JP4037544B2 - Scanning apparatus for sheet-like recording medium - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a scanning apparatus for a sheet-like recording medium for reading radiographic image information of a subject carried on a sheet-like recording medium, for example, a stimulable phosphor sheet.
[0002]
[Prior art]
For example, using a stimulable phosphor (stimulable phosphor), radiation image information of a subject such as a human body is temporarily recorded, and the radiation image information is reproduced on a photographic material such as a photographic film, or a CRT. For example, a system that outputs a visible image to the image is known.
[0003]
The stimulable phosphor accumulates a part of this radiation energy by irradiation with radiation (X-rays, α-rays, γ-rays, electron beams, ultraviolet rays, etc.), and later accumulates by irradiation with excitation light such as visible light. It refers to a phosphor that exhibits stimulated emission according to energy. This stimulable phosphor is usually used as a sheet-like stimulable phosphor sheet (sheet-like recording medium) because of ease of handling and the like.
[0004]
In the above system, for example, an imaging unit that temporarily records radiation image information of a subject on a stimulable phosphor sheet, and the radiation image information obtained by irradiating the stimulable phosphor sheet on which the radiation image information is recorded with excitation light. A photoelectric reading unit and an erasing unit for erasing radiation image information remaining in the stimulable phosphor sheet after reading, and circulating or reciprocating the stimulable phosphor sheet in the apparatus, A so-called built-in radiation image information reading apparatus is employed.
[0005]
FIG. 8 is an explanatory diagram of the internal configuration of a general radiation image information reading apparatus 1. The radiological image information reading apparatus 1 irradiates the radiographic image by irradiating a laser beam L as excitation light to the image-capturing unit 2 that temporarily records radiographic image information of a subject on the stimulable phosphor sheet S. A reading unit 3 for photoelectrically reading information; an erasing conveyance unit 4 for erasing radiation image information remaining on the stimulable phosphor sheet S after reading; and a circulation conveyance system 5 for circulating the stimulable phosphor sheet S; And a stacker unit 7 in which a magazine 6 for storing the stimulable phosphor sheet S is disposed.
[0006]
The reading unit 3 includes a sub-scanning conveyance system 8 that conveys the stimulable phosphor sheet S in the sub-scanning direction (arrow A direction), and a main scanning direction with respect to the stimulable phosphor sheet S that is conveyed in the sub-scanning direction. An optical system 9 that irradiates laser light L in a direction (substantially orthogonal to the sub-scanning direction), and a condensing system that photoelectrically reads the stimulated emission light generated from the stimulable phosphor sheet S by irradiation with the laser light L. 10.
[0007]
[Problems to be solved by the invention]
By the way, in the reading unit 3 described above, the stimulable phosphor sheet S is sub-scanned and conveyed in the horizontal direction (arrow A direction), so that the reading unit 3 is considerably elongated in the horizontal direction. Thereby, the radiation image information reading apparatus 1 is considerably enlarged as a whole in the depth direction (arrow D direction).
[0008]
SUMMARY OF THE INVENTION An object of the present invention is to provide a scanning apparatus for a sheet-like recording medium that can achieve a further reduction in size and a high-quality reading operation with a simple configuration.
[0009]
[Means for Solving the Problems]
In the sheet-like recording medium scanning apparatus according to the present invention, the sheet-like recording medium is irradiated with excitation light while being sub-scanned and conveyed in the vertical direction . As a result, the scanning device has a vertically mounted structure, and the dimensions in the depth direction are shortened all at once compared to the conventional horizontally mounted structure, and the entire device can be reliably reduced in size.
[0010]
At that time, in order to read image information with high accuracy, the sheet-like recording medium needs to be sub-scanned and transported at a constant speed. Usually, feedback control is performed while observing the rotational speed of the DC motor. Yes. However, when the sheet-like recording medium is sub-scanned and conveyed vertically downward, the sheet-like recording medium falls due to its own weight, and a negative load acts on the DC motor to accurately feedback-control the DC motor. Will not be able to.
[0011]
Therefore, in the present invention, there is provided load means for reducing the falling speed due to the weight of the sheet-like recording medium by holding both surfaces of the sheet-like recording medium, and the sub-scanning conveying means is decelerated by the load means. Further, the conveying speed of the sheet-like recording medium is maintained. That is, the load unit in order to maintain the conveying speed of the decelerated sheet-form recording medium, the motor having the sub-scanning conveyance means, to function so that by the action of load in the rotational driving direction of the motor. Thereby, for example, a positive load acts on the DC motor, and feedback control of the DC motor can be easily and reliably performed.
[0012]
The load means includes first and second guide members that are in contact with both sides of the sheet-like recording medium over the entire width, and the second guide member is movable forward and backward with respect to the first guide member via an elastic body. is there. Thereby, with a simple configuration, the sheet-like recording medium can be reliably held and its dropping speed can be effectively reduced. The first guide member is fixed to a fixed frame, and a pair of shaft bodies fixed to both ends of a rod disposed on the second guide member are disposed through the fixed frame, and the shaft body The second guide member is biased toward the first guide member by a spring interposed between the support plate fixed to the frame and the fixed frame.
[0013]
At this time, the first and second guide members are provided with a buffer member on the surface in contact with the sheet-like recording medium, so that the sheet-like recording medium is not damaged or soiled. It is possible to effectively ensure the durability of the medium. This sheet-like recording medium is preferably a stimulable phosphor sheet.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a schematic perspective explanatory view of a radiation image information reading apparatus 20 in which a scanning device for a stimulable phosphor sheet according to an embodiment of the present invention is incorporated. FIG. 2 is an internal configuration of the radiation image information reading apparatus 20. It is explanatory drawing.
[0015]
The radiographic image information reading apparatus 20 includes an elevating unit 24 provided above the base 22, and an apparatus main body 26 is supported on the elevating unit 24 via an actuator (not shown) such as a ball screw or a cylinder so as to be movable up and down. The The radiographic image information reading device 20 functions to circulate two sheets of stimulable phosphor sheets (sheet-like recording medium) S in the apparatus main body 26 and repeatedly perform recording and reading operations of radiographic image information of a subject.
[0016]
As shown in FIG. 2, in the apparatus main body 26, an imaging unit 30 that temporarily records radiation image information of a subject on the stimulable phosphor sheet S, and the stimulable phosphor sheet S on which the radiation image information is recorded. A reading unit (scanning device) 32 that photoelectrically reads the radiation image information by irradiating laser light L as excitation light to the laser beam, and an erasing unit that erases the radiation image information remaining on the stimulable phosphor sheet S after reading 34 and a circulation conveyance system 36 for circulating the two stimulable phosphor sheets S are incorporated.
[0017]
The photographing unit 30 includes a photographing cover 38 attached to the front side of the apparatus main body 26. A photo timer 40 and a grit 42 are sequentially arranged from the subject side (not shown) on the photographing cover 38. On the side 42, a swingable pressing plate 44 for holding the stimulable phosphor sheet S at the photographing position is mounted.
[0018]
The reading unit 32 is disposed substantially parallel to the photographing unit 30, and is sub-transported and transported by a sub-scan transport unit 46 that sub-scans and transports the stimulable phosphor sheet S vertically downward (arrow X direction). A laser beam irradiation means (excitation light irradiation means) 48 for performing main scanning by irradiating the stimulable phosphor sheet S with laser light L as excitation light in a substantially horizontal direction (arrow Y direction), and the stimulable phosphor Reading means 50 that collects the photostimulated luminescence emitted from the sheet S and photoelectrically reads the radiation image information carried on the stimulable phosphor sheet S, and holds both sides of the stimulable phosphor sheet S Thus, load means 52 for maintaining the falling speed of the stimulable phosphor sheet S due to its own weight at a lower speed than the sub-scan transport speed by the sub-scan transport means 46 is provided.
[0019]
The laser beam irradiation means 48 is provided with an optical system 51 for once deriving the laser beam L vertically downward and then bending the laser beam L substantially in the horizontal direction to irradiate the stimulable phosphor sheet S. . In the vicinity of the irradiation position of the laser beam L of the stimulable phosphor sheet S, a condensing guide 53 that collects the stimulated emission light emitted from the stimulable phosphor sheet S by the irradiation of the laser beam L is arranged. Yes. The condensing guide 53 is connected to a photomultiplier (not shown) to form a reading unit 50.
[0020]
The sub-scanning conveying unit 46 includes first and second roller pairs 54 and 56 that are arranged in the vertical direction (arrow X direction) with a predetermined distance therebetween. The first and second roller pairs 54 and 56 are rotationally driven synchronously via transmission means (not shown) such as belt / pulley means connected to a motor (for example, DC motor) 58. The first and second roller pairs 54 and 56 are configured to sandwich and convey both side portions (hereinafter referred to as ear portions) where the radiation image information of the stimulable phosphor sheet S is not recorded and read. .
[0021]
As shown in FIG. 3 and FIG. 4, the load means 52 is disposed between the first and second roller pairs 54, 56 and close to the first roller pair 54 side. A plate-shaped first guide member 60 that is in contact with the imaging surface (one surface) over the entire width, and a back surface side (the other surface) of the stimulable phosphor sheet S is in contact with the entire width, and via a spring (elastic body) 62. And a second guide member 64 having a substantially cylindrical shape that is movable back and forth with respect to the first guide member 60.
[0022]
The first guide member 60 is fixed to the fixed frame 66, and a pair of shaft bodies 68 are fixed to both ends of a small-diameter rod 67 disposed in the second guide member 64. The shaft body 68 is disposed through the fixed frame 66, and a spring 62 is interposed between the support plate 70 fixed to the shaft body 68 and the fixed frame 66. The second guide member 64 is urged toward the first guide member 60 through the elastic force of the spring 62, and the second guide member 64 is separated from the first guide member 60 on the shaft body 68. The driving means 72 that presses in the direction is engaged.
[0023]
The driving means 72 includes a driving motor 74, and a crank member 78 is engaged with the driving motor 74 via a belt / pulley means 76. One end of a long first link 82 is connected to an eccentric pin 80 provided on the crank member 78, and one end of a short second link 84 is swingably connected to the other end of the first link 82. A rod-shaped pressing member 88 is engaged with the second link 84 via the third link 86, and the pressing member 88 can contact and separate from the pair of shaft bodies 68.
[0024]
The first and second guide members 60 and 64 are provided with cushioning materials 60a and 64a at least on the surface in contact with the stimulable phosphor sheet S. The buffer materials 60a and 64a are made of, for example, a polyester cloth material, and are affixed to the surfaces of the SUS materials constituting the first and second guide members 60 and 64.
[0025]
On the downstream side of the irradiation position of the laser light L, guide means 90 that is in contact with at least one surface of the stimulable phosphor sheet S, for example, the imaging surface is disposed. The guide means 90 is disposed close to the upper side of the second roller pair 56, is configured in a plate shape extending over the entire width of the stimulable phosphor sheet S, and a buffer material 92 is provided on the surface thereof. Yes.
[0026]
A curved conveyance path 100 for curvedly conveying the stimulable phosphor sheet S is provided on the downstream side of the second roller pair 56. The curved conveyance path 100 is provided with first and second curved guide plates 102 and 104 that are separated from each other.
[0027]
As shown in FIG. 2, the erasing unit 34 is disposed substantially in parallel with the photographing unit 30 and the reading unit 32, and includes a plurality of erasing light sources 110 extending in the vertical direction. The erasing light source 110 may be arranged extending in the horizontal direction.
[0028]
The circulation conveyance system 36 is disposed between the imaging unit 30 and the reading unit 32, and includes a rotation conveyance unit 112 that rotates the stimulable phosphor sheet S by 180 ° and conveys the storage phosphor sheet S from the imaging unit 30 to the reading unit 32. . The swivel conveying means 112 is provided between a roller pair 114 disposed near the sheet entrance / exit of the photographing unit 30 and a roller pair 116 disposed above the reading unit 32, and is formed with a curved guide plate 118, which is curved. 120 and a plurality of guide rollers 122 disposed below the curved guide plates 118 and 120. The curved guide plates 118 and 120 are configured to be narrow in order to guide the ear portion of the stimulable phosphor sheet S. The roller pairs 114 and 116 are rotationally driven via a motor 124.
[0029]
Below the pair of rollers 116, a pair of guide plates 126 that guide both sides of the ear portion of the stimulable phosphor sheet S are provided toward the reading unit 32, and on the exit side of the reading unit 32, the accumulation property is provided. A curved guide plate 130 for guiding the ears for guiding the phosphor sheet S vertically upward from the curved conveyance path 100 is disposed. The end of the curved guide plate 130 extends linearly in the vertically upward direction.
[0030]
In the vicinity of the curved guide plate 130, a roller pair 134 that is rotationally driven by a motor 132 is disposed. A guide plate 136 extends in the horizontal direction from the vicinity of the roller pair 134 toward the light collecting guide 53, and a guide plate extends in the vertical direction via a curved guide plate 138 at the end of the guide plate 136. 140 is provided. The guide plate 140 extends along the erasing portion 34 and is provided with a curved guide plate 142 on the upper side thereof, and an end portion of the curved guide plate 142 is disposed corresponding to the curved guide plate 118. Below and above the guide plate 140, roller pairs 148 and 150 that are rotationally driven under the action of motors 144 and 146 are disposed, respectively.
[0031]
The operation of the radiation image information reading apparatus 20 configured as described above will be described below.
[0032]
Two storage phosphor sheets S are accommodated in the apparatus main body 26, and when one storage phosphor sheet S is disposed in the photographing unit 30, the other storage phosphor sheet S is erased. The unit 34 stands by (see FIG. 2). In the imaging unit 30, the radiographic image information of the subject is recorded (with the stimulable phosphor sheet S held at the imaging position via the presser plate 44 while the presser plate 44 is swung to the subject side (not shown). Shooting).
[0033]
The storable phosphor sheet S after the photographing process swings inward integrally with the pressing plate 44 and is then sent out to the roller pair 114 side. The roller pair 114 is rotationally driven via a motor 124, and the stimulable phosphor sheet S is sent to the swivel conveying means 112 under the rotating action of the roller pair 114. In this swivel conveying means 112, the storage phosphor sheet S does not come into contact with other members under the guiding action of the curved guide plates 118 and 120 and the plurality of guide rollers 122 without the imaging surface of the storage phosphor sheet S coming into contact with other members. Is rotated 180 ° and sent to the roller pair 116, and then received by the guide plate 126 arranged in the vertical direction under the rotating action of the roller pair 116. The stimulable phosphor sheet S is fed to the sub-scanning conveying means 46 constituting the reading unit 32 with the ears guided by the guide plate 126.
[0034]
In the sub-scanning conveying means 46, the first and second roller pairs 54 and 56, which are respectively arranged up and down under the drive action of the motor 58, are rotationally driven. For this reason, the stimulable phosphor sheet S is first transported in the sub-scanning direction in the direction of arrow X (vertically downward) with the ears sandwiched between the first roller pair 54.
[0035]
At this time, in the load means 52, the pressing member 88 presses the shaft body 68 against the elastic force of the spring 62 under the action of the driving means 72, and the second guide member 64 is separated from the first guide member 60. (See FIG. 5). Next, when the leading end portion of the stimulable phosphor sheet S that is sandwiched between the first roller pair 54 and is sub-scanned and conveyed in the direction of the arrow X enters between the first and second guide members 60 and 64, the driving means 72 is moved. The drive motor 74 which comprises is driven.
[0036]
Therefore, as shown in FIGS. 3 and 4, the crank member 78 rotates via the belt / pulley means 76 and is pressed via the first and second links 82 and 84 under the swinging action of the eccentric pin 80. The member 88 swings in a direction away from the shaft body 68. Therefore, the second guide member 64 is urged toward the first guide member 60 side by the elastic force of the spring 62, and the first and second guide members 60, 64 cover the both sides of the stimulable phosphor sheet S in the full width. (See FIG. 6).
[0037]
The stimulable phosphor sheet S is held by the first and second guide members 60 and 64, and the ear portion on the tip side is sandwiched between the second roller pair 56, and the first and second roller pair 54, Sub-scan transported in the direction of arrow X through 56 (see FIG. 7). Here, the laser light L is derived from the laser light irradiation means 48, and after this laser light L has once traveled vertically downward, it is directed substantially horizontally through the optical system 51, and the stimulable phosphor sheet S The main scanning is performed by irradiating the imaging surface. By the irradiation of the laser light L, the stimulated emission light is generated from the photographing surface of the stimulable phosphor sheet S, and this stimulated emission light is condensed through the condensing guide 53 and read photoelectrically by a photomultiplier (not shown). It is done.
[0038]
In this case, the stimulable phosphor sheet S is sub-scanned and conveyed vertically downward via the first and second roller pairs 54 and 56, so that the stimulable phosphor sheet S tends to fall due to its own weight. For this reason, a negative load may act on the motor 58 via the first and second roller pairs 54 and 56 sandwiching the stimulable phosphor sheet S, and the motor 58 may not be feedback controlled. is there.
[0039]
However, in this embodiment, by holding both sides of the stimulable phosphor sheet S, the falling speed due to the self-weight of the stimulable phosphor sheet S is kept lower than the sub-scan transport speed by the sub-scan transport means 46. Load means 52 is provided.
[0040]
As a result, the first and second guide members 60 and 64 constituting the load means 52 hold both surfaces of the stimulable phosphor sheet S, and the frictional resistance thereof reduces the falling speed due to the self-weight of the stimulable phosphor sheet S. The motor 58 can be slowed down and a positive load acts on the motor 58. Therefore, the feedback control of the motor 58 can be performed easily and reliably, and the effect that the accumulative phosphor sheet S can be sub-scanned and conveyed at a constant speed in the vertical downward direction is obtained.
[0041]
Moreover, as shown in FIG. 6, the stimulable phosphor sheet is sandwiched between the second roller pair 56 on the downstream side of the irradiation position (scanning line) of the laser light L, and on the upstream side of the irradiation position. The first and second guide members 60 and 64 that constitute 52 are held by the first and second guide members 60 and 64. For this reason, the stimulable phosphor sheet S is sub-scanned and conveyed while being pulled in the vertical direction, and there is an advantage that the behavior at the irradiation position of the laser light L is stabilized.
[0042]
Furthermore, buffer materials 60a and 64a are provided on the surfaces of the first and second guide members 60 and 64 so that the stimulable phosphor sheet S is not damaged or soiled. For this reason, it becomes possible to ensure the durability of the stimulable phosphor sheet S effectively.
[0043]
Next, the reading front end side of the stimulable phosphor sheet S is guided from the curved conveyance path 100 to the curved guide plate 130 and conveyed vertically upward under the rotating action of the roller pair 134. Then, after the reading operation of the entire stimulable phosphor sheet S is completed, the roller pair 134 is operated by the motor 132 in a state where the reading rear end side of the stimulable phosphor sheet S is sent to the vicinity of the roller pair 134. Rotated in the reverse direction down.
[0044]
For this reason, the stimulable phosphor sheet S is once transported horizontally along the guide plate 136 with its imaging surface down, and then transported vertically upward via the curved guide plate 138. . Here, the roller pair 148 is rotationally driven under the action of the motor 144, and the stimulable phosphor sheet S is conveyed vertically upward under the guide action of the guide plate 140. Then, the erasing light source 110 constituting the erasing unit 34 is energized, and the radiation image information remaining on the stimulable phosphor sheet S is erased. The storable phosphor sheet S after erasing is waiting in correspondence with the erasing unit 34.
[0045]
On the other hand, when the radiographic image information is recorded on the stimulable phosphor sheet S in the imaging unit 30, another stimulable phosphor sheet S waiting in the erasing unit 34 is post-imaging as described above. While the storage phosphor sheet S is being read by the reading unit 32, the storage phosphor sheet S is sandwiched between the roller pair 150 that is rotationally driven by the motor 146 and sent to the curved guide plate 118 under the guiding action of the curved guide plate 142. It is done. Furthermore, another storage phosphor sheet S is fed into the imaging unit 30 by rotating the roller pair 114 in the opposite direction. The other stimulable phosphor sheet S is subjected to a recording (imaging) process of radiation image information of a subject (not shown) in a state where the other stimulable phosphor sheet S is positioned and held with respect to the imaging unit 30 under the swinging action of the pressing plate 44. .
[0046]
In this case, the reading unit 32 that photoelectrically reads the radiation image information recorded on the stimulable phosphor sheet S performs the accumulation while transporting the stimulable phosphor sheet S vertically downward (arrow X direction). The fluorescent phosphor sheet S is configured to irradiate the laser beam L in a substantially horizontal direction. For this reason, the dimension in the horizontal direction is significantly shortened as compared with the conventional reading unit that performs the main scanning while conveying the stimulable phosphor sheet S in the horizontal direction. Thereby, the apparatus main body 26 has the effect that the dimension of the depth direction (arrow D direction) is shortened at a stretch.
[0047]
In the present embodiment, the load means 52 includes the plate-like first guide member 60 and the cylindrical second guide member 64, but the present invention is not limited to this, and the first and second are not limited thereto. Both guide members 60 and 64 may be formed in a flat plate shape or a cylindrical shape. Further, instead of the load means 52 of the present embodiment, the load means may be configured by changing the oil of the bearings incorporated in the first and second roller pairs 54 and 56 to a highly viscous oil. .
[0048]
Furthermore, a photographic film on which an image is recorded instead of the stimulable phosphor sheet S may be used as the sheet-like recording medium. In this case, a scanning device that scans this photographic film may be employed. .
[0049]
【The invention's effect】
In the sheet-like recording medium scanning device according to the present invention, the sheet-like recording medium is sub-scanned in the horizontal direction in order to irradiate the scanning light in the substantially horizontal direction while carrying the sub-scanning conveyance of the sheet-like recording medium vertically downward. Compared with the conventional horizontal type that conveys, the depth dimension of the apparatus main body can be shortened at once. In addition, by holding both surfaces of the sheet-like recording medium, the dropping speed due to the weight of the sheet-like recording medium is kept lower than the sub-scanning conveying speed by the sub-scanning conveying means. Thereby, for example, a positive load acts on the DC motor, and feedback control of the DC motor can be easily and reliably performed.
[Brief description of the drawings]
FIG. 1 is a schematic perspective explanatory view of a radiation image information reading apparatus in which a stimulable phosphor sheet scanning device according to an embodiment of the present invention is incorporated.
FIG. 2 is an explanatory diagram of an internal configuration of the radiation image information reading apparatus.
FIG. 3 is a perspective view illustrating a main part of the scanning device.
FIG. 4 is an explanatory front view of the scanning device.
FIG. 5 is a diagram illustrating a separated state of a sheet holding unit constituting the scanning device.
FIG. 6 is an explanatory diagram of a state in which a stimulable phosphor sheet is held by the sheet holding unit.
FIG. 7 is an explanatory diagram of a state in which the stimulable phosphor sheet held by the sheet holding unit is sandwiched between a first and a second roller pair.
FIG. 8 is an explanatory diagram of an internal configuration of a radiation image information reading apparatus according to a conventional technique.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 20 ... Radiation image information reading apparatus 26 ... Apparatus main body 30 ... Imaging | photography part 32 ... Reading part 34 ... Erasing part 36 ... Circulation conveyance system 46 ... Sub-scanning conveyance means 48 ... Laser beam irradiation means 50 ... Reading means 52 ... Load means 54, 56, 114, 116, 134, 148, 150 ... roller pair 60, 64 ... guide member 60a, 64a, 92 ... shock absorbing material 62 ... spring 72 ... driving means 78 ... crank member 82, 84, 86 ... link 88 ... pressing member 90 ... guide means 100 ... curved conveyance paths 102, 104, 118, 120, 138, 142 ... curved guide plates

Claims (5)

Sub-scanning conveyance means for sub-scanning conveyance of the sheet-like recording medium vertically downward;
Excitation light irradiation means for irradiating the sheet-like recording medium with excitation light;
Holding both surfaces of the sheet-like recording medium, and having load means for reducing the falling speed due to the weight of the sheet-like recording medium,
The sub-scanning conveying means maintains the conveying speed of the sheet-like recording medium decelerated by the load means ;
The load means applies a load in a rotational drive direction of the motor to a motor included in the sub-scanning conveyance means in order to maintain the conveyance speed of the decelerated sheet-like recording medium. A scanning device for a sheet-like recording medium. The apparatus according to claim 1, wherein the load unit is provided above an irradiation position of the scanning light,
A first guide member in contact with one surface of the sheet-like recording medium over the entire width;
A second guide member that is in contact with the other surface of the sheet-like recording medium over the entire width and is movable forward and backward with respect to the first guide member via an elastic body;
A scanning apparatus for a sheet-like recording medium, comprising:   3. The apparatus according to claim 2, wherein the first and second guide members are provided with a buffer material on at least a surface in contact with the sheet-like recording medium. The apparatus according to claim 1, wherein the sheet-like recording medium is a stimulable phosphor sheet,
Sheet-like recording comprising reading means for condensing stimulated emission light emitted from the stimulable phosphor sheet and photoelectrically reading radiation image information carried on the stimulable phosphor sheet Media scanning device. The apparatus of claim 2.
The first guide member is fixed to a fixed frame;
A pair of shafts fixed to both ends of the rod disposed on the second guide member are disposed through the fixed frame,
The sheet-like recording medium, wherein the second guide member is biased toward the first guide member by a spring interposed between a support plate fixed to the shaft body and the fixed frame. Scanning device.

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