JPH09278384A - Lifted material elevation supporting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce shock or the like from the lifted material side transmitted to a suspension rod. SOLUTION: A balance device 512 has a pair of rehanging plates 514 arranged on both sides of a girder 500 suspending lifted material. An upper balance beam 516 is pivotally fixed to the upper part of the rehanging plates 514 parallelly with the girder 500, and a lower balance beam is pivotally fixed to the lower part of the rehanging plates 514 orthogonally to the girder 500. The lower balance beam supports the girder 500 through a speherical seat. The upper balance beam 516 is supported on a suspension rod 52 elevated by boiler jacks 60A, 60B. A balance receiving seat 608 brought into contact with a seat plate 604, and a cylindrical seat 550 interposed between the balance receiving seat 608 and a nut 551 screwed with the suspension rod are disposed at the lower part of the upper balance beam 516 so as to be able to absorb the inclination of the upper balance beam 516.

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 device and a suspension rod connecting method, and attaches / detaches a suspension rod used for lifting and lowering a boiler module of a large-scale power plant in accordance with lifting using a jack. The present invention relates to a suspension rod attaching / detaching device and a suspension rod raising / lowering method suitable for

[0002]

2. Description of the Related Art FIG. 23 shows a conventional suspension rod used to lift a heavy object, for example, when installing a power generation facility. The suspension rod 10 has a long length by axially screwing a plurality of rod units 10S together,
It is used to suspend a steel module from a beam at a high position and gradually raise the boiler module on which the piping equipment and the like are assembled on the ground according to the assembly situation, or lower it as necessary. A single rod 10S, which is an element constituting such a hanging rod 10, has a shape in which a plurality of frame-shaped support portions 12 are continuously arranged in the axial direction,
A male screw portion 14 is formed at one end, and a female screw portion 16 that is screwed with a male screw portion of another rod is provided at the other end. The suspension rod 10 configured as described above has a unit length of about 5 m in consideration of a storage location problem, convenience for transportation between work sites, handleability, workability in lifting heavy objects, and the like. It is formed to the length of. When the hanging rod 10 is used, a plurality of rod units 10S are axially connected to each other by screwing, and a heavy object is hung in a lower portion and can be lifted by a jack.

That is, as shown in FIG. 24, a steel frame column 22 is installed around the heavy structure 20.
A temporary beam 24 is projectingly provided on the upper part of the above, a center hole type jack 26 is arranged on the beam 24, and a hanging rod 10 having a structure 20 such as a boiler module attached to a lower end thereof is supported. The suspension rod 10 is configured by connecting the suspension rod single body 10S shown in FIG. 23, which is commensurate with the lifting height of the structure 20. The center hole type jack 26 is
As shown in FIG. 25, the support portion 12 provided on the rod 10
The hanging rod 10 is pushed up via the 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 arranged inside the cylinder 30, and the axis of the suspension rod 10 is connected to the upper part of the ram 32 and the lower part of the cylinder 30. An upper chuck 34 and a lower chuck 36, which slide in orthogonal directions, are provided. The chucks 34, 36 support the lifting rod 10 and push it upward to lift the structure 20.

In the lifting procedure, as shown in FIG. 25 (1), first, the suspension rod 10 on which the structure 20 is suspended is supported by the upper chuck 34, and the load of the structure 20 is received by the upper chuck 34. , Lower chuck 36 is opened. Then, in this state, the ram 32 is operated to push up the suspension rod 10 by one frame (one support portion 12), and the structure 20 is suspended via the suspension rod 10.
Next, when the suspension rod 10 rises by one frame, the lower chuck 36 is closed, the ram 32 is lowered, and the lower chuck 36 receives a lifting load (suspension load) via the support portion 12. Once the lower chuck 36 has supported the suspension rod 10, the upper chuck 34 is opened and the ram 32 is lowered further. Then, when the upper chuck 34 comes under the supporting portion which is one lower than the supporting portion that has been supporting until now, the upper chuck 34 is closed again, the suspension rod 10 is supported by the upper chuck 34, and the lower chuck 36 is fixed. Open and repeat the above operation. In this way, rod 1
When the mutual connecting positions of 0 are raised to the upper part of the center hole type jack 26, the lifting work is temporarily stopped and the rod unit 10S on the upper part is removed.

In order to remove the hanging rod 10, the rod unit 10S is first removed by a device such as a crane so that the rod unit 10S to be removed does not fall or drop.
After holding S, the upper rod unit 10S that 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. Then, the removed rod unit 10S is temporarily stored on the temporary beam 24 on which the center hole type jack 26 is installed by a device such as a crane, or is dropped on the ground and stored.

[0007]

By the way, in the conventional lifting / lowering support device for the lifted object via the hanging rod 10, the load of the lifted object acts directly on the hanging rod. When a heavy load undergoes a large load change or a shock is applied, the load change or shock is directly transmitted to the suspension rod 10, which damages the suspension rod or causes a large load fluctuation in the jack 26 supporting the suspension rod. Is not preferable because of the action. Furthermore, even if multiple jacks are controlled in synchronism, it is difficult to make the stroke displacement of each jack uniform due to the manufacturing error between the jacks and oil leaks. The lifting rod tilts due to the difference in the
A large bending stress acts on the hanging rod to cause bending deformation, which makes it difficult to remove the single rod 10S or makes it unusable.

The present invention has been made in order to solve the above-mentioned drawbacks of the prior art, and it is an object of the present invention to provide a lifting object lifting / lowering supporting device capable of reducing a shock or the like from the lifting object side transmitted to a hanging rod. Has an aim. It is another object of the present invention to provide a lifting object lifting / lowering supporting device which does not damage the hanging rod even if a difference in lifting amount occurs between the plurality of jacks.

[0009]

In order to achieve the above object, a lifting / lowering support device according to the present invention hangs a lifting / lowering object with a hanging rod, and a lifting / lowering jack provided on the hanging rod. A lifting object lifting and lowering supporting 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 against the cylindrical seat. Are made of materials having different yield points, and the surface pressure of the seat surface at the maximum design load is set to the middle of the yield points of the seats.

Further, the lifting / lowering support device according to the present invention comprises:
A lifting object lifting and lowering supporting device for hanging a lifting object with a plurality of hanging rods and lifting and lowering the lifting object with a plurality of lifting object jacks provided for each hanging rod. A balance beam is arranged on the lower surface, and a seat surface that bears a load is formed at the facing portion of this balance beam and the supporting point of the lifting object, and at least one seat can be used as a spherical seat to swing the balance beam. Further, the balance beam is provided with connecting portions of the hanging rods on both sides of the spherical seat. It is preferable that a cylindrical seat is provided between the lower surface of the balance beam and the rod connecting tool at the 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, the lifting / lowering support device according to the present invention lifts / lifts a lifting object by a lifting rod, and lifts / lowers the lifting object by lifting jacks provided for each lifting rod. A supporting device, in which a balance beam is arranged on the lower surface of the lifting object, and a seating surface for bearing a load is formed on the facing portion of the balance beam and the supporting point of the lifting object, and at least one seat Is used as a spherical seat to allow the balance beam to swing, and the balance beam is provided with an auxiliary balance beam that forms a connecting portion of the suspension rods on both sides of the spherical seat, and the suspension rod is inserted into 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 to absorb the axial runout of the suspension rod. The cylindrical seat and the other seat surface that is in contact with the cylindrical seat are made of materials having different yield points, and the surface pressure of the seat surface at the maximum design load is set to the middle of the yield points of the seats.

[0012]

According to the above construction, the cylindrical seat is provided at the connecting portion between the suspension rod and the lifting object, and the cylindrical seat and the other seat surface abutting on the cylindrical seat are made of materials having different yield points. By setting the surface pressure of the seat surface under the design load to the middle of the yield points of the seats, the instantaneous load change and shock within the maximum design load range are absorbed by the elastic deformation of the seats. . In addition, when there is an instantaneous load change or shock that exceeds the maximum design load, the seat with a low yield point plastically deforms and absorbs the load change and shock, so the moment it is transmitted to the suspension rod. It is possible to reduce a change in the load and a shock, and to reduce the damage to the suspension rod and the load on the jack supporting the suspension rod.

Further, by supporting the lifted object by the suspension rod via the balance beam, when there is a difference in the amount of elevation between the jacks, the difference can be more easily absorbed by the swing of the balance beam. You can Therefore, even if the lifted object is tilted, it is possible to prevent a large bending stress from being applied to the suspension rod, and it is possible to prevent deformation of the suspension rod such as axial wobbling or bending. Furthermore, when an auxiliary balance beam is provided on the balance beam and the balance beam is supported by the suspension rod via this auxiliary balance beam, when a heavy load is supported by a plurality of balance beams, the space between the jacks is increased. Even if there is a difference in the amount of vertical movement and the lift is tilted in any direction, the balance beam and the auxiliary balance beam absorb the tilt of the lift and the suspension rod bends and the suspension rod is damaged. Can be prevented.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a lifting / lowering support device according to the present invention will be described in detail below 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, a boiler steel frame 4 constituting a boiler chamber
A work floor 42 is formed on the upper part of 0, and a control panel 44 and a hydraulic unit 46 for driving a boiler jack described later are installed on the work floor 42 and 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 a single rod 52S that constitutes the hanging rod 52. Further, a boiler side steel frame 58 for moving up and down the boiler module 56, which is a lift, is installed adjacent to the boiler steel frame 40.

The boiler module 56 is supported and moved up and down 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 rod units 52S are screwed and connected in an axial direction. Has become. That is, the upper frame 64 is provided at the upper end of the pillar 62 of the boiler side steel frame 58, and the boiler jack 60 is installed on the upper frame 64. The chucks provided above and below the boiler jack 60 are alternately arranged. It is possible to support and raise and lower the boiler module 56 via the suspension rod 52 by operating the above.

An automatic rod attaching / detaching device 68 is provided above the boiler jack 60 via a frame 66.
The uppermost (tip) rod unit 52S1 located above the boiler jack 60 may be removed from the rod unit 52S2 below it, or the rod unit 52S2 may be attached to the rod unit 52S2.
1 can be connected. In addition, below the side opposite to the boiler jack 60 side of the automatic rod attaching / detaching device 68, the rod unit 52S detached by the attaching / detaching device 68 is conveyed and stored in a rod storage box 54 provided on the work floor 42,
A rod transport device 70 for passing the rod single body 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 the lower portion of the girder 500 made of the I-shaped steel shown in FIGS. 1 to 3 and supported by a plurality of boiler jacks 60. As shown in FIG. 3, for example, a pair of large beams 500 are arranged in parallel, and when they are hoisted to a predetermined height by a boiler jack 60 via a hanging rod 52, the lower surface of a jack mounting beam 502 on which the boiler jack 60 is fixedly installed. In the state where the boiler module 56 is suspended,
It is fixed through 4. The jack mounting beam 502 to which each girder 500 is fixed is provided with a work floor 406 having a handrail 504 on a side portion, and one girder 50 is provided.
Jack mounting beam 502 to which 0 is fixed and the other girder 50
Connecting floor 5 between jack mounting beam 502 to which 0 is fixed
They are connected to each other by means of 08 so that these jack mounting beams 502 can be moved back and forth. A handrail 510 is provided on a side portion of the connecting floor 508 to prevent a worker's fall accident.

When the boiler module 56 fixed to the lower part of the girder 500 is raised and lowered, the balance device 5 provided at the lower end of the suspension rod 52 supported by the boiler jack 60.
Both ends of the girder 500 are supported by twelve. In this embodiment, the balance devices 512 are arranged at both ends of each girder 500, and the boiler module 5 is
I am going to raise and lower 6. 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 upper balance beam 516.

The upper balance beam 516 and the lower balance beam 518 are arranged orthogonally. Then, the pair of suspension plates 514 supporting the both ends of the lower balance beam 518 are connected to the girder 50.
The lower balance beam 518, which is arranged on both sides of 0 and is pivotally attached to the lower portion of the suspension plate 514 via the pin 522, is located below the cross beam 500, and is pivotally attached 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 suspension rod 52 supported by a pair of boiler jacks 60 (for example, boiler jacks 60A, 60B) whose longitudinal ends are arranged in the longitudinal direction of the girder 500. It is swingably supported at the lower end of. On the other hand, the pins 520 and 522, which pivotally attach the respective balance beams 516 and 518 to the suspension plate 514, are prevented from coming off by a 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, and the pair of side plates 530. The lower part of the suspension plate 514 is inserted between the side plate 530 and the suspension plate 514.
And are connected by a pin 522. Also, the side plate 53
0 at an appropriate position in the longitudinal direction, the top plate 526 and the bottom plate 52
8, a plurality of reinforcing plates 532 provided between them are provided. Further, in the central portion of the upper surface of the lower balance beam 518, the large beam 500
There is provided a load receiving mechanism 534 for supporting the load of the boiler module 56 acting via the load module (see FIG. 2).

The load support mechanism 534, as shown in FIG. 5, has a spherical seat 536 fixed to the top plate 526 of the lower balance beam 518 with bolts. This spherical seat 536
The seat surface of the receiving seat 540, which is attached to the lower surface of the girder 500 via the mounting plate 538, abuts the seat surface formed on the spherical surface of the upper part, and the large beam 500 and the boiler module 56 are connected via the receiving seat 540. Supports load and crossbeam 500
It allows you to lean back and forth and left and right. Further, the lower balance beam 518 is provided with a restriction ring 542 around the spherical seat 536 for preventing the displacement between the two seats. The restriction ring 542 is attached to the top plate 526 by a stop bolt 545 that penetrates a fool hole 544 formed in the top plate 526, and the upper end thereof can abut the attachment plate 538 on the girder 500 side. A cushioning member 546 is provided between the restriction 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 girder 500 side. It is designed to be able to absorb the shocks. Further, a regulation bolt 549 attached via a bracket 548 is arranged on the outer side portion of the regulation ring 542 so that the tip end faces the regulation ring 542 to prevent the regulation ring 542 from being displaced.

The suspending plate 514 pivotally connecting the upper balance beam 516 and the lower balance beam 518 comprises a pair of upper plates 56.
8 and a pair of lower plates 570 as main constituent elements.
The upper plate 568 has an upper end formed in a semicircular shape and is opposed to each other. In addition, the lower plate 570 has a narrow portion 572 at the upper portion and a scoop shape in which the lower end portion is formed in a semi-circular shape, and the narrow portion 572 is formed between the pair of upper plates 568 and the upper plate 568. The surfaces are inserted orthogonally to each other, and the side portions thereof are fixed to the upper plates 568. And each upper plate 5
68 and each lower plate 570, the pin 52 is concentric with the half-shaped portion.
0 and 522 through the upper balance beam 516 and the lower balance beam 51
6 are provided with pin holes 574 and 576. Further, each upper plate 568 is provided with a ring-shaped reinforcing plate 578 around the pin hole 574 on the outer surface, and a U-shaped hook 580 is attached below the reinforcing plate 578.
On the other hand, on each lower plate 570, a ring-shaped reinforcing plate 582 is fixed around the pin hole 576 on the opposite surface.

The upper balance beam 516 has a pair of side plates 584 facing each other, as shown in FIG. 7 (1). These side plates 584 are connected to each other via a top plate 586 interposed in the center of the upper part between them. And
As shown in FIG. 7B, each side plate 584 has a semicircular projecting portion 588 at the lower center in the longitudinal direction.
A pin hole 590 into which the pin 520 can be inserted is formed concentrically with the projecting portion 588. Further, 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
Has a length shorter than that of the side plate 584, and has semicircular notches 59 for passing the suspension rod 52 at both ends thereof.
4 are provided. Then, on the upper surface of the top plate 586, a hanging metal fitting 596 is erected so as to be orthogonal to the side plate 584. A connecting hole 598 for connecting a wire or the like is formed in the hanging metal fitting 596 (see FIG. 8 (2)).

On the other hand, around the pin hole 590 of the side plate 584, auxiliary plates 600 and 6 for reinforcing the side plate 584 on both inner and outer surfaces are provided.
02 is provided. Further, seat plates 604 are fixed to the lower portion of the side plate 584 on both sides of the projecting portion 588. The seat plate 604 is attached so as to extend between a pair of side plates 584, and a rod hole 606 for penetrating the suspension rod 52 is formed concentrically with the cutout 594 of the top plate 586. Then, as shown in FIG. 1, 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. 9A, the balance receiving seat 608 has a rectangular shape in a plan view, and a rod hole 610 through which the suspension rod 52 penetrates is provided at the center. As shown in FIG. 9 (2), the balance receiving seat 608 has a bottom surface 612 formed into a flat surface, and a seat surface 614 at the center of the upper surface is the left and right sides of the upper balance beam 516. It is formed in an arc that curves in the direction, and the shape in front view is a kamaboko shape. A cylindrical seat 550 is arranged below the balance receiving seat 608 which is a rod connecting portion. The seat surface of the cylindrical seat 550 is in contact with a nut 551 which is a rod connecting tool screwed to the lower end portion of the hanging 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 supported so as to be tiltable.

As shown in FIG. 10, the cylindrical seat 550 comprises a seat main body 552 and a receiving tray 554. The seat body 552 has a trapezoidal cross section on the lower seat surface side, and a through hole 556 through which the hanging rod 52 penetrates in the central portion.
Is provided. A flat seat surface 558 is formed around the through hole 556, and the outer edge of the seat surface 558 is an inclined surface 560. On the other hand, the receiving tray 554 has a concave cross section having a storage portion 562 that receives 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 central portion. The ring-shaped edge portion 566 of the tray 554 prevents the seat body 552 from being compressed and radially expanded by the load applied.
The seat body 552 and the tray 554 are integrated by a plurality of bolts.

In the case of the present embodiment, the seat body 552 is made of brass having a yield point of 2.8 t / cm ² , and the tray 554 is made of iron or the like having a rigidity higher than that of brass. In addition, the nut 5 that serves as a seat on the hanging rod 52 side
51 is made of a material having a higher yield point than brass, for example, S45C (steel) having a yield point of 3.6 t / cm ² . When the contact area of the seat body 552 with the nut 551, that is, the seat surface 558 has an area of 48 cm ² , the maximum design load acting on the seat surface 558 is set to 160 t, and when the maximum design load acts. 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, the momentary load change or shock up to the maximum design load is
It is used within the range of elastic deformation below the yield point of 50 to absorb momentary load changes and shocks. Also,
When a momentary load change or shock exceeding the maximum design load acts on the cylindrical seat 550, the impact is absorbed by utilizing the plastic deformation of the seat body 552.

As shown in FIG. 11, the boiler jack 60 includes a cylinder 74 as a fixed outer cylinder member which is erected on the upper surface of a box container-shaped ram chair 72 installed on the jack mounting beam 502, and a cylinder 74. Ram 7 interpolated into
It consists of six. The cylinder 74 has a double-walled structure and accommodates the ram 76 from an upper opening of a hydraulic chamber formed inside the wall body so that the ram 76 can be moved up and down. The hydraulic chamber is a pushing oil chamber 78 formed on the insertion lower end surface side of the ram 76.
And a return oil chamber 80 which is formed in the side wall surface portion of the ram 76 and which is partitioned by the lower end of the ram at a higher level than this and which raises the ram 76 by supplying hydraulic oil to the pressing oil chamber 78. 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 the boiler jack 60, and the suspension rod 52 is passed through the hole 82 to hold the neck portion formed on the suspension rod 52 for connection. While supporting the boiler module 56, the boiler module 56 is moved up and down as the ram 76 is driven. An upper chuck unit 84 is provided at the ram top end 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. This detail is shown in FIGS. 12-14 for the upper chuck unit 84.

FIG. 12 is a view on arrow A of FIG. 11, and FIG. 13 is FIG.
2 is a sectional view taken along line CC of FIG. 2, and FIG.
It is a side view in the state where 00 (refer to Drawing 12) was removed.
As shown in the figure, the upper chuck unit 84 has a rectangular chuck base 88 having an opening formed in the center thereof and is fixed to the top end surface of the ram 76. A pair of halved chucks 90 are mounted on the upper surface of the chuck base 88 so as to be capable of surface sliding. The chuck 90 is opened and closed in half, and in order to regulate the opening / closing direction, an inverted L-shaped slide guide 92 is attached along a pair of opposing edges of the chuck base 88, and each of the guides 92 is attached to the slide guide 92. 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 driving the pair of left and right chucks 90 to open and close are connected to both ends of the bracket 94. Hydraulic cylinder 96
Is located on the upper surface of the slide guide 92, and is expanded and contracted along the guide direction by the expansion and contraction action of the chuck 9.
Open and close 0.

The upper chuck unit 84 also includes a semi-circular ring-shaped top plate 98 that engages with the neck portion of the suspension rod 52 when the chuck 90 is closed. That is, the chuck 90 is formed with a semicircular cutout having a diameter slightly larger than the neck diameter of the suspension rod 52 in the half-divided portion, and a circular opening substantially matching the neck diameter is formed on the upper surface when the chuck is closed. The top plate 98 having a semicircular cutout 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, and an open sensor 102 for detecting that the chuck 90 is opened on the lower step portion. , And a closing sensor 104 for detecting that the chuck 90 is closed. The lower chuck unit 86 is also configured similarly to the upper chuck unit 84, but the unit 86 is installed inside the ramchair 72, and the cylinder 7
The suspension rod 52 can be chucked at the lower part of 4.

Here, the boiler jack 60 according to the embodiment.
Is set such that the length of the single rod 52S that constitutes the hanging rod 52 is the unit of the lifting stroke,
For this reason, it is configured to have an elevating stroke that is greater than or equal to the length of the single rod 52S. First, the hanging rod 5
2 is a rod unit 52 as shown in FIGS.
Although a plurality of S are connected in the axial direction to be elongated, each rod unit 52S has a large-diameter head portion 52B formed at the upper end portion of the rod portion 52A and at the lower end portion of the rod portion 52A. A male screw portion 52C is provided. Also, the head 52B
A female screw portion 52D is provided at the center of the end face of the. Then, the female screw portion 52D is screwed with the male screw portion 52C of the other rod unit so that the plurality of rod unit 52S can be screwed and coupled in the axial direction. Further, the rod 52S has a drop prevention groove 52E formed near the upper end of the head portion 52B for engaging with a protrusion provided on the gripping claw of the hanging rod attaching / detaching device 68.

The suspension rod 52 as described above can be load-supported by being chucked by the chuck unit, but the boiler jack 60 has the upper chuck unit 84.
And the lower chuck unit 86, the upper rod unit 5
2S and a plurality of rods 52S lower than the 2S can be chucked at the same time, and the load support can be transferred from the load supporting state by the upper chuck unit 84 to the lower chuck unit 86.
Of course, when the ram 76 changes from the lowered position to the raised position,
The load supporting state by the lower chuck unit 86 can be changed to the load supporting state by the upper chuck unit 84. This can be achieved by setting the lifting stroke of the ram 76 to be slightly larger than the length of the rod 52S.

By the way, when the lower chuck unit 86 shifts to the load supporting state of the suspension rod 52, the upper chuck unit 84 is opened so that the ram 76 can be moved up and down, and the rod unit 52S at the uppermost end of the suspension rod 52 is moved. It can be attached and detached. However, a plurality of rods 52S are connected between the position supported by the lower chuck unit 86 and the uppermost end of the rod, and in particular, when the screw connection of the tip rod 52S is to be released and separated, Center hole 8 located below it
There is a possibility that loosening of the screw connection portion in 2 will occur. Therefore, in the case of the raising mode in which the boiler module 56 is raised and the rod 52 is removed, the ram 7
An anti-rotation mechanism is provided for braking the rotation between the rod single body 52S2 that is lifted up and raised by 6 and the rod single body 52S3 (see FIG. 11) that is projected from the upper part of the cylinder 74 and is lifted next.

First, around the boiler jack 60, a frame 66 having a ramen structure constructed to stably support the jack 60 in an upright state is arranged (see FIG. 11). Frame 6
6. In such a frame 66, the upper chuck unit 84 chucks the rod unit 52 at the upper end of the lowered ram 76.
In order to prevent the rod single body 52S2 connected to the upper part of S from being rotated, the horizontal beam portion 106 provided at the height position of the large diameter head 52B of the rod single body 52S2 is equipped with the rotation stopping mechanism 110. ing.

This anti-rotation mechanism 110 includes a pair of turning arms 11 as shown in FIG.
2, the hydraulic cylinder 114 for connecting the arms is used to open and close the tip portion, and the rod block 52S2 is provided by the pressure block 116 provided at the opening and closing tip portion.
The large-diameter head 52B is pressed and clamped. The swivel arm 112 extends along the middle of the cross beam portion 1 so that the pressure block 116 is opened and closed at the axial center position of the boiler jack 60.
The mounting beam 118 arranged in parallel with
Mounted via the hydraulic cylinder 114
The end portion on the side is slid in the horizontal beam portion 106 so that it can be horizontally swung. As a result, the pair of revolving arms 112 is guided by the mounting beam 118 and the lateral beam portion 106 so as to be horizontally revolvable, and the hydraulic cylinder 114 is
The large diameter head 52B is clamped by the driving force of
It is supposed to realize a rotation stop.

A pair of beams 122, 1 on both sides of the swivel arm 112, to which the mounting beam 118 is passed, of the lateral beam portion 106.
An attachment / detachment sensor 124 is provided on the position 23 corresponding to the pressure block 116. The attachment / detachment sensor 124 is composed of four pairs of optical sensors 124A to 124D which are arranged to face each other, and can detect the separation and connection of the rod single bodies 52S constituting the suspension rod 52. That is, in the attachment / detachment sensor 124, as shown in FIG. 16, the sensors 124A to 124C are the rotation stopping mechanism 110.
It is arranged at a position substantially equal to the tip end surface of the head 52B of the rod unit 52S gripped by. The sensor 124B is located at the center of the rod single body 52S in the diametrical direction, and the sensors 124A and C are located on both sides of the sensor 124B.
It is arranged at a position where the male screw portion 52C of 2S can be detected, and the light emitting portion and the light receiving portion of these sensors 124A to 124C are shielded from light to turn off, thereby detecting that the rod single body 52S is coupled. You can do it. Further, the sensor 124D is located directly above the sensor 124B, and when the rod single body 152S is removed, the light receiving unit receives light from the light emitting unit and is turned on, and detects that the rod single body 52S is completely separated. I can do it.

A sensor beam 126 is arranged in parallel with the mounting beam 118 on the rear end side of the turning arm 112 of the mounting beam 118. FIG. 17 is a cross-sectional view taken along the line FF of FIG. 15 in which the sensor beam 126 is formed of an angle.
As shown in (1), the sensor beam 126 is located below the swivel arm 112, and the sensor beam 126 is shown in FIG. 17 (2) which is a sectional view taken along the line GG in FIG.
Four inverted L-shaped brackets 128 are fixed. The pressure block 11 is attached to the upper surface of the bracket 128.
A braking detection sensor 132 for detecting that the rod 6 has pinched the rod 52S and a braking release sensor 130 for detecting that the pinch is released by the pressure block 116 are attached.

Further, by providing the above-mentioned rotation stopping mechanism 110, the most advanced rod single body 52S1 can be automatically attached and detached. An example of this configuration is shown in FIG. As shown in the figure, a traverse frame 264 is attached to a main frame 266 provided above the twin boiler jack devices. Then, a traverse drive shaft 134 composed of a screw shaft is installed on the traverse flakes 264, and by driving a traverse motor 268 to which one end of the traverse drive shaft 134 is connected, the traverse drive shaft 134 is guided and adjacent to the traverse drive shaft 134. An automatic rod attaching / detaching device 68 that can be moved to a position is provided on the upper part of any of the boiler jack devices. This attachment / detachment device 68 is configured such that an 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 servo motor, and the rotation unit 138 can be raised and lowered by an elevation motor 144 formed of a servo motor. I am doing it. After the attachment / detachment device 68 is stopped moving right above one boiler jack device, it is moved downward to grip the large-diameter head 52B of the tip rod unit 52S1 immediately above the rod unit 52S2 under braking. By rotating and driving so as to release the screw connection, the rod single body 52S1 at the tip can be removed and the removed rod single body 52S1 can be transferred to the rod transfer device 70. On the contrary, the rod unit 52S suspends the rod 5
In the case of the lowering mode in which the rod is automatically connected to 2, the automatic rod attaching / detaching device 68 chucks the rod single body 52S1 to be connected, which has been conveyed by the rod conveying device 70, carries it into the connecting position, and the braking is applied. Rod only 52S
The connection is performed by rotating the screw so that the screw is tightened toward 2.

The operation of the boiler jack device constructed as above will be described with reference to the schematic view of FIG. In the initial state, as shown in FIG. 1A, the lower chuck unit 86 is in the closed state,
The lower chuck unit 86 supports the suspension rod 52 that suspends the boiler module 56. When raising the boiler module 56, first, the upper chuck unit 84 is closed to raise the ram 76 of the jack 60, and as shown in FIG. 5
After shifting to 6, the opening operation of the lower chuck unit 86 is performed.

After that, by continuing the upward drive of the ram 76 until the ram 76 reaches the rising end, the rod unit 52S chucked by the upper chuck unit 84.
The large-diameter head 52B of No. 2 reaches the operating position of the rotation stopping mechanism 110 ((3) in the same figure). 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 10 for ram 76
It can be confirmed by detecting that it has fallen about several millimeters. Due to this load transfer, the anti-rotation mechanism 110 is actuated, and the rod 52S2 second from the most distal end is braked. As a result, the lower chuck unit 86, which is the load bearing portion, and the rod unit 52S2 being braked
Even if there are a plurality of rod connecting portions between and, the rotation of the rods at this portion is prevented. Therefore, as shown in (4) of the same figure, the work of releasing the most advanced rod unit 52S1 higher than the rod unit 52S2 being braked is performed, and at the same time, the ram 76 starts to move down to the next ascending drive start position. It will return.

Although the rod releasing operation can be performed manually,
With the rod automatic attaching / detaching device 68 described above, the rod unit 52
S1 is rotated while being driven in the screw releasing direction and is raised, and is disengaged as shown in FIG.
It may be transferred to 0 and loaded into the rod storage box 54 by the rod transfer device 70. At the time when this work is finished, the ram 76 is in the state of starting the next ascending work, and the work of (1) to (5) shown in the figure may be repeated thereafter. On the contrary, in the case of the descending mode, the rod single unit 52S conveyed by the rod conveying device 70 is automatically attached to the rod automatic attaching / detaching device 68.
It is sufficient to carry in the work above the hanging rod 52 and perform the work of following the steps (5) to (1) which are almost the reverse of the case shown in FIG.

The lifting and lowering of the boiler module 56 via the suspension rod 52 is carried out by controlling by a controller (not shown) so that the stroke displacement of each boiler jack 60 becomes uniform. However, if the stroke displacements of the boiler jacks 60 are not uniform due to variations in the output due to manufacturing errors between the boiler jack devices, and if there is a difference in the ascending / descending speed between the plurality of suspension rods 52, the difference is measured. Is absorbed to prevent a large bending moment from acting on the suspension rod 52.
It is possible to avoid the damage and the like.

That is, for example, in the ascending mode, 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 is shown. When the rod lifting speed is higher than that of the boiler jack 60A, the upper balance beam 516 rotates about the pin 520 in the clockwise direction in FIG. The upper balance beam 516 is pivotally attached to the suspension plate 514, and the cylindrical seat 550 and the 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 through the cylindrical seat 550 and the balance receiving seat 608, the upper balance beam 516 is supported.
Even if is tilted, the tilt is absorbed by the cylindrical seat 550 and the balance receiving seat 608, and even if the upper balance 516 is tilted, a large bending stress can be prevented 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 simple substance 52S from becoming unusable. The same applies to the case of the descending mode.

Further, when there is a difference in the rising speed between the longitudinal ends of the girder 500 or between the left and right sides, that is, in FIG.
Boiler jack 60A side and boiler jack 60 shown in
When there is a difference in the ascending speed between the suspension rods 52 on the C side or at both ends in the direction orthogonal to the paper surface of FIG. 1, this speed difference is due to the load receiving mechanism provided between the lower balance beam 518 and the girder 500. Absorbed by 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 hanging rod 52 on the boiler jack 60C side, the lower balance beam 518 supports the girder 500 via the receiving seat 540. It rotates clockwise around the center of the upper surface of 536 in FIG. At this time, the spherical seat 53
The restriction ring 542 arranged around the cushion 6
Since it is 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 attached to the suspending plate 514 attached to the lower end of the hanging rod 52 via the pin 522, bending stress is applied to the hanging rod 52 to cause axial deflection of the hanging rod 52. Without causing
The suspension rod 52 is prevented from being damaged. The same applies when a difference occurs in the rising speed of the cross beam 500 in the longitudinal direction,
The same applies to the case of the descending mode.

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

20 to 22 show another embodiment. In these figures, the steel frame 61
6 is installed on the base frame 617, and a pair of cross beams 61 are provided between a pair of horizontal beams 618 provided on the upper part thereof.
9 is fixed. And, on each crossing beam 619,
Two pairs of jack mounting beams 502 are provided for each cross beam 61.
9 are installed so as to be orthogonal to each other, and hydraulic jacks 620A to 620 are provided at both ends of these jack mounting beams 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 having the same structure as the boiler jack 60 described above, in which the lifted object 624 is moved up and down through the suspension rod 52.

Each hydraulic jack 620 is a hydraulic jack 6
20A to 620D, hydraulic jacks 620E to 620H,
Hydraulic jacks 620I to 620L, hydraulic jacks 620
Each of M to 620P forms one set and one balance device 512A to 512D (balance device 5) via the suspension rod 52.
12D is floatingly supported (not shown). Each of the balance devices 512A to 512D supports a load receiving frame 626 on which a lifted object 624 such as a steel plate or a material is arranged.

The load receiving frame 626 includes a pair of weight beams 628 arranged in parallel with each other, and a pair of parallel intermediate beams 630 orthogonally arranged and fixed on the pair of weight beams 628.
It is composed of a plurality of parallel load-bearing beams 632 which are arranged orthogonally above and fixed to the upper part of these intermediate beams 630. Each weight beam 628 has balance devices 512 arranged at both ends, and is supported by the pair of balance devices 512. A load receiving mechanism 534 having the above-mentioned spherical seat 536 is provided at the center of the lower balance beam 518 of each balance device 512.
A weight beam 628 is supported via 34.

In this embodiment having such a configuration, the outputs of the hydraulic jacks 620A to 620P are controlled by the control device so that the lifting stroke displacement of each jack becomes uniform. If there is a difference in the ascending / descending speed between the jacks, the balance device 512 as described above.
As a result, the axial 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, the cylindrical seat is provided at the connecting portion between the suspension rod and the lifting object, and the cylindrical seat and the other seat surface abutting on the cylindrical seat are yielded. It is made 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 points of the seats, there is no momentary load change or shock within the maximum design load range. , Absorb by elastic deformation of each seat. In addition, when there is an instantaneous load change or shock that exceeds the maximum design load, the seat with a low yield point plastically deforms and absorbs the load change and shock, so the moment it is transmitted to the suspension rod. It is possible to reduce a change in the load and a shock, and to reduce the damage to the suspension rod and the load on the jack supporting the suspension rod.

Further, by supporting the lifted object by the suspension rod through the balance beam, when there is a difference in the amount of elevation 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 being applied to the suspension rod, and it is possible to prevent the suspension rod from being deformed such as axial wobbling or bending. further,
When a balance beam is provided on the balance beam and the balance beam is supported by the hanging rod through the balance beam, when a heavy load is supported by a plurality of balance beams,
Even if there is a difference in the amount of lift between the jacks and the lift is tilted in any direction, the balance beam and the auxiliary balance beam absorb the tilt of the lift and the suspension rod bends. Can be prevented from being damaged.

[Brief description of 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 state of the boiler jacks as seen from the front side of the lifting and lowering support device according to the embodiment.

FIG. 4 is a schematic diagram illustrating an entire boiler jack system to which the lift lifting / lowering support 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 diagram of a suspension plate for pivotally mounting the 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 which constitutes the balance device according to the embodiment.

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

9A and 9B are a plan view and a front view of the balance receiving seat according to the embodiment.

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

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

FIG. 12 is a view on arrow A of FIG. 11, and is a plan view of the upper chuck unit according to the embodiment.

FIG. 13 is a sectional view taken along the 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 view taken in the direction of arrow B in FIG. 11, and is a plan view of the rotation stop mechanism.

FIG. 16 is a view taken along the line DD of FIG.

17 is a cross-sectional view taken along the line FF and the line GG in FIG.

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 raising and lowering a suspension rod according to an embodiment.

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

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

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

FIG. 24 is an explanatory diagram of a hoisting state of the boiler module by the hanging rod.

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

[Explanation of symbols]

 52 Hanging Rod 52S Rod Single Unit 56 Lifted Object (Boiler Module) 60 Boiler Jack 68 Rod Automatic Attachment / Detachment Device 70 Rod Conveying Device 84 Upper Chuck Unit 86 Lower Chuck Unit 110 Anti-rotation Mechanism 500 Girder 512 Balance Device 516 Auxiliary Balance Beam (Upper Balance) Beam) 518 Balance beam 534 Load receiving mechanism 536 Spherical seat 550 Cylindrical seat 551 Rod connecting tool (nut) 608 Balance receiving seat

Front Page Continuation (72) Inventor Hideo Koide 1-1-14 Kanda, Chiyoda-ku, Tokyo Hirit Plant Construction Co., Ltd.

Claims (5)

[Claims] 1. A lifting object lifting and lowering supporting device for lifting a lifting object by a lifting rod, and lifting and lowering the lifting object by a lifting object jack provided on the lifting rod, wherein the lifting rod and the lifting object are provided. A cylindrical seat is provided on one of the connecting parts of the above, and this cylindrical seat and the other seating surface abutting this are formed of materials having different yield points, and the surface pressure of the seating surface at the maximum design load is The lifting / lowering support device is characterized by being set in the middle of the yield point of the seat. 2. A lifting object lifting / lowering supporting device for hanging a lifting object by a plurality of hanging rods, and lifting and lowering said lifting object by a plurality of lifting object jacks provided for each hanging rod, A balance beam is arranged on the lower surface of the lifting object, and a seating surface for bearing a load is formed at a facing portion between the balance beam and the supporting point of the lifting object, and at least one seat is used as a spherical seat. A lifting object lifting and lowering supporting device, wherein a beam is made swingable, and the balance beam is provided with connecting portions of the suspension rods on both sides sandwiching the spherical seat. 3. A cylindrical seat is provided at the connecting portion of the suspension rod to the balance beam between the lower surface of the balance beam and the rod connecting tool,
The lifting / lowering support device according to claim 2, wherein the swing displacement of the balance beam can be absorbed by the cylindrical seat. 4. A lifting object lifting and lowering support device for lifting a lifting object by a lifting rod, and lifting and lowering the lifting object by a lifting object jack provided for each lifting rod. A balance beam is arranged on the lower surface, and a seat surface that bears a load is formed at the facing portion of this balance beam and the supporting point of the lifting object, and at least one seat can be used as a spherical seat to swing the balance beam. The balance beam is provided with an auxiliary balance beam forming a connecting portion of the suspension rod on both sides of the spherical seat, the suspension rod is inserted through the auxiliary balance beam, and the suspension rod connector and the auxiliary balance beam are provided. A lifting and lowering supporting device for lifting and lowering a heavy object, wherein a cylindrical seat is provided between the lifting and lowering surface of the lifting and lowering part to absorb axial runout of the hanging rod. 5. The cylindrical seat and the other seat surface abutting against the cylindrical seat are made 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 lift lifting / lowering support device according to claim 4, wherein