JP5598586B2 - Fluoroscopic table - Google Patents

Description

  The present invention relates to a fluoroscopic imaging table used for X-ray fluoroscopic imaging.

  An X-ray fluoroscopic imaging apparatus irradiates a subject placed on an imaging platform called a top board with X-rays from above, and transmits X-rays to a film or a digital recording device built under the top board. A line image is captured and recorded, and examination information of a subject (hereinafter referred to as a patient) is obtained. Depending on the purpose of imaging, the top board is provided with a structure for moving and rotating to the optimal posture by the operation of the surgeon who manages the whole measurement, and an incidental structure such as a shoulder pad that holds the shoulder position of the patient, A fluoroscopic table is constructed. Hereinafter, the X-ray fluoroscopic apparatus will be described simply as an apparatus.

  FIG. 4 shows the positional relationship between the standing top board 2 and the floor G when the patient 1 gets in and out of the apparatus. The patient 1 gets on the step 3 below the top board 2, and then the top board 2 moves to a posture according to the photographing purpose as described above, and photographing is started. It should be noted that the transfer work is performed with the top 2 placed in a horizontal position when changing the movement of a patient who is inoperable.

  Depending on the purpose, a posture in which the patient's head is lowered from the leg or a posture in which the body is twisted is required, and the device is provided with means for maintaining an unnatural posture of the patient in these postures.

  Specifically, as shown in FIG. 5, the top plate 2 is provided with an upper grip bar 4, a left shoulder pad 5, a right shoulder pad 6, a left grip bar 7, a right grip bar 8 and the like as required (for example, (See Patent Document 1 to Patent Document 4). Hereinafter, the posture in which the head of the patient 1 is lowered from the leg is referred to as reverse tilt. Further, when it is not necessary to distinguish between the left shoulder pad 5 and the right shoulder pad 6, they are abbreviated as shoulder pads.

  If necessary, the shoulder abutment advances from above the patient's head placed on the top board 2 toward the shoulder, touches the shoulder and holds the patient's posture during reverse tilting. Retreats to the end of the top plate 2.

  Hereafter, the head direction of the patient 1 in the top plate 2 is the top plate top direction, the end is the top plate top end, the patient 1's leg direction of the top plate 2 is the top plate bottom direction, and the end is the top plate bottom At the end, the left shoulder direction of the patient 1 in the supine posture on the top board 2 is referred to as the top board left direction, and the right shoulder direction is referred to as the top board right direction. It is also referred to as movement including forward and backward movement of the shoulder strap. The movement is performed manually or automatically according to the specifications of the apparatus. Hereinafter, an automatic case having an electric drive source will be described.

  In general, the shoulder rest is driven separately from the left and right by the left and right drive sources. The position of the left shoulder 5 and right shoulder 6 in the horizontal direction of the top plate 2 is finely adjusted manually by the operator in advance according to the shoulder width of the patient 1. The upper grip bar 4, the left grip bar 7, and the right grip bar 8 are gripped by the patient 1 with palms according to the operator's instructions.

  FIG. 6 is a view of the top plate 2 as viewed from above the horizontal top plate 2 and shows a driving mechanism of the shoulder abutment body. An accessory rail 9L and an accessory rail 9R are provided at the left and right ends of the top plate 2, and the left drive unit LD is placed on the top plate of the accessory rail 9L.

  An electric motor LM is fixed to the upper end of the top plate of the left driving unit LD, and the left screw rod 10 that has been subjected to male threading is rotated by the rotation of the electric motor LM. Since the left shoulder support 5 and the left drive part LD are connected via the shoulder support base 11 that has been threaded into the male screw, the left shoulder support 5 is moved by the rotation of the electric motor LM. Hereinafter, the rotation direction of the electric motor LM and the left screw rod 10 when the left shoulder support 5 moves forward is referred to as normal rotation, and the rotation direction when retracted is referred to as reverse rotation.

  A right drive part RD having a structure similar to that of the left drive part LD is placed on the top of the right accessory rail 9R, and the right shoulder rest is provided via the shoulder rest base 13 by the rotation of the motor RM and the right screw rod 12. The body 6 moves. The left driving unit LD and the right driving unit RD are electrically connected by the cable C, and the electric motor LM and the electric motor RM start or end at the same time.

  As shown in FIGS. 7A and 7B as an example of the right drive unit RD, the electric motor RM rotates in the forward direction as shown in FIG. When the shoulder support 6 contacts the shoulder of the patient 1, the beam sensor (structure not shown) disposed on the shoulder support base 13 (inside the dotted circle in FIG. 7) is turned off as shown in FIG. 7B. The electric motor RM stops. The driving sources of the shoulder straps are separate on the left and right sides, and the shoulder straps do not always move at the same speed, so it is necessary to provide a total of two beam sensors on the left and right sides.

  After the imaging, the surgeon reversely rotates the electric motor LM and the electric motor RM, and retracts the shoulder rest to the limit position (hereinafter simply referred to as the limit position) of the top plate head end of the left driving unit LD and the right driving unit RD. . In addition, the components shown with the same code | symbol in FIGS. 4-7 have the same function.

Japanese Patent Application Laid-Open No. 64-46437 Japanese Patent Laid-Open No. 1-262841 Japanese Unexamined Patent Publication No. 7-51260 JP-A-10-113346

  In the conventional structure, the shoulder supports are driven separately on the left and right sides, and as described above, there is a shift in the timing at which the left shoulder contact body 5 and the right shoulder contact body 6 contact the shoulders. It is necessary to draw out the cable C for the electric motor RM from the LD to the right drive unit RD, which complicates the apparatus.

  In addition, when the patient 1 is getting on or off, for example, in the right direction of the top board 2, the right driving unit RD protruding from the top surface of the top board 2 is in the way, and the patient 1 and the right driving unit RD are in the middle of getting on or off the board. There is a danger of contact. Although a method of removing the right drive unit RD at the time of getting on and off or changing the transfer has been proposed, this method needs to remove the connection between the cable C and the right drive unit RD before removing the right drive unit RD every time the transfer is performed. In addition, since the weight and dimensions are excessive for manual removal and transportation of the right drive unit RD, quick work is difficult, and the burden on the operator at the site is increased.

For fluoroscopic imaging table provided by the present invention to solve the above problems, a top plate for placing a patient, and rotatably supported left and right support plates with respect to the top plate, each of said support plate Each of the shoulder holders is connected via a flexible belt, and the belt is supported by an electric motor. be to orbit, the left and right shoulder rest member is moved to the top plate direction and the top plate lower direction of the top plate, head direction of the top plate of the shoulder pad of the left and right by rotating the left and right support plates And a drive means for storing in the device.
The belt is a flexible ring and does not expand and contract in the circumferential direction of the ring, and simultaneously transmits the driving force of one electric motor to the left and right shoulder pads. To do.

  By transmitting the driving force to the shoulder straps via the belt, the left and right shoulder straps can be moved simultaneously with a single drive source, and there is also one beam sensor that detects the contact between the shoulder straps and the shoulder and stops moving forward. In addition, the structure for electrically interconnecting the conventional left and right separate driving devices is also eliminated, and the device is simplified.

  In addition, the transmission of the driving force through the belt makes it possible to perform a two-stage folding process that includes the rotation of the shoulder pad at the end of the image taking, and there has been a risk of contact with the patient when the patient gets on and off or changes the transfer. A shoulder abutment body drive mechanism is accommodated in the top plate head end together with the shoulder abutment body and the substrate on which the shoulder abutment body is placed.

  Therefore, when the patient gets on and off, there is no protrusion on the top plate around the patient, and there is no need to remove the conventional heavy weight / size drive mechanism, and the shoulder contact body drive mechanism set of the present invention is fixed to the top plate. And the apparatus is simplified. Furthermore, it is possible to always get on and off the patient safely and quickly.

It is a top view of the top plate which shows the Example of this invention. It is an enlarged view of the shoulder rest part of the top plate of the present invention. It is a perspective view which shows the structure and operation example of the shoulder contact body drive mechanism of this invention. It is a figure which shows the top plate of the standing position at the time of getting on and off of the patient in the conventional apparatus. It is a perspective view which shows the shoulder pad and the grip stick in the conventional apparatus. It is a top view which shows the structure of the top-plate part of the conventional apparatus. It is a figure which shows the structure for the shoulder abutment body movement stop in the conventional apparatus.

  An X-ray fluoroscopic apparatus irradiates a patient placed on an imaging table called a top board with X-rays from above and transmits a X-ray image on a film or a digital recording device built under the top board. Is taken and recorded to obtain patient examination information. The top board is provided with a structure for moving / rotating the patient to an optimum posture and an incidental structure such as a shoulder abutment for holding the shoulder position of the patient according to the purpose of photographing, and constitutes a fluoroscopic photographing table.

  FIG. 1 is a top view of a horizontal top board 2N on which a patient 1 is placed in the fluoroscopic table of the present invention. Hereinafter, the head direction of the patient 1 on the top 2N is the top top direction, the end is the top top end, the patient 1 leg direction of the top 2N is the top bottom direction, and the end is the top bottom At the end, the left shoulder direction of the patient 1 in a supine posture on the top board 2N is referred to as the left side of the top board, and the right shoulder direction is referred to as the right side of the top board.

  At the lower end of the top plate, a step 3N for getting on and off the patient 1 to and from the standing top plate 2N is disposed. An X-ray generator (not shown) disposed vertically above the horizontal top plate 2N is irradiated with X-rays, passes through the patient 1, and is a film or digital recording device (below the top plate surface). A transmission X-ray image is captured and recorded on a non-illustrated). The top plate 2N is moved and rotated to an optimal posture according to the imaging purpose by an operator's operation for managing the whole measurement.

  At the upper end of the top plate of the top plate 2N, a drive sprocket 22 that is directly connected to an electric motor (not shown in FIG. 1) disposed below the top plate surface and meshed with the chain 21, and the engagement between the chain 21 and the drive sprocket 22 is engaged. An auxiliary sprocket 22p and an auxiliary sprocket 22s for securing the above are disposed. The chain corresponds to the band described in claim 1. Details of the structure and operation of the drive unit including the chain 21 and the drive sprocket 22 will be described later with reference to FIGS.

  In FIG. 1, the chain 21 goes around from the drive sprocket 22 via a sprocket 23, a sprocket 24, a sprocket 25, a sprocket 26, a sprocket 27, and a sprocket 28.

  The sprocket 24 or the sprocket 27 is disposed on the upper surface of the substrate 29 or the substrate 30, respectively, and the position of the rotation shaft is fixed to the top plate 2N. The substrate 29 or the substrate 30 is disposed so as to be rotatable in the horizontal direction with respect to the top plate 2N around the second fulcrum LT or the second fulcrum RT coaxial with the rotation axis of the sprocket 24 or 27, respectively.

  In addition to the chain 21, the chain 31 or the chain 32 is coaxially engaged with the sprocket 24 or the sprocket 27. When the chain 21 is moved by the rotation of the drive sprocket 22, the movement is transmitted via the sprocket 24 or the sprocket 27, respectively. It is transmitted to the chain 31 or the chain 32.

  The chain 31 or the chain 32 goes around to the sprocket 24 or the sprocket 27 via the sprocket 33 or the sprocket 34 disposed on the substrate 29 or the substrate 30, respectively.

  On the substrate 29 or the substrate 30, a linear guide LL or a linear guide RL is fixed, and an arm support plate 35 or an arm support plate 36 that slides linearly along each linear guide is disposed. The arm support plate 35 or the arm support plate 36 is fixed to the chain 31 or the chain 32. Details of the fixed portion will be described later with reference to FIG.

  The arm support plate 35 is provided with an arm 37 rotatable around the first fulcrum LS and a left shoulder abutment body 5N supported by the arm 37. The arm support plate 36 is provided with an arm 38 that can rotate about the first fulcrum RS and a right shoulder abutment body 6N supported by the arm 38.

  In order to fix the left shoulder support 5N or the right shoulder support 6N with respect to the arm 37 or the arm 38 at the angle shown in FIG. 1, the arm 37 and the arm support plate 35 or the arm 38 and the arm support plate 36 can be inserted and removed. A pin (not shown, hereinafter referred to as pin PA) is used.

  Further, in order to fix the substrate 29 or the substrate 30 to the position of FIG. 1 with respect to the top plate 2N, a detachable pin (not shown, hereinafter) that penetrates the substrate 29 and the top plate 2N or the substrate 30 and the top plate 2N. Pins PB) are used in the lower direction of the top plate of the substrate 29 or the substrate 30.

  Next, taking the right shoulder member 6N as an example, the storing operation of the shoulder member after the end of photographing will be described. After the photographing is finished, first, the pin PA that fixes the position of the right shoulder support 6N with respect to the arm support plate 36 is manually removed, and the right shoulder support 6N and the arm 38 as shown by symbol A in FIG. Is rotated around the first fulcrum RS in a direction away from the shoulder.

  Next, the drive sprocket 22 is rotated clockwise, and the arm support plate 36 is retracted from the shoulder in the direction of symbol B. Finally, the pin PB that fixes the substrate 30 to the top plate 2N is manually removed, and the substrate 30 including the right shoulder abutment 6N is rotated counterclockwise as indicated by symbol C to Store in the direction. In FIG. 1 to FIG. 3, the position of the substrate 30 after storage is indicated by a dotted line.

  FIG. 2 is an enlarged view of the shoulder abutment portion of the top plate 2N in FIG. 1, and the structure and operation of components having the same reference numerals as those in FIG. 1 are the same as those in FIG. The arm support plate 35 and the arm support plate 36 are respectively fixed to the chain 31 and the chain 32 by the chain fixture 39 and the chain fixture 41 fixed to the arm support plate 35 and the arm support plate 36. It is transmitted to each arm support plate.

  The sliding tool 40 and the sliding tool 42 fixed to the arm support plate 35 and the arm support plate 36 are slidably disposed with the linear guide LL and the linear guide RL, respectively. The arm support plate 35 and the arm support plate 36 are linearly guided. It is moved in a direction along LL and linear guide RL.

  The movement of the arm support plate 35 and the arm support plate 36 will be further described with reference to FIG.

  FIG. 3 shows a structure in the vicinity of the substrate 30 including the right shoulder rest 6N. The chain 21 is driven by a drive sprocket 22 directly connected to the electric motor M. The arm support plate 36 is fixed to the inner side of the chain 32 (side closer to the patient 1) by the chain fixing tool 41, and the arm support plate 36 is fixed to the linear guide RL by the slide tool 42 fixed to the arm support plate 36. Since the drive sprocket 22 is rotated counterclockwise, the arm support plate 36 moves forward in the lower direction of the top plate.

  After the photographing is finished, the board 30 is housed in the position indicated by the dotted line in FIGS. 1 to 3 by sliding on the board 30 and rotating in two stages together with the right shoulder 6N as described above.

  2 and 3, the chain fixture 41 holds the inner side (patient 1 side) of the chain 32. However, since the rotation directions of the sprocket 24 and the sprocket 27 are the same direction, the left shoulder body 5N and the right shoulder body. In order to simultaneously advance or retract 6N, on the side of the substrate 29, the chain fixture 39 holds the outside of the chain 31 (the side far from the patient 1) (see FIG. 2). Except for this, the structure and operation on the substrate 29 side are symmetric with respect to the substrate 30 side, and therefore detailed description on the substrate 29 side is omitted in FIG.

  The present invention is not limited to the above-described embodiments, and various modified embodiments are possible. For example, in the embodiment, the fixing means such as the arm 38 and the arm support plate 36, the substrate 30 and the top plate 2N are described as manual pins in FIG. 1, but the insertion / removal operation of the pins is performed as an appropriate automatic operation according to an operator's operation command. Alternatively, an appropriate lock structure may be used instead of the pin.

  In the description of the embodiment, the rotation means of the arm 37, the arm 38, the substrate 29, and the substrate 30 is not mentioned, but either automatic or manual means can be applied depending on an appropriate structure. Although a beam sensor is cited as a sensor for detecting the contact of the shoulder pad with the patient 1, a detector based on another principle such as a micro switch may be used as long as the contact can be detected.

  In FIG. 3, the rotating shaft of the motor M and the drive sprocket 22 are directly connected, but an appropriate speed reduction mechanism may be provided in the middle. Further, a structure in which one of the sprockets other than the drive sprocket 22 is used as a drive source and the drive sprocket 22, the auxiliary sprocket 22p, and the sprocket 22s are removed is also conceivable.

  From the rotational direction of each sprocket, in the embodiment, on the chain 31 side, the arm support plate 35 and the chain 31 are fixed on the outside of the chain 31, and on the chain 32 side, the arm support plate 36 and the chain 32 are fixed on the inside of the chain 32. As described above, it is also possible to reverse the rotation direction of the chain 31 and the chain 32 by an appropriate combination of intermediate sprockets so that the fixing positions are aligned outside or inside each chain.

  In FIG. 1, the step 3N is described as being fixed to the top 2N. However, the step 3N may be movable so that the shoulder position of the patient 1 can be adjusted. The chain can be replaced by a timing belt, for example, and the driving force transmission medium of the present invention is not limited to the chain. The present invention includes all of these.

1 Patient 2N Top plate 3N Step 5N Left shoulder base 6N Right shoulder base 21 Chain 22 Drive sprocket 22p Auxiliary sprocket 22s Auxiliary sprocket 23 Sprocket 24 Sprocket 25 Sprocket 26 Sprocket 27 Sprocket 28 Sprocket 29 Substrate 30 Substrate 31 Chain 32 Chain 33 Sprocket 34 Sprocket 35 arm support plate 36 arm support plate 37 arm 38 arm 39 chain fixture 40 slide fixture 41 chain fixture 42 slide fixture C cable LL linear guide LS first fulcrum LT second fulcrum M motor RL linear guide RS first fulcrum RT first 2 fulcrums

Claims (2)

A top plate on which the patient is placed ;
And left and right support plate rotatably supported with respect to the top plate,
Left and right shoulder pads supported to be parallel to each of the support plates ;
In a fluoroscopy table equipped with
Each of the shoulder pads is connected via a flexible band ,
By rotating the belt with an electric motor, the left and right shoulder plates are moved in the top plate upper direction and the top plate lower direction of the top plate, and the left and right shoulder plates are rotated by rotating the left and right support plates. Drive means for storing in the head direction of the top plate ;
A fluoroscopic imaging stand characterized by the provision of The band is a flexible ring and does not expand and contract in the circumferential direction of the ring, and transmits the driving force of one electric motor to the left and right shoulders simultaneously. The fluoroscopic imaging stand according to claim 1.

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