JPS6148376B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an operating table whose table portion can be turned horizontally or vertically.

Conventionally, in this type of operating table, the structure that enables horizontal or vertical rotation is that the table is mounted on a support table (column base) via a column, and a mechanism for rolling the table within the column is used. The table is mounted on a support base via a spherical seat and an operating rod is vertically attached to the bottom of the table, and the operating rod is driven back and forth. There is a type in which two hydraulic cylinders for vertical rotation are installed vertically, a table is installed at the end of the output rod, and the table is rotated by the operation of the hydraulic cylinders.

However, in the case of a column type, the internal structure is complicated, and since the distance between the column shaft and the table is long, the amount of rotation of the column shaft increases, resulting in poor operability. In the case of the spherical catch type, it is not possible to increase the size (weight) of the table, and the structure and processing of the support are complicated and impractical. Furthermore, in the case of a hydraulic drive type, there are drawbacks such as difficulty in maintaining a fixed position due to leakage of pressure oil.

The present invention has solved these drawbacks, and its feature is that the table can be supported on a support base through a universal joint constructed by combining a rotating frame centered on an X-direction support shaft and a rotating frame centered on a Y-direction support shaft. This is the point posted in . The table is rotated by a screw feed mechanism installed on the support base.

The illustrated embodiment will be described below.

In the external perspective view of Fig. 1, 1 is a table (top plate), 2 is a support base, and 3 is a substrate. UC is a universal joint that is the main part of the present invention, and table 1 is connected to the table through this universal joint UC. It is mounted on the upper end of the support stand 2. That is, as shown in FIGS. 2 and 3, the universal joint UC is installed on a support portion 2R that protrudes from the support base 2, and a table 1 is mounted above the support portion 2R.
is included.

FIG. 4 is a diagram showing a basic configuration suitable for coupling the universal joint UC to an operating table, in which the X-direction support shaft 4 is fixedly supported on the support portion 2R. 5 is Y
It is rotatably attached to a block 6 which is rotatably held on an X-direction support shaft 4 by a direction support shaft, and boss portions 7 are fixedly provided at both ends thereof.

Reference numeral 8 denotes a mounting frame integrally formed with the boss portion 7, above which the table 1 is mounted. Furthermore, a portion 8' of this mounting frame 8 is formed to extend in the direction of the X-direction support shaft 4. Therefore, the block 6 is rotatable around the X-direction support shaft 4, and the mounting frame 8 is rotatable around the Y-direction support shaft 5, so that the Y-direction support shaft 5 rotates with respect to the block 6. Since this is possible, the mounting frame 8 can be rolled horizontally or vertically with respect to the support frame 2R.

Of course, the universal joint UC, which is a main part of the present invention, is not limited to the shape shown in the illustrated example. can also be fixed. Similarly, the Y-direction support shaft 5 can be fixed to the block 6, and in that case, the boss 7 can be fixed to the support shaft 5.
It is necessary to configure it so that it can rotate freely via a bearing or the like.

Mounting frame 8 for universal joint UC as above
When the extension frame 8' is moved in the direction of the arrow, table 1
rolls over on its side around the Y-direction support shaft 5, and
When the extended end 5' of the table 1 is moved in the direction of the arrow, the table 1 is vertically rotated about the X-direction support shaft 4.

Operating rod in Figures 2 and 3 (first operating rod)
9 is connected and suspended to the extension frame 8' of the mounting frame 8, and the operating rod (second operating rod) 10 is connected and suspended to the extended end 5' of the support shaft 5, so that both operating rods 9, 10 As shown in FIG. 4, each frame portion 5', 8' is moved in the direction of the arrow by a mechanism to be described later, thereby causing the table 1 to be turned horizontally or vertically as required.

The vertical reciprocation of both operating rods 9 and 10 is performed by a drive mechanism mainly consisting of a screw feeding mechanism, as shown in FIG. Although FIG. 5 shows a drive mechanism for the operating rod 10, a similar mechanism is also connected to the first operating rod 9, and each of these drive mechanisms is installed on the support base 2. In the illustrated example, each drive mechanism is installed inside the support base 2, and the operating rods 9 and 10 protrude upward from the frame portion thereof.

Inside the support stand 2 is a bone frame 2 that forms the base of the support part 2R.
H, and an electric motor 11 is fixed to this frame 2H. The rotational output of the electric motor 11 is inputted to a reducer 14 via a belt 12 and a pulley 13, the direction is changed by 90 degrees, the speed is reduced, and the output is outputted from an output shaft 15. The output of the output shaft 15 is transmitted to the threaded rod 18 via a connecting portion 17 supported by a bearing portion 16 .

On the other hand, a nut 19 into which the screw rod 18 is screwed is fixed to the lower end of the actuating rod 10, which is stopped from rotating, so that the actuating rod 10 is displaced by the rotation of the screw rod 18. As the threaded rod 18 rotates forward and backward, the operating rod 10 reciprocates up and down.
The threaded rod 18 and nut 19 constitute a precision screw feed mechanism in which a precision lead thread is carved, or a ball screw feed mechanism. Therefore, the displacement of the operating rod 10 can be controlled precisely, and the displacement of the screw rod 1
8 has a locking function when the reducer 15 and electric motor 11 are not in operation, so that the threaded rod 18 does not rotate when unnecessary. It is more effective to construct an irreversible transmission system by interposing a worm reduction mechanism in this rotational drive system. 20 is a connecting pin.

As described in detail above, the first feature of the operating table of the present invention is that the table is mounted on a support base via a universal joint formed by intersecting the X-direction support shaft and the Y-direction support shaft. The second feature is that this universal joint is rotated via an operating rod that is connected to the rotating frame in each direction and hangs down, and the third feature is that the reciprocating movement of this operating rod is controlled. This is done by using a screw feeding mechanism.

The present invention includes various modified embodiments other than the illustrated embodiments. First, in addition to the embodiment shown in FIG. 4, the universal joint may have a configuration in which, for example, the X-direction support shaft and the Y-direction support shaft are three-dimensionally opposed to each other so that they are not on the same plane.

The configuration in which each operating rod is directly connected and suspended from the rotating frame of the universal joint is an essential requirement for simplifying the structure and improving operability by allowing the table to roll with little displacement of the operating rod. frame part of the joint)
Which part of the throat to connect and hang can be selected depending on the shape of the universal joint, and is not limited to the illustrated example.

Regarding the screw feed mechanism, in addition to the embodiments described above, a screw rod may be connected to the operating rod, and a nut may be screwed onto the screw rod to rotate the nut at a fixed position. Both in this modification and in the illustrated example, the connection point is slightly displaced in the horizontal direction due to the rotation of the universal joint in the X and Y directions. However, it is necessary to provide such means. The screw rod may be rotated by a manual handle. The shapes of the table and support table of the operating table are also not limited to the illustrated example. Furthermore, the present invention can be implemented on various other operating tables.

As described above, the operating table of the present invention has a very simple structure and is highly economical as an operating table that can be turned horizontally or vertically. Compared to the hydraulic cylinder type, it can be held in a predetermined position more reliably, and it is also easier to operate than the column type. Furthermore, since the universal joint can be inserted in a vertically narrow space, there is the advantage that it can be made more compact.

[Brief explanation of the drawing]

1 is a perspective view of the overall appearance of one embodiment of the present invention, FIG. 2 is a view seen from the direction of FIG. 1, FIG. 3 is a view seen from the direction of FIG. 1, and FIG. 4 is a view of the present invention. FIG. 5 is a diagram showing the basic configuration of the universal joint, and FIG. 5 is a diagram showing the specific configuration of the operating mechanism. DESCRIPTION OF SYMBOLS 1...Table, 2...Support stand, 2R...Support part, 2H...Bone frame, 3...Substrate, 4...X direction support shaft, 5...Y direction support shaft, 5'...End part , 6...Block, 7...Boss part, 8...Mounting frame, 8'
...Extension frame, 9...First operating rod, 10...Second operating rod, 11...Electric motor, 12...Belt, 13...
...Pulley, 14...Reduction gear, 15...Output shaft, 1
6... Bearing portion, 17... Connection portion, 18... Screw rod, 19... Nut, 20... Connection pin.

Claims (1)

[Claims] 1. The table is mounted on a support base via a universal joint configured by combining a first rotation frame centered on the X-direction support shaft and a second rotation frame centered on the Y-direction support shaft, and the first rotation frame a first operating rod whose upper end is connected and suspended from the second rotating frame; a second operating rod whose upper end is connected and suspended from the second rotating frame; and a second operating rod which is installed on the support base and drives the first operating rod up and down. The table is provided with a first screw feeding mechanism and a second screw feeding mechanism that is installed on the support base and drives the second operating rod up and down, and the table is turned horizontally or vertically by the first and second screw feeding mechanisms. An operating table characterized by: