JP5656487B2 - Medical bed apparatus and medical imaging apparatus - Google Patents

Description

  Embodiments of the present invention are, for example, an X-ray imaging apparatus, an X-ray CT apparatus, a magnetic resonance imaging apparatus, a nuclear medicine apparatus, and the like. The present invention relates to a medical imaging apparatus including a bed apparatus.

  Recently, diagnostic imaging techniques in medical imaging devices (hereinafter simply referred to as “imaging devices”) such as X-ray imaging devices, X-ray CT devices, magnetic resonance imaging devices, and nuclear medicine devices have been developed in computer technology. Along with this, it has made rapid progress and is indispensable for today's medical care.

  These image capturing apparatuses include a medical couch device having a top plate on which the subject is placed, and by sliding the top plate in the longitudinal direction, the imaging position where the subject is desired by the image capturing device. Can lead to. As a structure of the medical bed apparatus having this slidable top plate, for example, the structure described in Patent Document 1 is known.

  In the mechanism for sliding the top plate described in Patent Document 1, for example, a motor and a belt driven by the motor are arranged, and a part of the belt is fixed to the top plate. Since the motor is driven forward and backward as necessary, the belt is reciprocated according to the driving direction of the motor, and the top plate is slidably moved according to the moving direction of the belt.

JP 7-148150 A

  By the way, when an image of the subject is captured by the image capturing device, for example, when an emergency such as a power failure or a device failure occurs, the top plate in the image capturing device is removed from the image capturing device side. It is necessary to evacuate. In such a case, the non-excitation actuating brake provided on the motor side of the driving force transmission mechanism is mechanically released to manually move the top plate. However, when the belt is fixed to the top plate, the load of the drive system such as the belt and the frame is large. Therefore, a large operating force is required to manually move the top plate.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to reduce a load when the top plate is manually moved, for example.

According to the present embodiment , the first driving force transmission mechanism provided on the base so as to be slidable in the longitudinal direction on the base, the driving force from the second driving force transmission mechanism, and the second driving force transmission mechanism. The first driving force transmission mechanism that transmits the driving force to the top plate that is slidable in the longitudinal direction on the two driving force transmission mechanisms, and the first driving force transmission mechanism and the top plate are attached and detached. The first driving force transmission mechanism , comprising: a coupling means for coupling freely; and an operation unit provided so that at least a part protrudes from a part of the top plate on which the subject is placed. In the case of releasing the transmission, the coupling of the coupling means is released by pushing down the operation unit .

It is the figure which showed the outline of the whole structure of a magnetic resonance imaging apparatus as an example of a medical image imaging device. It is the perspective view which looked at the top plate which concerns on embodiment of the medical bed apparatus from the upper surface side. It is the front view of the top plate which looked at FIG. 2 from the arrow A direction. It is a perspective view of the top plate seen from the lower surface side of FIG. It is the figure which expanded the B section of FIG. 2 which shows the cancellation | release state of the coupling | bonding by a coupling | bond part. It is the figure which expanded the C section of FIG. 3 which shows the cancellation | release state of the coupling | bonding by a coupling | bond part. It is sectional drawing which follows the arrow EE line of FIG. It is the figure which expanded the D section of FIG. 4 which shows the cancellation | release state of the coupling | bonding by a coupling | bond part. FIG. 6 is a diagram corresponding to FIG. 5 and illustrating a coupling state by a coupling unit. FIG. 7 is a diagram corresponding to FIG. 6 and illustrating a coupling state by a coupling unit. It is sectional drawing which follows the arrow FF line of FIG. It is a figure corresponding to FIG. 8 which shows the coupling | bonding state by a coupling | bond part. It is the figure explaining other embodiment of the driving force transmission mechanism of the medical bed apparatus.

  Hereinafter, the medical couch device and the image pickup device according to the embodiment of the present invention will be described in detail with reference to FIGS. 1 to 13, but prior to that, the medical couch device according to the embodiment of the present invention is included. An example of the image pickup apparatus will be described. 1 to 13, like parts are indicated by like reference numerals.

  FIG. 1 shows an outline of the configuration of a magnetic resonance imaging apparatus as an example of an image imaging apparatus. The magnetic resonance imaging apparatus 1 includes a medical bed apparatus (hereinafter simply referred to as a bed apparatus) 2, a gantry 3 that is an image pickup unit, and a control unit (not shown). Are arranged to face each other.

  The couch device 2 includes a base 4, a top plate 5 provided on the base 4 and slidably movable in the direction of the gantry 3, and a driving force transmission mechanism 6 that transmits a driving force for sliding the top plate 5. And. In addition, in order to guide the slide of the top plate 5, a pair of linear rails 8 extending in the sliding direction of the top plate 5 are provided on the upper surface of the base 4, and a sliding body that engages with the rails 8. 9 is provided on the lower surface of the top plate 5.

  The driving force transmission mechanism 6 has a motor (not shown) that drives a timing belt 11 wound around a plurality of pulleys 10a, 10b, 10c, and 10d, and slides the top plate 5 by driving this motor. is there. Therefore, a plurality of pulleys 10a to 10d are arranged so as to extend the timing belt 11 in the sliding direction of the top plate 5, and the timing belt 11 is wound around these pulleys 10a to 10d. A motor (not shown) is coupled to 10a.

  The top 5 places the subject P, sends the subject P to the opening 7 serving as the imaging space of the gantry 3 at the time of imaging, and the subject P on the base 4 after the imaging is completed. It functions to pull back upward, and a part of the timing belt 11 is detachably coupled to the back of the top plate 5 by a coupling portion 13.

  Next, the detail of the coupling | bond part 13 which couple | bonds the top plate 5 and the timing belt 11 in embodiment of a medical couch apparatus is demonstrated.

  First, the top plate 5 will be described with reference to FIGS.

  Here, FIG. 2 is a perspective view of the top plate 5 as seen from the top surface side, FIG. 3 is a front view of the top plate 5 as seen from the direction of arrow A in FIG. 2, and FIG. It is a perspective view seen from the lower surface side, and the gantry 3 shown in FIG. As shown in FIGS. 2 and 3, the top plate 5 has a flat plate shape, for example, and both end portions in the longitudinal direction are formed thick. A sliding body 9 such as a roller is provided on the lower surface of the thick end portions so that the top plate 5 can be easily moved along the rail 8. A coupling portion 13 is provided on the side.

  Next, the coupling unit 13 will be described.

  The coupling portion 13 is shown in FIG. 5 in which the portion B in FIG. 2 is enlarged, in FIG. 6 in which the portion C in FIG. 3 is enlarged, and in FIG. 8 in which the portion D in FIG. 4 is enlarged. FIG. 7 shows a cross-sectional view along the line EE. These drawings show a state in which the coupling portion 13 and the timing belt 11 are uncoupled. The state in which the coupling portion 13 and the timing belt 11 are coupled is shown in FIGS. 9 to 12 separately. This will be described later.

  As shown in FIGS. 5 to 8, the coupling portion 13 is located at the rear portion of the top plate 5, that is, at a position that does not get in the way even when the subject lies down, and is provided with the rail 8 and the sliding body 9. The position where the timing belt 11 passes is avoided. The coupling portion 13 is formed on the lower surface side of the top plate 5 so as to be in contact with the surface of the timing belt 11, and is fixed to the base portion 13a so as to be rotatable by a shaft 13b, and is formed in an L shape. A pair of engaging portions 13c and an operation portion 13d that penetrates the top plate 5 and protrudes to the upper surface side thereof are provided.

  As shown in FIG. 7, the pair of engaging portions 13 c cause an opening / closing force to act on the base portion 13 a and the timing belt 11 by a spring 13 e as an elastic portion wound around the shaft 13 b. ing. That is, one end side of the spring 13e is locked to the base portion 13a, and the other end side of the spring 13e is locked to the engaging portion 13c. FIG. 7 shows a state in which the compression of the spring 13e is released and the pair of engaging portions 13c are opened on both sides of the base portion 13a. At this time, the angle of both ends of the spring 13e is approximately 90 degrees. In this state, the spring 13e applies a force in a direction in which the engaging portion 13c is pushed open on both sides. And since the front-end | tip part of the operation part 13d is riding on the L-shaped bending part of the engaging part 13c, respectively, the operation part 13d will be in the state protruded upwards from the surface of the top plate 5. FIG.

  Also, as shown in FIG. 8, one surface of the timing belt 11 is formed in a wave shape that is regularly connected, for example. For this reason, the inner surface of the engaging portion 13 c is also formed in a wave shape having the same pitch as the wave shape formed in the timing belt 11.

  Now, although it is the coupling | bond part 13 comprised in this way, if the operation part 13d which protrudes on the surface side of the top plate 5 is pushed down, the coupling | bond part 13 and the timing belt 11 will be in the state couple | bonded. The coupling part 13 in such a coupling state is shown in FIGS. 9 corresponds to FIG. 5, FIG. 10 corresponds to FIG. 6, and FIG. 12 corresponds to FIG. FIG. 11 is a cross-sectional view taken along the line FF in FIG.

  That is, when the operation portion 13d protruding from the surface of the top plate 5 is pushed downward, the L-shaped bent portion of the engaging portion 13c on which the distal end of the operation portion 13d is riding is pushed by the distal end of the operation portion 13d. Therefore, the engaging portion 13c rotates in a closing direction around the shaft 13b. Therefore, the engaging portion 13c is rotated 90 degrees from the position shown in FIGS. Thus, by pushing down the operating portion 13d, the engaging portion 13c rotates 90 degrees about the shaft 13b, and as shown in FIGS. 10 to 12, the base portion 13a and a pair of engaging portions 13c is held so as to wrap around the timing belt 11.

  At this time, as shown in FIG. 12, the corrugated surface formed inside the engaging portion 13 c matches the corrugated surface formed on the timing belt 11. Of course, the corrugations are also fitted, and as a result, the top plate 5 and the timing belt 11 are firmly coupled.

  In a state where the engaging portion 13c is closed, both ends of the engaging portion 13c are sandwiched by the distal end portion of the operation portion 13d, and the engaging portion 13c cannot freely rotate in the opening direction. The holding state is maintained. In this state, the spring 13e is U-shaped and always exerts a force in a direction to open the engaging portion 13c. However, the force is blocked by sandwiching both sides of the engaging portion 13c with the tip of the operating portion 13d.

    As shown in FIGS. 10 and 12, a roller 13f is provided at the distal end portion of the operation portion 13d. When the operation portion 13d is pushed down, the roller 13f becomes a surface of the engagement portion 13c. Is easy to move, and the roller 13f is rotated in a direction to close the engaging portion 13c while sliding.

  By the way, when an image is picked up by the magnetic resonance imaging apparatus 1 or the like, there is a case where an emergency situation occurs, so that the top 5 may need to be retracted from the opening 7 of the gantry 3 to the base 4 side of the bed apparatus 2. . In such a case, in this embodiment, by pulling up the operation portion 13d protruding from the top surface of the top plate 5, the connection between the top plate 5 and the driving force transmission mechanism 6 is quickly released, and the top plate 5 Can be moved freely.

  That is, as shown in FIGS. 10 to 12, the engaging portion 13 c that has been coupled to the timing belt 11 is moved upward by moving the operating portion 13 d above the top plate 5. Both sides of the engaging portion 13c sandwiched between the tip portions of 13d are free, and the engaging portion 13c is opened on both sides by the repulsive force of the spring 13e that has been U-shaped until then. Therefore, the coupling between the timing belt 11 and the coupling portion 13 is released almost instantaneously, and the state shown in FIGS. 6 to 8 is restored.

  Accordingly, since the top plate 5 is in a freely movable state, the top plate 5 can be easily retracted from the opening 7 of the gantry 3 to the base 4 side of the bed apparatus 2 by an operator or the like.

  In the conventional couch device, in order to manually move the top plate in an emergency, the non-excitation actuated brake provided on the driving force transmission mechanism side is mechanically released, but in this case, Although the top plate is separated from the motor, it is directly coupled to the belt, frame, etc., so the load on these driving force transmission mechanisms is large, and a large operating force is required to move the top plate manually. It was a thing. On the other hand, according to the present embodiment, the top plate 5 and the driving force transmission mechanism 6 are detachably coupled by the coupling portion 13, and the coupling between the top plate 5 and the driving force transmission mechanism 6 is released. In this case, since the load of the driving force transmission mechanism 6 is not applied to the top plate 5, manual operation of the top plate 5 can be performed very easily with a small force. The attaching / detaching operation between the top plate 5 and the driving force transmission mechanism 6 can be easily performed by an extremely simple operation of pulling up or pushing down the operation portion 13d.

  Now, in the bed apparatus 2 according to the embodiment shown in FIG. 1, the pulley 10 c and the pulley 10 d as the driving force transmission mechanism 6 are installed at an interval substantially close to the width dimension of the base 4. Then, the top plate 5 is coupled to the timing belt 11 moving between them by a coupling portion 13. Therefore, the movement range of the top plate 5 is limited between the pulley 10c and the pulley 10d. For this reason, the range of movement of the top plate 5 with respect to the gantry 3 could not be widened. However, when the image capturing apparatus is, for example, a magnetic resonance imaging apparatus, since the length of the gantry 3 is long, it is necessary to further widen the movement range of the top 5. Therefore, in such a case, it is possible to widen the movement range of the top plate 5 by providing the top plate driving force transmission mechanism in a plurality of stages.

  FIG. 13 shows a schematic configuration of a bed apparatus having two stages of driving force transmission mechanisms.

  In FIG. 13, the driving force transmission mechanism 6 in the first stage is the same as that shown in FIG. However, in FIG. 13, what is indicated by reference numeral 6a is a motor, a non-excitation actuating brake or the like not shown in FIG. The second-stage driving force transmission mechanism 60 is placed on the first-stage driving force transmission mechanism 6, and the top plate 5 is further placed on the second-stage driving force transmission mechanism 60. It can be moved in the longitudinal direction.

  The second stage driving force transmission mechanism 60 is provided with pulleys 61 and 62 at both ends, and a timing belt 63 is wound around the pulleys 61 and 62. The timing belt 63 can freely reciprocate between the pulleys 61 and 62. The second-stage driving force transmission mechanism 60 is coupled to the timing belt 11 of the first-stage driving force transmission mechanism 6. A timing belt 63 positioned on the lower side between the pulleys 61 and 62 is coupled to the first-stage driving force transmission mechanism 6, and the timing belt 63 positioned on the upper side is connected to the top plate 5 by the coupling portion 13. It is detachably connected.

  In this way, when the first-stage driving force transmission mechanism 6 is driven by providing the first-stage driving force transmission mechanism 6 and the second-stage driving force transmission mechanism 60, the timing belt 11 The second stage driving force transmission mechanism 60 moves in the longitudinal direction of the top plate 5 on the first stage driving force transmission mechanism 6. Here, since the timing belt 63 of the second-stage driving force transmission mechanism 60 is coupled to the first-stage driving force transmission mechanism 6, the timing belt 63 becomes a pulley when the second-stage driving force transmission mechanism 60 moves. It moves between 61 and 62. However, the moving direction of the timing belt 63 is opposite to the moving direction of the second stage driving force transmission mechanism 60 on the lower side between the illustrated pulleys 61 and 62, and on the upper side between the pulleys 61 and 62. The direction is the same as the moving direction of the second-stage driving force transmission mechanism 60.

  Therefore, the moving range of the top plate 5 can be increased by the amount of the second-stage driving force transmission mechanism 60 interposed, and the image pickup apparatus has a long gantry 3 such as a magnetic resonance imaging apparatus. Also, the top plate 5 can be moved in a desired range. Note that the coupling between the top plate 5 and the driving force transmission mechanism 60 can be easily released by operating the coupling unit 13 in an emergency or the like. And when a coupling | bonding is cancelled | released, the top plate 5 can be freely moved manually.

  It should be noted that the top plate 5 that has been uncoupled can freely move within the opening 7 of the gantry 3, so that the top plate 5 is expected to drop off from the tip of the gantry 3. In order to prevent such inconvenience, a mechanical stopper 71 may be provided on the distal end side of the opening 7 of the gantry 3.

  As described above in detail, according to this embodiment, when the top plate 5 and the timing belt 11 or the timing belt 63 are detachably coupled by the coupling portion 13 and the coupling is released, the driving force transmission mechanism The load is not applied to the top board. Therefore, manual operation of the top plate can be performed very easily, and the top plate can be quickly withdrawn from the imaging device side in the event of an emergency such as a power failure. Can be minimized.

  In addition, although embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. For example, the timing belt may be a chain or a wire. These embodiments and modifications thereof are included in the scope and spirit of the invention, and are also included in the invention described in the claims and their equivalents.

DESCRIPTION OF SYMBOLS 1 Magnetic resonance imaging apparatus 2 Medical bed apparatus 3 Gantry 4 Base 5 Top plate 6 Driving force transmission mechanism 7 Opening part 8 Rail 9 Sliding body 10a-10d Pulley 11 Timing belt 13 Joint part 13a Base part 13b Shaft 13c Engagement part 13d Operation Part 13e Spring 13f Roller

Claims (3)

Base and
A second driving force transmission mechanism provided on the base so as to be slidable in the longitudinal direction;
A first driving force transmission mechanism that receives a driving force from the second driving force transmission mechanism and transmits the driving force to a top plate that is slidable in the longitudinal direction on the second driving force transmission mechanism. When,
Coupling means for detachably coupling the first driving force transmission mechanism and the top plate;
An operation unit provided on a part of the surface side on which the subject of the top plate is placed so that at least a part protrudes;
Said first driving force when canceling the transmission of the transmission mechanism, medical Ryoyo bed apparatus, characterized in that to release the coupling of said coupling means by pushing down the operation part. The coupling means includes
A base fixed to the top plate;
An engaging portion attached to the base and detachable from the first driving force transmission mechanism;
An elastic portion that exerts a force on the attachment and detachment of the engagement portion and the first driving force transmission mechanism;
The operation unit operates to release a coupling state between the engagement unit and the first driving force transmission mechanism against the force of the elastic unit by pushing down the operation unit. Item 2. The medical couch device according to Item 1. The medical couch device according to claim 1 or 2,
An image capturing unit that captures a medical image of a subject placed on the top plate of the medical bed apparatus;
A medical imaging apparatus comprising:

Images