DE1261132B - Device for separating sheets from a stack - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. α .:

B 41g

German class: 15 e- 5/01

Number: 1261132

File number: B 86888 VII b / 15 e

Filing date: April 29, 1966

Open date: February 15, 1968

The invention relates to a device for separating sheets of a stack of spread out sheets Sheet with the help of a driven separating friction roller on the other side of the sheet feed path an eccentrically mounted retaining roller is opposite, its effective distance from the separating roller is continuously adjustable. The known device allows the adjustment of the Passage gap by a rotating adjustment movement. However, it does not offer the option of Start working with small step differences for thin layers of paper. Required for thin layers of paper therefore the setting of the passage gap is particularly dexterous. Also is that structural design in the known device inevitably somewhat cumbersome.

The object of the present invention is to improve the known device in such a way that that a very sensitive adjustment of the roller distance in connection with a limited and reproducible actuator movement can be achieved. The solution to this problem is provided by the Invention achieved in that with the smallest distance between the two rollers, the center of the retaining roller lies in the plane which is limited by the separating roller axis and the retaining roller axis is, and further in that the adjusting means for adjusting the distance directly on the retaining roller axis sits. The training according to the invention not only improves the possibilities the adjustment of the nip. The structural design and operation are also improved as a result, that the adjustment means outside the machine body on the operating side of the device can be arranged. In one embodiment of the invention is accordingly an outside of the Machine frame located dial knob with a serrated disk, a rotary axis and the eccentric mounted retaining roller connected to each other in a rotationally secure manner by driving pin, with a Fixed serrated washer elastic, but form-fitting with the serrated washer by means of Coil spring is coupled. In another embodiment of the invention, the eccentricity arranged at another point of the transmission organs. In this embodiment, the Eccentricity also incorporated into the two bearing points of the shaft in the area of the frame walls, whereby the backing roll with the bushing is centered on the shaft.

The subject matter of the invention is illustrated in the drawings as follows.

Device for separating sheets of a
Stack

Applicant:

Mathias Bäuerle

Company with limited liability,

7742 St. Georgen

Named as inventor:

Erwin Porth, 7742 St. Georgen

Fig. 1 cross section through the stacking table, separating device and folding rollers;

F i g. 2 has the same arrangement as FIG. 1 with manual feed of single sheets;

F i g. 3 shows a sectional view of the actuating device with a handle;

F i g. 4 is a front view of the separating device;

F i g. 5 and 6 show different adjustment positions;

F i g. 7 shows an enlarged eccentric scheme.

The devices according to FIG. 1 have a downward sloping stacking table 1 on which the stack of paper 2 is formed like scales. Two lateral guide angles 3 give the stack the direction. In each case the top sheet 4 is grasped by the feed roller 5, which is designed as a freewheel and through the passage gap 6, which can be varied by means of eccentrically adjustable retaining rollers 7 is pulled through and fed to the folding rollers 8 and 9.

In Fig. 2 is the same arrangement as in FIG. 1, with the difference that a multi-sheet set of paper, e.g. B. a three-sided letter is inserted by hand. For this purpose, the passage gap 6 is enlarged so far that the feed roller 5 cannot exert any tension on the paper sheets and the set is fed directly up to the folding rollers 8 and 9. By rotating the axis 11 and the retainer roller 7 eccentrically mounted thereon, the passage gap 6 can be enlarged or reduced as desired. The feed roller 5 is driven by shaft 12 via drive pulley 13. Shaft 12 and adjusting axis 11 are mounted in frame side plates 14 and 15 of the folding machine. On the adjusting handle 16, which is provided with a serrated shoulder 17 and is in engagement with the fixed toothed washer 18, can

809 508/93

the adjusting axis 11 and the eccentric 19 attached to it with the retaining roller 7 depending on the paper thickness to adjust. The eccentricity 20 of the retaining roller? to adjusting axis 11 is 0.4 mm. One Rotation of the handle 16 by 180 ° therefore causes that the passage gap 6 is variable from 0 mm to a maximum of 0.8 mm and so the paper thickness of the Arch can be customized.

A section through the adjusting mechanism according to the invention is shown in FIG Pin 21 of the adjusting axis 11 by means of screw 22 and driving pin 23 non-rotatably and firmly connected. the with the frame side part 14 firmly connected socket 18 has a serration 24 into which a also serrated socket 17 engages, wherein the driver pin 23 and the pin 21 engage in the groove 25 and thus a rotary connection with Adjusting axis 11 is present. When turning the handle, the serrated bushing can? in the direction Dodge arrow 26, the compression spring 27 forms the restoring force.

Experiments have found that a self-locking eccentric adjustment of the counter-pressure roller 7 with an eccentric of 0.4 mm is given when the serrated washers 17 and 18 are made of plastic are made and have a tooth depth of 0.8 mm ', the compression spring 27 having a wire thickness of at least 2 mm in order to create the necessary counterforce.

In Fig. 5 shows a position for a passage gap 6, which corresponds to a paper of 100 g / m². Pointer 28 of the handle 16 points to the corresponding number on the scale 29.

In Fig. 6 the handle is set for a paper quality of about 200 g / m2. The corresponding Passage gap 6 between retaining roller 7 and feed roller S allows the corresponding sheet of paper 4 happen.

F i g. 7 shows on the basis of a diagram that the setting stages for the eccentric from the fine steps 30 and 31 to coarser steps, e.g. B. 32 and 33, pass over. The largest eccentric deflection is indicated by arrow 34 and can be 0.8 mm.

Claims (3)

Patent claims: 1. Device for separating sheets of a stack of spread sheets with the aid of a driven one Separation friction roller, which is eccentric on the other side of the sheet feed path opposite mounted retaining roller, whose effective distance to the separation roller is continuously adjustable, characterized in that with the smallest distance between the two Rolls the center of the retaining roll (7) lies in the plane that passes through the separating roll axis (12) and the retaining roller axis (11) is limited, and further in that the Adjusting means (16) for adjusting the distance is seated directly on the retaining roller axis. 2. Apparatus according to claim 1, characterized in that one outside of the machine frame located dial knob (16) with a serrated washer (17), a rotation axis (11) and the eccentrically mounted retaining roller (7) by means of the driver pin (23) in a rotationally secure manner against one another is connected and a fixed serrated washer (18) is elastic, but form-fitting is coupled to serrated washer (16) by means of a helical spring (27). 3. Apparatus according to claim 1 or 2, characterized in that the eccentricity (20) is also incorporated into the two bearing points of the shaft (11) in the region of the frame walls (14 and 15) and the counter-holding roller (7) with bushing (19) is centered on the shaft (11). Considered publications:
British Patent No. 528 271. 1 sheet of drawings 809 508/93 2.68 © Bundesdruckerei Berlin