JPH0654842A - Bed - Google Patents

Abstract

PURPOSE:To simply correct a deviation in the top plate short direction of a photographing area center line and the examinee body axis of an image correcting device by providing a top plate supported so as to be freely movable in the short direction in a supporting base. CONSTITUTION:On the lower face of the lower part frame, a guide 21 is attached in parallel to the top plate short direction and the guide 21 is engaged in guide receiving blocks 8, 8' so as to be freely movable. Accordingly, the lower part frame 20 is supported by the upper part base 7 so as to be freely movable in the direction (top plate short direction) as indicated with arrows A-B along the guide 21. Also, a part of the lower part frame 20 and a part of a chain are coupled by a coupler 13. Thus, the lower part frame 20 is driven in the direction as indicated with arrows A-B in accordance with forward/ backward rotations of a motor. In such a manner, when the extension line of a photographing area center and an examinee body axis are deviated, its deviation can be corrected easily by moving the top plate in its short direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bed for setting a subject in a photographing area of a computer tomography apparatus.

[0002]

2. Description of the Related Art Conventionally, a bed of this type has an elevating unit 71, a frame 72 supported by the elevating unit 71, and a longitudinal direction (arrow) of the frame 72, as shown in the schematic structure of FIG. The top plate 73 is movably supported in the direction C-D), and the subject can be inserted into the imaging area of the computer tomography apparatus in the supine position.

By the way, the computer tomography apparatus performs predetermined reconstruction calculation by using multi-directional projection data collected from multi-directional directions of an object set in an imaging area provided in a substantially central portion of the gantry. It reproduces a clear tissue tomographic image and is generally configured so that the projection lines that define each projection data intersect at the center of the shooting area, so the resolution near the center of the shooting area is good. It is desirable that the projection data be collected by performing alignment so that the extension line of the center of the imaging area matches the body axis of the subject. Normally, the bed is installed on the gantry of the computer tomography apparatus so that the extension line of the center of the imaging area coincides with the center line of the tabletop. It is done by matching. This alignment is a labor-intensive operation because the subject is moved by himself / herself in the lateral direction on the top plate under the instruction of the operator. Further, in the case of a subject whose limbs are inconvenient, this alignment is more troublesome, and the operator must hold the subject and move it on the top in the lateral direction, which is extremely difficult. It was hard work.

Furthermore, in recent years, the movement of the tabletop is often operated remotely from a console arranged apart from the bed. In this case, when the subject is displaced in the lateral direction of the tabletop, the operator's instruction is a microphone and a speaker. Since it is transmitted to the subject via the operator's instruction, it is difficult to convey the operator's instruction, which is more troublesome. On the other hand, in the case of a subject with a disability,
Since it is necessary for the operator to hold the subject, when the subject shifts in the lateral direction of the tabletop, the operator must reciprocate between the console and the bed every time, which is very troublesome.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to address the above-described circumstances, and its object is to provide a center line of an imaging area and an object body axis of an image acquisition device such as a computer tomography device. It is an object of the present invention to provide a bed which can easily correct a shift in the lateral direction of the top board.

[0006]

A bed according to the present invention comprises a support base and a top plate movably supported by the support base in the lateral direction.

[0007]

According to the bed according to the present invention, since the tabletop is movable in the lateral direction thereof, when the extension line of the center of the imaging area and the subject axis are deviated, the deviation is detected by the tabletop. It can be easily corrected by moving in the lateral direction.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing the structure of the bed according to the present embodiment, and FIG. 2 is a front view of the engaging structure between the upper base of the elevating unit and the lower frame as seen from the direction a in FIG.

In FIG. 1, an elevating unit 1 has a lower base 2 installed on the floor, and rods 3 and 4 are axially coupled to each other by a pin 5 at a substantially central portion on the lower base 2. A stepladder is arranged, an upper base 7 is supported on the stepladder so as to face the lower base 2, and a hydraulic cylinder 6 is provided by short-circuiting between the lower base 2 and the rod 4. The rods 3 and 4 are moved by the expansion and contraction movement of the hydraulic cylinder 6.
And the upper base 7 is moved up or down accordingly. A motor 10 is attached to one front side of the upper base 7, and a sprocket 11 is connected to a drive shaft of the motor 10. further,
As shown in FIG. 2, a pulley 14 is provided on one side of the front surface of the upper base 7.
And 15 are separated and pivotally supported. The chain 12 includes the sprocket 11, the pulleys 14 and 15, and the chain 1
It is wound around an auxiliary pulley 16 for adjusting the tension of No. 2 and is circulated and driven according to the forward and reverse rotations of the motor 10. On the surface of the upper base 7, guide receiving blocks 8 and 9 each having a concave cross section are attached such that the groove direction thereof is parallel to the lateral direction of the top plate (front-back direction of the drawing). Note that FIG.
8'is a guide receiving block arranged on an extension of the guide receiving block 8 in the lateral direction of the top plate. Although not shown, a guide receiving block arranged on the extension of the guide receiving block 9 in the lateral direction of the top plate is arranged on the surface of the upper base 7.

The lower frame 20 has a guide 2 on its lower surface.
1 and 22 are attached in parallel with the lateral direction of the top plate, the guide 21 forms a guide receiving block 8 and a guide receiving block 8'combined therewith, and the guide 22 forms a guide receiving block 9 and a pair thereof. It is movably engaged with the guide receiving block. Therefore, the lower frame 20
Is supported by the upper base 7 so as to be movable along the guides 21 and 22 in the direction of arrow AB (short direction of the top plate). A part of the lower frame 20 and a part of the chain 12 are connected to each other by the coupling tool 1
The lower frame 20 is driven in the directions of arrows AB in accordance with the forward and reverse rotations of the motor 10.

A motor 23 is mounted on one side surface of the lower frame 20 so that the motor 10 and the drive shaft are orthogonal to each other, and a sprocket 24 is connected to the drive shaft of the motor 23. Further, pulleys 25 and 26 are rotatably supported on one side surface of the lower frame 20 so as to be separated from each other. The chain 28 includes a sprocket 24, a pulley 25,
26 and an auxiliary pulley 27 for adjusting the tension of the chain 28, and is circulated and driven according to the forward and reverse rotations of the motor 23.

On the surface of the lower frame 20, guide receiving blocks 29, 30 having a concave cross section are attached so that the groove direction thereof is parallel to the longitudinal direction of the top plate (the left-right direction on the paper), and the lower surface of the upper frame 31 is topped. A guide 32 mounted parallel to the plate longitudinal direction is movably engaged. Upper frame 31
Part of the chain 28 and a part of the chain 28 are connected by a connector 33, and the upper frame 31 is in the direction of arrow C-D according to the forward and reverse rotation of the motor 23 attached to the lower frame 20 (the top plate longitudinal direction). ) Is driven.

Like the lower frame 20, a motor 34 is attached to one side surface of the upper frame 31,
A sprocket 35 is connected to the drive shaft of the motor 34. Further, pulleys 36 and 37 are spaced apart and pivotally supported on one side surface of the upper frame 31, and the chain 39
Are wound around a sprocket 35, pulleys 36 and 37, and an auxiliary pulley 38 for adjusting the tension of the chain 39, and are circulated and driven according to the forward and reverse rotation of the motor 34.

A rail 40 is mounted on the surface of the upper frame 31 in parallel with the longitudinal direction of the top plate, and a top plate 41 is movably supported along the rail 40 via wheels 42, 43 and 44. ing. A part of the top plate 41 and a part of the chain 39 are connected by a connecting member 45.
1 is driven in the direction of arrows CD (longitudinal direction of the top plate) in accordance with the forward and reverse rotations of the motor 34 attached to the upper frame 31.

The foot switch 5 shown in FIGS. 3 and 4
0 is a switch for the operator to move and adjust the lower frame 20 in the directions of arrows AB and the direction of the upper frame 31 in the directions of arrows CD, and hinge switches 51 are provided at the front, rear, left and right ends of the cross-shaped board 59. , 52, 53, 54 are arranged. A concave block 60 having a concave cross-section is attached to a substantially central portion of the substrate 59, and a convex convex cross-section provided at a substantially central portion of a disc-shaped step plate 60 that receives a foot F of an operator in the concave portion. The convex portion of the block 61 is installed so as to be tiltable. As a result, the step plate 60 is
It is supported so as to be tiltable in the front, rear, left, and right directions with the installation point of 0 and the convex block 61 as a fulcrum. When the tread plate 60 is tilted forward and backward, the lower surface of the tread plate 60 is hinged switch 51 or 5
2 is selectively turned on, and when tilted to the left or right, the lower surface of the footboard 60 selectively turns on the hinge switch 53 or 54. It should be noted that springs 62 and 63 are sandwiched between the board 59 and the step board 60 in a contracted state, and keep the board 59 and the step board 60 horizontal when stable. The hinge switches 51, 52, 53, 54 are connected to the control circuit 55, and the amplifier 5 is connected from the control circuit 55.
The motor 10 for driving the lower frame 20 is connected via 6 and the upper frame 31 is also connected via the amplifier 57.
A driving motor 23 is connected.

Next, the operation of the bed thus constructed will be described. The operation of the bed is performed, for example, in a state where the operator stands on the side of the bed and puts one foot on the step board 60 of the foot switch 50 as shown in FIG. Step 60
When is tilted forward, the hinge switch 51 is turned on,
During the ON period, the control circuit 55 outputs a forward rotation drive signal. The drive signal is amplified by the amplifier 56 and then supplied to the motor 10 to drive the motor 10 in the forward rotation. Referring again to FIG. 2, when the motor 10 rotates in the counterclockwise direction, the sprocket 11 rotates in response to the rotation, and the rotational movement of the sprocket 11 is transmitted to the chain 12, and the chain 12 is circularly driven in the direction of arrow A. The lower frame 20 is moved in the direction of arrow A according to the driving of the chain 12, and the upper frame 31 and the top plate 41 are also moved in the direction of arrow A accordingly. When the platform 60 is returned and the hinge switch 51 is turned off, the output of the drive signal from the control circuit 55 stops, the lower frame 20 stops accordingly, and the upper frame 31 and the top plate 41 also stop. On the other hand, when the platform 60 is tilted backward and the hinge switch 52 is turned on, the operation opposite to the above operation is performed during the on period, the motor 10 rotates in the reverse direction in the clockwise direction, and the chain 12 accordingly moves. The lower frame 20 is cyclically driven in the direction of arrow B, and the lower frame 20 is moved in the direction of arrow B according to the driving of the chain 12, and accordingly, the upper frame 31 and the top plate 4 are moved.
1 is also moved in the direction of arrow B.

When the step 60 is tilted to the left,
The hinge switch 53 is turned on, a forward rotation drive signal is output from the control circuit 55 during the ON period, is amplified by the amplifier 57, is then supplied to the motor 23, and the motor 23 is driven in forward rotation. The sprocket 24 rotates forward in accordance with the rotation of the motor 23, the rotational motion thereof is transmitted to the chain 28, the chain 28 is circulatively driven in the direction of arrow C, and the upper frame 31 is driven by the arrow C in response to the drive of the chain 28.
The top plate 41 is also moved in the arrow C direction. When the platform 60 is returned and the hinge switch 53 is turned off, the output of the drive signal from the control circuit 55 stops, the upper frame 31 stops accordingly, and the top plate 41 also stops accordingly. On the other hand, when the platform 60 is tilted to the right and the hinge switch 54 is turned on,
During the ON period, the operation reverse to the above operation is performed, and the motor 31 rotates in the reverse direction in the clockwise direction, and accordingly the chain 2
8 is circularly driven in the direction of arrow D, and the upper frame 31 is moved in the direction of arrow D according to the driving of the chain 28 thereof.
Along with that, the top plate 41 is also moved in the arrow D direction.

As described above, according to this embodiment, since the lower frame is supported on the upper base of the elevating unit so as to be movable in the lateral direction of the top plate, it is placed on the top plate. When the subject is misaligned with respect to the center of the imaging area of the computer tomography apparatus, the lower frame can be moved along the guide, which is a hassle of holding and shifting the subject from the top plate as in the conventional case. Can be resolved. Further, since the foot switch is used in this embodiment, both hands of the operator can be released. Further, since the structure in which the upper frame is supported by the lower frame so as to be movable in the longitudinal direction of the tabletop is adopted, the tabletop stroke can be increased as compared with the bed in which only the tabletop moves. Further, since the movement of the upper frame and the lower frame is electrically operated, it is suitable for remote operation. The present invention is not limited to the above-described embodiments, and various modifications can be made to the embodiments.

[0019]

As described above, the bed according to the present invention is characterized by including the support base and the top plate supported by the support base so as to be movable in the lateral direction. When the extension line of the and the axis of the subject are misaligned, the misalignment can be easily corrected by moving the tabletop in the lateral direction, and therefore the operator can correct it by watching the misalignment. Therefore, it is possible to eliminate the troublesomeness that the instruction of the operator is not accurately transmitted to the subject and the heavy labor of holding the subject whose limbs are inconvenient as in the past.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the present invention.

FIG. 2 is a front view of the upper base and the lower frame of the lifting unit shown in FIG. 1 as seen from the direction a.

FIG. 3 is a configuration diagram of a drive circuit that drives the motor for driving the lower frame and the motor for driving the upper frame shown in FIG. 1.

FIG. 4 is a side view of the foot switch shown in FIG.

FIG. 5 is an external view of the bed according to the present embodiment.

FIG. 6 is an external view of a conventional bed.

[Explanation of symbols]

1 ... Lifting unit, 2 ... Lower base, 3, 4 ... Rod, 5
… Pins, 6… Hydraulic cylinders, 7… Upper base, 8, 9, 2
9, 30 ... Guide receiving block 21, 22, 32 ... Guide, 10 ... Lower frame drive motor 11, 24,
35 ... Sprocket, 12, 28, 39 ... Chain, 1
3, 33, 45 ... Coupling portion, 14, 15, 25, 26, 3
6, 37 ... Pulley, 16, 27, 38 ... Auxiliary pulley, 2
0 ... lower frame, 23 ... upper frame drive motor,
31 ... Upper frame, 34 ... Top plate driving motor, 40 ...
Rails, 41 ... Top plate, 42, 43, 44 ... Wheels.

Claims (2)

[Claims] 1. A bed comprising a support base and a top plate supported by the support base so as to be movable in the lateral direction. 2. The bed according to claim 1, wherein the tabletop is electrically driven and moved.