JPS6238970B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an actuating device for a folding bed. It is desired to develop a bed that bends and rotates when pushed up, or in which the left and right receiving portions are pushed upward from the left and right center and bends and rotates.

However, when developing such beds, one must be careful that the people sleeping in the beds are seriously ill or bedridden elderly who cannot move on their own. When a person or an elderly person is sleeping, in the unlikely event that the back rest, thigh rest, or leg rest is bent upward due to malfunction, even if the left and right side rests are If one side is pushed upwards and bent, the sleeping person's body will be forced to turn over in a dogleg shape, and will be instantly exposed to a dangerous situation. It happens.

From the above point of view, the object of the present invention is to create an operating device for a refractive bed table that will not cause any of the dangerous situations described above due to malfunction.

In order to achieve the above object, the present invention takes the following technical means.

In other words, even if the left side or right side is small, each side can be pushed upwards and bent, and even if the head side or leg side is small, each side can be pushed upwards and bent separately. Left, right, front, and back refraction. At the lower part of the bed 1 which can be moved up, there are provided a turning mechanism A that pushes up the left and right sides of the bed 1, and a undulating actuating mechanism B that pushes up the front and back sides of the bed 1. Both mechanisms A and B of the undulation operation mechanism B,
When the screw tube 49 is screwed onto a single screw shaft 48 capable of forward and reverse rotation, and the screw tube 49 is located on one side A from the intermediate point P of the screw shaft, both mechanisms A and B The structure of the actuating device for a refracting bed base is such that only one of the actuating mechanisms is interlocked, and conversely, when the screw cylinder 49 is located on the other side, only the other actuating mechanism is interlocked. did.

Next, one embodiment of the present invention will be described in detail based on the drawings.

1 is the bed base, which is divided into 3 rows in the left-right direction and 4 rows in the front-back direction, starting from the front with the center back bed base a.
1. Left back resting stand a2, right back resting stand a3, central lower back resting stand b1, left lower back resting stand b2, right lower back resting stand b3, central thigh resting stand c1, left thigh resting stand c2 , right thigh rest c3, center leg rest d1, left leg rest d
2. Consists of a right leg support base d3, and each of these support bases has adjacent left and right side ends and front and rear side ends arranged by vertical pins 2, 2... and horizontal pins 3, 3... It is pivotally connected.

Reference numerals 4 and 5 denote lateral slip prevention plates, which are attached to the inner lower portions of the left hip resting bed b ₂ and right waist resting rest b ₃ so as to face downward and outward.

Reference numeral 6 denotes a bed frame, which is constructed of C-shaped steel plates so as to have a rectangular shape in plan view, and legs 7, 8, 9, and 10 are attached to the four corners of the bed frame. still,
The legs 7 and 8 in the illustrated example are provided integrally with a handrail portion 11 in the form of a mold. In addition, legs 7, 8,
Casters may be provided at the bottom of 9 and 10.

Reference numerals 12, 13, and 14 are reinforcing horizontal bars that connect the left and right side frame portions of the bed frame 6, and are provided so that the back surface of the bed base 1 can be received therein.

Reference numerals 15 and 16 denote notches, which are provided by recessing the upper surfaces of both the left and right sides of the horizontal bar 14, so that an operating arm for bed bending, which will be described later, can intervene from above.

Reference numeral 17 denotes a frame on which the bending mechanism of the bed 1 is mounted, and includes vertical frames 18 and 19 fixed to the left and right side frames of the bed frame 6, and a predetermined interval between the vertical frames 18 and 19 in front and behind. Connecting horizontal frames 20, 2
It consists of 1.

22 is a motor support plate, which is connected to the horizontal frames 20 and 21;
is connected to.

Reference numeral 23 denotes a metal mounting frame, which connects the lower ends of hanging frames 24 and 25 hanging from the horizontal frames 20 and 21. On both left and right sides of this metal mounting frame 23, bell crank rotation pins, which will be described later, are connected. Holes 26 and 27 are provided for pivoting the lower end. A metal 28 supports the tip of a screw shaft, which will be described later, and is fixed to the upper surface of the metal mounting frame 23 in the left and right center.

An oil pan 29 is provided at the bottom between the motor support plate 22 and the metal mounting frame 23.

Reference numerals 30 and 31 are stopper frames that engage and hold the lateral slip prevention plates 4 and 5 of the bed, and the pair of left and right plates 3
0a, 30b and 31a, 31b as the horizontal frame 2
Lateral slip prevention plates 4 and 5 are fixed to the relative inner wall surfaces of the center portions of the stopper frames 30 and 21 at a predetermined interval so that they can be fitted from above, and the stopper frames 30 and 3
1 face each other in a V-shape in a front cross-sectional view, and the upper sides of the fitting grooves C and D widen laterally and outwardly.

32, 33, 34, and 35 are metals with bearings provided in the front and rear directions, and 36, 37, 38, and 39 are metals with bearings provided in the left and right lateral directions, and each of these metals is attached to the horizontal frame. They are fixed to the wall portions 20 and 21, respectively.

Reference numerals 40 and 41 are metals having bearing portions in the vertical direction, and are disposed directly above the holes 26 and 27 in which the rotation pins of the bell cranks are fixed.
It is fixed to the wall of 1.

Reference numerals 42 and 43 denote lever mounting frames to which shafts of switching levers to be described later are mounted, and are fixed to the front portions of the vertical frames 18 and 19.

A metal member 44 supports the lever shaft, and is fixed to the horizontal frame 20 at an intermediate position between the stopper frames 30 and 31.

Reference numeral 45 denotes a motor whose forward and reverse rotation can be freely selected, and a reducer 46 is integrally assembled on its output shaft.This reducer 46 is fixed to the motor support plate 22, and its output shaft 47 is It protrudes inward from the motor support plate 22.

Reference numeral 48 denotes a threaded shaft, the base of which is fixed to the output shaft 47 of the speed reducer 46, and the tip of the screw shaft 48 is about to be supported by the metal 28.

49 is a threaded cylinder, which is screwed onto the threaded shaft 48.

Reference numeral 50 denotes a control plate on which a switch for controlling the movement of the screw cylinder 49 is attached, and the stopper frame 30, 3
The control plate 50 has a long hole 51 formed along the upper side of the screw shaft 48.

Reference numeral 52 denotes a guide piece that is integrally installed at the upper part of the left and right middle of the screw tube 49, and is inserted into the elongated hole 51 to prevent the screw tube 49 from rotating. ON,
It also serves as an OFF switch actuation piece.

Next, the turning operation mechanism A and the raising and lowering operation mechanism B
These actuating members will be described in detail for one embodiment.

First, to explain the turning mechanism A, 53
is the operation pipe for turning over to the right, and the metal 32, 34
The operating pipe 5 is rotatably supported by a shaft.
3 is the center back bed stand a in the left and right center row of bed stand 1.
1, and actuating arms 54a, 54 that lift the right-side back surfaces of the central thigh rest c1 and the central leg rest d1.
b, 54c, and 54d are fixedly attached.

55 is a left turning operation pipe, which is connected to the metal 3
3 and 35, and the actuating pipe 55 has an actuating arm 56a, which lifts the left side back surfaces of the central back rest a1, the central thigh rest c1, and the central leg rest d1. 56b, 56c, 56d
is fixed.

57 is an operating link mechanism for rotating the left turning operation pipe 55, and the right turning operation pipe 53
Arms 59, 60 and a rod 61 are interposed between the pipe 58, which is rotatably fitted into the pipe 58, and the actuating pipe 55.

Reference numerals 62 and 63 designate rotating arms whose bases are fixed to the right turning actuating pipe 53 and the pipe 58, respectively, and whose tips are positioned downward to rotate the screw shaft 4.
8 is placed between them.

Reference numerals 64 and 65 designate cam plates for turning over; the bottom sides of both cam plates 64 and 65 are integrally connected, and the proximal ends are connected to the screw tube 49 by pins 66 and 67, and the distal ends thereof are movable up and down. The cam plates 64 and 65 are pivotally connected, and the cam plates 64 and 65 have cam holes 6 into which pins 68 and 69 fixed to the tips of the rotating arms 62 and 63 are fitted.
4a and 65a are bored.

The shapes of the cam holes 64a and 65a will be explained as follows.
Both cam holes are elongated holes in the front-rear direction, and from the middle to the base side of the elongated holes, the lower edge of the cam hole 64a is cut out to form a wide hole, and the upper edge of the cam hole 65a is cut out. The holes are wide, and step portions E and F, into which the pins 68 and 69 can be engaged, are formed at the middle of the lower edge and the middle of the upper edge, respectively.

When the threaded cylinder 49 receives rotation of the threaded shaft 48 and moves further to the right (on the side opposite to the motor) from the middle position between the left and right sides of the threaded shaft, the pin 68 or 69 is inserted into the cam holes 64a, 65a. The rotary arms 62, 63 are configured such that only one of the stepped portions is always engaged and the rotary arms 62, 63 can be rotated.

Reference numeral 70 denotes a switching pin, which is integrally fixed to the outer side of the cam plate 64.

Reference numeral 71 denotes a turning operation lever for switching between turning over to the left or turning over to the right, and is constructed by bending the tip side of a shaft 72 supported by the head side frame of the bed frame 6 and the metal 44 upward. A switching actuation plate 74 is attached to the tip of the switching pin 70, which is always urged upward by a coil spring 73, so that the switching pin 70 can be lifted by the switching actuation plate 74.

Reference numeral 75 denotes a positioning frame for the operating lever 71, which is fixed to the head side frame of the bed frame 6 and has a positioning notch 75 for the operating lever 71.
a, 75b are provided, and when the operating lever 71 is set in the notch 75a, the switching operation plate 74 pushes up the switching pin 70 and the pin 68 moves into the cam hole 64.
If the lever 71 is set in the notch 75b, the switching pin 70 will not be pushed up and the cam plates 64 and 65 will rotate downward under their own weight, and the pin 69 will move into the cam hole. It is configured to be locked to the stepped portion of 65a.

Next, the undulation operation mechanism B will be explained.
Reference numeral 76 denotes an operating pipe for operating the backrest, which is fitted into the metals 36 and 37 and supported rotatably.
2, operating arm 76b, 7 that supports the back surface of a3
6c is fixed, and furthermore, this left and right operating arm 76
An actuating arm 7 that supports the back surface of the central backrest a1 is located in the middle of the connecting member 77 that connects b and 76c.
6a is attached. Reference numeral 78 denotes an operating pipe for operating the thigh rests, which is fitted into the metals 38 and 39 and supported rotatably. Operating arms 78b and 78c are attached to support the. Reference numerals 79 and 80 denote leg support arms, which are pivotally connected to the arms 78b and 78c, respectively, so as to be vertically movable by a certain amount, and support the leg support arms d1, d2,
It is provided to support the back surface of d3. The front and rear intermediate portions of the leg support arms 79 and 80 are arranged to intervene in the notches 15 and 16 of the horizontal beam 14 from above, and the notches 1
The upper edges of 5 and 16 also serve as stoppers when lowering.

Reference numerals 81 and 82 are erecting cam plates, which are two independent iron plates superimposed on top and bottom, and are connected to the screw shaft 4.
It is located at the upper part of the right side (the side opposite to the motor) of 8, and the tips on the right side are divided into scissor-like shapes facing outward from each other, and the base side has cam holes 81a and 82a that are long in the direction of the screw shaft 48. is drilled. and,
Both cam holes 81a and 82a have the screw cylinder 49
A pin 83 that is integrally provided upright is fitted into the upper part of the distal end side.

To explain the shape of the cam holes 81a and 82a, both cam holes have the same shape so that they overlap vertically, and a pin 83 attached to the threaded cylinder 49 is attached to one side wall between the front and back, and the pin 83 is attached to the left side, which is the motor side. Engagement recesses T and J that can be engaged during movement are provided.

84 and 85 are bell cranks, bell crank 8
The middle part of 4 is the hole 2 provided in the metal mounting frame 23.
7 and a metal 41, the bell crank 8
5 is a pin 87 that is fixed by the hole 26 and the metal 40
The inner end of the bell crank 84 and the erecting cam plate 81 are pivotally connected by a pin,
The inner end of the bell crank 85 and the erecting cam plate 82 are also pivotally connected with a pin.

Reference numerals 88 and 89 are joints, of which the joint 88 connects the outer end of the bell crank 84 and the arm 90 fixed to the actuating pipe 78, while the joint 89 connects the outer end of the bell crank 85 and the actuating pipe 78. Arm 91 fixed to pipe 76
It connects the

Reference numerals 92 and 93 are springs which connect the horizontal frame 21 integral with the erecting cam plates 81 and 82 and the bed frame 6.
and is biased so that the inner wall surface side where the engagement recesses T and J of the cam holes 81a and 82a formed in the cam plates 81 and 82 are located comes into contact with the pin 83. It is.

Reference numerals 94 and 95 are switching levers fixed to at least one end of two parallel shafts 96 and 97 which are supported at a predetermined interval on the lever mounting frames 42 and 43; A link 98 and a wire 99 are interposed between the shaft 96 and the cam plate 82 for raising and lowering the fulcrum, and a wire 99 is interposed to connect the two. A link 100 and a wire 101 are interposed to interlock and connect. The above is an example of the undulation operation mechanism B.

102, 102, ... are rollers for pushing up the bed, made of hard rubber or synthetic resin,
The operating arms 54a, 54b, 54c, 54
d, 56a, 56b, 56c, 56d, 76a,
It is rotatably supported on each tip of 76b, 76c, 78b, and 78c.

In addition, each of the above-mentioned working pipes 53, 55, and 7
6 and 78 are provided with a rotation regulating stopper between them and the bed frame 6 so that the operating arm fixed thereon does not rotate downward beyond a certain level, and when all the operating pipes are stopped by the stopper, The roller 102 fixed to the tip of each operating arm,
102, . . . are configured so that their heights are approximately the same in the vertical direction.

Reference numerals 103 and 104 denote engaging claws, which are pivotally connected to the horizontal frame 20. The engaging claws 104 are used to prevent both from coming off when the lateral slip prevention plate 5 is fitted to the stopper frame 30. 10
3 and 104 are connected by a rod 105, and the intermediate portion of the rod 105 is connected to the mounting shaft 72 of the turning operation lever via a connecting arm 106.

In addition, 107, 108 are engagement claw insertion holes drilled in the lateral slip prevention plates 4, 5, 109, 110, 111, 1
Reference numeral 12 indicates a hole through which a pawl is inserted into the stopper frames 30 and 31.

Next, the electric control circuit shown in FIG. 15 will be explained.

In the circuit, PB ₁ , PB ₂ , and PB ₃ are push button switches, and in the embodiment, a hand-held switch box 11 is used.
It is installed on 3. , indicates an electromagnetic relay.
Both LS ₁ and LS ₂ are B-type limit switches that are normally closed, and the limit switch LS ₁ is provided between the wires connecting the push button switch PB ₁ and the electromagnetic relay, and the limit switch LS 1 is installed between the wires connecting the push button switch PB ₂ and the electromagnetic relay. A limit switch LS ₂ is installed between the wires.

LS ₃ and LS ₄ are limit switches that have two switch contacts, one of which is normally closed and the other is open. The a-type contact side is inserted in the circuit connecting the pushbutton switch PB ₃ and each relay, R○, and the other b-type contact side is inserted in the circuit between the limit switch LS ₁ and the relay and the limit switch LS ₂ . It's a substitute.

The limit switches LS ₁ and LS ₂ are attached to the left and right ends of the elongated hole 51 formed in the control plate 50, and the limit switches LS ₃ and LS ₄ are attached to the left and right ends of the elongated hole 51, excluding the left and right intermediate portions. A guide piece 52 is provided on the right side and is fixed to the threaded cylinder 49.
is located on the right side (direction B) of the fixed point P between the left and right sides of the elongated hole 51, always press LS ₃ to open the circuit between the push button switch PB ₂ and the relay, while the push button switch PB ₁ and The circuit between the pushbutton switch PB 3 and the relay is closed, and instead the circuit between the pushbutton switch PB ₃ and the relay is opened and the circuit is closed between the pushbutton switch PB 3 and the relay. Further, when the guide piece 52 is located on the left side (in the A direction) of the point P, the LS ₄ is always pushed in so that the circuit opposite to the above can be opened and closed. Furthermore, when the guide piece 52 reaches the left end of the elongated hole 51, the limit switch LS ₂ is pushed in and turned OFF, and the relay circuit is opened from the push button switch PB ₁ .
Conversely, when the right end is reached, the limit switch _LS1 is pushed in and turned off, opening the circuit between the pushbutton switch _PB2 and the relay.

The symbol represents the motor 45, in which the forward rotation side terminal RI and the reverse rotation side terminal NU are connected to the terminal RI with the relay a contact R ₁ and the relay b contact L ₂ , and the relay a contact L ₁ and relay b
It is connected to terminal Nu with contact _R2 .

Incidentally, a case 114 in the figure represents a box for internal circuitry in which an electric control circuit is housed.

Next, the operation of the above example will be explained.

First, place bed 1 on bed frame 6.
, the lateral slip prevention plates 4 and 5 are connected to the stopper frames 30 and 3.
1 and place it so that it fits on the bed base 1.
On top, mats such as sponges 115, futon 116,
A sheet 117 is spread out and a sick person or a bedridden elderly person is made to sleep on it.

In this state, when changing nightgowns, underwear, diapers, etc. or sheets, first turn over to the right by rotating the turning operation lever 71 toward the notch 75a side of the positioning frame 75. The operating plate 74 keeps the pin 70 pushed up. In this state, when the pushbutton switch _PB1 is pressed, the relay is energized, the relay contact _L1 is closed, and the motor 45 rotates in the reverse direction (rotates to the left).

Therefore, the screw shaft 48 rotates to the left and the screw tube 4
9 is transferred to the tip side of the screw shaft, and the guide piece 52 fixed to the screw cylinder 49 is positioned on the side B from point P in FIG. 14, and is further transferred to the tip side of the screw shaft. Ru.

At this time, in the electric circuit, the limit switch LS ₃ is pushed in by the guide piece 52, the contact of the switch LS 3 in the circuit of the push button switch RB ₂ → relay turns OFF, and the contact of the switch LS ₃ in the circuit of the push button switch PB ₃ → The contact of switch LS ₃ turns ON.

Also, the cam plate 64 in the turning mechanism A is pulled toward the tip of the screw shaft by the screw tube 49, and the cam hole 64
The stepped portion E of a engages the pin 68 and rotates the rotating arm 62.
and rotate the right turning pipe 53 in the direction of the arrow R. Therefore, the actuating arms 54a, 54b, 54c, and 54d fixed to the pipe 53 are
6. Rotate upward as shown in Figure 6, center back support stand a1, center thigh support stand c1, and center leg support stand d.
It is possible to turn the patient over to the right by lifting the right back side of the patient.

If the pushbutton switch _PB1 is continued to be pressed, the threaded cylinder 49 moves toward the distal end of the threaded shaft 48, and the guide piece 52 pushes the limit switch _LS1 . Then, the limit switch LS ₁ is turned OFF, the relay is deenergized, and the counterclockwise rotation of the motor 45 is stopped.

Next, to return to the original state of rolling over to the right, it is best to press pushbutton switch PB _3. In this case, the relay is energized, so relay contact R ₁ turns on and R ₂ turns on.
OFF, and the rotation of the motor 45 is rotated to the right, which is normal rotation. Therefore, since the screw shaft 48 rotates clockwise, the screw tube 49 moves toward the base of the screw shaft, and due to the load, the right turning pipe 53 slowly rotates in the direction opposite to the direction of the arrow, and the bed is rotated to the right. The table 1 is returned to a horizontal state. The guide piece 52 is connected to the elongated hole 5.
1, and the guide piece 52 stops pushing the limit switch _LS3 .

Next, when you want to turn over to the left, switch the operating lever 71 to the notch 75b side of the positioning frame 75, and the pin 7
The state shown in FIG. 10 is reached when the push-up of 0 is stopped. Then, the cam hole 64a is disengaged from the stepped portion E, and conversely, the pin 69 of the rotating arm 63 can be engaged with the stepped portion of the cam hole 65a.

In this state, when pushbutton switch PB ₁ is pressed again, the relay is energized and the relay contacts are activated as before.
Turn on L ₁ and motor 45 rotates in reverse (left rotation)
Then, the threaded cylinder 49 is moved by the threaded shaft 48 toward the tip side of the threaded shaft.

Therefore, the stepped portion engages and pulls the pin 69, and the rotating arm 63, pipe 58, arm 60,
The left turning pipe 55 is rotated in the direction of the arrow via the rod 61 and arm 59. Therefore, the actuating arms 56a, 56b fixed to the pipe 55,
56c and 56d are rotated upward, and the central back rest a1, the central thigh rest c1, and the central leg rest d
It is possible to turn the patient over to the left by lifting the left side back surface of the patient.

Next, in order to return to the original state of rolling over to the left, it is preferable to press the push button switch _PB3 in the same manner as described above.

As described above, the turning operation mechanism A always moves the screw tube 4 toward the distal end side of the screw shaft 48 from the middle part (fixed point P).
It will be activated only when 9 is in position.

Next, the operation of the undulation operation mechanism B will be explained. First, when it is desired to raise the upper body, only the switching lever 95 is rotated in the direction of the arrow W in FIG. Then, the cam plate 81 is pulled against the spring 92 via the link 100 and the wire 101, and is rotated around the pivot point with the bell crank 84, causing the engagement between the pin 83 of the threaded cylinder 49 and the cam hole 81a. The engagement with the mating recess is released.

In this state, the pushbutton switch PB ₂ is pressed to excite the relay, turning on the relay contact R ₁ and causing the motor 45 to rotate forward (clockwise).

Then, due to the forward rotation of the screw shaft 48, the screw tube 4
9 is transferred to the base end side of the screw shaft, the guide piece 52 is positioned on the A side from point P in FIG. 14, and is further transferred to the base end side of the screw shaft.

At this time, in the electric circuit, the limit switch LS ₄ is pushed in by the guide piece 52, the contact of the switch LS ₄ in the circuit of the push button switch PB ₁ → relay is turned OFF, and instead, the push button switch PB ₃ →
The contact of switch LS ₄ in the relay circuit turns ON.

Then, as the threaded cylinder 49 is transferred to the base end side of the screw shaft, the pin 83 fixed to the threaded cylinder 49 engages the engagement recess provided in the wall surface of the cam hole 82a of the cam plate 82 and pulls the screw cylinder 49. , the bell crank 8 with the cam plate 82
5 around the pin 87 in the direction of the arrow mark. Therefore, the operating pipe 76 is connected from the bell crank 85 via the joint 89 and the arm 91.
Rotate in the direction of the arrow y. Therefore, the operating arms 76b, 76c, and 76a rotate upward, and the backrests a2, a3, and a1 are rotated upward, thereby making it possible to raise the upper body of the sleeping person.

Next, to restore the original state, press pushbutton switch PB ₃ , which will energize the relay and close the relay contacts.
When _L1 is turned ON, the motor 45 can be rotated in the reverse direction (rotated to the left), and the backrest portion of the bed 1 is rotated downward under the load and returned to its original position.

Further, if it is desired to have only the foot side swung upward, the switching lever 95 is returned to its original position, and then another switching lever 94 is rotated in the direction of the arrow T. Then, this time, the cam hole 81 of the cam plate 81
Only the engagement recess formed in the wall of a engages with the pin 83. In this state, when push button switch PB ₂ is pushed in as before, the motor 45 rotates clockwise and the cam plate 81 moves into the threaded cylinder 49. The bell crank 84 is rotated in the direction of the arrow D as shown in FIGS. 10 and 13. Therefore, the operating pipe 78 is rotated from the bell crank 84 through the joint 88 and the arm 90 in the direction of the arrow X.

Therefore, the operating arms 78b, 78c and the leg rest support arms 79, 80 connected thereto are rotated upward, and these arms support the left and right thigh rests c2, c3 of the bed 1 and the leg rests. Bed stand d1,
d2 and d3 are thrown upward, and the feet of the sleeping person are thrown upward.

Next, to restore this state to its original state, press the pushbutton switch PB _3. At this time, the relay is energized and the relay contact L ₁ is turned ON, and the motor 45 rotates counterclockwise, rotating the bed 1. The thigh rest and leg rest are returned to their original state.

Furthermore, if you want to raise your upper body and swing up your feet at the same time, you can leave the switching levers 94, 95 in the state shown in FIG. 10 without tilting them, and perform the same operation as described above. In this case, the relationship between the cam plates 81, 82 and the pin 83 is as shown in FIG.

In addition, when the undulating actuating mechanism B is not operated, the switching levers 94 and 95 can be pushed down and the pin 8
3 and the cam plates 81, 82 are in the state shown in FIG. 12, and the operating mechanism B does not work at all.

As described above, the undulating actuation mechanism B always places the threaded cylinder 4 closer to the proximal end than the intermediate part (fixed point P) of the threaded shaft 48.
It will be activated only when 9 is in position.

In addition to the above embodiments, the following embodiments may be considered.

That is, although the undulating actuating mechanism B is operated on the base end side of the screw shaft 48 and the turning actuating mechanism A is operated on the distal end side, it is also possible to transfer these and operate each mechanism A and B with a reverse screw. In addition, the motor 45 of the embodiment may not be placed on one side of the bed, but may be placed on the rear side of the bed, on the side of the leg holder. In this case, the position of the motor 45 in FIG. However, when doing this,
Generally, the turning mechanism A and the undulating mechanism B have the following configurations.

That is, the structure of the mounting frame of the operating mechanism shown in FIGS. 8 and 9 of the above embodiment becomes the structure shown in the oblique view shown in FIG. The bearing portions of the rotation pins 84 and 87 of the bell cranks 84 and 85 are attached to the frame body 118 that connects the horizontal frames 20 and 21.
a, 118b.

As shown in FIG. 18, a turning cam plate 119 is provided in which the bell cranks 84a and 85a are provided by deforming the operating pipes 53 and 55 of the turning operation mechanism A and the turning cam plates 64 and 65 into a planar shape.
The turning cam plate 119 is pivotally connected to a pin 83 standing on the top end side of the threaded cylinder 49, and the cam hole 119a is formed in a substantially ladle shape and is connected to the bell crank 84a. , 85a are selectively engaged with the left and right wall engaging stepped portions H' and H' of the cam hole 119a. Of course, the cam plate 119 is configured to be able to rotate to either the right or the left around the pin 83 using a suitable turning operation lever.

In addition, the actuation pipe 76 of the undulating actuation mechanism B is
An arm 121, a rod 122, and an arm 123 are interlocked and connected to a pipe 120 that fits into the operating pipe 78, and the operating pipe 78 and the pipe 1
An independent cam plate 1 in which pins 126 and 127 fixed to rotating arms 124 and 125 fixed to 20 are pivoted on both left and right sides of a threaded cylinder 49 so as to be movable up and down.
28, 129 cam holes 128a, 129a, respectively
It is fitted inside. And the cam plate 12
Cam holes 128a and 129a formed in the long holes 128a and 129a are formed long in the front-rear direction, and engaging step portions T and T for engaging the pins 126 and 127 are formed on the front and rear intermediate upper surfaces of the elongated holes. The cam plates 128, 129 are configured so that they can each be rotated upwardly by appropriate operating levers for raising and lowering, so that the pins 126, 127 can be appropriately engaged with the engaging step portions T and J.

In addition to the above-mentioned embodiments, the following structures for the refraction structure of the bed table 1 can be considered. That is, the 19th
As shown in FIG. 20 and FIG. 21, the respective receiving beds may be connected by a connecting rubber body 130. In this case, a hole 131 is provided in the side plate surface of each bed platform, the protrusion 130a of the connecting rubber body 130 is inserted into the hole 131, and a constriction 130b formed at the base of the protrusion fits into the hole 131, or As shown in FIG. 22, a connecting rubber body 13 is attached to the side plate surface of each bed stand
In addition, as shown in FIG. 23, a pair of flanged bolts 134 and 135 are connected with a rubber body, and thereby The structure may be such that the respective receiving beds are connected.

It goes without saying that the bed 1 may be made of a single plate-shaped synthetic resin body whose bent portion is formed into a thin hinge.

Further, in the embodiment, the switching levers 94, 95
are prepared separately, but these are made into a single switching lever 136, for example, when the upper body is laid down to the right side, the upper body can be raised up, when it is laid down to the left side, the foot side can be raised, and when it is not laid down in either direction, the upper body can be raised. It is also possible to configure the device so that both the upper body is raised and the feet are raised by using the configuration shown in FIG. 24.

In addition, if a timer device 137 with a timer switch mechanism is provided and the contacts of each push button switch are turned on at predetermined time intervals, it can be used by a bedridden elderly person without the need for a nurse. The bed can also be extremely comfortable without causing any slippage.

Furthermore, if a signal device 138 is provided and the switch is turned on after a signal such as the sound of a music box is emitted when pushing the pushbutton switches PB ₁ to _{PB 3} , a sleeping person can receive a shock. You can do it without giving.

As described above, since the present invention has the above-mentioned structure, the bed table which can be bent left and right and front and back can be freely selected and rotated in a predetermined part by forward and reverse rotation of a single screw shaft, and the patient can Although it can accurately care for the elderly who are bedridden or bedridden, the turning mechanism and the raising and lowering mechanism are performed by screw tubes that can be used separately on the proximal end and distal end of the screw shaft. It has a unique effect in that the operating mechanisms never operate at the same time, and there is no need to worry about putting a sick person or a bedridden elderly person in an unreasonable position due to a malfunction.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention. Figure 1 is a slope view showing the entire bed, Figures 2 and 3 are slope views showing the movement of the bed base, and Figure 4 is a slope view showing the bed as a whole. Fig. 5 is a front view of the main part with a partial cross section, Fig. 6 is a simplified plan view of the main part, and Fig. 7 is the same as Fig. 6. 8 is a side sectional view of the main part, Fig. 9 is a plan view of the main part, and Fig. 8 is a side sectional view of the main part.
10 is a perspective view of the main parts showing the operating mechanism, Figs. 11 to 13 are explanatory diagrams of the main parts of the operating mechanism, and Fig. 14 is the main part for explaining the action. A simplified plan view, FIG. 15 is an electric circuit diagram, FIG. 16 is a simplified rear view showing the operating state, FIG. 17 is a slope view of the main part of another example, and FIG. 18 is a slope view of the main part of another example. FIGS. 19 to 23 are views showing other examples of the bending connection structure of the bed base, and FIG. 24 is a perspective view showing another example of the operating mechanism. Symbols in the figure, A... Actuation mechanism for turning over, B... Actuation mechanism for raising and lowering, 1... Bed base, 48... Screw shaft, 49...
Threaded tube, P...Middle point of the screw shaft.

Claims (1)

[Claims] 1 Even if the left side or right side is small, each side can be pushed upwards and bent separately, and even if the head side or leg side is small, each side can be pushed upwards and bent separately. At the bottom of the movable bed, there is provided a turning mechanism that pushes up the left and right sides of the bed, and an undulation mechanism that pushes up the front and back sides of the bed. When both mechanisms are screwed together on a single screw shaft capable of forward and reverse rotation, and the screw cylinder is located on one side from the intermediate point of the screw shaft, one of the two mechanisms An actuating device for a refracting bed base, in which only one actuating mechanism is interlocked, and conversely, when a screw cylinder is located on the other side, only the other actuating mechanism is interlocked.