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US5222857A
Expired / Lapsed
US
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Process and apparatus for picking up a load from a stack
Assignee: Murata Machinery Ltd
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Filing: 1992-06-01
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Granted: 1993-06-29
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Expires: 2012-06-01
Abstract
Abstract A process for picking up a load from a stack which includes the steps of calculating a height by which a pallet carrying a stack of layers of a load thereon will have to be raised to enable the upper end of the stack to reach a set level of height for detection, from input data on the height of each of the layers and the number of the layers; raising the pallet until the upper end is detected at the level; calculating the real height of each of the layers from the real height by which the pallet has been raised, and the number of the layers; raising the pallet incrementally by a height corresponding to a difference between the calculated real height and a preselected constant, and picking up the load from the uppermost of the layers by a table reciprocating at a fixed height; the incremental raising of the pallet and the picking up being thereafter repeated.
Inventors
- 👤 Atushi Hasegawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:08
CPC Classifications
B; B65; B65G; B65G59/00; B65G59/02; B65G59/023; B65G60/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
134 words
A process for raising a pallet carrying a stack of layers of a load thereon which comprises the steps of calculating a height by which a pallet carrying a stack of layers of a load thereon will have to be raised to enable the upper end of said stack to reach a set level of height for detection, from input data on the height of each of said layers and the number of said layers; raising said pallet until said upper end is detected at said level; calculating the real height of each of said layers from the real height by which said pallet has been raised, and said number of said layers; and raising said pallet incrementally by a height corresponding to a difference between said calculated real height and a preselected constant.
Claim 2
Dependent Claim
134 words
A process for raising a pallet carrying a stack of layers of a load thereon which comprises the steps of calculating a height by which a pallet carrying a stack of layers of a load thereon will have to be raised to enable the upper end of said stack to reach a set level of height for detection, from input data on the height of each of said layers and the number of said layers; raising said pallet until said upper end is detected at said level; calculating the real height of each of said layers from the real height by which said pallet has been raised, and said number of said layers; and raising said pallet incrementally by a height corresponding to a difference between said calculated real height and a preselected constant.
Claim 3
Dependent Claim
160 words
A process for picking up a load from a stack which comprises the steps of calculating a height by which a pallet carrying a stack of layers of a load thereon will have to be raised to enable the upper end of said stack to reach a set level of height for detection, from input data on the height of each of said layers and the number of said layers; raising said pallet until said upper end is detected at said level; calculating the real height of each of said layers from the real height by which said pallet has been raised, and said number of said layers; raising said pallet incrementally by a height corresponding to a difference between said calculated real height and a preselected constant; and picking up said load from the uppermost of said layers by a table reciprocating at a fixed height; said incremental raising of said pallet and said picking up being thereafter repeated.
Claim 4
Dependent Claim
160 words
A process for picking up a load from a stack which comprises the steps of calculating a height by which a pallet carrying a stack of layers of a load thereon will have to be raised to enable the upper end of said stack to reach a set level of height for detection, from input data on the height of each of said layers and the number of said layers; raising said pallet until said upper end is detected at said level; calculating the real height of each of said layers from the real height by which said pallet has been raised, and said number of said layers; raising said pallet incrementally by a height corresponding to a difference between said calculated real height and a preselected constant; and picking up said load from the uppermost of said layers by a table reciprocating at a fixed height; said incremental raising of said pallet and said picking up being thereafter repeated.
Claim 5
Independent Claim
87 words
An apparatus for picking up a load from a stack which comprises an unloading zone, a loading zone juxtaposed to it, a table which reciprocates between the unloading zone and the loading zone along a rail, and a control apparatus for controlling an operation of the whole apparatus, said control apparatus including a device for calculating the height by which a pallet has to be raised, a device for calculating the real height of each layer of a load and a device for detecting a wrong load.
Claim 6
Independent Claim
87 words
An apparatus for picking up a load from a stack which comprises an unloading zone, a loading zone juxtaposed to it, a table which reciprocates between the unloading zone and the loading zone along a rail, and a control apparatus for controlling an operation of the whole apparatus, said control apparatus including a device for calculating the height by which a pallet has to be raised, a device for calculating the real height of each layer of a load and a device for detecting a wrong load.
Claim 7
Dependent Claim
88 words
An apparatus for picking up a load as claimed in claim 3, wherein said unloading zone is provided with a conveyor for charging a pallet carrying a stack of layers of a load, a first lift for lifting the pallet to raise the load layer by layer to a level of height corresponding to that of the reciprocating table, a first load aligning device which asists the reciprocating table in picking up the load, a load height detector, and a lift position detector mounted on the first lift.
Claim 8
Dependent Claim
72 words
An apparatus for picking a load as claimed in claim 3, wherein said loading zone is provided with a second lift carrying an empty pallet and adapted to move down upon transfer of each layer of the load from the reciprocating table onto the pallet, a conveyor for discharging the pallet, and a second load aligning device which assists the unloading of the reciprocating table and aligns the load for its ejection.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-06-28 | 1996-12-28 | 1997-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-28 | 2000-12-28 | 2001-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-28 | 2004-12-28 | 2005-06-29 | $7700.00 | Window Closed / Lapsed |