JPH0693078B2 - Opening mechanism of cassette for image record carrier - Google Patents

Description

The present invention relates to an opening mechanism for a cassette for an image record carrier, and more specifically, a cassette for holding an image record carrier in a light-tight manner and loading it in an image reading device or the like in the device. This is for automatically opening the lid and taking out the stored image record carrier. Especially, even if the cassette has a different size corresponding to the size of the image record carrier, the lid can always be opened stably. ,
The present invention relates to an opening mechanism for an image record carrier cassette, which can further reduce the size of the entire apparatus by reducing the occupied operating range as much as possible.

Recently, a radiation image recording / reproducing system for obtaining a radiation image of a subject using a stimulable phosphor (stimulable phosphor) has been attracting attention. Here, the stimulable phosphor means radiation (X-ray, α
Rays, β rays, γ rays, electron rays, ultraviolet rays, etc.)
A phosphor that accumulates a part of the irradiation ray energy and the like and then emits stimulated emission light according to the accumulated energy when the excitation light such as visible light is irradiated later.

The above-mentioned radiation image recording / reproducing system uses this stimulable phosphor, and the radiation image information of a subject such as a human body is once provided with a sheet having a layer composed of the stimulable phosphor (hereinafter referred to as “accumulative phosphor sheet” or simply (Hereinafter referred to as "sheet"), the stimulable phosphor sheet is scanned with excitation light such as laser light to generate stimulated emission light, and the stimulated emission light is photoelectrically read to obtain an electric signal. Based on this electric signal, the radiation image of the subject is output as a visible image on a recording material such as a photographic photosensitive material or a display device such as a CRT.

Therefore, in such a radiation image recording / reproducing system, an image information reading device for reading the radiation image from the stimulable phosphor sheet on which the radiation image is stored and recorded specifically employs the following method.

That is, the stimulable phosphor sheet is two-dimensionally scanned with a light beam such as a laser beam, and the stimulated emission light emitted by this is detected in a time series by a photodetector such as a photomultiplier to detect image information. To get Then, the two-dimensional scanning of the light beam is usually performed by sub-scanning by mechanically transporting the stimulable phosphor sheet in one direction, and at the same time, the light deflected in the direction orthogonal to the transport direction of the sheet. This is achieved by irradiating a beam and performing main scanning.

In this case, the stimulable photoconductor sheet is exposed to radiation or the like while being stored in the cassette, whereby a radiation image of the subject is stored and recorded on the sheet. Then, the sheet is loaded into the image reading device through the cassette, taken out from the cassette through a sheet-fed mechanism including a suction plate, and then conveyed to a scanning position for scanning a light beam. To be done.

Therefore, FIG. 1 illustrates a general structure for taking out the stimulable phosphor sheet from such a cassette.

In FIG. 1, reference numeral 2 indicates a cassette according to the related art, and the cassette 2 has a housing 6 defining a chamber 4 in which a stimulable phosphor sheet S is housed, and an end portion of the housing 6. It includes a lid 10 which is swingably mounted via a hinge 8.

The cassette 2 configured as described above is loaded in, for example, the image reading device 12, and the lid 10 is opened via a suction plate 14 provided inside the image reading device 12 to open the chamber 4 in the image reading device. Open within 12. Then, the stimulable phosphor sheets S stacked and housed in the housing 6 are adsorbed and held under the driving action of the single-wafer mechanism including the suction board 16 and sent out to the image scanning reading unit through a transport mechanism (not shown). Be done.

By the way, various stimulable phosphor sheets S of different sizes
When performing the reading operation of each of the stimulable phosphor sheets S
It is necessary to prepare cassettes 2 of different sizes corresponding to. If the size of the cassette is different as described above, the size of the lid to be opened is naturally different.
Therefore, the lids of different sizes can be attached by the same suction plate 14.
When trying to open / close the lid 10, especially as shown by the one-dot chain line in FIG. 1, in the case of a small-sized lid body 10, the lid body 10 is oriented vertically and greatly tilted to open. As a result, it is covered, and as a result, the angle between the suction surface and the axial direction holding the suction disk 14 is largely deviated, and a sufficient suction effect cannot be achieved. Therefore, the suction plate 14 is peeled off from the lid body 10, and as a result, the lid body 10 is dropped.

Further, in order to avoid the above-mentioned inconvenience, as shown in FIG. 2, an opening mechanism 20 having a multi-link mechanism 18 is also adopted. That is, according to this configuration, the rotary drive source 22
The first arm 23 is connected to the drive shaft of the
A second arm 25 that swings around a fulcrum 24 is connected to 23. A third arm 27 is connected to the tip of the second arm 25 via a shaft 26, and the third arm 27 is further connected to the shaft.
The fourth arm 29 is connected via 28. Suction board 14
Is pivotally attached to the fourth arm 29 and faces the lid 10.

Therefore, with such a configuration, the link mechanism 18 swings in the direction of arrow B around the fulcrum 24 by the rotation of the rotary drive source 22 in the direction of arrow A, and the lid 10 holding the suction disk 14 by suction.
Function to open.

Therefore, even if the cassettes of different sizes are loaded temporarily, the inclination angle of the suction lid 14 with respect to the lid 10 should be corrected by the third arm 27 and the fourth arm 29 regardless of the difference in the length of the lid. become.

However, as can be easily understood from the drawing, the link mechanism 18 has a large number of parts and further has an inconvenience that the opening / closing operation range of the lid 10 becomes extremely large.

The present invention has been made to overcome the above-mentioned inconvenience, and a bearing that rolls on one surface thereof and a shaft member that supports the bearing are provided on a support member that swings under the driving action of a rotary drive source. Further, a suction plate and a guide member are fixed to the shaft member so that the suction plate is constantly in pressure contact with a predetermined position of a lid of a cassette for accommodating an image recording carrier under the guiding action of the guide member. , By this, even if the size of the lid is different, it is possible to allow the displacement of the tube body and always perform the suction action on the sheet at a stable position, and the opening action can be performed in the operation range as small as possible. An object of the present invention is to provide a lid opening mechanism for an image record carrier cassette configured as described above.

To achieve the above object, the present invention comprises a rotary drive source,
A support member that swings under the rotating action of the rotary drive source, a support shaft that holds a bearing that rolls on the upper surface of the support member, a suction plate, and a guide member, and the displacement of the guide member are restricted. A side plate having a hole, and a rotary drive source is driven to swing the support member under the guide action of the guide member so that the suction plate faces the lid of the cassette that accommodates the image recording carrier. Further, it is characterized in that the rotation drive source is driven to open the lid by suction.

Next, a preferred embodiment of the lid opening mechanism of the cassette for an image recording carrier according to the present invention will be described in detail below with reference to the accompanying drawings.

3 to 6, reference numeral 30 indicates an opening mechanism of the cassette for the image record carrier. As shown in the figure, the lid opening mechanism 30 includes a swing mechanism section 32 and a radiation image information reading device.
It is interposed between a pair of side plates 36a, 36b which are erected parallel to each other at a predetermined position inside 100. The side plates 36a, 36b
A support shaft 38 is rotatably bridged to the side shaft 36.
One end of support members 40a and 40b extending parallel to a and 36b is supported, and the support members 40a and 40b can swing about a support shaft 38. Locking pads 42a and 42b are attached to the lower surfaces of the other ends of the supporting members 40a and 40b.

Further, a rotary drive source 44 is fixed to the side plate 36b, and a disk 48 is attached to the tip of a rotary shaft 46 of the rotary drive source 44. In this case, a shaft 50 is eccentrically mounted on the disk 48, and the shaft 50 further pivotally supports an arm 52. A shaft extending parallel to the support shaft 38 is provided at the end of the arm 52.
54 engage and the shaft 54 holds the support members 40a, 40b at their respective ends.

On the other hand, substantially triangular hole portions 56a and 56b are formed at positions close to the tips of the side plates 36a and 36b. That is, the hole 56
Inner walls 58a, 58 pointing downward in the substantially vertical direction of a, 56b, respectively.
The angle formed by b, 60a and 60b is in this case defined as an acute angle. Therefore, the hole portions 56a, 56b are provided with guide members 62a, 62b each having a substantially wedge-shaped tip whose tip is directed downward in the vertical direction, that is, a tip having an acute angle. The guide member 62
The a and 62b are supported by a support shaft 64 parallel to the support shaft 38. Bearings 66a and 66b are externally fitted to the support shaft 64 at positions where the supporting members 40a and 40b contact, and rectangular holding members 68a and 68b are fixed between the bearings 66a and 66b. The holding members 68a, 68b hold hollow tubular bodies 70a, 70b that are directed downward in the vertical direction, and suction cups 72a, 72b are attached to the tips of the tubular bodies 70a, 70b. On the other hand, the tubular body 70
A tube member made of an elastic body (not shown) is connected to a and 70b, and this tube member is connected to a suction device (not shown).

The lid opening mechanism 30 of the cassette for the image record carrier is basically constructed as described above, and the locking mechanism of the cassette will be briefly described below.

In FIG. 4, reference numeral 74 a (b) indicates a lock mechanism of the cassette 2. On the upper surface of the side wall portion 76 which constitutes the cassette 2, there is formed a locking projection 80a (b) provided with an inclined surface 78a (b) which inclines downward, and extends vertically on the bottom surface of the housing 6. Then, the hole portion 82a (b) is formed so as to penetrate therethrough. In this case, the hole 82a (b) is for inserting a pressing pin for releasing the lock mechanism described later. A thin holding portion 84a (b) is integrally bulged on the lower surface of the lid body 10, and a locking portion 90a (b) is formed at the tip thereof. A coil spring 94a (b) is housed in a chamber defined between the holding portion 84a (b) and the lid 10. A claw member 86a (b) is displaceably arranged so as to be engaged with the tip end portion of the coil spring 94a (b), and a recess 88a (b) is defined below the claw member 86a (b). .
Therefore, the claw member 86a (b) is displaceable in front of the recess 88a (b). An inclined surface 92a (b) is formed on the claw member 86a (b), and the inclined surface 92a (b) faces the hole portion 82a (b).

The lock mechanism 74a (b) of the cassette is basically constructed as described above. Next, the radiation image information reading apparatus incorporating the lid opening mechanism 30 of the cassette for the image record carrier will be described below. A brief description will be given.

In FIG. 5, reference numeral 100 indicates a radiation image information reading device, and the lid opening mechanism 3 is provided at a substantially central portion of the reading device 100.
A cassette holding portion 102 is provided for removably mounting the cassette 2 including 0. In this case, the cassette holder 1
02 is composed of a lock release mechanism 104 for releasing the locked state of the lid body 10 and an opening mechanism 30 for opening and closing the lid body 10. The unlocking mechanism 104 is a holder 106a, 106
A hole 82a formed in the bottom surface of the housing 6 by sliding displacement in the vertical direction under the action of b and an actuator (not shown).
It is composed of pressing pins 108a and 108b that enter into (b).

In the vicinity of the cassette holder 102, for example, a sheet conveying mechanism 110 including a suction plate 109 that performs a single-wafer operation by a drive source (not shown) is arranged.

A first conveying means 114 including a conveying belt 112 is arranged near the sheet conveying mechanism 110. As shown in FIG. 5, a plurality of sheet accommodating portions 116 for accommodating the stimulable phosphor sheets S one by one are provided below the first conveying means 114, and the stimulable phosphor sheet taken out from the cassette 2 is provided. S
Is provided with a first stacker 118 for temporarily storing the. The first stacker 118 is configured to be movable in the direction of arrow D under the driving action of a motor or the like (not shown). The stimulable phosphor sheets S accommodated in the respective sheet accommodating portions 116 are placed on a bottom plate (not shown), and the sheets S of the first stacker 118 are rotated by rotating the bottom plate downward. The sheet is sent out to the side of the conveyor belt 124 via the conveyor belt 122 and the like constituting the second conveyor means 120 provided below. In this case, the reading unit 126 is provided near the end of the conveyor belt 124.

The reading unit 126 includes a third transport unit 128 that transports the stimulable phosphor sheet S in the arrow E direction (sub-scanning direction) and a scanning unit 130. The scanning means 130 includes a laser light source 132, and a laser light 1 is provided on the laser light deriving side of the laser light source 132.
A mirror 136 for scanning 34 on the sheet S, a galvanometer mirror 138, and a converging reflection mirror 140 are provided. Further, a light guide 142 is arranged along the main scanning line at the scanning position of the laser light 134 on the sheet, and a photomultiplier 144 is mounted on the light guide 142.

On the other hand, a conveyor belt 148 is provided at an end portion of the conveyor belt 146 that constitutes the third conveyor means 128, and the conveyor belt 148 once extends in the horizontal direction and then extends largely upward in the vertical direction. Other conveyor belts in the part that extends in the vertical direction
The sliding contact of 150 forms the fourth conveying means 152. Above the conveyor belt 148 is a set of conveyor belts 1 that are in sliding contact with each other.
54a and 154b are provided, roller pairs 156 and 158 are provided above the conveyor belts 154a and 154b with a predetermined distance therebetween, and an erasing section 160 is provided between the roller pairs 156 and 158. It The erasing unit 160 includes an erasing light source 16 such as a sodium lamp, a tungsten lamp, or a xenon lamp.
A plurality of 2 are provided, and the reading unit 126 functions to completely erase the radiation image remaining on the stimulable phosphor sheet S from which the radiation image has been read by the erasing light source 162.

Above the roller pair 158, there is further provided a conveyor belt 166 which constitutes the fifth conveyor means 164. The conveyor belt 166 extends horizontally on the upper side thereof and a short conveyor belt 168 is provided. It is in sliding contact. Conveyor belt 1
A sixth conveyance means 172 including a conveyance belt 170 is provided at the end of 66, and the traveling direction is 180 degrees via the sixth conveyance means 172.
The stimulable phosphor sheet S that is deviated by the second stacker 17
4 is configured to be transported.

The second stacker 174 is configured similarly to the first stacker 118 described above, and is provided with a plurality of sheet storage portions 176,
It is configured to be movable in the direction of arrow F under the driving action of a motor or the like (not shown). A pair of rollers 178 is disposed below the second stacker 174, and a seventh conveying unit 180 is provided in the vicinity of the pair of rollers 178. In this case, the seventh conveying means 180 conveys the stimulable phosphor sheet S supplied from the second stacker 174 to the auxiliary erasing section 182, and the auxiliary erasing section 182 is provided with the erasing light source 184. ing. Further, the stimulable phosphor sheet S passing through the auxiliary erasing section 182 is stored in the cassette 2 via the sheet body transport mechanism 110.

Therefore, the operation of taking out the sheets S contained in the cassette 2 will be described.

First, the cassette 2 is loaded in the device 100 in a light-tight state.
Next, as shown in FIG. 3 to FIG.
When the pressing pins 108a and 108b of 104 are displaced vertically upward under the driving action of an actuator (not shown), the pressing pins 108a and 108b enter into the holes 82a (b) formed in the bottom surface of the housing 6 and the claw members are formed. The locking mechanism 74a is brought into contact with the inclined surface 92a (b) of 86a (b) and displaces the pawl member 86a (b) in the direction of arrow C.
Release (b). Then, FIGS. 3 and 6 a, b
As shown in FIG. 5, the rotary drive source 44 of the lid opening mechanism 30 is driven, and the disk 48 is moved by the arrow G through the rotary shaft 46.
When rotated gently in the direction, the arm 52 pivotally supported by the shaft 50
Rotates vertically downward by the link motion, and the support members 40a and 40b rotate downward with the support shaft 38 as a fulcrum via the shaft 54. Therefore, the support shaft 64 that is in contact with the upper surfaces of the support members 40a and 40b and is supported by the bearings 66a and 66b is displaced downward. For this reason, the guide members 62a, 62b attached to both ends of the support shaft 64 are in contact with the inner walls 56a, 58a and 56b, 58b as the guide members 62a, 62b are displaced downward in the holes 56a, 56b, respectively, and the respective tip portions are The inner walls 56a, 58a and 56b, 56b are guided so as to reach an angle formed by convergence, that is, an acute angle portion that is directed downward in the substantially vertical direction.

In this way, the displacement of the guide members 62a, 62b in the hole portions 56a, 56b means that the support shaft 64 holding them is the suction plates 72a, 7b.
It means that it is displaced together with 2b, and as a result, the bearings 66a, 66b roll on the support members 40a, 40b.
Therefore, the suction plates 72a and 72b come into pressure contact with the lid 10 of the cassette 2. Here, if the suction device is energized, the spindle
The suction plate 72 supported by the support member 64a and the holding members 68a and 68b.
The a and 72b are adsorbed to the upper surface of the lid body 10 forming the cassette 2 by the tube bodies 70a and 70b and a tube member (not shown). Then, by driving the rotary drive source 44 again, the suction plates 72a, 72b
Opens the lid 10 under the suction action. That is, the cassette 2 is opened in the reading device 100. After the lid 10 is opened, the lock release mechanism 104 is driven to displace the pressing pins 108a and 108b vertically downward.

As described above, the mechanism for performing the lid-opening operation can favorably cope with the case where cassettes of different sizes are loaded. This is shown in FIG. That is, the inclination angle of the lid 10 of the cassette 2 in FIG.
It is larger than the inclination angle of the lid 10 in FIG.
Since the support members 40a and 40b and the lid 10 have different radii of rotation, the support members 40a and 40b and the lid 10 are not parallel to each other, unlike the case of FIGS. 6A and 6B. However, in this case, the support shaft 64 rotates in the direction of arrow J and the supporting members 40a, 40b.
Of the suction cup in order to absorb the difference by rolling displacement in the extending direction of
72a, 72b follow the inclination of the lid body 10, the extending direction of the support members 40a, 40b and the angle formed by the axes of the tube bodies 70a, 70b are kept substantially orthogonal, and the suction plates 72a, 72b cover the lid body 10. It can be surely adsorbed and held. The guide members 62a and 62b have holes 56a and 56b.
The inside can be freely displaced.

Next, the sheet conveying mechanism 110 is driven. As shown in FIG. 5, the suction plate communicating with the suction device (not shown) is driven in the direction of arrow H by a drive device (not shown) and further descends vertically downward to suck and hold the sheet S, and subsequently, together with the sheet S. , Vertically upward and in the direction of arrow I. Then, the sheet S is dropped by stopping the suction device, and the sheet S is supplied to the first transport unit 114.

Then, the stimulable phosphor sheet S is transferred by the first conveying means 114.
The sheet is conveyed by being directed downward in the vertical direction via the sheet, and is supplied into the sheet storage unit 116 that constitutes the first stacker 118. Therefore, the stimulable phosphor sheet S that has been conveyed or the stimulable phosphor sheet S that has been accommodated in the other sheet accommodating portion 116 is delivered to the second conveying means 120 side, and
The reading unit 1 via the conveying unit 120 and the conveying belts 122 and 124.
Transported to 26.

The stimulable phosphor sheet S reaching the reading unit 126 is conveyed in the sub-scanning direction (direction of arrow E) via the conveyor belt 146 that constitutes the third conveying unit 128, and the scanning unit 130 is driven. That is, the laser light 134 emitted from the laser light source 132 is reflected by the mirror 136 to reach the galvanometer mirror 138, and the laser light 134 is scanned on the sheet S under the swinging action of the galvanometer mirror 138. As a result, the stimulated emission light emitted from the sheet S is directly or reflected by the reflection mirror 140 to enter the light guide 142, and this is converted into an electric signal by the photomultiplier 144, for example, an image recording device. Etc.

In this way, the stimulable phosphor sheet S, which has finished reading the radiation image, passes through the conveyor belt 148, the fourth conveyor means 152 including the conveyor belt 150 slidably contacting the conveyor belt 148, and the conveyor belts 154a and 154b. To the erasing section 160 after passing through the roller pair 156. In the erasing unit 160, a plurality of erasing light sources 162 are turned on,
The irradiation light completely erases the radiation image remaining on the stimulable phosphor sheet S. The stimulable phosphor sheet S from which the radiation image has been erased by passing through the erasing unit 160 is the fifth conveying means.
After being conveyed upward in the vertical direction via the conveying belts 166 and 168 constituting the unit 164, the conveying direction is shifted in the horizontal direction and reaches the sixth conveying means 172. The stimulable phosphor sheet S, which is displaced by 180 ° in the conveying direction by the sixth conveying means 172, is stored in a desired sheet storage portion 176 of the second stacker 174.

On the other hand, after the stimulable phosphor sheet S is taken out from the cassette 2, if the stimulable phosphor sheet S previously stored in the sheet storage section 176 is sent out from the roller pair 178 to the seventh conveying means 180, this storable property is obtained. The phosphor sheet S is an auxiliary erasing unit 182.
The secondary erasing is performed via the erasing light source 184 and is sent to the sheet conveying mechanism 110 side. Then, the sheet S
Is sucked and held by the lowering of the sucker 109, and then sucker 1
Together with 09, it will be transported in the direction of arrow H and completely stored in the cassette 2.

In this way, the stimulable phosphor sheet S is placed in the cassette 2.
After storing the sheet, the drive of the suction device is stopped, and the sheet S
The suction plate 109 is lifted up and moved in the direction of arrow I. Subsequently, the support members 40a and 40b of the lid opening mechanism 30 are rotated and lowered under the action of the rotary drive source 44, and the suction action of the suction plates 72a and 72b is stopped. 86a
(B) brings the inclined surface 92a (b) into contact with the inclined surface 78a (b). Therefore, when the support members 40a and 40b are further rotated and lowered under the action of the rotary drive source 44, the suction portion 34 including the suction plates 72a and 72b and the bearings 66a and 66b is guided by the guide member 62.
It is separated from the support members 40a and 40b connected to the a and 62b.

Next, the locking pads 42a, 42b are brought into contact with the upper surface of the lid 10 and pressed to resist the elastic force of the coil spring 94a (b) so that the inclined surface 92a (b) of the claw member 86a (b) engages. It slides on the inclined surface 78a (b) of the stopping projection 80a (b) and is displaced in the direction of arrow C. When the locking pads 42a and 42b are further pressed, the lid 10 and the locking projection 80a (b) face each other, and as a result, the claw member 86a (b) is moved toward the side wall 76 by the coil spring 94a (b). It is driven elastically and the lid 10 is locked.
After that, the cassette 2 is taken out from the cassette holder 102, and a new cassette for accommodating the stimulable phosphor sheet S in which the image information is accumulated and recorded may be loaded into the cassette holder 102 as required.

According to the present invention, it is possible to reliably open cassettes of different sizes and lids selected to have arbitrary lengths as described above, and avoid accidents such as dropping of lids due to suction failure. You can do it.

Further, the lid can be selected to have a length sufficient to take out the sheet S, while as shown in FIG. 5, the range required for the opening / closing operation of the lid in the reading device is set as much as possible. Therefore, it is possible to expand the selection range of the size of the sheet S and to reduce the size of the reading device.

As described above, according to the present invention, when opening cassettes of different sizes or lids selected to have an arbitrary length, especially when performing opening of a small lid, suction is performed under the action of the guide member. Since the support shaft that supports the board is rotationally displaced and absorbs the difference in inclination angle between the support member and the lid body, the suction board follows the lid body, so that the lid body can be securely sucked and held. Produce an effect. Moreover, since the cassette can be locked by the same mechanism, there is an advantage that the structure of the device can be further simplified.

Although the present invention has been described with reference to the preferred embodiment, the present invention is not limited to this embodiment,
Needless to say, various improvements and design changes can be made without departing from the scope of the present invention, for example, the present invention can be applied to a normal X-ray film cassette.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a cassette for an image recording carrier according to the related art, FIG. 2 is a schematic side view of a lid opening mechanism of the cassette for an image recording carrier according to the related art, and FIG. 3 is an image recording according to the present invention. FIG. 4 is a perspective view of a lid opening mechanism of the cassette for carrier, FIG. 4 is a schematic vertical cross-sectional view of a locking mechanism of the cassette which constitutes a radiation image information reading apparatus including the lid opening mechanism of the cassette for image recording carrier according to the present invention, and FIG. FIG. 6 is a schematic explanatory view of a radiation image information reading apparatus including a lid opening mechanism for an image record carrier cassette according to the present invention, and FIG. 6A is a lid closing mechanism for the image record carrier cassette according to the present invention. FIG. 6b is a schematic side view of the cassette for an image recording carrier according to the present invention in a lid state, and FIG. 6b is a schematic side view of the cassette in the opened state of the cassette. FIG. 7 is a cassette for an image recording carrier according to the present invention. At the opening radius It is a schematic side view of a different lid with the lid open. 30 …… Opening mechanism, 40a, 40b …… Supporting members 62a, 62b …… Guide member 64 …… Spindles 66a, 66b …… Bearings 68a, 68b …… Holding members, 70a, 70b …… Tubes 72a, 72b ...... Suction plate

Claims (3)

[Claims] 1. A rotary drive source, a support member swinging under the rotary action of the rotary drive source, and a support shaft for holding a bearing that rolls on the upper surface of the support member, a suction plate, and a guide member.
The guide member is composed of a side plate having a hole portion whose displacement is restricted, and the rotary drive source is driven to swing the support member under the guide action of the guide member to collect the image pickup carrier on the suction plate. An opening mechanism for a cassette for an image recording carrier, characterized in that it is arranged to face a lid of a cassette to be mounted and further drive a rotary drive source to suction and open the lid. 2. The mechanism according to claim 1, wherein the hole formed in the side plate has a substantially triangular shape with the lowermost portion having an acute angle, and the guide member can reach the lowermost portion. An opening mechanism for a cassette for an image recording carrier, which has an acute angle portion. 3. The mechanism for opening a cassette for an image recording carrier according to claim 1 or 2, wherein the support member is provided with a pad member for locking the cassette.