Conveyors: power-driven – Conveyor section – Reciprocating conveying surface
Patent
1990-07-12
1991-12-31
Olszewski, Robert P.
Conveyors: power-driven
Conveyor section
Reciprocating conveying surface
1987743, B65G 2500
Patent
active
050764195
DESCRIPTION:
BRIEF SUMMARY
The invention concerns a conveyor which facilitates the movement of heavy objects resting on the conveyor.
A conveyor of this type is known from SU-A-751726. Here, the rotatable links are formed as rods. Two of such pivoted rods are in the form of twin-arm levers pivoted to each other by a rigid tie on which there is a spacer co-acting with fixed stops and limiters as the load rises and falls. This is an extremely complicated and expensive construction which, due to said limiters, can only transport the heavy objects to the left.
The object of the invention is to provide a conveyor of the type stated in the opening paragraph which is simpler and cheaper to manufacture, which is easy to operate, and which can transport the objects both to the left and to the right.
This is achieved according to the invention in that the conveyor stated in the opening paragraph has an upper load carrying rod-shaped rail which can be easily moved laterally by simple mechanical apparatus.
The invention will be described more fully below with reference to the drawing, in which
FIG. 1 is a lateral view of the conveyor of the invention. The conveyor is shown partly in the raised position in broken lines in which an object resting on the conveyor can be transported to the right by a rod-shaped means. The conveyor is also shown partly in the lowered position in solid lines in which the rod-shaped means 2 of the conveyor may be moved back to the left without moving the object resting on the conveyor.
FIGS. 2 and 3 show a section of the conveyor in the lowered and raised positions, respectively.
FIGS. 4 and 5 show a vertical cross-section of FIG. 2 and FIG. 3, respectively.
FIGS. 6 and 7 show wheels to facilitate movement fixed at two alternative positions, and
FIGS. 8 and 9 show a vertical cross-section of FIGS. 6 and 7, respectively.
The conveyor shown in the drawing comprises a cross-sectionally U-shaped stationary means 1 whose opening faces upwardly.
The means 1 contains a rod-shaped means 2 which is connected to a rail 4 by means of a plurality of uniform rotatable links 3, only one of which being shown in the drawing. The connection between each of the rotatable links 3 and the rod-shaped means 2 consists of a rotatable pin 5, and the connection between each of the rotatable links 3 and the rail 4 consists of a corresponding rotatable pin 5. The distance between the rotatable pins 5 in the rod-shaped means 2 is the same as the distance between the rotatable pins 5 in the rail 4, so that the rod-shaped means 2 and the rail 4 form two parallel sides of a parallelogram, whose other sides are the rotatable links 3 or more particularly the distance between the two rotatable pins 5 in each link 3.
Stop means are provided to limit the movement of the parallelogram connection when the rod-shaped means 2 is displaced longitudinally with respect to the rail 4. These stop means are provided by forming the rotatable links 3 as parallelogram-shaped plates each parallelogram shaped plate having two obtuse angles, as shown in FIGS. 1, 2 and 3. In one extreme position which is shown in FIG. 3 and in which the rod-shaped means 2 is raised with respect to the rail 4, the two parallel sides a and c of the links 3 engage the rod-shaped means 2 and the rail 4, and in the other extreme position which is shown in FIG. 2 and in which the rod-shaped means 2 is lowered with respect to the rail 4, the two other parallel sides b and d of the links 3 engage the rod-shaped means 2 and the rail 4.
This parallelogram connection consisting of the rod-shaped means 2, the rail 4 and the connecting rotatable links 3 is journalled in the bottom of the stationary means 1, so that the parallelogram connection 2, 3, 4 can be moved horizontally to the right or to the left in FIG. 1.
To reduce the frictional resistance in the displacement of the parallelogram connection 2, 3, 4 in the stationary means 1, this parallelogram connection is provided with wheels 6 whose shafts 7 may be secured in one modification to the rail 4 (not shown) or, as shown in the drawing, integ
REFERENCES:
patent: 3451532 (1969-01-01), Manterfield
patent: 3590987 (1971-06-01), Evans et al.
patent: 4294347 (1981-10-01), Furlette et al.
patent: 4522297 (1985-06-01), Jaegers
patent: 4600099 (1986-07-01), Peddinghaus
Bidwell James R.
Comstore A/S
Olszewski Robert P.
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