JPS61101359A - Sheet select/transport unit - Google Patents

Abstract

PURPOSE:To form the unit in the caption in compact size, by arranging a plurality of trays inclining at an assigned angle and a sheet transport unit freely movable along a running track above said trays, in case of a select/transport unit applicable to cumulative phosphor sheet etc. CONSTITUTION:Cumulative phosphor sheets 22 carried on belt conveyors 24, 26 are read in information of their sizes by a reading unit 10, carried on conveyors 30, 34, 48, 50 successively, and made free from the remaining radiant ray image information by means of an eliminating unit 42 and are held between belt conveyors 54, 56 of a transport unit 52. They are transferred, under this state, to a plurality of trays 58 inclined at an assigned angle with their openings facing upward and positioned and stopped above respective assigned trays. Then, belt conveyors 54, 56 are put in turning drive and sheets 22 held by them are dropped and stored in trays 58. Thus, the overall unit can be formed in a compact size and subjected to secure select/transport.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sheet sorting and conveying device, and more particularly to a sheet sorting and conveying device configured to distribute sheets, for example, stimulable phosphor sheets, to respective trays according to their size, type, etc. The present invention relates to a sheet sorting and conveying device.

2. Description of the Related Art Recently, a radiation image information recording and reproducing system that obtains a radiation image of a subject using a stimulable phosphor has been attracting attention. Here, storage fluorophores refer to radiation (X-rays, α-rays, β-rays, γ-rays,
A phosphor that accumulates a portion of this radiation energy when irradiated with radiation (rays, electron beams, ultraviolet rays, etc.) and then emits stimulated luminescence light corresponding to the accumulated energy when irradiated with excitation light such as visible light. .

The radiation image information recording and reproducing system described above utilizes this stimulable phosphor, and firstly, radiation image information of a subject such as a human body is recorded on a sheet (hereinafter referred to as a ``stimulable phosphor'') having a layer made of a stimulable phosphor. The information is stored and recorded on a phosphor sheet (also called a phosphor sheet). Then, this stimulable phosphor sheet is scanned with excitation light such as a laser beam to generate stimulated luminescent light, and the resulting stimulated luminescent light is read photoelectrically to obtain an image signal. Based on this, the radiation image of the subject is output as a visible image to a recording material such as a photographic light-sensitive material, or to a CRT or the like. Furthermore, regarding this type of technology, see Japanese Patent Application Laid-open Nos. 55-12429 and 56-1.
No. 1395, etc.

However, this system has the practical advantage of being able to record images over a much wider radiation exposure range than conventional radiographic systems using intensifying screens and X-ray film. That is, in a stimulable phosphor, it is recognized that the amount of emitted light that is stimulated to emit light due to excitation after accumulation is proportional to the amount of radiation exposure over an extremely wide range.

Therefore, even if the amount of radiation exposure changes considerably due to various imaging conditions, the amount of emitted light is read by the photoelectric conversion means with the reading gain set to an appropriate value and converted into an electrical signal, and this electrical signal is converted into an electrical signal. If this is used to output a visible image to a recording material such as a photographic material or a display device such as a CRT, a radiation image that is not affected by fluctuations in radiation exposure can be obtained.

In addition, according to this system, after converting the radiation image information stored in the stimulable phosphor into an electrical signal, appropriate signal processing is performed, and this electrical signal is used to produce recording materials such as photographic light-sensitive materials, CRTs, etc. This has the extremely great effect of providing a visible image to a display device, thereby providing a radiation image with excellent suitability for observation and interpretation (diagnosis).

In such a radiation image information recording and reproducing system, the stimulable phosphor sheet does not store image information;
As mentioned above, this stimulable phosphor sheet may be used repeatedly because it only temporarily holds radiation image information in order to finally give an image to the recording medium. Repeated use in this manner is extremely economical and convenient.

Therefore, in order to reuse the stimulable phosphor sheet, the radiation energy remaining in the stimulable phosphor sheet after reading has been performed by irradiation with excitation light is released by irradiation with light to generate afterimage radiation image information. This stimulable phosphor sheet can be used again for radiographic image recording.

Regarding the technology for erasing the radiation energy remaining in the stimulable phosphor sheet, for example,
No. 11392.

Therefore, in order to erase the remaining image information as described above, the stimulable phosphor sheet, which can be uniformly irradiated with high-intensity erasing light and used for the next image recording, is directly exposed to radiation. Either it is used for image recording, or it is then stored in a tray, waiting for the next radiation image recording.

By the way, especially in relation to the latter case, stimulable phosphor sheets have various types and sizes, and therefore, when temporarily stored, stimulable phosphor sheets of the same type and size Preferably, the sheets are contained in the same tray. However, in order to record new radiographic images, different types and sizes of stimulable phosphor sheets are required depending on the location of the subject, the area to be imaged, etc.
This is because if the same type or size is accommodated in one tray, there is an advantage that the next radiographic image can be taken extremely quickly and accurately. For this purpose, it is already possible to consider an apparatus that has a plurality of trays arranged vertically, as is used in copying machines, and sorts the trays by type or size using an elevating device. However, this type of sorter has a complex structure as a whole, and requires an extremely large space for installation, especially in radiographic image information reading devices that are designed to be unitized and compact. It is not suitable for sorting stimulable phosphor sheets after reading image information by irradiating excitation light and erasing residual image information by irradiating erasing light.

Therefore, as a result of extensive research and repeated trial production, the present inventors discovered that when sorting stimulable phosphor sheets according to predetermined selection criteria such as size or type, multiple trays are placed with their openings facing upward. If the stimulable phosphor sheet is disposed at a predetermined angular displacement, and a stimulable phosphor sheet conveying unit that is self-propelled in the horizontal direction is arranged above the stimulable phosphor sheet, the stimulable phosphor sheet can be adjusted according to the type, size, etc. of the stimulable phosphor sheet. Upon receiving the signal, it stops directly above a specific tray for each type and size, drops the stimulable phosphor sheet of that type and size into the tray, and repeats this for each type and size. This makes it possible to sort stimulable phosphor sheets very smoothly according to their type or size, and it takes up very little space to install.
It has been found that a sheet sorting and conveying device for stimulable phosphor sheets that can be manufactured at low cost is obtained, and the various disadvantages mentioned above are eliminated.

Therefore, an object of the present invention is to provide a sheet sorting and conveying device that can reliably store sheets such as stimulable phosphor sheets in various trays according to their types, sizes, etc., with a simple configuration. be.

In order to achieve the above object, the present invention includes a plurality of trays that are inclined at a predetermined angle with their openings facing upward, and a plurality of trays that are arranged movably along a running path that is arranged above the trays. The sheet conveyance unit includes a belt conveyor held in a frame or a housing and a rotational drive source for driving the belt conveyor, and the sheet conveyance unit is configured to convey the sheet while holding the sheet on the belt conveyor. The unit is transported, positioned and stopped above a predetermined tray, and then the belt conveyor is driven under the driving action of a rotary drive source so that the held sheet is dropped and stored inside the tray. Features.

Next, preferred embodiments of the sheet sorting and conveying device according to the present invention will be described in detail with reference to the accompanying drawings.

First, a radiation image information reading device incorporating a sheet sorting and conveying device according to the present invention will be described below with reference to FIG. This apparatus consists of a radiation image information reading section 10, an erasing unit 42, a transport unit 52, and a sorting section 60, which are physically incorporated in the reading section 10.

The reading section 10 generally includes an optical surface plate 20 that is hollow and supports a light guide sheet 12), a photomultiplier 14, a laser light source 16, and a galvanometer mirror 18. A first belt conveyor 24 is provided to convey the stimulable phosphor sheet 22 to the light guide sheet 12 side, and the exit side of the first belt conveyor 24 is directly below the light guide sheet 12. The belt conveyor 26 is arranged in series with a second belt conveyor 26 installed next to the belt conveyor 26. Note that a nip roller 28 for receiving the stimulable phosphor sheet 22 is disposed on one roller of the second belt conveyor 26.

Further, the second belt conveyor 26 faces a third belt conveyor 30 whose exit side is bent, and the third belt conveyor 30 has a first roller group 32 at its bent portion.
has. Furthermore, a fourth belt conveyor 34 is installed in sliding contact with the third belt conveyor 30 that is bent and extends forward.
is provided, and a first guide member 36 is provided directly above the third belt conveyor 30 and fourth belt comparer 34.

The first guide member 36 faces the second guide member 40 via a pair of rollers 38. Substantially, this second guide member 40 is attached to the erasing unit 42 . That is,
A part of the fifth belt conveyor 44 is provided opposite to the second guide member 40, and as a whole, the fifth belt conveyor 44
enters the lower part of a housing 46 that constitutes an erasing unit 42 for erasing residual images. In this case, the erasing unit 42 includes erasing light sources 45a to 45d therein.

Next, a sixth bending belt conveyor 48 is arranged directly above the fifth belt conveyor 44 and the second guide member 40,
A bending seventh belt conveyor 50 is further provided in contact with the sixth belt conveyor 48. The exit sides of the sixth belt conveyor 48 and the seventh belt conveyor 50 face a conveyance unit 52 that selectively conveys the stimulable phosphor sheets 22 according to their sizes, for example. As will be described later, the conveyance unit 52 has an eighth belt conveyor 54 and a ninth belt conveyor 56 in sliding contact therewith, and the conveyance unit 52 itself is shown in the figure as indicated by an arrow. It is capable of self-propelled in the horizontal direction. In addition, transportation °
A sorting section 60 constituted by a plurality of trays 58 is arranged below the unit 7 52. As can be easily understood from FIG. 1, the tray 5 constituting the sorting section 60
Reference numeral 8 indicates a structure which is arranged side by side with a predetermined angular displacement.

Next, the transport unit 52 configured as described above will be described in more detail with reference to FIGS. 2 and subsequent figures.

The transport unit 52 substantially includes a housing 62 . The side plates 62a, 62b constituting the casing 62 hold a self-propelled motor 61, a motor 63 for driving the belt conveyor 54, 56, and further hold rollers 54a, 54b constituting the belt conveyor 54, 54c, 54
d and 54e are maintained as bridges.

A conveyor belt 64 is attached to these rollers 54a to 54e.
is strung up. On the other hand, the belt conveyor 56 is
a, roller 56b and roller 56'c.

A conveyor belt 66 is attached to these rollers 56a to 56C.
is strung up. Note that the positions of the rotation axes of the rollers 54e and 56c are adjustable so that the tension applied to the belt can be adjusted.

As can be easily understood from FIG. 3, at least the roller 54a and the roller 56a are arranged close to each other, and the rollers 54b and 56b located above them are also arranged close to each other. Further, an auxiliary roller 68 is provided above the belt 64. As shown in FIG. 3, in this case, a sprocket 70 is fitted onto the rotating shaft of the belt drive motor 63, and a chain 7 meshing with this sprocket 70.
2 includes a roller 5 that substantially drives 756 to the belt controller.
It meshes with a sprocket 74 fitted to the rotating shaft of 6a. Note that a gear 76 is fitted onto the rotating shaft of the roller 56a.

On the other hand, a gear 78 is fitted onto the rotating shaft of the roller 54a that substantially drives the belt 64. This gear 78 and the gear 76 mesh with each other. Therefore, when the chain 72 transmits its rotational force to the gear 76 via the sprockets 70 and 74 due to the rotational drive of the motor 63, the gear 78 engages with the gear 76. 76, and as a result, the belt 64 and the belt 66 perform a conveyance operation while slidingly contacting each other within a predetermined range. At this time, the auxiliary roller 6
8 cooperates with the belt 64 to transport the stimulable phosphor sheet 22 conveyed by the belt 64 in the direction of arrow A.

The housing 62 further includes rotating shafts 80 and 82 that are parallel to each other and spaced apart by a predetermined distance using the side walls 62a and 62b.
Attach the shaft. Rollers 84a, 8 are provided at both ends of the rotating shaft 80.
4b, and a roller 86a and a roller 86b are similarly supported at both ends of the rotating shaft 82. A sprocket 88 is attached to the rotating shaft 80, and a sprocket 90 is similarly attached to the rotating shaft of the motor 61. A chain 92 is stretched between the sprocket 88 and the sprocket 90. Therefore, when the self-propelled motor 61 is driven, the sprocket 90 rotates, and the rotational force reaches the sprocket 88 via the chain 92. In this case, rollers 84a, 84b and roller 86a
, 86b are running paths arranged parallel to each other, that is, since they contact the horizontal portions of the angle members 94a, 94b,
When the rotational force of the motor 61 is transmitted to the rollers 84a, 84b as described above, the rollers 84a, 84b move toward the housing 6.
2, the angle members 94a and 94b are displaced and transferred. In this case, a pair of guide rollers 96a, so as to sandwich the vertical portion of the angle member 94b,
96b and guide rollers 93a and 98b are connected to the housing 6.
Since the casing 62 is pivoted to the casing 2, the casing 62 itself can be moved smoothly.

Next, below the angle members 94a and 94b, that is, below the horizontally displacing casing 62, the trays 58a to 58g forming the sorting section 60 are disposed as described above. In this case, the trays 58a to 58g are configured to have different sizes depending on the size of the stimulable phosphor sheets 22 to be sorted. The tray 582
58g are arranged so as to face the transport unit 52 with their opening faces facing upward, and are inclined at a predetermined angle (θ°) with respect to the vertical direction. In this case, the angle is preferably within 45 degrees in order to reduce the surface pressure between the sheets when stacking the stimulable phosphor sheets.On the other hand, when stacking the stimulable phosphor sheets, the curled sheets In order to prevent the sheet from jumping out of the tray even when being conveyed, this angle should be set at 1.
It is preferable that the angle is 5° or more. Although not shown, the trays 58a to 58g can be pulled out toward the front in the figure via handles. Note that the direction in which the sheets are discharged from the sheet discharge section formed by the tip ends of the belts 64 and 66 is at an angle of -5 degrees or more and +15 degrees or less with respect to the inclination angle of the trays 58a to 58g. It is preferable that the direction is . (In this case, a negative angle means an angle in the direction from the opening surface of the tray to the inside of the tray.) According to this angle, the stimulable phosphor sheet 22 can be attached to the bottom plate of the tray or already housed. This is because the sheet can be dropped and stored with minimal contact surface pressure. Furthermore, the tray 58a
Each of 58g to 58g may be provided with an opening at its upper end, and the stimulable phosphor sheet 22 may be introduced into the opening through this opening.

The sheet sorting and conveying device according to the present invention is basically constructed as described above, and its operation and effects will be explained next.

The cumulative fluorescence image information on which radiation image information has been accumulated and recorded is conveyed by the first belt conveyor 24, and is held between the nip roller 28 and the second belt conveyor 26 and conveyed in the sub-scanning direction. When starting, the laser light from the laser light source 16 is reflected by the galvanometer mirror 18 as shown by the dashed line, and the laser light scans the surface of the stimulable phosphor sheet 22 in the main scanning direction. In this case, for example, the size of the stimulable phosphor sheet 22 introduced into the reading section 10 is detected by a detection means (not shown) via a bar code attached to it in advance, and this detection signal is used as a primary By the way, as mentioned above, the stimulable phosphor sheet 22 is excited by the laser beam, and as a result, stimulated luminescence light is generated, which is transmitted through the light-guiding sheet 12 into the photo. After reaching the multiplier 14 and converting it into an electrical signal and amplifying it, it can be directly displayed as a visible image on a CRT or the like, or the image information can be stored in a magnetic recording device. The stimulable phosphor sheet 22 that has been completely processed is bent and conveyed vertically upward by the third belt conveyor 30, the roller group 32, and the fourth belt conveyor 34, and is then conveyed by the guide member 36 and the roller 3.
8 to the second guide member 40 and the fifth belt conveyor 4
It reaches between 4 and 4. At this time, since the sixth belt conveyor 48 and the seventh belt conveyor 50 are driven by a rotational drive source (not shown), the stimulable phosphor sheet 22
is once held between the sixth belt conveyor 48 and the seventh belt conveyor 50.

The stimulable phosphor sheet 22 is held in the sandwiched state as described above.
After being conveyed a predetermined distance, the sixth belt conveyor 48 and the seventh belt conveyor 50 start rotating in opposite directions, so that the stimulable phosphor sheet 22 is so-called switched back to the fifth heald conveyor 44. and introduced into a casing 46 constituting the erasing unit 42.

When the stimulable phosphor sheet 22 is introduced into the housing 46 in this manner, the radiation image information remaining on the stimulable phosphor sheet 22 is erased by the irradiation light from the erasing light sources 45a to 45d. That will happen.

When erasing is completed, the belt conveyor 44 is driven again. That is, the stimulable phosphor sheet 22 starts to be transported again in the direction of the second guide member 40 under the re-driving of the belt conveyor 44, and is sandwiched between the sixth belt conveyor 48 and the seventh belt conveyor 50 to convey the sheet. This leads to unit 52.

Therefore, the belt conveyor drive motor B3 is driven. That is, as described above, the driving force rotates the gear 76 via the chain 72, and the rotation of the gear 76 causes the gear 78 to rotate in a direction different from that of the gear 78.

As a result, since the rollers 568 and 54a rotate, the belt conveyor 54 and the belt conveyor 56 are displaced in opposite directions while slidingly contacting each other. That is,
The belt 64 of the belt conveyor 54 is displaced in the direction of arrow A, while the belt 66 forming the belt conveyor 56 is displaced in the direction of arrow B. To this end, the stimulable phosphor sheet 22 is first held between the belt 64 and the roller 68, and is further conveyed in the direction of the belt 66. The belts 64 and 66, which are in sliding contact with each other, transfer the stimulable phosphor sheet 22 transported in this way to the rollers 56a and 5.
4a to the intermediate position. Here, the driving of the motor 63 is temporarily stopped.

By the way, as described above, the reading unit 10 obtains the size information of the stimulable phosphor sheet to be transported in advance using a bar code or the like, and temporarily holds this information. Therefore, a signal related to this size is converted into a drive signal for the motor 61 and introduced. As a result, the motor 61 starts driving, and its rotational force reaches the chain 92 via the sprocket 90, and the chain 92 rotates the sprocket 88.

This causes the rollers 84a, 84b to rotate, and these rollers 84a, 84b to be attached to the angle member 94a194b.
The entire housing 62 is moved in the direction of arrow C by displacing the upper surface of the horizontal portion of the housing. During this time, the guide rollers 96a, 96b and 93a, 98b rotate in contact with the vertical portion of the angle member 94b, so that the housing 62 can be smoothly transferred.

For example, when the stimulable phosphor sheet 22 is at its maximum size, the rotation of the self-propelled motor 61 transports the housing 62 to the frontmost end and stops directly above the tray 58a. That is, the sheet discharge section defined by the belt 64 and the tip of the heald 66 is positioned so as to face the opening of the tray 58a.

Then, the belt drive motor 63 rotates again, and the stimulable phosphor sheet 2 sandwiched between the belt 64 and the belt 66
2 is accommodated inside the tray 58a from the sheet discharge section. Of course, if the size of the stimulable phosphor sheet 22 detected by the reading unit 10 is small, the self-propelled motor 61 stops the housing 62, for example, directly above the tray 58g, and the stimulable phosphor sheet 22 is detected by the reading unit 10. act to introduce the body sheet 22 into this tray 58g.

In this case, the trays 58a to 58g are arranged at an angle of θ=15″ to 45° with respect to the vertical axis, and the sheet discharging section defined by the belt 64, 66 The angle (α) between the direction and the opening surface of the tray 58 is set within the range of −5° to +15°. It is possible to reduce the contact surface pressure between the stacked sheets and other sheets stacked inside the tray 58, and the distance at which the stacked sheets rub against each other is shortened, preventing scratches from occurring on their surfaces. is prevented.

According to the present invention, as described above, various stimulable phosphor sheets are configured so that they can be sorted and conveyed to trays according to their size or type in order to keep them on standby for recording the next image information. There is.

Moreover, since the tray itself is arranged at an angle, it occupies a small area, so that the entire apparatus can be made compact.

Furthermore, since the sheet sorting and conveying device is configured to reliably transport horizontally to a predetermined position using a signal obtained from the reading unit, it is possible to accidentally combine different types of stimulable phosphor sheets into one. This can prevent the risk of being stored in the tray.

As can be easily understood from the above description, the present invention has a simple structure and can operate reliably, allowing accurate handling, and is economical since no labor is required. It is also possible to achieve the effect of achieving both practical and labor-saving effects.

Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to these embodiments.
For example, it is not limited to the stimulable phosphor sheet, but can also be used as a sorter for copying machines, etc. It goes without saying that various improvements and changes in design are possible without departing from the gist of the present invention. .

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram of a radiation image information reading device using a stimulable phosphor sheet in which a sheet sorting and conveying device according to the present invention is incorporated, and FIG. 2 shows a self-propelled portion of the sheet sorting and conveying device according to the present invention. FIG. 3 is a partially omitted perspective explanatory view showing a belt drive mechanism of a sheet sorting and conveying device according to the present invention, and FIG. 4 is a self-propelled mechanism and belt of a sheet sorting and conveying device according to the present invention. FIG. 5 is a perspective explanatory view showing the correlation with the conveying mechanism, FIG. 5 is a front explanatory view showing the arrangement state of the sheet sorting and conveying device according to the present invention and a plurality of trays arranged under it, and FIG. 6 is the present invention. FIG. 7 is an explanatory diagram showing the correlation between the inclination angle (θ°) of the tray and the sheet discharge angle (α°) of the tip roller of the conveyance unit throat. be. 10...Reading unit 12...Light guiding sheet 14...Photo multiplier 16...Laser light source 18...Galvanometer mirror 20...Optical surface plate 22...Storage phosphor sheet 24...First belt conveyor 26...Second belt conveyor 28...Nip roller 30...Third belt conveyor 32...Roller group 34...
・Fourth belt conveyor 36...First guide member 38...Roller 40...
Second guide member 42... Erasing unit 44 - Fifth belt conveyor 45a to 45d... Erasing light source 4 stones... Housing 48...
6th belt conveyor 50...7th belt conveyor 52...conveying unit 54...8th belt conveyor 56...9th belt conveyor 58...tray 60...
Sorting section 61...Self-propelled motor 62...Casing 63...Drive motor 64.66...Belt 68...Auxiliary roller 70...Sprocket 72...Chain 74...Sprocket 76.78...Gear 80 .82... Rotating shaft 84a, 84bs
86a186b...Roller 88.90...Sprocket 92...Chain 94a, 94b...Angle member τ 96a, 96b, 98a, 98b...Guide roller patent applicant Fuji Photo Film Co., Ltd.

Claims (7)

[Claims] (1) Consisting of a plurality of trays tilted at a predetermined angle with opening surfaces facing upward, and a sheet conveying unit disposed movably along a running path disposed above the trays, the sheet conveying unit The conveyance unit includes a belt conveyor held in a frame or a housing, and a rotational drive source that drives the belt conveyor, and transports the sheet conveyance unit with the sheet held on the belt conveyor to a predetermined tray. A sheet sorting and conveying device, characterized in that the belt conveyor is positioned and stopped above the tray, and then the belt conveyor is driven under the driving action of a rotary drive source so that the held sheets are dropped and stored inside the tray. (2) The sheet sorting and conveying device according to claim 1, wherein the tray is inclined at an angle of 15° or more and 45° or less with respect to the vertical axis. (3) In the apparatus according to claim 1 or 2, the sheet conveyance unit further includes a rotational drive source inside the frame or the housing, and a roller is attached to the rotational drive shaft of the rotational drive source. A sheet sorting and conveying device configured such that the rollers are connected to each other and the rollers are rotated along a travel path under the driving action of the rotational drive source to cause the sheet conveyance unit to travel by itself. (4) In the apparatus according to any one of claims 1 to 3, the belt conveyor is composed of at least one set of belt conveyors that are in sliding contact with each other, and the tip portion of the belt conveyor of the set of belt conveyors is A sheet sorting and conveying device configured to cause the sheet to fall and be stored inside the tray from a defined sheet discharge section. (5) In the apparatus according to claim 4, one roller constituting one belt conveyor of the set of belt conveyors and one roller constituting the other belt conveyor are connected to a sheet discharging section. gears that mesh with each other are fitted onto the rotational shafts of the respective rollers, and the rotational drive shaft of a rotational drive source is connected to the rotational shaft of the rollers, and the rotational drive source A sheet sorting and conveying device configured to rotate the two rollers in opposite directions through gears under the driving action of a power source, thereby causing the sheets to fall and discharge from a sheet discharge section of a set of belt conveyors onto a tray. . (6) In the device according to claim 4, the sheet ejecting direction from the sheet ejecting section further has an angle in the range of -5° or more and +15° or less with respect to the inclination angle of the tray. Sheet sorting and conveying device. (7) A sheet sorting and conveying device according to any one of claims 1 to 6, wherein the sheet is a stimulable phosphor sheet.