DE8612324U1 - X-ray diagnostic device with a tilting table - Google Patents

Description

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f ( ") Siemens Aktiengesellschaft Our reference ^V Berlin and Munich VPA 86 P 3 1 5 2 DE

X-ray diagnostic device with a tilting table

The invention relates to an X-ray diagnostic device with a tilting table that can be tilted from the horizontal position to both sides, one of which by 90°, in which the tilting table is attached to a table frame that is provided on its outside with circular drive tracks into which a drive wheel engages and in which two guide rails are arranged on each side of the table frame, into which two fixed guide pins engage in the horizontal position and which are designed and directed in such a way that when the tilting table is adjusted from the horizontal position, one guide pin leaves its guide rail and the lower end of the table frame is raised so far that it is above floor level.

An X-ray diagnostic device of this type allows a tilting movement of, for example, 90" on one side of the horizontal position and 30" on the other side with little structural effort. The guide rails in a known X-ray diagnostic device of this type are designed to be straight, so that the tilting speed varies at a constant speed of the tilting motor.

The invention is based on the object of developing an X-ray diagnostic device of the type mentioned at the beginning in such a way that an essentially uniform tilting speed is achieved.

This object is achieved according to the invention in that the guide rails assigned to the foot end are curved towards the table top* Even with a circular curve

Tp 2 Ler / 29.04.1986

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µ z· - ·' VPA 86 P 3 1 5 2 OE f mung around a point near the foot end of the table top, an approximately uniform tilting speed can be achieved at a constant speed of the tilting motor* An exactly uniform tilting speed can be achieved by an appropriate curve shape.

The invention is explained in more detail below using an embodiment shown in the drawing.
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Fig. 1 shows an X-ray diagnostic device according to the invention in a side view, and

( Fig. 2 and 3 the X-ray diagnostic device according to Figure

1 in different tilting positions.

The device according to Figure 1 has a tilting table 1, which is mounted on a table frame 2 so that it can be moved longitudinally by a motor. Below the tilting table 1 there is an X-ray tube (not shown) which is attached to a carrier 3, which carries an X-ray image intensifier 4 with a downstream television camera 5 and a sheet film camera 6 above the tilting table 1. In the horizontal position of the tilting table 1 shown in Figure 1, the table frame 2 with guide rails, of which the guide rails 7, 8 are visible in Figure 1, rests on guide pins, of which the guide pins 9, 10 are visible in Figure 1. The guide pins 9, 10 are attached to stationary bearing parts arranged on the side of the table frame 2, of which the bearing part 11 is visible in Figure 1.

The table frame 2 is provided on its outside with two circular drive tracks, of which the drive track 12 is shown in Figure 1*. A gear wheel 13, which can be rotated by a motor, is in engagement with the drive track 12, which is designed as a chain.

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··.'..·'\>'j'L·'""VPA B6P 3 1 5 2EN C) Parts 7 to 13 are not symmetrical on the device.

visible, corresponding parts are arranged, i.e. that symmetrically to both device sides there is a drive track corresponding to 12, a drive wheel corresponding to 13, two guide rails corresponding to 7, 8 and two guide pins corresponding to 9, iO forehands.

If the tilting table 1 is to be raised from its horizontal position, in which the table frame 2 is supported by the guide rails 7, 8 on the guide pins 9, 10, into a vertical position, i.e. rotated by 90", the drive motor is switched on, which rotates the shaft 15 and thus the drive wheel 13. The table frame 2 with the tilting table 1 moves clockwise and the guide pins 9 leave the guide rails 7.

During this tilting movement, the table frame 2 then rests with the guide rails 8 on the guide pins 10. By guiding the guide pins 10 in the guide rails 8, it is achieved that the tilting table 1 can be erected into the position shown in Figure 2 without its lower end hitting the ground.

If the tilting table 1 is to be pivoted anti-clockwise from its horizontal position shown in Figure 1 (Fig. 3), the guide pins 10 leave the guide rails 8 in an analogous manner and the guide is provided by the guide pins 9 in the guide rails 7. The drive wheels 13 rotate in the opposite direction to their rotation when erecting into the position shown in Figure 2. The table frame 2 is pivoted with the tilting table 1 anti-clockwise into the head-down position shown in Figure 3, in which the tilting table 1 forms an angle of approximately 30° with the floor.

When adjusting the tilting table 1 from the horizontal position

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f j according to Figure 1 into the end positions according to Figures 2 and 3. Accordingly, one of the guide pins 9, 10 leaves its guide track 7, 8 and the end of the cerate closest to the ground is raised so far that it lies above the floor level, the table frame 2 being carried by the respective guide pins 9, 10 in the guide rails 7, 8.

From Figures 1 to 3 it can be seen that the guide rails 8 located near the foot end of the table top 1a are curved around a point that is close to this foot end. The curvature is in the shape of a circular arc. This ensures that, at a constant speed of the drive motor, an approximately uniform tilting speed is achieved when tilting by 9ID*. The tilting speed is exactly uniform if a suitable curved shape of the guide rails 8 is selected.

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Claims (2)

·..·,..' '^'St-" \.'VRfl 86&Rgr; 3 1 5 2 DE -P»fcefi£frn sp ruche 1. X-ray diagnostic device with a tilting table (1) which can be tilted from the horizontal position to both sides, one side by 90", in which the tilting table (1) is fastened to a table frame (2) which is provided on its outside with circular drive tracks (12) into which a drive wheel (13) engages and in which two guide rails (7, 8) are arranged on each side of the table frame (2), into which two fixed guide pins (9, 10) engage in the horizontal position and which are designed and directed in such a way that when the tilting table (1) is adjusted from the horizontal position, one guide pin (9, 10) leaves its guide rail (7, 8) and the lower end of the table frame is raised so far that it is above floor level; characterized in that the guide rail (8) assigned to the foot end extends towards the table top (la). is curved. 20 2. X-ray diagnostic device according to claim 1, characterized in that the curved guide rail (8) is curved in a circular arc around a point located near the foot end of the table top (la).