JPH0452248Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a lifting device for erecting a tower-like structure.

(Prior art) Conventionally, when constructing a pair of tower-like structures such as the main tower of a long suspension bridge, various crane devices are attached near the upper end of each tower-like structure in the middle of construction. Generally, the divided blocks of the tower-like structure are lifted up and mounted, and then the crane equipment is raised one level upward using the lifting device, and this process is repeated in order to erect the tower-like structure. It is true.

As the crane of the above-mentioned crane device, each jib crane may be attached to each tower-like structure as described in JP-A No. 53-89157, but in this case, a pair of tower-like structures are erected. Two cranes are required to do this, but at the time of erection, in addition to lifting the divided blocks, there are also many incidental tasks such as preparing to lift the divided blocks and bolting up the divided blocks after installation.
Crane operation rate will be low, which will be disadvantageous in terms of equipment economics.

Therefore, we installed a crane girder that spans a pair of tower-like structures, and installed an overhead crane that runs along this crane girder (for example,
51-33663), or a non-swivel, non-self-propelled derrick crane is installed in the center of the span of the crane girder (for example, Japanese Patent Application Laid-Open No. 54-3363).
96231), and there are also cases where a boom-swivel jib crane is installed that runs on the crane girder (for example, Japanese Patent Application Laid-Open No. 1983-1999).
(See Publication No. 111351).

On the other hand, a lifting winch is installed on the ground, the wire is extended to the ground from the end of the girder through the sheave of the girder near the top end of the tower structure, and the dividing block is suspended from the hook at the tip of the wire. For erection of a tower-like structure, the split block is hoisted to near the top of the tower-like structure using a lifting winch, and finally the split block is mounted on the top of the tower-like structure using a jib crane, etc. installed on the girder. Lifting equipment has also been put into practical use.

(Means for Solving the Problems) The tower-like structure erection and lifting device according to the present invention is a tower-like structure erection and lifting device provided on a pair of left and right tower-like structures in the middle of erection. Front and rear 1s arranged horizontally and in parallel across both tower-like structures on both front and rear side surfaces near the upper ends of the pair of tower-like structures.
a pair of girders, a pair of left and right beams arranged on the outer side of each of the tower-like structures substantially orthogonal to the length direction of the girders and connecting the opposing ends of both the girders; a boom-swivel jib crane that travels on the tower; a guide member provided on the outer surface of each of the tower-like structures along substantially the entire length thereof; This is a lifting platform on which divided blocks of a shaped structure are placed and supported, and is equipped with an lifting platform that is driven up and down by the jib crane or a lifting winch installed on the ground.

(Function) In the lifting device for erecting a tower-like structure according to the present invention, a pair of front and rear girders and a girder are installed in the vicinity of the upper ends of a pair of left and right tower-like structures in the middle of erection. A pair of left and right beams are provided that connect the opposing ends of the beams, respectively, and a boom swing type jib crane that travels on the pair of girders is provided.

When lifting a divided block, the divided block is placed and supported on a lifting platform, and the lifting platform is lifted using the jib crane or a lifting winch installed on the ground. Since this lifting platform during lifting is guided in the vertical direction by a guide member on the outer surface of the tower-like structure, the lifting platform can be lifted without swinging even in the presence of some wind. When the platform reaches its upper limit near the top of the tower-like structure, the jib crane is used to lift the divided blocks of the platform, and it is mounted at a predetermined position on the top of the tower-like structure using high-strength bolts, etc. Fix it.

After loading the specified divided blocks (sometimes more than one block) onto the top of the left and right tower-like structures using the left and right lifting platforms as described above, the jib crane is mounted on a pair of girders. A pair of beams and a separately attached lifting device are used to raise the block one stage upward and fix it to the tower-like structure again, and the work of lifting, mounting, and fixing the next stage of divided blocks is carried out.

(Effect of the invention) According to the lifting device for erecting a tower-like structure according to the invention, as described above, the divided blocks are mounted on a lifting platform that is guided vertically by a guide member along the outer surface of the tower-like structure. Since the split blocks are supported and lifted up, it is possible to reliably prevent the split blocks from swinging due to wind. Therefore, it is possible to proceed with construction work safely.
It is possible to eliminate damage to split blocks and structures, damage to scaffolding, etc., improve the operating rate of equipment and personnel,
Effects such as being able to shorten the construction period can be obtained.

In particular, when lifting and lowering each lifting platform using a lifting winch installed on the ground, the split blocks are lifted alternately by a pair of left and right lifting platforms, and the jib crane is used to alternately lift the divided blocks to the left and right tower structures. By installing it on a jib crane, it is possible to operate the jib crane at full capacity and significantly shorten the construction period. Moreover, in this case, a relatively short wire for the jib crane is sufficient, so the winch of the jib crane can be made smaller and lighter, and the weight of the girder, beam, and jib crane can be reduced.

(Example) Hereinafter, an example in which the present invention is applied to a lifting device for constructing a tower-like structure used for constructing a long suspension bridge will be described with reference to the drawings.

As shown in Figures 1 and 2, the main tower T will have a height of 300 m or more when completed, and the main tower T
It has a structure in which a pair of left and right tower bodies 1 are connected by diagonal members 2, and is divided into rings at predetermined heights, and divided blocks 3 into a plurality of blocks are mounted upward one after another to create a high-strength tower. It is constructed by fixing it with bolts, etc.

The pair of left and right tower bodies 1 of the main tower T are gently inclined, approaching each other as they move upward, like the legs of a trapezoid, and the outer surface 1a of each tower body 1 is slightly inward from the vertical plane. leaning towards However, each tower body 1 may be vertical.

The lifting equipment for constructing a tower-like structure used to construct the main tower T includes a boom-swivel jib crane 4, a staging 5 for mounting the jib crane 4, a guide member 6, a lifting winch 7, and a lifting winch. A divided block lifting platform 8 that is driven up and down by 7.
It is equipped with such things as

As shown in FIGS. 1 to 3, the jib crane 4 is installed on a staging 5 so as to be movable left and right, and the staging 5 is attached to the upper end of the main tower T that is being constructed. As the height of the main tower T increases, the main tower T is successively raised upward by a lifting device.

The above-mentioned staging 5 includes a pair of girders 9 arranged horizontally and parallelly on both front and rear side surfaces near the upper end of the existing part of the main tower T, and a pair of girders 9 on the left and right tower bodies 1 approximately in the length direction of the girders 9. The girder 9 is disposed on the orthogonal outer surface 1a side and is supported by the tower body 1.
It consists of a pair of left and right fixed beams 10 that connect opposite ends of the girder 9, and each end of each girder 9 is slidably inserted into a fitting hole 10a of the fixed beam 10 and extends outward. As each tower body 1 shifts inward as the height of the main tower T increases, the position of each fixed beam 10 is sequentially changed inward accordingly. Although not shown, a lifting device is provided between each tower body 1 and the girder 9 on the front and rear sides of each tower body 1 to raise the girder 9 and the fixed beam 10 upward relative to the tower body 1. A pair of left and right fixed beams 10 are attached to the outer surface 1a of the tower body 1 each time they are raised by a lifting device.
It is connected and fixed with bolts and nuts to a connecting piece that protrudes from the top. The above-mentioned lifting device includes a guide frame that is detachably attached to the front and rear sides of each tower body 1, and an engagement member that detachably engages with an engagement hole at a predetermined pitch in the guide frame at the tip of the piston rod. a lifting device consisting of a hydraulic cylinder and the like; a lifting device that connects the wires of four lifting winches disposed on the girder 9 side to a connecting piece at the upper end of the divided block 3 to lift it up; In addition to the above, various existing lifting devices can be used. However, it is also possible to raise it using a lifting winch 7 on the ground.

Furthermore, after raising the girder 9 and the fixed beam 10 using the lifting device, each fixed beam 1 is
0 toward the tower body 1 side is a hydraulic cylinder attached horizontally to the front or rear side of each girder 9 that does not face the tower body 1 side, and whose piston rod tip is connected to the fixed beam 10. A device consisting of a cylinder, a device in which wires from a pair of auxiliary winding winches of the jib crane 4 are connected to the fixed beam 10, and the wires are pulled by the auxiliary winding winches, etc. can be used. However, a dedicated winch may be used instead of the auxiliary winding winch.

As shown in FIGS. 1 and 4, the jib crane 4 includes a traveling base 11 and a rotating base 1 provided on the traveling base 11 so as to be driven to rotate by a rotating drive mechanism.
2, the traveling platform 11 has driving wheels 11a that run along the rails 9a on the front and rear girders 9, and four sets of legs 11b that extend and contract with hydraulic cylinders, etc. is the boom 13 and support column 14
A crane winch 15 capable of lifting the split block 3, two auxiliary winding winches 15a, an undulating winch for raising and lowering the boom 13, and their drive motors are provided. 4 pairs of legs 11
b is provided to prevent the load from being applied to the wheels when lifting a large load, and the weight of the wheel portion can be reduced. Further, instead of extending and contracting the four sets of legs, the driving wheel 11a may be retractable. Although not shown in the figure, the rail 9a has an I-shaped cross section, and in order to prevent the jib crane 4 from overturning, there is a part near each leg 11b of the traveling platform 11 that is slidably engaged with the rail 9a at all times. An engaging member is provided to prevent the vehicle from falling.

On the other hand, two sets of lifting winches 7 and their drive motors are provided on the ground, wires 7a extending from these winches 7 extend to the center of the girder 9 via a sheave 7b, and one wire 7a is connected to a sheave 7c. It extends to the left end of the girder 9 via a sheave (not shown) near the left end of the girder 9, and is led to a sheave 7d suspended on both sides of the fixed beam 10, and extends downward via the sheave 7d. is,
The other wire 7a is disposed symmetrically with the one wire 7a, and extends downward through the sheave 7d of the fixed beam 10 on the right end side of the girder 9.

Next, the gently inclined outer surface 1 of each tower body 1 during construction
a, and a divided block lifting platform 8 (hereinafter simply referred to as (referred to as the lifting platform 8) will be explained.

Two guide members 6 are fixed in parallel to the outer surface 1a of each tower body 1 at a predetermined interval in the front and rear, and these guide members 6 extend the entire length of the outer surface 1a of the tower body 1 under construction. . Each of the guide members 6 has a T-shaped cross section and is composed of a web material 6a and a flange material 6b, and the end of the web material 6a is fixed to the outer surface 1a by welding, bolts, etc. (see FIG. 8).

It is desirable that these guide members 6 be attached to the outer surface 1a of the divided block 3 before the divided block 3 is mounted, but they may be attached after the divided block 3 is erected.

As shown in FIGS. 5 and 6, the lifting platform 8 has a pair of front and rear A-shaped frames 16 arranged vertically and upright with respect to the outer surface 1a of the tower body 1. It has a structure in which the underframe 18 is removably attached to the lower ends of a pair of A-shaped frames 16, and a sheave 19 at the upper end of the A-shaped frames 16 is connected by a connecting frame 17 located on the side. The wire 7a of the winch 7 is hung.

As shown in FIG. 8, guided parts 20 that engage with the corresponding guide members 6 are provided at both the front and rear upper and lower ends of the connection frame 17, and each guided part 2
0 includes an engaging portion 21 and a flange member 6a that engage with both side edges of the flange member 6b of the guide member 6 from both sides.
Each guided portion 20 is restrained by the flange member 6b so as not to move in the front-rear direction and left-right direction. 6 in the vertical direction.

However, the guide member 6 restricts the movement of the lifting platform 8 back and forth and in the direction away from the outer surface 1a, and the rollers etc. that roll in contact with the outer surface 1a restrain the movement in the direction approaching the outer surface 1a. It may also be possible to restrict movement to.

In this way, the lifting platform 8 has four sets of guided parts 20.
The guide member 6 allows the guide member 6 to move only in the vertical direction.

As shown in FIGS. 5 and 6, the lifting platform 8
By using the underframe 18 in conjunction with the trolley 23 equipped with idle wheels on the lower side, this underframe 18 can also be used as a transport vehicle for transporting the divided blocks 3, and the tower body 1 A transport path 24 is provided from near the lower end of the outer surface 1a to within the reach range of a marine crane, a water crane, etc., and a cart 23 on which the underframe 18 is mounted is movable on this transport path 24.

Next, using the lifting device explained above, the main tower T
We will explain the operation when erecting.

First, the underframe 18 of the lifting platform 8 is removed, and the underframe 18 is placed on the cart 23 and moved along the conveyance path 24, and is moved into the reach of a marine crane, a water crane, or the like.

Next, the divided block 3 suspended by a marine crane or a water crane is placed on the underframe 1 on the trolley 23.
The divided block 3 placed on the column 8 is transported to the vicinity of the lower end of the tower body 1. And lifting platform 8
The parts other than the underframe 18 are lowered, and the underframe 18 is connected to the lower ends of the pair of A-shaped frames 16 with bolts, nuts, etc.

Next, by winding the wire 7a with the lifting winch 7, the lifting platform 8 is moved to the outer surface of the tower body 1.
Lift it up along a.

During this lifting, the guided portion 20 of the lifting platform 8 is guided in the vertical direction by the guide member 6, so even if the wind is blowing, the lifting platform 8 and the divided blocks 3 placed thereon can swing back and forth and from side to side. Without doing anything, he was hoisted up.

Moreover, since the outer surface 1a is inclined inward and the sheave 7d of the fixed beam 10 is located at a predetermined distance from the outer surface 1a, a force acting on the lifting platform 8 and the dividing block 3 to approach the outer surface 1a side is applied. The idler ring 22 is lifted up while rolling substantially in contact with the outer surface of the flange member 6b.

By the time the lifting platform 8 reaches the vicinity of the upper end of the tower body 1, the jib crane 4 moves to the end of the lifting platform 8 that is to be lifted, and extends the four legs 11b to enable lifting. Waiting in a state. When the lifting platform 8 has ascended and descended to the upper limit position, the divided block 3 is suspended by the hook of the jib crane 4, and the divided block 3 is mounted at a predetermined position on the uppermost stage of the tower body 1, and the high-strength bolt is attached. Fix it with etc.

As mentioned above, while the divided block 3 is being transferred from one lifting platform 8 to the jib crane 4 and being loaded thereon, the divided block 3 is placed on the other lifting platform 8 and lifted up. In this way, two sets of lifting winches 7
When the divided blocks 3 are lifted up alternately via the lifting platform 8, the jib crane 4 can perform the loading work efficiently without idling, and the construction period can be shortened.

After the installation of the divided blocks 3 to the top of the left and right tower bodies 1 is completed, the entire structure is supported by a lifting device (not shown), and in this state, the fixation of the left and right fixed beams 10 is removed, and staging is carried out using the lifting device. 5 and the jib crane 4 to the highest stage, the left and right fixed beams 10 are pulled toward the tower body 1 side by a pulling device and fixed to the tower body 1. Thereafter, the main tower T can be erected by repeating the transporting, hoisting, mounting, raising, and pulling of the divided blocks 3 in this order.

Incidentally, when lifting the diagonal member 2, the underframe 8 of the lifting platform 8 is not used and the diagonal member 2 is lifted as shown in FIG. In this case, if the hanging piece 25 for hanging by the hook of the jib crane 4 is provided at a predetermined position determined by the relationship with the center of gravity of the diagonal member 2, when the diagonal member 2 is hung by the jib crane 4, the diagonal member 2 will be It assumes a predetermined tilted posture suitable for mounting.

In the lifting device according to the above embodiment, when lifting the divided block 3, the lifting platform 8 is guided in the vertical direction by the guide member 6, so that the divided block 3 is lifted up.
Since the divided block 3 is lifted while restraining its movement in the front-rear direction and left-right direction, the divided block 3 will not be swayed even when a strong wind is blowing, and the divided block 3 can be lifted safely and at high speed. I can do it.

Furthermore, two sets of lifting winches 7 are provided on the ground, and a lifting platform 8 that is driven up and down by each lifting winch 7 is arranged on the outer surface 1a of each tower body 1, so that the division blocks of each tower body 1 are 3 in parallel or alternately, the time-consuming lifting work to a high place can be efficiently carried out, and one jib crane 4 can be fully operated to shorten the construction period. Furthermore, since the boom swing type jib crane 4 is used, the degree of freedom is large and the workability is excellent.

Furthermore, since the jib crane 4 only needs to mount the divided block 3 lifted up to near the upper end of the tower body 1 on the uppermost stage of the tower body 1, the winch 15 only needs to be equipped with a relatively short wire.

Therefore, the winch 15 and its drive motor can be made smaller, and the jib crane 4 can be made lighter and the lifting device smaller.

Since the ends of the girders 9 are slidably inserted into the fitting holes 10a of the fixed beams 10, the pair of girders 9 and the pair of fixed beams 10 are in a mutually supporting relationship. Therefore, when the girder 9 is raised with the lifting device, the fixed beams 10 can also be lifted up, and after raising the girder 9, each fixed beam 10 is pulled toward the tower body 1 side using a simple pulling device, and the fixed beams 10 are pulled against the outer surface 1a. The position of the sheave 7d can be kept constant. and,
Since the lifting is carried out via the girder 9 and the fixing to the tower body 1 is carried out via the fixing beam 10, the structures of the lifting device and the fixing means are simplified.

Note that the lifting winch 7 may be omitted and the lifting platform 8 may be lifted by the jib crane 4.

Further, it is preferable that the guide member 6 is removably fixed to the outer surface 1a of the tower body 1 with bolts or nuts rather than being welded to the outer surface 1a of the tower body 1. Only one guide member 6 may be provided on each outer surface 1a, The structure of the member 6 may be of various types, such as an L-shaped cross section, a rod-like structure, a V-shaped structure, or an H-shaped rail structure.

However, the guide member 6 is formed integrally with the divided block 3 at the time of manufacturing the divided block 3 of the tower body 1.
After the construction is completed, it may be left as part of the tower body 1 permanently without being removed. Side view Figures 5 and 6
In the figure, a protrusion 1b on the front or rear surface of the tower body 1 may be used as the guide member 6.

The elevating table 8 is not limited to the one in the embodiment, and may have the function of supporting (supporting by placing) the divided block 3 and the function of being guided by the guide member 6.

[Brief explanation of the drawing]

The drawings relate to an embodiment of the present invention, and FIG. 1 is a front view of the main tower and the erection and lifting equipment during construction, FIG. 2 is a side view of the same, FIG. 3 is a plan view of the same, and FIG. A front view of the boom-swivel jib crane; FIG. 5 is a perspective view showing the state in which the divided block is set on the lifting platform; FIG. 6 is a perspective view showing the state in which the divided block is supported and lifted by the lifting platform; FIG. 7 8 is a perspective view of the diagonal member being supported and hoisted by the lifting platform with the underframe removed, and FIG. 8 is a plan view of the tower, the guide member, and the lifting platform. T...Main tower, 1...Tower body, 1a...Outside surface, 3
...Divided block, 4...Boom rotating jib crane, 6...Guide member, 7...Lifting winch, 8...Lifting platform, 9...Girder, 10...Fixed beam, 16...A-shaped frame, 17... Connection frame, 18... Underframe, 20... Guided portion.

Claims (1)

[Scope of Claim for Utility Model Registration] In a lifting device for the erection of tower-like structures installed on a pair of left and right tower-like structures in the middle of erection, on both front and rear side surfaces near the upper ends of the pair of tower-like structures. A pair of front and rear girders are arranged horizontally and parallelly across both tower-like structures, and a pair of girders are arranged on the outer side of each tower-like structure, which is substantially orthogonal to the longitudinal direction of the girders, so that the girders face each other. a pair of left and right beams connecting the ends; a boom-swivel jib crane that runs on the pair of girders; a guide member provided on the outer surface of each of the tower-like structures over substantially the entire length thereof; An elevating platform provided on each of the outer surfaces and guided in the vertical direction by guide members, on which the divided blocks of the tower-like structure are placed and supported, and which is driven up and down by the jib crane or the lifting winch provided on the ground. 1. A lifting device for erecting a tower-like structure, characterized in that it is equipped with a lifting platform.