DE271627C

DE271627C -

Info

Publication number: DE271627C
Application number: DENDAT271627D
Authority: DE

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

PATENTSCHRIFTPATENT LETTERING

~ M 271627 KLASSE 28 b. GRUPPE~ M 271627 CLASS 28 b. GROUP

V. St. A.V. St. A.

der Antriebswelle verbunden ist.the drive shaft is connected.

Patentiert im Deutschen Reiche vom 19. Oktober 1911 ab.Patented in the German Empire on October 19, 1911.

Bei Schuhmaschinen sind Bremsvorrichtungen bekannt, bei denen die das Anhalten der getriebenen Welle nach dem Ausschalten der Antriebskupplung sichernde Bremse von dem Anlaßtrethebel aus gelöst wird, ehe die Kupplung für einen neuen Arbeitsgang eingerückt ist. Bei den zum Ausstanzen von Leder und ähnlichen weichen Stoffen gebräuchlichen Stanzpressen, bei denen ein senkrecht auf undIn shoe machines braking devices are known in which the stopping of the driven shaft after switching off the drive clutch securing brake from the The starter pedal is released before the clutch is engaged for a new operation is. In the punching presses commonly used for punching out leather and similar soft materials, where one is perpendicular to and

ίο nieder gehender Preßkolben vorhanden ist, hat man eine Vorrichtung zur Lösung der Bremse vor dem Anlassen bisher nicht angewandt, weil die Bremse vom Preßkolben selbst bei der Aufwärtsbewegung bewegt werden soll, damit dieser nicht seine obere Totlage überschreitet und durch einen weiteren Abwärtsgang den Arbeiter gefährdet. ίο there is a descending plunger a device for releasing the brake before starting has not yet been used, because the brake should be moved by the plunger itself during the upward movement, so that it does not exceed its top dead center and endangers the worker by going down further.

Gegenstand der vorliegenden Erfindung ist eine Einrichtung, welche die Lösung der Bremse vor oder beim Einrücken auch bei solchen Stanzmaschinen mit auf und nieder gehendem Preßkolben gestattet, indem eine Art Kniehebelgelenk die Bewegung von dem Preßkolben auf den beweglichen Bremsteil überträgt, welches vom Anlaßtrethebel beim Beginn der Anlaßbewegung eingeknickt wird. Man erreicht dadurch, daß die Bremse mit großer Kraft angezogen wird und der Preßkolben den Totpunkt nicht überschreiten kann, daß aber andererseits die Lösung der Bremse sehr leicht und mit verhältnismäßig geringer Kraft möglich ist, wie es der -Arbeitsweise eines Kniehebelgelenkes entspricht.The present invention is a device which the solution of Brake before or when engaging with such punching machines with up and down going plunger allowed by a kind of toggle joint the movement of the Plunger transfers to the movable brake part, which from the starter pedal when Beginning of the starting movement is buckled. One achieves that the brake with great force is attracted and the plunger cannot exceed dead center, but that on the other hand, the solution of the brake very easily and with relatively less Force is possible, as it corresponds to the working method of a toggle joint.

In der Zeichnung ist in Fig. 1 eine Seitenansicht des oberen Teils einer zweiköpfigen offenen Stanzpresse dargestellt. Nur einer der Stanzköpfe ist vollständig gezeichnet. Fig. 2 ist ein senkrechter Schnitt von vorn gesehen.In the drawing, FIG. 1 is a side view of the upper part of a two-headed open punch press. Just one of the The punch heads are drawn in full. Fig. 2 is a vertical section seen from the front.

Am Maschinengestell 2 sind Stanztische 4 angebracht, über denen je ein Kopf 6 sich befindet. Die Köpfe sind gleichartig angeordnet, so daß nur einer derselben beschrieben zu werden braucht.Punching tables 4 are attached to the machine frame 2, above each of which a head 6 is located is located. The heads are arranged in the same way, so that only one of them is described needs to become.

In dem Kopf 6 ist ein Kolben 10 auf- und abwärts geführt, der durch eine Exzenterstange 12 von einem Exzenter 14 auf der Antriebswelle 16 aus auf und ab bewegt wird. Der Kolben trägt am unteren Ende eine Platte 18, die auf das Stanzmesser trifft. Für jeden der beiden Köpfe 10 ist eine besondere Antriebswelle vorgesehen. In der Nähe des inneren Endes ist auf der Welle 16 eine geflanschte Bremsscheibe 20 befestigt, mit welj eher ein ausdehnbarer Kupplungsring verbunden ist, der in eine Aussparung einer ununterbrochen laufenden Antriebsscheibe 8 eingreift. Die Scheibe 8 ist entweder auf der Welle 16 oder auf der zweiten Welle 16¹ gelagert, die gleichachsig zu 16 steht und zum anderen Kopf gehört. Der KupplungsringIn the head 6, a piston 10 is guided up and down, which is moved up and down by an eccentric rod 12 from an eccentric 14 on the drive shaft 16. The piston carries at the lower end a plate 18 which meets the punching knife. A special drive shaft is provided for each of the two heads 10. In the vicinity of the inner end, a flanged brake disk 20 is fastened on the shaft 16, to which an expandable coupling ring is connected which engages in a recess of a continuously running drive disk 8. The disk 8 is mounted either on the shaft 16 or on the second shaft 16 ¹ , which is coaxial with 16 and belongs to the other head. The coupling ring

Claims

is expanded and contracted by means of a right and left screw that passes through an arm is rotated on which a spring-loaded slide pin 22 acts. The these The spring loading the bolt seeks to move it in such a direction that the ring expanded and thereby the shaft 16 is coupled to the disk 8. A head start 24 of the bolt 22 comes into engagement with a wedge 26 when the shaft 16 rotates an arm of an angle lever 28, 68 which is rotatable about the fixed pin 30.

A not shown and connected to the rod 42 acts on the angle lever 28, 68 Pedal lever such that when the latter is depressed, the rod 42 is lifted and thereby the arm 28 with the wedge 26 of the angle lever 28, 68 pulled away from the projection 24 so that the resilient bolt 22 engages the clutch. A pawl 32 is located on the arm 28 of the angle lever 28, 68 rotatably mounted, which has a tail piece 34 for a purpose mentioned later and a catch plate 36 which, under normal circumstances, is also supported by a second catch plate 38 on the second one around the pin 30 rotatable lever 40 is detected. The lever 40 is articulated at the other end to the Pedal lever leading rod 42 connected.

Between the flanges of the disc 20 is a brake band 44, one of which End is attached to a projection 46 of a swinging frame 48. The latter is carried by a pin 50 mounted in eyes 52 of the machine frame. Of the Frame 48 has an arm 54 which is articulated to piston 10 at the outer end is connected, so that when the piston 10 moves up and down, vibration of the frame is created. The connection is chosen so that the piston, if he see nearing the top of its stroke, frame 48 swings in such a direction that the brake band 44 tightened and thereby gradually increasing pressure on the disc 20 is exercised, by means of which the machine comes to a standstill when it reaches the upper end of the stroke will.

The device is the same as the usual machine and, as you can see, If no further precautions were taken, the clutch would still be in effect remain until the piston has moved a considerable distance as it descends. The precautions to avoid of this malady are the following:

A yoke 58 is mounted on the arm 48 so as to be rotatable about a pin 56 and on which the other end of the brake band 44 is attached by a pin 60. If that Yoke 58 is rotated so that the pin 60 holds the brake band in such a position that it intersects the axis of the pivot 56, the brake is applied as much as possible. This is the usual situation when the swing frame 48 has been moved to apply the brake. So that the yoke is 58 in this position is obtained, its free end is through a pin 62 with a handlebar 64 connected, which in turn by a pin 66 with the arm 68 of the angle lever 28, 68 is connected. As described above, the other arm 28 of the angle lever 28 carries 68 the wedge 26. When the parts are in their normal rest position, the catch plate is in place 38 on lever 40 engages catch plate 36 on pawl 32. Therefore, when the Lever 40 moved upward around pin 30 by depressing the pedal lever is, the lever 28, 68 is also rotated about the pin 30 (in Fig. 2 to the right), and the wedge 26 leaves the projection 24 of the pin 22, so that under the action of Load spring the clutch is engaged. At the same time ■ the arm 68 is raised and rotates the yoke 58 about the pin 56. This moves the pin 60 downwards, so that the brake band 44 yields and the pressure of the band on the disc 20 is reduced.

It can be seen that this device for releasing the brake is a kind of toggle joint represents, the knee of which the pin 62 forms. On one arm 58 of the toggle joint is the brake band on pin 60 and the movement on the other arm 64 on pin 66 introductory oscillating lever 68 attached.

In the manner described, the brake is automatically released by the worker as soon as he presses the too Drive clutch engages. The tail piece 34 of the pawl 32 is mounted so that it is detected by a cam 70 on the drive shaft shortly after the shaft begins to rotate, so that the catch plates 36, 38 detach from each other to bring the shaft to standstill at the end of rotation. A spring 72 pulls the The wedge 26 on the arm 28 is then in such a position that the coupling engages when the shaft 16 is rotated is released by running up the extension 24 on the wedge surface. The connections between the pedal rod 42 and the brake band 44 are arranged so that the Band is released before engaging the clutch.

Godfather ν τ-APPLICATION:

Device for starting and stopping machines for punching leather and similar soft fabrics where with

ο ο

a drive clutch moved one of the plungers going up and down Brake is connected to stop the drive shaft, characterized in that the movement of your plunger on the moving part of the brake (44) a kind of toggle joint (48, 58, 64) is transmitted, which with the engagement device (42, 40, 28) of the drive coupling (26, 24, 22) is connected in such a way that the toggle joint is simultaneously with or kinked before the drive shaft engages and the braking effect is interrupted.

1 sheet of drawings.