JPS6038626Y2 - Climbing crane mast connection guide - Google Patents

Description

[Detailed explanation of the invention] This invention raises the mast via an elevating frame,
This invention relates to a guide tool for connecting a mast in a climbing crane, which connects the upper end of an additional mast to the lower end of the mast.

Next, an example of a climbing crane for constructing steel towers according to this invention will be explained with reference to FIGS. 1 to 4 and FIG. 10.

The left and right base masts (masts for supporting lifting equipment) 9 installed on the pedestal 5 have ground branch lines 4 and diagonal branch lines 3 stretched between the tops of the pedestal 5 and the base mast 9 and the tower main material 1, respectively.
Supported by

A climbing rope 8 extended from a climbing winch 7 installed on a frame 5 is connected to a lifting frame 6 that is raised and lowered relative to the left and right base masts 9 via a central roller 28 and side rollers 29.

A midway portion of the climbing rope 8 is wrapped around a plurality of sheaves attached to the upper part of the base mast 9 and the lifting frame 6.

A mast 10, which is the main body of the climbing crane, is installed on a pedestal 5 and includes a plurality of mast guides 2.

At the top of the mast 10 there is a lower frame 11 and a middle frame 12.
, an upper frame 13 is provided, a hoisting winch 14 and an elevating winch 15 are installed on the upper frame 13, an A frame 16 is fixed, and a jib 17 is attached so that it can be raised and lowered. .

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.

Climbing of the crane will be carried out as construction of the steel tower progresses.

That is, the mast 10 is raised, and the mast IOA is connected to the lower end of the mast 10.

The mast guides 2 are attached to the steel tower at vertical intervals and receive the mast 10.

There is a structural gap X and y (see Figure 10) between the base mast 9 and the lifting frame 6 that connects the mast 10, and the jib 17 is heavy to install, so when connecting the additional mast 10A, , the mast 10 tilts as shown in FIG.

Therefore, it becomes impossible to connect the mast 10 and the additional mast IOA.

That is, both masts 1 are connected by the connecting pin 23 shown in FIG.
0. IOA binding becomes impossible.

For this reason, two or three workers climbed the base mast 9 and
The upper part of the replenishing mast IOA is pushed and pulled manually, and the lower part of the replenishing mast 10A is pried with a special tool (for example, a crowbar, etc.) to align the pin holes and connect with the connecting pin 23.

Therefore, workability is poor and safety is compromised.

The purpose of this invention is to provide a mast connection guide tool that can easily connect the lower end of a mast and the upper end of a supplementary mast.

The mast connection guide of this invention raises the mast via a lifting frame that raises and lowers it relative to the base mast.
In a climbing crane that connects the upper end of the mast to the lower end of the mast, the cross section is L-shaped, with side surfaces that match the outer surfaces of two adjacent sides of the connecting square section at the lower end of the mast, which has a square cross section. A mast is provided with a side plate and a pin inserted into a pin hole at the lower end of the mast, which is integrally installed in a direction perpendicular to one side of the side plate, and a guide plate is formed at the lower end of the side plate, which is inclined outward. It is characterized by

Hereinafter, one embodiment of this invention will be explained with reference to FIGS. 5 to 11.

In these figures, the same reference numerals as in FIGS. 1 to 4 represent the same or equivalent items.

As shown in FIG. 7, a square hole 10a is provided at the lower end joint of the mast 10, and a fitting protrusion 3 that fits into the square hole 10a is provided at the upper end joint of the supplementary mast 10A.
1 is installed.

A bolt pin 22 is provided in the center of the lifting frame 6, and a hook 27 is attached to the side portion.

The mast connecting guide 2 according to this invention is attached to the hook 27 for hanging.
The end of the chain 25 connected to 4 is hooked.

The mast connection guide 24 includes a side plate 24a having an L-shaped cross section and a side plate 24a having side surfaces that match the outer surfaces of two adjacent sides of the connecting square portion at the lower end of the mast 10, and a side plate 24a that is integrally installed with the side plate 24a. Pin 24 inserted into the pin hole at the lower end of 10
A guide plate 24c that is inclined outward is formed at the lower end of the side plate 24a.

The pin 24b is integrally provided in a direction perpendicular to one side surface of the side plate 24a, and has a pin hole in which a pin 26 to prevent removal is attached.

At least two mast connection guides 24 are installed, as shown in FIG. 10.

Note that rollers 30 for guiding the mast 10 are attached to a frame fixed to the upper end of the base mast 9.

The mast 10 and the additional mast IOA are connected via the mast connection guide 24 according to this invention as follows.

After the jib 17 is upright, the lifting frame 6 and the mast 10
are connected by a bolt pin 22, and the climbing winch 7 is rotated in the hoisting direction to raise the mast 10.

Next, the supplementary mast IOA, which has been installed in advance on the carrier 21, is moved to almost directly below the mast 10 and placed in place.

Insert the pin 24b of the mast connecting guide 24, which is hooked to the lifting frame 6 with a chain 25, into the pin hole at the lower end of the mast 10, and also attach the side plate 24a to the mast 1.
Join it to the side of the joint part of 0.

A retaining pin 26 is attached to the pin 24b.

Then, the climbing winch 7 is rotated in the lowering direction to lower the elevating frame 6.

As the elevating frame 6 descends, the additional mast IOA is forcibly pulled to the center of the mast 10 via the guide plate 24c1 fitting protrusion 31, and the additional mast 10
The lowering of the elevating frame 6 is stopped when the tip of the fitting protrusion 31 of A fits into the square hole 10a of the mast 10.

After removing the mast connection guide 24 from the mast 10 and hooking it to the hook 27 of the lifting frame 6, align the engagement holes of the mast 10 and the fitting protrusion 31 of the additional mast IOA. and connect the mast 10 with the connecting pin 23.
Connect the additional mast 10A.

Here, the lifting frame 6 is slightly raised, and the carrier 2
Add 1 and remove it from the bottom of the mast IOA and return it to its original position.

The bolt pin 22 is removed, the elevating frame 6 is lowered, and it is installed on the pedestal 5.

The climbing work is now complete.

As mentioned above, if the mast connecting guide 24 of this invention is always hooked to the hook 27 of the elevating frame 6, there is no need to carry it as a connecting tool during use.

It goes without saying that the hook 27 may be provided on the mast 10.

According to this invention explained above, the following effects can be obtained.

(1) Climbing time, which greatly affects the performance of a climbing crane, can be significantly shortened.

(2) The dangerous position adjustment work conventionally performed by workers using tools such as crowbars is no longer necessary, and safety can be improved.

(3) The mast connection guide has a simple structure and can be manufactured at low cost.

[Brief explanation of the drawing]

Figures 1 and 2 are side views showing an example of a climbing crane for constructing steel towers related to this invention, Figure 3 is an enlarged side view showing how the additional mast is connected in the climbing crane of Figure 1, and Figure 4 is An enlarged perspective view showing part ■ in FIG. 3; FIG. 5 is a side view showing an embodiment of the invention;
FIG. 6 is a view seen from line VI-VI in FIG. 5, FIG. 7 is an enlarged perspective view showing the section ■ in FIG. 5, and FIG. 8 is a perspective view showing the mast connection guide according to this invention. Figure 9 is I of Figure 5.
FIG. 10 is an enlarged sectional view taken along line X-X in FIG. 5, and FIG. 11 is a side view of FIG. 10. 5... Frame, 6... Lifting frame, 7
... Climbing winch, 8 ... Climbing rope, 9 ... Base mast, 10
......Mast, 10a...Square hole, IOA
......Additional mast, 17...Jib,
21...Carrier, 22...Lock pin, 23...Connection pin, 24...Mast connection guide, 24a...Side plate , 24b・
...Pin, 24c... Information board, 25...
...Chain, 26...Removal stop pin, 27
...Latching hook, 31... Fitting protrusion.

Claims (1)

[Scope of utility model registration request] In a climbing crane that raises a mast via an elevating frame that raises and lowers it relative to a base mast, and connects the upper end of the mast to the lower end of the mast,
The cross section of the mast, which has a square cross section, has side surfaces that match the outer surfaces of two adjacent sides of the connecting square part at the lower end of the mast.
It is equipped with a shaped side plate and a pin that is inserted into a pin hole at the lower end of the mast, which is integrally installed in a direction perpendicular to one side of the side plate, and a guide plate is formed at the lower end of the side plate that slopes outward. A mast connection guide tool characterized by: