DE1056321B - X-ray examination device - Google Patents

Description

GERMAN

The invention deals with an X-ray device with a foldable patient bed. Rack guide and displaceably mounted device parts weightlessly balanced by counterweights.

X-ray devices of this type of various designs are already known. At one execution are arranged between counterbalance for those at the reversible bearing, both lengthways Separate counterweights for auxiliary devices that can be displaced as well as vertically adjustable auxiliary devices used, one of which is longitudinally guided when the bearing is upright, the weight of which is also longitudinally movable Equipment trolley with equipment, the other with the storage turned over the weight of the opposite the equipment trolley compensates for movable auxiliary equipment perpendicular to the table. The total weight of the movable Device parts with counterweights is due to the additional weights to compensate the auxiliary device parts if the deposit is horizontal, it is considerably high.

In another case, attempts are made to solve the problem in that the X-ray examination apparatus with a luminescent screen that can be moved lengthways and perpendicular to the patient bed weightless suspension and a counterweight for weight compensation in the longitudinal direction and to the Compensation in the horizontal position, a compensation spring is also provided, the two said compensating organs are so in operative connection that in the vertical position of the Device counteracts the counterweight of the spring force. Devices based on this principle could turn into in practice do not introduce it once, because the stroke of the device parts due to the spring characteristic is very great is small, and on the other hand, because of the increase in force with the stroke, the movements of the device parts represent a great physical strain for the operator. There is also the fact that. these compensatory means not independently of each other in their size can be chosen arbitrarily, but in must be in a certain proportion in order to achieve a compensatory effect that is reasonably useful in practice. By this condition are dem From the outset, the designer prescribed certain weights for the parts to be moved, so that he cannot develop freely when executing the construction.

To reduce the total weight of the X-ray machine, in particular by reducing the weight the counterweights, these are divided into two weights and arranged in such a way that one part, which serves to compensate for the adjustable auxiliary devices, is movably guided on the other part. the Connection between the device parts and the anein X-ray examination device

Applicant:

Fritz Hofmann
Company with limited liability

for electrical engineering,
Munich 8, Prinzregentenstr. 79

Claimed priority:
Exhibition at the opened on October 11, 1957,

Specialized exhibition on the occasion of the congress
of the German X-ray Society in Frankfurt / M.

Willi Kurt Schwarzer, Erlangen-Bruck,
has been named as the inventor

Other counterweights are carried out by a double-armed lever which is pivotably supported by a holder attached to the auxiliary device by means of a pivot axis and engages on the one hand on the weight part movable perpendicular to the table surface and on the other hand on the support for the auxiliary devices by means of a slide guide. Devices based on this principle have the advantage of having a lower total weight and thus better freedom of movement when the patient bed is in a horizontal position. The disadvantage of the device is that the lever takes up a relatively large space for its movement, that the point of application from which the power transmission originates is fixed when the device parts are moved longitudinally depending on the position of the center of gravity and the guide parts Part by weight changes, so that canting and jamming occur with a large stroke. As a result, X-ray devices of this type only allow a small longitudinal displacement of the device parts. With these devices it is also not possible to let the device parts and the counterweights run past each other in order to achieve a very large stroke ^:.

309 508/10

Claims (5)

Another disadvantage is that the weights are housed together at one point on the device Need to become. This fact does not offer the possibility of cheap constructions of X-ray machines For the practice. '■; The principle of weight balancing described below makes the idea of division use of the weights in a certain way, but further develops this according to the invention by that in the case of X-ray examination devices with device parts weightlessly balanced by counterweights, in which the device parts and the counterweights are connected to one another by rope or chain, Attack at least two ropes, possibly with different directions of force, on the device part and counterweight and that at the ends of one rope, which is laid over a fixed pulley, two more Rollers are attached, over which a second rope guided over a fixed roll, on which the to be compensated Attack forces, is placed in such a way that the roles with weights or equipment parts are in can be adjusted to any possible height and the weights and parts of the device can be adjusted independently of the height adjustment can be moved relative to each other by the second rope. X-ray devices manufactured according to the new design principles are characterized by the most affordable Space utilization with regard to the attachment of the moving parts of the device and the counterweights. It is z. B. possible, the counterweight to balance the weight of the moving parts of the device on a to accommodate a different point of the device than the counterweight, which is used for weight compensation which is used for device parts that cannot be moved at right angles to the table top. Further offers the advantage that devices and counterweights can be driven past each other. Counterweight and Since there are no force components that could result in jamming etc., device parts can be brought close to each other as far as possible. This is achieved by using the power transmission links, in this case chains or ropes can attack practically in the center of gravity. The principle of the invention is shown in Fig. 1. There the rope 5 is placed over the roller 1 the end of which the rollers 2 and 3 are attached. Over these rollers 2 and 3 as well as roller 4, the rope 5 * guided. At the ends of this the weights 6 are attached, the device parts for simplification are shown as a weight. It can also be seen from the illustration - drawn with dashed lines - ■ That the weights 6 can be moved relative to one another with the same position of the Roles 2 and 3. Fig. 2 is only intended to show that the rollers 2 and 3 can be adjusted to each other as desired, without the distance between the weights 6 and the rollers 2 and 3 changing. . The further development of the principle is shown in Fig. 3. The rollers 2 and 3 are no longer attached directly to the ends of the rope 5, but rather on guide parts in which the weights 6 run. These guide parts can be moved in horizontally arranged rails, not shown On the basis of this fact it can be seen that a force occurs in the rope in the direction from the pulleys 2 and 3 to the pulley 4, which force is absorbed by the rope 5. If the rope 5 were not present, then in spite of the attached guide rails to run the weights 6 with guide parts in the direction of the roller 4. This interaction of the two ropes ensures that even if the rope 5 is not designed as an "endless rope, no loosening of the power transmission occurs.
The roller 1 is fastened to the X-ray machine, and the arrangement according to Fig. 3 basically shows the weight arrangement of an X-ray machine with the patient bed lying horizontally at the moment. The roller 4 is also fastened to the X-ray machine via rollers 2, 3 and 4 running rope is tensioned by the weights 6. In order to achieve complete independence of position and for frictional transmission, two endless ropes with corresponding roller arrangements according to Fig. 4 are expediently provided in the two movement circles. The Fig. 4 -provides a certain extent the device with vertical patient support Instead represents., In this case, if the cable which -Runs about the roller in 2, 3 and 4, is not performed as an endless rope, a displacement of the overall - do not weight 6 in both mutually perpendicular directions at right angles to the direction of movement of the rope 5 possible. Guide rails for the guide parts with weights are also in this figure for simplicity not signed. In most of the X-ray machines known to date, the patient lies on a bed, on which it can be moved from the bottom to the head. The moving parts of the device are lengthways to this storage plate and across to it . this and for compression at right angles to the longitudinal axis. It is an old requirement of the X-ray doctor, not only to swivel the patient during the examination, but also to do so still to rotate around its "axis and the movable parts of the device also around the patient to the left or to be able to turn to the right. If these device parts are rotated around the patient, then with the to now built devices on the side shift of the device parts for technical reasons and thus on the setting of a selectable pivot point can be dispensed with; Here too, the Further development of the invention in that the Fühningteil with weight 6 again at right angles the first two directions of movement according to Fig. 5 in the part 8 in which the roller bearings 7 run, is arranged displaceably. This ensures that the device parts when they are around the patient are arranged to pivot, balance them weightlessly and move them in all three levels can. Patent claims: 1 \ X-ray examination device with device parts weightlessly balanced by counterweights, ■ in which the device parts and counterweights are connected to one another by rope or chain, characterized in that at least two ropes optionally with different Kraftrichttmg on Attack device part and counterweight and that at the ends of a rope, which has a fixed Role is placed, two more roles are attached, over which one guided over a fixed role second rope, on which the forces to be balanced act, is laid in such a way that the rollers with weights or device parts can be adjusted to any possible height and the weights and device parts regardless of the height adjustment ment by the second rope, which runs over the rollers (2, 3 and 4), move relative to each other permit. 2. X-ray examination apparatus according to claim 1, characterized in that at least one role are attached to the device part and a roller on the guide part for the counterweight. 3. X-ray examination apparatus according to claim 1, characterized in that the perpendicular to Compensation direction of the second rope occurring force, which is caused by the forces to be compensated z. B. arises when the device is in a horizontal position, also recorded by the first rope will. 4. X-ray examination apparatus according to claim 1, characterized in that the counterweights, which weightlessly balance the device parts as well as the target device and the X-ray tube, in the third Plane, which are offset by 90 ° to the first two directions of movement, can also be moved are so that counter-rotating parallel movements weightlessly balanced regardless of position will. 5. X-ray examination apparatus according to claim 1 and 2, characterized in that to achieve the position independence in a known manner the height adjustment via an endless rope and, as new feature the shifting of the weight at right angles to the direction of force of the first counterbalance a second endless rope to balance the weight, preferably of the target device, is carried out with the device turned over. 1 sheet of drawings © 90S 508/10 4.