JPH0459542A - Method and device for detecting presence of film in film containing means - Google Patents

Abstract

PURPOSE:To improve detection precision of the presence of a film in a film containing means without damaging a film by sucking the reassessed part of a film contact member by means of an adsorber for detecting a recessed part formed of a material having hardness higher than that of an adsorber for conveyance. CONSTITUTION:An adsorber 140 for detecting a recessed part is located independently from an adsorber 136 for conveyance, and an adsorbing part 140A of the adsorber 140 for detecting a recessed part is formed of a material hardness higher than that of the adsorber 136 for conveyance. This constitution prevents closing of a gap between a recessed part 13C of a film contact member 13 and the adsorbing part 140A of the adsorber 140 for detecting a recessed part due to deformation of the adsorber 140A of the adsorber 140 for detecting a recessed part. Thereby, reduction of a suction force due to leakage of air can be kept at a value lower than a given value, and detecting precision of the presence of a film F in a film containing means 12 can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for detecting the presence or absence of a film in a film storage means, which detects the presence or absence of a film in the film storage means based on the difference in suction pressure of a suction cup. .

[Prior art]

A film in which sheet-like films such as X-ray films are stacked and stored in a film storage means such as a magazine, and are taken out one by one in a light-shielded state and fed and loaded into an X-ray photography cassette. A feeding device is known in which the cover of the magazine is opened while keeping the film in a light-shielded state, and then the film is sucked and taken out by a transport suction cup, and delivered to the transport system for the cassette.

This conveyance suction cup moves while sucking the film, and thereby the film is held between conveyance rollers on the downstream side and conveyed to a predetermined position.

On the other hand, the bottom layer of films stacked inside the magazine has
A film holding member is arranged to hold the film in the magazine. - For boat fishing, relatively soft cardboard or the like is used as the film cover member to prevent the film from being scratched.

In addition, in order to prevent the transport suction cup from coming into contact with the film abutting member after taking out the lowest layer of film in the magazine, the suction pressure of the transport suction cup is As a leakage means, a cutout is formed in the part of the film abutment member facing the suction cup (Utility Model Publication No. 61-2).
0591), those with stripes or uneven patterns (Japanese Utility Model Publication No. 61-4915), those with meandering cuts (Japanese Utility Model Publication No. 62-68933), and those with multiple straight lines. (1986-1983)
No. 68934), one in which a narrow groove is formed that is smaller in length and larger in length than the diameter of the suction cup for conveyance (Utility Model Publication No. 55-1690).
(Japanese Utility Model Publication No. 55-20683), in which a convex portion is formed that is smaller in diameter and longer than the conveying suction cup (Japanese Utility Model Publication No. 55-20683). In addition, a film abutting member is formed with a through hole into which a contact for detecting the presence or absence of a film and controlling the suction operation enters (Japanese Patent Laid-Open No. 11104
No. 39) is also disclosed.

[Problem to be solved by the invention]

However, if the above-mentioned film contact member has a cutout, cut, or through hole, pressure marks may be left on the film due to the contact pressure of the conveying suction cup or the contact, and photosensitive materials such as X-ray film may be In this case, it is not preferable because it may cause deterioration of photographic properties such as pressure blur.

In addition, if the above-mentioned film holding member has stripes, uneven patterns, narrow grooves, or convex portions, after all the films stacked in the magazine are suctioned and taken out by the conveyance suction cup, these are removed. The suction cup for conveyance comes into contact with and attracts the stripes, uneven patterns, narrow grooves, or convex parts of the film abutment member, but the suction part of the suction cup for conveyance is usually made of a relatively soft elastic material such as rubber. Since the suction part of the conveyance suction cup is easily deformed so as to come into close contact with the surface of the support member, sufficient leakage (air leakage) cannot be obtained, and it is insufficient as a means to reliably eliminate the cause of failure of the suction device. there were.

In addition, a method and apparatus for detecting the presence or absence of film in a film storage means, which detects the presence or absence of film in a magazine based on a change in suction pressure due to leakage when there is no film on the film holding member, includes a suction cup for conveyance. A problem occurs in that the suction part is deformed and sufficient leakage (air leakage) cannot be obtained, resulting in a decrease in the accuracy of detecting the presence or absence of a film.

The present invention has been made in consideration of the above facts, and an object of the present invention is to provide a method and apparatus for detecting the presence or absence of a film in a film accommodating means, which can improve the accuracy of detecting the presence or absence of a film in the film accommodating means without damaging the film.

[Means to solve the problem]

The invention described in claim (1) is capable of sucking the films stacked and stored in the film storage means one by one using a transporting suction cup, and transporting the films to a predetermined position by moving the transporting suction cup. A film that is used in a film feeding device that sucks the film or a recessed portion of a film abutment member disposed at the bottom layer of the film, and detects the presence or absence of the film in the film storage means based on the difference in suction pressure. The method for detecting the presence or absence of a film in a storage means is characterized in that the recess is sucked by a recess detecting suction cup, the suction part of which is made of a material harder than the conveyance suction cup.

The invention according to claim (2) is characterized in that the suction systems of the conveyance suction cup and the recess detection suction cup are made independent.

The invention recited in claim (3) is a film abutment member in which the recess detection suction cup is formed in a peripheral edge area of the film surface of the film or in a position corresponding to a peripheral edge area of the film surface of the film. It is characterized by suctioning the recessed parts.

The invention described in claim (4) sucks the films stacked and housed in the film storage means one by one using a transporting suction cup, and transports the films to a predetermined position by moving the transporting suction cup. The device is used in a film supplying lid that sucks the film or a concave portion of a film abutment member disposed at the bottom layer of the film, and detects the presence or absence of the film in the film storage means based on the difference in suction pressure. A device for detecting the presence or absence of a film in a film storage means, wherein at least a suction portion is made of a material harder than the conveying suction cup, and includes a recess detection suction cup for suctioning the recess, and a suction cup for recess detection. The present invention is characterized by comprising a film presence/absence detection means for detecting the presence or absence of a film in the film storage means based on a pressure difference.

The invention according to claim (5) is characterized in that the suction system of the conveyance suction cup and the suction system of the recess detection suction cup are each independent.

The invention according to claim (6) is characterized in that the recess detection suction cup and the recess of the film applying member are provided at positions facing the peripheral edge region of the film surface of the film.

[Effect]

In the method and device for detecting the presence or absence of a film in a film accommodating means of the present invention, the films stacked and housed in the film accommodating means are sucked one by one by a conveying suction cup,
By moving this conveyance suction cup, the film is conveyed to a predetermined position.

In addition, a recess detection suction cup whose suction part is made of a material with higher hardness than the conveyance suction cup is brought into contact with the film to perform suction. The suction cup and the film come into close contact, and the suction pressure reaches a predetermined value.

On the other hand, when there is no film left in the film storage means, the recess detection suction cup sucks the recess of the film abutment member disposed at the lowest layer of the film. In this case, a gap is created between the suction part of the recess detection suction cup and the recess of the film applying member, air leakage occurs, and the suction pressure becomes lower than a predetermined value. This difference in suction pressure is detected by the film presence/absence detection means, and the presence/absence of the film in the film storage means is detected.

Therefore, in the present invention, the recess detection suction cup is provided separately from the transportation suction cup, and the suction part of the recess detection suction cup is made of a material that is harder than the transportation suction cup.
Due to the deformation of the suction part of the recess detection suction cup, the gap between the recess of the film applying member and the suction part of the recess detection suction cup will not be closed. Therefore, the reduction in suction pressure due to air leakage can be made greater than a predetermined value, and the accuracy of detecting the presence or absence of a film in the film storage means can be improved.

In addition, if the suction system of the suction cup for conveyance and the suction system of the suction cup for recess detection are made independent, in normal film suction conveyance, the conveyance It is possible to prevent poor adsorption of the suction cup.

In addition, when the recesses of the recess detection suction cup and the film abutment member are provided at positions facing the peripheral edge area of the film surface of the film, the image area of the film can be physically moved by the contact pressure of the recess detection suction cup, etc. Or it will not be damaged photographically.

〔Example〕

FIG. 6 shows a sheet film supply device 10 to which the present invention is applied.

This sheet film supplying device 10 has a frame formed by a frame 11, and an outer plate 11A fixed to the frame 11, which has a light-shielding structure inside. A plurality of magazines 12 are installed in the lower part of the frame 11 in the vertical direction, and these magazines 12
A sheet film F is housed inside each of them. These sheet films F are of different types (size, film type) for each magazine 12, and a desired sheet film F is loaded into the cassette 18 by the take-out means 14 and the holding means 16. There is.

However, it is not limited to the case where different types of films are housed in each magazine 12, and when there is a frequently used film, the same type of film may be housed together in a plurality of magazines.

The cassette 18 is manually loaded into the interior through the loading port 10A (usually shielded) provided at the top of the sheet film supply device 10 (in the direction of the arrow) and is pulled in by the driving force of the cassette drive mechanism 20. It is configured to be placed in the position shown in FIG.

As shown in FIG. 8, this cassette 18 has a dish-shaped cassette main body 18A whose interior is used as a housing portion for the sheet film F, and a lid plate 18B is pivotally supported by one end of this cassette main body 18A. The inside can be opened and closed. A claw 22 protruding from the tip of the cover plate 18B engages with a window 18C formed in a part of the cassette body 18A to maintain the closed state of the cassette body 18A, but the cassette drive mechanism 20 does not open the cassette 18. By pressing the lid pin 24, the lid opening pin 24 pushes the claw 22 into the cassette main body 18A, and the lid plate 18B is opened as shown in FIG. 8 by the biasing force of an elastic body (not shown). has been done.

Further, as shown in FIG. 6, a take-out means 26 is arranged near the film entrance/exit of the loaded cassette 18.
The suction cup 28 receives a driving force from a driving source (not shown) to take out the photographed sheet film F from the cassette main body 18A and transfer it to the conveyance roller 32. These conveyance rollers 32 are configured to receive a driving force from a driving source (not shown) and send out the photographed sheet film F to the developing device 34 (in the direction of arrow B).

Note that when the cassette 18 is loaded into the sheet film supply device 10 and the lid plate 18B is opened by the lid opening pin 24, a lid opening/closing mechanism (for example, Utility Model No. 63-1
41950 and Utility Model Application Publication No. 63-141951), the cover plate 18B is opened further,
When an unexposed sheet film F is loaded after taking out the photographed sheet film F, the lid plate 18B may be closed and the sheet film F may be pushed out from the loading opening 10A.

Further, a film type identification sensor 168 is installed in the sheet film supply device 10 near the loading position of the cassette 18 (the position shown in FIG. 6).

This film type identification sensor 168 is connected to the control device 130 and is configured to be able to detect a film type identification signal (not shown) attached to the cassette 18. Based on this signal, the control device 130 can select the sheet film F to be loaded into the cassette.

As shown in FIG. 7, the magazine 12 is formed in the shape of a deep dish, and a large number of unexposed sheet films F are stored therein in a stacked state. The upper end surface of this magazine 12 has a fixed cover plate 12A that closes the half opposite to the take-out means 14, and the other half serves as a take-out opening 12B. A slide lid 12C corresponds to the extraction opening 12B, and this slide lid 12C is connected to the extraction opening 12B as shown in FIG.
It is configured such that it can slide from a state where B is securely closed to a state where it slides under the lid plate 12A and a state where the extraction opening 12B is opened.

These magazines 12 are each housed in a movable table 36 installed in multiple stages on the frame 11 of the sheet film supply device IO. These movable tables 36 are formed into a frame shape so as to support the peripheral bottom portion of the magazine 12. At the upper ends of both sides of the movable table 36, there are bent portions 3 that protrude in the horizontal direction.
6A is formed, and this bent portion 36A is placed on a roller 38 whose axis is horizontally supported on the frame 11. Each movable table 36 is in a standby position when the magazine 12 is loaded and shown in solid lines in FIG.
Open door 11B of No. 1 and move to the left side of Figure 6 (arrow C
Direction) The pulled out state is the replenishment position for the sheet film F. Furthermore, this magazine 12 is moved from the standby state to the right in FIG. 6 (in the direction of the arrow), and the state where the take-out opening 12B reaches below the take-out means 14 is the film take-out position. In order to stop the magazine 12 at a predetermined position while the sheet film F is on standby, a notch 36B is formed in the bending part 36A, and this notch 36B is connected to the roller 3.
8, the movement of the moving table 36 is stopped.

As shown in FIG. 7, the extraction means 4 is provided with a pair of elevating and lowering frames 122 that are parallel to each other. These elevating frames 122 are fixed in parallel to each other by a plurality of connecting rods 124, and a guide shaft 128 passes through a guide block 126 fixed on the outside. In addition, a similar guide block 127 is provided on one side of the lifting frame 122.
are fixed and the screw shaft 132 is screwed together. The guide shaft 128 and the screw shaft 132 are vertically arranged, and the upper and lower ends of the guide shaft 128 are fixed to the frame 11.
9 (Fig. 6) to rotate. Therefore, when the screw shaft 132 rotates under the driving force of the motor, the ejecting means 14 is raised or lowered so that it can correspond to each magazine. Further, the pulse motor 129 is controlled to stop driving by the control device 130.

A conveyance suction cup 136 is disposed between these elevating frames 122 on a shaft 135 attached to the tip of an arm 134, and this arm 134 is pivotally supported on a shaft 138 to the tip of an arm 142. The arm 142 is supported by a shaft 144 on the lifting frame 122 . Also these arm 1
34. In order to control the rotation angle of 142, the control device 13
Pulse motors 146 and 148 connected to the arms 134.
142.

This allows the transport suction cup 136 to
The sheet film F in the magazine 12 moves approximately vertically downward from the state shown in FIG.
The sheet film F is sucked, and as it further rises, it moves to the right and sends out the tip of the sucked sheet film F to the holding means 16.

A pulley 62.64 is pivotally supported at the lower part of the lifting frame 122 by a support shaft 56.58.

An endless timing belt 6 is attached to these pulleys 62 and 64.
6 is wrapped around it. The support shaft 58 is the elevating frame 122
It is rotated by the driving force of a pulse motor 68 (7) fixed to the motor. This pulse motor 68 is also controlled by the control device 130. Further, a pull-out bin 72 is fixed to a part of the endless timing belt 66, and its axis is parallel to the pulleys 62 and 64, and corresponds to the engagement arm 74 fixed to the front end of the moving table 36. ing. This engagement arm 74 has a drawer bin receiving part 74A that opens downward in a U-shape, and when the endless timing belt 66 is rotated clockwise in FIG. 74A, so that the movable table 36 is pulled out together with the magazine 12 in the direction of arrow D to below the take-out means 14, and becomes the film take-out position. Note that a notch 74B is formed in the engagement arm 74 to avoid interference with the pulley 62 and the endless timing belt 66.

When the movable table 36 is pulled out to the film ejection position by the rotation of the pulleys 62 and 64, the arm 12 protruding upward from the slide lid 12C of the magazine 12 midway
D comes into contact with the magnetic adsorption piece 76 installed on the connecting rod 124 of the elevating frame 122 and is prevented from moving, so the magazine 12 moving together with the moving table 36 and the slide lid 12C move relative to each other, and the ejection opening 12B opens. It is now open. Furthermore, when the movable table 36 and the magazine 12 are returned to the standby position by reverse rotation of the Boo'J62.
The removal opening 12B is closed by the relative movement.

As shown in FIG. 7, a pair of elevating frames 42 are fixed to the holding means 16 in parallel with each other by a plurality of connecting rods 44, and the sheet film F is held between these elevating frames 42. ing.

Guide block 4 fixed to the outside of the lifting frame 42
A guide shaft 48 whose axis is perpendicular and whose upper and lower ends are fixed to the frame 11 passes through the guide shaft 6 . A screw shaft 52 is screwed into a similar guide block 47 on one of the lifting frames 42, and this screw! 52 is arranged parallel to the guide shaft 48. Therefore, when the screw shaft 52 rotates under the driving force of the pulse motor 54 or the like, the elevating frame 42 moves up and down to a predetermined position so that it can accommodate each magazine 12 and cassette 18. The pulse motor 54 is driven and stopped by a control device 130.

A pair of upper and lower entrance clamping rollers 82 are pivotally supported in parallel to each other between the elevating frames 42 near their lower ends. These inlet nipping rollers 82 receive the sheet film F taken out from the magazine 12 by the conveying suction cup 136, feed it in the direction of arrow E, and roll the sheet film F in an approximately semicircular shape.
This is to hold the object in a curved manner. In addition, a pair of intermediate portion nipping rollers 84 and a pair of intermediate portion nipping rollers 86 are pivotally supported in the same way as the artificial nipping rollers 82 corresponding to the intermediate portions of the sheet film F held in a semicircular shape. Furthermore, a pair of outlet clamping rollers 88 are provided for clamping the leading end of the sheet film F held in a semicircular shape. Therefore, when a long sheet film F is held, the rear end of the sheet film F is held by the inlet holding roller 82, the middle part is held by the intermediate holding rollers 84 and 86, and the leading end is held by the exit holding roller 88. That will happen. Further, even when the sheet film F is short in size, the leading end portion is always held by the exit nipping roller 88.

The outlet clamping roller 88 is pivotally supported near the tip of a tilting frame 94 that is pivotally supported by a shaft 92 to the elevating frame 42 . A first swing link 97 is pivotally supported at the tip of the tilting frame 94 by a pin 96, and the other end of the first swing link 97 is pivotally supported by a pin 98 to a second swing link 99. This second swing link 99 is pivotally supported by a rotating shaft 100 that is connected to the lifting frame 42, and a pulley 102 fixed to this rotating shaft 100
A part of the endless belt 104 is wrapped around it. The other part of the endless belt 104 is connected to a pulse motor 10 which is fixed to the lifting frame 42 and controlled by a control device 130.
It is wound around a pulley 108 fixed to the output shaft of No. 6.

Therefore, when the pulse motor 106 rotates, the second swing link 99 rotates together with the rotating shaft 100, and the first swing link 97 receives this rotational force and moves the tilting frame 94 counterclockwise (in the direction of arrow G) as shown in FIG. ). As a result, the sheet film F moves to above the entrance of the cassette 18 with its leading end held by the outlet holding rollers 88, thereby making it easier to insert the sheet film F into the cassette 18.

As shown in FIG. 7, on the outside of the lifting frame 42, there are a boo' 1114 and an endless timing belt for transmitting the driving force of the pulse motor 112 to the entrance clamping roller 82, intermediate clamping rollers 84, 86, and exit clamping roller 88. 116
are used multiple times.

The pulse motor 112 is driven and stopped by a control device 130.

As shown in FIG. 1, an abutment member 13 serving as a film abutment member is disposed at the bottom layer of the sheet films F stored in a stacked state in the magazine 12. This contact member 13 is made of cardboard or the like. The contact member 13 is housed together with the sheet film F in the film packaging bag, and when the sheet film F in the packaged state is loaded into the magazine 12 and then the film packaging bag alone is taken out, the pressing member 13 is inserted into the magazine 12. It interferes with the squeezing roller provided in the magazine 12, and only the sheet film packaging bag can be taken out from the magazine 12.

A portion 13A of the backing member 13 corresponding to the rear end of the sheet film F is bent in a U-shape, and sandwiches the rear end of the sheet film F from the front and back.

On the other hand, the edge in the width direction (in the direction of arrow W in FIG. 1) of the tip end 13B of the support member 13 corresponding to the tip of the sheet film F, that is, the peripheral edge of the film surface of the sheet film F (in the case of an X-ray film A recessed portion 13C is formed at a position facing the non-image area). This recess 13C is shaped like an ellipse along the conveyance direction of the sheet film F (30 to 50 holes in the longitudinal direction, 5 to 8 holes in the width direction, and 0.2 to 0 in depth).
5 mm), and is formed on the abutment member 13 by press working or the like.

As shown in FIG. 2(A), a convex portion 13D protrudes from the back surface of the abutting member 13 (side surface of the bottom surface 12E of the magazine 12) corresponding to the concave R13C. It is in contact with 12E. In this case, the convex portion 1
The back surface of the contact member 13 other than 3D does not make full contact with the bottom surface of the magazine 12, and creates a gap portion 12F at least equal to the dimension in the depth direction of the recess 13C, but the gap is only 0.2 0.5 m), and has the same effect on functions such as holding the laminated sheet film, suctioning the sheet film F by the sheet film conveyance suction cup 136, and contacting the concave part 13C with the concave suction cup 140. Never.

In addition, in the case where the depth of the concave portion 13C is increased, the bottom surface 12 of the bagazine 12 is cut in order to accommodate the convex portion 13D of the backing member 13, as shown in FIG. 2(B).
A recess 12H may be provided in E.

As shown in FIG.
The two transport suction cups 136 described above are brought into contact with B. Also, on the same straight line as the conveyance suction cups 136, there is an arm 134 similar to these conveyance suction cups 136.
A recess detection suction cup 140 is provided on a shaft 135 attached to the tip of the recess. Suction part 1 of this recess detection suction cup 140
40A is provided at a position facing the peripheral edge (non-image area) of the film surface of the sheet film F, and the recess detection suction cup 140 is installed on the abutment member 13 when there is no sheet film F on the abutment member 13. It comes into contact with a recess 13C formed in the.

As shown in FIG. 3, the suction portion 140A of the recess detection suction cup 140 has a cylindrical shape with a smaller diameter than the suction portion of the conveyance suction cup 136, and its outer diameter is larger than the width M of the recess 13C. It's been made bigger.

Therefore, the suction portion 140A of the recess detection suction cup 140 is configured to abut the contact member 13 across the recess 13C. In addition, the length of the recess 13C is determined by the recess detection suction cup 1.
The length is increased by the outer diameter of the suction portion 140A of 40.

Therefore, when the suction part 140A of the recess detection suction cup 140 is in contact with the abutment member 13 and the abutment member 13 is sucked by the recess detection suction cup 140, as shown in FIG. Air leaks from a gap 141 between the adsorption portion 140A of the holder 140 and the recess 13C.

At least the suction portion 140A of this recess detection suction cup 140
(near the suction surface) is made of a material with higher hardness than the transport suction cup 136 (JIS standard rubber hardness 55±5°), such as polyacecool (trade name Delrin or Tenac, ROCKW).
It is made of resin such as ELL (hardness: M75-90) and polyacetal copolymer (trade name: SILACON, hardness: M80). Therefore, when the suction part 140A is pressed against the backing member work 3, the suction i140A is deformed and all or part of the gap 141 between the suction part 140A of the recess detection suction cup 140 and the recess 13C is closed. There is no such thing.

As shown in FIG. 5, the conveying suction cups 136 are each connected to a suction pump 158 by a vibrator 156. This suction pump 158 is connected to the control device 130 and is controlled on and off by the control device 130. A suction detector 160 is connected between the conveyance suction cup 136 of the pipe 156 and the suction pump 158. This suction detector 160 is a well-known negative pressure sensor, and when the suction pressure inside the vibrator 156 becomes less than a predetermined value during suction, an internal limit switch is activated.
The detection signal is output to the control device 130.

Therefore, when the suction pressure in the vibrator 156 becomes less than a predetermined value due to a failure in taking out the sheet film F in the magazine 12, etc., the control device 130 A display device 131 connected to 130 displays information such as failure to take out the sheet film F.

On the other hand, the recess detection suction cup 140 is connected to a suction pump 164 through a pipe 162. This suction pump 16
4 is a control device 1 constituting a part of film presence/absence detection means;
30, and is controlled to be turned on and off by the control device 130. A suction detector 166, which constitutes a part of the film presence/absence detection means, is connected between the suction cup 140 for detecting the concave portion of the pipe 162 and the suction pump 164. This suction detector 166 is a well-known negative pressure sensor, and when the suction pressure inside the vibrator 162 falls below a predetermined value, an internal limit switch is activated and outputs a detection signal to the control device 130. It looks like this.

Therefore, if the suction part 140A of the recess detection suction cup 140 comes into contact with the recess 13C of the abutment member 13 and air leaks from the gap 141 between the suction part 140A and the recess 13C, based on the detection signal of the suction detector 166, The control device 130 displays the sheet film F in the magazine 12 on the display device 131.
It is designed to display that the device is not present and to stop the device.

This embodiment operates as follows.

When the magazine 12 is moved in the direction of the arrow in FIG. 6, the slide lid 12C of the magazine 12 is opened, and the magazine 12 is at the take-out position for the sheet film F, the conveyance suction cup 136 is moved to the first position by the rotation of the arms 134 and 142. 6. From the state shown in Figure 6, the holding means moves approximately vertically downward, picks up the sheet film F in the magazine 12 at the film take-out position, further rises, moves to the right, and holds the leading end of the picked up sheet film F. Send it to 16.

In this case, if the sheet film F is present in the magazine 12, the suction portion 140A of the recess detection suction cup 140 and the sheet film F come into close contact with each other, and the suction pressure within the vibrator 162 reaches a predetermined value. Therefore, the control device 130 displays on the display device 131 that the sheet film F is present in the magazine 12 based on the output of the suction detector 166.

On the other hand, when the sheet film F runs out in the magazine 12, the suction portion 140A of the recess detection suction cup 140 comes into contact with the recess 13C of the abutment member 13 disposed at the lowest layer of the sheet film F. As a result, the recess detection suction cup 1
Air leaks through the gap 141 between the suction portion 140A of the 40 and the recess 13C, and the suction pressure within the vibrator 162 becomes less than a predetermined value.

Therefore, based on the output of the suction detector 166, the control device 130 displays on the display device 131 that there is no sheet film F in the magazine 12, and also stops the device.

In this way, in this embodiment, the recess detection suction cup 14
0 is provided separately from the suction cup 136 for conveyance, and the suction part 140A of the suction cup 140 for recess detection is made of a material that is harder than the suction part of the suction cup 136 for conveyance. The gap 141 between the portion 140A and the recessed portion 13C is not closed. Therefore, the drop in suction pressure due to air leakage when there is no sheet film F can be reliably made greater than a predetermined value, and the accuracy of detecting the presence or absence of sheet film F in the magazine 12 can be improved.

Furthermore, in this embodiment, as shown in FIG. 5, the suction system of the conveyance suction cup 136 and the suction system of the recess detection suction cup 140 are made independent, so that when there is a sheet film F in the magazine 12, In the suction transport of the film, even if air leaks from the recess detection suction cup 140, the suction failure of the transport suction cup 136 can be prevented. Also,
It is also possible to detect failure to take out the sheet film F in the magazine 12.

In addition, the suction system of the conveyance suction cup 136 and the recess detection suction cup 1
When the suction system 40 is the same suction system, in order to prevent the sheet film F being conveyed from causing poor suction of the conveyance suction cup 136 due to air leakage from the concave detection suction cup 140, The detection suction cup 140 may be provided with a valve, and the recess detection suction cup 140 may be separated from the suction system of the transport suction cup 136 by this valve at times other than the recess pressure detection timing.

Furthermore, in this embodiment, since the suction part 140A of the recess detection suction cup 140 and the recess 13C of the abutment member 13 are provided at positions facing the peripheral edge of the film surface (non-image area) of the sheet film F, for example, When the sheet film F is an X-ray photographic film, the image area of the sheet film F necessary for X-ray photographic diagnosis will not be damaged by the contact pressure of the suction portion 140A of the recess detection suction cup 140. In addition, since the contact position of the suction part 140A of the recess detection suction cup 140 is the peripheral edge area of the film surface, even if pressure blur etc. occur due to the contact pressure of the suction part 140A, the area necessary for X-ray diagnosis can be removed. Does not affect the image. For this reason, a through hole, a notch, etc. may be used instead of the recess 13C.

In addition, in this embodiment, the suction part 1 of the recess detection suction cup 140
40A is made of resin such as polyacetal (trade name Delrin or Tenac, ROCKWELL hardness M75-90) or polyacetal copolymer (trade name SILACON, same hardness M80).
The material of A is not limited to this, but may be a material with higher hardness than the conveyance suction cup 136, such as methacrylic resin (hardness M
85 to 100), hard vinyl chloride resin (hardness M70 to 90), or metal.

〔Effect of the invention〕

Since the present invention has a trust structure, it has an excellent effect that the accuracy of detecting the presence or absence of a film in the film storage means can be improved without damaging the film.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing the main components of the film presence/absence detection device in the film storage means according to this embodiment, and FIG.
) and FIG. 2(B) are cross-sectional views taken along line ■-■ in FIG. FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. FIG. 7 is an exploded perspective view showing the main parts of the sheet film supply device to which the present invention is applied, and FIG. 8 is a correspondence between the cassette and the opening pin that is the lid opening mechanism. It is a perspective view of a lid open state showing the relationship. F...Sheet film, 10...Sheet film supply device, 12...Magazine, 13...Attaching member, 13C...Recessed portion, 130...Control device, 136...Sucker for conveyance, 140... Suction cup for recess detection, 140A... Suction part, 166... Suction detector. Figure Tomi Figure Figure 8 Old Figure

Claims (6)

[Claims] (1) Used in a film feeding device that sucks films stacked and housed in a film storage means one by one with a conveyance suction cup, and conveys the films to a predetermined position by moving the conveyance suction cup, A method for detecting the presence or absence of a film in a film accommodating means, which includes sucking the film or a concave portion of a film abutment member disposed at the lowest layer of the film, and detecting the presence or absence of a film in the film accommodating means based on the difference in suction pressure. A method for detecting the presence or absence of a film in a film accommodating means, characterized in that the recess is sucked by a recess detection suction cup, the suction part of which is made of a material harder than the conveyance suction cup. (2) The method for detecting the presence or absence of a film in a film accommodating means according to claim 1, characterized in that the suction systems of the conveyance suction cup and the recess detection suction cup are made independent. (3) A claim characterized in that the recess detection suction cup sucks a recess of a film contact member formed at a peripheral edge area of the film surface of the film or a position corresponding to a peripheral edge area of the film surface of the film. A method for detecting the presence or absence of a film in a film storage means according to item (1). (4) Used in a film supply device that sucks films stacked and stored in a film storage means one by one using a transport suction cup, and transports the films to a predetermined position by moving the transport suction cup, A film presence/absence detection device in the film accommodating means that sucks the film or a concave portion of a film abutting member disposed at the lowest layer of the film and detects the presence or absence of the film in the film accommodating means based on the difference in suction pressure. At least the suction part is made of a material with higher hardness than the transporting suction cup, and the film storage is performed based on the difference in suction pressure between the concave detection suction cup for suctioning the concave part and the concave detection suction cup. 1. A film presence/absence detection device in a film storage means, comprising: a film presence/absence detection means for detecting the presence or absence of a film within the means. (5) The suction system of the conveying suction cup and the suction system of the recess detection suction cup are each independent of each other.
4) A film presence/absence detection device in the film storage means described above. (6) The film in the film accommodating means according to claim 4, wherein the recess detecting suction cup and the recess of the film abutment member are provided at a position facing a peripheral edge area of the film surface of the film. Presence detection device.