JPH0532346A - Method for carrying sheet body - Google Patents

Abstract

PURPOSE:To enable a sheet body to be accurately and smoothly carried in a horizontal direction with simple constitution. CONSTITUTION:When a photosensitive material 14 is carried with the leading end thereof clamped by the first carrying roller pair 40, said end is held on one guide roller 48 of the pair 40, and synchronously shifted. When the material 14 is transferred to the other roller 50, both rollers 48 and 50 move in a parting direction. As a result, the roller 50 comes to hold the leading end of the material 14, and can properly and smoothly insert the end in space between the second carrying rollers 42 as a pair.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet conveying method capable of smoothly conveying a sheet horizontally by two pairs of conveying rollers arranged in a horizontal direction.

[0002]

2. Description of the Related Art In recent years, image information obtained from a computer tomography device or the like is displayed on a CRT display device or the like,
Image recording apparatuses have been widely adopted in which the displayed image information is exposed on a photographic light-sensitive material (for example, a film) and then developed to be used for medical diagnosis and the like.

In this image recording apparatus, sheet bodies stacked in a magazine, for example, a photographic photosensitive material are taken out by a sheet-fed mechanism, and the photographic photosensitive material is conveyed to an exposure position by a conveying mechanism.

In this case, the above-mentioned conveying mechanism is provided with two sets of conveying roller pairs which are separated from each other by a distance shorter than the length of the sheet body in the conveying direction, and from one conveying roller pair toward the other conveying roller pair. An image is recorded on a desired portion of the sheet body while sequentially advancing the sheet body.

However, in this type of transport mechanism, for example, when a sheet body is to be transported vertically, it is difficult to maintain the flatness of the sheet body because the sheet body is moved up and down in accordance with the photographic region to be divided. Has become. Therefore,
The technical idea to secure the flatness of the sheet body by pressing the front surface of the sheet body with a pair of mask rollers while supporting the back surface of the sheet body on the photographing path by pressing means, Japanese Patent Laid-Open No. 61-7
No. 7829 and No. 61-196232.

[0006]

By the way, when the sheet body is sent out by one of the pair of conveying rollers in order to horizontally convey the sheet body above the monitor television, the distance between the pair of conveying rollers is relatively large. The front end of the body hangs between the pair of transport rollers, making it difficult to reliably transfer the front end from one pair of transport rollers to the other pair of transport rollers. Therefore, this problem cannot be solved by directly applying the conveying mechanism disclosed in the above publication to the horizontal conveyance of the sheet body. For example, a new guide mechanism for holding the leading end portion of the sheet body is newly added. Need to be installed.

The present invention solves this type of problem, and an object of the present invention is to provide a sheet body conveying method capable of accurately and smoothly horizontally conveying a sheet body with a simple structure.

[0008]

In order to achieve the above object, the present invention provides at least one of the two pairs of conveying rollers arranged horizontally at a predetermined distance. The process of rotating the sheet body toward the other pair of conveying rollers and the two guide rollers arranged between the two pairs of conveying rollers are synchronized with the conveying operation of the sheet body. A process in which the sheet members are moved in a direction in which they are close to each other and are moved while holding one end in the transport direction of the sheet body by one guide roller, and the one guide roller reaches a substantially central portion of the two pairs of transport rollers. At this time, the process of stopping the movement of the guide roller to transfer the one end of the sheet body from the one guide roller to the other guide roller, and after the transfer of the sheet body is completed, The process of moving the drive rollers in a direction in which they are separated from each other in synchronization with the conveying operation of the sheet body and moving the one end of the sheet body while holding it by the other guide roller, and the process of being held by the other guide roller. And a step of holding the one end of the sheet body by the other pair of conveying rollers.

[0009]

In the sheet body conveying method according to the present invention, when the leading edge of the sheet body is conveyed while being sandwiched between the pair of conveying rollers, one guide roller holds the leading edge of the sheet body and synchronously. Be moved. Then, the sheet body moves from one guide roller to the other guide roller, and the two guide rollers move in a direction in which they are separated from each other, so that the other guide roller holds the leading end of the sheet body. As a result, this sheet body can be smoothly transferred between the other pair of conveying rollers.

[0010]

The sheet conveying method according to the present invention will be described in detail below with reference to the accompanying drawings in connection with an image recording apparatus for carrying out the method.

In FIG. 1, reference numeral 10 indicates an image recording apparatus for carrying out the sheet conveying method according to this embodiment. The image recording apparatus 10 includes a sheet-fed mechanism 16 for taking out the unexposed photographic light-sensitive material 14 stacked in a magazine 12 one by one, and the unexposed photographic light-sensitive material 14 taken out of the magazine 12 in a vertically downward direction. Transport mechanism 1
8 and the photographic light-sensitive material 14 conveyed in the vertical direction
To the exposure position P, a horizontal transport mechanism 20, an exposure mechanism 22 provided corresponding to the exposure position P for exposing image information or the like to the photographic material 14, and a magazine for containing the exposed photographic material 14. Transporting mechanism 2 for transporting into 24
6 and 6.

The sheet-fed mechanism 16 sucks the photographic light-sensitive material 14 and takes it out of the magazine 12, and a displacement means 30 for moving the suction-disk 28 forward and backward with respect to the photographic light-sensitive material 14 in the magazine 12. And a swinging means 32 for giving a swinging motion to the photographic photosensitive material 14 held by the suction plate 28.

The transport mechanism 18 includes a pair of rollers 34 for receiving the photographic photosensitive material 14 taken out by the sheet feeding mechanism 16,
A belt 3 for conveying the photographic light-sensitive material 14 vertically downward.
6, 38 and the like, and the front end side of the photographic photosensitive material 14 is made to face the first conveying roller pair 40 which constitutes the horizontal conveying mechanism 20. A second pair of transport rollers 42 is arranged at a predetermined distance L from the first pair of transport rollers 40 in the horizontal direction.
This interval L is selected to be shorter than the length of the photographic photosensitive material 14 in the conveying direction.

As shown in FIG. 2, the first conveying roller pair 40
The endless timing belt 44 is engaged with the roller 40a forming the second conveyance roller pair 42 and the roller 42a forming the second conveying roller pair 42, and the pulse motor 46 is connected to the end portion of the timing belt 44. Two guide rollers 48 and 50 are arranged between the first conveying roller pair 40 and the second conveying roller pair 42. Both ends of each of the guide rollers 48 and 50 are rotatably supported by holders 52 and 54. The holders 52 and 54 are fixed to both side portions of the endless timing belt 56, which face each other. This timing belt 56
Is connected to the pulse motor 58.

The holders 52, 54 are guided by a linear guide groove 60 extending in the horizontal direction, and are restricted in their approaching distance by a locking plate 62. A guide plate 64 that is in sliding contact with the guide rollers 48 and 50 is disposed above the holders 52 and 54.
First sensor 66 for detecting guide roller synchronization such as photo interrupter, and second sensor 6 for detecting reference position of photographic photosensitive material
And 8 are arranged at predetermined positions.

The exposure mechanism 22 includes an image display section 72 for displaying image information on the CRT display 70, and the CRT.
An optical system 76 that exposes the image information displayed on the display 70 to the photographic photosensitive material 14 via the imaging lens 74. The image display unit 72 and the optical system 76 are each movable in the vertical direction in the drawing along the guide rail 78, and the image display unit 72, the optical system 76 and the guide rail 7 are provided.
The whole 8 can be moved along the guide rail 80 in the direction perpendicular to the paper surface in the figure. Therefore, during exposure, the image display unit 72 and the optical system 76 can be moved to the optimum positions required for exposure.

The transport mechanism 26 includes a motor 82, and a belt 84 engages with the motor 82. Below the belt 84, the belt 8 rotated by a motor (not shown)
6, 88 and the like are arranged, and the accommodating magazine 24 is arranged below the accommodating magazine 24.

Next, the operation of the image recording apparatus 10 thus constructed will be described with reference to the sheet conveying method according to this embodiment.

First, a plurality of laminated photographic light-sensitive materials 14 are loaded into the image recording apparatus 10 through the magazine 12, and then the outlet of the magazine 12 is opened and the sheet-fed mechanism 16 is opened. Under the action of the displacing means 30 constituting the above, the suction plate 28 enters the magazine 12 from this take-out port, and the uppermost photographic photosensitive material 14 is sucked. Next, after the suction plate 28 is displaced upward while holding the photographic photosensitive material 14, the suction plate 28 is horizontally swung and displaced under the action of the swinging means 32. As a result, the photographic photosensitive material 14 held by the suction plate 28 is given a fluttering motion, and it is possible to reliably prevent the two sheets from being fed.

The photographic light-sensitive material 14 taken out from the magazine 12 by the sheet-fed mechanism 16 is conveyed vertically downward through the roller pair 34, belts 36, 38, etc. constituting the conveyance mechanism 18, and this photographic light-sensitive material is conveyed. The front end side of 14 is inserted between the pair of first transport rollers 40 that constitute the horizontal transport mechanism 20.

Then, the pulse motor 46 is driven, and the first and second conveying roller pairs 40 and 42 are rotationally driven via the timing belt 44. Therefore, the photographic photosensitive material 14 inserted between the first conveying roller pair 40 is
Is conveyed horizontally. When the first sensor 66 detects the leading end of the photographic photosensitive material 14, the pulse motor 58 is driven, and the guide roller 48 is synchronized with the leading end of the photographic photosensitive material 14 via the timing belt 56. The movement starts in the A direction (see FIG. 3a). At that time, the guide roller 50 moves in the direction approaching the guide roller 48 via the timing belt 56 (the direction opposite to the arrow A direction).

When the guide rollers 48, 50 move in the directions approaching each other and reach the position for engaging the locking plate 62, the movement is stopped. On the other hand, the photographic photosensitive material 14 is conveyed in the direction of arrow A via the first conveying roller pair 40, and the leading end thereof is guided by the locking plate 62 on both side edges. At this time, the fact that the photographic photosensitive material 14 has reached the reference position is detected via the second sensor 68 (FIG. 3b).
reference).

Next, when the front end of the photographic photosensitive material 14 is conveyed onto the guide roller 50, the pulse motor 5
8 is rotated in the opposite direction to the timing belt 56.
The guide roller 50, which is fixed to, moves synchronously with the photographic light-sensitive material 14 in the direction of arrow A and holds the leading end of the photographic light-sensitive material 14 together with the guide plate 64. The guide roller 50 guides the photographic photosensitive material 14 to a position close to the second conveying roller pair 42 (see FIG. 3C), and the photographic photosensitive material 14 is sandwiched by the second conveying roller pair 42 and conveyed by the conveying mechanism 26. Sent to the side.

During this time, when a desired portion of the photographic light-sensitive material 14 is arranged by the horizontal transport mechanism 20 in correspondence with the exposure position P, the photographic light-sensitive material 14 is exposed through the exposure mechanism 22.
Image information and the like are exposed and recorded on a desired portion of the photographic material, and further, the photographic photosensitive material 14 is conveyed by a predetermined distance in the direction of arrow A under the action of the horizontal conveying mechanism 20, and the image information and the like are exposed and recorded on other portions. To be done. That is, the photographic light-sensitive material 14
The recording operation is performed while intermittently advancing the frames by a predetermined distance in the direction of arrow A.

The photographic light-sensitive material 14 after the recording operation is completed is a belt 84 which is engaged with a motor 82 constituting the transport mechanism 26.
And it is carried into the storage magazine 24 via the belts 86, 88 and the like.

In this case, in this embodiment, the first and second
The leading end portion of the photographic photosensitive material 14 that is horizontally transported via the transport roller pair 40 and 42 can be effectively held by the guide rollers 48 and 50 and the guide plate 64 that move in synchronization with the leading end portion. For this reason, it becomes possible to surely insert the tip of the photographic photosensitive material 14 which is frame-fed in the direction of the arrow A between the second conveying roller pair 42, and a dedicated guide for holding the tip of the photographic photosensitive material 14 is provided. This photographic light-sensitive material 1 has a simple structure and does not require a new mechanism.
The effect of being able to prevent the conveyance failure of No. 4 as much as possible is obtained.

Moreover, the tip of the photographic light-sensitive material 14 is the second
After moving to the conveying roller pair 42 side, the first and second conveying roller pairs 40 and 42 move in a direction in which they are separated from each other.
Therefore, tension acts on both ends of the photographic photosensitive material 14, and the recording surface of the photographic photosensitive material 14 can be forcibly flattened. As a result, the recording operation of image information and the like on the photographic photosensitive material 14 can be performed with higher accuracy.

Further, in order to take a picture at a predetermined portion of the photographic light-sensitive material 14, the photographic light-sensitive material 14 is conveyed horizontally 20.
The front or rear end of the photographic light-sensitive material 14 may be disengaged from the conveying roller pair 40 or 42 when being moved by. The guide rollers 48 and 50 also have a function of guiding the end portions of the photographic photosensitive material 14 which are separated from the conveying roller pairs 40 and 42 so as to be held again by the conveying roller pair 40 or 42.

[0029]

According to the sheet conveying method of the present invention, two guide rollers arranged between two pairs of conveying rollers spaced apart from each other are brought close to each other in synchronization with the conveying operation of the sheet. By moving the sheet body in the separating direction, the front end portion of the sheet body can be effectively held, and the sheet body can be reliably delivered from one conveying roller pair to the other conveying roller pair. .. This allows
It is not necessary to use a special guide mechanism, the sheet body can be smoothly conveyed horizontally with a simple structure, and it becomes possible to effectively prevent conveyance failure of the sheet body.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an image recording apparatus for carrying out a sheet conveying method according to the present invention.

FIG. 2 is a partial perspective view of a horizontal transport mechanism that constitutes the image recording apparatus.

FIG. 3 is an operation explanatory diagram of the sheet conveying method.

[Explanation of symbols]

 10 ... Image recording apparatus 12 ... Magazine 14 ... Photosensitive material 16 ... Sheet-fed mechanism 18 ... Conveying mechanism 20 ... Horizontal conveying mechanism 22 ... Exposure mechanism 24 ... Storage magazine 26 ... Conveying mechanism 40, 42 ... Conveying roller pair 44 ... Timing belt 46 ... Pulse motor 48, 50 ... Guide roller 56 ... Timing belt 58 ... Pulse motor 64 ... Guide plate 66, 68 ... Sensor

Claims (1)

Claim: What is claimed is: 1. At least one of the two pairs of conveying rollers arranged horizontally at a predetermined interval is rotated, and at least one of the pair of conveying rollers is rotated toward the other pair of conveying rollers. A step of conveying the sheet body, and two guide rollers arranged between the two pairs of conveying rollers are moved in a direction in which the two guide rollers are brought close to each other in synchronization with the conveying operation of the sheet body, and the sheet is conveyed. A process of moving one end of the body in the carrying direction while holding it by one guide roller, and stopping the movement of the guide roller when the one guide roller reaches a substantially central portion of the two pairs of carrying rollers. A process of delivering the one end of the sheet body from the one guide roller to the other guide roller; and, after the delivery of the sheet body is completed, the two guide rollers convey the sheet body. And a step of moving the one end of the sheet body while being held by the other guide roller in synchronization with each other, and the other end of the sheet body held by the other guide roller. And a step of nipping it between the pair of transport rollers.