DE2647474C2 - Discard winder for web-shaped goods - Google Patents

Description

The invention relates to a disc winder according to the preamble of claim 1.

A discard winder of this type is known from DE-PS 11 67 148. This discard winder is the piston-cylinder unit is depressurized in the winding operation, so that the mounted at the free end of the boom Discard and pressure roller rests on the roll. In the drop mode, the boom is hydraulically operated by the actuated piston-cylinder unit held in its highest possible position.

In the winding operation, the known device has the disadvantage that the full weight of the cantilever arm and the discard and pressure roller rests on the roll. Relief through a corresponding charge the piston-cylinder unit is not possible because of the lack of elasticity of the hydraulic fluid. if z. B. the web to be wound has a transverse seam, is due to the relatively large weight ironed in this seam of the overlying cantilever arm. This can damage pressure-sensitive goods will.

In the depositing operation, the known device has the disadvantage that, especially when the stack begins to form the distance between the Abtafleschwenkarm and the stack is very large. This can be for light goods such. B. as a result a draft can easily lead to disruptions and irregularities when laying down.

From DE-OS 19 20 445, 21 46 650, 22 03 696 and 23 64 513 are winding devices, however without offshoots, known whose piston-cylinder units are actuated with compressed air.

The invention is based on the object of providing a disc winder as described in the preamble of claim 1 specified type to improve, so that the boom in the winding operation by means of the piston-cylinder Einheil Can be elastically supported and in the discarding mode with the minimum distance between the detaching swivel arm is rigidly attached to the stack in order to absorb the forces from the moving masses without vibrations can.

^r> This object is achieved by the characterizing features of claim 1.

In the winding operation, the elasticity of the piston-cylinder unit to which compressed air is applied enables a Relief of the wrap from the weight of the

κι boom swing arm without affecting the Indulgence. Since such a resilience is undesirable in the unloading operation, the locking ensures for a fixed bracket.

The feature of claim 2 enables the automatic setting of a minimum distance between the stack and the deflector swivel arm.

To pivot the boom arm, it is also possible, according to claim 3, separately driven Arrange cams or racks. The cylinders charged with compressed air do not have this more the task of pivoting the boom, but are only used for additional support.

Eir embodiment of the invention is shown schematically in the drawing in a side view and is described in more detail below.

A material web 1 coming from a treatment device 2 becomes one via deflection rollers 3 and 4 Deposit and pressure roller 5 out. This deposit and pressure roller 5 is at the free end of a cantilever arm

jo 8 arranged and is driven separately. The other end of the boom 8 is in one Pivot point 9 articulated.

Cylinder 10 of piston-cylinder units to which compressed air is applied are fixedly arranged on the boom 8. Since this pneumatic cylinder 10 is also pivotable must be, they have an articulated bearing 12 which is arranged in a support leg 13.

During Abiegebetrieb the boom 8 is pivoted so that the deposit and pressure roller 5 on a winding building up around a cheek axis 18 rests on it. When deposited in folds, the material web 1 guided over tafer rollers 6 and 7 arranged at the end of a Abtaflerschwenkarmes 17. The Abtafleschwenkarm 17 can be driven via a crank mechanism 16. The extension arm 8 is guided in folds when it is put down, that in each case an almost constant minimum distance between the stack of webs building up and the Abtaflerschwenkarm 17 is complied with.

An adjusting device 15 is arranged on the pneumatic cylinder 10, which is used to rigidly define the Cantilever arm 8 is used. According to the exemplary embodiment, the pneumatic cylinder 10 is provided with a clock circuit 14 provided, which consists of six inductive limit switches. Signals go through a pulse generator are derived from the web speed, to a pulse counter whose setpoint is for adaptation to the Goods can be set. When the setpoint is reached, the air is released, and piston 11 of the Piston-cylinder units move until they reach the

bo have reached the next induction limit switch. As a result, the air supply is blocked again and the adjusting device 15, which at the beginning of the cycle process was released, tightened again.

1 sheet of drawings

Claims (3)

Patent claims: 1. Discarding winder for web-shaped goods, for winding large loafs or for depositing in Fold by means of a pivoted extension arm, which has a driven placement and Has pressure roller and a Abtaflerschwenkarm and by one of piston-cylinder units formed adjusting device in a winding or. Storage position is pivotable, thereby characterized in that the pistons (H) of the piston-cylinder units to which compressed air is applied (10, 11) can be locked in any given position. 2. Discarding winder according to \ nspruch 1, characterized in that the cylinders (10) of the piston-cylinder units (10, 11) are provided with clock circuits (14). 3. discarding winder according to claim 2, characterized in that for continuous pivoting the cantilever arm (8) separately driven cams or racks are arranged.