DE1239652B - Safety device for wire pay-off machines - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

B 21c

German class: 7 b -5/70

Number: 1239 652

File number: G 447071 b / 7 b

Filing date: September 17, 1965

Open date: May 3, 1967

The invention relates to a safety device for wire pay-off machines, in which the ring-shaped Wire bundle from a horizontally arranged drum and from two below the drum against each other pivotable support rollers with their rotatable mounted shafts firmly connected to levers is worn.

Wire unwinding machines of this type are known per se. With these, the wire is pulled by means of take-off rollers unwound and passed through a set of straightening rollers arranged downstream of these rollers. The advantage of these machines lies essentially in the fact that the large bending forces for bending open the windings securely applied, the wire precisely straightened and the wire entry height into the processing machine can be precisely adhered to, which is essential for trouble-free continuous operation. Experience has shown, however, that even with wire unwinding machines of this type, malfunctions occur under certain circumstances resulting from the fact that when unfavorable circumstances coincide, e.g. uneven Material hardness and out-of-round wire windings, single or multiple wire windings tie it on the drain drum. This leads to the bending of the backup rolls and even their Cancel if the tensile force of the processing machine is very high.

The invention is therefore based on the problem of the risk of a wire winding constricting off the drain drum before such a lacing has occurred. The inventive The solution to this problem is that on the one pivot lever shaft, two one behind the other Levers are arranged, one of which is wedged on the shaft, while the other, on this Shaft rotatable lever is articulated with an adjusting spindle and both provided with switching contacts Lever bear joint pieces that stand with a common, under the action of a spring Draw bolts are coupled.

As a result, a safety device is created in the simplest and most reliable mode of operation, by means of a very sensitively adjustable tactile action electronically in the event of imminent danger the wire-drawing processing machine stops. There is the advantage that a time consuming Loosening the lacing is avoided that it does not come to that.

In the drawing, the invention is illustrated in two exemplary embodiments.

It shows

1 shows a front view of a securing device according to the invention for wire pay-off machines

Applicant:

Franz Gerst, Ihmert (Westphalia), Schulstr. 10

Named as inventor:
Franz Gerst, Ihmert (Westphalia)

trained wire unwinding machine with normal operating position of the support rollers,

F i g. 2 shows a corresponding front view in the dangerous position of the backup rollers,

F i g. 3 shows the support roller bearings according to FIG. 3 on a larger scale. 1,

F i g. 4 the same according to FIG. 2 and

F i g. 5 shows a longitudinal section on this according to line AB in F ig. 3;

Fig. 6 shows another embodiment for wire coils of large diameter, namely one partial front view with discharge drum and backup rollers, in normal operating position,

7 shows a similar view, but in the dangerous position, and

F i g. 8 shows a longitudinal section of this.

The machine body 1 has a horizontally and rotatably mounted wire drum 2 below the same two backup rollers 3 are provided in a symmetrical arrangement. The reels are on the ends of pivot levers 4, which are each firmly connected to a shaft 5, 5 ', which are stationary, however are also rotatably mounted in the machine body 1. The two shafts 5.5 'carry spur gears 6, which intermesh, so that the pivot levers 4 and the support rollers 3 are pivoted together in opposite directions can be.

On one pivot lever shaft 5 ', two levers 7, 8 are arranged one behind the other, from one, 8, of which is keyed on the shaft 5 ', while the other, 7, is rotatable on this shaft 5', i. H. is loosely stored. The lever 7 is articulated to a spindle nut 9, which is on an adjusting spindle 10 sits; the latter penetrates a support bearing 11 fastened to the machine body 1 and is responsible for the adjustment of lever 7 necessary handwheel 12.

The lever 7 has an abutment 13 attached laterally to it by means of the pivot 13 ', onto which a disk spring assembly 15 is supported, which is slidably penetrated by a tension bolt 14, the End in the joint piece 16 on the lever 8

709 578/112

Claims (1)

is consolidated. The other end of the tension bolt 14 is fitted with adjusting nuts 17 running on a thread, by which an adjustment of the pretensioning force of the disk spring assembly 15 is effected. Furthermore, an adjustable stop screw 18 is seated on the lever 7 and steps against the lever 8 the spring travel of the disc spring assembly is limited. In addition, the electrical switching contact 19 is attached to the lever 7. The actuation stop 20 for this contact 19 is located on the lever 8. The one acting in the manner of a limit switch Switching contact 19 closes the circuit of the drive motor via a contactor (not shown) wire processing machine, also not shown, as long as it is not opened by the actuating stop. The mode of operation of the safety device is as follows: As soon as the inner clear diameter χ of the clamped wire bundle (see. Fig. 1 or 3) z. B. reduced to x ' (Fig. 2 and 4), the support rollers 3 are loaded and pivot against each other, the compressive force of the plate spring assembly 15 must be overcome, since the latter is supported against the intransigent setting of the lever 7. Here, the pivot lever 4 carrying the support shaft 3 moves, rotates the shaft 5 'together with the lever 8 and uses the tension bolt 14 to compress the disk spring assembly 15 the actuation stop 20 to the switching contact 19 and actuates it. The switching off of the drive motor of the processing machine brought about by this brings the latter and thus the wire unwinding to a standstill. Since the windings have not yet tightened, the malfunction can be eliminated easily and quickly possible. In the embodiment shown in FIGS. 6 to 8 are only for the purpose of clamping of collar rings with a large inside diameter, the pivot levers 4 carrying the support rollers 3 in their angular position offset, and because of the greater distance between the shafts 5, 5 'instead of the spur gears 6, the worm gears 6 'are provided, which have a right-hand and a left-hand helical gear 6 ", 6" 'are coupled in opposite directions. The fuse is designed symmetrically. Both on shaft 5 and on shaft 5 ' sits a worm wheel 6 '(see Fig. 8) loosely rotatable. The worm wheel hub carries a lever 7, which is connected to the one on the shaft 5 by means of a pull rod 14 or 5 'firmly wedged lever 8 connected. In this embodiment too, the pull rod 14 passes through a disk spring assembly 15, which in its pretensioning force can be adjusted by the adjusting nut 17. For the purpose of adjusting the support position ίο of the rollers 3, the shaft 10 of the worm wheels 6 ″, 6 ′ ″ is guided to the outside and has a hand wheel 12 or the like. The switching contact 19 is seated on a projection of the hub of the lever which carries the stop screw 18 7, so that the edge of the arm 8 forms the actuating stop for the switching contact 19. The mode of operation of this training is analogously the same as described above and is of the F i g. 6 and 7 shown. In both embodiments, the support rollers pivot automatically under the pressure of the disc springs when the annoying tying of the wire is removed, return to its basic position and give at the same time via the switching contact 19, the switch-on option for the processing machine free, the then again operates the rest of the wire run-off through its tensile force. Claim: Safety device for wire unwinding machines, in which the wire ring is horizontal arranged drum and two lying below the drum, on against each other pivotable support rollers with their rotatably mounted shafts firmly connected to levers is carried, characterized in that two levers (7, 8) are arranged one behind the other on the one pivoting lever shaft (5 ') of which one (8) is wedged on the shaft (5 '), while the other, on this Shaft rotatable lever (7) is articulated with an adjusting spindle (10) and both with switching contacts (19, 20) provided levers (7, 8) carry articulated pieces (13, 16) which have a common, under the action of a spring (15) standing tension bolts (14) are coupled. For this purpose 2 sheets of drawings 709578/112 4.67 © Bundesdruckerei Berlin