JPH0977286A - Cut paper sheet feeding method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a blur of printing of the back end of a cut paper sheet and stains due to adhesion of toner and surely feed a long cut paper sheet in a cut paper sheet feeder. SOLUTION: In case of sucking and carrying out cut paper sheets 14 stacked in a hopper 12 in a cut paper sheet feeder 10 by a pick roller 16, the rotating speed of a motor 24 is controlled from a central control device 36 in such a manner as to drive the pick roller 16 in rotation until the back end of a cut paper sheet 14 passes the pick roller 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cut sheet feeding method and apparatus, and is particularly suitable for use in an enclosing and sealing system when cut sheets to be inserted into an envelope are cut out one by one from a hopper and sent out. , A cut sheet feeding method and apparatus.

[0002]

2. Description of the Related Art A cut sheet feeding device in a conventional enclosing and sealing system is designed so that a negative pressure is generated when a cut sheet is floated by blowing pressure air from the lower side of the cut sheets accumulated horizontally in a hopper. A pick roller equipped with a large number of suction holes to be applied adsorbs and feeds one sheet of cut paper at the lowermost end, and the leading edge of the fed cut paper is pinched by a transport roller, and is sequentially transported to a transport path. is there.

[0003]

However, in the conventional apparatus, the trailing edge of the cut sheet sent by the pick roller comes into contact with the pick roller, so that the printed portion on the surface of the cut sheet is blurred or the toner is not printed. There is a problem in that it adheres and stains. Further, since the number of rotations of the pick roller per feed of the cut sheet is adjusted to the distance until the leading edge of the cut sheet reaches the adjacent conveyance roller, the reliability when the long cut sheet is conveyed. There was a problem that was low.

The present invention has been made in view of the above-mentioned problems of the prior art, and it is possible to reliably pick out a long cut sheet without causing blurring or dirt on the rear end portion of the cut sheet. An object of the present invention is to provide a cut sheet supply method and device that can perform the cut sheet supply.

[0005]

According to the method of the present invention, as described in claim 1, the cut sheets stacked horizontally in the hopper are rotated by rotating a pick roller to which a negative pressure is applied. From the side, the sheets are adsorbed one by one in order from the side and conveyed horizontally, and the cut paper fed by the pick roller is nipped from the leading end side by the rotation of the conveying roller arranged adjacent to the pick roller, and the conveying path is held. In the method of feeding the cut sheet, the rear end of the cut sheet sucked from the hopper and conveyed out passes through the pick roller,
The object is achieved by rotating the pick roller in the conveying direction.

According to a second aspect of the present invention, as described in claim 2, a pick roller for feeding the cut sheets stacked in the hopper one by one from the lower side by suction suction rotation by negative pressure, and the pick roller. A conveyance roller that is disposed in front of the roller in the paper feeding direction, rotates the cut sheet fed from the pick roller while sandwiching it from the leading end side, and further conveys it to the front, and a control that controls the rotation of the pick roller. In a cut sheet feeding device comprising a device, the control device, until the trailing edge further passes the pick roller after the leading edge of the cut sheet reaches the transport roller via the pick roller, By rotating the pick roller, the above object is achieved.

According to a third aspect of the invention, in the second aspect of the invention, the length of the cut sheet to be conveyed is detected downstream of the conveying roller, and the detected value is output to the control device. A detection device is provided, and the control device controls the number of rotations of the pick roller per one cut sheet feeding based on at least the first detection value.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the cut sheet feeding apparatus 10 according to the embodiment of the present invention cuts the cut sheets 14 horizontally stacked in the hopper 12 by a pick roller 16 from the lower side one by one. Take out, this, the first to third
Carry out to the conveying path 20 via the conveying rollers 18A to 18C,
It supplies to the next device, for example, an encapsulation device (not shown).

The bottom surface of the hopper 12 is composed of an air box 22 having a large number of air outlets 22A formed on the upper surface thereof, and the pressurized air blown upward from the air outlets 22A causes the inside of the hopper 12 to move. The cut sheets 14 that are stacked are floated at a constant height.

The pick roller 16 is an air feed roller arranged so as to face the opening 12A on the left side of the lower end of the hopper 12 in the figure, with its upper end projecting upward from the upper surface of the air box 22. An outer cylinder 16B having a hole 16A formed therein, and an inner cylinder 16C arranged inside the outer cylinder 16B so as to open the suction hole 16A only in the upper range of about 60 ° in the rotation direction. It is configured with.

The outer cylinder 16B of the pick roller 16 is rotationally driven in the counterclockwise direction in the figure by a motor 24 via a belt 24A, and the inner cylinder 16C is the outer cylinder 1
6B is non-rotatably supported inside, and the suction side of the blower fan 26 is connected to the inside thereof via a vacuum tube 26A, whereby the inside of the inner cylinder 16C,
Also, a negative pressure can be applied to the suction hole 16A within the angular range of about 60 ° on the upper side in the outer cylinder 16B.

The discharge side of the blower fan 26 is communicated with the inside of the air box 22 via a blow pipe 26B, and pressurized air is supplied into the air box 22.

The first to third conveying rollers 18A to 18C
Is rotated counterclockwise in the drawing by a timing belt driven by a motor 28.

More specifically, the timing belt is attached to the belt wheel 30A attached to the output shaft of the motor 28, the belt wheels 19A and 19C and the belt wheel 30C attached to the first and third conveying rollers 18A and 18C, respectively. 30 is wound, whereby the first and the third
The transport rollers 18A and 18C are driven.

Further, a belt wheel 30B is arranged between the belt wheels 30A and 30C, and the timing belt 30 is wound around the belt wheel 30B and driven and rotated.

A drive belt wheel 31B is coaxially attached to the belt wheel 30B via a clutch 32B, and a timing belt 33B is provided between the drive belt wheel 31B and the belt wheel 19B of the second conveying roller 18B. When the clutch 32B is wound and the clutch 32B is turned on (connected), the second conveyor roller 18B is driven by the timing belt 30.

A drive belt wheel 31C is coaxially arranged on the belt wheel 30C via a clutch 32C, and the drive belt wheel 31C and a group of transport rollers 20A forming a part of the transport path 20. The timing belt 33C is wound between the clutch 32C
When is on, the transport roller group 20A is driven counterclockwise in FIG.

The first to third conveying rollers 18A to 18C
A roller 34 that is in contact with the conveying roller group 20A is disposed above the conveying roller group 20A, and the cut sheet 14 fed from the hopper 12 is sandwiched between the conveying rollers and is fed to the left in FIG. Has been

Reference numeral 36 in the drawing denotes a central control unit, which is connected to the blower fan 2 via motor drivers 38A to 38C.
The six motors, the motor 24, and the motor 28 are driven and controlled, respectively.

The central control unit 36 also receives the clutch 32 via the clutch control drivers 40B and 40C.
The B and 32C are controlled to be turned on and off respectively.

The central control unit 36 includes the transport path 2
The thickness sensor 42 and the length sensor 4 arranged along 0
4 and an OMR (Optical Mark Reader) mark reading sensor 46 receives a signal indicating the thickness and length of the cut sheet 14 and the presence or absence of an OMR mark.

The thickness sensor 42 and the length sensor 44
Is the second transport roller 18B and the third transport roller 18C.
And the OMR mark reading sensor 4 disposed at a position between
6 is disposed on the output side of the third transport roller 18C.

Reference numeral 48 in FIG. 1 is a storage device for storing the calculation result and the like in the central control device 36 and outputting it to the central control device 36 as required. Further, reference numeral 50 in FIG. 1 denotes an input device, which is used, for example, when the length dimension of the cut paper 14 in the hopper 12 in the feeding direction is input to the central control device 36.

The central control unit 36 controls the number of rotations of the motor 24 for one feeding of the cut sheet 14 through the motor driver 38B until the trailing edge of the cut sheet 14 passes the pick roller 16. The pick roller 16 is controlled to rotate.

Here, the set number of rotations of the motor 24 depends on the length of the cut sheet 14 which is known in advance.
Manually set in the central control unit 36 from this, and when the first one of the cut sheets 14 stacked in the hopper 12 is carried out by this set value, the length of the cut sheet 14 is set to the above-mentioned value. It is detected by the length sensor 42, and the central control device 36 calculates and controls the rotation speed of the motor 24 based on the detected value.

The thickness sensor 42 includes a pair of pinch rollers 42A and 42B, and detects the thickness of the cut sheet 14 based on the distance between the pinch rollers 42A and 42B.

The length sensor 44 optically detects the leading edge and the trailing edge of the cut sheet 14, and the OMR mark reading sensor 46 is recorded in advance on the cut sheet.
For example, this is for reading an OMR mark in which information such as the type of processing to be performed by the enclosing and sealing machine is recorded and automatically performing each processing.

Next, the operation of the apparatus of the above embodiment will be described with reference to FIG.
This will be described with reference to FIG.

After the processing is started, in step 101, it is judged whether the driving amount (rotational speed) of the motor 28 has been calculated according to the length of the cut sheet 14, that is, whether the cut sheet length has been taught. If positive, go to step 102,
If not, that is, if the operation of releasing the preset teaching completion such as the power off or the key operation of the input device 50 is performed, the process proceeds to step 103.

In step 103, the motor 24 is driven by the initial set amount, and the one cut sheet 14 at the lowermost end is picked by the pick roller 16 from the hopper 12, and this is picked up in the direction of the first to third conveying rollers 18A to 18C. And the length is measured by the length sensor 44. Based on the obtained length (detected value), the central controller 36 calculates the optimum drive amount (rotation amount) of the motor 24 by the set calculation method, stores it in the storage device 48, and stores it in step 104. move on.

In step 104, it is determined whether or not an error such as a jam has occurred. If an error has occurred, the process is terminated, and if not, the process proceeds to step 105.

In step 105, it is judged whether the cut sheet that has been taught is conveyed to the downstream unit as it is or removed as it is.
At 6, the cut sheet is removed. After the removal or when the removal is unnecessary, the process proceeds to step 107.

In step 102, the motor 28 is driven by the optimum driving amount that is taught, and the cut sheet 14 at the lowermost end is picked by the pick roller 16,
Go to step 108. In step 108, if there is an error in the picked cut paper, the process ends, and if there is no error, the process proceeds to step 107.

In step 107, the picked cut paper 14 is conveyed to the downstream unit, and if an error occurs in the middle, the process is ended in step 109, and if there is no error, the process proceeds to step 110, such as pressing the stop key. If there is a stop instruction, the process is stopped. If there is no stop instruction, the process returns to step 101 and the next cut sheet 1
The conveyance of 4 is repeated.

In the above process, the cut sheets 14 in the hopper 12 are adsorbed one by one from the lowermost end to the suction holes 16A of the pick roller 16, and the outer cylinder 1 of the pick roller 16 is sucked.
According to the rotation of 6B, the first to third transport rollers 18A to 1
It is sent out one by one in the 8C direction.

At this time, the feed amount of the cut sheet 14 by the pick roller 16 is such that the motor 28 is continuously driven until the rear end of the cut sheet 14 passes the pick roller 16. Also, the trailing edge of the cut sheet 14 does not come into contact with the pick roller 16 to cause blurring or stains.

Further, the pick roller 16 feeds the cut paper 14 until the rear end of the cut paper 14 to be conveyed passes, so that the pick operation of the cut paper 14 from the hopper 12 can be surely performed. .

In the cut sheet feeding device 10, the number of rotations (driving amount) of the motor 24 per one cut sheet feeding is such that the length sensor 44 is used to actually feed one cut sheet 14. Although the teaching is performed to the central control device 36 by detecting the length, the present invention is not limited to this. For example, the input device 50 only inputs the length of the cut paper 14 which is known in advance. May be Further, every time one cut sheet 14 is conveyed, the length sensor 4
The length may be detected in 4 and output to the central controller 36 for feedback control to be reflected in the next pick operation.

[0040]

EFFECTS OF THE INVENTION Since the present invention is constructed as described above, it is possible to prevent blurring of printing caused by the trailing edge of a cut sheet coming into contact with the pick roller and stains due to adhesion of toner, and long cuts. It has an excellent effect that it can be reliably conveyed even on paper.

[Brief description of drawings]

FIG. 1 is a schematic sectional view including a partial block diagram showing a cut sheet feeding device according to an example of an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the cut sheet feeding device.

[Explanation of symbols]

 10 ... Cut paper supply device 12 ... Hopper 14 ... Cut paper 16 ... Pick roller 16A ... Suction hole 18A-18C ... 1st-3rd conveyance roller 20 ... Conveyance path 24 ... Motor 36 ... Central control device 44 ... Length sensor 48 ... storage device 50 ... input device

Claims (3)

[Claims] 1. Cut papers stacked horizontally in a hopper are adsorbed one by one in order from the lower side by a pick roller to which a negative pressure is applied, and are conveyed horizontally, and adjacent to the pick roller. In the cut paper feeding method, in which the cut paper sent out by the pick roller is nipped from the tip side and sent to the conveyance path by the rotation of the feed rollers arranged in The method of feeding cut paper, characterized in that the pick roller is rotated in the transport direction until it passes the pick roller. 2. A pick roller for feeding cut papers stacked in a hopper one by one from the bottom side by suction suction rotation by negative pressure, and a pick roller arranged in front of the pick roller in the paper feeding direction. The cut paper that is sent,
In a cut sheet supply device comprising a conveyance roller that rotates while sandwiching from the leading end side and further conveys it forward, and a control device that controls the rotation of the pick roller, wherein the control device is the cut sheet. The cut paper feeding device, characterized in that the pick roller is rotated until the rear end passes through the pick roller after the front end of the roller reaches the conveying roller via the pick roller. 3. A length detection device for detecting the length of the cut sheet being conveyed and outputting the detected value to the control device, on the downstream side of the conveyance roller according to claim 2, The cut sheet feeding apparatus is characterized in that the apparatus controls the number of rotations of the pick roller per one cut sheet feeding based on at least the first detection value.