JP2799216B2 - Chopper folding device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a chopper folding device for a folding machine installed in a printing machine.

(Background technology)

Conventionally, in rotary presses, etc., the chopper blade of the chopper folding device and the conveyor belt are synchronously driven by using the drive system of the folder, so that the timing between the conveyance of the signature by the conveyor belt and the vertical movement of the chopper blade. The chopper is folded together.

At this time, if the speed of the conveying belt changes with the change in the printing press speed, the timing of chopper folding with respect to the signature may be shifted due to the slip of the signature with respect to the belt, the influence of the inertia of the signature, and the like. If the chopper folding timing is shifted, there is a problem that the signature is torn or damaged, resulting in a defective product. Therefore, when the chopper folding timing is shifted, it is necessary to adjust the timing between the vertical movement of the chopper blade and the conveyance of the signature.

Conventionally, this timing adjustment is performed by the operator of the folding machine visually monitoring the chopper folding timing, that is, the timing at which the signature and the chopper blade come into contact with each other, and stopping the machine when a timing deviation is found. The chopper folding timing is corrected by adjusting the meshing of the helical gears provided in the drive system of the chopper blade.

If the edge of the transported signature is not perpendicular to the transport direction but is inclined, the signature is obliquely folded by the chopper blade. For this reason, a chopper stopper is provided on the conveyor belt, and the signature is brought into contact with the stopper to correct the inclination.

[Problems to be solved by the invention]

However, when the chopper folding timing is visually monitored, it cannot be found unless the timing deviation becomes large to some extent. For this reason, it takes time to find the timing shift,
Since the timing shift also becomes large, there has been a problem that folding failure is likely to occur. Furthermore, since it is difficult to automatically detect a broken or damaged folding defective product, the product includes a folding defective product, and therefore, there is a problem that the entire product must be inspected.

In addition, there is a need for an observer to monitor the chopper folding timing, which requires labor costs, and the observer must monitor the chopper blades and the like that operate at a considerable speed, which places a burden on the observer. There was also.

On the other hand, when the signature is brought into contact with the chopper stopper and the inclination is corrected, the signature can be corrected if the inclination of the signature is within a certain range. However, there is a problem that the inclination cannot be corrected even if the signature is brought into contact with the sheet, and a folding failure occurs. For this reason, the product includes a defective folding product, and there is a problem that the entire product must be inspected.

An object of the present invention is to eliminate the presence of defective folding products, and more specifically, a chopper folding device that can automatically correct chopper folding timing without manual intervention, An object of the present invention is to provide a chopper folding device capable of automatically detecting a folding failure due to a signature inclination.

[Means for solving the problem]

A chopper folding device according to the present invention includes a chopper blade and a transport belt that are synchronously driven by using a drive system of a folding machine provided in a printing press, and timing correction means. Timing adjusting means provided in at least one drive system of the blade and the transport belt to adjust the timing of chopper folding; a sensor for detecting an edge of a signature transported by the transport belt; A rotation angle detector for detecting a rotation angle of a moving shaft, a rotation angle detection unit for detecting a rotation angle of the shaft when the sensor detects a signature from the rotation angle detector, and a rotation angle detection unit. Timing adjustment amount calculating means for calculating a timing adjustment amount from the detected rotation angle and a preset set value; It is characterized in that it has a drive control means for driving and controlling the timing adjusting unit based on the ring adjustment amount.

Here, it is preferable to use a differential mechanism, particularly a differential gear mechanism, as the timing adjusting means.

Further, the chopper folding device of the present invention includes a chopper blade and a transport belt that are synchronously driven by using a drive system of a folding machine attached to the printing press, and a folding failure detecting unit. A plurality of sensors that are provided in the direction perpendicular to the conveying direction of the signatures conveyed by the conveyance belt and detect the edges of the signatures; Inclination detection means for detecting the inclination of the edge with respect to the feed direction, judgment means for judging a folding failure based on the inclination detected by the inclination detection means, and a rotation angle detector for detecting the rotation angle of a shaft for vertically moving the chopper blade Wherein the inclination detecting means determines the rotation angle of the shaft when each sensor detects a signature by the rotation angle detector, and detects the inclination from the angle difference. Is shall.

Further, the inclination detecting means of the folding failure detecting means may obtain the inclination from a time difference when each sensor detects a signature and the conveying speed of the conveying belt.

[Action]

In the present invention, since the chopper blade and the transport belt of the chopper folding device are driven synchronously using the drive system of the folding machine, if the chopper folding timing is constant,
The rotation angle of the shaft when the sensor detects the signature is also constant. A rotation angle corresponding to the chopper folding timing is set in advance as a set value.

Next, when the folding machine is operated and the sensor detects the signature conveyed by the conveyance belt, a predetermined signal is sent to the rotation angle detecting means. The rotation angle detecting means detects a rotation angle of the shaft from a rotation angle detector according to a signal from the sensor. The timing adjustment amount setting means calculates the magnitude of the timing deviation, that is, the timing adjustment amount, from the difference between the rotation angle and the set value.

The drive control means controls the drive of the timing adjustment means based on the timing adjustment amount, whereby the chopper folding timing is automatically corrected to a preset timing, so that the deviation of the chopper folding timing is eliminated, and the occurrence of a folding defect also occurs. Disappears.

On the other hand, when the signature is conveyed while being inclined on the conveyance belt, the timing at which each sensor detects the signature is shifted. The inclination detecting means obtains the deviation of the detection timing as a difference in the rotation angle of the shaft or a difference in the detection time when each sensor detects the signature, and detects the inclination of the signature from the value. Then, if the inclination is larger than the predetermined inclination, that is, if the inclination cannot be corrected even if the signature is brought into contact with the chopper stopper, it is determined that the folding is defective, and thereby the product is determined to be defective. This makes it possible to detect and eliminate defective folding products before they become necessary.

〔Example〕

 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a chopper folder according to an embodiment of the present invention.
91 configurations are shown. The folder including the chopper folder 91 is driven by a drive system 92 connected to a motor 93 of the printing press. The drive system 92 is connected to a drive system 94 of the chopper blade 12, a drive system 95 of the transport belt 21 that transports the signature 30, and the like. A driving system 94 of the chopper blade 12 includes a differential mechanism 96 as timing adjustment means and a chopper blade driving shaft 11 for vertically moving the chopper blade 12.
Is provided. The differential mechanism 96 may be provided in the drive system 95 of the conveyor belt 21 as shown in FIG. 1, or may be provided in each of the drive systems 94 and 95.

The chopper blade drive shaft 11 is connected to an encoder 41 which is a rotation angle detector for detecting the rotation angle of the shaft 11.

As shown in FIG. 2, the transport belt 21 is perpendicular to the transport direction of the signature 30, that is, in the direction along the edge of the signature. Beam sensors 42 and 43 are arranged at positions apart from each other. The beam sensors 42 and 43
It is arranged at a predetermined position on the near side in the transport direction from the chopper stopper 44 arranged above.

The outputs of the beam sensors 42 and 43 and the encoder 41 are, as shown in FIG. 1, a rotation angle detection means 51 for detecting the rotation angle of the chopper blade drive shaft 11 and a tilt detection means for detecting the inclination of the signature 30. 61 connected to each other.

The rotation angle detecting means 51 includes a timing adjustment amount calculating means.
A drive control means 53 for controlling the drive of the differential mechanism 96 is connected to the timing adjustment amount calculation means 52.

Further, the inclination detecting means 61 is connected to a judging means 62 for judging a folding failure of the signature 30.

Here, the encoder 41, the beam sensors 42 and 43, the rotation angle detection unit 51, the timing adjustment amount calculation unit 52, the drive control unit 53, and the timing correction unit
50 are configured. In addition, encoder 41, beam sensor 42,
The folding failure detecting means 60 is constituted by 43, the inclination detecting means 61 and the judging means 62. Note that the control unit 90 of the printing device is connected to the determination unit 62.

FIG. 2 shows the configuration of the drive system 94 and the differential mechanism 96 of the chopper arm 12B, and FIG. 3 is a view taken in the direction of the arrow Z in FIG.

2, a shaft 1 of a drive system 92 of the folding machine is connected to a shaft 3 via a torque limiter 2, and a gear 4 is fixed to an end of the shaft 3.

The external teeth of a first internal gear 6 are meshed with the gear 4, and the first internal gear 6 rotates via a bearing 5A on a non-eccentric portion of an eccentric shaft 5 rotatably supported by a frame (not shown). It is freely supported.

An eccentric gear 7 rotatably supported by an eccentric portion 5E of the eccentric shaft 5 via a bearing 5B is meshed with the internal teeth of the first internal gear 6. The eccentric gear 7 meshes with the internal teeth of a second internal gear 8 rotatably supported on a non-eccentric portion of the eccentric shaft 5 via a bearing 5C. The internal teeth of the second internal gear 8 are so-called shift gears, which have the same pitch circle as the internal teeth of the first internal gear 6 and have one less tooth.

A gear 9B supported on a shaft 9 via a bearing 9A meshes with the external teeth of the second internal gear 8, and a gear 10 fixed to one end of a chopper blade drive shaft 11 meshes with the gear 9B. ing. An encoder 41 is attached to one end of the chopper blade drive shaft 11. A substantially disk-shaped flange 11A is fixed to the other end of the chopper blade drive shaft 11,
An eccentric pin 13 is fixed to the flange 11A.

The eccentric pin 13 is supported by a bearing 12A fixed to one end of the chopper arm 12B, as shown in FIG. The chopper arm 12B includes a chopper blade 12 at one end thereof, and the other end is rotatably supported by a bearing 12C fixed to the carrier 20. This carrier 2
The transport belt 21 that is driven to rotate by the drive system 95
Are placed, and the signature 30 is transported by the transport belt 21.

On the other hand, a bevel gear 14 is fixed to one end of the eccentric shaft 5. A bevel gear 15 fixed to an output shaft 16 of a motor 18 is meshed with the bevel gear 14, and further coupled to the output shaft 16.
The potentiometer 17 is connected via 17A.

Here, the differential mechanism 96 of the present embodiment is constituted by the differential gear mechanism including the gear 4, the eccentric shaft 5, the first and second internal gears 6, 8 and the eccentric gear 7. A drive control means 53 is constituted by the potentiometer 17 and the motor 18.

 Next, the operation of the present embodiment will be described.

First, the set value X of the chopper folding timing is set in the timing adjustment amount calculating means 52. This set value X is
The length x between the signature 30 and the chopper stopper 44 when the signature 30 and the chopper blade 12 come into contact is set as the rotation angle of the chopper blade drive shaft 11 when 30 is detected by the beam sensors 42 and 43. Set according to mm.

Further, an allowable value Y of the inclination of the signature 30 is set in the determination means 62. The permissible amount Y is set by converting the permissible inclination amount y mm of the signature 30 into the rotation angle of the chopper blade drive shaft 11.

Next, when the folding machine is driven, the rotation from the driving system 92 of the folding machine is transmitted to the shaft 1 and passes through the torque limiter 2 to the driving system 94.
To rotate the gear 4. The rotation of the gear 4 is transmitted to the first internal gear 6, the eccentric gear 7, the second internal gear 8, the gear 9B and the gear 10 in this order without rotating the eccentric shaft 5, and finally the chopper blade drive shaft 11 is transmitted. Rotate.

With the rotation of the chopper blade drive shaft 11, the flange 11
Chopper arm 1 connected by eccentric pin 13 provided on A
2B swings with the bearing 12C as a fulcrum, and the chopper blade 1
2 moves up and down.

On the other hand, the transport belt 21 is driven by the drive system 95 branched from the shaft 1.
Are rotated, and the signatures 30 are sequentially conveyed by the driving.

When the beam sensors 42 and 43 detect the edge of the conveyed signature 30, the beam sensors 42 and 43 send a predetermined signal to the rotation angle detecting means 51 and the inclination detecting means 61. The detection means 51 and 61 detect the rotation angles α and β of the chopper blade drive shaft 11 when the sensors 42 and 43 detect the signature 30 in accordance with signals from the sensors 42 and 43, respectively.

The rotation angle detecting means 51 calculates an average rotation angle θ = (α + β) / 2 of the chopper blade drive shaft 11 at the time of detecting the signature 30, and the timing adjustment amount calculating means 52 calculates a predetermined set value X and an average rotation angle. The difference from the angle θ, that is, the amount of timing correction, is calculated using the following equation: X−θ = [X− (α + β) / 2] (1)

The drive control means 53, that is, the motor 18 and the potentiometer 17 drive control the rotation direction and the rotation angle of the eccentric shaft 5 of the differential mechanism 96 based on the correction amount.

With the rotation of the eccentric shaft 5, the eccentric gear 7 supported by the eccentric portion 5E of the eccentric shaft 5 rolls along the internal teeth of the first internal gear 6 and the internal teeth of the second internal gear 8. At this time, since the second internal gear 8 has one less tooth than the first internal gear 6,
Due to the rolling of the eccentric gear 7, the first internal gear 6 and the second internal gear 8 produce a differential in the rotational direction.

The rotation of the first internal gear 6, that is, the rotation of the second internal gear 8, the phase of which has been changed compared to the rotation of the shaft 1, is the gear 9 B, the gear 10,
It is transmitted to the shaft 11, the flange 11A, and the eccentric pin 13, and swings the chopper arm 12B with the bearing 12C as a fulcrum to move the chopper blade 12 up and down.

Therefore, the phase of rotation of the drive system 94 of the chopper blade 12 with respect to the drive system 95 of the conveyor belt 21 is adjusted, and the chopper folding timing is automatically corrected.

On the other hand, the inclination detecting means 61 obtains the absolute value | α-β | of the difference between the rotation angles α and β, and the determining means 62 compares the preset allowable value Y with the absolute value | α-β |. Here, if the signature 30 is correctly transported without tilting, the sensors 42 and 43 detect the signature 30 at the same time, so the chopper blade drive shaft 11
Are equal, and the absolute value | α−β | of the difference between the rotation angles α and β is zero. If the signature 30 is tilted, the absolute value | α−β | becomes larger than zero.

If the absolute value | α−β | is larger than the allowable value Y, the judging means 62 judges that the signature 30 is not properly folded. The control means 90 eliminates the signature 30 determined to be a folding failure in a subsequent line.

According to the present embodiment having such a configuration, the following effects can be obtained.

That is, the timing correction means
Since 50 is provided, even if the chopper folding timing is shifted, the shift can be immediately and automatically corrected. Therefore, it is possible to eliminate a folding defect due to a shift in chopper folding timing, and there is no possibility that defective products due to a shift in timing are mixed in a product.

Further, since the folding failure detecting means 60 is provided, the folding failure due to the inclination of the signature 30 can be reliably and automatically detected. Therefore, the detected defective folding product can be eliminated in the subsequent line, and the product does not include the defective folding product due to the inclination of the signature 30.

Therefore, according to the present embodiment, it is possible to prevent both a defective folding product caused by a shift of the chopper folding timing and a defective folding product caused by the inclination of the signature 30 from being mixed in the product, Therefore, it is possible to eliminate the inspection of all products.

Further, since the timing of the chopper folding can be automatically corrected, a person who monitors the chopper folding as in the related art becomes unnecessary, so that labor costs can be reduced and the operation can be easily performed.

Further, since a differential mechanism 96 including the gear 4, the eccentric shaft 5, the first and second internal gears 6 and 8, and the eccentric gear 7 is provided in the drive system 94 of the chopper blade 12, the signature 30 is transported. belt
The rotation phase of the drive system 94 of the chopper blade 12 can be continuously and steplessly and infinitely adjusted with respect to the drive system 95 of 21.
Therefore, the chopper folding timing can be freely adjusted without stopping the machine, and the chopper folding timing can be automatically and reliably corrected.

Further, the differential mechanism 96 is connected to the gear 4, the eccentric shaft 5, the first and second internal gears 6, 8 and the eccentric gear 7 meshing with the internal teeth of the gears 6, 8.
, The overall size can be reduced. Therefore, the arrangement space in the folding machine can be reduced, and it can be applied to existing folding machines without difficulty.

It should be noted that the present invention is not limited to the configuration and the like of the above-described embodiment, and modifications within a range that can achieve the object of the present invention are included in the present invention.

For example, in the above-described embodiment, the chopper folding device 91 is provided with the timing correction unit 50 and the folding failure detection unit 60. However, only one of them may be provided. In particular, a chopper folding device in which the signature 30 is transported without tilting
In the case of 91, only the timing correction means 50 needs to be provided, while in the chopper folding apparatus 91 in which no timing shift occurs due to no change in the speed of the transport belt 21, only the folding failure detection means 60 may be provided.

Further, in the above-described embodiment, as the timing adjusting means of the timing correcting means 50, a differential gear mechanism constituted by the gear 4, the eccentric shaft 5, the first and second internal gears 6, 8 and the eccentric gear 7 is used. Although the mechanism 96 is used, a differential gear mechanism having another configuration may be used. That is, as shown in FIGS. 4 and 5, the gear 72 fixed to the drive shaft 71 on the drive system 92 side.
And a gear fixed to the drive shaft 73 on the chopper blade 12 side
A differential mechanism 96 as a timing adjusting means may be constituted by the differential gear mechanism 70 including only the external gear without using the internal gear by the gear 74 and the gear 75 meshing with the two gears 72, 74. The gears 72 and 74 are configured to have the same pitch diameter and different numbers of teeth due to transposition, and the gear 75 is rotatably supported by an eccentric shaft 77 of an arm 76 rotated by the motor 18.

In such a differential gear mechanism 70 as well, by rotating the arm 76 by the motor 18 and rolling the gear 75 along the gears 72 and 74, the drive shaft 71 and the drive shaft 73 are differentially rotated in the rotational direction. And the timing of chopper folding is adjusted.

Further, the timing adjusting means is not limited to the one using gears. As shown in FIGS. 6 and 7, timing pulleys 81, 82 fixed to drive shafts 71, 73, respectively.
And timing pulleys 83 and 84 rotatably supported by the eccentric shaft 77 of the arm 76, and timing pulleys 81, 82 and 83, 8
A differential mechanism 80 having timing belts 85 and 86 stretched between four may be used. Even in such a differential mechanism 80, the chopper folding timing can be adjusted by rotating the arm 76 via the timing belt 87 by the motor 18.

The timing adjusting means is not limited to the differential mechanism. For example, a helical gear meshing with the driving system is provided, and one of the helical gears is moved in the axial direction to adjust the meshing. A mechanism for adjusting the chopper folding timing may be used. However, the use of the differential mechanism has the advantage that the timing adjustment can be performed continuously and steplessly without any limitation.

Furthermore, although the timing correction means 50 uses two beam sensors 42 and 43, one beam sensor may be used.

Further, the folding defect detecting means 60 of the above embodiment detects the inclination of the signature 30 from the rotation angle of the chopper blade drive shaft 11, but the difference between the time when the beam sensors 42 and 43 detect the signature 30 is The inclination of the signature 30 may be detected from the speed of the conveyor belt 21. However, there is an advantage that the detection based on the rotation angle of the shaft 11 can be performed regardless of the speed of the transport belt 21 as in the above-described embodiment.

Further, the sensor is not limited to the beam sensors 42 and 43, and any sensor that can detect the edge of the signature 30 can be used. Also, the rotation angle detector is not limited to the encoder 41,
What is necessary is just to be able to detect the eleven rotation angles.

Further, the drive control means 53 is not limited to the motor 18 and the potentiometer 17, but may be, for example, a commercially available, publicly-known pulse motor, an AC or DC servo motor, and a microcomputer for controlling the same. What is necessary is just to select suitably.

In addition, in order to move the chopper blade 12 up and down, various configurations can be used, and it is sufficient that the chopper blade 12 is appropriately selected for implementation, and is not limited to the above embodiment.

〔The invention's effect〕

As described above, according to the chopper folding device provided with the timing correcting means of the present invention, the effect that the chopper folding timing can be automatically corrected and the occurrence of the folding failure due to the timing deviation can be eliminated. is there.

Further, according to the chopper folding device provided with the folding defect detecting means, there is an effect that the defective folding product due to the inclination of the signature can be automatically detected, and the mixing of the defective folding product in the product can be eliminated.

[Brief description of the drawings]

1 to 3 are diagrams showing an embodiment of the present invention. FIG. 1 is a schematic diagram showing the configuration of a timing correction means and a folding failure detection means, and FIG. 2 is a drive system and a differential of a chopper blade. FIG. 3 is a plan view showing the mechanism and FIG. 3 is a view taken in the direction of the arrow Z in FIG. 2, FIG. 4 is a sectional view showing a modification of the differential mechanism, and FIG. 5 is a line V-V in FIG. 6, FIG. 6 is a sectional view showing another modified example of the differential mechanism, and FIG. 7 is a sectional view taken along line VII-VII of FIG. 1 ... shaft, 4, 9B, 10 ... gear, 5 ... eccentric shaft, 6 ... first internal gear, 7 ... eccentric gear, 8 ... second internal gear, 11
…… Chopper blade drive shaft, 12 …… Chopper blade, 12B …… Chopper arm, 17… Potentiometer, 18 …… Motor, 21 …… Conveyer belt, 30 …… Signature, 41
... Encoders serving as rotation angle detecting means, 42, 43 beam sensors, 50 timing correction means 51 rotation angle detecting means 52 timing correction amount calculating means 53
Drive control means, 60: folding failure detecting means, 61: inclination detecting means, 62: determining means, 70: differential gear mechanism, 80, 96
…… Differential mechanism, 91 …… Chopper folding device, 92,94,95 ……
Drive system.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B65H 45/00-45/30 B41F 13/56 G01N 21/89

Claims (3)

(57) [Claims] 1. A chopper folding device comprising a chopper blade and a transport belt synchronously driven by using a drive system of a folding machine provided in a printing press, wherein at least one of the chopper blade and the transport belt is driven. A timing adjusting means provided therein for adjusting the timing of chopper folding, a sensor for detecting an edge of a signature conveyed by the conveyance belt, and a rotation for detecting a rotation angle of a shaft for vertically moving the chopper blade. An angle detector, rotation angle detection means for detecting the rotation angle of the shaft when the sensor detects the signature from the rotation angle detector, and a rotation angle detected by the rotation angle detection means and a preset rotation angle. Timing adjustment amount calculating means for calculating a timing adjustment amount from a set value, and the timing adjustment means based on the timing adjustment amount Chopper folding device, comprising: timing correction means having drive control means for controlling the driving of the chopper. 2. A chopper folding apparatus comprising a chopper blade and a transport belt synchronously driven by using a drive system of a folding machine provided in a printing press, wherein a transport direction of signatures transported by the transport belt is provided. A plurality of sensors provided in the vertical direction with respect to the signature to detect the edge of the signature, and inclination detecting means for detecting the inclination of the edge of the signature with respect to the feed direction based on the output from each of the sensors detecting the signature. And a determining means for determining a folding failure based on the inclination detected by the inclination detecting means. The folding failure detecting means detects a rotation angle of a shaft that vertically moves the chopper blade. A rotation angle detector, wherein the inclination detection means obtains the rotation angle of the shaft when each sensor detects the signature by the rotation angle detector, and calculates the rotation angle from the angle difference. A chopper folder that detects an inclination. 3. A chopper folding device according to claim 2, wherein said inclination detecting means obtains said inclination from a time difference when each sensor detects a signature and a conveying speed of the conveying belt. Folding device.