DE4224309A1 - Tensioning device for coils - Google Patents

Description

The present invention relates to a device for Tensioning spools or winding cores for web material.

Machines or devices for handling spools or reels are already known, especially for paper and plastic roll. Such coils have considerable dimensions and big weights. The functionality and functioning of the front existing machines is mainly due to the small scope of Degrees of freedom of the support arms for the coils are impaired, which makes handling difficult.

The company proposes to eliminate such existing disadvantages lying invention before a tensioning device for coils the

• a) ensures greater freedom of movement of the support arms is for more versatile use of the device for Coils of different TYPS (width or diameter) enable;  
• b) non-rigid devices integrated in the support arm holder are to facilitate the application / removal of the coils;
• c) Devices for moderate decentration of the coil support pins are integrated to cover the entire width of the coil or to achieve a uniform tension in their web material.

Further details, features and advantages of the Invention appropriate clamping device result from the following Description using exemplary embodiments in connection with the drawings. It shows, each schematically,

Fig. 1 is an overall plan view of a clamping device for coils according to the invention, wherein a clamped bobbin B is indicated with broken lines,

Fig. 2 is an extension or the clamping device 7 in one of its terminal positions,

Fig. 3 shows a decenter in its three most important positions, wherein

• - complete centering O with solid lines,
• - With broken lines an end position with maximum Decentration A and
• - with dash-dash lines the other end position with maximum Decentration B are shown while

Fig. 4 shows a support arm 3 with associated tilting device 5 for a pivoting or inclined position.

The present invention is a bobbin clamping device with a stationary frame 1 , in which movable frames 4 are supported and guided, which in turn are provided for guiding movable holders 2 for bobbin support arms 3 .

In the illustrated embodiment

• - two holders 2 are each supported on a movable frame 4 and by means of adjusting devices 41b slidable in the conditions shown in Figure 1 D2 directions between two end positions;.
• - The movable frame 4 arranged in the fixed frame 1 can be displaced between two end positions with the aid of devices 41 a in the directions D1 shown in FIG. 1;
• - Each individual holder 2 carries an extension or tensioning device 7 in which an associated drive cylinder 41 b is adjustable for at least two work areas;
• - Each coil support arm 3 devices 5 for its swivel or tilt adjustment;
• - Each support arm 3 has an axle or receiving pin 6 for coils B, which is aligned with the axle pin 6 of the other arm 3 ;
• - Each coil support arm pair 3 is supported on a common movable frame 4 and provided with an associated decentering device B, with the help of which the journal 6 can be adjusted for a coil B from its flight.

The adjustment devices 41 a for moving the movable frame 4 with respect to the fixed frame 1 include:

• a) fluid cylinders, one element, for example the cylinder, with the fixed frame 1 and the other element, for example the piston, with the movable frame 4 in connection;
• b) guide means in the movable frame 4 , which are received and displaceable in the associated rails of the fixed frame 1 .

The devices 5 for tilting or pivoting the coil support arms 3 with respect to the frames 1 , 4 are fluid cylinders, one element of which, for example the piston rod 51 , with the corresponding holder 2 and the other element of which, for example, the cylinder the support arm 3 is connected.

The extension or tensioning devices 7 each consist of individual connection groups or parts 71 , 71 ', at least one of which protrudes vertically from the associated holder 2 . Each connection or support member 71 , 72 'contains means or openings ( 11 ) in which, for example by means of a bolt 72 , the piston rod of the associated cylinder 41 b is articulated, which is provided for this purpose with a bearing eye 411 at the end.

The Dezentriereinrichtungen consist corresponding to FIG. 3 each consist of a lever 81 with an associated hydraulic circuit 82, which acts simultaneously on both axle or spigot 6 for a coil B. When the lever 81 is actuated, the receiving pins 6 are displaced simultaneously and in opposite directions from their coaxially aligned position.

The construction described above gives the support arms 3 greater freedom of movement and more extensive adjustment options for mutual approaching or removing, which also results in an enlarged working area with respect to the width of the bobbins or winding rolls B.

At the same time, irregular tensions are balanced out can occur in the winding rolls B, so that during the Working phase across the entire width of the rolling up or down Uniform tension is achieved becomes.

Claims (5)

1. Tensioning device for coils, winding rolls or winding cores, with a stationary frame, which bears supporting arms arranged in pairs, each supported on a holder and adjustable in their distance from one another, characterized by the following features:

• a) each support arm ( 3 ) is supported on a movable frame ( 4 ) which is displaceable in the stationary frame ( 1 ) with the aid of adjusting devices ( 41 a) between two end positions;
• b) each support arm ( 3 ) is connected to adjusting devices ( 5 ) for a tilting or angular movement with respect to the movable frame ( 4 ) supporting it;
• c) each support arm holder ( 2 ) carries an extension or tensioning device ( 7 ) which enables its positioning with respect to a fixed drive cylinder ( 41 b) for at least two working positions;
• d) each pair of support arms ( 3 ) is arranged on a common movable frame ( 4 ) and is provided with a device ( 8 ) for decentring the two end-axis receiving pins ( 6 ) of a coil (B), in order to be able to use the coil during winding operation maintain an even tension across the entire coil width in the web material.

2. Clamping device according to claim 1, characterized in that each extension device ( 7 ) has a plurality of connecting parts ( 71 , 71 '), at least one of which protrudes perpendicularly above the corresponding holder ( 2 ) and extends coaxially to the piston rod of the actuating cylinder ( 41 b) , The connecting parts ( 71 , 71 ') contain openings ( 711 ), so that one or the other connecting or supporting part can be connected to the piston rod of the actuating cylinder ( 41 b), around its adjustment range and that of the corresponding support arm ( 3 ) to change. 3. Clamping device according to claim 1 or 2, characterized in that the means for decentring the journal ( 6 ) for a coil (B) have a hydraulic circuit ( 82 ) connected to the lever ( 81 ), via which simultaneously and in opposite directions Axle pins ( 6 ) are adjustable from a coaxially aligned position. 4. Clamping device according to one of the preceding claims, characterized in that the adjusting devices for moving the movable frame ( 4 ) with respect to the fixed frame ( 1 ) consist of longitudinal guides or grooves in the fixed frame and associated projecting guide means received therein on the movable frame , And that Actuate supply cylinder ( 41 a) are provided, the cylinders of which are connected to the stationary frame and the piston rod of which is connected to the movable frame. 5. Clamping device according to one of the preceding claims, characterized in that the pivoting movement of the individual coil support arms ( 3 ) with respect to the associated frame ( 2 ) with the aid of actuating cylinders ( 5 ), the cylinders of which are articulated to the movable frame and the piston rod of which is articulated on the support arm or vice versa is.