JP3230104B2 - Tower crane - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tower crane provided with a lifting device that uses a mast as a pillar of a building after use.

[0002]

2. Description of the Related Art A tower crane used in the construction of a high-rise building uses its mast as a pillar of a building after use. By the way, this tower crane is equipped with a lifting device for lifting. In a conventional tower crane, a steel pipe is used as a mast, and an insertion hole for a lock pin of an elevating device is opened in the steel pipe at equal intervals in the height direction. On the other hand, the elevating device has two frames, upper and lower, each of which is composed of a frame body just covered with the steel pipe, and these frames are connected to each other with a climbing jack so as to be extendable and contractible. Further, the upper and lower frames are provided with lock pins configured to be protruded and housed so as to fit into the insertion holes of the steel pipe. When the lifting device is moved up and down, the rocking pin of the upper and lower frames is inserted in place of the steel tube insertion hole at the same time as the climbing jack is repeatedly extended and retracted, and the weight of the lifting device is inserted into the steel pipe through the lock pin. While leaving, move up and down like a scale insect.

[0003]

The above-mentioned conventional tower crane has the following problems. <B> The steel pipe on which the elevating device moves up and down needs an insertion hole for the lock pin. When the steel pipe is used as a pillar of a building, the insertion hole must be closed and the work process is complicated. there were. <B> If there is a protrusion on the outer peripheral surface of the steel pipe, the elevating device cannot be moved up and down, so that the beam connection required for the column cannot be attached to the steel pipe in advance. Therefore, the beam connection or the beam must be directly welded to the steel pipe erected on the site, which causes a reduction in work efficiency.

[0004]

SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned problems. The purpose of the present invention is to eliminate the need for a lock pin insertion hole, and to provide a structure along a mast having a beam connection. It is an object of the present invention to provide a tower crane that can move a lifting device up and down by moving the building beam efficiently and economically.

[0005]

[Means for solving the problems] That is, the present invention relates to a tower crane that uses a mast as a pillar of a building. A tower crane comprising a telescopic elevating device in which a frame and a lower frame are connected by a jack, wherein the upper frame and the lower frame are hung on the beam connection to move up and down like a scale along the mast. It is.

[0006]

An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the tower crane 1
Is a mast 2 having projecting beam connections 22 at equal intervals in the height direction.
And an elevating device 3 that moves up and down along the mast 2, and a boom 4 and an operation room 5 installed above the elevating device 3. Hereinafter, each part will be described in detail. <A> Configuration of Mast (FIGS. 2, 4 and 5) As shown in FIG. 2, the mast 2 is composed of a column 21 made of a steel pipe having a rectangular cross section, and a column 21 in the height direction. It is formed by beam connections 22 projecting at intervals. In this embodiment,
In some cases, the beam connections 22 are projected in four directions on the four surfaces of the column 21. The mast 2 thus configured is used as a pillar of a building after use, and is also used as a moving path of a lifting device 3 described later. Beam connection 22, mast 2,
It is a portion attached as a joint of a beam 24 of a building that is erected horizontally between the two, and can be used as a hanging member when the elevating device 3 is moved, and is made of, for example, H steel. Also, as shown in FIGS. 4 and 5, the V
A pedestal 25 having a U-shaped groove may be provided.

<B> Elevating Device (FIGS. 1 and 3) As shown in FIG. 3, the elevating device 3 includes an upper frame 31, a lower frame 32, a climbing jack 33, a lock pin 34, and a guide roller 35. It consists of. The upper frame 31 and the lower frame 32 are formed of a frame, and are exteriorly provided with the mast 2 penetrating therethrough. That is,
It is located on the outer peripheral surface of the beam port 22 and is formed so as not to contact the beam port 22. The upper frame 31 and the lower frame 32 each have a guide roller 35 mounted on a corner thereof and a lock pin 34 provided therein. The guide roller 35 has a wheel provided with a groove in the center. This guide roller 3
Numeral 5 is a portion that matches the corner of the column 21 of the mast 2 and keeps the distance between the lifting device 3 and the mast 2 constant and prevents the rotation of the lifting device 3 in the horizontal direction. The lock pin 34
Projections are provided inside the upper frame 31 and the lower frame 32, and the jacks are provided at the bases of the upper frame 31 and the lower frame 32 so as to project horizontally and to be freely stored. The climbing jack 33 is a jack that connects the upper frame 31 and the lower frame 32 to be able to expand and contract. The upper frame 31 is expanded and contracted so that the climbing jack 33 has at least the length of one section of the beam connection 22 and 22 of the mast 2 at the time of contraction and the length of two sections of the beam connection 22 and 22 at the time of extension. And the distance between the lower frame 32 and the lower frame 32 can be adjusted. As shown in FIG. 1, a scaffold 3 is provided around the upper frame 31 and the lower frame 32.
6 may be provided.

<C> Boom and Operation Room (FIG. 1) The boom 4 is a device for lifting and transporting building members such as the beam 24, and can be used as a known device. Operation room 5
Controls the operation of the lifting device 3 and the boom 4. The boom 4 and the operation room 5 are mounted on the upper frame 31 of the lifting device 3 and move up and down together with the lifting device 3.

[0009]

Next, an operation method of the tower crane 1 will be described. <A> Mast Standing (FIGS. 1 and 6) As shown in FIG. 1, the climbing jack 3 of the elevating device 3 is contracted, and the lock pins 34 of the upper frame 31 and the lower frame 32 are protruded. Is hooked on the receiving table 25 of the beam connection 22 of the mast 2. Then, as shown in FIG. 6, the mast 2 is separately lifted and connected to the extension above the mast 2 on which the lifting device 3 is hung by the crane 4.

<B> Movement of the lifting device (FIGS. 6 and 7) In FIG. 6, the lock pin 34 of the upper frame 31 is stored. Then, the climbing jack 33 is extended to move the upper frame 31, the boom 4, and the operation room 5 upward. The extension of the climbing jack 33 is adjusted so that the lock pin 34 of the upper frame 31 is located above the upper beam connection 22. Next, the lock pin 34 of the upper frame 31 is protruded to be hooked on the pedestal 25 of the beam connection 22. Then, the lock pin 34 of the lower frame 32 is stored, the climbing jack 33 is contracted, and the lower frame 32 is raised. When the lower frame 32 is raised to the upper beam connection 22, the lock pin 34 is protruded,
The beam connection 22 is hung on the receiving table 25, and the movement of the lifting device 3 is completed. In this way, the building is constructed by repeating the standing of the mast 2 and the movement of the lifting device 3.

[0011]

As described above, the present invention has the following effects. <B> Since the lifting device is moved up and down by hanging the beam connection projecting from the mast, there is no need to open a lock pin insertion hole in the mast as in the conventional case. Is also unnecessary. <B> Since the beam connection can be attached to the mast in advance, the work of welding the beam connection to the mast erected on site as in the past can be omitted, and the work of erection of the building beam can be performed very efficiently. Can be.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a tower crane.

FIG. 2 is a perspective view of a mast.

FIG. 3 is a perspective view of a lifting device.

FIG. 4 is a sectional view of a lifting device and a mast.

FIG. 5 is a side view of a lifting device and a mast.

FIG. 6 is an explanatory view of moving a tower crane.

FIG. 7 is an explanatory view of moving a tower crane.

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B66C 23/32

Claims (1)

(57) [Claims] 1. A tower crane using a mast as a pillar of a building, wherein a beam connection of the building is extended at intervals in a height direction of the mast, and the upper frame and the lower frame are connected by a jack. A tower crane, wherein the telescopic elevating device is configured so that an upper frame and a lower frame are hung on the beam connection to move up and down like a scale along a mast.