Conveyors: power-driven – Conveyor system for moving a specific load as a separate unit – System includes a rotating or endless carrier with a load...
Patent
1997-10-27
2000-02-15
Terrell, William E.
Conveyors: power-driven
Conveyor system for moving a specific load as a separate unit
System includes a rotating or endless carrier with a load...
198570, 19886708, 1984841, B65G 2900, B65G 1544, B65G 3700
Patent
active
060242078
DESCRIPTION:
BRIEF SUMMARY
Feed devices for a packaging machine are known from CH-A-412 708 (and its counterpart GB 1.060.219) or U.S. Pat. No. 4,068,756, which are incorporated as inherent components into the present application. Pushers spaced at uniform intervals are carried along by an endless, circulating chain. In the solution according to U.S. Pat. No. 4,068,756, pins onto which the pushers are inserted project laterally from each link of the chain. The interval can be changed through rearrangement of the inserted pushers. The length of the circulation path of the pushers must be a whole-number multiple of the interval. To achieve this, a loop used as a bypass for the pushers is formed at the lower run of the chain. The upstream deflection wheel of the chain can be adjusted in the conveying direction.
It is the object of the present invention to configure a conveying device of the type mentioned at the outset to be simpler than the solutions described above. This object is accomplished by the combination of the features of the claims.
An embodiment of the invention is described below in conjunction with the drawings. Shown are in:
FIG. 1 a schematic view in perspective of the device,
FIG. 2 a schematic side view,
FIG. 3 a cross-section,
FIG. 4 a detailed side view of a part of the device, and
FIGS. 4 and 5 plan views of a cutout.
The conveying device 1 shown schematically in FIG. 1 serves to feed products 2 (FIG. 2), for example groups of biscuits positioned on end, to a packaging machine 3, only indicated. The packaging machine can be a bag-forming, -filling and -sealing machine, for example according to EP-B-399 948, whose contents are explained as an integrated component of the present application. The packaging machine 3 has a supply roll 4 of wrapping-material film 5. At the downstream end, the products are wrapped with the film 5 at the end station 6 of the operating path 7 of the device 1. In the conveying direction A, downstream of the end station 6, the longitudinal edges 8 of the film 5 are sealed together by sealing and transport wheels 9, forming a loop around the products 2, which are spaced from one another. The wheels 9 are driven by a motor 10. The motor 10 is connected to a rotation-angle setter 11. Downstream of the wheels 9, the final sealing and separation into individual packages is effected with transverse sealing jaws equipped with separating blades.
The device 1 includes two parallel conveying chains 15, 16. At the end station 6, the chains 15, 16 are guided around two coaxial chain wheels 17, 18 of equal size. The wheels 17, 18 are driven by separate servo motors 19, 20, which each have an incremental rotation-angle setter 21, 22. The setters 21, 22 are connected to a control device 23 that controls the motors 19, 20 with respect to rpm and angle of rotation, as well as the motor 10 and the downstream motor, not shown, for the transverse sealing jaws. At the upstream end of the operating path 7, the chains 15, 16 circulate around coaxial deflection wheels 24.
Pushers 27, 28 and steadies 29, 30 are secured to a portion of the circumference, preferably over about half the circumference, of each chain 15, 16. For each chain 15, 16, the pushers 27, 28 are uniformly spaced from one another corresponding to the interval 31 in the section in which the chains 15, 16 are equipped with pushers. The spacing 32 between the pusher 27, 28 and the associated steady 29, 30 is likewise constant. A sensor 37 for detecting the passage of each pusher 27, 28 and/or each steady 29, 30, which all circulate in the same vertical plane, is disposed near, but in front of, the initial station 36. The sensor 37 is also connected to the control device 23. In the initial station 36, the products 2 are pushed, for example with a plunger, transversely to the transport direction A onto the conveying device 1.
As can be seen from FIGS. 3 through 6, a pin 39, 40 projects horizontally outwardly from each link of the chains 15, 16, that is, toward the side facing away from the other chain 16, 15. Pushing bodies 41, 42 and the steadies 29,
REFERENCES:
patent: 4068756 (1978-01-01), Loewenthal
patent: 4180154 (1979-12-01), Anderson
patent: 4768642 (1988-09-01), Hunter
patent: 5127209 (1992-07-01), Hunter
patent: 5337887 (1994-08-01), Greenwell et al.
patent: 5560473 (1996-10-01), Ivansco, Jr. et al.
Fluck Rene
Looser Walter
Bower Kenneth
Kelemen Gabor J.
SIG - Schweizerische Industrie-Gesellschaft
Terrell William E.
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