SE418725B - DEVICE FOR REPEATING A PRESCRIBED NUMBER OF WELLPAPP CHARACTER OR SIMILAR MATERIAL IN A BACK / STACK - Google Patents

Description

7903397-3 Because several substances stabilize each other during feeding under the stack, stability of the stack is ensured.

The invention is described in more detail with reference to an exemplary embodiment shown in the accompanying drawing, in which the figure shows a schematic side view of a device for enumerating cardboard blanks.

In the figure, I indicates a previous unit for aligning the box blanks. From this unit the blanks are discharged one at a time, end to end through a discharge opening 9 on a conveyor 10. The blanks are held down towards the conveyor 10 by a belt device 12, which also extends over the conveyor 11. The conveyors 10 and 11 are driven by the same motor (not shown), the latter 11 having about 203 higher speeds than the first 10. This provides a separation of the blanks, which creates a space between them which ensures the counting made by a sensing device 21, which t. ex. can consist of a _photocell connected to an electronic decadal counter (not shown).

From the conveyor 11, the blank passes over a breaking roller 13 to a slow-moving conveyor 14 and is transported on it towards a stopping device 15, which catches the leading edge of the blank and stops its movement.

The conveyor 14 runs slower than the conveyor 11. The breaking roller 13 is driven from the conveyor and its peripheral speed coincides with the linear speed of the conveyor 14. It is also provided with a free hub so that it can assume the same speed as the conveyor 11.

Because the conveyor 14 is slower than the conveyor 11, the trailing edge of a blank does not pass the breaking roller 13 before the leading edge of the next blank reaches the roller 13. This latter blank is therefore forced under the trailing edge of the first blank and an underlap arises.

The ratio between the speeds of the conveyors is chosen so that at least two blanks are always during transport between the breaker roller 13 and the stop 15. To help hold down the incoming blank, there is a pressure roller 13a, which is loaded downwards by a spring or similar means. .

Thanks to the underlap, a bundle is built up gradually from below.

To keep the bundle under control during construction, a retainer 17 of its own weight rests on the top blank of the bundle. The stop device 15 is operated in a known manner by a mechanism (not shown) which is controlled by an impulse from the previously mentioned decade counter, when the preset number of blanks is counted in the bundle. On this impulse, the stop device 15 is released so that it no longer holds the lower blank and thus the bun. When the mechanism reaches its lower position, a drive motor (not shown) starts for the ejector mechanism 16, which thereby describes a path schematically indicated by the dashed mark in the figure. The ejector arms 16a then approach the bundle from above-from the rear and eject the mouth and transfer it to a conveyor 18 driven by a separate, not shown motor, during the ejection movement, the arms 16a rest on their own weight on the sheet that is on its way in under the bwüßn and thus ensures that the lower sheet in the finished bundle also follows out.

Above the conveyor 18 and partly also the conveyor 14, a holding-down device 19 is arranged to keep control of the finished bundle during its transport on the conveyor 18. This device 19 consists of a number of non-driven rollers 19a, mounted in a frame 19b_which with adjusting screws 19c can be adjusted in height according to the height of the bundle.

Claims (3)

7903397-3 -Catent claims An apparatus for counting a predetermined number of cartons of corrugated cardboard or similar material in a bundle / stack, comprising - in the conveying direction - a first conveyor (10), a second conveyor (11), a breaking roller (13 ), a third conveyor (lä), which is coordinated with a stop device (15), a discharge device (16) operating above a first part of the third conveyor, a fourth conveyor (18), and one with the second conveyor coordinated sensing device (21), which is connected to an electronic counter, characterized in that the second conveyor (11) and the third conveyor (1 fl) form an angle with each other and that the third conveyor and the stopping device (15) are arranged to cooperate to build up the stack on the third conveyor, which is driven at such a speed in relation to the second conveyor (11) that a plurality of blanks under each other are simultaneously on the third conveyor between the breaking roller (13) and the stopping device (15), the roller (15) being driven at the speed of the third conveyor via a freewheel mechanism, which allows the roller to be driven at the speed of the second conveyor. Device according to claim 1, characterized in that the second conveyor (II) has a speed which is about 20% higher than the speed of the first conveyor (10). Device according to claim 1 or 2, characterized in that the second holding device (17) rests against its own weight against and holds down the top blank in the growing bundle and that this holder thus automatically falls onto the top blank. in the next bundle when the finished bundle is ejected by the dispenser (16). U. Device according to any one of the preceding claims, characterized in that the discharge device (16) is arranged to start when the stop device (15) has reached below the level of the third conveyor (lä), and that a discharge arm (16a) rests of its own weight on the box blank under the arm.