JP2005335940A - Sheet-like member carrying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet-like member carrying device of an inexpensive constitution capable of correcting a skew so as to accurately become straight to a reading part. <P>SOLUTION: This sheet-like member carrying device has regist rollers 24 and 25 for correcting the skew of a document, a driving motor 35 for driving the regist rollers 24 and 25, an electromagnetic clutch 37 interposed between the regist roller 24 and the driving motor 35, two regist sensors 4L and 4R juxtaposed in the horizontal direction orthogonal to the document carrying direction on the just upstream side in the document carrying direction of the regist rollers 24 and 25 and detecting the passing of the document, and a controller 5 for outputting a driving signal for driving the regist rollers 24 and 25 by connecting the electromagnetic clutch 37 after passing a carrying time T required for carrying the document between the two regist sensors 4L and 4R and the regist rollers 24 and 25 when detecting the passing of the tip of the document by both two regist sensors 4L and 4R. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a sheet-like member conveyance device including a registration unit that corrects skew of a sheet-like member such as a document and a registration sensor that detects passage of the sheet-like member.

  2. Description of the Related Art Conventionally, in an automatic document feeder (ADF) mounted on a copying machine or a facsimile machine, when reading a document, the skew of the document is corrected and fed to the reading unit, and the reading unit is then fed to the reading unit. A technique for reading an original in a straight state is known.

  Specifically, the ADF includes a registration roller that corrects the skew of the document along the document conveyance path toward the reading unit, a conveyance roller that is disposed on the upstream side of the registration roller, and an upstream side of the registration roller. And a single registration sensor disposed on the side, and an electromagnetic clutch is interposed between the drive motor and the registration roller. After the elapse of time, the electromagnetic clutch is connected, and the driving of the registration roller that has been stopped is started.

  During this predetermined time, the leading edge of the document reaches the nip portion of the registration roller, and the skew of the document is corrected by abutting the leading edge of the document against the nip portion of the registration roller. Yes. Then, after a predetermined time has elapsed, the driving of the registration roller is started, and the document whose skew has been corrected by the registration roller is conveyed toward the reading unit.

  However, when the document is skewed, as shown in FIG. 7, there are a case where the document is skewed to the right and a case where the document is skewed to the left. In both cases, the registration sensor 4S is used uniformly. If the registration rollers 24 and 25 are driven after a predetermined time has elapsed since the leading edge of the document 8 was detected, the skew of the document 8 may not be corrected.

  This will be described below. FIG. 7A is a diagram showing a state in which the leading edge of the document 8 skewed left is detected by the registration sensor 4S, and FIG. 7B is a document 8 skewed left. FIG. 7C shows a state of the document 8 after a certain time has elapsed from when the leading edge of the document is detected by the registration sensor 4S. FIG. 7C shows the leading edge of the document 8 skewed to the right by the registration sensor 4S. FIG. 7D is a diagram showing a state of detection. FIG. 7D shows the state of the original 8 after a certain period of time has elapsed since the leading edge of the original 8 skewed to the right is detected by the registration sensor 4S. 7A and 7C, after the same fixed time has elapsed from when the leading edge of the document is detected, the leading edge of the document 8 that is skewed to the right has already been registered with the registration rollers 24. 25 nip (see FIG. 7 (d)), but skewed to the left Tip of the manuscript 8 has not yet reached the nip portion of the registration rollers 24, 25 (see FIG. 7 (c)).

  If a predetermined time has elapsed after the leading edge of the document 8 is detected by the registration sensor 4S, the registration rollers 24 and 25 start to be driven. Although the line is corrected, the document 8 skewed to the left may not be corrected.

  The predetermined time can be set longer to match the document 8 skewed to the left, but the predetermined time set long is too long for the document 8 skewed to the right, and the waiting time is long. become longer. Further, at this time, with the entire width direction of the front end of the document 8 skewed to the right being abutted against the nip portion of the registration rollers 24 and 25, the document 8 is longer than necessary for the registration rollers 24 and 25. When the paper is fed to the top, the leading edge of the document 8 may be bent and bent, which is also undesirable.

  Therefore, in the technique disclosed in Patent Document 1, as shown in FIG. 3 of the same document, two left and right resist sensors are juxtaposed in the lateral direction perpendicular to the document conveying direction, and each resist sensor is associated with each resist sensor. Two sets of left and right registration rollers are arranged on the side opposite to the reading portion of the registration sensor. One of the left and right registration rollers is driven by a first drive motor, and the other right and left registration rollers are driven by a second drive motor. The inclination of the original is calculated based on the difference in detection timing of the leading edge of the original detected by the two registration sensors, and at least one of the first drive motor and the second drive motor is driven based on the calculated inclination of the original. The skew of the manuscript is corrected by controlling the acceleration and deceleration of the motor.

The configuration for correcting the skew of the document according to Patent Document 1 is completely different from the configuration according to the prior art, and in Patent Document 1, the rotation of the right and left registration rollers is stopped based on the calculated document inclination. On the other hand, the rotational speed of at least one registration roller is raised and lowered to control the rotational speed of the left and right registration rollers, and the skew of the original is corrected by the difference between the rotational speeds of the left and right registration rollers. In the technology, the document is fed forward for a predetermined time after the leading edge of the document is detected by the registration sensor, and the skew of the document is corrected by abutting the leading edge of the document against the nip portion of the registration roller.
JP-A-7-223756

  In order to correct the original so that the original is exactly straight with respect to the reading unit, in Patent Document 1, based on the calculated inclination of the original, one registration roller is decelerated to what speed over what time. Then, it is calculated how long it takes to return from the decelerated rotation speed to the original rotation speed, and the control is complicated.

  Patent Document 1 describes that it is theoretical to switch the rotation speed control of one registration roller from deceleration to acceleration when the calculated half-angle of the original document is reached. Is corrected by taking into account factors such as the friction coefficient of the outer peripheral surface of the registration roller, the friction coefficient of the document due to the difference in paper quality, and slipping between the registration roller and the document when the registration roller is switched from deceleration to acceleration. It is difficult to get the original straight, and it is difficult to make the original straight with respect to the reading unit.

  Further, in this configuration, in addition to the main drive motor that drives each roller in the ADF, a first drive motor that drives the left and right registration rollers and a second drive motor that drives the left and right registration rollers are attached. As a result, the number of parts is large, and it is not very advantageous in terms of cost.

  Accordingly, in the present invention, in view of the above-described points, a document that is completely different from that of Patent Document 1 is skewed so that a document that is skewed to the left or right is accurately straight with respect to the reading unit. It is an object of the present invention to provide a sheet-shaped member conveyance device such as an ADF having an inexpensive configuration that can correct a line.

The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.
First, as described in claim 1, a conveyance unit that conveys a sheet-like member, a registration unit that corrects skew of the sheet-like member, and a single drive source that drives the conveyance unit and the registration unit And a power connection / disconnection means interposed between the registration means and the drive source, wherein the sheet-like member is disposed upstream of the registration means in the conveyance direction of the sheet-like member. When the passage of the front end of the sheet-like member is detected by both of the two registration sensors arranged side by side in the transverse direction perpendicular to the conveying direction of the sheet and detecting the passage of the sheet-like member, A control means for outputting a power connection signal to the power connection / disconnection means after a conveyance time required for conveying the leading end of the sheet-like member between two registration sensors and the registration means has elapsed; A configuration with.

  According to a second aspect of the present invention, the two registration sensors include one optical sensor having a light projecting portion and a light receiving portion, and one end portion of the two resist sensors being pressed against the tip of the sheet-like member. The two feelers rotate in the transport direction, and one end of the two feelers is juxtaposed in the lateral direction perpendicular to the transport direction of the sheet-like member on the transport path, and the other end is the optical sensor. The two feelers are juxtaposed between the light projecting portion and the light receiving portion, and one end portions of the two feelers are both pushed by the tip of the sheet-like member, and both the two feelers rotate, and the other ends of the two feelers. Both the parts are retracted from between the light projecting part and the light receiving part of the optical sensor, so that the optical sensor is turned on to detect passage of the sheet-like member.

  According to a third aspect of the present invention, the two registration sensors are arranged symmetrically in the lateral direction perpendicular to the sheet-like member conveyance direction.

Since the present invention is configured as described above, the following effects can be obtained.
First, in the first aspect of the invention, when the passage of the front end of the sheet-like member is detected by both of the two registration sensors arranged side by side in the lateral direction orthogonal to the conveying direction of the sheet-like member, After the conveyance time required for conveying the leading edge of the sheet-like member between the registration sensor and the registration means has elapsed, the driving of the registration means is started. Whatever angle is inclined in the direction, the sheet-like member is conveyed until the leading end of the sheet-like member is abutted against the nip portion of the registration means. In other words, the measurement of the conveyance time is started with reference to the registration sensor with the slower detection of the passage of the tip of the sheet-like member of the two registration sensors, and the sheet-like member is skewed at any angle. However, when the conveyance time has elapsed, one end in the width direction of the front end of the sheet-like member detected by the slower registration sensor is also lightly abutted against the nip portion of the registration means. Thus, the skew of the original is surely corrected. Thus, after the skew of the original is reliably corrected, the driving of the registration means is started, and the document can be accurately and straightly conveyed to the reading unit, thereby improving the reliability.
Furthermore, this sheet-like member conveyance device has a small number of parts, a simple control configuration, and is advantageous in terms of cost.

  Further, in the invention described in claim 2, the same effect as that of the invention described in claim 1 can be obtained, and the two resist sensors are each constituted by one optical sensor and one feeler, for a total of two optical sensors. And two feelers are used. As described in claim 2, two resist sensors are composed of one optical sensor and two feelers, so that one optical sensor can be reduced. An optical sensor is a moderately expensive part, which is very advantageous in terms of cost.

  And in invention of Claim 3, while there exists an effect similar to the invention of Claim 2, while arrange | positioning two registration sensors symmetrically in the horizontal direction orthogonal to the conveyance direction of a sheet-like member, The right-side feeler and the left-side feeler are configured to rotate at the same angle with the same moment, so that the right and left balance is improved.

Next, an embodiment of the present invention will be described with reference to the drawings.
A sheet-like member conveying apparatus according to the present invention is an apparatus that conveys a document, bill, check, banknote or other sheet-like member. First, referring to FIG. An automatic document feeder (hereinafter referred to as ADF) 1 mounted on a facsimile machine will be outlined.

  As shown in FIG. 1, a first document transport path 11 that is a main transport path and a second document transport path 12 that reverses the front and back surfaces of a document are formed in the ADF 1. 11 is formed in a substantially “C” shape when viewed from the side from the paper feed port 13 to the paper discharge port 14, and the second document transport path 12 is formed between the upstream side and the downstream side of the reading unit 3 in the first document transport path 11. It is branched and formed from the downstream branch portion 15 toward the upstream junction 16. A merging portion 16 where the second document conveyance path 12 merges with the first document conveyance path 11 is provided at a curved portion of the first document conveyance path 11, and is downstream of the merging portion 16 along the first document conveyance path 11. Resist sensors 4L and 4R, which will be described later, are arranged on the side.

  The arrangement position of the rollers for conveying the document will be described. A pickup roller 21 is disposed in the vicinity of the paper feed port 13 to the ADF 1 along the first document conveyance path 11, and a separation roller 22 is disposed downstream of the pickup roller 21. And the retard roller 23 are arranged, and the registration rollers 24 and 25 are arranged on the downstream side of the registration sensors 4L and 4R, and the first feed rollers 26 and 27 are interposed between the registration rollers 24 and 25 and the reading unit 3. The second feed rollers 28 and 29 are disposed between the reading unit 3 and the branching unit 15, and the discharge rollers 30 and 31 that can rotate forward and backward between the branching unit 15 and the sheet discharge outlet 13. Is arranged.

  Arms 20 and 20 are swingably attached to the separation roller 22 from both ends in the axial direction toward the paper feed port 11, and picked up at the end of the arms 20 and 20 on the paper feed port 11 side. A roller 21 is pivotally supported. The separation roller 22 starts to rotate in the document take-in direction, and the pickup roller 21 is lowered through the gear mechanism by the rotation of the rotation shaft of the separate roller 22 in the document take-in direction. , The rotation of the rotating shaft of the separation roller 22 is transmitted to the pickup roller 21 via the clutch mechanism, and the pickup roller 21 starts to rotate in the document take-in direction. Thus, the original is fed one by one between the separation roller 22 and the retard roller 23.

  The function of each of the rollers is roughly classified into four systems. The rollers 21, 22, and 23 separate the documents stacked on the document feed tray 18 one by one, and feed the first document transport path 11 from the feed port 13. The rollers 24 and 25 perform registration operations and correct the skew of the original, and the rollers 26, 27, 28, and 29 read the original to the reading unit 3. Rollers 30 and 31 are discharge means for discharging the read original from the discharge port 14.

  These rollers 21 to 31 are configured to be driven by a single drive motor 35. Among the rollers, rollers 21, 22, 24, 26, 28, and 30 are drive rollers, and rollers 23, 25, 27, 29, and 30. Reference numeral 31 denotes a driven roller. An electromagnetic clutch 36 is interposed between the driving motor 35 as a driving source and the separation roller 22, and an electromagnetic clutch 37 is interposed between the driving motor 35 and the registration roller 24, and the driving is performed. A forward / reverse rotation switching mechanism 38 that switches the rotation direction of the roller is interposed between the motor 35 and the discharge roller 30.

As shown in FIG. 2, the drive motor 35, the electromagnetic clutches 36 and 37 as power connection / disconnection means, and the forward / reverse rotation switching mechanism 38 are connected in communication with a controller 5 as control means. 5 is configured to operate in response to a control signal from 5.
The drive motor 35 uses a step motor or the like in which pulses are sequentially applied to the multiphase windings of the stator and the rotor rotates by a certain angle for each pulse. The document transport distance is measured by counting the number of rotation steps of the drive motor 35.

  As shown in FIG. 1, a switching member 34 that switches the document conveyance direction is provided at the branch portion 15 of the first document conveyance path 11 and the second document conveyance path 12. The switching member 34 is composed of a flexible member such as a film, and normally closes the first document transport path 11 by its elasticity or its own weight. From the reading unit 3 in which the document is composed of transmissive glass. When transported toward the branching section 15, the switching member 34 is pushed up to the leading edge of the document to open the first document transport path 11, the document is transported toward the paper discharge port 14, and the document is discharged into the paper discharge port 14. The document is guided to the second document conveyance path 12 by the switching member 34 that blocks the first document conveyance path 11 when being conveyed from the first to the branching section 15.

  As shown in FIG. 3, the document 8 conveyed toward the reading unit 3 may be skewed to the right or left, and in the present invention, the downstream side of the merging unit 16 of the first document conveyance path 11. In FIG. 2, two registration sensors 4L and 4R are juxtaposed in the lateral direction orthogonal to the document conveying direction. The positions of the two registration sensors 4L and 4R in the document conveyance direction are the registration rollers 24 and 25 as registration means for correcting the skew of the document, and upstream of the registration rollers 24 and 25 in the document conveyance direction. It only needs to be arranged between the separating roller 22 and the retard roller 23 which are the conveying means of the arranged original. In the present invention, the merging section 16 where the second original conveying path 12 merges with the first original conveying path 11. In the double-sided scanning, both the original before reading on the first side and the original before reading on the second side are detected.

  As shown in FIG. 2, the registration sensors 4L and 4R that detect the passage of the document are connected to a controller 5 that is a control unit. The controller 5 detects the passage of the leading edge of the document by the registration sensors 4L and 4R. Based on the detection, the skew of the original is corrected and its conveyance is controlled as follows.

  Next, a flow until the skew feeding of the document conveyed toward the reading unit 3 is corrected will be described with reference to FIG.

  As shown in FIG. 4, the passage of the leading edge of the document conveyed toward the reading unit 3 is first detected by one of the two registration sensors 4L and 4R by one registration sensor 4L (or 4R) (step S1). When the other registration sensor 4R (or 4L) detects it (step S2), that is, when the passage of the leading edge of the document is detected by both of the two registration sensors 4L and 4R, the controller The conveyance time T required for conveying the leading edge of the document between the registration sensors 4L and 4R and the registration rollers 24 and 25 is measured, and after the conveyance time T has elapsed (step S3), the power connection / disconnection means A power connection signal is output to the electromagnetic clutch 37, and the electromagnetic clutch 37 that has been in a disconnected state is connected to start driving of the registration rollers 24 and 25. Step S4).

  Since the transport time T from the registration sensors 4L and 4R to the registration rollers 24 and 25 is determined by the mechanism structure, the length is determined by the number of rotation steps of the drive motor 35, that is, the transport time. T is measured by step control of the drive motor 35, and the number of rotation steps of the drive motor 35 required for the leading edge of the document to be conveyed from the registration sensor 4L / 4R position to the registration roller 24/25 position is measured. After that, a power connection signal is output from the controller 5 to the electromagnetic clutch 37.

  In the above configuration, no matter what angle the document is skewed in the left or right direction, the passage of the leading edge of the document is detected by both of the two registration sensors 4L and 4R. The conveyance time T is measured, and the document is conveyed until the leading edge of the document is abutted against the nip portion of the registration rollers 24 and 25.

  In other words, the measurement of the conveyance time T is started on the basis of the registration sensor 4L (or 4R) of the two registration sensors 4L and 4R that detects the passage of the leading edge of the document later, and how the document is processed. Even if the document is skewed at an arbitrary angle, when the conveyance time T has elapsed, one end in the width direction of the leading edge of the document detected by the later registration sensor 4L (or 4R) is conveyed without excess or deficiency. Lightly abutted against the nip portions of the rollers 24 and 25, the skew of the original is reliably corrected by mechanical means.

After the skew of the original is reliably corrected in this way, the driving of the registration rollers 24 and 25 is started, and the registration rollers 24 and 25 can be accurately and straightly conveyed to the reading unit 3, thereby improving the reliability. .
Furthermore, this configuration has a small number of parts, a simple control configuration, and is advantageous in terms of cost.

  Supplementally, the document feed tray 18 is provided with document guides 19 and 19 for aligning both sides of the document, and the document guides 19 and 19 are configured not to skew the document. Therefore, when a document whose both sides are aligned by the document guides 19 and 19 is conveyed toward the reading unit 3 on the document feeding tray 18, there is little possibility that the document is skewed at the registration sensor 4L and 4R positions. However, when both sides of the original are read, there is a possibility that the original after reading the first side may be skewed when switchback inversion is performed at the paper discharge port 14. The original after reading the first surface enters the first original conveyance path 11 from the merging portion 16 via the second original conveyance path 12, and reaches the registration sensor positions 4L and 4R. In this case, regardless of the angle of the original in the left or right direction, the original can be directed straightly with a simple configuration.

  When documents of different sizes such as A4 size and B4 size are mixed and set on the document feed tray 18, the document having the largest width (the length in the lateral direction perpendicular to the document transport direction) Is less likely to be taken into the first document transport path 11 while being guided by the document guides 19 and 19, but is not guided by the document guides 19 and 19 for documents of other sizes, the first document transport path. In this case, in the present invention, even if the original is skewed in any direction, it can be accurately performed with a simple configuration. The manuscript can be turned straight.

Next, the configuration of the registration sensors 4L and 4R will be described.
The registration sensors 4L and 4R are composed of, for example, an optical sensor and a feeler. Hereinafter, four examples of this configuration will be described.

First, the first embodiment of the configuration of the registration sensors 41L and 41R will be described.
FIG. 5 is a diagram illustrating the configuration of the registration sensors 41L and 41R according to the first embodiment. Each registration sensor 41L (41R) includes an optical sensor 44L (44R) having a light projecting unit 44a and a light receiving unit 44b, and The other end 45b of the feeler 45L (45R) is thrown by the optical sensor 44L (44R). The one end 45a of the feeler 45L and the one end 45a of the feeler 45R are juxtaposed in the lateral direction perpendicular to the document conveying direction.

  The controller 5 is configured to receive document detection signals from the registration sensors 41L and 41R, and the one end 45a of the feeler 45L (45R) of the registration sensor 41L (41R) is pushed against the leading edge of the document, thereby causing the feeler 45L (45R). ) Rotates, and the other end 45b of the feeler 45L (45R) is retracted from between the light projecting portion 44a and the light receiving portion 44b of the optical sensor 44L (44R), so that the optical sensor 44L (44R) is turned on. Thus, the passage of the original is detected.

  In FIG. 5, the length of the arm portion 45c that connects the one end 45a and the other end 45b of the left feeler 45L and the arm portion that connects the one end 45a and the other end 45b of the right feeler 45R. The two registration sensors 41L and 41R are arranged symmetrically in the lateral direction perpendicular to the document transport direction, but the left side of the arm portion 45c of the feeler 45L is configured with the same length. The length and the length of the arm portion 45c of the right feeler 45R are configured to be different lengths due to the arrangement space and the like, and the two registration sensors 41L and 41R are asymmetric in the lateral direction perpendicular to the document conveying direction. You may arrange in.

Next, a second embodiment of the configuration of the registration sensors 42L and 42R will be described.
FIG. 6 is a diagram showing the configuration of the registration sensors 42L and 42R according to the second embodiment. In the second embodiment, the optical sensors 46 of the left and right feelers 47L and 47R are shared. That is, the registration sensors 42L and 42R according to the second embodiment include one optical sensor 46 having a light projecting unit 46a and a light receiving unit 46b, and two feelers 47L and 47R, and one end 47a of the feeler 47L. And the one end 47a of the feeler 47R are juxtaposed in the lateral direction perpendicular to the document conveying direction, and the other end 47b of the feeler 47L and the other end 47b of the feeler 47R are the light projecting portion 46a and the light receiving portion of the optical sensor 46. 46b.

  With the configuration as described above, normally, the other end 47b of the feeler 47L and the other end 47b of the feeler 47R are both disposed between the light projecting portion 46a and the light receiving portion 46b of the optical sensor 46. Light from the portion 46a toward the light receiving portion 46b is blocked, and the optical sensor 46 is turned off. Then, one end 47a of the feeler 47L is pushed at the front end of the original by the original conveyed toward the reading unit 3 and also one end 47a of the feeler 47R, and both the two feelers 47L and 47R are rotated. The other end 47b of the feeler 47L and the other end 47b of the feeler 47R are both retracted from between the light projecting portion 46a and the light receiving portion 46b of the optical sensor 46, so that the light receiving portion 46b has a light projecting portion. The light from 46a is detected, whereby the optical sensor 46 is turned on to detect the passage of the document.

  With the configuration as described above, in the second embodiment, the two registration sensors 42L and 42R are configured by one optical sensor 46 and two feelers 47L and 47R, so that the optical sensor can be compared with the first embodiment. This optical sensor is a moderately expensive component, which is advantageous in terms of cost.

  In FIG. 6, the length of the arm portion 47c that connects the one end portion 47a and the other end portion 47b of the left feeler 47L and the arm portion that connects the one end portion 47a and the other end portion 47b of the right feeler 47R. The two registration sensors 42L and 42R are arranged symmetrically in the lateral direction perpendicular to the document conveying direction, but the length of the arm 47c of the left-side feeler 47L is configured. The length and the length of the arm portion 47c of the right feeler 47R are configured to be different lengths due to the arrangement space and the like, and the two registration sensors 42L and 42R are asymmetric in the lateral direction perpendicular to the document conveying direction. You may arrange in.

FIG. 3 is a side cross-sectional view illustrating a schematic configuration of the ADF 1. The block diagram which shows the control structure of ADF1. The figure which shows the positional relationship of the original 8 which skews right and left, and the registration sensor 4L * 4R which concerns on this invention. 6 is a flowchart for explaining a flow until a skew of a document is corrected. The front view which shows the structure of the registration sensor 41L * 41R which concerns on 1st Example. The front view which shows the structure of the registration sensors 42L and 42R which concern on 2nd Example. The figure which shows the positional relationship of the original 8 which skews right and left, and the conventional registration sensor 4S.

Explanation of symbols

1 ADF
3 Reading unit 4L Registration sensor 4R Registration sensor 5 Controller 8 Document 11 First document conveyance path 12 Second document conveyance path 16 Junction unit 21 Pickup roller 22 Separating roller 23 Retard roller 24 Registration roller 25 Registration roller 35 Drive motor 36 Electromagnetic clutch 37 Electromagnetic clutch 41L Registration sensor 41R Registration sensor 42L Registration sensor 42R Registration sensor

Claims (3)

Conveying means for conveying the sheet-like member;
Resist means for correcting skew of the sheet-like member;
A single drive source for driving the transport means and the resist means;
Power connection / disconnection means interposed between the registration means and the drive source;
In the sheet-like member conveying apparatus comprising:
Two resist sensors for detecting the passage of the sheet-like member, arranged side by side in the transverse direction orthogonal to the conveyance direction of the sheet-like member, on the upstream side in the conveyance direction of the sheet-like member of the resist means;
When the passage of the leading edge of the sheet-like member is detected in both of the two registration sensors, the conveyance time required for conveying the leading edge of the sheet-like member between the two registration sensors and the registration means has elapsed. And a control means for outputting a power connection signal to the power connection / disconnection means,
A sheet-like member conveying apparatus comprising: The two resist sensors are:
One optical sensor having a light projecting part and a light receiving part, and two feelers that rotate in the conveying direction of the sheet-like member when one end thereof is pushed by the tip of the sheet-like member,
One end of the two feelers is juxtaposed in the transverse direction perpendicular to the carrying direction of the sheet-like member in the carrying path, and the other end is juxtaposed between the light projecting part and the light receiving part of the optical sensor,
Both ends of the two feelers are pushed by the tip of the sheet-like member, both of the two feelers rotate, and the other ends of the two feelers both receive light from the light projecting portion of the optical sensor. The sheet-like member transport device according to claim 1, wherein the optical sensor is turned on to detect passage of the sheet-like member by retreating from the portion.   3. The sheet-like member conveyance device according to claim 1, wherein the two registration sensors are arranged symmetrically in a lateral direction orthogonal to a conveyance direction of the sheet-like member.

Images