JPH0812099A - Document placing mechanism of document conveying device - Google Patents

Abstract

PURPOSE:To certainly and smoothly feed stacked document sheets which include document a sheet with an affixed piece. CONSTITUTION:A document placing mechanism is equipped with a placing table 26 on which document sheets 16 are stacked, an elevation means to elevate and sink the table 26, and a holding means 30 to hold at a certain level the takeout part of the document sheet 16 positioned in the uppermost upon the table 26. The holding means 30 is equipped with a sensor 58 to sense the takeout part pressing 16c of the uppermost document sheet 11b, pressing members 60a-60d to be engaged by the document sheets 16 stacked on the table 26, and motors 62a-62d which change the levels of these members 60a-60d in conformity to the signals given by the sensor 58.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document placing mechanism in a document feeding device for accommodating a plurality of read documents including a pasted document in a stacked manner.

[0002]

2. Description of the Related Art For example, in an image reading apparatus, read originals stacked on an original placing portion are taken out one by one through an original feeding mechanism and conveyed and positioned by the image reading portion. The image information carried on the read document is read and then discharged to the document discharge section.

This type of document conveying mechanism is generally provided with rollers that are driven to rotate, and the uppermost read document is placed at a predetermined height position under the raising and lowering action of the mounting table.
The roller is slidably in contact with the uppermost read document to rotate, and the read document is fed out.

[0004]

By the way, for example, in a plate making machine for making a printing plate, a read manuscript (hereinafter referred to as a pasted manuscript) in which cutouts and photographs of characters, pictures and the like are pasted on a mount such as paper. Is often used. Therefore, as shown in FIG. 9, when a plurality of pasted originals 4 are stacked on the mounting table 2, each pasted original 4 is provided with a cutting member 6 such as a cutout such as a character or a picture or a photograph. By being provided, the take-out portion 4a of the pasted original 4 easily drops downward. The amount of sagging increases toward the uppermost pasted original 4, and the height position of the take-out portion 4a of each pasted original 4 varies depending on the number of laminated pasted originals 4. Therefore, it has been pointed out that it becomes difficult to reliably send out the pasted original 4 via the take-out roller 8.

The present invention is intended to solve this type of problem, and is to place a plurality of read originals, including a pasted original, on which a plurality of read originals are stacked in an original conveying apparatus capable of reliably and smoothly delivering the originals. The purpose is to provide a mounting mechanism.

[0006]

In order to achieve the above-mentioned object, the present invention conveys the read originals including the pasted originals one by one to the reading section through the take-out means and positions them, and the reading is performed. A document placing mechanism for accommodating a plurality of read documents before reading in a document conveying device for accumulating the read documents in a discharge section after the reading process is performed by the document reading unit. A mounting table on which the originals are stacked, an elevating means for elevating and lowering the mounting table, and a height of a take-out portion that engages with the taking-out means of the read original document arranged at the top of the placing table at a constant position. And holding means for holding.

[0007]

In the document placing mechanism of the document conveying apparatus according to the present invention, the height position of the placing table is adjusted under the action of the elevating means according to the number of stacked read originals on the placing table, and The height position of the taken-out portion of the read document placed on the top of the table is adjusted via the holding means. Therefore, even when a plurality of pasted originals are stacked as the read originals, the height of the taken-out portion of the uppermost pasted original can be constantly maintained at a constant position. It becomes possible to take out surely and smoothly.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A document placing mechanism according to the present invention will be described in detail below with reference to the accompanying drawings, with reference to an example in relation to a document conveying device incorporating the same.

1 and 2, reference numeral 10
Indicates a plate making machine. In the plate making machine 10, an image reading device and an image recording device are integrally formed, and a document feeder 14 according to the present embodiment is provided on a base 12 that constitutes the plate making machine 10. It is detachably attached.

The document feeder 14 is provided with a plurality of read documents 1
The document placing mechanism 18 according to the first embodiment for accommodating 6 in a stacked manner, the separating and conveying mechanism 20 for taking out the read originals 16 stacked on the document placing mechanism 18 one by one, and the taken out An image capturing unit 22 for holding the read document 16 at a shooting position and recording image information carried on the read document 16 on a plate material to perform plate making, and a document for reversing and stacking the read document 16 after shooting. And a discharge unit 24. As shown in FIG. 4, the read original 16 includes a pasted original having cutouts such as characters and pictures and a pasted portion 16b such as a photograph at a predetermined position on a mount 16a such as paper.

As shown in FIGS. 3 and 4, the document placing mechanism 18 according to the first embodiment has a placing table 26 on which a plurality of read originals 16 are stacked, and to raise and lower the placing table 26. Elevating means 28, and holding means 30 for holding a height of a take-out portion 16c that engages with a take-out means (described later) for the read document 16 arranged at the top of the placing table 26 at a constant position. Equipped with.

The mounting table 26 is provided with bracket portions 32a and 32b at both ends in the direction of arrow B, which intersects the conveying direction (direction of arrow A) of the read document 16, and the bracket portion 3 is provided.
Guide rods 3 that constitute the elevating means 28 on 2a and 32b
4a to 34d are vertically oriented and inserted. The casing member 36 is provided close to the bracket portions 32a and 32b.
a and 36b are fixed, and the casing member 36
A pulse motor 38, which constitutes the elevating means 28, is housed in a. A gear train 40 connected to the drive shaft of the pulse motor 38 is provided with a rotary shaft 42, and pulleys 44a and 44b having small diameters are mounted on the rotary shaft 42.

The pulleys 44a, 44b have large diameter pulleys 48a, 48 via timing belts 46a, 46b.
The connecting rods 50a and 50b, to which b is engaged and the pulleys 48a and 48b are fixed at one end, extend below the mounting table 26 in the direction of arrow B. Connecting rods 50a, 50b
Are rotatably supported on the vertical planes of the casing members 36a and 36b, and the lower pulleys 52a to 52d are located inside the casing members 36a and 36b at both ends of the connecting rods 50a and 50b. Is fixed.

Inside the casing members 36a and 36b, upper pulleys 54a to 54d are rotatably supported above the lower pulleys 52a to 52d. The lower pulleys 52a to 52d and the upper pulleys 54a to 54d are engaged with the ascending / descending timing belts 56a to 56d, and the bracket portion 32 is partially attached to the ascending / descending timing belts 56a to 56d.
a and 32b are fixed.

The holding means 30 includes a sensor 58 for detecting the height position of the taking-out portion 16c of the read document 16 arranged on the uppermost side of the mounting table 26, and a lower surface side of the read document 16 stacked on the mounting table 26. And a plurality of pressing members 60 that can change the height of the take-out portion 16c of the read document 16 by engaging with
a to 60d and motors (actuators) 62a to 62d for changing the height positions of the pressing members 60a to 60d based on the signal from the sensor 58.

The sensor 58 includes a light transmitter 64 and a light receiver 66, which are connected to a control circuit 68. The pressing members 60a to 60d are disposed so as to be insertable into holes 70a to 70d formed on the tip side of the mounting table 26 in the direction of arrow A, and the rack portion 72a is provided on the lower side surface of the pressing members 60a to 60d.
~ 72d are provided. The drive shafts of the motors 62a to 62d have pinion 74 meshing with the rack portions 72a to 72d.
a-74d are fixed and the motors 62a-
62d is feedback-controlled by the control circuit 68.

As shown in FIG. 1, on the mounting table 26, a movable guide member 75 which is movable in the direction of arrow B corresponding to the size of the read document 16 (for example, A5 to B3 size) and the read document. A detachable rear end guide member 77 that guides the rear end of 16 is provided.

As shown in FIG. 2, the separation / conveyance mechanism 20 includes:
The read original 16 is taken out by a predetermined distance from the stacking position on the uppermost read original 16 of the mounting table 26 by sliding contact with both ends (take-out portion 16c) of the read original 16 which intersects the conveying direction (direction of arrow A). A swingable take-out roller (take-out means) 76 and the read original 1 taken out.
A feed roller 78 which is in rocking contact with the leading end of the sheet 6 in the conveying direction and further sends the read document 16 in the conveying direction;
A return roller 80 which is arranged so as to face the feed roller 78 and which returns the other read original 16 fed integrally with the fed uppermost read original 16 to the stacking position, and the fed read original 16 And a nip roller 84 that can move back and forth with respect to the transport roller 82.

The photographing section 22 includes a photographing stand 85 which can be raised and lowered.
A plurality of endless belts 86 running around under the action of a rotary drive source (not shown) in order to convey the read original 16 sent out from the separating / conveying mechanism 20 in the direction of arrow A to a predetermined photographing position on the photographing table 85. The read original 1 is connected to the endless belt 86 which is connected to a vacuum generating means (not shown).
First and second suction boxes 88 and 90 for sucking and holding 6 and the pressure bonding for pressing the read document 16 by raising the photographing table 85 and ensuring the flatness of the read document 16. And glass 92.

The document discharge section 24 has an endless belt 86.
And a fixed tray 98 that is tilted with respect to the vertical direction.

The plate-making machine 10 includes illuminations 100a to 100 for irradiating the read document 16 with illumination light at the photographing position of the photographing section 22.
d, a reflection mirror 102 that is arranged above the pressure-bonding glass 92 at a predetermined angle, and a camera 104 that directly records the image of the read document 16 reflected by the reflection mirror 102 on a predetermined recording medium. Prepare

Next, the document placing mechanism 1 according to the first embodiment.
8 will be described in relation to the plate making machine 10.

First, a plurality of read originals 1 are placed on the mounting table 26.
6, the pulse motor 38 is driven, and the rotary shaft 42 is passed through the gear train 40 as shown in FIG.
Is rotated. Therefore, the pulleys 44a and 44b are rotated, and the pulleys 48a and 48b and the connecting rods 50a and 50b are integrally rotated under the action of the timing belts 46a and 46b. Due to the rotation of the connecting rods 50a and 50b, the lower pulleys 52a to 52d rotate and the up-and-down timing belts 56a to 56d travel around, and the bracket portion 32 fixed to a part of the up-and-down timing belts 56a to 56d.
a and 32b move up and down. Therefore, the driving of the pulse motor 38 is stopped when the mounting table 26 is arranged at a desired height position, and the uppermost read document 16 on the mounting table 26 is adjusted to a predetermined take-out height position.

Next, as shown in FIG. 2, the take-out roller 76 swings downward while rotating, and comes into sliding contact with the uppermost read document 16 on the mounting table 26.
6 rotates on both ends of the read document 16 and takes out the read document 16 in the direction of arrow A by a predetermined distance. The document 16 to be read is further conveyed in the direction of the arrow A under the rotating action of the feed roller 78, and is conveyed by the conveying roller 82 and the nip roller 84.
Meanwhile, the double feed of the read original 16 is prevented by the rotation action of the return roller 80 arranged so as to face the feed roller 78.

The read original 16 is conveyed to the photographing section 22 side via the conveying roller 82 and the nip roller 84, and the take-out roller 76, the sending roller 78 and the nip roller 84 are sequentially moved upward to be read from the read original 16. Separate. In the image capturing unit 22, first, the first suction box 88 is driven and the endless belt 86 is orbited while the read original 16 is adsorbed and held by the endless belt 86. Further, the second suction box 90 is driven, and the read original 16 is adsorbed and held by the endless belt 86 and placed at a predetermined photographing position on the photographing base 85.

Therefore, with the photographing table 85 being raised and the read original 16 being pressed and held by the pressure bonding glass 92, illumination light is emitted from the illuminations 100a to 100d constituting the plate making machine 10 and the camera 104 is attached. Energized. As a result, the pasted portion 16b such as an image, a character, and a photograph pasted on the read original 16 is directly recorded on a plate material (not shown), and a printing plate is created.

The read original 16 after the photographing is finished is taken by the photographing table 85.
Is lowered, and then the arrow A is passed through the endless belt 86.
Is conveyed in the direction, and is once dropped and supplied to the reversal tray 96. Next, the reversing tray 96 is reversed in the arrow direction around the fulcrum 94, so that the read document 16 is fixed on the fixed tray 9.
It is housed in 8.

By the way, as shown in FIG. 4, the plurality of read originals 16 stacked on the mounting table 26 are mounted on the mount 16a.
It includes a pasted manuscript having a pasted portion 16b such as a cutout such as a character or a picture or a photograph at a predetermined position above. For this reason, the height of the take-out portion 16c of each read original 16 differs depending on the number of the laminated sticking portions 16b, and the uppermost read original 16 is taken out by the take-out roller 76 only by raising and lowering the mounting table 26. It may not be possible to remove it securely.

However, in the first embodiment, in addition to the elevating means 28 for raising and lowering the mounting table 26, this mounting table 26
A holding means 30 is provided to always keep the height of the take-out portion 16c of the read original 16 stacked on the upper side constant. When the detection light emitted from the light projecting device 64 is incident on the light receiving device 66, the sensor 58 constituting the holding means 30 inputs the signal to the control circuit 68, and the control circuit 6
The reference numeral 8 designates motors 62a to 62 according to the size of the read document 16.
d is selectively driven.

When the read document 16 has the maximum size (B3 size), the motors 62a to 62d are all driven to rotate the pinions 74a to 74d, and the rack portions 72a to 72d meshing with the pinions 74a to 74d. The pressing members 60a to 60d rise through the. Therefore, the pressing members 60a to 60d press upward the front end side (the taking-out portion 16c side) of the reading original 16 on the mounting table 26, and the taking-out portion 16c of the uppermost reading original 16 blocks the light detected by the sensor 58. At this time, the motor 62a is passed through the control circuit 68.
The drive of ~ 62d is stopped.

As described above, in the first embodiment, the plurality of read originals 16 having the pasted portion 16b are placed on the mounting table 26.
When they are stacked on each other, the height of the take-out portion 16c of each read original 16 sequentially arranged at the uppermost position can be constantly kept constant via the holding means 30. Therefore, it is possible to prevent the take-out roller 76, which swings while rotating, from coming into contact with the uppermost read original 16 at a position lower than a predetermined take-out height to cause a defective take-out of the read original 16, and the read original 16 is removed. It becomes possible to take out surely and smoothly. As a result, the read document 16 is placed on the mounting table 26.
It is possible to obtain an effect that the image can be efficiently and automatically sent to the image capturing unit 22.

In the first embodiment, the pressing member 60a
.. to 60d are respectively moved up and down by dedicated motors 62a to 62d.
It is also possible to raise / lower 0d integrally with a single motor or individually via a clutch or the like.

Next, a document placing mechanism 120 according to a second embodiment of the present invention will be described with reference to FIG.

In this document placing mechanism 120, the height of a placing table 122 in which a plurality of reading originals 16 are stacked and which can be raised and lowered, and a take-out portion 16c of the reading originals 16 arranged at the top of the placing table 122 is described. And a holding member (holding means) 124 for holding at a fixed position. The holding member 124 has a plurality of block bodies having different heights according to the number of stacked read originals 16 and is detachably arranged on the tip side of the mounting table 122 (on the take-out site 16c side). There is.

The document placing mechanism 120 thus configured
In the above, a holding member 124 whose height is set according to the number of stacked read originals 16 is disposed on the mounting table 122, and the take-out portion 16c side of the read originals 16 is stacked on the holding member 124. . Then, when the number of stacked read originals 16 becomes smaller than a predetermined number, a new holding member 124 corresponding to the number of read originals 16 is arranged on the mounting table 122.

Therefore, in the second embodiment, the holding member 12
16 through which the topmost read original 16 is taken out
The same effect as in the first embodiment can be obtained, such that the height of c can be kept constant at all times and each read document 16 can be taken out reliably and smoothly.

A document placing mechanism 130 according to the third embodiment of the present invention will be described with reference to FIG.

This document placing mechanism 130 has a height of a placing table 132 on which a plurality of reading documents 16 are stacked and which can be raised and lowered, and a take-out portion 16c of the reading document 16 arranged at the top of the placing table 132. And a holding means 134 for holding at a fixed position. The holding means 134 is a pair of claw members 136 movable in the lateral direction of the mounting table 132 (direction of arrow B).
a, 136b, and these claw members 136a, 136b
Is set at a position corresponding to the lower side of the sliding contact position of the take-out roller 76.

The document placing mechanism 130 thus configured
Then, the mounting table 132 is adjusted to a predetermined height position, and the claw members 136a and 136b are attached to the mounting table 132.
The read original 16 stacked on the sheet is inserted in the lateral direction of the front end of the read original 16. Therefore, the claw member 1
A predetermined number of (five to ten) read originals 16 are held on 36a and 136b, and it is possible to prevent the take-out roller 76 slidingly contacting the uppermost read original 16 from lowering more than necessary.

When the number of read originals 16 on the claw members 136a, 136b is reduced to a desired number or less, the mounting table 132 is raised and then the claw members 136a, 13b.
6b is inserted again from the lateral direction of the read document 16.

As a result, in the third embodiment, the height of the take-out portion 16c of the read original 16 sequentially arranged at the uppermost position can be kept substantially constant through the claw members 136a and 136b. The same effects as those of the first and second embodiments can be obtained such that the read originals 16 can be taken out reliably and smoothly.

Furthermore, a document placing mechanism 140 according to a fourth embodiment of the present invention will be described with reference to FIG.

In this document placing mechanism 140, the height of a placing table 142 on which a plurality of reading documents 16 are stacked and which can be raised and lowered, and a taking-out portion 16c of the reading document 16 arranged at the uppermost position of the placing table 142 are described. And a holding means 144 for holding at a fixed position. The holding means 144 has a pair of rotatable spiral plate members 146a and 146b arranged in the lateral direction (direction of arrow B) of the mounting table 142, and the spiral plate members 146a and 146b are taken out by a take-out roller ( (Not shown)
The position is set corresponding to the lower side of the sliding contact position.

The document placing mechanism 140 thus configured
Then, depending on the number of stacked read originals 16, the mounting table 1
When 42 is raised to a predetermined height position, the spiral plate members 146a and 146b that sandwich the end of the read document 16 on the take-out portion 16c side are rotated. For this reason, the take-out portion 16c of the read document 16 has the spiral plate member 14
6A and 146b are forcibly lifted, and the uppermost read original 16 is accurately held at the take-out portion 16c at a predetermined take-out height position. Therefore, in the fourth embodiment, the same effect as in the first to third embodiments can be obtained.

A document placing mechanism 150 according to the fifth embodiment of the present invention will be described with reference to FIG.

In the document placing mechanism 150, the height of a placing table 152 on which a plurality of reading documents 16 are stacked and which can be raised and lowered, and a take-out portion 16c of the reading document 16 arranged at the uppermost position of the placing table 152 are described. And a plurality of holding members (holding means) 154 for holding at a fixed position. Holding member 154
Is fixed below the mounting table 152, and is arranged so as to be insertable into a plurality of holes 156 formed on the tip side of the mounting table 152.

The document placing mechanism 150 thus configured
In the above, the take-out portion 16c of each read document 16 is pushed up via the plurality of holding members 154 protruding upward from the hole 156 of the mounting table 152. Therefore, the taking-out portion 16c of the uppermost read document 16 is securely held at the predetermined taking-out height position.

Then, when the number of read originals 16 on the mounting table 152 decreases, the mounting table 152 is raised. At that time, since the holding member 154 is fixed below the mounting table 152, the mounting table 1 of the holding member 154 described above.
52 The amount of protrusion above 52 is relatively reduced. Therefore, as the number of read originals 16 on the mounting table 152 decreases, the amount of pushing up the take-out portion 16c of the read originals 16 decreases, and it is necessary to perform position adjustment work or replacement work of the holding member 154. There is no. As a result, the same effect as in the first to fourth embodiments can be obtained, such that the height of the take-out portion 16c of the uppermost read original 16 can be constantly maintained.

[0049]

According to the document placing mechanism of the document conveying apparatus of the present invention, the following effects can be obtained.

The height position of the above-mentioned placing table is adjusted under the action of the elevating means according to the number of stacked reading originals on the placing table, and the read-out document taking-out portion arranged at the uppermost part of the above-mentioned placing table is adjusted. The height position is adjusted via the holding means.
Therefore, even when a plurality of pasted originals are stacked as the read originals, the height of the take-out portion of the uppermost pasted original can be constantly kept constant. As a result, the pasted original can be taken out reliably and smoothly, and the efficiency of the original conveying operation can be easily performed.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a plate making machine in which a document conveying device incorporating a document placing mechanism according to a first embodiment of the present invention is mounted.

FIG. 2 is a front view of a schematic configuration of the document feeder.

FIG. 3 is a perspective view for explaining a main part of the document placing mechanism.

FIG. 4 is a vertical sectional front view of a main part of the document placing mechanism.

FIG. 5 is a vertical sectional front view of an essential part of a document placing mechanism according to a second embodiment of the present invention.

FIG. 6 is a perspective view of a main part of a document placing mechanism according to a third embodiment of the present invention.

FIG. 7 is a perspective view of a main part of a document placing mechanism according to a fourth embodiment of the present invention.

FIG. 8 is a vertical cross-sectional front view of essential parts of a document placing mechanism according to a fifth embodiment of the present invention.

FIG. 9 is a vertical sectional front view of a main part of a document placing mechanism according to a conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Plate-making machine 12 ... Base 14 ... Original document conveying device 16 ... Original document 18 ... Original document placing mechanism 20 ... Separation / conveying mechanism 22 ... Photographing section 24 ... Original document ejecting section 26 ... Placing table 28 ... Elevating means 30 ... Holding means 38 ... Pulse motors 56a to 56d ... Elevating timing belt 58 ... Sensors 60a to 60d
... Pressing members 62a to 62d ... Motor 68 ... Control circuit 76 ... Ejecting roller 78 ... Sending roller 85 ... Shooting table 86 ... Endless belt 92 ... Pressing glass 120 ... Document placing mechanism 122 ... Placement table 124 ... Holding member 130 ... Document placing Mounting mechanism 132 ... Mounting table 134 ... Holding means 136a, 13
6b ... Claw member 140 ... Original document placement mechanism 142 ... Loading table 144 ... Holding means 146a, 14
6b ... Spiral plate member 150 ... Document placing mechanism 152 ... Loading table 154 ... Holding member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideki Sasaki 1005 Kozoen, Ayase City, Kanagawa Prefecture, Fuji Micrographics Co., Ltd. In the company

Claims (2)

[Claims] 1. A read document including a pasted document is conveyed one by one to a reading unit via a take-out means and positioned, and after the reading process is performed by the reading unit, the read document is discharged to a discharge unit. In an original transporting apparatus for stacking, an original placement mechanism for accommodating a plurality of originals to be read, which is used for accommodating a plurality of originals to be read, and a platform for raising and lowering the original. An original document characterized by comprising: an elevating means; and a holding means for holding a height of a take-out portion of the read original placed at the uppermost position of the placing table, which is engaged with the take-out means, at a constant position. Document placement mechanism in the transport device. 2. The document placing mechanism according to claim 1, wherein the holding means includes a sensor for detecting a height position of a taken-out portion of the read document placed at the top of the placing table, and A plurality of pressing members that engage the stacked read originals and that can change the height of the take-out portion of the read originals, and an actuator that changes the height position of the press members based on a signal from the sensor. A document placing mechanism in a document feeding device, comprising: