SU581857A3 - Device for destacking flat objects - Google Patents

Description

(54} DEVICE FOR DETERMINING THE STEPS OF FLAT MATTERS

one

The invention relates to devices for disassembling a stack of flat objects, such as punched cards, mailings, etc.

A device for disassembling a stack of flat objects is known, comprising a magazine for the foot, a roller feeding mechanism and a pressure plate for pressing the foot against the feeding roller 1.

However, depending on the height of the foot, the frictional force between the feeder roller and the bottom flat object is variable.

The purpose of the invention is to increase the reliability of the device by providing a relatively constant amount of frictional force between the separated object and the feed roller.

For this, the proposed device has means for varying the pressure of the pressure plate on the foot, containing a permanent magnet, a lever pivotally connected to the pressure plate, and a flat spring fixed on the lever and having the possibility of interacting with the permanent magnet.

FIG. 1, 2, and 3 illustrate a device for disassembling a stack of flat objects having different heights of the foot.

A device for disassembling a foot of flat objects comprises a magazine for a foot of objects, having a base 1 and a front wall 2, forming with the base an exit slit 3, a roller feed mechanism made in the form of a driving roller 4, a pressure plate 5, means for changing the pressure of the pressure plate on the foot containing a permanent magnet 6, a lever 7 connected by means of a hinge 8 to a pressure plate and by means of a ball 9 with a frame 10 of the magazine, and a flat spring 1 fixed at one end on the lever 7 by a protrusion 12, and the other on the ball 9. 9. To retract the objects to be separated from the drive roller 4, there is a mechanism consisting of a spring loaded 13 of a two-armed lever 14 carrying on the shoulder 15 a roller 16 and mounted on an axis 17, a lever 18 pivotally connected at one end to the double-arm lever 14 and carrying at the other end, the measles 19 electromagnet 20.

In addition, for the free movement of the plate 5 on the upper object, a roller 21 is mounted on it, and for lifting the plate 5 when charging the magazine there is a handle 22.

The device works as follows.

Before work, the operator, by the handle

22 podnatn in plate 5, laid on the base

i foot 23 flat objects. When the magazine is fully loaded (see Fig. 3), the flat spring 11 does not interact with the magnet 6 and the foot only experiences the pressure of the plate 5. Then, by means of an electromagnet 20 controlling the removal of the roller 16 from the bottom plane of the foot 23, contact is made between the exit roller 4 and the lower object of the foot 23. The item withdrawal of objects is carried out by the roller 4 through the slit 3, the size of which is determined by the thickness of the items removed from the store.

As the height of the foot 23 decreases, the flat spring 11 begins to be attracted to the magnet 6, creating additional force through the plate 5 to the foot 23.

As can be seen from FIG. 1, with a slight height of the foot 23, the flat spring 11 is almost completely adjacent to the magnet 6 and, due to its deflection, creates a force on the foot, which provides relatively the same frictional force between the separable sheet and roller 4 as at the maximum height of the foot.

The proposed device has a high reliability in operation.

Claims (1)

Invention Formula A device for disassembling a foot of flat objects containing a magazine for the foot, a roller feed mechanism and a pressure plate, characterized in that, in order to increase reliability, it has a means for changing the pressure of the pressure plate on the foot, containing a permanent magnet, a lever, and a hinge connected to the pressure plate, and a flat spring fixed on the lever and having the ability to interact with a permanent magnet. Sources of information taken into account in the examination: I. Pateit FRG number 1936535 cl. 42t "13/00, publ. 1972.