JP2005114639A - Bending/folding-back method of protective film, manufacturing method of stimulable phosphor panel, and stimulable phosphor pannel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bending/folding-back method of a protective film capable of reducing to the utmost a gap of a part covered by the protective film in order to manufacture a stimulable phosphor panel having a largely-secured image region, and preventing wrinkle generation, a manufacturing method of the stimulable phosphor panel, and the stimulable phosphor panel manufactured by the method. <P>SOLUTION: In this bending/folding-back method of an excessive part of the protective film stuck on the stimulable phosphor layer side of a stimulable phosphor sheet, the excessive part is attracted and held by an adsorption means, and after moving the adsorption means up to the end of the excessive part, the excessive part is bent by fulcruming the stimulable phosphor layer side end side, and the adsorption face of the adsorption means is moved so as to be in parallel with the back of the stimulable phosphor sheet, and the protective film is folded back by fulcruming the end side of a support. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a method for folding and folding an excess portion of a protective film of a stimulable phosphor sheet, a method for producing a stimulable phosphor sheet encapsulant, and a photostimulable phosphor sheet encapsulated by these methods About the body.

  Radiographic images such as X-ray images are often used for disease diagnosis and the like. In order to obtain this X-ray image, the photostimulable phosphor (fluorescent screen) was irradiated with X-rays that passed through the subject, and the resulting visible light was used in the same manner as when taking a normal photograph. So-called radiographs developed by irradiating a film are used. However, in recent years, a method has been devised in which an image is directly extracted from a photostimulable phosphor without using a film coated with a silver salt.

  As a method for extracting the image, the stimulable phosphor is accumulated by absorbing the radiation transmitted through the subject and then exciting the stimulable phosphor with light or heat energy. There is a method in which the radiation energy is emitted as fluorescence, and this fluorescence is detected and imaged. Specifically, for example, a stimulable phosphor sheet in which a stimulable phosphor layer is formed on a flexible support is used in, for example, US Pat. No. 3,859,527 and JP-A-55-12144. A radiographic image conversion method is described.

  In these methods, the stimulable phosphor layer of the stimulable phosphor sheet is irradiated with radiation transmitted through the subject to accumulate radiation energy corresponding to the radiation transmission density of each part of the subject, and then the stimulable phosphor By exciting the layer in time series with electromagnetic waves (excitation light) such as visible light and infrared light, the radiation energy accumulated in the stimulable phosphor layer is emitted as stimulated luminescence, and the intensity of this light For example, a signal obtained by the above method is photoelectrically converted to obtain an electric signal, and this signal is reproduced as a visible image on a recording material such as a photosensitive film or a display device such as a CRT.

  According to this radiographic image recording / reproducing method, a radiographic image with abundant information can be obtained with a much smaller exposure dose than in the case of radiographic method using a combination of conventional radiographic film and intensifying screen. There is an advantage that can be.

  Such a photostimulable phosphor is a photostimulable phosphor that exhibits stimulated luminescence when irradiated with excitation light after irradiation with radiation, but in practice, excitation light having a wavelength in the range of 400 to 900 nm. Generally, stimulable phosphors exhibiting stimulated emission in the wavelength range of 300 to 500 nm are generally used.

  As a stimulable phosphor sheet, a coating type in which a stimulable phosphor layer is coated on a flexible support is often used because it is easy to handle, easy to make, and stable in performance. Yes.

  In actual use, the photostimulable phosphor sheet is sealed with a protective film to protect the photostimulable phosphor layer, and a photostimulable phosphor sheet sealed body (hereinafter also simply referred to as a sealed body). The sealing body is fixed to a flat tray of a predetermined size with an adhesive member in a state where the sealing portion by the protective film does not protrude from the tray (generally referred to as a stimulable phosphor panel). Is housed in a cassette and loaded into the camera.

  Since the size of the tray is determined in advance, in order to increase the effective image area as much as possible, it is necessary to reduce the sealing portion of the stimulable phosphor sheet with the protective material. The width of the sealing part of the conventional product is 1 mm or more.

  In particular, when a photostimulable phosphor panel is used for mammography (mammography), it is necessary to prevent an image defect area from being generated as much as possible in the breast wall side breast image. It is necessary to make the image defect region (region where the photostimulable phosphor layer is not provided) as narrow as possible.

  For this reason, when producing a sealing body, the method of reducing the sealing part by a protective film has been examined. For example, a photostimulable phosphor sheet in which a photostimulable phosphor layer is formed on a flexible support is sandwiched between two sealing films (protective films) larger than the photostimulable phosphor sheet. A rigid member having a heater capable of pressing the photostimulable phosphor sheet with a sealing film (protective film) on the support side of the photostimulable phosphor sheet under reduced pressure, and the photostimulable phosphor There is known a method for producing a sealed body by sealing with a heat sealer having an elastic member capable of pressing the layer-side sealing film (for example, see Patent Document 1).

  However, when a sealing body is produced by the sealing method described in Patent Document 1, a sealing portion of a sealing film (protective film) is attached around the photostimulable phosphor sheet. When a sealing body is affixed to a tray to make a phosphor panel, an image defect region is generated by the width of the sealing portion. In particular, when this photostimulable phosphor panel is used for mammography (mammography), an image defect region is generated on the chest wall side, which may cause an image defect in the breast image on the chest wall side, which is not preferable.

  In addition, the transparent film is folded in half to form a bag-like film with both sides sealed and an opening. The stimulable phosphor sheet is inserted into the folded film, and the stimulable phosphor sheet is abutted against the folded portion, and deaerated. A method of manufacturing a photostimulable phosphor panel for mammography (mammography) is known in which a sealing body in which an opening is sealed is attached to a tray with a folded portion as a reference (for example, Patent Document 2). See).

  However, in the method described in Patent Document 2, the sealing region can be improved to 0.6 to 1.0 mm, but it is still in an insufficient state.

Under such circumstances, a stimulable phosphor panel that can secure a large image area is desired. Especially when a stimulable phosphor panel is used for mammography (mammography), a breast image on the chest wall side is used. Since it is necessary to prevent the image defect region from being generated as much as possible, the image defect region on the chest wall side (the region where the stimulable phosphor layer is not provided) is also used in the sealing body used for the stimulable phosphor panel. ) Is desired to be made as narrow as possible.
Japanese Patent Laid-Open No. 11-223890 JP 2001-83299 A

  The present invention has been made in view of the above situation, and its purpose is to make the gap between the portions covered by the protective film as much as possible in order to produce a photostimulable phosphor panel having a large image area. It is an object of the present invention is to provide a method for folding and turning back a protective film which is reduced and prevents wrinkles, a method for producing a photostimulable phosphor panel, and a photostimulable phosphor panel produced by these methods.

The above object of the present invention has been achieved by the following constitution.
(Claim 1)
A protective film having at least one side larger than the stimulable phosphor sheet is pasted on the stimulable phosphor layer side of the stimulable phosphor sheet in which the stimulable phosphor layer is formed on a flexible support. Attaching, folding at least one side of the surplus portion of the protective film along the end face of the photostimulable phosphor sheet, and folding and folding back the protective film on the back side of the photostimulable phosphor sheet.
Sucking and holding the excess portion of the photostimulable phosphor sheet side by suction means,
After moving the adsorption means in parallel with the surface of the photostimulable phosphor sheet, after moving to the end of the excess portion,
Using the adsorption means as a fulcrum on the side of the stimulable phosphor layer side of the end face of the stimulable phosphor sheet, the adsorbing means is in a downward direction so as to be parallel to the end face of the stimulable phosphor sheet. To bend the side of the protective film along the end face of the photostimulable phosphor sheet,
The adsorbing means is moved so that the adsorbing surface of the adsorbing means is parallel to the back surface of the stimulable phosphor sheet by using the edge of the support on the end face of the stimulable phosphor sheet as a fulcrum, and the protective film is folded back. A method for folding and folding back a protective film.
(Claim 2)
A protective film having at least one side larger than the stimulable phosphor sheet is pasted on the stimulable phosphor layer side of the stimulable phosphor sheet in which the stimulable phosphor layer is formed on a flexible support. Attaching, folding at least one side of the surplus portion of the protective film along the end face of the photostimulable phosphor sheet, and folding and folding back the protective film on the back side of the photostimulable phosphor sheet.
Sucking and holding the excess portion of the photostimulable phosphor sheet side by suction means,
The adsorbing means is placed so that the adsorbing surface of the adsorbing means is parallel to the end face of the stimulable phosphor sheet, with the end face of the stimulable phosphor sheet being the fulcrum of the end face of the stimulable phosphor sheet. While bending in the direction, after folding one side of the protective film along the end face of the stimulable phosphor sheet,
The adsorbing means is moved so that the adsorbing surface of the adsorbing means is parallel to the back surface of the stimulable phosphor sheet, with the edge of the support on the end face of the stimulable phosphor sheet as a fulcrum. A method for folding and folding a protective film, characterized by folding.
(Claim 3)
A protective film having at least one side larger than the stimulable phosphor sheet is pasted on the stimulable phosphor layer side of the stimulable phosphor sheet in which the stimulable phosphor layer is formed on a flexible support. Attaching, folding at least one side of the surplus portion of the protective film along the end face of the photostimulable phosphor sheet, and folding and folding back the protective film on the back side of the photostimulable phosphor sheet.
The center of the surplus portion near the stimulable phosphor sheet is sucked and held by two adsorbing means,
Each of the adsorption means moves in parallel with the surface of the photostimulable phosphor sheet toward two corners of the surplus portion, and after each of the adsorption means reaches each corner of the surplus portion,
Using each of the adsorption means as a fulcrum on the side of the stimulable phosphor layer side of the end face of the stimulable phosphor sheet, the adsorption surface of each adsorption means is parallel to the end face of the stimulable phosphor sheet. Move downward, bend one side of the protective film along the end face of the stimulable phosphor sheet,
The adsorbing means is moved so that the adsorbing surface of the adsorbing means is parallel to the back surface of the stimulable phosphor sheet by using the edge of the support on the end face of the stimulable phosphor sheet as a fulcrum, and the protective film is folded back. A method for folding and folding back a protective film.
(Claim 4)
A protective film having at least one side larger than the stimulable phosphor sheet is pasted on the stimulable phosphor layer side of the stimulable phosphor sheet in which the stimulable phosphor layer is formed on a flexible support. Attaching, folding at least one side of the surplus portion of the protective film along the end face of the photostimulable phosphor sheet, and folding and folding back the protective film on the back side of the photostimulable phosphor sheet.
The center of the excess portion from the photostimulable phosphor sheet is sucked and held by two adsorbing means,
With each of the adsorbing means as the fulcrum of the end face of the stimulable phosphor sheet, the adsorbing surface of the adsorbing means is parallel to the end face of the stimulable phosphor sheet. In addition, while moving downward toward the two corners of the excess part, after bending one side of the protective film along the end face of the stimulable phosphor sheet,
The adsorbing means is moved so that the adsorbing surface of the adsorbing means is parallel to the back surface of the stimulable phosphor sheet by using the edge of the support on the end face of the stimulable phosphor sheet as a fulcrum, and the protective film is folded back. A method for folding and folding back a protective film.
(Claim 5)
When the protective film is bent along the end surface of the photostimulable phosphor sheet with the end side of the stimulable phosphor layer as a fulcrum, the corner of the side of the side of the stimulable phosphor layer is crimped by a pressure-bonding means. The method for folding and folding back a protective film according to any one of claims 1 to 4, wherein folding and adhesion to the end face are performed.
(Claim 6)
When the protective film is bent along the back surface of the photostimulable phosphor sheet with the edge of the support on the end surface of the photostimulable phosphor sheet as a fulcrum, the corners of the edges of the support are folded by a pressure-bonding means. The method for folding and folding the protective film according to claim 1, wherein the photostimulable phosphor sheet is closely attached to the back surface.
(Claim 7)
The method of bending or folding back a protective film according to claim 5 or 6, wherein the pressure-bonding means is an elastic blade having a JIS-A rubber hardness of 10 to 70.
(Claim 8)
The method for folding and folding a protective film according to claim 5 or 6, wherein the pressure-bonding means is a rotating roller having a JIS-A rubber hardness of 5 to 40.
(Claim 9)
The rotating roller is used for corner folding of the end face of the stimulable phosphor sheet of the protective film on the side of the stimulable phosphor layer and closely contacting the end face, and a support for the end face of the stimulable phosphor sheet. 9. The protective film according to any one of claims 5 to 8, wherein an elastic blade is used for corner folding of the edges of the phosphor and adhesion to the back surface of the photostimulable phosphor sheet. Method.
(Claim 10)
A protective film having at least one side larger than the stimulable phosphor sheet is pasted on the stimulable phosphor layer side of the stimulable phosphor sheet in which the stimulable phosphor layer is formed on a flexible support. Attaching, folding at least one side of the surplus portion of the protective film along the end face of the photostimulable phosphor sheet, and folding and folding back the protective film on the back side of the photostimulable phosphor sheet.
While moving a plate-like elastic body having a JIS-A rubber hardness of 10 to 70 along the back surface from the end surface of the photostimulable phosphor sheet, the brightness of the end surface of the photostimulable phosphor sheet in the excess portion is increased. A method for folding and folding a protective film, comprising: corner folding of the side of the stimulable phosphor layer side, adhesion to the end surface, and adhesion to the back surface of the stimulable phosphor sheet.
(Claim 11)
A protective film having at least one side larger than the stimulable phosphor sheet is pasted on the stimulable phosphor layer side of the stimulable phosphor sheet in which the stimulable phosphor layer is formed on a flexible support. Attaching, folding at least one side of the surplus portion of the protective film along the end face of the photostimulable phosphor sheet, and folding and folding back the protective film on the back side of the photostimulable phosphor sheet.
While moving a rotating roller having a JIS-A rubber hardness of 5 to 40 along the end face of the photostimulable phosphor sheet, the stimulable phosphor layer on the end face of the stimulable phosphor sheet in the surplus portion Perform side folds and close contact with the end face,
While moving a plate-like elastic member having a JIS-A rubber hardness of 10 to 70 along the back surface of the photostimulable phosphor sheet, the surplus portion is folded and crimped to the back surface of the photostimulable phosphor sheet. A method for folding and folding back a protective film.
(Claim 12)
The method of bending or folding back a protective film according to any one of claims 1 to 11, wherein the surplus portion is provided with a taper so that the width becomes narrower toward an end portion.
(Claim 13)
A stimulable phosphor layer is formed on a band-shaped flexible support, and on the side of the stimulable phosphor layer of the band-shaped stimulable phosphor sheet that is continuously conveyed,
At least one side conveyed in the same direction as the band-shaped stimulable phosphor sheet is attached with a band-shaped protective film wider than the width of the photostimulable phosphor sheet,
At least one side of the surplus portion of the protective film is bent along at least one end face of the band-like stimulable phosphor sheet by a bending means, is crimped to the end face by a pressure-bonding means, and the band-like stimulable fluorescence is turned by a folding means. A method for folding and folding a protective film, characterized in that it is folded and pressure-bonded to the back surface of the body sheet.
(Claim 14)
The method for bending and folding back a protective film according to claim 13, wherein the folding means is a guide-like member having a JIS-A rubber hardness of 5 to 70.
(Claim 15)
The method of folding and folding back a protective film according to claim 13, wherein the pressure-bonding means is a guide-like member having a JIS-A rubber hardness of 5 to 70.
(Claim 16)
14. The protective film according to claim 13, wherein the folding means is a guide member having a rotating roller having a JIS-A rubber hardness of 5 to 40 and a JIS-A rubber hardness of 5 to 70. Method.
(Claim 17)
A protective film larger than the photostimulable phosphor sheet is attached to the photostimulable phosphor layer side of the photostimulable phosphor sheet in which the photostimulable phosphor layer is formed on a flexible support,
After leaving at least one side of the protective film, cutting the photostimulable phosphor sheet and the protective film into predetermined dimensions,
The one side is bent along the end face of the photostimulable phosphor sheet, crimped to the end face, and folded back to the back side of the stimulable phosphor sheet,
A tray is bonded to the support side of the photostimulable phosphor sheet,
Except for the end face covered with the protective film of the stimulable phosphor sheet, the periphery of the stimulable phosphor sheet is covered with resin coating,
A method for producing a photostimulable phosphor panel, wherein the photostimulable phosphor sheet is sealed between the protective film and the tray.
(Claim 18)
A protective film having a side larger than the photostimulable phosphor sheet on the photostimulable phosphor layer side of the photostimulable phosphor sheet in which the photostimulable phosphor layer is formed on a flexible support, After the three sides excluding the one side are attached to the three sides of the photostimulable phosphor sheet,
The one side is bent along the end face of the photostimulable phosphor sheet, crimped to the end face, and folded back to the back side of the stimulable phosphor sheet.
A tray is bonded to the support side of the photostimulable phosphor sheet,
Except for the end face covered with the protective film of the photostimulable phosphor sheet,
Covering the peripheral end surface of the photostimulable phosphor sheet with resin coating,
A method for producing a photostimulable phosphor panel, wherein the photostimulable phosphor sheet is sealed between the protective film and the tray.
(Claim 19)
A protective film having at least one side larger than the stimulable phosphor sheet is pasted on the stimulable phosphor layer side of the stimulable phosphor sheet in which the stimulable phosphor layer is formed on the flexible support. At least one side of the protective film is bent along the end face of the stimulable phosphor sheet, and a tray is attached to the support side of the stimulable phosphor sheet folded back to the back surface of the stimulable phosphor sheet. In the stimulable phosphor panel,
The protective film has a thickness of 1 to 60 μm, and has a gap of 0.05 to 0.5 mm between the protective film and the end face of the stimulable phosphor sheet,
A photostimulable phosphor panel, wherein the periphery of the photostimulable phosphor sheet is covered with a resin coating except for an end face covered with the protective film.

  In order to produce a photostimulable phosphor panel having a large image area, a method for folding and folding the protective film that reduces the gap between the portions covered by the protective film as much as possible and prevents wrinkles, The manufacturing method of the stimulable phosphor panel and the stimulable phosphor panel produced by these methods can be provided and can be used with confidence for mammography (mammography).

  Embodiments according to the present invention will be described with reference to FIGS. 1 to 10, but the present invention is not limited thereto.

  FIG. 1 is a schematic perspective view of a bending / folding device for a surplus portion of a protective film on a photostimulable phosphor sheet having an adsorbing means.

  In the drawing, reference numeral 1a denotes a bending / folding device for the surplus portion 301 of the protective film 3 adhered on the photostimulable phosphor sheet 2. The folding / folding device 1a includes a suction table 101, a folding / folding unit 102, and a mounting table 4 on which the photostimulable phosphor sheet 2 with the protective film 3 attached is placed on a base 5. have.

  The suction unit 101 moves up and down the auxiliary plate 101a, the cylinder 101b that moves the auxiliary plate 101a up and down (in the direction of the arrow in the figure), and the suction head 101c that sucks up the surplus portion 301 of the protective film 3 (in the direction of the arrow in the figure). ), A cylinder 101d, a motor 101e for moving the suction head 101c parallel to the protective film 3 (in the direction of the arrow in the figure), and a base 101g provided with a moving hole 101f.

  The folding / folding unit 102 includes a motor 102a that rotates the base 101g via the rotary shaft 102b (in the direction of the arrow in the drawing), holding members 102c and 102d that hold the base 101g, and a gear box 102e of the motor 102a. doing. A method of folding and folding the surplus portion 301 of the protective film 3 using the folding / folding apparatus 1a will be described with reference to FIG.

  FIG. 2 is a schematic diagram showing a flow of a method for folding / folding the surplus portion of the protective film on the photostimulable phosphor sheet using the folding / folding apparatus shown in FIG. FIG. 2A is a schematic diagram showing a flow of a method of folding and returning the suction head after moving the suction head to the tip of the surplus portion of the protective film. FIG. 2B is a schematic diagram illustrating a flow of a method of folding and folding the suction head while moving the suction head to the tip of the surplus portion of the protective film.

  In the figure, 201 indicates the end face of the stimulable phosphor sheet 2, 202 indicates the stimulable phosphor layer, 203 indicates the support, and 204 indicates the back surface of the stimulable phosphor sheet 2 (flexibility). The back surface of the support of FIG. Note that the gantry, the bending / folding portion, and the mounting table are omitted. Other reference numerals are the same as those in FIG.

  A method for folding and folding shown in FIG.

  In S1, the photostimulable phosphor sheet 2 having the protective film 3 attached to the mounting table is placed. At this stage, the auxiliary plate 101a is lowered to the standby position by the cylinder 101b. The suction head 101c is raised to the standby position by the cylinder 101d.

  In S2, the auxiliary plate 101a is raised by the cylinder 101b, the suction head 101c is lowered by the cylinder 101d, and the excess portion 301 of the protective film 3 near the photostimulable phosphor sheet 2 is sucked and held by the suction head 101c. Thereafter, the suction head 101c is moved in parallel with the protective film 3 along the movement hole 101f (see FIG. 1) by the motor 101e (see FIG. 1) while the surplus portion 301 is sucked and held (in the drawing). And move to the tip of the surplus portion 301.

  In S3, the auxiliary plate 101a is lowered to the standby position by the cylinder 101b. Thereafter, the gantry 101g (see FIG. 1) is set so that the suction surface of the suction head 101c is parallel to the end surface 201 of the photostimulable phosphor sheet 2 with the end on the side of the photostimulable phosphor layer 201 as a fulcrum. The motor 102a (see FIG. 1) is rotated downward (in the direction of the arrow in the figure) via the rotating shaft 102b (see FIG. 1). Thereby, the surplus part 301 is bent along the end surface 201 of the photostimulable phosphor sheet 2.

  In S4, the gantry 101g has the suction head 101c as the fulcrum of the support 203 of the stimulable phosphor sheet 2 and the suction surface of the suction head 101c is parallel to the back surface 204 of the stimulable phosphor sheet 2. (See FIG. 1) is rotated (in the direction of the arrow in the figure) by a motor 102a (see FIG. 1) via a rotating shaft 102b (see FIG. 1).

  In S5, by moving the suction head 101c, the surplus portion 301 is bent and folded around the end side of the support 203 of the photostimulable phosphor sheet 2 as a fulcrum.

  In S6, the suction surface of the suction head 101c is parallel to the back surface 204 of the photostimulable phosphor sheet 2, and the folding / folding of the surplus portion 301 is completed. By folding in such a way, generation of wrinkles in the surplus portion 301 can be prevented, and the flatness of the photostimulable phosphor sheet 2 can be maintained even when the photostimulable phosphor panel is manufactured. . The suction head 101c is returned to the state of S1 when the folding / folding is completed. The production of the photostimulable phosphor panel will be described with reference to FIGS.

  A method for folding and folding shown in FIG. 2B will be described.

  In S1, the photostimulable phosphor sheet 2 having the protective film 3 attached to the mounting table is placed. At this stage, the auxiliary plate 101a is lowered to the standby position by the cylinder 101b. The suction head 101c is raised to the standby position by the cylinder 101d.

  In S2, the auxiliary plate 101a is raised by the cylinder 101b, the suction head 101c is lowered by the cylinder 101d, and the excess portion 301 of the protective film 3 near the photostimulable phosphor sheet 2 is sucked and held by the suction head 101c.

In S3, the auxiliary plate 101a is lowered to the standby position by the cylinder 101b. The suction head 101c is moved in parallel with the protective film 3 along the movement hole 101f (see FIG. 1) by the motor 101e (see FIG. 1) while the excess portion 301 is sucked and held (in the direction of the arrow in the figure). Accordingly, the frame 101g (see FIG. 1) is used so that the adsorption surface of the adsorption head 101c is parallel to the end surface 201 of the stimulable phosphor sheet 2 with the edge on the side of the stimulable phosphor layer 201 as a fulcrum. ) Begins to rotate downward (in the direction of the arrow in the figure) via the rotating shaft 102b (see FIG. 1) by the motor 102a (see FIG. 1).
Thereby, the surplus portion 301 starts to be bent along the end surface 201 of the photostimulable phosphor sheet 2.

  In S4, the movement of the suction head 101c to the excessive portion 301 of the photostimulable phosphor sheet 2 and the downward rotational movement (in the direction of the arrow in the figure) are continued.

  In S5, the gantry 101g (see FIG. 1) is rotated by the motor 102a (see FIG. 1) and the rotating shaft 102b (see FIG. 1) so that the suction surface of the suction head 101c is parallel to the end surface 201 of the photostimulable phosphor sheet 2. (See the arrow direction in the figure). Thereby, the surplus part 301 is bent along the end surface 201 of the photostimulable phosphor sheet 2.

  In S6, the gantry 101g (with the adsorption head 101c being parallel to the back surface 204 of the photostimulable phosphor sheet 2 with the adsorption head 101c as the fulcrum at the edge of the support 203 of the photostimulable phosphor sheet 2 as a fulcrum. 1 is rotated by a motor 102a (see FIG. 1) via a rotating shaft 102b (see FIG. 1) (in the direction of the arrow in the figure).

  In S7, by moving the suction head 101c, the surplus portion 301 is bent and folded around the edge of the support 203 of the photostimulable phosphor sheet 2, and the suction surface of the suction head 101c is stimulated fluorescently. It becomes parallel to the back surface 204 of the body sheet 2 and the bending / folding of the surplus portion 301 is completed. By folding in such a way, generation of wrinkles in the surplus portion 301 can be prevented, and the flatness of the photostimulable phosphor sheet 2 can be maintained even when the photostimulable phosphor panel is manufactured. . The suction head 101c is returned to the state of S1 when the folding / folding is completed. The production of the photostimulable phosphor panel will be described with reference to FIGS.

  Using the folding / folding apparatus shown in FIG. 1, the protective film is folded / folded with the flow shown in FIG. 2 so that the protective film can be folded / folded on the end face of the photostimulable phosphor sheet with high accuracy. A photostimulable phosphor panel in which the image defect region on the side of the chest wall (the region where the photostimulable phosphor layer is not provided) is narrow and the planarity of the photostimulable phosphor sheet 2 is good is manufactured. It has become possible.

  FIG. 3 is a schematic perspective view of another example of a bending / folding device for a surplus portion of the protective film on the photostimulable phosphor sheet having the adsorbing means.

  In the figure, reference numeral 1b denotes a bending / folding device for the surplus portion 301 of the protective film 3 adhered on the photostimulable phosphor sheet 2. The bending / folding device 1b includes a cylinder 101d that moves the suction head 101c that sucks the surplus portion 301 of the protective film 3 up and down (in the direction of the arrow in the figure), and moves the suction head 101c in parallel with the protective film 3 (in the figure). There are two motors 101e (in the direction of the arrow). Reference numerals 301 a and 301 b denote corners at both ends of the tip of the surplus portion 301.

  101e1 indicates an arm that moves the suction head 101c to the end point of the surplus portion of the protective film 3 in parallel with the protective film 3 (in the direction of the arrow in the figure), and 101e2 indicates a hole for movement. The same mechanism is attached to other motors. Other reference numerals are the same as those in FIG.

  The folding / folding method of the surplus portion 301 of the protective film 3 using the folding / folding device 1b includes the flow of folding / folding using the folding / folding device 1a shown in FIG. 2 and the movement of the two suction heads shown below. Since it is the same except for it, detailed description is abbreviate | omitted.

In the case of the bending / folding device 1b, there are two suction heads, and the two suction heads suck and hold the center of the surplus portion near the stimulable phosphor sheet. Subsequent movements of the suction head are the same as the steps shown in FIGS.
The folding / folding device 1b shown in FIG. 2 has two suction heads and moves toward the corners at both ends of the surplus portion, so that the surplus portion is stretched compared to the folding / folding device 1a shown in FIG. It is possible to produce a photostimulable phosphor panel with a narrower image defect area (area where no stimulable phosphor layer is provided) on the chest wall side. It became.

  FIG. 4 is a schematic perspective view of a bending / folding device for a surplus portion of the protective film on the photostimulable phosphor sheet having a pressure bonding means. FIG. 4A is a schematic perspective view of a folding / folding device for a surplus portion of the protective film on the photostimulable phosphor sheet showing a state before the crimping means is operated. FIG. 4B is a schematic perspective view of a folding / folding device for a surplus portion of the protective film on the photostimulable phosphor sheet showing a state in which the crimping means is operating.

  In the figure, reference numeral 1c denotes a bending / folding device for the surplus portion 301 of the protective film 3 adhered on the photostimulable phosphor sheet 2. Reference numeral 6 denotes a crimping means, and the crimping means 6 includes a blade 604 attached to a base 603 and a cylinder 601 that moves the blade 604 via a cylinder shaft 602 of the blade 604. Other reference numerals are the same as those in FIG. This figure shows the case where the pressure-bonding means is disposed in the protective film folding / folding apparatus shown in FIG. 1, but the pressure-bonding means may be disposed in the protective film folding / folding apparatus shown in FIG.

  The blade 604 has a JIS-A rubber hardness of 10 to 70. If it is less than 10, it may be soft and may not be turned back reliably depending on the thickness of the blade. If it exceeds 70, it becomes too hard and may be damaged depending on the state of the photostimulable phosphor.

  Examples of the material used for the blade 604 include polyurethane (ether type, ester type), rubber (NBR, silicon rubber, NR, etc.) and the like. The shape of the blade 604 is preferably 1 to 5 mm in thickness and 100 to 120% in length and 10 to 40 mm in height with respect to the width of the photostimulable phosphor sheet.

  Although this figure shows the case where a blade is used for the pressure-bonding means 6, a rotating roller having a JIS-A rubber hardness of 5 to 40 may be used. When the JIS-A rubber hardness is less than 5, depending on the type of photostimulable phosphor sheet, it may become too soft and may be pressed by the shaft core. When it exceeds 40, it may become too hard and contact with a photostimulable phosphor sheet may become uneven.

  Examples of the material used for the rotating roller include NBR, silicon rubber, and NR. The shape of the rotating roller is preferably 5 to 30 mm in diameter and 100 to 120% in length with respect to the width of the photostimulable phosphor sheet.

  The surplus portion 301 of the protective film 3 is folded and folded along the end face of the stimulable phosphor sheet 2 by the adsorption portion 101 and the folding / folding portion 102, and then the stimulable phosphor sheet 2 is pressed by the pressure bonding means 6. By crimping the end surface 201 and the surplus portion 301, the gap can be made as narrow as possible. By crimping the surplus portion 301 on the back surface 204 of the stimulable phosphor sheet 2, Generation and generation of voids can be prevented.

  A method for folding and folding the surplus portion 301 of the protective film 3 using the crimping means 6 will be described with reference to FIG.

  FIG. 5 is a schematic diagram showing a flow of a folding / folding method of the surplus portion of the protective film on the photostimulable phosphor sheet using the folding / folding apparatus shown in FIG.

  Reference numerals in the figure are synonymous with those in FIGS.

  In S1, the photostimulable phosphor sheet 2 having the protective film 3 attached to the mounting table is placed. At this stage, the auxiliary plate 101a is lowered to the standby position by the cylinder 101b. The suction head 101c is raised to the standby position by the cylinder 101d. The crimping means 6 is waiting at the standby position.

  In S2, the auxiliary plate 101a is raised by the cylinder 101b, the suction head 101c is lowered by the cylinder 101d, and the excess portion 301 of the protective film 3 near the photostimulable phosphor sheet 2 is sucked and held by the suction head 101c. Thereafter, the suction head 101c is moved in parallel with the protective film 3 along the movement hole 101f (see FIG. 1) by the motor 101e (see FIG. 1) while the surplus portion 301 is sucked and held (in the drawing). And move to the tip of the surplus portion 301.

  In S3, the auxiliary plate 101a is lowered to the standby position by the cylinder 101b. Thereafter, the gantry 101g (see FIG. 1) is set so that the suction surface of the suction head 101c is parallel to the end surface 201 of the photostimulable phosphor sheet 2 with the end on the side of the photostimulable phosphor layer 201 as a fulcrum. The motor 102a (see FIG. 1) is rotated downward (in the direction of the arrow in the figure) via the rotating shaft 102b (see FIG. 1). Thereby, the surplus portion 301 is bent along the end surface 201 with the end side of the stimulable phosphor sheet 2 on the side of the stimulable phosphor layer 201 as a fulcrum.

  In S4, the gantry 101g has the suction head 101c as the fulcrum of the support 203 of the stimulable phosphor sheet 2 and the suction surface of the suction head 101c is parallel to the back surface 204 of the stimulable phosphor sheet 2. (See FIG. 1) is rotated (in the direction of the arrow in the figure) by a motor 102a (see FIG. 1) via a rotating shaft 102b (see FIG. 1). The movement is performed until the blade 604 of the crimping means 6 comes into contact with the end face 201 of the photostimulable phosphor sheet 2.

  In S5, by moving the suction head 101c, the surplus portion 301 is bent and folded around the end side of the support 203 of the photostimulable phosphor sheet 2 as a fulcrum.

  In S6, the suction surface of the suction head 101c is parallel to the back surface 204 of the photostimulable phosphor sheet 2, and the folding / folding of the surplus portion 301 is completed.

  In S7, the stimulable phosphor sheet is further pushed from the end of the end face 201 of the stimulable phosphor sheet 2 on the side of the stimulable phosphor layer 202 by the blade 604 being further pushed by the cylinder (in the direction of the arrow in the figure). 2 is crimped to the end side of the support 203, so that the excess portion 301 of the protective film 3 on the end side on the side of the stimulable phosphor layer 201 is squared and the end face 201 of the stimulable phosphor sheet 2 is exposed. It becomes possible to make the gap of the surplus portion 301 as narrow as possible.

  In S8, the blade 604 is further pushed to the position where it contacts the suction head 101c by the cylinder. Thereby, the cornering of the surplus portion 301 of the protective film 3 at the edge of the support 203 of the stimulable phosphor sheet 2 and the adhesion of the surplus portion 301 on the back surface 204 of the stimulable phosphor sheet 2 are performed, The bending / folding of the surplus portion 301 ends. By folding back in this way, generation of wrinkles in the surplus portion 301 can be prevented, and the flatness of the photostimulable phosphor sheet 2 can be maintained even when the photostimulable phosphor panel is manufactured. . By folding in such a way, generation of wrinkles in the surplus portion 301 can be prevented, and the flatness of the photostimulable phosphor sheet 2 can be maintained even when the photostimulable phosphor panel is manufactured. . When the folding / folding is completed, the suction head 101c and the pressure bonding means 6 are returned to the state of S1. The production of the photostimulable phosphor panel will be described with reference to FIGS.

  By using the folding / folding apparatus shown in FIG. 4 to fold / fold the protective film according to the flow shown in FIG. 5, the folding / folding of the protective film onto the end face of the photostimulable phosphor sheet is performed. Is performed with higher accuracy than the folding / folding apparatus shown in FIG. 1, the image defect area (area where the stimulable phosphor layer is not provided) on the chest wall side is narrow, and the planarity of the stimulable phosphor sheet 2 However, it was possible to produce a photostimulable phosphor panel.

  FIG. 6 is a schematic perspective view of a folding / folding device for a surplus portion of the protective film on the photostimulable phosphor sheet using a plate-like elastic body.

  In the figure, 1d indicates a bending / folding device for the surplus portion 301 of the protective film 3 adhered on the photostimulable phosphor sheet 2. The folding / folding device 1d has a folding / folding portion 7 disposed on the base 5 and a mounting table 4 on which the photostimulable phosphor sheet 2 with the protective film 3 attached is placed. .

The folding / folding unit 7 includes a base 702 to which a plate-like elastic body 701 is attached;
Support members 704a and 704b that support the gantry 702 via a rotation shaft 703 so that the gantry 702 can be rotated (in the direction of the arrow in the figure), and a drive unit 705 that rotates the gantry 702 (in the direction of the arrow). The drive unit 705 includes a motor 705a, a gear box 705b, and a mounting base 705c.

  The plate-like elastic body 701 has a JIS-A rubber hardness of 10 to 70. If it is less than 10, it will be too soft, and depending on the type of protective film, it will not be possible to reliably turn it back. If it exceeds 70, it becomes too hard and there is a risk of damaging the photostimulable phosphor sheet, which is not preferable.

  In this figure, the case where the plate-like elastic body 701 is used for all the folding and folding of the surplus portion 301 of the protective film 3 is shown, but the stimulable fluorescence of the end face of the stimulable phosphor sheet of the surplus portion 301 is shown. Using a rotating roller having a JIS-A rubber hardness of 5 to 40 for corner folding of the side edge on the body layer side and adhesion to the end face, the back face end of the stimulable phosphor sheet is the end face of the stimulable phosphor sheet. It is also possible to use a plate-like elastic body 701 having a JIS-A rubber hardness of 10 to 70 for corner folding and adhesion to the back surface. When the JIS-A rubber hardness of the rotating roller is less than 10, it becomes too soft, the rotating roller is not sufficiently rotated, and depending on the type of the protective film, the adherence to the back surface of the photostimulable phosphor sheet is insufficient. Therefore, it is not preferable. If it exceeds 70, it will be too hard and contact will not be uniform, and depending on the type of protective film, adhesion to the back side of the photostimulable phosphor sheet will be insufficient, such being undesirable.

  A method of folding and folding the surplus portion 301 of the protective film 3 using the folding / folding device 1d will be described with reference to FIG.

  FIG. 7 is a schematic diagram showing a flow of a folding / folding method of the surplus portion of the protective film on the photostimulable phosphor sheet using the folding / folding apparatus shown in FIG. Note that the gantry, the mounting table, and the drive unit are omitted. Other reference numerals are the same as those in FIGS.

  In S <b> 1, the stimulable phosphor sheet 2 having the protective film 3 having the surplus portion 301 on the stimulable phosphor layer side is attached to the plate-like elastic body 701 near the stimulable phosphor sheet of the surplus portion 301. Is set on the mounting table so as to be crimped. After setting, the stand is rotated by the drive unit (in the direction of the arrow in the figure).

  In S <b> 2, the protective film 3 is protected from the end of the stimulable phosphor layer side 202 of the end face 201 of the stimulable phosphor sheet 2 by the plate-like elastic body 701 attached to the mount 702 as the mount 702 rotates. The surplus portion 301 is bent and angle-folded.

  In S <b> 3, the plate-like elastic body 701 moves along the end surface 201 of the photostimulable phosphor sheet 2 by further rotating the gantry 702. As the plate-like elastic body 701 moves, the surplus portion 301 of the protective film 3 is brought into close contact with the end surface 201 of the photostimulable phosphor sheet 2. It is possible to narrow the gap between the end face 201 and the surplus portion 301 as much as possible by performing close contact in this way.

  In S <b> 4, the rotation of the gantry 702 further proceeds, whereby the surplus portion 301 of the protective film 3 is bent from the end of the stimulable phosphor sheet 2 on the support 203 side by the plate-like elastic body 701, and the corner fold is performed. .

  In S5, as the rotation of the gantry 702 further proceeds, the surplus portion 301 of the protective film 3 is folded back to the back surface 204 of the stimulable phosphor sheet 2 by the plate-like elastic body 701, and at the same time, the close contact is performed. The folding / folding of the surplus portion 301 of the protective film 3 is completed. By folding in such a way, generation of wrinkles in the surplus portion 301 can be prevented, and the flatness of the photostimulable phosphor sheet 2 can be maintained even when the photostimulable phosphor panel is manufactured. . When the folding / folding is completed, the plate-like elastic body 701 is returned to the state of S1. The production of the photostimulable phosphor panel will be described with reference to FIGS.

  By using the folding / folding apparatus shown in FIG. 6, the protective film is folded / folded according to the flow shown in FIG. 7, thereby folding the protective film to the end face of the photostimulable phosphor sheet. Is performed with high accuracy in the same manner as the folding / folding apparatus shown in FIG. 1, and the image defect area on the chest wall side (area where the stimulable phosphor layer is not provided) is narrow and the planarity of the stimulable phosphor sheet 2 is However, it was possible to produce a photostimulable phosphor panel.

  FIG. 8 is a schematic view of an apparatus for sticking a protective film on a belt-like photostimulable phosphor sheet that is continuously conveyed, and bending and folding the surplus portion. (A) of FIG. 8 is a schematic perspective view of an apparatus in which a band-shaped protective film is continuously stuck on a band-shaped photostimulable phosphor sheet that is continuously conveyed, and an excess portion is continuously bent and folded. FIG. 8B is an enlarged schematic perspective view of a portion indicated by P in FIG. FIG. 8C is a schematic cross-sectional view along AA ′ of FIG. FIG. 8D is a schematic cross-sectional view taken along the line BB ′ of FIG. FIG. 8E is a schematic cross-sectional view along CC ′ of FIG.

  In the figure, 1e indicates that a strip-shaped protective film 802 is continuously stuck on the photostimulable phosphor layer 901 of the strip-shaped photostimulable phosphor sheet 9 that is continuously conveyed, and an excess portion 803 of the protective film 802 is attached. An apparatus for continuously folding and folding back along the end surface 901 of the band-like stimulable phosphor sheet 9 is shown. Reference numeral 8 denotes a roll-shaped protective film wound around the winding core 801. Reference numeral 10 denotes a pressing roll for continuously sticking the band-shaped protective film 802 on the photostimulable phosphor layer 902 of the band-shaped stimulable phosphor sheet 9.

  The band-shaped protective film 802 shown in this figure is stuck on the photostimulable phosphor layer 902 of the band-shaped stimulable phosphor sheet 9 with an excess portion on one side of the band-shaped stimulable phosphor sheet 9. It has become like that.

  Reference numeral 11 denotes a guide member of a bending means for bending the surplus portion 803 along the end surface 901 of the strip-shaped stimulable phosphor sheet 9 with the end side of the stimulable phosphor layer 902 as a fulcrum. The guide member preferably has a JIS-A rubber hardness of 10 to 70. When it is less than 10, it becomes too soft, and depending on the type of the protective film, bending may not be performed reliably. If it exceeds 70, it may become too hard to follow the shape of the bent portion.

  Reference numeral 12 denotes a guide-like member of a crimping means for crimping the bent surplus portion 803 to the end surface 901. The guide member of the guide member 12 preferably has a JIS-A rubber hardness of 10 to 70. If it is less than 10, it will be too soft, and depending on the type of the protective film, the pressure bonding may be uncertain. If it exceeds 70, the band-like photostimulable phosphor sheet may be damaged too much.

  Reference numeral 13 denotes a guide-like member of folding means that folds the surplus portion 803 bonded to the end surface 901 onto the back surface 904 of the support 903 of the band-like stimulable phosphor sheet 9. The guide-like member 13 preferably has a rotating roller and an elastic member. JIS-A rubber hardness of the rotating roller is preferably 5 to 40, and if it is less than 5, it becomes too soft, it becomes resistance to rotation and cannot be reliably rotated, and depending on the type of protective film, folding may be insufficient. . When it exceeds 40, it will become too hard and contact with a protective film will become non-uniform | heterogenous, and folding may become inadequate depending on the kind of protective film.

  The elastic member preferably has a JIS-A rubber hardness of 10 to 70, and if it is less than 10, the elastic member is too soft and the folding may be insufficient depending on the type of the protective film. When it exceeds 70, it may become too hard and may damage a strip-like photostimulable phosphor sheet.

  An outline of a method of folding along the end face of the belt-like stimulable phosphor sheet 9 using the apparatus for folding and folding the surplus portion of the protective film shown in this figure and then folding back to the back will be explained step by step.

  In S1, the band-shaped protective phosphor sheet 802 having one side wider than the width of the photostimulable phosphor sheet is aligned with the band-shaped stimulable phosphor sheet 9 to be continuously transported at the same transport speed. It is supplied onto the photostimulable phosphor layer 902.

  In S <b> 2, the protective film 802 is stuck on the photostimulable phosphor layer 902 by the pressing roll 10.

  In S3, the surplus portion 803 of the protective film 802 is bent by the guide-like member 11 of the bending means with the end side of the stimulable phosphor layer 902 as a fulcrum.

  In S4, the bent surplus portion 803 is pressure-bonded to the end surface 901 of the band-like stimulable phosphor sheet 9 by the guide-shaped member 12 of the pressure-bonding means.

  In S5, the surplus portion 803 crimped to the end surface 901 is folded back and crimped to the back surface 904 of the support 903 of the belt-like stimulable phosphor sheet 9 by a guide-like member of the folding means, so The folding / turning back to the end face of the photostimulable phosphor sheet 9 is completed.

  By using the folding / folding apparatus shown in FIG. 8 to continuously fold / fold the protective film on the end face of the photostimulable phosphor sheet, it is possible to increase production efficiency and at the same time The protective film is folded and folded on the end face of the stimulable phosphor sheet with high accuracy in the same manner as the folding and folding apparatus shown in FIG. 1, and an image defect region (stimulable phosphor layer is provided on the chest wall side). It has become possible to produce a photostimulable phosphor panel with a narrowed area.

  FIG. 9 is a schematic diagram showing a flow of an example of a method for producing a photostimulable phosphor panel.

  In S1, the protective film 3 larger than the photostimulable phosphor sheet 2 and the photostimulable phosphor sheet 2 are prepared.

  In S2, the protective film 3 is stuck to the photostimulable phosphor layer 2 side of the photostimulable phosphor sheet 2.

  In S <b> 3, the protective film 3 is cut according to the size of the photostimulable phosphor sheet 2, leaving one side.

  In S4, the surplus portion 301 of the protective film 3 is bent along the end surface 201 of the photostimulable phosphor sheet 2, folded back to the back surface, and the photostimulable phosphor layer and one end surface are covered with the protective film 3. A photostimulable phosphor sheet is completed. A tray 14 to which the photostimulable phosphor sheet covered with the protective film 3 is attached is prepared. It should be noted that any one of the folding / folding apparatus and the folding / folding method shown in FIGS. 1 to 7 can be applied to bend / fold the surplus portion 301.

  In S <b> 5, the end face of the photostimulable phosphor sheet covered with the protective film 3 is aligned with the end face of the tray 14 and is pasted on the tray 14.

  In S <b> 6, the resin 16 is applied by the coating machine 15 on the three sides of the photostimulable phosphor sheet covered with the protective film 3 on the tray 14.

  In S7, the stimulable phosphor sheet is coated between the protective film and the tray by coating three sides of the stimulable phosphor sheet covered with the protective film 3 on the tray 14 with the resin 16. The photostimulable phosphor panel 17 in which the photostimulable phosphor sheet is sealed is completed.

  FIG. 10 is a schematic diagram showing a flow of another example of a method for producing a photostimulable phosphor panel.

  In S <b> 1, a protective film 3 having one side larger than the photostimulable phosphor sheet 2 and the photostimulable phosphor sheet 2 are prepared.

  In S <b> 2, the three sides of the stimulable phosphor sheet 2 and the three sides of the protective film 3 are bonded together on the stimulable phosphor layer of the stimulable phosphor sheet 2.

  The subsequent steps S3 to S6 are the same as the steps S4 to S7 shown in FIG.

  By producing a photostimulable phosphor panel according to the flow shown in FIGS. 9 and 10, the gap between the surplus portion 301 of the protective film 3 and the end surface 201 of the photostimulable phosphor sheet 2 is narrow, and photostimulable fluorescence is produced. The body sheet 2 has good flatness, and the effective image area is increased as much as possible for mammography (mammography), and the image defect area on the side of the chest wall (area without the stimulable phosphor layer) is narrowed. It became possible to fabricate a fluorescent phosphor panel.

  The gap between the surplus portion 301 of the protective film 3 and the end face 201 of the photostimulable phosphor sheet 2 is 0.05 to 0.5 μm. If it is less than 0.05 μm, it is not preferable because the effect of increasing the effective image area is small for the time required for production. When the thickness exceeds 0.5 μm, the effective image area decreases and the image defect area on the chest wall side increases, which is not preferable.

  The thickness of the protective film according to the present invention is 1 to 60 μm. If it is less than 1 μm, the strength is insufficient and the moisture-proof property is insufficient. If it exceeds 60 μm, the captured image quality is deteriorated, which is not preferable. The shape of the surplus portion of the protective film according to the present invention is preferably provided with a taper in order to reduce the waste of material as much as possible.

  In the actual use, the photostimulable phosphor panel according to the present invention is housed in a cassette and loaded into a photographing apparatus.

  As a protective film according to the present invention, in order to protect the photostimulable phosphor layer of the photostimulable phosphor sheet from humidity and to extract an image of a subject from the photostimulable phosphor layer, JP-A-6-95302 A transparent laminated material including at least one inorganic vapor deposition layer is more preferably used from the viewpoint of moisture resistance.

These inorganic vapor deposition films include thin film handbooks p879-p901 (Japan Society for the Promotion of Science), vacuum technology handbooks p502-p509, p612, p810 (Nikkan Kogyo Shimbun), vacuum handbook revised editions p132-p134 (ULVAC Nippon Vacuum Technology K.K. Examples thereof include inorganic films as described in K). For example, Cr ₂ O ₃ , Si _x O _y (x = 1, y = 1.5 to 2.0), Ta ₂ O ₃ , ZrN, SiC, TiC, PSG, Si ₃ N ₄ , single crystal Si, amorphous Si, W, AI ₂ O ₃ or the like is used.

  The thermoplastic resin film used as the base material on which the inorganic vapor deposition layer is provided includes ethylene tetrafluoroethyl copolymer (ETFE), high density polyethylene (HDPE), stretched polypropylene (0PP), polystyrene (PS), polymethyl methacrylate (PMMA). ), Stretched nylon (ONy), polyethylene terephthalate (PET), polycarbonate (PC), polyimide, polyether styrene (PES), and other film materials used for general packaging films can be used.

  As a thermoplastic resin film laminated via an inorganic vapor deposited film sheet, a polymer film used as a general packaging material (for example, a polymer film described in Toray Research Center, Inc., a new development of functional packaging materials) is used. Density polyethylene (LDPE), HDPE, linear low density polyethylene (LLDPE), medium density polyethylene, unstretched polypropylene (CPP), OPP, ONy, PET, cellophane, polyvinyl alcohol (PVA), stretched vinylon (OV), ethylene- Vinyl acetate copolymer (EVOH), vinylidene chloride (PVDC), etc. can be used.

  Of these thermoplastic resin films, a multilayer film made by coextrusion with a different film, a multilayer film made by laminating at different stretching angles, etc. can be used as required. Furthermore, it is naturally possible to make the film by combining the density and molecular weight distribution of the film used to obtain the required physical properties.

  As the innermost thermoplastic resin film, it is preferable to use LDPE, LLDPE produced by using LDPE, LLDPE and a metallocene catalyst, or a film using a mixture of these films and HDPE film.

  Examples of the material used for the tray include aluminum (Al) and an aluminum alloy. Examples of the aluminum alloy include an Al-Mg alloy, an Al-magnesium (Mg) -silicon (Si) alloy, an Al-copper (Cu) alloy, an Al-Si alloy, and an Al-zinc (Zn) -Mg alloy. An alloy etc. are mentioned.

  The flexible support used for the photostimulable phosphor sheet according to the present invention includes cellulose acetate film, polyester film, polyethylene terephthalate film, polyamide film, polyimide film, triacetate film, polycarbonate film and other plastic films, aluminum Foil, metal sheet such as aluminum alloy foil, general paper and printing base paper such as photographic base paper, coated paper or art paper, baryta paper, resin coated paper, described in Belgian Patent No. 784,615 Examples thereof include processed paper such as paper sized with polysaccharides, pigment paper containing pigments such as titanium dioxide, and paper sized with polyvinyl alcohol. Among these, a plastic film is preferable as a flexible support because of ease of processing and handling.

  The thickness of the flexible support varies depending on the material of the flexible support used, but is generally 80 to 1000 μm, and more preferably 80 to 500 μm from the viewpoint of handling. It is. The surface of these supports may be a smooth surface or a mat surface.

  Polyester can be used as the resin used for producing the photostimulable phosphor panel of the present invention.

  As a method for coating the photostimulable phosphor layer, a normal coating means such as a doctor blade, a roll coater, a knife coater, a comma coater, a lip coater, or an extrusion coater can be used.

  The photostimulable phosphor layer is composed of a binder and photostimulable phosphor particles. The “stimulable phosphor” forming the photostimulable phosphor layer is an optical, thermal, mechanical, scientific, or electrical device after the first light or high-energy radiation is irradiated. A stimulable phosphor that exhibits stimulated emission corresponding to the dose of initial light or high-energy radiation upon stimulation (stimulated excitation). From a practical aspect, a stimulable phosphor that exhibits stimulated emission by light stimulation (stimulated excitation) is preferred, and stimulated fluorescence that exhibits stimulated emission by stimulated excitation light having a wavelength of 500 nm or more and 1 μm or less. The body is preferred.

  Specific examples of the photostimulable phosphor constituting the photostimulable phosphor layer include, for example, JP-A Nos. 55-12145, 55-160078, 56-74175, 56-116777, 57- 23673, 57-23675, 58-206678, 59-27289, 59-27980, 59-56479, 59-56480, and the like. Halogenated phosphors: JP-A-59-75200, JP-A-60-84381, JP-A-60-106752, JP-A-60-166379, JP-A-60-212383, JP-A-60-228592, and JP-A-60-228593 61-23679, 61-120882, 61-120683, 61-120585, 61-235486, 6 Divalent europium-activated alkaline earth metal fluoride halide phosphors described in JP-A No. 235487; rare earth element-activated oxyhalide phosphors described in JP-A No. 55-12144; A cerium-activated trivalent metal oxyhalide phosphor described in JP-A-60-70484; a bismuth-activated alkali metal halide phosphor described in JP-A-60-70484; a divalent compound described in JP-A-60-141784 and 60-157100 Europium activated alkaline earth metal halophosphate phosphor; divalent europium activated alkaline earth metal haloborate phosphor described in JP-A-60-157099; divalent compound described in JP-A-60-217354 Europium-activated alkaline earth metal hydride phosphors; described in JP-A Nos. 61-21173 and 61-21182 Cerium-activated rare earth composite halide phosphor; cerium-activated rare earth halophosphate phosphor described in JP-A-61-40390; divalent europium-activated cerium-rubidium phosphor described in JP-A-60-78151 And divalent europium activated composite halide phosphors described in JP-A-60-78151.

  Examples The effects of the present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples.

  According to the following method, the bending / folding test of the surplus portion of the protective film of the photostimulable phosphor sheet was performed.

(Preparation of photostimulable phosphor sheet)
The photostimulable phosphor sheet used in the Regius plate-3S manufactured by Konica Corporation was used.

(Preparation of protective film)
As a protective film, a film having a multilayer structure of PET 12 μm / alumina-deposited PET 12 μm / CPP 30 μm was prepared.

(Folding / folding test of surplus part of protective film)
The method shown in Table 1 is applied to the photostimulable phosphor layer of the photostimulable phosphor sheet, leaving a 4 cm surplus portion on one side and sticking a protective film so that the protective film does not protrude from the other three sides. Thus, photostimulable phosphor sheets were prepared by coating the surplus portion with the protective film by folding and folding along the end face of the photostimulable phosphor sheet.

Note that A was folded and folded according to the flow shown in FIG. 2A using the folding and folding apparatus shown in FIG. B was folded and folded using the folding and folding apparatus shown in FIG. 1 according to the flow shown in FIG. C was folded and folded according to the flow shown in FIG. 5 using the folding and folding apparatus shown in FIG. D was folded and folded according to the flow shown in FIG. 7 using the folding and folding apparatus shown in FIG.

(Evaluation)
Table 2 shows the results of measuring the width of the sealed portion of each of the produced samples 101 to 104 with a scaled loupe.

  From the above results, it becomes possible to reduce the width of the sealing portion with the conventional protective film from 0.6 to 1.0 mm, so that it can be used safely for mammography (mammography). The effectiveness of the present invention was confirmed.

It is a schematic perspective view of the bending and folding apparatus of the surplus part of the protective film on the photostimulable phosphor sheet having the adsorption means. It is a schematic diagram which shows the flow of the bending / folding method of the surplus part of the protective film on a photostimulable fluorescent substance sheet using the folding / folding apparatus shown in FIG. It is a schematic perspective view of another example of the bending / folding device for the surplus portion of the protective film on the photostimulable phosphor sheet having the adsorbing means. It is a schematic perspective view of the bending / folding apparatus of the surplus part of the protective film on the photostimulable phosphor sheet having the pressure bonding means. It is a schematic diagram which shows the flow of the bending and the folding | returning method of the surplus part of the protective film on a photostimulable phosphor sheet using the folding / folding apparatus shown in FIG. It is a schematic perspective view of the bending and folding apparatus of the surplus part of the protective film on the photostimulable phosphor sheet using a plate-like elastic body. It is a schematic schematic diagram which shows the flow of the bending / folding method of the surplus part of the protective film on the photostimulable phosphor sheet using the folding / folding apparatus shown in FIG. It is the schematic of the apparatus which affixes a protective film on the strip | belt-shaped photostimulable fluorescent substance sheet conveyed continuously, and bends and folds an excess part. It is a schematic diagram which shows the flow of an example of the manufacturing method of a photostimulable phosphor panel. It is a schematic diagram which shows the flow of another example of the manufacturing method of a photostimulable phosphor panel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a, 1b Folding / folding apparatus 101 Adsorption part 102, 7 Folding / folding part 2 Stimulable phosphor sheet 3, 802 Protective film 301, 803 Surplus part 5 Base 6 Crimping means 604 Blade 701 Elastic body 9 Band-like stimulant Phosphor sheet 10 Press roll 11, 12, 13 Guide member 14 Tray 17 Stimulable phosphor panel

Claims (19)

A protective film having at least one side larger than the stimulable phosphor sheet is pasted on the stimulable phosphor layer side of the stimulable phosphor sheet in which the stimulable phosphor layer is formed on a flexible support. Attaching, folding at least one side of the surplus portion of the protective film along the end face of the photostimulable phosphor sheet, and folding and folding back the protective film on the back side of the photostimulable phosphor sheet.
Sucking and holding the excess portion of the photostimulable phosphor sheet side by suction means,
After moving the adsorption means in parallel with the surface of the photostimulable phosphor sheet, after moving to the end of the excess portion,
Using the adsorption means as a fulcrum on the side of the stimulable phosphor layer side of the end face of the stimulable phosphor sheet, the adsorbing means is in a downward direction so as to be parallel to the end face of the stimulable phosphor sheet. To bend the side of the protective film along the end face of the photostimulable phosphor sheet,
The adsorbing means is moved so that the adsorbing surface of the adsorbing means is parallel to the back surface of the stimulable phosphor sheet by using the edge of the support on the end face of the stimulable phosphor sheet as a fulcrum, and the protective film is folded back. A method for folding and folding back a protective film. A protective film having at least one side larger than the stimulable phosphor sheet is pasted on the stimulable phosphor layer side of the stimulable phosphor sheet in which the stimulable phosphor layer is formed on a flexible support. Attaching, folding at least one side of the surplus portion of the protective film along the end face of the photostimulable phosphor sheet, and folding and folding back the protective film on the back side of the photostimulable phosphor sheet.
Sucking and holding the excess portion of the photostimulable phosphor sheet side by suction means,
The adsorbing means is placed so that the adsorbing surface of the adsorbing means is parallel to the end face of the stimulable phosphor sheet, with the end face of the stimulable phosphor sheet being the fulcrum of the end face of the stimulable phosphor sheet. While bending in the direction, after folding one side of the protective film along the end face of the stimulable phosphor sheet,
The adsorbing means is moved so that the adsorbing surface of the adsorbing means is parallel to the back surface of the stimulable phosphor sheet, with the edge of the support on the end face of the stimulable phosphor sheet as a fulcrum. A method for folding and folding a protective film, characterized by folding. A protective film having at least one side larger than the stimulable phosphor sheet is pasted on the stimulable phosphor layer side of the stimulable phosphor sheet in which the stimulable phosphor layer is formed on a flexible support. Attaching, folding at least one side of the surplus portion of the protective film along the end face of the photostimulable phosphor sheet, and folding and folding back the protective film on the back side of the photostimulable phosphor sheet.
The center of the surplus portion near the stimulable phosphor sheet is sucked and held by two adsorbing means,
Each of the adsorption means moves in parallel with the surface of the photostimulable phosphor sheet toward two corners of the surplus portion, and after each of the adsorption means reaches each corner of the surplus portion,
Using each of the adsorption means as a fulcrum on the side of the stimulable phosphor layer side of the end face of the stimulable phosphor sheet, the adsorption surface of each adsorption means is parallel to the end face of the stimulable phosphor sheet. Move downward, bend one side of the protective film along the end face of the stimulable phosphor sheet,
The adsorbing means is moved so that the adsorbing surface of the adsorbing means is parallel to the back surface of the stimulable phosphor sheet by using the edge of the support on the end face of the stimulable phosphor sheet as a fulcrum, and the protective film is folded back. A method for folding and folding back a protective film. A protective film having at least one side larger than the stimulable phosphor sheet is pasted on the stimulable phosphor layer side of the stimulable phosphor sheet in which the stimulable phosphor layer is formed on a flexible support. Attaching, folding at least one side of the surplus portion of the protective film along the end face of the photostimulable phosphor sheet, and folding and folding back the protective film on the back side of the photostimulable phosphor sheet.
The center of the excess portion from the photostimulable phosphor sheet is sucked and held by two adsorbing means,
With each of the adsorbing means as the fulcrum of the end face of the stimulable phosphor sheet, the adsorbing surface of the adsorbing means is parallel to the end face of the stimulable phosphor sheet. In addition, while moving downward toward the two corners of the excess part, after bending one side of the protective film along the end face of the stimulable phosphor sheet,
The adsorbing means is moved so that the adsorbing surface of the adsorbing means is parallel to the back surface of the stimulable phosphor sheet by using the edge of the support on the end face of the stimulable phosphor sheet as a fulcrum, and the protective film is folded back. A method for folding and folding back a protective film. When the protective film is folded along the end face of the stimulable phosphor sheet with the end face of the stimulable phosphor sheet as a fulcrum, the corner of the end face of the stimulable phosphor layer side is crimped by a pressure-bonding means. The method for folding and folding back a protective film according to any one of claims 1 to 4, wherein folding and adhesion to the end face are performed. When the protective film is bent along the back surface of the photostimulable phosphor sheet with the edge of the support on the end surface of the photostimulable phosphor sheet as a fulcrum, the corner of the end of the support is angularly folded by a pressing means. The method for folding and folding the protective film according to claim 1, wherein the photostimulable phosphor sheet is closely attached to the back surface. The method of bending or folding back a protective film according to claim 5 or 6, wherein the pressure-bonding means is an elastic blade having a JIS-A rubber hardness of 10 to 70. The method for folding and folding a protective film according to claim 5 or 6, wherein the pressure-bonding means is a rotating roller having a JIS-A rubber hardness of 5 to 40. The rotating roller is used for corner folding of the end face of the stimulable phosphor sheet of the protective film on the side of the stimulable phosphor layer and closely contacting the end face, and a support for the end face of the stimulable phosphor sheet 9. The protective film according to claim 5, wherein an elastic blade is used for corner folding of the edge and adhesion to the back surface of the photostimulable phosphor sheet. Method. A protective film having at least one side larger than the stimulable phosphor sheet is pasted on the stimulable phosphor layer side of the stimulable phosphor sheet in which the stimulable phosphor layer is formed on a flexible support. Attaching, folding at least one side of the surplus portion of the protective film along the end face of the photostimulable phosphor sheet, and folding and folding back the protective film on the back side of the photostimulable phosphor sheet.
While moving a plate-like elastic body having a JIS-A rubber hardness of 10 to 70 along the back surface from the end surface of the photostimulable phosphor sheet, the brightness of the end surface of the photostimulable phosphor sheet in the excess portion is increased. A method for folding and folding a protective film, comprising: corner folding of the side of the stimulable phosphor layer side, adhesion to the end surface, and adhesion to the back surface of the stimulable phosphor sheet. A protective film having at least one side larger than the stimulable phosphor sheet is pasted on the stimulable phosphor layer side of the stimulable phosphor sheet in which the stimulable phosphor layer is formed on a flexible support. Attaching, folding at least one side of the surplus portion of the protective film along the end face of the photostimulable phosphor sheet, and folding and folding back the protective film on the back side of the photostimulable phosphor sheet.
While moving a rotating roller having a JIS-A rubber hardness of 5 to 40 along the end face of the photostimulable phosphor sheet, the stimulable phosphor layer on the end face of the stimulable phosphor sheet in the surplus portion Perform side folds and close contact with the end face,
While moving a plate-like elastic member having a JIS-A rubber hardness of 10 to 70 along the back surface of the photostimulable phosphor sheet, the surplus portion is folded and crimped to the back surface of the photostimulable phosphor sheet. A method for folding and folding back a protective film. The method of bending or folding back a protective film according to any one of claims 1 to 11, wherein a taper is provided so that the width of the surplus portion becomes narrower toward an end portion. A stimulable phosphor layer is formed on a band-shaped flexible support, and on the side of the stimulable phosphor layer of the band-shaped stimulable phosphor sheet that is continuously conveyed,
At least one side conveyed in the same direction as the belt-shaped stimulable phosphor sheet is attached with a band-shaped protective film wider than the width of the photostimulable phosphor sheet,
At least one side of the surplus portion of the protective film is bent along at least one end face of the band-like stimulable phosphor sheet by a bending means, is crimped to the end face by a pressure-bonding means, and the band-like stimulable fluorescence is turned by a folding means. A method for folding and folding a protective film, characterized in that it is folded and pressure-bonded to the back surface of the body sheet. The method for bending and folding back a protective film according to claim 13, wherein the folding means is a guide-like member having a JIS-A rubber hardness of 5 to 70. The method of folding and folding back a protective film according to claim 13, wherein the pressure-bonding means is a guide-like member having a JIS-A rubber hardness of 5 to 70. 14. The protective film according to claim 13, wherein the folding means is a guide-like member having a rotating roller having a JIS-A rubber hardness of 5 to 40 and a JIS-A rubber hardness of 5 to 70. Method. A protective film larger than the photostimulable phosphor sheet is attached to the photostimulable phosphor layer side of the photostimulable phosphor sheet in which the photostimulable phosphor layer is formed on a flexible support,
After leaving at least one side of the protective film, cutting the photostimulable phosphor sheet and the protective film into predetermined dimensions,
The one side is bent along the end face of the photostimulable phosphor sheet, crimped to the end face, and folded back to the back side of the stimulable phosphor sheet,
A tray is bonded to the support side of the photostimulable phosphor sheet,
Except for the end face covered with the protective film of the stimulable phosphor sheet, the periphery of the stimulable phosphor sheet is covered with resin coating,
A method for producing a photostimulable phosphor panel, wherein the photostimulable phosphor sheet is sealed between the protective film and the tray. A protective film having a side larger than the stimulable phosphor sheet on the stimulable phosphor layer side of the stimulable phosphor sheet in which the stimulable phosphor layer is formed on a flexible support, After the three sides excluding the one side are attached to the three sides of the photostimulable phosphor sheet,
The one side is bent along the end face of the photostimulable phosphor sheet, crimped to the end face, and folded back to the back side of the stimulable phosphor sheet.
A tray is bonded to the support side of the photostimulable phosphor sheet,
Except for the end face covered with the protective film of the photostimulable phosphor sheet,
Covering the peripheral end surface of the photostimulable phosphor sheet with resin coating,
A method for producing a photostimulable phosphor panel, wherein the photostimulable phosphor sheet is sealed between the protective film and the tray. A protective film having at least one side larger than the stimulable phosphor sheet is pasted on the stimulable phosphor layer side of the stimulable phosphor sheet in which the stimulable phosphor layer is formed on a flexible support. At least one side of the protective film is bent along the end face of the stimulable phosphor sheet, and a tray is attached to the support side of the stimulable phosphor sheet folded back to the back surface of the stimulable phosphor sheet. In the stimulable phosphor panel,
The protective film has a thickness of 1 to 60 μm, and has a gap of 0.05 to 0.5 mm between the protective film and the end face of the stimulable phosphor sheet,
A photostimulable phosphor panel, wherein the periphery of the photostimulable phosphor sheet is covered with a resin coating except for an end face covered with the protective film.

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