JP3085869U - Sheet ejection device for sheet ejection machines - Google Patents

Abstract

PROBLEM TO BE SOLVED: To minimize the side facing the discharge direction or the opposite direction without using a vibrating stopper for the rear end of a sheet to be discharged and stacked on a pile. Make a flat pile accurately. SOLUTION: A stopper surface 12.1 assigned to the leading end of the sheet is divided into an alignment surface area 12 'and a receiving surface area 12''which continues upward.
The receiving surface area 12 ″ is disposed downstream of the alignment surface area 12 ′ in the discharge direction.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The invention provides a pile station in which the sheets are fed in the discharge direction to form the pile, and a stopper surface which allows the leading and trailing edges of the sheets to be aligned on the pile in the discharge direction. The present invention relates to a sheet discharging machine having a configured stopper, and particularly to a sheet discharging device for a printing press.

[0002]

[Prior art]

 Such a delivery device is known from DE 39 23 475 C2.

[0003] There is usually a requirement to form a smooth pile with a flat side, which is assigned on the one hand to the leading edge of the sheet and, on the other hand, to the trailing edge of the sheet. It is assumed that the mutual spacing of the stopper surfaces of the stoppers is adjusted according to the corresponding length of the sheet to be ejected. Such adjustments are usually made in the case of known paper-delivery devices by means of a carriage in which a stop which can be pivoted laterally in the direction of discharge is pivotally connected for the rear end of the sheet to be discharged in each case. Is performed by a corresponding horizontal movement. The stop, which is assigned to the leading end, is arranged on a fixedly mounted shaft, which is usually aligned by means of this shaft (and by a corresponding drive acting on this shaft) and at a position which is more inclined than this aligned position. The stopper surfaces of these stoppers are vertical when they are in the aligned position, and abut against the side surface of the pile downstream in the discharge direction.

[0004] The stoppers assigned to the rear ends of the discharged sheets respectively perform a horizontal vibration between the alignment position and the position pushed away from the alignment position during operation. When in the aligned position, it abuts against the side of the pile that is upstream in the discharge direction.

[0005] The strategy of applying an oscillating motion as described above to the stopper for the trailing edge of the sheet to be ejected is obviously to make the side faces of the pile facing upstream and downstream as accurate as possible. This is done to make the structure flat.

[0006]

[Problems to be solved by the invention]

 However, this requires a special configuration of stoppers that can be adjusted to the format of the sheet to be ejected, and to slow down the ejected sheet (as in the case of known ejection devices). This requires a braking device, a carriage for supporting a stop for the rear end of the sheet, and a further drive with a corresponding actuator.

The object of the present invention is to provide a pile as flat as possible with its side facing in or out of the discharge direction without using a vibrating stopper for the rear end of the sheet to be discharged. The object of the present invention is to provide the paper ejection device described at the beginning.

[0008]

[Means for Solving the Problems]

 To this end, according to the present invention, the stopper surface assigned to the leading end is divided into an alignment surface area and a receiving surface area, and the receiving surface area is provided in an upper area of the stopper surface. It is located downstream of the alignment surface area in the discharge direction.

This creates a sheet-falling space above the pile, which extends beyond the contour of the pile in the discharge direction and is delimited by a stop surface. The sheet-falling space is directed downwards in the discharge direction or in the opposite direction, with the alignment area of the stopper assigned to the leading edge of the sheet and the alignment surface of the stopper assigned to the rear edge. And into a sheet pile space separated by and. In the preferred embodiment, the length of the sheet pile space in the discharge direction exactly corresponds to the corresponding length of the sheets forming the pile.

[0010] With respect to the sheet pile space, the sheet falling space, which extends beyond it in the discharge direction, forms a sheet moving on the flight trajectory towards the receiving surface area and onto the pile. Each sheet provides the space necessary for a smooth descent, so each sheet can be created if the descending sheet is given only sheet pile space, especially behind it. The edge does not stay on the top surface of the stopper assigned to the rear edge.

[0011]

[Embodiment of the invention]

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

The section shown in FIG. 1 of a web-fed printing press for processing sheets includes a delivery device 1 following the last processing unit. Such a processing unit may be a printing unit or a post-processing unit such as, for example, a varnishing unit. In the present example, this last processing unit is a printing unit 2 having an impression cylinder 2.1 and operating in an offset printing method. The impression cylinder 2.1 urges each sheet 3 in the processing direction indicated by the rotational direction arrow 5 in an impression cylinder 2.1 and a rubber blanket cylinder 2.2 cooperating with the impression cylinder 2.1. To guide it through the printing gap between it and the paper sheet 3, which is subsequently arranged on the impression cylinder 2.1, at the leading edge of the sheet 3. Open the gripper provided to the chain transfer device 4. The chain transport device 4 includes two endless transport chains 6 that circulate in operation along each side wall of the paper discharge device 1. Each conveyor chain 6 is wound around a respective one of two synchronously driven drive sprocket wheels 7 whose rotation axes are aligned with one another, and in this example opposite the drive sprocket wheel 7. Then, they are guided along one guide sprocket wheel 8 on the upstream side in the processing direction. Between the two transport chains 6 are carried and carried by them, the impression cylinders 2. 1 is passed through the gap between the grippers arranged at 1 and, in this case, each sheet 3 is moved immediately before the gripper arranged at the impression cylinder 2.1 opens, at the preceding grip of the leading end of this sheet 3. The sheet 3 is gripped and received, the sheet 3 is conveyed over the sheet guide 10 to the sheet brake 11 and the sheet 3 is transferred to the sheet brake 11 at that location. The gripper device 9 is provided with a gripper 9.1 which opens for the purpose. The sheet braking device 11 sets the sheet 3 at a discharge speed that is slower than the processing speed, and after the sheet 3 reaches the discharge speed, the sheet braking unit 11 As a result, each sheet 3 which has already been decelerated finally strikes the leading edge stop 12 assigned at the pile station 14 to the leading edge of the sheet, respectively, and this leading edge The stoppers 12 and the trailing edge stoppers 13 which are respectively assigned to the rear ends of the stoppers 12 are aligned and can be lowered by the lifting unit together with the preceding sheet 3 and / or the succeeding sheet 3 by an increased amount. The pile 14.1 is formed. FIG. 1 shows only a paper platform 15 for supporting the pile 14.1 and a lifting chain 16 for supporting the paper platform 15 as indicated by a dashed line.

The transport chain 6 is guided by a chain guide rail along the path between one drive sprocket wheel 7 and the other guide sprocket wheel 8, so that the chain guide rail runs on the chain of the inter-sprocket chain part. The route is prescribed. In this example, the sheet 3 is conveyed by the lower inter-sprocket chain portion in FIG. The portion of the chain path through which the chain between the sprockets runs extends along the inner side of the sheet plan 17 formed in the sheet guide device 10 facing it. Between the sheet guide surface 17 and each sheet 3 guided on this sheet guide surface 17, it is preferred that a support-carrying air cushion is formed during operation. In addition, the sheet guide device 10 is provided with a blowing air nozzle which communicates with a sheet guide surface 17 and which is represented only schematically in FIG. ing.

In order to prevent the printed sheets 3 from sticking together in the pile 14, a dryer is provided on the path of the sheets 3 from the drive sprocket wheel 7 to the sheet brake 11. 19 and a dusting device 20 are provided.

In order to prevent the sheet guide surface 17 from being excessively heated by the dryer 19, the sheet guide device 10 is provided with a coolant, as shown in FIG. A coolant circuit, schematically indicated by an inlet pipe 21 and an outlet pipe 22 connected to the container 23, is incorporated.

The leading edge stopper 12 and the trailing edge stopper 13 are arranged side by side with respect to the discharge direction with a space between them. The leading edge stopper 12 is non-rotatably connected to a rotatable stopper shaft 25 so as to reciprocate between two rotational positions in a manner not shown. In this case, the leading edge stopper 12 is shown in FIG. At the first of these rotational positions, it is in the aligned position and alternately occupies both rotational positions at a constant clock frequency.

The leading edge stopper 12 and the trailing edge stopper 13 constitute a flat surface area facing the pile 14.1 that serves as a reference for aligning the sheets forming the pile 14.1. . In the case of the trailing edge stop 13, this area of the surface is at least composed of sheets 14. 1 while they are stacked in succession, and in the simplest case they are stationary, with the side of the pile 14.1 facing the stop surface 13.1. It is the stopper surface 13.1 which is preferably in contact.

In the case of the leading edge stopper 12, the aforementioned flat surface area is also vertical when the leading edge stopper 12 is in the aforementioned aligned position and faces the leading edge stopper 12 of the pile 14.1. Preferably, there is an alignment surface area 12 ′ configured in the lower region of the leading edge stopper 12, which preferably contacts the side surface that is facing.

The side of the pile 14.1 facing the stop surface 13.1 is the stop surface 13.1 and the side of the pile 14.1 facing the alignment surface area 12 '. Advantageously, as described above, respectively, with this alignment surface area 12 ′, assures that these sides are configured particularly flat. Such contact will cause each of the sheets on the flight trajectory in the direction towards the leading edge stopper 12 to have a sheet extending beyond the pile 14.1 downstream in the direction of flight (corresponding to the discharge direction). This is made possible by the provision of a drop space 26, which can be formed by the sheet 3 being sandwiched between the respective stopper surfaces or by the rear edge of the sheet. The sheet 3 can be received without the area lying on the rear end stopper 13.

The sheet-falling space 26 is arranged in the upper region in the discharge direction and in the opposite direction, in the above-mentioned alignment surface area 12 ′ of the leading edge stopper 12 and in the above-mentioned stopper surface 13. 1 and above the sheet pile space 27 bounded by the sheet pile space 27.

The leading edge stopper 12 assigned to the leading end of the sheet 3 constitutes a stopper surface 12.1 which is divided into the aforementioned alignment surface area 12 ′ and the receiving surface area 12 ″. The receiving surface area 12 ″ is above the alignment surface area 12 ′ and continues to the alignment surface area 12 ′, and is located downstream of the sheet discharge space 26 in the discharge direction. It constitutes a partition and for that purpose is arranged downstream of the aforementioned alignment surface area 12 '. The partition of the sheet-falling space 26, which is located upstream, is advantageously constituted by a trailing-edge stop 13 which, as described above, stands upright at least during the continuous formation of the pile. Is constituted by the provided stopper surface 13.1. The upper and / or lower end of each stop surface 13.1 of the trailing edge stopper 13 and the lower end of the alignment surface area 12 'of the leading edge stopper 12 are preferably piled, respectively. Followed by a surface area which is inclined or curved away from 14.1 and which of the surface areas follows the lower end, whatever the pile 14.1 is for any reason. When lowered below the leading edge stopper 12 and the trailing edge stopper 13 and then again up to the level of formation of the pile upper surface, the upper area of the pile 14.1 has the alignment surface area 12 'and the stopper surface 13'. . This allows the upper region to sink without damage into the sheet pile space located between the two.

The receiving surface area 12 ″, in an advantageous embodiment, is initially inclined away from the pile 14.1 in the area immediately following the respective alignment surface area 12 ′, or the pile 14. 1. , And then extend vertically. The transition between the receiving surface area 12 '' and the alignment surface area 12 'is continuous in one advantageous embodiment, while in other embodiments the alignment surface area 12' and the receiving surface Section 12 '' meets at the bend.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating an area including a sheet discharge device of a rotary printing press that processes a sheet, together with a pile station provided in the sheet discharge device.

FIG. 2 is a part II of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Paper discharge device 2 Printing unit 2.1 Impression cylinder 3 Sheets 4 Chain transport device 5 Rotation direction arrow 6 Transport chain 7 Drive sprocket wheel 8 Guide sprocket wheel 9 Gripper device 9.1 Gripper device 10 Sheet guide device Reference Signs List 11 braking / supporting device 12 leading edge stopper 12 'alignment surface area 12' 'receiving surface area 13 trailing edge stopper 13.1 stopper surface 14.1 pile 15 paper platform 16 elevating chain 17 sheet guide surface 18 connecting pipe 19 Dryer 20 Powdering device 21 Inlet tube 22 Outlet tube 23 Coolant container 25 Stopper shaft 26 Sheet falling space 27 Sheet pile space

 ──────────────────────────────────────────────────の Continuation of the front page (73) Utility model holder 390009232 Kurfuersten-Anlage 52-60, Heidelberg, Federal Republic of Germany

Claims (3)

[Utility model registration claims] 1. A pile station in which sheets are fed in a discharge direction to form a pile, and a stopper surface capable of aligning a leading end and a rear end of the sheets on the pile in the discharge direction. In a sheet-ejecting machine, in particular for a printing press, having a stop configured with a stop surface (12.1) assigned to the leading edge and an aligning surface area (12 '). Receiving surface area (12 ''), said receiving surface area (12 '').
Is disposed in an upper region of the stopper surface (12.1) and is disposed downstream of the alignment surface area (12 ') in the discharge direction, wherein the sheet is discharged. Paper ejection device for the machine. 2. The sheet ejection device according to claim 1, wherein the receiving surface area (12 '') and the aligning surface area (12 ') are directly adjacent to each other. 3. The receiving surface area (12 ″) and the alignment surface area (12 ′) transition continuously from one another,
The sheet discharging device according to claim 2.