JPH06143197A - Perforation forming device and perforation forming method - Google Patents

Abstract

PURPOSE:To provide a perforation forming device which is designed to form perforations in a short time in a direction, extending at right angles with a conveying direction, in the arbitrary position of a paper sheet without stopping continuously conveyed paper sheets once, in a perforation forming device used for an electronic photographic duplicator and a printer and designed to form perforations in a copied or printed paper sheet, where occasion demands. CONSTITUTION:A perforation blade 2 is attached axially of the outer peripheral surface of an edged roller 3 in a state to point to the outside in a radial direction. The edged roller 3 is rotationally driven with the aid of a drive motor 4 and movable by an axis moving device 5 between a position where the edged roller is forced into pressure contact with a contact roller 7 and a position where it is separated away therefrom. A conveyance passage for the paper sheet is arranged such that it passes between the edged roller 3 and the contact roller 7 and a sensor 1 to detect the paper sheet is arranged in a position situated upper stream from a pressure contact position therebetween. Arrival of the paper sheet is detected by the sensor, and based on data, such as the conveying speed of the paper sheet and the position, where perforations are formed, of the paper sheet, the drive motor 4 and the axis moving device 5 are controlled by means of a control device 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a perforation forming apparatus which is used in an electrophotographic copying machine, a printing machine or the like and which perforates a copied or printed sheet as needed.

[0002]

2. Description of the Related Art Conventionally, a perforation forming apparatus for perforating a copied or printed sheet in a post-processing step of a copying machine, a printing machine or the like has been known, for example, as shown in FIGS. 5 and 6. There is. The perforation forming apparatus shown in FIG.
The disk-shaped perforation forming blade 101 is installed in the vicinity of the paper transport path and rotates substantially in a direction perpendicular to the transport direction of the copy paper 102 while rotating in contact with the surface of the paper. In such a perforation forming apparatus, the copied copy paper 102 is temporarily stopped at a predetermined position during conveyance, and a disk-shaped perforation forming blade 101 is brought into contact with the paper surface to move from left to right or right. From left to right,
Perforations are formed at appropriate positions in the copy paper.

The perforation forming apparatus shown in FIG. 6 is installed at a position close to a sheet conveying path in a copying machine.
Has a flat plate-shaped member 111 to which a perforation blade 112 is attached over the entire length in the width direction. The flat plate-shaped member is provided substantially parallel to the surface of the copy paper 103 and is supported so as to be able to move up and down so that the perforation blade can be pressed against the paper. In such a perforation forming apparatus, the copied copy paper is temporarily stopped at a predetermined position during conveyance, and the flat plate member is moved downward to press the paper surface to press the perforated paper at an appropriate position. You can put it in.

[0004]

However, the perforation forming apparatus as described above has the following problems. In the perforation forming apparatus shown in FIG. 5, it is necessary to temporarily stop the conveyance of the copy sheet and move the perforation forming blade from one end to the other end of the sheet to make a perforation. There is a problem that it takes too much time to insert perforations.

Also in the perforation forming apparatus disclosed in FIG. 6, when the perforations are inserted, the perforations may spread in the paper conveyance direction unless the conveyance of the paper is temporarily stopped. There is a problem in that the number of sheets that can be conveyed within a predetermined time cannot be increased by temporarily stopping the sheets, and it cannot be applied to high-speed copying or high-speed printing.

The present invention has been made in view of the above problems, and an object of the present invention is not to temporarily stop the conveyance of copied or printed sheets, but to arbitrarily set the sheets conveyed one after another. An object of the present invention is to provide a perforation forming device capable of perforating a position at high speed.

[0007]

In order to solve the above problems, the invention according to claim 1 forms perforations on sheets which are successively conveyed at a right angle to the conveying direction of the sheets. In the perforation forming apparatus, a sensor that detects the arrival of the front end of the paper in the paper transport path where the paper is transported, and a sensor that is installed on the downstream side of the sensor in the paper transport path and that moves the paper in the axial direction of the outer peripheral surface A bladed roller in which a perforated blade is linearly attached over the entire length in the width direction, a drive motor for rotationally driving the bladed roller, and a bladed roller provided at a position in contact with the bladed roller. A contact member whose surface is moved at substantially the same speed as the peripheral speed of the blade roller while the sheet is sandwiched between the contact roller and a position where the blade roller is pressed against the contact member. Away from A shaft moving device for moving between, on the basis of a signal from the sensor controls the driving of the driving motor, it is assumed that a control device for controlling the operation of the shaft moving device.

A perforation forming method according to a second aspect of the present invention uses the perforation forming apparatus according to the first aspect, wherein the perforated blade of the bladed roller is at a predetermined position. The bladed roller is stopped at a distance from the abutting member, and when the sensor detects the arrival of the leading edge of the paper, after a lapse of a transportation time determined by a preset perforation position. The bladed roller is activated, and the bladed roller is pressed against the contact member at the same time as or after the activation of the bladed roller.

The perforation blade mounted on the outer peripheral surface of the bladed roller is attached so that the blade is directed substantially outward in the radial direction, and the peripheral surface of the bladed roller is pressed against the paper,
The shape of the perforation blade, the length of the blade, and the like can be appropriately set as long as the perforation can be formed in a direction substantially perpendicular to the sheet conveying direction. The abutting member may be any member as long as it is pressed against the outer peripheral surface of the bladed roller with a substantially constant pressure and the surface moves together with the peripheral surface of the bladed roller, and may be a cylindrical roller or a belt-shaped member. it can. Further, it is desirable that the surface is formed of an elastic body such as rubber so that the perforation blade does not hinder the biting.

The structure of the shaft moving device may be appropriately designed as long as it can move the rotary shaft of the bladed roller to press the outer peripheral surface of the bladed roller into contact with or separate from the contact member. Yes, for example, an electromagnet is turned on by a relay,
It is possible to use a structure that is turned off and the rotating shaft is moved by the magnetic force of this electromagnet. The control device is
Based on the time when the sensor detects the arrival of the leading edge of the paper, it controls the start / stop of the drive motor and the operation of the axis moving device so that the perforation is placed at a predetermined position on the paper. It is possible to store the positional information on the paper forming the sheet, and it is possible to use a microcomputer having a function of calculating the operation timing of the drive motor and the shaft moving device and a clock.

[0011]

In the perforation forming apparatus according to the first aspect of the present invention, there is provided a perforated roller in which a perforation blade is linearly attached over the entire length in the width direction of the paper in the axial direction of the outer peripheral surface, and The bladed roller is in contact with the bladed roller, and the surface of the bladed roller moves at the same speed as the peripheral speed of the bladed roller. Since the sheet is driven to rotate by the drive motor, the sheet is conveyed along with the rotation of the bladed roller, and perforations are formed on the sheet when the perforation blade reaches the contact position with the contact member. Therefore, it is possible to make perforations in a direction substantially perpendicular to the conveying direction without temporarily stopping the conveyance of the sheet. Further, a sensor for detecting the arrival of the leading edge of the sheet is provided on the upstream side of the bladed roller in the sheet conveyance direction, and the control device drives the drive motor for rotating the bladed roller based on the signal output from this sensor. Since the operation of the shaft moving device that brings the surface of the bladed roller into contact with or separate from the contact member is controlled, it is possible to efficiently form perforations at any position on the conveyed paper. Become.

In the perforation forming method according to the second aspect of the present invention, the bladed roller is stopped so that the perforation blade is at a predetermined position, and the perforation is inserted after the sensor detects the arrival of the leading edge of the paper. Since the bladed roller is started and the bladed roller and the contact member are pressed against each other after the conveyance time determined by the position has elapsed, the information such as the sheet conveyance speed and the position of the bladed roller is used. It is possible to easily set the starting time of the bladed roller and the time of press contact with the contact member, and to control the drive of the bladed roller and the operation of the shaft moving device so that perforations are formed at arbitrary positions. It can be easily performed.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. 1 (a) and 1 (b) are schematic configuration diagrams showing a perforation forming apparatus which is an embodiment of the invention described in claim 1, and FIG. 1 (c) shows a driving state thereof. It is a timing diagram. This perforation forming device is provided with a sensor 1 for detecting the arrival of the leading edge of a sheet sent in a sheet transport path 9 for transporting a copy sheet 8 and a downstream side of the sensor 1 in the transport direction of the copy sheet 8. A bladed roller 3 that is installed and has a perforated blade 2 on its outer peripheral surface, a drive motor 4 that rotates the bladed roller 3, and a roller 3 that contacts the bladed roller 3 and rotates with the bladed roller 3. The driven contact roller 7, the shaft moving device 5 that presses or separates the bladed roller 3 from the contact roller 7, and the drive of the drive motor 4 based on a signal from the sensor 1 are controlled. Control device 6 for controlling the operation of moving device 5
And have.

The sensor 1 is installed in the vicinity of the sheet conveying path 9 and can detect the leading edge of the fed sheet and output a signal to the controller 6. The bladed roller 3 is a cylindrical body installed on the paper transport path 9 so that the rotation axis is substantially perpendicular to the transport direction of the paper 8, and the axial direction of the outer peripheral surface is the width direction of the paper 8. One perforation blade 2 is linearly attached over the entire length of the. The perforation blade is mounted such that the blade is directed outward in the radial direction, and the tip is slightly projected from the peripheral surface, so that the blade tip penetrates into the sheet pressed against the peripheral surface.

The contact roller 7 is provided at a position where it comes into contact with the bladed roller 3, and can sandwich the sheet 8 between it and the bladed roller 3, and as the bladed roller 3 rotates. The surface is driven at the same speed as the peripheral speed. The surface of the contact roller 7 is formed of an elastic member such as rubber, and the perforation blade 2 of the bladed roller 3 is used.
Even if the edge of the blade is bitten, it does not hinder the rotation of the bladed roller 3.

As shown in FIG. 2, the shaft moving device 5 is installed at both ends of the rotary shaft 13 of the bladed roller 3, and is made of a plastic material and has a bearing 14 for supporting the rotary shaft 13.
A magnetic member 15 fixed to the bearing 14, a spring member 16 that supports the bearing from above, and an electromagnet 17 that faces the magnetic member 15 from below constitute a main part. The electromagnet 17 is turned on and off by a relay (not shown) which is operated by a signal from the control device 6.
When the electromagnet 17 is turned on, the force of attracting the magnetic member 15 causes the spring member 16 to expand and the rotary shaft 13 to move downward to move the bladed roller 3 The surface of is contacted with the contact roller 7 at a constant pressure. When the electromagnet 17 is turned off,
The rotating shaft 13 is moved upward by the force of the spring member 16, and the bladed roller 3 and the contact roller 7 are maintained in a separated state.

The control device 6 drives the drive motor 4 and operates the shaft moving device 5 so that perforations can be formed at appropriate positions based on the information input in advance and the signal input from the sensor 1. A microcomputer having a clock for measuring the drive timing of the drive motor 4 or the shaft moving device 5, an information storage means, and a calculation means is used. This control method will be described later. As shown in FIG. 3, the perforation forming device transfers a toner image formed on the photoconductor drum 20 onto a sheet of paper in a copying machine, and a fixing device 23.
It is installed between the two paper discharge rolls 21 and 22 that convey the copy paper after being fixed by.

Next, an operation of the perforation forming apparatus, which is an embodiment of the invention described in claim 2, will be described. As shown in FIG. 1A, from the contact portion a between the bladed roller 3 and the contact roller 7, the sensor 1
To X ₁ (mm), and the circumference from the contact position a between the blade roller 3 and the contact roller 7 to the perforation blade 2 is X ₂
(Mm), and the distance from the leading edge of the paper to the position where the perforation is inserted is L (mm). The bladed roller 3 is set so that the perforated blade 2 always returns to the same position, that is, the position of the peripheral length X ₂ from the contact portion a and stops.

FIG. 4 is a flow chart showing the perforation forming method. First, before starting the copying machine, input that a perforation is to be formed from the input key of the copying machine in advance, and then the distance L (m
Enter m). When this distance L is input, the leading end of the copy sheet 8 is fed from the sensor 1 to L + (X ₁ -X ₂ ) ...・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Time t ₁ (s) until reaching the distance of (1) is calculated by the following equation. _{t 1 = {L + (X} 1 -X 2)} / V

When the copying machine is started and a series of copying steps are performed, the arrival of the leading edge of the copy sheet 8 is detected by the sensor 1 in the sheet conveying path 9. Further, as shown in FIG. 1C, t ₁ (S) is detected after the arrival of the copy paper 8 is detected.
After a lapse of time, the drive motor 4 is started and the electromagnet relay in the shaft moving device 5 is turned on. As a result, the rotation of the bladed roller 3 is started, and at the same time, the outer peripheral surface of the bladed roller 3 is pressed against the contact roller 7. Further, when the copy sheet 8 is conveyed through the sheet conveying path 9 and the leading edge of the sheet is conveyed by X ₂ as the bladed roller 3 rotates (t ₂
After a lapse of time, the perforation of the bladed roller 3 reaches the contact position with the contact roller 3 at t ₂ = X ₂ / V), and the perforation is formed on the copy sheet 8 sandwiched between these two rollers. It is formed. At this time, the leading edge of the paper 8 is L + X from the sensor 1.
The distance is ₁ and the perforation is L from the leading edge of the paper.
It is formed at a position of (mm) in a direction substantially perpendicular to the sheet conveying direction.

When perforations are formed on the copy sheet 8,
The electromagnet relay is turned off, and the bladed roller 3 is separated from the contact roller 7. After that, when the perforation blade 2 reaches a predetermined initial position by the rotation of the bladed roller 3, the drive motor 4 is stopped and the bladed roller 3 is stopped. The perforation forming device operates only when an instruction to form a perforation is input from the input key of the copying machine.

When the image is enlarged or reduced,
When the position L (mm) where the perforation is inserted in the original is keyed in, the arithmetic correction is performed in the control device 6 to calculate the perforation formation position L ″ (mm) corresponding to the enlarged or reduced image. The perforation position is L (mm)
Then, assuming that K (%) is expanded, L ″ is obtained by the following formula: L ″ (mm) = L (mm) × (1 + K / 100) Substituting this value into L of the above formula (1) A correction value is obtained. As a result, even when the image is enlarged or reduced, the position where the perforations are formed is automatically corrected, and the perforations can be formed at appropriate positions of the copied image.

[0023]

As described above, in the perforation forming apparatus according to the first aspect of the present invention, the operation of the shaft moving device that presses or separates the bladed roller from the contact member and the drive motor that rotates the bladed roller. The drive is controlled by the control device, and the perforation is formed by sandwiching the paper between the rotating bladed roller and the contact member, so that the conveyance of the paper is not stopped and the constant speed is maintained. With this, it becomes possible to form perforations on the sheet while continuing the conveyance, and the perforation forming time can be shortened. Therefore, even when the sheets are conveyed one after another at a high speed, it is possible to surely make a perforation at an arbitrary position.

Further, in the perforation forming method according to the second aspect, the bladed roller is stopped so that the perforation blade is located at a predetermined position, and it is determined by the position where the perforation is inserted after the arrival of the leading edge of the paper is detected by the sensor. Since the bladed roller is started and pressed against the contact member after the elapse of the conveying time, the sheets to be conveyed are accurately positioned at predetermined positions without stopping. It becomes possible to form perforations in the.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a perforation forming apparatus which is an embodiment of the invention described in claim 1 and a timing chart showing the operation of the perforation forming apparatus.

FIG. 2 is a schematic structural diagram showing an axis moving device used in the perforation forming device.

FIG. 3 is a schematic configuration diagram showing a copying machine in which the perforation forming device is installed.

FIG. 4 is a flow chart showing a perforation forming method which is an embodiment of the invention described in claim 2.

FIG. 5 is a schematic configuration diagram showing an example of a conventional perforation forming apparatus.

FIG. 6 is a schematic configuration diagram showing another example of a conventional perforation forming apparatus.

[Explanation of symbols]

1 Sensor 2 Perforation Blade 3 Blade Roller 4 Drive Motor 5 Shaft Moving Device 6 Control Device 7 Contact Roller 8 Copy Paper 9 Paper Conveying Path 13 Rotating Shaft 14 Bearing 15 Magnetic Member 16 Spring Member 17 Electromagnet 20 Photosensitive Drum 21, 22 paper discharge roll 23 fixing device

Claims (2)

[Claims] 1. A perforation forming device for forming perforations on sequentially conveyed sheets at a right angle to a conveying direction of the sheets, wherein a leading edge of the sheet reaches a sheet conveying path along which the sheets are conveyed. A sensor for detecting the, and a roller with a blade that is installed on the downstream side of the sensor in the paper transport path and has a perforated blade linearly attached to the outer peripheral surface in the axial direction over the entire length in the width direction of the paper. A drive motor that rotationally drives the bladed roller, is provided at a position where the bladed roller abuts, sandwiches the sheet between the bladed roller, and rotates the bladed roller around its circumference. A contact member whose surface moves at substantially the same speed as the speed, an axis moving device that moves the bladed roller between a position in which the blade roller is pressed against the contact member and a position separated from the contact member, and a signal from the sensor. Based on A perforation forming device, comprising: a control device that controls the drive of the drive motor and that controls the operation of the shaft moving device. 2. The perforation forming apparatus according to claim 1, wherein the bladed roller is stopped so that the perforation blade is at a predetermined position and is separated from the contact member, From the time when the sensor detects the arrival of the leading edge of the paper, after the elapse of a transport time determined by a preset perforation position, the bladed roller is activated, and simultaneously with or after the activation of the bladed roller, A perforation forming method, wherein a bladed roller is brought into pressure contact with the contact member.