JPH075074Y2 - Carrier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a conveying device, and more particularly to a conveying device such as a diazo copying machine capable of superposing and feeding an original and a photosensitive paper.

(Prior Art) As is well known, in a diazo copying machine which is one of the image forming apparatuses, it is possible to print and expose a document image in a state where a document and a photosensitive paper corresponding to the copying machine are superposed. It is being appreciated.

For this reason, the copying machine described above is provided with a conveying device for feeding the original document and the photosensitive paper from their respective feeding paths toward the stacking position.
There is a structure shown in the figure.

That is, FIG. 3 is a side view showing the above-mentioned transporting device, in which the feeding sections A for the original S1 and the photosensitive paper S2 are provided independently of each other, and the original S1 and the original S1 fed out from these feeding sections are provided. Before reaching the printing cylinder P in the feeding direction of the photosensitive paper S2, there is located a leading edge aligning section B for superimposing the original S1 and the photosensitive paper S2 with their leading edges aligned.

The above-described feeding unit A includes a feeding unit A1 for the document S1 and a feeding unit A2 for the photosensitive paper S2. The feeding unit A1 for the document S1 is, for example, with respect to the document S1 manually inserted. Feeding roller A10 that can approach and separate, and this feeding roller A10
Is composed of a feeding roller A11 and a rollable ball A12 that oppose the feeding path of the document S1 to correct the skew of the fed document S1, and the feeding of the photosensitive paper S2. The feeding section A2 includes a feeding path A20 arranged so as to merge with a feeding path of the document S1, and a photosensitive paper S2 in the feeding path A20.
The sheet feeding cassette A21 is located on the feeding side of the sheet feeding device, and the sheet feeding roller A22 that can be brought into contact with and separated from the upper surface of the photosensitive sheet S2 in the sheet feeding cassette A21.

The feeding roller A10 and the paper feeding roller A22 in each of the above-described feeding units are operated by a solenoid (not shown) to scan the document S1.
Further, the original S1 and the photosensitive paper S2 are respectively conveyed by setting the contact / separation position with respect to the photosensitive paper S2.

On the other hand, the leading edge aligning portion B of the original S1 and the photosensitive paper S2 described above is provided with a feeding roller B10 that opposes the feeding path corresponding to the overlapping position of the original S1 and the photosensitive paper S2, and the feeding roller B10.
Sub-feeding roller B1 that can be moved toward and away from 10
1, a support arm B12 having a rotary shaft of the sub-feeding roller B11 at one of the swing ends, and a matching piece B121 made of a bent piece at the other end, and is substantially integrated with the support arm B12. A feeding operation lever B13 that can be swung about a rotation axis B16 of the support arm B12, a solenoid B14 having an actuator hooked at one end of the feeding operation lever B13, and a sub-operation when the solenoid B14 is not excited. It is composed of a tension spring B15 for urging the feeding roller B11 to separate it from the feeding roller B10.

Release timing of the matching piece B121 described above, in other words, solenoid
The demagnetization timing of B14 is set by pulse counting by an encoder (not shown) that works in conjunction with a motor (not shown) that drives the baking cylinder P.

In such a structure, when the document S1 is inserted into the feeding section A1, the document S1 is fed to the leading edge aligning section B by the feeding roller A11 and the ball A12, and the feeding path of the leading edge aligning section B. The tip is hit by the matching piece B121 protruding inside. on the other hand,
The above-mentioned pulse counting is started by detection of the document S1, and at this time, in the feeding section A2 of the photosensitive paper S2, the paper feeding roller
A22 starts to rotate, and the photosensitive paper S2 in the cassette A21 is fed out and fed toward the leading edge alignment portion B. Then, when it is determined that the leading edge alignment of the document S1 and the photosensitive paper S2 is completed, an excitation command is issued to the solenoid B14. At this time, the solenoid B14 pulls the feeding operation lever B13 to the tension spring B1.
In the figure, the support arm B12 is rotated clockwise against the bias of 5 to swing the support arm B12 clockwise around the axis B16. Therefore, the alignment sheet B121 is rotated in a direction to be withdrawn from the feeding path to release the feeding path, and the document S1 is formed by the feeding roller B10 and the sub-feeding roller B11 swinging toward the roller B10.
Then, the photosensitive paper S2 is fed to the printing cylinder P. When the number of pulses reaches a predetermined value, an excitation cancellation command is issued to the solenoid B14, and the excitation of the solenoid B14 is canceled, so that the feeding of the document S1 and the photosensitive paper S2 is completed.

By the way, in the diazo copying machine equipped with the above-described feeding device, it is designed to obtain an arbitrary image density, which is judged from the light transmittance of the document S1. This is made possible by changing the printing exposure time, and by doing so, it is devised to obtain the image density corresponding to the change in the light transmittance of the document S1.

That is, since the exposure amount is determined by the illuminance of the illumination source and the exposure time, if the illuminance is constant, the exposure amount can be changed by changing the exposure time. Therefore, in the diazo copying machine, the same action as changing the exposure time is obtained by changing the conveying speed of the original S1 and the photosensitive paper S2.

Therefore, even if the transport speed of the original S1 and the photosensitive paper S2 in the printing / exposure unit at the current stage changes according to the light transmittance of the original S1, the leading ends of the original S1 and the photosensitive paper S2 are aligned. hand,
The polymerization state is prevented from changing due to the change in transport speed.

That is, when the conveying speed changes, the feeding path opening timing of the aligning piece B121 for aligning the leading ends is made different depending on the difference in the conveying speed. Specifically, in FIG. Pulse counting through the encoder is performed from the time when the sensor for detecting the leading edge of the document and the sensor for detecting the leading edge of the photosensitive paper, which are made of the photoelectric conversion member indicated by C2, are turned on
As shown in FIG. 4, when the excessive feed amount obtained according to the number of pulses is obtained, the matching piece B121 is returned to the initial position and the feeding path is opened. This ensures that the leading edges of the original S1 and photosensitive paper S2 are aligned.
It is said that it corresponds to B121, and when the feeding path of the matching piece B121 is opened, it is fed out in a superposed state in which the tips are aligned.

(Problems to be solved by the invention) However, in the case where such a treatment in feeding is adopted, the mechanism in the feeding unit at the time of performing this treatment is, for example, an opto-electric device as a detection member. When electric components such as a conversion member or a solenoid as a mechanical unit are used, the conversion time of these electric components and the response time, which means the time until mechanical operation, are delayed. Even if the feeding path is opened by the matching piece at the time when the set excess feed amount is obtained, the feed amount corresponding to the delay of the response time becomes a value that is not related to the excess feed amount. There was a problem that perfect tip alignment could not be performed.

Therefore, in view of the above-mentioned problems in the feeding device, the purpose of the present invention is to feed the original and the photosensitive paper in a state where the leading ends of the original and the photosensitive paper are perfectly aligned even when the conveyance speed in the printing exposure unit changes. It is to obtain a transport device that can send.

(Means for Solving the Problem) In order to achieve this object, the present invention provides a method of changing the feeding path opening timing of a matching piece in the feeding unit according to a change in the feeding speed in the printing exposure unit. It is proposed to change the feed amount corresponding to the response delay in the mechanical unit.

(Operation) According to the present invention, when there is a change in the transport speed in the printing exposure unit, for example, when the transport speed becomes faster than the current stage, the excess feed amount in the feeding unit increases. The delay time for the opening time is set to a small value in the matching piece in the feeding path in anticipation of, and in the opposite case, the matching piece in the feeding path is set in anticipation of the excessive feed amount becoming small. By setting a large delay time for the opening time, even if a feed amount corresponding to the delay of the response time occurs for each of these transport speeds, a feed amount corresponding to the excess feed amount corresponding to the transport speed is always obtained. Thus, a constant superposition of the original and the photosensitive paper is obtained.

(Embodiment) Hereinafter, details of an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

FIG. 1 is a block diagram showing a main part of a carrying device according to an embodiment of the present invention.

The feature of the present embodiment is that a control section is provided for varying the start timing of opening the feeding path of the alignment piece for aligning the originals and the photosensitive paper by colliding the leading ends of the original and the photosensitive paper in the feeding path according to the conveying speed of the original and the photosensitive paper. Especially.

That is, referring to FIG. 1, the control unit 20 in the present embodiment.
Is a microcomputer 21 that performs calculation and judgment processing.
(Hereinafter referred to as CPU) is the main part, and this CPU21
Is the I / 0 interface 22 and ROM as storage device
23 and RAM 24 are connected respectively.

At the input port of the I / 0 interface 22 described above, a mode switch (not shown) that determines the conveying speed for setting the image density, the document leading edge detection sensor C1 and the photosensitive paper detection sensor described in FIG. C2, an encoder that interlocks with the rotation of the baking cylinder, and other detection units (not shown) related to the copying process are connected to each other, and the output port includes a solenoid B14 and a solenoid B14 for swinging drive of the support arm 12 in FIG. Other mechanical units (not shown) necessary for executing the copying process are connected.

Further, the above-mentioned ROM 23 stores the excessive feed amount with respect to the conveying speed described in FIG. 4 and the feed amount corresponding to the response delay in the mechanical parts with respect to the excessive feed amount. Therefore, in the ROM 23, the relationship for opening the matching piece at the time when the feed amount obtained from the response delay is calculated with respect to the excess feed amount obtained from the transport speed and the feed amount is obtained is mapped. Will be there.

In this embodiment having such a structure, the operation shown in the flowchart of FIG. 2 is performed.

That is, FIG. 2A shows a part relating to the feeding of the original S1 and the photosensitive paper S2 in the main routine for executing the copying process of the diazo copying machine.

In the figure, when copying is started, the control unit 20 performs initialization processing (ST1), and executes document leading edge matching processing (RGCNT1) and photosensitive paper leading edge matching processing (RGCNT2).

In this document leading edge matching process (RGCNT1), as shown in FIG. 2B, first, after the document is inserted, whether or not the document leading edge matching mode is set is determined by the state of the flag (SENTGF) (ST).
11) If it is in that mode, it is judged whether the sensor C1 for detecting the leading edge of the document is in the detection position (ST12), and if it is in that position, the excess feed amount setting according to the transport speed mode is set. Execute the subroutine (SFEDCNT) (ST13).

In this subroutine, I / 0 interface 22
Based on the transport speed set by the mode switch connected to the input port, the speeds are discriminated as shown in FIG. 2 (D), and from the result, the excessive feed amount shown in FIG. The number of pulses on the encoder side that corresponds to is registered in the accumulator (Acc) (ST30 to ST3
6).

As described above, the number of pulses at this time is set to a value that allows for the amount of feed obtained in response to the response feed in the mechanical parts related to feeding. If it is set so that the delay time with respect to the opening time of the matching piece set by the number of pulses corresponding to the excessive feed amount obtained from the transport speed becomes small, that is, the broken line in FIG. As shown, as the transport speed (copy speed) becomes higher, the number of pulses is the same as when the excessive feed amount becomes smaller.By this, the state where it can be determined that the leading edge alignment ends early is set, On the contrary, when the transport speed becomes slower than the current stage, a value that increases the delay time with respect to the opening time of the matching piece set by the number of pulses described above, that is, As shown by a broken line shown in Figure 4, is the number of pulses increases the excessive feeding amount, sets the state in which it can be determined that the front end alignment is completed late. Therefore, by setting the opening time of the matching piece as described above, even if the feed amount corresponding to the response delay occurs, the feeding amount becomes the same state as that canceled by the adjustment of the opening time of the matching piece, and the conveyance speed is The corresponding excess feed amount is maintained as it is.

On the other hand, as described above, when the excess feed amount is set, the excess feed amount set in FIG. 2 (B) is checked (ST14). That is, in this step, the encoder counts the number of pulses corresponding to the above-mentioned excessive feed amount from the time when the document leading edge detection sensor C1 is turned on.

When the number of pulses corresponding to the excessive feed amount matches the number of pulses obtained from the transport speed in the step indicated by reference numeral ST14, the excessive feed amount control flag (RGJOBF2) is set to "1", so-called (ST15), which will be described later. Determine the status of the excess feed amount control flag (RGJOBF3) on the photosensitive paper S2 side (S
T16), if the flag is set, the solenoid (see FIG. 3) is energized and the support arm B12 is rotated clockwise in FIG. 3 in order to retract the alignment piece B121 from the feeding path ( ST17).

Further, in step ST16 described above, if the excessive feed amount control flag (RGJOBF3) on the photosensitive paper S2 side is not set, that is, if it is not "1", the document feeding path shown in FIG. The clutch (not shown) for the feeding roller is set to the disengaged state to stop the document conveyance (ST18). Further, the energization of the solenoid completes the processing of this routine, so the original leading edge matching mode flag is set to "0" to prepare for the next original feeding.

In step ST2 described above, when the document leading edge detection sensor C1 is not in the detection position, the value of the counter that counts pulses in the encoder is returned to "0" (ST1
9).

On the other hand, the photosensitive paper leading edge matching process (RGCNT) is shown in Fig. 6 (C).
As shown, the process is executed by the same algorithm as the leading edge matching process (RGCNT1) of the photosensitive paper S2 (ST20 to ST3).
0). In this embodiment, since it is required by an experiment that the feed amount of the photosensitive paper S2 in the leading edge matching process on the photosensitive paper S2 side may be smaller than that of the original S1 by 2 pulses, for example, A process of subtracting 2 pulses from the number of pulses corresponding to the excessive feed amount obtained from the transport speed is performed (ST23).

Further, after the overfeed control flag (RGJOB3) is set to "1" at the time when the counting of the pulses corresponding to the above-mentioned corrected overfeed is finished, the original paper side is the same as the original S1 side. The state of the flag (RGJOB2) which means that the counting of the number of pulses corresponding to the excessive feed amount in the above is finished, and when the flag is set, the state of the sensor C2 for detecting the leading edge of the photosensitive paper is indicated. The flag (SENTCF) is reset, and the excess feed amount control flag (RGJOB2) on the original S1 side is reset.

(Effects of the Invention) As described above, according to the present invention, even if the feed amount occurs due to the response delay until the feeding position is obtained in the document and photosensitive paper feeding mechanism, regardless of the change in the conveyance speed, Since the overfeed amount calculated from the transport speed can be maintained at a value corresponding to the transport speed, even if there is a difference in the transport speed, the document and the leading edge of the photosensitive paper S2 can be reliably aligned by the overfeed amount. become.

[Brief description of drawings]

FIG. 1 is a block diagram showing an essential part of a carrying device according to an embodiment of the present invention, FIG. 2 is a flow chart showing the operation of the essential part shown in FIG. 1, and FIG. 3 is a side view showing an example of the carrying device. FIG. 4 is a diagram showing the relationship between the transport speed and the excess feed amount in the feeding section of the transport apparatus shown in FIG. 20 ... Control unit, 21 ... Microcomputer, A ... Feeding unit,
B ... Tip aligning section, B11 ... Sub paper feed roller, B12 ... Support arm, B13 ... Feeding operation lever, B14 ... Solenoid, B1
21 ... Alignment piece, C1 ... Original document leading edge detection sensor, C2 ... Photosensitive paper leading edge detection sensor.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masashi Shimada 1-3-6 Nakamagome, Ota-ku, Tokyo Stock company Ricoh Co., Ltd. (72) Hiroshi Onda 1-3-6 Nakamagome, Ota-ku, Tokyo Stocks Ricoh Company (72) Inventor Yuichi Fujii 1-3-6 Nakamagome, Ota-ku, Tokyo Stock Company Ricoh Co., Ltd. (56) References Real public Sho 49-16742 (JP, Y1) Real public Sho 60-30749 (JP , Y2)

Claims (1)

[Scope of utility model registration request] 1. A device for transporting a plurality of sheets of paper in a superposed state, which is arranged at a position in a feeding path where the leading ends of the plurality of sheets of paper can overlap with each other, and can move back and forth in the feeding path. An aligning member and, when the aligning member is retracted from the feed path when the aligning member is advanced into the feed path, the feed path is retracted when the aligning member is retracting from the feed path. A feeding member that advances into the inside, a detection unit that is located on the upstream side in the moving direction of the paper with respect to the alignment member, and that detects the leading edge of the paper, a signal from the detection unit, and a conveyance speed of the paper, respectively. The matching member is moved to the feeding path in response to a signal input from the detecting means, and the matching member is moved to the matching member at the time when the excessive feeding amount set corresponding to the conveying speed is obtained. And a control unit for retracting from the feeding path, In consideration of a change in the excessive feed amount due to a change in the transport speed, the aligning member is configured to cancel the feed amount of the paper obtained by the response delay in the aligning member, the feeding member and the detecting means. A conveyance device, wherein a delay time with respect to a timing of withdrawal from a feeding path is changed.