JPS6320757B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a tower crane with a trolley, and in particular, the present invention relates to a tower crane with a trolley, in particular, a tower crane with a trolley that rises along a support, and a tower crane that raises the support while fixing the position of the raised trolley. This invention relates to a tower crane with a trolley that can be moved to a high place and easily lowered by repeating this process.

[Conventional technology]

Traditionally, when building high-rise buildings, truck cranes have been used to assemble steel frames, and large tower cranes have been installed inside the building to proceed with construction work, and the tower cranes have been dismantled after the construction work is completed. A construction method has also been adopted in which the space is then used as elevator space.

[Problems to be solved by the invention] As mentioned above, when using a truck crane, a place is required to install it, but since the site itself is narrow and limited in urban areas, public roads must be temporarily rented. Therefore, there was a risk that it would not only cause an obstruction to transportation, but also pose a danger to ordinary pedestrians. In addition, in the method of assembling steel frames using a truck crane, a boom of sufficient length and a working radius are required to cover the entire construction area with the tip of the boom facing above the structure. There was a problem that it had to be secured.

On the other hand, when using a large tower crane, it takes a lot of time and money to dismantle it and lower it to the ground after the construction is completed, so there are disadvantages that the construction period is long and extra construction costs are required. Ta.

[Means for solving problems]

The present invention solves the above problems and has a simple structure,
It was developed with the aim of providing a tower crane with a trolley that can be easily operated and can ascend by itself from the ground to the second, third, and other upper floors, and then descend by itself. As a specific means for this purpose, a through hole is formed in the trolley that passes vertically, a guide pipe is set up on the periphery of the through hole so as to communicate with the through hole, and a column is attached to the guide pipe for vertical movement. A table having a plurality of support legs with the lower ends of the support legs placed and fixed on the floor is fixed at the top of the support column, and a cart is moved up and down along the support column with respect to the table. The present invention constitutes a tower crane with a trolley, which is characterized in that an elevating mechanism for moving the crane is mounted on the trolley, and a swingable crane boom is disposed at the upper end of the support column.

[Effect]

In the above configuration, since the cart has wheels, it can be moved. At the position where the trolley is stopped, crane work can be performed by suspending steel frames etc. from the crane boom on the support, and the trolley can be moved with the steel frames etc. suspended from the boom.

When raising the trolley to a high place, for example, the second floor, stabilize the table by placing the support legs under the table against the steel frame at the height of the second floor, leaving the lower part of the support in a hanging state, and lowering the lifting mechanism on the trolley. By actuation, the carriage rises relative to the table in such a manner that the guide pipe portion slides along the column. When the trolley reaches the height of the second floor, the trolley is fixed to the steel frame existing at the height of the second floor, the lifting mechanism is activated, and the lower part of the column that protrudes below the trolley is raised to the position of the trolley. let As a result, the table is in a state where it can be fixed with its support legs to the steel frame located at the height of the third floor, so by repeating the same process, the trolley is moved upward to the upper floor. It is possible,
It can also descend downwards.

〔Example〕

One embodiment will be explained below based on the drawings. Fig. 1 is a side view partially showing a tower crane with a trolley, Fig. 2 is a sectional view taken along line A-A in Fig. 1, Fig. 3 is a plan view taken along arrow B in Fig. 1, and Fig. 4 is FIG. 2 is a partially sectional side view similar to FIG. 1, showing a state in which the tower crane with a trolley is pulled up from the first floor to the second floor. 1 in the figure schematically shows the entire tower crane with a trolley.

The trolley 2 of the tower crane 1 with a trolley has a rectangular shape on a plane, and there are wheels 2 for transportation at the four corners of the lower part.
A, 2a are arranged, and it is possible to run in any direction. A winch drum 3 for lifting the cart as lifting mechanisms 3, 4, 5, a winch drum 4 for lifting the support column 9, and a crane coaxially mounted on both ends of the cart 2 in the longitudinal direction are provided. A winch drum 5 for hoisting the hook 17 is provided, and each winch drum 3, 4, 5
has a brake device and a clutch device that operate independently, and is configured to be driven individually by a power device 6 such as an electric motor mounted on the truck 2.

Further, a through hole 2b is formed approximately at the center of the truck 2, and a guide pipe 8 is erected and fixed on the peripheral edge of the through hole 2b so as to communicate with the through hole 2b.

A strut 9 is inserted through the inner hole of the guide pipe 8, and the lower end of the strut 9 is configured to be able to penetrate downward from the through hole 2b. Hole 9a...8
a... Preventing the support 9 from being pulled out from the guide pipe 8 by passing the pin 10 through it when a hole is opened and either of the two pin holes 9a, 8a is in a communicating state, In addition, the structure is such that the height of the support column 9 above the truck 2 can be adjusted.

A table 13 is fixed to the top of the support column 9, and a plurality of (for example, four) support legs 26, 26... are hung from the bottom of the table 13, so that the length can be adjusted. It is a patchwork style.

A crane boom 11 is horizontally rotatably disposed at the upper end of the support column 9 via a rotating shaft 11D. The crane boom 11 is a fixed boom 11
Insert the sliding boom 11c into the fixed boom 11
A cylinder 11b is interposed between the sliding boom 11c and the sliding boom 11c, and the sliding boom 11c is configured to move forward and backward in the tip direction by the expansion and contraction operation of the cylinder 11b, and a pulley 15 is pivotally attached to the tip of the sliding boom 11c. A crane hook 17 is suspended with a rope 16. The rope 16 is wound around a pulley 18 that is pivoted to the fixed boom 11a, and further passed through a pulley 19 that is pivoted to the guide pipe 8, and then wound around the winch drum of the lifting mechanism 5. The boom 11 can be rotated by rotating the rotating shaft 11D in FIG. A small table 12 is fixed to the support 9 below the rotating device, and pulleys 20a, 20 are mounted on the lower surface of the small table 12.
b, 20c, and 20d are pivoted. The table 13 has rope passage holes 25, 25 formed vertically through the edge thereof. Also, on both longitudinal end edges of the truck 2, beams 21 are arranged perpendicular to the longitudinal direction.
21, pulleys 22a and 22b are provided at the upper ends of one longitudinal side of the beams 21 and 21, and an anchor 23 is provided on the opposite side. Therefore, the trolley lifting rope 24 is connected to the pulleys 22a and 22 from the lifting mechanism 3.
0a, 20b, 22b, 20c, and 20d in order to reach the anchor 23. Therefore, by winding up the rope 24 by the lifting mechanism 3, the column 9 can be moved downward relative to the guide pipe 8, that is, the carriage 2 can be raised relative to the table 13. Note that the rope 24 is inserted through rope through holes 25, 25 of the table 13.

Furthermore, as shown in FIG.
One end of the rope 30 for pulling up the support column 9 is fixed to the anchor 29, and the pulleys 27b, 28, 27 are sequentially connected to the anchor 29.
It is stretched so as to reach the elevating mechanism 4 via a.
By winding up the rope 30 by the lifting mechanism 4, the support column 9 can be moved upward relative to the guide pipe 8. Note that reference numerals 31 and 31 in FIG. 2 are outriggers.

This trolley-equipped tower crane 1 is constructed as described above, and its operation will be explained in accordance with the work procedure when the tower crane 1 is used for building construction work.

First, the tower crane 1 with a trolley is installed at an appropriate position on the ground, and the steel construction work on the second floor is carried out by combining the rotation of the fixed boom 11a, the advancement and retreat of the sliding boom 11c, and the lifting and lowering movement of the hook 17 by the lifting mechanism 5. Do this. In this case, in addition to using the outriggers 31, 31, the following can be done to stabilize the aircraft. That is, the supporting legs 26, 26 of a length suitable for the table 13 are attached and installed in a state extending above the ground, and the rope 30 is wound or let out by the lifting mechanism 4 with the fixing pin 10 removed, and the support leg is While moving the pin hole 9a of the support 9 up and down, insert the pin hole 9a of the guide pipe 8 into the pin hole 8 of the guide pipe 8.
a, set the height of the support 9 to the desired height, insert the pin 10 into both pin holes 8a and 9a, and then wind the rope 30 with the lifting mechanism 3 in a relaxed state. By tensioning the rope 24 during operation, tilting of the column 9 is prevented. This and the effect of the support legs 26, 26 can increase the stability of the aircraft body.

By running the trolley 2, the tower crane 1 with a trolley can move its installation position as required, such as when constructing a large building. In order to run the trolley 2, the lifting mechanism 3 pulls a tow rope stretched between it and a suitable fixed object outside the aircraft body.The tower crane with a trolley is small and lightweight. It goes without saying that the vehicle may be moved manually, and other drive means for traveling may be provided.

After completing the assembly of the steel frame on the second floor as described above, the tower crane with a trolley is moved to the second floor floor using the following procedure. First, as shown in FIG. 4, an opening 32 is provided in advance on the second floor surface F to allow the passage of the trolley 2, and a support leg 26 of an appropriate length is installed between the second floor surface and the table 13. , a simple cage is installed around the opening 32. Next, the tension of the rope 24 by the lifting mechanism 3 is released, and the lifting mechanism 4
The rope 30 is braked under tension, and the pin 10 is removed. Next, the lifting mechanism 3 winds up the rope 24 and lifts the cart 2 relative to the support 9 via the guide pipe. When the trolley 2 has been pulled up to a position slightly above the second floor floor F, the lifting mechanism 3 is braked, and a steel plate or the like is placed on the second floor floor F so as to cover the opening 32 under the moving wheels 2a. After erecting, the brake of the lifting mechanism 3 is released and the trolley 2 is placed on the iron plate. Then, the rope 30 is lifted by the lifting mechanism 4.
While braking the table 13 under tension and releasing the support of the table 13 by the support legs 26, the lifting mechanism 4 winds up the rope 30 and moves the support column 9 upward relative to the guide pipe 8. When a predetermined relative positional relationship is achieved, the lifting mechanism 4 is stopped. This predetermined positional relationship between the guide pipe 8 and the support column 9 may be determined as shown in FIG. 1, but is not limited thereto, and the support column 9 may be set at a higher or lower position. By doing so, the height of the support column 9 during work can be variably adjusted. When the pillar 9 is placed at a lower position, the lower end of the pillar 9 may penetrate below the second floor floor surface. In this way, since the height of the support column 9 can be adjusted freely, the optimum length of the support support can be selected depending on the work contents, such as when the height of the first floor and the height of the second floor are different.

With the above steps, the tower crane with trolley can be assembled into 2
After raising the aircraft to the floor surface, the aircraft can be stably installed by using the outriggers 31, the support legs 26, and the support function of the ropes 24, and the cargo handling work necessary for the steel frame construction work on the third floor can be performed. This and the fact that the installation position can be moved by running the trolley are similar to those explained above regarding the case where a tower crane with a trolley is installed on the first floor and construction work is performed on the steel frame on the second floor.

Once the construction of the steel frame for the third floor is completed, the steel frame for a building with a predetermined number of floors can be assembled by repeating the same work procedure. When the tower crane with a trolley is finished being used in the building, it is disassembled and removed, but since the tower crane with a trolley is small as a whole and each part has a simple structure, the disassembly work is extremely difficult. It's easy.

〔effect〕

The effects brought about by the tower crane with a trolley according to the illustrated embodiment described above are summarized as follows.

The trolley-equipped tower crane can be moved by the trolley to move its installation location, so even when constructing a building with a relatively large floor area, it is possible to maintain a boom length and turning radius that are sufficient to cover the entire floor area at the same time. Even if the crane has a small capacity, the work can be carried out satisfactorily.

Tower cranes with trolleys can be moved from the lower floor to the upper floor, so there is no need to handle cargo at a higher position than 3 floors above the ground, and therefore the crane capacity is small, such as short support lengths and boom lengths. It's over.

Place the winch drum, power unit, etc. on the trolley.
Since the cranes are mounted so as to be arranged evenly around the pillars to form a bogie device, the crane can be downsized by the above and the above, and the machine body can have a stable structure.

In addition, during cargo handling operations using a tower crane with a trolley, the outriggers, support legs, and trolley lifting rope 24 can be used to prevent the column from tilting and to stabilize the aircraft.

As mentioned above, tower cranes with trolleys have become smaller, and in addition to being stable and movable, especially when installed on the second floor or above,
Since the height of the support column can be variably adjusted according to the content of the work, the workability of the cargo handling work is improved, which in turn can shorten the construction period and further improve the safety of the work.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a side view of a tower crane with a trolley, FIG. 2 is a sectional view taken along line A-A in FIG. 1, FIG. 3 is a plan view, and FIG. FIG. 2 is a side view showing a state in which the attached tower crane is moved from the ground to the second floor. 1... Tower crane with trolley, 2... Trolley,
2b...through hole, 3, 4, 5...lifting mechanism, 8...
...Guide pipe, 9...Strut, 11...Boom,
13...table, 17...crane hook, 2
4... Rope for lifting the trolley, 26... Support legs,
30... Rope for pulling up the prop.

Claims (1)

[Claims] 1. A through-hole is formed in the bogie that passes vertically, a guide pipe is erected on the periphery of the through-hole so as to communicate with the through-hole, and a support is passed through the guide pipe so as to be vertically movable. A table having a plurality of support legs with the lower ends of the support legs placed and fixed on the floor is fixed on the upper part, and the cart is equipped with a lifting mechanism that moves the cart up and down along the pillars with respect to the table. A tower crane with a trolley, which is characterized by having a swingable crane boom installed at the top end of the support.