JPS6329643A - Vibration type bed - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rocking bed, and particularly to a rocking bed suitable for use as a hospital bed.

[Conventional technology]

Traditionally, patients with severe illness or who have had long-term restriction of physical movement (patients with paralysis who have sustained an injury, patients with multiple sclerosis).

People who have broken their backs and patients who are unable to make voluntary movements or who are seriously injured patients who need to be restrained from moving, including involuntary convulsive movements, can suffer from various symptoms due to their inability to move while lying in hospital beds. Complications (sock pneumonia, atelectasis, thrombophlebitis, ff1i embolism, urinary stones.

Urinary tract infections, mm, orithioporosis, muscle wasting.

Ectopic bone formation (9) is known to cause constipation, fecal impaction, and orthostatic hypotension), and rocking hospital beds have been proposed to prevent such complications.

As a swinging hospital bed, the
There is one described in Publication No. 79, and this conventional swinging hospital bed consists of a U-shaped pedestal with pillars erected at both ends, and a stretcher section pivotably supported on both branches. It is composed of a face bone member and a swinging mechanism for swinging the bone member into the U-shape with a stretcher section.

[Problem that the invention seeks to solve]

With such a conventional rocking bed, the rocking speed is 8! In order to reduce the output of the drive device as much as possible, the distance between the swinging part of the U-shaped bone member with the stretcher and the center of gravity of the patient and the center of rotation is made small. If the weight is heavier than the weight of the bow, the center of gravity will move upwards, so a weight corresponding to the amount of movement of the center of gravity will be
It is placed on the horizontal part of the keel-shaped keel for balance.

However, in such conventional rocking beds, the center of gravity adjustment means simply places a weight on the horizontal part of the U-shaped air frame member, so there is a problem that fine adjustment of the center of gravity is difficult. However, removing the weight is complicated.

The present invention aims to solve these problems, and aims to provide a rocking bed that allows fine adjustment of the center of gravity to be easily and quickly performed.

[Means for solving problems]

For this reason, the rocking bed of the present invention includes a pedestal frame having pillars erected at both ends thereof, a stretcher part pivotably supported by the pillars, and a stretcher part protrudingly fixed to the stretcher part. A bearing interposed between a support shaft and the support column, and a swinging mechanism for swinging the stretcher section through the support shaft.
Center of Gravity Adjustment 8! Grooves are provided and the center of gravity is 5! The I-setting machine has male threaded rods hanging down from both lower sides of the stretcher section, and a female threaded portion screwed onto the open fiber threaded rods, so that it can be adjusted up and down. It is characterized by being configured with a weight that is

[For production]

In the rocking bed of the present invention described above, by rotating the weight of the center of gravity adjustment rock 61 with the patient lying on the stretcher, the weight is adjusted up and down along the male threaded rod, and the rocking stretcher part Adjust the position of the center of gravity of the entire rocking body including the body and the patient.

〔Example〕

Hereinafter, embodiments of the present invention will be explained with reference to the drawings.
1 to 5 show a rocking bed as a first embodiment of the present invention, in which FIG. 1 is a front view thereof, FIG. 2 is a perspective view thereof, and FIG. 3 is a side view of essential parts thereof. Fig. m4 is a schematic diagram showing the hydraulic swing mechanism, Fig. 5 is a 70-chart for explaining its operation, and Figs. FIG. 6 is a schematic diagram showing the hydraulic swing mechanism, FIG. 7 is a 70-chart for explaining its operation, and FIG. 8 is a diagram of the present invention! ¥'! FIG. 7 is a side view of a main part showing a rocking bed as a third embodiment.

As shown in FIGS. 1 to 3, the swinging bend of this embodiment includes a movable frame 1, a stretcher section 2 with fences, and a support shaft 3 attached to the stretcher section 2 with fences. The entire rocking body includes a bearing 4 for pivotally supporting the support shaft 3 on the movable frame 1, a hydraulic rocking mechanism 5 for rocking the stirred stretcher part 2, the stretcher part 2 with a lever, and the patient. Center of gravity adjustment that can adjust the center of gravity? fi
vt6 is provided.

This movable frame 1 is composed of a lower frame 10, casters 11 attached to the lower frame 10, and columns 12 and 12 erected at the center of both ends of the lower frame 10.

The stretcher section 2 with a fence includes an H-shaped aggregate 13 swingably supported by the pillars 12 of the movable frame 1, a floor plate member 14 attached to the second H-shaped aggregate 13, and a floor plate member 14. A mat 15 is placed on the mat 15, and a pair of left and right seed members 16 are slidably disposed in the dovetail grooves 13c of the FI aggregate 13. IG, and the seed member 16 is attached to the seed member (bud member) 1.
A support portion 18 for supporting the support portion 7 is provided.

Furthermore, as shown in FIGS. 3 and 4, the support shafts 3. The trained stretcher part 2 is pivotally supported by the movable frame 1 through a bearing 41 that can pivotally support the stretcher n2, and this seeded stretcher n2 is swingably attached to the movable frame 1 by a driftwood pressure type swing mechanism 5. And this fluid pressure type rocking 8! The purchase 5 includes a r-shaped drive device (
a balanced type rotary actuator) 19 and a working fluid supply system 20 for supplying working fluid to this drive device 19
and a swing control system 21 for controlling the working fluid supply system 20.

As shown in FIG. 4, the drive device 19 includes a blade 22 which is fixedly protruding from the support shaft 3, and which rotates the blade 22 at a required angle ±ψ(
Here, it is configured to include a casing 24 in which a pair of fan-shaped fluid pressure chambers 23, 23 for rotational driving in a range of about 120 degrees are defined.

Further, as shown in FIG. 4, the working fluid supply system 20 is connected to supply working fluid (oil) to one drive device in the hydraulic rocking 8+1 structure 5. is composed of a working fluid pump 27 and working fluid supply pipes 28a and 28b that connect the working fluid pump 27 and the drive device 19, and the working fluid pump 27 is made of a non-magnetic material. The fluid pressure sill 25 and the magnetic material fitted inside the fluid pressure sill 25! ! ! It is composed of a free piston 26 and electromagnetic filters 27a and 27b respectively attached to both ends 25a and 25b of the hydraulic sill 25 to drive the seven-lead piston 26.

The working fluid supply pipes 28a, 28b connect both wall surfaces 25c, 25d of the fluid pressure sill 25 and both ends 23a, 23b of the fan-shaped fluid royal 23, 23 of the drive device 19, respectively. A variable orifice 29 is inserted into the working fluid supply pipe 28a.
An oil cooler 30 as a working fluid cooler is inserted in b.

These variable orifice 29 and oil cooler 230 constitute a working fluid supply system 20, and the total amount of oil discharged from the 7-lead piston 26 in this working fluid supply system 20 is equal to the total volume of the fan-shaped fluid pressure chamber 23. is set larger than .

Further, the swing control system 21 includes an electromagnetic coil 27a.

The control device 31 outputs control signals to the electromagnetic coils 27a, 27b and the variable orifice 29, and the control device 31 outputs control signals to the electromagnetic coils 27a, 27b and the variable orifice 29. A power switch 32 that sends an operating signal for the pressure type swing mechanism 5, a manual switch 33 as a setting device that sends a swing cycle setting signal and a swing angle setting signal to the control device 31, and a rotation angle of the support shaft 3 or the blade 22. a rotary position sensor 34 that detects the rotation angle of the fan-shaped fluid pressure chamber 23. g
! The clock 3G outputs a clock signal to the J device 31.

The control device 31 includes a fan computer equipped with a memory and a CPU, and receives the swing angle setting signal from the manual switch 33 and the actual angle signal from the rotary motion sensor 34 so that the difference is zero. A first circuit that outputs a first off V signal when it detects that the
a second control section 31b that receives detection signals from the limit switches 35a and 35b and outputs a second switching signal, and first and second control sections 31a and 31b.
A swing angle mode switching control section 31c that receives a switching signal from at least one of the two and sends a switching control signal for switching the power supply to the electromagnetic coils 27a and 27b, and the same swing!
! ! The switching control signal from the l+angle motor remote switching control section 31c, the clock signal from the clock 36, and the manual switch 3
The variable orifice 2 receives the oscillation period setting signal from 3.
Oscillation period control section 31t that sends an orifice amount control signal to
It is composed of J.

In addition, as shown in Figure ttS1, the center of gravity adjustment mechanism 6 includes two pairs of male screw frames 42 that protrude downward from both lower surfaces 14a of the floor plate member 14 of the stretcher section 2 with fences, and these male screw frames n4.
A cylindrical weight 43 having a female threaded part 43a in its central hole to be screwed together with a cylindrical weight 43 and cylindrical weights 43 and 43 disposed on both sides are mutually interlocked. It is composed of a weight interlocking device 44 for adjusting the vertical movement.

The weight interlocking device 44 includes a boo '744a attached to each weight 43 and a pair of left and right pulleys 44a, 44.
al: Consists of a suspended wire or chain 44b. Also, the front and rear pulleys 44a, 44a are connected together.
! A wire or chain may also be provided.

Note that the reference numeral 13b in the figure indicates the horizontal member 4 of the H-shaped aggregate 13.
5 indicates 707, *1 to each other, *2 to each other, ×
3 and *4 indicate that they are in a state of communication or connection with each other, and in FIGS. 1 to 3, illustration of the working fluid supplies W28a and 28b is omitted.

Since the rocking bed according to the first embodiment of the present invention is constructed as described above, first, the stretcher section 2 with rails is fixed in a horizontal state using a locking mechanism for preventing rocking (not shown).
After a critically ill patient is placed face up on a mat 15, a cushion (pad member) 1 is placed to hold the patient's chest.
7.17 is inserted between the patient's chest and the support section 8.

At this time, the ends of the cushions (pad members) 17.17 are fixed to the support portion 18 with fasteners (manok tape) or the like.

Then, the patient is secured to the stretcher section 2 with a strap using a band or the like (not shown).

In this state where the patient is secured to the stretcher section 2 with rails, the center of gravity is adjusted by using the center of gravity y4 adjustment fiv1G.

First, depending on the patient's physique and weight, the center of gravity of the entire swinging member is moved to a position commensurate with the patient's weight in order to prevent it from moving upward or downward from the standard center of gravity for a standard body m patient. The weight 43 is moved up and down.

At this time, when the weight 43 on one side is rotated and moved up and down, the weight 43 on the other side is also moved up and down via the weight interlocking device 44 .

In this way, by bringing the center of gravity of the entire oscillating body closer to or aligning it with the oscillating center, the driving device r1119
and the driving force of the working fluid supply system 20.

Pump capacity can be reduced.

And like this, the center of gravity is m! In this state, when the power switch 32 is turned on, as shown in the 0'SS diagram, first, in block A1, the rotation direction 7 lag F is set to zero (counterclockwise as shown in the t54 diagram) for initialization. (step al), then set the oscillation cycle setting value (target cycle) using the manual switch 33.
To and swing angle setting value (target rotation angle) ψ. [Here, the swing angle setting value ψ. is set to the maximum swing angle ψ. ] and read the current time T from the clock 36 (step a2), and the current time T is the first
(step a3).

Then, the rotational direction 7 lag F is determined as tII (step a
4) If F=0 (counterclockwise), in block A2, the electromagnetic coil 2
7a is turned on, the electromagnetic filter 27b is turned off, and the blades 22 of the drive device 19 are rotated in the normal rotation direction (step a5).

Further, the actual rotation angle θ of the blade 22 is read from the rotary position sensor 34 (step a6), and the actual rotation angle θ is
is the target rotation angle ψ. The blade 22 is rotated in the normal rotation direction until the above condition is reached (step a7) or the minotosinch 35a is turned on (step a8).

And step a7. In a8, θ≧ψ. Alternatively, when the ON state of the limit switch 35a is detected, the rotation direction 7 lug F is set to 1 (clockwise as shown in FIG. 4) (step a9).

In addition, the rotation direction 7 lag Ft-N is determined (step a4)
, if F=1 (clockwise), in block A3, clockwise rocking is performed (, the electromagnetic filter 27+o is turned on, the electromagnetic filter 27a is turned off, and the blades 22 of the drive device 19 are turned on). is rotated in the reverse direction (step alo).

Further, the actual rotation angle θ of the blade 22 is read from the rotary position sensor 34 (step a11), and the actual rotation angle θ is equal to the target rotation angle −ψ. Is the following (step a12
) or whether the mint switch 35b is in the on state (
The blade 22 is rotated in the normal rotation direction until step a13).

Then, step a12. In a13, θ≦−ψ.

Alternatively, when the ON state of the limit switch 35b is detected, the rotation direction 7 lag F is set to 0 (counterclockwise as shown in Figure PtS4) (step a14).

In this way, Bron, Ri A2. After the counterclockwise and clockwise rotations are performed in A3, the target rotation angle is set in block A4. (Here, maximum deflection angle position)
The swinging is temporarily stopped at (step a15), the currently excited electromagnetic filter 27a (27b) is maintained in the on state, and the blade 22 of the drive device 19 is stopped (step a15).

Next, in block A5, the current time T is read from the clock 36 in order to adjust the swing period (step a
16), change the current time memory value Tn to the previous stop time T
n −+, and the current time T is stored as the current stop time Tn (step a17).

Then, the current stop time Tn and the previous stop time Tn,
Take the difference (Tn-Tn-,) (step a18),
The actual period Tv [= 2 (Tn-Tn-1
)] and the target period T0 are compared in step a19), and if the difference (Tw-T, ) is less than a predetermined value (1 (-ε)), the opening degree of the variable orifice 29 is reduced by a predetermined amount in step a20.
), the swinging speed is adjusted to decrease so that the actual period Tw becomes the target period T0.

Moreover, if the difference (Tw-T,) is larger than the predetermined value ε,
The opening degree of the variable orifice 29 is increased by a predetermined amount (step a21), and the swinging speed is increased so that the actual period Tw becomes the target period T0! If the absolute value of the difference (TW To) falls within the predetermined value ε, the opening degree of the variable orifice 29 is not adjusted.

Then, in steps a19 to a21, after adjusting the variable orifice 29 by 7 degrees, the process returns and in the next process 70-, the processes of blocks A2 to A5 described above are executed again.

At this time, if block A2 was processed in the previous processing flow, the rotational direction 7 lag F is changed from zero to 1 at step a9, so in the next processing flow, block A3 is processed. In other words, the processing flow is performed in the order of blocks rA2 → A4 → A5J, and the processing flow is performed in the order of blocks rA2 → A4 → A5J.
→Processing 70- performed in the order of A5J is performed alternately.

As a result, with the patient fixed on the stretcher section 2,
It can swing at a predetermined period T0 and a predetermined swing angle r0. This swinging state of the horizontal stretcher section 2 is shown in 2 in FIG.
Indicated by a dashed dotted line.

Further, a working fluid pump 27 in the working fluid supply system 20 is disposed below the fenced stretcher section 2, and further comprises a Schilling type pump equipped with a free piston 26 made of magnetic material. Therefore, the operating noise is extremely low and does not transmit easily, making it suitable for use in nursing seriously ill patients.

In addition, the seed member 16 is attached to the dovetail groove portion 13 of the vertical member 13n of the I-type aggregate 13, as shown by the two-dot chain line in the right half of FIG.
It is designed to be able to move up and down along the direction c, thereby making it easier to move the patient to the bed.

The rocking bed as the second embodiment of the present invention has the sixth and seventh
As shown in the figure, the working fluid supply system 20' and the swing control system 2
1 degree is different from the first embodiment, and in FIGS. 6 and 7, the same reference numerals as in the first embodiment shown in FIGS. 1 to 5 indicate substantially the same things.

The working fluid supply system 20'' includes an oil tank 37, an electric motor 38, a working fluid pump 39 that receives rotational driving force from the electric motor 38 and pressure-feeds the working oil from the oil tank 37, and an oil tank 37. and the discharge port 39a of the pump 39 and both ends 23a of the fluid pressure chamber 23.23.
, 23b, respectively connected to the working fluid supply "e28"
a, 28a', 28b.

28b'' and their working fluid supply Ir! 28a, 28
a'.

28b, 28b' and a three-way switching valve 40 inserted therein.

And, this three-way switching valve 40 is in the form of communication for forward rotation! ! A,
The electromagnetic coil 40 is configured to operate in three states: a communication state gB for reversal and a cutoff state C for stopping.
The communication state for forward rotation is achieved by the energized state of a and the non-energized state of the electromagnetic coil 40b! ! At A, pump 39
The oil discharged from the working fluid supply pipe 28a passes through the working fluid supply pipe 28a to the RA section 23b of the fan-shaped fluid pressure chamber 23.
connected to be supplied to the fan-shaped fluid pressure chamber 23
The oil discharged from the end 23a is connected to the oil tank 37 through the working fluid supply pipe 285' from the working fluid supply pipe 28b.

In addition, the three-way switching valve 40 operates in a reverse communication state B achieved by the electromagnetic coil 40b being energized and the electromagnetic coil 40a being de-energized. Fluid supply pipe 28b
The oil is connected to the end 23a of the sector-shaped fluid pressure chamber 23 through the working fluid supply pipe 28a and the oil discharged from the end 23b of the sector-shaped fluid pressure chamber 23 is supplied to the end 23a of the sector-shaped fluid pressure chamber 23 through the working fluid supply pipe 28b. It is connected to be supplied to tank 37.

Furthermore, the three-way cut 8 well 40 is an electromagnetic coil 40a.

The three pumps, the oil tank 37, and the sector-shaped fluid pressure chambers 23, 23 are configured to be in a shut-off state in a stop cut-off state C achieved by a return spring (not shown) when the pump 405 is in a non-energized state.

A pressure valve 41 is inserted into the working fluid supply pipe 28a' and is in a communication state when the discharge pressure from the pump 39 exceeds a predetermined pressure, and is in a cutoff state otherwise.

Further, the swing control 121' alternately switches the supply of power to the electromagnetic coils 40a and 40b of the three-way switching valve 40 at a required time interval (for example, 2 minutes).
a, 40b and two variable orifices, a power switch 32 that sends an operating signal for the hydraulic rocking fS Iso h1S to the control device 31, and a power switch 32 that sends a rocking period setting signal and A manual switch 33 as a setting device that sends a swing angle setting signal;
A rotary bobbin sensor 34 that detects the rotation angle of the support shaft 3 or the rotation angle of the blade 22, and each wall surface 2 of both parts 23a, 231 of the fan-shaped fluid pressure chambers 23, 23 of the blade 22.
3c.

Detects the contact state to 23cl or Mituto Inch 35
a, 35b, and a clock 36 that outputs a clock signal to the control device 31.

Since the rocking bed according to the second embodiment of the present invention is constructed as described above, after the patient is secured and the center of gravity is adjusted in the same way as in the first embodiment, the power switch 3
When turned on, as shown in Figure 7 (first,
In block Bit 2, in order to initialize, set the rotation direction 7 lag F to zero (counterclockwise as shown in figure ffS6) (step bi), and then set the oscillation period setting value (target period) To and the manual switch 33. Swing angle setting value (target rotation angle) ψ0 [here, swing angle setting value ψ. is set to the maximum swing angle ψ. 1 and the current time T from the clock 36 (step b2), and the current time T is set to the value Tn stored in the memory of ':jS1 (step b3).

Then, determine the rotation direction 7 lag F (step b4)
, if F=O (counterclockwise), the electromagnetic filter 40a is rotated in order to swing counterclockwise in the prop 2B2.
is turned on, and further the electromagnetic filter 40b is turned off, and the three-way switching valve 40 is placed in the normal energized state.
] The blades 22 of the device 19 are rotated in the normal rotation direction (step b5).

Further, the actual rotation angle θ of the blade 22 is read from the rotary motion sensor 34 (step b6), and the actual rotation angle θ is
is the target rotation angle ψ. The blade 22 is rotated in the normal rotation direction until the above occurs (step b7) or the limit switch 35a is turned on (step bs).

And step b7. In b8, θ≧ψ. Alternatively, when the ON state of the limit switch 35a is detected, the rotation direction 7 lug F is set to 1 (clockwise as shown in FIG. 6) (step b9).

Also, determine the rotation direction 7 lag F (step a4),
If F=1 (clockwise r), then B07B3.

In order to perform clockwise oscillation, the electromagnetic coil 4
0b is turned on, the electromagnetic filter 40a is turned off, the three-way switching valve 40 is placed in the reverse energization state B, and the drive device f! The blade 22 of No. 19 is rotated in the reverse direction (step b10).

Further, the actual rotation angle θ of the blade 22 is read from the rotary motion sensor 34 (step b11), and the actual rotation angle θ is the target rotation angle −ψ. Is the following (step b12
) or the limit switch 35b is turned on (
The blade 22 is rotated in the normal rotation direction until step b13).

Then, step b12. In b13, θ≦−ψ.

Or, when the on state of the limit switch 35b is detected, the four direction 7 lugs F are turned to O (counterclockwise as shown in Fig. 6).
(step b14).

In this way, block B2. After performing counterclockwise and clockwise rotation in E33, the target rotation angle ψ is determined in block B4. (Here, the maximum runout is within r!
In order to temporarily stop the rocking in step 1), both the currently excited electromagnetic filters 40a and 40b are turned off, the three-way switching valve 40 is placed in the stop cut-off state C, and the blade 22 of one drive device is stopped. (step b15).

Next, in block BS, the current time T is read from the clock 36 in order to adjust the swing period (step b
16), change the current time memory value Tn to the previous stop time Tn
, , and the current time T is stored as the current stop time Tn (step b17).

Then, the current stop time To and the previous stop time Tn,
(T n T n −+ ) (step b18), and calculates the actual period Tw [= 2 (Tn
-Tn-1)] and the target period T0 in step b.
1) If the difference (TIl-To) is less than the predetermined value (-ε), the opening degree of the variable orifice 29 is reduced by a predetermined value (b20), and the oscillation is performed so that the actual period Tw becomes the target period T0. Decrease the moving speed I! 4 Adjust.

Moreover, if the difference (Tw-T,) is larger than the predetermined value ε,
The opening degree of the variable orifice 29 is increased by a predetermined 1 (step b21), and the actual cycle Tw becomes the target cycle T. However, if the swinging speed is increased and the absolute value of the difference (Tw-T) falls within the predetermined value ε, the opening degree of the variable orifice 29 is not adjusted.

After adjusting the opening degree of the variable orifice 29 in steps) +19 to b21, the process returns to the next process 70-, where the processes in blocks 82 to B5 described above are executed again.

At this time, if the process of block B2 was performed in the previous process 70-, the rotation direction 7 lag F is changed from zero to 1 in step b9, so the next process 70-
In 0-, processing of block B3 is performed, that is, processing 70- is performed in the order of block "B2→B4→B5J" and block rB3→B4→
Processing 70- performed in the order of B5J is performed alternately.

As a result, with the patient fixed on the stretcher section 2 with rails,
Predetermined period T0 and predetermined swing angle ψ. can be swung. This rocking state of the fenced stretcher section 2 is shown by a two-dot chain line in the PIS 1 diagram.

Furthermore, since the working fluid pump 39 at 20 degrees of the working fluid supply 1A is located below and away from the stretcher section 2 with rails, the operating noise is extremely low and difficult to transmit, making it suitable for use in nursing critically ill patients. ing.

Note that the biloft oil pressure of the working fluid pump 39 or the rotation of the electric motor 38 may be adjusted without providing two variable orifices.

In addition, the rocking bed as an m3 embodiment of the present invention has 7
As shown in Fig. 38, the weights 43, 43 are installed so that the male threaded frames 42, 42 of the center of gravity adjustment mechanism 6 are protruded in the longitudinal direction of the horizontal member 13b of the H-shaped aggregate 13 of the stretcher section 2 with fences. It is configured to be interlocked by a weight interlocking device 44.

The other configurations of this PJ3 embodiment are the same as those of the first and second embodiments, and the effects can also be substantially the same as those of the first and second embodiments.

〔Effect of the invention〕

As detailed above, according to the rocking bed of the present invention,
A frame is provided with pillars erected at each end, and a stretcher part is pivotably supported on the pillars, and a support shaft protruding from and fixed to the stretcher part is interposed between the pillars. and a rocking structure for swinging the stretcher through the support shaft, and adjusts changes in the center of gravity of the rocking body due to changes in the weight of the patient lying on the stretcher. A center of gravity adjustment mechanism is provided, and the same center of gravity adjustment mechanism includes a weight that is adjusted to be raised and lowered by having a male threaded frame suspended from the lower portions of both sides of the stretcher portion, and a female threaded portion hinged to an open fiber threaded rod. The simple VT structure has the advantage of allowing fine adjustment of the center of gravity to be performed easily and quickly.

[Brief explanation of drawings]

1 to 5 show an oscillating bend as a first embodiment of the present invention, in which FIG. 1 is a front view thereof, FIG. 2 is an optical illusion diagram thereof, and FIG. 3 is a side view of its essential parts. FIG. 4 is a diagram showing the hydraulic oscillation mechanism, FIG. 5 is a 70-chart for explaining its operation, and FIGS. 6 and 7 are oscillation diagrams as a second embodiment of the present invention. 6 is a diagram showing the hydraulic rocking machine h1, FIG. 7 is a 70-chart for explaining its operation, and FIG. 8 is a diagram showing a third embodiment of the present invention. FIG. 1. Movable frame, 2. Horizontal stretcher section, 3. Support shaft,
4. Bearing, 5. Fluid pressure swing 8! Dry, 6. Center of gravity adjuster groove, 10. Lower frame, 11. Caster, 12.
・Strut, 13...H-shaped aggregate, 13a...Vertical member, 13
b...Horizontal member, 13c...Dovetail groove part, 14...Floor plate member, 14a...Bottom surface, 15...Mat, 16...Seed member,
17...Kushiten, 18...Support part, 19...Drive device, 20゜20''...Working fluid supply system, 21.21'.
- Oscillation control system, 22... Vane, 23... Fan-shaped fluid pressure chamber,
23a, 23b...end, 23C923d...wall, 2
4. Casing, 25. Fluid pressure silling, 25a. 25b...Outer periphery of both ends, 25c, 25d...Wall surface, 26
...Free piston made of magnetic material, 27...Schilling pump, 27a, 27b--Ml electromagnetic coil 28a. 28a', 28b, 28b'... Working fluid supply pipe, 2
9... variable orifice, 30... oil cooler as working fluid cooler, 31... control device, 31a... first control @ capital, 31b... second control part 1, 31c... rocking angle Mode switching control section, 31d... Swing period control section, 32.
・Power switch, 33...Manual switch, 34
・・Rotary bonoshishin sensor, 35a, 35b・・Limit switch, 36・・Clock, 37・・Oil tank, 38・・Electric motor, 39・・Pump for working fluid, 39a・・Discharge port, 40・・Three sides Switching valve, 40a, 4
0b...Electromagnetic coil, 41...Pressure pulp, 42
... Male thread frame, 42a... Male thread part, 43... Cylindrical weight, 43a... Female thread part, 44... Weight interlocking device, 44
a...Pulley, 44b...Wire or chain, 45
··floor.

Claims (2)

[Claims] (1) A pedestal with a support provided at each end, and a stretcher supported swingably on the support, and a space between the support shaft protruding from and fixed to the stretcher and the support. and a swinging mechanism for swinging the stretcher section through the support shaft, and adjusts changes in the center of gravity of the rocking body due to changes in the weight of the patient lying on the stretcher section. A center of gravity adjustment mechanism is provided, and the center of gravity adjustment mechanism includes a weight that is adjusted to be raised and lowered by having male threaded rods suspended from lower portions on both sides of the stretcher portion, and a female threaded portion screwed to the male threaded rods. A rocking bed characterized by comprising: (2) The rocking device according to claim 1, wherein a weight interlocking device is provided for adjusting the vertical movement of the weights screwed onto the respective male threaded rods on both sides of the stretcher section in conjunction with each other. type bed.