JP2009023349A - Gripper system for sheet-fed printing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the movement behavior of sheets in such a manner that the sheets can be guided through a drying and/or chalking station in the state of stabilizing the sheets while the sheets clamped by the gripper system are conveyed along a region extending in a straight line form longer than the other of a gripper track. <P>SOLUTION: The system is provided with a plurality of actuation means capable of imparting the vertical deviation defined from one sideways straight line passing through the terminal points on both right and left sides of the lateral sides of the sheets to the regions of the lateral sides of the sheets gripped by the gripper system. Thereby advantageously, the forcible curling of the sheets is made possible in at least the prescribed sections of the sheet guide track through which the sheets pass. The gripper system of the sheet-fed printing machine configured in such a manner that stiffness is given to the sheets by the curling is obtained. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a gripper nail system for transporting a sheet-like printed material for a sheet-fed printing press. Here, the present invention aims at the substrate to be printed in an area after the printing unit, in particular connected to a revolving chain / belt drive means implemented as an endless chain or toothed belt. A gripper nail system used to transport through a drying and / or choking station to a delivery pile area.

  From Patent Document 1, a plurality of gripper claw systems are connected to a gripper claw chain device at equal intervals, and have a closed gripper claw chain device that circulates together. The paper discharge device is known. Each gripper system allows the sheet picked up from the last printing unit to be guided through the drying station and the choking station. The orbit of the gripper chain device is typically defined by a gripper chain guide having a plurality of turning zones. The distance between these turning zones may be sized so that the sheet guided along the gripper claw system travel path can be fully extended for each phase.

  From Japanese Patent Application Laid-Open No. 2004-228561, a guide plate device is known that enables detection of an occasional flutter of a sheet held by the gripper system. If a fluttering effect is detected, this can be taken into account through adjustment of the supplied blast air.

Lastly, Non-Patent Document 1 describes a sheet squeezing device, which includes a suction slot extending laterally with respect to the sheet moving direction. The sheet that is formed as a take-off device and moves on it is sucked into the suction slot. With this measure, it is possible to stabilize the movement of the sheet and at the same time remove the vertical wrinkles of the printed material.
German utility model registration No. 20313394 specification German registered patent No. 102005024992 Helmut Teschner, Offsetdrucktechnik, 1989, Fachschriften-Verlag GmbH; ISBN 3-921217-14-8, p.468

  The present invention provides a sheet of paper that is gripped by the gripper nail system in a stable state, such as drying and / or transporting, especially along a linearly extending region that is longer than the rest of the gripper track. Alternatively, it is an object to improve the movement behavior of the sheet so that it can be guided through the choking station.

According to the present invention, there is provided a gripper nail system for carrying a sheet-like printed material and carrying the printed material along a sheet moving path according to the present invention,
-One gripper carriage coupled to one gripper chain device;
-A plurality of gripper claw fingers and a gripper claw contact portion, which are incorporated in the gripper carriage and arranged transversely with respect to the moving direction of the sheet and spaced from each other; A gripper claw finger, and the gripper finger moves between an open state for holding and releasing the sheet and a closed state for fixing the held sheet. In the gripper system, which is possible and each gripper nail abutment is provided with a respective support surface,
-The gripper nail system is provided with a plurality of actuating means, so that it passes through the end points on the left and right sides of this side of the sheet into the area of the side of the sheet that is held by the gripper nail system. This is solved by a gripper system that stands out in that it can provide a defined vertical deviation from the horizontal line of the book.

  This advantageously allows the sheet to be forcibly warped at least in a predetermined section of the sheet guide path through which the sheet passes, and this warping causes the sheet to be A gripper nail system for a sheet-fed printing press can be obtained which gives a waist. Due to this warpage, in the simplest case, a simple warp bulging vertically upward and downward with respect to the main plane of the sheet may be formed. In addition, the sheet may be given a waist by a plurality of “vertical folds” by forcibly undulating the sheet multiple times. In this case, the sheet tension adjustment stroke performed in the region on the side of the sandwiched sheet is preferably in the range of 10 to less than 15 mil meters.

  In a highly preferred embodiment of the present invention, the sheet is set according to the present invention by setting the deviation of the lateral sides of the sandwiched sheets from the aforementioned horizontal straight line only temporarily. Waist applied to the paper is provided only in predetermined, typically relatively straight sections of the sheet travel trajectory. In particular, according to the present invention, the waist imparted to the sheet by twisting the tension on the side of the sheet is brought about in the area where the sheet moves through the drying and / or choking station. It is good to make it. If the sheet is to be guided further through the sheet weaving device, the lateral side produced by slightly adjusting the position of the gripper nail abutment according to the invention. By removing the twisting of the sheet again, the sheet slides over the corresponding slot of the sheet wetting device in the absence of wrinkles, in which case it can slip into this slot. It is good to do so. Due to the bulging of the lateral side of the sheet, the lateral side of the sheet should be somewhat to the left and right to avoid any unacceptable tension in the lateral region. The gripper nails are preferably configured so that the lateral sides are gripped by the respective gripper nails.

  In another highly preferred embodiment of the present invention, a plurality of actuating means provided in accordance with the present invention can change the relative position of each gripper abutment with respect to the gripper carriage carrying it. As is the case, the claw system is configured. The gripper fingers may be configured to be elastic so that they allow a change in the position of the gripper contact portion. However, the gripper finger also has an actuating structure according to the invention so that the position of the gripper abutment is changed without causing an unacceptable change in the sheet clamping force in the region of the gripper finger. It is preferable to be incorporated in

  In accordance with the present invention, the plurality of actuating means provided for displacement of the gripper abutment are in particular also a plurality of actuators which are integrated as actuators in the gripper system and are adapted to move therewith. It may be realized by being included in these. Particularly in this case, these actuators may be configured as piezo actuators that provide the required operating stroke by changing the volume of the crystal by applying a voltage. Alternatively or alternatively, in combination with this measure, these actuators incorporated in the gripper system according to the invention may also be implemented with magnet structures, in particular electromagnets. Besides, these actuators may be implemented as actuating means that are actuated pneumatically or hydraulically. Instead of the actuators and actuating means that are fully integrated in each orbiting claw system, the claw system is extended towards the orbital space through which the claw system passes, and the corresponding companion elements of the claw system are The gripper claw abutment proposed by the present invention by means of a plurality of guide devices, in particular cam structures, which, when activated, result in the undulation of the lateral sides of the gripped sheet being carried out according to the present invention. A change in the position of the part may be brought about.

  The operation control of these operating means is preferably performed such that at least one bulge extending perpendicularly to the movement trajectory of the gripper carriage is given to the lateral side of the sheet. This swelling may be performed so that the sheet swells upward or downward. In addition, the movement control of the plurality of gripping nails of the gripping nail system may be performed so that a waved or wavy structure appears on the substrate to be gripped by these gripping nails.

  According to the present invention, the displacement of each gripper claw abutting portion proposed for undulating the lateral sides of the sheet is caused by a predetermined trajectory region, particularly the sheet moving trajectory extending substantially linearly. However, it is preferable that the adjustment is made with respect to each other in terms of time or in relation to a predetermined section of the gripper nail trajectory, so that the sheet is given a waist. When it is evaluated that the movement behavior of the sheet is unsatisfactory, particularly when the flutter of the substrate is confirmed by a sensor incorporated in the printing press, the actuator proposed by the present invention is not used. It is preferable to use an operation control method.

  The operation control of each actuator may be performed directly from one input unit provided in the area of the paper discharge device or the paper supply device, or preferably indirectly from the control station of the printing press. Appropriate setting values for the gripper nail displacement are stored for a specific print job, and when the print request is repeated, it is recommended that the setting values of the printing press be directly reset. .

  Other details and features of the invention will become apparent from the following description of the drawings.

  The gripper carriage 1 shown in FIG. 1 is incorporated in a way known per se into the gripper chain system 2 which is only suggested and illustrated here, in particular the last printing of the printing press. It is used for transporting the sheet 3 from the exit area of the unit and transporting the sheet to the discharge pile area. The gripper carriage 1 is provided with a plurality of grippers 4 that are spaced from each other.

  Each of these gripping nails 4 has one gripping finger finger 5 and one gripping nail abutment 6, as is apparent from the view shown in FIG. 3, particularly as further described below. The gripper finger 5 can be moved into an open state in which the sheet that must be gripped can be gripped into the gripper system or the sheet that must now be ejected can be released. It has become.

  Each of these gripper nail fingers 5 cooperates with the gripper nail abutting part 6, but the gripper nail abutting part 6 is provided with a single support surface K, and the sheet of paper that is held Is tensioned by a claw finger 5 on this surface.

  The gripper nail system shown here is a single sideways connection that connects the points Q1 and P2 at the corners on both sides of this side of the sheet 3 to the area Q on the side of the sheet that was gripped by the gripper nail system. It is outstanding in that it is provided with a plurality of actuating means that can provide a defined deviation from the straight line g.

  The movement control of the individual gripper nails 4 of the gripper nail system 1 is applied to the sheet of paper by creating a “waving” that can be recognized as that of the sheet B, and by forming multiple vertical folds accordingly. It is preferably done in such a way that the hips to be effected only temporarily, i.e. only in certain sections of the sheet travel trajectory. If this is not the case, the sheet B will be added in a substantially straight state, and as a result the sheet will be wrinkled in the area other than the path area where the waist is given. The sheet may be bent around an axis X extending in a direction transverse to the moving direction BLR of the leaf paper.

  In the embodiment shown here, the sheet B has two longitudinal folds W1, W3 swelled upward, and one vertical fold W2 swelled downward between them. The side Q on the side of the paper B is sandwiched. This concept achieves a very effective vertical waist that is temporarily applied to the sheet B in a predetermined section of the sheet movement path of the sheet discharge device.

  FIG. 2 shows a conventional gripper system, in which the sheet B is held in a straight extension at the area Q on the front side. In the sheet B stretched over the sheet B, as suggested here, a plurality of waves extending in a direction transverse to the sheet moving direction BLR are formed, and the sheet B flutters. .

  FIG. 3 shows a preferred structure of a gripper system according to the present invention. This gripper system here has a gripper carriage rail 10 which is produced here from a profile extrusion molding, in which a plurality of gripper fingers 5 are arranged one after the other in the longitudinal direction. The gripper shaft 11 is pivotably supported. These gripping claw fingers 5 together with the gripping claw contact portion 6 form one clamping gap K so that a sheet to be conveyed can be held and fixed there. In the embodiment shown here, this gripper nail abutment is fitted on one actuating means 12, which is here implemented as a piezo actuator. Each gripper may be configured such that they can be actuated either individually or in groups by actuators, one for each gripper or group of grippers. In particular, the gripper claw may be configured such that each gripper finger, together with the gripper claw abutting portion combined therewith, is displaceable as a grip module that causes the paper edge to shift. The operation control of this module may be performed by one corresponding actuator, which is preferably implemented as a very rugged servo motor. In particular, the entire gripper module may be displaced by a plurality of suitable adjusting devices / actuators. These actuators may be implemented as electromechanical and / or hydraulic or pneumatic and in particular as piezo actuators.

  This actuating means 12 makes it possible to change the position of the clamping gap K by the defined method by the dimension s suggested here. As a result, a certain amount of undulation is imparted to the lateral side of the sheet to be transported, which is stretched between adjacent gripping fingers 5, thereby giving the sheet a waist. . The operation control of the actuating means 12 implemented as a piezo actuator is performed via a single power circuit 13. The power circuit 13 is provided here with a single sliding contact 14 as a specific example, and this and a single slide rail element 15 provide voltage supply and corresponding operation control. Yes. The power control device 13 incorporates a single control electronics that can provide a corresponding adjustment of the actuating means 12 with a single signal modulated according to the supply voltage.

  In addition, instead of the embodiment described here, the change of the position of the holding gap K may be realized by another mechanism. In accordance with the present invention, each gripper may be adjusted in height independently from each other by an actuator so that the sheet has a stiff shape in the direction of movement of the sheet. Good. This reduces sheet guidance problems and ensures better manageability of the sheet.

  Each gripper of the gripper carriage can be independently adjusted in height independently from each other via an actuator (for example, by piezoelectric effect, electromagnetic, mechanical, pneumatic). For this purpose, the energy is input to the gripper claw system, for example, by the induction principle, sliding contact, energy storage (accumulator, condenser, pneumatic pressure accumulator). Alternatively, energy may be supplied via a chain drive system, for example by a chain sprocket or a chain rail.

FIG. 4 is a sketch for explaining the waist imparted to a sheet according to the present invention by adding the sheet with a gripping nail system according to the present invention. It is explanatory drawing of the sheet added by the conventional system. Provided with a plurality of actuating means capable of imparting a defined deviation from a single horizontal straight line to the region of the lateral side of the sheet of paper held by the gripper nail system constructed in accordance with the present invention FIG. 3 is a transverse cross-sectional view of the gripper nail system produced.

Explanation of symbols

1 Claw carriage
2 Nail chain system
Three sheets of paper
4 claw
5 Mouth finger
6 Mouth claw contact part
10 Claw carriage rail
11 Mouth axis
12 Actuation means
13 Power circuit / Power control device
14 Sliding contact
15 Slide rail elements
B Sheet / Substrate
BLR sheet travel direction
K support surface / clamping surface / clamping gap
P1 corner point
P2 corner point
Q Side area of the sheet
W1 vertical fold
W2 vertical folds
W3 vertical folds
g Horizontal straight line
s Working stroke
x axis

Claims (15)

A gripper nail system for carrying the printed material (B) along the sheet moving path, including the sheet-shaped printed material (B),
One gripper carriage (1) connected to one gripper chain device (2);
A gripper claw finger (5) and a gripper claw contact portion (6), which are incorporated in the gripper claw carriage (1) and are spaced apart from each other in a direction transverse to the moving direction of the sheet. A plurality of gripping nails having one by one,
Each gripper finger (5) can move between an open state for holding and releasing the sheet (B) and a closed state for fixing the held sheet (B). In addition, in the gripper nail system in which each one gripping surface (K) is provided by each gripper nail contact portion,
A lateral direction (Q) of the lateral side of the sheet paper held by the gripping nail system, and a single lateral direction passing through the end points (P1, P2) on both sides of the lateral side of the sheet (B). A gripper system comprising a plurality of actuating means capable of providing a defined vertical deviation (s) from a straight line (g) of   2. The gripper nail system according to claim 1, wherein the setting of the vertical deviation is temporarily performed for only one predetermined section of the sheet moving path.   The vertical deviation to be imparted can be provided by changing a holding position of each gripper claw, and each gripper claw can be adjusted independently of each other. The claw system according to 1 or 2.   4. The gripper nail system according to claim 1, wherein the position adjustment of each gripper is performed for each group of grippers.   2. The relative position of each gripper claw contact portion with respect to the gripper claw carriage (1) carrying each gripper claw contact portion can be changed by each operating means. The gripper nail system according to any one of items 1 to 4.   6. The actuator according to claim 1, wherein each actuating means is constituted by a plurality of actuators (6) which are incorporated in the gripper claw system and move together therewith. Mouth claw system.   7. Each actuating means cooperates with a plurality of guide elements, in particular cam structures, that are fed into a track space through which the gripper system passes. Nail claw system.   The operation control of each actuating means is performed such that at least one warp extending in the vertical direction bulging vertically upward or downward with respect to the moving surface of the gripper carriage is given to the lateral side of the sheet. The gripper nail system according to any one of claims 1 to 7, characterized in that it is performed.   In the gripper nail system, the operation control of each actuating means is executed so that a corrugated or wavy contour shape (W1, W2, W3) giving waist in the vertical direction is generated in the gripped substrate (B). The gripper nail system according to any one of claims 1 to 8, characterized in that:   The displacement of each gripper nail abutment in terms of time or of the gripper nail trajectory is such that the waist is given only at the track region where the sheet travel trajectory extends substantially linearly. 10. The claw system according to claim 1, wherein the claw system is performed while being adjusted with respect to each other in association with a predetermined section.   In order to prevent an unacceptable tension from being generated at the end of the paper as a result of the lateral sides of the sheet being stretched, the holding structure configured to include the gripper fingers on both the left and right sides is prevented. 11. The gripper nail system according to any one of claims 1 to 10, characterized in that gripper fingers at least near the edge of the paper are connected so that displacement is possible.   12. Each gripper finger close to the edge of the paper is axially displaceable so that the sheet can be waved or waved. Mouth claw system as described in. A gripper nail system for adding a sheet-like printed material and carrying the printed material along a sheet moving path,
A single claw rail connected to a single claw chain device;
A plurality of gripping nails, each having a gripping finger and a gripping nail abutting portion, which are incorporated in the gripping rail and are spaced apart from each other in a direction transverse to the moving direction of the sheet. And
Each gripper finger is capable of transitioning between an open state for holding and releasing a sheet and a closed state for fixing the gripped sheet. In the gripper nail system in which each support surface is provided by a contact part,
A defined vertical deviation from a single horizontal straight line passing through the end points on the left and right sides of this side of the sheet in the area of the side of the front side of the sheet held by the gripper system A sheet edge bend-tacking device is provided, whereby the sheet is provided with at least one bulge, with a wave crest extending in the direction of movement of the sheet. A unique nail system.   A plurality of actuating means are provided in the area of one abutting rail, whereby the area of the lateral side of the sheet extending between two adjacent gripping finger abutting surfaces can be warped. The holding nail system according to claim 13.   The contact rail is provided with a single recess, and the recess is provided with a plurality of retracting means for drawing the portion of the side of the side of the sheet into the recess. 14. A claw system according to claim 13.

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