JP2000039683A - Cassette for radial rays - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily clean the inside of a housing recessed part in a short time by integrally coupling a back plate and a cover plate through a supporting shaft and enabling the back plate to be opened and closed with the supporting shaft as a supporting point. SOLUTION: The back plate 6 and the cover plate 7 are integrally coupled by the supporting shaft 21. By supporting one end and the other end 21b of the shaft 21 at the supporting shaft guide hole 18 of a short frame member 3b, the plates 6 and 7 are arranged in the edge 3d of a frame member 3 so that they can be respectively opened and closed with the shaft 21 as the supporting point. Three outside parts of the plate 6 are laid on the frame members 3a and 3b on an opposite side to an insertion/ejection port 11. The outside parts of both ends of the plate 7 are laid on the frame member 3b on the port 11 side. The plate 7 is slid and moved to the housing feasible position in the edge 3d. Then, a slider stopper 33 is separated from a position where it abuts on a guide member and positioned between the guide member and a guide block. The outside parts of both ends of the plate 7 are closely brought into contact with the frame member 3b and the close state thereof is held by a cover plate lock mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiation cassette for storing a sheet-like image recording medium such as a stimulable phosphor sheet or a radiographic film and recording a radiographic image on the sheet-like image recording medium. About.

[0002]

2. Description of the Related Art As a sheet-like image recording medium for recording a radiographic image, a wet radiographic film in which a photographed radiographic image is represented on a film surface by a developing solution treatment, and a stimulable phosphor layer laminated on the sheet surface. Part of the radiation energy is stored as an image in the image, and this is scanned with excitation light to detect photostimulated light emitted from the radiation image photoelectrically, and the radiation image information is read by an electrical signal, and is a dry storage fluorescent light. There is a body sheet, containing these sheet-shaped image recording media, as a radiation cassette to be used for radiography,
For example, there is one disclosed in JP-A-5-307218.

In this radiation cassette, a frame is fixed to one side outer edge of a rectangular front plate, and a sheet-like image recording medium such as a stimulable phosphor sheet or a radiographic film is provided inside the frame. A cassette body provided with an accommodating recess for accommodating the frame, and a back plate that faces the front plate and covers the frame body. A part of the back plate is separated as a lid plate, and the back plate has a large number of stoppers. The cover plate is fixed to the frame using screws, and the cover plate is pivotally supported by a support shaft engaged with the frame body, and a sheet-like image recording medium insertion / removal port set on one side of the cassette body is connected to the cover plate. The cover is configured to be openable and closable.

[0004]

In order to read radiation image information from a sheet-like image recording medium photographed using the above-described radiation cassette, the radiation cassette is loaded into a reading device, and the radiation cassette is inserted into the receiving recess. In order to mechanically pull out the sheet-shaped image recording medium from the side of the lid plate, the sheet-shaped image recording medium opening and closing area when the lid plate and the lid plate are opened may be small, and the back plate and the lid plate Area ratio is about 1:
It is formed in about two.

[0005] In such a radiation cassette,
Every time the cover plate is opened and closed when the sheet-shaped image recording medium is taken in and out, dust and dirt enter the housing recess from the sheet-shaped image recording medium inlet / outlet, and in some cases, may be photographed on the sheet-shaped image recording medium. Therefore, it is necessary to clean the inside of the accommodation recess. However, about 2
Since the third part is covered in a bag shape by the back plate fixed to the frame using a large number of setscrews, it is extremely difficult to clean without removing the back plate. In such a case, it takes a long time to remove and attach a troublesome back plate.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a radiation cassette capable of easily cleaning the inside of a housing recess in a short time.

[0007]

According to the above object, according to the first aspect of the present invention, a frame is fixed to an outer edge of one side surface of a rectangular front plate, and a stimulable phosphor is provided inside the frame. A cassette body provided with an accommodation recess for accommodating a sheet-shaped image recording medium such as a sheet or a radiographic film; a back plate and a cover plate facing the front plate and covering the frame; and supporting the cover plate. A radiation cassette which is pivotally supported by an axis to cover the opening and closing of the sheet-shaped image recording medium set on one side of the cassette main body so as to be openable and closable by the lid plate; The plate and the plate are integrally connected via the support shaft, and the back plate can be opened and closed about the support shaft.

According to a second aspect of the present invention, the back plate according to the first aspect of the present invention includes the combination of a set screw and a female screw hole, a combination of a latch, a lock lever, a slide pin and a pin hole, a combination of a slide pin and an engagement claw. Using the back plate locking means such as a combination of the above, the cassette body is openably and closably engaged with the cassette body. Claim 3
In the present invention, an engaging claw is protruded from the inner surface of the back plate according to the first or second aspect of the present invention, and the frame body is provided with an engaging hole for engaging with the engaging claw when the back plate is closed.

According to the invention of claim 4, claims 1 to 3 are provided.
In any one of the inventions described above, a long shaft guide hole long in a direction orthogonal to the support shaft is provided opposite to two frame members of the frame body orthogonal to the support shaft, and the support shaft guide hole is provided in the support shaft guide hole. Supporting both ends, the back plate and the cover plate can be slid in a direction orthogonal to the support shaft.

According to a fifth aspect of the present invention, the engaging claw of the back plate and the engaging hole of the frame according to the third aspect of the present invention are disengaged by sliding the back plate and the lid plate.

According to a sixth aspect of the present invention, in the fifth aspect of the invention, the back plate locking means is provided by screwing a set screw.
The back plate and the lid plate are pulled in the direction of the back plate, and a combination of a set screw and a female screw hole for engaging the engaging claw of the back plate with the engaging hole of the frame body.

According to a seventh aspect of the present invention, in any one of the first to sixth aspects, the support shaft is movable in the axial direction with respect to the back plate and the cover plate, and a sheet-like image of the support guide hole is provided. At the end of the recording medium inlet / outlet side, a spindle attachment / detachment hole that penetrates the inside and outside of the frame body is connected, and one of the spindle attachment / detachment holes is formed to have a diameter through which the spindle can be inserted. Is formed to have a smaller diameter than the support shaft.

According to an eighth aspect of the present invention, according to any one of the first to sixth aspects, the support shaft is movable in the axial direction with respect to the back plate and the cover plate, and a sheet-like image of the support guide hole is provided. At the end of the recording medium insertion / removal port side, a spindle attachment / detachment hole penetrating into and out of the frame body is connected to each other, and the spindle attachment / detachment hole is formed to have a diameter through which the spindle can be inserted.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 is a side view of the radiation cassette with the cover plate opened, FIG. 2 is a perspective view of the radiation cassette with the back plate and the cover plate closed, and FIG. 3 is the same with the back plate and the cover plate open. FIG. 4 is an enlarged front view of a lid plate portion of the radiation cassette, FIG. 5 is a VV cross-sectional view of FIG. 4, FIG. 6 is an enlarged front view of a back plate portion of the radiation cassette, FIG. 7 is a sectional view taken along line VII-VII of FIG.

The radiation cassette 1 has a frame 3 fixed to an outer edge of one side of a rectangular surface plate 2 in a U-shape, and a stimulable phosphor sheet or radiation (not shown) is provided inside the frame 3. A cassette body 5 provided with a housing recess 4 for housing a sheet-shaped image recording medium such as a photographic film, and a frame 3 facing the front plate 2
Plate 6 and cover plate 7 that cover side by side approximately 2: 1 in size
Opening and closing latches 8 and 8 and a transparent information display window 9 are provided on the outer surface of the cover plate 7.

The front plate 2 is made of a light and strong plate material such as carbon fiber reinforced resin.
Protective sheet 10 for protecting sheet-shaped image recording medium
Is affixed. The frame body 3 includes three long and short frame members 3a, 3b, 3b formed in a hollow quadrangular cross section and four corner blocks 3c disposed at the ends of the frame members 3a, 3b, 3b. A side of the cassette body 5 not connected to the frame 3 is connected to one side of the cassette main body 5 and inserted into and out of a sheet-like image recording medium for inserting and removing a sheet-like image recording medium. Mouth) 1
1 A back plate 6 and a cover plate 7 are provided on the outer peripheral edge of the frame 3.
An edge 3d having a height corresponding to the thickness of the edge 3d is continuously provided in a U-shape. Inside the edge 3d, the above-described back plate 6 and cover plate 7 are arranged side by side.

The long frame member 3a of the frame 3 is provided with an assembling hole 12 and an insertion hole 13 at the center and engaging holes 14 and 14 at both sides thereof. And the engagement holes 14 and 14 are formed by cutting out two surfaces of an upper surface plate and an inner surface plate of the long frame member 3a, and the insertion hole 13 is provided outside the assembly hole 12 and outside the long frame member 3a. It is provided penetrating the face plate in and out. Two short frame members 3b, 3 of the frame body 3
b, cover plate locking mechanisms 16 and 16 are provided in opposition to recesses 15 and 15 in which two surfaces of the upper surface plate and the inner surface plate on the front end side are cut out, and the upper surface plate is cut into a rectangle at a substantially central portion. The engaging holes 17 and 17 are provided to face each other, and a shaft guide hole 1 is formed in an outer surface plate between the lid plate locking mechanism 16 and the engaging hole 17.
8, 18 and support shaft attaching / detaching holes 19, 20 are provided facing each other.

The back plate 6 and the cover plate 7 are integrally connected by a support shaft 21. One end 21a and the other end 21b of the support shaft 21 are connected to each other.
By being supported by the support shaft guide holes 18 of the short frame members 3 b, the support members 21 are respectively provided in the edges 3 d of the frame member 3 so as to be openable and closable with the support shaft 21 as a fulcrum. However, the frame member 3a,
3b, and both ends of the cover plate 7 are extended over the short frame members 3b, 3b at the entrance 11 side.

On the inner surface of the back plate 6, a lead sheet 22, a cushioning material 23, and a protective cover 24 are laminated except for the three outer sides of the long frame member 3a and the short frame members 3b, 3b. I have. A female screw piece 25 is provided at the center of the outer surface of the inner surface of the long frame member 3a, and engagement claws 26, 26 are provided on both sides thereof, and the engagement claws 2 are provided on both outer surfaces of the inner surface of the short frame members 3b, 3b.
7 and 27, and a shaft hole 28a
Is provided.

The female screw piece 25 and the engaging claws 26 are provided corresponding to the mounting holes 12 and the engaging holes 14 of the long frame member 3a, respectively. It is provided corresponding to the engagement holes 17, 17 of the short frame members 3b, 3b. A female screw hole 25a is engraved on the front surface of the female screw piece 25, and four engagement claws 26, 26, 27, 27 are provided. Is formed in an inverted L-shape with the tip directed toward the long frame member 3a.

The above-mentioned latches 8 and 8 and an information display window 9 are provided on the outer surface of the cover plate 7, and two partitions for closing between the corner blocks 3c and 3c are provided inside the end of the door opening 11 side. The plates 29, 29 are provided in parallel. A lead sheet 30 and a protective cover 31 are laminated on the inner surface of the lid plate 7 except for the three outer sides of the partition plates 29, 29 and the short frame members 3b, 3b, and the short frame members 3b, 3b Engaging claws 32, 32 and slider stoppers 33, 33 are provided on both inner and outer portions of the inner side, and a shaft hole 28b is provided at an end on the back plate 6 side. The engaging claws 32, 32 are formed in an inverted L-shape with their tips facing the long frame member 3 a, and an interlocking arm 8 a integral with the latch 8 is provided between the engaging claws 32 and the slider stopper 33. Is protruding.

The cover plate lock mechanism 16 automatically opens and closes the cover plate 7 with the reading device when the radiation cassette 1 is loaded in a reading device (not shown), and takes out and puts the sheet-shaped image recording medium. A slider 34 slidably disposed in the recess 15 of the frame 3, and a long frame member 3 a from the guide block 34 d of the slider 34.
A guide bar 35 protruding in the direction, a guide member 36 for guiding the slide of the guide bar 35, and a guide member 36.
A compression coil spring 37 wound around the guide rod 35 between the guide rod 34d and the guide block 34d; a guide hole 38 penetrating the corner block 3c at the end of the inlet / outlet 11 side; ing.

The slider 34 is provided with a slide pin 34c having a stopper 34b and an above-mentioned guide block on the upper surface of the end of the guide plate 34a housed in the recess 15 of the frame 3 on the side of the slot 11 and on the side of the long frame member 3a. 34d are provided, and an engagement claw 34e is provided between them to protrude toward the inlet / outlet 11 at the tip. Slider 3
4 is constantly urged in the direction of the inlet / outlet 11 by the resilient force of the compression coil spring 37 contracted between the guide block 34d and the guide member 36, and the retreat is restricted between the stopper 34b and the corner block 3c. Regulated by contact.

In this state, the entire slide pin 34c is housed in the guide hole 38 of the corner block 3c, and the guide block 34d contacts the interlocking arm 8a of the latch 8 to urge the latch 8 in the closing direction. The slider 34 and the engaging claws 32, 34e of the cover plate 7 are engaged, and the closed state of the cover plate 7 is maintained. Also, the slider stopper 3 of the cover plate 7
Reference numeral 3 is located between the guide block 34d and the guide member 36 when the cover plate 7 is closed, and supports the guide block 34d when the cover 34 is opened by sliding the slider 34 in the direction of the long frame member 3a. Thus, the sliding amount of the slider 34 is regulated.

A support shaft 21 for connecting the back plate 6 and the cover plate 7 so as to be openable and closable is formed by connecting both ends 21a, 21b to short frame members 3b, 3b.
The shaft holes 28 of the back plate 6 and the cover plate 7 have a length sufficient to span the support shaft guide holes 18 facing the outer surface plate of the rear plate 6.
a, 28b are provided movably in the axial direction. The spindle attachment / detachment holes 19, 20 penetrate the inside and outside of the outer surface plates of the short frame members 3b, 3b, so that the spindle guide holes 18, 18 can be inserted and removed.
One of the support shaft attaching / detaching holes 1
9 is formed with a diameter that allows the insertion of the support shaft 21, and the other support shaft attaching / detaching hole 20 is formed with a smaller diameter than the support shaft 21.

The back plate 6 is engaged with the cassette body 5 using a set screw 39 so as to be openable and closable.
And the screw holes 25a provided in the insertion holes 13 of the frame 3 and the female screw pieces 25 of the back plate 6, the back plate locking means 40 of the present embodiment.
Is configured.

The present embodiment is configured as described above, and the back plate 6 and the cover plate 7 are integrally connected to the support shaft 21 in advance before assembling to the cassette body 5. The other end 21b of the support shaft 21 connecting the back plate 6 and the cover plate 7 has a shaft hole 28a,
28b so that one end 21a protrudes from the shaft holes 28a and 28b, and the one end 21a is inserted into one support shaft attaching / detaching hole 19 from the inside of the accommodation recess 4 to connect the back plate 6 and the cover plate 7 to the frame member 3. Of the support shaft 21 from the outside of one of the support shaft attachment / detachment holes 19, and the other end 21b is brought into contact with the inside of the other support shaft attachment / detachment hole 20. One end and the other end 21a, 21b of 21 are extended over the support shaft guide holes 18, 18.

Thus, the two engaging claws 26 of the back plate 6
26 is located in the accommodation recess 4, and the other two engagement claws 27,
27 enters the engaging holes 17, 17 of the short frame members 3b, 3b, and the outer portion of the back plate 6 comes into close contact with the short frame members 3b, 3b. In this state, the slider stopper 3 of the lid plate 7
Since 3 is in contact with the upper surface of the guide block 34d, the cover plate 7 is inclined in a half-open state.

Next, the back plate 6 and the cover plate 7 are connected to the long frame member 3a.
Slide in one direction. The sliding amount of the back plate 6 and the cover plate 7 is regulated by one end and the other end 21a, 21b of the support shaft 21 abutting on the end of the support shaft guide holes 18, 18 on the long frame member 3a side. By sliding the back plate 6 and the cover plate 7, the outer portion of the back plate 6 on the long frame member 3a side becomes the long frame member 3a.
The female screw piece 25 enters the assembling hole 12 of the long frame member 3a, and the two engaging claws 26, 26 on both sides thereof enter the engaging holes 14, 14 of the long frame member 3a, respectively. The other two engaging claws 27 slide in the engaging holes 17 of the short frame members 3b in the direction of the long frame member 3a.

Then, one end and the other end 21a of the support shaft 21,
In a state in which the contact 21b is in contact with the end of the support shaft guide holes 18, 18 on the long frame member 3a side, the four engagement claws 26, 2 of the back plate 6 are provided.
6, 27, 27 have engagement holes 14, 14, 17, 1
7, they enter the inside of the upper plate of the long frame member 3 a and the short frame members 3 b, 3 b, and the back plate 6 and the engagement claws 26, 26, 27, 2
The upper end plates of the long frame member 3a and the short frame members 3b, 3b are firmly sandwiched between the front end of the base member 7 and the front end of the short frame member. As a result, the mounting rigidity of the back plate 6 is increased.

On the other hand, the lid plate 7 is moved to a position where it can be accommodated in the edge 3d by the above-mentioned slide, and the slider stopper 33 comes out of contact with the guide member 36, and the guide member 36 and the guide block 34d Located between.
As a result, the outer ends of both ends of the cover plate 7 are short frame members 3b, 3b
The cover plate 7 is brought into close contact with the cover plate 7 by the cover plate lock mechanisms 16 and 16.
Is held as described above.

Next, a set screw 39 is inserted into the insertion hole 13 of the long frame member 3a, and the tip of the set screw 39 is screwed into the female screw hole 25a of the female screw piece 25 to fix the back plate 6. As a result, the back plate 6 and the cover plate 7 are pulled in the direction of the long frame member 3a (back plate direction), and the back plate 6 and the engagement claws 26, 2
6, 27, 27, the long frame member 3a and the short frame member 3
Since the upper plates b and 3b are sandwiched more firmly, the mounting rigidity of the back plate 6 is further increased.

The radiation cassette 1 configured as described above
In the case where the sheet-shaped image recording medium is automatically taken in and out by using the reading device, the cover plate locking mechanisms 16 and 16 are used.
The release member of the reading device is inserted into the guide holes 38, 38, and the slide pins 34c in the respective guide holes 38 are pushed in, and the slider 34 is moved in the direction of the long frame member 3a against the elastic force of the compression coil spring 37. By sliding, the slider 34 and the engagement claws 32 and 34e of the cover plate 7 are disengaged, and the cover plate 7 is opened around the support shaft 21 as a fulcrum. The user inserts and removes the sheet-shaped image recording medium from 11.

The cover plate 7 can be opened and closed by operating the latches 8, 8. By sliding the latches 8, 8 in the direction of the back plate 6, the interlocking arm 8 a of the latch 8 abutting on the guide block 34 d is opened. , The slider 34 is slid in the direction of the long frame member 3a, and the engaging claw 3
The engagement between 2, 34e is released.

When cleaning the inside of the housing recess 4 of the cassette body 5, the set screw 39 is removed to release the fixed state of the back plate 6, and the cover plate 7 is tilted to the open state, and the cover plate 7 is opened. 7 and the back plate 6 are integrally slid in the direction of the access port 11, and the support shaft 21 is moved in the direction of the access port 1 of the support guide holes 18.
When it is positioned at the first side end, the engagement claws 26, 26, 2 of the back plate 6
The engagement between the engagement holes 14, 14, 17, and 17 of the frame 3 is released, and the back plate 6 and the cover plate 7 are opened with the support shaft 21 as a fulcrum. Is exposed and can be cleaned.

Further, in order to remove the back plate 6 and the lid plate 7 from the cassette body 5, the support shaft 21 must be connected to the support guide holes 18,1.
8 with the support shaft 21 positioned at the end of the entrance 11
The other end 21b of the support shaft 21 is pushed in from the outside of the other support shaft attachment / detachment hole 20, and the one end 21a of the support shaft 21 projects into the one support attachment / detachment hole 19, so that the other end 21b of the support shaft 21 is supported by the support shaft guide. The back plate 6 and the cover plate 7 can be removed from the holes 18.

As described above, in this embodiment, the back plate 6 and the cover plate 7 are integrally connected to the cassette body 5 via the support shaft 21, and the back plate 6 and the cover plate 7 are connected to the support shaft 21. Can be easily opened and closed around the fulcrum, so that the entire accommodation recess 4 can be exposed, and the interior of the accommodation recess 4 can be easily and simply cleaned in a short time. It is possible to solve the problem that dust and dust are photographed.

Further, in this embodiment, the back plate 6 is connected to the cassette body 5 so as to be openable and closable by the back plate locking means 40 using one set screw 39, so that the back plate 6 can be easily disengaged. In addition, when the radiation cassette 1 is used, the closed state of the back plate 6 can be reliably maintained.

Also, engaging claws 26,
26, 27, 27 are protrudingly provided, and the frame 3 has a long frame member 3a and a short frame member 3b, 3b which are engaged with the engagement claws 26, 26, 27, 27 when the back plate 6 is closed. Hole 14,1
4, 17, 17 are provided, and the back plate 6 and the engaging claws 26, 26,
27 and 27, the long frame member 3a and the short frame member 3b,
Since the upper plate 3b is sandwiched, the mounting rigidity of the back plate 6 is enhanced, and even if the large-sized back plate 6 is used for the large radiation cassette 1, the back plate 6 is hardly deformed by external force. It will be.

Further, two short frame members 3b, 3b of the frame 3 orthogonal to the support shaft 21 are provided with support shaft guide holes 18, 18 long in the direction orthogonal to the support shaft 21 so as to face each other. One end and the other end 21a, 21 of the support shaft 21 are inserted into the guide holes 18, 18, respectively.
Since the back plate 6 and the cover plate 7 can be slid in the direction orthogonal to the support shaft 21 while supporting the b, the back plate 6 can be opened and closed by a simple operation to perform a cleaning operation.

The engaging claws 26, 26, 27,
Since the engagement holes 14, 14, 17, and 17 of the frame body 3 are engaged and disengaged by sliding the back plate 6 and the cover plate 7, the back plate 6 can be attached with increased rigidity. 6
Can be easily opened and closed.

Further, the back plate locking means 40 is pulled in the direction of the back plate 6 by screwing the set screw 39 into the back plate 6 and the cover plate 7, and the engaging claws 26, 26, 27, 27 of the back plate 6 are engaged with each other. Set screw 4 for engaging with engagement holes 14, 14, 17, 17 of frame 3
With the combination of the rear plate 6 and the female screw holes 25a, not only can the back plate 6 be easily engaged and disengaged very easily, but also the long frame member 3a can be formed by the back plate 6 and the tips of the engaging claws 26, 26, 27, 27.
And the upper plates of the short frame members 3b, 3b are sandwiched more reliably and deeply, so that the mounting rigidity of the back plate 6 can be further increased.

Further, in the present embodiment, the support shaft 21 can be moved in the axial direction with respect to the back plate 6 and the cover plate 7, and the frame guide holes 18, 18 are respectively provided at the end of the insertion / removal port side. 3
The shaft attachment / detachment holes 19 and 20 penetrating into and out of the shaft are connected to each other, one of the spindle attachment / detachment holes 19 is formed to have a diameter through which the spindle 21 can be inserted, and the other spindle attachment / detachment hole 20 is connected to the spindle 21. By making the diameter smaller than that, the back plate 6 and the lid plate 7 can be easily attached and detached integrally. In particular, back plate 6 and lid plate 7
At the time of assembling, the small-diameter support shaft attaching / detaching hole 20 side serves as a stopper wall of the support shaft 21 to prevent the support shaft 21 from penetrating, so that the assembling work of the back plate 6 and the cover plate 7 can be performed extremely easily. Can be.

According to the present invention, both of the support shaft attaching / detaching holes may be formed to have a diameter through which the support shaft can be inserted, so that the support shaft can be inserted into or removed from any of the support shaft insertion holes. Further, when the back plate locking means is configured by combining a set screw and a female screw hole, the set screw may be screwed in from the outer surface side of the back plate.

As other configurations of the back plate locking means, a latch as used for opening and closing the cover plate in the embodiment, and a slide or rotation type lock lever may be used. further,
The back plate locking means may be a combination of a slide pin and a pin hole for inserting and removing a slide pin into and out of a pin hole formed in both the cassette body and the back plate, or any one of the cassette body and the back plate. By providing a slide pin on one side and an engagement claw on the other, and sliding the slide pin in the axial direction, a combination of a slide pin and an engagement claw that disengages the slide pin and the engagement claw can also be provided. .

In the combination of the latch and the lock lever, the slide pin and the pin hole, and the combination of the slide pin and the engagement claw, when the radiation cassette is used, the closed state of the back plate is maintained well. At the time of cleaning the inside of the accommodation recess, the lid plate can be opened and closed with one touch without using a tool, which is convenient. Further, in the case of a combination of a latch, a lock lever, a slide pin and an engagement claw, it is more preferable because no parts are lost.

[0047]

As described above, according to the first aspect of the present invention, the back plate and the cover plate are connected by the support shaft, and both the back plate and the cover plate are opened by using the support shaft as a fulcrum. In addition, since substantially the entirety of the storage recess is exposed, cleaning of the storage recess can be performed easily in a short time, and dust and dust in the storage recess are photographed on the sheet-shaped image recording medium. Can be eliminated.

According to the second aspect of the present invention, since the back plate is attached to the cassette body by the back plate locking means so as to be openable and closable, the back plate can be easily engaged and disengaged, and the radiation cassette can be used. At times, the closed state of the back plate can be reliably maintained. In particular, when the back plate locking means is a combination of a latch or a lock lever, a slide pin and a pin hole, or a combination of a slide pin and an engaging claw, the closed state of the back plate is set when the radiation cassette is used. While maintaining good,
When cleaning the housing recess, the lid can be opened and closed with one touch without using a tool, which is convenient.Moreover, in the case of a combination of a latch, a lock lever, a slide pin and an engaging claw, there is no loss of parts. Even more preferred.

Furthermore, in the third aspect of the present invention, when the back plate is closed, the back plate and the engaging claw sandwich a part of the frame, so that the mounting rigidity of the back plate is increased, and a large radiation cassette is provided. Even if a back plate having a large area is used, the back plate is unlikely to be deformed by an external force.

According to the fourth aspect of the present invention, since the back plate and the cover plate can be slid by the support shaft guide hole of the frame, the back plate can be opened and closed by a simple operation to clean the inside of the housing recess. Work can be performed easily. Furthermore, in the invention of claim 5, the engagement between the engaging claw of the back plate and the engaging hole of the frame is performed by sliding the back plate and the cover plate, so that the mounting rigidity of the back plate is increased. In addition, the back plate can be easily opened and closed.

According to the sixth aspect of the present invention, since the back plate locking means is a combination of a set screw and a female screw hole, not only can the back plate be easily engaged and disengaged, but also the back plate can be engaged with the back plate. Since a part of the frame body is securely and deeply sandwiched between the dovetails, the rigidity of the back plate can be further increased.

Further, according to the invention of claim 7 or 8, the back plate and the cover plate can be easily attached and detached integrally. In particular, according to the invention of claim 7, when the back plate and the lid plate are assembled to the cassette body, the small-diameter support shaft attaching / detaching hole side serves as a support wall of the support shaft to prevent the support shaft from penetrating. The work of assembling the back plate and the cover plate can be performed extremely easily.

[Brief description of the drawings]

FIG. 1 is a side view of a radiation cassette in a state where a cover plate is opened, showing one embodiment of the present invention.

FIG. 2 is a perspective view of a radiation cassette in a state in which a back plate and a lid plate are closed, showing one embodiment of the present invention.

FIG. 3 is a perspective view of the radiation cassette with a back plate and a cover plate opened according to an embodiment of the present invention.

FIG. 4 is an enlarged front view of a lid plate portion of the radiation cassette showing one embodiment of the present invention.

FIG. 5 is a cross-sectional view taken along the line VV of FIG. 4 showing one embodiment of the present invention.

FIG. 6 is an enlarged front view of a back plate portion of the radiation cassette showing one embodiment of the present invention;

FIG. 7 is a sectional view taken along the line VII-VII of FIG. 6, showing one embodiment of the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Radiation cassette 2 ... Top plate 3 ... Frame body 3a ... Long frame member 3b ... Short frame member 3c ... Corner block 3d ... Edge 4 ... Housing recess for accommodating a sheet-shaped image recording medium 5 ... Cassette body 6 ... Back plate DESCRIPTION OF SYMBOLS 7 ... Latch plate 8 ... Latch 8a ... Interlocking arm 11 ... Sheet-shaped image recording medium insertion / removal port 14,17 ... Engagement hole 16 ... Lid plate lock mechanism 18 ... Spindle guide hole 19,20 ... Spindle attachment / detachment hole 21 ... Shaft 21a ... One end of support shaft 21b ... Other end of support shaft 21 25 ... Female screw piece 25a ... Female screw hole 26, 27, 32 ... Engagement claw 34 ... Slider 39 ... Set screw 40 ... Back plate locking means

Claims (8)

[Claims] 1. A housing in which a frame is fixed to one side outer edge of a rectangular front plate, and a sheet-like image recording medium such as a stimulable phosphor sheet or a radiographic film is housed inside the frame. A cassette body provided with a concave portion, a back plate and a cover plate which cover the frame body facing the front plate, and the cover plate is pivotally supported by a support shaft, and one side of the cassette body In a radiation cassette that covers the opening and closing of the sheet-shaped image recording medium set to be openable and closable with the cover plate, the back plate and the cover plate are integrally connected via the support shaft, and A radiation cassette characterized in that the back plate can be opened and closed about a support shaft. 2. A back plate locking means such as a combination of a set screw and a female screw hole, a combination of a latch, a lock lever, a slide pin and a pin hole, a combination of a slide pin and an engagement claw, and the like. 2. The radiation cassette according to claim 1, wherein the cassette is openably and closably attached to the cassette main body by using. 3. An engaging claw protruding from an inner surface of the back plate, and an engaging hole for engaging with the engaging claw is provided in the frame when the back plate is in a closed state. The radiation cassette according to claim 1 or 2, wherein 4. A support shaft guide hole which is long in a direction orthogonal to the support shaft is provided on two frame members of the frame body orthogonal to the support shaft, and the support shaft guide hole is provided in the support guide hole. The radiation cassette according to any one of claims 1 to 3, wherein both ends are supported, and the back plate and the lid plate are slidable in a direction orthogonal to the support shaft. 5. The radiation cassette according to claim 3, wherein the engaging claw of the back plate and the engaging hole of the frame are disengaged by sliding the back plate and the lid plate. . 6. The back plate locking means pulls the back plate and the cover plate in the direction of the back plate by screwing in a set screw, and engages with the engaging claw of the back plate and the engaging hole of the frame. 6. The radiation cassette according to claim 5, wherein the combination is a combination of a set screw and a female screw hole that engages. 7. The frame according to claim 1, wherein the support shaft is movable in the axial direction with respect to the back plate and the cover plate, and the support shaft guide hole is provided at an end of the sheet-shaped image recording medium in and out of the frame member. A shaft attachment / detachment hole penetrating inside and outside is continuously provided, one of the shaft attachment / detachment holes is formed to have a diameter through which the spindle can be inserted, and the other is formed to have a smaller diameter than the spindle. Claim 1
A cassette for radiation according to any one of claims 1 to 6. 8. The frame according to claim 1, wherein the support shaft is movable in the axial direction with respect to the back plate and the cover plate. The radiation cassette according to any one of claims 1 to 6, wherein a support shaft attaching / detaching hole penetrating inside and outside is continuously provided, and the support shaft attaching / detaching hole is formed to have a diameter through which the support shaft can be inserted. .