JPH0440646Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field] The present invention relates to a patient table device, and in particular, to a patient table device used in combination with a whole-body X-ray CT device, in an emergency, the patient can be scanned quickly. This relates to a mechanism for evacuating the vehicle.

[Background technology]

A patient table device used in combination with a conventional whole-body X-ray CT device uses an electric motor to automatically move the top plate on which the patient is placed back and forth. With such a mechanism, for example, when a patient's condition worsens during a scan and urgent treatment is required, if you want to quickly pull the patient out of the scanner, you cannot operate the patient at a predetermined speed using an electric motor. There was a problem of not being able to make it in time. Further, when placing a patient into a scanner, the conventional electric feeding method is frustrating when the patient's condition deteriorates and urgent treatment is required.

[Purpose of invention]

An object of the present invention is to provide a technique that can quickly handle the patient table device when the patient's condition deteriorates and urgent treatment is required during scanning or when the patient is placed in the scanner.

The above and other objects and novel features of the present invention will become apparent from the description of this specification and the accompanying drawings.

“Summary of the invention” In order to achieve these objectives, this invention
Basically, in a patient table device that includes a feed screw that is rotated by the drive of an electric motor and a top plate that is fixed to a support nut that is screwed into the feed screw, the top plate is fixed to the support nut on the side of the top plate. The support is provided by a top plate attachment/detachment pin that projects vertically from the support nut and is inserted into a fitting hole formed in the support nut, and is supported by a mechanism for moving the top plate attachment/detachment pin toward the top plate side. The fixing of the top plate to the support nut can be released by detaching the top plate attaching/detaching pin from the fitting hole of the nut, and the mechanism for moving the top plate attaching/detaching pin toward the top plate side, A link mechanism that includes a rotatable handle and an output end connected to the top plate attachment/detachment pin that moves linearly along the axial direction of the top plate attachment/detachment pin due to movement of the input end as the handle rotates. It is characterized by consisting of the following.

[Effect of invention]

In the patient table device configured in this way, if the feed screw is rotated by driving the electric motor, the top plate can be moved in the axial direction of the feed screw via the support nut.

For this reason, the moving speed of the top plate depends on the rotational speed of the electric motor, etc., but in the case of emergency treatment, it may be more convenient to move the top plate manually.

Therefore, the top plate is fixed to the support nut by a top plate attachment/detachment pin that protrudes vertically from the top plate side and is inserted into a fitting hole formed in the support nut, and also The fixing of the top plate to the support nut can be released by detaching the top plate attachment/detachment pin from the fitting hole of the support nut by a mechanism for moving the pin toward the top plate side.

However, in emergency treatment, in addition to being able to perform the above-mentioned operations, it is also required that the top plate attachment/detachment pin be detached from the support nut with an extremely light operation and reliably. However, if you are confused about this movement, even if you can operate the top plate manually, it will not be of much use.

Therefore, in the present invention, a special mechanism for moving the top plate attaching/detaching pin toward the top plate side is devised, and the top plate is moved by a rotatable handle and an input end that moves with the rotation of the handle. The output end connected to the attachment/detachment pin is configured with a link mechanism that performs linear movement along the axial direction of the top plate attachment/detachment pin.

In this way, the top plate attachment/detachment pin will be attached or removed in a direction perpendicular to the direction of movement of the support nut, and the movement of the top plate attachment/detachment pin due to the attachment or detachment will be caused by the movement of the top plate attachment/detachment pin from the link mentioned above. The mechanism allows for alignment in the axial direction.

Therefore, the top plate attaching/detaching pin can be easily attached and detached from the support nut without requiring much force, and furthermore, the movement of the top plate is not affected by this.

[Example of idea]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A patient table device used in combination with a whole-body X-ray CT apparatus according to an embodiment of the present invention will be described below with reference to the drawings.

In addition, in all the figures for explaining the examples,
Components having the same function are given the same reference numerals, and repeated explanations thereof will be omitted.

FIG. 1 is a perspective view showing the configuration of the main parts of the patient table device of this embodiment, FIG. 2 is a diagram for explaining the principle of the link mechanism shown in FIG. 1, and FIG. A diagram for explaining the principle of the locking and unlocking mechanism, FIG. 4 is a plan view showing the configuration of the locking and unlocking mechanism of the top plate in FIG. 3, and FIG. A plan view showing the entire configuration of the patient table device used in combination with a CT scanner, FIG. 6 is a front view of FIG. 5, and FIG. 7 is a front view of FIG.
8 is a plan view showing the structure of the top drive unit of this embodiment, and FIG. 9 is a sectional view of the top drive unit taken along line A-A in FIG. 8. It is.

As shown in FIGS. 5 to 7, the patient table device of this embodiment has a concave or convex support portion 2A (FIG. 7) provided at a predetermined position on the top plate 2 on which the patient is placed. Guide rails 1 and 1' are provided at predetermined positions on the patient table device body 1 to slidably engage with the support portion 2A. The patient table device main body 1 includes a drive unit 30 that slides the top plate 2.
(The part circled with a broken line) is provided. Further, as shown in FIG. 6, the patient table device main body 1 is provided with a levitation mechanism, and this levitation mechanism lifts the top plate 2 using an air cylinder 20 and lifts the top plate 2 using a link mechanism 21. configured to support.

As shown in FIGS. 8 and 9, the drive unit 30 has frames 34 and 35 attached to predetermined positions of the patient table device main body 1, and a feed screw 3 that is a bearing provided on the frames 34 and 35. It is rotatably supported by 34A and 35A. A pulley 32 is provided at the end of the feed screw 3 on the bearing 35A side, and a support nut 4 is further attached.

Further, the top plate attachment/detachment pin 8 provided on the top plate manual mechanism support member 5 attached to a predetermined position of the top plate 2 is attached/detachable to the fitting hole 4A provided on the upper surface of the support nut 4. They fit together freely. This fitting hole 4A has a tapered shape.

The drive mechanism for the feed screw 3 has a configuration in which a drive pulley 33 is attached to the rotating shaft of a drive motor 31 attached to the frame 35. The drive pulley 33 is connected to a pulley 32A attached to the frame 35 via a belt 32B, and the drive pulley 33 is connected to the drive motor 31.
The rotation is transmitted. Pulley 3
2A is connected to the pulley 32 via a belt 32B, rotation is transmitted, and the feed screw 3 is rotated.

The support nut 4 is configured to move back and forth as the feed screw 3 rotates. The front stop position of this support nut 4 is the frame 34
The subsequent stop position is controlled by a limit switch 37 attached to the frame 35. That is, when the support nut 4 moves back and forth due to the rotation of the feed screw 3, the stop position is determined by the limit switch 36,
37 is detected and the rotation of the drive motor 31 of the feed screw 3 is stopped.

The amount of movement of the support nut 4 is detected by a rotary encoder 40 attached to the frame 35.
This is done by detecting the rotational speed of the pulley 34.

Next, the configuration of the top manual mechanism 50 (the part surrounded by the broken line in FIG. 9) provided in the patient table device main body 1 will be explained.

As shown in FIGS. 1 and 7, concave or convex support portions 2A are provided on both sides of the top plate 2,
Guide rails 1, 1' which are slidably engaged with the support portion 2A are provided on the upper frame of the patient table device main body 1. A protrusion member 16 and a top manual mechanism support member 5 are attached to a predetermined position at the rear of the top plate 2. The top manual mechanism support member 5 has a U-shaped structure.

A top plate attachment/detachment pin 8 is provided in the lower part of the top plate manual mechanism support member 5 so as to be movable up and down through a through hole. This top plate attachment/detachment pin 8 is for connecting and disconnecting the top plate 2 and the support nut 4. In addition, the top plate manual mechanism support member 5
A rod 9 is provided at the rear end of the upper part of the rod 9 so as to be slidable horizontally in the hole. Further, a stopper portion 8A is provided to prevent the top plate attachment/detachment pin 8 from falling from the top plate manual mechanism support member 5.

Further, one end of a link 6 is rotatably attached to a predetermined position of the top plate manual mechanism support member 5 with a mounting pin 6A, and the other end is rotatably attached to a stopper portion 8A of a top plate attachment/detachment pin 8. Connecting pin 7A
Insert the connecting pin 6 in the center of the link 7 attached with
It is rotatably attached at B. Further, one end of a link 10 and the other end of the link 7 are rotatably attached to the rod 9 by a connecting pin 7B. A spring 12 is provided between the connecting pin 7B and the manual top mechanism support member 5 so as to rotate the link 7 clockwise.

The other end of the link 10 is rotatably attached to one end of the link 11 with a connecting pin 10A. The other end of the link 11 is fixed to a predetermined position of a handle 13 rotatably attached to the top plate 2.

That is, the link mechanism composed of the link 6, link 7, link 10, link 11, and spring 12 described above has the link 11 fixed to the handle 13 as the input end, and the link 7 as the top plate attachment/detachment pin 8. The output end is the connection point with the handle 13, and as the input end moves with the rotation of the handle 13, the output end moves linearly along the axial direction of the top plate attachment/detachment pin 8. It's getting old.

Further, a top plate locking hook 14 is attached to the end of the handle 13. This top plate locking hook 14 is provided with an inclined hook portion 14A, as shown in FIG. and,
Stopper members 15 and 17 are provided at predetermined positions on the patient table device main body 1, as shown in FIG. The hook portion 14A of the top plate locking hook 14 is locked by the stopper member 15,
A protrusion member 16 provided on the top plate 2 is locked by a stopper member 17. As a result, the top plate 2 is fixed to the rearmost portion of the patient table device main body 1.

When the state of FIG. 3 is viewed from the top of the table, the state is as shown in FIG. 4.

Next, the operation of the top manual mechanism 50 of this embodiment will be explained.

In the link mechanism 50A consisting of the links 6, 7, 10, 11, the rod 9, and the top plate attachment/detachment pin 8, as shown in FIG. 2, the length of each node is AB=
BC=BD, and when the handle 13 is rotated in the direction of the arrow a, the rod 9 moves in the direction of the arrow b via the links 7 and 11, and the top plate attachment/detachment pin 8 is guided to the through hole of the top plate manual mechanism support member 5. and can move correctly in the direction of arrow c. As shown in FIG. 1, the tip of the top plate attachment/detachment pin 8 is tapered, and a tapered hole is provided on the upper surface of the support nut 4, so that the top plate attachment/detachment pin 8 can be attached to the support nut 4. It is made and fitted so that there is no looseness. and,
When the feed screw 3 is rotated by the drive motor 31, the top plate 2 moves forward and backward together with the support nut 4.

Next, when the handle 13 is turned in the direction of arrow a, the top plate attachment/detachment pin 8 is pulled out from the support nut 4, and the top plate can be moved manually. If the handle 13 is pulled as it is, the top plate 2 will move backward. That is,
For example, if the patient's condition worsens, the patient can be quickly evacuated from the examination position. Top plate 2
When the top locking hook 14 reaches the most retracted position, the stopper member 15 comes into contact with the inclined hook portion 14A of the top locking hook 14, as shown in FIG. It is pushed down by , and becomes the state shown in Fig. 3. Further, the top plate 2 moves backward and hits the stopper member 17, and the top plate 2 stops. At this time, the restoring force of the spring 12 causes the hook 14A of the top locking hook 14 to catch on the stopper member 15, resulting in the state shown in FIG. In this state, the movement of the top plate 2 in both directions of the arrow d and the arrow e is blocked by the stopper members 15 and 17. Therefore, since the stopper member 17 can be finely adjusted in advance, it is possible to completely eliminate backlash of the top plate 2.

Next, to return the top plate to its original position (manual control position), rotate the handle 13 in the direction of arrow a to release the hook 14A of the top plate locking hook 14 from the stopper member 15, and then The top plate 2 can be moved forward by holding it in that state.

Next, if the support nut 4 is brought forward in advance, the patient is placed on the top plate 2 when the top plate 2 is moved back the most, and the top plate 2 is manually fed into the scanner, and the handle 13 is turned. When rotated in the direction of arrow a, the rod 9 moves in the direction of arrow b via links 7 and 11, and the top plate attachment/detachment pin 8 is guided by the through hole of the top manual mechanism support member 5 and moves correctly in the direction of arrow c. Then, attach the tip of the top plate attachment/detachment pin 8 to the support nut 4.
By firmly fitting the top plate 2 into the scanner without any looseness, the top plate 2 can be fixed in the scanner, and the patient can be quickly set in the examination position.

〔effect〕

As explained above, according to the present invention, the following effects can be obtained.

(1) By removably connecting or disconnecting the rotational force transmitting member of the electric motor and the top plate, the top plate can be quickly manually set to the inspection position in the scanner, and the top plate can be evacuated. This makes it easier to treat the patient in an emergency, such as when the patient's condition deteriorates and urgent treatment is required.

(2) Since the top plate was prevented from moving when it was fully retracted, it became safe and convenient to lower the patient from the top plate.

It goes without saying that the present invention is not limited to the embodiments described above, and can be modified in various ways without departing from the spirit thereof.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the configuration of essential parts of a patient table device according to an embodiment of the present invention, FIG. 2 is an explanatory diagram for explaining the principle of the link mechanism shown in FIG. 1, and FIG. is an explanatory diagram for explaining the principle of the locking and unlocking mechanism of the top plate, and Figure 4 is the third diagram.
FIG. 5 is a plan view showing the configuration of the locking and unlocking mechanism of the top plate shown in the figure, and FIG. FIG. 6 is a front view of FIG. 5, FIG. 7 is a side view of FIG. 5, and FIG. 8 is a plan view showing the configuration of a top plate drive unit according to an embodiment of the present invention. , FIG. 9 shows the A- shown in FIG.
FIG. 3 is a cross-sectional view of the top drive unit taken along line A. In the figure, 1, 1'...guide rail, 2...top plate,
3... Feed screw, 4... Support nut, 5... Top plate manual mechanism support member, 6, 7, 10, 11... Link, 8... Top plate attachment/detachment pin, 9... Rod, 12...
... Spring, 13 ... Handle, 14 ... Top plate locking hook, 15, 17 ... Stopper member,
16...A striker (projection member).

Claims (1)

[Claims for Utility Model Registration] In a patient table device comprising a feed screw rotated by the drive of an electric motor and a top plate fixed to a support nut screwed onto the feed screw, the top plate is fixed to the support nut. This is accomplished by a top plate attachment/detachment pin that protrudes vertically from the top plate side and is inserted into a fitting hole formed in the support nut, and the movement of the top plate attachment/detachment pin toward the top plate side. The fixing of the top plate to the support nut can be released by detaching the top plate attaching/detaching pin from the fitting hole of the support nut by a mechanism, and the fixing of the top plate attaching/detaching pin to the top plate side The moving mechanism includes a rotatable handle and an output end connected to the top plate attachment/detachment pin that moves linearly along the axial direction of the top plate attachment/detachment pin due to the movement of the input end as the handle rotates. A patient table device comprising a link mechanism for performing.