JPH0728179Y2 - Lifting device for tower erection crane - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a lifting device for a tower erection crane.

[Prior art]

When the divided blocks of tower-like structures such as the main tower of a long suspension bridge are piled up one after another with a crane and the tower-like structures are erected, the work area of the crane becomes higher as the tower erection work progresses. Generally, as the construction work of tower-like structures progresses, a method of raising a crane along the tower body is adopted.

Therefore, two sets of upper and lower guide rails for lifting the crane are detachably attached to the tower body, the crane main body is attached to this guide rail, and the crane main body is raised along the guide rail. Is generally used (see Japanese Patent Publication No. 56-27646).

According to the conventional lifting device, after the installation work within a predetermined range is completed, first remove the guide rail below the crane body from the tower body and move it above the crane body, and the guide rail on which the crane body is attached. The guide rail is attached to the tower so as to be connected to the upper end of the tower, and then a balance having a pulley block is attached to the upper part of the guide rail transferred to the upper stage or the top of the tower, and the pulley block and the pulley and winch on the crane side are attached. Remove the crane body from the guide rail and lift it up along the guide rail while supporting the weight of the crane body with the wire hung over the rail, fix the crane body to the guide rail again at the specified position, and remove the balance. Resume construction work.

[Problems to be solved by the device]

In the conventional lifting equipment for tower erection cranes, the crane body is fixed to the tower body via the guide rail, so the load of the suspended load on the crane and the weight of the crane body are all contained in this guide rail. Therefore, it is necessary to make the guide rail considerably strong,
The weight of the guide rail itself also increases. Moreover, since the guide rails are sequentially moved upward each time they are raised, two sets of guide rails are required. Also, since a balance separate from the guide rail is used, it is necessary to move a heavier balance in addition to the guide rail, and it is a very dangerous and difficult task to move these guide rails and the balance at a high place. Therefore, the raising process of the crane body requires a time comparable to that of the erection process, and there is a problem that the operating rate of the crane is significantly reduced and the period of tower erection work is prolonged.

The purpose of the present invention is to reduce the size and weight of this guide rail,
An object of the present invention is to provide a hoisting device for a tower erection crane that can omit the hoisting balance and can significantly reduce the time required to hoist the crane body.

[Means for Solving the Problems]

The lifting device for a tower erection crane according to the present invention is a lifting device for lifting and relocating a tower erection crane along a guide rail via a wire rope, wherein the guide rail serves as the outer surface of the side wall of the tower body. Is provided with a pair of vertically extending guide rails in the horizontal direction, and a pair of guide rails is vertically slidably guided by the pair of guide rails to the crane main body of the tower erection crane. A plurality of mounting brackets for fixing the crane body to the side wall of the tower body and a plurality of mounting brackets for fixing the pair of guide rails to the side wall of the tower are provided independently. The crane main body and the guide rail member can be independently fixed directly to the side wall of the tower body, and the pulley blocks are integrally formed on the upper ends of the pair of guide rails. While Bei, the crane body so as respectively corresponding to the lower pulley block of one-to-one
Equipped with a pair of pulley blocks, a plurality of wire ropes are hung over each pulley block of the guide rail and the corresponding pulley block on the crane body side, and the above-mentioned 1
The crane body can be lifted by winding a pair of wire ropes.

[Action]

In the hoisting device for a tower erection crane according to the present invention, the crane main body is directly fixed to the tower body through the mounting bracket when the tower is erected, and the pair of guide rails are connected to the crane main body through the mounting bracket. Are independently fixed to the tower.

When raising the crane body, first unfix the guide rail on one side, and while paying out the winch wire corresponding to that guide rail, hang the guide rail with the main winding hook and auxiliary winding hook of the crane and move it up a predetermined distance. It is relocated to and fixed to the tower. Next, in the same manner as above, the other guide rail is suspended and moved upward by a predetermined distance to be fixed to the tower body.

Next, the crane body is unfixed and the wire is wound up with a pair of winches to raise the crane body along the pair of guide rails by a predetermined distance, and then the crane body is attached to the tower via the mounting bracket. Fix it to the body.

In this state, the tower erection work by the crane can be restarted.

[Effect of device]

According to the lifting device for a tower erection crane according to the present invention, the pair of guide rails and the crane main body are directly fixed to the side wall of the tower independently through the mounting brackets. The load and the weight of the crane main body do not act on the guide rail, and the guide rail needs only to have strength as a guide when the crane main body is lifted up, so that the weight and size can be reduced.

In addition, since a pair of guide rails is attached to the side wall of the tower independently of the crane body, only the guide rails can be moved independently of the crane body, and the guides are divided into upper and lower parts as in the prior art. It is not necessary to prepare a rail, and when the guide rail is moved upward, the guide rail slidably engaged with the guided portion of the crane body can be lifted upward. Only by providing a pair of guide rails, the required number is reduced by half.

Since the guide rails are lighter and smaller than those of the prior art, it is easy to handle, and even when the crane body is engaged in the original erection work, the guide rails can be moved in parallel. Since it is not necessary to mount a separate balance as in the prior art, the labor and time for raising the crane body can be greatly reduced, and the construction period and cost can be reduced. Furthermore,
Since the crane body is provided with a pair of guided parts that are slidably guided in the vertical direction by a pair of guide rails,
You can secure stability when raising the crane body,
Also, since the wire block is laid over a plurality of windings over the pulley block on the upper end of each guide rail and the pulley block on the crane body side corresponding to the lower part of this block,
The winch for winding this wire rope can be significantly reduced in size.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

In this embodiment, the present invention is applied to a hoisting device for hoisting a main tower (hereinafter referred to as a tower body) of a long suspension bridge, which sequentially hoists according to the progress of construction.

The crane C is a boom-turning type jib crane, and includes a cargo handling mechanism unit 1 and a support mechanism unit 2. The cargo handling mechanism unit 1 is a base plate 3 and a boom which is pivotally attached to the base plate 3 at its lower end and can be tilted up and down. 4, a pulley block 5, a frame 6 supporting the pulley block 5, a main winding winch 7 and a supplementary winding winch 8 provided on the base plate 3, and the like. A support plate 12 for removably attaching to the side wall of 10 via a mounting bracket 11, and a connecting member 13 for the support plate 12.
The vertical cylinder member 14 connected by the above, the rotary shaft member disposed in the cylinder member 14 and connected to the base plate 3, and the large-diameter rotary member 15 fixed to the lower end of the rotary shaft member. And the large-diameter rotating member 15
And a pair of tension members 16 for connecting the outer end of the base plate 3 to each other. The cargo handling mechanism unit 1 is supported by the tubular member 14 and the tension member 16 within a predetermined angle range with respect to the tubular member 14. It can be horizontally swiveled to the left and right, and swiveled by a swivel device (not shown).

The lifting device E has a mounting bracket 17 attached to the side wall of the tower 10.
A pair of left and right guide rails 18 which are detachably attached via a pulley block 19, a pulley block 19 integrally provided at the upper end of each guide rail 18, and a pulley block 19 near the upper end of the support plate 12 1 pair of left and right pulley blocks 20 are provided, and a pair of left and right guide pulleys 21 are provided on the outer surface of the support plate 12 at a position immediately below and corresponding to each pulley block 20.
And a pair of left and right lifting winches 22 provided in the middle part of the support plate 12 so as to correspond to the respective guide pulleys 21, a pair of left and right pulley blocks 19, 20 and a guide pulley 21, and a lifting winch 22. It consists of a wire rope 23 wound around the ground. The guide rail 18 is formed to have a length which is about twice as long as the support plate 12 or more.

The support plate 12 is attached almost vertically to the side wall of the tower body 10,
Two lifting winches 22 are provided on the outer surface thereof. Two guide rails 18 are inserted almost vertically between the support plate 12 and the side wall of the tower body 10 along the tower body 10, and the arms provided at the upper ends of the guide rails 18 respectively.
A pulley block 19 is integrally provided on the upper portion of 18a, and two sets of pulley blocks 20 are provided on the upper portion of the support plate 12 so as to correspond to this.
Are juxtaposed. With respect to each guide rail 18, a wire rope 23 wound around the pulley block 19 at the upper end of the guide rail 18 and a pulley block 20 provided on the support plate 12 is wound a plurality of times, and the outer surface of the support plate 12 is provided through the guide pulley 21. It is designed to be wound up by the lifting winch 22 provided at. Therefore, the guide rail 18 is fixed to the side wall portion of the tower body 10 via the mounting bracket 17, the mounting bracket 11 portion fixing the support plate 12 is released, and the lifting winch 22 is wound to support. The plate 12 will be lifted up by the wire rope 23.

The cross section of the support plate 12 is substantially E-shaped, and an appropriate number of guide shoes on which the guide rail 18 slides are provided in the two recesses, and when the guide rail 18 is lifted and the crane C is used.
It serves as a guide for raising the body and stabilizes the posture while supporting the load.

The support plate 12 is attached via four dedicated mounting brackets 11 provided on the side wall of the tower 10 already installed, and the guide rail 18 is separately provided on the side wall of the tower 10 already installed. It can be mounted via a dedicated mounting bracket 17. Therefore, the support plate 12 and the guide rail 18 can be separately attached and detached independently.

Next, the operation of hoisting the crane C using the hoisting device E will be described. First, the guide rail mounting bracket 17 and the support plate mounting bracket 11 are provided at predetermined positions on the side wall of the tower body 10. Are previously attached by welding or bolts, and the guide rail 18 is attached to the tower body 10 via the attachment bracket 17 and the crane C is attached to the tower body 10 via the attachment bracket 11. When raising the rail, first use the main or auxiliary winding hook of the crane C to guide rails.
While the upper end of 18 is suspended, the pin of the mounting bracket 17 supporting the guide rail 18 is pulled out, and as shown in FIG. 2, the wire rope 23 is extended from the lifting winch 22 while the guide rail 18 is being pulled out. Is lifted up to a predetermined height, and is attached to the side wall portion of the tower body 10 via a mounting bracket 17 and a pin. At this time, since the crane C is used only when the guide rail 18 is lifted, these operations can be performed substantially in parallel with the erection work of the tower body 10, and the time required for raising the crane can be greatly increased. Can be reduced to

Next, to lift crane C, lift the winch.
Take up a small amount of the wire rope 23 with 22 and lift the crane C slightly, and then pull out the pin supporting the crane C from the mounting bracket 11 and, as shown in FIG. When the wire rope 23 is wound up at 22, the support plate 12 gradually rises along the guide rail 18 and is attached to the side wall portion of the tower body 10 through the attachment bracket 11 and the pin at a predetermined position.

In the conventional lifting device, it is necessary to prepare a balance separate from the guide rail, and since this balance is also a large member for hoisting the crane, it requires a lot of labor and man-hours to move the balance. .

In the lifting device of the present invention, since the portion corresponding to the balance is integrated with the guide rail 18, the balance relocation work is eliminated, and the crane lifting time is reduced accordingly. Furthermore, in the past, since the hoisting pulley block was hung under the arm of the balance, this hoisting block blocked the crane hoisting range,
According to the lifting device of the present invention, since the pulley block 19 of the guide rail 18 is attached to the upper end of the arm 18a, the support plate 12 can be lifted to a relatively high position. Moreover, as the guide rail 18, the length of the support plate 12 is about 2
Since only one pair of left and right guide rails 18 each having a length about twice as long as the guide rails 18 are required, the number of times of transfer is about half that of the conventional apparatus. Also,
Since the crane C is directly attached to the tower body 10 during cargo handling, the load of suspended load does not act on the guide rails 18.
The guide rail 18 can be made smaller and lighter. Therefore, the handling of heavy objects at a high place during lifting is significantly reduced, the labor and time required to lift the crane C are significantly reduced, the operating rate of the crane C is significantly improved, and the construction period can be greatly shortened. Becomes In addition, the cost of manufacturing the lifting device is low.

A rack is formed on the outer surface of the guide rail 18, and a guide shoe of the support plate 12 is provided with a pinion that meshes with the rack and is driven by a driving device such as a motor.
The guide rail 18 may be moved upward by a pinion mechanism.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a side view showing a tower and a crane being installed, and FIG. 2 is a perspective view of a main part of the crane attached to the tower and a lifting device. FIG. 3 is a perspective view of an essential part showing a situation during raising. C: Crane, E: Lifting device, 10: Tower, 11
…… Crane mounting bracket, 12 …… Support plate, 17 ……
Mounting bracket for guide rail, 18 …… guide rail,
19 …… Pulley block, 20 …… Pulley block, 21 …… Guide pulley, 22 …… Raising winch, 23 …… Wire rope.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kuniaki Matsumoto 8 Niijima, Harima-cho, Kako-gun, Hyogo Kawaju Construction Co., Ltd. West Branch Co., Ltd. (72) Yoshihiro Takuda 8th Niijima, Harima-cho, Kako-gun, Hyogo Kawaju Construction Seibu Branch Co., Ltd. (56) Reference JP-A-59-158794 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A hoisting device for hoisting and moving a tower erection crane along a guide rail via a wire rope, wherein the guide rails are provided at a predetermined horizontal interval on the outer surface of the side wall of the tower body. A pair of vertically extending guide rails is provided, and a pair of guided parts that are vertically slidably guided by a pair of guide rails are provided in the crane main body of the tower erection crane. A plurality of mounting brackets for fixing the crane body to the section and a plurality of mounting brackets for fixing the pair of guide rails to the side wall portion of the tower body are independently provided, and the crane body and the guide rail member are provided. And each of them can be independently fixed directly to the side wall of the tower, and the pulley blocks are equipped as an integral structure on the upper ends of the pair of guide rails. Equipped with a pair of pulley blocks on the crane body so as to correspond to the lower side of the car block, and hang a wire rope in multiple turns over each pulley block of the guide rail and the corresponding pulley block on the crane body side. A hoisting device for a tower erection crane, characterized in that the crane body can be hoisted by winding a pair of the wire ropes by a pair of winches mounted on the crane body.