JPS642726Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an X-ray imaging device, and in particular, includes a mechanism for raising and lowering a fluoroscopic imaging table, and a safety mechanism to eliminate accidents where the top plate gets caught when the fluoroscopic imaging table is raised. The present invention relates to an X-ray imaging apparatus equipped with the following.

In general, an X-ray imaging apparatus equipped with a rotation mechanism for a fluoroscopic imaging table (hereinafter referred to as a top table) as described above has a function to slide the top plate up and down and left and right, in addition to rotating the top plate. There is. For example, if you want to stand up the tabletop after rotating the tabletop to make it horizontal and sliding the tabletop downwards (toward the subject's feet) to take a picture, the tabletop is An upward slide control is also performed. These controls are performed by a micro switch that is attached to the top pedestal and detects the rotation angle of the top pedestal. However, if the micro switch is not detected or the micro switch line is disconnected, the top The tabletop stand is controlled to stand up while the plate is sliding downward. According to this, the top plate may come into contact with the floor surface, which may not only destroy the apparatus but also, in severe cases, cause harm to the subject. Therefore,
In order to prevent the top plate from colliding with the floor when the position detection function is malfunctioning, the failure is detected, the motor M for driving the top plate, etc. is stopped, and the top plate is restarted. An X-ray imaging apparatus has been considered in which the motor M is not driven at all until a drive command to the plate is given.

However, in such an X-ray imaging device, in order to finally raise the top plate, the top plate must first be slid to a safe position after stopping the motor M to prevent the top plate from colliding with the floor. After that, the operator had to go through the operation procedure of raising the top plate, which resulted in a problem that the operability was poor.

In view of the above-mentioned shortcomings of the conventional technology, the present invention prevents the accident of the top board getting caught due to a circuit failure when raising the top board, and also fully automates the operation that ultimately leads to the raising of the top board. The purpose of the present invention is to provide an X-ray imaging device that is easy to use and has excellent operability.

The present invention is designed to detect when the switch for detecting the raising and lowering of the tabletop stand and the sliding position of the tabletop installed on the tabletop stand does not work, or when the wiring of the switch circuit is disconnected. If the slide position of the board is such that the top board would collide with the floor if the top board was left upright, the top board will be automatically moved to a safe position before the top board collides with the floor. The device slides and then automatically stands up, achieving the above purpose. Specific examples of the present invention will be shown and explained in detail below.

Fig. 1 shows an external view of the X-ray imaging apparatus according to the present invention, in which the top plate base can be raised and lowered freely. 1 is the main body base, and 2 is the top plate mounted on the main body base so that it can be raised and lowered. , 3 is a top plate that can be slid along the longitudinal direction of the top plate stand 2; 4 is a film device that moves in the longitudinal direction of the end of the top plate stand 2 and is installed facing an X-ray tube (not shown); The drive mechanism of this X-ray imaging device is the second
As shown in the figure. That is, the rotating shaft 6 of the top plate 2 attached to the main body base 1 via the bearing 5
A pulley 7 and a cam 8 are attached to the main body base 1, and a motor 9 installed on the main body base 1 and the pulley 7 are connected by a belt 10. A micro switch 11 is provided on the rotational path of the cam 8, and is activated when the top plate 2 reaches the upright rotation.
This is a switch for returning the top plate 3 to its original position after it has been slid in the direction of arrow A in FIG. 1, and starts a motor (not shown) to slide the top plate 3 in the direction of arrow B in FIG.

To explain the operation of the top plate 2 and the top plate in the apparatus shown in Figs. 1 and 2 in more detail with reference to Fig. 3, the top plate 2 which is in the upright position is tilted down, and when it is placed in a horizontal position, the top plate 2 is placed in a horizontal position. 3 in the directions of arrows A and B to take an X-ray image. After sliding it in the direction of arrow A and completing the X-ray image taking, the top plate stand 2 is raised, and at a predetermined upright angle, the top plate 3 is moved in the direction of the arrows. Although an operation is performed to return it to the direction B, the top plate 3 remains in the position indicated by the broken line due to the aforementioned non-operation of the micro switch 11 and the cam 8, and is caught on the floor surface 12, resulting in destruction. In the present invention, such accidents can be prevented by improving the drive circuit for the top plate base and the top plate.

FIG. 4 is a circuit configuration diagram showing a specific example thereof. In the figure, A and B indicate control power lines for a motor, which will be described later, and SW1 is a switch activated to control the raising and lowering of the top plate 2, and is manually opened and closed by the operator. MS1 is a micro switch fixed to the main body base 1 so that it opens when the top plate 2 is in the vertical position (standing position) and always closes in other positions. Rotate in the standing direction and slide the top plate longitudinally downward so that the top plate 3 in the protruding state is placed on the floor 1.
The microswitch does not operate until it comes into contact with 2 (for example, at 50 degrees), and the contact state at that time is as shown in the figure. MS3 has a contact point 1t when the top plate 3 is in the direction of arrow B from the reference position of the top plate stand 2 (the position where the top plate 3 does not contact the floor surface 12 even if it is vertical).
-1a is a micro switch that closes, these micro switches are attached to the main body base,
Opening and closing operations are performed by a cam mechanism. Also,
RY1 is switch SW1, micro switch MS
1, MS2 a contact or switch SW1, micro switch MS1, MS2 b contact, MS3 1a
The relay coil is energized via a contact, and the relay contact RY1-a is inserted between the AC power source 13 and the motor 14 for raising and lowering the top plate. RY2 is a relay coil that is energized via the switch and the micro switch when the contact of the micro switch MS3 is switched to the 1b side;
RY2-a is inserted between the AC power supply 13 and the top slide motor 15.

Next, the operation of the same circuit will be explained. First, assume that the top plate 3 is sliding in the direction of arrow A and the top plate stand 2 is slightly inclined from horizontal. In this case, even if the operator closes the switch SW1, the motor 14 that starts the top plate 2 does not operate. However, since the contacts of micro switches MS2 and MS3 are connected to the B contact side, the relay coil
RY2 is energized and the motor 15 is driven by closing its contact RY2-a. That is, the top plate 3 slides in the direction of arrow B, and at a predetermined position, the micro switch MS3 is controlled by the cam mechanism.
The contact 1b is switched to the contact 1a, and the top plate stops sliding. By switching the micro switch MS3, the relay coil RY1 is energized, and by closing its contact RY1-a, the motor 14 is driven, and the top plate 2 is rotated in the vertical direction. This continues until microswitch MS1 is opened. If the top plate 3 is located approximately at the center of the top plate base 2 and the contact point of the micro switch MS3 is on the 1a side, the relay coil RY2 will not operate, and the relay coil RY1 will operate from the beginning. The top plate 2 rotates in the vertical direction. At the same time that the top plate 2 becomes vertical, the micro switch MS1 opens and the top plate 2 becomes vertical.
rotation also stops. From now on, this process will be repeated, and when the top plate 3 is in the direction of arrow A (protruding direction), be sure to slide the top plate in the direction of arrow B, and when it is placed in the predetermined position, the top plate 2, the top board stowing always takes priority when the top board stands up, so it will not start with the top board not stowed due to the switch not working or the wiring being disconnected. This prevents accidents such as the top plate coming into contact with the floor surface when controlling the top plate stand up. Moreover, since the operation of preventing the top plate from colliding with the floor surface and finally raising it up is performed fully automatically, it is excellent in operability.

In the above-described embodiment, angle detection is explained using a micro switch and a cam mechanism as an example, but the present invention is not limited to this, and it goes without saying that a magnetic type switch or a switch means based on photoelectric detection may also be used. Furthermore, when the top plate 2 is in the vertical position, the micro switch MS1 is opened, so the circuit in Fig. 4 cannot be restarted.
It can be started by controlling MS1 to close.

As is clear from the above explanation, according to the present invention, the circuit configuration is such that when controlling the tabletop stand to raise it, it is performed after confirming that the tabletop is stowed. The tabletop stand will not be stood up with the top plate protruding due to the cause of the problem, and accidents of the top plate touching the floor surface can be eliminated, and harm to the examinee can be prevented. This can be said to be a complete safety measure for this type of X-ray imaging device. Moreover, since the operation of preventing the top plate from colliding with the floor and finally raising it up is performed fully automatically, it has excellent operability.

[Brief explanation of drawings]

The attached drawing is a diagram for explaining the present invention, and
FIG. 1 is an external perspective view of an X-ray imaging apparatus equipped with a top plate that can be raised and lowered and slid, and FIG. 2 is a schematic configuration diagram for explaining its internal drive mechanism.
FIG. 3 is a front view showing the overall configuration, and FIG. 4 is a top plate stand and a top plate drive control circuit diagram showing an embodiment of the present invention. 1...Body base, 2...Top plate stand, 3...Top plate, 4...
Film device, 5...Bearing, 6...Axis, 7...Pulley, 8...Cam, 9, 14...Motor for raising/lowering the top plate stand, 10...Belt, 11...Micro switch for detecting the tilting angle, SW1...Top plate stand Switch for starting/lowering,
MS1...Micro switch for detecting the upright position of the table top, MS2...Micro switch for detecting the tilted position of the tabletop, MS3...Micro switch for raising and lowering the tabletop and switching the top slide, RY1...Relay for raising and lowering the tabletop. , RY2...Relay for top plate slide, 15...Motor for top plate slide.

Claims (1)

[Scope of utility model registration request] A fluoroscopic imaging table that rotates around a support shaft attached to the main body base, a top plate that is attached to the top of the fluoroscopic imager stand so that it can slide in the longitudinal direction of the fluoroscopic imager, and a drive motor for the fluoroscopic imager and the top plate. An X-ray imaging device with a fluoroscopic imaging table that can be moved up and down,
a position detection switch MS1 that is opened only when the fluoroscopic imaging table is in a vertical position; and a position detection switch MS1 that is connected in series with the switch and configured to rotate at a predetermined angle when the fluoroscopic imaging table rotates in the upright direction with the top plate slidingly protruding. At this point, there is a changeover switch MS2 that switches to the top plate slide drive circuit, and this switch functions when the switch is switched to the top plate slide drive side, and when the top plate is slid and accommodated in a predetermined position on the fluoroscopic imaging table, the fluoroscopic imaging table is turned on. Switch MS that switches to the raising/lowering circuit of the photographing stand
3, and relay circuits RY1 and RY2 whose respective contacts are inserted into the motor circuit for driving the fluoroscopic imaging table and the motor circuit for sliding the top plate. An X-ray photographing apparatus characterized in that it is configured so that its standing up can be controlled.