JPH02220659A - medical table - Google Patents

Abstract

PURPOSE:To quickly correspond to a state of emergency and to miniaturize a medical treatment table by quickly drawing out an auxiliary plate from the part under a seat plate to the front of the seat plate by a rack/pinion mechanism. CONSTITUTION:When a piston rod 50b is pushed out in a c-direction by a slide table driving mechanism 4, the pinion 48 of a rack/pinion mechanism 49 moves on a fixed rack 45 while rotates on its own axis in an f-direction and a slide table 7 moves along with a slide rack 47 at a speed twice the driving speed of the pinion 48. Therefore, two auxiliary plates 5, 6 can be quickly drawn out from the part under a seat plate 3 to the front of said seat plate 3 by pushing out the piston rod 50b and retracted by retracting said piston rod 50b. Since the rack/pinion mechanism 49 can be slide at a speed twice the driving speed of the pinion 48, a hydraulic cylinder 50 having a length 1/2 the slide stroke of the slide table 7 may be used.

Description

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

A. Industrial Field of Application Overview of the Invention Conventional Technology Problems to be Solved by the Invention Means for Solving the Problems Working Embodiments G9 Description of the entire delivery table (Figures 1A to 1C) Explanation (Figures 2A to 4C) G. Explanation of the slide drive mechanism (Figure 5) 64 Explanation of the seat plate and back plate drive mechanism (Figures 6A and 6B) G5 Explanation of the back plate slide mechanism ( (Figures 7 and 8) H Effect of the Invention A Industrial Field of Use The present invention is a device for use in childbirth, medical examinations, etc. by making the patient take a sitting position, such as a delivery table or a medical examination table. This relates to medical tables for various medical purposes.

B. Summary of the Invention The present invention provides a medical table having a seat plate and a back plate whose angle can be adjusted with respect to the seat plate. By using a rack and pinion mechanism, the auxiliary plate can be quickly pulled out.

C. Conventional technology A conventional delivery table has a seat, a back plate whose angle can be adjusted with respect to the seat, and an auxiliary table that is stored under the seat. At the same time, by adjusting the angle of the back plate, the patient can take an optimal sitting posture. During supine delivery, the auxiliary table can be pulled out in front of the seat plate, so that the back plate, seat plate, and auxiliary table are aligned on a horizontal plane. There is something you can set.

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 table to pull the auxiliary table forward at low speed, which poses a problem in an emergency. 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 with the installation of the hydraulic cylinder in terms of space.

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 base 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 the fixed rack and the slide rack;
A driving means for rolling the pinion is provided.

F. Function The medical table configured as described above moves the auxiliary plate from below the seat plate to the front of the seat plate using a rack and pinion mechanism that can slide the slide rack at twice the speed at which the pinion is driven by the drive means. Can be pulled out 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 noise.

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

G+ First, the entire delivery table will be described 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. Then, by vertically adjusting the lifting table 2 on the upper part of the base 1 by a lifting table driving mechanism (not shown), the seat plate 3, the back plate 4, and the two auxiliary plates 5.6 are all raised and lowered. Configured to be height adjustable. Further, the seat plate 3 and the back plate 4 are configured so that their angles can be adjusted in the up-down direction, ie, the arrow aSa'' direction, and the front-rear direction, ie, the arrows S and b'' directions, respectively, by a seat plate and back plate drive mechanism that will be described later. In addition, the two auxiliary plates 5.6 are the slide bases 7, which will be described later.
1A and 1B from the storage position under the seat plate 3 shown by the dashed line in FIG. 1B.
It is configured so that it can be selectively pulled out to a pulled-out position in front of the seat plate 3, which is indicated by a solid line in the figure. A pair of left and right handles 8, steps (or miscellaneous expenses) 9, etc. are provided on both sides of the seat plate 3 and at lower positions on both sides.

When giving birth in a seated position, this delivery table allows the patient to take an optimal sitting posture by adjusting the angle of the back plate 4 in the front-rear direction, ie, in the direction of arrows "A" and "B", as shown in FIG. 1A.
Only one of the auxiliary plates 5 is pulled out from under the seat plate 3 to the front of the seat plate 3 in the direction of arrow C using the slide base 7, while the other auxiliary plate 6 remains stored under the seat plate 3, and one of the auxiliary plates 5 is pulled out. Only the auxiliary plate 5 is shown in the vertical direction with respect to the seat plate 3, which is the arrow d.
The height can be adjusted in the d' direction. Therefore, when performing a belt adjustment process 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 cord varies depending on each fetus. Auxiliary plate 5 according to
By adjusting the height in the directions of arrows d and d', each fetus can be supported by the auxiliary plate 5 at the optimal height each time, and delivery assistance, banding treatment, etc. can be performed safely and smoothly. be able to.

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. After pulling out simultaneously in the direction of arrow C using the slide base 7, the true auxiliary plate 5
．． 6 are simultaneously raised upward in the direction of arrow d, and the true auxiliary plate 5.6 is arranged in series at a height substantially flush with the seat plate 3. If the back plate 4 is horizontally laid down in the direction of arrow b', it becomes a horizontal bed for the supine position.

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 a seated delivery, this delivery table can move the back plate 4 in the direction of arrow b' from the elevation angle state 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 one step, 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.

And, this delivery table has arrows a and a on the seat plate 3 and back plate 4.
Adjustment of the angle in the 'direction and the directions of arrows 5 and 6' as well as control of drawing out and storing the two auxiliary plates 5 and 6 are performed using a hand switch (not shown).

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

First, the configuration of this auxiliary plate drawer mechanism 11 will be explained.
A slide table 7 is arranged horizontally on a slide table base 12 of the lifting table 2, and a pair of guide shafts 13 are horizontally attached to the slide table 7, and a plurality of guide shafts are rotatably attached on the slide table base 12. Guided by 14,
The slide table 7 moves horizontally in the direction of arrows c and c'.
It is configured to be driven by a slide table drive mechanism, which will be described later, which is a WIA movement means. Two pantographs are supported on the slide table 7 by supporting two auxiliary plates 5.6 which are disposed back and forth in the sliding direction (directions of arrows c and c') so as to be movable up and down in the directions of arrows d and d', respectively. Mechanism 16
a and 16b are provided.

Both pantograph mechanisms 16a, 16b are each composed of a pair of left and right X-shaped links in which the central portions of a pair of links 17a, 17b and 18a, 18b are connected in an X-shape by bins 19a, 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 connected to pins 20a, 20b and 21.
The protrusions 22a, 22b fixed to the lower surface of the true auxiliary plate 5.6 by a, 21b are rotatably attached to the slide base 7, respectively, and the lower end of one link 17a517b and the other link 18a, 18b. Guide rollers 23a, 23b and 24a rotatably attached to the upper end
, 24b are fixed to the lower surface of the true auxiliary plate 5.6 and the slide base 7, respectively. Guide rails 25a, 25b and 26
It is configured to be movable in the directions of arrows c and c' along a and 26b, respectively.

Both pantograph mechanisms 16a, 16b (7) driven parts 27a, 27b are connected to a pair of left and right guide rails 25a.
and between 25b, and these two-wave drive parts 27a,
The left and right sides of 27b are roller shafts 28a, 28b of guide rollers 23a, 23b, and another roller shaft 30a of guide rollers 29a, 29b configured to be movable in directions of arrows c and c' along guide rails 25a, 25b. , 30
It is supported by b.

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

The driven portion 27 of the other pantograph mechanism 26b
b is provided with a connecting means 38 consisting of a rotary arm rotatably mounted in the directions of arrows e and e around a rotational fulcrum 37, and a groove-shaped locking portion 39 provided at the tip of this connecting means 38 is provided. Driven part 27a of one pantograph mechanism 16a
The arrows e, e'
It is configured so that it can be locked and removed from any direction. and,
A separation means 41 consisting of a substantially chevron-shaped cam-like protrusion is fixed in the middle of the sliding direction of the slide table 7 (in the direction of arrows c and c'), and the separation means 41 is fixed in the middle in the sliding direction of the slide table 7 (in the direction of arrows c and c'). The contact means 42 is configured to be able to contact the separation means 41.

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

First, FIG. 4A shows the retracted state of both sleeve auxiliary plates 5.6, and the piston rod 32b of the hydraulic cylinder 32 is in the third position.
By being pulled in the direction of force indicated by arrow C' in the figure, both wave drive parts 27a and 27b of both pantograph mechanisms 16a and 16b are
are connected by the connecting means 38 and at the same time arrow C
'Moved in the force direction, both pantograph mechanisms 163.16b
is folded in the direction of arrow d'. In this state, the slide table 7 is pulled in the direction of arrow C' force by the slide table drive mechanism as will be described later, and both sleeve support plates 5.6 are moved to the seat plate 3.
is stored under.

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 drive mechanism described later slides the slide table 7 from below the seat plate 3 in the direction of arrow C by approximately each stroke, so that only one auxiliary plate 5 is moved as shown by the dashed line. It is stopped at the position where the seat plate 3 is pulled out in front. At this time, as shown in FIG. 2A, the contact means 42 of the connecting means 38 rides on the separating means 41, and the connecting means 38 is rotated in the direction of arrow e about the pivot point 37.
The locking portion 39 is disengaged above the engaging portion 40, and 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 loft 32b of the hydraulic cylinder 32 is pushed out in the direction of arrow C in FIG. As a result, only one auxiliary plate 5 is pushed up in the direction of arrow d as shown by the solid line. Therefore, the piston rod 3 of the hydraulic cylinder 32
2a in the directions of arrows c and c' in FIG. 3, one pantograph mechanism 16a is moved in the directions of arrows d and d'.
The height of one auxiliary board 5 can be adjusted in the directions of arrows d and d' with respect to the seat board 3 by expanding and contracting in the directions.

Next, Fig. 4C shows that the two auxiliary plates 5.6 are simultaneously connected to the seat plate 3.
It is shown pulled out to the front.

In this case, the slide table 7 is slid from below the seat plate 3 by the entire stroke in the direction of arrow C using a slide table drive mechanism to be described later, and the two auxiliary plates 5.6 are pulled out 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 arrow C, the contact means 42 passes over the separating means 41 in the direction of arrow C, so that the connecting means 38 returns to its own rotational direction in the direction of arrow e' in FIG. 2B. Then, when the slide base 7 is slid in the direction of arrow C by the entire stroke, the second B
As shown in the figure, the locking part 39 of the connecting means 38 is engaged with the engaging part 40 of the driven part 27a, and the two wave driving parts 27a, 27b of both pantograph mechanisms 16a, 16b are connected by the connecting means 38. It remains in that state. Therefore,
When the piston rod 32b of the hydraulic cylinder 32 is pushed out in the direction of arrow C in FIG.
Both wave drive parts 27a and 27b of b are connected by the connecting means 38 and are simultaneously moved in the direction of arrow C, both pantograph mechanisms 16a and 16b are extended in the direction of arrow d, and both sleeve support plates 5.6 are moved in the direction of arrow d. They are simultaneously pushed up in the d direction. As a result, the support plates 5.6 on both sleeves can be arranged in series at a height substantially flush with the seat plate 3 in front of the seat plate 3, as shown by solid lines.

Next, referring to FIG. 5, the slide table drive mechanism 44
I will explain about it.

This slide table drive mechanism 44 is connected to the slide table base 12.
A fixed rack 45 is fixed to the top, and a slide rack 4 is fixed to the slide base 7 by a plurality of brackets 46.
7, these two racks 45, a rack and pinion mechanism 49, 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. Then, the cylinder 50a of the hydraulic cylinder 50 is fixed on the slide base 12 by a plurality of brackets 51,
A holder 52 attached to the tip of the piston rod 50b
A pinion 48 is rotatably mounted on a pinion shaft 53.

According to this slide table drive mechanism 44, the hydraulic cylinder 5
When the piston rod 50b of No. 0 is pushed out in the direction of arrow C, the pinion 48 of the rack and pinion mechanism 49 moves to the fixed rack 4.
5, the slide rack 47 and the slide base 7 integrated therewith are moved in the direction of arrow C by the pinion 48 while rotating in the direction of arrow C, and the pinion 48 drives the slide rack 47 in the direction of arrow C (extrusion speed of the piston rod 50b). Therefore, by pushing out the piston rod 50b in the direction of arrow C and pulling it in in the direction of arrow e', the two auxiliary plates 5.6 are moved to the seat plate by the slide base 7. The rack and pinion mechanism 49 can be quickly pulled out in the direction of arrow C to the front of the seat plate 3 from below the seat plate 3 and quickly pulled back in the direction of arrow C.
Move the slide rack 47 by a distance twice the driving distance of arrow C.
Since it can be slid in the 1C' direction, a hydraulic cylinder 50 with a length twice the slide stroke of the slide table 7 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 configuration of the seat plate and back plate drive mechanism 55 will be explained. A bracket 57 is fixed on a stand 56 fixed on the slide table base 12, and a bracket 57 is fixed on the stand 56 fixed on the slide base 12. A pair of rotating arms 58 fixed to the lower back surface
．． 59 is rotatably attached to a rotation fulcrum 60 supported by a bracket 57, and the seat plate 3 and back plate 4 are rotated about the rotation fulcrum 60 in the up and down directions, arrows a and a', and in the front and rear directions, as shown in the arrows. , b' is configured to be rotatable in the force direction.

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, a cylinder 61a is connected to a stand 61 by a pin 62, and a tip of a piston rotor 1b is connected to a tip 58a of a substantially L-shaped rotating arm 58 by a pin 63. And the cylinder 61a
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.

Further, the hydraulic cylinder 68 constituting a second hydraulic cylinder that rotationally drives the back plate 4 in both the front and rear directions of arrows S and b' is configured as a double-acting hydraulic cylinder. That is, in this hydraulic cylinder 68, a cylinder 68a is connected to the stand 56 by a pin 69, one end of an intermediate link 71 is connected to the tip of a piston rod 68b by a pin 70, and the other end of an intermediate link 71 is fixed to the lower rear surface of the back plate 4. It is connected to the tip of the rotating bracket 72 by a pin 73. Note that a guide roller 74 rotatably attached to the outer periphery of the pin 70 is configured to be guided between a pair of upper and lower guide rails 75 fixed to the stand 56 and moved in the direction of the arrow cSc''. , cylinder 68
Hydraulic pressure is alternately supplied and discharged from two hydraulic inlets and outlets 68f and 68g to a pair of hydraulic chambers 68d and 68e provided on both sides of a piston 68c in a.

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 arrow C via the piston 61C, the piston rod 61d is pushed out via the rotary arm 5B. The lever seat Fi3 is pushed up in the direction of arrow a around the pivot point 60. Then, as shown in FIG. 6A, when the hydraulic pressure in the hydraulic chamber 61d of the hydraulic cylinder 61 is discharged from the hydraulic inlet/outlet 61e, the seat plate 3 rotates around the pivot point 60 as shown by the arrow a due to its own weight and the weight of the patient.
'The force direction is lowered.

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 supplied via the piston 68C.
When pushed out in the force direction of arrow C', the back plate 4 is rotated in the direction indicated by the arrow about the rotation fulcrum 60 via the intermediate link 71 and rotation bracket 72. Then, as shown in FIG. 6B, when hydraulic pressure is supplied to the other hydraulic chamber 68e of the hydraulic cylinder 68 from the other hydraulic inlet/outlet 68g, the back plate 4 is rotated about the rotation fulcrum 60 in the direction of arrow b'. .

Next, when changing the patient's position from the sitting position to the supine depression angle state during sitting delivery, as shown in Figure 6B,
The hydraulic cylinder 68 rotates the back plate 4 about the rotation fulcrum 60 in the direction of the arrow b', which is the rearward direction, to create a one-stage motion of tilting it all at once from the elevation angle state shown in FIG. 6A to the depression angle state shown in FIG. 6B. conduct.

At this time, from the time when the back plate 4 is almost flush with the seat plate 3 (horizontal state), the tip 59a of the rotary arm 59 comes into contact with the lower surface 76 of the seat plate 3 from the arrow b' direction, and the The seat plate 3 and the back plate 4 are quickly rotated upward in the direction of arrow a. At that time, the rotating arm 5B, which is rotated together with the seat plate 3 in the direction of the arrow a, simply pulls the piston rotor 1b and the piston 61C of the single-acting hydraulic cylinder 61 in the direction of the arrow C from the hydraulic chamber 61d. Therefore, the seat plate 3 can be smoothly rotated together with the back plate 4 in the direction of the arrow a by the rotary arm 59 without being equally constrained by the hydraulic cylinder 61. Then, by the rotating arm 59, the blue plate 4 and the seat plate 3 are rotated in the direction of the arrow A and the direction of the arrow a, while the blue plate 4 and the seat plate 3 are always connected together in a nearly flush state, and the back plate 4 is There is no possibility that the seat plate 3 will fall down unexpectedly due to an angle of depression greater than its elevation angle.

Here, by rotating the back plate 4 in the direction of arrow b',
Although the seat plate 3 is configured to be rotated in the direction of the arrow a by a rotary arm 59 fixed to the back plate 4 side, the arrow b' of the back vi4
When the back plate 4 and the seat plate 3 become almost flush when rotating 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 back plate Continued rotation of the plate 4 in the direction of arrow b' causes the back plate 4 to rotate the rotating arm 5.
The seat plate 3 may also be configured to be rotated in the direction of the arrow a through the reference numeral 8.

G. 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.
9 and a rotating bracket 72 are fixed to the lower end rear surface of the rotating frame 79, and the rotating bracket 72 is driven by the hydraulic cylinder 68, so that the rotating frame 79
The rotary arm 59 is configured to be rotationally driven in the direction of arrows 1 and 2b', which are the front and rear directions, about the pivot point 79 at the lower end of the rotary arm 59. The back plate 4 is fitted to the front surface of the rotating frame 79 through a recess 80 provided along the back surface of the back plate 4, and the back plate 4 is moved along the front surface of the rotating frame 79 in the vertical direction indicated by the arrow g. It is attached so that it can slide in the g direction.

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. Further, a pair of left and right guide frames 8 that are approximately L-shaped are fixed to the back surface of the back plate frame 82.
5 is opposed to a synthetic resin slippery sheet 86 fixed to two surfaces of a pair of left and right columns 79a by adhesive or the like. Therefore 1. 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 the back plate 4 slides downwardly relative to the rotating frame 79 due to its own weight. It is urged to slide in the direction of arrow g'.

According to this back plate sliding mechanism °78, as shown in FIG.
are rotated in the force directions indicated by arrows b and b', and together with the rotating frame 79, the angle of the back plate 4 in the directions of arrows b and b' is adjusted. At this time, since the back plate 4 is constantly urged to slide in the direction of arrow g', which is the lower side of the rotating frame 79, due to its own weight, the lower end front corner 4a of the back plate 4 is aligned with the rear end upper surface of the seat plate 3. The angle of the back plate 4 in the direction of the force indicated by the arrows 3 and 4 can be adjusted while it is in constant contact with the corner 3a of the back plate 4. That is, when the rotating frame 79 is rotated in the direction indicated by the arrow mark and the lower end 79b of the rotating frame 79 approaches the corner 3a of the seat plate 3, the back plate 4 slides relative to the rotating frame 79 in the direction indicated by the arrow g. When the rotating frame 79 is rotated in the direction of arrow b' and the lower end 79b of the rotating frame 79 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. I will do it.

Therefore, without causing the corner 4a of the back plate 4 to approach or separate from the corner 3a of the seat plate 3, both corners 4a
, 3a are always in contact with each other at one location, the angle of the force direction of the back plate 4 can be adjusted as shown by the arrows 3a and 3a. As a result, when the back plate 4 is raised in the direction indicated by the arrow, the corner 4a of the back plate 4 approaches the corner 3a of the seat plate 3 in the direction of the arrow C, and the patient's buttocks are touched by these corners 4a, 3a. There will be no inconveniences such as accidental pinching or pushing the patient's buttocks in the direction of arrow C by the corner 4a of the back plate 4.

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 tables, but includes examination tables,
It is widely applicable to various medical tables such as operating tables.

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 driving speed of the pinion driven by the drive means, allowing the auxiliary plate to be quickly pulled out from under the seat plate to the front of the seat plate, making it easy to use in emergencies. Able to respond quickly.

Moreover, when the slide rack is made to slide by a distance twice the driving distance of the pinion by the driving means, and the driving means is constituted by a hydraulic cylinder or the like,
Since the length of the hydraulic cylinder can be reduced to 2 times the slide stroke of the slide table, the installation space for the drive means such as the hydraulic cylinder can be reduced to 2 times the conventional size, and the length of the medical table can be reduced to 2 times the length of the slide stroke of the slide table. Miniaturization becomes possible.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and the drawings show an embodiment of the present invention.
Figures 1 to 1C are side views for explaining the configuration and operation of the entire delivery table, and Figures 2A and 2B are side views taken from arrow nn in Figure 3 for explaining the configuration and operation of the auxiliary plate pull-out mechanism. 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 a side view illustrating the structure and operation of the slide platform drive mechanism. figure,
6A and 6B are partially cutaway side views illustrating the structure and operation of the seat plate and back plate drive mechanism, and FIG. 7 is a partially cutaway side view illustrating the structure and operation of the back plate sliding mechanism. ,
FIG. 8 is an enlarged cross-sectional view taken along the line ■--■ in FIG. 7. In addition, in the symbols used in the drawings, 3-・〜・・−−１−−−−−− Seat plate 4−・−・−m
−−−・−−111・−・Backboard 5.6−・−・・・・−
・−Auxiliary plate 7−・−・−・−・−・・−−−−−Slide base 4
4----------...Slide stand drive mechanism 45
−−−−−−−・−・−・−Fixed rack 47−・−111−−・−・−Slide rack 48−−−−−
−・−・−Pinion 49・−1111・・・・−・・−
・Rack and pinion mechanism 50--...----
...A hydraulic cylinder (driving means).

Claims (1)

[Scope of Claims] A medical table having a seat plate and a back plate whose angle can be adjusted with respect to the seat plate, comprising: an auxiliary plate stored under the seat plate; and an auxiliary plate that extends from below the seat plate. A rack and pinion mechanism consisting of a slide base that pulls out the seat plate forward, 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 driving means for rolling the pinion.