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Publication numberUS3647045 A
Publication typeGrant
Publication dateMar 7, 1972
Filing dateFeb 6, 1970
Priority dateFeb 6, 1970
Publication numberUS 3647045 A, US 3647045A, US-A-3647045, US3647045 A, US3647045A
InventorsWegener Hans F
Original AssigneeNat Steel Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Apparatus for stacking units of sheet material
US 3647045 A
Abstract
An apparatus for stacking units of sheet material in staggered relationship including a receiver with end plates spaced apart a distance greater than the length of the sheet material to be stacked, a feed device for feeding individual sheets into the receiver, a positioning device in the receiver for directing individual sheets against one or the other of the end plates and a control selectively directing the positioning device to achieve staggered stacking of units of sheet material.
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Description  (OCR text may contain errors)

0 United States Patent 1151 3,647,045

Wegener Mar. 7, 1972 [54] APPARATUS FOR STACKING UNITS OF 2,998,187 8/1961 Wollar ..93/93 C SHEET MATERIAL 3,304,084 2/ 1967 Ashton .198/41 X 3,529,758 9/1970 Bern 198/41 X [72] Inventor: Hans F. Wegener, Mlchlgan C1ty, lnd. 1,099,186 6/1914 McKznnan 271/63 A [73] Assignee; National Steel Corporation 3,020,810 2/1962 Buccicone ..93/93 DP [22] Filed: Feb. 6, 1970 FOREIGN PATENTS OR APPLICATIONS PP- 9,184 1,078,503 3/1960 Germany .....214/6 DS 52 11.5.01 ..l98/4l, l98/DlG. 1 1, 271/63 A, 'j A- 93/93 C 93/93 DP, 93/93 K Attorney-Shanley and 0 Neil [51] Int. Cl. ..B3lb 1/96, B3 lb 1/98, B65b 57/20 58 Field of Search ..93/93; 198/41,DIG. 11, DIG. 13; 1 1 ABSTRACT 214/6 6 N; 271/18 1 A An apparatus for stacking units of sheet material in staggered relationship including a receiver with end plates spaced apart [56] References cued a distance greater than the length of the sheet material to be UNITED STATES PATENTS staclted, a feed device for feeding individual sheets into the receiver, a positioning devlce 1n the recelver for directmg m- 1,1 13,503 10/1914 Staude ..93/93 K dividual heets against one or the other of the end plates and 3, 111541451 9/ 1915 staude K control selectively directing the positioning device toachieve 2,133,264 l Wolff 93/93 C staggered stacking of units of sheet material. 2,918,852 12/1959 Buccicone ..93/93 2,960,243 11/1960 Beaulieu .214/6 N 13 Claims, 4 Drawing Figures PATENTEDHAR 11972 I 3,647,045

SHEET 1 BF 2 $1 m INVENTOR HANS F- WEGENER APPARATUS FOR STACKING UNITS OF SHEET MATERIAL BACKGROUND OF THE INVENTION In stacking sheet material for storage, packaging, processing or other purposes, it is common to stack the sheets in units of a predetermined number of sheets. These units are placed in staggered relationship such that they are in offset relation to units adjacent thereto. This provides means to readily determine the total number of sheets in a stack, separate known quantities of sheet material or to remove desired quantities for packaging or further processing thereof.

This invention relates to the automatic stacking of sheet material in units disposed in staggered relationship and to a new and improved apparatus for accomplishing such stacking.

Although described hereinafter as specifically applied to the handling of sheet metal, the invention, with relatively minor modifications, can be adapted to handle material of any type.

In a preferred embodiment, the invention is directed to the handling of galvanized sheet metal and comprises a receiver or pile-forming box with end plates spaced apart a distance greater than the length of the sheet material to be stacked; a feed means for feeding individual sheets into the receiver; a positioning means including electromagnetic rollers associated with the receiver to engage and direct sheets being fed into the receiver against one or the other of the end plates; and a control means to regulate the actuation of the rollers and thereby the direction of the positioning means to provide units, consisting of a number of sheets determined by the control means, having a staggered or offset relationship to adjacent units.

The objects and other advantages of the invention will become better understood to those skilled in the art by reference to the following detailed description when viewed in light of the accompanying drawings in which like components throughout the figures thereof are indicated by like numerals and wherein:

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic elevational view, in section, of an apparatus in accordance with the invention;

FIG. 2 is a fragmentary plan view of a portion of the apparatus of FIG. 1;

FIG. 3 is an enlarged fragmentary view similar to FIG. 1 showing the apparatus in one phase of operation thereof; and

FIG. 4 is a view similar to FIG. 3 showing the apparatus in another phase of operation thereof.

DESCRIPTION OF THE PREFERRED EMBODIMENT In FIGS. 1 and 2, a receiver or pile-forming box, indicated generally at 10, consists of a bottom 12, end walls or plates 14 and I6 and sidewalls l8 and 20. At least one of the sidewalls 18 or 20 is hingedly connected to the bottom 12 such that the wall can be swung into coplanar relationship thereto to provide access to the interior of the receiver for withdrawal of material therefrom. The receiver 10 is preferably provided with a pallet or removable bottom 22 therein to facilitate removal of material as will be described in greater detail below. The sidewalls 18 and 20 of receiver 10 are spaced apart a distance about equal to the width of the sheets to be piled. The end walls 14 and I6 are spaced from one another a distance greater than the length of the sheet material to be received therebetween.

A feed means, comprising an inclined plate 24, is disposed over one end of the receiver 10 to feed individual sheets of material to be stacked therein. As can be seen in FIG. 1, the front edge of an initial sheet 260 slides along the upper surface of the pallet 22 toward the end plate 16 as the sheet is fed into the receiver. Succeeding sheets similarly slide across the upper surface of the preceding sheet as they are fed into the receiver.

A positioning means, shown generally at 28, is disposed proximate the other end of the receiver 10. This means com- 38, selected to be slightly less than the effective weight of the means 28 for normal slight biasing thereof downwardly toward the bottom of the receiver 10, is attached to the free end of the pulley-cable 36 to suspend the means 28.

The frame 34 is provided with a guide roller structure 40 supported horizontally therefrom and extending through and engaging both sides of the end plate 16 to maintain the horizontal position of the positioning means 28. A feeler roller 42 extends forwardly and downwardly from the frame to engage the sheet material being fed into the receiver 10 and elevate or vertically position the positioning means 28 as the receiver fills with sheet material. The roller 42 is positioned at a small distance below the rollers 30 and 32 such that these latter rollers are normally spaced from engagement with the upper surface of the sheet material in the receiver 10.

The roller 42 serves an additional function in that each sheet material being fed into the receiver 10 will normally ini tially tend to float on a cushion of trapped air. The roller 42 serves to press this sheet downwardly into engagement with the next lower sheet. I

A pair of drive motors 44 and 46, preferably electrically powered, are mounted on the frame 34 and drivingly connected to corresponding rollers 30 and 32 by means of pulleydrive belt arrangements 48 and 50 respectively. The motors 44 and 46 are designed to rotate in opposite directions such that, for example as seen in FIG. 1, the roller 30 is rotated in a counterclockwise direction while the roller 32 is rotated in a clockwise direction. Other drive means, such, for example, as a single power source driving the rollers through divided, reversed pulley systems, could obviously be substituted for the system illustrated without exceeding the scope of this inventton.

In the preferred embodiment, the motors 44 and 46 are continuously energized during operation of the device so that the rollers 30 and 32 are in constant opposing rotation.

This invention is specifically directed to apparatus for the handling of galvanized sheet steel. With such material, or with any other ferrous or magnetic material, it is preferred that the rollers 30 and 32 incorporate electromagnets to provide selective magnetic gripping of the sheet material for purposes to be described in greater detail below. As used herein, the term magnetic" as used in conjunction with the material handled, means a material which, by its composition,-.is subject to magnetic influence. If, however, the invention is to be utilized with.

other than magnetic materials such, for example, as nonferrous metal, plastic, paper products or the like, the rollers would be provided with openings over the surfaces thereof and be connected to a source of vacuum to grip the sheet material in the same manner that is accomplished by the electromagnets specifically described.

The electromagnetic rollers 30 and 32 are connected to a switch 56, mounted on the frame 34 which, in turn, is connected to a source of electric power 57 (FIGS. 3 and 4). The switch is preferably of a two-position, solenoid-actuated type to provide alternate energization of either roller 30 or roller 32 according to the positioning of the switch.

The switch 56 is connected to a control 60 which, in turn, is connected to a counter 62. The control 60, actuated, for example, by signals from the counter, serves to alternately position the switch 56 to thereby reverse electromagnetic energization of the rollers 30 and 32.

The counter 62 is connected to a pulse generating switch 64 which is actuated by a mechanical foot 66 positioned over the feed means 24. The foot is displaced by sheet material passing thereunder in such a manner as to send a signal to the counter each time .a sheet of material to be stacked is fed to the receiver I0. The counter 62 is adjusted to signal the control 60 and reverse energization of the rollers 30 and 32 when a desired number of pulses is received thereby. The counter 60 is preferably variable so that the number of pulses required to reverse energization of the rollers may be adjusted as desired. In this way, the number of sheets making up each unit can be varied as desired.

Referring now to FIG. 3, a first cycle of operation of the apparatus is illustrated. In the configuration of FIG. 3, the switch 56 is positioned so that roller 30 is energized and in such case sheets being delivered to the receiver each have a portion lifted slightly into engagement with the roller 30 and, due to the counterclockwise rotation thereof, are directed against the end plate 16. A unit of sheets 260 through 26: is thereby being formed against that end plate. Rotation and energization of the roller is continuous as long as the switch 56 is in the configuration of FIG. 3 so that each sheet 260 to 26i will be moved along in controlled fashion until the leading edge thereof abuts the end plate 16 after which time it will be maintained in contact with the end plate due to continued frictional contact with the roller 30 until the next sheet 26j intervenes therebetween. Such continued contact eliminates the bounce back which might occur if the sheet were freely delivered against the end plate.

After the feeding of a predetermined number of sheets (10 are illustrated), as determined by the setting of the counter 62, a signal is sent by counter 62 to the control 60 and the switch 56 is actuated to the configuration of FIG. 4 thereby reversing energization of the rollers so that roller 30 is deenergized and roller 32 is energized. In this configuration, the sheets being fed into the receiver 10 are engaged by the roller 32 and, due to the clockwise rotation thereof, are displaced until the trailing edge thereof engages the end plate 14 so that a unit of sheets 26k through 26n is being formed against that end plate, offset or in staggered relationship to the first formed unit of sheets 260 through 26j; The stacking of sheets in offset units is continued as above until the desired height of the pile or the capacity of the receiver 10 is reached. As an alternate, the receiver can be provided with a vertically movable or moving floor such that the floor can be continuously moved downwardly as sheet material is deposited thereon. When the capacity of the receiver 10 is reached, wall 18 is lowered to coplanar relation with the floor 12 for pickup of the pallet 22 and stacked sheet material by a fork lift or other material handling means.

It will be obvious that instead of each of rollers 30 and 32 turning in the same direction but opposite to the direction of the other roller and being alternately energized magnetically during the first and second cycles of FIGS. 3 and 4 respectively, the same desired result could be accomplished by continuously energizing both rollers magnetically and driving the rollers first in a counterclockwise direction at the time of the first cycle of operation illustrated in FIG. 3 and then driving the rollers in a clockwise direction when they are in the second cycle of operation illustrated in FIG. 4. Operating in this manner both rollers 30 and 32 could work together or one could be eliminated altogether. Also the electromagnetic means need be energized only during the first and second cycles and not continuously.

With either method of operation, viz unidirectional rotation of the rollers during the first and second cycles or reversed rotation of the rollers during the first and second cycles, the counting mechanism actuates the sheet positioning mechanism to reverse the direction of the action thereof on the sheets entering the receiver.

Although the invention has been described in connection with a preferred embodiment, modification of that embodiment can be made without departing from the principles of the invention. Such modifications are within the scope of the appended claims.

I claim:

1. An apparatus for stacking units of sheet material in staggered relationship comprising a. a receiver having end plates at opposite ends thereof, said end plates being spaced from one another a distance greater than the length of said sheet material,

b. feed means disposed to feed the sheet material in individual sheets into the receiver,

c. sheet-positioning means comprising at least one rotating roller means associated with the receiver having an axis of rotation normal to the path of sheet material fed thereto, and means associated with the roller means to cause the roller means to grip the topmost sheet received by the receiver and move it in a horizontal plane into engagement with one of the end plates, and

d. control means to actuate the sheet positioning means selectively to position each sheet against a desired one of the plates.

2. An apparatus for stacking units of sheet material in staggered relationship comprising:

a. a receiver having end plates at opposite ends thereof, said end plates being spaced from one another a distance greater than the length of said sheet material,

b. feed means disposed to feed the sheet material in individual sheets into the receiver,

c. sheet-positioning means disposed to engage each of the sheets fed to the receiver and to selectively move each sheet to place an edge of each sheet against one of the end plates, and g d. control means to actuate the sheet positioning means selectively to position each sheet against a desired one of the end plates, including a counting means to actuate the positioning means selectively to position a plurality of sheets in engagement with a desired one of the end plates and then to position a plurality of sheets in engagement with the other one of the end plates.

3. An apparatus in accordance with claim 1 wherein the sheet material is magnetic and wherein the means associated with the roller means comprise an electromagnet.

4. An apparatus for stacking units of magnetic sheet material in staggered relationship comprising:

- a. a receiver having end plates at opposite ends thereof, said end plates being spaced from one another a distance greater than the length of said sheet material,

b. feed means disposed to feed the sheet material in individual sheets into the receiver,

c. sheet positioning means comprising at least one rotating roller means associated with the receiver having an axis of rotation normal to the path of the sheet material fed thereto, and means comprising an electromagnet associated with the roller means to cause the roller means to engage the topmost sheet received by the receiver for movement of the topmost sheet by the roller means into engagement with one of the end plates, and

(I. control means to actuate the sheet positioning means selectively to position each sheet against a desired one of the end plates, including a counting means to actuate the sheet-positioning means selectively to position a plurality of sheets in engagement with a desired one of the end plates and then to position a plurality of sheets in engagement with the other one of the end plates.

5. An apparatus for stacking units of magnetic sheet material in staggered relationship comprising:

a. a receiver having end plates at opposite ends thereof, said end plates being spaced from one another a distance greater than the length of said sheet material,

b. feed means disposed to feed the sheet material in individual sheets into the receiver,

c. sheet-positioning means comprising at least one rotating roller means associated with the receiver having an axis of rotation normal to the path of the sheet material fed thereto, and means comprising an electromagnet as sociated with the roller means to cause the roller means to engage the topmost sheet received by the receiver for movement of the topmost sheet by the roller means into engagement with one of the end plates, and

d. control means to actuate the sheet-positioning means selectively to position each sheet against a desired one of the end plates, including a counting means for reversing direction of the action of the electromagnet aridrol'ler means after receipt of a predetermined number of the sheets in the receiver.

6. An apparatus for stacking unitsof sheet'material in'staggered relationship comprising:

a. a receiver having end plates at opposite ends thereof, said end plates being spaced from one another a distance greater than the length of said sheet material,

b. feed means disposed to feed the sheet material in individual sheets into the receiver,

c. sheet-positioning means comprising at least one rotating roller means associated with the receiver having an axis of rotation normal to the path of the sheet material fed thereto, and means associated with the roller means to cause the roller means to engage the topmost sheet received by the receiver for movement of the topmost sheet by the roller means into engagement with one of the end plates, and

d. control means to actuate the sheet positioning means selectively to position each sheet against a desired one of the end plates, including a counting means to actuate the positioning means selectively to position a plurality of sheets in engagement with a desired one of the end plates and then to position a plurality of sheets in engagement with the other one of the end plates.

7. An apparatus for stacking units of sheet material in staggered relationship comprising:

-cl. control means to actuate the sheet-positioning. means selectively to position-each sheet against a desired one of the endplates.

8. An apparatusJh-accordance with claim 7 wherein the sheet positioning means include means for holding each of the sheets in frictional contact with the sheet positioning means whereby the sheet positioning means is enabled to move each sheet into engagement with one of the end plates.

9. An apparatus in accordance with claim 7 wherein the control means include means to actuate selectively alternate ones of the roller means to altematethe direction of move ment of the sheets as a function of the direction of rotation of the roller means energized.

10. An apparatus in accordance with claim 7 wherein the control means include a counting means to actuate the positioning means selectively to position a plurality of sheets in engagement with a desired one of the end plates and then to position a plurality of sheets in engagement with the other one of the end plates.

11. An apparatus in accordance with claim 8 wherein the control means include means to actuate selectively alternate ones of the roller means to alternate the direction of movement of the sheets as a function of the direction of rotation of the roller means actuated.

12. An apparatus in accordance with claim 6 wherein the roller means include means for holding a sheet in frictional contact with the roller means'whereby rotation of the roller means moves each sheet into engagement with one of the end plates.

13. An apparatus in accordance with claim 6 wherein the control means include a counting means to actuate the positioning means selectively to position a plurality of sheets in engagement with a desired one of the end plates and then to position a plurality of sheets in engagement with the other one of the end plates.

Patent Citations
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US1099186 *Nov 28, 1913Jun 9, 1914Eugene MckennaRotary carrier.
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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4635920 *Jul 22, 1985Jan 13, 1987Ricoh Company, Ltd.Selective sheet loading apparatus
US4718657 *Nov 28, 1984Jan 12, 1988Delphax SystemsPaper stacker
US5033731 *Mar 12, 1990Jul 23, 1991Xerox CorporationDual mode stack height and sheet delivery detector
US5096370 *Oct 3, 1990Mar 17, 1992Wolfgang MohrDevice for the transfer of a part stack of material in sheet form from a general stack to a further-processing station
US6991228Mar 28, 2003Jan 31, 2006Oce-Technologies, B.V.Sheet depositing device
US7828280 *Jan 26, 2007Nov 9, 2010Samsung Electronics Co., Ltd.Paper feeding apparatus and image forming apparatus having the same
EP1348662A1 *Mar 29, 2002Oct 1, 2003OcÚ-Technologies B.V.Sheet depositing device
EP1348663A1 *Mar 18, 2003Oct 1, 2003OcÚ-Technologies B.V.Sheet depositing device
Classifications
U.S. Classification271/207, 271/193, 414/791.2, 414/789.1
International ClassificationB65H33/08, B65H33/00
Cooperative ClassificationB65H33/08
European ClassificationB65H33/08