving source 22 is stopped. That is, the back floor part 31 can be laid down in the same state as the initial state.

When the back floor 31 is stopped midway, the back lowering switch 83 or the back raising switch 84 is pressed. After stopping halfway, the back-raising switch 83 may be turned on to stand up, and the back-lowering switch 4 may be turned on to fall down.

Next, the operation of converting the bed apparatus into a chair will be described with reference to FIGS. 13 (c) to 13 (g). First, when the chair on switch 85 of the hand operation switch 82 is turned on,
The second drive source 22 further operates in the forward direction from the state in which the back floor 31 is lying down horizontally, and drives the drive shaft 23 in the forward direction. As a result, the first to third undulating links 54, 55,
Since 57 rotates to slide the first slider 39 toward the other end of the guide body 38, the second slider 46 integrally connected to the first slider 39 by the first solenoid 62 also slides. To do. When the second slider 46 slides, a connecting rod 66 whose one end is pivotally attached to the second slider 46.
Thus, the first leg part 35 is rotated upward. In this way, when the drive shaft 23 is driven in the forward direction by a predetermined amount, the third limit switch 94 is turned on, so that the second drive source 22 is stopped by the signal.

When the second drive source 22 stops, the first drive source 15 operates to drive the separation frame 3, that is, the second leg floor portion 37 in the direction away from the fixed frame 2. When the second leg floor portion 37 is driven to turn on the first limit switch 92,
The signal stops the first drive source 15.

When the first drive source 15 is stopped, the second drive source 22 operates in the reverse direction. That is, the drive shaft 23 is driven in the backward direction. As a result, the first slider 39 becomes the second slider.
Since it slides along the guide body 38 together with 46, the back floor portion 31 is erected. Further, the second slider 46 slides, so that the first leg floor portion 35 is rotated downward about the support shaft 34 as a fulcrum as shown by the chain line in FIG. It slides along the long hole 33 of the portion 32. This state is shown in FIGS. 13 (e) and 13 (f).

The slide amount S of the first leg floor portion 35 is set to be substantially the same as the thickness dimension of the second mattress 97 held on this upper surface. Thereby, even if the first leg floor portion 35 is folded downward, the second mattress 97 on the upper surface thereof does not protrude from the end portion of the waist floor portion 32.

In this way, when the back floor part 31 stands up to a predetermined angle, that fact is detected by the fourth limit switch 95, and the second drive source 22 is stopped by the detection signal. When the first slider 39 is driven to a predetermined position, the rod 72 of the second solenoid 68 engages with the first engaging hole 44 formed in the first block 41 of the first slider 39 as in the case of raising the back. Since they are fitted together, the back floor part 31 is held non-rotatably.

Therefore, in the bed apparatus, the user sits on the waist floor 32,
It is converted into a chair that can lean on the back floor 31. When converting from a bed to a chair, the first leg floor 35
By being folded, the user can bend the user's leg together with the first leg floor portion 35 from the knee portion. At this time, the second leg floor portion arranged in parallel with the first leg floor portion 35
Since 37 is driven in the direction of separation in advance, even when the tip of the leg is on the second leg floor portion 37 with the user lying on his / her back, when the second leg floor portion 37 is folded, The user's leg does not get caught on the second leg floor portion 37.

That is, the user can take the posture sitting on the chair because the upper half of the body is lifted by the back floor portion 31 and the legs can be bent from the knee portion by the first leg floor portion 35.

In this way, if you want to make a user sitting in this chair stand up in the state converted to a chair, you need to use the standing on switch.
Turn on 87. Then, the second drive source 22 operates in the forward direction with the first slider 39 fixed to the guide member 38, and the drive shaft 23 is driven in the forward direction. Therefore, since the first slider 39 does not slide to operate the up-and-down link mechanism 53, the arrow F in FIG.
The thrust of the drive shaft 23 is applied to the movable frame 25 provided with the waist floor portion 32 via the first slider 39 in the direction indicated by.

The thrust F along the axial direction of the drive shaft 23 can be divided into a force in the ascending direction and a force in the horizontal direction. Therefore, the movable frame
The thrust 25 rises in a front-down state as shown by the chain line in FIG. 2 while swinging the first parallel link 28 and the second parallel link 29 of the parallel link mechanism by the thrust F. This state is referred to as an upright state and is shown in FIG. 13 (g). In this upright state, the pulse generator 91 counts the number of pulses of the second drive source 22 that drives the drive shaft 23, and when the count number reaches a predetermined set value, the second drive source 22 stops.

When the movable frame 25 is driven to the upright state, the user seated on the waist floor portion 32 on the movable frame 25 is urged in the rising direction. Therefore, even a user such as an elderly person or a sick person who has weak legs and waist and who has difficulty standing up immediately from a supine state is urged in a rising direction after being converted into a sitting posture on a chair. You can easily get up.

The standing-off switch 88 is turned on to return the chair in the standing state to the chair in which the waist floor 32 is substantially horizontal. As a result, the second drive source 22 operates in the reverse direction and the drive shaft 23 is driven in the backward direction. Therefore, the movable frame 25
While swinging the first and second parallel links 28, 29 in the direction opposite to the standing direction, the waist floor 32 returns to the horizontal state. The drive amount of the drive shaft 23 at this time is driven by the same number of pulses as the number of pulses at the time of standing.

In order to return the chair thus converted to the bed, the chair off switch 86 of the hand operation unit 82 is turned on. As a result, the second solenoid 68 is first energized to disengage the rod 72 from the first engagement hole 44 of the first slider 39, and then the second drive source 22 operates in the forward direction to drive the drive shaft. 23 is driven in the forward direction. When the drive shaft 23 is driven, the first and second sliders 39 and 46 slide in the drive direction of the drive shaft 23 along the guide body 38, so that the back floor 31 falls down as in the case of lowering the back. To do. In addition, the first rod portion 35 is moved in parallel from the lower surface side to the end portion of the waist floor portion 32 by the connecting rod 66 connected to the second slider 46, and then is rotated until it becomes substantially horizontal. To be

When the back floor portion 31 and the first leg floor portion 35 are driven to predetermined positions, and the fact that this is detected by the third limit switch 94, the second drive source 22 is stopped by the detection signal. . Next, the first drive source 15 is operated, and the separation frame 3 is driven in the direction of approaching the fixed frame 2 until the second limit switch 93 is operated. As a result, the second leg floor portion 37 is juxtaposed with the first leg floor portion 35 and converted into a bed.

Although the first leg floor and the second leg floor are sequentially arranged side by side in the waist floor in the above-described embodiment, the back floor may be provided without the first and second leg floors. By raising the upper part of the user and raising the upper half of the body of the user and then tilting the lumbar bed forward, the user lying on the bed can easily stand up.

Further, in the above-described embodiment, when the bed is converted into the chair, the first leg floor is slightly raised to separate the second leg floor, and is then lowered. If the part is in non-contact or slidable contact with the first leg floor part, the second leg floor part can be separated without rotating the first leg floor part upward. .

[Effects of the Invention] As described above, according to the present invention, the back floor can be erected to raise the user's upper body, and then the waist floor can be tilted forward. Therefore, the user who is lying on the bed can be urged in the rising direction after raising the upper body, and thus the user has weak legs and legs, and it is difficult for the user to stand up when lying on the bed. However, it is possible to start up relatively easily.

Further, according to the present invention, the operation of rotating the back floor portion in the standing direction and the operation of tilting the waist floor portion forward are not continuous, and the slider is provided on the lower surface side of the waist floor portion by the stopper mechanism. By integrally fixing it to the movable frame,
After rotating the back floor part up to a predetermined angle in the standing direction,
The waist floor part can be interlocked with the forward direction. Therefore, since the back floor can be undulated regardless of the waist floor, it is convenient when raising only the back floor and not wanting to rock the waist floor,
Moreover, since the operation can be performed reliably, there are advantages such as excellent safety.

[Brief description of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is a side view of a state before a movable frame is driven, Fig. 2 is a side view of a state in which the movable frame is similarly driven, and Fig. 3 is a plan view of the entire structure. 4 and 5 are side views, FIG. 5 is a perspective view of the bed body, FIG. 6 is a perspective view of a guide member provided with first and second sliders, and FIG. 7 is a perspective view of the first slider. FIG. 8 is a perspective view of the second slider, FIG. 8 is a perspective view of the second slider, and FIG.
FIG. 10 is a cross-sectional view showing a state in which the solenoid is connected to a guide member, FIG. 10 is a cross-sectional view of a bed main body of a portion to which a second drive source is attached, FIG. 11 is a schematic view of a control system, and FIG. Explanatory drawing of arrangement state of control device and limit switch,
13 (a) to (g) are explanatory views of the operating state. 1 ... Bed body, 23 ... Drive shaft, 25 ... Movable frame, 28,29 ... First and second parallel links (parallel link mechanism), 31 ... Back floor, 32 ... Waist floor , 38 ... guide member, 39 ... first slider, 53 ... undulating link mechanism,
68 ... Second solenoid (stopper mechanism).

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-3-139352 (JP, A) JP-A-3-4809 (JP, A) Actual development Sho-48-92210 (JP, U)

Claims (1)

[Claims] 1. A bed main body, a movable frame which is swingably connected to the center of the bed main body in the longitudinal direction by a parallel link mechanism and has a waist floor provided on the upper surface thereof, and is arranged at one end side of the waist floor. A back floor portion provided at one end pivotally attached to the movable frame, a guide member provided on the lower surface side of the waist floor portion along the longitudinal direction of the bed body, and slidably provided on the guide member. A slider, an undulating link mechanism that operates in conjunction with the slide of the slider to undulate the back floor portion with one end as a fulcrum, and a stopper mechanism that holds the slider in a non-sliding state when the back floor portion is upright. , One end of which is pivotally attached to the slider and the other end of which is connected to a drive source, which is driven in the axial direction by the drive source to slide the slider along the guide member. , The slider is operated in a state of being integrally connected to the movable frame by the stopper mechanism, thereby driving the parallel link mechanism to move the movable frame in a direction in which the lumbar floor of the upper surface inclines forward and downward. A bed apparatus comprising a drive shaft for swinging.