DD139556A1 - MILLING DEVICE ON FIELD AND ADHESIVE MACHINES - Google Patents

Description

Title of the invention

Milling cutter protection on forging and binding machines

Field of application of the invention. ,

The invention relates to a cutter guard on Fälzei- and Klebebindemaschinen at which the milled from the spine paper chips are sucked by vacuum from the milling stations.

Characteristic of the known technical solutions

It is known to suck the milled from the spine paper chips. This accumulating in very large amounts of paper shavings sometimes lead to blockage of the suction device and as a result of the further work of Jj'älzel- and Kiebebindeiaaschine and the consequent further accumulation of paper shavings to damage in the milling station.

It is known to provide optical and acoustic signaling of blockages of the Eohrsystems the suction in central extraction systems. However, this has the disadvantage that it indicates when a blockage occurred, but an incoming damage to the milling heads of Fälzei- and Klebebindemaschinen can only be avoided if a manual shutdown of the respective Fälzei- and Kiebebindemaschine is made.

There are no protective devices known to prevent damage to the milling station in the event of a malfunction in the chip evacuation system of a folding and binding machine.

Object of the invention

The aim of the invention is to avoid consequential damage in the event of faults in the chip suction system.

Explanation of the essence of the invention

From this, the task is derived to create a cutter guard, which prevents overloading of the milling head by clogging of paper chips.

According to the invention, the suction cup comprising the milling head is provided with a bore on a folding and adhesive binding machine in the milling station located below the book block conveying section. In this hole is attached either directly or via a connector a pressure gauge. At the pressure gauge, an electrical contact device is connected, which is connected via a relay to the supply line to the main drive, the folding and Klebebindemaschine. The paper chips that have accumulated as a result of the milling of the book block spine are sucked out of the suction bowl of the milling head by a chip transport fan and transported via a pipe into a bunker. There is a negative pressure both in the pipeline and in the suction cup. Should a blockage of the pipeline or the suction bowl occur, a pressure equalization takes place in the suction bowl. · If the decreasing negative pressure falls below a permissible limit value, a relay is actuated via an electrical contact device and interrupted the supply line to the main drive of the folding and gluing machine «A., Further feed movement of book blocks is omitted and milled paper chips can no longer be incurred. This is a more intensive blockage of the pipeline and the suction

prevented shell and the possible destruction of the milling head, as a result of this "constipation, is avoided".

After the elimination of the causing disturbance, the required negative pressure is restored via the late-transport conveyor and thus the false-top and perfect-binding machine can be put back into operation,

embodiment

The invention will be explained in more detail below with reference to an embodiment. In the accompanying drawing:

Fig.1: Schematic representation of the milling and

guard

the milling head 1 to be protected is arranged below the not-shown book block conveyor section and rotates in the suction cup 2. It is driven

yO by the engine 3 · The brought up by the feed movement of Fälzel- and Klebebindemaschine on the book block conveyor section book block are detected by the milling head 1 and milled along their backs. The resulting paper chips are by the

y5 conveyed by a chip transport fan 4 negative pressure through the pipe 5 into the bunker 6 · In the suction cup 2 is a bore 7 into which a pressure gauge 8 is inserted directly or via a short connector 9. About this pressure gauge 8 of the generated by the chip transport fan 4 and acting in the suction cup 2 negative pressure is measured. If a fault occurs in the suction cup 4; 5> 6, on, be it _{e e} by defect on the chip transport fan 4 or by obstruction of the pipe 5 »so this is affected by a decrease in the negative pressure in the suction cup 2. If this decreasing negative pressure in the suction cup 2 falls below the permissible limit value, then the pointer 10 of the vacuum gauge 8 and via the Konfall-

clocking 11 the Heiais 12 is actuated. Thus, the electrical supply line 13 is interrupted to the main drive of Fälzel- and Klebebindemaschine. A further advancing movement of the book blocks can no longer take place and no more paper chips are produced by the "milling head 1." This eliminates the risk of blockage of the suction tray 2 and prevents the destruction of the head 1 "

If the causative disturbance has been eliminated and the chip transport air 4 has restored the required negative pressure, the contacts of the contact device 11 are opened again via the pressure measuring device 8, whereby the relay 12 drops and the supply line 13 to the control circuit of the main drive of the relay and perfect binding machine is closed again. The IPalzel and Klebebindemaschine is ready for use again,.

Claims (3)

invention claims 1. Ji'räserschutzeinrichtung on Falzel- and Kiebebindemaschinen where the Jfapierspäne milled from the spine are sucked by vacuum from the milling stations, characterized in that a pressure gauge (8) is connected to a chip suction tray (2) of a milling head (1). 2 · cutter protection device according to item 1, characterized in that the pressure measuring device (8) via a
Connecting piece (9) with the Alj> suction cup (2) is connected and to the pressure measuring device (8) an electrical contact device (11) is connected. 3. Milling device according to item 1 and 2, characterized in that the electrical contact device (11) via a relay (12) with der.Stromzuleitung (13) of the main drive of the Fälzel- and Klebebindemaschine is connected « Hierzi £ -Seita drawings