FI70680C - FRAMEWORK FOR MOTORIZATION OF FLIGHTAL PARTS WITHOUT FRAMEWORK AND FRAMEWORK INSTALLATION - Google Patents

Description

1 70680

A gripper device for receiving a plurality of parallel tape ends

The present invention relates to a gripping device for receiving a plurality of parallel strip ends from a slitter, the apparatus comprising two beams forming a compression gap, at least one of which is movable parallel to the other to compress the strip ends between the beams.

Figure 1 of the drawing shows such a section line, which is a commonly used structure. The web ends 2 coming from the slitter 1 are pulled over the leveling pit 3 at the beginning of the cut and through the cutting cutter 5, the tension rollers 6, 7 and the oiling machine 8 with the mandrel of the winder 9. The pulling is performed by a gripping carriage moving inside the threading carriage 4, which by its gripping mechanism grips the metal webs 2. The threading carriage 4 moves in its path close to the mandrel and the gripping carriage pulls the ends of the webs onto the mandrel. The trolley moves driven by a chain mechanism.

The problem with known web gripper structures is to make the beams move in exactly parallel directions so that the gripper securely grips each individual strip firmly. The present invention eliminates this problem on the one hand with a new control of the parallel movement, but above all with such a flexible structure of the gripping members that an ideal parallel movement is not necessarily required.

70680

According to the invention, a plurality of spring-loaded nail pieces in line with each other are used in the second beam, which press the strips against the opposite beam.

It is known from the prior art to use flexible pressing members arranged in a beam, for example, when cutting stacks of paper, as is apparent from DE-A-2 839 236. However, these pieces only function to hold the stack of paper sheets or the like uniformly against the substrate. It is not a gripping device for straps and does not have any counter-beam involved in the clamping.

The main features of the invention appear from the appended claim 1. Other advantageous features and further developments of the invention will become apparent from the dependent claims.

The invention will now be described in more detail by way of example and with reference to the accompanying drawings, in which Figure 1 shows a metal strip cutting line with coils already described, Figure 2 shows a trolley in top view, Figure 3 shows a trolley in section in front view, Figure 4 and Figure 6 shows a cross-section of the trolley beams on a larger scale.

3 70680

In Fig. 2, the gripping carriage according to the invention is generally indicated by the number 10. This carriage moves on wheels 11 on rails 12 mounted on the threading carriage 4 of Fig. 1. The movement of the gripping carriage in the threading carriage is effected by a chain drive.

The central part of the invention is formed by transverse, superimposed beams 13 and 14 in the gripping carriage 10. Of these, the upper beam 13 is fixedly mounted on the carriage 10 and the lower beam 14 is vertically movable relative to the fixed beam 13. The movement is provided by hydraulic cylinders 15. On the side facing the fixed beam 13, the movable beam 14 is provided with flexible nail pieces 16, which will be explained in more detail below.

Figure 4 shows the grab trolley in more detail from the side and partly in section. The beam 14 moves relative to the beam 13 on guides 17. The parallel movement of the beams is maintained by cam levers 19 attached to a common shaft 18 which engage the movable beam 14 with slide joints. As mentioned above, 11 is further shown in a side view in Figure 5.

Figure 6 shows on a larger scale the gap between the beams in cross section. The nail pieces 16 in the movable beam 14 are piston-shaped and embedded in the recesses in the beam 14. Referring to Figure 3, the nail pieces are arranged in a single row side by side without spaces in the longitudinal direction of the beams. Beneath the end of each nail piece 16 is a coil spring 21 fitted in a bore in the beam 14, which forces the nail piece 16 towards a fixed beam 4 70680 13. In order to achieve better adhesion, the nail piece 16 is provided with sharp edges 16 transverse to the strip, i.e. with sharp edges extending in the direction of the beam, which co-operate with the edges of the counter rail 22 in the fixed beam 13, as better seen in Fig. 6. 23, which are screwed to the beam 14 and extend partially over the edges of the nail pieces.

In particular, at the beginning and end of the spool, variations in thickness between the parallel webs of the strip are common and cause a variation in the compressive force in conventional adhesive structures, which manifests itself as some webs slipping off the gripper. When, in the structure according to the invention, the normal gripping plates of the compression beams have been replaced by nail pieces pressed against the strips by helical or disc springs, the compression of the nail pieces on each strip is practically the same regardless of the web thickness variations. The suspension of the nail pieces also compensates for possible parallel errors in the compression beams, which naturally improves operational reliability. The spring force of the nail pieces, the shaped and the material used are naturally selected according to the respective strip material and strip thickness.

Claims (8)

A gripping device for receiving a plurality of parallel, end-end band ends from a longitudinal cutting device, the device comprising two beams (13, 14) which form a press nip and at least one of which (14) is movable in parallel with respect to the second (13) in and clamping of the strap ends between the beams, characterized in that at least one beam (14) is provided on the side facing the other beam (13) with a plurality of spring loaded claw bits (16) adjacent to each other , which presses the straps (2) against the opposing beam (13). Device according to claim 1, characterized in that the claw bits (16) are movable in substantially radially directed, in line with one another, bores. Device according to claim 2, characterized in that the claw bits (16) are substantially piston-shaped, whereby a coil or disc spring (21) is placed under the head of the piston. Device according to any of the preceding claims, characterized in that the contact surface of the claw bits (16) is provided with at least one edge extending in the transverse direction of the belt. Device according to claim 4, characterized in that the corresponding beam (13) has a counter-edge cooperating with the edge of the claw (16), which is offset in the longitudinal direction of the strip in comparison with the edge of the claw. Device according to any of the preceding claims, wherein one of the beams (13) is fixed and the other (14) is movable, characterized in that the parallel movement of the beams is provided with a seal, that the movable beam (14) is controlled in guides (17), which