JPS58162495A - Method of connecting mast in lower extending type climbing crane - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for connecting a mast in a bottom-addition type climbing crane that connects a bottom-additional mast to the bottom of the lowest mast.

Next, an example of a conventional climbing crane for constructing steel towers will be explained using IML or 6 diagrams.

The lower end of a crane mast (hereinafter referred to as "mast") 10 is installed on the mount C base] 5, and left and right base masts (masts for supporting lifting equipment) 9 are installed. Horizontal pattern extending between the top of the base mast 9 and the main pillar 1 of the steel tower @ 4
, supported by cultivated field branch line 3. The middle part of the mast 10 is supported by mast guides 2#, which are supported by branch lines at vertical intervals in the center of the steel tower.
As shown in figure C, a plurality of mast guides 2 are installed to support the steel tower as the steel tower is constructed.

A climbing o-beam 8 extended from a climbing winch 7 installed on a pedestal 5 is connected to an elevating frame 6 that is moved up and down relative to the left and right base masts 9. As shown in FIG. 6, in the middle of the climbing rope 8, there are a sheave group 24 installed on the upper frame of the base mast 9 and a sheave group 24 installed on the elevating 7 frame 6.
8, and the terminal portion is fixed to the upper frame 1B of the base mast 9.

As shown in FIG. 2, a lower frame 11, a middle frame 12, and an upper frame 13 are provided at the upper part of the mast IO, and a hoisting winch 14 and an elevating winch 15 are installed on the upper frame 13. The human frame 16 is fixed, and the jib 17 is attached so as to be undulating.

A hoisting rope 19 let out from the hoisting winch 14 is suspended from a sheave at the tip of the jib 17, and a hook 18 is attached to the end of the hoisting rope 19. An elevating rope 20 extended from the elevating winch 15 is connected to the tip of the jib 17.

As the construction of the steel tower progresses, the crane will be climbed in the following manner. First, set the jib 17 in an upright position.
Stand up and get into a climbing position. Next, connect the lifting frame 6 and the mast lO with the bolt pin 22 (see Fig. 4).
The climbing winch 7 is operated in the hoisting direction to raise the mast 10 as shown in Fig. 3. After that, the additional mast IOA, which had been installed in advance on the carrier (truck) 21, was raised to the mast l.
Move it directly under O and set it in place. Then, the climbing winch 7 rotates in the lowering direction to lower the lifting frame 6, and connects the upper end of the IOA to the mast 10.
(i.e., mass) with a connecting pin 23 to the lower end of the
Fit the fitting protrusion tl on the top end of IOA into the square hole lOa at the bottom end of 10, and connect both fitting parts with the connecting pin 2.
Connect with 3. In this state, the elevating frame 6t is slightly raised, the carrier 21 is added, removed from the lower end of the mast IOA, and returned to its original position. And cannusac bottle 22
, lower the elevating frame 6t, and attach it to the frame 5.
Place it on top. The climbing work is now complete.

Generally speaking, a single mast that can be placed on a 50t, m@ climbing crane weighs approximately It-1.5, and putting it on a carrier and pushing it to the connecting position is quite a heavy labor. It requires 2.3 manpower. Also, the mast connecting pin must be layered at high altitudes. In addition, a carrier must be provided that can withstand the weight of the mast, which increases the cost and transportation costs. Incidentally, climbing cranes that operate on steel towers are often operated in mountainous areas, and their parts are mainly transported by cableway or helicopter, so transportation costs account for a large proportion of the total construction cost. Furthermore, when placing the replenishing mast on the carrier, it is necessary to first put the mast in an upright position and then attach a sling to the top of the mast. Therefore, work efficiency and safety are poor.

The purpose of this relaxation is to provide a method for easily and safely connecting additional masts.

One embodiment of this invention is described below! This will be explained with reference to FIGS. 7 to 12. In those figures, Figures 1 to I
Items with the same reference numerals as those in Figure N6 represent the same or equivalent items.

As shown in Fig. 1θ, a link-shaped connecting insertion protrusion @2S with a pin hole 25a is attached to the upper end of the IOA by two fixing pins 26.
At the lower end of the masts 1 and 0, a half-split insertion hole (negative hole) 27 is formed into which a coupling insertion protrusion @2% is inserted, and a half-split groove 27 is formed in the side wall portion where no groove is provided. is pin hole 2
A pin hole 27b is provided for matching 5a. The half-split groove 27m is designed such that the central connecting portion z5 can be inserted from directly below or from the side.

Replenishment The addition of the mast IOA is performed as follows.

(a) Suspend the supplementary mast 10At with the hook of the climbing crane, or with the hook of another crane, position the connecting insertion protrusion 25 on the side of the mast 10, and place it on the pedestal 5. (b) The mass (b) 10 that has been raised in advance for connection work is lowered via the elevating frame 6, and the insertion protrusion 25f for connection is located on the upper side.

Insert the connecting pin 2 into the half-split groove 2ya of the mast 10.
8 into the bottle holes 27b and 25a to connect both parts to each other (see Fig. 6).

(C) By raising the lifting frame 6, the addition mast IOA is raised until it is almost vertical, and then manually pushed to - 10 and addition mast IOA)
Connect with IOA.

(d) Other bottle holes 27 in which the connecting pin 28 is not inserted
b. Insert the connecting pin 26 into 258 and open the inside G.
Connect items. Pin hole 2 provided in the connecting pin 26
A split pin 29 is inserted into each of the connecting pins 8a to prevent each connecting pin 2B from being pulled out. Figure 11 and jlK12 are additional squares) IOA is completely connected to square 1G [connected with connecting pins z & 1].

shows.

The above is the order of the mast connection operations, but when dismantling the crane, the operation of removing the four masts can be performed in the reverse order.

According to the invention described above, the following effects S can be obtained.

(1) Since there is no need to push the additional mast to the connecting position while it is attached to the carrier, there is no need for labor and maintenance, and the manufacturing cost and labor costs are reduced. I11 expenses can be reduced.

(2) Conventional method 1 is used for attaching and detaching connecting pins at high places.
(3) Slinging work to the additional mast can be done with the additional mast (laying it down on its side), improving work efficiency and improving safety. Umbrella by increasing the.

[Brief explanation of drawings]

Figure 1 is a front view showing a steel tower assembled with a conventional climbing crane for building steel towers, Figure 2 is a front view showing a climbing crane, Figure 3 is an enlarged front view showing the lifting device in Figure 2, and tK4. The figure is a front view of figure 3, 5th
The figure is a perspective view showing the connection S between the lower end of a conventional mast and the upper end of a supplementary mast. The figure is a front view showing a state in which the additional mast according to the present invention is laid down on its side and connected to the connecting part on one side of the mast with a connecting pin,
Figure 6 is a side view taken from line ■-■ in Figure 7, Figure 9 is a 111th view showing the state in which the mast has been added to the state in Figure 8 and is pulled up diagonally through the lifting frame; The figure is a perspective view showing the connecting part between the lower end of the mast and the upper end of the additional mast according to this invention number ζ, the connecting pin s: 5r connecting it, and the cotter pin attached to the connecting pin - No. 11
The figure is a front view showing the state in which the connection of the additional mast to the twisted mast has been completed according to the method of the present invention, and FIG. 12 is a side view seen from the cutting line of the iris 11. 1. Steel tower main pillar, 3. Cultivated land branch line 1.4, Φ horizontal ground support, 5. Frame, 6. Lifting frame,
7. Hibiki climbing winch, 6..Climbing rope, 9..Base mast, 10..Crane mast, IOA..Additional mast, 14.-Hoisting winch, 15..Elevation winch, 16.
...A frame, 17-.Jib 19-.Hoisting rope, 20..Elevation rope, 21-.Carrier, 24A, 24B.. Sheave group, 25-.Insertion protrusion for connection, 25a..Bottle hole. 26...fixing pin,
27・Φ half-split insertion hole, z7a-e half-split groove, 27b: Bottle hole, 2b: Connecting pin,
29・-Cotter pin Fig. 1 Fig. 3 Fig. 4 ■ Fig. 5

Claims (1)

[Scope of Claims] A method for assembling a mast in a T1 climbing crane, which includes the following steps (a) to (d). (a) The process of hoisting the supplementary mast with the connecting insertion protrusion provided at the end of the connecting side using a crane, positioning the connecting insertion protruding part along the crane mast side G, and installing it horizontally on the pedestal, ( b) A half-break insertion hole into which the connection insertion protrusion of the supplementary mast is inserted is formed at the lower end, and a connection pin hole is provided in the wall where the half-break groove of the half-break insertion hole is not provided. The process of lowering the assembled mast via the lifting frame, inserting it into the insertion hole through the half-split groove of the connecting insertion protrusion St located on the upper side, and connecting both parts to each other with the connecting pin, (C ) The step of raising the elevating frame together with the mast and raising the mast until it is almost vertical; (d) Inserting the uninserted continuous line insertion protrusions W into the opposing insertion holes, The process of connecting parts to each other with pins,