JP3254867B2 - X-ray fluoroscope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray fluoroscopic apparatus in which a bed portion is supported so as to be capable of turning up and down, and more particularly, to an X-ray fluoroscopic apparatus characterized by a structure in which the bed portion is turned up and down. Related to the device.

[0002]

2. Description of the Related Art In the above X-ray fluoroscopic apparatus, it is necessary to prevent the end of the bed from colliding with the floor when the bed is turned upside down.
For example, (a) a mode in which the bed portion is slid in the inclined upward direction when the bed portion is turned upside down. (B) An embodiment in which the bed portion is entirely raised and lowered when the bed portion is turned upside down (see Japanese Patent Application Laid-Open No. 5-146428). It has been known.

[0003]

However, in the former case (a), the height of the bed portion is fixed, and the posture of the operator in changing the placement of the subject or performing a close-up procedure is difficult. There was a problem that it was not possible to respond to requests to lower the bed height.

On the other hand, the latter configuration (b) has an advantage that the bed height can be set arbitrarily, but a driving mechanism for raising and lowering the bed and a driving mechanism for raising and lowering the bed are provided. Since the mechanism and the separate mechanism are separately provided, the weight of the entire apparatus increases, and complicated control needs to be performed in order to associate the two operations, resulting in an increase in the cost of the apparatus.

The present invention has been made in view of such circumstances, and is intended to enable the bed to be turned up and down and raised and lowered in the latter form (b) while using a single drive mechanism. It is an object.

[0006]

The present invention has the following configuration to achieve the above object. That is, the X-ray fluoroscopic apparatus according to the present invention includes a leg fixed to the floor, a carriage supported on the leg so as to be vertically movable, and a bed mounted on the carriage so as to be capable of turning up and down. And a sprocket integrally connected to the bed at the axis of rotation of the bed, a sprocket pivotally supported at the upper, lower, left and right portions of the leg, a drive sprocket pivotally supported by the carriage, and a drive sprocket. A drive mechanism mounted on the carriage unit for reverse rotation drive, an endless belt wound around the drive sprocket and each sprocket, a lock mechanism for preventing rotation of the drive sprocket, and both sprockets on the leg side And a lock mechanism for preventing rotation.

[0007]

The operation of the present invention is as follows. For example,
As shown by the chain line in FIG. 6, when the bed 2 is in the horizontal state, only the right sprocket 11b is locked by the lock mechanism 16.
b, the drive sprocket 14 is driven and rotated clockwise, and the left half of the chain 15 is wound up.
The carriage portion 8 is pulled up while the sprocket 10 is rotated clockwise. In other words, the bed 2 tilts upward and to the left while rising, so that the right end of the bed 2 can be rotated without colliding with the floor surface. When only the left sprocket 11a is locked by the lock mechanism 11a and the driving sprocket 14 is driven to rotate counterclockwise, the bed 2 can be tilted upward to the right while being raised.

As shown in FIG. 7, when only the sprocket 10 is locked by the lock mechanism 17 and the driving sprocket 13 is driven and rotated clockwise while the bed portion 2 is in a horizontal state, the carriage 8 portion is moved by the winding amount of the chain 15. Descends,
The bed 2 descends in parallel. In this state, the bed portion 2 can be raised in parallel by driving and rotating the drive sprocket 13 clockwise.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the X-ray fluoroscopic apparatus according to the present invention will be described below with reference to the drawings. As shown in the overall front view of FIG. 1, the X-ray fluoroscopy apparatus is basically supported by a leg 1 fixed to a floor and standing up and down and capable of moving up and down. Bed section 2, an X-ray tube 4 mounted on the bed section 2 via a support 3, an image intensifier 5 installed below the bed section 2, a television shooting mechanism 6, and a magazine for image shooting film The storage unit 7 is configured. The bed section 2 is equipped with a horizontally movable top plate 2b on which the subject lies.

FIGS. 2 to 4 schematically show a structure for raising and lowering the bed portion 2 and raising and lowering it. That is, a carriage 8 is supported on the leg portion 1 via a guide rail 9 so as to be able to move up and down. The bed portion 2 is supported on the carriage 8 so as to be able to turn up and down around a fulcrum P. A large diameter sprocket 10 is connected to the end of the support shaft 2a of the bed 2 concentrically with the fulcrum P, and sprockets 11a, 11a,
11b, 11c, and 11d are rotatably supported on the respective shafts. The carriage 8 is equipped with a freely rotatable sprocket 12 and a drive sprocket 14 connected to a motor (drive mechanism) 13, and a chain 15 is wound around these sprocket groups as shown.

The upper sprocket 11 in the leg 1
a and 11b include a lock mechanism 16 for preventing the rotation thereof.
a, 16b, and a lock mechanism 17 for preventing the rotation of the sprocket 11 is also provided.

As shown in FIG. 5, the lock mechanisms 16a and 16b connect the tooth clutch 18 to an electromagnetic solenoid 19, as shown in FIG.
It is configured to operate with. In the state where the electromagnetic solenoid 19 is not energized, the movable clutch piece 18a, which is non-rotatably supported by the frame 20 as shown in FIG.
As a result, the sprocket support shaft 21 engages with the fixed clutch piece 18b integrated with the sprocket support shaft 21 to lock the sprocket support shaft 21 so that it cannot rotate. When the electromagnetic solenoid 19 is energized, the movable clutch piece 18a is displaced backward against the spring 18c, the engagement with the fixed clutch piece 18b is released, and the sprocket socket shaft 21 becomes rotatable.

Incidentally, the locking mechanism 17 of the sprocket 10
Is configured to lock or unlock the sprocket to be engaged with the sprocket 10 by a tooth clutch having the same configuration as described above.

Next, the operation of the above configuration will be described. (A) Only the right sprocket 11b is locked by the lock mechanism 16b in the state shown in FIG.
4 is driven and rotated clockwise, as shown in FIG.
The left half of the chain 15 is wound up and the sprocket 1
The carriage unit 8 is pulled up while 0 is rotated clockwise. In other words, the bed 2 tilts upward and to the left while rising, so that the right end of the bed 2 can be rotated without colliding with the floor surface.

When only the left sprocket 11a is locked by the lock mechanism 16a and the driving sprocket 14 is driven and rotated in the counterclockwise direction, the bed 2 can be tilted upward to the right while being raised.

(B) The sprocket 1 shown in FIG.
When only the lock mechanism 17 is locked by the lock mechanism 17 and the drive sprocket 14 is driven and rotated clockwise, as shown in FIG. 7, the carriage 8 is lowered by the winding amount of the chain 15 and the bed 2 is moved in parallel. Descend. In this state, the bed 2 can be raised in parallel by driving and rotating the drive sprocket 14 in the clockwise direction.

Note that toothed belts can be used in place of the chains, and these chains and toothed belts are collectively referred to as endless belts. Also, as the lock mechanism,
In addition to using tooth clutches, the present invention can be embodied in a form in which a lock claw is engaged with the teeth of the sprocket.

[0018]

As is apparent from the above description, according to the X-ray fluoroscopic apparatus of the present invention, the bed portion is raised and lowered and the entire bed portion is moved up and down to prevent the bed portion from colliding with the floor surface. Although it can be turned upside down, the drive mechanism can be made into a single unit, which is effective in reducing the weight and cost of the device, and simple control just by selecting the lock mechanism Now, the desired operation can be performed.

[Brief description of the drawings]

FIG. 1 is an overall front view of an X-ray fluoroscopic apparatus according to an embodiment.

FIG. 2 is a schematic front view showing a raising / lowering structure of a bed unit.

FIG. 3 is a schematic plan view showing a structure for turning the bed part up and down.

FIG. 4 is a schematic side view showing a structure for turning the bed up and down.

FIG. 5 is a partially cutaway longitudinal side view of the lock mechanism.

FIG. 6 is a schematic front view showing a state in which the bed unit is turned upside down.

FIG. 7 is a schematic front view showing a state in which a bed portion is raised and lowered in parallel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Leg part 2 Bed part 8 Carriage part 10 Sprocket 11a-11d Sprocket 12 Sprocket 13 Drive mechanism 14 Drive sprocket 16a, 16b Lock mechanism 17 Lock mechanism

──────────────────────────────────────────────────続 き Continued on the front page (56) References JP-A-1-2044651 (JP, A) JP-A-51-42494 (JP, A) JP-B-42-25513 (JP, B1) JP-B 32-32 7828 (JP, B1) (58) Field surveyed (Int. Cl. ⁷ , DB name) A61B 6/03-6/04

Claims (1)

(57) [Claims] 1. A leg fixed to a floor, a carriage supported on the leg so as to be vertically movable, a bed mounted on the carriage so as to be capable of turning up and down, and a bed rotating shaft. A sprocket integrally connected to the bed at the center, a sprocket pivotally supported on the upper, lower, left and right portions of the legs, a driving sprocket pivotally supported by the carriage, and a carriage for rotating the driving sprocket forward and reverse. Equipped drive mechanism, drive sprocket and endless belt wound around each sprocket, lock mechanism for preventing rotation of drive sprocket, and lock mechanism for preventing rotation of both sprockets on leg side An X-ray fluoroscopic apparatus comprising: