JP2554959B2 - Sheet transport device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet body conveying apparatus for delivering a sheet body taken out by, for example, a sheet-fed apparatus to a next-stage apparatus at a highly precise conveying speed.

[0002]

2. Description of the Related Art Sheets of unexposed photographic light-sensitive materials which are stacked and stored are taken out by a sheet-fed device and then conveyed to an exposure device, or sheets after image recording are taken out by a sheet-fed device. In order to convey the sheet body to the developing device, a sheet body conveying device is used.

That is, in the above-mentioned sheet-fed apparatus, after stacking sheet bodies in a magazine or on a tray at a sheet body placement position, the uppermost sheet body is placed under the suction action of a suction cup. Taken out of the site. next,
In the sheet body transporting device, the taken-out sheet body is delivered from the suction plate, and then, the sheet is transported at a transporting speed synchronized with the exposure device, the automatic developing device, or the like, and is discharged.

In this case, in the sheet body conveying device, when the sheet body is received from the suction plate in the sheet feeding device, the conveying system such as the conveying roller pair, the drum or the conveying belt is driven in synchronization with the moving speed of the suction plate. In addition, when the sheet body is transferred from the transport system to the exposure device, the automatic developing device, or the like, it is synchronized with the sheet body transport speed.

[0005]

By the way, the drive system constituting the sheet conveying apparatus of this type is usually driven by an induction motor, and the volume of a speed controller connected to the induction motor is operated. By doing so, speed adjustment is performed in an analog manner. However, since the rotation speed of the induction motor is adjusted in an analog manner as described above, particularly when the sheet conveying speed of the next stage device such as the exposure device and the automatic developing device is in a wide range from a relatively low speed to a high speed,
Corresponding to this, there is a problem that it becomes considerably difficult to adjust the sheet feeding speed in an analog manner. For example, the sheet body (for example, film) conveyance speed may be significantly different depending on the type of developing device connected, or the processing speed may be significantly different even with the same developing device due to gear replacement or the like.

Further, the sheet conveying speed of the automatic developing device or the like connected to the next stage has a very slight machine difference with respect to the reference conveying speed, and this machine difference is finely adjusted for precise synchronization. There is a need.

The present invention has been made in order to solve this kind of problem, and it is possible to easily and highly accurately synchronize the sheet delivery speed with the sheet delivery speed of the next-stage apparatus over a wide range. It is an object of the present invention to provide a sheet conveying device capable of performing the above.

[0008]

In order to achieve the above-mentioned object, the present invention provides a conveying system for feeding a sheet body received from a preceding apparatus to a succeeding apparatus, and a drive for driving the conveying system. Source and a plurality of sheet reference transport speed data of the next stage apparatus, and a control means having a storage circuit for storing rotation speed data of the drive source, and a sheet reference of the next stage apparatus. And a selection unit for selecting the transport speed from the storage unit.

[0009]

In the sheet conveying apparatus according to the present invention, first, the sheet conveyed from the preceding apparatus is driven at a predetermined speed, for example, an average speed of 420 mm / sec via the conveying system under the action of a driving source such as a pulse motor. The above is carried. Next, based on the speed data selected by the selection means, the feeding speed of this sheet body is matched with the sheet body conveyance speed of the next stage device under the driving action of the control means, and the sheet body is moved to the next stage. Delivered to the device. In this case, when the actual sheet conveyance speed of the next-stage device is deviated from the reference conveyance speed, the fine adjustment means finely adjusts the sheet conveyance speed. As a result, the sheet delivery speed of the sheet transport device is easily and accurately synchronized with the plurality of sheet reference transport velocities stored in the storage unit of the next-stage device.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The sheet conveying apparatus according to the present invention will be described in detail below with reference to the accompanying drawings.

In FIG. 1, reference numeral 10 indicates a sheet body single-wafer conveying system incorporating the sheet body conveying apparatus according to this embodiment. This sheet body single-wafer conveying system 10
A sheet body sheet-fed device 14 for holding and taking out the uppermost photographic light-sensitive material 12 of the laminated photographic light-sensitive material (sheet body) 12 after the completion of image recording, and receiving the taken-out photographic light-sensitive material 12 Automatic developing device 1 which is a stepped device
And the sheet body conveying device 16 according to the present exemplary embodiment.

This sheet body sheet-fed device 14 is equipped with a suction plate 18 for holding the photographic photosensitive material 12 by suction.
8 is moved back and forth and oscillated by the drive means 20.
The drive means 20 includes a rotary drive source 24, and a rotary shaft 26 connected to the rotary drive source 24 has a guide bar 2 attached thereto.
8 is inserted, the holder 30 is fixed to the guide bar 28, and the rod 3 placed in the holder 30 is fixed.
The end of 2 is inserted into the guide groove 34 having a substantially L-shape, and the moving member 35 engages with the end of the rod 32.
The moving member 35 is fixed to a belt 36. The belt 36 is stretched around pulleys 38a and 38b, and a rotary drive source 40 is connected to the pulley 38a.

The sheet body conveying device 16 includes a conveying system 42 for feeding the photographic photosensitive material 12 received from the sheet body sheet-fed device 14 to the automatic developing device 100, and the conveying system 42.
For controlling the rotation speed of the pulse motor 44 and the ROM (storage means) 66 for storing a plurality of reference transfer speed data of the automatic developing device 100 connected to the next stage. And a selecting means 47 for selecting from the ROM 66 a sheet body feeding speed synchronized with the sheet conveying speed of the automatic developing device 100.

The transport system 42 includes a drum 48 having a relatively large diameter which is rotated by a pulse motor 44, and a first belt 50a and a second belt 50b are provided on the outer peripheral surface of the drum 48.
And the first and second belts 50
A and 50b are stretched around a plurality of rollers 52. A first sensor (for example, a photo interrupter) 54 for detecting the front end of the sheet and a second sensor (for example, a photo interrupter) 56 for detecting the rear end of the sheet are arranged in proximity to the drum 48. The transport system 42 has a guide plate 58,
The end of the guide plate 58 enters the discharge port 60.

As shown in FIG. 2, the control means 46 controls the CP
A ROM 66 that includes a U62 and stores various reference transport speeds of the automatic developing device 100 that is connected to the CPU 62 and that stores a program and the like for generating a pulse for driving a pulse motor; The RAM 68 is connected and the I / O port 7
The first and second sensors 54, 56 are connected via 0. Further, a connection signal from the automatic developing device 100 is supplied to the CPU 62. The CPU 62 is connected with the dip switch SW1 which is the selection means 47 and the dip switches SW2 to SWn which are the fine adjustment means 49 as required. The dip switch SW1 is used to select the basic carrying speed (or reference carrying speed) of the automatic developing device 100 at the latter stage of feeding the photographic photosensitive material 12, and the other dip switches SW2 to SWn are used for fine adjustment of the speed. Used to do. The fine adjustment in this case is performed within ± 5%, preferably within ± 3% of the reference transport speed. From this CPU 62 to the pulse motor driver 72
The pulse motor 44 is driven at a predetermined speed by the drive signal output to.

Next, the operation of the sheet body single-wafer conveying system 10 thus constructed will be described.

First, in the sheet body single-wafer conveying system 10,
After a plurality of photographic photosensitive materials 12 in a stacked state are loaded, the rod 32 and the pulley 38 are operated under the action of the rotary drive source 40 that constitutes the drive means 20 of the sheet body sheet feeding device 14.
It is displaced toward the uppermost photographic photosensitive material 12 side along the guide groove 34 via a, 38b and the belt 36. Then, the suction plate 18 sucks the uppermost photographic photosensitive material 12, and the rotary drive source 40 is driven in the opposite direction to the above, so that the rod 32 rises along the guide groove 34. As a result, the uppermost photographic light-sensitive material 12 sucked and held by the suction plate 18 is overlapped with the next photographic light-sensitive material 12 which is next to it.
It is peeled off and taken out upwards.

When the rod 32 reaches the corner of the guide groove 34, the rotary drive source 40 is deenergized, the rotary drive source 24 is driven to rotate the rotary shaft 26, and the suction disk 18 is guided. It swings through the bar 28 to the position indicated by the chain double-dashed line. At this point, the suction action of the suction plate 18 is released, and the pulse motor 44 of the sheet transporting device 16 is driven to start the transport of the photographic photosensitive material 12 by the transport system 42.

The tip of the photographic photosensitive material 12 is the first sensor 5
4 from the I / O port 70 to the CPU 6
2, the pulse motor driver 72 is supplied with a predetermined drive signal through a program read from the ROM 66, for example, and the photographic photosensitive material 12 is supplied with a predetermined conveying speed under the rotating action of the pulse motor 44. The sheet is conveyed in the arrow X direction at an average linear velocity of 420 mm / sec. When the rear end portion of the photographic photosensitive material 12 is detected by the second sensor 56, the pulse motor 44 is rotated in the opposite direction (the arrow Y direction) by the drive signal from the CPU 62, and the photographic photosensitive material is detected. The material 12 is conveyed to the discharge port 60 side along the guide plate 58. Here, the automatic developing device 100
Is in a state capable of receiving the photographic light-sensitive material 12, the shutter (not shown) is released, and the automatic developing device 100 is released.
The sheet feeding speed is synchronized with the sheet conveying speed (rotational speed of the roller pair 102), the photographic photosensitive material 12 is discharged from the discharge port 60, and the automatic developing device 100
Is inserted into.

In this case, in this embodiment, the reference carrying speed is selected by the dip switch SW1 connected to the CPU 62, and the reference carrying speed is finely adjusted by the dip switches SW2 to SWn, and the automatic developing device 100 is operated.
The sheet feeding speed is synchronized with the sheet feeding speed. For this reason, as in the case where various devices such as the automatic developing device 100 and the conveyer are used as the next-stage device, a wide range (for example, a linear velocity) from a relatively low sheet conveying speed to a considerably high conveying speed. Even from 9 mm / sec to about 250 mm / sec), the basic speed is set by the dip switch SW1 and finely adjusted (for example, ± 3 by the dip switches SW2 to SWn).
%), The effect that it is possible to respond accurately and easily is obtained. Moreover, DIP switch SW1
Since the speed is set by SWn, the adjustment is performed with higher precision than the conventional analog adjustment work, and thereby the sheet feeding speed that is accurately synchronized with the sheet conveying speed of the next apparatus can be obtained. Therefore, a smooth transfer work is performed.

Further, in this embodiment, the dip switch SW1 is used as the sheet reference transport speed selecting means 47, and the dip switches SW2 to SWn are used as the fine adjusting means 49.
, But using a plurality of DIP switches for selecting means 4
The remaining dip switches are used as the fine adjustment means 4
It may be used as 9.

In this embodiment, the dip switch SW1 is used for selecting and finely adjusting the sheet feeding speed.
Although SWn are used, it is also possible to store the data in the RAM 68 using a keyboard or the like and read the data by the CPU 62 to drive and control the pulse motor 44.

[0023]

According to the sheet conveying apparatus of the present invention, the following effects can be obtained.

The sheet body delivered from the former device is
Based on the speed selected by the selection means and finely adjusted by the fine adjustment means, the sheet is fed out under the driving action of the control means via a drive source, for example, a pulse motor, accurately synchronized with the sheet conveying speed of the next-stage apparatus. Therefore, it is possible to easily and accurately synchronize with the sheet conveying speed over a wide range of the next-stage device. As a result, it becomes possible to adjust the sheet feeding speed accurately and in a wide range, various devices can be used as the connecting device of the next stage, and the sheet body can be smoothly fed to the device of the next stage. You can

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a sheet body single-wafer conveying system incorporating a sheet body conveying device according to the present invention.

FIG. 2 is a block diagram of a control unit that constitutes the sheet conveying apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Sheet body sheet-fed conveying system 12 ... Photosensitive material 14 ... Sheet body sheet-fed apparatus 16 ... Sheet body conveying apparatus 18 ... Adsorption board 20 ... Driving means 42 ... Conveying system 44 ... Pulse motor 46 ... Control means 47 ... Selection means 49 ... Fine adjustment means 54, 56 ... Sensor 62 ... CPU 66 ... ROM SW1 to SWn ... DIP switch

Claims (2)

(57) [Claims] 1. A transport system for sending out a sheet body received from a previous stage device to a next stage device, a drive source for driving the transport system, and a plurality of sheet standard transport velocity data of the next stage device are stored. Storage means and a control circuit for controlling the rotation speed of the drive source, and a selection means for selecting the sheet reference transport speed of the next-stage apparatus from the storage means. A sheet conveying device characterized by the above. 2. The apparatus according to claim 1, further comprising: a fine adjustment unit for finely adjusting a sheet reference transport speed of the next-stage apparatus selected by the selection unit. apparatus.