|Publication number||US2501961 A|
|Publication date||Mar 28, 1950|
|Filing date||Jul 28, 1948|
|Priority date||Jun 8, 1948|
|Publication number||US 2501961 A, US 2501961A, US-A-2501961, US2501961 A, US2501961A|
|Inventors||Paton James M|
|Original Assignee||Paton James M|
|Export Citation||BiBTeX, EndNote, RefMan|
|Non-Patent Citations (1), Referenced by (11), Classifications (6)|
|External Links: USPTO, USPTO Assignment, Espacenet|
J. M. PATON APPARATUS FOR ARRANGING ARTICLES ON CONVEYERS 2 SheetsI-Sheet 1 Jimszziar fa/7755171 222717 3r JMMZE ll'l' IIII I IIII' March 28, 1950 Filed July 28, 1948 IMP I! I ll March 28, 1950 2,501,961
APPARATUS FOR ARRANGING ARTICLES ON CONVEYERS 1.1. M. PATON 2 Sheets-Sheet 2 Filed July 28, 1948 ll lllIL-I IIIII llll JamwHPaiazz.
Patented Mar. 28, 1950 APPARATUS FOR ARRANGING ARTICLES ON CONVEYERS James M. Paton, Fort Williams, Ontario, Canadav Application July 28, 1948', Serial No. 41,136 In Canada June 8, 1948 3 Claims. I a
The invention relates to conveyors of the endless-carrier type for carrying crosswise of the carrier. elongated, approximately straight articles such as logs or lumber, and is concerned with apparatus for automatically arranging the articles in uniform crosswise: positionv on the conveyor.
Conveyors for elongated articles usually consist of parallel spaced apart endless chains each having a row of upward projecting members, called dogs, for engaging the articles and propelling them sideways along the conveyor. Each projecting memberin one chain is aligned transversely of the conveyor with a projecting member in the other chain, and each article is intended to lie at right angles to the direction of conveyance in front of a pair of transversely aligned projecting members. When an article is conveyed by transversely aligned projecting members, it is discharged in an orderly manner suitable for piling or feeding to a machine such as a saw. However, it often happens that an article becomes improperly located on the conveyor in front of one projecting member of one pair and the projecting member of the next leading pair on the opposite side of the endless carrier and, when discharged, the article is not in a proper position for piling or feeding to a machine.
According to the invention, apparatus is provided for automatically correcting the position of an article which is improperly located on the conveyor in the manner described by clearing the article from the leading projecting member so that the article will be engaged by a pair of transversely aligned projecting members. This apparatus comprises a pair of transversely aligned levers mounted one beside each of the rows of projecting members, resilient means normally holding the levers in upright position in the path of the articles propelled by the projecting members but adapted to allow the levers to pivot to positions below the projecting members when under the weight of an article, means in connection with each lever adaptedto lock the other lever after a given pivotal movement in the direction of travel of the conveyor in a position in which the other lever constitutes a skidway for clearing the article from a projecting member of the row beside said other lever, and means for releasing the locking means acting on one lever when the other lever is pivoted through said given degree.
The invention will be further described by reference to the attached drawings which illustrate an embodiment of it, and in which:
Figure 1 is a perspective view of a section of a horizontal type log conveyor fitted with apparatus according to the invention,
Figure 2' is a plan view showing the interlocking rods used in the apparatus according to the invention,
Figure 3 is a side view of the conveyor shown inv Figure 1', and
Figure 4 is a sectional view taken on the line 4-4 of Figure 3.
In the drawings, the conveyor shown is a horizontal type, double chain, log conveyor with log propelling dogs H3 inserted in each chain. ll and I2. The chains H and !2 are endless and driven along. tracks l3 and I4 which are supported by a conveyor framework l5. As shown in Figure l, 1
each dog IEI in chain I I moves in transverse alignment with a dog ll] in chain I2. A log I6 is shown being carried by the chains II and I 2 in front of one dog ll] of one transversely aligned pair and a dog ll] of the next leading pair of transversely aligned dogs In, and another log I! is shown being properly conveyed with its ends in front of a pair of transversely aligned dogs l0.
Levers l8 and I9 are pivotally mounted at points 20 and 2| respectively so that they may pivot from an upright position to a position below the chains II and I2. Levers I8 and I9 have slots 22 and 23 which are circular in shape with centres at the points 20 and 2 I respectively. Links 24, which are pivotally connected to each lever below the points 20 and 2|, connect to interlocking rods 26 and 21 through bell cranks 25. The rod 26 operated by the lever l8 passes through a bushing 28 in the frame member B5 to engage the lever I9 in its slot 23 and, in a similar manner, the rod 2'! operated by a lever I9 passes through a bushing 29 to engage the slot 22 in the lever l8. A spring 30 connects each lever l8 and I9 to the frame members l5 urging them into upright position.
In operation, a log carried in front of a pair of transversely aligned dogs (for example log I1) almost simultaneously strikes the levers l8 and I9 pivoting them forward and causing the bell cranks 25 to withdraw the interlocking rods 26 and 21 from engagement in the slots 22 and 23. Both levers are then free to pivot forward to a position below the chains II and i2, and the log I! is free to be propelled forward in the direction of conveyance. However, when a log becomes located on the conveyor in the slanting position of the log l6, shown in Figures 1 and 8, its forward end engages only the lever I 9 causing it to pivot forward and withdraw the interlocking rod 21 from the slot 22 in the lever l8. Since the lever down the skidway formed by the lever I9, coming.
to rest on the chain 12 in front of a dog l which is in transverse alignment with the dog propelling the other end of the log 16. The log 16 is then carried forward crosswise of the conveyor and strikes both levers substantially at the same time causing them to act in the manner described in connection with log l1. 1
What I claim as my invention is: 4
1. For use with a conveyor of the horizontal endless-carrier type having members projecting from the endless carrier in two spaced-apart longitudinal rows with the projecting members aligned transversely in pairs adapted to engage and propel an elongated approximately straight article along the conveyor while extending transversely thereof, apparatus for automatically correcting the position of an article which is positioned on the conveyor in front of one projecting member of one pair and the projecting member of the next pair on the opposite side of the endless carrier by clearing the article from the projecting member of the leading pair to bring the article in front of both projecting members of the other pair comprising, a pair of transversely aligned levers pivotally mounted one beside each of said rows of projecting members, resilient means normally holding said levers in upright position in the path of articles propelled by the projecting members but adapted to allow said levers to pivot to positions below the projecting members when under the weight of an article, means in connection with each lever adapted to lock the other lever after a given pivotal movement in the direction of travel of the conveyor in a position in which said other "lever constitutes a skidway for clearing the article from a projecting member of the row beside said other lever, and means for releasing the locking means acting on one lever when the other lever is pivoted through said given degree.
2. Apparatus as defined in claim 1 in which the meansin connection with each lever adapted to lock the other lever includes a pair of rods each operated by one of said levers, each of said levers having a slot below its pivotal axis in which'an end of the rod operated by the other of said levers is adapted-to be inserted to limit the pivoting of that lever to that necessary to provide the skidway for clearing the article from a projecting member of the row beside that lever when said other lever is in its upright position.
3. Apparatus as defined in claim 1 in which the conveyor is of the double chain type for conveying logs, and the projecting members are logpropelling dogs inserted in each chain.
JAMES M. PATON.
No references cited.
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|US3308923 *||Oct 22, 1965||Mar 14, 1967||Crawford Richard B||Article positioning device|
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|EP0412080A1 *||Jul 6, 1988||Feb 13, 1991||Hobart Corp||Package positioning apparatus and method.|
|EP0412080A4 *||Jul 6, 1988||Mar 13, 1991||Hobart Corporation||Package positioning apparatus and method|
|U.S. Classification||198/382, 198/399|
|International Classification||B65G47/24, B65G47/244|