DE1130740B - Locking and lifting device for upper roll support and loading arms on spinning machine draw frames - Google Patents

Description

The invention relates to a locking and lifting device for top roll support and loading arms on spinning machine drafting units with a fixed axis between locking and lifted position pivotable control lever, which is also about a fixed axis foldable arm is connected by a handlebar in such a way that the hinge points of the handlebar and of the actuating arm in the operating position somewhat beyond the dead position in a locked position secured by a stop stand.

The well-known long upper roll support and loading arms with high pressure roller loads can only be released from the operating position and from the non-operating position with considerable effort to lock again in the operating position. This leads to physically weaker operators to premature fatigue.

It has already been proposed to have a fixed axis between the locking and lifted Position pivotably mounted actuating arm with which can also be folded up about a fixed axis To be articulated to connect the upper roll support arm and the loading arm by means of an intermediate link. The Arrangement of the articulation points of the intermediate link on the upper roller support arm and on the actuating arm in the operating position in such a way that they were brought into a dead center position or something beyond, in which they were with could be locked and unlocked with very little effort. This older facility has the Disadvantage that the upper roller support arm is only held in the folded-up position by spring action is.

To hold such arms in the folded-up position is therefore in a known device already in the stationary the pivot point of the upper roller support arm receiving a hole been provided for receiving under spring pressure outwardly striving balls, which then Snap into slightly smaller holes in the side legs of the U-shaped upper roller support arm, as soon as this has reached the upper position in which the two holes are then one above the other.

There is also an adjusting lever known, which is after folding up the upper roller support and loading arm with its rear bow piece in a correspondingly designed counter-shape of the fixed with the Machine connected support sets and thus holds the load arm in the folded up position.

These latter versions have the disadvantage that to secure the support arm in the pivoted up Position still elements have to be used-locking and lifting device

for top roll support and loading arms

on spinning machine draw frames

Applicant:

Actiengesellschaft Joh. Jacob Rieter & Cie., Winterthur (Switzerland)

Representative: Dr.-Ing. RK Löbbecke, patent attorney,
Berlin-Zehlendorf, Neue Str. 6

Claimed priority:
Switzerland of September 20, 1958 (No. 64 188)

Andre Lattion, Winterthur (Switzerland),
has been named as the inventor

sen, the no longer existing components of the upper roller support arm or its locking mechanism for the operating position, but outside of these devices on the stationary Support must be arranged.

The invention is based on the object of designing a locking and lifting device in such a way that that the support arm is reliably locked in the folded-up position without the need for special components will. The invention consists in that the adjusting lever at its rear end is known per se Way has a stop edge and a subsequent detent, which is in the folded-up position supported on the correspondingly designed rear end of the support arm and one with the adjusting lever Fixed pivot pin in the handlebar is displaceable in such a way that the stop edge when folded up is exceeded with mutual approach of both hinge pins and the rear end of the Bracket falls into the rest.

Further details of the training emerge from the description and the claims.

The invention is illustrated by way of example in the drawings. It shows

Fig. 1 is a view of a guide arm on a drafting system with the rear part in longitudinal section along the line I-I of Fig. 2,

209 607/236

Fig. 2 is a cross section along the line II-II of FIG. I ₃

FIG. 3 shows the cross section along the line II-II from FIG. 1, but with it already lifted, in an intermediate position located guide arm,

FIG. 4 shows a representation analogous to FIG. 3 with the Guide arm in fully raised, locked end position,

FIG. 5 shows a longitudinal section through the rear part of the guide arm along the line V-V of FIG. 6 and . ;

6 shows a cross section through the part shown in FIG. 5 along the line VI-VI.

The rod 3, which is fixedly connected to an attachment 1 of the punch 2 (FIG. 1) of a drafting system and running along the machine, is encompassed by a clamping piece 4 in each pair of drafting fields, which is detachably connected to the rod 3 by means of a screw connection 5. The clamping piece 4 serves as a support for an inverted U-shaped guide arm 7, the pivoting of the guide arm 7 about a bolt 9 pushing through the side cheeks 6 and the side legs 8 of the support 4 and the guide arm 7. Also on the side cheeks 6 of the support 4, with the help of a through bolt 10, an overlying the guide arm 7, provided with an inverted U- shaped end, is pivotably mounted, the slightly upwardly curved front end 12 of which, however, extends to the front part of the guide arm 7 extends out and is provided with a spherical handle 13. The adjusting lever 11 also has a transverse link bolt 14 which is fastened in the U-shaped end. This bolt serves to accommodate a bracket 15 which connects the adjusting lever 11 to a transverse bolt 16 of the guide arm 7. As can be seen from Fig. 1, this tab 15 has a longitudinally extending slot 17 in which the tab bolt 14 of the adjusting lever 11 can move during the lifting process. Wedged between the bolts 14 and 16, each leaf spring 18 and 19 sits on the left and right of the bracket 15, which the bolts 14 and 16 seek to remove from one another.

At the rear end of the adjusting lever (Fig. 3) there is a circular catch in each of the side cheeks 11 'and 11 " 20 is provided, which in the lifted position of the guide arm 7 on a support pin 21 of the latter comes to rest over approximately 45 ° of the circumference. For this reason, the catch has one of the bolts 21 corresponding radius. Immediately following the catch, a small cam 22 is provided, which should avoid disengaging. Then the side legs go into a guide curve 23 over, which ends with the lower edge 24.

The operation of the device according to the invention is as follows:

In the operating position, the guide arm is in a position corresponding to FIG. 1, in which the one hinge point, d. H. the bracket bolt 14, was moved slightly beyond the dead position until the stop 25 of the adjusting lever takes effect. The guide arm is clearly locked in this position.

For opening for the purpose of exposing the drafting system the adjusting lever 11 'is raised, which has the effect that the link bolt 14 is moved through the dead position and the bolt 14 reaches the other end position in the slot. This upward movement is continued until the rear lower edge 24 comes to a stop on the support bolt 21 (Fig. 3). A However, continuing the pivoting movement of the adjusting lever 11 is only possible when the bolt is relative to the The edge evades by the guide arm approaching the control lever with a jerk upwards. the the two bolts 14 and 16 approach one another against the pressure of the springs 18 and 19, d. H. the bolt 14 no longer occupies the end position in the slot. The adjusting lever 11 is thus with the guide cam 23 on the Support bolt 21 slide into the circular notch 20, in which then the bolt 14 again through the Springs is pressed into the end position (Fig. 4). The control lever and the guide are in this position secured against falling. Unlocking takes place by pulling down the control lever firmly, whereby the support pin 21 is pushed back by the cam.

The same principle is implemented in the modified embodiment according to FIGS. Here is however, the guide cam 26 with cams 27 and detent 28 is arranged on an intermediate piece 29, d. H. from the Control lever 11 separated and rigidly connected to this via the bolts 30 and 31 fastened in the control lever. This results in the need to also have the intermediate piece 29 in addition to the tabs 32 and 33 to be accommodated within the adjusting lever. To make this possible, there is a pair of round springs 34 and 35 only use very little space.

The function of this device corresponds exactly to that described above, so that on a repetitive Explanation can be dispensed with.

Claims (4)

PATENT CLAIMS: 1. Locking and lifting device for upper roll support and loading arms on spinning machines with a pivotable control lever around a fixed axis between the locking and lifted position, which is connected to the support arm, which can also be folded up about a fixed axis, by a handlebar in such a way that the hinge points of the handlebars and the actuating arm are in the operating position somewhat beyond the dead position in a locked position secured by a stop, characterized in that the actuating lever (11) has a stop edge (24) at its rear end in a manner known per se and a subsequent detent (20) , which is supported in the folded up position on the correspondingly designed rear end of the support arm (7) and a pivot pin (14) firmly connected to the control lever (11) in the handlebar (15) is displaceable in such a way that the stop edge (24) when folded up with both hinge pins (14 and 16) approaching each other will kill and the rear end of the support arm falls into the catch (20). 2. locking and lifting device according to claim 1, characterized in that compression springs (19 and 18) between the two hinge pins serving as hinge points for the handlebar (15) (16 and 14) are clamped. 3. locking and lifting device according to claim 2, characterized in that the Adjusting lever (11) has an elevation (22) serving as a safety cam. 4. locking and lifting device according to claims 2 and 3, characterized in that the guide cam (26) can be rigidly (30 and 31) connected to the adjusting lever (11) on a special one, but easily removable element (29) is arranged (Fig. 5 and 6). Documents considered: German Auslegeschrift No. 1 027 570;
U.S. Patent No. 2,813,308. Older patents considered: German Patents Nos. 1,071,548, 1,085,796. For this purpose, 1 sheet of drawings