JPH0349506B2 - - Google Patents

Description

[Detailed description of the invention] The present invention will be explained in the following order.

A. Field of industrial application B. Outline of the invention C. Prior art D. Problem to be solved by the invention E. Means for solving the problem F. Effect G. Example G. _1. Description of the entire delivery table (Figures 1A to 1C ) Explanation of the G ₂ auxiliary plate drawer mechanism (Figures 2A to 4)
(Figure C) G ₃ Explanation of the slide platform drive mechanism (Figure 5) G ₄ Explanation of the seat plate and back plate drive mechanism (Figures 6A and 6B) G ₅ Explanation of the back plate slide mechanism (Figures 7 and 6) 8
Figure) H Effect of the Invention A Industrial Field of Application The present invention is applicable to various medical tables for childbirth, medical examinations, etc., such as delivery tables and medical examination tables, with the patient in a sitting position. It is related to.

B. Summary of the Invention The present invention provides a medical table having a seat plate and a back plate whose angle is adjustable with respect to the seat plate, in which an auxiliary plate stored under the seat plate is moved from below the seat plate to the front of the seat plate. By using a rack and pinion mechanism for pulling out, the auxiliary plate can be pulled out quickly.

C. Prior Art A conventional delivery table has a seat plate, a back plate whose angle can be adjusted with respect to the seat plate, and an auxiliary table stored under the seat plate. In addition to retracting the seat to the bottom, the angle of the back plate can be adjusted to allow the patient to take the optimal sitting position.
There is one in which the auxiliary stand is pulled out in front of the seat plate so that the back plate, the seat plate, and the auxiliary stand are set in one horizontal plane.

D Problems to be Solved by the Invention However, this conventional delivery table uses a hydraulic cylinder with a long stroke that is the same as the slide of the auxiliary plate to pull the auxiliary table forward at low speed, which causes problems in emergencies. Ta.

That is, in this type of delivery table, when not in use, the auxiliary table is usually stored under the seat plate, and the whole delivery table is folded up compactly. However, in the case of an emergency patient admitted in the middle of the night, etc., it is necessary to take measures such as pulling out the auxiliary table to the front of the seat, placing the patient in a supine position, and waiting for the arrival of the doctor.

In such an emergency, it is necessary to pull out the auxiliary platform in front of the seat board as quickly as possible, but in the past, there was a problem in that the auxiliary platform had to be pulled out at a slow speed.

Furthermore, in the past, it was necessary to use a hydraulic cylinder with a long stroke equal to that of the slide of the auxiliary table, and there was a problem in the mounting space for the hydraulic cylinder.

SUMMARY OF THE INVENTION An object of the present invention is to provide a medical table from which an auxiliary plate can be quickly pulled out from below the seat plate toward the front of the seat plate.

E Means for Solving the Problems In order to achieve the above object, the medical table of the present invention includes an auxiliary plate stored under the seat plate, and a slide table for pulling out the auxiliary plate from below the seat plate to the front of the seat plate. and a rack and pinion mechanism consisting of a fixed rack provided on the slide base, a slide rack provided on the slide base, and a pinion that is rolled between these fixed racks and the slide rack, and a rack and pinion mechanism that rotates the pinion. It is equipped with a driving means for causing the

F. Effect The medical table constructed as described above uses a rack and pinion mechanism that allows the slide rack to slide at twice the driving speed of the pinion by the drive means, and moves the auxiliary plate from below the seat plate to the seat plate. It can be pulled forward quickly. Moreover, since the slide rack can be slid by a distance twice the driving distance of the pinion by the driving means, if the driving means is composed of a hydraulic cylinder or the like, the length of the hydraulic cylinder is equal to the sliding stroke of the slide base. It can be reduced to 1/2.

G Example Hereinafter, an example in which the present invention is applied to a delivery table will be described with reference to the drawings.

_G1 First, the entire delivery table will be explained with reference to FIGS. 1A to 1C.

This delivery table is provided with an elevating table 2 on the upper part of a base 1, and a seat plate 3, a back plate 4, and two auxiliary plates 5, 6 on the upper part of the elevating table 2. And base 1
The height of the entire seat plate 3, back plate 4, and two auxiliary plates 5 and 6 is increased by vertically adjusting the lifting platform 2 at the top of the platform by a lifting platform drive mechanism (not shown). is configured to be adjusted.
In addition, the seat plate 3 and back plate 4 are configured so that their angles can be adjusted in the vertical direction, arrows a, a', and the front-rear direction, arrows b, b', respectively, by a seat plate and back plate drive mechanism, which will be described later. has been done. Also, 2
The auxiliary plates 5 and 6 are moved from the storage position under the seat plate 3 shown by the dashed line in FIG.
It is constructed so that it can be selectively pulled out to the front pull-out position of the seat plate 3, which is shown by solid lines in the drawings and FIG. 1B. A pair of left and right handles 8, steps (or knee rests) 9, etc. are provided on both sides of the seat plate 3 and at lower positions on both sides.

When this delivery table is used for childbirth, as shown in FIG. 1A, arrows b and
By adjusting the angle in the b′ direction, the patient can take the optimal sitting posture. Then, slide only one auxiliary plate 5 from below the seat plate 3 to the front of the seat plate 3.
pull it out in the direction of arrow c, and remove the other auxiliary plate 6.
The height of only one of the auxiliary plates 5 that is pulled out can be adjusted in the directions of arrows d and d', which are the vertical directions relative to the seat plate 3, while the auxiliary plate 5 remains stored under the seat plate 3. Therefore, when performing umbilical cord processing with the delivered fetus placed on the auxiliary plate 5 pulled out in front of the seat plate 3 during a sitting delivery, the length of the umbilical cord varies depending on each fetus. By adjusting the height of the auxiliary plate 5 in the directions of arrows d and d' according to the height of the auxiliary plate 5, each fetus can be supported by the auxiliary plate 5 at the optimal height for each fetus, allowing for delivery assistance and umbilical cord treatment. etc. can be done safely and smoothly.

In addition, this delivery table has two auxiliary plates 5 and 6 placed under the seat plate 3 and in front of the seat plate 3, as shown in FIG. arrow c by slide base 7
After pulling out simultaneously in the direction, both auxiliary plates 5, 6 are simultaneously raised upward in the direction of arrow d, and both auxiliary plates 5, 6 are arranged in series at a height substantially flush with the seat plate 3. If the back plate 4 is horizontally tilted in the direction of arrow b', it becomes a horizontal bed for supine posture.

When this delivery table is not in use, the back plate 4 is laid down horizontally as shown in Figure 1B, and the two auxiliary plates 5 and 6 are placed under the seat plate 3 as shown by the dashed line in Figure 1B. By storing it in the direction of arrow c', the entire delivery table can be folded into a compact size.

In addition, in the case of an emergency such as when a patient develops anemia during sitting delivery, this delivery table can move the back plate 4 in the direction of arrow b' from the elevation angle shown by the dashed line in Fig. 1C to the depression angle state shown by the solid line. By simply tilting the seat plate 3 in a single motion, the seat plate 3 can be rotated together with the back plate 4 in the direction of arrow a from a horizontal state shown by a dashed line in FIG. 1C to an elevated state having the same angle as the back plate 4.

This delivery table is equipped with a foot switch (Fig. (not shown).

_G2 Next, the auxiliary plate pull-out mechanism 11 will be explained with reference to FIGS. 2A to 4C.

First, to explain the structure of this auxiliary plate pull-out mechanism 11, a slide table 7 is arranged horizontally on a slide table base 12 of an elevating table 2, and a pair of guide shafts 13 horizontally attached to the slide table 7 slide. Guided by a plurality of guide wheels 14 rotatably mounted on the table base 12,
The slide table 7 is configured to be driven horizontally in the directions of arrows c and c' by a slide table drive mechanism, which will be described later, which is a first driving means. Two pantographs are supported on the slide table 7 by supporting two auxiliary plates 5 and 6, which are arranged back and forth in the slide direction (arrows c and c' directions) so as to be movable up and down in the arrows d and d' directions, respectively. Mechanism 16
a, 16b are provided.

And both pantograph mechanisms 16a, 16b
are a pair of links 17a, 17b and 1, respectively.
It is composed of a pair of left and right X-shaped links in which the center portions of 8a and 18b are connected in an X-shape by pins 19a and 19b. The upper end of one link 17a, 17b of both X-shaped links and the lower end of the other link 18a, 18b are fixed to the lower surface of both auxiliary plates 5, 6 by pins 20a, 20b and 21a, 21b. , 22b and the slide base 7, respectively, and guide rollers 23a, 23b and 2 are rotatably attached to the lower ends of one link 17a, 17b and the upper end of the other link 18a, 18b.
4a and 24b are the guide rails 2 fixed to the lower surfaces of both auxiliary plates 5 and 6 and the slide base 7, respectively.
5a, 25b and 26a, 26b so as to be movable in the directions of arrows c and c', respectively.

And both pantograph mechanisms 16a, 16b
Driven parts 27a, 27b are arranged between a pair of left and right guide rails 25a and 25b, and both left and right sides of these driven parts 27a, 27b are connected to roller shafts 28a, 2 of guide rollers 23a, 23b.
8b and the roller shafts 30 of the other guide rollers 29a and 29b, which are configured to be movable in the directions of arrows c and c' along the guide rails 25a and 25b.
a, 30b.

A hydraulic cylinder 3 which is a second driving means
The base of the second cylinder 32a is fixed to the slide base 7 by a bracket 33, and the tip of the piston rod 32b is connected by a pin 34 to a bracket 35 fixed to the driven part 27a of the one pantograph mechanism 26a. .

Then, the arrow e,
A connecting means 38 consisting of a rotary arm rotatably attached in the e' direction is provided, and a groove-shaped locking portion 39 provided at the tip of the connecting means 38 is connected to the driven portion 27a of one pantograph mechanism 16a.
It is configured such that it can be engaged with and disengaged from a pin-shaped engagement portion 40 provided in the directions of arrows e and e'. and. A separation means 41 consisting of a substantially chevron-shaped cam-like protrusion is fixed in the middle of the sliding direction (arrow c, c' direction) of the slide table 7, and a separation means 41 is fixed to the slide table 7 in the sliding direction (arrow c, c' direction). The contact means 42 is the separation means 4.
1 so that it can be contacted.

Next, the operation of this auxiliary plate pull-out mechanism 11 will be explained.

First, FIG. 4A shows the retracted state of both the auxiliary plates 5 and 6, and when the piston rod 32b of the hydraulic cylinder 32 is retracted in the direction of arrow c' in FIG.
Both driven parts 27a, 27b of pantograph mechanism 16b are simultaneously moved in the direction of arrow c' while being connected by connecting means 38, and both pantograph mechanisms 16a, 1
6b is folded in the direction of arrow d'. In this state, the slide table 7 is retracted in the direction of arrow c' by a slide table drive mechanism to be described later, and both the auxiliary plates 5 and 6 are stored under the seat plate 3.

Next, FIG. 4B shows a state in which only one auxiliary plate 5 is pulled out in front of the seat plate 3.

In this case, the slide table 7 is moved from the bottom of the seat plate 3 by the arrow c by the slide table drive mechanism described later.
direction by about 1/2 stroke, and stop at a position where only one auxiliary plate 5 is pulled out in front of the seat plate 3 as shown by the one-dot chain line.
At this time, as shown in FIG. 2A, the connecting means 38
The contacting means 42 rides on the separating means 41, the connecting means 38 is rotated in the direction of arrow e about the rotational fulcrum 37, and the locking part 39 is connected to the engaging part 40.
The driven portion 27b of the other pantograph mechanism 16b is separated from the driven portion 27a of the one pantograph mechanism 16a. Therefore, when the piston rod 32b of the hydraulic cylinder 32 is pushed out in the direction of the arrow c in FIG.
is moved in the direction of arrow c, this pantograph mechanism 16a extends in the direction of arrow d, and only one auxiliary plate 5 is pushed up in the direction of arrow d, as shown by the solid line. Therefore, by controlling the movement of the piston rod 32a of the hydraulic cylinder 32 in the directions of arrows c and c' in FIG. 3, one pantograph mechanism 16a is extended and contracted in the directions of arrows d and d'.
The height of one auxiliary plate 5 relative to the seat plate 3 can be adjusted in the directions of arrows d and d'.

Next, FIG. 4C shows a state in which the two auxiliary plates 5 and 6 are simultaneously pulled out in front of the seat plate 3.

In this case, the slide table 7 is moved from the bottom of the seat plate 3 by the arrow c by the slide table drive mechanism described later.
direction by the entire stroke, and pull out the two auxiliary plates 5 and 6 in front of the seat plate 3. At this time, the contact means 42 of the coupling means 38 rides on the separation means 41 while the slide table 7 is sliding, and the coupling means 38 is once rotated in the direction of arrow e in FIG. 2B. By sliding in the direction of the arrow c, the contact means 42 passes over the separation means 41 in the direction of the arrow c, so that the connecting means 38 is rotated back by its own weight in the direction of the arrow e' in FIG. 2B. Then, when the slide base 7 is slid in the direction of arrow c by the entire stroke,
As shown in FIG. 2B, the locking part 39 of the connecting means 38 is engaged with the engaging part 40 of the driven part 27a, and both driven parts 27a, 27b of both pantograph mechanisms 16a, 16b are connected to the connecting means 38. It remains connected by. Therefore, when the piston rod 32b of the hydraulic cylinder 32 is pushed out in the direction of the arrow c in FIG. direction, both pantograph mechanisms 1
6a, 16b extend in the direction of arrow d, and both auxiliary plates 5, 6 are simultaneously pushed up in the direction of arrow d. As a result, both auxiliary plates 5 and 6 can be arranged in series in front of the seat plate 3 at a height substantially flush with the seat plate 3, as shown by solid lines.

_G3 Next, the slide table drive mechanism 44 will be explained with reference to FIG.

This slide table drive mechanism 44 includes a fixing rack 45 fixed on the slide table base 12,
A rack and pinion mechanism 49 constituted by a slide rack 47 fixed to the slide base 7 by a plurality of brackets 46 and a pinion 48 that rolls between these racks 45 and 47.
and a hydraulic cylinder 50 which is a driving means for rolling the pinion 48.
Note that this hydraulic cylinder 50 also serves as a first driving means for driving the slide table 7 in the auxiliary plate drawing mechanism 11. And hydraulic cylinder 5
A cylinder 50a of 0 is fixed on the slide base 12 by a plurality of brackets 51, and a pinion 48 is rotatably attached by a pinion shaft 53 to a holder 52 attached to the tip of a piston rod 50b.

According to this slide table drive mechanism 44, the piston rod 50b of the hydraulic cylinder 50 is moved by the arrow c.
When pushed in the direction, the pinion 48 of the rack and pinion mechanism 49 is rotated on the fixed rack 45 in the direction of the arrow f and moved in the direction of the arrow c, and the pinion 48 moves the slide rack 47 and the slide base 7 integrated therewith. is moved in the direction of arrow c at a speed twice the driving speed of pinion 48 in the direction of arrow c (the pushing speed of piston rod 50b). Therefore, the arrow c of the piston rod 50b
By pushing in the direction of the arrow c' and pulling in the direction of the arrow c', the two auxiliary plates 5,
6 can be quickly pulled out from below the seat plate 3 to the front of the seat plate 3 in the direction of arrow c and quickly pulled back in the direction of arrow c'. Since the rack and pinion mechanism 49 can slide the slide rack 47 in the directions of arrows c and c' by a distance twice the driving distance of the pinion 48, the length is 1/2 of the slide stroke of the slide base 7. hydraulic cylinder 50 can be used.

_G4 Next, the seat plate and back plate drive mechanism 55 will be explained with reference to FIGS. 6A and 6B.

First, the structure of the seat plate and back plate driving mechanism 55 will be explained. A bracket 57 is fixed on a stand 56 fixed on the slide base 12, and a bracket 57 is fixed on the stand 56 fixed on the slide base 12. A pair of rotating arms 58 and 59 fixed to the lower back surface are rotatably attached to a pivot point 60 supported by a bracket 57, and the seat plate 3 and back plate 4 are moved in the vertical direction with the pivot point 60 as the center. It is configured to be rotatable in directions a, a' and arrows b, b', which are front and rear directions.

The hydraulic cylinder 61, which constitutes a first hydraulic cylinder that rotates the seat plate 3 only in one direction upward, that is, in the direction of arrow a, is configured as a single-acting hydraulic cylinder. That is, in this hydraulic cylinder 61, the cylinder 61a is connected to the stand 61 by a pin 62, and the tip of the piston rod 61b is connected to the tip 58 of the substantially L-shaped rotating arm 58.
a by a pin 63. The hydraulic pressure is supplied to and discharged from one hydraulic port 61e to one hydraulic chamber 61d provided on one side of the piston 61c in the cylinder 61a.

In addition, the back plate 4 is indicated by arrows b, which are the front and rear directions.
The hydraulic cylinder 68 constituting the second hydraulic cylinder that is rotatably driven in both directions b' is configured as a double-acting hydraulic cylinder. That is, in this hydraulic cylinder 68, the cylinder 63a is connected to the stand 56 by a pin 69, and the piston rod 6
The other end of the intermediate link 71 has one end connected to the tip of the intermediate link 8b by a pin 70, and the other end of the intermediate link 71 has the pin 7 connected to the tip of a rotary bracket 72 fixed to the lower rear surface of the back plate 4.
Connected by 3. Note that the guide roller 7 is rotatably attached to the outer periphery of the pin 70.
4 is guided between a pair of upper and lower guide rails 75 fixed to the stand 56 and moved in the directions of arrows c and c'. The hydraulic pressure is alternately supplied and discharged from two hydraulic pressure ports 68f and 68g to a pair of hydraulic chambers 68d and 68e provided on both sides of a piston 68c in the cylinder 68a.

Next, the operation of this seat plate and back plate drive mechanism 55 will be explained.

First, as shown in FIG. 6B, when hydraulic pressure is supplied to the hydraulic chamber 61d of the hydraulic cylinder 61 from the hydraulic inlet/outlet 61e and the piston rod 61d is pushed out in the direction of the arrow c through the piston 61c, the piston rod 61d is pushed out through the rotary arm 58. The seat plate 3 is pushed up in the direction of arrow a around the pivot point 60. And the sixth
As shown in Figure A, the hydraulic chamber 6 of the hydraulic cylinder 61
When the hydraulic pressure within 1d is discharged from the hydraulic inlet/outlet 61e, the seat plate 3 is lowered in the direction of the arrow a' around the pivot point 60 by its own weight and the weight of the patient.

Next, as shown in FIG. 6A, hydraulic pressure is supplied to one hydraulic chamber 68d of the hydraulic cylinder 68 from one hydraulic inlet/outlet 68f, and the piston rod 68b is pushed out in the direction of arrow c' via the piston 68c. Intermediate link 71 and rotating bracket 7
2, the back plate 4 is rotated in the direction of arrow b about the rotation fulcrum 60. Then, as shown in FIG. 6B, the other hydraulic chamber 68 of the hydraulic cylinder 68
When hydraulic pressure is supplied to e from the other hydraulic inlet/outlet 68g, the back plate 4 is rotated about the pivot point 60 in the direction of arrow b'.

Next, during sitting delivery, when changing the patient's position from sitting to supine depression, the 6th
As shown in Figure B, the hydraulic cylinder 68
is rotated rearward in the direction of arrow b' about the rotational fulcrum 60, and from the elevation angle state shown in FIG. 6A to the sixth
Perform a one-step motion to bring the robot down at once to the depression angle shown in Figure B. Then, at this time, from the time when the back plate 4 becomes almost flush with the seat plate 3 (horizontal state),
The tip 59a of the rotating arm 59 is located on the lower surface 7 of the seat plate 3.
6 from the direction of arrow b' to quickly rotate the seat plate 3 together with the back plate 4 upward in the direction of arrow a. At this time, the rotary arm 58, which is rotated together with the seat plate 3 in the direction of arrow a, simply pulls the piston rod 61b and piston 61c of the single-acting hydraulic cylinder 61 in the direction of arrow c to release them from the hydraulic chamber 61d. The seat plate 3 can be smoothly rotated together with the back plate 4 in the direction of arrow a by the rotary arm 59 without being restricted in any way by the hydraulic cylinder 61.
The rotation arm 59 rotates the back plate 4 and the seat plate 3 in the direction of arrow b and the direction of arrow a while always integrally connecting the back plate 4 and the seat plate 3 in a substantially flush state. There is no possibility that the seat plate 3 will unexpectedly fall over at an angle of depression greater than the elevation angle of the seat plate 3.

Here, the rotation of the back plate 4 in the direction of the arrow b' causes the seat plate 3 to be rotated in the direction of the arrow a by the rotating arm 59 fixed to the back plate 4 side. When the back plate 4 and the seat plate 3 become almost flush during rotation in the ' direction, the back plate 4 is brought into contact with the rotating arm 58 fixed to the seat plate 3 side, and the subsequent The configuration may be such that the continued rotation of the back plate 4 in the direction of arrow b' causes the back plate 4 to rotate the seat plate 3 in the direction of arrow a via the rotating arm 58.

_G5 Next, the back plate sliding mechanism 78 will be explained with reference to FIGS. 7 and 8.

This back plate sliding mechanism 78, as shown in FIG.
is fixed to the rear surface of the lower end of the rotating frame 79, and the rotating bracket 7
2 is driven, the rotating frame 79
is configured to be rotationally driven in the directions of arrows b and b', which are the front and rear directions, around the rotation fulcrum 79 at the lower end of the rotation arm 59. The back plate 4 is fitted into the front surface of the rotating frame 79 by a recess 80 provided along the back surface of the back plate 4, and the back plate 4 is fitted in the up-down direction along the front surface of the rotating frame 79. It is attached so that it can slide in the g and g' directions.

At this time, as shown in FIG. A pair of left and right roller bearings 84 are interposed between a pair of left and right guide rails 83 provided on the back surface of the back plate frame 82. In addition, the back plate frame 8
A pair of substantially L-shaped guide frames 85 on the left and right fixed to the back surface of the frame 2 are opposed to a synthetic resin slippery sheet 86 fixed on two sides of the pair of left and right columns 79a by adhesive or the like. Therefore, the back plate 4
can slide extremely smoothly in the directions of arrows g and g' with respect to the rotating frame 79 by the roller bearings 84 and the slippery sheet 86, and this back plate 4 can slide downwardly relative to the rotating frame 79 due to its own weight. It is urged to slide in the direction of arrow g', which is the side.

According to this back plate sliding mechanism 78, as shown in FIG. Adjust the angle of the back plate 4 in the directions of arrows b and b'. At this time, since the back plate 4 is constantly urged to slide in the direction of arrow g', which is the downward side of the rotating frame 79, due to its own weight, the front corner 4a of the lower end of the back plate 4 is moved behind the seat plate 3. The angle of the back plate 4 in the directions of arrows b and b' can be adjusted while it is in constant contact with the corner 3a of the upper end surface. That is, the rotating frame 79 is in the direction of arrow b.
When the lower end 79b of the rotating frame 79 approaches the corner 3a of the seat plate 3,
The back plate 4 slides in the direction of arrow g with respect to the rotating frame 79, and the rotating frame 79 is rotated in the direction of arrow b', and the lower end 79 of the rotating frame 79 is rotated in the direction of arrow b'.
When b moves away from the corner 3a of the seat plate 3,
The back plate 4 slides in the direction of arrow g' with respect to the rotating frame 79. Therefore, the corner 4a of the back plate 4 is not brought closer to or separated from the corner 3a of the seat plate 3, and both corners 4a
The angle of the back plate 4 in the directions of arrows b and b' can be adjusted while a and 3a are always kept in contact at one location. As a result, when the back plate 4 is raised in the direction of arrow b, the corner 4a of the back plate 4 is aligned with the corner 3 of the seat plate 3.
Inconveniences such as approaching a in the direction of arrow c and accidentally pinching the patient's buttocks at these corners 4a and 3a, or pushing the patient's buttocks in the direction of arrow c at the corner 4a of the back plate 4. does not occur at all.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various effective changes can be made based on the technical idea of the present invention.

For example, in the above embodiment, a hydraulic cylinder is used as the driving means for the rack and pinion mechanism, but an air cylinder or the like may also be used.

Furthermore, the present invention is not limited to delivery beds, but
It can be widely applied to various medical tables such as examination tables and operating tables.

H Effects of the Invention Since the present invention is configured as described above, it produces the following effects.

The rack and pinion mechanism allows the slide rack to slide at twice the speed at which the pinion is driven by the drive means, making it possible to quickly pull out the auxiliary plate from under the seat plate to the front of the seat plate. Ability to quickly respond to emergencies.

Furthermore, if the slide rack is made to slide a distance twice the driving distance of the pinion by the driving means, and the driving means is composed of a hydraulic cylinder or the like, the length of the hydraulic cylinder is equal to the sliding stroke of the slide base. Since the size can be reduced to 1/2, the installation space for drive means such as hydraulic cylinders can be reduced to 1/2 of the conventional size, making it possible to downsize the medical table.

P.S. By using two racks, the present invention can
This allows the auxiliary plate to be pulled out more quickly than when using a single rack. However, even if one rack is used, if the amount of oil supplied to the hydraulic cylinder is increased, it is possible to pull out the auxiliary plate as quickly as in the case where two racks are used. However, the method of increasing the amount of oil supplied to the hydraulic cylinder requires increasing the size of the hydraulic pump, piping, oil tank, etc., which is disadvantageous in terms of cost and space. Furthermore, in this type of medical table, the back plate and seat plate must be moved slowly to prevent patients from feeling anxious, whereas the auxiliary plate, which is often used in emergencies, must be moved quickly. Therefore, when the combined oil supply amount of the auxiliary plate is set, it becomes necessary to throttle the oil supply amount to the hydraulic cylinders that drive the back plate and the seat plate using a flow rate regulating valve.
Moreover, by restricting the amount of oil supplied, cavitation occurs in the flow rate regulating valve, causing vibration, heat, and abnormal noise. Further, by reducing the amount of oil supplied, the load on the hydraulic pump drive motor increases, causing overheating of the motor, so it is impossible to increase the amount of oil supplied.

Further, in the present invention, by using two racks, the auxiliary plate can be pulled out with a large stroke using a small hydraulic cylinder. However, the same objective could be achieved without using two racks by using a hydraulic cylinder with a large stroke. However, as in this type of medical table, a long, thin hydraulic cylinder that must be installed in a limited space is a custom-made product, leading to increased costs. Moreover, a thin and long hydraulic cylinder has a problem of low buckling strength, the entire cylinder is distorted, oil leaks easily occur in the cylinder, and the cylinder lacks reliability.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIGS. 1A to 1C are side views explaining the structure and operation of the entire delivery table, and FIGS. 2A and 2B are side views of the auxiliary plate pull-out mechanism. The third part explains the configuration and operation.
Figure 3 is a plan view of the auxiliary plate pull-out mechanism, Figures 4A to 4C are schematic side views illustrating the auxiliary plate pull-out operation, and Figure 5 is the slide platform drive mechanism. 6A and 6B are partially cutaway side views illustrating the configuration and operation of the seat plate and back plate drive mechanism,
Fig. 7 is a partially cutaway side view illustrating the configuration and operation of the back plate sliding mechanism, and Fig. 8 is the - of Fig. 7.
It is an enlarged cross-sectional view in the direction of arrows. In addition, in the symbols used in the drawings, 3...seat plate,
4... Back plate, 5, 6... Auxiliary plate, 7... Slide stand, 44... Slide stand drive mechanism, 45... Fixed rack, 47... Slide rack, 48... Pinion, 49... Rack. Pinion mechanism, 50...
It is a hydraulic cylinder (driving means).

Claims (1)

[Scope of Claims] 1. A medical table having a seat plate and a back plate whose angle can be adjusted with respect to the seat plate, an auxiliary plate stored under the seat plate, and a back plate whose angle is adjustable with respect to the seat plate, and an auxiliary plate stored under the seat plate. A slide base that can be pulled out from the front of the seat plate,
A rack and pinion mechanism consisting of a fixed rack provided on the slide base, a slide rack provided on the slide base, and a pinion that rolls between these fixed racks and the slide rack, and a drive that rolls the pinion. A medical table characterized by being equipped with a means.