DE7535078U - FLYING SWING SHEARS - Google Patents

Description

Applicant; Stuttgart, November 4, 1975

Irma Ungerer Gm 522 10/22

born Dollinger
753 Pforzheim
Arlinger Str. 6

Representative:

Patent attorney

Dipl.-Ing. Max Bunke
7 Stuttgart 1
Lessingstrasse 9

Flying crank rocker shear

The invention relates to a flying crank rocker shears for cross-cutting continuously running sheet metal strips, in which a Upper and a lower blade carrier are provided, which during the SehneidVorganges in the direction of travel of the tape with the tape

7535078 03/18/76

and after the oath of sons carry a knife that has been moved back, whereby the Sohneiden by moving only one of the knives opposite the other takes place and wherein, furthermore, one of the knife carriers is movable into a position so far removed from the sheet metal strip that no more cuts are made, but idle strokes take place as long as the remote position of the knife carrier in question is maintained will.

From OS 1 9 ^ ^ 2k it was known to lower the drive elements of a lower blade carrier that can be driven for cutting in order to be able to switch on idle strokes for the purpose of adapting the cutting sequence to different desired sheet metal lengths. How the height adjustment should be effected in detail was not described there. In the case of a pair of downwardly acting scissors, according to US Pat. No. 2,494,441, working similarly to a toggle press, it was also known to produce a single or a double stroke sequence by adjusting a bearing point of a toggle lever.

The invention is based on the object of easily and quickly controllable idle strokes in flying scissors of the type mentioned to produce in a structurally simple way.

The inventive solution to this problem is that the one, only swinging, not driven to cut in relation to the other, high adjustable knife carrier on a toggle arm is supported so that the knife carried by him is held in the cutting position near the extended position of the knee joint is.

Large weights can be placed close to the extended position of the toggle lever arrangement and other holding forces can be safely absorbed.

In a preferred embodiment, the cutting position is the height-adjustable knife carrier a the dead center position of the Kniehe bel arrangement slightly exceeding (over dead center) position assigned. This creates security against the fact that the drive acting in the knee joint is stressed during the cutting process will.

7535078 18.0176

A further development of the invention is that for the knee joint attacking adjustment drive, a hydraulic cylinder / piston drive is selected that is cheap and reliable and Easily cooperative by means of known hydraulic switching arrangements and can be designed to comply with certain lifting heights. The piston rod of the hydraulic drive is useful hinged on the knee, while the cylinder is pivotably mounted on the frame at its end facing away from the piston rod.

The arrangement is particularly advantageous when the height-adjustable, When cutting, however, the knife carrier that maintains its height is selected as the lower knife carrier, i.e. the cut is carried out by moving the upper knife in relation to the lower knife.

The drawing shows schematically an embodiment of one according to the invention trained flying scissors of the last-mentioned version, in which the sub-meso carrier for the purpose of generating Cutting misfires is adjustable in height.

Fig. 1 is a schematic view of the scissors in the cutting position existing knives,

Fig. 2 is a partial view corresponding to Fig.l with the lowered Lower blade carrier.

The sheet metal strip 1 is fed continuously from left to right in the direction of the arrow drawn in Fig.l. j £ s passes between the upper blade support 2, carrying the Ob'-rmesser ~ j and the bottom Esser carrier 4 supporting the underwater 5, therethrough. The Obertnesserträger 2 is attached to the upper end of SclTiingstangen 6, which are angular to pins of a crank drive 7. At the upper part of the oscillating rods or p \ a Oberme ^ serträger a connecting rod 8 is also pivoted, <± e wirrl driven by cjnem not shown further crank drive out. During the upper blade support 2 by means of the voice ·: Open can ^ s f from the crank mechanism 7 and forth substantially abbewec ', wj.r.1, ^T he ird of the connecting rods 8 forth in the transverse direction oe-.egt, .o that. the upper knife with its cutting edge a composite structure resulting in the ell ^ ^ -nähni: Vp flight curve 9

7535078 18.9176

t

movement executes. The uncutter blade carrier 4 is held adjustable in height on the rockers 6 by means of guides Io. At the inside a first lever 12 of a toggle lever arrangement is articulated, which extends to the knee joint 1.3, which the lever 12 forms with a second lever 14 which is stiffened at 15. A piston rod 16 of a hydraulic cylinder / piston drive engages the knee IJ> , the cylinder 17 of which is likewise fixed / mounted on the frame at 18. If and as long as no cut is to be made, the lower knife carrier 4 is lowered into the position shown in Figure 2, in which the piston rod is inserted into the cylinder and the Kniehe bel-Stützanorraung 12, Ό, 14 buckled most strongly towards the cylinder I7 is. Is kept i of the cutting edge: parch hydraulic pushing out the piston rod wi-d the toggle lever arrangement 12, I3, 14 by means of a hydraulically ^ xi Schnei ¹ of known type control means again in iie in i * "ig.l position shown stretched, in which the lower knife support J The operating position is here slightly above the dead center position of the levers 12, 14, so that the holding and cutting forces cannot affect the drive of the knee 15.

If an idle stroke is performed after each cut, the respective set basic section length doubled, after two idle strokes tripled, quadrupled after three idle strokes, etc .; So "any multiples of the basic section lengths can be cut.

7535078 18.8176

Claims (5)

Marriage claims 1, flying crank shaft. ^T ingschore for transversely cutting continuously-starting sheet metal strips, ^ ei dei an upper and a lower blade carriers are provided which during the cutting process in the direction of belt travel with the belt> ind after tendon id process back moving blades wear, the cutting by shifting only one the knife compared to the other, and one of the knife carriers is also movable into a position so far removed from the sheet metal strip that no more cuts are made, but empty strokes take place as long as the remote position of the knife carrier in question is maintained, characterized in that the one , only swinging, height-adjustable knife carrier (4) that is not driven to cut with respect to the other is supported on a knee lever arrangement (12, I3, 14) in such a way that the knife (5) carried by it is close to the extended position of the knee joint (I3) is held in the interface. 2. Scissors according to claim 1, characterized in that the cutting position of the height-adjustable knife carrier (4) which slightly exceeds the dead center position of the toggle lever arrangement (12, I5, 14) (Over-center) location is assigned. Z). Scissors according to claims 1 and 2, characterized in that a hydraulic cylinder / piston drive (16, I7) engaging the knee joint (13) for the stretching drive of the toggle lever arrangement (12, I3, 14) for the purpose of raising and lowering the one cutter bar (4) ) is provided. 4. Scissors according to claim 1 to J>, characterized in that the piston rod (16) of the hydraulic drive is articulated on the knee joint (1 ^), while the cylinder (I7) at its end facing the piston rod (16) pivotally mounted on the frame ( 18) 5. Shears according to claim 1 to 4, characterized in that the lower blade carrier which is slidably held on the Schwingstangeii (6) 7535078 03/18/76 ' I »II (4) on the hydraulic (16, I7) in various articulated positions movable toggle lever arrangement (12, I3, 14) supported adjustable in height is.