JP2016036670A - X-ray diagnostic equipment - Google Patents

Abstract

[PROBLEMS] To provide (i) an X-ray diagnosis in which the mechanism does not become large, (ii) (iii) it is not necessary to know in advance the weight, type and number of detachable parts to be attached and detached, and (iv) no individual calibration is required. An object is to provide an apparatus.
An attachment / detachment detection unit for detecting attachment / detachment of an attachment / detachment component, a rotation detection unit for detecting rotation of a motor, a torque adjustment unit for adjusting torque of the motor, and a rotation of the motor being stopped. And a torque detector 52 for detecting the torque when the brake is released. When the attachment / detachment is detected, the brake is released, and the rotation of the motor 35 due to the imbalance between the vertical movement unit 33 and the counterweight 34 when the brake is released is detected. By adjusting the torque of the motor so that the detected rotation of the motor 35 is stopped and continuously applying the torque when the rotation of the motor 35 is stopped to the motor 35, the vertical movement unit 33 and the counter weight 35 Maintain balance.
[Selection] Figure 2

Description

  The present invention relates to an X-ray diagnostic apparatus for performing X-ray diagnosis, and more particularly to an X-ray diagnostic apparatus having a structure for maintaining balance.

  Conventionally, as this type of device, a fixed part (vertical moving means) that is held movably in the vertical direction from the pulley by a wire, and one end on the opposite side of the fixed part (vertical moving means) side of the wire A weight (counter weight) is connected and is used to balance the weight with the fixed portion (vertical moving means) via the pulley, and the balance between the fixed portion (vertical moving means) and the weight (counter weight) is maintained. There is a structure (see, for example, Patent Document 1). When, for example, a flat panel detection unit is used as the detachable part, the weight balance between the fixed unit, the flat panel detection unit, and the weight is maintained when the flat panel detection unit is fixed to the fixed unit (that is, balanced). The weight is set as follows. Therefore, when the flat detection unit is removed from the fixed part, the weight balance is lost and the fixed part is lifted.

  Therefore, Patent Document 1: Japanese Patent Application Laid-Open No. 2011-041624 is designed to maintain the balance by changing the rotational torque by changing the pulley (pulley) diameter. Specifically, when the flat surface detection unit is removed from the fixed portion, the pulley diameter of the pulley on which the weight is applied is reduced so that the rotational torque of the weight is equal to the rotational torque of only the fixed portion. In addition, as a mechanism for maintaining balance via a pulley, an apparatus that positions an X-ray tube at an arbitrary height in a mechanism having a counterweight is known (see, for example, Patent Document 2).

JP 2011-041624 A Japanese Patent Laid-Open No. 04-096736

However, in the case of the conventional example having the configuration of Patent Document 1: Japanese Patent Application Laid-Open No. 2011-041624 described above, there are the following problems (i) to (iv). That is,
(I) In a mechanism that changes the diameter of a rotating body (pulley) in order to adjust the rotational torque of the weight, it is necessary to secure a large diameter of the rotating body and a diameter changing mechanism. End up
(Ii) It is necessary to know in advance the weight of a detachable part to be attached or detached (for example, a flat detector unit).
(Iii) With respect to a plurality of types of attachment / detachment parts (for example, flat detector units) having different weights, it is structurally difficult to cope with attachment / detachment due to, for example, a difference in size or manufacturer (for example, switching the pulley diameter in multiple stages). difficult),
(Iv) The balance may not be kept fine due to individual differences, and calibration is required for each individual in order to keep the balance accurate.
Problems arise.

  In the case of the above-mentioned Patent Document 2: Japanese Patent Application Laid-Open No. 04-096736, there is no disclosure about a mechanism that gives the torque of the motor when the weight balance is lost, and a countermeasure when the weight balance is lost. Is not taken.

  The present invention has been made in view of such circumstances, and (i) the mechanism does not become large, (ii) (iii) it is not necessary to know in advance the weight, type, and number of detachable parts to be attached and detached. , (Iv) It is an object to provide an X-ray diagnostic apparatus that does not require calibration for each individual.

In order to achieve such an object, the present invention has the following configuration.
That is, an X-ray diagnostic apparatus (referred to as “first invention”) according to the present invention is an X-ray diagnostic apparatus that performs X-ray diagnosis, and includes a pulley, pulley holding means for holding the pulley, and the pulley. Is connected to the other end of the wire opposite to the one end on the side of the up-and-down moving means, and is connected to the up-and-down moving means via the pulley. A counterweight for balancing, a motor that drives the pulley, a brake that stops the rotation of the pulley, and a detachable component that is attached to and detached from the vertical movement means, and detects the attachment and detachment of the removable component Attaching / detaching detecting means, rotation detecting means for detecting rotation of the motor, torque adjusting means for adjusting torque of the motor, and torque detection for detecting torque when the rotation of the motor is stopped. And when the attachment / detachment detecting means detects attachment / detachment, the brake is released, and rotation of the motor accompanying rotation of the pulley due to unbalance between the vertical movement means and the counterweight when releasing the brake The rotation detecting means detects the rotation of the motor detected by the torque detecting means, and the torque adjusting means adjusts the torque of the motor so that the rotation of the motor detected by the rotation detecting means stops. The balance between the up-and-down moving means and the counterweight is maintained by continuously applying torque when the motor stops to the motor.

  [Operation / Effect] According to the X-ray diagnostic apparatus (first invention) according to the present invention, it is provided with the attachment / detachment detection means for detecting the attachment / detachment of the attachment / detachment component, so It is detected by the attachment / detachment detecting means that the weight balance is lost. When the attachment / detachment detecting means detects attachment / detachment in a state where the brake is released (stopping the rotation of the pulley), the pulley is rotated (the pulley is driven as the pulley rotates due to the above-described weight balance being lost (that is, unbalance)). ) The motor also rotates. Therefore, by providing a rotation detecting means for detecting the rotation of the motor and a torque adjusting means for adjusting the torque of the motor, the torque adjusting means is configured to stop the rotation of the motor detected by the rotation detecting means. Adjust. Furthermore, a torque detection means for detecting torque when the rotation of the motor is stopped is provided, and the torque when the rotation of the motor detected by the torque detection means is continuously applied to the motor so that the vertical movement means and the counter are countered. Maintain balance with weights.

  In this way, even if any of the detachable parts is attached or detached, there is no need to lock the movement due to the imbalance between the vertical movement means and the counterweight, and when the movement is permitted in the unbalanced state, the vertical movement means It moves freely in the vertical direction and does not pose a danger to the operator or patient, and can be operated lightly. In addition, when the detachable part is attached or detached from the vertical movement means, it can be freely adjusted to the torque (such as the motor rotation stops) according to the weight, type and number of the detachable parts, so that (ii) (Iii) It is not necessary to know in advance the weight, type and number of detachable parts to be attached and detached. Further, since the rotation of the motor is stopped and the balance is maintained by adjusting the torque, it is not necessary to secure the diameter of the large rotating body and the diameter changing mechanism as in the prior art, and (i) the mechanism does not become large. Further, by adjusting the torque without depending on individual differences, the rotation of the motor is stopped and the balance is maintained, and (iv) calibration for each individual becomes unnecessary. As a result, (i) the mechanism does not become large, (ii) (iii) it is not necessary to know in advance the weight, type, and number of the detachable parts to be attached and detached, and (iv) calibration for each individual becomes unnecessary.

  An X-ray diagnostic apparatus (referred to as “second invention”) according to an invention different from the first invention is an X-ray diagnostic apparatus for performing X-ray diagnosis, and holds a pulley and the pulley. A pulley holding means, a vertical movement means held by a wire from the pulley so as to be movable in a vertical direction, and one end of the wire on the side of the vertical movement means are connected at the other end opposite to the pulley, A counterweight for balancing the weight with the vertical movement means, a motor for driving the pulley, a brake for stopping the rotation of the pulley, and a detachable component attached to and detached from the vertical movement means, A rotation detecting means for detecting the rotation of the motor; a torque adjusting means for adjusting the torque of the motor; and a torque detecting means for detecting a torque when the rotation of the motor stops. The rotation detecting means detects the rotation of the motor accompanying the rotation of the pulley due to the unbalance between the vertical movement means and the counterweight when the brake is released, and the rotation detecting means detects the rotation detected by the rotation detecting means. The torque adjustment means adjusts the torque of the motor so that the rotation of the motor stops, and continues to give the torque when the rotation of the motor detected by the torque detection means stops to the motor, The balance between the vertical movement means and the counterweight is maintained.

  [Operation / Effect] According to the X-ray diagnostic apparatus (second invention) according to the present invention, unlike the first invention, without the attachment / detachment detecting means of the first invention, Do in order. Thus, when the brake is released, the motor rotates (drives the pulley) as the pulley rotates due to the imbalance between the vertical movement means and the counterweight. Therefore, as in the first aspect of the invention, the rotation detection means for detecting the rotation of the motor and the torque adjustment means for adjusting the torque of the motor are provided so that the rotation of the motor detected by the rotation detection means is stopped. Torque adjusting means adjusts the torque of the motor. Further, as in the first aspect of the invention, there is provided torque detecting means for detecting the torque when the rotation of the motor is stopped, and continuously applying the torque when the rotation of the motor detected by the torque detecting means is stopped to the motor. Thus, the balance between the vertical movement means and the counterweight is maintained.

  Thus, unlike the first invention, the torque is adjusted so that the rotation of the motor stops even if the pulley and the motor rotate due to the imbalance between the vertical movement means and the counterweight when the brake is released. The balance is maintained by continuously applying the adjusted torque to the motor. Therefore, even when the brake is released, it is not necessary to lock the movement due to the imbalance between the vertical movement means and the counterweight, and when the movement is permitted in the unbalanced state as in the first invention, the vertical movement means moves in the vertical direction. Therefore, it does not pose any danger to the operator or patient by moving without permission, and light operation is possible. Further, since the torque can be freely adjusted according to the weight, type, and number of the detachable parts when the brake is released (such as the rotation of the motor being stopped), (ii) (iii) as in the first invention There is no need to know in advance the weight, type and number of detachable parts to be attached or detached. Further, since the rotation of the motor is stopped and the balance is maintained by adjusting the torque in the same manner as in the first invention, it is not necessary to secure a large diameter of the rotating body and a diameter changing mechanism as in the prior art. The mechanism does not become large. Further, as in the first aspect of the invention, by adjusting the torque without depending on individual differences, the rotation of the motor is stopped and the balance is maintained, and (iv) calibration for each individual becomes unnecessary. As a result, (i) the mechanism does not become large, (ii) (iii) it is not necessary to know in advance the weight, type, and number of the detachable parts to be attached and detached, and (iv) calibration for each individual becomes unnecessary.

  In the second invention, the operator may instruct the rotation detection means to detect the rotation of the motor simultaneously with the brake release start command. However, the brake release start command and the rotation detection means detect the rotation of the motor. There may be a time lag between the two. Therefore, in the second invention, a timer for monitoring the time when the brake is temporarily released is provided, and the motor associated with the rotation of the pulley due to the imbalance between the vertical movement means and the counterweight when the brake is released by the timer is provided. It is preferable that the rotation detection means detect the rotation. By providing such a timer, a time lag can be prevented, and the balance can be controlled more precisely.

  An X-ray diagnostic apparatus (referred to as “third invention”) according to an invention different from the first invention and the second invention is an X-ray diagnostic apparatus for performing an X-ray diagnosis, comprising a pulley, A pulley holding means for holding the pulley, a vertical movement means that is movable in a vertical direction with a wire from the pulley, and one end on the vertical movement means side of the wire are connected at the other end on the opposite side, A counterweight for balancing the weight with the vertical movement means via the pulley, a brake for stopping the rotation of the pulley, and a detachable part attached to and detached from the vertical movement means. Load detecting means for detecting a change in weight due to attachment / detachment of the tank, a tank for giving a weight change accompanying the vertical movement means and the counterweight, and a tank counterway on the vertical movement means side for fluid in the tank A pump for conveying between the tanks on the side, and when the load detecting means detects a change in weight due to the attachment / detachment of the detachable component, the fluid is driven in a direction to cancel the change in weight between the two tanks by driving the pump. The balance between the up-and-down moving means and the counterweight is maintained by moving the counter.

  [Operation / Effect] According to the X-ray diagnostic apparatus (third invention) according to the present invention, unlike the first invention, the attachment / detachment detection means of the first invention is not provided, and the first / second Unlike the invention, it does not include rotation detection means, torque adjustment means, or torque detection means, but includes load detection means for detecting a change in weight due to attachment / detachment of a detachable component. Thus, the load detection means detects that the weight balance between the vertical movement means and the counterweight has been lost due to the attachment / detachment of the detachable parts. Therefore, unlike the first and second inventions, a tank that changes the weight associated with the vertical movement means and the counterweight and the fluid in the tank are transported between the tank on the vertical movement means side and the tank on the counterweight side. And a pump. Further, when the load detection means detects a change in weight due to the attachment / detachment of the attachment / detachment part, the fluid is moved in a direction to cancel the change in weight between the two tanks by driving the pump, Keep the balance.

  Thus, unlike the first and second inventions, the pump is operated in accordance with the weight change detected by the load detecting means, and the fluid is moved in a direction to cancel the weight change between the two tanks. Maintain balance. Therefore, when any of the detachable parts is attached / detached as in the first invention, it is not necessary to lock the movement due to the imbalance between the vertical movement means and the counterweight, and the movement is permitted in the unbalanced state. In addition, the vertical movement means moves freely in the vertical direction and does not pose a danger to the operator or the patient, and a light operation is possible. Further, since the fluid is moved in accordance with the change in weight, it is not necessary to know in advance the weight, type, and number of detachable parts to be attached and detached as in (ii) and (iii) as in the first and second inventions. Further, since the fluid is moved in accordance with the change in weight and the balance is maintained, as in the first and second inventions, it is not necessary to secure the diameter of the large rotating body and the diameter changing mechanism as in the prior art, and (i) The mechanism does not become large. Further, since the fluid is moved according to the weight change at that time and the balance is maintained without depending on the individual difference, (iv) calibration for each individual becomes unnecessary as in the first and second inventions. As a result, (i) the mechanism does not become large, (ii) (iii) it is not necessary to know in advance the weight, type, and number of the detachable parts to be attached and detached, and (iv) calibration for each individual becomes unnecessary.

According to the X-ray diagnostic apparatus (first invention) according to the present invention, the attachment / detachment detection means for detecting attachment / detachment of the attachment / detachment part, the rotation detection means for detecting the rotation of the motor, and the torque adjustment means for adjusting the torque of the motor. And torque detecting means for detecting torque when the rotation of the motor is stopped. When the attachment / detachment detection means detects attachment / detachment, the brake is released, and the rotation detection means detects the rotation of the motor accompanying the rotation of the pulley due to the imbalance between the vertical movement means and the counterweight when the brake is released. Then, the torque adjusting means adjusts the motor torque so that the rotation of the motor detected by the rotation detecting means stops. The balance between the vertical movement means and the counterweight is maintained by continuing to apply the torque when the rotation of the motor detected by the torque detection means is stopped to the motor. As a result, (i) the mechanism does not become large, (ii) (iii) it is not necessary to know in advance the weight, type, and number of the detachable parts to be attached and detached, and (iv) calibration for each individual becomes unnecessary.
Further, according to the X-ray diagnostic apparatus (second invention) according to the present invention, the rotation detecting means for detecting the rotation of the motor, the torque adjusting means for adjusting the torque of the motor, and when the rotation of the motor is stopped Torque detecting means for detecting torque. The rotation detection means detects the rotation of the motor accompanying the rotation of the pulley due to the imbalance between the vertical movement means and the counterweight when the brake is released. Then, the torque adjusting means adjusts the motor torque so that the rotation of the motor detected by the rotation detecting means stops. Furthermore, the balance between the vertical movement means and the counterweight is maintained by continuing to apply the torque when the rotation of the motor detected by the torque detection means is stopped to the motor. As a result, (i) the mechanism does not become large, (ii) (iii) it is not necessary to know in advance the weight, type, and number of the detachable parts to be attached and detached, and (iv) calibration for each individual becomes unnecessary.
According to the X-ray diagnostic apparatus according to the present invention (third invention), a load detecting means for detecting a change in weight due to attachment / detachment of a detachable part, a vertical movement means, a tank for giving a weight change accompanying the counterweight, and a tank And a pump for conveying the fluid between the tank on the vertical movement means side and the tank on the counterweight side. When the load detection means detects a change in weight due to attachment / detachment of the detachable component, the pump is driven to move the fluid in a direction that cancels the change in weight between the two tanks, thereby balancing the vertical movement means and the counterweight. Hold. As a result, (i) the mechanism does not become large, (ii) (iii) it is not necessary to know in advance the weight, type, and number of the detachable parts to be attached and detached, and (iv) calibration for each individual becomes unnecessary.

It is the schematic of the X-ray diagnostic apparatus which concerns on each Example in case the X-ray imaging unit is a standing X-ray imaging stand. 1 is a schematic diagram and a block diagram of an X-ray imaging unit of an X-ray diagnostic apparatus according to Embodiment 1. FIG. (A) is an example of an up-and-down moving part and a detachable part when the X-ray imaging unit is a standing X-ray imaging stand, and (b) is an example when the X-ray imaging unit and the X-ray tube unit are a roundabout type. It is an example of an up-and-down moving part and a detachable component. 3 is a circuit diagram of a motor control circuit that constitutes a rotation detection unit, a torque adjustment unit, and a torque detection unit of an X-ray imaging unit according to Embodiments 1 and 2. FIG. 6 is a schematic diagram and a block diagram of an X-ray imaging unit of an X-ray diagnostic apparatus according to Embodiment 2. FIG. 6 is a schematic diagram and a block diagram of an X-ray imaging unit of an X-ray diagnostic apparatus according to Embodiment 3. FIG.

Embodiment 1 of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic view of an X-ray diagnostic apparatus according to each embodiment when the X-ray imaging unit is a standing X-ray imaging stand, and FIG. 2 is an X-ray of the X-ray diagnostic apparatus according to the first embodiment. FIGS. 3A and 3B are a schematic diagram and a block diagram of an imaging unit. FIG. 3A is an example of a vertical movement unit and a detachable part when the X-ray imaging unit is a standing X-ray imaging stand, and FIG. FIG. 4 is an example of an up-and-down moving unit and a detachable part when the X-ray imaging unit and the X-ray tube unit are a roundabout type, and FIG. 4 is a rotation detection unit and torque adjustment of the X-ray imaging unit according to the first and second embodiments. It is a circuit diagram of the motor control circuit which comprises a part and a torque detection part. In the first embodiment, including later-described second and third embodiments, an X-ray imaging apparatus will be described as an example as an X-ray diagnostic apparatus.

  When the X-ray imaging unit is a standing X-ray imaging stand, as shown in FIG. 1, the X-ray diagnostic apparatus 1 includes an X-ray tube unit 2, an X-ray imaging unit 3, and a display / operation unit 4. ing. When the X-ray imaging unit 3 is a standing X-ray imaging stand, the X-ray tube unit 2 is constituted by an X-ray tube suspension unit, and supports the X-ray tube 22 so as to be movable along the ceiling. The X-ray imaging unit 3 includes a standing X-ray imaging stand that performs X-ray imaging with the subject M in a standing posture. The X-ray tube unit 2, the X-ray imaging unit 3 and the display / operation unit 4 are electrically connected to each other by a communication cable (not shown). The X-ray tube unit 2 and the X-ray imaging unit 3 are connected by this communication cable. The display / operation unit 4 is configured to be able to communicate with each other. The X-ray diagnostic apparatus 1 corresponds to the X-ray diagnostic apparatus in this invention.

  When the X-ray imaging unit 3 is a standing X-ray imaging stand, the X-ray tube unit 2 has a column 21 that can move along the ceiling and can be vertically expanded and contracted as shown in FIG. And an X-ray tube 22 that is supported and adjustable in orientation. When the X-ray imaging unit 3 is a standing X-ray imaging stand, the X-ray imaging unit 3 is configured to support the subject M in a standing posture as shown in FIG. A specific configuration of the X-ray imaging unit 3 will be described later with reference to FIGS. The display / operation unit 4 includes an operation console 41 that performs overall control of each unit or is operated by an operator, and a monitor 42 that displays an X-ray image.

  When the X-ray imaging unit 3 is a standing X-ray imaging stand, the column 21 of the X-ray tube unit 2 can move along a rail R laid along the ceiling. The rail R is laid along the depth direction of the paper surface of FIG. 1, and the support column 21 is movable along the depth direction. The support column 21 is configured to be extendable and retractable, and the X-ray tube 22 is supported by the support column 21 so that the X-ray tube 22 can be moved horizontally and vertically. The direction of the X-ray tube 22 can be adjusted. Therefore, as shown in FIG. 1, the X-ray tube 22 is moved horizontally / up and down to adjust the direction toward the standing X-ray imaging stand of the X-ray imaging unit 3, and X-ray imaging is performed in a standing posture. Can be done. In addition, although illustration is abbreviate | omitted, when the supine table unit which has the supine table etc. which mounts the subject M in a supine position is arrange | positioned, it faces toward the supine table of the supine table unit. It is also possible to perform X-ray imaging in a supine posture by adjusting the direction by moving the X-ray tube 22 horizontally / up and down.

  The console 41 of the display / operation unit 4 includes a control unit such as a central processing unit (CPU) and an input unit for operation by an operator. The control unit performs overall control of each unit via the communication cable described above. The input unit operates each unit by sending data and commands input from the operator to each unit via the communication cable described above. The monitor 42 of the display / operation unit 4 is configured to display an X-ray image obtained by an X-ray detector 37C described later (see FIG. 3A) via the communication cable described above. .

  In the first embodiment, as shown in FIG. 2, the X-ray imaging unit 3 includes a pulley 31, a pulley holding portion 32 (see also FIG. 1), a vertical movement portion 33 (see also FIG. 1), a counter weight 34, and a motor. 35, a brake 36, and a detachable part 37 are provided. Further, the X-ray imaging unit 3 includes an attachment / detachment detection unit 38, a rotation detection unit 39, a torque adjustment unit 51, and a torque detection unit 52. The pulley 31 corresponds to the pulley in the present invention, the pulley holding portion 32 corresponds to the pulley holding means in the present invention, the vertical moving portion 33 corresponds to the vertical moving means in the present invention, and the counterweight 34 The motor 35 corresponds to the motor according to the present invention, the brake 36 corresponds to the brake according to the present invention, the detachable component 37 corresponds to the detachable component according to the present invention, and the detachment detecting unit 38 corresponds to the counterweight in the present invention. Corresponds to the attachment / detachment detection means in the present invention, the rotation detection unit 39 corresponds to the rotation detection means in the present invention, the torque adjustment unit 51 corresponds to the torque adjustment means in the present invention, and the torque detection unit 52 This corresponds to the torque detection means in this invention.

  The pulley holding means 32 holds the pulley 31 by holding the pulley 31 on the upper portion of the pulley holding portion 32. The up-and-down moving unit 33 is configured to be held by a wire W from the pulley 31 so as to be movable in the up-and-down direction (the direction of the arrow in FIGS. 1 and 3). The counter weight 34 is connected to the other end of the wire W opposite to the one end on the vertical movement portion 33 side, and is configured to balance the weight with the vertical movement portion 33 via the pulley 31. That is, the vertical movement part 33 and the counterweight 34 are suspended by the wire W via the pulley 31, and the balance is maintained.

  A motor 35 is connected to the pulley 31, and the pulley 31 is rotationally driven by the motor 35. A brake 36 is installed to stop the rotation of the pulley 31. Further, a detachable part 37 is mounted on the vertical movement part 33, and the detachable part 37 is attached to and detached from the vertical movement part 33. The attachment / detachment detector 38 detects attachment / detachment of the attachment / detachment component 37.

  The pulley holding part 32 is, for example, a metal support. For example, when the X-ray imaging unit 3 is a standing X-ray imaging stand, the up-and-down moving unit 33 is a bucky unit 33A as shown in FIG. 3A, for example, the X-ray imaging unit 3 and the X-ray tube unit. When 2 is a roundabout type, it is an X-ray tube holding arm 33B as shown in FIG. In the roundabout type, the pulley holding part 32 made of a support is mounted on the wheeled carriage 6.

  The counterweight 34 is, for example, a lead lump. In the present embodiment 1, including later-described embodiments 2 and 3, when the detachable component 37 is mounted on the up-and-down moving portion 33, the counterweight 34 is adjusted so that the weight of the up-and-down moving portion 33 and the detachable component 37 is balanced. Set the weight of. The weight of the counterweight 34 may be set so that the weight of only the vertical movement unit 33 is balanced when the detachable part 37 is removed and only the vertical movement unit 33 is provided. However, during X-ray imaging, the detachable part 37 is often attached to the vertical movement unit 33, and if the weight of the counter weight 34 is set so that the weight of only the vertical movement unit 33 is balanced, It must be locked by the brake 36. Therefore, in order not to lock the brake 36 during X-ray imaging, it is preferable to set the weight of the counterweight 34 so that the weights of the vertical movement unit 33 and the detachable part 37 are balanced. Of course, when the detachable part 37 is removed and only the vertical movement unit 33 is removed during X-ray imaging, the counter weight 34 is adjusted so that the weight of only the vertical movement unit 33 is balanced in order not to be locked by the brake 36 during X-ray imaging. What is necessary is just to set weight.

  The motor 35 is an AC servo motor, for example. The brake 36 is, for example, a permanent electromagnet (permanent electromagnet). When the X-ray imaging unit 3 is a standing X-ray imaging stand, for example, as shown in FIG. 3A, the detachable component 37 includes a handle 37A and a scattered X which are held by the subject M as a patient during X-ray imaging. For example, when the X-ray imaging unit 3 and the X-ray tube unit 2 are of the roundabout type, the line removal grid 37B or the X-ray detector 37C displays or inputs various information as shown in FIG. Tablet PC 37D for this purpose.

  Examples of the X-ray detector 37C include a flat panel X-ray detector, an X-ray film cassette, and an IP cassette. The X-ray detector 37C detects X-rays that have passed through the subject M, outputs an X-ray image, sends it to the monitor 42 of the display / operation unit 4, and displays it. Alternatively, an X-ray image may be printed out. The attachment / detachment detection unit 38 is a contact switch such as a micro switch or a non-contact sensor such as a photo sensor or a magnetic sensor.

  The rotation detector 39 detects the rotation of the motor 35. The torque adjustment unit 51 adjusts the torque of the motor 35. The torque detector 52 detects the torque when the rotation of the motor 35 is stopped. The rotation detection unit 39, the torque adjustment unit 51, and the torque detection unit 52 are configured by a control circuit for controlling the motor 35, and this control circuit is configured by, for example, a motor control circuit shown in FIG. For example, “Mitsubishi servo amplifier MR-J3 series” is used as the motor control circuit.

  In FIG. 4, the motor control circuit includes a position amplifier (denoted by P in FIG. 4), a speed amplifier (denoted by V in FIG. 4), and a current amplifier (denoted by I in FIG. 4) connected in series. A gate drive and a transistor are connected downstream. The transistor is connected to a motor (denoted as M in FIG. 4) through a current detection resistor (denoted by R in FIG. 4). The motor is composed of a tacho generator (denoted by TG in FIG. 4) and a potentiometer (denoted in FIG. 4). In this case, it is connected to POT). The position detected by the potentiometer is fed back to the position amplifier (position feedback), and the motor speed (rotation speed) detected by the tachometer / generator is fed back to the speed amplifier (speed feedback) and detected by the current detection resistor. The current corresponding to the rotating torque is feedback-controlled to the current amplifier (current feedback).

  As described above, in FIG. 4, the tacho generator or potentiometer corresponds to the rotation detection unit 39, and detects the rotation of the motor 35 (see FIG. 2) by the tacho generator or potentiometer. The torque command current amplifier corresponds to the torque adjustment unit 51 and adjusts the torque of the motor 35. The current detection resistor corresponds to the torque detection unit 52 and detects the torque when the rotation of the motor 35 is stopped (here, the current corresponding to the rotation torque).

  Returning to FIG. 2, the control of the motor 35 will be described. At the same time that the attachment / detachment detection unit 38 detects that the attachment / detachment state of the attachment / detachment component 37 has been changed (attached or removed), the weight of the vertical movement unit 33 changes in accordance with the change in the attachment / detachment state. This means that the weight balance between the up-and-down moving part 33 and the counterweight 34 is lost due to the change in weight. The attachment / detachment detection unit 38 detects that the weight balance has been lost, and the brake 36 is released using this detection as a trigger.

  Then, because the weight balance is lost (that is, unbalance), the vertical movement unit 33 moves either up or down, so that the motor 35 rotates simultaneously with the rotation of the pulley 31. Then, the rotation detection unit 39 (in FIG. 4, a tachometer / generator or a potentiometer) detects the rotation of the motor 35. For example, when the speed command in FIG. 4 is set to 0, the motor 35 is feedback-controlled so as not to rotate, and the torque for preventing the rotation is instantaneously determined by the torque adjustment unit 39 (current amplifier in FIG. 4). Quiesce. That is, a balanced state is maintained (balance is maintained). The torque at this time is detected by the torque detection unit 52 (current detection resistor in FIG. 4), and this torque is continuously applied to the motor 35 while being held until the next change in the attachment / detachment state. 34 is maintained in balance, and the stationary state is maintained even when the brake 36 is released.

  According to the X-ray diagnostic apparatus 1 according to the first embodiment, the attachment / detachment detection unit 38 detects that the weight balance between the vertical movement unit 33 and the counterweight 34 is lost due to the attachment / detachment of the attachment / detachment component 37. When the attachment / detachment detection unit 38 detects attachment / detachment in a state where the brake 36 is released (stopping the rotation of the pulley 31), the pulley 31 rotates as the above-described weight balance is lost (that is, unbalance). The motor 35 (which drives the pulley 31) also rotates. Therefore, by providing a rotation detection unit 39 that detects the rotation of the motor 35 and a torque adjustment unit 51 that adjusts the torque of the motor 35, the torque detected so that the rotation of the motor 35 detected by the rotation detection unit 39 stops. The adjustment unit 51 adjusts the torque of the motor 35. Furthermore, by providing a torque detection unit 52 that detects torque when the rotation of the motor 35 is stopped, and continuously applying to the motor 35 the torque when the rotation of the motor 35 detected by the torque detection unit 52 is stopped, The balance between the vertical movement unit 33 and the counterweight 34 is maintained.

  In this way, even if any of the detachable parts 37 is attached or detached, there is no need to lock the movement due to the imbalance between the vertical movement unit 33 and the counterweight 34, and when the movement is permitted in an unbalanced state, The moving unit 33 moves freely in the vertical direction and does not pose a danger to the subject M as an operator or patient, and a light operation is possible. Further, when the detachable part 37 is attached / detached from the up / down moving part 33, it is possible to freely adjust the torque according to the weight, type, and number of the detachable parts (such that the rotation of the motor 35 stops). (Ii) (iii) It is not necessary to know in advance the weight, type and number of the detachable parts 33 to be attached and detached. Further, since the rotation of the motor 35 is stopped by adjusting the torque and the balance is maintained, it becomes unnecessary to secure the diameter of the large rotating body and the diameter changing mechanism as in the conventional case, and (i) the mechanism does not become large. Further, by adjusting the torque without depending on the individual difference, the rotation of the motor 35 is stopped and the balance is maintained, and (iv) calibration for each individual becomes unnecessary. As a result, (i) the mechanism does not increase, (ii) (iii) it is not necessary to know in advance the weight, type, and number of the detachable parts 33 to be attached and detached, and (iv) calibration for each individual is not required.

  In the case of the first embodiment, since the motor 35 and its control circuit (the rotation detection unit 39, the torque adjustment unit 51, and the torque detection unit 52) need only be configured, the apparatus is small and each of the weights is reduced. Even when various different parts (detachable parts 33) are attached / detached, the balance can always be maintained without any problem. As a result, when the operator manually releases the brake 36, the up-and-down moving unit 33 moves freely due to unbalance, causing danger to the operator and the patient, or the operation force increases due to unbalance and the burden increases. Even when unbalanced, the motor 35 supports the unbalanced portion so that the lock can be released.

Next, Embodiment 2 of the present invention will be described with reference to the drawings.
FIG. 5 is a schematic diagram and a block diagram of an X-ray imaging unit of the X-ray diagnostic apparatus according to the second embodiment. The parts common to the first embodiment described above are denoted by the same reference numerals, description thereof is omitted, and illustration is omitted. In the case where the X-ray imaging unit is a standing X-ray imaging stand, the X-ray diagnostic apparatus having the same configuration as that of FIG. 1 and FIG. In the second embodiment, the X-ray tube unit has the same configuration as that of FIG. 3B in the roundabout type.

  In the first embodiment described above, the attachment / detachment detection unit 38 (see FIG. 2) is provided. In the second embodiment, a timer 53 is provided instead of the attachment / detachment detection unit as shown in FIG. That is, in the first embodiment, the trigger for confirming the balance is detection information from the attachment / detachment detection unit 38, whereas in the second embodiment, the trigger is applied by the timer 53 (the brake release and the brake operation are performed periodically). In the case of repeating repeatedly, the timer 53 is periodically triggered). The timer 53 corresponds to the timer in the present invention.

  Also in the second embodiment, the rotation detection unit 39, the torque adjustment unit 51, and the torque detection unit 52 are configured by a control circuit for controlling the motor 35. This control circuit is shown in FIG. 4, for example. Consists of a motor control circuit.

  In the second embodiment, it is not always necessary to maintain the weight balance (that is, the weight is balanced). Brake release by the brake 36 and brake operation are performed in this order. When the brake release and the brake operation are repeated a plurality of times, the brake release and the brake operation by the brake 36 are periodically repeated. The number of times the brake release and the brake operation are repeated is not particularly limited, and the brake release and the brake operation may be performed only once in the order of the brake release and the brake operation, or the brake release and the brake operation may be repeated a plurality of times. .

  The time for releasing the brake is not particularly limited. By setting the brake release time to about 2 seconds, for example, the vertical movement unit 33 does not move up or down, and the motor 35 rotates due to unbalance at the time of brake release, and the rotation is detected by the rotation detection unit. 39 can be detected. However, if the brake release time is too long, the up-and-down moving unit 33 moves up and collides with the pulley 31, or the up-and-down moving unit 33 moves down and collides with the floor surface. On the contrary, if the time is too short, the rotation detector 39 is difficult to detect the rotation of the motor 35. Therefore, the brake release time may be set as appropriate according to the weight of the up and down moving unit 33, the counter weight 34, the detachable part 37, and the like.

  The timer 53 monitors the time when the brake 36 is temporarily released. Then, the rotation detection unit 39 detects the rotation of the motor 35 accompanying the rotation of the pulley 31 due to the imbalance between the vertical movement unit 33 and the counterweight 34 when the brake is released by the timer 53. Thus, the timer 53 triggers.

  When the rotation detection unit 39 detects the rotation of the motor 35, feedback control is performed so that the motor 35 does not rotate, as in the above-described first embodiment, and the torque for preventing the rotation is instantaneously determined by the torque adjustment unit 39. 35 is stationary. That is, a balanced state is maintained (balance is maintained). The torque at this time is detected by the torque detector 52, and by continuing to apply this torque to the motor 35 while holding it until the next change in the attachment / detachment state, the balance between the vertical movement unit 33 and the counterweight 34 is maintained, Even if the brake 36 is released, the stationary state is maintained.

  When the brake release and the brake operation are performed only once in the order of the brake release and the brake operation, the rotation detector 39 detects the rotation of the motor 35 at the time of the brake release and performs feedback control so that the motor 35 does not rotate. The torque for preventing rotation is determined by the torque adjusting unit 39, and each torque is continuously applied to the motor 35 while being held until the next change in the attachment / detachment state. On the other hand, when the brake release and the brake operation are repeatedly performed a plurality of times, the rotation detector 39 detects the rotation of the motor 35 at the time of each brake release so that the motor 35 does not rotate at each detection. Feedback control is performed, torque for preventing rotation is determined by the torque adjustment unit 39 for each detection, and each torque is continuously applied to the motor 35 while being held until the next cycle.

  According to the X-ray diagnostic apparatus 1 according to the second embodiment, unlike the first embodiment described above, the attachment / detachment detection unit 38 (see FIG. 2) according to the first embodiment is not provided, and brake release and brake operation are performed in this order. Do. As a result, when the brake is released, the motor 35 (which drives the pulley 31) also rotates as the pulley 31 rotates due to the imbalance between the vertical movement unit 33 and the counterweight 34. Therefore, the rotation detection unit 39 that detects the rotation of the motor 35 and the torque adjustment unit 51 that adjusts the torque of the motor 35 are provided, as in the first embodiment, so that the rotation of the motor 35 detected by the rotation detection unit 39 is provided. The torque adjustment unit 51 adjusts the torque of the motor 35 so that the motor stops. Further, similarly to the first embodiment, a torque detection unit 52 that detects torque when the rotation of the motor 35 stops is provided, and the torque when the rotation of the motor 35 detected by the torque detection unit 52 stops is transmitted to the motor 35. By continuing to provide the balance, the balance between the vertical movement unit 33 and the counterweight 34 is maintained.

  Thus, unlike the first embodiment, the torque is adjusted so that the rotation of the motor 35 stops even when the pulley 31 and the motor 35 rotate due to the imbalance between the vertical movement unit 33 and the counterweight 34 when the brake is released. Then, the balance is maintained by continuously applying the adjusted torque to the motor 35. Therefore, even when the brake is released, it is not necessary to lock the movement due to the imbalance between the vertical movement unit 33 and the counterweight 34, and when the movement is permitted in the unbalanced state as in the first embodiment, the vertical movement unit 33 It moves freely in the vertical direction and does not pose a danger to the subject M, who is an operator or patient, and enables a light operation. Further, since it is possible to freely adjust the torque according to the weight, type, and number of the detachable parts 37 when releasing the brake (such that the rotation of the motor 35 stops), (ii) (iii) as in the first embodiment. ) It is not necessary to know in advance the weight, type and number of the detachable parts 33 to be attached and detached. In addition, since the rotation of the motor 35 is stopped and the balance is maintained by adjusting the torque in the same manner as in the first embodiment, it is not necessary to secure a large diameter of the rotating body and a diameter changing mechanism as in the prior art. (I) The mechanism does not become large. Further, by adjusting the torque without depending on the individual difference, the rotation of the motor 35 is stopped and the balance is maintained, and (iv) calibration for each individual becomes unnecessary. As a result, (i) the mechanism does not increase, (ii) (iii) it is not necessary to know in advance the weight, type, and number of the detachable parts 33 to be attached and detached, and (iv) calibration for each individual is not required.

  The operator may instruct the rotation detection unit 39 to detect the rotation of the motor 35 at the same time as the brake release start command, but between the brake release start command and the rotation detection unit 39 detecting the rotation of the motor 35. There may be a time lag. Therefore, in the second embodiment, a timer 53 for monitoring the time when the brake 36 is temporarily released is provided, and the pulley 31 is caused by imbalance between the vertical movement unit 33 and the counterweight 34 when the brake is released by the timer 53. The rotation detector 39 preferably detects the rotation of the motor 35 accompanying the rotation of the rotation. By providing such a timer 53, a time lag can be prevented and the balance can be controlled more precisely.

Next, Embodiment 3 of the present invention will be described with reference to the drawings.
FIG. 6 is a schematic diagram and a block diagram of an X-ray imaging unit of the X-ray diagnostic apparatus according to the third embodiment. The portions common to the first and second embodiments described above are denoted by the same reference numerals, description thereof is omitted, and illustration is omitted. When the X-ray imaging unit is a standing X-ray imaging stand, the third embodiment is also an X-ray diagnostic apparatus having the same configuration as that of FIG. 1 and FIG. The X-ray tube unit is a roundabout type, which is an X-ray diagnostic apparatus having the same configuration as in FIG.

  In the first embodiment described above, the attachment / detachment detection unit 38 (see FIG. 2) is provided, and in the first and second embodiments described above, the rotation detection unit 39, the torque adjustment unit 51, and the torque detection unit 52 (see FIG. 2 and FIG. 5). In the third embodiment, instead of the attachment / detachment detection unit, the rotation detection unit, the torque adjustment unit, and the torque detection unit, a load detection unit 54, a tank 55, and a pump 56 are provided as shown in FIG. I have. The load detector 54 corresponds to the load detector in the present invention, the tank 55 corresponds to the tank in the present invention, and the pump 56 corresponds to the pump in the present invention.

  The load detection unit 54 detects a change in weight due to the attachment / detachment of the attachment / detachment component 37. The load detection unit 54 is, for example, a strain gauge. The tank 55 is configured to give a change in weight in association with the up-and-down moving unit 33 and the counterweight 34, and contains a fluid. The third embodiment will be described by taking a liquid as an example of the fluid.

  The tank 55 includes two tanks 55 </ b> A and 55 </ b> B. The tank 55 </ b> A is disposed in the up / down moving unit 33 and the tank 55 </ b> B is disposed in the counterweight 34. A pipe T is arranged between the tank 55A on the up / down moving part side and the tank 55B on the counter weight side, and the pump 56 pumps the liquid in the tank 55 through the pipe T to the tank 55A / counter weight on the up / down moving part side. It conveys between the tanks 55B on the side. The tube T is disposed along the wire W.

  The tank 55 is, for example, a polyethylene tank. The pump 56 is, for example, a plunger pump. The liquid stored in the tank 55 is, for example, a sodium polytungstate aqueous solution. The liquid is not particularly limited, but in consideration of space saving, it is preferable to use a liquid having a specific gravity higher than that of water, and the above-described sodium polytungstate aqueous solution is suitable.

  When the load detection unit 54 detects a change in weight due to the attachment / detachment of the attachment / detachment component 37, the pump 56 is driven to move the liquid in a direction that cancels the change in weight between the two tanks 55A, 55B. The balance between 33 and the counterweight 34 is maintained. That is, the weight balance is maintained by operating the pump 56 according to the weight change detected by the load detection unit 54 and moving the liquid in the tanks 55A and 55B through the pipe T.

  According to the X-ray diagnostic apparatus 1 according to the third embodiment, unlike the first embodiment described above, the first and second embodiments described above are provided without the attachment / detachment detection unit 38 (see FIG. 2) of the first embodiment. Unlike the above, the rotation detection unit 39, the torque adjustment unit 51, and the torque detection unit 52 (see FIGS. 2 and 5) are not provided, but the load detection unit 54 that detects a change in weight due to the attachment / detachment of the attachment / detachment component 37 is provided. As a result, the load detection unit 54 detects that the weight balance between the up-and-down moving unit 33 and the counterweight 34 is lost due to the attachment / detachment of the attachment / detachment component 37. Therefore, unlike the first and second embodiments, the tank 55 that changes the weight accompanying the up and down moving unit 33 and the counterweight 34, and the fluid in the tank 55 (liquid in the third embodiment) are transferred to the up and down moving unit side. And a pump 56 for transporting between the tank 55A and the tank 55B on the counterweight side. Further, when the load detection unit 54 detects a change in weight due to the attachment / detachment of the attachment / detachment component 37, the pump 56 is driven to move the fluid (liquid) between the two tanks 55A, 55B in a direction to cancel the change in weight. Thus, the balance between the vertical movement unit 33 and the counterweight 34 is maintained.

  In this way, unlike the first and second embodiments, the pump 56 is operated in accordance with the weight change detected by the load detection unit 54, and the fluid (liquid) is in a direction to cancel the weight change between the two tanks 55A and 55B. ) To maintain balance. Therefore, even if any of the detachable parts 37 is attached / detached as in the first embodiment, it is not necessary to lock the movement due to the imbalance between the vertical movement unit 33 and the counterweight 34, and the movement is allowed in the unbalanced state. In this case, the vertical movement unit 33 moves freely in the vertical direction and does not pose a danger to the operator or the subject M, and a light operation is possible. Further, since the fluid (liquid) is moved in accordance with the change in weight, it is not necessary to know in advance the weight, type, and number of the detachable parts 33 to be attached and detached (ii) and (iii) as in the first and second embodiments. Further, since the fluid (liquid) is moved in accordance with the weight change and the balance is maintained, as in the first and second embodiments, it is not necessary to secure the diameter of the large rotating body and the diameter changing mechanism as in the prior art. ) The mechanism does not become large. In addition, since the balance is maintained by moving the fluid (liquid) according to the change in weight at that time without depending on the individual difference, (iv) calibration for each individual becomes unnecessary as in the first and second embodiments. . As a result, (i) the mechanism does not increase, (ii) (iii) it is not necessary to know in advance the weight, type, and number of the detachable parts 33 to be attached and detached, and (iv) calibration for each individual is not required.

  In FIG. 6, the motor 35 (see FIGS. 2 and 5) is not provided. Therefore, the pulley 31 can be embedded and held in the pulley holding portion 32. Of course, the pulley 31 may be held on top of the pulley holding portion 32. Further, a motor may be provided, and the vertical movement unit 33 and the counterweight 34 may be moved auxiliary by driving the motor.

  The present invention is not limited to the above-described embodiment, and can be modified as follows.

  (1) In each of the above-described embodiments, the X-ray diagnostic apparatus has been described taking an apparatus that performs X-ray imaging as an example, but is not limited to an apparatus that performs X-ray imaging. A device that maintains a balance (counter balance) with a wire or a counterweight and that performs X-ray diagnosis, for example, irradiates X-rays with a dose that is weaker than that of X-ray imaging, and sequentially generates a plurality of X-ray images. And may be applied to an apparatus that performs X-ray fluoroscopy to display each X-ray image in real time (moving image display).

  (2) In the above-described embodiments, the configurations of the embodiments are independent from each other. However, the configurations of the embodiments may be combined with each other. For example, the modes of the first embodiment and the mode of the second embodiment may be appropriately selected by combining the first and second embodiments. Further, the first and third embodiments may be combined to appropriately select either the mode of the first embodiment or the mode of the third embodiment. Further, the modes of the second embodiment and the third embodiment may be appropriately selected by combining the second and third embodiments. Furthermore, the modes of the first embodiment, the mode of the second embodiment, or the mode of the third embodiment may be appropriately selected by combining the first to third embodiments.

  (3) In each of the embodiments described above, a control unit such as a central processing unit (CPU) is provided independently of the X-ray imaging unit 3 (see FIG. 2, FIG. 5 and FIG. 6). A controller may be incorporated in the line imaging unit 3.

  (4) In the second embodiment described above, a timer for monitoring the time when the brake is temporarily released is provided, and accompanying the rotation of the pulley due to the imbalance between the vertical movement means and the counterweight when the brake is released by the timer. Although rotation detection means (rotation detection unit in the second embodiment) detects rotation of the motor, it is not always necessary to include a timer. If there is no time lag between the brake release start command and the detection of motor rotation by the rotation detection means (rotation detection unit), the operator detects the rotation simultaneously with the brake release start command without providing a timer. The means (rotation detector) may be configured to instruct to detect the rotation of the motor.

  (5) In Example 3 described above, a liquid is taken as an example of the fluid in the tank, and the sodium polytungstate aqueous solution is used as the liquid having a higher specific gravity than water. However, the fluid does not necessarily have to be a liquid, It is not always necessary to use a liquid whose specific gravity is heavier than water. A gas (such as air, rare gas, or nitrogen gas) may be used as the fluid. However, in consideration of space saving as described above, it is preferable to use a liquid whose specific gravity is heavier than water.

  As described above, the present invention is suitable for an X-ray imaging apparatus of a standing X-ray imaging stand and a roundabout X-ray imaging apparatus.

DESCRIPTION OF SYMBOLS 1 ... X-ray diagnostic apparatus 31 ... Pulley 32 ... Pulley holding | maintenance part 33 ... Vertical movement part 34 ... Counterweight 35 ... Motor 36 ... Brake 37 ... Detachable part 38 ... Detachment detection part 39 ... Rotation detection part 51 ... Torque adjustment part 52 ... Torque detector 53 ... Timer 54 ... Load detector 55 ... Tank 56 ... Pump

Claims (4)

An X-ray diagnostic apparatus for performing X-ray diagnosis,
A pulley,
Pulley holding means for holding the pulley;
Up-and-down moving means held movably up and down with a wire from the pulley;
A counterweight connected to the other end of the wire on the side opposite to the one on the side of the up-and-down moving means, and for balancing the weight with the up-and-down moving means via the pulley;
A motor for driving the pulley;
A brake for stopping the rotation of the pulley;
And a detachable component that is detachably attached to the vertical movement means,
Attachment / detachment detection means for detecting attachment / detachment of the attachment / detachment component;
Rotation detection means for detecting rotation of the motor;
Torque adjusting means for adjusting the torque of the motor;
Torque detecting means for detecting torque when rotation of the motor stops, and
When the attachment / detachment detecting means detects attachment / detachment, the brake is released,
The rotation detection means detects rotation of the motor accompanying rotation of the pulley due to imbalance between the vertical movement means and the counterweight when the brake is released,
The torque adjusting means adjusts the torque of the motor so that the rotation of the motor detected by the rotation detecting means stops;
X-ray diagnosis characterized by maintaining the balance between the vertical movement means and the counter weight by continuously applying to the motor the torque when the rotation of the motor detected by the torque detection means is stopped. apparatus. An X-ray diagnostic apparatus for performing X-ray diagnosis,
A pulley,
Pulley holding means for holding the pulley;
Up-and-down moving means held movably up and down with a wire from the pulley;
A counterweight connected to the other end of the wire on the side opposite to the one on the side of the up-and-down moving means, and for balancing the weight with the up-and-down moving means via the pulley;
A motor for driving the pulley;
A brake for stopping the rotation of the pulley;
And a detachable component that is detachably attached to the vertical movement means,
Rotation detection means for detecting rotation of the motor;
Torque adjusting means for adjusting the torque of the motor;
Torque detecting means for detecting torque when rotation of the motor stops, and
Brake release, brake operation in order,
The rotation detection means detects rotation of the motor accompanying rotation of the pulley due to imbalance between the vertical movement means and the counterweight when the brake is released,
The torque adjusting means adjusts the torque of the motor so that the rotation of the motor detected by the rotation detecting means stops;
X-ray diagnosis characterized by maintaining the balance between the vertical movement means and the counter weight by continuously applying to the motor the torque when the rotation of the motor detected by the torque detection means is stopped. apparatus. The X-ray diagnostic apparatus according to claim 2,
A timer for monitoring the time when the brake is temporarily released;
The X-ray diagnostic apparatus, wherein the rotation detecting means detects rotation of the motor accompanying rotation of the pulley due to imbalance between the vertical movement means and the counterweight when the brake is released by the timer. An X-ray diagnostic apparatus for performing X-ray diagnosis,
A pulley,
Pulley holding means for holding the pulley;
Up-and-down moving means held movably up and down with a wire from the pulley;
A counterweight connected to the other end of the wire on the side opposite to the one on the side of the up-and-down moving means, and for balancing the weight with the up-and-down moving means via the pulley;
A brake for stopping the rotation of the pulley;
And a detachable component that is detachably attached to the vertical movement means,
Load detecting means for detecting a change in weight due to attachment / detachment of the attachment / detachment component;
A tank for giving a weight change accompanying the up-and-down moving means and the counterweight;
A pump for conveying the fluid in the tank between the tank on the vertical movement means side and the tank on the counterweight side,
When the load detection unit detects a change in weight due to the attachment / detachment of the attachment / detachment component, the fluid is moved in a direction to cancel the change in weight between the two tanks by driving the pump, thereby An X-ray diagnostic apparatus characterized by maintaining a balance with a counterweight.

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