JPS6213276B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a method for assembling a gantry crane,
In particular, two running rails are installed on the floor in the depth direction of the building, and the four running rails run on these running rails.
Posts (for 4 clubs, 4 hooks) or 2 posts (for 2 clubs, 2 hooks)
are placed in an upright position, and two girder rails for guiding the wheels of the club in a gate-like manner are stretched over these posts, separated by the distance between the wheels of the club, and a hoist and a This relates to the method of assembling a gate-type crane that is equipped with a lifting hook for hoisting and lowering, and is used for carrying various machines and equipment into buildings, installation work, etc., and eliminates the need for a trolley rope to prevent falls when assembling the post. west,
In addition, it is intended to enable the mounting of a traversing club on the girder rail in a place with a low building ceiling.

[Prior art]

The prior art and its problems will be explained with reference to FIGS. 1 to 3. Figure 1 shows how it is assembled and used inside the building.
Conventional 2 club, 2 hook type, carrying capacity 100
FIG. 2 is a top view and a front view showing an example of a gantry crane. This type of gantry crane is used when transporting and installing various types of heavy machinery and heavy equipment into buildings, and is assembled when transporting and installing heavy machinery, and after transport and installation are complete. Then it will be dismantled again. The assembly of this gantry crane in a building is normally carried out in the following order. Two running rails 2, 2' are installed on the floor 1 in the building in the depth direction of the building, and posts 3, 3' run on these running rails.
But first, it is erected. In this case, to prevent the posts from tipping over, use the method shown in Figure 2 (this figure shows a 4-club, 4-hook system in which 4 posts are used.
Wires 11 to 18 called tora ropes shown in the figure (which is a 200-ton gantry crane) are strung diagonally between the upper fulcrum of each post and the fulcrum on the floor. Next, two girder rails 4, 4' are mounted on the two left and right posts so as to form a gate shape. (In the illustrated example, four traversing wheels are provided for each traversing club). Now, the two left and right posts can stand on their own using the girder rails, so the tiger rope 1 is stretched to prevent falls.
1 to 18 are removed. Next, two transverse clubs 5, 5' are placed on the two girder rails 4, 4'. Although not shown in FIG. 1, each of the traversing clubs 5, 5' is equipped with a hoist whose operation is controlled by commands from the ground and a lifting hook for hoisting and lowering. In addition, ₃₀
and 3 ₀ ′ are post travel drive units each having wheels for travel at the lower end and posts 3 and 3 ′ attached to the upper portion, respectively.

FIG. 3 is a diagram illustrating the work procedure when placing the conventional transverse clubs 5, 5' on the girder rails 4, 4', and is a side view of FIG. 8 is a hanging hook for hoisting and lowering the traversing club 5 attached to the lower part of the traversing club 5, 8 is a hanging hook used when placing the traversing club 5 on the girder rails 4 and 4', and 9 is the above-mentioned mounting operation. 10 indicates the ceiling of the building, and 3 and 3' indicate posts as in the case of FIG. Conventionally, as shown in the figure, the transverse club 5 is lifted by a crane 9 until the lower end of the lifting hook 7 reaches a height exceeding the upper ends of the girder rails 4, 4', and while the transverse club 5 is moved in the direction of the arrow shown in the figure, The traversing club 5 is placed on the girder rails 4, 4' by operating the lifting hook 8 of the crane 9 so that the traversing wheels 6, 6' (Fig. 1) are placed on the girder rails 4, 4'. I left it there.

However, the conventional assembly method as described above has the following problems. That is, the first problem is the method of tensioning the ropes 11 to 18 to prevent the posts from falling over, so it is necessary to allow for a certain distance between the running rails 2, 2' and the side walls of the building. , traveling rail 2,
The problem is that the wire 2' cannot be laid too close to the side wall of the building. The second problem is that, as explained in FIG. 3, the crane 9 is used to place the horizontal club until the lower end of the hanging hook 7 exceeds the upper end of the girder rails 4, 4'. Since the assembly procedure involved hoisting and then moving the transverse club in the direction of the arrow, there was also a minimum length limit on the hanging hook attached to the bottom of the transverse club 5, which meant that it could not be made any shorter. Therefore, the height h shown in the figure, that is, the height of the transverse club 5 from the upper end of the girder rails 4, 4'
The height h to the upper end must be allowed for the amount necessary for the above-mentioned mounting work, and the horizontal club mounting work in a place where the height H from the girder rails 4, 4' to the ceiling 10 is low is required. The problem is that it is difficult to To give a specific example, in the case of a 100-ton portal crane with two clubs and two hooks, the height of the transverse clubs 5 and 5' is approximately 100 cm, and the height of the hanging hook 7 is approximately 100 cm.
The shortest length that can be shortened is approximately 150 cm. Therefore, in order to enable the above-mentioned horizontal club mounting operation, it is necessary to allow the height h to be approximately 300 cm. The height H from the ceiling to the ceiling 10 must be at least 500cm, whereas the height of a 100-ton gantry crane is approximately 1000cm.
However, with the gate type crane using the conventional assembly method described above, there were problems such as it was necessary to allow for wasted space in the ceiling, and it was difficult to assemble in a place with a low building ceiling.

[Purpose of the invention]

The purpose of the present invention is to solve the above-mentioned problems with the prior art, eliminate the need for a rope to prevent falling when assembling a post, and furthermore, provide a gate that enables horizontal club mounting work in areas with low building ceilings. The purpose of the present invention is to provide a method for assembling a type crane.

[Summary of the invention]

In order to achieve the above object, the features of the present invention are as follows:
One of the two girder rails is removably attached to the post travel drive unit, which is equipped with wheels for travel at the lower end and posts are attached to the top, respectively, to form a small gate shape. Attach the posts upright above the post travel drive, and attach the remaining girder rail to the upper ends of these two posts, then attach the one girder rail used to form the small gate shape mentioned above. Remove the club and attach it to the upper end of the post, lift the club whose total length in the transverse direction is smaller than the internal measurement of the gap between the two girder rails, pass it vertically between the two girder rails, and then move it transversely. The purpose is to rotate the club 90 degrees and place the transverse club on two girder rails.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to FIGS. 4 and 5. Figure 4 shows a 4-club, 4-hook type
FIG. 2 is an explanatory diagram of a working method for a 200-ton portal crane according to an embodiment of the present invention, which eliminates the need for a rope to prevent falling during post assembly. first,
One of the two girder rails (in this embodiment, there are four girder rails in total, so two of the four girder rails) is connected to the post traveling drive unit 30, 30'.
The post 3 is removably attached to the side surface of the post, for example, by fastening bolts or nuts to form a small gate shape, and then the post 3 is attached to the top of the post travel drive section 30, 30'.
3' upright, fix the lower end of the post and the upper end of the post traveling drive part with bolts, put the remaining girder rail on the upper end of each post 3, 3', and then Remove the girder rail used to form the portal from the small portal and attach it to the top of the post.

Next, according to FIG. 5, in the embodiment of the present invention,
The method of placing a club in a rampant position will be explained. In FIG. 5, 21 is a pulley suspended from the ceiling 10 of the building, 22 is a wire that winds up and lowers the traveling club only in the vertical direction via the pulley 21 and the hanging hook 8, and the other symbols are the same as in FIG. Same as in case. However, in FIG. 5, the overall length W ₁ of the transverse club 5 in the transverse direction is smaller than the inner distance W ₂ between the two girder rails 4, 4'. Therefore, if the transverse club 5 is rotated by 90 degrees from the state immediately before it is placed on the girder rails 4, 4', it will be in the 5" state shown in the lower part of FIG. 5, and the hanging hooks 7, 8 are 7″ each,
8". In this state of 5", since W ₁ is smaller than W ₂ , the transverse club 5" can be passed vertically between the two girder rails 4, 4", and therefore, The transverse club 5'' is hoisted up by the wire 22 via the hoisting hook 8'' and the pulley 21 in the direction of the dashed arrow (up and down) shown in the figure, passing between the two girder rails 4 and 4', and the lower end surface of the transverse club is raised to the girder rail. If the transverse club is rotated by 90 degrees at a position slightly beyond the upper end surface, the transverse club will be in the state shown in FIG.
The work of placing it on 4' is completed. If the above mounting method is used, the height h' from the top end of the girder rail to the top end of the transverse club required to place the transverse club 5 on the girder rails 4, 4' is as shown in Fig. 3. In this case, the required height h≒300cm is lower than h′≒120cm, and therefore the required height from girder rails 4, 4′ to ceiling 10 is
H' is also the height H≒500 that was required in the case of Figure 3.
cm, H′≒200cm, making it possible to place the club in a low place on the ceiling of the building, reducing wasted ceiling space.

〔Effect of the invention〕

As explained above, according to the present invention, there is no need for a rope to prevent falls when assembling the post of a gantry crane that is assembled and used inside a building, so the gantry crane can be assembled even in a building with a small width dimension. As well as improving work safety,
In addition, since this assembly method can reduce the height from the girder rail to the building ceiling, which is required when placing a club in a rampant position, it is possible to place the club in a place with a low building ceiling. It is now possible to raise the height of the crane post without leaving wasted space, which has the effect of improving the safety of carrying in and installing heavy machinery.

[Brief explanation of the drawing]

Figure 1 is a top view and front view of an example of a gate type crane installed indoors, Figure 2 is a front view and top view illustrating the conventional post assembly work using a trolley rope to prevent overturning, and Figure 3 is a FIG. 4 is an explanatory diagram of a conventional transverse club mounting operation, FIG. 4 is an explanatory diagram of a post assembly operation according to the present invention, and FIG. 5 is an explanatory diagram of a transverse club mounting operation according to the present invention. Explanation of symbols, 1...Building floor, 2, 2'...Traveling rail, 3, 3'...Post, 3 ₀ , 3 ₀ '...
Post travel drive unit, 4, 4'...Girder rail, 5, 5', 5''...Transverse club, 6, 6'...
Traversing wheel, 7,7″,8,8″…Hanging hook, 9
...Crane, 10...Building ceiling, 11-18...
...Tra rope, 21... Pulley, 22... Hoisting and lowering wire.

Claims (1)

[Claims] 1. Two girder rails for guiding the traversing wheels of a traversing club equipped with a hoist and a hanging hook for hoisting and lowering are stretched in a gate shape on two upright posts separated by the distance of the traversing wheels, and the above-mentioned In the method of assembling a gate-type crane, which is used for transporting various machines, equipment, etc. indoors, installation work, etc. by running a post on a running rail laid on the floor of a building, the crane is equipped with wheels for running at the lower end. One of the two girder rails is removably attached to the post travel drive on which each post will be attached to form a small portal, and each post is then mounted above the post travel drive. Installed in an upright position,
Attach the remaining girder rail to the upper ends of these two posts, then remove the one girder rail used to form the small gate shape and attach it to the upper ends of the posts. Lifts a transverse club made smaller than the inner dimension of the gap between the two girder rails, passes it vertically between the two girder rails, then rotates the transverse club 90 degrees and moves it transversely on the two girder rails. A method for assembling a gate-type crane characterized by placing a club thereon.