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EP0072697A1 - Abstützvorrichtung für fahrbare Arbeitsmaschinen - Google Patents

Abstützvorrichtung für fahrbare Arbeitsmaschinen Download PDF

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Publication number
EP0072697A1
EP0072697A1 EP82304328A EP82304328A EP0072697A1 EP 0072697 A1 EP0072697 A1 EP 0072697A1 EP 82304328 A EP82304328 A EP 82304328A EP 82304328 A EP82304328 A EP 82304328A EP 0072697 A1 EP0072697 A1 EP 0072697A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
extensible
jack cylinder
jack
extensible beam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP82304328A
Other languages
English (en)
French (fr)
Inventor
Hiroshi Miyazawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP13001981A external-priority patent/JPS5849544A/ja
Priority claimed from JP13001881A external-priority patent/JPS5849543A/ja
Priority claimed from JP13001781A external-priority patent/JPS5849542A/ja
Priority claimed from JP13001681A external-priority patent/JPS5843848A/ja
Priority claimed from JP16111981A external-priority patent/JPS5863556A/ja
Priority claimed from JP2792482A external-priority patent/JPS58145554A/ja
Priority claimed from JP2792282A external-priority patent/JPS58145552A/ja
Priority claimed from JP2792382A external-priority patent/JPS58145553A/ja
Priority claimed from JP10010882A external-priority patent/JPS58218457A/ja
Application filed by Kobe Steel Ltd filed Critical Kobe Steel Ltd
Publication of EP0072697A1 publication Critical patent/EP0072697A1/de
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/085—Ground-engaging fitting for supporting the machines while working, e.g. outriggers, legs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/72—Counterweights or supports for balancing lifting couples
    • B66C23/78—Supports, e.g. outriggers, for mobile cranes
    • B66C23/80—Supports, e.g. outriggers, for mobile cranes hydraulically actuated

Definitions

  • the present invention relates to an outrigger device to be installed on a wheel-mounted working machine, such as a truck crane, roughterrain crane, or wheel shovel and more particularly it relates to an outrigger device for wheel-mounted working machines which is so arranged as to minimize its unnecessary vertical projection and unnecessary extension from the machine width and the amount of projection of the jack cylinder above the machine and to enable the float to be received within the machine width.
  • a wheel-mounted working machine such as a truck crane, roughterrain crane, or wheel shovel
  • an outrigger device for wheel-mounted working machines which is so arranged as to minimize its unnecessary vertical projection and unnecessary extension from the machine width and the amount of projection of the jack cylinder above the machine and to enable the float to be received within the machine width.
  • each outrigger device comprises a fixed box secured to the travelling body, an extensible beam extensibly and storably fitted in said fixed box, and an extensible jack cylinder having a float on the lower end thereof, said jack cylinder being fixed in its vertical position to the front end of said extensible beam.
  • the extensible beam project laterally outwardly of the machine as long as possible.
  • the jack cylinder is so designed as to minimize its unnecessary vertical projection and unnecessary extension in the direction of the width of the machine.
  • the float mounted on the lower end of the jack cylinder will have its substantially outer half projecting outwardly of the machine width.
  • An object of the invention is to provide an outrigger device for wheel-mounted working machines which is so arranged as to minimize its unnecessary vertical projection and unnecessary extension from the machine width and the amount of projection of the jack cylinder above the machine, while enabling the float to be received within the machine width and providing protection of the jack cylinder and increased durability of the rod of the jack cylinder. Another object is to achieve the construction of such outrigger device in a very simple and rational manner.
  • the main feature of the invention consists in pivotally connecting the jack cylinder to the front end of the extensible beam to allow it to swing in a vertical plane around the axis of the pivot, and drawing said cylinder toward the extensible beam to store it in an inclined position.
  • the numeral 1 denotes a traveling body frame
  • 2 denotes a fixed box
  • 3 denotes an extensible beam extensibly and storably fitted in said fixed box
  • 4 denotes an extensible cylinder
  • 5 denotes a jack cylinder attached to the front end of said extensible beam
  • 6 denotes a float mounted on the lower end of said jack cylinder.
  • the extensible cylinder 4 is attached at its rod end to the proximal inner surface of the extensible beam and at its cylinder bottom to the distal inner surface of the fixed box 1, so that the extension and contraction of said extensible cylinder 4 cause the extensible beam to extend from the fixed box 2 and to be stored therein.
  • the jack cylinder 5 is attached to the front end of the extensible beam 3, with its cylinder tube 51 down and its rod 52 up, which is reverse to the conventional cylinder positioning, the rod end being pivotally connected to the extensible beam 3 by a horizontal pin extending transversely of the machine.
  • the jack cylinder 5 is attached to the front end of the extensible beam so that it is swingable longitudinally (widthwise) of the machine; when the outrigger is not used (during travel on a highway), said cylinder is drawn from its vertical position established by its own weight toward the beam 3, while turning around the axis of the pivot at its upper end, until it is stored in an inclined state in said beam 3, as shown in Fig. 1.
  • a projection 37 is formed on the upper end of the jack cylinder 5, i.e., on the front end of the rod 52, while a transversely and horizontally extending pusher pin 39 is installed in a bracket 40 at a position opposed to said projection 37.
  • the numeral 23 denotes a collar fitted on said pusher pin 39.
  • the projection 37 on the jack cylinder 5 will abut against the pusher pin 39 immediately before the end of a stroke for drawing the beam 3 during extensible beam storage operation and will be pushed by the pusher pin 39 on the remaining stroke, so that the jack cylinder 5 will be automatically swung into said inclined stored position.
  • abutment surface of the projection 37 associated with the pusher pin 39 is substantially L-shaped, as shown, to provide for stabilized abutted condition.
  • Locking means for holding the jack cylinder 5 in its vertical position will now be described.
  • Projections 55 are provided on transversely opposite sides of the cylinder tube 51 of the jack cylinder 5, extending from the upper end of said tube to a predetermined position on the lower portion of said tube.
  • the front inner lower surface portion of the jack cylinder 5 has fixed thereto, on transversely opposite sides, guides 31 extending along an arc having its center of curvature located at the pivot 53 of the jack cylinder 5, with the lower end surfaces of said projections 55 on the jack cylinder 5 being opposed to said guides 31.
  • the guides 31 are each formed with an engaging recess having a width capable of receiving the associated projection 55, the position of said.engaging recesses being such that a perpendicular dropped from the pivot 53 of the jack cylinder 5 coincides with the centerline of the recesses.
  • the projections 55 are positioned above said engaging recesses 32, so that extension of said cylinder causes the projections 55 to fit in the engaging recesses 32, as shown in Figs. 1 and 2.
  • notches 21 and 33 are formed in the front end lower surfaces of the fixed box 2 and extensible beam 3 to allow the swing movement of the jack cylinder 5 .
  • the numeral 25 denotes a locking hole in the front upper surface of the fixed box and 28 denotes a locking hole in the front upper surface of the extensible beam 3, said locking holes 25 and 28 being adapted to receive a locking pin 22 to lock the extensible beam 3 in its stored position.
  • the float 6 is pivotally connected to the cylinder tube 56 of the jack cylinder 5 by pins 56 extending from opposite sides of the lower end portion of the cylinder tube and received in vertically elongated openings 62 (Fig. 3) formed in float attaching seats 61.
  • the extensible beam 3 is extended outwardly laterally of the machine and the jack cylinder 5 is vertically extended, as shown in Figs. 2 and 3, to bring the float 6 into contact with the ground while floating the machine to be ready for various types of work.
  • the jack cylinder 5 since the projections 55 on the cylinder tube 51 engage the engaging recesses 32 of the guides 31 on the extensible beam 3, as described above, the jack cylinder 5 is locked in its vertical position and is thereby prevented from swaying or toppling during operation.
  • the jack cylinder 5 When it is desired to store the outrigger, the jack cylinder 5 is contracted to disengage said projections 55 from the engaging recesses 32 and then the extensible beam 3 is drawn into the fixed box 2 for storage therein.
  • the projection 37 on the upper end of the jack cylinder abuts against the pusher pin 39, so that on that portion of the stroke which starts with this abutment and ends with completion of extensible beam storage, the projection 37 is pushed by the pusher pin 39 outwardly laterally of the machine, whereby the jack cylinder 5 is swung toward the extensible beam 3 around the axis of the pin 53, until it is stored in its inclined position in the beam 3, as shown in Fig. 1.
  • the float 6 comes in intimate contact with the lower surface of the fixed box 2 while maintaining its horizontal position.
  • the jack cylinder 5 is firmly held in its inclined stored position by the abutting action between the projection 37 and the pusher pin 39, as described above, this embodiment makes doubly sure by inserting a locking pin 97 into a locking hole 58 formed in a bracket 49 mounted on the upper portion of the cylinder tube of the jack cylinder 5 and into a lacking hole 35 formed in the front end of the extensible beam, thus doubly locking the jack cylinder in its inclined stored position.
  • this outrigger device adapted to draw the jack cylinder 5 toward the extensible beam 3 while turning it around the axis of the pivot at its upper end until it is stored in its inclined position in said beam 3 when the device is not used, as described above, it is seen that when the jack cylinder 5 is brought to its vertical position to be ready for operation, said cylinder 5 causes the extensible beam 3 to project downwardly or, in other words, the jack cylinder 5 can be projected downwardly of the machine to reduce the distance from the ground, so that the cylinder 5 is required to have shorter stroke for floating the machine than in the conventional outrigger device.
  • the overall length of the" jack cylinder can be reduced by the amount corresponding thereto.
  • the outrigger device of the invention the combined effects of (1) the capability of reducing the overall length of the jack cylinder 5 and (2) the capability of projecting the cylinder 5 downwardly of the machine enables the amount of projection of the jack cylinder 5 above the machine to be greately reduced as compared with the conventional device.
  • the jack cylinder 5 interfering with pile driving and other proximity work, as in the .past, this being very advantageous from the standpoint of doing work.
  • the positional change of the jack cylinder 5 is effected in such a manner that its change to the vertical position is effected by its own weight and its change to the inclined stored position is effected by the abutting action between the projection 37 on the cylinder 5 and the pusher pin 39 on the fixed box 2, it is not necessary to provide a hydraulic cylinder or other exclusive- purpose drive source for the positional change of the jack cylinder 5. Accordingly, the related construction is very simple, the cost is low, and extra operations are not required.
  • the locking means for locking the jack cylinder 5 in its vertical position is not limited to the one shown in the embodiment; for example, locking pins adapted to resiliently pop in and out may be installed on the transversely opposite surfaces of the front end portion of the extensible beam 3 so that they may be automatically engaged in locking holes formed in the jack cylinder 5.
  • a locking pin may be manually inserted into locking holes formed in the jack cylinder 5 and extensible beam 3.
  • the jack cylinder 5 while the jack cylinder 5 is installed at the front end of the extensible beam, with the cylinder tube 51 down, it may, of course, be installed so that the cylinder tube 51 is up, as in the past.
  • the jack cylinder is drawn toward the beam while turning around the axis of the pivot at its upper end until it is stored in its inclined position in the beam, the amount of projection of the jack cylinder above the machine can be reduced as compared with the conventional device, which is advantageous to pile driving and other proximity work. Further, since the float can be received within the machine width, it is no longer necessary to remove the float for each travel on a highway, thus allowing the float diameter to be increased so as to improve safety during outrigger operation.
  • the positional change of said jack cylinder to its inclined stored position is automatically effected by the abutting action between the projection on the upper end of said cylinder and the fixed box without using any special drive source, while the change from this inclined stored position to the vertical position is effected by the weight of the cylinder.
  • an extensible cylinder 4 has a cylinder tube 41 whose proximal end is pivotally connected to the inner surface of a fixed box 2 by a horizontal shaft 42 extending transversely of the traveling body, so that said cylinder 4 is swingable in a vertical plane with respect to the fixed box 2.
  • the front end of the rod 43 of said extensible cylinder 4 is pivotally connected to a link 54 extending from the jack cylinder 5 by a horizontal shaft 44 likewise extending transversely.
  • the extensible cylinder 4 and jack cylinder 5 are interlocked so that in the early stage of extension of the extensible cylinder 4, said cylinder 4 pushes the jack cylinder 5 outwardly laterally of the extensible beam while downwardly turning around the axis of the horizontal shaft 42, while in the early stage of contraction of the extensible cylinder 4, said cylinder 4 pulls the jack cylinder 5 inwardly laterally of the extensible beam while turning it upwardly around the axis of the horizontal shaft 42.
  • the inner surface of the extensible beam 3 has fixed thereto on one or both of the transversely opposite sides thereof a stop or stops 17 against which a projection or projections 37 formed on one or both of the transversely opposite sides.
  • Projections 55 are provided on the transversely opposite sides of the cylinder tube 51 of the jack cylinder 5, extending from the upper end of said tube to a region close to the lower end. Each projection 55 is stepped so that its outer half 55a disposed adjacent the machine width projects to a greater extent than its inner half 55b (said outer half 55a and said inner half 55b being hereinafter referred to as the high land and the low land, respectively).
  • blocks 34 and 63 are fixed to the transversely opposite surfaces of the front end portion of the extensible beam 3 and engaging recesses 32 are defined between said blocks 34 and 63.
  • the engaging recesses 32 are so positioned that they will underlie the high lands 55a of the projections 55 on the jack cylinder 5 when said cylinder 5 assumes its vertical contracted position, the width of said recesses being such that the recesses are engageable by the high lands 55a.
  • the high lands 55a of the projections 55 will enter the engaging recesses 32 from above and engage the same.
  • a locking pin 7 is installed in one of the transversely opposite lower surface regions of the front end portion of the extensible beam 3 through a compression coil spring 71 so that it is capable of reciliently entering and leaving the extensible beam 3.
  • the end of the locking pin 7 projecting outside the extensible beam 3 is formed with a vertically extending long head 72, which engages the outer surfaces of a pair of cams 8 vertically spaced a predetermined distance apart from each other and fixed on the lower outer surface region of the front end portion of the fixed box 2.
  • the outer surface of each cam is formed with an inclined surface 81 downwardly sloping toward the front end of the fixed box 2.
  • the head 72 of the locking pin 7 slides along the cam surfaces 8l,.causing the locking pin 7 to project into the extensible beam 3 until the front end of said locking pin 7 abuts against the low land 55b of the associated projection 55 on the jack cylinder 5, which is in its vertical contracted positoin.
  • This abutting engagement of the locking pin 7 with the projection low land 55b prevents the jack cylinder 5 in its vertical contracted position from swinging inwardly of the extensible beam.
  • notches 21 and 33 are formed in the front lower surface regions of the fixed box 2 and extensible beam 3 to allow the swing movement of the jack cylinder 5.
  • the numeral 22 denotes a locking pin for locking the extensible beam 3 in the stored state.
  • the float 6 is installed for swing movement longitudinally of the machine, by pins 56 projecting from the transversely opposite sides of the lower end of the cylinder tube 51 of the jack cylinder 5 and received in elongated openings 62 (Fig. 8) formed in float attaching seats 61.
  • the extensible cylinder When the outrigger is used, the extensible cylinder is extended from the state shown in Fig. 5 to cause the extensible beam 3 to extend outwardly laterally of the machine, as shown in Fig. 9, and then the jack cylinder 5 is extended in its vertical position to contact the float with the ground to thereby float the machine to be ready for various types of work.
  • the jack cylinder 5 is in the illustrated inclined stored position.
  • said cylinder 4 turns downwardly around the axis of the horizontal shaft 42 while pushing the link 54 of the jack cylinder 5 by the rod 45.
  • the jack cylinder 5 is turned around the axis of the horizontal pin 53 to assume its vertical position, whereupon the extending force of the extensible cylinder 4 is applied to the extensible beam 3 through the stops 17, thereby starting extension of said beam 3.
  • the arrangement for transmitting the extending force of the extensible cylinder 4 to the extensible beam 3 from the time the jack cylinder 5 assumes its vertical position is more advantageous than an arrangement wherein the extending force is transmitted to the extensible beam 3 through the jack cylinder 5 continuously even after the jack cylinder 5 assumes its vertical position, from the standpoint of protection of the jack cylinder 5 since the high extending force does not acts on the cylinder 5.
  • the jack cylinder 5 Upon completion of extension of the extensible bema, the jack cylinder 5 is extended to bring the high lands 55a of the projections 55 into engagement with the engaging recesses 32 formed in the inner surface of the extensible beam 3, whereby the cylinder 5 is locked in its vertical extended position and thereby prevented from swaying or toppling during operation.
  • the jack cylinder 5 is contracted to disengage the high lands 55a from the engaging recesses 32, and in this state the extensible beam.3 is drawn into the fixed box 2 for storage therein.
  • the jack cylinder 5 automatically swings for a change from its vertical to inclined storage position, whereupon storage of the extensible beam 3 is started.
  • the float 6 comes in intimate contact with the lower surface of the fixed box 2, being held horizontal.
  • this outrigger device arranged so that the jack cylinder 5 is stored in its inclined state in the extensible beam 3 at the time of outrigger stor-ge, as described above, when the jack cylinder 5 is brought to its vertical position to be ready for operation, said cylinder 5 projects downwardly of the extensible beam 3 or, in other words, the jack cylinder 5 is projected downwardly to reduce the distance from the ground, so that the required stroke for said cylinder to float the machine is reduced as compared with the conventional device.
  • the overall length of the jack cylinder 5 can be reduced by the corresponding amount.
  • the jack cylinder 5 is adapted to be projected in its vertical position downwardly of the machine, the amount of projection of said cylinder above the machine can be correspondingly reduced.
  • the present device since the positional change of the jack cylinder 5 between the vertical position and the inclined stored position automatically and forcibly effected by utilizing the extension and contraction of the extensible cylinder 4, the reliability of the positional change of the jack cylinder'is high and there is no need to perform extra operations.
  • the extensible cylinder 4 is attached to the fixed box 2 and interlocked to the jack cylinder 5 so that it may swing in operative association with the jack cylinder 5, the construction is simpler than a construction wherein an unswignable extensible cylinder and a swingable jack cylinder are interlocked to each other through an intermediate transmission mechanism, such as a link meachanism; there is no danger of causing troubles, such as the positional change of the jack cylinder 5 being unnecessarily accelerated by the accelerating action of such intermediate transmission mechanism.
  • an intermediate transmission mechanism such as a link meachanism
  • the jack cylinder 5 may be installed with the cylinder tube 51 up, as in the conventional arrangement.
  • the extensible cylinder 4 will be connected to the cylinder tube 51 of the jack cylinder 5; the two components 4 and 51 may be directly pivotally connected together without using a link such as the link 54 in the above embodiment.
  • the locking means for locking the jack cylinder 5 in its vertical extended position is not limited to the above embodiment; for example, locking pins adapted to resiliently come in and out may be provided in the transversely opposite surfaces of the front end portion of the extensible beam 3 so that said locking pins may be automatically engaged in locking holes formed in the jack cylinder 5. Alternatively, a locking pin may be manually inserted into locking holes formed in the jack cylinder 5 and extensible beam 3.
  • an auxiliary extensible cylinder 92 has a cylinder tube 92a pivotally connected at its distal end to an intermediate surface region 85 of an extensible beam 3 by horizontal shaft 90 extending transversely of the traveling body, whereby the cylinder 92 is attached to the extensible beam 3 so taht it is swingable in a vertical plane.
  • the front end of the rod 91 of the auxiliary cylinder 92 is pivotally connected to a link 54 projecting from a jack cylinder 5 by a horizontal shaft 44 likewise extending transversely. That is, the auxiliary extensible cylinder 92, which has exactly the same functioning as that of the extensible cylinder 4 associated with the jack cylinder 5 of Fig.
  • the extensible cylinder 4 is connected at the distal end of its cylinder tube 41 to a fixed point.15 on the inner surface of the fixed box 2 and is connected to a connecting rod 11 disposed at the end of the rod 43 of the cylinder nearer to the jack cylinder 5, the arrangement being such that the extending thrust of the rod 43 of the extensible cylinder 4 acts directly on the extensible beam 3 from the time the jack cylinder 5 assumes its vertical position under the thrust of the auxiliary extensible cylinder 92, thereby effecting extension of the extensible beam 3.
  • the auxiliary extensible cylinder 92 serves to effect only the positional change of the jack cylinder 5 from its vertical to stored position and vice versa, while the extensible cylinder 4 serves to effect only the extension of the extensible beam 3. Therefore, part of the extension of the extensible cylinder compensates for the amount consumed for the positional change of the jack cylinder to its vertical position,-thereby making it possible to further extend the extensible beam.
  • the large diameter of the outrigger device is particularly effective in increasing the stability of the machine frame.
  • a jack cylinder 5 is installed at the front end of an extensible beam 3, with a cylinder tube 51 up and a rod 52 down, which is reverse to the conventional positioning, the rod end being pivotally connected to the extensible beam 3 by a horizontal pin 53. extending transversely of the machine.
  • the jack cylinder 5 is attached to the front end of the extensible beam so that it is swingable around the axis of the pivot at its upper end longitudinally (widthwise) of the machine.
  • the cylinder 5 is drawn from its vertical position inwardly laterally of the extensible beam 3 while turning around the axis of the pivot at its upper end until it is stored in its inclined position in said beam 3, as shown in Fig. 11.
  • the jack cylinder 5 is provided with a link 54 projecting downwardly from the upper end of said rod, the lower end of said link 54 being pivotally connected to the front end of the rod 43 of the extensible cylinder 4 by a tarnsversely extending horizontal shaft 44.
  • the extensible cylinder 4 and jack cylinder 5 are interlocked to each other so that in the early stage of extension of the extensible cylinder 4, said cylinder 4 pushes the jack cylinder 5 outwardly laterally of the extensible beam while turning downwardly around the axis of the horizontal shaft 42, while during contraction of the extensible cylinder 4, reversely, said cylinder 4 pulls the jack cylinder 5 inwardly laterally of the extensible beam while turning upwardly around the axis of the horizontal shaft 42.
  • the upper end of the link 54 at the jack cylinder 5 is integrally formed with a locking arm 67 extending through an opening 30 in the front upper surface region of the extensible beam 3 to enter the front end portion of the fixed box 2 with the extensible beam in its stored position.
  • a transversely extending horizontal locking rod 20 In the front end portion of the fixed box 2 which said locking arm 67 enters, there is fixed a transversely extending horizontal locking rod 20, so that when the jack cylinder 5 assumes its inclined stored position, said locking arm 55 engages said locking rod 20 in the beam extensing direction, but when the jack cylinder 5 is turned into its vertical position, the locking arm 67 is disengaged from the locking rod 20.
  • Engaging projections 55 are provided on the transversely opposite sides of the cylinder tube 51 of the jack cylinder 5, extending from the upper end of said tube to a region close to the lower end.
  • the transversely opposite inner surfaces of the front end portion of the extensible beam 3 are provided with guide projections 32 along the path of movement described by the lower end surfaces of said projections 55 during swing movement of the jack cylinder 5.
  • Each guide projection 32 has at its initial end (nearer to the inner lateral end of the beam) a stop portion 32a which comes in adjacent opposed relation to the lower end surface of the associated engaging projection 55 when the jack cylinder 5 is stored in its inclined position, so that when the jack cylinder 5 in its inclined stored position is operated for extension by mistake, the engaging projections 55 strike the stop portions 32a to thereby prevent extension of the jack cylinder 5.
  • the guide projection is provided with an engaging recess 32b adjacent the terminal end thereof.
  • the engaging recesses 32b are so positioned that they are opposed to the engaging projections 55 on said jack cylinder 5 when the latter assumes its vertical contracted position, the width of said engaging recesses being such that they are engageable by said projections 55.
  • the engaging projection 55 will engage the engaging recesses 32b from above.
  • the lower ends of said projections 55 and the upper open portions of said engaging recesses are formed with inclined guide surfaces 32 and 32c.
  • the terminal end portion including the engaging recess 32b may be formed separately from the remaining portion and removably attached to the latter as by bolts to enable replacement in case of wear.
  • a locking pin 7 is installed in one of the transversely opposite lower surface regions of the front end portion of the extensible beam 3 through a compression coil spring 71 so that it resiliently comes in and out of the extensible beam 3.
  • the end of the locking pin projecting outside the extensible beam 3 is formed with a vertically elongated head 72, which engages the outer surfaces 8 of a pair of cams 8 vertically spaced a predetermined distance apart from each other and fixed to the lwoer outer surface region of the front end portion of the fixed box 2.
  • each cam is formed with an inclined cam surface 81 which, when seen in plan view, slopes down toward the front end of the fixed box 2.
  • the numeral 18 denotes a groove for leading the locking pin head 72 into the outside of the fixed box 2. Further, the lower surface of the front end portions of the fixed box 2 and extensible beam 3 are formed with notches 21 and 33 to allow the swing movement of the jack cylinder 5.
  • the numeral 83 denotes a locking pin for locking the extensible beam 3 in its stored state.
  • the float 6 is swingably installed by pins 56 projecting from the transversely opposite sides of the lower end portion of the cylinder tube 51 of the jack cylinder 5 and inserted in elongated openings 62 formed in float attaching seats 61.
  • the extensible cylinder 4 When the outrigger is used, the extensible cylinder 4 is extended from its state shown in Fig. 11 to extend the extensible beam 3 outwardly laterally of the machine, as shown in Fig. 17 and then the jack cylinder 5 is extended in its vertical position to bring the float 6 into contact with the ground to float the machine to be ready for various types of work.
  • the jack cylinder 5 is in the illustrated inclined storage position.
  • said cylinder 4 starts to extend to cause extension of the extensible beam 3, said cylinder 4, while turning downwardly around the axis of the horizontal shaft 42, as described above, pushes the link 54 of the jack cylinder 5 by the rod 43.
  • the jack cylinder 5 is turned around the axis of the horizontal pin 53 to assume its vertical position, whereupon the extending force of the extensible cylinder 4 is applied to the extensible beam 3, starting extension of the beam 3.
  • the jack cylinder 5 Upon completion of extension of the extensible beam, the jack cylinder 5 is extended to cause the engaging projections 55 to engage the engaging recesses 32b of the guide projections 32 on the extensible beam 3, whereby the cylinder 5 is locked in its vertical extended position and prevented from swaying or toppling during operation.
  • the jack cylinder 5 When it is desired to store the outrigger, the jack cylinder 5 is contracted to disengage the engaging projections 55 from the engaging recesses 32b and then the extensible beam 3 is drawn into the fixed box 2 for storage therein.
  • the contraction of the extensible cylinder 4 pulls the jack cylinder 5 inwardly laterally of the extensible beam, but the jack cylinder 5 is prevented from swinging by the locking pin 7. Therefore, during beam storage stroke, the jack cylinder 5 is held in its vertical contracted position and the contracting force of the extensible cylinder 4 is transmitted to the extensible beam 3 through the jack cylinder 5 and locking pin 7.
  • the head 72 of the locking pin 7 slides along the cam surfaces 81 of the cams 8, thus pulling the locking pin 7 outwardly of the beam and releasing said pin 7 from the engaging projection 55 on the jack cylinder 5. Since this unlocks the jack cylinder 5, which is in its vertical position, the jack cylinder 5 is pulled by the extensible cylinder 4 from the time the storage of the extensible beam 3 is completed, automatically changing from its vertical to inclined position, finally assuming the state shown in Fig. 11. At this instant, the float 6 comes in contact with the lower surface of the fixed box 2 while it is horizontal.
  • the present device has the following merits concerning prevention of malfunction.
  • the first problem is about malfunction of the jack cylinder.
  • the jack cylinder 5 is operated for extension by mistake before the extending operation of the extensible beam 3.
  • this causes trouble to the extension of the extensible beam 3 and to the subsequent operation, making it impossible to install the outrigger.
  • the engaging projections 55 on the jack cylinder 5 abut against the stop portions 32a of the initial end 32a of the guide projections 32 on the extensible beam 3, it is possible to prevent the jack cylinder 5 from extending by mistake.
  • the extensible beam 3 is operated for extension without the operator's knowledge of the situation where the engaging projections are pressed against the stop portions 32a.
  • the resisting force due to the forced contact between the engaging projections 55 and the stop portions 32a (hereinafter referred to simply as the resisting force) is lower than the beam extending thrust due to the extensible cylinder 4 (hereinafter referred to simply as the extending thrust)
  • the extending thrust overcomes the resisting force and forces the jack cylinder 5 to swing to its vertical position.
  • said resisting force against the swing of the cylinder 5 includes the rusting of the pivot around which it swings.
  • the stop portions 32a for preventing extension of the jack cylinder 5 in its inclined stored position have been provided as part of the guide projections 32, but the stops 32 may be provided singly, not as the guide projections.
  • the jack cylinder 5 is installed with the cylinder tube 51 down and the rod 52 up, which is reverse to the conventional positioning, since the rod 51 is hidden in the extensible beam 3, likely damage to the rod 52 and incidental oil leakage and malfunction can be prevented and machining to be applied to the locking means, etc., may be applied to the cylinder tube 51, so that such machining is easy to perform.
  • it may be installed with the cylinder tube 51 up, as in the conventional arrangement.
  • locking means for locking the jack cylinder 5 in its vertical extended position is not limited to the above embodiment; for example, locking pins adapted to resiliently come in and out may be provided in the transversely opposite surfaces of the front end portion of the extensible beam 3 so that said locking pins may be automatically engaged in locking holes formed in the jack cylinder 5. Alternatively, a locking pin may be manually inserted into locking holes formed in the jack cylinder 5 and extensible beam 3.
  • the jack cylinder and extensible beam are respectively provided with projections adapted to be opposed to each other axially of the jack cylinder when the latter is in its inclined stored position, which projections thus constitute a stop mechanism, it is possible to prevent extension of the jack cylinder when the latter is operated for extension by mistake when it is in its inclined stored position. Further, if the jack cylinder becomes incapable of swing, it is possible to prevent extension of the extensible beam by the engaging action between the locking arm provided on the jack cylinder and the locking rod provided in the fixed box, thereby ensuring the proper outrigger extending operation and increasing the reliability of the device.
  • the numerals 2, 3 and 12 denote extensible beams telescopically fitted together.
  • Extensible cylinders 4 and 4P are provided for extending said extensible beams, and a jack cylinder 5 is swingably provided at the front end of the foremost beam 3.
  • the extensible cylinder 4P has a cylinder tube 4Q fixed at its proximal end to the inner surface of a fixed box 2 at a fixed point 15, and a cylinder rod 13 connected at its front end to the outer extensible beam 12 by a connecting member 11.
  • the extensible beam 4 has a cylinder tube 41 pivotally connected at its proximal end to the inner surface 86 of the extensible beam 12 by a horizontal shaft 84 extending transversely of the traveling body, whereby the cylinder 4 is attached to the extensible beam 12 so that it is swingable in a vertical plane.
  • the front end of the rod 43 of the extensible cylinder 4 is pivotally connected to a link 54 projecting from the jack cylinder 5 by a transversely extending horizontal shaft 44. That is, the arrangement is such that the extensible cylinder 4 which was pivotally connected at 42 to the fixed box 2 in Fig. 6 is pivotally connected at 84 to the inner surface of the extensible beam 12, instead of being pivotally connected to the fixed box 2.
  • the thrust of the front extensible cylinder 4 moves the jack cylinder 5 to its vertical position, and then the extensible beam 3 starts to advance. Meanwhile, the forward movement of the extensible cylinder rod 13 of the extensible cylinder 4P causes the extensible beam 12 connected thereto by the connecting member 11 to advance toward the front end. Meanwhile, the foremost beam 3 advances under the thrust of the rod 43 of the extensible cylinder 4 pivotally connected to the inner surface of the extensible beam 12. Therefore, the extensible beams 3 and 12 can be extended the sum of the amounts of forward travel the extensible- cylinders 43 and 13. It is so arranged that said length of extension can be obtained by adjusting the amounts of forward travel of the cylinder rods 43 and 13.
  • the amount of extension of the extensible beam assembly is greately increased and the large inner diameter of the outrigger device is particularly effective in increasing the stability of the machine frame in the case of handling heavy objects.
  • an extensible cylinder 4 is connected at the proximal end of its cylinder tube 41 to the inner surface of a fixed box 2 and at the front end of its rod 43 to the front inner surface region of an extensible beam 3, so that extension and contraction of the extensible cylinder 4 enable the extensible beam 3 to be extended from and stored inthe fixed box 2.
  • the rod end of the extensible cylinder 4 and the extensible beam 3 are interconnected in the following manner.
  • a backet 40 is fixed to the rod end of the extensible cylinder 4, said bracket 40 being formed with an elongated opening 45 extending in the direction of extension and contraction of said cylinder. Further, a horizontal pin 29 extending transversely of the machine is fixed in the interior of the front end portion of the extensible beam 3, said pin 29 being inserted in the elongated opening 45 so that it is movable within the range of constant length.
  • the rod 43 of the extensible cylinder 4 is connected to the extensible beam 3 so that within the range of constant length it is capable of extension and of free movement (lost motion) in the storing direction.
  • a pin 56 extending transversly of the! machine is fixed to the front end of the bracket 40 fixed to the rod end of the extensible cylinder 4, said pin 56 being engaged in an elongated opening 46 formed in a bracket 49 fixed to the outer surface of the cylinder tube 51 of the jack cylinder 5.
  • the elongated opening 46 extends axially of the jack cylinder 5, and the extensible cylinder 4 and jack cylinder 5 are operatively interconnected through said elongated opening 46 and pin 56.
  • a locking pin 7 is installed in one of the transversely opposite lower surface regions of the front end portion of the extensible beam 3 through a compression coil spring 71 so that it is capable of resiliently entering and leaving the extensible beam 3.
  • the end of the locking pin 7 projecting outside the extensible beam -3 is formed with a vertically extending long head 72 engaged with the outer surfaces of a pair of cams 8 spaced a predetermined distance apart from each other and fixed to the lower outer surface region of the front end portion of the fixed box 2.
  • the outer surfaces of the cams are each formed with an inclined cam surface 81 sloping downwardly toward the front end of the fixed box 2, so that as the extensible beam 3 extends, the head 72 of the locking pin 7 slides along the cam surfaces 81, causing the locking pin 7 to project into the extensible beam 3.
  • a locking plate 57 having a locking hole 77 is fixed to the region of the outer surface of the cylinder tube 51 of the jack cylinder 5 opposed to the locking pin 7, so that when the jack cylinder 5 assumes its vertical position, the locking pin 7 faces the locking hole 77 of the locking plate 57 and projects into the extensible beam until its front end engages the locking hole 77. This engagement of the locking pin 7 with the locking hole 77 prevents the jack cylinder 5 in its vertical contracted position from swinging inwardly laterally of the beam.
  • notches 21 are formed in the front lower surface regions of the fixed box 2 and extensible beam 3 to allow the swing movement of the jack cylinder 5.
  • the numeral 22 denotes a locking pin for locking the extensible beam 3 in its stored position
  • 83 denotes a stop for defining the storage position of the beam 3. From the standpoint of safety it is desirable to provide the proximal end of the extensible beam 3 and the front end of the fixed box with stops (not shown) for limiting the amount of extension of said beam 3 to a constant value.
  • the float 6 is swingably installed by pins 62 projecting from the transversely opposite sides of the lower end portion of the rod 52 of the jack cylinder 5 and inserted in elongated holes 62 formed in float attaching seats 61 (Fig. 19).
  • the extensible cylinder 4 When the outrigger is used, the extensible cylinder 4 is extended from its state shown in Fig. 19 to extend the extensible beam 3 outwardly laterally of the machine, as shown in Fig. 23 and then the jack cylinder 5 is extended in its vertical position to bring the float 6 into contact with the ground to float the machine to be ready for various types of work.
  • the rod 43 of the cylinder 4 performs lost motion (sole motion) within the range of the distance of free movement of the pin 29 in the elongated opening 45 in the bracket 40, and during the lost motion stroke of the rod 43 the jack cylinder 5 is pushed by said rod 43 and thereby automatically and forcibly moved from its inclined stored position to its vertical position shown in Fig. 2a.
  • the pin 29 completes its movement in the elongated opening 45, so that extension of the extensible beam 3 is then started.
  • the jack cylinder 5 when the jack cylinder 5 is extended to bring the float into contact with the ground after the extension of the extensible beam, the jack cylinder 5 is locked in its vertical position by the extensible cylinder 4 and said locking mechanism, being prevented from swaying or toppling during operation.
  • the extensible beam 3 When it is desired to store the outrigger, with the jack cylinder 5 contracted, the extensible beam 3 is drawn into the fixed box 2 for storage therein.
  • the rod 43 of the extensible cylinder 4 tends to move alone in the direction opposite to that of extension, but since the jack cylinder 5 is prevented from swinging toward its inclined stored position by the locking pin 7, the extensible beam 3 starts to move as soon as the rod 43 of the extensible cylinder moves.
  • the head 72 of the locking pin 7 climbs up the cam surfaces 81 of the cams 8, releasing said locking pin 7 from the locking hole 77 and thereby unlocking the jack cylinder 5 in its vertical contracted position.
  • the rod 43 of the extensible cylinder 4 moves alone in the direction opposite to that of extension, during which time the jack cylinder 5 is pulled by the rod 43 and thereby automatically changes from its vertical position shown in Fig. 20 to its inclined stored position shown in F ig. 43.
  • the float 6, in the horizontal state contacts the lower surface of the fixed box 2.
  • jack cylinder 5 is attached to the front end of the extensible beam with the cylinder tube 51 up, but it may be pivotally connected to the front end of the extensible beam in reverse, with the cylinder tube down and the rod 52 up.
  • Such arrangement is advantageous in that since the rod 52 is hidden in the beam 3, likely damage to the rod 52 and incidental oil leakage and malfunction can be prevented.
  • a bracket 40 is fixed to the rod end of an extensible cylinder 4 and formed with an elongated opening 45 extending in the direciton of extension and contraction of said cylinder.
  • An extensible beam 3 has two horizontal pins 29 and 50 internally fixed thereto in its front end portion, the distance between said pins being smaller than the length of said elongated opening 45, said pins 29 and 50 being inserted in said elongated opening 45 so that they are movable along the latter in the range of constant length.
  • the rod 43 of the extensible cylinder 4 is connected to the extensible beam 3 so that it is capable of extension in the range of constant length and free movement (lost motion) in the storing direction.
  • the bracket 40 fixed to the rod end of the extensible cylinder 4 is operatively connected to a jack cylinder 5 successively through a link attaching seat 48 fixed to the lower end of said bracket, a link mechanism 10 consisting of first and second links 79 and 80, and a link attaching seat 78 fixed to the front end of the rod of the jack cylinder 5.
  • the first link 79 of the link mechanism 10 is doglegged and pivotally connected at its middle to the extensible beam 3 by a fixed pin 79.
  • the second link 80 is pivotally connected to the first link 79 by a movable pin 73 so that the links are turnable relative to each other.
  • the first link 79 and the link attaching seat 48 are pivotally connected together through an elongated opening 46 so as to convert the linear motion of the rod 43 into the rotary motion of the first link 79.
  • Locking means for locking the jack cylinder 5 in its vertical extended position will now be described.
  • Projections 55 are formed on the transversely opposite sides of the cylinder tube 51 of the jack cylinder 5, extending from the upper end of said tube to a region close to the lower end. Each projection 55 is stepped so that the outer half 55a disposed adjacent the machine width projects to a greater extent than its inner half 55b (said outer half 55a and said inner half 55b being hereinafter referred to as the high land and the low land, respectively).
  • blocks 34 and 63 are fixed to the transversely opposite surfaces of the front end portion of the extensible beam 3 and engaging recesses 32 are defined between said blocks 34 and 63.
  • the engaging recesses 32 are so positioned that they will underlie -the high lands 55a of the projections 55 on the jack cylinder 5 when said cylinder 5 assumes its vertical contracted position, the width of said recesses being such that the recesses are engageable by the high lands 55a.
  • the high lands 55a of the projections 55 will enter the engaging recesses from above and engage the same.
  • a locking pin 7 is installed in one of the transversely opposite lower surface regions of the front end portion of the extensible beam 3 through a compression coil spring 71 so that it is capable of resiliently entering and leaving the extensible beam 3.
  • the end of the locking pin 7 projecting outside the extensible beam 3 is formed with a vertically extending long head 82, which engages the outer surfaces of a pair of cams 8 vertically spaced a predetermined distance apart from each other and fixed on the lower outer surface region of the front end portion of the fixed box 2.
  • the outer surface of each cam is formed with an inclined surface 81 downwardly sloping toward the front end of the fixed box 2.
  • the head 82 of the locking pin 7 slides along the cam surfaces 81, causing the locking pin 7 _to project into the extensible beam 3 until the front end of said locking pin 7 abuts against the low land 55b of the associated projection 55 on the jack cylinder 5, which is in its vertical contracted position.
  • This abutting engagement of the locking pin 7 with the projection low land 55b prevents the jack cylinder 5 in its vertical contracted position from swinging inwardly of the extensible beam 3.
  • notches 21 and 33 are formed in the front lower surface regions of the fixed box 2 and extensible beam 3 to allow the swing movement of the jack cylinder 5.
  • the numeral 24 denotes a locking pin for locking the extensible beam 3 in its stored state
  • 83 denotes a stop for defining the storage position of the beam 3. From the stanpoint of safety it is desirable to provide the proximal end of the extensible beam 3 and the front end of the fixed box 2 with stops (not shown) for limiting the amount of extension of said beam 3 to a constant value.
  • a projection 37 is formed on the upper end of the jack cylinder 5, i.e., on the front end of the rod 52,-while a transversely extending horizontal pusher pin 39 is fixed to the front upper portion of a fixed box 2 at a level corresponding to that of said projection through the intermediary of a -bracket 40.
  • the numeral ' 23 denotes a collar fitted on said pusher pin 39.
  • the projection 37 on the jack cylinder 5 will abut against the pusher pin 39 immediately before the end of a stroke for drawing the beam 3 during extensible beam storage operation and will be pushed by the pusher pin 39 on the remaining stroke, so that the jack cylinder 5 will be automatically swung into its inclined stored position.
  • the abutment surface of the projection 37 associated with the pusher pin 39 is doglegged, as shown, to provide for stabilized abutted condition.
  • Projections 55 of U-shaped cross-section are provided on the transversely opposite sides of the cylinder tube 51 of the jack cylinder 5, extending from the upper end of said tube to a predetermined lower position, and a roller 59 is rotatably attached to the lower end of said projection in such a manner as to project downwardly beyond said lower end to some extent.
  • the transversely opposite inner surfaces of the extensible beam 3 are integrally formed with cams 98 each having a cam surface 99 on their upper surface, said cams being positioned below said rollers 59.
  • each cam 99 is formed along an inclined arcuate path which extends to recede from said roller 59 as the jack cylinder 5 moves from its inclined stored to vertical position, or which has its center of curvature located at point 0 2 (Fig. 28) which is spaced from the pivot axis 0 1 of the jack cylinder 5 laterally outside the machine, so that when the jack cylinder 5 is in its inclined stored position, the roller 59 is in contact with the inner end of the cam surface 99.
  • the cam surface may not be the described arcuate curved surface but a straight inclined surface extending along said inclined path.
  • the portion of the cam 98 extending outwardly from the surface 99 is horizontal and is formed with an engaging recess 32.
  • the engaging recess 32 has such a width that it is engageable by the associated projection 55 on the jack cylinder 5, and the recess is so positioned as to be bisected by a perpendicular dropped from the pivot axis O 1 of the jack cylinder 5.
  • the projections 55 overlie the engaging recesses 32, and when the jack cylinder 5 is extended in this position, the recesses 55 descend to engage the engaging recesses 32.
  • notches 21 and 33 are formed in the front lower surface regions of the fixed box 2 and extensible beam 3 to allow the swing movement of the jack cylinder 5.
  • an extensible beam 3 has two horizontal pins 29 and 50 internally fixed thereto in its front end portion, the distance between said pins being smaller than the length of an elongated opening 45, said pins being inserted in said elongated opening 45 so that they are movable within the range of constant length.
  • the arrangement is such that the rod 43 of an extensible cylinder 4 is capable of extension within the range of constant length with respect to the extensible beam 3 and of free movement (lost motion) in the storing direction.
  • a bracket 40 fixed to the rod end of the extensible cylinder 4 is operatively connected to a jack cylinder 5 successively through a link attaching seat 48 fixed to the lower end of said bracket, a link mechanism consisting of first and second links 79 and 80, and a link attaching seat 78 fixed to the front end of the rod of the jack cylinder 5.
  • the first link 79 of the link mechanism is doglegged and pivotally connected at its middle to the extensible beam 3 by a fixed pin 65.
  • the second link 80 is pivotally connected to the first link _79 by a movable pin 73 so that the links are turnable relative to each other.
  • the first link 79 and the link attaching seat 48 are pivotally connected together through an elongated opening 46 so.as to convert the linear motion of the rod into the rotary motion of the first link 79.
  • Locking means for locking the jack cylinder 5 in its vertical extended position will now be described.
  • Projections 55 are formed on the transversely opposite sides of the cylinder tube 51 of the jack cylinder 5, extending from the upper end of said tube to a region close to the lower end. Each projection 55 is stepped so that the outer half 55a disposed adjacent the machine width projects to a greater extent than the inner half 55b (said outer half 55a and said inner half 55b being hereinafter referred to as the high land and the low land, respectively).
  • blocks 34 and 63 are fixed to the transversely opposite surfaces of the front end portion of the extensible beam 3 and engaging recesses 32 are defined between said blocks 34 and 63.
  • the engaging recesses 32 are so positioned that they will underlie the high lands 55a of the projections 55 on the jack cylinder 5 when said cylinder assumes its vertical contracted position, the width of said recesses being such that the recesses are engageable by the high lands 55a.
  • the high lands 55a of the projections 55 will enter the engaging recesses from above and engage the same.
  • a locking pin 7 is installed in one of the transversely, opposite lower surface regions of the front end portion of the extensible beam 3 through a compression spring 71 so that it is capable of resiliently entering and leaving the extensible beam 3.
  • the end of the locking pin 7 projecting outside the extensible beam 3 is formed with a vertically extending long head 82, which engages the outer surfaces of a pair of cams 8 vertically spaced a predetermined distance apart from each other and fixed on the lower outer surface region of the front end portion of the fixed box 2.
  • the outer surface of each cam is formed with an inclined cam surface 81 downwardly sloping toward the front end of the fixed box 2.
  • the head 82 of the locking pin 7 slides along the cam surfaces 81, causing the locking pin 7 to project into the extensible beam 3 until the front end of said locking pin 7 abuts against the low land 55b of the associated projection on the jack cylinder 5, which is in its vertical contracted position.
  • This abutting engagement of the locking pin 7 with the projection low land prevents the jack cylinder 5 from swinging inwardly of the extensible beam 3.
  • a pinion 52 is installed at the upper end of a jack cylinder 5, i.e., at the front end of a rod 52 pivotally connected to an extensible beam 3, while a rack 19 is fixed to the front end of a fixed box 2, which rack is adapted to mesh with said pinion from above when the extensible beam 3 is in its stored state.
  • the rack 19 meshes with the pinion 47 when the extensible beam 3 is in its state, the meshing force holding the jack cylinder 5 in its inclined stored position.
  • the rack 19 meshes with the pinion 47, automatically swinging the jack cylinder 5 from its inclined stored to vertical position and vice versa.
  • the top portions of the two outer teeth 19a and 19b of the rack are stepwise cut off.
  • Locking means for holding the jack cylinder 5 in its vertical position will now be described.
  • Projections 55 are provided on the transversely opposite sides of the cylinder tube 51 of the jack cylinder 5, extending from the upper end of said tube to a predetermined position of the lower portion.
  • guides 31 extending along an arcuate curve having its center of curvature located at the axis of the pivot 53 of the jack cylinder 5 are fixed to the transversely opposite lower inner surface regions of the front end portion of the extensible beam 3, with the lower end surfaces of said projections 55 on the jack cylinder 5 being opposed to said guides 31.
  • Each guide 31 is formed with an engaging recess 32 whose centerline coincides with a perpendicular dropped from the pivot axis 53 of the jack cylinder 5 and whose width is such that the engaging recess is engageable by the associated projection 55.
  • notches 21 and 33 are formed in the front lower surface regions of the fixed box 2 and extensible beam 3 to allow the swing movement of the jack cylinder 5.
  • the numeral 25 denotes a locking hole formed in the front upper surface region of the fixed box 2, and 28 denotes a locking hole formed in the front upper surface region of the extensible beam 3.
  • a locking pin 22 is inserted in these locking holes 25 and 28 to lock the extensible beam 3 in its stored state.
  • the jack cylinder 5 when the outrigger is used, with the extensible beam 3 extended outwardly laterally of the machine the jack cylinder 5 is extended in its vertical position to bring the float 6 into contact with the ground to float the machine to be ready for various types of work.
  • the jack cylinder 5 is locked in its vertical position in that the projections 55 on the jack cylinder 5 engage the engaging recesses 32 of the guides 31 on the extensible beam 3, whereby the jack cylinder is prevented from swaying or toppling during operation.
  • the present device is so arranged that the swing movement of the jack cylinder 5 between its vertical position and its inclined stored position is effected by the engagement between the pinion 47 on the upper end of the jack cylinder 5 and the rack 19 on the fixed box 2, as described above, there is no need to provide an exclusive drive source, such as a hydraulic cylinder, for swinging the jack cylinder 5, so that the construction is very simple, the cost is low, and extra operations are unnecessary. Further, the change of the jack cylinder 5 from its inclined stored to vertical position and vice versa can be reliably and smoothly effected.
  • a rack 19 is fixed to the upper end of the outer side of the cylinder tube 51 of a jack cylinder 5 and at a position where it is opposed to the outer side of an extensible beam 3, said rack being upright with its teeth directed inwardly laterally of the beam.
  • a pinion 47 is fitted on a horizontal pin 53 which provides a pivot axis for said cylinder 5, said pinion being fixed to said pin 53 by a bolt 27 with its teeth directed outwardly laterally of the extensible beam.
  • the jack cylinder 5 is provided with the rack 19 adapted to move axially of the jack cylinder 5 as the latter extends and contracts, while the extensible beam 3 is provided with the pinion 47 fixed thereto.
  • the uppermost tooth 19a of the rack 19 has its top portion cut off so that it is shorter than the other teeth, as shown in Fig. 38; thus, when the jack cylinder 5 is contracted in its vertical position, the uppermost tooth 19a meshes with a particular tooth 47a (hereinafter referred to as the meshing tooth) of the pinion from below in the terminal contraction stage (immediately before completion of contraction).
  • Locking means for holding the jack cylinder 5 in its vertical position will now be described.
  • Guides 31 extending along an arcuate curve having its center of curvature located at the axis of the pivot 53 of the jack cylinder 5 are fixed to the transversely opposite lower inner surface regions of the front end portion of the extensible beam 3, with the lower end surfaces of projections 55 on the jack cylinder 5 being opposed ⁇ to said guides 31.
  • Each guide 31 is formed with an engaging recess 32 whose conterline coincides with a perpendicular dropped from the axis of the pivot 53 of the jack cylinder 5 and whose width is such that the engaging recess is engageable by the associated projection 55.
  • the projections 55 overlie the engaging recesses 32, and when said jack cylinder 5 is extended, the projections 55 enter the engaging recesses 32 and engage the same, as shown in Fig. 36 and 37.
  • notches 21 and 33 are formed in the front lower surface regions of the fixed box 2 and extensible beam 3 to allow the swing movement of the jack cylinder 5.
  • the numeral 25 denotes a locking hole formed in the front upper surface region of the fixed box 2, and 28 denotes a locking hole formed in the front upper surface region of the extensible beam 3.
  • a locking pin 22 is inserted in these holes 25 and 28 to lock the extensible beam 3 in its stored state.
  • the device is so arranged that a jack cylinder 5 and a rack 16 execute unitary movement only in the terminal stage of contraction and the initial stage of extension of said cylinder 5 but that thereafter the rack 16 is Separated from the jack cylinder 5 and maintained meshing with a pinion 47.
  • the preceding embodiment is modified so that an L-shaped rack fitting frame 60 is fixed to the upper end of the outer side of the cylinder tube of the jack cylinder 5 to which the rack 19 of the preceding embodiment was fixed.
  • the rack fitting frame 60 has an upwardly opened keyhole-like notch 60a in its upper end.
  • the rack 16 is separate from the jack cylinder 5 and its lower portion is formed with a leg 69, the root of which is formed with a stepped hole 70 in which an engaging body 74 is installed through a spring 76 so that said body is capable of resiliently coming-in and out.
  • the transversely opposite surfaces of said rack 16 are each formed with a vertically extending groove 75.
  • a pair of transversely spaced projections 37 are provided on the upper inner surface region of the front end portion of the extensible beam 3, and pin-receiving holes 37a are formed in said projections 37 in their upper and lower regions. Cylindrical bodies 37b are fixed to the outer surfaces of said projections 37 at the positions where said pin-receiving holes 37a are formed.
  • Rack retaining pins 38 are resiliently held in the cylindrical bodies 37b through springs 38a so that their front ends normally project outside the pin-receiving holes 37a.
  • a pusher pin 39 is fixed to the front end wall of the extensible beam 3 and below said projections 37.
  • the front end surface 39a of the pusher pin 39 and the front end surface 74a of the engaging body 74 are in the form of inclined surfaces complementary to each other.
  • the rack 16 and pinion 47 are in mesh all the time, and when the jack cylinder 5 is in its extended position, the rack 16 is separated from the cylinder 5.
  • the rack 16 is held in the extensible beam 4 by being nipped between the rack retaining pins 38 fitted in the grooves 75.
  • the pusher pin 39 is fitted in the stepped hole 70 of the rack 16 and pushes the engaging body 74 into the stepped hole 70.
  • the rack fitting frame 60 engages the rack 16 in the terminal stage of contraction and the contracting force of said cylinder 5, i.e., the lifting force of the cylinder tube 51 is applied to the area of engagement between the rack 16 and the pinion 31.
  • the meshing reaction acting on said area of engagement causes the jack cylinder 5 to automatically swing to its inclined stored position, as in the case of the preceding embodiment.
  • the pusher pin 39 is disengaged from the stepped hole 70 of the rack 16, so that the engaging body 74 fits in the keyhole-like notch 60a of the rack fitting frame 60, thereby integrally interconnecting the rack 16 and jack cylinder 5.
  • the meshing reaction between the rack 16 and the pinion 47 causes the jack cylinder 5 to swing to its vertical position in the initial stage of extension.
  • the pusher pin 39 pushes the engaging body 74 into the stepped hole 70 to thereby cancel the connection between the rack 16 and the rack fitting frame 60, and concurrently therewith the rack retaining pins 30 fit in.the grooves 75 of the rack 16. If, therefore, the jack cylinder 5 is subsequently extended, the rack fitting frame 60 is disengaged from the rack 16; thus, the jack cylinder 5 extends while leaving the rack 16 behind.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
EP82304328A 1981-08-18 1982-08-17 Abstützvorrichtung für fahrbare Arbeitsmaschinen Withdrawn EP0072697A1 (de)

Applications Claiming Priority (13)

Application Number Priority Date Filing Date Title
JP13001981A JPS5849544A (ja) 1981-08-18 1981-08-18 ホイ−ル式作業機械のアウトリガ装置
JP13001881A JPS5849543A (ja) 1981-08-18 1981-08-18 ホイ−ル式作業機械のアウトリガ装置
JP130016/81 1981-08-18
JP13001781A JPS5849542A (ja) 1981-08-18 1981-08-18 ホイ−ル式作業機械のアウトリガ装置
JP13001681A JPS5843848A (ja) 1981-08-18 1981-08-18 ホイ−ル式作業機械のアウトリガ装置
JP16111981A JPS5863556A (ja) 1981-10-09 1981-10-09 ホイ−ル式作業機械のアウトリガ装置
JP161119/81 1981-10-09
JP2792482A JPS58145554A (ja) 1982-02-22 1982-02-22 ホイ−ル式作業機械のアウトリガ装置
JP27924/82 1982-02-22
JP2792282A JPS58145552A (ja) 1982-02-22 1982-02-22 ホイ−ル式作業機械のアウトリガ装置
JP2792382A JPS58145553A (ja) 1982-02-22 1982-02-22 ホイ−ル式作業機械のアウトリガ装置
JP10010882A JPS58218457A (ja) 1982-06-10 1982-06-10 ホイ−ル式作業機械のアウトリガ装置
JP100108/82 1982-06-10

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EP0072697A1 true EP0072697A1 (de) 1983-02-23

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WO2006087068A1 (de) * 2005-02-17 2006-08-24 Putzmeister Aktiengesellschaft Stützausleger für fahrbahre arbeitsmaschinen
DE102014009842B4 (de) * 2013-07-02 2019-05-23 Terex Global Gmbh Vorrichtung und Verfahren für die Montage von Abstütztellern an Fahrzeugen zur Bodenabstützung
WO2019158188A1 (en) * 2018-02-13 2019-08-22 Volvo Construction Equipment Ab A surface support assembly for supporting a working machine

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WO2006087068A1 (de) * 2005-02-17 2006-08-24 Putzmeister Aktiengesellschaft Stützausleger für fahrbahre arbeitsmaschinen
US7552828B2 (en) 2005-02-17 2009-06-30 Putzmeister Concrete Pumps Gmbh Supporting bracket for mobile machine tools
DE102014009842B4 (de) * 2013-07-02 2019-05-23 Terex Global Gmbh Vorrichtung und Verfahren für die Montage von Abstütztellern an Fahrzeugen zur Bodenabstützung
WO2019158188A1 (en) * 2018-02-13 2019-08-22 Volvo Construction Equipment Ab A surface support assembly for supporting a working machine
CN111684135A (zh) * 2018-02-13 2020-09-18 沃尔沃建筑设备公司 用于支撑作业机械的表面支撑组件
CN111684135B (zh) * 2018-02-13 2022-06-03 沃尔沃建筑设备公司 用于支撑作业机械的表面支撑组件
US11401687B2 (en) * 2018-02-13 2022-08-02 Volvo Construction Equipment Ab Surface support assembly for supporting a working machine

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