DE102008025393B4 - Sheet guiding device - Google Patents

Abstract

Sheet guiding device for a transfer cylinder (1), comprising:
- a blow box (2), and
a guide plate (3) which covers the blow box (2) towards that transfer cylinder (1) and forms a sheet guide surface (F) facing the sheet travel path,
- Wherein the guide plate (3) of the blow box (2) is removable and the blow box (2) is so integrated into the printing press, that this about a parallel to the rotation axis (X) of the transfer cylinder (1) extending tilting axis (K) is pivotable .
wherein in each case an insertion guide (4) is formed in both side regions of the blow box, in which the side edge region of the guide plate (3) can be inserted, characterized
- That a stop structure (7) is provided for fixing the insertion depth of the baffle in the insertion path,
- That the stop structure (7) is designed as a stop wall against which abuts a transverse edge region (QK1) of the baffle,
- That a holding device is provided for holding the guide plate (3) in the insertion position and
- That the holding device comprises a recess (8) into which the guide plate snaps by its inherent elasticity.

Description

The invention relates to a sheet guiding device for a transfer cylinder, which serves as such to guide each taken on the part of a transfer cylinder and in the context of the rotation of the transfer cylinder towed by this, so that a sufficiently stable sheet travel is achieved.

Out DE 201 20 426 U1 a sheet guiding device is known, which comprises a plurality of transfer cylinders, wherein the run of the sheet is supported by sheet guiding means extending below the respective transfer cylinder. The sheet guiding device has a guide surface which can be removed from a flow channel in a pivoting position.

From the DE 201 01 835 U1 a sheet guiding device for a rotary printing machine is known. The sheet guide device has a guide surface mounted in guides on a flow channel, which can be moved out of the guides in a position on the flow channel in the transverse direction. The contour of the guideway of the sheet guiding device is changed as needed.

From the DE 199 14 178 A1 is a sheet guiding device in a sheet-fed printing machine known. The sheet guiding device contains a sheet guiding path which can be composed of three separate sheet guiding elements. The sheet guiding elements are used on end guide elements via a guideway on the sheet guiding device to form the sheet guiding path.

Sheet guiding devices of the aforementioned type are typically designed as blow boxes which comprise a sheet guide path facing and correspondingly concavely curved sheet guiding plate. In this sheet guide plate perforations may be introduced which act as tuyeres and support the arc run via the corresponding distributed and directionally deflated air flow. In the case of these sheet guiding devices, there is the problem that due to their positioning underneath the transfer cylinders, they are only conditionally accessible to configuration changes or cleaning treatments.

Object of the invention

The invention has for its object to provide solutions by which it is possible under little time a configuration change of a transfer cylinder associated sheet guiding device, or at least perform a cleaning of the same.

Inventive solution

• - einem Blaskasten, und
• - einem Leitblech das den Blaskasten zu jenem Transferzylinder hin abdeckt und eine dem Bogenlaufpfad zugewandte Bogenführungsfläche bildet,
• - wobei das Leitblech von dem Blaskasten abnehmbar ist und
• - der Blaskasten derart in die Druckmaschine eingebunden ist, dass dieser um eine parallel zur Rotationsachse des Transferzylinders verlaufende Kippachse schwenkbar ist, und
• - wobei in beiden Seitenbereichen des Blaskastens jeweils eine Einschubführung ausgebildet ist in welche der Seitenrandbereich des Leitblechs einschiebbar ist,
• - wobei eine Anschlagstruktur vorgesehen ist, zur Festlegung der Einschubtief des Leitblechs in die Einschubbahn,
• - wobei die Anschlagstruktur als Anschalgwand ausgeführt ist an welche ein Querkantenbereich des Leitblechs ansschlägt,
• - wobei eine Halteeinrichtung vorgesehen ist, zum Halten des Leitblechs in Einschubstellung und
• - wobei die Halteeinrichtung eine Vertiefung umfasst in welche das Leitblech durch seine Eigenelastizität einschnappt.

This object is achieved by a sheet guiding device for a transfer cylinder, with:

• - a blow box, and
• a baffle covering the blow box to that transfer cylinder and forming a sheet guide path facing the sheet travel path,
• - Wherein the baffle is removable from the blow box and
• - The blow box is integrated into the printing press such that it is pivotable about a parallel to the axis of rotation of the transfer cylinder tilting axis, and
• wherein in each case an insertion guide is formed in both side regions of the blow box into which the side edge region of the guide plate can be inserted,
• wherein a stop structure is provided for fixing the insertion depth of the guide plate in the insertion path,
• - Wherein the stop structure is designed as Anschalgwand to which a transverse edge region of the baffle suggests,
• - Wherein a holding device is provided, for holding the guide plate in the insertion position and
• - Wherein the holding device comprises a recess into which the baffle snaps by its inherent elasticity.

This advantageously makes it possible to provide a sheet guiding device for a transfer cylinder in which the baffle covering the blow box for the transfer cylinder can advantageously be pulled upwards out of the printing press or inserted again from above into the printing press. This concept makes it possible, in particular, to clean possibly contaminated baffles within extremely short machine downtimes, or also to install guide baffles for the respective print job whose guiding characteristic is adapted to the properties of the corresponding printing material and / or job to be processed.

The insertion guide according to the invention can be designed in an advantageous manner as equipped with guide rollers insertion groove. This insertion groove is preferably dimensioned such that the guide plate can be pushed into it with sufficient ease. The respective insertion path is preferably constructed such that it is concave toward the axis of rotation of the printing machine has a curved course. The course preferably corresponds empirically or computationally determined advantageous paths.

To determine the end position of a transverse edge of the baffle, an end stop is also provided. This end stop can be designed as a support bracket, or as a receiving groove so that it is stiffened by support, or Aufgriff the transverse edge portion of the baffle this in the transverse direction.

To hold the baffle in the insertion position, a holding device is further provided. This holding device can be designed so that it forms a transverse edge under which the baffle can deflect due to its inherent elasticity. Alternatively, or in combination with this measure, the holding device may also comprise a claw displaceable in the insertion direction via which the guide plate is pressed into the end stop position. About this claw both a tensioning of the baffle on the roller guide, as well as a locking of the baffle in the working position accomplished.

The baffle which is supported as such by the insertion guide and held by the transverse edge and the end stop, can be designed as a flexible, possibly slightly bulged sheet steel element or optionally as otherwise flexible plate member, in particular of a composite material. Furthermore, profiles and transverse reinforcement beads can also be formed on the baffle.

The possibly formed in the baffle blast nozzle openings may be formed as pure openings, or in combination with beading or Einmuldungen. The blowing nozzles can also be formed by small insert elements which are attached to the baffle.

The insertion guide carrying the baffle forms according to a particularly preferred embodiment of the invention part of a side cheek of the blow box. This side cheek can be designed so that an anchoring of the blow box in the printing machine is accomplished by this. This anchoring can be accomplished by bayonet-type engagement structures. In this case, it is particularly possible to make the latching of the blow box via pin elements which at the same time form the pivot axes for the pivotally movable mounting of the box. Alternatively, it is also possible to provide the insertion guide by otherwise frame side tethered structures and lift the blow box from below to the fixed baffle.

The inventive concept makes it possible to create a sheet guide which extends over the entire sheet guiding length under the transfer conveyor. For easy cleaning, the upper sheet guide plate of the sheet guiding boxes can be removed. The sheet guide plate can be used or equipped with other punching holes or nozzles to achieve other sheet guiding properties. The sheet guide plate can also be covered with felt stiffeners outside the machine for film printing. The sheet guide box unit according to the invention is arranged pivotable about a pivot point. As a result, the access between the impression cylinder and Transferter for inserting or removing the sheet is made possible. The side panels of the sheet guide boxes are each provided with an upper continuous guide and below the same arranged rollers. At least at the beginning of the guide fixed guide bridges are installed between the first rollers.

The sheet metal is locked by automatically inserting the sheet into a recess at the radius transition and thus arrested by the stretching behavior of the sheet.

The insertion guide, in particular the roller conveyor provided by this, is preferably designed such that it gives the guide plate the required concave curvature with elastic deformation thereof.

list of figures

• 1 eine Schemadarstellung zur Veranschaulichung des Aufbaus einer erfindungsgemäßen Bogenleiteinrichtung in einem Zustand mit eingeschwenktem Blaskasten und eingeschobenem Bogenleitblech;
• 2 eine Schemadarstellung zur Veranschaulichung des Aufbaus einer erfindungsgemäßen Bogenleiteinrichtung in einem Zustand mit aufgeklapptem Blaskasten, und noch nicht eingeschobenem Leitblech.

Further details and features of the invention will become apparent from the following description taken in conjunction with the drawings. It shows:

• 1 a schematic representation to illustrate the construction of a sheet guiding device according to the invention in a state with swung-in blow box and inserted sheet guide plate;
• 2 a schematic representation to illustrate the structure of a sheet guiding device according to the invention in a state with unfolded blow box, and not yet inserted baffle.

Detailed description of the figures

In the 1 The sheet guiding device illustrated in a greatly simplified manner in an operating position serves as support for sheet travel via a transfer cylinder 1 ,

The sheet guiding device according to the invention comprises a sheet guiding or blowing box 2 and a baffle 3 that the blow box 2 to that transfer cylinder 1 covers and forms a sheet running path facing sheet guiding surface F.

The baffle 3 is so involved in the sheet guiding device that this if necessary from the blow box 2 is removable. The blow box 2 in turn, is integrated into the printing press such that it is parallel to the axis of rotation X of the transfer cylinder 1 extending tilt axis K is pivotable.

In the sheet guiding device shown here is an insertion guide 4 provided over which the baffle 3 in the illustrated here, concave to the axis of rotation X curved leadership position is sicherbarbar. The insertion guide 4 is formed such that it forms a roller track acting as a support structure over which the baffle 3 under a given, to the axis of rotation X concave curvature smoothly in the insertion guide 4 is insertable.

In the embodiment shown here, the insertion guide 4 through the side cheeks of the blow box 2 provided. The insertion guide 4 is designed as a plug-in track. The insertion guide 4 points to the required curvature of the baffle 3 matched elliptical or parabolic segment-like curvature.

The fixation of the baffle 3 done by a firm stop 7 which provides an abutment wall and over this the Quererkantebbereich QK1 of the inserted baffle 3 determines and possibly supports. Through this stop wall continues to be the blow box 2 sufficiently sealed.

In the area of the second transverse edge area QK2 of the baffle 3 covered section of the blow box 2 is at this a recess 8th (please refer 2 ) formed the another stop wall 8a provides which the inserted baffle 3 secures in this insert position. The baffle 3 springs in this embodiment by its inherent elasticity in this depression 8th into it and is secured by it. It is also possible to provide other, or more safety devices around the baffle 3 to hold in this position.

The insertion guide 4 includes a cover strip 4a and a roller conveyor 4b , The roller conveyor 4b In turn, several successively arranged in the insertion direction, rotatably mounted insertion rollers 4c as well as guide bridges 4d extending between these slots 4c extend. The guide bridges can be formed by a structural component which also includes the holder of the insertion rollers 4c takes over. This structural component may in particular be made of a plastic material with pronounced slide bearing properties, such as, for example, PTFE or NYLON or PEEK, on a chip-removing manner from a solid material. Instead of the formation of the guide rollers as substantially cylindrical elements, it is also possible to accomplish the smooth guidance by other rolling elements, in particular also correspondingly shaped balls.

In 2 is the bow guide device according to the invention in a state with unfolded blow box 2 dargstellt. The blow box 2 is here about the tilt axis K tilted so that the right in this illustration area of the blow box 2 in between the transfer cylinder 1 and the upstream pressure cylinder DZ defined gap, in particular in the web space of the transfer cylinder 1 protrudes.

In the position shown here is the baffle 3 not yet on the blow box 2 postponed. Will the baffle 3 now inserted into the machine, so it initially moves along the insertion guide 4 , Once the rear cross edge QK1 the end stop 7 reached snaps the front transverse edge QK2 into the depression 8th on. The transverse wall 8a this depression secures the baffle 3 in this inserted position. In this position, the baffle sets 3 to the roller conveyor 4b and receives the required spatial curvature.

If necessary, further guide structures can be provided on the machine side, which are the insertion of the guide plate 3 in the slot guide 4 support, so that a largely tilt-free insertion of the baffle 3 is possible.

The sheet guiding device according to the invention can be designed so that, if necessary, the blow box 2 can be taken up from the printing press. At the printing press, and preferably also in the blow box 2 can continue to be formed guide structures as such the insertion of the baffle in the insertion guide 4 , as well as the insertion of the baffle 3 against the attack 7 support.

The inventive concept makes it possible to use the blow box 2 and the associated baffle 3 such that this essentially the entire, lower sheet running area below the transfer cylinder 1 covers. By the inventive concept, it is possible in particular, the blow box 2 covering sheet baffle 3 in a simple way from the respective blow box 2 to decrease. The sheet guide plate 3 can be changed or - to achieve other sheet guiding properties - be equipped with a different hole or nozzle arrangement. Furthermore, it is also possible, the discharged Bogenleitblech3, for example, for the development of a film printing outside of the printing press with felt strips or other guide elements to glue.

In the sheet guide device according to the invention, the blow box unit is a total of a pivot point K arranged pivotally. As a result, the access between the impression cylinder and the Transferter for inserting or removing the sheet 3 allows.

The side panels of the sheet guiding boxes are inventively each with a designed as a roller conveyor insertion guide 4 Provided. The locking of the sheet guide plate 3 takes place without special security effort automatically by snapping the sheet guide 3 in a blaskastenseitig provided recess.

Claims (6)

Sheet guiding device for a transfer cylinder (1), comprising: - a blow box (2), - a guide plate (3) covering the blow box (2) to that transfer cylinder (1) and forming a sheet guide surface (F) facing the sheet travel path, wherein the baffle (3) of the blow box (2) is removable and the blow box (2) is so incorporated into the printing press, that this about a parallel to the axis of rotation (X) of the transfer cylinder (1) extending tilting axis (K) is pivotable, in which in each case an insertion guide (4) is formed in both side regions of the blow box into which the side edge region of the guide plate (3) can be inserted, characterized in that - a stop structure (7) is provided for determining the insertion depth of the guide plate into the insertion path; - That the stop structure (7) is designed as a stop wall against which abuts a transverse edge region (QK1) of the baffle, - that a holding device is provided for holding d it baffle (3) in the insertion position and - that the holding device comprises a recess (8) into which the baffle snaps by its inherent elasticity. Sheet guiding device according to Claim 1 , characterized in that on the recess (8), a locking of the guide plate (3) is accomplished. Sheet guiding device according to at least one of Claims 1 to 2 , characterized in that the respective insertion guide (4) forms part of a insertion path designed as insertion slot. Sheet guiding device according to Claim 3 , characterized in that the respective insertion path has a concave curve towards the axis of rotation (X) of the printing machine. Sheet guiding device according to at least one of Claims 1 to 4 , characterized in that the respective insertion guide (4) comprises a roller conveyor with a plurality of successively arranged in the insertion direction rollers (4c). Sheet guiding device according to Claim 5 , characterized in that at least in the initial region of the insertion guide (4) guide bridges (4d) are provided, which bridge the gap between two successive rollers (4c) to form a guide surface.

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