Erection device and erection method of heavy goods

Abstract

To erect easily and safely heavy goods even in a narrow working space.SOLUTION: An erection device presses the left and right corners of the bottom side in contact with the floor surface F of the bottom plate of a heavy good H and supports it using an L-shaped pressing plate 35a of a bottom plate pressing mechanism provided to extend from the base of an erection device 1, hooks a load chain 23b of a chain block 21b hanging from a steel beam 12 to an auxiliary chain 28 installed on the top side of the heavy good H top plate, and hooks the load chain 23a of the chain block 21a to an auxiliary chain 31 installed on the top side of the heavy good H bottom plate. The erection device eliminates the slack by shortening (raising) the load chain 23a of the chain block 21a while lifting the top plate side of the heavy good H by shortening (raising) the load chain 23b of the chain block 21b. The heavy good H is erected by extending (lowering) the load chain 23a since the tension (extension) begins to apply on the load chain 23a by acting in the direction in which the heavy good H erects under its own weight.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] An embodiment of the present invention relates to a device and a method for erecting a heavy object. [Background technology]

[0002] For example, when heavy equipment (heavy objects: for example, 500 kg) such as control panels and operation panels is carried into a building or moved within the building, a mobile gantry crane is used.

[0003] The heavy object is lifted by a mobile gantry crane and moved to the desired installation location within the building, where it is lowered onto the floor of the installation location after being adjusted to the desired posture and orientation by workers. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-037585 [Patent Document 2] Japanese Patent Application Laid-Open No. 2013-100178 [Patent Document 3] Japanese Patent Application Laid-Open No. 2002-356296 Summary of the Invention [Problem to be solved by the invention]

[0005] Although mobile gantry cranes are smaller than the large gantry cranes installed in factories, for example, they are generally more than 3m tall and cannot be used in places with low ceilings and limited working space.

[0006] In such cases, the heavy object to be installed is manually carried and installed by a large number of workers who are capable of carrying it, but it is not enough to simply carry it to the installation location; it also needs to be moved into the specified position and orientation and lowered onto the floor of the installation location.

[0007] For this reason, when the object to be installed is, for example, a vertically long control panel (heavy object), the heavy object will inevitably be carried to the installation location by a large number of workers in a horizontal position, and then erected vertically at the installation location, which can lead to safety issues such as the heavy object falling or workers' hands and feet getting caught.

[0008] The problem to be solved by the present invention is to provide a device and a method for erecting a heavy object that can erect a heavy object easily and safely even in a narrow working space. [Means for solving the problem]

[0009] The heavy object erection device of the embodiment is A pair of base steels having a predetermined length and arranged parallel and horizontally with a predetermined width therebetween; A pair of support steel columns erected with the pair of base steel columns as base portions, respectively; A beam steel provided between the upper ends of the pair of column steels; a bottom plate pressing mechanism having a pair of rod-shaped support steels that are rotatable horizontally and vertically with the bases of the pair of support steels as base ends, and that presses and supports both edges of the bottom plate of a heavy object that is laid on a floor surface, the edges coming into contact with the floor surface, with the tip ends of the pair of support steels; one chain block that is hung down from the beam steel and that is used by hanging a load chain on a rope material attached along the upper side of the top plate of the laid heavy object; and another chain block that is hung down from the beam steel and that is used by hanging a load chain on a rope material attached along the upper side of the bottom plate of the laid heavy object, The load chain of one of the chain blocks is wound up and raised to lift the top plate side of the heavy object, while the load chain of the other chain block is wound up and raised to eliminate slack, and when the heavy object acts in the direction of standing up due to its own weight and tension begins to be applied to the load chain of the other chain block, the load chain of the other chain block is loosened and lowered to stand the heavy object. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a front view showing the external configuration of an apparatus 1 for erecting a heavy object according to an embodiment when not in use. [Figure 2] FIG. 2 is a right side view showing the external configuration of the standing device 1 in use before a heavy object H, which is an object to be stood up, is stood up. [Figure 3] FIG. 3 is a top view showing the external configuration of the standing device 1 in use before a heavy object H, which is an object to be stood up, is stood up. [Figure 4] Figure 4 is a plan view showing the connection structure between the pivoting members 32a, 32b provided at the lower ends of a pair of support steel columns 11a, 11b of the portal frame GF in the erection device 1, and the support steel columns 33a, 33b and L-shaped pressure plates 35a, 35b that support the left and right edges (corners) of the lower side of the bottom plate of the heavy load H that contact the floor surface F, using the pivoting members 32a, 32b as a base. [Figure 5] FIG. 5 is a right side view illustrating a process (part 1) of erecting a heavy object H by the erection device 1. FIG. [Figure 6] FIG. 6 is a right side view illustrating a process (part 2) of erecting a heavy object H by the erection device 1. FIG. [Figure 7] FIG. 7 is a right side view illustrating a process (part 3) of erecting a heavy object H by the erection device 1. FIG. [Figure 8] FIG. 8 is a right side view illustrating a process (part 4) of erecting a heavy object H by the erection device 1. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0012] (Configuration and Function of the Embodiment) FIG. 1 is a front view showing the external configuration of a heavy object erection device 1 according to an embodiment when not in use.

[0013] FIG. 2 is a right side view showing the external configuration of the standing device 1 in use before a heavy object H, which is an object to be stood up, is stood up.

[0014] FIG. 3 is a top view showing the external configuration of the standing device 1 when in use, before a heavy object H, which is an object to be stood up, is stood up.

[0015] In the embodiment, it is assumed that the height from the floor F to the ceiling C of the work space in which the standing up device 1 is used is, for example, about 2.4 m, but it is not limited to this.

[0016] The erection device 1 is equipped with a portal frame GF consisting of a pair of support steel columns 11a, 11b of a preset adjustable height (e.g., about 1.7 to 2.3 m) that are erected parallel and vertically with a preset width (e.g., about 2.5 m) between them, and a beam steel 12 that is installed between the upper ends of the support steel columns 11a, 11b.

[0017] The support steels 11a, 11b have cylindrical base support steels 13a, 13b, and expansion steels 14a, 14b inserted into the cylindrical spaces of the base support steels 13a, 13b from openings at the upper ends so as to be vertically slidable.

[0018] The support steels 11a, 11b can be extended or retracted to any desired height and fixed by selectively screwing height adjustment bolts 16 that pass through the sides of the base support steels 13a, 13b into multiple rows of bolt holes 15 that are provided at regular intervals in the vertical direction on the sides of the extension steels 14a, 14b (support steel extension mechanism).

[0019] The column steel telescoping mechanism is not limited to a configuration that combines multiple rows of bolt holes 15 provided in the telescoping steels 14a, 14b and height adjustment bolts 16 that are attached by penetrating the side of the base column steels 13a, 13b, but may also be configured, for example (not shown), by a handle provided on the side of the base column steels 13a, 13b and multiple gears combined to slide the telescoping steels 14a, 14b up and down in conjunction with the rotation of the handle.

[0020] The base support steel columns 13a, 13b are each erected using the central parts of a pair of base steel columns 17a, 17b of a predetermined length (for example, approximately 1.2 m) arranged parallel and horizontally across the width of the erection device 1 as their bases.

[0021] The base support steels 13a, 13b are stably supported vertically by support steels 18a, 18b that are inclined from the front and rear ends of the base steels 17a, 17b toward the front and rear sides of the base support steels 13a, 13b.

[0022] Casters 19 with stoppers are provided at four locations on the front and rear ends of the underside of each of the pair of base steels 17a, 17b, allowing the erection device 1 to move on the floor surface F.

[0023] The rolling surface of the caster 19 is covered with, for example, a rubber material with high friction to prevent slipping on the floor surface F.

[0024] Furthermore, the casters 19 can be designed to be able to be stored / pulled out from the underside of the base steels 17a, 17b inside the base steels 17a, 17b as needed, so that the base steels 17a, 17b can be installed directly on the floor surface F, allowing the erection device 1 to be installed more firmly on the floor surface F.

[0025] A pair of U-shaped brackets 20a, 20b are provided on the underside of adjacent beam steels 12 on either side of the widthwise center of the portal frame GF, and chain blocks 21a, 21b are attached to and hang down from the U-shaped brackets 20a, 20b by latch hooks (hooks with latches) 22a, 22b, respectively.

[0026] Chain blocks 21a, 21b are manual hoists for raising and lowering heavy objects. For example, by pulling hand chains 25a, 25b, which are unwound in a U-shape from the main body and returned, in one direction or the other, the length of load chains 23a, 23b unwound from the main body is loosened and extended or wound up and shortened, thereby lowering or raising latch hooks 24a, 24b at the ends of load chains 23a, 23b.

[0027] Here, taking into consideration the operability of each of the adjacently suspended chain blocks 21a and 21b, the chain blocks 21a and 21b are suspended at different heights.

[0028] In this embodiment, the standing device 1 is used by positioning the front of the standing device 1 facing the bottom plate of a heavy object (e.g., a control panel) H, which is the object to be stood up, placed in a lying position on a floor surface F.

[0029] 2 and 3 shows a state in which the heavy load H is vertically long and is laid on a floor surface F with its bottom plate facing left and its top plate facing right. Here, it is assumed that the front of the heavy load H (for example, the operating surface of a control panel) faces upward in the illustration.

[0030] The heavy load H has bolt holes (not shown) at the four corners of the top plate to which, for example, eyebolts 26a and 26b can be attached and detached. The heavy load H also has installation and fixing holes (not shown) at the four corners of the bottom plate to fit onto installation and fixing pins (not shown) that are erected on the floor surface F, and eyebolts 29a and 29b can be attached and detached via the installation and fixing holes with nuts.

[0031] Of the chain blocks 21a and 21b, the latch hook 24a at the tip of the load chain 23a of one of the chain blocks 21a is hooked (attached) to an auxiliary chain 31 (rope material: it can be wire, rope, etc.) that is stretched between eye bolts 29a and 29b attached to the left and right corners of the upper side of the bottom plate of the heavy load H by latch hooks 30a and 30b.

[0032] In addition, the latch hook 24b at the tip of the load chain 23b of the other chain block 21b is hooked (attached) to an auxiliary chain 28 (a rope material: it can also be wire or cord) that is stretched between eye bolts 26a, 26b attached to the left and right corners of the upper side of the top plate of the heavy load H by latch hooks 27a, 27b.

[0033] Figure 4 is a plan view showing the connection structure between the pivoting members 32a, 32b provided at the lower ends of a pair of support steel columns 11a, 11b of the portal frame GF in the erection device 1, and the support steel columns 33a, 33b and L-shaped pressure plates 35a, 35b that support the left and right edges (corners) of the lower side of the bottom plate of the heavy load H that contact the floor surface F, using the pivoting members 32a, 32b as a base.

[0034] At the lower end of each of the pair of base support steel members 13a, 13b in the portal frame GF, annular rotating members 32a, 32b that can rotate horizontally are provided along the cylindrical outer peripheral surfaces of the base support steel members 13a, 13b, as shown by arrow rh in Figure 4.

[0035] The downward movement of the pivoting members 32a, 32b relative to the base support steel members 13a, 13b is restricted by the base steel members 17a, 17b, and the upward movement is restricted by flanges (not shown) provided on the outer circumferential surfaces of the base support steel members 13a, 13b along the upper ends of the pivoting members 32a, 32b.

[0036] The rotating members 32a, 32b are each provided with support steel mounting portions 34a, 34b on a portion of their annular side surfaces, as shown by arrow rv1 in Figure 4, which have base end support shafts 34aj, 34bj that support rod-shaped support steels 33a, 33b so that they can rotate in the vertical direction with their base ends as fulcrums.

[0037] The support steels 33a, 33b are used to press and support the left and right edges (corners) of the lower side of the bottom plate of the heavy object H placed on the floor surface F so that it does not shift (move) toward the erection device 1, and at the tip of the support steels 33a, 33b, L-shaped presser plates 35a, 35b are provided that wrap around in an L shape from the bottom plate to the side and press the left and right corners of the lower side of the bottom plate of the heavy object H via tip support shafts 38a, 38b that are arranged parallel and horizontally in the width direction of the erection device 1, i.e., along the bottom plate of the heavy object H.

[0038] The L-shaped pressure plates 35a, 35b are each an L-shaped plate made up of bottom plate pressure plates 36a, 36b that press the bottom side of the heavy object H and side plate pressure plates 37a, 37b that press the side side, and the L-shaped pressure plates 35a, 35b are supported so as to be rotatable in the front-to-back direction of the erection device 1, i.e., in the direction along the side of the heavy object H, with the tip support shafts 38a, 38b as fulcrums, as shown by arrow rv2 in Figure 4.

[0039] The surfaces of the bottom plate pressing plates 36a, 36b and side plate pressing plates 37a, 37b of the L-shaped pressing plates 35a, 35b are covered with anti-slip materials 39a, 39b made of, for example, a rubber material with high friction to prevent the pressed heavy load H from slipping.

[0040] The connection between the support steel mounting parts 34a, 34b of the rotating members 32a, 32b and the base ends of the support steels 33a, 33b, and between the tips of the support steels 33a, 33b and the L-shaped retainer plates 35a, 35b are all made with some play, and as shown by arrow P in Fig. 4, the L-shaped retainer plates 35a, 35b are arranged to be swingable in the width direction of the erecting device 1, i.e., the width direction of the heavy load H, relative to the rotating members 32a, 32b or the support steels 33a, 33b. This allows the L-shaped retainer plates 35a, 35b at the tips of the support steels 33a, 33b to fit snugly against the left and right corners of the lower side of the bottom plate of the heavy load H, regardless of the width of the heavy load H to be erected.

[0041] Here, the structure connecting the rotating members 32a, 32b, the support steels 33a, 33b, and the L-shaped pressure plates 35a, 35b is defined as a bottom plate pressure mechanism for the edge of the bottom plate of the heavy object H to be erected that comes into contact with the floor surface F.

[0042] 1, when the erection device 1 is not in use (unused), the rotating members 32a, 32b or the support steels 33a, 33b and the L-shaped retaining plates 35a, 35b (bottom plate retaining mechanism) rotate toward the inside of the portal frame GF so that they overlap each other, and are stored by being bound together with binding members 40 such as hook-and-loop fasteners or belts. The rod-shaped support steels 33a, 33b may be configured to expand and contract in stages, allowing for more compact storage.

[0043] (Operation of the embodiment) Next, a procedure for erecting a heavy object H using the heavy object erecting device 1 of the embodiment will be described.

[0044] FIG. 5 is a right side view illustrating a process (part 1) of erecting a heavy object H by the erection device 1. FIG.

[0045] FIG. 6 is a right side view illustrating a process (part 2) of erecting the heavy object H by the erection device 1. As shown in FIG.

[0046] FIG. 7 is a right side view illustrating a process (part 3) of erecting the heavy object H by the erection device 1. As shown in FIG.

[0047] FIG. 8 is a right side view illustrating a process (part 4) of erecting the heavy object H by the erection device 1. FIG.

[0048] (1) As shown in Figures 2 and 3, the erection device 1 is placed so that its front faces the bottom plate side of a heavy object H placed on a floor surface F, and the bottom plate holding mechanism, which includes the rotating members 32a, 32b or the support steels 33a, 33b and the L-shaped holding plates 35a, 35b, are rotated forward on the erection device 1 to open it.

[0049] (2) With the L-shaped pressure plates 35a, 35b at the tips of the support steels 33a, 33b of the opened bottom plate pressure mechanism aligned with the left and right corners of the bottom side of the bottom plate of the heavy object H, the stoppers of the casters 19 are activated or the casters 19 are stored inside the base steels 17a, 17b to fix the movement of the erection device 1 relative to the floor surface F.

[0050] (3) The load chain 23b of one chain block 21b is extended, and the latch hook 24b at the tip of the load chain 23b is hooked (attached) to the auxiliary chain 28 that is hung between the eyebolts 26a, 26b attached to the left and right corners of the upper side of the top plate of the heavy load H. In addition, the load chain 23a of the other chain block 21a is extended, and the latch hook 24a at the tip of the load chain 23a is hooked (attached) to the auxiliary chain 31 that is hung between the eyebolts 29a, 29b attached to the left and right corners of the upper side of the bottom plate of the heavy load H.

[0051] (4) As shown in Figure 5, worker W pulls hand chain 25b of one chain block 21b in one direction as indicated by arrow a1, thereby winding and shortening (raising) load chain 23b as indicated by arrow b1, and lifts the upper part (top plate side) of heavy load H using the lower edge of the bottom plate of heavy load H, which is held down by support steels 33a, 33b and L-shaped holding plates 35a, 35b of the bottom plate holding mechanism, as a fulcrum.

[0052] At this time, as shown by arrow R in Figure 2, the upper edge of the bottom plate of the heavy load H, on which the latch hook 24a of the other chain block 21a is hooked, begins to approach the latch hook 22a, which is the fulcrum that hangs the chain block 21a from the beam steel 12 of the portal frame GF, and as shown in Figure 5, the load chain 23a of the other chain block 21a begins to slacken.

[0053] (5) As shown in Figure 6, the worker W continues to pull the hand chain 25b of one chain block 21b in one direction as shown by arrow a2, thereby winding and shortening (raising) the load chain 23b as shown by arrow b2, further lifting the upper part (top plate side) of the heavy load H, and at the same time, pulls the hand chain 25a of the other chain block 21a in one direction as shown by arrow a3, thereby winding and shortening (raising) the load chain 23a as shown by arrow b3, thereby eliminating the slack.

[0054] At this time, as shown by arrow R in Figure 2, the trajectory of the upper edge of the bottom plate of the heavy load H to which the latch hook 24a of the other chain block 21a is hooked changes in a direction approaching the latch hook 22a (beam steel 12 of the portal frame GF) from which the chain block 21a is hanging down until a certain angle of raising, and once the certain angle of raising is exceeded, it changes in a direction away from the latch hook 22a from which the chain block 21a is hanging down.

[0055] For example, if the height of the latch hook 22a from which the other chain block 21a is suspended is equal to the distance from the base of the support steel columns 11a, 11b of the portal frame GF to the lower edge of the bottom plate of the heavy load H supported via the support steel columns 33a, 33b, the trajectory indicated by arrow R changes in a direction approaching the latch hook 22a up to an erection angle of approximately 45 degrees, and then changes in a direction away from the latch hook 22a once the erection angle exceeds approximately 45 degrees.

[0056] In addition, depending on the width and height of the heavy object H, in the process of standing up from a lying (fallen) position on the floor F, its own weight acts in the direction of returning to its original position (falling) up to a certain standing angle, and once the standing angle is exceeded, its own weight acts in the direction of standing up.

[0057] (6) As shown in Figure 7, worker W continues to pull the hand chain 25b of one chain block 21b in one direction as indicated by arrow a4, thereby winding and shortening (raising) the load chain 23b as indicated by arrow b4, and in the process of further lifting the upper part (top plate side) of the heavy load H (the process of raising the heavy load H), checks when tension (extension) due to the weight of the heavy load H begins to be applied to the load chain 23a of the other chain block 21a.

[0058] (7) As shown in Figures 7 and 8, the worker W slowly pulls the hand chain 25a of the other chain block 21a toward the other side as shown by arrows c1 and c2, thereby slowly loosening and extending (lowering) the load chain 23a as shown by arrows d1 and d2, and raising the heavy object H.

[0059] At this time, the force of the heavy load H attempting to stand due to its own weight is slowly released by the other chain block 21a while the heavy load H is being stood up, so the heavy load H can be stood up easily and safely without endangering the safety of the worker W, which would occur if the heavy load H stood up all at once due to its own weight. Even if a force acts in the direction of standing up all at once, the length of the load chain 23a while it is being extended is shorter than the length of the load chain 23a when standing up is complete, so there is little chance of the heavy load H coming into contact with the ground (floor surface F). This is the case when the vertical distance from the latch hook 22a to the ground (floor surface F) is equal to the horizontal distance on the floor surface F from the heavy load H before standing to the erecting device 1.

[0060] (8) As shown in Figure 8, worker W supports heavy object H using, for example, a hand lifter (not shown), a gap left between the bottom plate of heavy object H after it has been stood up and the floor surface F by sandwiching eye bolts 29a, 29b and bottom plate clamping plate 36a of L-shaped clamping plates 35a, 35b, and then removes eye bolts 29a, 29b and L-shaped clamping plates 35a, 35b, and places heavy object H on the floor surface F.

[0061] In addition, the bottom plate holding mechanism of the erection device 1 can also be used as a small gantry crane by, for example, rotating the support steels 33a, 33b and the L-shaped holding plates 35a, 35b upward along a pair of support steels 11a, 11b, respectively, and binding and storing them to the support steels 11a, 11b.

[0062] (Summary of the embodiment) According to the heavy load erection device 1 of the embodiment, the erection device 1 is arranged so that its front surface faces the bottom plate side of the heavy load H that is lying on the floor surface F, and L-shaped pressure plates 35a, 35b of the bottom plate pressing mechanism that are provided to extend from the bases of the support steel columns 11a, 11b press down on the left and right corners of the bottom side of the bottom plate of the heavy load H that contact the floor surface F to support the heavy load H. In addition, the latch hook 24b of the load chain 23b of one chain block 21b hanging down from the beam steel 12 is hooked on the auxiliary chain 28 attached along the upper side of the top plate of the heavy load H, and the latch hook 24a of the load chain 23a of the other chain block 21a is hooked on the auxiliary chain 31 attached along the upper side of the bottom plate of the heavy load H.

[0063] Then, the load chain 23b of one chain block 21b is wound up and shortened (raised) to lift up the top plate side of the heavy load H, while the slack in the load chain 23a of the other chain block 21a is wound up and shortened (raised) to eliminate it. After this, as the heavy load H begins to act in the direction of standing up due to its own weight, tension (extension) begins to be applied to the load chain 23a of the other chain block 21a, and then the load chain 23a is slowly loosened and extended (lowered) until the heavy load H stands up on the floor surface F.

[0064] Therefore, even in a narrow work space, the heavy object H will not fall and the worker's hands and feet will not be caught, and the heavy object H can be easily and safely erected.

[0065] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the scope of the invention and its equivalents as defined in the claims. [Explanation of symbols]

[0066] 1...erecting device, 11a, 11b...pillar steel, 12...beam steel, 13a, 13b...base pillar steel, 14a, 14b...telescopic steel, 15...bolt hole, 16...height adjustment bolt, 17a, 17b...base steel, 19...caster, GF...portal frame, 20a, 20b...U-shaped bracket, 21a, 21b...chain block, 23a, 23b...load chain, 24a, 24b...latch hook, 25a, 25b...hand chain, 28, 31...auxiliary chain (rope material), 32a, 32b...rotating member, 33a, 33b...support steel, 35a, 35b...L-shaped retaining plate, 40...binding body.

Claims

1. A pair of base steels having a predetermined length and arranged parallel and horizontally with a predetermined width therebetween; A pair of support steel columns erected with the pair of base steel columns as base portions, respectively; A beam steel provided between the upper ends of the pair of column steels; a bottom plate pressing mechanism having a pair of rod-shaped support steels that are rotatable horizontally and vertically with the bases of the pair of support steels as base ends, and that presses and supports both edges of the bottom plate of a heavy object that is laid on a floor surface, the edges coming into contact with the floor surface, with the tip ends of the pair of support steels; one chain block that is hung down from the beam steel and that is used by hanging a load chain on a rope material attached along the upper side of the top plate of the laid heavy object; and another chain block that is hung down from the beam steel and that is used by hanging a load chain on a rope material attached along the upper side of the bottom plate of the laid heavy object, This heavy object erecting device winds up and lifts the load chain of one chain block to lift the top plate side of the heavy object, while winding up and lifting the load chain of the other chain block to eliminate slack, and when the heavy object acts in the erecting direction under its own weight and tension begins to be applied to the load chain of the other chain block, it loosens and lowers the load chain of the other chain block to erect the heavy object.

2. The one chain block and the other chain block suspended from the beam steel are suspended adjacent to each other across the center of the width direction of the erecting device. The apparatus for erecting a heavy object according to claim 1.

3. Casters with stoppers are provided at four locations, one end and the other end, of the lower surface of each of the pair of base steels in the longitudinal direction, and the rotating surface is covered with a material to prevent slipping. The apparatus for erecting a heavy object according to claim 1 or 2.

4. The support steel has a support steel extension mechanism that enables the height of the support steel to be extended or shortened with the base steel as a base. The apparatus for erecting a heavy object according to claim 1 or 2.

5. The bottom plate pressing mechanism is supported at the tip end of each of the pair of support steels so as to be rotatable in a direction along the side of the heavy object via a tip support shaft that is provided horizontally and parallel to the width direction of the erecting device, and has an L-shaped pressing plate that wraps around from the bottom plate of the heavy object to the side and presses down the corners of both edges that come into contact with the floor surface on the bottom plate of the heavy object. The apparatus for erecting a heavy object according to claim 1 or 2.

6. A pair of base steels having a predetermined length and arranged parallel and horizontally with a predetermined width therebetween; A pair of support steel columns erected with the pair of base steel columns as base portions, respectively; A beam steel provided between the upper ends of the pair of column steels; a bottom plate pressing mechanism having a pair of rod-shaped support steels that are rotatable horizontally and vertically with the bases of the pair of support steels as base ends, and that presses and supports both edges of the bottom plate of a heavy object that is laid on a floor surface, the edges coming into contact with the floor surface, with the tip ends of the pair of support steels; one chain block that is hung down from the beam steel and that is used by hanging a load chain on a rope material attached along the upper side of the top plate of the laid heavy object; and another chain block that is hung from the beam steel and that is used by hanging a load chain on a rope material attached along the upper side of the bottom plate of the laid heavy object, This method for erecting a heavy object involves winding up and lifting the load chain of one of the chain blocks to lift the top plate side of the heavy object, while winding up and lifting the load chain of the other chain block to eliminate slack, and when the heavy object acts in the erecting direction under its own weight and tension begins to be applied to the load chain of the other chain block, loosening and lowering the load chain of the other chain block to erect the heavy object.

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