JP2005145677A - Transport device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conveying device capable of effectively adjusting a bend during conveying a sheet-like material to improve chopper folding accuracy and prevent scratches.
SOLUTION: A plurality of upper conveying belts 3, 4, 5 and a lower conveying belt 6 which are arranged along the width direction of the signature 2 and convey the signature 2, and the signature 2 conveyed by these conveying belts. In the transport device including the chopper device 1 for chopper folding, the transport belts 6a to 6c for transporting the left half of the signature 2 and the transport belts 6d to 6f for transporting the right half of the transport belt arranged in plural. And a motor 15 with a reference rotational speed encoder 15a for driving the left half conveyor belt, and a servo motor 17 for driving the right half conveyor belt, and the signature to be conveyed. Optical sensors 8 and 9 that detect the bending of 2 and a control device 20 that changes the speed of the right half conveyance belt with respect to the left half conveyance belt by the detection output of the optical sensor. Prepared.
[Selection] Figure 1

Description

  The present invention relates to a conveyance device provided in a folding machine or the like of a rotary printing press.

  A rotary printing machine is generally provided with a folding machine for folding a printed web. Such a folding machine is provided with a chopper device that further folds a folded signature by cutting the web. As shown in FIG. 8, this chopper device conveys the signature 101 with a plurality of pairs of conveyor belts 100a and 100b that run in pairs in the vertical direction, and contacts the signature 101 with a stopper (not shown). After stopping at the reference position, the chopper blade 102 is lowered, the central portion of the signature 101 is pushed down and pushed between the folding rollers 103, and the signature 101 is passed between the folding rollers 103 while being bent. Thus, the signature 101 is further folded by chopper folding.

  As shown in FIG. 9, the current conveyor belts 100a and 100b include upper and lower drive rollers 104a and 104b made of a series of single cylinders in the cylinder axis direction and a drive motor (not shown) via a gear train 105. All the conveyor belts 100a and 100b convey the signature 101 at the same speed. For this reason, the signature 101 conveyed while being bent has poor chopper folding accuracy, and is in contact with the stopper (abutting).

Therefore, in Patent Document 1, a speed adjustment belt that travels at a slower speed than the conveyor belt is disposed between conveyor belts adjacent in the width direction, so that the moving speed of the signature is moderately reduced and the folding is performed. Disclosed is an apparatus that can guide a signature to a reference position at an appropriate timing, thereby enabling the signature to be chopper folded while maintaining the folding accuracy of the signature without damaging the signature. Has been.
Japanese Patent Laid-Open No. 11-5668

  However, in the apparatus of Patent Document 1, it is difficult to adjust the belt contact pressure that presses and contacts the speed adjustment belt to the signature to decelerate the signature, and the conveyance belt becomes complicated. There was a problem of poor maintainability.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a conveyance device that can effectively adjust the bending during sheet-like material conveyance to improve chopper folding accuracy and prevent scratches.

  In order to achieve the above object, a conveying device according to the present invention includes a conveying belt that is arranged in plural along the width direction of a sheet-like material and conveys the sheet-like material, and the sheet-like material conveyed by the conveying belt. In a transport device including a chopper device for chopper folding, a plurality of the transport belts, one transport belt transporting one side of the sheet material, and the other transporting the other side of the sheet material And a first driving source that drives the one-side conveying belt and a second driving source that drives the other-side conveying belt, and bends the sheet-like material being conveyed. It is characterized by comprising a sensor for detecting, and a control means for changing the speed of the other-side conveyor belt with respect to the one-side conveyor belt by the detection output of the sensor.

  In addition, in a transport device comprising a plurality of transport belts arranged along the width direction of the sheet material to transport the sheet material, and a chopper device for chopper folding the sheet material transported by the transport belt, The plurality of arranged conveyor belts are constituted by one side conveyor belt that conveys one side of the sheet-like material and the other side conveyor belt that conveys the other side of the sheet-like material, and the one-side conveyor belt And a first drive source for driving the other-side conveyor belt and a second drive source for driving the other-side conveyor belt in an auxiliary manner as necessary, and detects the bending of the sheet-like material being conveyed. And a control means for changing the speed of the other-side conveyor belt with respect to the one-side conveyor belt according to the detection output of the sensor.

  The first drive source may be a first motor, and the second drive source may be a second motor that drives the other-side transport belt independently of the first motor. .

  The first drive source is a first motor, and the second drive source is a second motor that drives a differential device interposed in a drive path between the first motor and the other-side transport belt. It is a motor.

  The drive roller around which the conveyor belt is wound includes a reference rotation roller around which the one-side conveyor belt is wound, and a rotation roller supported on the rotation shaft of the reference rotation roller so that the other-side conveyor belt is It is characterized by being divided into a correction roller to be wound.

  Further, the control means controls the upper and lower conveying belts that convey the sheet-like material.

  According to the present invention having the above-described configuration, by changing the speed of the other-side conveyance belt by simple driving means and control means, the bending during sheet-like material conveyance can be effectively adjusted to improve the chopper folding accuracy and to apply it. Scratches can be prevented.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a transport apparatus according to the present invention will be described in detail with reference to the drawings by way of examples.

  1 is a schematic configuration diagram of a driving roller and a driving path in a folding machine showing Embodiment 1 of the present invention, FIG. 2 is a schematic configuration diagram of a conveying belt, FIG. 3 is a plan view of a lower conveying belt, and FIG. A block diagram and FIG. 5 are flowcharts of speed control in the other-side conveying belt.

  As shown in FIGS. 2 and 3, the chopper device 1 provided in the folding machine of the rotary printing press has an upper conveying belt 3 in which a plurality of signatures (sheet-like materials) 2 are arranged along the width direction. 4, 5 and the lower conveyor belt 6 are held and conveyed, and the tip of the signature 2 is abutted and regulated by the contact 7, and at the same time, the chopper is folded by the chopper blade 1a and discharged to an impeller (not shown). It has become so.

  Reflective optical sensors 8 and 9 serving as sensors for detecting the bending of the signature 2 are to be detected on both the left and right ends of the signature 2 on the upstream side of the chopper device 1 in the upper conveyance belt 4 in the conveyance direction. A pair of left and right are installed, and the detection signal is input to a control device (control means) 20 described later.

  As shown in FIG. 1, the driving roller 10 of the lower conveying belt 6 is similar to the driving roller 11 of the upper conveying belt 4, and the lower conveying belt (one-side conveying belt) 6 a to 6 c on the optical sensor 8 side (left half). And a lower conveying belt on the optical sensor 9 side (right half) that is fitted on the rotating shaft 12 of the reference rotating roller 10a via bearings 13a and 13b so as to be relatively rotatable. The other side conveyor belts 6d to 6f are divided into correction rollers 10b around which the belts are wound. Both end portions of the rotary shaft 12 are rotatably supported by a pair of left and right folding machine frames 18a and 18b via bearings 19a and 19b.

  The reference rotation roller 10a is rotationally driven by a driving motor (first motor) 15 with a reference rotation speed encoder 15a (see FIG. 4) through a gear train 14, and the correction roller 10b is transmitted through a gear train 16. It is rotationally driven by a servo motor (second motor) 17 provided independently of the driving motor 15.

  Then, as shown in FIG. 4, the control device 20 detects the amount of bending of the signature 2 based on the detection signals from the optical sensors 8 and 9, and the number of rotations of the servo motor 17 (in accordance with the amount of bending ( The speed of the lower conveyor belts 6d to 6f on the optical sensor 9 side is controlled to increase / decrease using a map or the like set in advance based on the rotational speed of the driving motor 15 from the reference rotational speed encoder 15a. Yes.

  There are the following two methods for detecting the amount of bending of the signature 2 based on the detection signals from the optical sensors 8 and 9. One is to measure the amount of bending of the signature 2 by comparing the reflection amounts of the optical sensors 8 and 9 when the tip of the signature 2 is at a predetermined optical sensor installation position in front of the pad 7. is there. The other is to measure the time difference at which the optical sensors 8 and 9 detect the leading edge of the signature 2 to measure the amount of bending of the signature 2. For example, when the signature speed is 8 m / sec, the optical sensors 8 and 9 If the detection time difference is 0.001 sec, the bending amount is 8 mm.

  Next, speed control in the lower conveyance belts 6d to 6f on the optical sensor 9 side will be described in detail with reference to the flowchart of FIG.

  First, if the driving motor 15 is driven in Step P1, it is determined whether or not the servo motor 17 is driven in Step P2. If both the motors 15 and 17 are driven and the folding machine is in operation, Step At P3, the optical sensors 8 and 9 determine whether or not the signature 2 is detected at the same time.

  If the signature 2 is detected at the same time in step P3, it is determined that the signature 2 is not bent, and the current conveyance state is continued until the signature conveyance is completed. On the other hand, if the signature 2 is not detected at the same time in Step P3, it is determined whether or not the optical sensor 8 has detected the signature 2 in Step P5. In step P7, the servomotor 17 is decelerated as described above in step P7 and the process returns to step P3.

  In this way, in this embodiment, the bending of the conveyed signature 2 is detected by the optical sensors 8 and 9, and the detection outputs of the optical sensors 8 and 9 are used for the lower conveying belts 6 a to 6 c on the optical sensor 8 side. Since the bending is corrected by changing and controlling the speed of the lower conveying belts 6d to 6f on the optical sensor 9 side, the bending of the signature 2 can be effectively corrected by simple driving means and control means. Improves chopper folding accuracy and prevents scratches.

  Further, the lower conveyance belts 6a to 6c on the optical sensor 8 side are the driving motor 15 with the encoder 15a for the reference rotation speed, and the lower conveyance belts 6d to 6f on the optical sensor 9 side are the servo motor 17 independent of the driving motor 15. Therefore, the driving path can be simplified and motor control can be facilitated.

  In addition, the driving roller 10 (11) is fitted with a reference rotation roller 10a driven by a driving motor 15 and a rotation shaft 12 of the reference rotation roller 10a so as to be relatively rotatable and driven by a servo motor 17. Since it is divided into the roller 10b, the apparent speed of the lower conveying belts 6d to 6f on the optical sensor 9 side can be effectively changed with respect to the lower conveying belts 6a to 6c on the optical sensor 8 side.

  In addition, since the control device 20 controls the upper and lower conveying belts that sandwich and convey the signature 2, the bending of the signature 2 can be corrected more reliably.

  FIG. 6 is a schematic configuration diagram of a driving roller and a driving path in the folding machine according to the second embodiment of the present invention.

  This is because the correction roller 10b according to the first embodiment is driven by a driving motor (first motor) 15 similarly to the reference rotation roller 10a, and a harmonic drive (registered trademark) is provided in the drive path between the correction roller 10b and the driving motor 15. This is an example in which a differential device 21 composed of a device is interposed, and the differential device 21 is driven by a phase adjustment motor (second motor) 22.

    The harmonic drive device has a wave generator, a flex spline fitted to the outer periphery of the wave generator, and a pair of circular splines meshed to the outer periphery of the flex spline as basic elements, and the number of teeth of the circular spline is the number of teeth of the flex spline. A known differential mechanism in which an output gear is screwed into one of the circular splines and an input gear is screwed into the other, and the reduction ratio is determined by the number of teeth of the flexspline and the circular spline. It is.

  Therefore, during the normal operation, the phase adjusting motor 22 is stopped, so that the rotation of the driving motor 15 is transmitted to the correction roller 10b through the differential device 21 and the gear train 16 at a ratio of 1: 1. 15 rotates at the same rotation speed as the reference rotation roller 10a that is directly rotated. On the other hand, when the phase adjustment motor 22 is rotated, a slight rotational difference is generated between the reference rotation roller 10a and the correction roller 10b due to the deceleration action of the differential device 21, and the bending of the signature 2 is caused by this phase adjustment. Will be corrected. After the correction, when the phase adjustment motor 22 is stopped, the correction roller 10b becomes the original rotation speed (the same rotation speed as that of the reference rotation roller 10a).

  Also in this embodiment, the same actions and effects as those in Embodiment 1 can be obtained.

  FIG. 7 is a schematic configuration diagram of a drive roller and a drive path in the folding machine showing Embodiment 3 of the present invention.

  The rotation shaft 12 in the first embodiment is a fixed shaft 12A, and a reference rotation roller 10a and a correction roller 10b are rotatably supported by a pair of left and right bearings 13a and 13b on the fixed shaft 12A. In this example, the servomotors 17A (first motor) and 17B (second motor) are driven to rotate by gear trains 16A and 16B.

  Accordingly, during normal operation, the servo motor 17B is rotated in accordance with the rotation speed of the servo motor 17A, which is the same as the rotation speed of the driving motor (not shown), and the correction roller 10b rotates at the same rotation speed as the reference rotation roller 10a. To do. On the other hand, by making the rotation speed of the servo motor 17B different from the rotation speed of the servo motor 17A by the amount corresponding to the bending amount of the signature 2 detected by the optical sensors 8 and 9, the reference rotation roller 10a and the correction roller 10b are changed. A rotation difference occurs between the two and the bending of the signature 2 is corrected by this phase adjustment.

  Also in this embodiment, the same actions and effects as those in Embodiment 1 can be obtained.

  The conveying apparatus according to the present invention can be applied not only to a rotary printing press but also to a coating machine or the like.

It is a schematic block diagram of the drive roller and drive path in a folding machine which shows Example 1 of this invention. It is a schematic block diagram similarly of a conveyance belt. It is a top view of a lower conveyance belt similarly. It is a control block diagram. It is a flowchart of the speed control in the lower conveyance belt by the side of the optical sensor. It is a schematic block diagram of the drive roller and drive path in the folding machine which shows Example 2 of this invention. It is a schematic block diagram of the drive roller and drive path in a folding machine which shows Example 3 of this invention. It is a schematic block diagram of the conventional chopper apparatus. It is a schematic block diagram of the driving roller and driving path in the folding machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Chopper apparatus 1a Chopper blade 2 Signature 3, 4, 5 Upper conveyance belt 6 Lower conveyance belt 6a-6c Lower conveyance belt 6d-6f on the sensor 8 side (left half) Lower conveyance belt 7 on the sensor 9 side (right half) 7 8, 9 Optical sensor 10, 11 Drive roller 10 a Reference rotation roller 10 b Correction roller 12 Rotation shaft 12 A Fixed shaft 13 a, 13 b Bearing 14, 16 Gear train 15 Driving motor 16, 16 A, 16 B Gear train 17, 17 A, 17 B Servo motor 15a Reference speed encoder 18a, 18b Folding frame 19a, 19b Bearing 20 Control device 21 Differential device 22 Phase adjustment motor

Claims (6)

In a transport device comprising a transport belt that is arranged in plural along the width direction of the sheet material and transports the sheet material, and a chopper device that choppers the sheet material transported by the transport belt,
A plurality of the transport belts are configured by one side transport belt that transports one side of the sheet-like material and the other side transport belt that transports the other side of the sheet-like material,
A first drive source for driving the one-side conveyor belt; and a second drive source for driving the other-side conveyor belt;
A sensor for detecting the bending of the sheet-like material being conveyed, and a control means for changing the speed of the other-side conveying belt with respect to the one-side conveying belt by a detection output of the sensor. Conveying device. In a transport device comprising a transport belt that is arranged in plural along the width direction of the sheet material and transports the sheet material, and a chopper device that choppers the sheet material transported by the transport belt,
A plurality of the transport belts are configured by one side transport belt that transports one side of the sheet-like material and the other side transport belt that transports the other side of the sheet-like material,
A first drive source that drives the one-side conveyor belt and the other-side conveyor belt; and a second drive source that auxiliaryly drives the other-side conveyor belt as necessary.
A sensor for detecting the bending of the sheet-like material being conveyed, and a control means for changing the speed of the other-side conveying belt with respect to the one-side conveying belt by a detection output of the sensor. Conveying device.   The first drive source is a first motor, and the second drive source is a second motor that drives the other-side transport belt independently of the first motor. The transfer apparatus according to 1.   The first drive source is a first motor, and the second drive source is a second motor that drives a differential device interposed in a drive path between the first motor and the other-side transport belt. The conveyance device according to claim 2, wherein the conveyance device is provided.   The drive roller around which the conveyor belt is wound includes a reference rotation roller around which the one-side conveyor belt is wound, and a rotation roller supported on the rotation shaft of the reference rotation roller so that the other-side conveyor belt is wound around The conveying device according to claim 1, wherein the conveying device is divided into a correction roller.   3. The conveying apparatus according to claim 1, wherein the control unit controls the upper and lower conveying belts that convey the sheet-like material.

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