US 3260380 A
Description (OCR text may contain errors)
y 1966 L. H. SKROMME ETAL 3,260,380
BALE WAGON 5 Sheets-Sheet 1 Filed Jan. 28, 1964 INVENTORS LAWRENCE H. .SKROMME 8 JOHN P. TARBOX 705 W AGENT July 12, 1966 Filed Jan. 28, 1964 L. H. SKROMME ETAL BALE WAGON 5 Sheets-Sheet 2 I N VENTORS LAWRENCE H. SKROMME 8 JOHN R TARBOX AGENT y 1966 1-1. SKROMME ETAL 3,260,330
BALE WAGON 5 Sheets-Sheet 3 Filed Jan. 28, 1964 INVENTORS LAWRENCE H. SKROMME 8 JOHN P. TARBOX bmQ NmQ
mm m6 AGENT United States Patent 3,260,380 BALE WAGGN Lawrence H. Slkromme, Lancaster, and John I. Tarhox,
Philadelphia, Pa, assignors to Sperry Rand Corporation, New Holland, Pa., a corporation of Delaware Filed .Ian. 28, 1964, Ser. No. 340,772 2 Claims. (Cl. 214-6) Our invention relates to automatic bale pickup and stacking machines. It has two major aims as follows:
(A) To develop an especially efficient method of stack layer interlocking, and a bale interlocked stack constructed by that method. Our method is especially adapted to the construction of such stacks by automation applied to various automatic and semi-automatic field, wagon or truck stacking machines, such for example as the so-called bale wagon disclosed in US. Patent to Grey No. 2,848,127, issued August 19, 1958.
(B) To modify and supplement certain of the mechanisms employed in this Grey automatic field stacker so as to enable it to carry out the method and construct the interlocked stack aforementioned.
The method consists in giving each of the layers of which the stack is to be composed the dimensions of a geometric square constructed of the same odd number of pairs of bales. A pair of bales meaning two bales extending lengthwise and abutting each other end to end. An odd number of such pairs are laid side by side to form a layer. The stack forming method consists in progressing at least one of said layers to and into the stack with its lengthwise end to end pairs of bales extending at right angles to the lengthwise end to end pairs of a next adjoining layer.
Both the truck stack and the ultimate ground stacks are embodied of layers laid according to the method. That is to say the layers are constructed of pairs of bales lying lengthwise end to end and the pairs lying side by side, but which stack contains at least one layer having its lengthwise pairs of end to end bales extending transversely of the lengthwise pairs of end to end bales of an adjoining layer. An ideal such stack is composed of alternate layers whose end to end pairs extend lengthwise in one direction and whose intervening layers are comprised of end to end pairs which extend lengthwise across the bales of the first named layers at right angles thereto.
While the method can be carried out by different types of automatic and semi-automatic field truck stackers (and sometimes by the employment of different mechanisms in one and the same type of stacker), we have chosen to illustrate herein but one of several mechanisms by means of which the method can be carried out in connection with the Grey stacker of Patent No. 2,848,127. In essence in this case the layer handling and progressing mechanism is provided with means to rotate alternate layers (or some other number) ninety degrees before transferring such layers to the truck stack, together with row and layer counting means and layer transfer means, each exercising a certain degree of control over the layer rotating means. Means of adjustment of the relative numbers of the different layers is also provided.
The accompanying drawings disclose not only this embodiment, but also the two right angular bale arrangements of the layers entering into the stack, and their combination, so illustrating both the method used and the heart of the stack construction. All of the drawings are intended to 'be but diagrammatic or semi-diagramn1atic, since we have used Greys FIGS. 1 and 2 merely for the purpose of illustration.
FIGS. 1 and 2 are respectively plan and side elevation views of the machine, showing in part and in suggested locations our modifying and supplementing devices. These views show only those portions of the Grey ma- 3,Z6@,38 Fatented July 12, 1966 chine involved directly in our invention. For showing and description of the remaining parts of the Grey machine reference should be made to the patent.
FIG. 3 is a diagram depicting symbolically our row, and layer handling and progressing system as applied to Grey, including the hydraulic motors used for power, the valves controlling their connections to the power source and th ir disconections therefrom, and the automatic devices controlling these valves.
FIG. 4 is a diagram in three parts designated respectively I, II and III; illustrative of the method and its use.
FIG. 5 is a perspective view of the head of the piston rod of the layer rotating motor.
FIG. 6 is an axial section of the valve of FIG. 3 showing its immediate connections in a position at right angles to its position in FIG. 3.
Referring now in detail to the drawings, layer I of FIG. 1 depicts a layer of five pairs of end to end bales as does also layer II of FIG. 1. The pairs of end to end bales of layer II are at right angle to the pairs of end to end bales of layer I. Therefore when layer II is placed against or over layer I without change of angular relationship as in part III of FIG. 4, all planes of division A to E of layer I are crossed at ninety degrees by bales of layer II and all planes F to I of division between bales of layer II are crossed by the right angularly extending bales of layer I. This is the result of using an odd number of pairs of end to end bales. The width or height of the bales, as the case may be, multiplied by the number of such pairs equals twice the length. In other words, either the width or the height is made commensurate by an odd number with twice the length, and the form of each of the layers is a square of the same dimensions.
T e truck stack (the load carried by the truck) when completed is erected by dumping and becomes the ground stack. In FIGS. 1 and 2 it is illustrated as incomplete. It contains four layers alternately of bale arrangements I and II of FIG. 4, the arrangements in the stack adjoining each other as in part III of FIG. 4. The frontal layer is of type I. This alternating arrangement of layer I and II, when the truck stack is up ended upon the ground constitutes a ground stack of maximum bale interlocking strength against parting in any plane passing through the stack between end to end or side by side bales. If the number of layers of either arrangement I or II is lessened while the number of layers of the other is increased the interlocking strength of the ultimate ground stack is decreased.
In the interest of clarity and brevity of description we have numbered the major truck components found in Grey as they are numbered in Grey. Thus, 1 is the truck chassis, 3 is the draw bar, 4 is the individual ground bale pick up, handling and progressing mechanism, 2t) are the tipping bars of this mechanism, 22 is the receiving bed which (together with appurtanent devices disclosed by Grey but not shown there) constitutes a bale row handling and progressing mechanism, 23 and 24 are respectively the journal shaft and bearings of receiving bed 22, 25 is its tilting motor, 3 3 the transfer bed, 35 and 36 respectively are its journal shaft and shaft bearings, 37 is the resting pad support of the bed, 38 the tilting motor for the transfer bed, 39 is the load carrying bed, 41) its hinge means, 42 is its resting pad, and 48 the upwardly extending tines which support the endmost layer of the truck stack during the building. Since Grey has applied general designation numerals only to his individual bale pick up mechanism, we shall generally designate the row handling and progressing mechanism (including its controls) as 96 (FIG. 1), the layer handling and progressing mechanism 97 (FIG. 2) and the load carrying the ground stack erecting mechanism 93 (FIG. 2). The truck operator is enabled to build a stacks of any of the various interlocking strengths when there is embodied in the truck our adjustable automatic layer building, and layer progressing mechanism.
In embodying our invention, no modification or supplementation of the Grey automation is made in connection with the mechanisms for operating and controlling of either his bale loading unit 4, or his truck stack load carrying and ground stack erecting unit 98. Nor do we modify his row handling mechanism 96. Reference to the patent may be made for the details of these mechanisms and their operations, as well as for any other information needful for understanding the unified parts of the Grey machine.
According to our invention (follow especially FIG. 3) there is added to the Grey device a row counting device 100 which operates a control valve 102. Counting device 100 is responsive to pivoting of bale receiving bed 22 of the row handling and progressing mechanism 96. The layer handling and progressing mechanism at large is modified by rendering transfer bed 33 rotatable by mounting it upon a central trunnion 104 carried by bed supporting member 105 and providing an intermittently operable ninety degree step by step bed rotating device 106. Both are mounted upon bed supporting frame 105. Added to these is a layer transfer counting device 108 controlling a duplex valve 110, and a duplex valve 112 both operable from supporting member 105 of transfer bed 33. There are provided such hydraulic control connections between the several valves specified and hydraulic cylinder motor 164 of rotating device 106 and tilting cylinder 38, together with such mechanical connections between the row and layer counting devices 100, 108, the rotating device 106, and the transfer table 33, as to constitute a system of control which takes the place of the transfer bed automation provided by Grey and shown in the upper part of his FIG. 10.
Description of the operation of our invention wil include detailed description of the elements involved and their relationships. As previously stated, FIG. 3 is a diagram symbolically depicting the bale stack building control system of this invention. It is believed that the operation of each of the elements will be readily apparent from FIG. 3 taken along with the following description with the possible exception of duplex valve 112. In one position of the core (not shown) of valve 112, port 167 (indicated by a solid line) connects hydraulic line 129 with hydraulic line 127 while port 166 (indicated by a solid line) connects hydraulic line 125 with hydraulic line 162. When valve actuating arm 126 moves from its solid line position to its dotted line position, the core of valve 112 rotates clockwise and other ports therein (shown in dotted lines) then connect both lines 127 and 162 with sump line 136. Thus the solid and dotted port indicating lines in valve 112 merely indicate the line connections that are made by that valve in each of the positions corresponding to the solid and dotted line positions of operating arm 126.
Operations effecting layers I In FIG. 3 the various parts are shown in full lines in the positions they occupy when the system is conditioned to rotate the transfer bed 33 ninety degrees when mechanism 96 progresses the layer completing row to bed 33. However, with the aid of FIG. 6 there will first be described the preceding operation which resulted in the erection on load carrying bed 39 of its frontal layer of arrangement I.
As clearly appears in FIG. 3 the row counting device 100 associated with the row handling and progressing mechanism 96 through an operating pawl 114 connected with receiving table 22, is operated one tooth of ratchet 116 of the counting device per row of bales delivered to transfer table 33 of the layer handling and progressing mechanism 97. It is held in the position to which it is so moved by a retaining pawl 118, for both pawls 114 and 118 are spring pressed to the ratchet teeth as is commonly done. The ratchet wheel 116 is shown in FIG. 3 as having counted four transversely extending rows of lengthwise end to end bales already delivered to transfer table 33, and these four rows are shown in full lines in FIGS. 1 and 2. Upon the progression of the fifth such row (shown in FIGS. 1 and 2 as being in process of formation) the ratchet 116 will have been moved five teeth and carried valve operating cam 120 which operates valve 102 to valve opening position, where it is held for the time being by retaining pawl 118 against biasing ratchet return spring 122. In this position earn 120 opens spring-closed valve 102 (spring not shown) and so connects hydraulic line 124 to the pump or other pressure source 32. Since valve 110 would then have been in the position shown in FIG. 6, this supplies pressure through the then open ports 126 and 127 of two way duplex valves 110 and 112 which are in series in line 124, 129, 127 to the tilting motor 38 connected to supporting frame 105 of bed 33 to transfer its now completed layer of transversely extending pairs of bales to the truck load carrying bed 39 of mechanism 98, by upward movement about journal shaft 35 of bed support 105 as described in the Grey patent. It is in this way that the frontal layer I was erected.
Upon this upward movement an arm 126 rigidly connected with the support 105 of table 33 disengages itself from the abutment 128 on a valve operating rod 130. The rod 130 is connected by crank 132 to operate valve 112 counterclockwise when the transfer bed is in its normal horizontal position, and upon or near completion of the upward tilting movement of bed 33. The arm 126 engages and moves abutment 134 of rod 130 to carry valve 112 clockwise, so breaking at port 167 connection of motor 38 to the source of power 32, and making connection of line 127 with line 136 to the fiuid reservoir or sump 68, as shown in FIG. 3 in dotted lines. Thus cylinder 38 is immediately relieved of its hydraulic pressure and transfer table 33 is returned to its normal position near the horizontal under the joint forces of spring 137 of tilting motor 38 and gravity and is ready to receive the next five-row layer. Upon movement of table 33, valve operating rod 130, through its connection with a bell crank 138, also pulls on a cable 140 connected with both actuating pawl 118 and holding pawl 114 and releases ratchet 116 of the row counter 100. (Note that throughout the drawings there are shown no release positions of any of the ratchet actuating or holding pawls and levers by which they are released, because such positions are well understood throughout the mechanical arts.) Released, the counter is returned by its spring 122 to its starting position with stop pin 142, which is carried by the ratchet, against stop 144 which is fixed in position. Pin 142 is located (in the case of the five-row layers we have chosen in illustration of our invention) five ratchet teeth back of the position it occupies when cam 120 opened valve 102. Restoration of counter 100 to its starting position allows valve 102 to close and cut off power from the source to line 124 until the next count of five bales has been made.
As transfer table 33 reaches or nears its normal position, arm 126 engages abutment 128 and moves rod 130 once more to the right. Valve 112 is turned counterclockwise, and bell crank 138 clockwise to their normal rest positions, so closing off line 136 from motor 38 to sump 68 and releasing pawls 114 and 118 for reengagement with ratchet 116 of row counter 100, and again interconnecting cylinder 38 through line 127, valves 112 and 110 to the source of power by Way of line 124 and valve 102. Because valve 102 is now closed however, line 124 is not pressurized, and bed 33 rests. This same return to normal position of transfer table 33 and its supporting arm 105 through a cable connection 146 with a lowermost bell crank arm 148, operates the now returned actuating pawl 150 of layer counting device 108 through a fixed oscillable lever 152 to move the ratchet wheel 154 one tooth forward. As illustrated this,
will bring pin 156 which projects from the face of ratchet wheel 154 into engagement with operating lever 158 of valve 110 controlled by the counting device. This engagement shifts the valve 110 to break power connection line 124 with transverse tilting motor line 127 at port 126 and makes connection from hydraulic power line 124 through the angular offset valve port 160 with line 125 which leads to hydraulic motor 164 of the transfer bed rotation device by way of a normally open port 166 of valve 112 and line 162. At this point the parts at rest occupy the positions illustrated in FIG. 3. In this position of valve 110 projection 221 from the valve is moved against the urge of valve return spring 220 away from stop pin 224.
Operations efiecting layers 11 We will assume that the four rows illustrated on table 33 in FIG. 2 have already been delivered just as in the case of the layer I followed through above. When the row handling and progressing mechanism 96 has delivered the next row of bales to the transfer bed 33, thereby completing the next layer, and counting device 100 has counted this number and projected cam 120 an angular distance equal to five teeth of its ratchet and again opened line 124 to source 32, power is now first supplied via port 160 of valve 110 and port 166 of valve 112 to the bed rotating cylinder 164 instead of first to bed tilting cylinder 38. Cylinder 164 is fixed by appropriate pivoting 168 to the under side of supporting and pivoting arm 105 of transfer bed 33, and is biased by spring 170 against fixed stop 172. Stop 172 aligns the head 174 (see FIG. 5) of piston rod 176 in its normal position always to engage with one of the four head receiving pickets 178 within the hook of hook-shaped teeth 180 of a four toothed ratchet-like disc 182 keyed to trunnion 104 of bed 33. Normally disc 182 is held in this aligning position by a spring biased locking pawl 184 whose head engages in one of the four ninety degree notches 186 of a locking disc 188 also keyed to trunnion 104. When piston 190 moves its rod 176 to the right under the admitted pressure it first engages and then passes over rearwardly ratcheting bell crank arm 200 of pawl 184 so disengaging the pawl from locking disc 188, and then engages in the aligned pocket 178. Continuing on to the end of its stroke it pushes disc 182 through ninety degrees and so rotates transfer bed 33 with its five row layer I of bales through ninety degree, so converting it to a No. II layer as shown on bed 33 by dotted lines numbered 11. The head 174 passes over and beyond arm 200 of pawl 184 before the ninety degree turn is completed, whereupon pawl 184 is pressed by its biasing spring 202 back toward its normal position to ride the head of the pawl on the periphery of locking disc 188 until the next notch marking the ninety degree shift reaches it, then spring 202 instantly snaps the pawl head into the notch, so locking the transfer bed in the ninety degree position to which it has been moved. The pairs of end to end bales which compose the layer shown in dotted lines as a layer of type 11 now extend at right angles to the pairs of bales which compose the preceding layer I shown in full lines, and so have progressed through their first stage of movement to the relative position they are to occupy in the truck stack where they are now to be progressed and erected.
The head 174 of the piston rod 176 at this juncture has engaged one arm of fixedly positioned bell crank 204 which is connected by a cable 206 with holding pawl 208 of layer counter 108, and through a short further extension 209 with actuating pawl 150 of the counter. Both pawls being spring biased to their ratchet engaging position, the pull cable 206 disengages both of them as bed 33 comes to rest, whereupon ratchet wheel 108 is released and returns (two teeth back in the adjustment illustated) to a normal position under the urge of its biasing spring 211. As illustrated this normal position is defined by the abutment of a stop pin 210 (see full and dotted circles of pin position) carried by ratchet 154 with the back of a count adjusting lever 212, pivoting about the same center as the center of the ratchet. Adjustment is had by a lever opera-ted holding pawl 214 and rack 216 as is well known in the arts. Each notch in the rack measures oft an angular increase or decrease of ratchet movement equal to one tooth. Return to normal by biasing spring 211, the pin 156, which has until now been in engagement with valve lever 158, moves two teeth counter-clockwise whereupon the biasing spring 220 of valve 110 reverses the valve, bringing the projection 221 from the valve against fixed stop 224. This ninety degree return valve movement cuts off power line connection 162 to rotating motor 164 at port 160 and makes power connection 129 from the line 124 to the line 127 of transfer bed tilting motor 38 via port 167 of valve 112 and port 126 of valve 110.
This results in the second step of progression of this layer II, and its being erected upon the load carrying platform adjoining the immediately preceding layer. This second step is illustrated as being in progress by dotted lines in FIG. 2, as the formed layer II is moved upward toward load bed 39. This dotted line showing also clearly 1 depicts the results of the first step, the rotating of the initially transverse end to end pairs of bales of layer I shown in full line on bed 33 through ninety degrees to constitute a No. II layer. When this second step is completed (as it has been upon all layers II shown as already in the truck stack) its pairs of end to end bales, like the others shown, will extend vertically across the bales of adjoining layers I. With the deposit of this layer II upon the bed, 39, as have been the preceding layers II, the method of our invention has been completely carried out; for in the truck load stack carried by bed 39 all layers occupy the positions relative to each other that they will occupy in the ground stack, and all planes of division between bales of layer I are crossed by bales of layer II. Dumping of this truck stack on end to the ground builds the ground stack of our invention.
It remains but to be noted that the movement of valve rod 130 by arm 126 of transfer bed support to its extreme left actuates valve 112 clockwise to simultaneously cut off power from tilting cylinder 38 and connect both motors 38 and 164 to the sump. At the same time bell crank 138 is moved clockwise and pulls on connection 140, so releasing counter 100 and closing valve 102; so cutting off all connection to the source of power. The return of piston 176 of motor 164 to normal position releases bell crank 204 thus restoring actuating and holding pawls 150 and 208 to once again engage the ratchet 154 of layer counting device 108. Therefore as bed 33 returns toward normal position pawl 150 moves ratchet 154 and its pin 156 one tooth clockwise to a position next to valve lever 158. From this position (that shown in full line in FIG. 3) it will once again actuate valve when the next layer I erected is counted. As transfer bed 33 reaches normal position abutment 128 is reengaged by arm 126, and valve rod is moved to the right, and valve 112 is shifted counterclockwise to its normal position, so restoring its connections 127 and 162 of motors 38 and 164 through lines 124 and 129 to valve 110. At the same time the clockwise movement of hell crank 138 by rod 130 releases actuating and holding pawls 114 and 116 of row counting device 100 to again engage ratchet 141 of the row counter 108.
While we have illustrated our system of bale stack interlocking as achieving the ideal of maximum interlocking (the two tooth movement setting of lever 212 cffecting alternate layer arrangements I and II), the layer counter 108 is at the same time illustrated as adjustable to vary the number of layers I which may precede or follow any given interlocking layer II. Simply by shifting stop lever 212 to one of the remaining notches in rack 216, counter 108 is set to count the corresponding number of layers I before pin 156 shifts valve 110 to introduce a single interlocking layer II.
Other sizes of bales and other numbers of rows of bales and bales in a row may be built into the stacker of our invention by correspondingly altering the dimensions of the beds 22, 33 and 39 of the respective row, layer and load handling and progressing mechanisms, and by adjusting the position of stop 144 of the row counter 100 to count the correspondingly desired number of rows which are chosen to constitute the layer. Likewise bales may be picked up by mechanism 4 and placed on bed 22 thickness side down instead of width side down and progressed through the machine merely by appropriate dimensional changes of the mechanism 4 and the successive beds. The drawings illustrate receipt by the bed 22 of bales width down and cut sides front with the ultimate result that the ground stack will be built with the width of bales presented to the sides of the stack and thickness cut or thickness sides of bales down. Placement of bales on bed 22 with cut side down will result in a ground stack composed of layers of bales whose width surfaces lie in transverse planes and whose cut sides are exposed to the weather on two of the outer sides of the stack.
By design the relative dimensions, positional relations, and journal shaft locations of beds 22, 33 and 89 will be chosen so as to avoid interference with the rotation of table 33. Obviously too, the timings of the relative movement of these beds will be adjusted to contribute to this same end. Should the Grey automation of the movements of receiving bed 22 as shown by him in his FIG. 10 be too slow to get bed 22 back far enough in advance to avoid interference with rotation of bed 33, counter 100 can be actuated upon the return to normal position of bed 22 instead of by its transfer movement as illustrated, so delaying the opening of valve 102 and the ensuring turning movement of bed 33. Obviously too, the locations and mountings of the elements of our invention upon the chassis, particularly the counters 100 and 108 and the associate and connected valves are also subject to the considerations of the machine designer and the type of truck stacker to which he applies our invention, our showings are purposely diagrammatic and symbolic. The spring retracted motors, the two-way valves and the counters are all intended to be symbolic, for many types of such hydraulic motors, valves and counters are well known to the art. Especially are double acting motors and four-way valves well known. Other motor means and other sources of power are likewise applicable as well known in the arts.
Adjustment of the fixed position of stop 144 of row counter 100 may be provided just as in the case of stop lever 212 of layer counter 108 if numbers of rows other than five are to constitute a layer. Suitable marginal stops 34 are provided on all margins of bed 33 to prevent bales from leaving the bed when under the centrifugal forces of rotation of the bed.
All modifications of our control system invention by means function-wise the equivalents of those we have disclosed herein, are intended to be covered by the annexed claims, irrespective of what may prove to be inapt terminology in view of our present lack of knowledge of what these modifications may prove to be.
Having thus described our invention, what We claim is:
1. A bale wagon comprising: a chassis structure; a receiving bed, a transfer bed, and a load-carrying bed ar ranged in tandem on said chassis structure; means for depositing a row of bales on said receiving bed; means for tilting said receiving bed to deliver rows of bales to said transfer bed to form a horizontal layer of bales thereon; means for tilting said transfer bed to an upright position at an end of said load-carrying bed to arrange said layer in a stack on said load-carrying bed; trunnion means journaiing said transfer bed on said transfer bed tilting means; means for turning said transfer bed ninety degrees about said trunnion means after formation of a horizontal layer of bales on the transfer bed; and control means for selectively actuating said turning means.
2. A bale wagon comprising: a chassis structure; a receiving bed, a transfer bed, and a load carrying bed arranged in tandem on said chassis structure; means for depositing a row of bales on said receiving bed; means for tilting said receiving bed to deliver rows of bales to said transfer bed to form a horizontal layer of bales thereon; means for tilting said transfer bed to an upright position at an end of said load carrying bed to arrange said layer in a stack on said load carrying bed; means on said load carrying bed moveable longitudinally thereof, for retaining said bales in stack form and to permit longitudinal displacement of the stacked bales as additional bales are delivered by said transfer bed; trunnion means journalling said transfer bed on said transfer bed tilting means for rotation about an axis perpendicular to the plane of said transfer bed; means for turning said transfer bed ninety degrees about said trunnion means axis after formation of a horizontal layer of bales on the transfer bed, whereby upon tilting of said transfer bed to deposit said turned layer in said stack on said load carrying bed, the individual bales of said turned layer will be angularly displaced ninety degrees relative to the bales of the preceding layer of said stack; and control means for selectively actuating said turning means.
References Cited by the Examiner UNITED STATES PATENTS 2,401,592 6/ 194-6 Von Stocker. 2,818,156 12/ 1957 Edwards. 2,848,127 8/ 1958 Grey. 3,050,199 8/ 1962 McGrath. 3,111,233 11/1963 Raynor.
GERALD M. FORLENZA, Primary Examiner.
MORRIS TEMIN, Examiner.