JP3166609B2 - Lifting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension rod attaching / detaching apparatus and a suspension rod connecting method, and detaches and attaches a suspension rod used for lifting and lowering a boiler module of a large power plant in accordance with lifting and lowering using a jack. The present invention relates to a suspension rod attaching / detaching apparatus and a suspension rod lifting / lowering method suitable for the above.

[0002]

2. Description of the Related Art FIG. 23 shows a conventional suspension rod used for lifting heavy objects, for example, when installing a power generation facility. This hanging rod 10 is made long by screwing a plurality of rods 10S in the axial direction,
It is hung from a steel-framed beam at a high position, and is used to gradually raise or lower the boiler module on which the piping equipment and the like are mounted on the ground according to the mounting condition. The rod unit 10S, which is an element constituting such a hanging rod 10, has a shape in which a plurality of support members 12 having a top shape are continuously provided in the axial direction.
A male screw part 14 is formed at one end, and a female screw part 16 that is screwed with the male screw part of another rod alone is provided at the other end. The length of the suspension rod 10 having such a configuration is about 5 m in consideration of storage space, convenience for transporting between work sites, handling, workability in lifting heavy loads, and the like. It is formed in length. When the suspension rod 10 is used, a plurality of rods 10S are screwed and connected to each other in the axial direction, and can be lifted by a jack in a state where a heavy object is suspended at a lower part.

[0003] That is, as shown in FIG. 24, a steel column 22 is installed around a heavy structure 20, and the steel column 22 is installed.
A temporary beam 24 is protruded from the upper part of the space, and a center hole type jack 26 is disposed on the beam 24 to support a suspension rod 10 having a structure 20 such as a boiler module attached to a lower end thereof. The suspension rod 10 is configured by connecting the suspension rod unit 10S shown in FIG. 23 corresponding to the lifting height of the structure 20. And the center hole type jack 26 is
As shown in FIG. 25, the support 12 provided on the rod 10
The lifting rod 10 is pushed up through to lift the structure 20.

That is, the center hole type jack 26
As shown in FIG. 25, a cylindrical ram 32 driven by hydraulic pressure is disposed inside a cylinder 30, and the axis of the suspension rod 10 is provided at the upper part of the ram 32 and the lower part of the cylinder 30. An upper chuck 34 and a lower chuck 36 that slide in a direction orthogonal to each other are provided. The hanging rod 10 is supported by these chucks 34 and 36 and is pushed up to lift the structure 20.

In the lifting procedure, as shown in FIG. 25A, first, a suspension rod 10 which suspends a structure 20 is supported by an upper chuck 34, and the load of the structure 20 is received by the upper chuck 34. Then, the lower chuck 36 is opened. Then, in this state, the ram 32 is actuated, the lifting rod 10 is pushed up by one frame (one of the support portions 12), and the structure 20 is lifted via the hanging rod 10.
Next, when the suspension rod 10 has moved up by one frame, the lower chuck 36 is closed, the ram 32 is lowered, and a lifting load (suspension load) is received by the lower chuck 36 via the support portion 12. When the lower chuck 36 supports the suspension rod 10, the upper chuck 34 is opened and the ram 32 is further lowered. Then, when the upper chuck 34 has reached a position below the supporting portion one below the supporting portion that has been supported, the upper chuck 34 is closed again, the hanging rod 10 is supported by the upper chuck 34, and the lower chuck 36 is moved. Open and repeat the above operation. Thus, the rod 1
When the mutual connection position of 0 has risen to the upper part of the center hole type jack 26, the lifting operation is temporarily suspended and the upper rod unit 10S is removed.

[0006] The work of removing the suspension rod 10 is performed by using a crane or other equipment so that the rod 10S to be removed does not fall or fall.
After holding S, the upper rod unit 10S, which is screwed and connected, is manually rotated in the uncoupling direction using a tool such as a chain wrench, and the upper rod unit 10S is removed from the lower rod unit 10S. The detached rod 10S is temporarily stored on a temporary beam 24 on which the center hole type jack 26 is installed by a device such as a crane, or is lowered and stored on the ground.

[0007]

By the way, in the conventional lifting and lowering support apparatus for lifting a load via the lifting rod 10, the load of the lifting load directly acts on the lifting rod. When a large load change or a shock is applied to the lifting object, the load change or the shock is directly transmitted to the suspension rod 10 to damage the suspension rod, or to cause a large load variation on the jack 26 supporting the suspension rod. Is not preferred. Furthermore, even if a plurality of jacks are controlled in synchronization, it is difficult to make the stroke displacement of each jack uniform due to the effects of manufacturing errors and oil leaks between the jacks. The lifting load tilts due to the difference in
Large bending stress acts on the suspension rod to cause bending deformation of the suspension rod, which makes it difficult to remove the rod unit 10S or makes the rod unusable.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks of the prior art, and has as its object to provide a lifting / lowering support device which can reduce a shock or the like transmitted from a lifting material to a suspension rod. The purpose is. It is another object of the present invention to provide a lifting / lowering support device which does not damage a suspension rod even when a difference in lifting amount between a plurality of jacks occurs.

[0009]

In order to achieve the above object, a lifting object lifting and lowering support device according to the present invention hangs a lifting object by a suspension rod and uses a lifting jack provided on the suspension rod. A lifting object lifting and lowering support device for lifting and lowering the lifting object, wherein a cylindrical seat is provided on one of the connecting portions of the hanging rod and the lifting object, and the cylindrical seat and another seat surface abutting on the cylindrical seat are provided. Are formed of materials having different yield points, and the surface pressure of the seat surface at the maximum design load is set to an intermediate value between the yield points of the seats.

The lifting device for lifting and lowering a load according to the present invention comprises:
A lifting object lifting and lowering support device for suspending a lifting object by a plurality of hanging rods and lifting and lowering the lifting object by a plurality of lifting object jacks provided for each of the hanging rods. A balance beam is arranged on the lower surface, and a seat surface for supporting a load is formed at a portion facing the balance beam and the support point of the lifting object, and the balance beam can be swung with at least one of the seats as a spherical seat. The balance beam is provided with connecting portions of the suspension rods on both sides of the spherical seat. It is desirable that a cylindrical seat be provided between the lower surface of the balance beam and the rod connecting member at a connecting portion of the suspension rod to the balance beam, so that the swing displacement of the balance beam can be absorbed by the cylindrical seat.

Further, in the lifting device for lifting and lowering a lifted object according to the present invention, the lifted object is suspended by a lifting rod, and the lifting object is lifted and lowered by lifting jacks provided for each of the lifting rods. A support device, wherein a balance beam is arranged on a lower surface of the lifting object, and a seating surface for supporting a load is formed at a portion facing the balance beam and a support point of the lifting object, and at least one of the seats is provided. Is used as a spherical seat, and the balance beam is swingable, and the balance beam is provided with auxiliary balance beams serving as connecting portions of the suspension rods on both sides of the spherical seat, and the suspension rod is inserted through the auxiliary balance beam. At the same time, a cylindrical seat is provided between the connecting member of the suspension rod and the lower surface of the auxiliary balance beam, so that the swing of the suspension rod can be absorbed. The cylindrical seat and the other seat surface to be brought into contact with the cylindrical seat are formed of materials having different yield points, and the surface pressure of the seat surface at the maximum design load is set in the middle of the yield point of each seat.

[0012]

According to the above construction, a cylindrical seat is provided at a connecting portion between the suspension rod and the lifting object, and the cylindrical seat and another seat surface contacting the cylindrical seat are formed of materials having different yield points. By setting the surface pressure of the seat surface at the design load to the middle of the yield point of each seat, instantaneous load changes and shocks within the maximum design load range are absorbed by the elastic deformation of each seat. . In addition, if there is an instantaneous load change or shock that exceeds the maximum design load, the seat with a low yield point is plastically deformed and absorbs the load change and shock, so the moment transmitted to the suspension rod is reduced. Thus, the load change and the shock can be reduced, and the damage to the suspension rod and the load on the jack supporting the suspension rod can be reduced.

[0013] Further, by supporting the lifting object by the suspension rod via the balance beam, if a difference in the amount of lifting between the jacks occurs, the difference can be more easily absorbed by the swing of the balance beam. Can be. For this reason, even if the lifting object is inclined, it is possible to prevent a large bending stress from acting on the suspension rod, and it is possible to prevent the suspension rod from being deformed such as swinging or bending. Further, by providing an auxiliary balance beam on the balance beam and supporting the balance beam with the suspending rod via the auxiliary balance beam, when supporting a heavy lifting object by a plurality of balance beams, the distance between each jack is reduced. Even if the lifting load is inclined and the lifting object is tilted in any direction, the lifting beam is absorbed by the balance beam and the auxiliary balance beam, and the lifting rod may be bent and the lifting rod may be damaged. Can be prevented.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a lifting / lowering support device according to the present invention will be described below in detail with reference to the drawings.

FIG. 4 is a schematic view showing the entire boiler jack system to which the lifting / lowering support device of the present invention is applied. In FIG. 4, the boiler steel frame 4 constituting the boiler room
A work floor 42 is formed in the upper portion of the work floor 0. A control panel 44 and a hydraulic unit 46 for driving a boiler jack, which will be described later, are installed on the work floor 42, and are operated by an operator 48. An operation panel 50 is provided. In addition, the work floor 42 is provided with a rod storage box 54 for storing the rod 52S constituting the suspension rod 52. A boiler-side steel frame 58 for raising and lowering the boiler module 56, which is a load, is installed adjacent to the boiler steel frame 40.

The boiler module 56 is supported and raised and lowered by a boiler jack 60 which is a center-hole type hydraulic jack, which will be described in detail later, via a suspension rod 52 in which a plurality of rods 52S are screwed and connected in the axial direction. Has become. That is, an upper frame 64 is provided at the upper end of the column 62 of the boiler side steel frame 58, and a boiler jack 60 is installed on the upper frame 64, and chucks provided above and below the boiler jack 60 are alternately arranged. By operating the boiler module 56 via the suspension rod 52, the boiler module 56 can be moved up and down.

Above the boiler jack 60, an automatic rod attachment / detachment device 68 is provided via a frame 66.
The uppermost (tip) rod unit 52S1 located above the boiler jack 60 is removed from the rod unit 52S2 below it, or the rod unit 52S2 is attached to the rod unit 52S2.
1 can be connected. In addition, below the rod automatic attachment / detachment device 68 on the side opposite to the boiler jack 60 side, the rod unit 52S removed by the attachment / detachment device 68 is transported and stored in the rod storage box 54 provided on the work floor 42,
A rod transporting device 70 for transferring the rod 52S stored in the rod storage box 54 to the automatic rod attaching / detaching device 68.
Is provided.

The boiler module 56 is fixed to a lower part of a girder 500 made of I-beam shown in FIGS. 1 to 3 supported by a plurality of boiler jacks 60. As shown in FIG. 3, for example, the pair of girders 500 are arranged in parallel, and when lifted to a predetermined height by the boiler jack 60 via the hanging rod 52, the lower surface of the jack mounting beam 502 on which the boiler jack 60 is fixedly installed. In the state where the boiler module 56 is suspended,
4 to be fixed. A jack mounting beam 502 to which each girder 500 is fixed has a work floor 406 provided with a handrail 504 on a side portion, and one girder 50 is also provided.
0 is fixed to the jack mounting beam 502 and the other large beam 50
0 is fixed to the jack mounting beam 502 to which the connecting floor 5 is connected.
08, so that the jack mounting beams 502 can be moved back and forth. A handrail 510 is provided on the side of the connecting floor 508 to prevent a fall accident of the worker.

When raising and lowering the boiler module 56 fixed to the lower part of the girder 500, the balance device 5 provided at the lower end of the suspension rod 52 supported by the boiler jack 60
12 supports both ends of the girder 500. In this embodiment, a balance device 512 is arranged at both ends of each girder 500, and the boiler module 5
6 is moved up and down. Each balance device 512
It has an upper balance beam 516, which is a pair of auxiliary balance beams pivotally attached to a suspension plate 514, which will be described in detail later, and a lower balance beam 518 located below the balance beam.

The upper balance beam 516 and the lower balance beam 518 are orthogonally arranged. A pair of suspension plates 514 supporting both ends of the lower balance beam 518 are attached to the large beam 50.
The lower balance beam 518, which is disposed on both sides of the suspension plate 0 and is pivotally connected to the lower portion of the suspension plate 514 via the pin 522, is located below the girder 500, and is pivotally mounted to the upper portion of the suspension plate 514 via the pin 520. Pair of upper balance beams 516
Are located on both sides of the girder 500. Further, as shown in FIG. 1, each upper balance beam 516 has a hanging rod 52 that supports a pair of boiler jacks 60 (for example, boiler jacks 60A and 60B) whose longitudinal ends are arranged in the longitudinal direction of the girder 500. Is swingably supported at the lower end. On the other hand, the pins 520 and 522 that pivotally connect the respective balance beams 516 and 518 to the suspension plate 514 are prevented from coming off by the key plate 524 as shown for the pin 522 in FIG.

As shown in FIG. 1, the lower balance beam 518 has a top plate 526 and a bottom plate 528, and a pair of side plates 530 connecting the top plate 526 and the bottom plate 528. The lower part of the suspension plate 514 is inserted between the side plate 530 and the suspension plate 514.
Are connected by a pin 522. Also, the side plate 53
0, the top plate 526 and the bottom plate 52
8, a plurality of reinforcing plates 532 are provided. Further, a girder 500 is provided at the center of the upper surface of the lower balance beam 518.
A load receiving mechanism 534 is provided to support the load of the boiler module 56 acting via the load (see FIG. 2).

As shown in FIG. 5, the load supporting mechanism 534 has a spherical seat 536 fixed to the top plate 526 of the lower balance beam 518 by bolts. This spherical seat 536
The bearing surface of the receiving seat 540 attached to the lower surface of the girder 500 via the mounting plate 538 abuts on the seating surface formed on the upper spherical surface, and the bearing girder 500 and the boiler module 56 While supporting the load, the girder 500
Allows for tilting back and forth, left and right. Further, the lower balance beam 518 is provided with a restricting ring 542 around the spherical seat 536 for preventing a displacement between the two seats. The restricting ring 542 is attached to the top plate 526 by a fixing bolt 545 that penetrates a fool hole 544 formed in the top plate 526, and the upper end can be brought into contact with the attachment plate 538 on the girder 500 side. A cushioning material 546 is provided between the restricting ring 542 and the top plate 526 so that the receiving seat 540 can surely contact the spherical seat 536 and the transmission from the beam 500 side. It is designed to be able to absorb the shocks that occur. Further, on the outer side of the restricting ring 542, a restricting bolt 549 attached via a bracket 548 has a tip disposed toward the restricting ring 542 to prevent the restricting ring 542 from being displaced.

The suspension plate 514 for pivotally connecting the upper balance beam 516 and the lower balance beam 518 includes a pair of upper plates 56.
8 and a pair of lower plates 570 are main components.
The upper plate 568 has an upper end portion formed in a semicircular shape and is opposed to each other. Further, the lower plate 570 has a narrow portion 572 at the upper portion and a scoop-like shape having a lower end portion formed in a semicircular shape, and the narrow portion 572 is provided between the pair of upper plates 568 and the upper plate 568. The faces are inserted orthogonally, and the sides are fixed to each upper plate 568. And each upper plate 5
68 and each lower plate 570 have a pin 52
0, 522 and the upper balance beam 516 and the lower balance beam 51
6 are provided with pin holes 574, 576 for pivotal connection. Each upper plate 568 is provided with a ring-shaped reinforcing plate 578 around a pin hole 574 on the outer surface, and a U-shaped hook 580 is attached below the reinforcing plate 578.
On the other hand, a ring-shaped reinforcing plate 582 is fixed to each lower plate 570 around the pin hole 576 on the facing surface.

The upper balance beam 516 has a pair of side plates 584 opposed to each other as shown in FIG. These side plates 584 are mutually connected via a top plate 586 interposed at the upper center between them. And
As shown in FIG. 7 (2), each side plate 584 has a semicircular projection 588 at the lower center in the longitudinal direction.
A pin hole 590 through which the pin 520 can be inserted is formed concentrically with the overhang portion 588. In addition, a rib plate 592 is provided at an appropriate position between the pair of side plates 584 to improve the strength of the upper balance beam 516. Top plate 586
Is formed to be shorter than the side plate 584 and has a semicircular notch 59 for passing the suspension rod 52 at both ends thereof.
4 are provided. On the top surface of the top plate 586, a suspending fitting 596 is provided upright so as to be orthogonal to the side plate 584. A connection hole 598 for connecting a wire or the like is formed in the suspension fitting 596 (see FIG. 8 (2)).

On the other hand, around the pin holes 590 of the side plate 584, auxiliary plates 600, 6 for reinforcing the side plate 584 are provided on the inner and outer surfaces.
02 is provided. Further, a seat plate 604 is fixed below the side plate 584 on both sides of the overhang portion 588. The seat plate 604 is attached across a pair of side plates 584, and a rod hole 606 for penetrating the suspension rod 52 is formed concentrically with the notch 594 of the top plate 586. The lower surface of the seat plate 604 comes into contact with the seat surface of the balance receiving seat 608 through which the suspension rod 52 passes, as shown in FIG.

As shown in FIG. 9A, the balance receiving seat 608 has a square shape in plan view, and has a rod hole 610 through which the hanging rod 52 passes. Further, as shown in FIG. 9B, the balance receiving seat 608 has a bottom surface 612 formed in a flat surface, and a seating surface 614 at the center of the upper surface is in the left-right direction of the upper balance beam 516. It is formed in a circular arc curved in the direction, and the shape in a front view is a semi-cylindrical shape. A cylindrical seat 550 is arranged below the balance receiving seat 608 serving as a rod connecting portion. The cylindrical seat 550 has a seat surface in contact with a nut 551 which is a rod connecting member screwed to a lower end of the suspension rod 52. Therefore, the suspension rod 52 includes the nut 551,
The upper balance beam 5 via the cylindrical seat 550 and the balance receiving seat 608
16 is tiltably supported.

As shown in FIG. 10, the cylindrical seat 550 includes a seat body 552 and a receiving tray 554. The seat main body 552 has a trapezoidal cross section on the lower side of the seat surface, and a through hole 556 through which the hanging rod 52 passes through the center.
Is provided. A flat seating surface 558 is formed around the through hole 556, and an outer edge of the seating surface 558 is an inclined surface 560. On the other hand, the tray 554 has a recessed cross section having a storage portion 562 for receiving the upper portion of the seat body 552, and a through hole 564 having the same diameter as the through hole 556 of the seat body 552 is formed in the center. The ring-shaped edge portion 566 of the tray 554 prevents the seat body 552 from being compressed and expanded in the radial direction by the load applied thereto.
The seat body 552 and the tray 554 are integrated by a plurality of bolts.

In this embodiment, the seat body 552 is formed of brass having a yield point of 2.8 t / cm ² , and the receiving tray 554 is formed of iron or the like having a higher rigidity than brass. Further, a nut 5 serving as a seat on the suspension rod 52 side is provided.
51 is formed of a material having a larger yield point than brass, for example, S45C (steel) having a yield point of 3.6 t / cm ² . Then, the contact area of the seat body 552 with the nut 551, that is, the area of the seat surface 558 is set to 48 cm ² , the maximum design load acting on the seat surface 558 is set to 160t, and the maximum design load is applied. The bearing surface 558 is designed to have a surface pressure of 3.3 t / cm ^{2, which is} between the yield point of brass and the yield point of iron (steel). Therefore, momentary load changes and shocks up to the maximum design load are not
It is used within the range of elastic deformation below the yield point of 50 to absorb momentary load changes and shocks. Also,
When an instantaneous load change or shock exceeding the maximum design load acts on the cylindrical seat 550, the shock is absorbed by utilizing the plastic deformation of the seat body 552.

As shown in FIG. 11, the boiler jack 60 comprises a cylinder 74 as a fixed outer cylinder member provided upright on the upper surface of a box-container-shaped ram chair 72 installed on a jack mounting beam 502, and Ram 7 interpolated into
It consists of six. The cylinder 74 has a double wall structure, and accommodates the ram 76 through an upper opening of a hydraulic chamber formed inside the wall so that the ram 76 can be moved up and down. The hydraulic chamber is a pressing oil chamber 78 formed on the lower end face side of the insertion of the ram 76.
And a return oil chamber 80 formed at a lower end of the ram and formed on the side wall surface of the ram 76. The hydraulic oil is supplied to the press oil chamber 78 to raise the ram 76, The ram 76 can be lowered by opening the chamber 78 and supplying hydraulic oil to the return oil chamber 80.

A center hole 82 is formed in the center of such a boiler jack 60, and a suspension rod 52 is passed through the hole 82, and a connection is made by holding a neck portion formed in the suspension rod 52. While supporting the boiler module 56, the ram 76 is moved up and down with driving. An upper chuck unit 84 is provided at the top end of the ram of the jack 60 to support the rod neck portion, and a lower chuck unit 86 is provided inside the ram chair 72 below the cylinder 74. Details of this are shown in FIGS.

FIG. 12 is a view taken in the direction of arrow A in FIG. 11, and FIG.
2 is a sectional view taken along the line CC of FIG. 2, and FIG.
FIG. 13 is a side view in a state where 00 (see FIG. 12) is removed.
As shown, the upper chuck unit 84 has a rectangular chuck base 88 having an opening formed in the center and fixed to the top end surface of the ram 76. A pair of halved chucks 90 are slidably mounted on the upper surface of the chuck base 88. The chuck 90 is opened and closed at a half portion. In order to regulate the opening and closing direction, an inverted L-shaped slide guide 92 is attached along a pair of opposing edges of the chuck base 88. Both edges of the chuck 90 are engaged. A bracket 94 is fixed to the rear edge of each chuck 90, and hydraulic cylinders 96 for opening and closing the pair of left and right chucks 90 are connected to both ends of the bracket 94. Hydraulic cylinder 96
Are located on the upper surface of the slide guide 92, and are expanded and contracted in the guide direction by the expansion and contraction of the slide guide 92.
0 is opened and closed.

The upper chuck unit 84 includes a semicircular ring-shaped top plate 98 that engages with the neck of the suspension rod 52 when the chuck 90 is closed. That is, the chuck 90 has a semicircular notch slightly larger in diameter than the neck diameter of the suspension rod 52 in a half portion, and a circular opening substantially matching the neck diameter when the chuck is closed on the upper surface. The top plate 98 having a semicircular notch formed therein is fixed.

On the other hand, an inverted L-shaped sensor bracket 100 is fixed to the outer surface of each slide guide 92. The sensor bracket 100 has a tip portion bent downward in an L-shape to be lower than the upper surface of the top plate 98. , A closing sensor 104 for detecting that the chuck 90 is closed. The lower chuck unit 86 is configured similarly to the upper chuck unit 84, except that the unit 86 is installed inside the ram chair 72 and the cylinder 7
The suspension rod 52 can be chucked at the lower part of the hook 4.

Here, the boiler jack 60 according to the embodiment is described.
Is set such that the length of the rod 52S constituting the suspension rod 52 is a unit of the vertical stroke,
For this reason, it is comprised so that it may have an up-and-down stroke more than the length of the rod 52S. First, the hanging rod 5
2 is a rod 52 as shown in FIGS.
A plurality of S are connected in the axial direction to form a long rod. Each rod 52S has a large-diameter head 52B formed at the upper end of a rod 52A and a lower end formed at the lower end of the rod 52A. An external thread portion 52C is provided. Also, the head 52B
Is provided with a female screw part 52D at the center of the end face. Then, by screwing the male screw portion 52C of another rod alone into the female screw portion 52D, a plurality of rod single members 52S can be screwed and connected in the axial direction. The rod 52S has a drop-preventing groove 52E near the upper end of the head 52B that engages with a projection provided on the gripping claw of the suspension rod attaching / detaching device 68.

The hanging rod 52 can be supported by a load by being chucked by the chuck unit.
And the lower chuck unit 86 are connected to the upper rod unit 5.
2S and a plurality of lower rods 52S located at a lower position than the rod 2S can be chucked at the same time, and the load support state of the upper chuck unit 84 can be transferred to the lower chuck unit 86.
Of course, when the ram 76 turns from the lowered position to the raised position,
The transition from the load supporting state by the lower chuck unit 86 to the load supporting state by the upper chuck unit 84 is also possible. This can be realized by setting the lifting stroke of the ram 76 to be slightly larger than the length of the rod 52S.

When the lower chuck unit 86 shifts to the load supporting state of the suspension rod 52, the upper chuck unit 84 is opened to allow the ram 76 to move up and down. It can be attached and detached. However, between the position supported by the lower chuck unit 86 and the uppermost end of the rod, the plurality of rods 52S are in a connected state, and in particular, when the screw connection of the tip rod 52S is to be released and separated, Center hole 8 located below
There is a possibility of loosening of the screw connection portion of the screw 2. Therefore, in the case of the lifting mode in which the boiler module 56 is lifted to remove the rod unit 52, the ram 7
A detent mechanism is provided for braking the rotation between the rod unit 52S2 raised and raised and the rod unit 52S3 (see FIG. 11) protruding from the upper part of the cylinder 74 and then raised.

First, a frame 66 having a ramen structure constructed to stably support the jack 60 in an upright state is disposed around the boiler jack 60 (see FIG. 11). Location is frame 6
6. In such a frame 66, the upper chuck unit 84 tries to chuck the rod 52 at the upper end of the lowered ram 76.
In order to target the single rod 52S2 connected directly above S to the target of the rotation, the rotation prevention mechanism 110 is provided at the cross beam portion 106 provided at the height position of the large diameter head 52B of the single rod 52S2. ing.

As shown in FIG. 15, which is a view taken in the direction of arrow B in FIG.
And a hydraulic cylinder 114 connecting the arms to open and close the distal end portion, and a pressure block 116 provided at the open / close distal end portion allows the rod 52S2
Of the large-diameter head 52B. The swivel arm 112 has a cross beam 1 in the middle so that the pressure block 116 is opened and closed at the position of the axis of the boiler jack 60.
06 on a mounting beam 118 arranged in parallel with
And the hydraulic cylinder 114
The end on the side is slid in the cross beam part 106 so that it can be turned horizontally. As a result, the pair of swing arms 112 are guided by the mounting beam 118 and the cross beam portion 106 so as to be horizontally swingable, while the hydraulic cylinder 114 is
The large-diameter head 52B is pinched by the driving force of
It is intended to realize the rotation stop.

A pair of beams 122, 1 on both sides of the swivel arm 112 of the cross beam portion 106 where the mounting beam 118 passes.
In 23, a detachable sensor 124 is provided at a position corresponding to the pressure block 116. The attachment / detachment sensor 124 includes four pairs of optical sensors 124A to 124D that are arranged to face each other, and can detect the separation and connection of the rods 52S constituting the suspension rod 52. That is, as shown in FIG. 16, the detachable sensor 124 is configured such that the sensors 124A to 124C
The rod 52S is disposed at a position substantially equal to the distal end surface of the head 52B of the rod 52S gripped. The sensor 124B is located at the center of the rod 52S in the diameter direction, and the sensors 124A and 124C are located on both sides of the rod 5S.
The 2S male screw portion 52C is arranged at a position where it can be detected, and the light-emitting portion and the light-receiving portion of these sensors 124A to 124C are shielded from light and turned off to detect that the rod 52S is connected. I can do it. Further, the sensor 124D is located immediately above the sensor 124B, and when the rod 152S is removed, the light receiving unit receives light from the light emitting unit and turns on, and detects that the rod 52S is completely separated. I can do it.

At the rear end side of the swivel arm 112 of the mounting beam 118, a sensor beam 126 is disposed parallel to the mounting beam 118. FIG. 17 is a cross-sectional view taken along line FF of FIG.
As shown in (1), the sensor beam 126 is located below the swing arm 112, and as shown in FIG. 17 (2) which is a cross-sectional view taken along line GG of FIG.
Four inverted L-shaped brackets 128 are fixed. The pressure block 11 is provided on the upper surface of the bracket 128.
A brake detection sensor 132 for detecting that the rod 6 has clamped the rod 52S and a brake release sensor 130 for detecting that the clamp has been released by the pressure block 116 are attached.

Further, the provision of the above-described rotation stop mechanism 110 enables automatic attachment and detachment of the single rod 52S1. FIG. 18 shows this configuration example. As shown, a transverse frame 264 is attached to a main frame 266 provided above the two boiler jack devices. A traverse drive shaft 134 composed of a screw shaft is installed on the traverse flakes 264, and a traverse motor 268 connected to one end of the traverse drive shaft 134 is driven to guide the traverse drive shaft 134 so as to be adjacent thereto. An automatic rod attachment / detachment device 68 capable of moving the position is provided above any of the boiler jack devices. The attachment / detachment device 68 is configured such that the attachment / detachment chuck 140 provided at the lower end of the rotation unit 138 can be rotated by a rotation motor 142 formed of a servomotor, and the rotation unit 138 can be moved up and down by an elevation motor 144 formed of a servomotor. It is. After the attachment / detachment device 68 is stopped immediately above one of the boiler-jack devices, it is moved down to grasp the large-diameter head 52B of the tip rod 52S1 directly above the rod 52S2 to which braking is applied. By rotating the screw so as to release the screw connection, the rod unit 52S1 at the end can be removed, and the removed rod unit 52S1 can be transferred to the rod transfer device 70. Conversely, the rod 52S is suspended from the hanging rod 5S.
In the case of the lowering mode in which the rod 2 is connected, the automatic rod attaching / detaching device 68 chucks the rod 52S1 to be connected, which is transported by the rod transporting device 70, and carries the rod 52S1 to the coupling position, where braking is applied. Rod alone 52S
The connection is made by rotating the screw 2 so as to tighten it.

The operation of the boiler-jack device configured as above will be described with reference to a schematic diagram of FIG. In the initial state, the lower chuck unit 86 is in a closed state as shown in FIG.
The suspending rod 52 suspending the boiler module 56 is supported by the lower chuck unit 86. When raising the boiler module 56, the upper chuck unit 84 is first closed and the ram 76 of the jack 60 is raised, and as shown in FIG. 5
After shifting to 6, the lower chuck unit 86 is opened.

Thereafter, by continuing to drive the ram 76 upward until the ram 76 reaches the rising end, the rod unit 52S on which the upper chuck unit 84 is chucking is held.
The second large-diameter head 52B reaches the operating position of the rotation stopping mechanism 110 (FIG. 3C). After the ram 76 reaches the rising end,
By closing the lower chuck unit 86 and lowering the ram 76, the load of the suspension rod 52 is transferred to the lower chuck unit 58 side. This is when ram 76 is 10
It can be confirmed by detecting a drop of about several millimeters. By this load transfer, the rotation stopping mechanism 110 is operated, and the second rod 52S2 from the foremost end is braked. As a result, the lower chuck unit 86 serving as a load bearing portion and the rod 52S2 being braked alone
Even if there are a plurality of rod connecting portions between them, the rod rotation at this portion is prevented. Therefore, as shown in FIG. 4D, the release operation of the most advanced rod unit 52S1 higher than the braked rod unit 52S2 is performed, and at the same time, the ram 76 starts to move downward and reaches the next ascending drive start position. It will return.

Although the rod releasing operation can be performed manually,
The above-mentioned rod automatic attachment / detachment device 68 allows the rod 52
S1 is raised while being rotationally driven in the unscrewing direction, and is separated as shown in FIG.
0, and may be carried into the rod storage box 54 by the rod transfer device 70. At the end of this operation, the ram 76 is in the starting state of the next ascent operation, and the operations (1) to (5) shown in the figure may be repeated thereafter. On the other hand, in the case of the descending mode, the rod 52S transported by the rod transporting device 70 is attached to the rod automatic attaching / detaching device 68.
Thus, the work may be carried over the hanging rod 52 and the operation following the steps (5) to (1) substantially reverse to the case shown in FIG. 19 may be performed.

The lifting and lowering of the boiler module 56 via the suspension rods 52 is performed by controlling by a control device (not shown) so that the stroke displacement of each boiler jack 60 becomes uniform. However, when the stroke displacement of each of the boiler jacks 60 is not uniform due to a variation in output due to a manufacturing error or the like between the respective boiler jack devices, and a difference is generated between the lifting and lowering speeds between the plurality of suspension rods 52, the difference is measured by the balance device 512. To prevent a large bending moment from acting on the suspension rod 52,
Can be avoided.

That is, in the ascending mode, for example, a difference occurs in the ascending speed of the ram 76 of the boiler jacks 60A and 60B supporting the upper balance beam 516 via the suspension rod 52, and the boiler jack 60B When the rod lifting speed is higher than that of the boiler jack 60A, the upper balance beam 516 rotates clockwise in FIG. The upper balance beam 516 is pivotally attached to the suspension plate 514, and a cylindrical seat 550 and a balance receiving seat 608 are arranged between the nut 551 of the suspension rod 52, which is a connecting tool, and the upper balance 516. Since the upper balance beam 516 is supported via the cylindrical seat 550 and the balance receiving seat 608, the upper balance beam 516 is provided.
Is inclined, the inclination is absorbed by the cylindrical seat 550 and the balance receiving seat 608, so that even if the upper balance 516 is inclined, it is possible to prevent a large bending stress from acting on the suspension rod 52. Therefore, the swinging of the suspension rod 52 can be prevented, and the suspension rod 52 bends and the rod 52
It is possible to prevent the removal of S from becoming difficult and the rod 52S from becoming unusable. The same applies to the descending mode.

Further, when there is a difference in the ascending speed between both ends in the longitudinal direction of the girder 500 or between the left and right sides, ie, FIG.
Boiler jack 60A side and boiler jack 60 shown in FIG.
If there is a difference in the ascending speed between the suspension rods 52 on the C side or both ends in the direction perpendicular to the plane of FIG. 1, this speed difference is caused by the load receiving mechanism provided between the lower balance beam 518 and the large beam 500. 534. For example, when the rising speed of the rod 52 on the boiler jack 60A side is higher than the rising speed of the suspension rod 52 on the boiler jack 60C side, the lower balance beam 518 supports the large beam 500 via the receiving seat 540. 536 rotates clockwise in FIG. At this time, the spherical seat 53
The restricting ring 542 disposed around the periphery of the cushioning material 5
Since it was attached to the lower balance beam 518 via 46,
The lifted side of the lower balance beam 518 elastically deforms and sinks, allowing the lower balance beam 518 to rotate. Since the lower balance beam 518 is pivotally connected to the suspension plate 514 attached to the lower end of the suspension rod 52 via the pin 522, the suspension rod 52 is subjected to bending stress so that the shaft deflection of the suspension rod 52. Without causing
The suspension rod 52 is prevented from being damaged. The same applies to a case where a difference occurs in the ascending speed in the longitudinal direction of the girder 500,
The same applies to the descending mode.

When a deviation greater than a predetermined value occurs between the stroke displacements of the boiler jacks, the control device reduces the output of the boiler jacks having a large stroke displacement to reduce the stroke of each boiler jack. Adjust the lifting speed so that it is even.

FIG. 20 to FIG. 22 show another embodiment. In these figures, the steel frame 61
6 is provided on a base frame 617, and a pair of cross beams 61 is provided between a pair of horizontal beams 618 provided on the base frame 617.
9 is fixed. And, on each bridge beam 619,
Two pairs of jack mounting beams 502 are provided for each of the bridge beams 61.
9, hydraulic jacks 620A to 620A are provided at both ends of the jack mounting beam 502, respectively.
0P (hydraulic jacks 620M to 620P are not shown) is attached. These hydraulic jacks 620 (hydraulic jacks 620A to 620P) have a suspension rod 52 inside.
Is a center-hole type jack constructed in the same manner as the above-mentioned boiler jack 60, which penetrates and raises and lowers the lifting object 624 via the suspension rod 52.

Each hydraulic jack 620 is provided with a hydraulic jack 6.
20A to 620D, hydraulic jacks 620E to 620H,
Hydraulic jacks 620I to 620L, hydraulic jack 620
M to 620P form a set, and each of the weighing devices 512A to 512D (the weighing device 5
12D is floatingly supported. Each of the balance devices 512A to 512D supports a load receiving frame 626 on which a lifting object 624 such as a steel plate or a material is disposed at an upper portion.

The load receiving frame 626 includes a pair of weight beams 628 arranged in parallel, and a pair of parallel intermediate beams 630 fixed orthogonally on the pair of weight beams 628.
It is composed of a plurality of parallel load receiving beams 632 that are orthogonally arranged and fixed above these intermediate beams 630. Each weight beam 628 is provided with a balance device 512 at each end, and is supported by a pair of balance devices 512. At the center of the lower balance beam 518 of each balance device 512, a load receiving mechanism 534 having the above-described spherical seat 536 is provided.
The weight beam 628 is supported via 34.

In this embodiment constructed as described above, the output of each of the hydraulic jacks 620A to 620P is controlled by the control device so that the displacement of the lifting stroke of each jack becomes uniform. Then, when there is a difference between the lifting speeds of the jacks, the balance device 512 as described above.
Thus, the shaft runout of the suspension rod 52 is absorbed, and damage to the suspension rod 52 can be avoided.

[0053]

As described above, according to the present invention, a cylindrical seat is provided at a connecting portion between a suspension rod and a lifting object, and the cylindrical seat and another seat surface abutting on the cylindrical seat are yielded. It is formed of materials with different points, and by setting the surface pressure of the seat surface at the maximum design load to the middle of the yield point of each seat, instantaneous load changes and shocks within the maximum design load range are reduced. It is absorbed by the elastic deformation of each seat. In addition, if there is an instantaneous load change or shock that exceeds the maximum design load, the seat with a low yield point is plastically deformed and absorbs the load change and shock, so the moment transmitted to the suspension rod is reduced. Thus, the load change and the shock can be reduced, and the damage to the suspension rod and the load on the jack supporting the suspension rod can be reduced.

In addition, by supporting the lifting object with the suspension rod via the balance beam, if there is a difference in the amount of lifting and lowering between the jacks, the difference can be more easily absorbed by the swing of the balance beam. Therefore, it is possible to prevent a large bending stress from acting on the suspension rod, and prevent the suspension rod from being deformed such as swinging or bending. further,
By providing an auxiliary balance beam on the balance beam and supporting the balance beam via the auxiliary balance beam with the hanging rod, when supporting a heavy lifting object by a plurality of balance beams,
Even if there is a difference in the amount of lifting and lowering between the jacks and the lifting object tilts in any direction, the lifting beam is absorbed by the balance beam and the auxiliary balance beam, and the lifting rod is bent. Can be prevented from being damaged.

[Brief description of the drawings]

FIG. 1 is a side view of a lifting / lowering support device according to an embodiment of the present invention.

FIG. 2 is a front view of the lifting / lowering support device according to the embodiment;

FIG. 3 is a diagram showing an arrangement of boiler jacks as viewed from the front side of the lifting / lowering support device according to the embodiment;

FIG. 4 is a schematic diagram illustrating an entire boiler jack system to which the lifting device according to the embodiment is applied.

FIG. 5 is a partial cross-sectional view of a load receiving mechanism provided between the balance device and the girder according to the embodiment.

FIG. 6 is a detailed explanatory view of a suspension plate for pivotally mounting a balance beam of the balance device according to the embodiment;

FIG. 7 is a plan view, a front view, and a bottom view of an upper balance beam included in the balance device according to the embodiment;

FIG. 8 is a transverse sectional view and a longitudinal sectional view of the upper balance beam according to the embodiment.

FIG. 9 is a plan view and a front view of a balance receiving seat according to the embodiment.

FIG. 10 is a partial sectional view showing details of a cylindrical seat according to the embodiment.

FIG. 11 is a partial cross-sectional side view of the boiler jack device according to the embodiment.

12 is a plan view of the upper chuck unit according to the embodiment, as viewed in the direction of arrow A in FIG. 11;

FIG. 13 is a sectional view taken along line CC of FIG. 12;

FIG. 14 is a side view of the upper chuck unit according to the embodiment with the sensor bracket removed.

FIG. 15 is a plan view of the rotation stopping mechanism, as viewed in the direction of arrow B in FIG. 11;

FIG. 16 is a view taken in the direction of arrows along the line DD in FIG. 15;

FIG. 17 is a sectional view taken along lines FF and GG in FIG. 15;

FIG. 18 is an assembly configuration diagram of the boiler jack device and the automatic rod attaching / detaching device according to the embodiment.

FIG. 19 is a schematic diagram illustrating a method of lifting and lowering the suspension rod according to the embodiment.

FIG. 20 is a front view of another example of the lifting device including the lifting object lifting / lowering support device according to the embodiment.

FIG. 21 is a side view of another example of the lifting device including the lifting object lifting / lowering support device according to the embodiment.

FIG. 22 is a partial plan view of another example of the lifting device including the lifting object lifting / lowering support device according to the embodiment.

FIG. 23 is a plan view and a front view of a rod alone according to a conventional example.

FIG. 24 is an explanatory view of a lifting state of a boiler module by a suspension rod.

FIG. 25 is an explanatory view of a conventional lifting method using a hanging rod.

[Explanation of symbols]

 52 Suspended rod 52S Rod alone 56 Lifted material (boiler module) 60 Boiler jack 68 Automatic rod attachment / detachment device 70 Rod transport device 84 Upper chuck unit 86 Lower chuck unit 110 Detent mechanism 500 Large beam 512 Balance device 516 Auxiliary balance (upper balance) Beam 518 Balance beam 534 Load receiving mechanism 536 Spherical seat 550 Cylindrical seat 551 Rod connector (nut) 608 Balance receiving seat

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hideo Koide 1-1-1 Uchikanda, Chiyoda-ku, Tokyo Inside Hitachi Plant Construction Co., Ltd. (56) References JP-A-5-132294 (JP, A) 56-167,861 (JP, A) 6-59,400 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B66F 1/04-1/08

Claims (5)

(57) [Claims] 1. A lifting object lifting and lowering support device for suspending a lifting object by a suspension rod and lifting the lifting object by a lifting object jack provided on the suspension rod, wherein the lifting rod and the lifting object are lifted. A cylindrical seat is provided on one of the connecting portions, and the cylindrical seat and another seat surface abutting on the cylindrical seat are formed of materials having different yield points. A lifting / lowering support device for a lifting object, wherein the lifting / lowering device is set at an intermediate position between the yield points of the seats. 2. A lifting object lifting and lowering support device, wherein a lifting object is suspended by a plurality of hanging rods, and the lifting object is lifted and lowered by a plurality of lifting jacks provided for each of the hanging rods. A balance beam is arranged on the lower surface of the lifting object, and a seat surface for supporting a load is formed at a portion facing the balance beam and a support point of the lifting object. A lifting object lifting and lowering device, wherein the beam is swingable, and the balance beam is provided with connecting portions of the hanging rods on both sides of the spherical seat. 3. A connecting portion of the suspension rod to the balance beam, wherein a cylindrical seat is provided between a lower surface of the balance beam and a rod connector,
3. The lifting device according to claim 2, wherein the swinging displacement of the balance beam can be absorbed by the cylindrical seat. 4. A lifting object lifting and lowering support device for suspending a lifting object by a lifting rod and lifting the lifting object by a lifting jack provided for each of the lifting rods. A balance beam is arranged on the lower surface, and a seat surface for supporting a load is formed at a portion facing the balance beam and the support point of the lifting object, and the balance beam can be swung with at least one of the seats as a spherical seat. The balance beam is provided with auxiliary balance beams serving as connecting portions of the suspending rods on both sides of the spherical seat, and the suspending rod is inserted through the auxiliary balance beam, and a connecting member of the suspending rod and the auxiliary balance beam are provided. A lifting member lifting and lowering support device, wherein a cylindrical seat is provided between the lifting member and a lower surface of the lifting member so as to be able to absorb the shaft runout of the suspension rod. 5. The cylindrical seat and another seat surface which is in contact with the cylindrical seat are formed of materials having different yield points, and the surface pressure of the seat surface at the maximum design load is set between the yield points of the respective seats. The lifting and lowering support device according to claim 4, wherein the lifting device is set to: