JPH066146B2 - Operating table - Google Patents

Description

Detailed Description of the Invention A. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a basic structure for driving an operating table, for example, a table of a surgical operating table for raising, lowering, turning over, and turning over.

B. 2. Description of the Related Art An operating table has a table on which a patient is placed, and the table is configured to be able to raise, lower, roll over, and roll the table up and down so that the patient can obtain a required position according to the contents of the surgery.

In this structure, as shown in Japanese Patent Publication No. 61-837, "Operating table", a lifting mechanism is hung vertically on a base, and the uppermost stage of this lifting mechanism is connected to a table through a horizontal rolling mechanism and a vertical rolling mechanism. It is a structure that does. A screw feed mechanism and a hydraulic cylinder mechanism are used as the lifting mechanism, and the horizontal and vertical rotation mechanisms employ a system in which various actuators generate a rotational force around a rotary branch shaft. These three mechanisms are installed exclusively so as not to interfere with each other.

C. DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention It is necessary to install the respective mechanisms for raising, lowering, rolling, and vertically rolling so as not to interfere with each other, and a certain interval is required, and a large amount of power is required for each, and the structure is complicated. Becomes Therefore, when the operating table becomes large, the lowest height to the table also rises, which is against the lowering of the operating table, and the table width is large, making it difficult to use and increasing the number of parts and the number of processing steps, which is expensive. Becomes

The present invention is intended to provide an operating table that solves such conventional problems.

D. Means for Solving the Problems A base is arranged on the lower side of the central portion of the table, and at least three expansion / contraction means capable of expanding / contracting the length separately are erected on the base and one expansion / contraction means is installed. Displacement is arranged on the side of a straight line connecting the other two expansion / contraction means, and the upper end of each expansion / contraction means supports the lower surface of the central portion of the table via a universal joint. In this case, the expansion / contraction means has the same function as the conventional lifting mechanism.

E. Function When the lengths of the respective expansion / contraction means are made different from each other, the heights from the base to the respective connection points of the table are different. This height difference substantially realizes horizontal and vertical rolls of the table. The universal joint functions as a means of guaranteeing the appearance of this posture.

F. EXAMPLES The present invention will be described below with reference to examples shown in the drawings.

FIG. 1 is a diagram schematically showing the features of an operating table according to the present invention. (A) is a plan view, (B) is a front view, and (C) is (B).
It is the side view which looked at the figure from the right side.

In these figures, reference numeral 1 is a base plate, that is, a base portion, which is a base portion for mounting the operating table on the floor surface. On this base 1, three expansion / contraction means LE, RE, SE are erected. Although the structure of the expanding / contracting means will be described later, the expanding / contracting means LE and RE are located in the central portion of the base 1 and are erected on the left and right, while the expanding / contracting means SE is located on the side of the LE. That is, as is clear from FIG. 7A, the three expansion / contraction means are arranged in an L-shape and stand upright.

Reference numeral 2 denotes a table (table top) on which the patient is placed, which is connected to the upper end portions of the expansion / contraction means LE, RE, SE by hook-shaped universal joints FJ and ball-shaped universal joints BJ, BJ, respectively. . These universal joints will also be described later.

The characteristic configuration of the operating table according to the present invention is as described above, and the length of each expansion / contraction means LE, RE, SE is set to a desired length (height) so that the table is lifted, rolled over,
A vertical roll is performed.

That is, each expansion / contraction means LE, RE, SE has a fixed frame part 3 and a movable frame part 4 as shown in FIG. 2 and FIG. 3, and the fixed frame part 3 is fixedly installed on the base 1 and movable. The upper end of the frame is connected to the table 2 via universal joints FJ and BJ. An expansion / contraction mechanism is interposed between the fixed frame portion 3 and the movable frame portion 4 inside. The expansion and contraction mechanism is, for example, sixth
Examples can be given as shown in the figure. That is, FIG. 6 shows a screw feed mechanism as a basic structure, in which 14 is a screw rod fixedly planted in the base plate 12 integrated with the fixed frame portion 3, and 15 is screwed into the screw rod 14. These nuts form a screw feed mechanism.
The nut 15 has a certain length in the upper part, and a rotor 16 constituting an electric motor is fixedly held in the middle part of the nut 15. 17
Is a coil energized via the lead wire 23, and
6 constitutes an electric motor, and generates a relative rotational driving force between them. In the case of the illustrated example, the coil 17 is fixedly held by the upper and lower cylinders 18 via holding members 24 and 25. The upper and lower cylinders 18 are fixed at their upper ends to the upper plate 13 which is integral with the movable frame 4, and move up and down with respect to the fixed frame 3.
The upper and lower cylinders 18 and the fixed portion 3 are combined in a quadrangular horizontal section so that they do not rotate. Therefore,
The rotor 16 is rotated by the operation of the electric motors 16 and 17, and the nut 15 is rotationally driven to move the nut 15 up and down with respect to the screw rod 14. Since the nut 15 side is rotatably supported by the fixed sides 24, 25 via angular contact type ball bearings 19, 20, the vertical displacement of the nut 15 is prevented by the fixed side holding members 24, 25 and the spacer 21. Is transmitted to the fixed plate 22 of the upper and lower cylinders 18 to move the upper and lower cylinders 18 up and down.

The expansion / contraction means shown in FIG. 6 is an example in which a screw feed mechanism is a basic structure and an electric motor as a rotational drive source thereof is coaxially arranged to achieve compactness, but of course the invention is not limited to this example. Not something. That is, it may be configured by a hydraulic cylinder not having a screw feed mechanism as a basic configuration, or a mechanism that expands and contracts by a link mechanism. In this way, the telescopic mechanism uses electric force or hydraulic pressure and can automatically and automatically adjust to the desired telescopic length, but it can be extended or shortened to the desired length by operating the remote control switch. Is desirable. By such an operation, the movable frame portion 4 moves back and forth with respect to the fixed frame portion 3, and the length thereof expands and contracts as a whole.

On the other hand, the universal joints FJ and BJ are also shown in FIG. 4 and FIG.
Are connected so that the table 2 can be turned over and turned down. A hook-shaped universal joint FJ is attached to the upper end of the movable frame portion 4 of the expansion / contraction means LE.
This is illustrated in FIG. Hook-shaped universal joint F consisting of two hook frames 5 and 8 and a pin 6 combined in a cross shape
In J, the hook frame 5 is attached to the upper end of the movable frame 4 with the attaching screw 7, and the hook frame 8 is fixedly connected to the lower surface of the table 2. The hook 8 is extended and contracted by the pin 6 to extend and retract the LE.
Can be tilted in either the X direction or the Y direction with respect to the major axis.

On the other hand, as shown in FIG. 3 and FIG. 5, the ball-shaped universal joint BJ has a joint frame 9 and a rod 11 having balls at both ends.
The joint frame 9 is fixed to the upper end surface of the movable frame 4 of the expansion / contraction means SE and RE, and the joint frame 10 is fixed to the lower surface of the table 2. In the case of this universal joint, the joint frame 10 can be tilted in all directions, so that the table 2 can be freely rolled and rolled vertically. The ball-shaped universal joint shown in FIG. 5 is schematically shown, and a specific configuration in consideration of manufacturing the same is shown in FIG. The joint frame 10 is a two-piece body 10.
The U and 10D are connected by screws 26. The ball B and the rod 11 are connected via a pin 27. Of course, it is not limited to these figures.

As shown in FIG. 1 (A), the three expansion / contraction means LE, RE, SE are arranged such that LE and RE are erected at regular intervals on a line L of the center of the base 1 and the table 2 in the longitudinal direction, SE
Is erected at a position deviated laterally from the center line L.

Since the operating table according to the present invention is configured as described above, the vertical movement, the horizontal rotation, and the vertical rotation of the table 2 are realized as follows.

(1) Lifting operation of the table The table is lifted by expanding all the three expansion / contraction means LE, RE, SE by the same amount.

(2) Table lowering operation The table is lowered by shortening all the three expansion / contraction means LE, RE, SE by the same amount.

(3) Ascending / descending horizontal movement of the table in FIG. 1 (C) The two expanding / contracting means LE and RE are left unchanged, and the expanding / contracting means S is moved.
This is done by shortening only E.

(4) Downward rightward rollover operation of the table in FIG. 1 (C) This is performed by shortening the two expansion / contraction means LE and RE and leaving the expansion / contraction means SE as it is.

(5) Vertical upward tilting operation of the table in FIG. 1 (B) This is performed by shortening the two expansion / contraction means LE and SE and leaving the expansion / contraction means RE as it is.

(6) Vertical downward movement of the table in FIG. 1 (B) The two expansion / contraction means LE and SE are left unchanged, and the expansion / contraction means R is used.
This is done by shortening only E.

As described above, due to the arrangement of the three expansion / contraction means in the L-shape, the four operations of horizontal and vertical rotation can be achieved only by shortening the expansion / contraction means, apart from the lifting operation.

The present invention is not limited to the illustrated examples, and includes various modified embodiments.

First, the number of expansion / contraction means is at least three, and it is also possible to set it to four or more. As a practical example other than three, four are conceivable, but in this case, the number of expanding / contracting means for expanding / contracting for each operation is larger than three.
The expansion / contraction means may be arranged at each apex of a triangle, instead of being L-shaped as in the embodiment. However, in this case, it is necessary to operate two or more expansion / contraction means for each movement of the table.

Further, the horizontal and vertical rolls can be performed not only by shortening the predetermined expansion / contraction means but also by extending the predetermined expansion / contraction means. However, since the expansion / contraction means is loaded, the shortening operation is more efficient.

The structure of the expanding / contracting means includes the screw feed mechanism, the hydraulic cylinder mechanism, and the link mechanism as described above. However, a rack and pinion mechanism can be used in addition to the above, and any expanding / contracting means that can withstand a desired load can be used. It may be one.
Further, in the illustrated example, the fixed example is connected to the base and the movable side is connected to the table side, but this can also be connected in the reverse form.

The universal joint is not limited to the hook-shaped joint and the ball-shaped joint as illustrated. As shown in FIG. 3 and FIG. 5, the universal joint using the rod and the ball of a certain length is used because the expansion and contraction means LE and SE, and the distance between LE and RE are apparent from the table 2 at the time of rollover and rollover. This is to allow a slight amount of change, but any universal joint may be used as long as it can allow a change in the distance (spacing) between the supporting points due to each operation of the table. All could be ball joints, but in this case it would be necessary to add means to ensure the stability of the table.

In the illustrated example, the table is shown as a single piece, but this is only a schematic illustration of the table, and in reality, it has a plurality of table tops. The supporting base frame will be supported. The present invention is not limited to a surgical table, but can be applied to operating tables for other purposes.

G. EFFECTS OF THE INVENTION In the operating table of the present invention, at least three expansion / contraction means are arranged between the base and the table in an L-shape, and the table is supported at its central portion via a universal joint. It is possible to reduce the number of the
The drive mechanism of the table can be simplified and downsized. Since the expanding and contracting means can use the same mechanism and has a large effect on mass production, the expanding and contracting means can be manufactured at low cost, and the overall weight of the operating table can be reduced.

Further, since the expansion / contraction means supports the table at its central portion, the table can be divided into, for example, three parts in the longitudinal direction so that the front and rear portions can be undulated with respect to the central portion. There is also an advantage that the utility value can be increased.

[Brief description of drawings]

FIGS. 1 (A), (B) and (C) are diagrams schematically showing the entire operating table of the present invention, FIGS. 2 and 3 are diagrams showing the structure of an expansion / contraction means and a universal joint, FIG. 4 and FIG. FIG. 5 is a diagram showing a configuration of the universal joint, FIG. 6 is a diagram showing an example of a specific configuration of the expansion / contraction means, and FIG. 7 is a diagram showing an example of a specific configuration of the ball-shaped universal joint. 1 ... Base, 2 ... Table, 3 ... Fixed frame part, 4 ... Movable frame part, 5, 8 ... Hook frame, 6 ... Pin, 9, 10 ... Joint Frame, 11 ... Rod, LE, RE, SE ... Expansion / contraction means, FJ ... Hook-like universal joint, BJ. ． ． Ball-shaped universal joint, L ... center line, B ... ball.

Claims (1)

[Claims] 1. A base is arranged below the center of the table,
On this base, at least three expansion / contraction means which can be expanded / contracted respectively in length are erected, and one expansion / contraction means is displaced and arranged on the side of a straight line connecting the other two expansion / contraction means,
An operating table characterized in that the lower end of the central portion of the table is supported by the upper ends of the respective expansion and contraction means via a universal joint.