JPH0560090B2 - - Google Patents

Description

Detailed Description of the Invention (Technical Field) The present invention relates to a radiation therapy system in which an unexposed sheet-like recording medium, such as an X-ray photographic film or a stimulable phosphor sheet, is irradiated with radiation at a variable imaging position. Regarding the image shooting stand.

(Prior Art) In the simplest conventional standing radiographic imaging table, an operator places the sheet-like recording medium on an imaging table unit that is movable in the vertical direction and can be positioned at a desired height. After setting a holder for a cassette or magazine, etc., set the photographing unit at the desired height position and take a photograph.After photographing, remove the holder from the photographing table and place the photographed recording medium in the holder. Instead, an unexposed sheet-like recording medium is loaded again and the next photographing is performed. Such a photographing table is not suitable for continuous photographing because it is necessary to take the recording medium into and out of the photographing table unit.

As a radiographic imaging platform suitable for continuous imaging, a transport path is provided with a pair of fixed transport means fixedly arranged at a distance from each other, and a movable imaging stand unit is provided between the pair of fixed transport means. The unexposed recording medium is conveyed to the photographing stand unit via one of the pair of fixed conveying means, and the exposed recording medium photographed by the photographing stand unit is conveyed to the pair of fixed conveying means. It is conceivable to discharge the liquid to the other of the fixed conveyance means. In this case, as the fixed conveyance means, for example, conveyance means each having a pair of conveyance rollers are used, and the recording medium sent from one of the fixed conveyance means is surely placed at the entrance of the photographing stand unit for the photographing. A first transport means is provided with a pair of rollers for taking the medium into the stand unit, and a pair of rollers is provided at the exit of the photographing stand unit for discharging the exposed recording medium to the other fixed transport means. A second transport means is provided.

According to the continuous radiographic imaging table described above,
automatically conveying the recording medium to the photographing platform unit movable between the pair of fixed conveyance means through a pair of rollers of the one fixed conveyance means;
Further, the photographed recording medium can be automatically discharged from the photographing table unit to the other fixed conveyance means, thereby making it possible to automate continuous photographing.

However, during the conveyance of the recording medium from the one fixed conveyance means to the photographing table unit and from the photographing table unit to the other fixed conveyance means, the recording medium is transported between the pair of rollers of the fixed conveyance means and the photographing table unit. When the photographing table unit is moved while being held simultaneously by a pair of rollers of the first conveying means or the second conveying means of the photographing table unit, even if the rollers of the fixed conveying means and the pair of rollers of the fixed conveying means Even if the rollers of the photographing table unit are rotated at the same rotational speed, the movement of the photographing table unit will cause the speed at which the recording medium is transported by the rollers of the fixed transport means and the photographing table to change as seen from a stationary system. There is a difference between the speed at which the recording medium is transported by the rollers of the unit, and as a result, a tension or compressive force is applied to the recording medium in a direction parallel to the conveyance direction, and the recording medium is damaged. Sometimes.

(Objective) Therefore, it is an object of the present invention to provide a radiographic imaging platform in which the imaging platform unit can be moved without damaging the sheet-shaped recording medium even while the recording medium is being conveyed.

(Structure and Effects) The present invention includes a pair of fixed conveyance means that are fixedly arranged at intervals, and a reciprocating movement is possible between the pair of fixed conveyance means. a photographing platform unit provided with a conveying means for receiving a sheet-shaped recording medium sent by one fixed conveying means of the means and discharging it to the other fixed conveying means; the pair of fixed conveying means; a driving means for driving each of the conveying means, each of the pair of fixed conveying means and the conveying means having at least one pair of rollers, and at least one of the pair of rollers has a drive means for driving each of the conveying means; An engaging portion for transmitting a driving force from the driving means for conveying the sheet-like recording medium between the rollers by cooperation of the rollers is provided so as to be engageable with the driving means, and the engaging portion is engageable with the driving means. The drive means includes at least one endless drive transmission member stretched across each of the engagement parts provided on the pair of fixed conveyance means and the rollers constituting the conveyance means, and is characterized in that each of the engaging portions has an outer diameter approximately equal to the outer diameter of each of the rollers on which the engaging portion is provided.

In the photographing platform according to the present invention, for example, when the recording medium is transferred from the one fixed conveying means to the first conveying means provided at the entrance of the photographing table unit, the recording medium is Even if the photographing platform unit is moved while being transferred while being simultaneously held by the rollers of one fixed conveying means and the first conveying means, the one fixed conveying means seen from the stop diameter The speed at which the recording medium is transported by each roller of the first transport means is equal to each other.

Therefore, according to the present invention, even if the photographing table unit is moved for position adjustment while the recording medium is being conveyed, the recording medium is not subjected to the tensile force due to the movement of the photographing table unit. Even when the recording medium is being transported between the pair of fixed transport means, the recording medium can be photographed without being damaged, since the recording medium is not subjected to any bending. The position of the base unit can be adjusted.

In the present invention, as the endless drive transmission member, a power transmission member such as a chain or a timing belt can be used, for example. In addition, the drive transmission member engages with the engagement portion provided on the roller to transmit the driving force. For example, if the drive transmission member is a chain, the chain sprocket,
In the case of a timing belt, a timing gear is used.

Furthermore, in the present invention, the outer diameter of the engaging portion specifically means the pitch circle diameter.

(Embodiments) The features of the present invention will become clearer from the following description of the illustrated embodiments.

As shown in FIG. 1, the photographing stand 10 according to the present invention includes a housing 12 that is L-shaped as a whole and has a horizontal bottom portion 12a and an upright portion 12b vertically rising from one side of the horizontal bottom portion. The upright portion 12b includes a photographing stand unit 16 disposed movably in the vertical direction within an elongated opening 14 extending in the vertical direction provided on the front surface of the upright portion 12b. The length of the opening 14 is large enough to allow the imaging platform unit 16 to move vertically with a stroke that exceeds the length of a sheet-like recording medium (not shown). In order to close the upper and lower portions of the photographing table unit 16 in the opening 14, the free ends of self-rolling blinds 18a and 18b arranged above and below the photographing table unit 16 close the upper end of the photographing table unit 16. and the lower end, respectively.

A holder 20 for accommodating the recording medium to be sent to the photographing stand unit 16 is disposed within the photographing stand unit 16. In the illustrated example, the holder 20 is a first plate member made of a material such as a synthetic resin with a low X-ray absorption rate and whose upper end is swingably supported on the photographing table unit main body 16a via a pivot shaft 22. 24, and the photographing stand unit main body 1
A second plate member 28 is supported by the photographing stand unit main body 16a via a shaft portion 28a that is received in an arcuate guide groove 26 provided on both sides of the photographing table unit body 16a. Both plate members 24 and 28 are interconnected via a pivot 32 to define a gap 30 between their lower ends for allowing passage of the recording medium. A lid member 34 for opening and closing the gap 30 is pivotally attached to the shaft portion 28a. Lid member 3
4 receives a spring force from a spring 36 toward a position where the gap 30 is closed.

The shaft portion 28a is caused to reciprocate along the guide groove 26 between one end 26a and the other end 26b of the guide groove by using, for example, a crank device (not shown). When the shaft portion 28a is further moved toward the other end 26b from the position shown in FIG. 1, the lid member 34 is provided with a fulcrum by a stopper 38 provided on the photographing table unit main body 16a.
The gap 30 is opened by swinging around the fulcrum. When the shaft portion 28a is in the position shown in FIG. 1 and closer to the one end 26a of the guide groove 26 than the position shown in FIG. 1, the gap 30 is closed by the cover member 34. When the holder 20 receives the recording medium in the attitude shown in FIG. While being sandwiched between the members 24 and 28, the recording medium is held in a photographing position indicated by the symbol A, which is close to and parallel to the front surface of the photographing stage unit 16. Further, when the recording medium is irradiated with X-rays, the shaft portion 28a is then moved toward the other end 26b of the guide groove 26, so that the holder 20 can move the irradiated recording medium to the It is discharged through the gap 30.

When the recording medium sent to the imaging platform unit 16 is irradiated with radiation such as X-rays, α-rays, β-rays, electron beams, or ultraviolet rays, it stores and records part of this radiation internally as image information. ,after that,
This is a stimulable phosphor sheet that exhibits stimulated luminescence according to a radiation image accumulated by being irradiated with excitation light such as visible light.

A first fixed conveyance means 2a is provided near the upper edge of the opening 14 for feeding the sheet to the photographing table unit 16, and a first fixed conveying means 2a is provided near the lower edge of the opening 14 to feed the sheet to the photographing table unit 16. a second fixed conveyance means 2b for receiving the sheet on which a radiation image has been accumulated and recorded by being irradiated with X-rays;
is provided. The sheet on which the radiation image has been accumulated and recorded is sent to an image reading section 46 via a belt conveying device 40 provided in association with the second fixed conveying means 2b, and belt conveying devices 42 and 44 following the belt conveying device. . The sheet is
It is scanned by excitation light 48 from an excitation light source in an image reading section 46 and exhibits stimulated luminescence according to the accumulated radiation image information. This stimulated luminescence light is converted into an electrical signal for obtaining an image by a photoelectric reading device 50 such as a photomultiplier tube, and this electrical signal is
For example, it is used to reproduce a visible image on an image display device such as a CTR or on a recording medium such as photographic film. The sheet whose radiation image information has been read by the image reading section is sent to the erasing section 58 via belt conveyors 52, 54 and conveying rollers 56, where the remaining radiant energy is removed by light irradiation, heating, etc. The sheet is then released and returned to a reusable condition. This sheet is sent via a conveyance roller 60 to a belt conveyance layer device 62 provided in association with the first stationary conveyance means 2a, and again via the first stationary conveyance means 2a to the photographing platform unit 16. sent to.

Refer to FIGS. 2 and 3 for details regarding the structure related to the conveyance path of the sheet from the first fixed conveyance means 2a to the photographing platform unit 16 to the second fixed conveyance means 2b. I will explain.

A pair of upright internal members 64 are laterally spaced from each other and extend vertically along opposite sides of the opening 14 within the housing 12 and are connected to the first and second stationary conveying means. 2a, 2
b are arranged across the guide members 64 at the upper and lower parts of the guide members so as to be spaced apart from each other in the vertical direction.

The photographing table unit 16 disposed between both the fixed conveyance means 2a and 2b has a unit main body 16a.
Through a pair of engaging portions 66 provided on both sides of the
It is slidably engaged with the guide member 64 and can reciprocate in the vertical direction between both fixed conveying means 2a and 2b through a stroke exceeding the length of the sheet. A drive device 72, such as an electric motor, is secured via a bracket 70 to an upper frame member 68a disposed across the pair of upright internal members 64 and secured to the top of the guide members. A male threaded member 74 is fixed to the output shaft 72a of the motor 72 in series with the drive shaft. The male screw member 74 vertically passes through the photographing table unit 16 and is screwed into a female screw member 76 fixed to the top of the photographing table unit. Therefore, by controlling the operation of the drive device 72, it is possible to move the imaging platform unit 16 to a desired height position between the fixed conveyance means 2a and 2b and to position it at the desired height position. can.

At the entrance 78a (see FIG. 2), which is the upper end opening of the photographing table unit 16, there is a first conveying means 6a for receiving the sheet sent toward the entrance and conveying the sheet to the holder 20. An outlet 78b (see FIG. 2), which is the opening at the lower end of the photographing platform unit 16, is provided with an outlet 78b (see FIG. 2) for discharging the sheet released from the holder 20 toward the second fixed conveyance means 2b. A second transport means 6b is provided. Further, for example, as shown in the figure, between the holder 20 and the second conveying means 6b, a third conveying means serving as an auxiliary conveying means for directing the sheet discharged from the gap 30 of the holder 20 toward the second conveying means 6b is provided. A conveying means 6c is provided.

When the photographing platform unit 16 moves to a position close to either the first or second fixed conveyance means 2a, 2b, the fixed conveyance means 2b or 2a located on the opposite side and the fixed conveyance means Adjacent said first or second conveying means 6b, 6
A gap that exceeds the length of the sheet is created between the sheet and the sheet, making it difficult to convey the sheet smoothly. In order to prevent this, both fixed conveyance means 2
Intermediate transport means 8a and 8b are provided between a and 2b, respectively, on the sides of the entrance 78a and exit 78b of the photographing unit 16.

In the illustrated example, each fixed conveyance means 2a, 2b, each conveyance means 6a, 6b, 6c, and each relay conveyance means 8a, 8b each includes a pair of rollers 80. Each roller 80 has a roller main body 80b having a uniform outer diameter along its shaft portion 80a, the outer diameter of each roller main body 80b is approximately equal, and the length dimension of each roller main body 80b is That is, it is smaller than the width dimension of the sheet. A pair of pulleys 82 having an outer diameter smaller than the outer diameter of the roller body 80b are arranged on the shaft portion 80a of each roller 80 except one roller of the third conveying means 6c on both sides of the roller body 80b. has been done. A pair of pulleys 82 of each roller 80 are supported by the shaft portion so as to be rotatable with respect to the roller main body 80b with an interval smaller than the width of the sheet. Further, each of the transport means 2a, 2b, 6
A sprocket 84, which is an engaging part, is fixed to one end of the shaft part 80a of one of the rollers 80 in a, 6b, 6, 8a, and 8b, and the outer diameter of the sprocket, that is, the pitch circle, is the outer diameter of the roller body. approximately equal to the diameter.

The shaft portion 80a of each roller 80 of the first fixed conveyance means 2a is supported by the frame member 68a via an upper bracket 86a, and the shaft portion 80a of each roller 80 of the second fixed conveyance means 2b is supported by the frame member 68a via an upper bracket 86a.
is supported on the lower frame member 68b via a lower bracket 86b. Further, the shaft portions 80a of the rollers 80 of the first to third conveying means 6a to 6c are arranged on both sides of the photographing table unit main body 16a so that the sprocket 84 is located outside the photographing table unit 16. Supported.

For each relay conveyance means 8a and 8b, one support member 88a and 88b is provided above and below the photographing platform unit 16, respectively, and is guided in the vertical direction by the pair of straight inner members 64. There is. The upper support member 88a supports each shaft portion 80a of the pair of rollers 80 of the upper relay conveyance means 8a, and the lower support member 88b supports each shaft portion 80a of the pair of rollers 80 of the lower relay conveyance means 8b.
is supported. Both support members 88a and 88
b are mutually connected via a connecting member 90, whereby both relay conveyance means 8a and 8b
are movable integrally with each other in the vertical direction.

the photographing table unit 16 or first and second conveying means 6a provided on the photographing table unit;
6b and the relay conveyance means 8a, 8b, spacers 92 are provided on the upper and lower surfaces of the imaging platform unit 16, respectively, so that they can abut on the upper support member 88a and the lower support member 88b. In order to prevent interference between each fixed conveyance means 2a, 2b and relay conveyance means 8a, 8b,
An upper support member 88 is provided on the lower surface of the upper bracket 86a and the upper surface of the lower bracket 86b, respectively.
A spacer 94 is provided that can come into contact with the lower support member 88b and the lower support member 88b.

When the photographing table unit 16 is moved upward by the operation of the driving device 72, when the spacer 92 of the photographing table unit 16 comes into contact with the support member 88a, both relay conveying means 8a and 8b move the photographing table unit 16 upwardly. It is taken to the base unit 16. The connecting member 90 connects both relay conveyance means 8a and 8b.
When the photographing platform unit 16 is closest to one of the fixed conveying means 2a or 2b, the length dimension of the intermediate conveying means 8b or 8a adjacent to the other fixed conveying means 2b or 2a is
and the distance between the relay conveyance means and the conveyance means 6b or 6a adjacent to the relay conveyance means are set to be equal to or less than the length of the sheet. Therefore, regardless of the height position of the photographing platform unit 16, the interval between adjacent conveying means is variable, that is, the interval between adjacent conveying means is variable.
The distance between the fixed conveyance means 2a and the relay conveyance means 8a,
an interval between the relay conveyance means and the first conveyance means 6a;
The distance between the second conveyance means 6b and the relay conveyance means 8b, and the distance between the relay conveyance means and the fixed conveyance means 2b are always equal to or less than the length of the sheet.

Shaft portion 80 of one roller 80 of each of the conveying means
A chain 96, which is an endless drive transmission member, is arranged around each sprocket 84 provided at the sprocket 84. As shown in FIG. 3, in order to ensure that the chain 96 engages with the sprocket 84 of the auxiliary conveying means 6c, which is located at a position deviated from the linear sprocket row, the path of the chain is changed. Idling sprocket 8 for partial change
4' is provided. An output shaft 98a of a drive device 98, such as an electric motor, is coaxially coupled to the shaft portion 80a of one of the rollers 80 of the fixed conveyance means 2b. The rotational force of the drive device 98 is applied to the pair of rollers 80 of each conveying means via the chain.
can be conveyed to one side. As a result, the pair of rollers of each conveying means are rotated so as to convey the recording medium downward in the figure through mutual cooperation.

A pair of belt-shaped guide members 100 that engage with the pulley 82 are arranged on both sides of the roller body 80b of each roller 80, respectively. Guide member 1
00 is made of a flexible belt member with a thin end, for example, and is clearly shown in FIG. 3 to restrain movement of the sheet conveyed between the pair of rollers 80 in the sheet thickness direction. As shown in FIG.
A pair of rollers 80 b, 6a, 6b, 8a, 8b
A pair of pulleys 82 are engaged with the corresponding pulleys so as to extend between the pair of pulleys 82. The upper ends of the pair of guide members 100 provided on both sides of the roller body 80b are respectively fixed to the upper frame member 68a so that the distance between them gradually increases toward the tip, and Each lower end of the guide member 100 is connected to the lower frame member 68 such that the distance therebetween gradually increases toward the tip thereof.
b are fixed via spring members 102 for applying tension to each of them.

Referring to FIG. 3, a pair of guide members 10 are provided on each side of the roller main body 80b.
One of the guide members 100a of 0 does not engage with the one roller 80 of the auxiliary conveyance means 6c, and the other guide member 100b does not engage with the other roller 80 of the auxiliary conveyance means 6c, that is, the roller 80 of the auxiliary conveyance means 6c. The pulley 82 is engaged with the pulley 82 . Both guide members 10
0, 100a, and 100b are spaced apart from each other by a guide member, that is, a plurality of idle pulleys 104, between the two transport means 6a and 6b to prevent interference with the holder 20 disposed between the two transport means. has been increased.

In the photographing table 10, when the rollers 80 of each of the conveying means 2a, 2b, 6a, 6b, 8a, 8b are simultaneously driven by the driving means including the driving device 98 and the chain, the upper and lower positions are fixed. The unexposed or regenerated sheet sent between the rollers 80 of the conveyance means 2a passes between the rollers 80 of the upper relay conveyance means 8a, and is then delivered to the photographing platform unit 16 at a desired height position. It is sent between both rollers 80 of the first conveying means 6a provided at the entrance 78a, and taken into the photographing table unit 16 by these rollers.

When conveying the sheet from the upper fixed conveying means 2a to the photographing table unit 16, as described above, regardless of the height position of the photographing table unit 16, the upper relay conveying means 8a, the upper fixed conveying means 2a and The distance from the first conveyance means 6a always does not exceed the length of the sheet. Therefore, the sheet is conveyed to the subsequent conveyance means while being held by at least one of the upper fixed conveyance means 2a, the upper intermediate conveyance means 8a, and the first conveyance means 6a. The sheet is not damaged by free fall during this transport.

The sheet that has passed through the first conveyance means 6a is
As described above, when the sheet is irradiated with X-rays for photographing while being held in the holder 20, the sheet passes through the gap 30 of the holder 20 and is ejected between the rollers 80 of the auxiliary conveying means 6c. , from the auxiliary conveying means to between both rollers 80 of the second conveying means 6b. Said second conveyance means 6
The sheet sent to the position b is discharged from the photographing table unit 16 through the outlet 78b, passes between both rollers 80 of the lower relay conveying means 8b, and is sent to between the two rollers 80 of the lower fixed conveying means 2b.

When conveying the sheet from the photographing platform unit 16 to the lower fixed conveying means 2b, as described above, regardless of the height position of the photographing table unit 16, the lower intermediate conveying means 8b and the lower fixed conveying means 2b
And the distance from the second conveyance means 6b always does not exceed the length dimension of the sheet. Therefore,
The sheet can be conveyed to the subsequent conveying means while being held by at least one of the second conveying means 6b, the lower intermediate conveying means 8b, and the lower fixed conveying means 2b. is not damaged by free fall during this transport.

Therefore, when the sheet is transported through the photographing platform unit 16, it is possible to reliably transport the sheet without damaging the sheet, and
The height position of the photographing table unit can be freely selected between the fixed transport means 2a and 2b, thereby making it possible to move the photographing table unit to a photographing position according to the part to be photographed.

Further, since the outer diameter of each roller 80, that is, the outer diameter of the roller body 80a, is approximately equal, and the pitch circle diameter of the sprocket 84, which is the engaging portion of the roller 80, is approximately equal to the outer diameter of the roller body 80a, for example, , the sheet is placed on the upper fixed conveyance means 2a.
When the sheet is conveyed from the top through the upper relay conveying means 8a to the first conveying means 6a, the sheet is simultaneously held by each roller 80 of at least two of these three conveying means. Even if the photographing table unit is moved while the sheet is being transported, and even if the relay conveying means moves in accordance with the movement of the photographing table unit, the conveyance of the sheet by the rollers 80 of each conveying means as seen from a stationary system will not continue. The speeds will be equal. Therefore, even if the photographing table unit is moved to adjust the height while the sheet is being conveyed, the pulling force between the conveying means is applied to the sheet due to the movement of the photographing table unit. There is no action and no deflection is applied to the recording medium. Therefore, even while the sheet is being conveyed between the fixed conveyance means, the position of the photographing stand unit can be adjusted without damaging the sheet.

In this embodiment, the outer diameters of each roller 80 are approximately equal, but if the outer diameter of each roller and the pit diameter of the engaging portion of the roller are equal, the distance between each roller is approximately equal. The outer diameter may be different.

Next, the relationship between the outer diameter of each roller 80 and the pitch diameter of the sprocket 84 will be described in detail. Assuming that the outer diameter of each roller 80 is D and the pitch circle diameter of the sprocket 84 is d, and that the two are not equal, the following equation V'=(V-v)D/d+v (1) holds true. Here, V and V' are the speed of the chain and the transport speed of the recording medium by the roller 80, respectively, as seen from the stationary system, and v indicates the speed of the roller 80 relative to the stationary system, that is, the upward or downward movement speed of the roller 80. . The first right-hand side of equation (1)
The term represents the circumferential speed of the roller 80 seen from the motion system, and equation (1) can be rewritten as the following equation: V'=VD/d-(1-D/d)v...(1') can. As is clear from equation (1'), when D/d=1, that is, roller 8
By making the outer diameter of the sprocket 84 equal to the pitch diameter of the sprocket 84, the speed of the chain seen from the stationary system and the speed of transport of the recording medium by the roller 80 can be adjusted regardless of whether the roller 80 moves upward or downward. can be made equal. The error between the outer diameter of the roller 80 and the pitch circle diameter of the sprocket 84 is preferably ±2% or less.

Further, in the photographing table according to the present invention, even when the photographing table unit 16 is moving, the pair of guide members 100 restrains the movement of the sheet sent between them in the sheet thickness direction. By doing so, the leading edge of the sheet is reliably guided between both rollers 80 of each of the following conveying means.
Damage to the leading edge of the sheet can be prevented, and the sheet can be conveyed more reliably.

In the above, an example has been described in which one transport relay means is provided above and below the photographing stand unit, but depending on the interval between the two fixed transport means, that is, the required number of photographing stand units can be changed. Depending on the stroke, multiple sets of relay conveyance means can be provided, and conversely, especially when the stroke of the photographing platform unit is smaller than the length dimension of the recording medium, the relay conveyance means may be unnecessary. It can be done.

According to the present invention, as described above, each of the rollers of the pair of fixed conveyance means, the conveyance means provided on the photographing platform unit, and the relay conveyance means has an outer diameter and an outer diameter of the engaging portion provided on the rollers. Since the diameters of the rollers are configured to be equal, the speed at which the recording medium is transported by each roller when viewed from the stationary system is the same even when the imaging platform unit is moving.

Therefore, according to the present invention, when the recording medium is being conveyed while being simultaneously held by each roller of each of the conveying means, the photographing table unit is moved in order to adjust the position of the photographing table unit. Even if the imaging platform unit is moved, no tensile force is applied to the recording medium between the conveyance means, and the recording medium is not bent. Even while the recording medium is being conveyed between the fixed conveyance means, the position of the photographing platform unit can be adjusted without damaging the recording medium.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a photographing table according to the present invention, and FIGS. 2 and 3 are a front view and a side view respectively showing the photographing table according to the present invention with its housing removed and partially enlarged. It is a diagram. 2, 2a, 2b: fixed conveyance means, 6, 6a, 6
b, 6c: Transport means for photographing table unit, 16: photographing table unit, 20: holder, 46: image reading section, 50: photoelectric reading device, 60: erasing section,
68a, 68b: frame member, 78a: entrance,
78b: Exit, 80: Roller, 84: Sprocket, 96: Chain.

Claims (1)

[Scope of Claims] 1. A pair of fixed conveying means fixedly arranged at a distance from each other, and a reciprocating movement is possible between the pair of fixed conveying means, and one of the pair of fixed conveying means a photographing platform unit provided with a conveying means for receiving a sheet-like recording medium sent by one of the fixed conveying means and discharging it to the other fixed conveying means; each of the pair of fixed conveyance means and the conveyance means have at least one pair of rollers, and at least one roller of the pair of rollers has a An engaging portion for transmitting a driving force from the driving means for conveying the sheet-like recording medium through the rollers through cooperation is provided so as to be engageable with the driving means, and the driving means , at least one endless drive transmission member stretched between the pair of fixed conveying means and the engaging portions provided on the rollers constituting the conveying means; each having an outer diameter approximately equal to the outer diameter of each of the rollers on which the joint portion is provided;
Radiographic imaging table. 2. The drive transmission member is a chain, and the engaging portion is a sprocket provided coaxially with the roller so as to be rotatable integrally with the roller provided with the engaging portion. The radiation imaging table according to item 1. 3. Claims in which the drive transmission member is a timing belt, and the engaging portion is a gear coaxially provided with the roller so as to be rotatable integrally with the roller on which the engaging portion is provided. The radiation imaging table according to item 1. 4. The photographing platform unit includes a holder for holding the recording medium at a photographing position, and the conveying means provided in the photographing table unit has a holder for receiving the recording medium sent from the one fixed conveying means. a first conveyance means provided at an entrance and provided with a roller for conveying the recording medium to the holder; and a first conveyance means provided at an exit for discharging the recording medium and transporting the recording medium to the other fixed conveyance means. a second conveying means including a roller for ejecting; and a second conveying means provided between the holder and the second conveying means for conveying the recording medium discharged from the holder to the second conveying means. The radiographic imaging stand according to any one of claims 1 to 3, comprising an auxiliary conveyance means having rollers. 5. According to claim 4, the sheet-like recording medium is a stimulable phosphor sheet that exhibits stimulated luminescence according to radiation image information accumulated and stored by irradiation with excitation light. The radiographic imaging table described. 6. The stimulable phosphor sheet that has passed through the other fixed conveyance means is transferred to an image reading section for reading radiation image information recorded on the stimulable phosphor sheet in the imaging platform unit, and the stimulable phosphor sheet that has passed through the image reading section. Claim 5, wherein the stimulable phosphor sheet is returned to the one fixed conveyance means through an erasing section for releasing residual radiant energy.
The radiographic imaging table described in Section 1. 7. The image reading unit includes an excitation light source for irradiating the stimulable phosphor sheet with excitation light to obtain stimulated luminescence light according to radiation image information recorded on the stimulable phosphor sheet, and 7. The radiographic imaging stand according to claim 6, further comprising a photoelectric reading device for optically reading the stimulated luminescence light from the phosphor sheet to obtain an image signal.