US 2200274 A
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Description (OCR text may contain errors)
May 14, 1940.
H. HAYES PORTABLE CRANE Filed No'v.
nnymmllmyn 26, 1958 5 ShetS-Sheet 1 f/ 2, Il!IllIIUlmIIlIIllllllllll-llllllllllllllmllllll Q i Wok? INI/N70? HAL HAYES A TTO/VEY May 14, 1940- H. HAYES 2,200,274
PORTABLE CRANE File@ NOV. 26, 1938 5 Sl'leetS--SheeiI 2 ATTU/VEY May 14, 1940.
H. HAYES 2,200,274
PORTABLE CRANE Filed Nv. 2s, 193e 5 SheeiZs--Sheetl 3 /A/VfA/TOR H HA V55 Afm/mfr May 14, 1940.
H. HAYES PORTABLE CRANE Filed Nov. 2,6, 1938 5 sheets-sheet 4 ATTORNEY May 14, 1940. H, HAYES 2,200,274i
PORTABLE CRANE Filed No'v. 26, 1938 5 Sheets-Sheet 5 Patented May 14, 194e Pom-ABLE om Hal Hayes, Los Angeles, Calif. Appucauon Notember zc, 193s, serial No. 242,551 (on. 212-49) g fi. Claims. This invention relates 'to aportable crane.
In the building of various structures. par.
ticularly those concerned with the placing of concrete or other cementitious material, it is usually necessary to provide forms which must be set in place and removed therefrom After these forms are positioned it is then necessary to prepare and piace concrete in or around them in order to make a wall structure. A device of this particular .charl0 acter is shown in my co-pending application entitled -Portable crane, filed. in the United States Patent Oillce July 12, 1937, and bearing Serial No.v 153,180.' now Patent No. 2,14,111 granted January 10, 1939. Inthis type'of crane it is desirable llli to provide a structure which is mobile and may be readily set up for` use at a desired point of operation, the structure being easily folded for transportation and unfolded so that it will have lsufficient overhead clearance to elevate and place wall forms of a height as represented by the top of a building to be constructed, and which crane may be then used to mix and place concrete in and around the forms, and thereafter may be used to elevate the forms and leave the concrete walls standing as supported by their own strength.
the crane tower, 4the boom thereon and the concrete mixing and placing apparatus.
The present'invention contemplates the provision of a truck designed to carry an extensible tower and concrete mixing and conveying mech. anism, the upper end of said tower being tted with a boom made in sections and which may be extendedghorizontally to a length giving it a reach suillcientto swing over the entire area of opera-` tion around the truck, the structure being tted with further novel means whereby concrete may be conveyed from a mixing device carried bythe truck to any suitable point along the length of the boom.
'I'he invention is illustrated by way of example in the accompanying drawings, in which:
Figure 1 is `a view in side elevation showing the complete portable crane in its operative position.
Fig. 2 is a view in side elevation similar toFig. 1`
reversal and transportation. Y
Fig. 3 is a view in en'd elevation. showing the structure with side bracing tending to stabilize 55 the crane when the boom hangs in an over-balanced relation to the vehicle which serves as its.
Fig. 4 is a view in plan showing the crane as indicated in Fig. 3.
Fig. 5 is an enlarged fragmentary view showing the driving means for extending or contracting the tower.
Fig. 6 is a. view in diagram indicating the cable arrangementfor the boom.
Fig. 7 is a view in diagram indicating in plan the manner in .which the tower extending and collapsing mechanism is driven.
Fig. 8 is an enlarged fragmentary view in vertishowing the structure collapsed and ready for cal section and elevation showing the driving means for the turntable.
Fig. `9 is an enlarged view showing the bucket guide as seen on the line 9 9 of Fig. 1.
Fig. 10 is an enlarged fragmentary view in side elevation indicating the 'centering means for the bucket.
Fig. 11 is a view in transverse section as seen onthe line I I-I I of Fig. 5 and showing the construction of the posts of the tower.
Fig. 12 is a fragmentary view in plan indicating in diagram the various clutch and transmission units carried.- on the tower. J
Fig. 13 is anenlarged view in transverse secl tion as seen on the line I3-,I3 of Fig. 1 and shows the construction of the traveling carriage and the method of mounting it on the boom.
Referring more particularly to the drawings,
III indicates the chassis of a motor truck having the usual front wheels II and rear wheels I2. At the forward end of the truck is the usual motor unit I3. In this particular construction a, frame I4 is mounted on the chassis at the rear end of the truck and receives a. concrete mixing unit I5. This unit includes a power unit I6 driving a concrete mixer I6 and in connection with which a skip Ill is mounted to feed the ingredients of a cementitious mixture into the drum of the mixer Mounted between the cab I9 of the truck and the concrete mixing unit I5 is a tower 'structure 20. 'I'his includes a unit 2i which is rigidly fas- 4 ends to bearings 28. The bearings 26 and 28 rotatably hold the shafts 21. As shown in Fig. 5 of the drawings, the shafts 21 are threaded throughout their length and each receives a nut 29 which is fixed to a vertical corner post 30 of the upper movable section 22. The upper movable section 22 is of smaller dimensions in a horizontal plane than the lower fixed section 2|, and in view thereof it can move downwardly and telescope within the xed section. The corner posts are secured together by horizontal tie elements 3| and diagonal elements 32. One of the shafts 21 is fitted with a worm Wheel 33 at its lower end and this is in mesh with a worm gear 34 so that it may be driven thereby. 'I'he worm gear 34 is carried upon a drive shaft 35 which leads into a clutch 36 which is controlled by a shifting lever 31 so that the drive of the shaft 35 may be established and driven in advance or reversed direction.
The driving element of the clutch 36 is connected with a drive shaft 38. This shaft is fitted with a universal joint 39. A shaft 40 is also connected with the universal joint and is placed in driving connection with the engine unit |3. In order that all of the shafts 21 may operate in unison each is fitted with a sprocket 4| to receive an endless chain 42 which leads around the outer periphery of all the sprockets. A tension sprocket 43 is provided to deflect the chain 42 at a point between two of the shafts 21 and to thereby maintain the chain in driving engagement with all of the sprockets 4| all the time. By this arrangement the shafts 21 may be simultaneously driven to raise and lower the movable section 22 of the tower.
Mounted upon the upper end of the tower section 22 is a platform 44. This platform has a central opening 45 through it for a purpose to be hereinafter described. The opening is preferably circular. Arranged around the opening and thereabove is an annular track 46 which has a vertically extending cylindrical side wall 41, an overhanging flange 48 and a trackway 49. Resting upon the trackway 49 are wheels 50 of a turntable 5|. These wheels are mounted insbearings 52 which are carried by a frame structure 53 forming a boom mounting for the boom 54. The frame structure 53 includes a plurality of transverse horizontal tie plates 55 with a central opening therethrough and vertical uprights 56 and 51. The upper ends of the frame structure 53 are tied together by horizontal elements 58. Suspended from the frame structure 53 is a platform 59 carrying a ytransmission unit 60, the details of which are indicated in diagram in. Fig. 12. A driven shaft 6| is provided for this unit and is driven from a drive shaft 62 forming a part of a power unit 63. The driving action is accomplished by sprockets 64 and 65 and a driving chain 66. It will be seen that the power unit 63 is mounted on a platform 61 carried by hangers 68. 'This places the transmission 60 and the power unit 63 in an overhanging position as supported by the tower extension 53 and upon the diametrically opposite side thereof from the boom 54. The details of construction of the transmission will be more` fully described hereinafter.
It is intended that the tower extension 53 shall rotate around the longitudinal vertical central axis of the tower 20. This is accomplished by providing a ring gear 69 which is secured to the platform 44 and circumscribes the central opening 45 therethrough. In mesh with this ring gear is a pinion 10 carried by a vertical shaft 1|. The vertical shaft 1| is supported in bearings 12 pinion 10 is driven the tower extension 53 will be caused to rotate around a central vertical axis as determined by the guide track structure -46 and the rollers 50.' An inner overhanging lip 18 prevents the rollers from moving laterally.
Secured with relation to the tower extension 53 is a horizontally disposed boom section 19. This overhangs thetower at the opposite side from that upon which the power unit is mounted and is pivoted thereto .for vertical movement at 19'. The length of this section is a length substantially suillcient to cause the boom to overhang an end of the truck. At the outer end of the boom section 19 is a hinge structure 80. This hinge structure carries a boom section 8| which may swing downwardly and then upwardly to a folded position beneath the boom section 19, as particularly shown in Fig. 2 of the drawings. In order to support the overhanging weight of the boom when itis in its unfolded position a mast 82 is pivotally secured to the tower extension 53 upon pivots 83. This mast is provided with a brace post 84, which is pivoted to the tower extension 53 at 85 and detachably secured to the mast at 86. A guy cable 81 is provided and is led from a winch 88 upwardly over a pulley 89 at the top of the mast 82 and then is led outwardly and downwardly through an eye 90 carried at the outer end of the fixed boom section 19 and into a fastening pin 9| carried by the free section 8| of the boom. This guy wire 81 may be wound or unwound by operation of the transmission 60 and by driving the pulley 88 through its shaft 92.
Mounted at the outer end of the boom section 8| is a shaft 93 carrying a pulley 94. Led around the pulleyf94 is a cable 95. One end of this cable attaches to the bearing 98 of a travelling pulley shaft 91, upon which a travelling pulley 98 is mounted. The other end of the cable 95 is led around a drive shaft 99 and over a pulley |00. This end of the cable 95 is attached to a bearing |0| carrying a shaft |02 of a travelling pulley |03. ported by the bearing structure 96 and carry anged wheels 96' which travel along the lower rails of the boom sections 19 and 8|. Thus, when the cable 95 moves in one direction the traveling structure including the two pulleys 98 and |03 moves outwardly in unison along the boom and when it moves in the opposite direction the two traveling pulleys 98 and |03 move inwardly along the boom. Secured to the bearing |04 which rotatably supports the pulley -shaft 93 at the outer end of the boom se'ction 8| is a cable |05. 'I'his cable is led around the pulley |06 of a traveling block 01. The opposite end of the cable |05 is led around a. winding drum |08 mounted on a shaft |09 and driven through a gear set unit |09' of the transmission 60. As the cable |05 is paid out the traveling block will be lowered irrespec-` These pulleys and shafts are supcome r from its closed position will permit the contents of the bucket to .be discharged.
The bucket m maybe transported mandI from the concretemixing .unit 'to anydesired lpointalongthe length of the boom and to any desired level between the boom and the ground.
When the bucket is moved into a position within the tower extension 5l it may then be lowered down through the center of the tower until it reaches a catcher` III. This catcher is formed with'wedgeshaped fans IIS' which will be engaged by pins |I4 on opposite .sides of the 'bucketand will rotate thebucket to bring the `pins in register with guides ||5.
The pins ||4 are disposed along opposite sides of the bucket and when in register with guide channels I5 will position the bucket for filling. These guide channels extend downwardly and toward 'the rear of the tower sothat the bucket may assume the position shown in Fig. 2 of the drawings and will be so disposed as to receive the mixed concrete from the concrete mixing unit |5, after which the bucket may be elevated and moved laterallyto place the concrete as desired. In view of the long reach provided by the boom it is necessary to brace the tower and to counterbalance the boom, and it is also necessary to stabilize the chassis so that it will not rest yupon the vehicle springs. The structure may be braced lengthwise of the motor truck by diagonal braces ||6 whichare secured by their upper ends to the A fixed tower section 2| at a convenient height. The
lower ends are secured to a frame extension I I1.
which projects horizontally beyond the forward-4 end of the motor truck radiator. A transverse beam ||8 extends horizontally to tie the separate brace Vmembers ||8 and ||1. Carried by these transverse beams 8 is a plurality of jacks IIS.
These jacks include a bodyportion |20, a threaded screw |2| which engages a nut |22 and carries a foot |28 at its lower end. Similar jacks ||8 are carried at the rear of the truck and thus take all of the weight of the structure off vof the springs so that Vthe tower 20 will be held rigidly in its vertical position during operation.
In the event that the boom is required to swing to the side of the longitudinal axis of the truck, which lwould be often the case, stabilizing frames |24 are provided. These include-diagonal frame elements' |25 secured to the fixed tower section 2| nearl the upper vend thereof and extend downwardly and outwardly to be secured to a horizontal beam |26. Suitable diagonal bra'cing |21 is provided to give thestructure rigidity. Disposed the `structure may swing to thecollapsed position indicated indotted lines in Fig. 4 of the drawings.
In operation of the present invention the structure is assembled as particularly shown in Fig. 1 of the drawings, and when ready for transporta-i `tion appears as shown in Fig. 2. `In actual practice the boom'is swung to a trailing position. In this condition the jacks Il! will be elevated and the side brace elements |24 will be swung along-- 'side the tower for transportation. vThe tower is in its collapsed condition with the movableA section 22.and`the;extension 58 lowered'to a point of rest on the supporting frame of the structure. At the same time the bucket will be lowered down through the tower and disposed in the guides III where it will seat against a stop Ill. The boom 54 will be folded around vthe hinge 80 so that the boom section 8| will be swung in and beneath the section 18 and will be held by suitable fastening means |80. At this time the various cables 81, and |05 will be drawn around the folded end of the boom in position for subsequent use. When it is desired to use the structure vit is moved to a selected position, after which the various-jacks ||8 are adjusted to assume positlonsshown` in Fig. 1 andtoholdthe entire structure level onl the ground `upon which the wheels ofthe truck are resting. The brace structure |24 may then be yswung into position and supplied with yballast on the side upon which it is required, or if necessary similar brace. structures may be used on both sides of the tower. The boom may then be rotated through'the power unit 55 and the transmission unit 60 so that the shaft 1| will be driven. This will swing the folded boom 54 from a position of longitudinal alignment. with the truck to a position where the lower section 8| ofthe boom may be swung outwardly and upwardly from the.
position indicated in Fig.-2 of the drawingsr to the position indicated in Fig. 1 of thedrawings. It`will be understood that the action of moving the boom through the drive shaft 1| Will lcause the boom to travel in a horizontal plane around the vertical axis established by the tower.
driving action to thus swing the boom includesv elements within the transmissionunit 60.
to the shaft 15. The shaft 15,\as previously described, carries the worm 15 in mesh with the worm gear 14. It will thus be evident that by manipulation of the reversible clutch 60' the direction of rotatlom of the worm 15 may be produced, and that by settingthe transmission16' in neutral the driving action may be interrupted. The worm 15 and the gear 14 are irreversible in' theiraction so that the turntable will yremain locked as set.
In order to swing the outer boom section 8| upwardly to its desired position or to swing the boom around its pivot 54' the cable 81 may be moved by rotation of -the drum 88. This drum which is ymounted on shaft 82 is driven by.worm gear set 88' from a shaft 82'. Thel shaft/ 92' carries a wheel |40 which may be a sprocket wheel'or a pulley and around which a. flexible driving element |4| is led. The element |4|1 also t is led around a driving wheel |42 which is freely mounted upon the shaft 6|. A clutch element |43'is splined to the shaft so that the sprocket |42 may be keyedl to the shaft for driving action or disconnected therefrom when it is not desired to manipulate the cable 81. In event it is desired to operate the carriage structure carrying the sheaves 88 and A|08 the cable 95 may be operated.' When the outer boom section 8| has been properly positioned inlongitudinal alignment with the section 18 the two elements may be fastened together by suitable fastening means ISI.
When it is desired to raise and lower the bucket the cable |05 may be manipulated. This cable is wound on drum carried upon a shaft |09. A worm structure |00' drives the shaft |09`froxn a reversible clutch unit |44. The clutch unit |44 is driven through gears |09' carried by a drive shaft 02, thus the cable may be unwound or' the structure |01 and the hook ||0 the cable 95 may be shifted. This cable is led over a guide sheave |45 and is connected by its oppositeends to the bearing structures 96 and |0| of the carriage 96" upon which the sheaves 98 and |03 are mounted. 'I'he cable 95 is also led around sheave |00 and looped around an idler sheave |00 so that suilicient friction will be exerted upon the cable to prevent it from slipping' on the sheaves as they are driven'. The sheave `|00 as mounted upon the shaft 99 is driven through a worm gear set 99'. A shaft |46 drives the worm gear from areversible clutch |41. This clutch is provided with a shaft |48 carrying a. drive wheel or sprocket |49v around which a belt or chain |50 is led. This element is led around a wheel or sprocket |5| upon the shaft 62, thus when the reversible clutch |41 stands in a neutral position the shaft |46 will not be driven, but when in either of its active positions will drive the cable 95 to 4shift the carriage 96" and the sheaves 98 and |03 thereon. This will cause the supporting hook ||0 and the lbucket to move longitudinally of the boom to a supported position along the length of the boom or to a position within the tower so that the bucket may be lowered through the opening 5|' in the plate 52 and then through the center opening occurring in ring gear 69. When the bucket is so lowered the pins ||4 thereon will strike the inclined faces H3' of the guide structure ||3 and direct the pins ||4 into the channels H5, as shown in Fig. 9 of the drawings. This will insure that as the bucket is lowered to a position where it may be filled from the cement mixing unit l5 that the bucket will stand in a proper position irrespective of that in which it may have been hanging on the cable |05. Thus, it will be seen that as the structure is manipulated the material from the mixing unit I5 may be directly placed within the bucket vand elevated directly up through the center of the towerand then horizontally and outwardly along the boom without requiring any intermediate transfer of material in moving it from its vertical path of travel to its horizontal one. 4
When'it`is desired to discontinue Ause of the structure and move the entire device to another point of operation the bucket and the hook H0 will be drawn upwardly and into the top of the towerfafter which the fastening |3| may be disconnected to permit the outer boom sectionl to swing on the hinge'80 so that its outer end would swing downwardly and could be then swung around to a position beneath and parallel to the boom section 19, as shown in Fig. 2 of the drawings. 'I'he turntable may then be rotated to place the folded boom in a trailing position on the vehicle, after which the tower may' be lowered by establishing driving connection through the transmission 36 to the worm gears 34 and 4| so that the driving action will be simultaneously imparted to the endless chain 42 which is led around the various shafts 21 and the sprockets thereon. By this arrangement the shafts 21 will be rotated to yadvance the nuts salons the screw sections of the shafts so that the upper tower section 22 may be lowered into the lower tower section and assume the collapsed position indicated in Fig. 2 of the drawings. When the lowering operation has been completed the driv-- ing operation through the transmission 30'may be interrupted. The side braces |24 may then be swung alongside the vehicle to the collapsed poa sitions shown in Fig. 4 of the drawings and indicated by dotted lines. v
It will be obvious from anv examination of the drawings and an understanding of the operation that by the means here shown a portable crane is provided which may be transported lreadily from place to place and which may be used to,
support and move heavyloads, and to` quickly "transport concrete and other building materials `.from a point adjacent to the ground to a point at any level reached by the tower and the boom. While I have shown the preferred form of my invention as now known to me, it will be understood that various changes may be made in combination, construction and arrangement of parts by those skilled in the art, without depart ing from the spirit of my invention as claimed.
Having thus described my invention, what I claim and desire to lsecure by Letters Patent is:
1. A device of the character described comprising a motor vehicle, a telescoping tower' mounted thereon, means optionally driven by the power plant of the vehicle for extending and contracting said tower, a boom formed of a plurality of folding sections, one of which is supported by the tower whereby the boomwill overhang the tower, conveying means on the boom, power means for the conveyor, said power means being mounted on the tower in a manner to counterbalance the boom, a turntable structure driven by said power means whereby the boom may be swung in a horizontal plane, and means associated with the power means for raising and lowering the boom.
2. A device of the character described comprising a motor vehicle, a telescoping tower mounted thereon, means optionally driven by the power plant of the vehicle for extending and contracting said tower, a boom formed of a plurality of folding sections, one of which vis supported by the tower whereby the boomwill overhang the tower, conveying means on the boom, power means for the conveyor, said power means being mounted on the tower in a manner to counter- ,of the motor vehicle for optionally raising and lowering said tower, a turntable structure at the upper end of the tower adapted torotate around a vertical axis, a boom carried at the top of the turntable structure and supporting the same above and in vertical spaced relation from the turntable structure, said turntable structure having a central opening therethrough, power means for rotating the turntable structure and swinging the boom horizontally, abucket support on the boom, a bucket carried thereby, and means for manipulating the bucket support whereby the bucket may be moved horizontally and vertically to a desired position with relation to the boom or lowered through the opening in the turntable structure and into the tower.
4. A device of the character described including an extensible tower, power means for driving the same, a turntable structure at the upper end of the tower adapted to rotate around a vertical axis, a boom carried at the top of the turntable in vertical spaced relation from the turntable structure, said turntable structure having a central opening therethrough, power means for rotating the turntable structure and swinging the boom horizontally, a bucket support on the boom, a'bucket carried thereby, and means for manipulating the bucket support whereby the bucket may be moved horizontally and vertically to a desired position with relation to the boom or lowered through the opening in the turntable structure and into the tower.