X-ray imaging apparatus

Abstract

To prevent an image receiving part from being lowered against the intention of an operator during motor-driven lifting or stopping in an X-ray imaging apparatus in which the image receiving part can be vertically moved by a motor or manually.SOLUTION: The device is provided with a device main body 2 vertically movably supported by a column 8, a counter balance mechanism for vertically moving the device main body manually, and a driving mechanism for vertically moving the device main body electrically, and the counter balance mechanism is constituted by connecting the device main body to one end of a first transmission means 11 wound around a first rotary body 10 and connecting a counter weight 12 to the other end. The driving mechanism is provided with a second transmission means 14 for connecting the driven side turning body 15 and the driving side turning body 16 and locking the device main body, and a turning mechanism for turning the driving side turning body, and the turning mechanism has a torque limiter hub 25 provided around the outer periphery of a driving shaft 22 and the driving side turning body provided around the outer periphery of the torque limiter hub, and a one-way clutch 29 is built in the inner periphery of the driving side turning body.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an X-ray imaging device that uses X-rays to image the inside of a human body, and more particularly to a standing-type X-ray imaging device that images a subject in a standing position, in which the device body having an image receiving unit that images the inside of the human body can be moved either electrically or manually. [Background technology]

[0002] 2. Description of the Related Art Conventionally, X-ray imaging apparatuses that use X-rays to image the inside of the human body have been widely used in the medical field, and among these X-ray imaging apparatuses, there is a standing type that images a person as a subject while he or she is standing.

[0003] Generally, upright X-ray imaging devices are equipped with an image receiving unit that houses cassettes containing film for imaging and photoreceptors containing image pickup elements, etc., which can be inserted and removed freely. This image receiving unit is supported on a support column so that it can move up and down freely. There are two methods for moving the image receiving unit up and down: one is to move it electrically using a motor, and the other is to move it manually using a counterbalance mechanism.

[0004] While the method of electrically moving the image receiving unit up and down has the advantage of not requiring any labor, the speed of movement is slowed down to ensure safety, so for example, if the image receiving unit is at the bottom, it takes time to move it up, which can result in poor work efficiency.On the other hand, the method of manually moving the image receiving unit up and down allows the operator to move the image receiving unit quickly at will, but has the problem of requiring labor.

[0005] For this reason, the applicant has previously proposed an X-ray imaging device that allows the image receiving unit to be moved up and down either electrically or manually, thereby making it possible to switch between electrically and manually moving the image receiving unit up and down depending on the situation at hand.

[0006] Here, an X-ray imaging device that allows the up and down movement of the image receiving unit to be switched between electric and manual will be explained with reference to the drawings. Figure 3 is a front perspective view of an X-ray imaging device that allows the up and down movement of the image receiving unit to be switched between electric and manual, and in the figure, reference numeral 1 is a conventional X-ray imaging device.

[0007] The X-ray imaging device 1 shown in Figure 3 has a support 8 and an apparatus main body 2 supported on this support 8 so that it can move freely in the vertical direction, and the apparatus main body 2 has an image receiving unit 3 that can freely accommodate a cassette that contains a film for imaging that is exposed to X-rays, and a photoreceptor such as an image sensor, which can be inserted and removed.

[0008] 6 is a front view of the interior of support pillar 8, and a main shaft 9 is provided in the upper part of support pillar 8, connecting the left and right side walls of support pillar 8, and a wire 11 is wound around this main shaft 9 via a pulley 10, which is rotatable. One end of wire 11 is connected to movable plate 703 on which device main body 2 is attached, and the other end of wire 11 is connected to counterweight 12, so that device main body 2 can be manually raised and lowered by applying a downward or upward force to device main body 2.

[0009] Meanwhile, an upper sprocket 15 is rotatably disposed in the upper part of the support column 8, and a lower sprocket 16 is rotatably disposed in the bottom part of the support column 8, with the upper sprocket 15 and the lower sprocket 16 being connected by a chain 14. A connecting fitting 17 is attached to one point of the chain 14, and this connecting fitting 17 is connected to the movable plate 703. Therefore, by rotating the lower sprocket 16 and moving the chain 14 up and down, the movable plate 703 can be raised or lowered, and thereby the device main body 2 can be raised or lowered. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-124396 Summary of the Invention [Problem to be solved by the invention]

[0011] 11 is a diagram showing a mechanism for rotating the lower sprocket 16, in which the reference numeral 51 denotes a motor. A drive shaft 52 is coaxially connected to the rotating shaft of the motor 51, and a clutch 53 is provided around and fixed to the outer periphery of the drive shaft 52 on the motor 51 side. When the motor 51 is driven, the drive shaft 52 rotates in the same direction as the rotating shaft of the motor 51, and the clutch 53 also rotates in the same direction as the rotating shaft of the motor 51.

[0012] In addition, a torque limiter hub 55 having a flange portion is rotatably mounted on the outer periphery of the drive shaft 52 on the side opposite the motor 51 from the clutch 53, and this torque limiter hub 55 is mounted on the drive shaft 52 in such a manner that the flange portion faces the clutch 53 side.

[0013] Furthermore, an attraction plate 54 is provided between the flange portion of the torque limiter hub 55 and the clutch 53, and the torque limiter hub 55 and the clutch 53 are arranged adjacent to each other via the attraction plate 54, and the attraction plate 54 is fixed to the flange portion. Therefore, by operating the clutch 53, the torque limiter hub 55 and the clutch 53 are connected via the attraction plate 54. Therefore, when the motor 51 is driven to rotate the clutch 53, the torque limiter hub 55 also rotates in the same direction as the rotation shaft of the motor 51 via the attraction plate 54.

[0014] The lower sprocket 16 is rotatably mounted on the outer periphery of the torque limiter hub 55, and torque limiters 58 serving as friction plates are disposed on both ends of the lower sprocket 16 as viewed in the axial direction of the drive shaft 22. Furthermore, the lower sprocket 16 is pressed against the flange portion of the torque limiter hub 55 by a pressing means 60 via the torque limiters 58.

[0015] In this way, the lower sprocket 16 is pressed against the flange portion of the torque limiter hub 55 via the torque limiter 58. Therefore, when the clutch 53 is actuated and the torque limiter hub 55 and the clutch 53 are connected, and the motor 51 is driven, the torque limiter hub 55 rotates via the clutch 53 and the suction plate 54. This causes the torque limiter 58 to rotate due to friction with the torque limiter hub 55, and the lower sprocket 16 also rotates due to the frictional force between the torque limiter 58 and the lower sprocket 16.

[0016] On the other hand, because the lower sprocket 16 is designed to rotate by friction with the torque limiter 58, if an object or person gets caught in the descending device main body 2 while the device main body 2 is moving downward, and strong pressure is applied to the rotation of the lower sprocket 16, causing an overload on the torque limiter 58, the torque limiter 58 will slip against the lower sprocket 16 and spin freely, preventing the lower sprocket 16 from rotating, so it can also function as a safety mechanism.

[0017] However, with this mechanism, if a strong downward pressure is applied to the device main body 2 for some reason when the device main body 2 is being raised electrically by the drive of the motor 51 or when the device main body 2 is stopped, and this downward pressure exceeds the frictional force between the torque limiter 58 and the lower sprocket 16, causing the lower sprocket 16 to slip against the torque limiter 58, there is a possibility that the device main body 2 will descend against the operator's will, leading to an unexpected incident.

[0018] Therefore, the present invention aims to provide an X-ray imaging device in which the device body having an image receiving unit can be moved either electrically or manually, which has a safety mechanism that is the same as conventional devices when the device body is lowered, and which has a strong holding force that prevents the device body from lowering even if strong downward pressure is applied when the device body is being raised electrically or when the device body is stopped. [Means for solving the problem]

[0019] The X-ray imaging apparatus of the present invention comprises: The pillars and a device body that is supported on a support column so as to be movable up and down and that has an image receiving unit that photographs the inside of the subject by visualizing the X-rays that have passed through the subject; a counterbalance mechanism for manually moving the device body up and down; a drive mechanism for electrically moving the device body up and down, The counterbalance mechanism includes: a first rotating body rotatably disposed in an upper portion of the support column; a first transmission means wound around a first rotating body, with one end connected to the device body and the other end connected to a counterweight, and the device body connected to one end of the first transmission means is supported so as to be movable up and down while being balanced with the counterweight; The drive mechanism includes: a driven rotating body rotatably connected to an upper portion of the support column; a driving side rotating body rotatably connected to a lower portion inside the support column; a second transmission means for connecting the driven-side rotating body and the driving-side rotating body, to which the device main body is locked, and which moves up and down in accordance with the rotation of the driven-side rotating body and the driving-side rotating body to raise or lower the device main body; a rotation mechanism for rotating the drive-side rotating body, The rotation mechanism includes: A motor and a drive shaft coaxially connected to the rotation shaft of the motor; a clutch fixed to an end portion of the outer periphery of the drive shaft on the motor side; a torque limiter hub having a cylindrical hub body and a flange portion formed by increasing the outer diameter of one end portion of the hub body, the torque limiter hub being rotatably mounted on the outer periphery of the drive shaft with the flange portion positioned on the clutch side; a one-way clutch that is provided around the hub body of the torque limiter hub and has the drive side rotating body provided around and fixed to the outer periphery thereof, and that is rotatable in one direction relative to the torque limiter hub but is prevented from rotating in the other direction; torque limiters disposed on both ends of the drive-side rotating body as viewed in the axial direction of the drive shaft; a pressing means for pressing the drive side rotating body together with the torque limiter against the flange portion of the torque limiter hub, thereby allowing the drive side rotating body to rotate simultaneously with the torque limiter hub in the same direction as the rotation direction of the torque limiter hub, By operating the clutch, the clutch and the torque limiter hub are connected, and by driving the motor in this state, the rotation of the motor's rotating shaft is transmitted to the driving side rotating body via the clutch, and the device body is electrically raised or lowered. By releasing the clutch and disconnecting the clutch from the torque limiter hub, the device body can be manually raised or lowered. The one-way clutch is arranged around the hub body of the torque limiter hub in such a manner that it allows rotation of the device body relative to the torque limiter hub in the direction in which the device body rises, but prevents rotation of the device body in the direction in which the device body descends. [Effects of the Invention]

[0020] The X-ray imaging device of the present invention is equipped with a counterbalance mechanism that is wound around a first rotating body and has a first transmission means that has the device main body connected to one end and a counterweight connected to the other end, and supports the device main body connected to one end of the first transmission means so that it can move up and down freely while balancing with the counterweight, thereby allowing the device main body to be moved up and down manually, and a drive mechanism that connects the driven side rotating body and the driving side rotating body with a second transmission means, engages the device main body to this second transmission means, and rotates the driving side rotating body with a rotation mechanism, allowing the device main body to be moved up and down electrically, making it possible to switch between electric and manual movement of the device main body depending on the situation at hand, etc.

[0021] The rotation mechanism for rotating the drive side rotating body has a motor as a drive source, a drive shaft connected coaxially to the rotating shaft of the motor, a clutch connected to the outer periphery of the drive shaft to transmit the rotational force of the drive source, and a torque limiter hub rotatably mounted on the outer periphery of the drive shaft and connected to the clutch by operating the clutch to transmit the rotational force of the drive source, and a one-way clutch is attached to the outer periphery of this torque limiter hub so that it can rotate freely in one direction relative to the torque limiter hub but is prevented from rotating in the other direction, and the drive side rotating body is mounted and fixed to the outer periphery of this one-way clutch, and the one-way clutch is mounted on the torque limiter hub in an arrangement that allows it to rotate in the direction that raises the device main body but prevents it from rotating in the direction that lowers the device main body.

[0022] Therefore, when the device main body is being electrically raised by rotating the torque limiter hub and drive side rotating body in the direction in which the device main body rises, or when the device main body is stopped, even if strong downward pressure is applied to the device main body, a one-way clutch is disposed around the torque limiter hub in such a position that the device main body is prevented from rotating in the direction in which it descends.As a result, the one-way clutch acts to prevent the drive side rotating body from rotating in the direction in which the device main body descends, and therefore the device main body can be prevented from descending against the operator's will.

[0023] Furthermore, torque limiters are placed on both ends of the drive side rotating body as viewed in the axial direction of the drive shaft, and the drive side rotating body is pressed against the flange portion of the torque limiter hub together with the torque limiters, causing the drive side rotating body to rotate due to friction with the torque limiters. Therefore, if an object or person becomes caught in the descending device main body 2 while the device main body 2 is moving downward, the torque limiter will slip relative to the drive side rotating body and spin freely, preventing the drive side rotating body from rotating, so that when the device main body is descending, the same safety mechanism as before can be maintained. [Brief explanation of the drawings]

[0024] [Figure 1] 3 is a cross-sectional view for explaining a rotation mechanism in the embodiment of the X-ray imaging apparatus of the present invention. FIG. [Figure 2] 5A to 5C are diagrams for explaining the operation of a rotation mechanism in the X-ray imaging apparatus according to the embodiment of the present invention. [Figure 3] 1 is a perspective view of an embodiment of an X-ray imaging apparatus according to the present invention. [Figure 4] 1 is a top view of an embodiment of an X-ray imaging apparatus according to the present invention. [Figure 5] 1 is a side view of an embodiment of an X-ray imaging apparatus according to the present invention. [Figure 6] FIG. 2 is a diagram for explaining the mechanism in the embodiment of the X-ray imaging apparatus of the present invention, showing the structure inside the support column from the front side. [Figure 7] 6 is a diagram showing a cross-sectional structure along the line BB in FIG. 5. [Figure 8] 1 is a diagram for explaining an image receiving unit in an embodiment of an X-ray imaging apparatus of the present invention. [Figure 9] FIG. 2 is a diagram for explaining a drive mechanism for an image receiving unit in an embodiment of an X-ray imaging apparatus according to the present invention, showing the structure inside a support column from a plan view. [Figure 10] FIG. 6 is a diagram showing a cross-sectional structure taken along the line AA in FIG. 5. [Figure 11]10A and 10B are diagrams illustrating a rotation mechanism in a conventional X-ray imaging apparatus that can be switched between manual and electric modes. DETAILED DESCRIPTION OF THE INVENTION

[0025] The X-ray imaging apparatus of the present invention has a support column and an apparatus main body supported on the support column so as to be movable up and down, and the apparatus main body has an image receiving unit that removably houses a cassette containing an X-ray-sensitive photographic film and a photoreceptor such as an image sensor, and that uses the housed film and image sensor to visualize X-rays that have passed through the subject, thereby photographing the interior of the subject.The X-ray imaging apparatus of the present invention also has a counterbalance mechanism for manually moving the apparatus main body up and down, and a drive mechanism for electrically moving the apparatus main body up and down, making it possible to switch between electrically and manually moving the apparatus main body up and down.

[0026] The counterbalance mechanism for manually moving the device body up and down has a first rotating body rotatably arranged in the upper part of the support column, and a first transmission means is wound around the first rotating body. The device body is connected to one end of the first transmission means, and a counterweight is connected to the other end, and the first transmission means supports the device body connected to one end so that it can move up and down while balancing it with the counterweight connected to the other end.

[0027] The drive mechanism for electrically moving the device body up and down has a driven rotating body rotatably connected to an upper part of the support column, and a driving rotating body rotatably connected to a lower part of the support column. The driven rotating body and the driving rotating body are connected by a second transmission means, and the device body is further engaged with the second transmission means. As the driven rotating body and the driving rotating body rotate, the second transmission means moves up and down to raise or lower the device body.

[0028] Furthermore, the present invention is provided with a rotation mechanism for rotating the drive-side rotating body, and this rotation mechanism has a motor and a drive shaft that is coaxially connected to the rotation shaft of the motor.

[0029] A clutch is fixed to the end of the outer periphery of the drive shaft on the motor side, and when the motor is driven and the drive shaft rotates, the clutch also rotates in the same direction as the drive shaft.It is preferable to use an electromagnetic clutch as the clutch.

[0030] In addition, a torque limiter hub is rotatably mounted on the outer periphery of the drive shaft. This torque limiter hub has a cylindrical hub body and a flange portion formed by increasing the outer diameter of one end portion of the hub body, and is rotatably mounted on the outer periphery of the drive shaft with the flange portion positioned on the clutch side.

[0031] Furthermore, a one-way clutch is mounted around the hub body of the torque limiter hub. This one-way clutch is free to rotate in one direction relative to the torque limiter, but is prevented from rotating in the other direction. The drive-side rotating body is mounted around the outer periphery of this one-way clutch, and the one-way clutch is fixed to the inner periphery of the drive-side rotating body. As a result, the one-way clutch and the drive-side rotating body are integrated and rotate simultaneously in the same direction.

[0032] Furthermore, torque limiters are disposed on both ends of the drive-side rotating body as viewed in the axial direction of the drive shaft, so that the drive-side rotating body is clamped between the torque limiters. The drive-side rotating body, together with the torque limiters, is pressed against the flange portion of the torque limiter hub by a pressing means, so that the drive-side rotating body rotates simultaneously with the torque limiter hub in the same direction as the rotation of the torque limiter hub.

[0033] With this configuration, the clutch is activated to connect the torque limiter hub and the clutch, and by driving the motor in this state, the rotation of the motor's rotating shaft is transmitted to the drive side rotating body via the drive shaft and clutch, thereby electrically raising or lowering the device main body, and by releasing the clutch and releasing the connection between the clutch and the torque limiter hub, the device main body can be raised or lowered manually.

[0034] In addition, the one-way clutch is arranged around the hub body of the torque limiter hub in such a way that it allows rotation of the torque limiter hub in the direction in which the device body rises but prevents rotation in the direction in which the device body falls.This prevents the drive side rotating body from rotating in the direction in which the device body falls when the torque limiter is rotating in the direction in which the device body rises, and makes it possible to prevent the device body from falling against the operator's will when the device body is being raised.

[0035] Here, it is preferable to dispose an attraction plate between the flange portion of the torque limiter hub and the clutch, and to connect the clutch and the torque limiter hub via the attraction plate.

[0036] In addition, the device body is configured to include an image receiving unit that accommodates a cassette that stores photographic film, a photoreceptor such as an image pickup element, and other light receiving elements that can be inserted and removed freely, a control box that accommodates a control unit, and a lift, and one end of the wire is connected to the lift, and the lift is further engaged with the second transmission means. [Example]

[0037] An embodiment of the X-ray imaging apparatus of the present invention will be described with reference to the drawings. FIGS. 3 to 5 are views showing the appearance of the X-ray imaging apparatus of this embodiment, with FIG. 3 being a front perspective view, FIG. 4 being a view from above, and FIG. 5 being a view from the side.

[0038] In the figure, reference numeral 1 denotes the X-ray imaging apparatus of this embodiment, and the X-ray imaging apparatus 1 of this embodiment moves the image receptor up and down using a mechanism similar to that of the X-ray imaging apparatus described above in which the device body having the image receptor can be moved either electrically or manually (hereinafter referred to as the "conventional switchable X-ray imaging apparatus"). That is, like the conventional switchable X-ray imaging apparatus, the X-ray imaging apparatus 1 of this embodiment has a support column 8 and a device body 2 supported on this support column 8 so as to be freely movable in the vertical direction. The X-ray imaging apparatus 1 of this embodiment also has a counterbalance mechanism for manually moving the device body 2 up and down, and a drive mechanism for electrically moving the device body 2 up and down. This makes it possible to move the image receptor up and down either electrically or manually, and to switch between electrically and manually moving the image receptor depending on the situation, etc.

[0039] Now, the device main body will be described. In the figure, reference numeral 2 denotes the device main body, and in this embodiment, device main body 2 has an image receiving unit. That is, in the figure, reference numeral 3 denotes the image receiving unit, and in this embodiment, image receiving unit 3 has a photoreceptor insertion opening 301 on the side, through which a photoreceptor such as an image pickup element or a cassette containing a radiographic film that is exposed to X-rays can be inserted and removed. In addition, grips 302 are attached to both sides of the back surface to be held safely by a patient or other subject during radiography.

[0040] A control box 4 is attached to the rear side of the image receiving unit 3, and the control box 4 houses a control board equipped with a microcomputer that controls the operation of the device.

[0041] In the figure, reference numeral 5 denotes a handle for supporting the device main body 2 when manually raising or lowering the device main body 2. Also in Fig. 5, reference numeral 6 denotes a group of switches. In this embodiment, the group of switches 6 includes a brake release switch 6a for releasing the brake when manually raising or lowering the device main body 2, an elevation switch 6b for electrically raising the device main body 2, and a lowering switch 6c for electrically lowering the device main body 2.

[0042] Next, Fig. 8 is a diagram showing the outline of the device main body 2 from above, in which reference numeral 7 denotes a lift. That is, in this embodiment, the device main body 2 has a lift 7 for supporting the device main body 2 on the support column 8. The lift 7 includes a mounting plate 701 attached to the rear side of the control box 4, a movable plate 703 placed inside the support column 8, and a connecting portion 702 connecting the mounting plate 701 and the movable plate 703.

[0043] On the other hand, the support 8 is configured by covering the front of a vertically long box-shaped body with a cover, and two guides 801 are formed on the front side in the vertical direction. The connecting part 702 passes through the two guides 801 formed on the front side of the support 8 in the vertical direction, and as a result, the image receiving unit 3 and the control box 4 are configured to be exposed on the front side of the cover that covers the body surface of the support 8.

[0044] Next, the counterbalance mechanism for manually moving the device main body 2 up and down will be described with reference to the drawings. Figures 6, 7, 9, and 10 are diagrams for explaining the internal structure of the support pillar, with Figure 6 showing the inside of support pillar 8 from the front side, Figure 7 showing the cross-sectional structure along line BB in Figure 6, Figure 9 showing the internal structure of the support pillar from the top side, and Figure 10 showing the cross-sectional structure along line AA in Figure 6.

[0045] In the figure, 802 is the body of the support 8, and in this embodiment, the body 802 is a vertically long box with an opening on the front side. As described above, the front side is covered with a cover, and the inside is divided into the front side and the back side by a partition wall 803.

[0046] The height of the partition wall 803 is shorter than the height of the interior of the body 802, thereby forming a gap 804 between the upper end of the partition wall 803 and the ceiling portion of the body 803.

[0047] A main shaft 9 is attached to the upper part of the partition wall 803 in a manner that connects the left and right side walls of the main body 803, and pulleys 10 as first rotating bodies are attached to each end of this main shaft 9 in a freely rotatable manner.

[0048] Further, a wire 11 serving as a first transmission means is wound around each of the pulleys 10, one end of the wire 11 being connected to a movable plate 703 constituting the lift 7 in the device body 2, and the other end of the wire 11 being connected to a counterweight 12 disposed within the body 8028 on the rear side of the partition wall 803. As a result, the device body 2 is supported by the wire 11 via the lift 7 so as to be able to move up and down freely.

[0049] That is, in this embodiment, a counterbalance mechanism is formed by the main shaft 9, the pulley 10 rotatably attached to the main shaft 9, the wire 11 wound around the pulley 10, the device body 2 connected to one end of the wire 11 via the movable plate 703, and the counterweight 12 connected to the other end of the wire, and this counterbalance mechanism allows the device body 2 connected to one end of the wire 11 to be manually moved up and down while balancing with the counterweight 12. Therefore, by applying a downward force to the device body 2 with the handle 5, the device body can be lowered, and by applying an upward force to the device body 2, the device body can be raised.

[0050] In the figure, reference numeral 13 denotes a brake. That is, in this embodiment, the electromagnetic brake 13 is attached to one side of the pulley 10. In this embodiment, the brake 13 is normally kept activated and is deactivated by pressing the brake release switch 6a. Therefore, when raising or lowering the device main body 2, a downward or upward force is applied to the device main body 2 using the handle 5 while pressing the brake release switch 6a.

[0051] 10, reference numeral 19 denotes a bearing. That is, in this embodiment, a square-shaped guide portion 805 is provided in the center of the front side of the partition wall 803 so as to protrude in the vertical direction, and bearings 19 are attached to the movable plate 703 facing the partition wall 803 side so as to sandwich both sides of this guide portion 805.

[0052] Furthermore, the partition wall 803 has left and right sides bent rearward to form side walls, and angular guide portions 805 are also provided protruding from each of these side walls in the vertical direction, while the movable plate 703 also has left and right sides bent rearward and a bearing 19 is attached to the movable plate 703 facing the partition wall 803 so as to abut against the guide portions 805. This allows the movable plate 703 to move smoothly up and down.

[0053] In the above description, the wire 11 is used as the first transmission means, but it is not necessary to use a wire as the first transmission means, and other means such as a belt or chain may also be used. Furthermore, when a chain is used as the first transmission means, a sprocket may also be used as the first rotating body.

[0054] Next, the drive mechanism for electrically moving the device main body 2 up and down will be described. The drive mechanism in this embodiment is configured to include an upper sprocket 15 as a driven rotating body that is rotatably connected to the upper part of the support 8, a lower sprocket 16 as a driving rotating body that is rotatably connected to the lower part of the support 8, a chain 14 as a second transmission means that connects the upper sprocket 15 and the lower sprocket 16, and a rotating mechanism for rotating the lower sprocket 16. The device main body 2 is engaged with the chain 14 via the lift 7, so that by rotating the lower sprocket 16, the device main body 2 can be electrically moved up and down.

[0055] That is, in the X-ray imaging apparatus 1 of this embodiment, an upper sprocket 15 serving as a driven-side rotating body is rotatably disposed on the upper part of the partition wall 803, and a lower sprocket 16 serving as a driving-side rotating body is rotatably disposed at the bottom of the body 802. The upper sprocket 15 and the lower sprocket 16 are connected by an endless chain 14, and by rotating the upper sprocket 15 and the lower sprocket 16, the chain 14 is movable in the vertical direction. A connecting metal fitting 17 is attached to one point of the chain 14, and this connecting metal fitting 17 is connected to a movable plate 703 constituting the lift 7, whereby the apparatus main body 2 is engaged with the chain 14 via the lift 7.

[0056] For this reason, in this embodiment, the chain 14 is moved in the vertical direction by rotating the lower sprocket 16 using a rotating mechanism, thereby raising or lowering the movable plate 703. In other words, by moving the chain 14, the device main body 2 can be raised or lowered.

[0057] Next, the rotation mechanism for rotating the lower sprocket 16 as the drive-side rotating body will be described with reference to Figure 1. Figure 1 is a partial cross-sectional view for explaining the configuration of the rotation mechanism, showing the rotation mechanism as viewed from the side of the device. In the figure, reference numeral 16 denotes the lower sprocket, and reference numeral 21 denotes a motor as a drive source for rotating the lower sprocket 16.

[0058] That is, in this embodiment, the rotation mechanism has a motor 21 as a drive source, and a drive shaft 22 is connected to the tip of the rotation shaft of this motor 21, coaxially with the rotation shaft, so that when the motor 21 is driven, the drive shaft 22 rotates in the same direction as the rotation shaft of the motor 21.

[0059] Next, a clutch 23 is mounted and fixed around the outer periphery of the end portion of the drive shaft 22 on the motor 21 side, so that when the motor 21 is driven, the clutch 23 rotates in the same direction as the rotation of the drive shaft 22 along with the rotation of the rotating shaft of the motor 21 and the drive shaft 22.

[0060] Clutch 23 has clutch body 2301 and magnet 2302, and is an electromagnetic clutch in which clutch body 2301 is actuated by the magnetic force of magnet 2302 when a switch is turned on. Note that electromagnetic clutches are well known, so a detailed description thereof will be omitted.

[0061] Next, a torque limiter hub 25 is mounted on the outer periphery of the drive shaft 22, and this torque limiter hub 25 is rotatable relative to the drive shaft 22. The torque limiter hub 25 has a cylindrical hub body 26 and a flange portion 27 formed at an end portion of the hub body 26 with an outer diameter larger than that of the hub body 26, and the torque limiter hub 25 is mounted on the outer periphery of the drive shaft 22 with the flange portion 27 facing the clutch 23 side.

[0062] In addition, an attraction plate 24 is fixed to the surface of the flange portion 27 facing the clutch 23, so that when the clutch 23 is operated, the clutch 23 and the attraction plate 24 are connected, and further, the torque limiter hub 25 is connected to the clutch 23 via the attraction plate 24, so that the torque limiter hub 25 and the clutch 23 become one unit. Therefore, when the motor 21 is driven with the clutch 23 in an activated state, the torque limiter hub 25 rotates in the same direction as the rotation direction of the rotary shaft of the motor 21.

[0063] Next, the lower sprocket 16 for electrically moving the device main body 2 up and down is rotatably mounted on the outer periphery of the hub body 26, and a one-way clutch 29 is attached to the inner periphery of the lower sprocket 16, and this one-way clutch 29 is fixed to the lower sprocket 16. In other words, the lower sprocket 16, with the one-way clutch 29 fixed to its inner periphery, is rotatably mounted on the outer periphery of the hub body 26.

[0064] Now, to explain the one-way clutch, as is well known, a one-way clutch is a clutch that transmits rotational force in only one direction between coaxial inner and outer rings. In this embodiment, one-way clutch 29 is attached to the inner periphery of lower sprocket 16, and in this state lower sprocket 16 is rotatably mounted on hub body 26, so lower sprocket 16 can rotate in only one direction relative to hub body 26.

[0065] In this embodiment, a one-way clutch 29 is attached to the inner circumference of the lower sprocket 16 in an arrangement that allows the hub body 26 to rotate in the same direction as the rotation of the lower sprocket 16 when raising the device body 2, but prevents rotation in the same direction as the rotation of the lower sprocket 16 when lowering the device body 2, thereby making it possible to effectively prevent the device body 2 from descending even if strong downward pressure is applied to the device body 2 when it is being raised electrically or when it is stopped.

[0066] This relationship will be explained with reference to Figure 2, which is a cross-sectional view showing the relationship between the drive shaft 22, the hub body 26 of the torque limiter hub 25, the one-way clutch 29, and the lower sprocket 16, and is a view showing the CC end face in Figure 1.

[0067] The arrow indicated by t1 in the figure indicates the rotation direction of the lower sprocket 16, with t1a indicating the rotation direction of the lower sprocket 16 when raising the device body 2 and t1b indicating the rotation direction of the lower sprocket 16 when lowering the device body 2. Therefore, when raising the device body 2, the lower sprocket 16 is rotated in the direction t1a, and when lowering the device body 2, the lower sprocket 16 is rotated in the direction t1b. That is, in Figure 2, when the lower sprocket 16 is rotating clockwise, the device body 2 is raised, and when the lower sprocket 16 is rotating counterclockwise, the device body 2 is lowered.

[0068] On the other hand, the arrow indicated by t2 indicates the rotation direction of the one-way clutch 29 relative to the hub body 26, with t2a indicating the rotation direction of the one-way clutch 29 when the device body 2 is ascending and t2b indicating the rotation direction of the one-way clutch 29 when the device body 2 is descending. In this embodiment, when the torque limiter hub 25 is not rotating or when the torque limiter hub 25 is rotating in the direction t1a, the one-way clutch 29 is allowed to rotate in the direction t2a, which is the rotation direction when the device body 2 is ascending, but is prevented from rotating in the direction t2b, which is the rotation direction when the device body 2 is descending.

[0069] Therefore, when the device main body 2 is being raised, that is, when the drive shaft 22 is rotated in the direction t1a and the clutch 23, suction plate 24 and torque limiter hub 25 are rotating in the direction t1a accordingly, the one-way clutch 29 is prevented from rotating in the direction t2b, which is the rotation direction when the device main body 2 is being lowered, and therefore, together with the rotation of the torque limiter hub 25, the lower sprocket 16 also rotates in the upward direction, that is, in the direction t1a.

[0070] At this time, even if a strong downward pressure is applied to the device body 2 and a pressure is applied to the lower sprocket 16 in the rotational direction (t1b direction) for lowering the device body 2, when the torque limiter hub 25 is not rotating or when the torque limiter hub 25 is rotating in the t1a direction, the one-way clutch 29 is prevented from rotating in the t2b direction, which is the rotational direction when the device body 2 is lowering. Therefore, the lower sprocket 16, which has the one-way clutch 29 on its inner periphery, does not rotate in the rotational direction (t1a) for lowering the device body 2, thereby effectively preventing the device body 2 from lowering. Therefore, with the X-ray imaging device 1 of this embodiment, it is possible to reliably prevent the device body 2 from lowering even if a strong downward pressure is applied when the device body 2 is being electrically raised or when the device body 2 is stopped.

[0071] 1, friction plates 28 serving as torque limiters are disposed on both ends of the lower sprocket 16 as viewed in the axial direction of the drive shaft 22. The lower sprocket 16, sandwiched between the friction plates 28, is pressed against the flange portion 27 of the torque limiter hub 25 by a pressing means, and the lower sprocket 16 is thereby integrated with the torque limiter hub 25 by the friction force of the friction plates 28. Therefore, when the motor 21 is driven with the clutch 23 activated, thereby rotating the torque limiter hub 25 in the same direction as the rotational direction of the rotary shaft of the motor 21, the lower sprocket 16 also rotates in the same direction as the rotation of the torque limiter hub 25. This allows the device main body 2 to be electrically driven to move up and down.

[0072] The pressing means 30 is composed of a spring 31 that abuts against the friction plate 28 and presses the friction plate, and a pressing plate 32 that presses the spring 31 toward the friction plate 28. The pressing plate 32 is screwed into the hub body 26, and the strength of the pressure can be freely adjusted by adjusting the degree of screwing.

[0073] Next, the operation of the rotation mechanism configured in this manner will be explained. When the clutch 23 is operated, the clutch 23 and torque limiter hub 25 are connected via the attraction plate 24. When the motor 21 is driven in this state, the drive shaft 22 rotates together with the rotating shaft of the motor 21, causing the clutch 23 to rotate in the same direction as the drive shaft 22, and the torque limiter hub 25, which is integrated with the clutch 23, to also rotate in the same direction as the drive shaft 22.

[0074] Therefore, when the drive shaft 22 is rotated in the direction t1a, which is the direction in which the device main body 2 is raised, with the clutch 23 activated, the one-way clutch 29 is prevented from rotating in the direction t2b, which is the rotation direction when the device main body 2 is descending.Therefore, when the torque limiter hub 25 rotates in the direction t1a, the lower sprocket 16 rotates in the upward direction, i.e., in the direction t1a, due to the action of the one-way clutch 29, regardless of the frictional force caused by the friction plate 28, and thereby the device main body 2 can be raised.

[0075] At this time, a one-way clutch 29 is attached to the inner circumference of the lower sprocket 16, and the one-way clutch 29 is attached to the inner circumference of the lower sprocket 16 in an arrangement such that it rotates relative to the hub body 26 in the same direction as the rotation of the lower sprocket 16 when the device body 2 is raised, but is prevented from rotating in the same direction as the rotation of the lower sprocket 16 when the device body 2 is lowered.Therefore, even if strong downward pressure is applied to the device body 2, the torque limiter hub 25 rotates in the direction t1a, so the one-way clutch 29 is prevented from rotating in the direction t2b, and therefore the device body 2 can be effectively prevented from descending.

[0076] As mentioned above, the lower sprocket 16 is integrated with the torque limiter hub 25 by the frictional force of the friction plate 28, and when the torque limiter hub 25 rotates, the lower sprocket 16 also rotates in the same direction as the rotation of the torque limiter hub 25. However, when the drive shaft 22 is rotated in a direction that raises the device main body 2, the device main body 2 is raised by the action of the one-way clutch 29, regardless of the frictional force of the friction plate 28a.

[0077] On the other hand, when the clutch 23 is activated and the drive shaft 22 is rotated in the direction t1b, which is the direction in which the device main body 2 is lowered, and the torque limiter hub 25 is also rotated in the direction t1b, which is the direction in which the device main body 2 is lowered, the one-way clutch 29 is allowed to rotate in the direction t2a, which is the rotation direction when the device main body 2 is rising, so the hub body 26 spins freely relative to the one-way clutch 29, and it becomes impossible to rotate the lower sprocket 16 in the direction t1b, which is the direction in which the device main body 2 is lowered.

[0078] However, as described above, in this embodiment, friction plates 28 are disposed as torque limiters on both ends of the lower sprocket 16 as viewed in the axial direction of the drive shaft 22, and the lower sprocket 16, sandwiched between the friction plates 28, is pressed toward the flange portion 27 of the torque limiter hub 25 by a pressing means, and the lower sprocket 16 is integrated with the torque limiter hub 25 by the friction force of the friction plates 28. Therefore, even when the torque limiter hub 25 rotates in the direction t1b, which is the direction in which the device main body 2 is lowered, the one-way clutch 29 does not spin freely relative to the torque limiter hub 25, and the lower sprocket 16 rotates in the same direction as the rotation of the torque limiter hub 25. This allows the device main body 2 to be lowered electrically.

[0079] If something happens that prevents the device body 2 from descending, such as something getting caught under the device body 2, and strong pressure is applied to the lower sprocket 16, causing an overload on the friction plate 28, the torque limiter hub 25 will spin freely and slip relative to the lower sprocket 16, preventing the lower sprocket 16 from rotating and stopping the device body 2. In this case, the one-way clutch 29 will allow the torque limiter hub 25 to rotate in the direction t2a, which is the rotation direction when the device body 2 is ascending, and will not force the lower sprocket 16 to descend. Therefore, when the device body 2 is descending, the same safety mechanism as before can be maintained.

[0080] Next, the control system of this embodiment will be described. The X-ray imaging apparatus 1 of this embodiment has a control unit for controlling the operation of the entire apparatus, and in this embodiment, this control unit is a microcomputer equipped with an inverter function. This microcomputer is connected to an electromagnetic brake 13 for stopping the rotation of the pulley 10, a clutch 23 and motor 21 for driving the lower sprocket 16, a brake release switch 6a for releasing the operation of the electromagnetic brake 13, an up switch 6b and a down switch 6c for driving the motor 19 to rotate the lower sprocket 16 and move the chain 14, thereby raising or lowering the apparatus body, a power supply, etc.

[0081] As mentioned above, under normal circumstances when no switches are pressed, the microcomputer activates the electromagnetic brake 13 to prevent the rotation of the pulley 10, and by disconnecting the clutch 23 from the torque limiter hub 25, it blocks the transmission of the rotational force of the motor 21 to the lower sprocket 16, thereby freeing the chain 14.

[0082] When the up switch 6b or the down switch 6c is pressed, the electromagnetic brake 13 is released to allow the pulley 10 to rotate freely while the switch remains pressed, and the clutch 23 and the torque limiter hub 25 are connected to enable the rotation of the motor 21 to be transmitted to the lower sprocket 16 via the clutch 23, causing the motor 21 to rotate forward or backward. This causes the lower sprocket 16 to rotate, moving the chain 14, and the device main body 2 connected to the chain 14 can be raised or lowered.

[0083] On the other hand, when the brake release switch 6a is pressed, the microcomputer releases the connection between the clutch 23 and the torque limiter hub 25 while the switch remains pressed, and releases the operation of the electromagnetic brake 13, allowing the pulley 10 to freely rotate. Therefore, in this state, by gripping the handle 5 and applying a downward or upward force to the device main body 2, the device main body can be lowered or raised.

[0084] Therefore, in the X-ray imaging apparatus 1 of this embodiment, the operator can switch between electrically and manually raising or lowering the apparatus main body at his / her own will depending on the situation at hand.

[0085] Next, the overall operation of the X-ray imaging device 1 of this embodiment configured as described above will be explained. First, when manually raising or lowering the device body, the brake release switch 6a is pressed to release the operation of the electromagnetic brake 13 and allow the pulley 10 to rotate freely.

[0086] Therefore, when the operator presses the brake release switch 6a and grips the grip 5 to apply a downward or upward force to the device main body 2, the device main body will rise or fall, and when the force applied to the device main body 2 is released, the device main body 2 will stop rising or falling, and when the brake release switch 6a is released from being pressed, the electromagnetic brake 13 will be activated to prevent the pulley 10 from rotating and the device main body will stop.

[0087] On the other hand, when the device body is raised or lowered electrically, in this embodiment, one-way clutch 29 is attached in advance to the inner periphery of lower sprocket 16 so that when torque limiter hub 25 is not rotating, rotation is permitted in direction t2a, which is the rotation direction when device body 2 is rising, relative to hub body 26, but rotation is prevented in direction t2b, which is the rotation direction when device body 2 is lowering. When the device body is to be raised or lowered electrically, raise switch 6b or lower switch 6c is pressed, and then the microcomputer activates clutch 23 to connect clutch 23 to torque limiter hub 25.

[0088] When the drive shaft 23 is rotating in the direction that raises the device body 2, as described above, the action of the one-way clutch 29 causes the lower sprocket 16 to rotate and raise the device body 2, regardless of the frictional force between the lower sprocket 16 and the torque limiter hub 25 caused by the friction plate 28. Furthermore, even if a strong downward pressure is applied to the device body 2 while it is being raised or is stopped, it is possible to effectively prevent the device body 2 from descending.

[0089] In contrast, when the drive shaft 23 is rotated in the direction that lowers the device main body 2, thereby rotating the torque limiter hub 25 in the direction t1b, which is the direction that lowers the device main body 2, the one-way clutch 29 would normally spin freely relative to the hub body 26, but because the lower sprocket 16 is integrated with the torque limiter hub 25 by the frictional force of the friction plate 28, the lower sprocket 16 also rotates in the same direction as the rotation of the torque limiter hub 25, and as a result, the device main body 2 can be lowered electrically.

[0090] If an event occurs that prevents the descent of the device body 2, such as something getting caught under the device body 2, causing strong pressure on the lower sprocket 16 and an overload on the friction plate 28, the torque limiter hub 25 will spin freely and slip relative to the lower sprocket 16, preventing the lower sprocket 16 from rotating and halting the descent of the device body 2. This state will continue until the overload is removed. In this case, the one-way clutch 29 will allow the torque limiter hub 25 to rotate in the direction t2a, which is the rotation direction when the device body 2 is ascending, and will not forcibly descend the lower sprocket 16. Therefore, when the device body 2 is descending, the same safety mechanism as before can be maintained.

[0091] When the up switch 6b or the down switch 6c is released while the device main body 2 is rising or falling, the microcomputer stops driving the motor 21, and the device main body 2 stops.

[0092] In addition, when the up switch 6b or the down switch 6c is released from being pressed, the microcomputer further activates the electromagnetic brake 13 to prevent the rotation of the pulley 10, and also releases the connection between the clutch 23 and the torque limiter hub 25 to block the transmission of the rotational force of the motor 21 to the lower sprocket 16.

[0093] In this way, in the X-ray imaging device of this embodiment, the counterbalance mechanism allows the device body 2 to be moved up and down manually, and the drive mechanism also allows the device body 2 to be moved up and down electrically, so that the up and down movement of the device body can be switched between electrically and manually depending on the situation, etc.

[0094] Furthermore, a one-way clutch 29 is attached to the inner circumference of the lower sprocket 16, and the one-way clutch 29 is arranged around the torque limiter hub in such a way that it allows the device body to rotate in the direction that raises the device body, but prevents it from rotating in the direction that lowers the device body. Therefore, even if a strong downward pressure is applied when the device body is being electrically raised or when the device body is stopped, it is possible to prevent the device body from descending against the operator's will.

[0095] Furthermore, torque limiters are placed on both ends of the lower sprocket as viewed in the axial direction of the drive shaft, and the lower sprocket, together with the torque limiter, is pressed against the flange portion of the torque limiter hub, causing the lower sprocket to rotate due to friction with the torque limiter.As a result, if an object or person becomes caught in the descending device main body while the device main body is moving downward, the torque limiter will slip against the lower sprocket and spin freely, preventing the lower sprocket from rotating.As a result, when the device main body is descending, the device can have the same safety mechanism as before.

[0096] In the above explanation, the lift 7 is attached to the control box 4, and the lift 7 is composed of a mounting plate 701 attached to the back side of the control box 4, a movable plate 703 placed inside the support 8, and a connecting part 702 connecting the mounting plate 701 and the movable plate 703, and the device main body 2 is moved up and down by supporting the movable plate 703 inside the support 8, but this configuration is not necessarily required, and any method is acceptable as long as the device main body 2 is supported on the support 8 and is capable of moving up and down freely.

[0097] Furthermore, in the above explanation, the upper sprocket 15 is used as the driven rotating body, the lower sprocket 16 is used as the driving rotating body, and the upper sprocket 15 and the lower sprocket 16 are connected by the endless chain 14, but it is not necessary to use a chain as the transmission means and a sprocket as the rotating body. Therefore, any long object such as a belt or wire can be used as the transmission means, and a pulley can also be used as the rotating body.

[0098] Furthermore, in the above explanation, wire 11 is used as the first transmission means constituting the counterbalance mechanism, and a pulley is used as the first rotating body. However, it is not necessary to use wire 11 as the first transmission means and a pulley as the first rotating body; a belt, chain, etc. may be used as the first transmission means, and if a chain is used as the first transmission means, a sprocket may be used as the first rotating body. [Industrial Applicability]

[0099] The present invention is an upright X-ray imaging device that allows the device body to be switched between manual and electrically driven up and down movement depending on the situation at hand. When the device body is lowered, it has the same safety mechanism as conventional devices, and when the device body is being raised electrically or when the device body is stopped, it is possible to prevent the device body from lowering against the operator's will even if strong downward pressure is applied. Therefore, the present invention is applicable to all X-ray imaging devices that allow the device body to be electrically driven up and down. [Explanation of symbols]

[0100] 1 X-ray equipment 2. Device body 3. Image receiving unit 301 Photoreceptor insertion port 302 Grip 4 Control Box 5 Handle 6 Switch 6a Brake release switch 6b Up switch 6c Down switch 7. Lift 701 Mounting plate 702 Connection part 703 Movable plate 8 pillars 801 Guide 802 Support structure 803 Bulkhead 804 Gap at the top of the bulkhead 805 Guide part 9 Main axis 10 pulleys 11 Wire 12 Counterweight 13. Brakes 14 Chain 15 upper sprocket 16 Lower sprocket 17 Connecting fittings 18 Connecting fittings 19 Bearings 21 Motor 22 Drive shaft 23 Clutch 2301 Clutch body 2302 Magnet 24 Adsorption plate 25 Torque limiter hub 26 Hub body 27 Flange 28 Torque limiter 29 One-way clutch 30 Pressing means 31 Spring 32 Pressure plate

Claims

1. A support (8); an apparatus body (2) supported by the support (8) so as to be movable up and down and including an image receiving unit (3) for imaging the interior of the subject by visualizing X-rays transmitted through the subject; a counterbalance mechanism for manually moving the device body (2) up and down; A drive mechanism for electrically moving the device body (2) up and down, The counterbalance mechanism includes: a first rotating body (10) rotatably disposed in an upper portion of the support column (8); and a first transmission means (11) wound around a first rotating body (10), with one end connected to the device body (2) and the other end connected to a counterweight (12), and the device body (2) connected to one end of the first transmission means (11) is supported so as to be movable up and down while being balanced with the counterweight (12), The drive mechanism includes: a driven rotating body (15) rotatably connected to an upper portion of the support (8); a driving side rotating body (16) rotatably connected to a lower portion of the support (8); a second transmission means (14) that connects the driven-side rotating body (15) and the driving-side rotating body (16), and that engages the device main body (2) and moves up and down in accordance with the rotation of the driven-side rotating body (15) and the driving-side rotating body (16), thereby raising or lowering the device main body (2); a rotation mechanism for rotating the drive-side rotating body (16), The rotation mechanism includes: A motor (21); a drive shaft (22) coaxially connected to the rotation shaft of the motor (21); a clutch (23) fixed to the outer periphery of the drive shaft (22) at the end portion on the motor (21) side; a torque limiter hub (25) having a cylindrical hub body (26) and a flange portion (27) formed by increasing the outer diameter of one end portion of the hub body (26), the flange portion (27) being positioned on the clutch (23) side and rotatably mounted on the outer periphery of the drive shaft (22); a one-way clutch (29) that is provided around the hub body (26) of the torque limiter hub (25) and has the drive-side rotating body (16) provided around and fixed to its outer periphery, and that is rotatable in one direction relative to the torque limiter hub (25) but is prevented from rotating in the other direction; torque limiters (28) disposed on both ends of the drive-side rotating body (16) as viewed in the axial direction of the drive shaft (22); and a pressing means (30) that presses the drive-side rotating body (16) together with the torque limiter (28) toward the flange portion (27) of the torque limiter hub (25), thereby enabling the drive-side rotating body (16) to rotate simultaneously with the torque limiter hub (25) in the same direction as the rotation direction of the torque limiter hub (25), By operating the clutch (23), the torque limiter hub (25) and the clutch (23) are connected, and in this state, the motor (21) is driven, and the rotation of the rotation shaft of the motor (21) is transmitted to the drive-side rotating body (16) via the clutch (23), thereby electrically raising or lowering the device main body (2); By releasing the operation of the clutch (23) and disconnecting the clutch (23) from the torque limiter hub (25), the device body (2) can be manually raised or lowered; The X-ray imaging device is characterized in that the one-way clutch (29) is disposed around the hub body (26) of the torque limiter hub (25) in such a position that the one-way clutch (29) is permitted to rotate relative to the torque limiter hub (25) in the direction in which the device body (2) rises, but is prevented from rotating in the direction in which the device body (2) descends.

2. 2. The X-ray imaging device according to claim 1, wherein an attraction plate (24) is arranged on the clutch (23) side of the flange portion (26) of the torque limiter hub (25), and the clutch and the torque limiter hub (25) are connected via the attraction plate (24).

3. 3. The X-ray imaging apparatus according to claim 1, wherein the clutch (23) is an electromagnetic clutch.

4. The X-ray imaging device according to claim 1 or 2, characterized in that the device main body (2) comprises an image receiving unit (3) that accommodates a cassette for storing photographic film and a photoreceptor such as an image sensor in a freely insertable and removable manner, a control box (4) that accommodates the control unit (21), and a lift (7), and the lift (7) is connected to one end of the wire (11) and is engaged with the second transmission means (14).

5. The X-ray imaging device of claim 3, characterized in that the device main body (2) comprises an image receiving unit (3) that accommodates a cassette for storing photographic film and a photoreceptor such as an image sensor in a freely insertable and removable manner, a control box (4) that accommodates the control unit (21), and a lift (7), and the lift (7) is connected to one end of the wire (11) and is engaged with the second transmission means (14).

Images