JP2702790B2 - Cassette loading device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is capable of loading various cassettes accommodating a film or the like according to the size thereof, taking out the film from the cassette, and stacking a plurality of films. The present invention relates to a cassette loading device capable of transferring to a magazine.

[Prior Art] Conventionally, a cassette for keeping a film on which an X-ray image has been exposed in a light-shielded state is loaded into a predetermined device, and the exposed film in the cassette is loaded into a magazine, and then the cassette is removed. A configuration for taking out from the device is employed. For example, this type of device has become widely adopted in connection with mammography imaging devices.

Therefore, the relationship with this mammography imaging device is
This will be schematically described with reference to the drawings.

The film a stored in the stacked package is loaded into the magazine b in a bright room, and is loaded into the loading device c. On the other hand, an empty flat cassette d is inserted into the loading device c. In this case, when the laminated films a have different sizes, for example, the laminated film a 'is loaded into a magazine b' in a bright room, and the loaded film c is loaded into the magazine b 'in a light room. An empty cassette d 'will be inserted. Then, for example, in the loading device c, the unexposed film is transferred from the magazine b to the cassette d via a sheet-feeding mechanism (not shown), and the cassette d is taken out while maintaining the film in a light-shielding state. . The flat cassette d of this type is then used for imaging in the mammography imaging apparatus e for confirming the presence or absence of breast cancer or the like of a waiting woman.

Thereafter, the cassette f including the exposed film is loaded into a cassette loading device g having an automatic developing machine or a cassette loading device h having no automatic developing device, that is, a cassette loading device h existing alone, and a sheet-feeding mechanism. Through magazine i
In this case, a plurality of sheets are stacked and stored. This magazine i
The film therein is then fed to an automatic processor as described above to obtain a developed radiograph.

[Problems to be Solved by the Invention] By the way, in a conventional film cassette loading device, a belt or a roller row is generally arranged when the cassette is transferred from the device to the outside of the device (or vice versa). This is done by the mechanism. In this case, there is an advantage that the cassette can be automatically loaded and unloaded, but the belt and the roller row are configured to have a variable interval between each other, for example, to accommodate a plurality of cassettes having different sizes. There must be. However, according to such an automatic cassette loading device, the manufacturing cost becomes extremely large, and the size cannot be reduced to a small extent as a whole.

On the other hand, a cassette loading / discharging device configured to manually insert and transfer a cassette has been conventionally proposed. In this case, a cassette guide member is provided inside the apparatus so that a plurality of types of cassettes can be inserted when the lid of the apparatus is opened.
However, if such a manual operation is performed, it takes time for the operation, the operation itself is complicated, and it is not possible to avoid the drawback that the manual operation is always required.

The present invention has been made in view of the above, and enables a plurality of types of cassettes to be selectively loaded via a guide member that expands and contracts, automatically removes an exposed film from the cassette, and stores the exposed film in a magazine. Or when the cassette is once loaded, the guide member is held in a locked state, and the stability and reliability of the film unloading operation can be ensured. It is an object to provide a cassette loading device.

Means for Solving the Problems In order to solve the above problems, the present invention provides a fixed guide member provided on one side and a cassette provided on the other side, along the cassette loading direction. A movable guide member that can be displaced to change the distance between the fixed guide member and the fixed guide member according to the size of the movable guide member. The movable guide member is rotated by the pressing action of the cassette inserted into the cassette and retracts from the insertion space of the cassette, and engages with an engagement portion provided on the main body side according to the size of the cassette. And a lock member for setting a lock state in which displacement is impossible.

[Operation] According to the present invention, when the cassette is inserted along a set of guide members, the displacement of the movable guide member is regulated via the lock member by the pressing action of the cassette. As a result, the film can be fed stably and reliably to the next transport system.

[Embodiment] Next, a preferred embodiment of a cassette loading apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 2, reference numeral 2 indicates an apparatus incorporating a cassette loading mechanism according to the present invention. The apparatus 2 has a film cassette loading mechanism 4 therein, a transport system 6 for transporting the exposed film taken out of the film cassette loading mechanism 4, and is further fed through the transport system 6. A magazine mounting mechanism 8 for inserting a magazine in which films are stacked and stored.

Therefore, the film cassette loading mechanism 4 will be described in detail. The device 2 includes a vertically long housing 10, an opening 12 for inserting a cassette CS on an upper side thereof, and a lever member 14 which is displaceably protruded into the inside for operating the lever member 14 from the outside. A narrow opening 16 is defined. A U-shaped displacement member 17 which is open downward and is connected to the tip of the lever member 14. A plate 18 is vertically provided inside the housing 10 and close to the opening 12, and an opening 20 defined by the plate 18 can be opened and closed by a shutter member 22. A bracket 24 is provided on the shutter member 22, and a pin member 26 protrudes from the bracket 24. The pin member 26 faces a hole 27a of a bending arm-shaped shutter opening member 27 pivotally supported by a side plate 28b described later.

A set of vertically extending side plates is located above the inside of the housing 10.
28a and 28b are provided, and a cassette holder 30 is mounted inside the pair of side plates 28a and 28b. As shown in FIG. 3, the cassette holder 30 actually includes a plate 32 whose both ends are bent upward. The plate 32 has an opening 34 and an opening 36 which are separated from each other and greatly open. And are drilled. Further, a long hole 38 is formed near the opening 34 in the vicinity of one longitudinal end of the plate 32. A bending attachment member 40 is provided at one end of the plate 32, and pin members 42a and 42b are formed outside the both ends of the attachment member 40 so as to project at predetermined intervals. A roller member 44 is provided at an end of the pin member 42a. The inside of the mounting member 40 is formed in a U-shape, so that a fixed guide member 48 in which a guide groove 46 is defined is provided.

A different mounting member 50 is integrally provided on the plate body 32 on the side opposite to the mounting member 40, and the mounting member 50 includes a pin member.
Pin members 52a and 52b are provided corresponding to 42a and 42b, respectively. A roller member 54 is rotatably attached to the pin member 52a. In this case, the pin members 42a and 42b engage with the bent long holes 56a and the straight long holes 56b formed on the side plate 28a, respectively, while the pin members 52a and 52b are bent on the side plate 28b. And a straight long hole 58b.

Next, a pin member 60 is formed to project from the upper surface of the plate 32,
A pin member 62 is further formed protruding near the pin member 60. One end of a coil spring 64 is engaged with the pin member 60, and the other end of the coil spring 64 is moved upward from a plate 66 disposed inside the lower portion of the plate 32 through a long hole 38. It is engaged with the protruding pin member 68. The plate 66 is separated from the pin member 68 by a predetermined distance and similarly has a long hole 38.
A different pin member 70 extending upward from is implanted.

A movable guide member 74 defining a guide groove 72 is fixed to a portion of the plate 66 that is bent and extends downward. A pin member 76 protrudes from the upper end of the movable guide member 74, and a locking claw (lock member) 78 is pivotally supported by the pin member 76 (see FIG. 4). Accordingly, as will be described later, if a cassette is inserted between the fixed guide member 48 and the movable guide member 74 via the guide grooves 46 and 72, the end of the cassette on the guide groove 72 side locks the locking claw 78. Rotate to displace it upward. The tip of this locking claw 78 is a plate
It penetrates a hole (not shown) 66 and engages with a locking hole (engaging portion) 80 defined in the plate 32. Accordingly, the movable guide member 74 is prevented from further moving in the longitudinal direction in FIG. 3 under the action of the locking claw 78.

An angle member 82 is further formed on the plate 66 so as to project upward, and a roller 84 is pivotally supported by the angle member 82 so as to be rotatable. The rollers 84 can roll on the plate 32. A long hole 86 is formed in the plate body 66 in the longitudinal direction, that is, in a direction orthogonal to the long hole 38, and a pin is inserted in the long hole 86.
88 extends upward through the pin 88, one end of a coil spring 90 is engaged with the tip of the pin 88, and the other end of the coil spring 90 is locked by a pin 70 member. I have.

Further, a cassette displacement restricting member 81 is provided on the plate 32 near the pin members 60 and 68. The cassette displacement restricting member 81 has bending portions 83a and 83b defining a space opened downward at both ends of the bending thereof, and elongated holes 85a and 85b are formed in the longitudinal direction thereof. . These long holes 85a, 8
The axes of the columnar collar members 87a and 87b extend downward through 5b.

On the other hand, as shown in FIG. 4, the pin 88 extends downward from the elongated hole 86, and its tip end is engaged with a plate 92 bent downward and extended. This plate 92 holds a sensor actuator 94 and one unlock pin 96. The sensor actuator 94 has a notch on the way in the longitudinal direction.
The coil spring 98 is engaged with one end of the plate body 92, and the other end of the coil spring 98 is engaged with one end of the plate 92.

In connection with the actuator 94, the plate 66 has a sensor
102 is attached. In fact, this sensor 102 consists of a photo interrupter. From the elongated hole 86, the collar 100 that engages with the cassette displacement regulating member 81 is further exposed upward.

A plate 104 faces the opening 36 of the plate 32, and a long hole 106 is further formed in the plate 104. A pin 108 similar to the pin 88 penetrates the elongated hole 106. The pin 108 suspends the coil spring 110 between the pin 108 and the pin member 62. Pin 108
Although not shown, holds a plate similar to the plate 92, and this plate holds a collar 111 similar to the collar 100 and the other unlock pin 112.

In the drawing, reference numeral 114 denotes a bending member which is opposite to the angle member 82 and is fixed to the plate 66, and a rotatable roller 116 is pivotally supported at the tip of the bending member 114. .

Next, the side plates 28a and 28b will be described. Side plates 28a, 28b
Are formed with relatively short inclined long holes 130a, 130b below the long holes 56a, 58a, respectively. These long holes 130a, 130b
An unlocking bar member 140 is bridged between the two. Actually, an arm member 142 is rotatably supported at one end of the unlocking bar member 140, and a long groove 144 is defined at the other end of the arm member 142 along the longitudinal direction thereof ( (See FIG. 5). An unlocking link member 146 faces the long groove 144, and the unlocking link member 146 has its shaft.
A pin member 150 is implanted eccentrically from 148. A roller member 152 is further locked to the pin member 150.
The roller member 152 is always pulled toward the bar member 140 by a tension spring 156 whose one end is locked to a pin member 154 implanted in the arm member 142. The link member 146 has a sprocket 158 coaxially, and an idle sprocket 160 is disposed near the sprocket 158. Also, a sprocket 1 is provided below the arm member 142.
The sprocket 165, the sprocket 162, and the sprocket 15
8. A chain 166 is suspended between the idle sprockets 160. A link 170 is pivotally supported on a shaft 168 of the sprocket 162, and a roller 174 is rotatably mounted on the link 170. Therefore, it can be easily understood that rotation of the motor 164 causes rotation of the sprocket 165, and rotation of the sprocket 165 leads to rotation of the sprocket 158, the sprocket 162, and the idle sprocket 160 via the chain 166.

Incidentally, as can be easily understood from FIG. 2, the roller 174 is outwardly moved from the lid closing plate 180 of the cassette CS whose one end is pivotally supported near the lower part of the unlocking bar member 140. And is engaged with a flange 180a extending to the side. Therefore, if the link 170 rotates, the cover closing plate 180 can be rotated under the action of the roller 174.

In addition, a rotation drive source 181 is provided near the side plate 28a,
The gear 182 supported by the drive shaft of the rotary drive source 181
183 mesh. The gear 183 further includes a driving fork member 18
4 engages with the tooth portion 184a engraved on the semicircular portion. Although not shown, the shaft 185 that supports the driving fork member 184 extends toward the side plate 28b, and supports another driving fork member (not shown). The drive fork member 184
And two forks 187a of other driving fork members,
187b sandwiches the pin members 42a and 52a (see FIG. 3).

Next, the cover member closing plate 180 of the cassette, on the other hand, is for guiding the film led out from the shutter downward when in the open state, and in this open state, the closing plate 180 is closed. The guide member 200 faces the distal end portion so as to swing freely. As shown in FIG. 6, the tip of the guide member 200 is actually a plurality of comb teeth 201a to 201a.
01i facing the plate 201 and its comb teeth 201a to 201
It has comb teeth 200a to 200j that mesh with 1j. One end of the guide member 200 is rotatable by a shaft member 202. One end of the guide member 200 rises, and a receiving member 205 of the closing plate 180 is provided at the tip thereof. A deformed pentagonal rotating member 204 is engaged with the back surface on the other end side of the guide member 200, and the rotating member 204 is rotated by a motor 207. The rotating member 204 has a curved portion 204a and an obtuse angle portion 204.
b, a flat portion 204c and the like, and when the rotating member 204 is rotated, the curved portion 204a and the obtuse angle portion 204b respectively come into contact with the back surface of the guide member 200 with impact or smoothly. With this, the guide member 200 slowly or rapidly displaces the upper end portion according to the contact state,
As described later, the falling film can be aligned with the plate 201. And the flat part 20
At 4c, the guide member 200 descends to disengage the comb teeth 201a to 201i and the comb teeth 200a to 200j of the plate 201, thereby defining a space where the film can be dropped.

Therefore, the leading end of the guide member 200 faces the transport system 6.
The transport system 6 includes first roller groups 206a, 206b, 206c, and 206d;
The second roller group 208a, 208b, 208c and the third roller group 21
0a, 210b, and 210c. As shown, a belt is suspended from each roller group. A guide member 212 that faces further upward faces the roller 206d. In this case, the leading end of the guide member 212 is a roller 210a and a roller 206d.
Facing the contact part of Further, a roller pair 214 faces the tip of the roller 206c and the roller 210b. The roller pair 214 faces the magazine mounting mechanism 8. In this case, the guide member 21
2 is formed by bending the flat portion 212a and the inclined surface portion 212b.
The flat portion 212a may be used to guide a narrow-sized film, and the wide-sized film may be guided over the flat portion 212a and the inclined surface portion 212b. In the case of a film having a small width, a rising portion for forming the inclined surface portion 212b acts to guide the end of the film.

Next, the magazine mounting mechanism 8 will be described. The magazine mounting mechanism 8 is configured to mount the magazine MZ substantially using the concave portion 250 defined on one side surface of the housing 10. That is, an opening 252 is defined at the bottom of the concave portion 250 of the housing 10, and a casing-like magazine holding member 254 is inclined from the opening 252 toward the inside. A bending support plate 256 is mounted on an upper portion of the magazine holding member 254, and a rising portion 256a of the support plate 256 is provided.
An elongated hole 258 is formed so as to be orthogonal to the magazine insertion direction. As shown in FIG. 7, a roller 260 is fitted into the elongated hole 258, and a lever member bent to the roller 260 is fitted.
262 is installed. A round bar-shaped guide member 261 is bridged to the bent portion of the lever member 262 in the vertical direction. The coil spring 263 is wound around the guide member 261 in advance. In fact, the coil spring 263 has a U-shaped groove 265
The swinging member 265 defining a is engaged with the swinging member 265.
Is swingable by a link mechanism 269 connected to the motor 267. A pin 264 is implanted in the vicinity of the bent portion of the lever member 262, and the pin 266 is slightly displaced below the pin 264.

As can be easily understood from the drawing, the pin 266 pivotally supports a film feed member 268 having a circular radius, and one end of the film feed member 268 is provided with a pin spring 271 for the coil spring 270. One end is engaged and the other end of the coil spring 270 is engaged with the pin 264.
Therefore, the film feeding member 268 in which the friction member 272 made of synthetic rubber or the like is mounted on the curved surface is always given a downward force by the coil spring 270 with one end as a fulcrum. In this case, as can be easily understood from the drawing, the leading end of the semicircular film feeding member 268 always extends below the bent end 262a of the lever member 262 by the distance d (the seventh position). See figure).

The device according to the present invention is basically configured as described above, and its operation and effect will be described next.

First, an operation of loading cassettes CS of different sizes in the vertical and horizontal dimensions into the apparatus 2 and automatically discharging the cassettes will be described. For example, when a large-sized cassette CS is to be inserted, the lever member 14 is displaced so that a hole defined in the housing 10 in advance matches the size of the cassette CS. The displacement force of the lever member 14 is transmitted to a displacement member 17 having a U-shaped cross section. Since the displacement member 17 is engaged with the roller 116, the displacement member 17 displaces the plate 66, and accordingly, the movable guide member
74 is displaced, and a space for inserting the desired cassette CS can be obtained. At this time, the rollers 84 pivotally supported by the angle members 82 roll on the plate 32 to facilitate the displacement of the plate 66, and the collars 100 and 111 are bent portions 83a of the cassette displacement regulating member 81, Exit from 83b. The distal end of the cassette displacement restricting member 81 is pressed by the pin member 68, so that the cassette displacement restricting member 81 is laterally displaced. Therefore, the pin member 70 and the pin member 68 move along the long hole 38. That is, the movable guide member 74 is positioned with respect to the fixed guide member 48 by the lever member 14, and the cassette CS in which the exposed film is loaded in the guide groove 46 of the fixed guide member 48 and the guide groove 72 of the movable guide member 74. Can be introduced. Of course, when the space between the fixed guide member 48 and the movable guide member 74 is obtained at a desired position in advance with respect to the cassette CS, it is not necessary to displace the lever member 14 by an external operation.

Therefore, the user takes out the large-sized cassette CS and tries to insert it into the housing 10 through the opening 12.
First, the leading end of the cassette CS pushes up the shutter member 22 so that the shutter opening member 27 is
The cassette CS is displaced slightly upward under the action of the pin member 26 protruding from the lid of the cassette 24.
46 and the guide groove 74 of the movable guide member 74 can be inserted. At this time, the locking claw 78 is pushed up to the tip of the cassette CS, but after the movable guide member 74 is displaced, there is no hole corresponding to the locking hole 80 in the plate 32, so that the locking claw 78 has this size. The cassette is not locked. In particular, because the displacement of the movable guide member 74 is regulated by the mounting member 50, the locked state is not required. Furthermore, if the cassette CS is inserted, the cassette CS
Presses the tip of the bending sensor actuator 94. Therefore, the sensor actuator 94
Is displaced in the direction of the arrow in FIG. 4 against the tensile force of the coil spring 98. The sensor 102 is substantially composed of a photo interrupter, and the notch 95 of the sensor actuator 94 is moved by the pressing force of the cassette CS.
After passing through, a predetermined portion of the sensor actuator 94 prevents transmission of light in the photointerrupter constituting the sensor 102.

Then, a signal from the sensor 102 is sent to a rotary drive source 181 fixed to the side plate 28a, and the rotary drive source 181 is driven. The gear 182 mounted on the rotary drive shaft of the rotary drive source 181 rotates by this, and its rotational force is
The drive fork member 184 is rotated via the 83.
This rotational force is transmitted to the driving fork member on the mounting member 50 side via the shaft 185. The driving fork member 184 is attached to the mounting members 40, 50 by a pair of forks 187a and 187b.
Is forcibly displaced below the slots 56a and 56b. Therefore, it can be easily understood that the cassette CS held between the fixed guide member 48 and the movable guide member 74 also similarly moves downward. At this time, the pin member 42
b and 52b merely displace the slots 56b and 58b, respectively, in a straight line.

Next, the elongated hole 56a is formed by the driving fork member 184.
Cassette holder 3 displaced downward toward the bent end of 58a
0 is the motor 1 according to the drive signal from the sensor (not shown).
Energize 64. The rotation of the motor 164 causes the chain 166 to rotate via the sprocket 165, and as a result, the sprocket 162, the sprocket 158 and the sprocket 160
, And further rotate the link member 146 provided coaxially with the sprocket 158. Therefore,
The pin member 1 provided eccentrically on the link member 146
50 rotates and the arm member 142 is unlocked by the bar member 140
Is slightly displaced about the axis, and displaced toward the opening end of the long groove 144.

At this time, the roller member 152 pivotally supported by the pin member 150 pulls the tension spring 156, whereby the arm member 142 is displaced in the direction of the arrow. That is, the long holes 130a, 1
The unlocking bar member 140 interposed in 30b is displaced integrally with the arm member 142, and eventually, the bar member 140 presses the tail end of the cassette CS, and firmly holds the cassette CS.

At this time, the unlock pin 96 (112) is inserted into the through holes CSa and CSb provided on the body side of the cassette CS, and the lock members CSa 'and CS provided on the cover member CSc side of the cassette CS.
Press b '. As a result, the cassette CS is unlocked (see FIG. 8). At that time, sprocket 16
Since the cassette lid lifting link 170 pivotally attached to the second shaft 168 is displaced in a downward direction, the lid closing plate 180 abutting on the roller 174 is centered on one end supported by the shaft. It rotates and performs a descending operation. As a result, cassette CS
The lid member CSc is tilted at the same angle as the tilt angle of the lid closing plate 180 to open the cassette CS itself. Therefore, the film in the cassette CS falls toward the guide member 200 by its own weight. The displacement of the cover closing plate 180 is prevented by the receiving member 205 of the guide member 200.

Then, the film dropped from the closing plate 180 reaches the upper surface of the guide member 200, and the leading end of the film contacts the plate 201 with which the comb teeth mesh with each other. At this time, the rotating member 204 supported by the rotating shaft of the motor 207 has a longest part from its center, that is, the curved part 204a is a guide member.
It is in contact with the back of 200. Then, the rotating member 204 performs a rotating operation under the driving action of the motor 207, and changes the contact portion of the guide member 200 from the curved portion 204a to the obtuse angle portion 204b.
When c is brought into contact with the back surface of the guide member 200, the guide member 200
Reaches the lowest position. That is, the distal end portions of the guide member 200 and the plate 201 are slightly separated from each other. The guide member 200 performs an oscillating operation by these portions, whereby the film positions its leading end with respect to the plate 201.

Then, the transport system 6 is energized. First roller group 206a
The film is pinched and conveyed by the belts of Nos. 206d and the belts of the second roller groups 208a to 208c, and reaches the guide member 212 side. At this time, the guide member 212 has a flat portion 212a
Since a step is formed between the guide member 212 and the inclined surface 212b, in the case of a large size depending on the size, the sheet is placed on the guide member 212 over this step. In the case of a small-sized film, the film is placed on a flat portion 212a below the step of the guide member 212. Here, it is important that the film is turned upside down. It is to become. Therefore, the guide member 21
The film derived from the second roller group 206
The sheet is fed to the roller pair 214 while being sandwiched between the belts a to 206d and the belts of the third roller groups 210a to 210c. At this time, the magazine holding member 254 already has the magazine M
With the Z inserted, the opening below the magazine MZ remains open enough to receive the film.

Then, the motor 267 is energized, the swinging member 265 descends under the action of the link mechanism 269, and the roller 260 in the long hole 258 of the support plate 256 performs a displacement operation in the downward direction, and the fed film is sent. Is in contact with the curved surface of the film feeding member 268.
Further, when the roller 260 is displaced downward against the resilience of the coil spring 263 under the action of the motor 267, the film hits the bottom of the magazine MZ or the film already stacked. At this time, the film feed member 26
8 has its one end pulled and held by the coil spring 270, so that when the film feed member 268 comes into contact with the film under the displacing action of the lever member 262, the pin 266 is pressed.
The feed member 268 rotates in the direction of the arrow about the center. That is, the reaction force generated by the pressing force against the film causes the film feed member 268 to move the coil spring 2
The film is displaced in the direction of the arrow against the pulling force of 70, and the curved tip portion 268a is converted into an operation of feeding the film above the magazine MZ. And this feed member 26
The film is pressed into the magazine by the end 8 and the end 262a of the lever member 262.

By repeating these operations, the magazine MZ
An exposed film to be laminated is stored in the inside. After the desired amount of film is stacked, the magazine MZ
It is taken out in a light-shielded state by 252.

By the way, after the film is taken out of the cassette CS by the above operation, the cassette itself must also be discharged from the housing 10. This discharge is automatic. That is, the film is taken out of the cassette CS and transferred to the guide member 200, so that the motor 164 is driven again. This links 170
Is rotated, and the roller 174 mounted on the distal end of the link 170 causes the flange 180a of the closing plate 180 to rotate upward. Finally, the lid CSc is pushed into the cassette CS. At this time, the sprocket 162, the sprocket 158, and the idle sprocket 160 also rotate under the rotation of the chain 166, and the roller member 152 attempts to return to the original position. That is, the extension spring 156 is displaced in the extension direction, and as a result, the arm member 142 also displaces in the original position direction. The displacement operation of the arm member 142 causes the unlocking bar member 140 to move through the elongated hole 13.
Return to the original position within the range of 0a and 130b. Therefore, the end portion of the cassette CS, which has been firmly held by the unlocking bar member 142, can be sufficiently displaced.

Then, the rotation drive source 181 rotates in the opposite direction, and the gear 18
The driving fork member 184 rotates in the direction opposite to the above via the 183. Accordingly, the cassette holder 30 is inserted into the slots 56a, 58a via the pin members 42a, 52a and the pin members 42b, 52b.
Also, 56b and 58b are displaced, and displaced toward the opening 12. At this time, the roller members 44, 54 provided on the pin members 42a, 52a respectively push up the bent portions of the shutter opening member 27, and the shutter opening member 27 is displaced upward about one end supported by the shaft. Perform the operation.
As a result, the pin member 26 engaged with the tip of the shutter opening member 27 opens the shutter member 22 by the bracket 24. If the driving fork member 184 rotates and the cassette holder 30 is displaced toward the opening 12 through the elongated holes 56a, 58a and 56b, 58b in FIG. Can be taken out.

The above is the basic operation of the film cassette loading mechanism 4 according to the present invention. Next, when the cassette itself has a different size, that is, when the cassette is smaller in size than the above-described embodiment, the process of loading the cassette is described. This will be described below.

First, the lever member 14 is displaced by an external operation, and the movable guide member 74 approaches the fixed guide member 48,
Match the size of the cassette CS to be inserted. That is the position shown by the solid line in FIG. Such a displacement operation of the lever member 14 also displaces the plate body 66 integrated with the movable guide member 74.

At this time, the pin member is
68 is displaced together with the pin member 70, and the coil spring
90 pulls the pin 88, and similarly, under the tension of the coil spring 110, the pin 108 also reaches the position shown in FIG.
Further, since the cassette displacement regulating member 81 is also displaced,
The collars 100 and 111 attached to the 66 and 104 respectively enter the inside of the bent portions 83a and 83b of the cassette displacement restricting member 81, and are prevented from moving further. At this time, the unlock pin 96 (112) provided on the plate 92 releases the locked state of the small size cassette.

Therefore, when the cassette CS is inserted through the opening 12 in the same manner as described above, the locking claw 78 which is in a falling state by its own weight rises around the pin member 76 so that the tip of the locking hole 80 faces the locking hole 80. Thereby, the movable guide member 74, the plate bodies 66, 10
4 is fixedly positioned, and the procedure shifts to the cassette opening operation. Subsequent steps are the same as in the above embodiment.

[Effects of the Invention] According to the present invention, a plurality of types of cassettes having different sizes can be selectively loaded into an apparatus by freely changing the distance between a fixed guide member and a movable guide member. it can.

Further, the movable guide member can be locked at a predetermined position corresponding to the size of the cassette by the lock member. Therefore, the movable guide member can be reliably locked at a predetermined position corresponding to the size of the cassette by a very simple mechanism called a lock member, and the film taking-out operation can be stabilized. Furthermore, the number of parts can be reduced and it can be manufactured at low cost.
It is possible to reduce the size of the entire device.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of a mammography photographing apparatus related to the present invention, FIG. 2 is a schematic longitudinal sectional view of an apparatus incorporating a cassette loading apparatus of the present invention, and FIG. 3 is a partly omitted cassette holder according to the present invention. FIG. 4 is a longitudinal sectional explanatory view of a cassette holder according to the present invention partially omitted, FIG. 5 is a perspective explanatory view partially omitted of an unlocking mechanism in an apparatus according to the present invention, and FIG. FIG. 7 is a perspective explanatory view of a film guide plate according to the present invention, FIG. 7 is a partially omitted perspective explanatory view of a magazine mounting mechanism according to the present invention, and FIG. 8 is a perspective explanatory view of a cassette. 4 cassette loading mechanism 6 transport system 8 magazine mounting mechanism 14 lever member 22 shutter member 27 shutter opening member 30 cassette holder 48 fixed guide member 74 Movable guide member, 78 Locking claw 81 Cassette displacement restricting member 94 Sensor actuator 96 Unlock pin 102 Sensor 140 Unlock bar member 180 Lid closing plate 184: Drive fork member 200, 212: Guide member, 204: Rotating member 254: Magazine holder, 256: Support plate 262: Lever member, 265: Swing member 268: Film feed member

Claims (1)

(57) [Claims] 1. A method for changing the distance between a fixed guide member provided on one side and a fixed guide member provided on the other side in accordance with the size of a cassette along the cassette loading direction. A set of guide members comprising a movable guide member that can be displaced; and an insertion of the cassette that is pivotally supported by the movable guide member and is rotated by a pressing action of a cassette inserted between the set of guide members. A locking member that retreats from a space and engages with an engaging portion provided on the main body side according to the size of the cassette, so as to lock the movable guide member in a non-displaceable locked state. Cassette loading device.