JPS6129492B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sheet film conveying device used in an X-ray imaging apparatus that performs X-ray imaging using a sheet film.

This type of device prepares multiple sheet films that have not yet been imaged, and when taking images, takes out the sheet films one by one, holds them in a close contact holder that holds and moves the films, and waits in a standby position for X-ray television. When the desired state is achieved while observing the fluoroscopic image of the affected area of the subject using a fluoroscopic device, the contact holder is sent to the imaging position, and at the same time, a sufficient dose of X-rays is irradiated for imaging, and imaging is performed again. In this device, the close contact holder is returned to the standby position, the photographed film is removed, and the photographed film is replaced with the unphotographed film, and the above-mentioned operations are repeated while photographing is continued.

FIG. 1 is a diagram showing a schematic configuration of a conventional sheet film X-ray imaging apparatus. Its structure and operation will be explained as follows. That is, in the figure, 1 is an unphotographed film storage case (hereinafter referred to as a feed magazine) that stores unphotographed sheet films 2, and a plurality of sheet films 2 stored in this feed magazine 1 are Starting from the upper film, the suction cup 3, which is movable in the up-down arrow U-D direction and the left-right arrow L-R direction, picks up one film at a time through an opening provided at the top of the feed magazine 1. and remove it. and,
When the suction cup 3 is moved to the position of the pair of transport rollers 4, the sheet film 2 can be held by the transport rollers 4. As a result, the sheet film 2 is held between the conveying rollers 4 and conveyed between the contact holders 5 which are placed open at the standby position 6. When the sheet film 2 is fed in, the top lid 5A of the close contact holder 5, for example, closes in the direction of arrow B, and the sheet film 2 is clamped therebetween. The camera waits at this standby position 6A until a photographing command is given.

When an imaging command is received, the contact holder 5 is sent to the imaging position 7A, which is the irradiation field position of the X-ray tube XT, and after the imaging is completed, it is returned to the standby position 6A. Here, the close contact holder 5 is opened, and at the same time, the conveyance roller 4 is reversely rotated. Then, the photographed film in the close contact holder 5 is picked up by the reversing conveyance roller 4 and taken out.
At this time, the direction switching plate 8 provided on the exit side of the conveyance roller 4 moves with the pivot 8A as a fulcrum,
The photographed sheet film that is being fed upward in the direction is guided to the guide 9 side by this direction switching plate 8.
As a result, the photographed sheet film is placed in the guide 9.
The photographed film storage case 10 (hereinafter referred to as a take-up magazine) provided at the bottom of the feed magazine 1 is guided and stored therein.

By the way, as shown in FIG. 1, each structure for moving the film consists of a feed magazine 1 and a pick-up magazine 10 arranged vertically in the figure.
From this position, the conveyance roller 4, the contact holder 5, its standby position 6A, and photographing position 7A are arranged on the same plane and in a straight line. Furthermore, in order to prevent X-ray fogging of the sheet film 2 during fluoroscopy, a large distance is provided between the standby position of the contact holder 5 and the photographing position. Therefore, the conventional sheet film X-ray imaging apparatus has the following drawbacks. In other words, this device is centered around the patient PA, along with the bed top plate BT on which the patient PA is placed, along with the arrow VW.
Although the feed magazine 1 and the take-up magazine 10 have their openings (film loading/unloading ports) facing down, they cannot be rotated in this inverted or vertical position. In this case, the sheet film 2 is bent and falls toward the opening side, and the film is disturbed, making it impossible to insert or take out the film, making it unusable.

Since the operating direction of the sheet film is linear, the device becomes longer in the direction of the arrow LR,
In particular, the Image Intensifier II, which is a heavy X-ray image-to-optical image conversion device for X-ray television, is installed at the imaging position 7 in Figure 1, and a bed top plate is arranged in a rollable manner at the imaging position. However, since the supporting method is adopted such that the side where the magazines 1 and 10 are arranged is fixed to the support frame for rotational drive operation in a form that faces the bed top plate, that is, with the side where the image intensifier II is installed as the free end side. Bending stress in the X-ray imaging device also increases, which tends to increase the strength of the support frame and complicate the attachment mechanism to the support frame.

Since the distance between the standby position and the photographing position is large, the moving distance of the contact holder is long, and therefore it takes a longer time to move from the standby position to the photographing position, and there is a great risk of losing the chance of photographing. It will have the following disadvantages.

Therefore, by arranging the feed magazine and take-up magazine perpendicularly to the moving direction of the close holder and changing the moving direction of the film by 90 degrees, we aim to downsize the device and shorten the moving distance of the close holder. The inside of the take-up magazine is equipped with a biasing mechanism to press the film stored therein against the exit side wall surface, and the film storage opening of the take-up magazine is equipped with a storage roller that guides the film sent into the magazine. An X-ray photographing apparatus has been proposed which is equipped with a film transport device which makes it easy to take in and take out films even when the magazine is at any rotation angle of 360°.

FIG. 2 is a diagram showing its specific configuration. In the figure, reference numeral 21 denotes an L-shaped casing of the X-ray imaging apparatus, one end of which is fixed and supported by a support frame SF that performs a rotational driving operation. 7B is X
The imaging position 6B of the radiography apparatus 21 is a standby position, and the standby position 6B is set at a close distance away from the irradiation field of the X-ray tube XT. 22 is a close contact holder for holding a sheet film, which is sent to the standby position 6B during fluoroscopy and to the imaging position 7B during imaging;
This close contact holder 22 is made of a material with good X-ray transmittance, such as aluminum, and is hinged on the imaging position side to open and close. Then, this hinge part is covered with a cover 22a made of heavy metal such as lead to perform X-ray shielding treatment to prevent exposure to X-rays from the X-ray tube XT.
X including secondary X-rays passing near the boundary of the exposure range
It is designed to prevent radiation exposure from radiation. Also X
An X-ray shielding plate 23 made of a heavy metal plate, such as a lead plate, is attached to the X-ray arrival side of the standby position 6B of the housing 21 of the radiography apparatus to prevent X-rays from entering the close contact holder 22 in the standby position 6B. There is. Reference numeral 24 denotes a pair of transport rollers provided on the side of the standby position 6B, which feed unphotographed sheet films into the contact holder 22 and take out photographed sheet films from the contact holder 22. 25 is a box-shaped feed magazine for storing a plurality of unphotographed sheet films FM ₁ , and 26 is a box-shaped take-up magazine for storing photographed sheet films FM ₂ . These magazines 25 and 26 are provided with a film outlet 25a and a film storage opening 26a, respectively.
The magazines 25 and 26 are arranged to face each other with the film storage opening 26a facing each other, and the film outlet 25a and the film storage opening 26a facing the transport roller 24 side, and the close contact holder 22
These magazines 25, 26 are installed in the housing 21 in such a position that the film surfaces within the magazines 25, 26 are perpendicular to the plane of movement of the magazines 25, 26. The feed magazine 25 has a film inside it.
A pressing plate 25b is provided for pressing the FM ₁ toward the film outlet 25a, and a biasing force is applied to the pressing plate 25b by an elastic body 25c, such as a leaf spring, provided in the feed magazine 25. ing. Further, the take-up magazine 26 is provided on the side of the feed magazine 25 so as to be movable forward and backward in the direction of arrows L-R, and its forward and backward movement can be adjusted using a knob 2 having a shaft 27A eccentric from the center of rotation.
The rotation is carried out on the shaft 27a in the direction of arrows C ₁ -C ₂ of 7. A pair of storage rollers 28 are arranged near the film storage opening 26a of the take-up magazine 26 and are used to feed the film. By moving forward and backward in the direction of arrow LR, it moves relatively in the direction of arrow GH, entering and leaving the magazine. Reference numeral 29 is a guide plate located on the delivery side of the storage roller 28 and fixed to the housing 21 to guide the photographed film FM ₂ into the take-up magazine 26. Reference numeral 30 is a film outlet 25a of the feed magazine 25. The sheet film FM ₁ is picked up and taken out one by one by the suction cup 31, which reciprocates in the direction of the arrow J-K _. These are a pair of feed rollers that peel off the film from the suction cup 30 and send it out to the conveying roller 24 side, and this feed roller 31 is operable to move in the direction of arrow M--N for peeling and feeding the film. Reference numeral 32 denotes a pair of direction switching rollers for feeding the unphotographed sheet film FM ₁ fed out from the feed roller 31 to the conveyance roller 24 and for feeding the photographed sheet film FM ₂ fed out from the conveyance roller 24 to the storage roller 28. and this direction switching roller 32
One of the rollers 32A is configured to be able to switch its position in the direction of the arrow R-S, and the position indicated by the solid line receives the film FM ₁ from the feed magazine 25, and the position indicated by the dotted line receives the film FM 1 from the take-up magazine 2.
You can send film FM ₂ to 6. A guide 33 is provided between the direction switching roller 32 and the conveying roller 24, and guides the sheet films FM ₁ and FM ₂ being fed between them. 3
4 is a fluoroscopic X provided behind the imaging position 7B
An image intensifier for line television equipment. 35 is a cover for the storage roller 28, which is integrated with one roller 28A and is indicated by the arrow G-
It is movable in the H direction and also functions as a support for the photographed sheet film FM ₂ .

Here, the operation of the apparatus having the above configuration will be explained. First, the movement of the sheet film will be outlined as follows. The sheet film FM ₁ in the feed magazine 25 is pushed to the film outlet 25 by the pressing plate 25b which receives uneven force from the elastic body 25c.
It is always pressed against side a with an appropriate force. Therefore,
The X-ray imaging device is centered on the patient's PA, pointing at arrow V.
- No matter what rotation angle it is rotated in the W direction, the sheet film FM ₁ is always neatly aligned on the film outlet 25a side, and is stable without falling from the feed magazine 25 or being disturbed within the magazine. It carries the state. Therefore, feed magazine 2
The sheet films FM ₁ in 5 can be suctioned and taken out one by one by the suction cup 30 which is moved in an arc in the direction of arrow E, starting from the top surface. This taken out sheet film FM ₁ is held by a feed roller 31. At this time, the feed roller 31 moves in the direction of arrow M, away from the suction port of the suction cup 30, peels off the film surface from the suction cup 30 that is suctioning the sheet film FM ₁ , removes the negative pressure of the suction cup 30, and removes the negative pressure from the suction cup 30 to release the sheet film. film
Safely peel off FM ₁ . Then, the feed roller 3
1, the sheet film FM ₁ is sent to the direction switching roller 32. At this time, the direction switching roller 32
is at the solid line position, and the sheet film that was sent is
FM ₁ is sent out to the conveyance roller 24 side via the guide 33. Although there is an angular difference of more than 90° in the conveyance direction of the sheet film FM ₁ between the direction switching roller 32 and the conveyance roller 24 , the sheet film FM ₁ is conveyed to the conveyance roller 24 while being guided by the guide 33 . Then, the close contact holder 22 is held by the conveyance roller 24 in the open state of the standby position 6B.
This sheet film FM ₁ is fed inside. When the sheet film FM ₁ is fed, the close contact holder 2
2 closes the upper lid 22A in the direction of arrow B and enters a standby state.

Next, when an imaging command is given from an operation console (not shown), the contact holder 22 is immediately moved to the imaging position 7B, and then X-rays are emitted from the X-ray tube XT to perform imaging. When photographing is completed, the contact holder 22 is returned to the standby position 6B, opened, and the sheet film FM ₂ inside is taken out. The taken-out sheet film FM ₂ is conveyed by the conveying roller 24 within the guide 33 to the direction switching roller 32. At this time, one roller 32A of the direction switching roller 32 is moved to the dotted line position,
Sheet film FM ₂ entering the direction switching roller 32
is sent to the storage roller 28 side. Then, the storage roller 28 further feeds the fed sheet film FM ₂ , but the tip of the sheet film FM ₂ comes into contact with a guide plate 29 provided near the exit of the storage roller 28, is bent inside the take-up magazine 26, and is inserted into the magazine. be guided. Here, operate the knob 27 according to the amount of sheet film FM ₂ stored,
The roller cover 35 presses the sheet film with appropriate pressure.
Adjust to set FM ₂ . Depending on the rotating state of the X-ray device in the direction of arrow V-W, the storage roller 28
In addition to operating the knob 27, one of the rollers 2
8A is controlled, and the sheet film FM ₂ is supported by the roller cover 35.

Thereafter, the above-described operations are repeated and photographing is performed.

As mentioned above, this device has feed magazine 2.
By constantly pressing the film in 5 with an appropriate pressure by the pressing plate 25b, the film remains stable at any rotation angle of 360 degrees, and can be stably taken out by the suction cup. Also,
The take-up magazine 26 can be adjusted forward and backward in the directions of arrows L-R by rotating the knob 27, and since the storage roller 28 is in a fixed position, one roller is inserted into the take-up magazine 26. The lever roller can hold down the sheet film in the magazine, and the lever 27 and storage roller 2 can be pressed down depending on the storage state of the sheet film.
By adjusting 8, it is possible to adjust the pressure that presses the roller and the sheet film in the magazine, so the sheet film FM ₂ in the take-up magazine 26 can be stored stably at any rotational position of 360 degrees. In addition, it is also possible to feed the sheet film anew, and therefore a series of sheet film movement operations can be carried out smoothly.

In addition, the back part of the close contact holder 22 is made of lead.
By providing the radiation shielding cover 22a to prevent the incidence of scattered radiation, the distance between the imaging position and the standby position can be shortened, and the close contact holder 22
The feeding time to the shooting position can be shortened, and by arranging the feed magazine and take-up magazine perpendicular to the moving surface of the close contact holder 22, the overall length of the device can be shortened. Therefore, even if the heavy image intensifier 34 is attached to the casing 21, the bending moment of the casing is reduced, and the mechanical strength of the support frame F can also be reduced.

By the way, such a device is called Feed Magazine 2.
The sheet film from No. 5 is sent to the close-contact holder 22 through a conveyance path that changes at an angle of 90 degrees, and from the close-contact holder 22 through this conveyance path, it is stored in a take-up magazine 26 located at a position facing the feed magazine 25. be done. Therefore, the conveyance roller 24 and guide 33 are used to change the conveyance direction of the film by nearly 90 degrees and send it out, but in order to operate the device without failure and to obtain high reliability, the conveyance roller 24 and the guide 33 are simply used to change the conveyance direction of the film by nearly 90 degrees. In the guide 33, there is a risk that the film may become jammed when the film runs along the guide 33.

The present invention has been made in view of the above circumstances, and provides a sheet film conveying device that can smoothly feed a sheet film into a close-contact holder, and feed the sheet film from the close-contact holder to a take-up magazine. The purpose is to

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 3 to 5. FIG. 3a is a perspective view showing the direction changing mechanism section of the conveying mechanism according to the present invention;
Figure b is an A-A arrow diagram of the same. In the figure, 101 is a pair of friction wheels, 102 is a shaft that fixedly supports these friction wheels 101, 103 is a pair of pulleys, and 104 is a fixed support for these pulleys 103. A shaft, 105 is a pair of pulleys, and 106 is a shaft on which these pulleys 105 are fixedly supported. 107 is a pair of pulleys for adjusting the tension of the belt, which will be described later, and 108 is a shaft that fixedly supports these pulleys 107. 106
is a belt wrapped around the pulleys 103, 105, 107, and as shown in the figure, this belt 109 is held by the pulleys 103, 105 so as to be in contact with the friction wheel 101 over the outer circumference and 1/3 of the circumference thereof. has been done. Also, the belt 109 is attached to the pulley 1
The tension is adjusted by 07.

As a result, the sheet film is held at both ends between the belt 109 and the outer periphery of the friction wheel 101, and is conveyed in the rotational movement direction as these rotate. Since the sheet film touches about 1/3 of the area, the direction of the sheet film is changed by approximately 90 degrees at this point. 33 is the aforementioned pair of guides, and 110 is an auxiliary guide plate disposed near the friction wheel 101;
This is to guide the central portion of the sheet film being conveyed along the conveyance path while the end thereof is being held between the belt 109 and the belt 109 so that it can be smoothly fed out. Although the details will be described later, this auxiliary guide plate 110 is used to smoothly feed the sheet film fed through the guide 33 between the friction wheel 101 and the belt 109 when feeding it to the close holder side. Retract one end of the sheet to position B to prevent the sheet film from connecting with the end.
In addition, when sending the sheet film taken out from the close contact holder to the take-up magazine 26,
The auxiliary guide plate 110 is rotated according to the feeding direction so that the sheet film enters the guide 33 reliably by positioning the auxiliary guide plate 110 at the position shown in FIG.

FIGS. 4a and 4b are a side view and a front partial cross-sectional view showing the detailed structure of the direction changing mechanism, and the same parts as in FIG. In the figure, a motor 111 is a drive source and rotates the pulley 103. 112 is a gear attached to the rotating shaft of this motor 111;
Reference numeral 3 denotes a support substrate, and the shafts 102, 104, and 106 are respectively attached to this support substrate 113 via bearings. 114 is the shaft 10 of the pulley 103
A gear 115 is a shaft that holds the auxiliary guide plate 110 and is rotatably attached to the support substrate 113. It is being Reference numeral 116 denotes a transmission gear rotatably mounted on the shaft 115 and having a friction clutch plate 116a.
The rotation of the pulley 103, which is rotated by the belt 109, is transmitted to and rotated by the gear 114 which is fixedly attached to the pulley 103. 117 is a friction wheel 120, 121 which is rotatably attached to the shaft 115 and comes into contact with the friction clutch plate 116a of the transmission gear 116;
122 is a nut screwed onto the shaft 115, and 122 is a coil spring for biasing the friction wheel interposed between the nut 121 and the friction wheel 117. These 115 to 122 are used to switch the position of the auxiliary guide plate 110. It constitutes a mechanism. The details of this position switching mechanism are shown in FIG. Since the position switching mechanism only needs to rotate the auxiliary guide plate 110 by a predetermined angle, a lever 123 is provided protruding from the shaft 115 so that the auxiliary guide plate 110 can be rotated by this predetermined angle and then stopped.
Further, a stopper pin 124 is attached to the support board 113, and the lever 123 is attached to the stopper pin 124.
The rotation of the shaft 115 in the counterclockwise direction in the drawing is prevented by contacting the friction wheel 104, and the rotation of the shaft 115 in the clockwise direction by more than a predetermined angle is prevented by causing the shaft 102 of the friction wheel 104 to protrude from the support substrate 113. The configuration is such that this is done by coming into contact with this protruding portion. Further, the friction wheel 117 of the position switching mechanism is provided with an elongated hole along its axial direction, and the lever 123 is attached to the shaft 115 using this elongated hole. As a result, the friction wheel 117 receives the biasing force of the coil spring 122 and applies an appropriate force to the friction clutch plate 116 of the transmission gear 116.
When the transmission gear 116 rotates, the friction wheel 117 and the coil spring 12
2. Due to the interaction of the nut 121, its rotational force is transmitted to the shaft 115, and the shaft 115 can be rotated within the range in which the lever 123 can be rotated. When the lever 123 comes into contact with the stopper pin 124 or the shaft 102, the transmission gear 116 becomes idling due to the aforementioned friction clutch mechanism, so that only the transmission gear 116 rotates and no rotational force is transmitted to the shaft 115. Therefore, this part constitutes a kind of friction mechanism. The pulley 105 is rotatably mounted via a bearing on a shaft 106, and this shaft 106 is made to protrude from the support substrate 113, and this protrusion portion and the protrusion portion of the shaft 102 from the support substrate 113 are connected to each other. A tension spring 125 is placed between the tension springs 125 and 125 to pull the shaft 106 upward in the figure.
01 with an appropriate force.

Next, the operation of this apparatus having the above configuration will be explained. This device rotates gears 112 and 114 by rotating a motor 111. Then, the shaft 104 to which the gear 114 is fixed is rotated. A pulley 103 is attached to this shaft 104,
Therefore, the belt 1 wrapped around the pulley 103
09 is driven and moved as the pulley 103 rotates. When the belt 109 is driven, the friction wheel 101 in contact with the belt 109 is also driven by the frictional force.

On the other hand, as the gear 114 rotates, the transmission gear 116 of the position switching mechanism also rotates. As a result, as described above, the force is transmitted to the shaft 115 holding the auxiliary guide plate 110 by the action of the friction wheel 117 that is in frictional contact with the friction clutch plate 116a of the transmission gear 116, the coil spring 122, and the nut 121. As a result, the shaft 115 is rotated,
The auxiliary guide plate 110 is rotated by the rotation angle of the shaft 115. When the shaft 115 rotates by a predetermined angle, the lever 123 protruding from the shaft 115 contacts either the stopper pin 124 or the shaft 102 depending on the direction of rotation, and prevents further rotation.
The transmission gear 116 idles. As a result, the auxiliary guide plate 110 is rotated to a predetermined position according to the feeding direction of the belt 109 and then stopped.

That is, when the sheet film is sent to the close contact holder, it is sent through the guide 33 to the friction wheel 101 side, the sheet film is held between the friction wheel 101 and the belt 109, and the direction is changed by approximately 90 degrees before being sent out. At this time, unless the auxiliary guide plate 110 is located at a distance from the friction wheel 101, the belt cannot be properly fed between the friction wheel 101 and the belt 109. However, in this case, the friction wheel 101 is rotated counterclockwise and the pulley 103 is rotated clockwise, and therefore the gear 114 is rotated clockwise, so the transmission gear meshed with the gear 114. 116 is rotated counterclockwise, so that the auxiliary guide plate 1 is rotated in the same direction as the transmission gear 116.
10 rotates to a predetermined position away from the friction wheel 101 and stops. As a result, the guide 33
The sheet film fed through the belt smoothly enters between the friction wheel and the belt and is sent to the close contact holder without any hindrance.

Next, when sending the sheet film from the close-contact holder to the take-up magazine, the sheet film is placed on the auxiliary guide plate 110.
The auxiliary guide plate 110 must be rotated to a position close to the friction wheel 101. In this case, the friction wheel 101
Since the rotation direction of the transmission gear 116 is clockwise, the rotation direction of the transmission gear 116 is also clockwise, and the auxiliary guide plate 110 is rotated to a predetermined position close to the friction wheel 101 and stopped. It can be fed smoothly into the guide 33.

This direction changing mechanism is used in an X-ray imaging device in which a magazine for storing sheet film is placed above the standby position of a contact holder, and changes the direction of movement of the sheet film over approximately 90 degrees while it is being transported. As a part, a pair of friction wheels are arranged corresponding to the positions of both ends of the film, and a belt, which is held by pulleys at both ends of each friction wheel, is arranged so that the outer periphery of the belt is in contact with approximately 1/3 of the friction wheel. In addition, an auxiliary guide plate is provided in the middle part of the pair of friction wheels for guiding the sheet film whose end is held between the friction wheels and the belt, and a guide plate is provided in the intermediate portion between the friction wheels and the belt. The auxiliary guide plate is rotated in the opposite direction to a predetermined position, and when the sheet film is guided from the magazine to the direction changing mechanism, the auxiliary guide plate is rotated to a predetermined position away from the friction wheel. The sheet film is guided smoothly to the auxiliary guide plate by moving the sheet film, and when the sheet film is sent from the close holder to the magazine via the direction changing mechanism, it is fed smoothly into the guide provided on the magazine side of the direction changing mechanism. Since the auxiliary guide plate is rotated to a position close to the friction wheel so that the sheet film It is possible to provide a sheet film conveying device having excellent features such as completely preventing failures caused by film clogging or the like.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a schematic configuration of a conventional X-ray imaging device, FIG. 2 is a diagram showing a schematic configuration of a compact X-ray imaging device, and FIGS. A perspective view and a sectional view taken along the line A-A of the embodiment; FIGS. 4a and 4b are a side view and a partial front sectional view showing the specific structure of the direction conversion mechanism; and FIG. 5 is an auxiliary guide plate. It is a front sectional view showing a position switching mechanism part of. 22... Close contact holder, 25, 26... Film storage case, 33... Guide, 101... Friction wheel, 103, 105... Pulley, 109... Belt, 110... Auxiliary guide plate, 111... Motor, 112, 114...gear, 115...shaft, 1
16...Transmission gear, 117...Friction wheel, 12
0,121...Nut, 122...Coil spring, 123...Lever, 124...Stopper pin.

Claims (1)

[Claims] 1. Take out sheet films one by one from a film storage case that stores unphotographed sheet films and send them to a close-contact holder for holding sheet films that moves between the photographing position and the standby position, and this close-contact holder is located at the photographing position. When an X-ray is taken, and after the completion of the imaging, the close contact holder is retracted to the standby position, the sheet film is taken out from the close contact holder and sent to the exposed film storage case, and both film storage cases are placed near the standby position of the close contact holder. In an X-ray imaging apparatus arranged such that the feeding direction of the sheet film intersects with the moving direction of the close contact holder, a pair of friction wheels are respectively arranged at opposing intervals near an end of the sheet film; A pair of belts arranged along the outer periphery of the friction wheels provided corresponding to the friction wheels, a pulley around which the belts are wrapped, and a pulley arranged near between the pair of friction wheels and the belt. an auxiliary guide plate that is sandwiched between the contact holder and one of the film storage cases and guides the sheet film conveyed between the close contact holder and one of the film storage cases; When feeding the sheet film to the film storage case, operate the auxiliary guide plate so that the side of the film storage case is opened by a predetermined angle from the friction wheel, and when feeding the sheet film to the film storage case, operate the auxiliary guide plate to open the film storage case side by a predetermined angle from the friction wheel. A sheet film conveying device comprising: a switching mechanism for returning the sheet film to the guide position and guiding the sheet film to the guide.