JPH04111311U - Top plate moving device - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to always position the top plate reliably without depending on the displayed value of the indicator, and moreover, it is possible to position the top plate at any position in the body axis direction by canceling the electric state of the top plate. Another object of the present invention is to provide a moving device for a top plate that can be easily moved manually. [Structure] In the device for moving a top plate, a brake is provided that releases the braking state on the sprocket shaft on the chain drive side when the power source for operating the device is turned on, and enters the braking state when the power source is turned off; a top plate electric movement mechanism having a clutch that operates to transmit torque to the sprocket shaft and operates in a free state in which torque transmission is not possible when the power is OFF; and a top plate electric movement mechanism that operates during the electric movement when the power is OFF. The present invention is characterized in that it is provided with a mechanism for releasing the electric state of the top plate, which is comprised of a switch and a lever mechanism that releases the brake in the braking state and simultaneously puts the clutch in a free state in which torque transmission is not possible.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a device for moving a top plate in a medical machine such as an X-ray CT device, and in particular, , the electrically movable top plate can be easily and arbitrarily moved manually by releasing the motorized state. The present invention relates to a top plate moving device suitable for moving a top plate to a position.

0002

[Conventional technology]

Conventional devices for moving the top plate of medical machines such as X-ray CT machines are A chain is stretched along the longitudinal direction of the top plate, and both ends of the chain are meshed with each other. A drive device electrically rotates each sprocket on the driven side and drive side located on the By moving the chain, you can extend the length of the top plate connected to the chain. It was configured to move in the hand direction (body axis direction). This movement allows the subject to It is moved to a fixed inspection position (for example, CT scanner part), and the position is determined at that position. It is then inspected. However, during the test, some abnormality occurred in the subject's physical condition. It becomes necessary to urgently evacuate outside the examination position (for example, outside the CT scanner). In such a case, move the top plate backwards from the above-mentioned examination position to resolve the abnormality of the patient. Must. Then, after taking measures to remove the abnormality in order to continue the test, again. It is necessary to move the top plate forward to the positioning position and reset the subject.

0003 For this reason, conventionally, the chain could be connected and disconnected from any position on the top plate. Attach a connecting device that is capable of connecting and disconnecting the connecting device from the chain by hand. The top plate is moved electrically when connected, and manually when disconnected. the emergency evacuation and the forward re-movement to the positioning position after the evacuation. It makes it possible. After moving forward again, the connected state is established. The amount of movement of the top plate in this case is configured to be displayed on the indicator. The positioning of the subject during the motorized movement is performed by the operator while observing the displayed values, When repositioning by the manual movement, the motorized movement memorized by the operator is performed. Positioning was performed according to the displayed value.

0004

[Problem that the idea aims to solve]

As mentioned above, the conventional top plate moving device releases the connection between the coupling tool and the chain and manually moves the top plate. Make the top plate movable with It is possible to reposition the top plate forward, but in this case, the repositioning position of the top plate is electrically moved. The operator must memorize the displayed value of the indicator at the time of positioning. There are unnecessary complications.

[0005] In addition, positioning based on the value displayed on the indicator can be used to connect the coupling tool and the chain. Repeated calls and uncoupling may cause slight deviations in the displayed value itself, and if the top plate is Even if you position it at a fixed position, when you return it to that position, it will not match the previous position. There is a problem with difficult position repeatability, which makes it difficult to accurately image the desired area. It had some serious problems. In view of the above-mentioned problems of the conventional technology, the present invention improves the positioning of the top plate using indicators. It can always be performed reliably without depending on the displayed value, and the top plate is electrically operated. A device for moving the top plate that can be easily moved manually to any position along the body axis by releasing the The purpose is to provide

[0006]

[Means to solve the problem]

In order to achieve the above purpose, the present invention includes a top plate on which the subject is placed, and a A chain stretched along the direction, and a chain meshed with the chain and placed at both ends Drive the sprockets on the driven side and drive side, and the sprocket on the drive side. and a drive device for moving the top plate in its longitudinal direction. and when the power for operating the drive unit is turned on, the drive side sprocket shaft is The brake that is in the braking state when the power source is turned off and the brake that is in the braking state when the power source is turned off, and When ON, it operates to be able to transmit torque to the drive side sprocket shaft, and A clutch that operates in a free state in which torque transmission is not possible when the power source is OFF. an electric movement mechanism for the plate; and a brake in a braking state during the electric movement when the power is OFF. A step that releases the rake and simultaneously puts the clutch in a free state in which torque cannot be transmitted. The structure is equipped with an electric state release mechanism for the top plate consisting of a switch and a lever mechanism. It is something.

[0007]

[Effect]

With the above configuration, when moving the top plate normally using electric power, the top plate cannot be moved. Turn on the power supply for operating the drive device. In this state, the brake is on the drive side. The brake on the sprocket shaft is released, and the clutch is connected to the sprocket shaft on the driving side. The top plate is connected to the top plate so that torque can be transmitted thereto, making the top plate movable. For this reason, heaven The plate can be moved to any predetermined position and distance. moving tabletop If you want to stop the breaker, just turn off the power supply, and in this state, turn off the breaker. The key brakes the sprocket shaft on the drive side, and the clutch brakes the sprocket shaft on the drive side. The connection is separated and the top plate becomes free, stopping the top plate.

[0008] When manually moving from the above electric movable state, connect the top plate and chain. Turn off the power supply for operating the drive device while keeping the Operate the bar mechanism. This operation activates the switch of the electric state release mechanism and Release the brake in the active state, and at the same time disengage the clutch to transmit torque. make it unattainable. In this state, the top plate is disconnected from the power transmission system during electric movement. Easily detached and placed in any position with the chain manually as in the case of motorized movement be able to move to. In addition, when returning from manual movement to electric movement, use the lever mechanism mentioned above. to release the switch and move the brake and clutch electrically. to return to a functional state.

[0009]

【Example】

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 4. Figure 1 is the device theory 2 is a detailed plan view of the drive unit for moving the top plate in FIG. 1; 3 is a view taken along arrow III-III in FIG. 2, and FIG. 4 is a modification of FIG. 2. In Figure 1, 1 is a top plate on which the subject is placed, and 2 is a top plate stretched along the longitudinal direction of the top plate 1. 3 is the sprocket on the driven side located at one end of the chain 2. 4 is the drive side sprocket located on the other end side, 5 is the sprocket 4 6 is a motor (in this case, a motor with a worm gear), 7, 8 is a pair of gears driven by the motor 6, 9 is a gear shaft, and 10 is fixed to the gear shaft 9. When the motor 6 is turned on and the motor 6 is turned on, the brake 10 is operated by the gear shaft 9. It will be in a free state to release the brake, and will remain in the braking state when the power is off and the vehicle is stopped. This is a negative actuation type brake that is electrically connected to the sea urchin. 11 is fixed to the gear shaft 9 The clutch 11 has a torque applied to the shaft 5 when the power is turned on. It operates in a free state in which torque transmission is not possible when the power is OFF. electrically connected so that The ON/OFF operation of the power supply is usually performed using a CT switch. This is done using a push button provided on the front panel of the scanner section. 12 is the electricity on the top plate 1. The lever 13 of the dynamic state release mechanism is a miter activated by operating the lever 12. It's a cross switch.

0010 14 is a stock that is fixed at both ends of the chain 2 and moves together with the chain 2. 15 is a pin fixed to the stopper 14, and 16 can come into contact with the stopper 14. A connector 17 projects downward from the top plate 1, and 17 engages and engages with the pin 15. The hook 18 is releasably provided on the connector 16, and the hook 18 is connected to the hook via the link mechanism 19. This is the handle that operates 17. Operate the handle 18 to release pin 1 of the hook 17. When the engagement with 5 is released, the top plate 1 is separated from the power transmission system and can be manually moved rearward. become capable. When the top plate 1 is manually moved to the rearmost position shown by the chain line in FIG. The rear part of the hook 17 engages with a pin 20 provided on the device frame, and the hook 17 is in that position. It is designed to stop. When the handle 18 is operated in this state, the hook 1 7 and the pin 20 are released, and the top plate 1 can be moved forward manually. forward The top plate 1 stops when the connector 16 comes into contact with the stopper 14, and is disconnected from the power transmission system. Return to the original position before releasing. At the same time, the hook 17 engages with the pin 15 and moves. It is designed to be connected to a force transmission system.

[0011] In FIGS. 2 and 3, the lever 12 is supported at one end by a pin 21, and It is rotatable around the pin 21 in the direction of the arrow in FIG. Middle part of lever 12 is provided with an elongated hole 12a, and a pin fixed to the rod 22 is inserted into the elongated hole 12a. 23 is inserted. Therefore, in Fig. 2, when the lever 12 is rotated, the pin The rod 22 moves in the vertical direction in the figure via the rod 23 . The lower part of the rod 22 is moved The two microswitches 13 for the brake 10 and the clutch 11 are They are configured to be turned on or off at the same time.

0012 Next, the operation of the above configuration will be explained. First, the electric movement of the top plate 1 is performed using the motor 6. Turn on the power and release the brake 10 from braking the sprocket shaft 5. , the clutch 11 is connected to the sprocket shaft 5 so that torque can be transmitted, and the top plate 1 is electrically connected. Make it movable. In this state, the top plate 1 can be arbitrarily moved to a predetermined position and distance. can move. If you want to stop the top plate 1 while it is moving electrically, turn off the power supply. Set it to state F. In this state, the brake 10 brakes the sprocket shaft 5 and causes a crack. The chain 11 is disconnected from the sprocket shaft 5 and becomes free, stopping the top plate 1. let

[0013] Next, due to an abnormality of the subject, etc., the top plate 1 is manually moved from the above-mentioned state where it can be moved electrically. When moving backwards, turn on the power to the motor 6 while keeping the top plate 1 and chain 2 connected. Turn it to the OFF state and operate the lever 12. With this operation, brake 10 and The two microswitches 13 for the brake and clutch 11 are activated, and the brake is in the braking state. 10 is released, and at the same time, the clutch 11 is released, making it impossible to transmit torque. do. In this state, the top plate 1 is separated from the power transmission system during electric movement, and the top plate 1 is separated from the power transmission system during electric movement. It can be easily moved to any position manually along with the chain 2, as in the case of the case. hand When returning from dynamic movement to electric movement, operate the lever 12 and press the micro switch 13. to return the brake 10 and clutch 11 to the electrically movable state. let

[0014] Next, in addition to the manual movement of moving the top plate 1 to an arbitrary position as described above, initially electric movement is possible. The top plate 1 may be manually moved to the determined examination position due to the patient's abnormality as described above. After taking measures to remove the abnormality, the top plate 1 is returned to the above-mentioned inspection position in order to continue the inspection. In some cases, the subject may be reset by moving forward until the Operate the handle 18 to release the engagement between the hook 17 and the pin 15, and place the top plate 1 on the chain. 2 and the power transmission system, and manually move it to the rear. Top plate 1 is shown in Figure 1. When the hook 17 is manually moved to the rearmost position shown by the chain line, the rear of the hook 17 touches the device holder. It engages with a pin 20 provided on the frame, stops at that position, and takes measures against the subject. It will be done. After the test subject preparation is completed, the top plate 1 is moved forward to the above-mentioned testing position again and the test subject is removed. To reset, operate the handle 18 to disengage the hook 17 and pin 20. and move the top plate 1 forward manually. When the top plate 1 is moved forward, the connector 16 is the stopper 1. 4 and stopped, and there was no need to memorize the displayed value of the indicator. to a position that corresponds to the original positioning position, which is the inspection position before disconnecting from the power transmission system. be returned. At the same time, the hook 17 engages with the pin 15 and is connected to the power transmission system. After that, it returns to the state where it can be moved electrically.

[0015] In FIG. 4, when 24 operates the lever 12 and releases the lever 12, This is a spring for automatically returning the lever 12 to the position before operation. This lever 1 The automatic return in step 2 reliably distinguishes between electric movement and manual movement. A spring 24 is provided. This prevents simple operational errors by the operator who forgets to return the lever 12 to its original position. This has the effect of increasing safety.

[0016]

[Effect of the idea]

As explained above, the present invention allows the positioning of the top plate to depend on the displayed value of the indicator. This can be done reliably at all times, without having to worry about any It has the effect of being able to be easily moved manually to any position in the body axis direction.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram for explaining an apparatus showing an embodiment of the present invention.

FIG. 2 is a detailed plan view of a drive device portion for moving the top plate in FIG. 1;

FIG. 3 is a view taken along the line III-III in FIG. 2;

FIG. 4 is a modification of FIG. 2;

[Explanation of symbols]

1 Top plate 2 chain 3 Driven side sprocket 4 Drive side sprocket 5 Sprocket shaft 6 motor 10 Brake 11 Clutch 12 Lever 13 Switch (micro switch) 14 Stopper 15 pin 16 Connector 17 Hook 18 Lever 20 pins

Claims (1)

[Scope of utility model registration request] Claim 1: A top plate on which a subject is placed, a chain stretched along the longitudinal direction of the top plate, and a driven side and a driving side meshed with the chain and arranged at both ends thereof. and a drive device that drives the sprocket on the driving side to move the top plate in its longitudinal direction, when the power for operating the drive device is turned on, the drive side a brake that releases the braking state on the sprocket shaft and enters the braking state when the same power is turned off;
an electric moving mechanism for a top plate having a clutch that operates to transmit torque to the sprocket shaft on the drive side when the power source is ON, and operates in a free state in which torque transmission is not possible when the power source is OFF; and the power source It is characterized by providing a top plate electric state release mechanism comprising a switch and a lever mechanism that releases the brake in the braking state during the electric movement when in the OFF state and simultaneously puts the clutch in a free state in which torque transmission is impossible. A device for moving the top plate.