Page collecting device

Abstract

The invention relates to a sheet collector of a printing press. The sheet collector comprises a housing (7) with an opening (8). The stack conveyor (9) extends through the opening (8), and a conveyor plane (18) of the stack conveyor (9) extends above a suction device for air from the blowing device (17).

Description

Technical Field

[0001] The present invention relates to a sheet receiver (Bogenausleger) for a printing press, the sheet receiver comprising a housing having an opening. Background Technology

[0002] DE 10 2007 003 880 B4 and DE 10 2023 100 461 A1 describe sheet receivers. These sheet receivers incorporate measures to prevent powder leakage. These measures often make it difficult to remove the sheet receiver from the stack. Summary of the Invention

[0003] The objective of this invention is to provide a sheet receiving device that is advantageous in terms of transporting out of stacks.

[0004] This task is solved by a sheet receiver for a printing press, which includes a housing with an opening, characterized in that a stacking conveyor extends through the opening and the conveying plane of the stacking conveyor extends above a suction device for air from a blowing device.

[0005] Using a stacking conveyor, stacks of printed sheets can be smoothly and quickly transported from inside the receiver to the outside. Because the stacking conveyor can transport the stacks over the suction device, no adjustments are needed to make way for the stacks. The air drawn in by the suction device from the blowing unit may be loaded with entrained powder or dryer exhaust.

[0006] The following improvements are possible:

[0007] The opening can be closed during printing by using an air curtain generated by a blower at the top and an apron at the bottom.

[0008] The covering can be a roller blind.

[0009] Stacking conveyors can have a pair of conveyor chains.

[0010] Plates can be arranged on these conveyor chains to support stacked trays, and the conveying plane can be formed by the upper side of the plate.

[0011] The stacking conveyor can have a row of rollers.

[0012] These rollers can collectively unfold (aufspannen) the conveying plane with their upward-pointing circumferential sections, which in this case is a virtual plane. Attached Figure Description

[0013] The improvement also comes from the following description of the embodiments and related drawings, wherein:

[0014] Figure 1 A perspective view of a sheet receiving device with a stacking conveyor is shown.

[0015] Figure 2 This shows a view of the sheet receiver viewed against the direction of sheet transport.

[0016] Figure 3 It shows having Figure 1 and Figure 2 A modification scheme for the sheet receiving device of a stacking conveyor.

[0017] Figure 4 It shows the corresponding Figure 1 The view showing section line IV-IV, and

[0018] Figure 5 Another modified version is shown. Detailed Implementation

[0019] exist Figure 1 The image shows the sheet receiving unit 1 of an offset printing press. Freshly printed sheets, subsequently dusted with powder, are conveyed along the conveyor direction 2 to the stack 3. Figure 2 They were then placed on the stack one after another.

[0020] Figure 2 As shown, the stack 3 is located on the bracket 4, which is located on the platform 5, which is suspended on the traction chain 6 and can be raised and lowered by means of the traction chain 6.

[0021] exist Figure 1 and Figure 2 The diagram also shows that the housing 7 of the sheet receiver 1 has openings 8 on both the drive side AS and the operating side BS of the printing press. When the stack 3 reaches a certain height, the stack 3 can be transported out of the housing 7 through the openings 8 by means of a stacking conveyor 9. The stacking conveyor 9 includes a pair of conveyor chains 10 that rotate around sprockets 11 arranged in recesses 12 below the room floor 13.

[0022] A plate 14 is conveyed along the conveyor chain 10, and this plate 14 carries a tray 4 with the stack 3 during the conveying of the stack. For simplicity, the plate 14 is... Figure 2 and Figure 3 It was not shown together with the text.

[0023] During printing, the corresponding opening 8 is isolated at the top by an air curtain 15 and at the bottom by a mechanical cover 16 in the form of a roller blind (e.g., a folding roller blind or pleated blind device) to prevent dust from escaping from the housing 7. The air curtain 15 is ejected by a blower 17, which is configured as a blower pipe and is located at the upper edge of the opening 8.

[0024] exist Figure 4 For clarity, the cover 16 is not shown together with the image. What can be seen is that a suction device 19 is arranged below the conveying plane 18 of the stacking conveyor 9. The suction device 19 draws in the blowing air from the air curtain 15 and also draws in the powder that is drawn into the blowing air.

[0025] In this embodiment, the conveying plane 18 is formed on the upper side of the plate 14, which crosses the suction device 19 arranged in the recess 12 during stacking transport. A variation is also conceivable in which the plate 14 is eliminated, and the bracket 4 sits directly on the conveyor chains 10 during stacking transport, which unfold the conveying plane 18, thus making it a virtual plane.

[0026] Above the suction device 19, the recess 12 is covered by a breathable element 20, such as a grid or a perforated plate.

[0027] The suction device 19 is arranged behind the cover 16 in a direction toward the interior of the housing, and the blowing device 17 is oriented such that the air curtain 15 flows along the inside of the cover 16 and through the element 20 and is received by the suction device 19.

[0028] Figure 3 Implementation examples and Figure 1 , Figure 2 and Figure 4 The only difference in the embodiment is that the recess 12 is eliminated, and the stacking conveyor 9 and the suction device 19 are arranged on the two machine sides AS, BS in a box 21 placed on the room floor 13.

[0029] Figure 5 Another embodiment is shown in which the same reference numerals are used for the same parts as in the foregoing embodiment, so that these parts do not need to be described again.

[0030] As can be seen, the stacking conveyor 9 includes a row of rollers 22 extending from the drive side AS to the operating side BS through the housing 7, which together define a virtual conveying plane 18 in this case. The tray 4 rolls on these rollers 22 when the stack 3 is moved out of the sheet receiver 1 and when the empty tray 4 is moved into the sheet receiver 1.

[0031] The corresponding suction device 19 is located entirely below the virtual conveying plane 18, and the upper edge of the box-shaped housing of the suction device 19 does not protrude beyond the conveying plane 18. The roller 22 and the suction device 19 are arranged above the room floor 13, thereby creating a distance of approximately 100 mm between the conveying plane 18 and the room floor 13.

[0032] An operational scenario is illustrated, in which the stack 3 on the bracket 4 is conveyed outward through the opening 8 on the drive side AS. Here, on the drive side AS, the cover 16 is open (specifically, the roller shutter is rolled up), and the blower 17 is deactivated. On the operation side BS, the blower 17 is activated, and the cover 16 is in its closed position.

[0033] List of reference numerals

[0034] 1-page receiving device

[0035] 2. Conveying direction

[0036] 3. Stacking

[0037] 4 brackets

[0038] 5 platforms

[0039] 6. Traction chain

[0040] 7. Casing

[0041] 8 Opening

[0042] 9. Stacking Conveying Device

[0043] 10. Teleportation Chain

[0044] 11 Sprocket

[0045] 12 pits

[0046] Room 13 Floor (Raumboden)

[0047] 14 Plates

[0048] 15. Air Curtain

[0049] 16 Covering components

[0050] 17. Blowering device

[0051] 18 Conveying plane

[0052] 19. Suction device

[0053] 20 components

[0054] 21 boxes

[0055] 22 rollers

[0056] AS drive side

[0057] BS operating side

Claims

1. A sheet receiver for a printing press, the sheet receiver comprising a housing (7) having an opening (8), Its features are, The stacking conveyor (9) extends through the opening (8), and the conveying plane (18) of the stacking conveyor (9) extends above the suction device (19) for air from the blowing device (17).

2. The sheet receiving device according to claim 1, Its features are, During printing, the opening (8) is closed at the top by an air curtain (15) generated by the blowing device (17) and at the bottom by a cover (16).

3. The device according to claim 2, Its features are, The covering (16) is a roller blind.

4. The device according to any one of claims 1 to 3, Its features are, The stacking conveyor (9) has a pair of conveyor chains (10).

5. The device according to claim 4, Its features are, A plate (14) is arranged on the conveyor chain (10) for carrying a bracket (4) with stacks (3), and the upper side of the plate (14) forms the conveyor plane (18).

6. The device according to any one of claims 1 to 3, Its features are, The stacking conveyor (9) has a row of rollers (22).

7. The device according to claim 6, Its features are, The rollers (22) together unfold the conveying plane (18) with their upward-pointing circumferential sections.

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