JP2654134B2 - Device for detecting the position of the paper feed roll of the printing press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an original sheet when a turret arm of a printing press is automatically supplied with a sheet supply roll (original sheet) around which printing paper before printing is wound. The present invention relates to a device for detecting a mounting position of a raw material, which detects a mounting position of a web.

[Conventional technology]

Conventionally, the supply of the above-mentioned web to the turret arm of the printing press generally uses the web transferred by a feed conveyor or the like,
It is done by pushing it by hand, placing it on a lifter that can move up and down, raising this lifter, and chucking it at the tip of the turret arm. Was also done manually.

[Problems to be solved by the invention]

However, supplying the web to the printing press with the above manual operation is extremely inefficient, and is a bottleneck in automation in the printing process. There has been a strong demand for a device capable of automatically detecting the attachment position of a raw material in order to generate an alarm or control reattachment.

SUMMARY OF THE INVENTION In view of the above, the present invention detects the mounting position of a web in which printing paper before printing is wrapped around a turret arm of a printing machine, detects the mounting failure, and issues an alarm or performs re-mounting. It is an object of the present invention to provide an apparatus for detecting a mounting position of a raw material that generates the control signal of (1).

[Means for solving the problem]

In order to achieve the above object, a mounting position detecting device of the present invention includes a position detecting sensor that detects at least two positions on a peripheral surface of a raw material parallel to a central axis of a normal mounting position of the raw material, A comparator for detecting a difference between the output signals of the sensor and generating an output signal corresponding to the difference; detecting a mounting defect in accordance with the output signal of the comparator and issuing an alarm or reattaching And a control unit that generates a control signal for performing the control.

[Action]

According to the present invention, a position detecting sensor is provided at two points parallel to the central axis of the regular mounting position of the raw material, and it is determined that the mounting position of the raw material is defective according to a difference between sensor output signals at each point. At the same time, it is possible to generate an alarm of mounting failure or generate a control signal for performing mounting again, thereby automatically performing mounting again.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 7.

 FIG. 1 is a diagram illustrating the principle of the present invention.

The attachment position detecting device 100 includes a first position sensor 101 for detecting a distance to a point a of the web 2, a second position sensor 102 for detecting a distance to a point b, a first position sensor 101 and a second position sensor 102. And a control unit for detecting a difference between output signals from the comparator and generating an output signal corresponding to the difference, and controlling an alarm signal or reattachment when the output signal of the comparison operator 103 is equal to or more than a predetermined value. And a control unit 104 for generating a signal.

The first position sensor 101 and the second position sensor 102 generate output signals corresponding to the distances to the points a and b of the raw material 2, respectively, and output the signals to the comparison calculator 103.

Upon receiving the output signals of the sensors, the comparison calculator 103 detects a difference between the output signals, generates an output signal corresponding to the difference, and outputs the output signal to the control unit 104.

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

Next, a description will be given of a case where the apparatus for detecting a mounting position of a web according to the present invention is used for an automatic web feeder of a printing press.

 FIG. 2 is a schematic view of an automatic sheet feeder.

The automatic web feeder M includes a rotatable turret arm 4 which is provided in front of the paper feed unit of the printing press 1 and has a cone chuck 3 protruding and holding a web 2 wound with printing paper before printing. Below the turret arm 4, a table lifter 5 that can move up and down is provided.
The delivery conveyors 6 are respectively arranged on the sides of the conveyor, and the delivery conveyors 6 are connected to two continuous feed conveyors 7 along the transport direction.

As shown in FIG. 3, the table lifter 5 is provided with an upper surface plate 9 having a lower central portion supported by a pivot 8 so as to be vertically swingable. The upper surface plate 9 has a hollow cross section. A roller with a built-in motor for rotating the roll 2 for holding the web 2 and adjusting the position of the double-sided tape adhered to the web 2 is formed in an upper opening of the upper plate 9 and bent in a substantially V shape.
Ten are arranged. Optical sensors 101 and 102 are provided at two places in the center in the width direction of the upper surface plate 9 which are separated in the length direction, as shown in FIG. The control unit 104 is connected.

Further, the table lifter 5 is provided with a cylinder 12 having a pivotally supported substantially central portion thereof. One end of the cylinder 12 is rotatably connected to a connecting member 13 fixed to the rod tip. The other end of the swing lever 14 and the other end of a connecting rod 15 whose one end is rotatably connected to the lower side of the upper plate 9 on the printing press side are rotatably connected.

As a result, the cylinder 12 is operated to
Is advanced, the swinging lever 14 and the connecting rod 15 become linear, and the upper surface plate 9 swings in the direction of the delivery conveyor 6, so that the upper surface of the upper surface plate 9 on the delivery conveyor 6 side is raised. When the cylinder 12 is in the horizontal state, the cylinder 12 is
Is retracted, the swinging lever 14 and the connecting rod 15 are bent relative to each other, and the top plate 9 is configured to have a V-shaped cross section.

As shown in detail in FIGS. 2 and 4, the delivery conveyor 6 and each of the feed conveyors 7 extend in a direction perpendicular to the transport direction of the raw fabric 2 and are positioned so as to form a V-shape with each other. Rollers 16 with built-in motors for reversing the original fabric are provided at predetermined intervals.
And two pairs of left and right rotatable raw material holding rollers 17 extending in the transport direction of the raw material 2 are arranged to be vertically movable.

In this manner, the web 2 is normally moved forward and backward by the rollers 16 with built-in motors for back and forth movement of the web, and with this rotation, the web is moved from the feed conveyor 7 at the end to the feed conveyor 7 at the center and further to the transfer conveyor. 6, and when the material holding roller 17 is lifted, the material 2 is rotatably held by the material holding roller 17 above the transfer conveyor 6 and each of the feed conveyors 7. The second glue position 2a can be adjusted.

Further, as shown in FIG. 5, the transfer conveyor 6 is provided with a raw material holding roller 17 which can move up and down via a lifting cylinder 18 to the left and right in the width direction along the transport direction of the raw material 2. The roller 17 is connected to an ascending cylinder 18. When the roller 17 rises through the ascending cylinder 18, the roller 17 rotatably holds the web 2. The transfer conveyor 7 is held so as to be able to be transported, and the transfer conveyor 7 is tilted in the direction of the table lifter 5 by ascending to the side opposite to the table lifter 5 of the transfer conveyor 6. An inclination cylinder 20 is provided.

As a result, the holding roller 17 is
Is raised, and the delivery conveyor 6 is tilted in the direction of the table lifter 5 by operating the tilting cylinder 20 in a state where the web 2 is held by the holding rollers 17, so that the table lifter 5 side of the delivery conveyor 6 is moved. The delivery is performed by rolling the web 2 on the holding conveyor 17 toward the table lifter 5 side.

Further, as shown in FIGS. 4 and 6, the transport end of each of the feed conveyors 7 is provided with a switch PS ₁ for detecting a raw material position.
But also conveying end of the delivery conveyor 6, along with the original switches PS ₂ for anti position detection are provided respectively on the upper surface of the table lifter 5, to detect the presence of raw 2 to this upper surface A switch PS ₃ and a glue position setting assisting switch PS ₄ (FIG. 6) are further provided on this side, a limit switch LS ₁ for detecting that the table lifter 5 is at the upper limit from above, and an intermediate position of the table lifter 5. limit switch LS ₂ and the table lifter 7 for detecting the the limit switch LS ₃ to detect that it is in the lower limit are arranged respectively a.

In addition, the pallet 21 can also be arrange | positioned at the side of the delivery conveyor 6 and the sending conveyor 7. FIG.

The raw material 2 placed on the feed conveyor 7 is rotatably held by the raised raw material holding roller 17, and after adjusting the position of the gluing position 2a (FIG. 2), the raw material 2 is adjusted. Holding roller
17 to lower the web 2
, And with this rotation, the next feed conveyor 7
Then, the raw material 2 is sequentially conveyed to the delivery conveyor 6 in the same manner.

Then, the holding roller 17 is raised via the raising cylinder 18 of the delivery conveyor 6, and the delivery cylinder 6 is operated by operating the tilting cylinder 20 while the raw material 2 is held by the holding roller 17, thereby moving the delivery conveyor 6 to the table lifter 5. To make the table lifter 5 side of the delivery conveyor 6 substantially horizontal. On the other hand, by operating the cylinder 12 of the table lifter 5 to advance the connecting member 13, the upper surface plate 9 is swung in the direction of the delivery conveyor 6, and the upper surface of the upper surface plate 9 on the delivery conveyor 6 side is horizontal. State.

Thus, the web 2 held by the holding rollers 17 of the transfer conveyor 6 is rolled in the direction of the table conveyor 5 to perform the transfer, and the inclined portion of the upper surface plate 9 on the opposite side of the transfer conveyor 6 of the table conveyor 5. This can be stopped.

Then, the tilting cylinder 20 is reversely operated to release the inclination of the delivery conveyor 6, and the raising cylinder 18 is reversely operated to lower the holding roller 17. On the other hand, the cylinder 12 of the table lifter 5 is also operated in the reverse
13 rolled back, the web 2 passed here
Is rotatably held by a roller 10 with a built-in motor, and after detecting the gluing position 2a, the table lifter 5 is raised and chucked by the turret arm 4, whereby the raw fabric 2 is slid by the turret arm 4 of the printing press 1. It is automatically retained.

The optical sensors 101 and 102 are light emitting units as shown in FIG.
The measuring light 10 emitted from the light emitting portion, having the light receiving portion 106 and the light receiving portion 106
7 corresponds to the time required for the turret arm 4 to be reflected by the web 2 held and returned.
Generates an output signal corresponding to the distance to
Output to

The comparison operation unit 103 rotates the raw signal of the output signals of the two optical sensors 101 and 102 over the entire circumference of the raw material 2 and compares the output signal corresponding to the difference between the two output signals with the control unit 10.
Output to 4.

When the output signal of the comparator 103 is equal to or more than a predetermined value, the control unit 104 determines that the chuck of the turret arm 4 is defective, generates an alarm signal to notify the abnormality, and informs the user of the reattachment. Control signal to cause the automatic material feeder to reattach.

In this manner, when the web 2 conveyed from the feed conveyor 7 to the delivery conveyor 6 is automatically supplied from the table lifter 5 to the turret arm 4 of the printing press 1, the web is accurately transferred to the turret arm 4. Can be retained.

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

Further, a set of sensors may be further provided at a position perpendicular to the sensor mounting position, and the control may be performed by detecting the horizontal displacement even when the vertical displacement is not detected.

Further, one sensor may be moved in a direction parallel to the central axis of the raw material to detect at least two positions.

〔The invention's effect〕

The present invention relates to a paper feed roll mounting position detecting device for a printing press for detecting a paper feeding roll mounting position of a printing press,
A position detecting sensor for detecting at least two positions on the peripheral surface of the sheet feeding roll parallel to the central axis of the regular mounting position of the sheet feeding roll, and detecting a difference between output signals at each point of the sensor. A comparison arithmetic unit for generating an output signal corresponding to the difference, and a control for detecting a mounting defect according to the output signal of the comparison arithmetic unit, generating an alarm, or generating a control signal for causing re-attachment Since the feed roll before printing is automatically supplied from the delivery conveyor to the turret arm of the printing press via the table lifter, it can be controlled to be automatically attached to a correct state, As a result, there is an effect that the paper feed roll can be automatically and efficiently supplied to the printing machine without any trouble.

[Brief description of the drawings]

FIG. 1 is a view for explaining the principle of the present invention, FIG. 2 is a schematic perspective view of an automatic sheet feeder, FIG. 3 is a schematic view of a table lifter, FIG. FIG. 5 is an enlarged side view of the transfer conveyor, FIG. 6 is a side view of the automatic sheet feeder, and FIG. 7 is an explanatory view of a position sensor. 2 ... raw sheet, 4 ... turret arm, 5 ... table lifter, 6 ... delivery conveyor, 7 ... feed conveyor,
9 Top plate, 10 Rollers with built-in motor, 12, 18, 20
Cylinder, 14… swing lever, 15… connecting rod, 16… roller with built-in motor for forward / backward movement, 17… raw material holding roller, 101…
... 1st position detection sensor, 102 ... 2nd position detection sensor, 1
03 Comparison arithmetic unit, 104 Control unit, 105 Projection unit, 10
6 ... Light receiving unit, 107 ... Measurement light.

Continuation of the front page (72) Inventor Yasushi Yamamoto 22-12, Kitanayoda, Seika-cho, Soraku-gun, Kyoto (56) References Shokai 61-83649 (JP, U)

Claims (1)

(57) [Claims] An apparatus for detecting the position of a paper feed roll of a printing press, which detects the position of the paper feed roll of the printing press, comprising: A position detection sensor for detecting the positions of at least two points, a comparison calculator for detecting a difference between output signals at each point of the sensor and generating an output signal corresponding to the difference, and an output of the comparison calculator. A control unit for detecting a mounting defect in response to a signal and issuing an alarm or generating a control signal for performing remounting.