JP2012116604A - Jack-up device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jack-up device which can store a jack cylinder capable of sufficiently securing the height of an upper turning body during assembling/disassembling work of the upper turning body within the vertical height of the upper turning body.SOLUTION: The jack-up device includes: the jack cylinder 2 which elevates and lowers the body frame of a working machine; a link mechanism 3 which moves the jack cylinder 2 between a work position and a storage position; and a driving cylinder 4 which drives the link mechanism 3 and moves the jack cylinder 2 between the work position and the storage position. The jack cylinder 2 takes such a working attitude that the axial direction of the jack cylinder is extended in the perpendicular direction at a position separated from the lateral surface of the body frame in the width direction of the working machine at the operation position, and takes such a storage attitude that the axial direction of the jack cylinder is inclined along the lateral surface of the body frame at the storage position, and the link mechanism 3 is configured so as to link and move the jack cylinder 2 in a horizontal surface and in a perpendicular surface.

Description

  The present invention relates to a jack-up device that jacks up an airframe during crane disassembly and assembly work.

  Generally, a mobile large crane disassembles and transports an upper revolving unit from a lower traveling unit in order to reduce the transport weight, and a device that jacks up the upper revolving unit to perform disassembly and assembly work during this transportation Is known (for example, Patent Document 1). The apparatus described in Patent Document 1 moves the jack cylinder to a working position separated from the body frame by an extension operation of the jack cylinder, and moves the jack cylinder to a storage position close to the body frame by a contraction operation of the jack cylinder. Drive the link mechanism.

JP 2010-155661 A

  The jack-up device described in Patent Document 1 is configured so that the jack cylinder extends in the vertical direction by sliding the jack cylinder extending in the vertical direction in the left-right direction so that the jack cylinder is separated from the body frame. In the state, it is stored on the side of the upper swing body. The jack-up device described in Patent Document 1 has a problem that the length of the jack cylinder cannot be increased too much because the jack cylinder needs to be stored within the vertical height of the upper swing body.

  The present invention relates to a jack cylinder that raises and lowers a machine body frame of a work machine, a link mechanism that moves the jack cylinder between a work position and a storage position, and drives the link mechanism to move the jack cylinder between the work position and the storage position. The jack cylinder is in a working position in which the axial direction extends in the vertical direction at a position away from the side surface of the machine body frame in the width direction of the work machine. Then, the axial direction of the storage frame is inclined along the side surface of the fuselage frame, and the link mechanism is configured to move the jack cylinder in conjunction with each other in a horizontal plane and a vertical plane. It is a jack-up device.

  According to the present invention, there is provided a jack-up device capable of storing a jack cylinder capable of sufficiently ensuring the height of an upper swing body during disassembly and assembly work of the upper swing body within the vertical height of the upper swing body. be able to.

It is a side view of a crawler crane carrying a jackup device concerning an embodiment of the invention. It is a figure which shows the disassembly / assembly work attitude | position of an upper revolving body. It is a figure which shows the state by which the upper revolving body was mounted in the trailer for conveyance. It is a perspective view which shows operation | movement of the jackup apparatus which concerns on embodiment of this invention. 1 is an external perspective view of a jackup device according to an embodiment of the present invention. It is a side view which shows operation | movement of the 1st link mechanism of the jackup apparatus which concerns on embodiment of this invention. It is a plane schematic diagram which shows operation | movement of the 2nd link mechanism of the jackup apparatus which concerns on embodiment of this invention. It is a side view which shows the operation | movement by which the jackup apparatus which concerns on embodiment of this invention is fixed. It is an external appearance perspective view which shows the state by which the jackup apparatus which concerns on embodiment of this invention was fixed.

Embodiments of a jack-up device according to the present invention will be described below with reference to the drawings.
FIG. 1 is a side view of a crawler crane 100 equipped with a jackup device according to the present invention. The crawler crane 100 includes a lower traveling body 120, an upper revolving body 110 that is turnably mounted above the lower traveling body 120 via a swivel wheel, and a boom 130 that is pivotally supported on the upper revolving body 110 so as to be able to undulate. It has.

  The crawler crane 100 is disassembled into the upper swing body 110 and the lower traveling body 120 using a jack-up device in order to reduce the transport weight. The disassembled upper swing body 110 and lower traveling body 120 are each transported to the work site by a transport trailer.

  FIGS. 2A and 2B are an external perspective view and a side view showing a state in which the body frame 11 of the upper swing body 110 is jacked up by the jackup device 1. As shown in the figure, when the body frame 11 of the upper swing body 110 and the lower frame 12 of the lower traveling body 120 are disassembled and assembled, the body frame 11 is jacked up to a predetermined height by the jack-up device 1.

  FIG. 3A and FIG. 3B are an external perspective view and a side view showing a state in which the body frame 11 of the upper swing body 110 is placed on a transport trailer. As illustrated, the upper swing body 110 is transported by a transport trailer. At the time of transport, the jack cylinder 2 is stored in a state of being close to the left and right side surfaces of the body frame 11 of the upper swing body 110 so as to be within the transport width. At this time, the jack cylinder 2 is held in a tilted state.

  The jack-up device 1 moves between a storage position shown in FIG. 4A and a work position shown in FIG. 4C by a link mechanism 3 that operates by extending and contracting the drive cylinder 4. That is, the link mechanism 3 can move the jack cylinder 2 in the storage position to a work position separated from the body frame 11. Furthermore, the jack cylinder 2 in the working position can be moved to the storage position close to the body frame 11. In the retracted position, the jack cylinder 2 is held in a tilted retracted position, and in the working position, the jack cylinder 2 is held in a vertical working position. Specifically, the jack cylinder 2 takes a retracted posture in which the axial direction is inclined along the side surface of the machine body frame 11 at the storage position, and the axial direction of the jack cylinder 2 extends from the side surface of the machine body frame 11 at the work position. The working posture extends in the vertical direction at a position separated in the width direction. Hereinafter, the configuration of the jackup device 1 will be described in detail.

(Overall configuration of jack-up device)
As shown in FIG. 4A, a jackup device 1 according to an embodiment of the present invention includes a beam 9 for attaching the jackup device 1 to a body frame 11, and a jack cylinder for jacking up and down the body frame 11. 2, a link mechanism 3 that moves the jack cylinder 2 between the retracted position and the working position, a drive cylinder 4 that drives the link mechanism 3, and a fixing mechanism that fixes the jack cylinder 2 in the working position at the working position. I have. The beam 9 is attached to the body frame 11 so as to be rotatable in a horizontal plane. The jack cylinder 2 is attached to the beam 9 so as to be rotatable in a vertical plane.

(beam)
The mounting portion 15 of the body frame 11 is provided with a rotating shaft 16 extending in the vertical direction, and flat upper bearing plates 17a and lower bearing plates 17b that support both upper and lower ends of the rotating shaft 16. . The beam 9 includes a flat upper plate 95a and lower plate 95b, and a pair of side plates 90. The upper surface plate 95a and the lower surface plate 95b are pivotally attached to the rotation shaft 16, and the beam 9 is rotatable in the horizontal direction around the rotation shaft 16. When the jack-up operation is not performed, the beam 9 and the jack cylinder 2 attached to the beam 9 are held by the lower bearing plate 17b.

  In the vicinity of the upper ends of the pair of side plates 90 in the beam 9, a long hole 91 having a vertical direction as a longitudinal direction is formed. A rotation shaft 29 of the jack cylinder 2 described later is inserted into the long hole 91. A shaft 93 is disposed at the center of the side plate 90 so as to penetrate the pair of side plates 90.

  A cutout portion 96 cut in the vertical direction is provided at the lower end portion of the side plate 90, and in the vicinity of the end surface on the jack cylinder 2 side above the cutout portion 96, the body frame is mounted by the jack cylinder 2 at the working position. A hook-shaped hooking portion 92 for supporting 11 is formed.

(Jack cylinder)
The jack cylinder 2 is a hydraulic cylinder for raising and lowering the machine body frame 11 of the work machine. As shown in FIGS. 4 and 5, the jack cylinder 2 is provided with a pair of ribs 20 extending in the longitudinal direction.

  A rotation shaft 29 extending in the horizontal direction is provided in the vicinity of the upper end of the rib 20. The rotating shaft 29 is inserted so as to penetrate the pair of ribs 20, and both end portions projecting outward from the ribs 20 are supported by the long holes 91 of the side plate 90 of the beam 9 described above ( (See FIG. 4). That is, the jack cylinder 2 can be rotated in the vertical plane with the rotation shaft 29 as the rotation center.

  As shown in FIG. 5, a receiving shaft 22 extending in the horizontal direction is provided in the center portion in the longitudinal direction of the rib 20 of the jack cylinder 2. The receiving shaft 22 is inserted so as to penetrate the pair of ribs 20, and both end portions protrude outward of the ribs 20. A shaft 24 extending in the horizontal direction is provided in the vicinity of the lower end of the rib 20. The shaft 24 is inserted so as to penetrate the pair of ribs 20, and both end portions protrude outward of the ribs 20.

(Drive cylinder)
The drive cylinder 4 is a hydraulic cylinder for driving the link mechanism 3 to move the jack cylinder 2 between the storage position and the work position. As shown in FIG. 5, the drive cylinder 4 is a shaft in which the piston rod at the tip is connected to a shaft 24 provided near the lower end of the rib 20 of the jack cylinder 2 and the cylinder base is disposed on the beam 9. 93. Therefore, when the drive cylinder 4 is expanded and contracted, the jack cylinder 2 rotates about the rotation shaft 29 as a rotation center.

(Link mechanism)
The link mechanism 3 includes a first link mechanism 31 and a second link mechanism 32, and is configured to move the jack cylinder 2 in conjunction with each other in a horizontal plane and a vertical plane. It functions as an interlocking mechanism that rotates the beam 9 in a horizontal plane in conjunction with the jack cylinder 2 that rotates inside.
(First link mechanism)
The first link mechanism 31 is a mechanism that operates by rotating the jack cylinder 2 in the vertical plane, and includes a plurality of vertical operation members that operate in the vertical plane, and is driven by the drive cylinder 4. The As shown in FIG. 5 and FIG. 6A, the plurality of vertical motion members are composed of an upper link 312 made of a long plate and a lower side made of two plates arranged so as to sandwich the upper link 312. Link 311 is included. The upper link 312 and the lower link 311 are connected to each other by a shaft 312a so as to be rotatable.

  A long hole 311 a is formed at one end of the lower link 311, and a shaft 24 provided near the lower end of the rib 20 of the jack cylinder 2 is inserted into the long hole 311 a. The upper link 312 is rotatably connected to a shaft 93 disposed on the beam 9.

(Second link mechanism)
The second link mechanism 32 is a mechanism for rotating the beam 9 with respect to the body frame 11 around the rotation axis 16 in the horizontal plane, and includes a plurality of horizontal operation members that operate in the horizontal plane, It is configured to include a motion conversion member that receives a motion in the vertical plane of one link mechanism 31 and operates a horizontal motion member in a horizontal plane, and is driven in conjunction with the first link mechanism 31. As shown in FIG. 5, the second link mechanism 32 includes a slide link 321 as a motion conversion member, and a slide member 322 and a horizontal link 323 as horizontal motion members. The slide link 321 is composed of two plates arranged so as to sandwich the upper link 312 of the first link mechanism 31. One end of the slide link 321 is rotatably connected to the vicinity of the upper end portion of the upper link 312 of the first link mechanism 31. The other end of the slide link 321 is rotatably connected to the slide member 322.

  The slide member 322 is inserted into a guide bar 94 disposed so as to extend in the horizontal direction in the beam 9, and is slidable in the horizontal direction along the guide bar 94. As described above, the slide link 321 is connected to the slide member 322. Therefore, when the upper link 312 of the first link mechanism 31 rotates, the slide link 321 operates in conjunction with the first link mechanism 31, so that the slide member 322 moves along the guide bar 94.

  One end of the horizontal link 323 is attached to the shaft 322 a of the slide member 322, and the other end is attached to the shaft 99 of the attachment portion 15 of the body frame 11. Since the both ends of the horizontal link 323 are rotatably connected by shafts 99 and 322a extending in the vertical direction, the horizontal link 323 moves in the horizontal plane around the shaft 99 in conjunction with the movement of the slide member 322. Since the shaft 99 is connected to the mounting portion 15 of the body frame 11, the beam 9 relatively moves around the rotation shaft 16.

(Fixing mechanism)
The fixing mechanism is a link mechanism that fixes the beam 9 so that the beam 9 does not rotate in the horizontal direction with respect to the body frame 11 when the jack cylinder 2 is in the working position. As shown in FIGS. 5, 8, and 9, the fixing mechanism includes a fixed link 51 made of a long plate and a fixing member 53 including a fixing pin 532 driven by the fixed link 51. .

  The fixed link 51 is pivotally attached to a shaft 512 disposed in a horizontal direction so as to be orthogonal to the side plate 90 of the beam 9. A long hole 51a is formed at one end of the fixed link 51, and the rotation shaft 29 is inserted into the long hole 51a. That is, one end of the fixed link 51 is connected to the rotation shaft 29 disposed in the vicinity of the upper end portion of the rib 20 of the jack cylinder 2.

  An elongated hole 521a extending substantially in the horizontal direction is formed in the bent portion 521 at the other end of the fixed link 51. The shaft 531 of the fixing member 53 is inserted into the long hole 521a, and the fixing member 53 moves up and down in the vertical direction by the swinging motion of the fixing link 51.

  The fixing member 53 includes a fixing pin 532 and a shaft 531 that extends in the horizontal direction at the upper end of the fixing pin 532. The shaft 531 of the fixing member 53 is also inserted into a long hole 591 a provided in the guide member 59 fixed to the mounting portion 15 of the body frame 11. A flange 592 is provided at the lower end portion of the guide member 59, and the guide member 59 is fixed to the attachment portion 15 by fastening the flange 592 to the attachment portion 15 with a bolt.

  Next, main operations of the jackup device 1 according to the present embodiment will be described. FIG. 6A shows a state in which the jack-up device 1 is held at the retracted position close to the body frame 11. At this time, the jack cylinder 2 is held in a tilted state and is stored in the vertical height of the upper swing body 110 (see FIG. 3).

(Exit action)
The swinging operation of the jack cylinder 2 will be described. When the jack cylinder 2 held at the retracted position is moved to the working position, the jack cylinder 2 at the retracted position is operated by operating a drive cylinder switch (not shown) to drive the drive cylinder 4 to contract. Move towards position.

  When the drive cylinder 4 is driven to contract, the jack cylinder 2 rotates clockwise about the rotation shaft 29 as a swing fulcrum. By this rotation, the jack cylinder 2 is rotated toward the vertical posture shown in FIG. 6C through the intermediate posture of FIG. As the jack cylinder 2 swings, the lower link 311 drives the upper link 312 and the upper link 312 rotates in the clockwise direction around the shaft 93 as a swing fulcrum. The second link mechanism 32 is driven by the swinging motion of the upper link 312.

  In conjunction with such a swinging motion of the jack cylinder 2, the entire beam 9 rotates in the horizontal direction about the rotation shaft 16. The horizontal operation of the jack cylinder 2 will be described with reference to FIGS. FIG. 7 is a schematic plan view showing the operation of the second link mechanism 32.

  As shown in FIGS. 6A to 6C, when the first link mechanism 31 is operated so as to be folded, the vicinity of the upper end portion of the upper link 312 moves in a direction approaching the jack cylinder 2. The slide link 321 of the second link mechanism 32 moves so as to be drawn toward the jack cylinder 2 side.

  When the slide link 321 moves to the jack cylinder 2 side, as shown in FIGS. 6B, 6C, and 7B, the slide member 322 pivotally attached to the tip of the slide link 321 is It slides and moves toward the jack cylinder 2 along the guide bar 94. That is, the slide link 321 as the motion conversion member receives the operation of the first link mechanism 31 and moves the slide member 322 along the guide bar 94.

  When the slide member 322 moves toward the jack cylinder 2 along the guide bar 94, the shaft 322a also moves in a direction parallel to the guide bar 94. In accordance with the amount of movement of the shaft 322a, the horizontal link 323 pivots in the clockwise direction around the shaft 99, and the guide bar 94 pivots in the clockwise direction around the rotation shaft 16. That is, since the shaft 99 is installed immovably with respect to the body frame 11, the shaft 9 is driven in the direction in which the beam 9 opens with respect to the mounting portion 15, that is, the jack-up device 1 is directed toward the working position.

  Thus, when the drive cylinder 4 is driven to contract, as shown in FIGS. 4A to 4C, the jack cylinder 2 swings so as to have a vertical posture at the working position. Further, the beam 9 rotates in the horizontal direction toward the working position. In this way, the jack cylinder 2 moves to a work position separated from the body frame 11, and shifts from a tilted posture during storage to a vertical posture during use.

(Fixed operation)
Next, with reference to FIG. 8 and FIG. 9, the operation | movement for fixing the jack cylinder 2 in a working position is demonstrated. As shown in FIG. 8A, the drive cylinder 4 is further contracted after being swung out to the working position. When the drive cylinder 4 is driven to contract, the shaft 24 of the jack cylinder 2 connected to the drive cylinder 4 is lifted along the long hole 311a of the lower link 311 as shown in FIGS. Therefore, the jack cylinder 2 moves upward.

  When the jack cylinder 2 is raised, the rotation shaft 29 moves upward along the long hole 91 provided in the side plate 90 of the beam 9 and comes into contact with the upper surface of the long hole 91. Similarly, the receiving shaft 22 also rises and comes into contact with the hooking portion 92 of the beam 9. At this time, the shaft 24 is disposed at a position close to the notch 96. The shaft 24 can be engaged with the inner side surface of the notch 96, and fixes the jack cylinder 2 so that the jack cylinder 2 does not rotate in the vertical plane with respect to the beam 9. That is, vertical rotation about the rotation axis 29 of the jack cylinder 2 is prohibited.

  Further, since the rotation shaft 29 moves upward along the long hole 91, the fixed link 51 having one end connected to the rotation shaft 29 rotates about the shaft 512. When the fixed link 51 rotates about the shaft 512, the bent portion 521 formed at the other end of the fixed link 51 moves downward. Thereby, the shaft 531 of the fixing member 53 moves along the long hole 591a of the guide member 59, and the fixing member 53 descends.

  When the fixing member 53 is lowered, the fixing pin 532 is fitted into the through hole provided in the lower bearing plate 17b of the mounting portion 15 of the body frame 11, and the beam 9 rotates in the horizontal plane with respect to the body frame 11. Not to be fixed. That is, horizontal movement around the rotation axis 16 of the beam 9 is prohibited.

  When a jack switch (not shown) is operated in this state, the jack cylinder 2 is extended and the upper swing body 110 is jacked up (see FIG. 2). At this time, the body frame 11 of the upper swing body 110 is supported by the jackup device 1.

  Specifically, as shown in FIG. 8B, the rotation shaft 29 of the jack cylinder 2 supports the upper end surface of the long hole 91 of the beam 9, and the receiving shaft 22 provided on the rib 20 of the jack cylinder 2 is provided. The hooking portion 92 of the beam 9 is supported. Further, the upper surface plate 95 a of the beam 9 supports the upper bearing plate 17 a of the mounting portion 15.

(Unlock operation)
The fixing release operation for the attachment portion 15 of the jackup device 1 will be described. Prior to the unlocking operation, the jack cylinder 2 is contracted and the body frame 11 is jacked down. The contraction drive of the jack cylinder 2 is completed by the jack down operation (see FIG. 8B), and the drive cylinder 4 is extended and driven in the working posture of the jack cylinder 2 to start the unlocking operation.

  When the drive cylinder 4 is driven to extend, the jack cylinder 2 descends as shown in FIG. 8A, so that the notch 96 and the shaft 24 of the jack cylinder 2 are separated from each other. The restriction on the rotation about the moving shaft 29 is released. Further, the fixing mechanism operates, that is, the fixing link 51 swings clockwise around the shaft 512, and the fixing pin 532 of the fixing member 53 is disengaged from the through hole of the lower bearing plate 17b, and the beam The restriction on the horizontal movement around the nine rotation shafts 16 is released.

(Storing operation)
Further, when the drive cylinder 4 is driven to extend, the link mechanism 3 operates in the opposite direction to the above-described swinging operation. Therefore, the working posture of FIG. 4C is changed to the intermediate posture shown in FIG. ) Move toward the retracted position. As shown in the intermediate posture of FIG. 4B, the beam 9 rotates horizontally around the rotation shaft 16 in the direction in which the jack cylinder 2 approaches the body frame 11, and the jack cylinder 2 rotates the rotation shaft. It gradually swings around 29 in the counterclockwise direction. When the drive cylinder 4 is fully extended, the jack cylinder 2 is disposed at the retracted position close to the body frame 11 as shown in FIG. The stored jack cylinder 2 is held in a tilted state.

According to this Embodiment described above, there can exist the following effects.
(1) The jack cylinder 2 is moved to a work position separated from the body frame 11, the jack cylinder 2 is held in a vertical state during work, and the jack cylinder 2 is moved to a storage position close to the body frame 11 for storage. In some cases, the jack cylinder 2 is held in a tilted state. Thereby, since the length of the jack cylinder 2 in the non-use state (the state in which the contraction drive of the jack cylinder 2 is completed) can be made longer than the height dimension of the upper swing body 110, the upper swing body 110 is disassembled. It is possible to provide the jack-up device 1 that can store the jack cylinder 2 capable of sufficiently ensuring the height of the upper swing body 110 during the assembly operation in the upper swing body 110.
(2) At the working position of the jack cylinder 2, the beam 9 is fixed so that the beam 9 does not rotate about the rotation axis 16 with respect to the body frame 11, and the jack cylinder 2 rotates relative to the beam 9. The jack cylinder 2 is fixed so as not to rotate about the center 29. As a result, the jackup device 1 can be securely fixed at the work position to perform jackup and jackdown operations.

The above-described embodiment can be modified as follows.
[Modification]
(1) The receiving shaft 22 may be omitted. In this case, the beam 9 is supported by the rotating shaft 29 when jacking up.
(2) A mechanism for rotating the beam 9 around the rotation axis 16 with respect to the body frame 11, that is, a moving mechanism between the work position and the storage position of the jack-up device 1, and the jack cylinder 2 However, the mechanism for tilting around the rotation axis 29, that is, the moving mechanism between the working posture and the retracted posture of the jack cylinder 2 is not limited to the above-described embodiment.

  The present invention is not limited to the embodiment described above, and can be freely changed and improved without departing from the gist of the invention.

DESCRIPTION OF SYMBOLS 1 Jack up apparatus, 2 Jack cylinder, 3 Link mechanism, 4 Drive cylinder, 9 beam, 11 Airframe frame, 15 Mounting part, 16 Rotating shaft, 20 Rib, 22 Receiving shaft, 24 shaft, 29 Rotating shaft, 31 1st One link mechanism, 32 Second link mechanism, 51 Fixed link, 53 Fixed member, 59 Guide member, 90 Side plate, 92 Hook, 94 Guide bar, 100 Crawler crane, 321 Slide link, 322 Slide member, 323 Horizontal Link, 532 fixing pin

Claims (5)

A jack cylinder that raises and lowers the machine frame of the work machine;
A link mechanism for moving the jack cylinder between a working position and a storage position;
A drive cylinder that drives the link mechanism to move the jack cylinder between the working position and the storage position;
The jack cylinder has a working posture in which the axial direction extends in the vertical direction at a position away from the side surface of the machine body frame in the width direction of the work machine at the working position, and the axial direction at the retracted position. Takes a retracted posture that tilts along the side of the fuselage frame,
The said link mechanism is comprised so that the said jack cylinder may be moved interlockingly within a horizontal surface and a vertical surface, The jackup apparatus characterized by the above-mentioned. The jackup device according to claim 1, wherein
A beam attached to the body frame so as to be rotatable in a horizontal plane,
The jack cylinder is attached to the beam so as to be rotatable in a vertical plane, and is rotated by an expansion / contraction operation of the drive cylinder,
The link mechanism rotates in the horizontal plane with respect to the body frame in conjunction with the first link mechanism that operates by rotating in the vertical plane of the jack cylinder and the first link mechanism. And a second link mechanism. The jack-up device according to claim 2,
The first link mechanism includes a plurality of vertical motion members that operate in a vertical plane,
The second link mechanism includes a plurality of horizontal operation members that operate in a horizontal plane, and an operation conversion member that receives the operation in the vertical plane of the first link mechanism and operates the horizontal operation member in a horizontal plane. And a jack-up device. The jack-up device according to claim 3,
The beam is provided with a guide bar extending in the horizontal direction,
The plurality of horizontal operation members include a slide member that moves along the guide bar, and a horizontal link that is rotatably connected to each of the slide member and the body frame,
The motion conversion member is rotatably connected to each of the first link mechanism and the slide member, and receives the operation of the first link mechanism to move the slide member along the guide bar. A jack-up device characterized by this. The jack-up device according to any one of claims 2 to 4,
A first fixing means and a second fixing means, which are driven by the drive cylinder and fix the jack cylinder in the working position;
The first fixing means fixes the beam so that the beam does not rotate in a horizontal plane with respect to the body frame,
The jack-up device, wherein the second fixing means fixes the jack cylinder so that the jack cylinder does not rotate in a vertical plane with respect to the beam.

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