JP4452307B2 - Rotary press folding device - Google Patents

Description

  The present invention relates to a folding device for a rotary press suitable for use in a newspaper rotary press or the like.

  The newspaper offset rotary press includes a paper feeding device, a printing device, a folding device 2 shown in FIG. 5 and a paper discharge device 16 for carrying out the folded book 6 (see FIG. 6) formed and processed in the folding device 2 to the outside. It is configured.

  In FIG. 5, the web 3 that has finished printing is continuously conveyed from the printing device side in the previous process, guided by the drag roller 17, and then longitudinally (sheeted) by a triangular plate 18 provided at the entrance of the folding machine 2. Folded along the travel direction). Next, after being sandwiched and rotated by the lead-in rollers 19, 19, nipping rollers 20, 20, etc. disposed below, they are fed between the saw cylinder 4 and the folding cylinder 5.

  As shown in FIG. 6, a saw blade 22 supported by a saw table 21 is disposed on the outer peripheral surface of the saw body 4 along the axial direction thereof. In addition, a pair of saw blade receivers 23 having a function as a receiving member for the saw blade 22 are attached to the folding cylinder 5 along the axial direction, and the web 3 is conveyed by being pierced at the leading end of the web 3. A folding blade 25 for folding the vicinity of the center of the web 3 cut by the needle 24 and the saw blade 22 is attached.

The saw cylinder 4 and the folding cylinder 5 rotate synchronously, and their rotational phases are set so that the saw blade 22 and the saw blade receiver 23 mesh with each other.
The needle 24 is attached to the tip of a needle arm 24b assembled to the needle shaft 24a, and enters and exits from the circumferential surface of the folding cylinder 5 at a predetermined rotational phase position. That is, the needle 24 protrudes from the surface of the folding cylinder 5 just before the web 3 is cut by the saw blade 22 and the saw blade receiver 23 and pierces the tip of the web 3. It has a function to rotate and transfer along the outer peripheral surface.

When the central portion between the leading end of the web 3 and the next cutting position approaches the position immediately above the folding rollers 1 and 1 due to the rotational transfer of the web 3, the needle 24 comes out and the web is moved by the action of the folding blade 25 described later. 3 is pushed into the intermediate engaging portion of the folding rollers 1 and 1. At the same time, the next cutting is performed.
The folding blade 25 is fixed to a folding shaft 25 a incorporated in the folding cylinder 5, and enters and exits from the circumferential surface of the folding cylinder 5 at a predetermined rotational phase position of the folding cylinder 5. As a result, the web 3 wound around the folding cylinder 5 immediately below the folding cylinder 5 is pushed between the pair of folding rollers 1 and 1 by the folding blade 25 and folded in half from the center thereof. .

As shown in FIG. 6, the folding rollers 1, 1 are meshed with gears 12, 12 provided at the ends of their shafts. An intermediate gear 10 is interposed between one of the gears 12 and 12 and the drive gear 13 of the folding cylinder 5, so that the folding rollers 1 and 1 rotate synchronously with the rotation of the drive gear 13. .
The web 3 pushed directly under the folding cylinder 5 by the folding blade 25 is nipped by the folding rollers 1 and 1 and transversely folded at right angles to the flow direction of the web 3, as shown in FIG. It is transferred to the impeller 7. The impeller 7 has a function of sequentially receiving the signatures 6 transferred through the folding rollers 1 and 1 and arranging them on the paper discharge conveyor 26 at a predetermined pitch.

By the way, as described above, the leading end of the web 3 conveyed while being stabbed by the needle 24 is released from the needle 24 after once passing over the folding rollers 1 and 1. Therefore, after that, when the center of the web 3 is pushed by the folding blade 25, the leading end of the web 3 is pulled back toward the folding rollers 1 and 1 and tends to flutter. When the front end of the web 3 flutters, the web 3 may be folded or wrinkled. In this case, since the web 3 with folds and wrinkles is wound around the folding rollers 1 and 1, the folded book 6 with end folds and wrinkles is discharged from the folding rollers 1 and 1.
Further, when the transfer start timing of the web 3 is delayed due to the uncertainty of the web 3 being held by the folding rollers 1, 1, the end of the next folding book 6 collides with the rear part of the folding book 6. As the number of folds increases, the folding posture becomes distorted.

  Not only newspaper rotary presses but also various types of folding machines used for other rotary presses, folding rollers that form folding books in cooperation with folding cylinders are used. appear. In order to cope with this problem, various shapes of folding rollers have been proposed.

  The folding rollers 1 and 1 shown in FIG. 7 (a) are formed by cutting out part of the outer peripheral surface as shown in FIG. 7 (b), which is a sectional view taken along the line BB of FIG. 7 (a). The rear free end of the fold 6 is engaged with the notch 1a. According to the folding rollers 1 and 1, the repulsion due to the fluttering of the rear free end can be alleviated and the end folding of the folding 6 can be suppressed.

  On the other hand, the folding rollers 1 and 1 shown in FIG. 8 (a) are axially formed on a part of the outer peripheral surface thereof as shown in FIG. 8 (b), which is a DD sectional view of FIG. 8 (a). The projecting portions 1b and 1b are formed along the same direction, and the projecting portions 1b and 1b are rotationally driven so as to press and hold the lateral (horizontal) fold portion of the fold 6. According to the folding rollers 1 and 1, the holding force of the web 3 is increased.

  However, in the actual operation, the behavior of the web 3 changes depending on the page (the number of the webs 3), the operation speed, the paper type, the rigidity, the adjustment values during operation such as the clearance between the folding rollers 1 and 1, and the like. The transfer timing of the folding book 6 by the folding rollers 1 and 1 also changes. For this reason, the notch 1a or the protrusion 1b of the folding rollers 1 and 1 has a deviation in the operation timing of the protrusion 1b and the transfer timing of the folding book 6, and the notch 1a or the protrusion 1b cannot sufficiently perform its function. Sometimes.

  As a countermeasure for avoiding such inconvenience, a method of widening the circumferential range of the notch 1a or the protruding portion 1b of the folding rollers 1 and 1 to cover the timing deviation is conceivable. Then, since the other cylindrical surface (serration portion) is reduced, there is a possibility that the transfer delay due to insufficient clamping force of the folding rollers 1 and 1 may be increased.

  Therefore, at present, the operation timing of the notch 1a or the protrusion 1b of the folding rollers 1 and 1 is set under the conditions with the highest printing frequency, and when the operating conditions change, an inspection check is performed to check for defective paper (folder 6). It corresponds by the method of sorting. However, this method places a burden on the operator.

  The present invention has been made in view of such a situation, and provides a folding device capable of suppressing the occurrence of defective paper (folded paper) such as edge folds and wrinkles, especially during high-speed operation. It is an object.

  The present invention comprises a folding blade that pushes out a web signature in cooperation with the rotational movement of the folding cylinder, and a pair of folding rollers into which the signatures pushed into the folding blade are pushed, A folding device of a rotary press in which the behavior of the folding book fluctuates due to changes in operating conditions such as paper type, rigidity, gaps in the folding roller, etc., and the behavior of the folding book changes during the operation of the rotary press A phase adjusting means for adjusting a rotation phase of the folding roller with respect to a pushing timing of the folding blade pushed out in accordance with rotation of the folding cylinder, and the rotation phase of the folding roller by the phase adjusting means is adjusted. It is characterized by correcting the shift of the folding roller with respect to the holding timing and transfer timing of the folding book by adjustment.

The phase adjusting means is configured to adjust the rotation phase of the folding roller with respect to the pushing timing of the folding blade pushed out according to the rotation of the folding cylinder to a preset target rotation phase corresponding to the operating condition. Can be given.
The phase adjustment means may include target rotation phase adjustment means for adjusting the target rotation phase under the current operating conditions. Further, the phase adjusting means can comprise means for updating the target rotational phase to the target rotational phase adjusted by the target rotational phase adjusting means.

  The present invention also comprises a folding blade that pushes out the web signature in cooperation with the rotational movement of the folding cylinder, and a pair of folding rollers into which the signatures pushed out by the folding blade are pushed, A rotary press equipped with a folding device in which the behavior of the folding book fluctuates due to changes in operating conditions such as paper type, rigidity, and clearance of the folding roller, and the behavior of the folding book in response to changes in the operating conditions. Phase adjustment means for presetting a plurality of target rotational phase values corresponding to the above, the phase adjustment means with respect to the timing at which the folding blade is pushed along the target rotational phase value that is preset according to the increase or decrease of the operating speed. The amount of delay in the rotation phase of the folding roller is adjusted.

  According to the folding device of the rotary press according to the present invention, the phase adjusting means for adjusting the rotation phase of the folding roller with respect to the rotation of the folding cylinder is provided, so that the folding of the folding roller with respect to the folding book and the deviation of the transfer timing are corrected Thus, it is possible to form a high quality origami without edge breaks and wrinkles.

  FIG. 1 is a conceptual diagram of a main part showing an embodiment of a folding machine of a rotary press according to the present invention, and FIG. 2 is a ZZ sectional view of FIG. In these drawings, the same elements as those shown in FIGS. 5 to 8 are denoted by the same reference numerals.

  In FIG. 1 and FIG. 2, gears 12, 12 that mesh with each other are attached to the rotary shaft 14 of the folding rollers 1, 1, and the folding gear 13 attached to one of these gears 12 and the folding cylinder 5. Intermediate gears 10-1 to 10-4 are interposed between the two. Therefore, as the folding gear 13 rotates, the folding rollers 1 and 1 rotate at different speeds in different directions.

The rotational speed of the folding rollers 1 and 1 is set so as to have a predetermined relationship with the rotational speed of the folding cylinder 5. That is, when the folding cylinder 5 has a double cylinder configuration having a circumference twice as long as the length of the folding book 6 to be described later, the number of rotations of the folding rollers 1 and 1 is usually (the number of rotations of the folding cylinder 5) × When the folding cylinder 5 has a triple cylinder configuration, the same rotational speed is set to (the rotational speed of the folding cylinder 5) × (3 or 6).
As a result, the relationship between the continuously formed folding book and the circumferential position of the folding rollers 1 and 1 can be always kept in the same state.

As shown in FIG. 3, the intermediate gears 10-1 to 10-4 and the gear 12 are all helical gears. The intermediate gears 10-2 and 10-3 are integrally coupled, and the torsion angles of the respective teeth are different. Here, the torsion angles of the gears _10-2 and _10-3 are β _10-2 and −β _10-3 , the axial movement adjustment amount is x, the module is m, and the gears 10-2, 10-3 and 10− When the number of teeth of 4 and 12 is Z _10-2 , Z _10-3 , Z _10-4 and Z ₁₂ , the gear 10 when the gears 10-2 and 10-3 are moved by x in the axial direction. The circumferential rotation distances P _10-2 and P _10-3 of ₋₂ , _10-3 are respectively
P _10-2 = xtan β _10-2 (1)
P _10-3 = xtan β _10-3 (2)
In addition, the phase change (rotation angle (radian)) of the folding rollers 1 and 1 is
(2P _10-2 / mZ _10-2 ) (Z _10-3 / Z ₁₂ ) + (2P _10-3 / mZ ₁₂ ) (3)
It is expressed as

The intermediate gears 10-2 and 10-3 are rotatably supported by the support shaft 28 via the bearings of the movable bearing 27. One end portion of the screw shaft 29 supported by the bearing in the bearing 30 is screwed into one end portion of the movable bearing 27. Since the power of the reduction motor 32 is transmitted to the screw shaft 29 via the bevel gear 31, when the motor 32 is driven to rotate the screw shaft 29, the support shaft 28 is moved to the intermediate gear 10-2, It is moved in the axial direction together with 10-3. Therefore, the axial movement adjustment amount x shown in FIG. 3 can be changed by driving the motor 32.
The potentiometer 33 is provided to electrically detect the rotational position of the screw shaft 29, that is, the rotational phase of the folding rollers 1 and 1.

Hereinafter, the operation of the folding device according to this embodiment will be described.
The web 3 shown in FIG. 6 cut by the saw cylinder 4 and the folding cylinder 5 is conveyed while being folded by the folding rollers 1, 1, and is fed into the impeller 7 shown in FIG.
By the way, since the behavior of the web 3 changes when the building conditions (number of the webs 3), the operation speed, the paper type, the rigidity, the clearance between the folding rollers 1 and 1, and the like change, the folding roller 1 , 1, the holding timing of the signature 6 and the transfer timing also change. This change in timing lowers the function of the notch 1a or protrusion 1b (see FIGS. 7 and 8) of the folding rollers 1 and 1.

  However, according to the above embodiment, the circumferential phase of the folding rollers 1 and 1 is changed by driving the motor 32 shown in FIG. 2 and moving the intermediate gears 10-2 and 10-3 in the thrust direction. Therefore, the operation timing of the notch 1a or the protrusion 1b (see FIGS. 7 and 8) can be adapted to the transfer timing of the signature 6.

That is, when the folding 6 is pinched due to the change in the operating condition, and the transfer timing is shifted, it is possible to adjust the rotation phase of the folding rollers 1 and 1 in response to the shift. It is possible to eliminate edge folding, wrinkles, folding quality defects, and the like of the signature 6 due to the timing deviation. For this reason, it becomes possible to produce and discharge the high-quality origami 6 without reducing the printing speed.
In addition, the rotational phase of the folding rollers 1 and 1 can be optimally adjusted to pinch the folding book 6 and ensure and stabilize the transfer, preventing paper jams and paper discharge disturbances even during high-speed operation. Thus, productivity can be greatly improved.

The rotational phase of the folding rollers 1 and 1 can be adjusted by manually displacing the movable bearing 27 in the axial direction, but this adjustment can also be automated.
In this case, the controller 40 shown in FIG. 2 receives the operating conditions such as the building page, the operating speed, the paper type, and the gap between the folding rollers 1 and 1 from a host computer not shown. For example, the controller 40 presets the relationship between each of the above operating conditions and the target rotational phase of the folding rollers 1 and 1 corresponding thereto, and reads out the target rotational phase value corresponding to the operating condition information from the memory, The motor 32 is controlled so that the rotational phase of the folding rollers 1 and 1 becomes the read target rotational phase value. In this control, the actual rotational phase value of the folding rollers 1, 1 detected by the potentiometer 33 is fed back to the controller 40.

  The relationship between the operation condition stored in the memory and the target phase value (delay amount) can be obtained in advance by simulation, experiment, etc. FIG. 4 shows an example of this relationship.

  As described above, if the phase adjustment of the folding rollers 1 and 1 is automated, the phase adjustment of the folding rollers 1 and 1 corresponding to the change is automatically executed even when the various operating conditions change from moment to moment. Therefore, the work load on the operator is greatly reduced, and the quality and productivity of the printed matter are further improved.

By the way, as a result of the quality check of the signature, it may be determined that it is better to change the target rotational phase value under the current operating conditions. Therefore, the controller 40 is provided with means for finely adjusting the target rotational phase value under the current operating conditions. If this target rotational phase value fine adjustment means is provided, the target rotational phase value under the current operating conditions can be set to a more appropriate value to further improve the quality of the signature.
The controller 40 also includes means for updating the initially preset target rotational phase value with the finely adjusted rotational phase value. If the initially preset target rotational phase value is updated by this updating means, operation with a more appropriate target rotational phase value becomes possible, and the quality of the signature is further improved.

It is a conceptual diagram which shows the power transmission system of the folding roller in the folding machine of the rotary press which concerns on this invention. It is ZZ sectional drawing of FIG. It is a conceptual diagram which shows the relationship between the axial direction moving amount | distance of the intermediate gear which comprises the power transmission system of a folding roller, and a circumference rotation distance. It is the graph which illustrated the relationship between an operating condition and the phase correction value of a folding roller. It is the conceptual diagram which illustrated the basic composition of the folding machine of the rotary press. It is an enlarged view which shows the effect | action of a folding cylinder, a saw cylinder, and a folding roller. The folding roller provided with the notch is shown, (a) is a side view, and (b) is a BB section of (a). The folding roller provided with the protrusion part is shown, (a) is a side view, (b) is a DD cut section of (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Folding roller 1a Notch 1b Projection part 2 Folding machine 3 Web 4 Saw cylinder 5 Folding cylinder 6 Folding book 7 Impeller 10-1 to 10-4 Intermediate gear 12 Folding roller gear 13 Folding cylinder gear 16 Paper discharge device 17 Drag roller 18 Triangular plate 19 Lead-in roller 20 Nipping roller 21 Saw base 22 Saw blade 23 Saw blade receiver 24 Needle 25 Folding blade 26 Discharge conveyor 27 Movable bearing 28 Support shaft 29 Screw shaft 30 Bearing 31 Bevel gear 32 Deceleration motor 33 Potentiometer 40 Controller

Claims (5)

Triangular plate that folds the web that is continuously conveyed from the printing device side of the previous process after printing and folds along the traveling direction,
A lead-in roller disposed below the triangular plate and sandwiching and rotating the web;
A nipping roller disposed below the lead-in roller and sandwiching and rotating the web;
A saw body in which a saw blade is arranged along the axial direction on the outer peripheral surface;
A pair of saw blade receivers having a function as a receiving member of the saw blade is attached along the axial direction, and the needle is pierced at the leading end of the web and can move in and out by a rotating operation. And a folding cylinder having a folding blade that acts to fold the vicinity of the center of the web cut by the saw blade,
The web is fed between the saw cylinder and the folding cylinder by the lead-in roller and the nipping roller,
The saw cylinder and the folding cylinder rotate synchronously, and the web that is fed and conveyed between them is cut by engagement of the saw blade and the saw blade receiver to form a folded book,
When the central part of the folding book approaches the upper position of the pair of folding rollers by the rotational transfer by the folding cylinder, the folding book is pushed into the intermediate engaging part of each folding roller by the folding blade, and two from the center. Configured to be folded,
Each folding roller is configured to be folded during a certain period of one rotation,
Furthermore, phase adjusting means is provided for adjusting the rotation phase of the folding roller with respect to the pushing timing of the folding blade pushed out according to the rotation of the folding cylinder,
The phase adjusting means has a configuration for adjusting the rotation phase of the folding roller with respect to the pushing timing of the folding blade so as to be a target phase value preset corresponding to an operation condition including at least an operation speed,
It is configured so as to correct the shift of the folding roller with respect to the holding timing and transfer timing of the folding book by adjusting the rotational phase of the folding roller by the phase adjusting means,
The folding book pushed down by the folding blade below the folding cylinder is sandwiched by the folding roller and folded horizontally at right angles to the flow direction, and then transferred to the impeller.
The rotary apparatus for a rotary press, wherein the impeller has a function of sequentially receiving the transferred signatures and arranging the folding lengths on a discharge conveyor at a predetermined pitch.   The rotary device for a rotary press according to claim 1, wherein the phase adjusting means includes target rotational phase adjusting means for adjusting the target rotational phase under current operating conditions.   3. The rotary press folding apparatus according to claim 2, wherein the phase adjusting means includes means for updating the target rotational phase to a target rotational phase adjusted by the target rotational phase adjusting means.   The rotary device for a rotary press according to claim 1, wherein the operating condition includes not only the operating speed but also a building page, a paper type, and a gap between the folding rollers. A rotary press having a printing device and a folding device, wherein the folding device is
A triangular plate that folds the web that is continuously conveyed from the printing apparatus side after finishing printing along its running direction;
A lead-in roller disposed below the triangular plate and sandwiching and rotating the web;
A nipping roller disposed below the lead-in roller and sandwiching and rotating the web;
A saw body in which a saw blade is arranged along the axial direction on the outer peripheral surface;
A pair of saw blade receivers having a function as a receiving member for the saw blade is attached along the axial direction, and the needle is pierced at the leading end of the web and can be moved in and out by a rotating operation. And a folding cylinder having a folding blade that acts to fold the vicinity of the center of the web cut by the saw blade,
The web is fed between the saw cylinder and the folding cylinder by the lead-in roller and the nipping roller,
The saw cylinder and the folding cylinder rotate synchronously, and the web that is fed and conveyed between them is cut by engagement of the saw blade and the saw blade receiver to form a folded book,
When the central part of the folding book approaches the upper position of the pair of folding rollers by the rotational transfer by the folding cylinder, the folding book is pushed into the intermediate engaging part of each folding roller by the folding blade, and two from the center. Configured to be folded,
Each of the folding rollers is configured to perform a folding operation in a certain period during one rotation,
Furthermore, in order to respond to the behavior change of the folding book in the folding device based on the change of the driving speed, a phase adjusting means for presetting a plurality of target rotation phase values corresponding to the change of the driving speed is provided,
The phase adjusting means is configured to adjust a delay amount of the rotational phase of the folding roller with respect to the timing of pushing the folding blade along the target rotational phase value set in advance according to increase / decrease of the operation speed,
The folding book pushed down by the folding blade below the folding cylinder is sandwiched by the folding roller and folded horizontally at right angles to the flow direction, and then transferred to the impeller.
The impeller has a function of sequentially receiving the transferred signatures and arranging the folding lengths on a discharge conveyor at a predetermined pitch.

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