US1774052A - Extension haystacker - Google Patents

Description

Aug. 26, 1930. H, COPE 1,774,052

EXTENSION HAYSTACKER Filed May 15. 1929 2 Sheets-Sheet 1 gwuzntoz L L L L f4 fi e.

Aug. 26, 1930.

J. H. COPE 1;774,o52

EXTENS ION HAYSTACKER Filed May 15, 1 929 2 Sheets-Sheet 2 75 77 .5129v I I g. J z 7 94/ T /8 /a e a 6 2/02.

Patented Aug. 26, 1930 i v UNITED STATES PArENrtoFFIcE I JOSEPH 1i. corn, on DENVER, COLORADO 1 nxrnnsron HAYSTACKER.

'. Application filed May 13, 1929. Serial 1T0. 362,664.

I This invention relates toximprovements in.

1 extension haystackers of the type described andclaimed in my copending application Serial No. 247,179, filed January 16, 1928.

B Itis the object of this invention to produce a liaystacker of the extension type whichshall be so constructed that the parts that are subjectedto severe strains will be so made that.

the timbers cannot split and which shall be provided with means for limiting the throw of the stackerhead and for stopping the same without subjecting the pivots about which the stackerhead moves to the severe strains towhich they are. subjected in the usual construction. 1 I

"It is a further object of this invention to provide an improved connection between the stackerhead extension frame arms andthe lifter bars that will obviate the danger of splitting the arms and which will also permit the arms to be twistedso as to properly adjust them.

The above and other objects. which will;

become apparent as the description proceeds I matter of this invention is provided with a are attained by means of the construction and an arrangement of parts that will now be described in detailrreferencefor thispurpose being had .to the accompanying drawings in which the preferred embodiment of them vention has been illustrated and in which: Fig. 1 is a top plan view of the improved extension stacker; 7

Fig. 2 is a side elevation of the stacker shown in Fig. 1;

Fig. 3 is a side elevation showing the stacker with the stackerhead in elevated position;

Fig. 4 is a section taken on line 44,

T si Fig. 5. is a section taken on line 5'5 Fig.

2; and

Fig. dis a sect on taken on line 6 6,-

Fig.2. a The improved stacker. forming the sub ect frame having two spaced parallel runners '1, whose rear ends are connected by a transverse frame member 2, and which are fur-- ther connected by means of transversebars '3, 4 and 5. Corner posts 6 are provided at the rear end of the-frame and each. of

said corner posts consists of two spaced parallel members secured to opposite. sides of the corresponding runners. Braces 7 have 'themannershown quite clearly in 'Figs. 2 and Short braces '10. extend from the underside of the corner-post braces to the.

runners and have their lower ends notched into the runners as indicated by reference numeralll. These braces, like braces7, are provided with steel bars 9 by means of which they-are anchored to the runners. Angles 12 are placed in the corners where the braces 1O intersect the braces 7 and are, held. in

place by means of bolts that extend through the braces 7 and through the steel bars 13 located on top of these braces. This constructionprevents braces 7 from splittinginv planes perpendicular to. the surfaces shown I in Figsrl and 2; Secured to oppositesides of braces 7 are washers 14 thatare provided with hubs 15. A bolt 16 extends through each of the braces 7 and through the open-g ings in hubs 16. A washer 17 is located be- I tween the head of bolts 16 and the corre-' sponding outer end of the hub on oneofthe washers. 1 The upper end of'brace 18 is provided with an openingthrough which the bolt 16 passes; in the manner shown in-Fig.

4 and the lower endof thisbrace is secured to the transverse bar 3 by means of a bolt'19. V

The stackerframe arms 20 are provided at their lowerends vwith steel bars 21 which embrace the braces 7 and are provided with openings for thereception of-the hubs15, all

as shown inFig. 4.v The l1l1bS15 becomethe pivots about which the stacker arms rotate and whenthe nuts 22' on bolt 16 are drawn up tight, the braces 7 cannotsplit in planes perpendicular to the axes of.b0lt 16. The construction just' described is a very substantialone i and practically all danger of the braces 7 splitting is obviatedby the clamping action of the bolts connecting the angles 12 to the steel bar 13 and by the action of bolts 16. The notched construction where the ends of braces 7 and 10 connect with the runners 1 combines with the steel bars 9 results in a construction which is exceeding- 1y rigid and which, therefore, does not readily become loose due to theheavy strains to which the parts are subjected. The upper ends of the corner posts 6 are connected by.

means of a bar 23 which extends parallel to s the bar 2 and are further braced'by means of'diagonal braces 24 whose upper ends are connected with the center point of bar 23 and whose lower ends are connected to the runners'by means of bolts 25. Shortdiagonal brace members 26 extend from near the center ofjbar 2 to the outer ends ofbar 3 to which they are connected by means of bolts 27. A pulley 28 is connected with the upper ends of the braces 24 and a cooperating pul- "ley 29 is connected with the transverse bar 2, 4 while still another pulley 30 is connected nected intermediate their ends by means of transverse bars 34 and have secured between their upper ends two straps 35 and a pulley.

'36.. This pulley is provided with a cable guide 37. "Rods'38 have, their upper ends "connected with the straps 35 andhave their lower endsconnected to the-bolts'39 in the manner shown in Fig. 6. The stackerhead lifting arms 20' areconnected by means of transverse bars 40 and 41. The bar 40 is located in between the stackerhead arms 20 and is secured to the latter by means of angle braces '42 in the manner shown in Fig. 1. The

I bar 41 ext'endsunderneath the arms 20 and is secured to the latter by means of bolts 43.

Straps 44are secured to the opposite sides I of'arms 20 and extend upwardly above the tops of'the stackerhead extension arms 45.

i A casting 4 6 is secured between the .upper ends of the straps 44 by means of a bolt 47,

f and "secured tothe underside of this'casting 1s a"bumpersp'r1ng 48 to'which reference will hereafter be made. Braces 49 extend diagonally from the outer ends of straps 44 and are secured to thearms 20 by means of bolts or rivets 50. Diagonal braces 51 extend from nearthe outer ends of the transverse bar 41 to points near the center of the transverse bar '40 andare secured to the latter by 51 are secured to the bar 41 by means of bolts 53, which pass through openings in the flattened perforated heads of bolts 39. Brackets 54 are secured to the ends of-bars 41 by means of bolts 55 and these brackets are perforated so that bolts 39 may pass through them. These bolts also pass through strap 44 and through the arms 20 and are provided with nuts 56 and 57 which can be adjusted longitudinally of the bolt and which therefore serve to twist the arms 20 so as to properly vlocate them in case this becomes necessary.

The clamping action of nuts 56 and 57 also serves to prevent the arms 20 from splitting. The tension in the rods 38 is resisted by the bolts 39 and by the brackets 54 and therefore the splitting action which might result if rods 38 were connected directly with the arms 20 is avoided.

The stackerhead consists of a plurality of bars or fingers 58 whose rear ends are connected by means of a transverse bar 59 and which are further connected by means of a transverse bar 60. Vertical fingers 61 are secured to the fingers 58 by means of bolts 62 and these are braced by means of diagonal braces'63. The stacker head is attached to the front ends of the stacker-extension arms 45 whose front ends are secured to the bar by means of bolts 64. These extension arms are located between the bars 44 and are provided near their other end with U-shaped steel clamps 65 that encircle the arms 20 and which serve as guides for bars 45. Bars 45 are provided with spaced openings 66 that are adapted to receive pins 67 which, ofcourse may be shifted from any set of openings to any other set as may be desired. Each of bars 45 are also provided with a transverse bar 68 for a purpose which will hereinafter appear. A cable 69 has one end anchored at 70 and this cable extends about pulleys 28, 29, 30 and 36 so as to form a block and tackle arrangement for raising the stackerhead from the position shown in Fig. 2 to the position shown in Fig. 3. For the purpose of extending the stackerhead as it is being raised, extension links 71 have been provided. These links are pivoted between the upper ends of each pair of corner posts and swing about the pivot 72 from the position shown in Fig. 2 to that shown in Fig. 3. Since arms 20 pivot about bolts 16 and links 71 pivot about 72 and since pivots 16 and 72 are spaced a considerable distance apart, it is evident that the line joining these pivots form one side of a triangle of which theother sides are formed by the stacker arm extension frame and by links 71. When the parts are in the position shown in Fig. 2, the distance from the pivot 16 to the ends of the corresponding links 71 is a minimum, but'when the parts are in the position shown in Fig. 3, this side of the triangle becomes. the longest. Theends of links 71are provided with steel hooks 73,1which are secured to the links and one of which extends down below the arm and has an ofiset portion "sion frame. It will be observed that hook 7 3 74 that engages underneaththis arm. The

' part 74 serves tohold the links from jumping or from leaving the stackerhe'ad exten which is located'on theoutside of the stackerhead extension frame is the one that carriesthe end 74. and that: the one onthe inside terminates directly beneath the hook portion 75. The one on the inside has therefore been indicated by reference'numeral 7 3 The hooks 7 8 are" so positioned that they will extension arms-upwardly whenthe stack, 'erhead is moved from the position shown in engage the pins 67 and will therefore serve to slide the stackerhead and stackerhead Fig. 2 to that shown in'Fig. 3. The amount of the extension depends onthe position of thepin 67. When this pin is located in the I hole 66 nearest to the transverse bar'67, the

extension of the 'stackerhead is the greatest,

and if-it' islocated in thehole nearest to the stackerhead, there is practically no extension of the stackerhead and this position is therefore used when the stack is first started. As the stack increases in height, pins 67 areperiodically moved closer to the bar 68 soas to extend the lift, of the stacker. When the stackj erhead is returned to r the position shown in Fig. 2, the hook members 7 3-engage the transverse bars 68 so as to .pull 'the'stackerh'ead back tothe position shown in Fig.

7 g It is,of course, necessary to provide means forlimitin'g the throw of the stacker head and for this purpose cushion barsx76 are provided. These bars are formed each of two parallel members and have their lower ends pivoted at 77 to one endof a short link 78 whose other 'end is pivoted at 79 to the lower ends of the corner posts. A spring 80 has one end anchored to the cushion bars at 81 and the other anchored tovthestrap 13 at 82. The corner post braces are each provided with a notch 83with which'the pin 8&- of the corresponding cushion barengages. when the parts are in the position shown in 1 Fig. 2 for the purpose of holding the cushion bars in elevated position. The free end of each cushion bar is 'provided' with a transverse pin 85, which is adapted to engage the hooked end of member 86 that is carried. on

the extension'links 71. The length of the cushion bars is suchthat-when the'pin 85 is in engagement with the hook 86,bar 76, links 71 and posts 6 form a triangle anditherefore "clockwise-direction, puts the cushion bars 0o any forcetending to rotate the links 71 in a under tension, instead-of as would otherwise be the case, under a'flexing strain. The fact that the cushion bars are undertension when they are functioning tostop'the movement of the stacker head, gives a very strong construction and obviates the danger of break- .ing these bars which could easily be done if theywere put under a bending strain. When the'parts approach the position shown in g Fig. 3, the upper ends of the extension links 71 engage the ends of the bumper springs 48,

which yield under the force to which they are subjected and relieves the parts from the severe strains to'which they-would be subjectedfif these springs were not present.

Attention is called at this point to the fact that when the bumper springs come in contact .with the upper ends'of the extension linksthe force exerted by the spring against the link tends to lift the stackerhead and to remove the strains from the pivots about which the stackerhead frame rotates. This is of great importance and is considered a radical departure from the usual practice which, as a rule, employs a tension member anchored at one end to the'runners 3 and at the other to. the stackerhead lifting frame arms 20 as with such a construction there is a resultant contact with: the surface of the ground. The

stacker extension frame pivots are" also located some distance from the rear end of the frame, or from the cornerpost l6 and as a result of thisthe, stacker frame will have force which adds to the weight of the stacker 1 arins'and increases the strain on the pivots. The weight of the cushionbars 76 isaddedv to the effect of the spring .80 andthe-latterarearward inclination when in itselevated position and this makes it possible to deposit the hay more nearly in the center of the stack than if the stacker frame was limited to a vertical position only. i

From Figfllyit will be seen that on account of the construction employed in this stacker, the lifting arms 20 of the stacker extension frame, as well-as the inclined braces 7 lie directlyoverorin the same planev asthe runners v1, thereby obviating any twisting strains such aswouldbe produced if the bars 20 were located on'the outside of the braces 7.

Applicant desires to call particular, attention to the following featuresof the con- ,struction:

- (l) The relationship and relativelengths of the cushion bars 76, the extension links 71 and'the distance between pivots 72 and 7 9, together with the'position of hook 86, as these parts form a stop for the stackerhead lifting frame in whichthecushion bars 76 are put under tension dueto the factthattheparts mentioned interconnect so as to form a triangle'in which 76 is a tension member.

(2) The use of the washers 14 whichare provided with hubs 15 through which the bolt 16 passes. Hubs 15 form the pivots and when bolt 16'is under tension the clamp ing action prevents brace 7 from splitting.

The construction shown in Fig. 6 by means of which it is possible to adjust the axial plane of arm 20 and resist splitting strains from splitting'this arm. This construction also distributes the tension in bar 36 so asto obviate to the greatest extent injurious strains.

(4) The presence of the buffer springs 48 which engage the upperends of the extension links 71 when the stackerhead extension frame approaches its upper limit of movement. The force exerted by the ends of links 71 against the springs 48 tends to lift the stacker head extension frame and decreases the strains on the pivots formed by hubs 15.

a (5) The interconnection-of links 71 with arms 20 by means of the bent ends 7-1 of the hooked members 23 prevent the links from jumping off the arms, prevents accidents and assures positive operation, and

(6) The cushion bars 76 besides serving as a tension member of'the triangle forming the stop also serve as cushioning means tendmg to oppose a gradually lncreasing force to the rearward motion of the stackerhead lifting frame; this is due to the action of the towards vertical position, and means for limiti'ng' the rearward movement of the lifting frame,'said last named means comprising three members adapted to form a rigid structure when moved to a given position, and means carried by one of said members for engaging the stackerhead lifting frame when the latter approaches its limit of travel and form a stop.

2. In a stacker having a supporting frame, a stacker head lifting frame pivotally attached thereto, means for rotating the lifting frame comprising an A-frame pivoted at its base to'the supporting frame and tension barsconnected with the upper end of the A- frameand at their lower ends with the lifting frame, the lifting frame having a transverse bar (41) whose ends are connected with the two arms (20) of theliftin frame by means of bolts (43), a guide bar 44) located on each side of each of the arms, an eye bolt (39) extending through the arm and through the two guide bars, said bolt having nuts (56, 57 foryclam'ping the guide bars'against the sides of the arms, a brace member (51) connected with the transverse bar adjacent the inside of each arm, the eye of eye bolt lying above the brace bar and connected with the brace bar and with the transverse bar by means of a bolt (53), that portion of the eye bolts between the inside of the lifting frame arms and the outside of the brace bars (51) serving as the attaching means for the tension bars (38).

8. A stackerhaving a supporting frame, a stacker head lifting frame having two parallel arms pivoted at one end to the supportingframe. and means for twisting the arms.

4. A stacker having a supporting frame, a stacker head lifting frame having tWo parallel arms pivoted at one end to the supporting frame, a transverse bar extending between the arms and secured to the under side of the latter, and a bolt extending through each arm near the center thereof, said bolts having one end anchored to the transverse bar and provided with'a nut on each side of the arm whereby whenthe nuts are manipulated the arm can be moved along the bolt and twisted.

'5. A stacker having a supporting frame, a lifting frame having one end pivoted to the supporting frame, means for rotating the lifting frame from a substantially horizontal to a substantially vertical position, a link pivoted to the supporting frame at apoint above and to the rear of the lifting frame pivot, means carried by the free end of the link for slidably connecting it with the lifting'frame and a spring carried by the lifting frame and so located that it will engage the end of the link when the frame approaches the limit of its upward movement.

6. In a stacker having a supporting frame having spaced runners and provided-with a corner post at each rear corner, a brace extending diagonally from the top of each corner post to the corresponding runner, a support extending from the lower side of each brace to the corresponding runner, said brace and support having their ends notched into the runner, connecting strap extending from each side of the brace to the runner, connecting straps for connecting the support to the runner, means for connecting the upper end of the support with the brace, a washer secured to each side of the brace, each of said washers having a central hub, a bolt extending through the brace and through the washers and a lifting frame having one end pivoted to the hubs of said washers.

7. In a stacker having a supporting frame having spaced runners and provided with a corner post at each rear corner, a brace extending diagonally from the top of each corner post to the corresponding runner, a support extending from the lower side of each brace to the corresponding runner, said brace and support having their ends notched into the runner, connecting strap extending from each side of the brace to the runner, connecting straps for connecting the support to the runner, means for connecting the upper end of the support with the brace, a washer secured to each side of the brace, each of said washers having a central hub, a bolt extending through the brace and through the Washers, a lifting frame having one end pivoted to the hubs of said Washers and means for 1'0- tating the frame-about its pivots.

In testimony whereof I aifix my signature. 1

' JOSEPH H. COPE.

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