JP2009023843A - Gripper system for sheet printing press - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a novel mounting method of a gripper system for a sheet printing press. <P>SOLUTION: The gripper system comprises a plurality of grippers having one carriage type grip, one gripper finger and one gripper opening/closing unit, mounted in the carriage type grip, and separated with a space from each other. The gripper system is capable of maintaining the gripper finger in an open state for drawing or releasing a sheet, or in a closed state for fixing the gripped sheet. Each one bearing surface is provided on the gripper opening/closing unit. The gripper system is characterized in that a plurality of gripper actuator devices are mounted in each carriage type grip, and each gripper actuator device is capable of individually operating the grippers. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a gripper system for a sheet printing machine for transporting a sheet-form substrate to be printed in at least a part of the entire sheet traveling path on which each sheet is traveling. The invention relates in particular to a gripper system implemented as a chain or tooth belt and connected to a traction means circulating in a closed traction mechanism path by means of which the substrate is transferred between printing devices or The sheet is conveyed to the sheet discharge area in the area after the printing press.

  From Japanese Patent Application Laid-Open No. 2004-228561, a sheet discharge device for a sheet-fed printing machine having a gripper chain device to which a plurality of gripper systems are attached at equal intervals is known. Via the respective gripper system, the fed sheets from the pre-printing device pass through the drying station and are guided to the powdering station. The travel path of the gripper / chain device is fixed by a gripper / chain guide, and the gripper / chain guide is typically provided with a plurality of turning zones. The spacing of these turning zones can be wide enough so that the sheets guided along the gripper system path can be fully spread out step by step.

On page 466 of Non-Patent Document 1, non-stop discharge of a sheet guided through a gripper chain device is possible, and a plurality of grippers attached to one gripper chain are provided. A paper discharge device comprising the system is described.
German utility model registration No. 20313394 specification “Offset printing technology” by Helmut Teschner (“Offsetdrucktechnik“, Helmut Teschner, 1989, Fachschriften-Verlag GmbH; ISBN 3-921217-14-8)

  It is an object of the present invention to provide a solution that shows advantages over conventional configurations with respect to the mechanical operating behavior of the gripper system and in particular with respect to the mounting space required by the gripper system.

This problem is solved according to the invention by a gripper system for adding a sheet-form substrate and transporting the substrate on a sheet-running web. The gripper system
-One carriage mold,
-A plurality of grippers spaced apart from each other mounted in a carriage-type gripper and having one grip finger and one gripper opening / closing portion, the gripper fingers pulling in or releasing the sheet; Can be opened and closed to secure the added sheet, and a gripper opening / closing portion provides a seating surface,
The gripper system is characterized in that each carriage mold is provided with a plurality of gripper-actuator devices which can be operated individually.

  It is therefore preferable to realize a gripper system for a sheet processing machine, in particular a sheet discharge device for a sheet press, which has a very flat structure and a light weight compared to conventional gripper systems. Can do. Thereby, it is also possible to reduce the generation of air vortices in the area of the carriage-type mouth. Furthermore, the dryer and the powdering device can be brought closer to the sheet. Furthermore, in some cases, it is possible to eliminate parts such as the gripper release cam and its actuator. The concept of the present invention allows the lamp when the gripper is opened to remain unchanged regardless of when it is opened. In addition, the so-called “piano effect” that occurs in conventional gripper systems can be advantageously avoided. The setting cost of the gripper is also reduced.

  The gripper actuator device can be configured so that the grippers mounted in each carriage-type retainer can be open or closed individually or in a given group.

  The gripper system can be configured to assign one actuator to each gripper finger. In this case, the actuator can be configured to adapt the actuation force generated by the actuator only to the actuation force required for the individual gripper fingers, thereby realizing a relatively small and very rigid actuator.

  In a special embodiment of the invention, the carriage-type mouth is preferably constructed in a flat structure. This flat structure is made in particular of an aluminum extrusion material or other hollow material that exhibits high rigidity even at relatively low weight. The carriage-type mouth is perpendicular to the track, i.e. flat or sharp so that its height measured perpendicular to the track is approximately equivalent to the chain width measured in the same manner perpendicular to the track of the carriage-type mouth. Can be configured. Carriage-type retainers can also be made from plastic metal composites reinforced with highly rigid light metals, especially fiber-reinforced plastic materials, especially carbon fibers, Kevlar® fibers, and aramid® fibers. It is.

  According to a special aspect of the invention, the gripper actuator device comprises an electromechanical actuator. This electromechanical actuator can be realized in particular under the influence of an electromagnet. Alternatively or in combination with this means, the electromechanical actuator can be realized incorporating a piezoelectric or crystal structure, which provides the necessary adjustment distance in a piezoelectric manner. Can do. In order to achieve a large lift stroke, a plurality of piezoelectric elements can be arranged in rows.

  The gripper actuator device of the present invention can also be realized by a pneumatic actuator, particularly a control cylinder or a membrane cylinder.

  The actuator operating energy is preferably supplied while avoiding load changes in the gripper / lead chain. When the actuator device is realized as an electromechanical actuator, the actuator operating energy can be supplied inductively or possibly in a sliding contact structure.

  A switch device is attached to each carriage-type mouth, which controls the individual grippers of the respective gripper system using signal technology methods and tunes or synchronizes with the machine operation with high accuracy in time. Is possible. Thus, on the one hand, the respective energy supply of the actuators is ensured in the area of the carriage-type mouth, and on the other hand, the operation of these actuators is controlled by a specific control which is connected to the area of the carriage-type mouth via an interface device. It is possible to make it dependent on the signal. This interface device can be arranged such that when the gripper is in a position important for operation, the interface device is in a position that allows signal transmission to a switch device mounted in the carriage-type mouth. Such an interface device is typically arranged in an area for adding sheets and an area for discharging sheets. It is also possible to arrange a corresponding interface device for allowing the gripper to open in the special position in the web part suitable for removing the proof. The control of the actuator can be performed by a control device directly present in the area of the paper discharge device or the control box provided for driving the paper discharge device. It is also possible to control the actuator from the machine control panel. These actuators can be controlled such that the actuators can be controlled at least by an emergency switch suitable for emergency operation with no damage, and the emergency switch is, for example, a carriage-type mouth, The gripper of the present invention is opened when it comes to the last position where the added sheet can be discharged without friction.

  The actuator can be controlled based on the measurement of the sheet lateral edge position. Thereby, it is possible to perform particularly accurate ejection by controlling the actuator of the present invention taking into account the gripper system captured for each sheet of paper. According to the concept of the present invention, it is possible to realize a slat-type paper discharge or a parcel-type paper discharge in the paper discharge device area. In this case, the paper discharge by each method is performed according to the present invention. It can be realized simply by controlling the carriage-type mouth or the electromechanically operated actuator attached to it by means of a corresponding signaling technique.

  Further details and features of the invention are described below with reference to the figures.

  FIG. 1 is a diagram showing a greatly simplified last area of a sheet discharge device of a sheet-fed printing machine. The paper discharge device is provided with a plurality of carriage-type retainers 1 which are attached to the gripper chain and thereby can be moved along the gripper chain path in a known manner.

  A plurality of grippers are attached to each carriage-type gripper 1, and the grippers each include a gripper finger 4 and a gripper opening / closing portion 5, and the gripper fingers take in the sheet B, Alternatively, it can be opened for release, and a seating surface K is provided by the gripper opening / closing part 5 at that time, and the sheet B to be gripped is placed on the seating surface K, respectively. It can be pinched. As a feature of the gripper fingers of the present invention, one or a plurality of gripper actuator devices 6 are mounted in each carriage-type gripper 1, and each of the gripper actuator devices 6 has an assigned gripper 3 attached to the gripper. -It is mentioned that it is comprised so that it can be individually actuated by an actuator. Unlike the illustrated embodiment, the gripper finger kinematic guide is configured so that the sheet is not pressed.

  In the embodiment shown in the figure, the gripper / actuator device 6 can open the gripper mounted in the carriage-type gripper 1 for each given group via the gripper / actuator device. It is configured. The gripper system shown in the figure is controlled by an operating device 7 that communicates with the gripper track. In this embodiment, the operating device 7 is implemented as a coil system including a plurality of coil cores 8, and the windings assigned to the coil cores 8 can be controlled via the control unit C. . Via this coil device 8, it is possible to supply the operation energy necessary for the operation of the gripper mounted in the carriage type holder 1 by an inductive or electromagnetic method.

  In the embodiment shown in the figure, the actuator 6 mounted in the carriage-type gripper 1 is controlled by the control device C so that the sheet B held by the carriage-type gripper is provided in advance in terms of programming technology. It is performed so as to be opened at the discharge position. A detection device 9 is provided to synchronize the control device 7 with the circulation of the carriage-type gripper 1, and the position of the carriage-type gripper 1 or particularly the position of the front edge of the sheet B is detected via the detection device 9. can do. Further, the rotational phase position of the paper discharge device at that time or the traveling position of the carriage type holder 1 can be detected via the signal pickup device 10. When the carriage-type gripper 1 is in the respective discharge position in the area of the control device 7, the gripper mounted in the carriage-type gripper 1 is opened accordingly via this control device. The overall control of the paper discharge device provided with the actuator integrated in the carriage-type mouth 1 shown here can be further coordinated from the machine control station L.

  FIG. 2 shows a very simplified example of the structure of the gripper system of the present invention. The gripper system is provided with a carriage-type mouth 1 having gripper fingers 4 attached freely. In the example shown in the figure, the gripper finger 4 is attached using a shaft 12, and the gripper finger 4 is supported by the carriage type grip 1 so as to be swingable by the shaft 12. The gripper finger 4 is closed by being pressed by a spring device 13 shown in a simplified manner in this drawing, and in this closed state, the tip region 4a of the gripper finger is respectively added to the sheet. The leaf paper is sandwiched between the scissors surface K provided by the opening / closing part 5. The gripper system shown in the figure is opened when the coil device 14 arranged immediately adjacent to the traveling path of the carriage-type mouth 1 is controlled by the control device C. The magnetic field produced by the coil device 14 magnetizes the yoke device 15 suggested in this figure, so that the gripper fingers 4 partially accommodated in the yoke device 15 are provided by the spring device 13. It enters the yoke device 15 against the initial tension. In the magnetized state thus generated, the gripper 3 is opened, and the sheet sandwiched between the scissors surface K is transferred to a given sheet between the gripper finger tip region 4a and the opening / closing part 5. The paper can be pulled out from the scissor area. A similar operating device is preferably arranged in the region of the holding position. The gripper system is operated mechanically, for example, in the web section provided to hold the sheet, and the release of the sheet from the gripper system is controlled by an actuator. It can be configured to be controllable even by a conventional mechanical method. In this way, by sending out the sheets by actuator control, the time point at which the gripper system is opened for each specific quantity of sheets is determined accordingly, and different delivery positions are set, so that a special delivery position is set in the discharge area. Sheet pile, especially sukono or parcel delivery.

  The gripper system of the present invention is particularly suitable for receiving sheets from the last printing device or varnish device and transporting the sheets through a delivery device to a delivery. The gripper then provides the holding force necessary for the sheet transport. For this purpose, the grippers are attached to the actuators, preferably a plurality of similar actuators arranged in a distributed manner over the length of the respective carriage-type retainer. These actuators are controlled to open and close the gripper. According to the concept of the present invention, the height of the carriage-type gripper can be realized very small. Thereby, it is possible to prevent the drying and powdering processes from being adversely affected by the turbulent flow when the sheet is conveyed in the paper discharge device. By directly controlling the grippers directly via the actuators, it is possible to eliminate the gripper shaft, which has heretofore been usual, so that a greater degree of structural freedom is obtained. The structural height of the system can be reduced. Furthermore, the dryer and the powdering device can be brought closer to the sheet. Furthermore, parts such as the gripper release cam and its actuator can be eliminated. When opening the gripper, a constant lamp is possible regardless of the point of opening. Furthermore, the “piano effect” caused by twisting of the gripper shaft when the gripper is opened is also eliminated. Periodic gripper setting costs can also be avoided. Vibration can also be avoided. The grippers in the carriage-type gripper are opened individually or in groups via actuators (eg due to piezoelectric effects, magnetic, mechanical, air). The energy for these actuators is brought into the gripper system by the dielectric principle, sliding contact, energy storage devices (accumulators, capacitors, air accumulators).

  Carriage type gripper or its gripper mechanism should be applied to the specific part of the carriage type carrier path, especially the sheet receiving area. A guide structure or support structure may be provided to support as done. Such a guide structure can be implemented in particular as a turning slide guide or a guide roll. It is also possible to implement the guide structure or the support structure as a support roller to which a support finger protruding in the radial direction is attached, and the support finger supports the carriage type retainer in the radial direction in the sheet delivery region. At this time, it preferably enters the storage portion provided in the carriage mold.

1 is a perspective view for illustrating a basic concept of the gripper system of the present invention when used, for example, in a sheet discharge device region; FIG. FIG. 6 is a cross-sectional view for illustrating the structure of the gripper system of the present invention including a gripper operable by an external coil device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Carriage type holder 2 Gripper chain 3 Gripper 4 Gripper finger 4a Gripper finger tip area 5 Gripper opening / closing part 6 Gripper / actuator device 7 Operating device 8 Coil core 9 Detection device 10 Signal pickup device 12 Shaft 13 Spring device 14 Coil Device 15 Yoke device B Sheet C Control unit K Seat surface, scissor surface L Machine control station

Claims (18)

A gripper system for adding a sheet-shaped substrate and for conveying the substrate along a sheet running web,
-One carriage mold,
-Having a plurality of grippers spaced apart from each other, with one gripper finger and one gripper opening and closing, mounted in the carriage mold;
The gripper fingers can be open to retract or release the sheet and closed to secure the added sheet;
-One seating surface is provided by each of the gripper closures;
In the gripper system,
One or more gripper actuator devices are mounted in each carriage type mouth,
The gripper-actuator device is configured such that one assigned gripper can be individually operated by the gripper-actuator device.
A gripper system characterized by that.   The gripper system of claim 1, wherein the gripper actuator device is configured to allow a gripper mounted in a carriage-type gripper to be opened for a given group.   2. A gripper system according to claim 1, wherein one actuator is assigned to each gripper finger.   The gripper system according to any one of claims 1 to 3, wherein the carriage-type retainer is configured as a flat structure.   The carriage-type retainer is configured to be flat so that the height of the carriage-type retainer measured perpendicular to the track corresponds approximately to the chain width measured in the same manner perpendicular to the track of the carriage-type retainer. The gripper system according to any one of claims 1 to 4, characterized in that:   6. A gripper system according to any one of claims 1 to 5, characterized in that the gripper actuator device comprises one electromechanical actuator.   7. A gripper system according to claim 6, characterized in that the electromechanical actuator comprises one electromagnet.   6. A gripper system according to any one of the preceding claims, characterized in that the electromechanical actuator comprises one piezoelectric structure for generating a gripper operating force in a piezoelectric manner.   6. A gripper system according to any one of the preceding claims, characterized in that the gripper actuator device comprises a pneumatic actuator.   The gripper system according to any one of claims 1 to 9, wherein the actuator operating energy is supplied while avoiding load fluctuations in the gripper lead chain.   The gripper system according to any one of claims 1 to 8, characterized in that the supply of actuator operating energy is performed inductively.   The gripper system according to any one of claims 1 to 8, wherein the actuator operating energy is supplied by a plurality of sliding contact structures.   The gripper system according to any one of claims 1 to 3, characterized in that the actuator operating energy is supplied by a single sliding contact device.   14. A switch device is mounted in each carriage mold retainer for controlling an actuator mounted in the carriage mold retainer. The gripper system described in 1.   The transmission of the corresponding control signal to the switch device is performed by an interface device arranged in a position that enables signal transmission to the switch device when the gripper comes to an important position for operation. The gripper system according to any one of claims 1 to 14.   16. A gripper system according to any one of the preceding claims, characterized in that the actuator is controlled from a single machine console.   The gripper system according to any one of claims 1 to 16, wherein the actuator is controlled while measuring the sheet lateral edge position.   The gripper fingers according to any one of claims 1 to 17, characterized in that the gripper fingers are controllable for each finger group, for example a group of two fingers or a group of three fingers. system.

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