DE1074900B - Punch arrangement - Google Patents

Description

GERMAN

The counting card punching machines known as card doublers or card punches do the actual work Punching process by punch, of which eighty lie next to each other in known embodiments. Each punch is via an intermediate link, which is clicked on during a certain part of the A magnet acts in the operation of the punching machine.

Punch assembly

a continuously moving up and down rail is coupled, which in turn is driven by an eccentric and transmits the force for the punching process. There are two different options for one such punch drive became known. In the one widespread arrangement, the latching takes place of the intermediate link in the up and down rail while it is still in motion. As a result, this arrangement is obviously subject to a large one, especially at high speeds Wear and tear. On the other hand, the arrangement is simple because you rely on a special controlled knock-off device can dispense with the up and down of the intermediate link after the perforation has been completed walking rail separates. This knocking off takes place in that the intermediate link against when going up a stationary cutting edge is hit. The rail is also driven by a simple one Eccentric. You could achieve that by using complicated cam shapes instead of the eccentric engaging and knocking off at times of standstill or at lower speed he follows; the problem and the wear would then be at the desired high speeds only relocated to the cam drive, since the cam follower rollers at the points in the case of complicated cams jump off at high acceleration.

In the case of the other known arrangement, the intermediate member is locked into place and it is tipped off at rest, but a specially controlled tee bar is required and the pontic is not hinged in a simple way to the armature of the magnet, but there are several additional levers and Spring clutches required, one of which by a simple rotating further tee pin is operated. At higher speeds, the interaction of the parts becomes more and more critical, and the The advantage of snapping into place at rest can be achieved with less and less security.

The invention now provides for remedying these shortcomings that the force effect for the punching process of a rotating at twice the speed of rotation compared to the control cam Eccentric is exercised by a linkage, the joint of which by the control cam during one eccentric rotation is moved so that the rail remains at rest for a full rotation of the eccentric while Applicant:

IBM Germany
International office machines

Gesellschaft mb H.,
Sindelfingen (Württ), Tübinger Allee 49

Walter Scharr, Stuttgart-Vaihingen,
has been named as inventor

during the next rotation a force is exerted by stretching the joint.

It is achieved with this arrangement that the cam disks are only used for control purposes while the actual labor for punching is supplied by the eccentric.

In the drawings shows

Fig. 1 the punch drive in the position of the ineffective eccentric stroke,

Fig. 2 shows the drive in the position of the effective eccentric stroke.

The eccentric shaft 21, which is the power drive for the punch movement, rotates twice during each punching process, but only causes the punch 28 to actually be actuated with every second rotation connected levers 22 a and 22 b made. A follower roller sits on the joint axis and is pressed against a cam 24 which rotates at half the speed of rotation as the eccentric shaft 21. By means of the cam 24, a punching movement is now alternately permitted during one eccentric rotation, but the joint 23 is buckled so far during the next eccentric rotation (see FIG. 1) that the hole bar 27 remains at rest. During the first half of this rest period, the intermediate links 28 that were still engaged from the last piercing process are pressed off and the new intermediate links are set during the second half. The intermediate links are pressed off by a rail 25 which is actuated by a further cam 26. During the punching stroke, the joint 23 is moved a few degrees beyond the extended position, so that the force of the

909 728/284

Eccentric 21 contributes to pressing the roller 23 against the cam 24 (Fig. 2).

Claims (2)

Patent claims: 1. Hole punch arrangement, in which the punch set for punching are locked by intermediate links in a continuously up and down punching rail during a punching machine game and in which the movement of the rail is controlled under the action of a cam so that the rail is in Rest is and that during the first half of the rest period, the intermediate links set by the previous operation are released from the connection with the rail and are brought into engagement with the rail by magnet actuation during the / -wide half, characterized in that the force for the hole process of an eccentric (21) rotating at twice the rotational speed of the control cam is exerted by a linkage (22a, 22b) , the joint (23; of which is moved by the control cam during one eccentric rotation so that the rail (27; Quiet remains, while at the next U rotation a force is exerted by stretching the joint. 2. Arrangement according to claim L, characterized in that the deflection during the rail actuation stroke takes place in such a way that part of the force of the eccentric is used to press the joint guide roller (23) is used on the control cam (24). Considered publications:
German patent specification No. 424 814. 1 sheet of drawings © 909 728/284 1.60