DE2256309A1 - CLAMPING UNIT FOR MULTIPLE DRUMS - Google Patents

Description

23 005/6 Marvel Industries Incorporated, Evanston, 111. / IJSA

Clamping unit for several drums

The invention relates to a clamping unit for several Drums on a jib stick or the like for clamping and lifting one or more of a series of drums with an arm star, which can be raised and lowered to and from a drum to be lifted, and one hanging down from the arm star Device for aligning the arm star when lowering in relation to a drum.

A device for handling several drums, which is based on principles similar to the device according to the invention

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is shown in commonly assigned U.S. Patent 3,338,616. This drum handling device is generally sufficiently suitable for picking up and lifting a bundle of Drums, however, is not suitable to accommodate a single drum or even only two or three drums, because then the jammed drums that are lifted above the ground tip to an undesirable degree and often fall over on their sides, if they are not held upright by hand when they are set down on the ground. This device for handling drums is therefore not suitable for lifting, transporting and setting down drums in an upright position for storage or for further use Use, and it cannot be used for stacking drums on top of each other. Do not run an entire bundle of four drums is lifted and stacked at the same time.

It is therefore an object of the invention to provide that shown in US Pat. No. 3,338,616 To improve the device in such a way that the clamping unit is arranged and constructed so that it has one, two, three or four Can accommodate drums at the same time and keep the drums in a vertical position, the drums without tipping on the ground or can set down a stack without the assistance of an operator, as is necessary with known devices for handling drums, prevent the drums from tipping over.

This goal is achieved with a clamping unit of the type described at the outset Type achieved according to the invention in that the arm star has a central depending guide part with outwardly directed right-angled wall parts at each corner of the guide part and having parallel walls on opposite sides of the guiding part, the guide part has a greater length than the distance from the top of the drum to be picked up to its center of gravity has, between the parallel walls of the right-angled Wall parts supported by the arm star housing for clamping jaws are provided, in each of which an upper and a lower clamping jaw is pivotably mounted and protrudes from the housing for engagement with a bead of the drum, a control lever in the Housing pivotably mounted 1st and a control connection with the

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Clamping jaws for advancing and retracting the clamping jaws having relative to the housing, a lever arm is provided for each housing, which in an upward direction relative to the arm star springs and each housing with the clamping jaws movably carries on the arm star, an actuating frame movable on the Arm star is attached and a control connection through the control lever having with the clamping jaws and the clamping jaws upon engagement of the actuating frame with the upper end of a drum in a position for gripping the bead of a drum advances, and from the arm star between the right-angled wall parts stop and guide devices for lateral movement relative to the wall parts, the stop and guide means extending generally radially and along the right-angled wall parts under their bottom parts and with larger dimensions than the distance from the top part of a drum the center of gravity of which when the actuating frame engages with the upper part of the drum has wings that extend, the wings along its entire height buffer parts for engagement with the drum, spaced points on the circumference with evenly spaced Have a distance from opposite sides of the clamping jaws, whereby the arm star can be centered relative to the drum and the drum with a lifting movement of the arm star and the clamping jaws can be held up in an upright position.

There is a particular advantage of the device according to the invention in that they grasp and lift one, two, three or four drums of a series of drums and the drums on the ground or a stack in an upright position without manual assistance to prevent the drums from tipping over when they are set down able to sell.

Another advantage of the invention is that a clamping unit is created for several drums, which the drums below and on the bead of a drum or the beads of a One of the drums picks up, and the drums as they are lifted and keep lowering in a generally upright position.

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Another advantage of the invention consists in the simplified arrangement of the clamping unit, whereby a clamping below and on a bead of a single drum or a series of drums and it becomes possible to maintain the drum or drums in a generally vertical position during their lifting and lowering movement.

An embodiment of the invention is shown in the drawing and is described in more detail below. From the following Description, in particular, further sub-goals, features and advantages of the invention emerge. Show in the drawing

Fig. 1 is a perspective bar position of the invention Device during the lowering of the device by the forks of a forklift to a couple on the ground to record standing drums indicated by dashed lines,

Pig. 2 is a partial sectional view through the clamping unit for the Drums that hold the jaws / as well as the supporting and operating devices for this shows

Pig. Figure 3 is a cross-sectional view showing a pawl device and shows locking wheel for holding the operating frame for the clamping jaws, and

Fig. 4 is a partial sectional view showing the bracket of the arm star on the housing attachment of the forklift and generally the Centering device for this shows.

In Figure 1 of the drawings is a generally horizontal, downward one open housing 10 shown, which opposite fork openings 11 extending along BBiner sides for receiving of forks 12 of a forklift 13. You forks 12 and the forklift 13 are only partially shown here and in dashed lines Lines are shown as the forks and forklift can be of any conventional construction and not part of the invention represent. The housing 10 forms a suspension device for

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a clamping unit 15 in the form of a multiple clamping unit for gripping a plurality of drums, which hangs down from the housing so as to be movable sideways to the latter, around a self-centering clamping unit in relation to a bunch of drums and a yielding resilient centering with respect to the housing when the drums are placed on the ground and released · Es However, it should be understood that the housing 10 is not necessarily used I must be used if the clamping unit is used, for example, as an accessory for an I crane.

I The clamping unit 15 contains an arm star 16 with the same all-

I mean cross-like shape like the arm star of the aforementioned US-PS

! 3 338 616. The arm star 16 has a square central part in the

■ general shape of an open pike and points parallel with

] Distance to each other arranged side rails 17, which radially

I protrude from the center of the middle section at intervals of

j are arranged 90 ° to each other and at their inner ends pivoting

I form bearing mountings for lever arms 19. The lever arms are

I generally U-shaped and open and pointing downwards

\. Housing 20 for corresponding upper and lower jaws 21 and

ι 22, which are arranged between them and down from them-

{ hang, as will be described in more detail below. The law-

\ angular central open part of the arm star 16 is formed by

I interconnected, parallel spaced apart

I and over a considerable distance downwardly protruding guide

'plates 23, which the housing 20 for the jaws in the room

take up between them. The guide plates 23 protrude from each

\ Corner of the rectangular open part of the arm star to the outside,

\ and their inner sides run along opposite sides

! the housing 20. The jaws opposite sides 24 of the

\ Guide plates are at right angles to the neighboring one

■ Guide plate arranged at the corner of the frame and form right- ■? angled elongated recesses for stop and guide parts

J 25 of such a length that it extends below the center of gravity of the to be recorded drum protrude, while a plate 26 on the upper ' side of the drum rests and the lower and upper clamping jaws / 21 and 22 3ich are in a position where they are under and on one

Ή) 98? 1 / η3? 8

INSPECTED

225R309

Bead of the drum can come into engagement · The rectangular open central part of the arm star 16 is closed at the upper end by an end cap 27, which from the arm star inside a central open part 29 of a top plate 30 of the housing 10 protrudes upward. A holding plate 31 extends extends beyond the upper end of the plate 30 of the housing 10 beyond its open part 29 and is attached to the end cap 27 e.g. attached by machine screws 32 which protrude through the retainer plate 31 and screw into the end cap 27 as it is is shown in FIG. The holding plate 31 thus holds the arm star 60 hanging down from the upper plate 30 of the housing 10 allows limited lateral movement of the arm star relative to the top plate to center the arm star with respect to one another to allow a bunch of drums without the forklift truck 13 must be actuated to center the unit.

The arm star 16 is resiliently centered with respect to the top plate 30 by tension springs 33 "As in Pig. 4 shown are the Tension springs 33 hung at their lower ends in hooks 35, which from an upper terminal 36 of a series of vertically spaced mutually arranged connections protrude outwards. The connections are on the right-angled parts or sides 24 of adjacent ones Guide plates 23 welded or otherwise attached and form fastening parts for pivot pins 37 for the Stop and guide parts 25

The centering tension springs 33 extend from the hooks 35 through the plate 26 at an angle upwards and are on their upper ends hooked into diagonally extending pegs 39 extending from the bottom of the plate 30 to the sides and end walls of the housing 10 to center the arm star 16 with respect to the housing.

A plate 26 is provided on each side of each housing for the jaws and begins at the top of the rectangular one Part or the side 24. These plates can take the form of ring segments have which by rods 40 on the side rails

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ORIGINAL INSPECTED - 7 -

from these "hanging down" are attached.

An operating frame 41 is fitted into the side rails 17 of the star arm 16 and has a general cross-like shape like the star arm 16 and a rectangular central open portion 45 which fits into the open portion of the star arm. The actuator frame 41 is performed under the control of a holding pawl 53 and a Iiöseklinke 57 vertically movable with respect to the Armstern · the actuating frame has pairs of parallel arms 43 at y which in the guide rails 17 are disposed and the rectangular central open portion 45 to the outside protrude. A vertical guide sleeve 46 extends along the center of the rectangular central open part 45. The guide sleeve 46 may be attached at its upper end to a plate 47 extending transversely across the upper end of the central open part. The guide sleeve extends from this plate downwards through a locking plate 48 attached at a vertical distance and, as shown in FIGS. 2 and 3, beyond this locking plate. The guide sleeve 46 is movably guided along a vertical rod fastened with its upper end to the end cap 27. The lower end of the rod 49 is fastened to a transverse frame part 50 which runs transversely to the rectangular hollow inner part of the arm star 16 and is fastened to the guide plates 23. The guide sleeve 46, which is movably guided along the rod 49, thus keeps the actuating frame centered with respect to the star arm 16 and prevents the operating frame from tilting or tilting relative to the star arm.

The parallel arms 43 of the arm star 16 have downwardly directed Stop surfaces 51 which run along their outer end parts and from the annular sector-shaped plates 26 when the clamping unit is suspended over a drum and is arranged so that it comes into engagement with the top of a drum, which are received during the lowering movement of the clamping unit target. As a result, the bolt or arm 43 is guided into a released position and the actuating frame 41 is moved towards the end cap 27,

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in order to bring the housing 20 and the clamping jaws 21 and 22 into a position for engagement under and on the bead of a barrel or drum _f to grasp the bead by clamping and to lift the barrel when the arm star 16 is lifted, as will be described in more detail below will.

The operating frame 41 is opened by engagement of the retaining pawl 53 held with the locking plate 4Θ in the position shown in FIGS. The holding pawl 53 is at its upper end pivotally attached to a block 55 suitably attached to the end cap 27 and depending therefrom. A Pivot pin 56 forms a pivot attachment for the retaining pawl The pivot pin 56 also provides a pivot mount for the release pawl 57. The Iiöseklinke 57 serves to a To move the locking wheel 59 further in the clockwise direction when the actuating frame 41 is moved to the block 55. The ratchet wheel 59 is suitably attached to a sleeve 60, which in turn rotates on one held at its ends by the operating frame 41 and extends over the right-angled hollow central Part of the actuating frame 41 extending axis 61 is attached. The sleeve 60 also carries a release cam 62 which, when the actuating frame 41 is moved towards the block

55 is rotated by the locking wheel 59.

As shown, the release cam 62 is generally star-shaped Structure and is adapted in the position shown in Fig. 3 of the holding pawl to under the bias of a not shown Spring to give a locking engagement with the locking plate 48. The spring stands with the upper end part of the retaining pawl in remote relationship with respect to the trunnion

56 in connection. A similar spring 63 biases a tooth 64 of the release pawl 57 into engagement with the ratchet wheel 59.

A spring-loaded pawl 65 is provided to to hold the release cam 62 in a position that the holding pawl 53 is in engagement with the locking plate 48 or the bellows pawl 53 is held free from the locking plate 48. This is achieved by engaging a tooth of the release cam 62 with the retaining pawl

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in a manner similar to that described in U.S. Patent 3,338,616 and not shown or explained further here.

The housing 20 for the jaws is in Pig. 2 'shown upright position resiliently pretensioned by a tensile spring 67, which between the lower outer end part of the housing for the jaws and a top plate 68 of the operating lever is appropriate. The lever arm 19 is further dur.cJi a torsion spring 70 which has a pivot pin 71 for the lever arm surrounds and on one side with a pin 72 projecting inward from a side rail 17 and on the opposite side engages a pin 73 projecting inwardly from the lever arm, biased to an upright position.

The housing 20 for clamping jaws is pivotably mounted on the lever arm 19 by a pivot pin 75 between the ends of the lever arm 19. A control lever 76 is further pivotally supported on pivot pin 75 in housing 20, extending at an angle inside and down along the housing for the jaws and has a downwardly open slot 77 at its lower end, in which a pin 79 on a control joint. 80 intervenes in a sliding manner. The control link 80, in turn, is pivoted through a pivot 81 with an upper clamping jaw 22 outside the pivot axis thereof can be pivoted. The swivel connection for the top Clamping jaws 22 is in the form of a pivot pin 83 disposed on the inside opposite the pivot pin 81, which extends transversely to the Housing extends. Adjacent in the lower end of the housing 20 for the jaws, a pivot pin 85 extends transversely thereto Housing and protrudes into an arcuate slot formed in the jaw 21 adjacent the lower end portion thereof, to a To form a pivot connection for this lower clamping jaw, which during a gripping process has a sliding movement along the Pivot pin 85 allows. A tension spring 86 is between one of the jaws 21 adjacent the pivot point under one V / inkel upwardly and inwardly protruding eyelet 87 and a pin 88 attached to the control joint and clamps the jaws 21 in the Pig. 2 outwardly protruding position shown.

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The control lever 76 has an upwardly open slot 89 adjacent its lower cable at the upper end, which with a Pin 90 at the end of a lever 91 can be aligned. The lever is mounted pivotably about the axis of a pivot pin 92 and by a torsion spring 93 at an angle downwards and outwards biased. The pin 90 protrudes over opposite sides of the housing 20 for the jaws by arcuate, itself slots 95 extending generally in an upward direction in the housing and is engaged by torsion spring 93 biased with control surfaces 96 which extend along the upper surfaces of the parallel arms 43 of the operating frame 41 extend.

When the clamping unit with the clamping jaws 21 and 22 in a position as shown in Fig. 1 down into engagement with a Drum is moved, the clamping jaw 21 will only come into engagement with the bead or the ridge of the drum to be picked up and then move to a position in engagement with the bead of the drum. The stop surface 51 of the operating frame 41 is also come into engagement with the top of the drum and move the actuating frame 41 upwards to release the retaining pawl 5j5 of the locking plate 48 to solve. At this time, tooth 64 becomes the Release pawl 57 move the ratchet wheel 59 forward by one tooth and one tooth of the cam wheel or release cam 62 in a position to the shark » th of the retaining pawl 53 in a released position with respect to the locking plate 48 to move. During this movement the peg becomes 90 can be guided by the control surface 96 in such a direction that the upper jaw 22 is engaged in one position comes with the bead of the drum and the lower jaw 21 grips the bead or ridge of the drum and that the jaws gripping the bead or ridge of the drum and lifting the drum when lifting the entire unit. When the clamping unit is moved upward, a bead 21a at the lower front end of the jaw 21 becomes the leading end of the jaw Keep away from the splash of a fiber drum to prevent damaging the flange and use the jaws when the jaw is moved up to a position in

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Engage the bead or ridge of the drum.

With the exception of ugly details, -what the effectiveness of gripping and the reversal of the gripping action of the jaws To improve the achievement of greater gripping forces, the clamping unit works so far in the same fundamental way as in the TJS-PS 3 338 616 shown unit .. The structure described above However, it contains many intricacies in the gripping device, which increase the holding force of the unit and which together with the straightening stop and guide parts 25 work to a? To be able to lift two, three or four drums and then put them down without tilting or on theirs Stack the end faces.

The stop and guide parts 25 each have a wing 97 with a pair of vertically spaced and aligned sleeves 99, which extend along their inner sides between upper and lower sets of connectors 36 and 38 and the pivot pins 3? aufa © iisien * Bi <g pivot pin

37 each have a head at their upper end and are pierced at their lower end below the connector 38 to a cotter pin or the like to hold the pivot pin in place.

Each wing 97 further has base parts 100, which from opposite Sides of the wing between terminals 36 and

38 protrude inwards at right angles to each other. The base parts 100 form sockets for compression springs 101, which engage with the outwardly directed right-angled surfaces or sides 24 of the guide plates 23 and the corresponding wing 97 center with respect to this surface or sides, but a resilient pivoting movement of the wings about the axis of the pivot pin 37 allow when the clamping unit is inserted between a series of drums or lowered along the outside of a single drum. Each wing 97 has a buffer part 103, which runs downwards along its outside and inwards at an angle along its bottom part and under the bottom part of the

309821 / Q328 ORIGINAL INSPECTED

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Wing 97 and the guide part of the arm star 16 ends. That Buffer portion 103 may be in the form of a tube or a tube with a tertiary slot in which the wing 97 fits. The buffer part can be welded or otherwise attached to the wing. The four buffer parts 103, which running under the wings 97 and sides 24 towards each other thus center the unit with a single drum or drum Plenty of drums as they move along them.

When lifting one, two or three drums and in particular a single drum as shown in Fig. 1 becomes the clamping unit lowered, while the stop and buffer guides run at a distance along the circumference of the drum and the arm star like the clamping jaws be centered with respect to the drum in order to come into engagement with the bead of the drum during lowering and to release the actuating frame from the arm star. The up below the center of gravity The stop and buffer guides protruding downward from the drum are thus engaged with the drum by the compression springs 101 pretensioned, and the lifting force of the clamping jaws 21 and 22 is sufficient, to keep the drum in engagement with these guides, which in turn keep the drum straight when lifting and lowering, so that it can be placed on the floor or on a stacking plate without the risk of a Tilting can be deposited or easily stacked on other drums.

ORIGINAL iNÄPECTED 309821/03? 8

- 13 -

Claims (10)

-13 claims 1.) Clamping unit for several drums on a fork, ^ forklifts or the like for clamping and lifting one or more a series of! drums, with an arm star, which to and can be raised and lowered by a drum to be raised, and a means for aligning which is suspended from the arm star of the arm star when lowering in relation to a drum, characterized in that the arm star (16) has a central depending guide part (23) with outwardly directed right-angled wall parts (24) at each corner of the guide part and parallel walls on opposite sides of the guide part, the guide part has a greater length than the distance from the top of the drum to be received to has to the center of gravity, between the parallel walls of the right-angled wall parts (24) carried by the arm star (16) Housing (20) are provided for clamping jaws, in each of which an upper and a lower clamping jaw (22, 21) is pivotably mounted and from the housing for engagement with a bead of Drum protrudes, a control lever (76) in the housing (20) is pivotably mounted and a control connection with the clamping jaws (21, 22) for advancing and retracting the clamping jaws has relative to the housing, a lever arm (19) is provided for each housing (20), which in an upward direction springs relative to the arm star (16) and movably supports each housing (20) with the clamping jaws (21, 22) on the arm star (16), an actuating frame (41) is movably attached to the arm star (16) is and has a control connection with the clamping jaws (21, 22) through the control lever and the clamping jaws when a * gripped the actuating frame (41) with the upper end of a drum in a position for gripping the bead of a Drum advances, and from the arm star (16) between the right-angled Wall parts, stop and guide devices (85) for lateral movement relative to the wall parts, the stop and guide means being generally radial and along the right-angled wall parts (24) under their bottom ■ 30 9 821/037 8 ORIGINAL INSPECTED - 14 - parts and with dimensions larger than the distance from that Upper part of a drum to the center of gravity when the actuating frame (41) engages with the upper part of the drum Have wings (97), the wings (97) along their entire height buffer parts (103) for engagement with the drum at a distance have points provided on the circumference at a uniform distance from opposite sides of the clamping jaws (21, 22), whereby the star arm (16) can be centered relative to the drum and the drum during a lifting movement of the star arm (16) and the The clamping jaws (21, 22) can be held upright in an upright position is. 2. Clamping unit according to claim 1, characterized in that the paddle (97) can be pivoted about vertical axes are attached to the guide part (23) of the arm star (16) between its right-angled wall parts (24). 3. Clamping unit according to claim 2, characterized in that the wings (97) by springs (101) in a biased centered position relative to the right-angled wall parts (24) of the central guide part (23) of the arm star (16) are. 4. Clamping unit according to one of claims 1 to 3t, characterized in that the buffer parts (103) are tubular are and extend below the wings (97) directed towards each other. 5. Clamping unit according to one of the preceding claims, characterized in that the ^A rmstern (16) limits the vertical movement of the actuating frame (41) and the actuating frame (41) one at a distance from the upper part of a drum arranged arm star (16) under the Arm star protruding, can be brought into engagement with the top of the drum stop surface (51) to move the arm star (16) relative to the actuating frame (41) when lowering the arm star (16) into engagement with the top of the drum and the Clamping 309 8 21/0328 - ₁₅ - bake (21, 22) in a position in engagement with the bead of a Position drum. 6. Clamping unit according to one of the preceding claims, characterized in that a control connection is provided between the actuating frame (41) and the arm star (16) which has a generally vertically extending slot (95) in the clamping jaw housing (20), one through the slot (95) and over at least one side of the housing (20) protruding pin (90), a pivotably attached to the housing, a fastening part for the pin (90) forming a lever (91) ', a spring (93) for pretensioning the lifting bracket having (91) downwards relative to the slot (95), and a control connection between the pin (90) and the control lever (76) and the actuating frame has an upwardly gerichtet®- ä $ n pins (90) of the case of a movement Actuating frame (41) facing towards the arm star (16) when the actuating frame (41) engages with the bead of a drum along the slot (95) leading control surface (96). 7. Clamping unit according to claim 6, characterized in that g e k e η η ζ e i chnet that the control lever (76) about the axis of the pivoting movement of the housing (20) relative to the lever arm (19) is pivotally mounted, and a control joint (80) a pivotable control connection with the upper and lower jaws (21, 22), and a control connection between the control lever (76) and the control joint (8o) is provided. · 8. Clamping unit according to claim 7, characterized in that between the control joint (80) and the g e k e η η lower jaws (21) a spring (86) for biasing the lower Jaw (21) is provided in the direction of outward movement relative to the housing (20). 9. Clamping unit according to claim 8, characterized in that g e k. e η η indicates that a pivot pin is carried by the housing (20) is and extends transversely to this, and a slot (84) in the lower jaw (21) a pivoting retraction 309821/037 8 - 16 - ??! "■■■ IO 9 movement of the lower jaw relative to the pin and the housing allows. 10. Clamping unit according to claim 9 »characterized in that the lower clamping jaw (21) is in engagement with a bead coming leading end and one below the leading end running transversely here and during the lowering movement the clamping unit has in engagement with the bead of a drum bead (21a), which in engagement with the Bead coming leading end of the clamping jaw (21) directed away from the drum and with an upward movement of the clamping unit is engageable with the bead of the drum. 'f) 9 H? 1 / (; 3? H