JP2015174730A - Jack up device and jack up method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jack up device which achieves improvement in earthquake resistance when bringing up a heavy object and cost reduction of the work.SOLUTION: A jack up device includes: a first frame 2 attached to a foundation part; a second frame 3 which may displace relative to the first frame 2 in a vertical direction and is attached to a jack up object; and multiple first jacks 11 and multiple second jacks 12 which are provided between the first frame 2 and the second frame 3. The multiple first jacks 11 are provided between a first placement part 24 provided at the first frame 2 and a first receiving part 311 provided at a position above the first placement part 24 in the second frame 3. The multiple second jacks 12 are provided between a second placement part 331 provided at the second frame 3 and a second receiving part 25 provided at a position higher than the second placement part 331 in the first frame 2.

Description

  The present invention relates to a jackup device and a jackup method. In particular, the present invention relates to a jackup device used for jacking up heavy objects such as an unloader for a quayside facility, and a jackup method using the jackup device.

  The unloader of the quay equipment has a configuration in which an upper swing body is rotatably provided on the upper side of the gantry. A swing bearing is provided between the gantry and the upper swing body. The exchange of the slewing bearing is generally performed by lifting the upper slewing body using a crane.

  By the way, in recent years, there is an increasing demand for maintaining earthquake resistance even during the exchange work of such slewing bearings. However, in the conventional method using a crane, it is necessary to keep the upper swing body in a lifted state from the removal of the old swing bearing to the installation of the new swing bearing. For this reason, there is a problem that the earthquake resistance is low while the upper-part turning body is lifted by the crane. In addition, when the work site is not suitable for crane work, it is necessary to increase the lifting capacity of the crane. If it does so, a large crane will be needed, which causes an increase in work costs. Furthermore, depending on the situation at the work site, a large crane may not be installed.

  Patent Document 1 discloses a configuration in which a heavy object is jacked up while maintaining earthquake resistance without using a crane. However, in the configuration described in Patent Document 1, the structure of the slide portion is large, and accuracy is required. For this reason, it is considered difficult to reduce the work cost. Furthermore, the jack-up target is limited to a structure having a pile. For this reason, it is considered that it cannot be applied to jack-up of unloaders and the like of gulf facilities.

JP 09-328760 A

  In view of the above situation, the problem to be solved by the present invention is to lift a heavy object such as an upper revolving part of an unloader without using a large crane and while lifting and maintaining the lifted state. To provide a jack-up device and a jack-up method capable of ensuring earthquake resistance and performing work at low cost.

  In order to solve the above-mentioned problems, the present invention provides a first frame attached to a base on which a jack-up target is placed, and is displaceable in the vertical direction with respect to the first frame. A second frame to be attached; a plurality of first jacks and a plurality of second jacks provided between the first frame and the second frame; A plurality of second jacks provided between a first placement portion provided on the frame and a first receiving portion provided on the second frame and positioned above the first placement portion; It is provided between the 2nd mounting part provided in a 2nd frame, and the 2nd receiving part provided in the said 1st frame and located above the said 2nd mounting part, It is characterized by the above-mentioned.

  The first frame has a guide portion that is provided above the first placement portion and surrounds the outside of the second frame in a top view, and the second receiving portion is provided on the guide portion. it can.

  The second frame is provided with a plurality of rod-like members that stand vertically and whose upper ends are joined to the jack-up object, a frame that supports the plurality of rod-like members, and a lower portion of the frame. And a plurality of rod-shaped members extending in the horizontal direction, and the second mounting portion may be provided on the plurality of rod-shaped members extending in the horizontal direction.

  The first frame and the second frame are each formed in a polygonal shape in a top view, and the plurality of first jacks and the plurality of second jacks are close to each other in the vicinity of each corner of the polygonal shape. The structure provided by applying can be applied.

  The present invention is a jack-up method using the jack-up device, wherein the plurality of first jacks are stretched to jack up a jack-up target and when the plurality of first jacks are stretched, A state in which a gap is formed between the plurality of second jacks and the second receiving portion is maintained by shrinking the plurality of second jacks.

  The first frame and the second frame are each divided into a plurality, and when the second frame is attached to the jack-up object, the second frame is joined together, and the first frame is When the jack-up object is attached to the base portion on which the jack-up target is placed, a configuration in which the first frame is integrally joined can be applied.

  According to the present invention, when maintaining a state in which a heavy object is lifted, it is possible to ensure earthquake resistance during jack-up work and while maintaining the jack-up state without using a large crane, and inexpensively. Work can be done.

FIG. 1 is an external perspective view schematically showing a configuration example of a jackup device. 2 is a cross-sectional view schematically showing a configuration example of the jack-up device, and is a cross-sectional view taken along the line II-II in FIG. FIG. 3A is an external perspective view schematically showing a configuration example of the first frame, and FIG. 3B is a top view schematically showing a configuration example of the first frame. FIG. 4A is an external perspective view showing the configuration example of the second frame as seen from above, and FIG. 4B is an external perspective view showing the configuration example of the second frame as seen from below. FIG. 5 is a cross-sectional view schematically showing a configuration example in the vicinity of the first jack and the second jack. FIG. 6 is an exploded perspective view schematically showing the assembly configuration of the jack-up device. FIG. 7 is a partial cross-sectional view schematically showing a configuration example in the vicinity of the first jack and the second jack.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the embodiment of the present invention, as an object to be jacked up, an upper turning body 92 (see FIG. 6) of the unloader 9 of the quay equipment is shown as an example. However, the object to be jacked up is not limited to the upper swing body 92 of the unloader 9. The present invention can be applied without limiting the object as long as it is jacking up heavy objects.

<Configuration of jack-up device>
First, the structural example of the jackup apparatus 1 which concerns on embodiment of this invention is demonstrated with reference to FIGS. FIG. 1 is an external perspective view schematically showing an example of the overall configuration of the jackup device 1. FIG. 2 is a cross-sectional view schematically showing a configuration example of the jackup device 1, and is a cross-sectional view taken along the line II-II in FIG. FIG. 3A is an external perspective view schematically showing a configuration example of the first frame 2 of the jackup device 1. FIG. 3B is a top view schematically showing a configuration example of the first frame 2 of the jackup device 1. 4A and 4B are external perspective views schematically showing a configuration example of the second frame 3 of the jack-up device 1. FIG. 4A is a view seen from above, and FIG. 4B is a view seen from below.

  As shown in FIGS. 1 to 4, the jackup device 1 includes a first frame 2, a second frame 3, a plurality of jackup first jacks 11 (four in the embodiment of the present invention), And a plurality of (four in the embodiment of the present invention) second jacks 12 for preventing overturning. The first frame 2 is used by being attached to a gantry 91 of the unloader 9 (a base part, that is, a structure on the ground side where a jack-up object is installed, see FIG. 6). The second frame 3 is used by being attached to an upper swing body 92 (an object to be jacked up, see FIG. 6) of the unloader 9. The first frame 2 and the second frame 3 are formed separately, and can be displaced relatively in a slidable manner in the vertical direction (jack-up / jack-down direction). Each of the first frame 2 and the second frame 3 includes a combination structure of a plurality of rod-shaped members. For convenience of explanation, a rod-like member provided so as to extend in the horizontal direction is referred to as a “cross member” for each member constituting the first frame 2 and the second frame 3, and a rod-like member provided so as to stand upright in the vertical direction. This member is called “longitudinal material”.

  The first frame 2 has a structure formed by combining a plurality of vertical members and cross members, and has a generally rectangular parallelepiped bowl-like configuration as a whole. The plurality of longitudinal members and the transverse members are joined together by welding or screwing, for example. The first frame 2 is provided with a guide portion 21 that guides the second frame 3 and a lower frame portion 22 that supports the guide portion 21 and the first jack 11.

  The guide portion 21 is formed in a rectangular frame shape when viewed from above. It may be a polygonal shape other than a quadrangle. And the guide part 21 guides the 2nd flame | frame 3 so that it may not position-shift and incline by enclosing the outer side of the 2nd flame | frame 3. FIG. For example, square steel (square steel pipe) is applied to the four cross members forming the guide portion 21. Of the four cross members that form the guide portion 21, two cross members parallel to each other (hereinafter referred to as "first cross member 211") have lower ends near both ends on the upper end of the second jack 12. The 2nd receiving part 25 with which a part contact | abuts is provided. A receiving plate 251 made of, for example, a steel plate having a required thickness is joined to the second receiving portion 25. The first cross member 211 is formed of a single bar-like member over the entire length. On the other hand, the remaining two cross members (hereinafter referred to as “second cross members 212”) are each joined by abutting two rod-like members in the length direction.

  Similarly to the guide part 21, the lower frame part 22 is also formed in a rectangular frame shape in a top view. A plurality of (four in the embodiment of the present invention) vertical members (hereinafter referred to as “first vertical members 23”) projecting upward at the four corners (polygonal corners) of the lower frame portion 22. Is provided. And the guide part 21 is joined to the upper end part of these four 1st vertical members 23. FIG.

  Of the four cross members forming the lower frame portion 22, two cross members parallel to each other and parallel to the first cross member 211 (hereinafter referred to as "third cross member 221") In the vicinity of both end portions, a first placement portion 24 for placing the first jack 11 is provided (see FIGS. 2 and 3). For example, H-shaped steel or I-shaped steel is applied to the third cross member 221. The third cross member 221 is formed of a single bar-like member over the entire length. The remaining two cross members, which are parallel to the second cross member 212 (hereinafter referred to as “fourth cross member 222”), have two rod-shaped members abutting each other in the length direction. It is joined. For the fourth cross member 222, for example, square steel (square steel pipe) is applied. For example, square steel (square steel pipe) is also applied to the four first vertical members 23 provided at the four corners of the lower frame portion 22.

  A first placement portion 24 on which the first jack 11 is placed is provided on the upper surface in the vicinity of both end portions of each third transverse member 221 (in other words, in the vicinity of the first longitudinal member 23) (FIG. 2, (See FIG. 3). That is, four first placement portions 24 are provided at four corners of the first frame 2 in total. The first placement portion 24 is provided inside the region surrounded by the guide portion 21 in the top view and in the vicinity of the four corners of the guide portion 21 (see particularly FIG. 3B). For example, the third cross member 221 provided with the first placement portion 24 and the first cross member 211 provided in parallel above the third cross member 221 are provided at positions shifted from each other so as not to overlap each other in a top view.

  The first placement portion 24 is provided with a reinforcing plate 241 made of a steel plate having a required thickness. A reinforcing rib 201 is provided on the side surface of the third cross member 221 and below the first placement portion 24. Furthermore, a support leg 202 that protrudes downward is provided on the lower surface of the third cross member 221 and below the first placement portion 24. In addition, the support leg 202 should just be the structure which can be joined to the mount frame 91 (base part) of the unloader 9, and can support the load at the time of jackup, and a specific structure is not limited.

  As described above, the first frame 2 includes the guide portion 21 and the lower frame portion 22 each formed in a rectangular frame shape in a top view. The longitudinal dimension (the lateral dimension in FIG. 3B) of the first lateral member 211 of the guide part 21 and the longitudinal dimension of the third lateral member 221 of the lower frame part 22 are set to be the same. On the other hand, the longitudinal dimension (the longitudinal dimension in FIG. 3B) of the second transverse member 212 of the guide portion 21 is set to be larger than the longitudinal dimension of the fourth transverse member 222 of the lower frame portion 22. . Therefore, as shown in FIG. 3B in particular, the second cross member 212 of the guide portion 21 and the fourth cross member 222 of the lower frame portion 22 overlap each other in a top view (in FIG. 3B). The fourth cross member 222 is hidden behind the second cross member 212 and cannot be seen). On the other hand, the first cross member 211 and the third cross member 221 are provided at positions shifted from each other in a top view. In particular, the first cross member 211 is provided outside the third cross member 221 of the lower frame portion 22 in a top view.

  The second frame 3 has a structure formed by combining a plurality of vertical members and cross members. In particular, as shown in FIGS. 4A and 4B, the second frame 3 includes four vertical members, a frame body 32, and two cross members provided below the frame body 32. The plurality of longitudinal members and the transverse members are joined together by welding or screwing, for example.

  Four vertical members (hereinafter referred to as “second vertical members 31”) are supported by the first jack 11 from below at their lower ends. For this reason, the 1st receiving part 311 is provided in the lower end part of the four 2nd vertical members 31. As shown in FIG. As the 1st receiving part 311, the steel plate of required thickness is applied, for example. The upper end portion of the second vertical member 31 is joined to the lower surface of the upper swing body 92 (jack-up target) of the unloader 9.

  The frame body 32 has a rectangular frame-like configuration in a top view. The four second vertical members 31 are joined to the four corners (polygonal corners) of the frame 32. In other words, the four second vertical members 31 are integrally connected by the frame body 32. Of the four cross members forming the frame 32, two cross members parallel to each other, which are parallel to the first cross member 211 and the third cross member 221 of the first frame 2 (hereinafter, The “fifth cross member 321”) is formed of a single bar-like member over the entire length. The remaining two cross members, which are parallel to the second cross member 212 and the fourth cross member 222 of the first frame 2 (hereinafter referred to as “six cross members 322”), are each 2 Two rod-like members are butted in the length direction and joined.

  Two cross members (hereinafter referred to as “seventh cross member 33”) are further provided below the frame 32. The seventh cross member 33 is provided at a position shifted from the four second vertical members 31 (a position that does not overlap) when viewed from above. Specifically, the seventh cross member 33 is provided in a position parallel to the sixth cross member 322 and shifted from the sixth cross member 322 to the inside of the frame 32 in a top view. Both end portions of the seventh cross member 33 protrude to the outside of the frame body 32 (outside of the fifth cross member 321) in a top view. Then, both end portions of the seventh cross member 33 are superimposed on the first cross member 211 of the guide portion 21 of the first frame 2 in a top view (see particularly FIG. 2). Both end portions of the seventh cross member 33 serve as a second placement portion 331 on which the second jack 12 is placed.

  For example, square steel (square steel pipe) is applied to the second longitudinal member 31, the fifth transverse member 321 and the sixth transverse member 322. For example, H-shaped steel or I-shaped steel is applied to the seventh cross member 33.

  In the embodiment of the present invention, the first frame 2 and the second frame 3 are configured to have a quadrangular shape when viewed from the top. May be.

  Various known jacks can be applied to the first jack 11 and the second jack 12. For example, a mechanical jack or a single-action cylinder type hydraulic jack can be applied. Note that an automatic jack or a manual jack may be used, and the first jack 11 may be a hydraulic jack, and the second jack 12 may be a screw jack, which is a manual mechanical jack that does not shrink naturally.

  The assembly structure of the jack-up device 1 is as follows. The second frame 3 is inserted into the first frame 2. For this reason, in the top view, the second vertical member 31 and the frame body 32 of the second frame 3 are surrounded on the outside by the guide portion 21 of the first frame 2. With such a configuration, the second frame 3 can be displaced relative to the first frame 2 in a slidable manner in the vertical direction (jack-up / jack-down direction) (reciprocation is possible). Further, since the second frame 3 is surrounded by the guide portion 21 of the first frame 2, displacement and inclination of the second frame 3 are prevented. A gap having a certain size is formed between the second longitudinal member 31 of the second frame 3 and the guide portion 21 of the first frame 2.

  FIG. 5 is a partial cross-sectional view schematically showing the configuration in the vicinity of the four corners of the jackup device 1. In a state where the second frame 3 is inserted into the first frame 2, as shown in FIG. 5, the first receiving portion 311 ( The lower end portion of the second longitudinal member 31 is located. Therefore, by placing the first jack 11 on the first placement part 24, the first jack 11 can jack up and jack down the second frame 3 from below.

  Further, as shown in FIG. 5, the second receiving portion 25 of the first frame 2 is located above the second placement portion 331 of the second frame 3 (both ends of the seventh cross member 33). For this reason, the second jack 12 can be interposed between the first frame 2 and the second frame 3 by placing the second jack 12 on the second placement portion 331. With such a configuration, the second jack 12 can prevent the jack-up target from being inclined or toppled (details will be described later).

  The first placement portion 24 is provided near the four corners of the lower frame portion 22, and the second placement portion 331 is provided near the four corners of the frame 32 of the second frame 3. For this reason, as shown in FIG. 5, the first jack 11 and the second jack 12 are close to each other in the vicinity of the four corners of the first frame 2.

<Jack-up method>
Next, an example of a jack-up method using the jack-up device 1 according to the embodiment of the present invention will be described. FIG. 6 is a perspective view schematically showing the work of attaching the jackup device 1 to the unloader 9. As described above, the upper turning body 92 of the unloader 9 of the gulf facility is shown as an example of the jack-up target. The unloader 9 of the bay facility includes a gantry 91 that can move along the quay and an upper swing body 92 that is rotatably provided on the gantry 91 via a support shaft 911. A swing bearing (not shown) is provided between the support shaft 911 of the gantry 91 and the upper swing body 92 so as to rotatably support the upper swing body 92. With such a configuration, in order to replace the slewing bearing, it is necessary to maintain the upper slewing body 92 in a lifted state. Therefore, the upper swing body 92 is jacked up from the mount 91 using the jackup device 1 according to the embodiment of the present invention. Further, during the replacement operation of the swing bearing, the upper swing body 92 is maintained in a jacked up state. Then, after the replacement operation of the swing bearing is completed, the upper swing body 92 is jacked down and the upper swing body 92 is placed on the gantry 91.

  The first frame 2 is divided into two parts before being attached to the mount 91 of the unloader 9. That is, the second cross member 212 and the fourth cross member 222 are divided in the middle in the length direction. On the other hand, in the second frame 3, the sixth cross member 322 of the frame 32 is divided into two in the middle in the length direction, and the seventh cross member 33 is divided from the frame 32. Here, a configuration in which the first frame 2 is divided into two is shown, but a configuration in which the first frame 2 is divided into four may be used. In this case, for example, a configuration in which the first cross member 211 and the third cross member 221 are also divided in the middle in the length direction can be applied. Similarly, the frame 32 of the second frame 3 may be divided into four parts. In short, the 1st frame 2 and the 2nd frame 3 should just be the structure divided | segmented into the magnitude | size which is easy to handle in the operation | work attached to the unloader 9. FIG. If it is such a structure, the 1st frame 2 and the 2nd frame 3 can be conveyed and attached to the upper part of the mount frame 91 of the unloader 9, without using a large sized crane.

  Then, the second frame 3 is attached to the upper swing body 92 so as to surround the support shaft 911 of the unloader 9. Specifically, the upper ends of the four second vertical members 31 are joined to the lower surface of the upper swing body 92 of the unloader 9. Further, the divided frame bodies 32 are joined together. That is, the sixth cross members 322 are joined to each other in the length direction. Welding and screwing can be applied to these joints.

  Next, the first frame 2 is attached so as to surround the second frame 3 attached to the upper swing body 92. Specifically, the divided second horizontal members 212 and the fourth horizontal members 222 are joined to each other in the length direction, and the first frame 2 is integrally joined. Further, the support leg 202 is joined to the upper surface of the gantry 91. Welding and screwing can also be applied to these joints.

  Further, the seventh cross member 33 is integrally joined below the frame body 32 of the second frame 3.

  Accordingly, the second frame 3 is in a state where the outer side is surrounded by the guide portion 21 of the first frame 2. Since the first frame 2 and the second frame 3 are not joined, the second frame 3 can be displaced relative to the first frame 2 in the vertical direction.

  Then, the first jack 11 is installed on the first placement unit 24. As described above, since the first receiving portion 311 (the lower end portion of the second vertical member 31 of the second frame 3) is located above the first placement portion 24, by extending the first jack 11, the unloader 9 The upper swing body 92 can be jacked up together with the second frame 3. Further, the second jack 12 is placed on the second placement portion 331. As described above, the second receiving portion 25 (the lower surface of the guide portion 21 of the first frame 2) is positioned above the second placement portion 331. For this reason, the second jack 12 is interposed between the first frame 2 and the second frame 3.

  FIG. 7 is a partial cross-sectional view schematically showing a state in which jack-up / jack-down is performed, and is an enlarged view of a VII portion in FIG. As shown in FIG. 7, the second jack 12 is extended, and between the upper end portion (the jack ram) of the second jack 12 and the second receiving portion 25 (the lower surface of the guide portion 21) of the first frame 2, A gap C having a required dimension is formed. The dimension of the gap C is not particularly limited as long as it is a dimension that can prevent the upper swing body 92 from falling. That is, in FIG. 7, when the upper swing body 92 is inclined to the right side, the seventh cross member 33 of the second frame 3 is inclined so that the left side is lifted. If it does so, the 2nd jack 12 will be lifted and raised by the 7th cross member 33, and the upper end part will contact the 2nd receiving part 25 provided in guide part 21 of the 1st frame 2. And if the upper end part of the 2nd jack 12 contact | abuts to the 2nd receiving part 25, the 2nd flame | frame 3 cannot incline any more. As described above, the second jack 12 is interposed between the first frame 2 and the second frame 3, so that the upper swing body 92 is prevented from falling. In order to realize such an effect, the dimension of the gap C between the upper end portion of the second jack 12 and the second receiving portion 25 of the guide portion 21 of the first frame 2 is set before the balance of the unloader 9 is lost. The size is set such that the upper end portion of the second jack 12 contacts the second receiving portion 25 of the guide portion 21 of the first frame 2. This completes the jack-up preparation.

  Then, the first jack 11 is extended, and the upper swing body 92 is jacked up together with the second frame 3. At this time, the four first jacks 11 are operated in synchronization. Thereby, the upper turning body 92 can be jacked up in a state where the posture is maintained. At this time, even if there is a gap between the second vertical member 31 of the second frame 3 and the guide portion 21 of the first frame 2, by inserting a plate material (for example, a veneer plate) or the like, The position shift and inclination of the two jacks 12 can be prevented.

  Then, the second jack 12 is contracted in synchronization with the jack-up by the first jack 11. In particular, as shown in FIG. 7, the gap C between the upper end portion of the second jack 12 and the second receiving portion 25 of the first frame 2 is maintained at a required dimension. Thereby, it is possible to prevent the upper turning body 92 of the unloader 9 from being inclined or toppled during the jack-up operation. Here, as described above, the first jack 11 and the second jack 12 are arranged close to each other in the vicinity of the four corners of the first frame 2 (see FIG. 5). For this reason, the operation | work which extends the 1st jack 11 can be performed, confirming the clearance gap C of the upper end part of the 2nd jack 12, and the 2nd receiving part 25. FIG. Therefore, it becomes easy to synchronize the first jack 11 and the second jack 12.

  During the exchange operation of the slewing bearing, the upper slewing body 92 of the unloader 9 is kept jacked up by the first jack 11. At this time, the size of the gap C between the upper end portion of the second jack 12 and the guide portion 21 of the first frame 2 is maintained at the required size described above. Then, after the replacement operation of the slewing bearing is completed, the first jack 11 is contracted to jack down. At this time, the second jack 12 is extended in synchronization with the operation of contracting the first jack 11. During the jackdown operation, the gap C between the upper end portion of the second jack 12 and the second receiving portion 25 is maintained at the required dimension described above.

  After the jackdown is completed, the jackup device 1 is removed from the unloader 9. Thereafter, post-processing of the unloader 9 (such as repair of a welded portion) is performed as necessary. This completes the work.

<Summary of effects>
According to the embodiment of the present invention, as compared with a method using a crane, it is possible to improve the earthquake resistance during jack-up and jack-down operations and while maintaining the jack-up state. Specifically, in the method using a crane, if an earthquake occurs during work, there is a risk of falling or running out of the load. On the other hand, according to the embodiment of the present invention, the jack-up target is placed on the first frame 2 and the second frame 3 both during the jack-up operation and while the jack-up state is maintained. Is kept in place. In addition, the second jack 12 prevents the vehicle from falling over a predetermined angle between them. In other words, the second jack 12 interposed between the first frame 2 and the second frame 3 prevents the inclination of the jack-up object. For this reason, there is no fear of falling or swinging like a crane, and it is possible to improve the earthquake resistance.

  Moreover, according to the embodiment of the present invention, it is possible to jack up a heavy object without using a large crane. For this reason, reduction of work cost can be aimed at. Even if it is not possible to secure a place for installing a large crane, jack-up work can be performed. For this reason, it can work without choosing a work place. In particular, as described above, if the first frame 2 and the second frame 3 are divided into a plurality of parts, the jack-up device 1 can be transported to a work site such as a gantry using a small crane.

  According to the embodiment of the present invention, the work can be performed in a state in which the posture of the jack-up target is kept vertical. In particular, it is not necessary to precisely match the center of the jackup device 1 to the center of gravity of the jackup object. For example, in a method using a crane, in order to maintain the posture of the suspended load, it is necessary to lift it above the center of gravity of the suspended load (on a vertical line passing through the center of gravity). For this reason, work is troublesome. On the other hand, according to the embodiment of the present invention, since the jack-up target is lifted from a plurality of locations on the lower side, the center of gravity of the jack-up target and the center of the jack-up device 1 exactly match. Even if it is not, the jack-up object does not tilt. For this reason, the work effort can be reduced.

  As mentioned above, although embodiment of this invention was described in detail, the said embodiment is only what showed the example of actualization in implementing this invention. The technical scope of the present invention should not be construed as being limited by the embodiment. That is, the present invention can be implemented in various forms without departing from the technical idea or the main features thereof.

  For example, the specific dimensions of each part of the jackup device 1 are appropriately set according to the dimensions and structure of the jackup object, and are not particularly limited. In the embodiment of the present invention, the configuration in which the first frame 2 and the second frame 3 are formed in a quadrangular shape when viewed from above is shown, but the shape of the first frame 2 and the second frame 3 is limited to a quadrangular shape. Is not to be done. For example, it may be a polygonal shape other than a quadrilateral such as a pentagon or a hexagon. And the structure by which the 2nd vertical member 31 is provided in each corner | angular part of polygonal shape can be applied to the 2nd frame 3. FIG. For example, if the first frame 2 and the second frame 3 are formed in a hexagonal shape, a configuration in which the third frame 33 is provided in the second frame 3 can be applied. On the other hand, the 1st frame 2 is formed in the substantially similar shape to the 2nd frame 3, and the structure by which the 1st mounting part 24 is provided in the corner vicinity is applicable.

  The present invention is a technique suitable for a jack-up device and a jack-up method for jacking up heavy objects. And according to this invention, when maintaining the state which lifted the heavy article, earthquake resistance can be ensured in the lifted state without using a large crane, and it can work at low cost.

1: Jack-up device, 11: First jack, 12: Second jack, 2: First frame, 201: Reinforcement rib, 202: Support leg, 21: Guide part, 211: First cross member, 212: Second Cross member, 22: lower frame part, 221: third cross member, 222: fourth cross member, 23: first vertical member, 24: first placing part 24, 241: reinforcing plate, 25: second receiving part 25, 251: current plate, 3: second frame, 31: second longitudinal member, 311: first receiving portion 311, 32: frame, 321: fifth transverse member, 322: sixth transverse member, 33: first Seven cross members, 331: second placement portion 331, 9: unloader, 91: gantry, 911: support shaft, 92: upper swing body, C: gap

Claims (6)

A first frame that is attached to the foundation on which the jack-up object is placed;
A second frame that is displaceable in the vertical direction with respect to the first frame and is attached to the jack-up object;
A plurality of first jacks and a plurality of second jacks provided between the first frame and the second frame;
Have
The plurality of first jacks are provided between a first placement portion provided on the first frame and a first receiving portion provided on the second frame and positioned above the first placement portion. And
The plurality of second jacks are provided between a second placement portion provided on the second frame and a second receiving portion provided on the first frame and positioned above the second placement portion. A jack-up device. The first frame has a guide portion that is provided above the first placement portion and surrounds the outside of the second frame in a top view.
The jackup device according to claim 1, wherein the second receiving portion is provided in the guide portion. The second frame has a plurality of rod-shaped members that are vertically raised and whose upper end portions are joined to the jack-up object,
A frame that supports the plurality of rod-shaped members;
A plurality of rod-shaped members provided below the frame and extending in the horizontal direction;
Have
The jackup device according to claim 1 or 2, wherein the second mounting portion is provided on a plurality of rod-shaped members extending in the horizontal direction. The first frame and the second frame are each formed in a polygonal shape in a top view,
The plurality of first jacks and the plurality of second jacks are provided in close proximity to each other in the vicinity of the corners of the polygonal shape, respectively. Jack-up device. A jackup method using the jackup device according to any one of claims 1 to 4,
Jacking up the object to be jacked up by extending the plurality of first jacks, and shrinking the plurality of second jacks when extending the plurality of first jacks, A jackup method characterized by maintaining a state in which a gap is formed between the second receiving portion and the second receiving portion. The first frame and the second frame are each divided into a plurality of pieces,
When attaching the second frame to the jack-up object, the second frame is joined together,
The jackup method according to claim 5, wherein the first frame is integrally joined when the first frame is attached to a base portion on which the jackup object is placed.

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