JPH1035966A - Wound paper feeding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a wound paper with a large diameter usable to save the labor of sheet replacement and form a large quantity of printed matters in a short time by connecting a sheet truck to a paper feeding device added to an electronic printer, arid drawing the wound sheet on the sheet truck by the feed roller of the paper feeding device to supply it to the electronic printer. SOLUTION: A feed roller 22 is rotated to draw a wound sheet 11 from a sheet truck 10, and the wound sheet 11 is drawn from a paper feeding device 20 by an existing sheet carrying mechanism 41 provided on an electronic printer 40. At that time, the rotation of the feed roller 22 is controlled on the basis of the signal of a sheet sagging detecting means 27 to control the staying quantity of the sheet in the paper feeding device within a constant range. Further, in order to more stabilize the feed of the sheet from the paper feeding device 20 to the electronic printer 40, the feeding device 20 has a tension means 28 for imparting a fixed tension to the sheet in the sheet outlet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feeding device for an electronic printing device such as an electrophotographic printer for recording image information on paper, and more particularly, to a paper feeding device capable of high-speed printing. The present invention relates to a take-up sheet feeding device for supplying a take-up sheet.

[0002]

2. Description of the Related Art In recent years, an electrophotographic laser beam printer which forms a dot image using a laser beam as a light source, an ink jet printer having a large number of nozzles, and an ion printer which has a large number of application electrodes and forms an image with an ink mist. Electronic printing devices such as printers have been commercialized,
In addition, devices that can print full-color images have been developed,
An image can be formed at a speed comparable to a printing machine using a conventional printing plate and printing ink.

In order to stabilize the printing operation, these high-speed electronic printing apparatuses use a continuous web instead of a sheet. However, from the viewpoint of operability, it is usually impossible to manually lift the web. The paper feed mechanism and the paper transport mechanism of the electronic printing apparatus are designed on the assumption that the size of the take-up paper is as small as possible.

[0004] On the other hand, the application range is gradually expanding as a new form of printed matter making device that makes use of the features of high speed and variable information printing of these electronic printing devices. For example, in the case of various notices and guides such as direct mail, it is not a bland notice simply consisting of the address and the business, but also various service information and announcements and various types of elements such as application forms Although the printed matter is enclosed, printing these notices, guides, application forms, etc. on separate sheets and enclosing them in a direct mail envelope is complicated and error-prone.

[0005] Therefore, notices, guides, application forms, etc.
A method has been put into practical use in which a sheet of paper is formed and cut lines are provided, each sheet is cut and put in an envelope, or one sheet of paper is folded and enclosed. Such forms of direct mail, notices, and the like are often issued in large quantities in a short period of time. For this reason, the above-described high-speed electronic printer is used to print addresses and notices. .

Another advantage of the electronic printing apparatus is that, based on image data created using a computer,
Since printing can be performed directly by an electronic printing device without creating a printing plate, and hundreds to thousands of copies of printed matter can be created in a short time, it is suitable for creating a pamphlet or a booklet.

[0007]

SUMMARY OF THE INVENTION The present invention provides a paper feeder for an electronic printing apparatus, which is particularly suitable for printing a large amount of printed material in a short time in order to meet the various needs as described above. Things.

That is, the paper supply mechanism of an existing electronic printing apparatus has a limitation on the amount of print paper that can be supplied. For example, the diameter of a take-up paper that can be set in the paper supply mechanism is small. Is limited to the ability for persons to be lifted alone. Therefore, when printing a large amount of printed matter in a short time, it is necessary to replace the paper in an existing electronic printing device, and therefore, the work load of replacing the paper is large, and the operation rate of the printing device is reduced. Further, there is a problem that a large amount of paper is lost due to paper replacement.

Therefore, various methods have been tried for supplying a large-diameter long take-up sheet. For example, a large-diameter take-up sheet was mounted on an electronic printing apparatus. It is designed for taking paper, so that the driving torque is insufficient, the running of the paper becomes unstable, and the registration stability of printing deteriorates. In addition, since the large-diameter winding paper is heavy, mounting it requires large-scale equipment such as a crane and a lifter, which is not suitable for an office environment in which an electronic printing apparatus is installed. Further, in order to handle a large-diameter roll-up paper, a significant modification of the electronic printing apparatus was required.

An object of the present invention is to supply a large-diameter winding paper in order to reduce the load of the winding paper exchange work, improve the operation rate of the printing apparatus, and reduce the paper loss. It is to provide a possible take-up and feeding device. Also,
An object of the present invention is to provide a simple paper feeder that can handle a large-diameter winding paper in an environment where an electronic printing apparatus is installed near an office. Another object of the present invention is to provide a paper feeding device capable of supplying a large-diameter winding sheet without any modification of the electronic printing apparatus.

[0011]

SUMMARY OF THE INVENTION A take-up / feeding device according to the present invention is a feeder for supplying a large-diameter take-up sheet to an existing electronic printing apparatus for printing. At the place, using a machine such as a crane or a lifter, the take-up sheet is mounted on a paper carriage, and the paper carriage is connected to a paper feeder attached to an electronic printing apparatus, and the carriage is fed by a paper feed roller of the paper feeder. The above problem has been solved by adopting a configuration in which the take-up paper is drawn out and supplied to the electronic printing apparatus. Hereinafter, the details of the take-up sheet feeding device of the present invention will be described.

According to a first aspect of the present invention, there is provided a sheet holding table having a brake means for rotatably supporting a wound sheet and controlling feeding of the sheet, and A paper carriage composed of a carriage having wheels that movably support the holding table, a paper feed roller that pulls out paper from a take-up paper wound around the paper carriage, and a paper feed roller, The paper feeder includes a tension unit that applies a constant tension to a sheet pulled out by a sheet transport mechanism provided in the electronic printing apparatus.

[0013] Further, the take-up paper feeder of the present invention is characterized in claim 2.
As shown in (1), a paper carriage on which a take-up sheet is mounted is separated from a paper feeder provided with a paper feed roller for drawing out the paper.

Further, the take-up paper feeder of the present invention is characterized in that
As shown in the figure, the paper transport speed of the paper feed roller that pulls out the paper from the paper carriage is higher than the paper transport speed of the electronic printing apparatus, and the paper transport speed corresponding to the slack amount of the take-up paper pulled out by the paper feed roller is A paper feed control unit for controlling the paper feed speed of the paper feed roller is provided.

Further, the take-up sheet feeding device of the present invention includes a slack detecting means for detecting a slack amount of the sheet, and rotates the sheet feeding roller based on a signal from the slack detecting means. Paper feed control means for controlling the speed and varying the paper conveyance speed is provided.

Further, in the winding sheet feeding device according to the present invention, the sheet feeding roller of the sheet feeding device is constituted by two sets of nip rollers, and the two sets of nip rollers are used to feed the sheet. The second nip roller disposed downstream of the first nip roller includes a paper feed roller having a slightly larger circumferential diameter than the first nip roller on the upstream side.

Further, the take-up paper feeder of the present invention is provided with a take-up paper slit device between the first nip roller and the second nip roller.

[0018]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a take-up / feeding device according to the present invention. FIG.
FIG. 1 is a side view of an apparatus showing a state in which a take-up sheet feeding device according to an embodiment of the present invention is combined with an electronic printing apparatus to supply a large-diameter take-up sheet to the electronic printing apparatus. In the drawing, reference numeral 10 denotes a paper carriage on which a large-diameter take-up paper 11 is mounted, and a shaft 61 that is passed through a core paper tube of the take-up paper is supported by a bearing mechanism 60 provided on the paper holding base 12, and is wound. The take sheet 11 is rotatably supported. Further, the paper holding table 12 is fixed to a moving carriage 14 provided with wheels 13, and the paper carriage 10 is configured to be able to load and move a take-up sheet.

The bearing mechanism 60 of the paper holding table 12 will be described in more detail with reference to the drawings. FIG. 5 is an enlarged view for explaining in more detail the bearing mechanism 60 provided on the paper holding table 12 for supporting the take-up paper 11 on a shaft. In the figure, reference numeral 61 denotes a shaft passed through the core paper tube of the take-up paper 11. Both ends of the shaft 61 are supported by a rotatable bearing roller 63 fixed to the paper holding table 12, and one end of the shaft 61 is used to pull out the wrapping paper 11 when hunting or meandering the paper. Alternatively, a brake means for preventing overrun of the sheet when the apparatus is stopped is provided.

The brake means is suitably pressed by pressing a brake shoe 64 made of a resilient and durable material, such as leather, against a brake drum 62 fixed to the shaft 61. Giving a great braking force. The brake shoe 64 is attached to a vertically movable bracket 65.
5 is fixed to the sheet holding table 12 via a slide shaft 66 and a slide bearing 67. The bracket 65 presses the brake shoe 64 against the brake drum 62 via a coil spring 68 and a screw 69. By adjusting the screw 69, the pressing pressure can be varied so that an appropriate braking force can be obtained. It has become.

In FIG. 1, reference numeral 20 denotes a paper feeder for supplying the rolled paper 11 mounted on the paper carriage 10 to an existing electronic printing apparatus 40. The take-up paper 11 is wound, and the paper feed roller 22 is driven and rotated by the driving force of a motor or the like to thereby take up the take-up paper 1.
1 is pulled out of the paper carriage 10 and the pulled out paper 1
1 is configured to be pulled out of the paper feeding device 20 by an existing paper transport mechanism 41 provided in the electronic printing device 40.

The paper feed roller 2 provided in the paper feed device 20
The paper transport speed 2 operates at a higher speed than the paper transport speed of the electronic printing device 40, and the paper roll 11 is pulled out of the paper carriage 10 by always forming a pool of rolled paper in the paper feeder 20. Is not directly applied to the paper transport mechanism 41 of the electronic printing device 40.

Further, the sheet feeding device 20 is provided with a slack detecting means 27 for the sheet, and the rotation of the sheet feeding roller 22 is controlled based on a signal from the slack detecting means 27, and The amount of accumulated paper is controlled within a certain range.
Further, in the present embodiment, the electronic printing device 4
Paper feed device 20 so that the supply of paper to
Is provided with a tension means 28 for applying a constant tension to the paper at the paper outlet.

FIG. 2 is a sectional view of the paper feeding device 20 of the present invention, showing a more detailed configuration of the paper feeding device 20. As shown in FIG.
In the drawing, reference numerals 22a and 22b denote paper feed rollers for pulling out the take-up paper 11 mounted on the paper carriage 10, and in this embodiment, 22a is referred to as a first nip roller, and 22b is referred to as a second nip roller. The two sets of paper feed rollers are driven by a motor (not shown) provided on the gantry 21, and nip rollers 22 a and 22 b sandwich the paper so as to pull out the take-up paper 11 from the paper carriage 10.

As shown in the figure, two sets of paper feed rollers, each comprising a first nip roller 22a and a second nip roller 22b, provided on the paper inlet side of the paper feed device 20, are each driven by a motor. It is composed of a driving roller and a movable roller that presses against the driving roller to pinch the take-up paper, and the movable roller is supported by a manually operated mounting lever, and the movable roller is driven by detaching and mounting the mounting lever. It can contact and separate from the roller. Further, each of the movable rollers constituting the first nip roller 22a and the second nip roller 22b is operated by a mechanism (not shown).
The pressure in contact with the drive roller can be adjusted according to the thickness of the winding paper to be used.

The first nip roller 22a and the second nip roller 22a
Two sets of paper feed rollers 22 composed of nip rollers 22b
Means that the driving roller of the second nip roller 22b disposed on the downstream side of the sheet flow is the first nip roller 22b on the upstream side.
a is slightly larger in circumference than the drive roller of
A constant tension is applied to the take-up paper 11 due to a difference in the paper conveyance speed caused by a difference in the circumferential diameter of the two sets of paper supply rollers, thereby preventing the paper from meandering in the paper supply device 20. Paper can be stably conveyed.

The frame 2 on the paper inlet side of the paper feeding device 20
1, a paper slitter 23, a guide roller 24, and a paper dust removal roller 25 are sequentially arranged between a first nip roller 22a and a second nip roller 22b of the two sets of paper feed rollers 22. Tension means 2 on base
8 is provided. Further, a paper guide 26 is provided on each of the paper exit side of the second nip roller 22b and the paper entrance side of the tension means 28, and forms a pool space for the rolled-up paper pulled out by the two sets of paper feed rollers. I have.

Although not shown, the left and right ends of the paper guide 26 on the paper exit side provided with the tension means 28 are used to adjust the left and right positions of the paper when the paper is supplied to the electronic printing apparatus 40. A paper guide is provided separately.

The paper slitter 23 has one or two sets of a driving roller driven by a motor, and a rotary blade that presses against the driving roller and slits the wound paper wound around the driving roller. It is constituted by a set of rotary blade devices, and slits one end of the take-up paper or both ends of the take-up paper so as to have a predetermined width. Further, a paper dust removing roller 25 commonly called “Betalon” is provided downstream of the paper slitter 23, and removes paper dust generated at a cut end of the wound paper by a rotating blade of the paper slitter 23.

Further, a guide roller 24 composed of two rotating rollers is disposed between the paper slitter 23 and the paper dust removing roller 25, and is wound by the paper slitter 23 and the paper dust removing roller 25. This is provided so as to prevent the winding paper 11 from meandering in the paper feeding device 20 due to uneven tension or frictional force generated in the paper feeding device 20.

On the other hand, the tension means 28 provided on the frame on the paper exit side of the paper feeding device 20 is used for the take-up paper 11 pulled out by the paper transport mechanism 41 of the electronic printing device 40.
Then, a constant tension is applied to prevent the winding paper from meandering in the electronic printing apparatus 40. Tension means 2 of the present embodiment
In No. 8, the idler roller and a weight device that presses against the idler roller are constituted, and the winding paper wound around the idler roller is pressed by the weight of the weight hung on the shaft arm, and the tension is exerted by rubbing the winding paper. It has gained. The weight paper friction surface is desirably covered with a soft fiber material such as felt to prevent the paper from being damaged.

As another method of the tension means for applying a constant tension to the take-up paper 11, an aperture bar mechanism 50 shown in FIG. 5 can be used. The aperture bar mechanism 50 includes a shaft 51 and a roller 52. The shaft 51 is fixed to the gantry 21.
The bracket 53 is supported at both ends by a bracket 53, and the bracket 53 is supported by the shaft 51 so that the rotation angle can be adjusted.

By passing the take-up paper 11 in an S-shape between the shaft 51 and the roller 52 having the above structure, and changing the rotation angle of the bracket 53 supporting the roller 52, the shaft 51 is The angle at which the winding sheet 11 is wound around the roller 52 changes, and the tension applied to the winding sheet 11 can be adjusted. Further, a nip roller may be provided on the shaft 51 of the aperture bar mechanism 50 in the same manner as the paper feed roller 22.

As shown in FIG. 2, PD1 to PD4 are provided in the storage space of the winding paper in the paper feeding device 20 of the present embodiment.
A plurality of paper slack detecting means 27 are provided. The four slack detecting means 27 of PD1 to PD4
Are photoelectric sensors composed of a light emitter and a light receiver, respectively. The light of the light emitter is blocked by the take-up paper 11 hanging down in the accumulation space, and the amount of accumulated paper is detected based on which position of the photoelectric sensor is blocked. can do.

Further, the first nip roller 22a, the second nip roller 22b, and the
The nip rollers 22a and 22b and the limit switches LS1, LS2 and LS3 for detecting that the tension unit 28 is in the sheet conveyance state are mounted on the tension unit 28 and the erroneous operation of the paper feeding device, respectively. It is provided so as to be in contact with the tip of the lever.

Further, limit switches LS4 and LS5 for detecting the remaining amount of the take-up paper 11 mounted on the paper carriage 10 are provided at the paper entrance side of the gantry 21. It is provided at a position separated by a certain distance from the. The paper carriage 1 is controlled by the limit switch LS4 or LS5 provided at the paper entrance of the paper feeding device 20.
It is detected that the remaining amount of paper has decreased by detecting that the winding diameter has decreased as the remaining amount of the take-up paper of 0 has decreased and the paper withdrawal angle has become equal to or less than a predetermined value. be able to.

In the present embodiment, the paper feeding path of the paper feeding device 20 is the first paper passing from the first nip roller 22a, through the paper slitter 23, the guide roller 24, the paper dust removing roller 25, and the second nip roller 22b. Without passing through the path, the paper slitter 23 and the paper dust removing roller 25,
Since the second nip roller may use the second path for directly drawing out the take-up sheet 11 of the sheet carrier 10, the limit switches for detecting the remaining amount of sheets are provided at two places.

That is, when the paper width of the take-up paper 11 is supplied to the electronic printing apparatus 40 without being slit, the take-up paper 11 can be directly pulled out by the second nip roller 22b. The remaining amount of the web 11 is detected by the limit switch LS5. Of course, even when the paper slitter 23 is not used, the paper may be wound so that the take-up paper 12 is pulled out via the first nip roller 22a.

Next, the limit switches LS1 to LS
5, and a paper feed control unit that controls the operation of the paper feed device 20 using the photoelectric switches PD1 to PD4 will be described.
FIG. 3 is a block diagram of the sheet feeding control means 30 for controlling sheet conveyance in the sheet feeding device 20.

As shown in FIG.
The paper feed control means 30 in the operation switch 31 (SW
1 to SW4), photoelectric switch 32 (PD1 to PD4),
Control switches such as limit switches 33 (LS1 to LS5); a motor 37 for driving the paper feed roller 22 and a driving roller for the paper slit 23; a motor control device 36 for controlling the number of rotations of the motor 37; Device 20
Indicator light 38 for displaying the operation state of the paper and the state of the paper, a buzzer 39 for alarm, the motor control device 36 and the motor 3
7, a control circuit 34 for controlling the operation of the indicator lamp 38, the buzzer 39, and the like, and a power supply 35 for supplying power to these.

In the paper feed control means 30 having the above configuration, the operation switches 31 for controlling the operation of the paper feed device 20 include, for example, a power on / off switch SW1, a motor control on / off switch SW2, and a control on / off switch SW2. A single-acting switch SW3 for driving the motor 37 when the off switch SW2 is in the "off" state, and a buzzer 39 when the control is "on".
And a buzzer stop switch SW4 or the like for stopping the sound of the buzzer. The control ON / OFF switch SW2 is
It is provided for automatically operating the sheet feeding device 20 in the “ON” state and for manually operating the sheet feeding device 20 in the “OFF” state.

In the sheet feeding control means 30 of this embodiment, first,
Prior to turning on the power, the control on / off switch SW2 is turned off so that the motor 37 does not operate, and the power switch SW1 is turned on. When the control ON / OFF switch SW2 is “OFF”, the motor 37 is pressed by pressing the single-action switch SW3 regardless of the operation state of the photoelectric switches 32 (PD1 to PD4) and the limit switches 33 (LS1 to LS5). It can be rotated at a low speed, and is used when the winding paper 11 is manually wound around a paper feeding roller of the paper feeding device 20 to prepare for paper feeding. In this state, the indicator light 3
8 illuminates in yellow, for example, to indicate that the sheet feeding device 20 is in the ready state.

The take-up paper 11 is pulled out from the paper carriage 10 and wound around the paper feeder 20.
When the paper has been threaded to within 0, the setting levers for detecting the positions of the mounting levers are set by setting the mounting levers of the paper feed roller 22 and the tension means 28.
3, limit switches LS4, LS5 for detecting the remaining amount of paper
Are turned on, and the motor 37 for driving the paper feed roller 22 can be controlled by the photoelectric switches PD1 to PD4. At the same time, the indicator light 38 lights up in green, indicating that the automatic operation of the sheet feeding device 20 is enabled.

When the control ON / OFF switch SW2 is turned ON in this state, the slack of the sheet is detected by the photoelectric switches PD1 to PD4, and the rotation of the motor 37 for driving the sheet feeding roller 22 is determined according to the state of the sheet accumulation. The number can be controlled automatically. If any of the limit switches, including the limit switches LS4 and LS5 for detecting the remaining amount of paper, is "OFF", the indicator lamp remains yellow and automatic operation cannot be performed. Show,
When the control ON / OFF switch SW2 is turned “ON” in this state, the alarm buzzer 39 may sound.

In the sheet feeding device 20 of this embodiment, PD1 to PD
The motor can be controlled at two rotation speeds by the photoelectric switch of D4. For example, when only PD1 detects the accumulation of paper, the motor 37 is rotated at high speed to pull out the winding paper 11, and the PD1 and PD2 are connected to each other. When both detect paper, the motor 37 rotates at low speed.

Further, when all the photoelectric switches PD1 to PD4 detect the paper, the motor 37 is stopped, and
The draw-out of the take-up paper 11 is stopped. When the electronic printing apparatus 40 is activated, the take-up sheet 11 in the sheet storage space is pulled out,
When the PD 3 and PD 4 cannot detect the accumulation of sheets, the motor 37 is rotated at a low speed to supply the wound sheet.

On the other hand, all the photoelectric switches 32 (PD1 to PD1)
When the PD 4) fails to detect the accumulation of sheets, the motor 37 is rotated at a high speed, the alarm buzzer 39 is sounded, the indicator light 38 is turned on in red, and the sheet feeding device 20 is turned on.
Informs the operator that the paper has run out.

When the remaining amount of the take-up paper 11 of the paper carriage 10 has fallen below a certain limit, the limit switch LS
4 or LS5 operates, and the control circuit 34 lights the indicator lamp 38 in yellow to notify the operator that the remaining amount of paper is low. That is, the color of the indicator light 38 allows the user to know the remaining amount of paper in the take-up paper feeder, and if the paper has run out for any reason, the alarm buzzer 39 and the red The indicator lamp 38 can notify the operator of a paper feeding abnormality.

The control circuit 34 of the above-described paper feed control means 30
May be configured by combining an electromagnetic relay or a logic circuit by combining an integrated circuit.

Next, a method for supplying paper to the electronic printing apparatus 40 using the take-up paper feeder of the present invention and printing on the take-up paper will be described. First, in the take-up / feeding device of the present invention, a take-up sheet 11 having a support shaft fixed to a core paper tube is mounted on a sheet holding table 12 of a sheet cart 10 and an electronic printing apparatus 40 is mounted.
The paper carriage 10 loaded with the winding paper 11 is connected to a paper supply device 20 installed in front of the paper supply unit.

Next, while pulling out one end of the take-up sheet 11, the sheet is first passed through the first nip roller 22a, and the position of the rotary blade of the sheet slitter 23 is adjusted right and left so as to have a predetermined sheet width. After checking the slit paper width, the paper is wound along the guide roller 24, the paper dust removing roller 25, the second nip roller 22b, the paper guide 26, and the tension means 28.

The slit chips at both ends of the take-up sheet slit by the sheet slitter 23 of the sheet feeding device 20 are discharged from the sheet feeding device 20 through a blower duct to a sheet dust collecting station provided outside the room. Further, since the paper dust is generated at the cut edge of the paper cut by the rotary blade of the paper slitter 23 as described above, the paper dust adheres to the paper by the paper dust removing roller 25 provided downstream of the paper slitter 23. Remove paper dust.

The take-up sheet 1 wound around the sheet feeding device 20
1 further passes the paper along the paper transport path in the electronic printing device 40 and through the paper discharge unit (not shown) that discharges the printed take-up paper. Next, in the sheet storage space of the sheet feeding device 20, the take-up sheet is given an appropriate slack, and the left and right positions of the sheet are adjusted by operating the sheet guide 26, and then the movable roller of the sheet feeding roller 22 is driven. The sheet is brought into contact with the roller, and the weight of the tension means 28 is pressed against the sheet to complete the preparation for feeding the take-up sheet 11.

At this time, when the limit switches LS1 to LS3 are pressed by the mounting lever of the movable roller or the weight mounting lever of the tension means, a switch signal is transmitted to the control circuit 34, and the drive of the motor 37 can be controlled. become. Further, from the paper carriage 10 to the paper cutting unit of the electronic printing device 40 through the paper feeding device 20,
When the paper threading is confirmed, the operation switch SW2 is operated to start the automatic operation of the paper feeding device 20.

The paper feeder 20 that has entered the automatic operation is provided with four sets of photoelectric switches (PD1 to PD) provided in the paper pool space.
D4) detects the slack of the take-up sheet 11, and the control circuit 34 controls the number of rotations of the motor 37 via the motor control device 36 according to the state of the photoelectric switches (PD1 to PD4). The take-up paper 11 is pulled out from the paper feed carriage 10 by driving the paper feed carriage 10.

Immediately after the paper feeding device 20 starts the automatic operation,
Since the electronic printing apparatus 40 is stopped, the take-up sheet 11 is not pulled out of the sheet storage space of the sheet feeding apparatus 20 and the sheet is pulled out until the four sets of photoelectric switches are all in the light-blocked state. Then, the motor 37 for driving the paper feed roller 22 stops, and the apparatus enters a standby state. In this state, the indicator lamp 38 is lit in green to notify the operator that the electronic printing apparatus 40 can be started.

Next, the electronic printing device 40 is activated to start printing on the web 11. At this time, the electronic printing device 40
The paper transport mechanism 41 starts to pull out the take-up paper 11 hanging down in the paper storage space of the paper feeding device 20. At the same time, the photoelectric switches (PD1 to PD4) of the sheet feeding device 20
By detecting the accumulated amount of the drawn-out paper,
While controlling the number of rotations of the motor 37, the winding paper 11 is started to be pulled out from the paper feeding cart 10.

That is, in the take-up paper feeder of the present invention, the paper feed roller 22 of the paper feeder 20 is driven by the motor 37 at a speed following the printing speed of the electronic printing device 40.
The take-up paper 11 is pulled out from the paper carriage 10. As described above, the control of the paper transport speed is performed by the stepwise light blocking of the light receivers of the four sets of photoelectric switches (PD1 to PD4) by the paper hanging down in the paper storage space. Motor 37 for driving
Is controlled at three stages of rotation speed including stop, so that the take-up paper 11 of the paper carriage 10 is smoothly pulled out,
It can be supplied to the electronic printing device 40.

By the way, when the printing speed of the electronic printing device 40 is 7.35 m / min, the paper feeding speed of the paper feeding device 20 is 11 m / min at high speed and 9 m / min at low speed, so that printing is performed stably. And the least paper, meandering, and jams occurred.

Next, when the printing by the electronic printing device 40 is stopped, the operation of the electronic printing device 40 is simply stopped, and the winding and feeding device itself is automatically operated without any operation. Supply can be stopped. That is, when the paper transport mechanism 41 of the electronic printing device 40 stops pulling out the take-up paper 11 from the paper storage space of the paper supply device 20, all the photoelectric devices provided in the paper storage space are provided. Until the switch is turned off, the take-up sheet 11 of the sheet carriage 10 is pulled out, the motor 37 for driving the sheet feed roller 22 is stopped, and the sheet feeder 20 automatically enters a standby state.

Further, when the take-up paper 11 is replaced,
In the standby state, the take-up paper 11 pulled out of the paper cart 10 is cut, and the paper cart 10 is fed to the sheet feeding device 2.
After separation from zero, the take-up paper previously mounted on another paper carriage is moved together with the paper carriage and connected to the paper feeding device 20. Next, the new winding sheet and the remaining sheet of the cut old winding sheet on the sheet feeding device side are connected with an adhesive tape or the like. In this state, when the paper is conveyed by the electronic printing device 40, a new take-up sheet is supplied to the paper feeding device 20 and the electronic printing device 40, and is automatically sent to a paper discharge unit provided in the electronic printing device 40. It will be threaded.

On the other hand, when the remaining paper of the take-up paper 11 decreases below a certain limit during printing by the electronic printing device 40, the remaining paper detection limit switch LS provided in the paper feeding device 20 is provided.
4 or LS5 is operated, and the indicator light 38 is lit yellow to give the operator a near-end alarm. Further, in the above-mentioned state, when the slack of the take-up sheet 11 has disappeared in the sheet storage space of the sheet feeding device 20, the indicator lamp 38 is lit in red, the alarm buzzer 39 is sounded, and the sheet feeding roller 2 is turned off.
2 is rotated at a high speed. In this state, the printing of the electronic printing device 40 is immediately interrupted, the motor control of the paper feeding device 20 is turned off, and the operation of all devices is stopped. Check and recover from the failure.

As described above in detail, the take-up / feeding device of the present invention includes an electrophotographic laser beam printer for forming a dot image using a laser beam as a light source, an ink jet printer having a large number of nozzles, and many more. This is a take-up and feeding device that can supply large-diameter take-up paper to various electronic printing devices, such as ion printers that form an image with an ink mist by using an application electrode for direct printing, direct mail, various notices, pamphlets and booklets Is a paper feeder suitable for producing a large number of documents in a short time.

In this embodiment, the sheet feeding device 20
Although a plurality of sets of photoelectric switches are used as a means for detecting the slack of the take-up sheet 11 in the above-described method, another method is to directly place the detection lever on the take-up sheet in the sheet storage space of the sheet feeding device, and to rotate the detection shaft The rotation number of the motor that drives the paper feed roller may be controlled by detecting the amount of slack of the take-up paper by the rotation angle detector provided in the printer. As another method of the slack detecting means, an optical or ultrasonic distance sensor for detecting the slack position of the sheet may be provided at the bottom of the sheet collecting space. When these rotation angle detectors and distance sensors are used, the number of rotations of the motor can be continuously controlled, and therefore, it is possible to supply the take-up paper 11 at substantially the same speed as the paper transport speed of the electronic printing apparatus. Can be.

[0065]

As described in detail above, the take-up paper feeder according to the present invention has a brake means for rotatably supporting a take-up paper and controlling the feed of the paper. And a paper carriage composed of a carriage having wheels for movably supporting the paper carriage, and a paper feed roller for pulling out paper from a take-up paper wound around the paper carriage. And a tension unit for applying a constant tension to a sheet fed from the sheet feed roller and pulled out by a sheet conveying mechanism provided in the electronic printing apparatus. Large-diameter roll paper can be supplied without any modification of the printing device and without interrupting the normal operation of the electronic printing device. Create large volumes of printed material It is possible.

Further, the take-up paper feeder according to the present invention is characterized in that:
As shown in the figure, the paper carriage on which the take-up paper is suspended is separated from the paper feeder provided with the paper feed roller for drawing out the paper. In addition, by preparing winding papers of different thicknesses and types on a plurality of paper carriages, it is easy to create printed matter of various papers. Further, the paper carriage can also be used as storage means for the rolled paper when printing is not performed.

Further, according to the present invention, there is provided a take-up / sheet feeding device.
As shown in the figure, the paper transport speed of the paper feed roller that pulls out the paper from the paper carriage is higher than the paper transport speed of the electronic printing apparatus, and the paper transport speed corresponding to the slack amount of the take-up paper pulled out by the paper feed roller is Since the paper feed control means for controlling the paper transport speed of the paper feed roller is provided, without applying any excessive load to the transport mechanism of the electronic printing apparatus, and
Since it can operate in cooperation with the electronic printing apparatus, a large-diameter winding sheet can be easily supplied.

Further, in the winding sheet feeding apparatus of the present invention, the sheet feeding control means includes a slack detecting means for detecting the amount of accumulated paper, based on a signal from the slack detecting means. By controlling the rotation speed of the paper feed roller and varying the paper conveyance speed, the rolled paper can be supplied automatically following the printing speed of the electronic printing apparatus.

Further, according to the present invention, there is provided a take-up sheet feeding device.
As shown in FIG. 2, the paper feed roller of the paper feeder is composed of two sets of nip rollers, and the two sets of nip rollers are arranged such that a second nip roller disposed on the downstream side of the sheet flow is higher than a first nip roller on the upstream side. Since the peripheral diameter is slightly larger, a constant tension can be applied to the paper between the nip rollers, and the paper can be prevented from meandering in the paper feeding device, and the paper can be supplied stably.

Further, since the take-up sheet feeding device of the present invention is provided with a slit device for the take-up sheet between the first nip roller and the second nip roller, the sheet feeder is provided with a sheet feeder. Even when the width is changed, it is not necessary to replace the paper, and by slitting the wound paper to a required width, printed matter of various dimensions can be created.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a take-up sheet feeding device.

FIG. 2 is a cross-sectional view of a sheet feeding device.

FIG. 3 is a control circuit block diagram of the sheet feeding device.

FIG. 4 is a side view showing another embodiment of the tension means.

FIG. 5 is an enlarged view showing a bearing mechanism of the paper carriage.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 paper carriage 11 take-up paper 12 paper holder 14 carriage 20 paper feeder 21 gantry 22 paper feed roller 22 a first nip puller 22 b second nip roller 23 paper slitter 27 slack detection means 28 tension means 30 paper feed control means 36 motor control Apparatus 37 Motor 40 Electronic printing device 41 Paper transport mechanism 60 Bearing mechanism 62 Brake drum 64 Brake shoe

Claims (6)

[Claims] 1. A paper holding table provided with a brake means for rotatably supporting a take-up paper and controlling the feeding of the paper;
A paper carriage composed of a carriage provided with wheels for movably supporting the paper holding table, a paper supply roller for drawing out paper from a take-up paper wound around the paper carriage, and a paper supply roller fed from the paper supply roller. A sheet feeding device including a tension unit for applying a constant tension to a sheet drawn by a sheet conveying mechanism provided in the electronic printing apparatus. 2. The take-up device according to claim 1, wherein a sheet carrier on which the take-up sheet is mounted is detachable from a sheet feeder provided with a sheet feed roller for drawing out the sheet. Paper feeder 3. The paper feed speed of a paper feed roller that pulls out a paper from a paper carriage is higher than the paper feed speed of an electronic printing device, and the paper feed speed corresponding to the slack amount of the take-up paper pulled out by the paper feed roller. 2. The take-up sheet feeding device according to claim 1, further comprising a sheet feeding control unit that controls a sheet feeding speed of the sheet feeding roller. 4. The paper feed control means includes a slack detection means for detecting a slack amount of paper, and controls a rotation speed of a paper feed roller based on a signal from the slack detection means to change a paper conveyance speed. The take-up sheet feeding device according to claim 3, wherein 5. The paper feed roller of the paper feed device is composed of two sets of nip rollers, wherein the two sets of nip rollers are a second nip roller disposed downstream of a sheet flow and a first nip roller upstream. 2. The take-up sheet feeding device according to claim 1, wherein a peripheral diameter is slightly larger than that of the sheet feeding device. 6. The take-up sheet feeding device according to claim 5, wherein a slit device for a take-up sheet is provided between the first nip roller and the second nip roller.