JPH02132054A - Feed sheet roll mounting position detecting device for printer - Google Patents

Abstract

PURPOSE:To sound an alarm for poor mounting and to generate a control signal for remounting by a method wherein a poor mounting position is detected by means of a difference between output signals from sensors for detecting a position mounted in two spots positioned in parallel to the central axis in a mounting position of a raw sheet. CONSTITUTION:A mounting position detecting device 100 is provided with a first position sensor 101 for detecting a distance to a point (a) of a raw sheet 2 end a second position detecting sensor 102 to detect a distance to a point (b). A comparing computer 103 receiving output signals from the sensors 101 and 102 detects a difference therebetween to generate an output signal. A control part 104 outputs an alarm signal or a control signal for remounting when an output signal from the comparing computer 103 exceeds a given value. This constitution enables execution of automatic mounting of a feed sheet roll in an accurate state when a feed sheet roll before printing is fed to a turret arm 4 of a printer, and enables the high-efficient feed of the feed sheet roll to a printer.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention is directed to the production of raw paper when a paper feed roll (original paper) wrapped with printing paper before printing is automatically supplied to the turret arm of a printing machine. The present invention relates to an attachment position detection device for an original fabric that detects an attachment position of an original fabric.

[Conventional technology]

Conventionally, the above-mentioned raw fabric was fed to the turret arm of a printing press by manually pushing the raw fabric conveyed by a feed conveyor, placing it on a lid that could move up and down, and then raising the lifter. This was done by chucking it to the tip of the turret arm, and checking the attachment position and reattachment in the case of a defective attachment were also done manually.

[Problem to be solved by the invention]

However, feeding the original fabric to the printing machine with the above-mentioned manual labor is extremely inefficient and is a bottleneck for automation in the printing process. There is a strong desire for something that can automatically detect the attachment position of the original fabric in order to issue an alarm and control reattachment.

In view of the above, the present invention detects the mounting position of the original paper wrapped with unprinted printing paper around the turret arm of the printing machine, detects the installation failure, and issues an alarm or causes the reinstallation. An object of the present invention is to provide an apparatus for detecting the attachment position of an original fabric that generates a control signal.

[Means to solve the problem]

In order to achieve the above object, the attachment position detection device of the present invention includes a position detection sensor that detects the positions of at least two points on the circumferential surface of the original fabric parallel to the central axis of the regular attachment position of the original fabric; A comparator that detects a difference in the output signals of the sensor and generates an output signal corresponding to the difference; and a comparator that detects installation failure according to the output signal of the comparator and issues an alarm or reinstalls the sensor. The controller is configured to include a control section that generates a control signal for performing the following steps.

[Effect]

The present invention provides position detection sensors at two points parallel to the central axis of the normal attachment position of the original fabric, and determines that the attachment position of the original fabric is defective according to the difference in sensor output signals at each point. At the same time, it generates an alarm for improper installation or generates a control signal for reinstallation,
Reattachment can be done automatically.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 7.

FIG. 1 shows a diagram explaining the principle of the present invention.

The attachment position detection device 100 includes a first position sensor 10 that detects the distance to point a of the original fabric 2, a second position sensor 102 that detects the distance to point b, and a first position sensor 101.
and a comparator 103 that detects the difference between the output signals from the second position sensor 102 and generates an output signal corresponding to the difference, and a comparator 103 that outputs an alarm signal or and a control section 104 that generates a control signal for controlling reattachment.

The first position sensor 101 and the second position sensor 102 generate output signals corresponding to the distances to points a and b of the original fabric 2, respectively, and output them to the comparator 103.

Comparison calculator 103 receives the output signals from each sensor, detects a difference between the output signals, generates an output signal corresponding to the difference, and outputs it to control section 104 .

The control unit 104 outputs an alarm signal or a control signal for reinstallation when the output signal of the comparator 103 is greater than or equal to a predetermined value.

Next, a case will be described in which the original fabric attachment position detection device of the present invention is used in an automatic fabric feeder of a printing press.

FIG. 2 is a schematic diagram of the automatic paper feeder.

The automatic paper feeder M is provided upstream of the paper feed section of the printing machine 1, and has a rotatable turret arm 4 protruding from a cone chuck 3 that holds the paper 2 wrapped with printing paper before printing. A vertically movable table lifter 5 is disposed below the turret arm 4, and a delivery conveyor 6 is disposed on the side of the table lifter 5, and the delivery conveyor 6 is arranged along the conveyance direction. It is connected to two consecutive feed conveyors 7.

As shown in FIG. 3, the table lifter 5 is equipped with an upper plate 9 whose central portion is supported swingably in the vertical direction via a pivot 8, and this upper plate 9 is hollow and has a cross section. The top plate 9 is bent into a substantially V-shape, and inside the top opening of the top plate 9 is a rotating motorized roller 1 for holding the web 2 and adjusting the position of the double-sided tape affixed thereto.
o is arranged. As shown in FIG. 3, optical sensors 101 and 102 are provided at two locations spaced apart in the length direction at the center of the width direction of the top plate 9, and a comparator 103 and a comparator 103 are provided on their output sides. A control unit 104 is connected.

Furthermore, this table lifter 5 is equipped with a cylinder 12 that is swingably supported at its substantially central portion, and a connecting member 13 fixed to the tip of this rod has one end rotatably connected to the lower part of the table lifter 5. The other end of the swinging lever 14 and the other end of a connecting rod 15 whose one end is rotatably connected to the lower side of the printing machine side of the upper plate 9 are rotatably connected to each other.

This causes the cylinder 12 to operate and its connecting member 1 to
2 is moved forward, the swinging lever 14 and the link 5 become linear, and the top plate 9 swings in the direction of the delivery conveyor 6. When the upper surface is in a horizontal state and the cylinder 12 is operated in reverse to move its connecting member 13 backward, the swing lever 14 and the connecting rod 15 are in a mutually bent state, and the upper surface plate 9 has a V-shaped cross section. It is configured so that the

The delivery conveyor 6 and each sending conveyor 7 have a second
As shown in detail in FIG. 4 and FIG. 4, rollers 16 with built-in motors for forward and backward movement of the web extend in a direction perpendicular to the conveying direction of the web 2 and are positioned so as to form a V-shape with each other at predetermined intervals. and each motor built-in roller 1
6, two pairs of left and right rotatable web holding rollers 17 extending along the conveying direction of the web 2 are disposed so as to be vertically movable.

As a result, the original fabric 2 is normally moved forward and backward by the roller 16 with a built-in motor for advancing and retracting the original fabric, and with this rotation, the original fabric is transferred from the feed conveyor 7 at the end to the feed conveyor 7 in the center, and further to the delivery conveyor. 6, and when the original fabric holding roller 17 is raised, the transfer conveyor 6
Above each feed conveyor 7, the original fabric 2 is rotatably held by the original fabric holding rollers 17, so that the position of the glue application position 2a of the original fabric 2 can be adjusted.

Furthermore, as shown in FIG. 5, the delivery conveyor 6 includes a web holding roller 17 that is movable up and down in the widthwise direction along the transport direction of the web 2 via a lifting cylinder 18.
20 The roller 17 is connected to the lifting cylinder 18, and when the roller 17 rises via the lifting cylinder 18, it rotatably holds the web 2, and when it descends, the above-mentioned forward-backward motor A built-in roller 16 holds the original fabric 2 in a freely conveyable manner, and a delivery conveyor 6
A tilting cylinder 20 is provided on the side opposite to the table lifter 5. The tilting cylinder 20 tilts the delivery conveyor 7 toward the table lifter 5 by being raised.

As a result, the holding port-ra 1 is moved through the lifting cylinder 18.
7 is raised, and with the holding roller 17 holding the original document 2, the tilt cylinder 20 is operated to tilt the delivery conveyor 6 in the direction of the table lifter 5, thereby tilting the table lifter 5 side of the delivery conveyor 6. It is configured to be in a substantially horizontal state so that the original web 2 on the holding conveyor 17 is rolled toward the table lifter 5 side for this delivery.

Furthermore, as shown in FIGS. 4 and 6, a switch PS1 for detecting the position of the original fabric is installed at the conveying end of each of the above-mentioned feeding conveyors 7.
However, the transfer end of the delivery conveyor 6 is also provided with a switch PS2 for detecting the position of the original fabric, and a switch PS2 is provided on the top surface of the table lifter 5 for detecting the presence of the original fabric 2 on the top surface. PS3 and a switch PS4 (Fig. 6) for assisting in setting the glue position, and on this side, a limit switch LS for detecting from above that the table lifter 5 is at the upper limit, and a limit switch LS for detecting the intermediate position of the table lifter 5. limit switch LS2 and limit switch L that detects that the table lifter 7 is at the lower limit.
S3 are arranged respectively.

In addition, on the side of the delivery conveyor 6 and the sending conveyor 7,
Pallets 21 can also be arranged.

The original fabric 2 placed on the feed conveyor 7 is held rotatably by the raised fabric holding roller 7, and after adjusting the position of the glue application position 2a (Fig. 2), the original fabric is The holding roller 7 is lowered and the original fabric 2 is held by the roller 6 with a built-in forward/backward motor, and as it rotates, the original fabric 2 is sequentially transferred to the next feeding conveyor 7 and then to the delivery conveyor 6 in the same manner.
transport.

Then, the holding roller 7 is raised via the lifting cylinder 8 of this delivery conveyor 6, and this holding roller 7 is raised.
While holding the original fabric 2, the tilting cylinder 20 is operated to tilt the delivery conveyor 6 in the direction of the table lifter 5 so that the table lifter 5 side of the delivery conveyor 6 is in a substantially horizontal state. On the other hand, by operating the cylinder 12 of the table lifter 5 and advancing its connecting member 13, the top plate 9 is swung in the direction of the delivery conveyor 6, so that the upper surface of the top plate 9 on the delivery conveyor 6 side is horizontal. state.

As a result, the original web 2 held by the holding roller 17 of the delivery conveyor 6 is rolled in the direction of the table conveyor 5 and delivered, and at the same time, the slanted part of the top plate 9 of the table conveyor 5 on the opposite side of the delivery conveyor 6 This can be stopped.

Then, the tilting cylinder 20 is operated in reverse to release the tilt of the delivery conveyor 6, and the ascending cylinder 18
is operated in reverse to lower the holding roller 17. On the other hand, by reversely operating the cylinder 12 of the table lifter 5 and retracting this connecting member 13, the raw fabric 2 delivered here is held rotatably by the motorized roller 10.
After detecting this gluing position 2a, the table lifter 5 is raised and the turret arm 4 chucks the original fabric 2, thereby automatically holding the original fabric 2 in the turret arm 4 of the printing press 1.

The optical sensors 101 and 102 have a light projecting section 105 and a light receiving section 106, as shown in FIG. An output signal corresponding to the time it takes to return from the original fabric 2, that is, the distance from the original fabric 2, is generated and output to the comparator 103.

The comparison calculator 103 compares the output signals of the two optical sensors 101 and 102 over the entire circumference of the original web 2 by rotating the original web 2, and sends an output signal corresponding to the difference between the two output signals to the control unit 104. Output to.

If the output signal of the comparator 103 is equal to or higher than a predetermined value, the control unit 104 determines that the turret arm 4 is defective in chucking the original material, generates an alarm signal to notify of the abnormality, and prompts for reinstallation. A control signal is generated to cause the automatic material feeder to reattach.

In this way, from the feed conveyor 7 to the delivery conveyor 6
The original fabric 2 conveyed to the table lifter 5 is automatically
When the original fabric is supplied to the turret arm 4 of the printing press 1, the turret arm 4 can accurately hold the original fabric.

In the above embodiment, an optical sensor is used as a position detection sensor, but it is also possible to control using an ultrasonic sensor, a magnetic sensor, or the like.

Furthermore, a further set of sensors may be configured at a position perpendicular to the mounting position of the sensor, so that even if a vertical deviation is not detected, control is performed by detecting a horizontal deviation.

Furthermore, one sensor may be moved in a direction parallel to the central axis of the original fabric to detect the positions of at least two points.

〔Effect of the invention〕

The present invention provides a paper feed roll attachment position detection device for a printing press that detects the paper feed roll attachment position of a printing press, in which at least one of the A position detection sensor that detects the position of two points, a comparator that detects the difference between the output signals at each point of the sensor and generates an output signal corresponding to the difference, and an output signal of the comparator. The present invention also includes a control unit that detects installation failure and issues an alarm or generates a control signal for reinstallation. When the roll is automatically fed to the turret arm of the printing press, it can be controlled so that it is automatically installed in the correct position.This allows the feed roll to be automatically and efficiently fed to the printing press without any manual effort. It has the effect of being able to do so.

[Brief explanation of the drawing]

Fig. 1 is a diagram explaining the principle of the present invention, Fig. 2 is a schematic perspective view of the automatic paper feeder, Fig. 3 is a schematic diagram of the table lifter, and Fig. 4 is a top view of the automatic paper feeder. FIG. 5 is an enlarged side view of the delivery conveyor, FIG. 6 is a side view of the automatic sheet feeder, and FIG. 7 is an explanatory diagram of the position sensor. 2... Original fabric, 4... Turret arm, 5... Table lifter, 6... Delivery conveyor, 7... Feeding conveyor, 9... Top plate, 10... Roller with built-in motor, 12, 18.20... Cylinder, 14... Swinging lever 15... Linking rod, 16... Roller with built-in forward/backward motor, ] 7... Original fabric holding roller, 101... No. 1
Position detection sensor, 102...Second position detection sensor, 1
03... Comparison calculator, 104... Control unit, 105...
... Light projecting section, 106... Light receiving section, 107... Measuring light. Applicant's representative Yasushi Ishikawa

Claims (1)

[Scope of Claims] In a paper feed roll attachment position detection device for a printing press that detects the paper feed roll attachment position of a printing press, the peripheral surface of the paper feed roll parallel to the central axis of the regular attachment position of the paper feed roll. a position detection sensor that detects the positions of at least two points above; a comparison calculator that detects a difference between output signals at each point of the sensor and generates an output signal corresponding to the difference; 1. An attachment position detection device for a paper feed roll of a printing press, comprising a control section that detects attachment failure in accordance with an output signal and issues an alarm or generates a control signal for causing reattachment.