US2860002A

US2860002A - Hoisting apparatus

Info

Publication number: US2860002A
Application number: US575843A
Authority: US
Inventors: Herbst Walter Joseph
Original assignee: Individual
Current assignee: Individual
Priority date: 1956-04-03
Filing date: 1956-04-03
Publication date: 1958-11-11
Anticipated expiration: 1975-11-11

Description

Nov. 11, 1958 w. J. HERBST HoIsTING APPARATUS Filed Apri; s, 195e Unite This invention relates to an improved hoisting apparatus and, more particularly, pertains to a hoisting apparatus which is particularly adapted for use with die sets.

The prior art discloses a wide variety of hoisting means which are employed with die sets or similar plate members of substantially uniform construction and large bulk. However, these prior art devices are themselves of large bulk and cumbersome in operation. In addition, when utilized with a die set member, movement of the die set other than in a single vertical plane is usually impossible when the hoisted member is in an elevated position. Consequently, when the die set member is elevated, it remains in a single plane and is unable to be turned or otherwise moved for purposes of aixing a die member thereto or removing a die member therefrom, or otherwise engaging the dies affixed to the die set surface. Y

It is an object, therefore, of this invention to provide a hoisting apparatus, adapted for use with die set members or equivalent plate members, which enables thedie set to be pivotally moved in the elevated position in a full circle of 360 whereby both surfaces thereof are readily accessible.

It is a further object of this invention to provide a hoisting apparatus which is composed of a few components, all of which are simple and inexpensive in design.

It is another object of this invention to provide a hoisting apparatus which assures safety in the course of operation.

It is still another object of this invention to provide a hoisting apparatus which is adapted to be used eiciently with any of a large number of die set members or similar members which vary greatly in size.

It is yet another object of this invention to provide a hoisting apparatus in which the supporting cables, comprising a part thereof, adjust their respective lengths to accommodate the size of the specic die set member engaged.

The above and other objects will become more apparent upon proceeding with the following description, accompanying drawing and appended claim.

ln one embodiment of this invention, a crossbar member, which is composed of a durable material such as steel and which is resistant to flexing or other distortion, is supported by means of cables or other equivalent means. The crossbar is movable so as to be positioned above a die set member which is to be elevated and is disposed transversely to the longitudinal axis thereof. Disposed on the periphery of the crossbar member are two adjustable ring members which are securable to the periphery of the crossbar member by means of set screws which threadedly engage each of the ring members. Afiixed to opposed end limits of the crossbar by suitable means are two flexible cable members of sufficient strength to support any die set member to be engaged in the normal course of operation.

States Patent "ice The flexible cable members depend from the crossbat member after rst passing through the adjustable ringA member disposed closer thereto. lt is thus apparent that the flexible cable members have a portion thereof disposed parallel to the length of the crossbar member,V

which portion defines the distance each of the adjustable ring members is disposed from the nearer end vof the crossbar member. Each of the flexible cable members, after passing through its respective adjustable ring members, depends downwardly, normally to` the crossbar member, and has a plate member of steel, or other material of equivalent strength, attached thereto. Each of the plates has a keyhole slot disposed in the central portion thereof. It is the purpose of these slotted plate members to engage in interlocking relationship, projecting stud members having a central reduced neck portion. These studs are affixed to opposed die set edge portions and disposed on an axis passing through the center l of gravity of an underlying die set member which is to be elevated. j

ln the normal course of the lifting operation, the crossbar .member is lowered until it is disposed adjacent the upper surface of the die set member to belifted.l The adjustable ring members are then fixedly positionedon the crossbar member by means of their respective set screws so as to have an interval therebetween substantially equal to the width of the die set member to be elevated. The interval between each end limit of the crossbar and its adjacent adjustable ring should alsov oe equal. Consequently, the lengths of the dependingy flexible cables must, of necessity, be equal. The plate members, having the keyhole slots disposed therein with.

the narrow portion of the slot disposed at the lowermost portion of the slot, then engage the opposed stud members afxed to the die set member. This engagement is effected by means of the reduced neck portion ,of each stud member interlocking with the keyhole slot disposed in each of the depending plate members. Since the opposed stud members are disposed in an aligned relation with respect to the center of gravity of the diey set member, the latter, upon being elevated, may be turned with ease and access readily had to the undersurface or any other surface portion thereof.

For a more complete understanding of this invention,y reference should now be had to the drawings, wherein:

Figure 1 is a perspective view illustrating the hoisting apparatus of this invention engaged to a die set member, and

Fig. 2 is a fragmentary perspective view of the die set disposed over a die setmember prior to engagement therewith.

Referring now to the drawings and more particularly to Fig. l, a hoisting apparatus 10 is illustrated disposed above two cooperating die set members 12 and 14 which are adapted to have die members, not shown, aflixed to their

opposed surfaces

16 and 18, respectively. Such opposed die members kare adapted to mutually cooperate during the reciprocal movement of one or both die set members on guide posts 46, as illustrated in Fig. 2.

The hoisting apparatus l0 comprises a crossbar member 20 which may be supported by the two cable members Y22 of equal length. The two cable members may be securedv to the opposed end limits of the crossbar by welding or other suitable means and are secured at their remaining end limits to a supporting ring member 24 which may, in turn, be supported by a main cable member 26. Dis` posed on the periphery of the crossbar 20 are two adjustable ring members 28, each of vwhich is tapped, enabling set screws 30 to threadedly engage the. tapped apertures and xedly secure each of the adjustable ring members 28 yto the periphery of the crossbar 20.

Two cable members 32 depend from the crossbar 20 and comprise two support means which are adapted to engage either of the underlying die set members 12 or 1A, eed elevate., thev It Wil-1 be nete@ that the elipaerfieg, eellee ereefixed et. their` upper eedl limite, als" illustrated, by means ofwelding, o r other means of sei 'rement'fatSA tothe opposed end limits1 of the sbar 20. will als'owbe noted that each of the flexible cr eable'fmembers' 32, beforey depending toy engageV theudie set'menibers', pass through the adjustable ring member which is fdisposed adjacent thereto. i

"'t'x'ed to ythev'lower end limit,` of each cable member 3'2fis', irithis instance, a'l

p'late'memberl 36." Thefpoint off connection between a cable' 32vand a plate 36 is Such asy to enable-the plates 'to' hang'with their opposed sur? ffces disposed substantially parallelto the adjacent sides offthedie'se't members. Disposed in each of these plate members isa keyhole slot 3S which, as seen more clearly n'Fig". 2,h'asV a narrow 'bottom portion'38a and an enlarged upper'portion 38b communicating therewith. Fixedlyfsecurei in this instance, to opposed longitudnalfedges orV vsidesmof each die set member 12 or 14 are laterally projecting stud members 40, each of which has a reduced central neck portion 42, more 'clearly' seen in Fig.' 2..l The stud members 40 are disposed along alitrans'vers'e, Vaxis'passing through the center'of gravity of "af die 'set memberV 12 or`14, for purposes which will hereinafter be made' apparent.

""r theI normal course of operation, the interval between adjustablerings 28 must iirst be set on the crossbar and shouldbe substantially equal to the width 'of the die slet to" be raised in the manner illustrated in Fig. 2, whereby the cable portions 32, depending from said rings 2 8, are substantially parallel. Itis also apparent that, for purposes of balance, the intervals between each adjustable ring 28 andthe end limit of the crossbar disposed closer thereto should be substantially equal. Notches orY other markings 21 may be disposed along the length'of the bar 20 to facilitateproper positioning of the, rings 28. 1

""I n"attaching the plates 36 to the stud members 40, the'crossbar member 20 is initially lowered a suicient distance to enable the 'stud members 40 to pass through theeorresponding slot portions 38b so asl to permit the reduced neck portion 42 of each projecting stud membe'rf40 to be seated in slot portions 38a. After such engagement, the stud members are securely locked inV th'efplates, 'and relative Vlateral movement between the die] s et member, engaged, and the plate members is bviat'ed. After the plate members '36 have'engaged the studfm'embers' 40 and interlocked therewith, the hoisting apparatus iselevated by an appropriate motive means, ofshown, along with the die set member engaged. It will be` apparent from Fig. 1 that, since the stud members 4Q are disposed along an aXis passing through the center Qf'gravity of an engageddie set member, the latter may longer must be the depending length of each cable 32. AsV the width of the die set member decreases, the interval' between the adjustable rifjgs 28 will correspondingly decrease, and the length of the depending cables 32 will be decreased. Consequently, because of the arrangement whereby the supporting cables 32 pass through the adjustable rings 28, the hoisting device 10 will compensate for the size of the die set engaged.

The release of a die set member, engaged, is quite simple. After the appropriate work has been done on the elevated ldie`set memben'it is'fflowered to engage appropriate guide posts 46 or other, cooperating equivalent parts and lowered asucient amount toen'able the plate members 36 to become disengaged from the projecting studs 40. This latter disengagement is relatively simple and is effected merely by pushing the plate member 36 in a downward direction enabling the projecting stud topass through the enlarged portions of the keyhole slots. 38.

While the studs 40.,are illustrated as beingrdisposed" on the opposite elongated edges of one of the die sets, they may, if desired, be, disposed. at the center of gravity of the opposed end faces of the die set. Likewise, while plates 36 are shown provided with keyhole-type slots 38, it, is within the scope of thisinvention for the plates to be provided with transversely extending pins which might removablyengage selective bores formed along the edges of the die set.V be unbalanced. by reason ofthe arrangement of the dieA members, not shown, on the face thereof, a guide cable, not shown, may be aiixed` to,A the light side of the die setl so that thek operator might readily counterbalance` the weighty, side of the die setl by pulling downwardly on the cable so astoy maintain the die set ina substantially horizontal plane.

While the apparatusl has,l heretofore, beenA described in relation'to a hoisting operation, itis tobe understood, of.

` course, that it has application 1'I1v handling a hfaVYWOr-k piecein, forexample, a` horizontal plane Where sliding,

s uch workpiece from one place to a second place in the same plane is desired. Likewise, the apparatus is readily,

adapted for the, `location 0f,- one die s et with respect` to another, when the latter is not disposed in horizontal plane.

It is thus apparent that a hoisting apparatus particularly.

adapted for usevyithv die set members has been provided whichis ei-licient inl operation, simple indetails. of conf struction and which, in the normal course of use, because.

` ofthe novel methodofengagingthe dieset member, may

be p ivoted about such axis with ease when the die set is Vin an elevated position so that access may be readily had to the undersurface of either die set member. It

will lalso be apparent from Fig. l that, since the hoisting apparatus and the engaged die set member are suspended by a" single cable lmember 26, the entire apparatus may be rotated in a horizontal plane to facilitate access to variousl surface portions of the die set. The upper end limit of the cable 26 may be connected to a common universal type'joint, well known in the art, which allows the cable to rotatewithout twisting thereof. Also, the cable 'may obviously be aixed to an overhead motive means, not shown, which in addition to reciprocally moving cable 26 and parts attached thereto, may transport the same along a monorail or the like. i

The length of the cable members 32 should be such as to enablethe die setmember, engaged, to rotate a full` 180..J without engaging vthe crossbar`20. It will be noted that the wider'the. die setV memberfengaged the be. freely, moved in` theY elevatedA position. whereby access to4 the desired surfaces thereof is readily had.

It is obviousA thatwmany substitutions. and modilications.

ofjtheillustrated device may be, effected which will still remain withintheinventive concepts'herein disclosed. It is intended, therefore, that. this invention be limited only by the scope ofthe 'appendedclairn I claim:

In a hoisting apparatusv for die sets or the like, a horizontally dis'posed,"elongated, rigid supporting member, two flexible oablemembers vaiiXed tovopposed end limits of said supporting member, a pair of cable-engaging means operatively connectedto saidcable members and mounted on, said supporting, member 'for independent, longitudinal `movcmentfwith vrespect thereto to predetermined positionsof adjustment on saidsupporting member, the lengths ofthe portions of saidcable members` depending fromsaidrsupporting member being dependent upon the predetermined positions ofv adjustment of said cable-.engaging means on Saidsupporting member, and locking means cooperatingwith each of saidcable-engaging means and said supporting member to. retain said -ca'bleengaging means in selected positions of adjustment.

(ReferencesL on following page) e Furthermore, if thehoisted die set should.

References Cited in the file of this patent UNITED STATES PATENTS Huner May 24, 1881 Ruppert May 23, 1905 5 Parker Aug. 22, 1922 Ober Nov. 25, 1930 Webster Feb. 11, 1936 6 Mussey Ian. 2, 1940 Myers Apr. 9, 1940 Korner Mar. 23, 1943 Ashenden Dec. 31, 1946 Stewart et a1. Dec. 23, 1952 Anderson Oct. 25, 1955