US978565A - Lumber-stacker. - Google Patents

Description

- G. A. DBNISON.

LUMBER STAOKBB.

1221-1011-1011 FILED HA3. 5, 1910.

Patented Deb. 13,1910.

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c. A. DENISON. 1 LUMBER STAGKER. APPLICATION FILED MAR. 5, 1910.

Patented Dec.,13,1910.

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G. A. DENISON. LUMBER STAOKER.

APPLICATION 11,121) HA3. 5, 1910.

Patented Dec. 13, 1910.

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WITNESSES:

ATTORNEYS UNTTE ll CHARLES ALBERT DENISON, OF LOCKPORT, LOUISIANA.

LUMBER-STACKER.

Specification of Letters Patent.

@ Application filed March 5, 1910.

Patented Dec. 13, 1910.

Serial No. 547,580.

To all whom it may concern:

Be it known that 1, CHARLES ALnnR'r DENISON, a citizen of the United States, and a resident of Lockport, in the parish of Lafourche and State of Louisiana, have invented a new and useful Lumber-Stacker, of which the following is a full, clear, and exact description.

This invention relates to a new and improved device for piling lumber in stacks, and is particularly adapted to be used when the stack has reached a height of six or seven feet when it is inconvenient to continue the piling by manual labor.

The object of this invention is to provide a device which will be simple in construction, inexpensive to manufacture, strong, durable, and easily manipulated.

A further object of this invention is to provide a lumber stacker which may be adjusted so as to pile on either side, and which is adjustable so that it may pile to various heights.

These and further objects, together with the construction and combination of parts will be more fully described hereinafter and particularly set forth in the claims.

Reference is to be had to the accompanying drawings forming a part of this specification in which similar characters of reference indicate corresponding parts in all the views, and in which- Figure 1 is a side view in elevation; Fig. 2 is a front view in elevation; Fig. 3 is an enlarged detail view in elevation of the adjusting mechanism; Fig. 4 is a vertical section on the line 1 1 of Fig. 3; Fig. 5 is a fragmentary enlarged detail of one of the conveying hooks; Fig. (3 is a detached view in elevation of one of the skids in its extended position; Fig. 7 is a front view in elevation of one of the skids; Fig. 8 is an enlarged fragmentary view in elevation of the lower clamp on the skid; and Figs. 9 and 10 are detail perspective views of the clamp illustrated in Fig. 8.

Referring more particularly to the special features as illustrated in the drawings, 1 indicates the stack of lumber which is being piled by the stacker 2. The stacker 2 is provided with a carriage 3 which is preferably supported on wheels 4, so it may be carried about from place to place. The carriage 3 is provided with platforms 5 and 6 on each side thereof, which are adapted to aid in the loading of the lumber onto the stack. Extending downwardly at an angle to the platforms 5 and 6 there are provided aprons 7 and 8, which are adapted to guide the lumber into position on a conveyer 9. This conveyer 9 preferably consists of a pair of endless chains 10 and 11, spaced apart from each other and passing over sprockets rotatably supported at the top and bottom of the conveyer frame 12. The upper sprockets are connected by a shaft 13 so as to move in unison, and the lower sprockets are connected by a shaft 1-1 which is driven by a suitable reversible motor indicated at 15.

In order that the conveyer chains 10 and 11 may elevate the planks indicated at A, when they have been inserted between the conveyer 9 and either one of the aprons 7 or 8, they are provided with cated at intervals and preferably arranged in pairs extending in horizontal alinement on the two chains. The particular form of these hooks 16 is more clearly illustrated in Fig. 5. It will be seen by referring to this view that each of these hooks consists of a shank 17 which is secured in any suitable manner between the links of the chain, as by means of a pin 18. In order that the hooks may not wabble up and down there are provided flanges 19 and 20 extending from opposite sides of the shank 17 and abutting against the body of the links of the chain. At the outer end of the shank 7 there is provided a crescent shaped barb 21 which extends above and below the shank 17 so as to engage a plank and secure it be tween the barb and the chain no matter in which direction the chain is moving. It will thus be seen that if the conveyer is rotated with the hooks passing upwardly on the right hand side, these hooks can just as readily grip a plank as when they are moving in the opposite direction.

In order that the conveyer 9 may be swung to different angles with respect to the carriage 3, so that it can pile a stack on either side of the carriage 3 and at different distances from the carriage 3, the shaft 14 which supports the conveyer 9 on the carriage 3 is pivoted to the carriage 3 in any suitable manner. For the purpose of swinging the (conveyor 9 with respect to the carriage 3 there is provided a pinion 22, which is rotatably supported on the frame 12 and is adapted to engage a rack 23 on an arcuate member 24, which is secured in any wellhooks 16 loknown manner to the carriage 3. The pinion 22 is provided with a suitable operating means such as the hand crank 25, whereby it may be rotated and thus swing the conveyer 9 back and forth with respect to the carriage 3. In order that the cooperation of the pinion 22 with the rack 23 may be positive and no unlimited motion of the conveyer allowed, the arcuate member 24 is provided with a circular slot 26 which is engaged by a pin 27 on the frame 12. It will thus be seen that the conveyer can be swung to either side of a vertical line and to various angles with the carriage 3, so that it can be used to pile lumber on either side of the carriage, and at varying distances from the carriage.

When the conveyer 9 is tilted over to a considerable angle with respect to the vertical line, the planks A will tend to fall off of the hooks 16. In order to retain the planks in position on the hooks 16 there is provided one or more skids 28 which are adapted to cooperate with the chains 10 and 11 to keep the planks on the hooks 16. These skids are adapted to be secured to the stack 1 in a manner to be hereinafter described, and if a plurality are used are spaced apart from each other a suitable distance. The skid 28 consists of a pair of legs 29 and 30 pivotally connected to each other at the top as indicated at 31, so that they may be collapsed into a small space when in use and may be extended out so as to vary the angle between them, and thus allow for variations in the form of the stack 1, and variations in the angle at which the c0nveyer 9 is stacking. When in their extended position the legs 29 and 30 are held apart by means of a brace 32, which consists of a pair of members 33 and 34 having collars 35 and 36 slidingly mounted 011 the opposite member. In order to lock the members in any adjusted position, one of them is,

provided with a slot 37 which is engaged by a bolt 38 011 the other member which may be tightened up to secure the members 33 and 34 in relative positions of ad justment. The legs 29 and 30, similar to the brace 32, are each composed of two members 39 and 40 which are provided with collars 41 and 42 slidingly mounted on the opposite'member so that the members can be adjusted relative to each other to allow for any height of stack. One of these members in each leg is also provided with a slot 44 which is engaged by a bolt 45 on the other member, whereby the members may be locked in any relative adjusted position by tightening the bolt 45. At the top of the skid 28 a suitably braced platform 46 is provided, which is adapted to receive the planks from the conveyer 9 when they reach the top of the skid. Ordinarily when the conveyer 9 is tilted to any considerable cated adjacent the top and bottom of the skid. The particular form of these clamps is more clearly illustrated in Figs. 6 to 10. These clamps are similar and consist of a stationary jaw 50 and a movable jaw 51. The movable jaw 51 is provided with an opening 60, whereby it is slidingly mounted on the leg and is further connected thereto by means of a pin and slot connection. The movable jaw 51 is manipulated by a screw 52, which engages in a screw nut 53 secured to the leg 29. The screw 52 is pivotally secured at 54 to the movable jaw 51, and is provided at its opposite end with a suitable hand wheel 55 whereby it may be operated. The clamp 48 differs from the clamp 49 in that its hand wheel 55 is extended upwardly where it may be readily operated by the man on the top of the stack, while the hand wheel on the clamp 49 is extended downwardly where it may be readily operated by a man on the ground.

The operation of the device will be readily understood when taken in connection with the above description.

hen the stack 1 has been piled to such a height as can be conveniently done, by men on the ground, one or more of the skids 28 are secured to the stack by inserting the jaws in the clamps 48 and 49 on each side of a pair of transversely extending planks which are spaced apart from each other the required distance. The serrated surfaces of the jaws are caused to grip these planks firmly by means of the screws 52. 30 can be adjusted relatively to the leg 29 according to the angle at which the conveyer 9 is extended with respect to a vertical line, and according to the position of the stack. The legs are locked in this adjusted position by means of the bolt 38. The motor 15 is then started and the conveyer caused to lift the planks which are inserted between one of the aprons 7 and 8 and the chain. The skid 28 holds the planks on the conveyer hook until they reach the top where they are positively forced off by the cam bracket 47 on to the platform 46, where they can be removed by workmen on the pile and deposited in their proper position on the stack. As the height of the stack increases, the length of the skid can be adjusted by moving the members 39 and 40 relative to each The leg other and locking them in their new posi- 1 tion. If it is desired to stack on the opposite side of the carriage, the conveyer t) is swung over the means of the hand crank 25 so that it will incline in the opposite direction, and the motor is then reversed driving the conveyer in the opposite sense so that it will raise the planks on the opposite side of the device. The skid .28 can be readily changed to the stack on the opposite side of the carriage so that it will retain the planks on the hooks 16.

\Vhile I have shown one embodiment of my invention, I do not wish to be limited to the specific details thereof, but desire to be protected in the various changes, modifications and alterations which I may make within the scope of the appended claims.

Having thus described my invention, claim as new and desire to secure by Letters Patent:

1. In a lumber stacker the combination with a support, of a conveyer adjustably connected with said support, and a skid disposed apart from and cooperating with said conveyer to retain the lumber on said conveyer.

2. In a lumber stacker the combination with a support, of a conveyer on said support, means on said conveyer for engaging planks, and means on said conveyer for positively disengaging said planks.

3. In a lumber stacker the combination with a frame, of a conveyer on said frame, said conveyer having a plurality of hooks thereon adapted to engage planks, and a cam bracket adapted to positively remove said planks from said hooks.

4. In a lumber stacker the combination with a frame, of a conveyer adjustable to either side of said frame; means on said conveyer for engaging planks, and means on each side of said conveyer for positively disengaging said planks from said means.

5. In a lumber stacker the combination with a support, of a conveyer on said sup port, said conveyer having a plurality of hooks thereon extending in opposite vertical directions adapted to support planks on said conveyer, means for operating said conveyer in either direction, and means for positively disengaging said planks from said hooks in whichever direction said conveyer is pivoted.

6. In a lumber stacker the combination with a support, of a conveyer on said suport, said conveyer comprising a frame, a plurality of chains supported on said frame and adapted to operate in unison, and a plurality of hooks on said chains. said hooks being barbed in opposite directions so as to retain a plank on either side thereof.

7. In a lumber stacker the combination with a support, of a conveyer on said support, said conveyer comprising a frame,

a prising a plurality of chains mounted on said frame and adapted to operate in either direction in unison, a plurality of oppositely barbed hooks secured in pairs in horizontal alincment on said chains and adapted to engage a plank on either side, and cam brackets on each side of said conveyer adapted to positively disengage said planks from said hooks.

8. In a lumber stacker the combination with a support, of a conveyer adjustably connected to said support, means for ad justing said conveyer with respect. to said support, means on said conveyer for engaging planks, and a skid adapted to be secured to a stack for retaining said planks on said second-mentioned means.

9. In a lumber stacker the combination with a support, of a conveyer pivotally connected to said support, a conveyer, a 'ack on said support adapted to be engaged by said pinion, and means for rotating said pinion to adjust said conveyer to either side of said support.

10. In a lumber stacker the combination with a frame, of a platform on each side of said frame, an apron connected to each of said platforms, at conveyer adjustably supported on said frame between said platforms and said apron, a circular rack on said support, a pinion on said conveyer adapted to engage said ack, and means for rotating said pinion to adjust said conveyor.

11. In a lumber stacker the combination with a support, of a conveyor on said support adapted to elevate planks, a skid adapt ed to cooperate with said conveyer to retain said planks on said conveyer, said skids comprising a pair of legs adjustably connected together, and means for locking said legs in any adjusted position.

12. In a lumber stacker the combination with a support, of a conveyer on suppinion on salt sail port adapted to elevate planks, a skid adapted to cooperate with said conveyer to re tain the planks on said conveyer, said skid comprising a plurality of legs adjustably connected together, said legs being adjustable as to length. and means for locking said legs in any adjusted position.

13. In a lumber stacker the combination with a frame, of a conveyer on said-frame adapted to elevate planks, to cooperate with said conveyor to retain the planks on said conveyer, said skid comprising a plurality of relatively adjustable legs, means for locking said legs in their adjusted position, and means adapted to removably secure said skid to a lumber stack.

14. In a lumber stacker the combination with a support, of a conveyer on said support adapted to elevate planks, a skid adapted to cooperate with said conveyer to retain said planks on said conveyer, said skid complurality of members adjustable as a skid adapted to length, and clamps on some of said memsaid legs adapted to engage the transverse bers adapted to secure said skid to a lummember of a stack to support said skid on 15 ber stack. said stack, each of said clamps comprising 15. In a lumber stacker the combination a stationary jaw, a slidingly movable jaw,

5 with a support, of a conveyer on said supand a screw for manipulating said movable port adapted to elevate planks, a skid adaptjaw toward and from said stationary jaw. ed to cooperate with said conveyer to re- In testimony whereof I have signed my 20 tain said planks on said conveyer, said skid name to this specification in the presence of comprising a pluralityof relatively adjusttwo subscribing witnesses.

10 able legs, said-legs belng adjustable as to CHARLES ALBERT DENISON.

length, a platform supported on said legs, WVitnesses: means for locking said legs in any adjusted SoUnDAY O. F Ros'r, position, a plurality of clamps on one of CHARLES A. POGLENGHI.

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