JPH0389244A - Unlock mechanism for cassette - Google Patents

Abstract

PURPOSE:To obtain the unlock mechanism which hardly fails by displacing an unlock means according to the position of a lock means for the cassette according to the size of the cassette. CONSTITUTION:When the cassette itself is of differing size, a lever part 14 is displaced through external operation to move a movable member 74 to a fixed member 48 and match it with the size of a cassette CS to be inserted next. A plate body 66 integrated with a movable guide member 74 is also displaced through the displacing operation of the lever member 14. Further, a cassette displacement control member 81 is also displaced, so collars 100 and 111 mounted on the plate bodies 66 and 104 enter deflection parts 83a and 83b of the control member 81 to inhibit further movement. When the cassette CS is inserted into an opening 12, a locking claw 78 in a gravitational fall state is elevated around a pin member 76 to have its front end part opposite a locking hole part 80, so that the movable guide member 74 and plate bodies 66 and 104 are fixed and positioned. Thus, cassettes of varying sizes can be handled by the single device.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a system for properly positioning an unlocking means corresponding to the locked position of cassettes of various sizes equipped with a locking mechanism, and locking the cassettes. The present invention relates to a cassette unlocking mechanism that allows automatic opening of the lid.

[Prior Art] Conventionally, a cassette that maintains a film exposed to an X-ray image in a light-shielded state is loaded into a predetermined device, and after loading the exposed film in the cassette into a magazine, the cassette is A structure that allows the device to be taken out from the device is adopted.

For example, this type of device has become widely adopted in connection with mammography imaging devices.

Therefore, the relationship with this mammography imaging apparatus will be schematically explained with reference to FIG.

Films a, which are stacked and housed in a package, are loaded into a magazine b in a bright room, and this is mounted on a loading device C. Meanwhile, an empty flat cassette d is inserted into the loading device C. In this case, if the laminated films a have different sizes, for example, the laminated film a' is loaded into the magazine b' in a bright room, and the magazine b' and the magazine b' are loaded into the loading device C'. An empty cassette d' is then inserted. For example, in the loading device C, an unexposed film is transferred from the magazine b into the cassette d via a sheet feeding mechanism (not shown), and the cassette d is taken out while keeping the film in a light-shielded state. . This type of flat cassette d is then used for imaging in a mammography imaging apparatus e to check whether a waiting woman has breast cancer or the like.

Thereafter, the cassette f containing the exposed film is loaded into the cassette loading/unloading device g1 which is provided with an automatic processor in parallel, or into the cassette loading/unloading device which does not have an automatic processor, that is, exists independently. A plurality of sheets are stacked and stored in the magazine i via. The film in this magazine i is then fed to an automatic processor, as described above, to obtain a developed X-ray photograph.

[Problems to be Solved by the Invention] However, as described above, when trying to take out films from cassettes of various sizes, it is necessary to individually unlock the locking means provided in each cassette to maintain a light-shielding state. There must be. For this reason, the device must have unlocking means corresponding to the position of the locking means of each cassette. However, for cassettes with different vertical and horizontal dimensions, arranging a plurality of unlocking means corresponding to the position of the locking means has the disadvantage that the structure becomes extremely complicated and the device itself becomes large. .

Therefore, in reality, for a cassette of one size,
It has been pointed out that this method requires a unique device, and that when using cassettes of different sizes, there is no other choice but to prepare a device that matches the size.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention includes a set of guide members whose openings can be enlarged and contracted according to the size of the cassette, and a set of guide members that are displaceable. a first displacement means for causing the locking mechanism of the cassette held by the guide member of the lever to face the unlocking means; and a first displacement means for displacing the unlocking means according to the position of the locking mechanism of the cassette which varies depending on the size of the cassette. and a second displacement means for causing the displacement.

[Operation] In the above configuration, when the distance between the pair of guide members is adjusted according to the size of the cassette, the cassette unlocking means is also displaced at the same time due to this distance adjustment, and then When the cassette is inserted and the guide member is displaced, the locking means of the cassette faces the unlocking means.

Therefore, since the unlocking means is displaced according to the size of the cassette, in other words, according to the position of the locking means of the cassette, even when cassettes of various sizes exist, it can be handled with a single device, which is economical. It is. Moreover, it has a simple structure and does not require much space.

[Embodiments] Next, the cassette unlocking mechanism according to the present invention will be described in detail below with reference to the accompanying drawings, citing preferred embodiments in relation to a device in which it is incorporated.

In FIG. 2, reference numeral 2 designates a device incorporating a cassette unlocking mechanism according to the present invention. The device 2 includes a film cassette loading/unloading mechanism 4, a transport system 6 for transporting the exposed film taken out from the film cassette loading/unloading mechanism 4, and a transport system 6 for transporting the exposed film. The storage device includes a magazine mounting mechanism 8 for inserting a magazine that stores stacked films.

First, the film cassette loading/unloading mechanism 4 will be described in detail. The device 2 includes a vertically elongated housing lO,
Opening 1 for inserting cassette C8 in its upper side
2 and a narrow opening 16 into which the lever member 14 can be displaced to operate it from the outside. At the tip of the lever member 14, there is a U-shaped displacement member 1 that is open and directed downward.
7 are connected. A plate member 18 is vertically provided inside the housing 10 and close to the opening 12, and the opening 20 defined by the plate member 18 can be opened and closed by a shutter member 22. A bracket 24 is disposed on the shutter member 22, and a bin member 26 is protruded from the bracket 24. The pin member 26 is attached to the side plate 2 which will be described later.
It faces the hole 27H of the bending arm-shaped shutter opening member 27 pivotally supported by the shaft 8b.

A pair of vertically extending side plates 28a and 28b are provided inside and above the housing 10, and these side plates 28a,
A cassette holder 30 is mounted inside 28b.

As shown in FIG. 3, the cassette holder 30 actually includes a plate body 32 whose both ends are bent upward.
2 is provided with an opening 34 and an opening 36 that are spaced apart from each other and widen widely. Furthermore, the opening 3
4, a long hole 3 is provided near one longitudinal end of the plate 32.
8 is drilled. A bendable mounting member 40 is provided at one end of the plate 32, and pin members 42a and 42b are formed protruding from both ends of the mounting member 40 at a predetermined distance apart. A roller member 4 is attached to the end of the pin member 42a.
Set 4. Note that the inside of the mounting member 40 is formed in a U-shape, and is therefore provided with a fixed guide member 48 in which a guide groove 46 is defined.

A different mounting member 50 is integrally provided on the opposite side of the mounting member 40 on the plate body 32, and this mounting member 50 has a bottle member 52a, corresponding to the pin members 42a, 42b, respectively.
52b is provided. A roller member 54 is rotatably attached to the pin member 52a. In this case, the pin members 42a and 42b engage with a bent long hole 56a and a straight long hole 56b drilled in the side plate 28a, respectively, while the pin members 52a152b engage in a bent long hole 56a drilled in the side plate 28b. It engages with the hole 58a and the straight long hole 58b, respectively.

Next, a pin member 60 is formed to protrude from the upper surface of the plate body 32, and a pin member 62 is further formed to protrude near this pin member 60. One end of a coil spring 64 is engaged with the pin member 60, and the coil spring 64
The other end engages with a pin member 68 that protrudes upward from a plate 66 disposed inside the lower portion of the plate 32 through an elongated hole 38 . A different pin member 70 is implanted in the plate body 66 and is spaced apart from the pin member 68 by a predetermined distance and similarly extends upward from the elongated hole 38 .

A guide groove 72 is formed in the bent and downwardly extending portion of the plate body 66.
A movable guide member 74 is fixed thereto. In addition,
A pin member 76 is provided at the upper end of this movable guide member 74.
A locking pawl 78 is rotatably supported on the bottle member 76 (see FIG. 4). Therefore, as will be described later, if the cassette is inserted between the fixed guide member 48 and the movable guide member 74 via the guide groove 46.72,
The end of the cassette on the guide groove 72 side rotates the locking pawl 78 and displaces it upward. The tip of this locking pawl 78 passes through a hole (not shown) in the plate 66 and is inserted into the plate 3.
The locking hole 80 defined in the locking hole 80 is engaged with the locking hole 80 defined in the opening 2. Therefore,
The movable guide member 74 is prevented from further movement in the longitudinal direction in FIG. 3 under the action of the locking pawl 78.

An angle member 82 is further formed to project upwardly on the plate body 66, and a roller 84 is rotatably supported on the angle member 82. The roller 84 is movable on the plate 32. A long hole 86 is bored in the plate body 66 in its longitudinal direction, that is, in a direction perpendicular to the long hole 38 , and a bottle 88 extends upward through the long hole 86 . One end of a coil spring 90 is engaged with the tip of the coil spring 90, and the other end of the coil spring 90 is engaged with a pin 70 member.

Further, in the plate body 32, in proximity to the pin member 60.68,
A cassette displacement regulating member 81 is provided. The cassette displacement regulating member 81 has bent portions 83a and 83b defining a downwardly open space at both bent ends thereof, and elongated holes 85a and 85b are bored along the longitudinal direction thereof. . The axes of columnar collar members 87a, 87b extend downward through the long holes 85a, 85b.

On the other hand, as shown in FIG. 4, the pin 88 extends downward from the elongated hole 86, and its tip is engaged with a plate 92 that extends downward. This plate body 92 holds a sensor actuator 94 and one unlock bin 96. The sensor actuator 94 has a notch 95 in the longitudinal direction, and a coil spring 98 is engaged with one end of the cutout 95, and the other end of the coil spring 98 is engaged with one end of the plate 92. ing.

A sensor 102 is mounted on the plate 66 in relation to the actuator 94 . In fact, this sensor 102 consists of a photoinkrata. A collar 100 that engages with the cassette displacement regulating member 81 is further exposed upward from the elongated hole 86 .

A plate 104 faces the opening 36 of the plate 32, and a long hole 106 is further bored in the plate 104.

A pin 108 similar to pin 88 passes through the elongated hole 106 . The coil spring 110 is suspended between the pin 108 and the pin member 62. Although not shown, the pin 108 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 figure, reference numeral 114 indicates a bending member fixed to the plate 66 on the opposite side of the angle member 82, and a rotatable roller 116 is provided at the tip of this bending member 114.
is supported.

Next, the side plates 28a and 28b will be explained. Side plate 28
Relatively short oblique long holes 130a and 130b are formed in holes 130a and 28b below the long holes 56a and 58a, respectively. An unlocking lever member 140 is bridged between the elongated holes 130a and 130b. In fact, an arm member 142 is rotatably supported at one end of the unlocking bar member 140, and a long groove 144 is defined in the other end of the arm member 142 along its longitudinal direction. (5th
(see figure). An unlocking link member 146 faces this long groove 144, and a bottle member 150 is implanted in the unlocking link member 146 eccentrically from its axis 148. The pin member 150 further includes a roller member 152.
is locked. This roller member 152 is always in a state of being pulled toward the spring 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 coaxially has a sprocket 158, and an idle sprocket 160 is disposed near the sprocket 158. Further, a sprocket 162 is disposed below the arm member 142, and a chain 166 is suspended between the sprocket 165 pivotally supported by the rotational drive shaft of the motor 164, the sprocket 162, the sprocket 158, and the idle sprocket 160. There is. Note that the link 1 is attached to the shaft 168 of the sprocket 162.
70 is pivotally supported, and a roller 174 is rotatably mounted on this link 170. Therefore, it is easily understood that when the motor 164 rotates, the sprocket 165 rotates, and the rotation of the sprocket 165 rotates the sprocket 158, the sprocket 168, and the idle sprocket 160 via the chain 166.

By the way, as can be easily understood from FIG. 2, the roller 174 is removed from the cover closing plate 180 of the cassette C8, which has one end pivotally supported near the bottom of the unlocking member 140. flange 180a extending toward
is engaged with. Therefore, if the link 170 rotates,
Under the action of the roller 174, the lid closing plate 180
It is possible to rotate.

Note that a rotary drive source 181 is disposed close to the side plate 28a, and the gear 1 is pivotally supported by the drive shaft of this rotary drive source 181.
A gear 183 meshes with 82. The gear 183 further includes teeth 18 carved in a semicircular portion of the driving fork member 184.
It meshes with 4a. Although not shown, a shaft 185 that pivotally supports the driving fork member 184 extends toward the side plate 28b and supports another driving fork member (not shown). The driving fork member 184 and the two forks 187a and 187b of the other driving fork member sandwich the bottle members 42a and 52a (see FIG. 3).

Next, the lid member closing plate 180 of the cassette is, on the one hand, for guiding the film drawn out from the shutter downward when it is in the open state, and in this open state, the closing plate 180 is A guide member 200 swingably faces the tip. As shown in FIG. 6, the tip of the guide member 200 actually has a plurality of comb teeth 2.
Comb teeth 200a facing the plate 201 having numbers 01a to 2011 and meshing with the comb teeth 200a to 200J thereof
200j to 200j. And this guide member 200
One end portion of is rotatable by a shaft member 202. One end of the guide member 200 stands up, and a receiving member 205 for the closing plate 180 is provided at its tip. A deformed pentagonal rotating member 204 is engaged with the back surface of the other end of the guide member 200, and this rotating member 204 is connected to the motor 20.
Rotate by 7. The rotating member 204 has a curved portion 204a
, an obtuse angle portion 204b, a flat portion 204C, etc., and when this rotating member 204 is rotated, the curved portion 20
4a, the obtuse angle portion 204b contacts the back surface of the guide member 200 impactfully or smoothly. by this,
The guide member 200 displaces the upper tip slowly or rapidly depending on the contact condition, and as described later,
It becomes possible to align the falling film with the plate 201. Then, the guide member 200 descends at the flat portion 204c to disengage the comb teeth 201a to 2011 of the plate 201 and the comb teeth 200a to 200'', thereby defining a space in which the film can fall.

Therefore, the leading end of the guide member 200 faces the conveyance system 6.

The conveyance system 6 includes a first roller group 206a, 206b, 20
6c, 206d, and second roller group 208a, 20
8b.

208C, third roller group 210a, 210b,
210c. As shown in the figure, a belt is suspended from each roller group. Further, a guide member 212 facing upward faces the roller 206d. In this case, the tip of the guide member 212 faces the contact area between the roller 210a and the roller 206d. Furthermore, a roller pair 214 faces the tips of the roller 206C and the roller 210b. The roller pair 214 faces the magazine mounting mechanism 8.

In this case, the guide member 212 is bent and formed to have a flat part 212a and an inclined surface part 212b,
The flat portion 212a is used to guide a narrow size film, and the flat portion 212a is used to guide a wide size film.
It is also possible to perform the process over the slope part 212b and the slope part 212b. In the case of a narrow film, the rising part for controlling the inclined surface part 212b serves as a guide for the end of the film.

Next, this magazine mounting mechanism 8 will be explained. The magazine mounting mechanism 8 is configured to mount the magazine MZ substantially using a recess 250 defined in one side surface of the housing 10. 4, that is, the recess 2 of the housing 10
50 has an opening 252 at the bottom, and this opening 25
2 inwardly from the casing-shaped magazine holding member 254.
are arranged at an angle. A bending support plate 256 is attached to the upper part of the magazine holding member 254, and a long hole 258 is bored in a rising portion 256a of the support plate 256 so as to be orthogonal to the magazine insertion direction.

The long hole 258 has a roller 26 as shown in FIG.
0 is fitted and the lever member 2 bent to this roller 260
62 is installed. A round rod-shaped guide member 261 is bridged over the bent portion of the lever member 262, oriented in the vertical direction. The coil spring 26 is attached to this guide member 261.
Wrap 3 outward.

In fact, the coil spring 263 has a U-shaped groove 265a.
A swing member 265 is engaged with the swing member 265.
65 is swingable by a link mechanism 269 connected to a motor 267. A pin 264 is installed in the vicinity of the bent portion of the lever member 262, and a pin 266 is further provided projecting slightly displaced below the pin 264.

As can be easily understood from the figure, the pin 266 pivotally supports a semicircular film feeding member 268, and a coil spring I270 is connected to one end of the film feeding member 268 via a pin member 271. One end of the coil spring 270 is engaged, and the other end of the coil spring 270 is attached to the pin 2.
64. Therefore, the film feeding member 268, which has a friction member 272 made of synthetic leather rubber or the like attached to its curved surface, always uses the coil spring 272 with one end as a fulcrum.
70 provides a downwardly directed force.

In this case, as can be easily understood from the figure, the tip of the semicircular film feeding member 268 always extends a distance d downward from the bent end 262a of the lever member 262 (the (See Figure 7).

The device 2 incorporating the cassette unlocking mechanism according to the present invention is basically constructed as described above, and its operation and effects will be explained next.

First, the operation of loading cassettes C8 of different sizes in the vertical and horizontal dimensions into the device 2 and automatically ejecting them will be described. For example, when inserting a large-sized cassette C3, the lever member 14 is displaced so that the hole defined in the housing 10 in advance matches the size of the cassette C8.

The displacement force of this lever member 14 is the displacement member 1 having a U-shaped cross section.
7. Since the displacement member 17 is engaged with the roller 116, the plate 66 is displaced, and the movable guide member 74 is accordingly displaced, thereby making it possible to obtain a desired insertion space for the cassette C3. At this time, the roller 84 pivotally supported by the angle member 82 moves on the plate 32 to facilitate the displacement of the plate 66, and the bent parts 83a and 83b of the cassette displacement regulating member 81 are connected to the collars 100 and 111. Karanuki is out. The tip of the cassette displacement regulating member 81 causes the pin member 70 to move laterally. Therefore, the pin member 70 and the pin member 68 are connected to the elongated hole 38.
move along. 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 loaded with the exposed film is placed inside the guide groove 46 of the fixed guide member 48 and the guide groove 72 of the movable guide member 74. C3 can be introduced. Of course, when the distance between the fixed guide member 48 and the movable guide member 74 is already set at a desired position with respect to the cassette C3, it is not necessary to displace the lever member 14 by external operation.

Therefore, an attempt is made to take out the large cassette C5 and insert it into the housing 10 through the opening 12. First, the tip of the cassette C8 is connected to the shutter member 22.
As a result, the shutter opening member 27 is slightly displaced upward under the action of the pin member 26 protruding from the lid of the bracket 24, and the cassette C5 is moved between the guide groove 46 of the fixed guide member 48 and the movable guide. The member 740 can be inserted into the guide groove 72 . At this time, the locking pawl 78 is pushed up to the tip of the cassette C3, but after the movable guide member 74 is displaced, there is no hole corresponding to the locking hole 80 in the plate 32, so this size There is no lock on the cassette. In particular, this is because the displacement of the movable guide member 74 is regulated by the mounting member 50, so that the locked state is not necessary. moreover,
When the cassette C8 is inserted, the tip of the cassette C8 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 ink actuator, and the sensor actuator 94
After the notch 95 passes through the sensor 102 due to the pressing force of the cassette C3, a predetermined portion of the sensor actuator 94 blocks light from passing through the photo ink club that constitutes the sensor 102.

Therefore, the signal from the sensor 102 is sent to a rotary drive source 181 fixed to the side plate 28a, and this rotary drive source 181 is fixed to the side plate 28a.
81 is driven. The gear 182 attached to the rotational drive shaft 182 of the rotational drive source 181 is thereby rotated,
The rotational force rotates the driving fork member 184 via the next gear 183. This rotational force is transmitted to the driving fork member on the mounting member 50 side via the shaft 185.

This driving fork member 184 is a set of forks 187
a and 187b forcibly displace the cassette holder 30 including the mounting member 40.50 below the elongated holes 56a and 56b. Therefore, it is easily understood that the cassette C8 held between the fixed guide member 48 and the movable guide member 74 is similarly displaced downward. At this time, the pin members 42b and 52b have long holes 56b and 58b, respectively.
It is simply a straight displacement.

Next, the long hole 56 is opened by the driving fork member 184.
The cassette holder 30, which has been displaced downward toward the bent end portions 58a and 58a, energizes the motor 164 by a drive signal from a sensor (not shown).

This rotational action of motor 164 rotates chain 166 through sprocket 165, resulting in sprocket 162, sprocket 158, and sprocket 16.
0 and further rotates the link member 146 coaxially provided on the sprocket 158. Therefore, the pin member 150 eccentrically provided on the link member 146 rotates, slightly displacing the arm member 142 about the end of the unlocking bar member 140, and
44 toward the open end side.

At this time, the roller member 152 pivotally supported by the pin member 150 tensions the tension spring 156, thereby displacing the arm member 142 in the direction of the arrow. That is, the unlocking bar member 140 inserted in the elongated holes 130a and 130b is displaced together with the arm member 142, and eventually the bar member 140 presses the tail end of the cassette C8, and this Hold cassette C8 firmly.

At this time, unlock pin 96 (112) is connected to cassette C.
Through hole C3a provided on the main body side of 8.

C3b, and presses the locking members C3a' and csb' provided on the lid member C3c side of the cassette C3. As a result, the cassette C8 becomes unlocked (see FIG. 8).

At this time, since the link 170 for lifting the cassette lid, which is pivotally connected to the shaft 168 of the sprocket 162, is displaced downward, the lid closing plate 180, which comes into contact with the roller 174, is moved at one end that is pivotally supported. The lowering movement is performed by rotating around the lower part. As a result, the lid member C3 of the cassette C3
c is tilted at the same angle as the tilt angle of the lid closing plate 180 to open the cassette C8 itself. Therefore, the film in the cassette C8 falls toward the guide member 200 due to its own weight. Note that the displacement of the lid closing plate 180 is prevented by the receiving member 205 of the guide member 200.

Then, the film that has fallen from the closing plate 180 reaches the upper surface of the guide member 200, and its tip comes into contact with the plate 201 whose comb teeth mesh with each other. At this time, the rotating member 204 supported by the rotating shaft of the motor 207 has the longest part from its center, that is, the curved part 204
a is in contact with the back surface of the guide member 200. Therefore,
Next, the rotating member 204 performs a rotating operation under the driving action of the motor 207, and the obtuse-angled portion 2
04b to change the abutting part against the guide member 200,
Next, when the rotating member 204 brings the flat portion 204C into contact with the back surface of the guide member 200, the guide member 200 reaches the lowest position. That is, the leading ends of the guide member 200 and the plate 201 are slightly spaced apart from each other. These parts cause the guide member 200 to vibrate, thereby positioning the leading end of the film relative to the plate 201.

Therefore, the conveyance system 6 is energized. First roller group 206
The film is held and conveyed by the belts a to 206d and the belts of the second roller group 208a to 208C, and reaches the guide member 212 side.

At this time, since a step is formed in the guide member 212 between the flat portion 212a and the inclined surface portion 212b, if the size is large, the guide member 212 may be placed on the guide member 212 by exceeding the step portion. be done. In addition, in the case of a small-sized film, the film is placed on the flat portion 212a below the step of the guide member 212.

What is important here is that the film is turned upside down. Therefore, the guide member 21
2 is then derived from the 10th-ra group 2
Belts 06a to 206d and third roller group 210a
The roller pair 21 is held between belts of 210C to 210C.
Sent to the 4th side.

At this time, the magazine M is already attached to the magazine holding member 254.
Z is in the inserted state, and the opening below the magazine MZ remains open enough to receive the film.

Therefore, the motor 267 is energized, the swinging member 265 is lowered under the action of the link mechanism 269, and the roller 260 in the long hole 258 of the support plate 256 is displaced downward, and the film that is fed is comes into contact with the curved surface of the film feeding member 268. Further, under the action of the motor 267, the roller 260 is displaced downward against the elastic force of the coil spring 263, so that the film hits the bottom of the magazine MZ or the already stacked films. .

At this time, since the film feeding member 268 is held in tension by the coil spring 270 at one end thereof, the film feeding member 268 is moved under the displacement action of the lever member 262.
When the feed member 68 comes into contact with the film, the feed member 268 rotates about the pin 266 in the direction of the arrow. That is, the reaction force generated by the pressing force on the film causes the film feeding member 268 to move against the coil spring 27.
The film is displaced in the direction of the arrow against a tensile force of 0, and the curved tip portion 268a is converted into an action of feeding the film upward into the magazine MZ.

The film is pressed into the magazine by the feed member 268 and the end 262a of the lever member 262.

By repeating these operations, stacked exposure liquid films are stored inside the magazine. After a desired number of films have been stacked on this magazine MZ, it is taken out through the opening 252 in a light-shielded state.

By the way, after the film is taken out from the cassette C8 by the above-described operation, the cassette itself must also be ejected from the housing IO. This evacuation occurs automatically. That is, when the film is taken out from the cassette C8 and transferred in the direction of the guide member 200, the motor 164 is driven again. This rotates the link 170, and the roller 174 attached to the tip of the link 170 rotates the flange 180a of the closing plate 180 upward. and,
Finally, the lid C3c is pushed into the cassette C8. At this time, the sprocket 162, sprocket 158, and idle sprocket 160 also rotate under the rotational action of the chain 166, as described above, and the roller member 15
2 tries to return to the original position. That is, tension spring 1
56 is displaced in the direction of tension, and as a result, the arm member 142 also performs a displacement operation in the direction of the original position.

This displacement operation of the arm member 142 causes the unlocking lever member 140 to return to its original position within the range of the elongated holes 130a and 130b. Therefore, until now, the cassette C3 has been firmly held by the unlocking lever member 142.
The end portion of is now fully movable.

Therefore, the rotational drive source 181 rotates in the opposite direction, and the gear 1
82 and 183, the driving fork member 184 rotates in the opposite direction. Therefore, the pin members 42a, 5
2a and pin members 42b, 52b, the cassette holder 30 displaces the elongated holes 56a, 58a and 56b, 58b, and is displaced toward the opening 12. At this time, the roller members 44 and 54 provided on the pin member 42a152H push up the bent portions of the shutter opening member 27, and the shutter opening member 27 is displaced upward about the one end supported by the shaft. conduct.

As a result, the pin member 26 that engages with the tip of the shutter opening member 27 is attached to the shutter member 22 by the bracket 24.
to open. The driving fork member 184 rotates, and furthermore, in FIG.
If the cassette holder 30 is displaced toward the opening 12 via the cassette holder 58b, the cassette can be easily taken out from the outside.

The above is the basic operation of the apparatus according to the present invention. Next, the process of loading the cassette when the cassette itself has a different size, that is, when the size is smaller than that of the previous embodiment, will be explained below.

First, the lever member 14 is displaced by an external operation to bring the movable guide member 74 closer to the fixed guide member 48 so as to match the size of the cassette C3 to be inserted. This is the position indicated by the solid line in FIG. Such a displacement operation of the lever member 14 is performed by the movable guide member 7.
The plate body 66 integral with 4 is also displaced.

At this time, the pin member 68 is displaced together with the pin member 70 under the tension of the coil spring 64, and the coil spring 90 tensions the bottle 88, and similarly, the bottle 108 is also displaced under the tension of the coil spring 110 as shown in FIG. Reach the position shown in . In addition, the cassette displacement regulating member 81. Since the collars 100 and 111 attached to the plates 66 and 104 respectively enter the bent portions 83a and 183b of the cassette displacement regulating member 81, further movement is prevented. At this time, the unlock pin 96 (112) provided on the plate body 92 releases the locked state of the small size cassette.

Therefore, when the cassette C3 is inserted through the opening 12 in the same manner as described above, the locking pawl 78, which has fallen due to its own weight, rises around the pin member 76 so that its tip faces the locking hole 80. As a result, the movable guide member 74,
The plate 66.104 is fixedly positioned, and the cassette opens.

The rest is the same as in the previous embodiment.

[Effects of the Invention] As described above, according to the present invention, cassettes of different sizes can be brought to the unlocked state with a single mechanism. Furthermore, the structure itself is simple, and since it is a mechanical mechanism, concerns about failures and the like are eliminated. Furthermore, after the film has been ejected, the cassette can be automatically closed and the cassette can be locked at the same time, making it possible to easily take out the cassette. .

[Brief explanation of drawings]

Fig. 1 is a system configuration diagram of a mammography imaging apparatus related to the present invention, Fig. 2 is a schematic longitudinal sectional view of a device incorporating the cassette unlocking mechanism of the present invention, and Fig. 3 is a part of a cassette holder according to the present invention. FIG. 4 is a partially omitted longitudinal sectional view of the cassette holder according to the present invention; FIG. 5 is a partially omitted perspective view of the unlocking mechanism of the device according to the present invention; FIG. FIG. 7 is a partially omitted perspective view of a magazine mounting mechanism according to the invention; FIG. 8 is a perspective view of a cassette. 4...Cassette loading/discharging mechanism 6...Transport system 8...Magazine mounting mechanism 14...Lever part 22...Shutter part 27...Shutter opening member 30...Cassette holder 48... - Fixed guide member 74...Movable guide member 78...Lock claw 81...Cassette displacement regulating member 94...Sensor actuator 96...Unlock pin 102...Sensor 14
0...Unlocking bar member 180...Lid closing plate 184...Driving fork member 200.212...Guide member 204...Rotating member 254...Magazine holding part 256.・・Support plate 2
62... Lever member 268... Film feeding member 265... Swinging member U) Box

Claims (2)

[Claims] (1) A set of guide members whose opening can be enlarged and contracted according to the size of the cassette, and the guide member is displaced so that the locking mechanism of the cassette held by the guide member is exposed to the unlocking means. a first displacement means; and a second displacement means for displacing the unlocking means according to the position of the locking mechanism of the cassette, which varies according to the size of the cassette.
and a displacement means for a cassette. (2) In the unlocking mechanism according to claim 1, the pair of guide members and the unlocking means are configured to be integrally displaced by means for expanding and contracting the opening according to the size of the cassette. An unlocking mechanism for cassettes featuring: