JP2741556B2 - Image recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image recording apparatus for recording image information of a recording original such as a check or a general document on a recording medium such as a microfilm.

[0002]

2. Description of the Related Art Conventionally, this type of apparatus has a configuration as shown in FIG. That is, when the subject S ₁ such as a check is placed on the sheet feeding table 1 inclined downward of the apparatus main body, the subject S ₁ moves in the direction of arrow a due to gravity, and the subject S ₁ moves in the direction of the sheet feeding roller 2 rotating counterclockwise in FIG. Are separated and sent one by one by a separation roller 3 rotating counterclockwise in the drawing, and then sent onto a conveyor belt 9 wound around belt drive rollers 7 and 8 by a pair of conveyor rollers 4 and 5. Then, the subject S ₁ includes the transport belt 9 and the belt driving roller 7.
The driven roller 6 is paired with the belt roller 10 and 1 to be transported to the photographing upstream transport section by the driven roller 6.
1. A transport belt 14 wound around a tension roller 12 and a lower large-diameter roller 13 and driven rollers 15, 16 forming pairs of belt rollers 10, 11, respectively. Send ₁ to the shooting unit.

When the subject S ₁ conveyed to the photographing unit passes through a pair of transparent parallel glasses 17, both front and back surfaces of the subject S ₁ are illuminated by a pair of illuminating lamps 18 disposed before and after the subject S ₁ , and the image light of the front and the back is illuminated. The film is exposed through an optical system (not shown). The photographed subject S ₁ is a belt roller 19,
20, a tension roller 21 and a transport belt 23 wound around an upper large-diameter roller 22 and a driven downstream roller 24 paired with the belt roller 19 are discharged to the outside of the apparatus main body by an imaging downstream transport unit. Discharged subject S ₁ hits the vertical plate 25a of the stacker 25, to orderly aligned stacked on the stacker 25.

Next, when photographing a subject S ₂ such as a thin general document, the subject S ₂ is slid over a horizontal manual feed stand 26 and fed between a driven roller 27 which is a pair of the transport belt 9 and the driving roller 8. , the shaft 28a of the object S ₂ are conveying path separation claw 28
The 3GS press rotates fed on the conveying belt 9 around, is then photographed in the same manner as above object S _1, it is discharged. A sensor 29 is provided downstream of the transport path separating claw 28. The sensor 29 detects the opening / closing timing of a shutter (not shown) of the photographing unit. Detects that the subject is manually fed. The transport path separating claw 28 normally forms the transport path of the automatic paper feeder at the position shown in FIG. 7, but when fed from the manual feed stand 26, it rotates about the shaft 28a and easily Pushed up.

Next, the drive system of the subject transport system is shown in FIG.
(The above-described transport roller and belt are indicated by broken lines), the main motor 31 rotates in the counterclockwise direction indicated by an arrow, and its power is fixed to the shaft 13a of the lower large-diameter roller 13 from the coaxial motor pulley 32 via the belt 35. The pulley 33 and the pulley 34 fixed to the shaft 22a of the upper large-diameter roller 22 are transferred to the conveyor belt 14 respectively.
And 23 are operated to convey the subject to the photographing unit by the conveyor belt 14 and discharge the photographed subject from the apparatus main body by the conveyor belt 23. The drive motor 36 rotates in the counterclockwise direction indicated by the arrow, and the motor pulley 3 is coaxial with the power.
7 is transmitted via a belt 40 to a pulley 38 fixed to the shaft 2a of the paper feed roller 2 and a pulley 39 fixed to the shaft 3a of the separation roller 3 to rotate the paper feed roller 2 and the separation roller 3, respectively. A gear 41 is integrally provided coaxially with the pulley 39, and the gear 41 meshes with a gear 42 integrally provided coaxially with the transmission pulley 43, and the gear 42 is rotatably loosely fitted on a shaft 44. I have. The rotation of the gear 39, the gear 41, the manual feed belt roller pulley 4 fixed to the shaft 8a of the belt drive roller 8 via the gear 42, the transmission pulley 43, and the belt 46.
Then, the transport belt 9 and the like are operated by the belt drive roller 8 to transport the subject. The pulley 38 is provided integrally and coaxially with the transmission pulley 47, and the rotation of the pulley 38 and the transmission pulley 47 is controlled by a belt 48.
Pulley 4 fixed to shaft 4a of transport roller 4 through
9 and thus to the transport roller 4.

Normally, the main motor 31 and the feed / conveyance section driving motor 36 are rotated so that the conveyor belt 9 and the belts 14 and 23 move at the same speed. However, the manual feed sensor 30
When a subject is placed on the camera and the user attempts to start shooting, a signal is sent from the manual feed sensor 30 to the control circuit 50 as shown in the block diagram of FIG. The rotation speed of the motor 36 is reduced so that the paper feeding speed becomes the same.

Next, the relationship between the signal from the paper sensor and the opening / closing timing of the shutter in the above-described conventional example will be described with reference to the timing chart of FIG. 10, the block diagram of FIG. 11, and the signal timing chart of FIG. , The length of the subject x, the distance from the sensor position to the entrance roller on the side of the constant conveyance speed y, and the distance from the entrance roller to the photographing center z.
In FIG. 10, point A indicates that the power is turned on, point B detects the leading end of the fed subject by the paper sensor, and point C detects the trailing end. The shutter detects the leading end of the subject at point B, and then determines the conveying speed v and the distance y + from the sensor to the center of shooting.
Open with a delay calculated by z, that is, (y + z) / v (point E). Then, after detecting the rear end of the subject at the point C, the subject similarly closes with a delay of time (y + z) / v (F
point). When the shutter is opened and closed at such a timing,
Although the image is taken on the film F as shown in FIG. 13, the image is actually stuck so that it is hard to see, or FIG.
As shown in (2), since the broken line portion of the image is lost, the margin times DE and FG are increased when the shutter is opened and closed, a certain image interval is maintained, and the shutter is actually opened at the point D and closed at the point G. In order to delay the signal from the paper sensor to the shutter control circuit, a shift register is used as shown in FIG. A clock signal having a constant pulse is always input to the shift register 51. For example, P is a signal for outputting a signal from the paper sensor with a delay of a time (6 pulses), and Q is a signal for outputting a signal from the paper sensor with b time. (7 pulses) These signals are output with a delay. The OR of these two signals is taken by an OR gate 52, and the obtained signal R is sent to a shutter control circuit 53 to open and close the shutter. This delays sending the signal of the paper sensor to the shutter control circuit 53, and opens the shutter longer than the time that the subject passes under the paper sensor.

[0008]

In the above-mentioned prior art, there is no problem if the object conveying speed is always constant. However, the conveying speed of the sheet feeding and conveying unit can be switched. Since the paper sensor is on the side of the transport system where the transport speed changes, there has been a problem that switching between the transport speeds changes the interval between captured images. Normally, in the case of automatic paper feeding, the feeding speed of the sheet feeding and conveying unit is equal to that of the other conveying units, and in the case of manual feeding, the conveying speed of the sheet feeding and conveying unit is reduced. The image interval on the recording medium is set based on the conveyance speed at the time of automatic paper feeding in which the conveyance speeds of the paper conveyance unit and the other conveyance units are equal. Therefore, as shown in FIG. 16, when the transport speed is switched to the manual feed speed, there is a disadvantage that the image interval is widened and the film is wasted. This will be described with reference to a timing chart shown in FIG. 15. It is assumed that the transport speed of the paper feed transport unit in FIG. Here, A _{1 to} G ₁ indicate the same operations as A to G in FIG. The interval between E ₁ H is the time required for the subject to actually pass through the photographing center. In short, the time required for the subject to pass under the paper sensor B ₁ C ₁ is different from the time E ₁ H required to pass through the center of the photographing because the transport speed is different, and the film is fed wastefully for _one hour HF. Will be done.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an image recording apparatus which does not waste film even when the transport speed of a subject is switched, in view of the above-mentioned problems of the prior art.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a transport unit for transporting a sheet-like subject, an illumination unit for illuminating the subject, and a recording unit for recording image information of the subject from the illumination unit. Having a drive source for each of a paper feeder located upstream of the illumination unit and a transporter other than the paper feeder, and the transport speed of the paper feeder is variable according to the subject. A paper detection sensor that determines the opening / closing timing of a shutter member that controls a recording time when the image information of the subject is recorded in the recording unit in the image recording apparatus, The shutter member is opened and closed according to the transport speed of the unit.

[0011]

In the image recording apparatus having the above construction, the passage of the subject is detected by the paper detection sensor, and the opening and closing of the shutter member is controlled in accordance with the transport speed of the subject. The image interval at does not change.

[0012]

1 to 3 show a first embodiment of the present invention.
It will be described based on. FIG. 1 is a block diagram of a main part of the present embodiment, FIG. 2 is a timing chart of the signal, and FIG. 3 is a timing chart of the operation. For the sake of simplicity, the same parts as those in FIG. First, to describe the relationship between the paper sensor 29 and the shutter 3, the case of the automatic paper, the velocity v of the conveyor portion of the other sheet feed conveyance unit are equal, conventionally B ₂
The paper sensor 29 detects the leading edge of the fed object at the point,
It detects the trailing edge of the object in the C ₂ points. In response to the detection signal, the circuit described later adds allowance times D ₂ E ₂ and F ₂ G ₂ to the passage time B ₂ C ₂ of the subject passing under the paper sensor 29, and the shutter opens at D ₂ , and G _2. close. On the other hand, in the case of manual paper feeding, the transport speed of the transport unit other than the paper transport unit is constant, but the transport speed of the paper transport unit decreases to v ′, so that the subject passes below the paper sensor 29 and is photographed. The time B ₂ E ₃ to reach the center is later than B ₂ E ₂ at the time of automatic paper feeding. Further, the time E ₃ H ₃ during which the subject passes through the photographing center is shorter than the time B ₂ C ₃ during which the subject passes under the paper sensor 29 by the transport speed shown in FIG. This E ₃ H ₃ has extra time D
₃ Add the E _3, H ₃ G _3, the shutter is opened at D _3, closed with G _3.

A circuit for opening and closing the shutter in accordance with these two states will be described with reference to FIGS. In FIG.
S1 is a signal input from the paper sensor 29 to the shift register 61, S2 is a clock signal from the clock 60, S3
〜S6 are preset output signals from the shift register 61. The selector 62 is a shift register 61
Of the selector 65, the input terminal of which is OR
The output terminal of the selector 62 is connected to the output terminal of the selector 62 via the circuit 63 and the AND circuit 64, and the output terminal is connected to the shutter control circuit 66. Terminal is selected. The mechanical configuration is the same as that of FIG. In the present embodiment having the above-described configuration, first, in the case of automatic paper feeding, the selectors 62 and 65 are connected to the terminals shown by broken lines, and the output signal from the shift register 61 is S4
S5 is selected, and the selector 65 selects the OR of the OR circuit 63.
The signal S7 is selected as an output signal and sent to the shutter control circuit 66. As a result, the shutter can be opened and closed with a sufficient time to pass under the paper sensor 29. On the other hand, in the case of manual sheet feeding, the selectors 62 and 65 are connected to terminals indicated by solid lines. Shift register 6
S3 and S6 are selected as the output signals from
In 5, the AND signal S8 of the AND circuit 64 is selected as an output signal and sent to the shutter control circuit 66. As a result, the shutter can be opened later than in the case of automatic sheet feeding, and the shutter can be closed in a shorter time than the time when the subject passes below the paper sensor 29. The signals S3 to S6
Is set arbitrarily according to the paper feed speed of automatic paper feed or manual paper feed.

FIG. 4 shows a second embodiment of the present invention. Unlike the first embodiment in which two-stage speed switching is performed, this embodiment is adapted to cope with a stepless speed change. Transfer speed data 80 to control circuit 79
, The pulse widths of the clock oscillators 81 and 82 are set by the output signals S13 and S24. Output signal S1
In steps S4 and S25, one of the output signals S16 and S17 of the shift registers 71 and 72 is selected by the selectors 73 and 74. OR circuit 75 or AND circuit 7 depending on output signal S15
6 is selected by the selector 77. The paper sensor 70 (see FIG.
29 is sent to the shift registers 71 and 72, and pulse signals are further input from the clock oscillators 81 and 82 to the shift registers 71 and 72. Signal groups S16 and S1 of shift registers 71 and 72
7, one of which is selected by selectors 73 and 74, and is used as signals S18 and S19 by an OR circuit 75 and an AND circuit 76.
And the output signals S20, AN from the OR circuit 75
One of the signals S21 from the D circuit 76 is supplied to the selector 77.
And is input to the shutter control circuit 78 to open and close the shutter. By changing the pulse widths of the clock oscillators 81 and 82, the opening and closing time of the shutter is adjusted, and the outputs of the shift registers 71 and 72 are adjusted by the selectors 73 and 72.
By selecting by 74, the delay time of the shutter opening / closing time can be adjusted after the subject passes below the paper sensor.

FIGS. 5 and 6 show a third embodiment of the present invention. This embodiment is performed without using a shift register, and will be described with reference to the block diagram of FIG. 5 and the flowchart of FIG. The paper sensor 90 (2 in FIG. 7 described above)
9 is input to the CPU 91. The CPU 91 has timers 92 and 93 built-in and its output signal S32 is input to the shutter control circuit 94. Is counted, and the timer 93 determines that the subject is the paper sensor 90.
It counts the time it takes to reach the shooting center after passing below. First, the carrying speed of the subject is inputted in # 1, and the shutter opening time t 'is calculated from the time t required for passing by this numerical value.
Is calculated. In step # 2, the time T of the timer 93 is determined. Next, in step # 3, the object is
When the vehicle starts passing below, a signal S31 from the paper sensor 90 is input to the CPU 91, the timer 92 is started, and the counting of the object passing time is started. At the same time, timer 9 in # 4
3 starts subtracting a preset time. A signal indicating that the subject has passed below the paper sensor 90 is output from the paper sensor 90.
The timer 92 is stopped at # 5 and the shutter opening time t 'is calculated from the time t required for passage at # 6. After passing under the paper sensor 90, the timer 93
Is reached, the output signal S32 is sent to the shutter control circuit 94 in # 7, and the shutter is opened. At the same time # 8, the timer 92 starts subtracting the time t required for the subject to pass under the paper sensor 90. When the calculated shutter release time t '= 0, the output signal S32 is sent to the shutter control circuit 94 in # 9, and the shutter is closed. In this manner, the shutter opening time and the shutter opening / closing timing can be determined and controlled based on the subject transport speed.

[0016]

As described above, according to the present invention, it is possible to change the shutter opening / closing timing in accordance with the transport speed when the subject passes through the paper transport unit detected by the paper detection sensor provided in the paper transport unit. Therefore, the image interval can be kept constant without being affected by the change in the transport speed, and the waste of the film can be eliminated.

[Brief description of the drawings]

FIG. 1 is a block diagram for operation of an image recording apparatus according to a first embodiment of the present invention.

FIG. 2 is a timing chart of the operation signal.

FIG. 3 is a timing chart for the operation.

FIG. 4 is a block diagram for operating an image recording apparatus according to a second embodiment of the present invention.

FIG. 5 is a block diagram for operation of an image recording apparatus according to a third embodiment of the present invention.

FIG. 6 is a flowchart illustrating the operation.

FIG. 7 is a configuration diagram of a conveyance path of a conventional image recording apparatus.

FIG. 8 is a configuration diagram of the drive system.

FIG. 9 is a block diagram for the same operation.

FIG. 10 is a timing chart of the operation.

FIG. 11 is a block diagram for shutter opening / closing control.

FIG. 12 is a timing chart of the signal.

FIG. 13 is an image view on a film without a margin time recorded by a conventional apparatus.

FIG. 14 is an image diagram on the film when the subject is skewed.

FIG. 15 is an operation timing chart when the transport speed in the conventional apparatus is changed.

FIG. 16 is a comparison diagram of images on a film when the transport speed is changed.

[Explanation of symbols]

S ₁ , S ₂ ··· sheet-shaped subject, 2 ··· feed roller, 3 ·
.Separation rollers, 9,14..Conveying belts, 29,70,
90 ··· paper sensor, 31, 36 · · motor, 61, 7
1,72 shift register, 62, 65, 73, 7
· · · · Selector, 63, 75 · · · OR circuit, 6
· · · · · AND circuit, 66, 78, 94 · · · shutter control circuit, 91 · · · CPU.

Claims (1)

(57) [Claims] 1. A sheet feeding apparatus comprising: a conveying section for conveying a sheet-shaped subject; an illuminating section for illuminating the subject; and a recording section for recording image information of the subject from the illuminating section. Unit and a transport unit other than the paper feed unit, each of which has a drive source, and wherein the transport speed of the paper feed unit is variable according to the subject, image information of the subject is stored in the recording unit. A paper detection sensor that determines the opening / closing timing of a shutter member that controls the recording time when recording is provided in the paper feed unit, and opens and closes the shutter member according to the transport speed of the paper feed unit. An image recording apparatus characterized by the following.