DE437853C - Scissors for straight and miter cutting of profile iron of all kinds with knives cutting past each other - Google Patents

Description

The scissors of the present invention are used for Straight and miter cutting of all types of profile iron and has cross-cutting Knife, whereby it is achieved that the profile iron is cut without waste. she has a closed mouth during its work, but this is necessary for the convenience of inserting the Profile iron automatically opens wide in the knife opening.

ίο All knives are easy to change because the cover r is arranged so that it can be opened. In this cover r are the knives α and b and also the rocker i with its knife c. After opening this knife cover with the rocker arm, the support knives e, 0, h are also easily accessible.

This rocker * is after cutting by the by the drive cam 1 and its stilt 2-actuated rocker k by m in a slot ¹ of the rocker i cross pin m of the rocker k k raised during traction of the rocker, so that a new carrier in the Machine can be inserted. The moving knives (support knives) are the upper knife 0 and the front side knife h. These are mounted in the rocker arm k actuated by the drive eccentric 1 and the pressure stilt 2. This swing arm can be rotated about a bolt I , which sits in a third swing arm f. The rocker f can be rotated about an upper bolt g and carries the lower blade e. This rocker f is caused to vibrate in that the rocker k with a shoulder p ¹ lays against a stop tab p of the rocker f , whereby the rockers k and f perform a common movement around the pin g. The bolt I, around which the rocker k rotates, sits in the rocker f. So you have two fixed knives α and b, which are mounted in the knife cover r and remain stationary, a movable knife c that remains stationary when cutting "sits in the rocker i , which can be rotated around the pin d in the knife cover r and can be folded down with the knife cover, a movable knife e in the rocker f, which is rotatable about the bolt g of the machine frame, and the movable knife h and 0, which are mounted in the rocker arm k , which is rotatable about the bolt I of the rocker arm f.

This group of knives is shown on the accompanying drawing.

Fig. Ι shows the knives in action lifted up,

Fig. 2 the same lowered, ready to make a cut;

Fig. 2a is a longitudinal section along AB (Fig. 2);

Fig. 3 shows the knives in action after they have made a cut;

Fig. 4 illustrates the rocker arm i with the movable knife c raised and the stationary knives pulled out and the active knives punctured;

Fig. 4a shows a vertical section CD for the mounting of the pivot pin d of the rocker i in the hinged knife cover r,

Fig. 5 the rocker i lowered and placed on the carrier and the stationary and active knives according to Fig. 4,

Fig. 6 'the position of the rocker arm i and the knife after cutting through the carrier;

Fig. 7 shows a “front view of the cover r. The support knives 0 and h , which are moved during cutting, are accommodated in the rocker k , which can be rotated around the bolt I of the rocker f . The lower support knife e, which is moved during cutting, is in the rocker f The upper lid knife c , which can move but remains stationary during cutting, is located in the rocker arm i,

which swings around the pin d of the knife cover r. The lid knives α and δ are fixedly mounted in the lid r. The eccentric ι transmits the force to the rocker k by means of the pressure stilt 2 and pressure eye 3 and, with the intermediation of the contact surfaces ft ¹ , ft to the rocker f.

Fig. Ι and 4 show the knife in the maximum position of the eccentric, when they are furthest apart. When the drive is switched on, the rocker k and with it also the rocker i, because these two rockers are coupled by the bolt m , rotated and brought into the position shown in Fig. 2, 5, because the rocker k rotates around bolt I. and rocker i around bolt L · The knives are ready to cut, ie the movable support knives 0 and h of rocker k and cover knife c of rocker i are in the position they would have if they were made from one piece.

When you turn the eccentric, the

Rocker f by the rocker k as a result of the contact surfaces p, p ¹ around the bolt g rotated, which has the consequence that the support diameter 0, of the rocker h k and the lower support blade ß'der rocker f to the solid cover diameters α and b and move past the lid knife c carried by the rocker i and cut through the profile iron.

This position is shown in its lowest position in Figs. The pressure stilt eye 3, which moved from position (Fig. 1) to position II (Fig. 2) at the beginning of the downward movement, has reached position III (Fig. 3) when these movable knives are at their lowest point. As the eccentric 1 continues to rotate, the rocker f is rotated around its pin by a spring 4 or a corresponding counterweight to the extent that the rocker k goes up until its attachment q ^{1 has placed} itself on the pin q . The pressure stilt eye 3 has then reached position II again.

In order to open the knife mouth, a cam disk η is attached to the shaft of the eccentric 1, which, after the rockers k and f have gone up, causes the rockers k and i to rise further. Characterized in that the cam η to the roller k ¹ of the rocker starts k, the rocker k by its bolts I in the rocker f rotated and simultaneously takes the rocker k by its bolts m the d about the pin oscillating rotatable rocker i with .

When the eye 3 of the pressure stilt 2 has reached the topmost layer I, including the working mouth is completely open, the scissors are stopped by automatically disengaging a clutch.

Claims (4)

Patent claims: i. Scissors for straight and miter cutting of profile iron of all kinds with knives cutting past one another, characterized in that a fixed lower cutter (a) and a fixed rear side cutter (δ) are firmly mounted in a cover (r) of the machine frame, a third upper cutter (c ) is mounted in a rocker arm (i) whose pivot (d) lies in the knife cover (r) , a fourth movable lower knife (e) is carried by a second rocker arm (f) which is rotatable about an upper pivot point (g) and at the same time with its bolt (I) forms the pivot bearing for a third rocker arm (k) , which carries a front side knife (h) and an upper knife (0) and is rotated around the pivot pin (Z) by an eccentric drive, and the third rocker arm (k) Contact surface (p, p ¹ ) on the second rocker (Q is located, so that the second rocker (Q) is rotated around its pivot pin (g) as a result of its contact with the third rocker (k) and the movable support knife (0, ti) the rocker (k) and the support knife (e) of the rocker () move past the cover knives (a, b) of the cover (r) and the cover knife (c) of the rocker («') and cut through the profile. 2. Scissors according to claim 1, characterized in that the automatic opening of the scissors mouth is effected by a cam (η) which runs against a roller of the third rocker (k) , with the slot guide (m, m ¹ ) also the The swing arm (i ) carrying the lid knife (c) is lifted up. 3. Shears according to claim i, characterized in that the fixed lower knife (α) and the fixed side knife (δ) directly supporting and the upper knife (c) of the rocker (i) by means of bolts (d) supporting knife cover (r) can be folded down in order to be able to change these knives easily and to expose the remaining knives. 4. embodiment of the scissors according to claim i, characterized in that the balanced by spring or weight, the system for the rocker (k) forming rocker (Q stop on an abutment bolt (q) takes place so that the rocker (k) with the Swing arm ( i) goes up to open the knife mouth. For this purpose 2 sheets of drawings.