JP2003054874A - Crane and its installing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crane and its installing method with easy assembly and removal and no part of the crane sticking outside a site even on narrow land. SOLUTION: The crane is provided with main masts 1 positioned in one two corner side, sub masts 2 positioned in another two corner side, girders 3 respectively connecting the main masts 1 and the sub masts 2, a moving girder 4 provided so as to move along the girders 3, and a hoist 5 slidably provided on the moving girder 4. A climbing device 6 is attached to the main masts 1, and the addable girders 3 are horizontally extended from top parts of the climbing device 6. The addable sub masts 2 are suspended from the girders 3, and the moving girder 4 is provided between opposing girders 3. The climbing device 6 is raised while adding masts to the main masts 1 and sub masts 2, a main mast length, a sub mast length, and a girder length are extended to predetermined lengths, and the sub masts 2 are moved to other four corners of four corners.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting machine and a method for installing the lifting machine, and more particularly to a lifting machine and a method suitable for constructing a crane in a narrow space.

[0002]

2. Description of the Related Art As is well known, when constructing a medium-scale or larger structure such as a condominium or a building, a construction method is used in which necessary materials such as steel frames and precast members are lifted to a predetermined position by a crane.

When installing a crane, as shown in FIG. 12, it is common to use a jib crane or the like in which a mast 40 is erected on the road 47 side of the planned construction site 41, and a boom is supported on the mast 40 to install the hoist 42. is there. Here, the mast 40 is erected at the end of the site, but the reason why the crane is installed on the road side is to smoothly supply the above-mentioned materials.

By the way, in recent years, in construction of buildings, for example, for balconies, outer walls, etc., there is a tendency to frequently use precast concrete members, that is, precast members, which are manufactured in advance in factories. This is adopted to shorten the construction period and work on the site, but of course, since the precast member is a heavy concrete object,
A large crane with a maximum lifting capacity of about 5 tons is indispensable. Since such a large crane withstands a load of 5 tons at the hoisting point of the boom tip 43 (actually, there is a safety factor and thus more load), the boom rear end 44 (a length of about 1/4 of the boom tip) is used. ) Is equipped with a counter balancer 45 having a weight exceeding 5 tons.

As described above, it is inevitable that the boom rear end, which projects rearward, also becomes longer as the crane becomes larger.

[0006]

However, it may be difficult to install such a large crane in a narrow space. As shown in FIG. 13, the boom rear end 44 largely protrudes from the site L in the range indicated by the arrow A. In this case, the boom front end is located above the building 47, but there is a risk that the boom rear end 44 may be located on the road or may come into contact with an adjacent building at the time of turning.

Moreover, when removing a medium-sized or larger crane, it is necessary to disassemble the parts while disassembling each part and dismount the parts on the ground. It is necessary to secure a place to install the crane.

Due to these reasons, there is a situation in which it becomes difficult to adopt the precast construction method having various merits as described above, which becomes a bottleneck in construction work.

The present invention has been made in order to solve the above-mentioned conventional problems, and even in a narrow space, a part of the crane does not largely extend outside the site, and the construction lifting machine is easy to assemble and remove. , And its installation method.

[0010]

The present invention is a lifting machine and a method for installing the same, and is configured as follows in order to solve the above-mentioned technical problems.

That is, among the four corners around the building to be constructed, the main mast 1 located on one of the two corners, the sub mast 2 located on the other two corners, and the main mast 1 and the sub mast. The garter 3 that connects the two and the garter 3
The movable garter 4 is provided so as to bridge the space between the movable garter 3 and the movable garter 4, and the hoist 5 slidably provided on the movable garter 4.

The four corners around the building to be constructed are the four corners that are close to the building to the extent that they do not actually contact the completed building, and one of the two corners is adjacent to a road or a vacant lot. It is the two corners on the side where it looks. The other two corners are the two corners located in the back when seen from the road or vacant land. In addition,
If there are roads and vacant lots on both sides of the building, these may be set appropriately.

Here, the main mast 1 and the sub-mast 2 are provided upright, for example, two in each, four in total, and finally placed in each of the four corners.

When installing the construction lifting machine having such a construction, first, the main masts 1 which can be added to the two corners of one of the four corners of the building to be constructed are erected. The main mast 1 has a structure that can be easily connected by, for example, bolts and nuts.

Next, the climbing device 6 is attached to each of the main masts 1. The climbing device 6 is a device that lifts the main mast 1 by a driving device such as a hydraulic jack or a motor. It is desirable to provide an interlock function so that the main mast 1 can be safely lifted while being engaged. That is, all of the pins and the like for fixing the climbing device 6 to the main mast 1 are prevented from coming off at the same time, and work safety is ensured.

The main mast 1 passes through the climbing device 6, and the next main mast 1 is added to the upper end of the climbing device 6 to raise the climbing device 6. In this way, the climbing device 6 is sequentially raised.

Subsequently, the garter 3 which can be added from the top of the climbing device 6 is horizontally extended. The garter 3 is added to the top of the climbing device 6 by repeating temporary fixing and sliding, and finally has a total length equal to the distance between the two corners of one and the other.

Then, sub-masts 2 that can be added from the respective garters 3 are hung down. The sub-mast 2 is suspended from the garter 3, and is extended by successively adding the next sub-mast 2 to the lower end thereof.

Subsequently, a movable garter 4 is provided between the opposing garters 3, and a hoist 5 is slidably provided on the movable garter 4. The moving garter 4 is provided with, for example, an electric roller and is configured to run on the garter 3.

Next, the climbing device 6 is raised while adding the masts to the main mast 1 and the sub mast 2, respectively.
Extend the mast to the desired height, that is, the height required for construction.

In this way, when the main mast length, the sub mast length and the garter length are extended to the predetermined lengths, the sub mast 2 is moved to the other two corners of the four corners. As a result, a rectangular structure supported by, for example, four legs is completed, and the hoist 5 freely moves within the range of the structure to lift the steel material and the precast member.

In this way, no matter how the hoist 5 is moved, the equipment does not project out of the range of the structure,
Construction is possible even on extremely small lands. Also, there is no need to prepare a separate crane for assembling or disassembling this structure.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION The unloading machine and its installation method of the present invention will be described in more detail below with reference to the embodiments shown in FIGS. 1 to 11.

The structure of the present invention will be described together with the assembling procedure. First, the steel tower base 1a is fixed to the ground. The fixed position is the building 10 as shown in FIG.
Of the four corners around, it is two places on one of the two corners.

Then, as shown in FIG. 1, the tower base 1
Fix the main masts 1 on a. This main mast 1
As shown in FIG. 11, it has a truss-like structure, and it is possible to connect an arbitrary number of main masts 1 and connect the insides thereof with bolts and nuts 1b and 1c so as to have a predetermined length. A climbing device 6 is attached to each of the main masts 1 thus formed.

The climbing device 6 is a device for moving up and down the main mast 1 by hydraulic pressure, and has a structure in which an upper chassis 6a and a lower chassis 6b are connected by a cylinder and a piston 6c as shown in FIG. The cylinder and the piston 6c are connected to a hydraulic device (not shown), and expand and contract when a high pressure is applied from the hydraulic device, so that the upper chassis 6a and the lower chassis 6b come close to or separate from each other.

There is a space inside the upper chassis 6a and the lower chassis 6b, and the main mast 1 is slidably inserted into the cavity.

An upper lock pin 6d is provided on the upper chassis 6a. The upper lock pin 6d is always urged inward (on the side of the main mast 1) by a spring and engages with the truss of the main mast 1. Then, the upper lock pin 6d can be slid outward (on the side where the lock is released, in the arrow F direction) by a solenoid plunger (not shown).

Therefore, when the solenoid plunger is not operating (energizing), the upper chassis 6a is locked by the main mast 1 and cannot move, and when the solenoid plunger is operating (energizing), the upper chassis 6a and the main mast 1 are not connected to each other. The lock is released to allow the upper chassis 6a to move.

Similarly, the lower chassis 6b is provided with a lower lock pin 6e. The lower lock pin 6e is normally urged inward (on the side of the main mast 1) and engages with the truss of the main mast 1.
The lower lock pin 6e can be slid outward by a solenoid plunger (not shown).

Therefore, when the solenoid plunger is not operating (energizing), the lower chassis 6b is locked by the main mast 1 and cannot move, and when the solenoid plunger is operating (energizing), the lower chassis 6b and the main mast 1 are separated from each other. The lock is released and the lower chassis 6b becomes movable.

The lower lock pin 6e and the upper lock pin 6d are interlocked with each other. That is, the lower lock pin 6e and the upper lock pin 6d are not released from the main mast 1 at the same time, and one of them is always locked. Further, even if the electric system fails for some reason and the solenoid plunger becomes uncontrollable, both lock pins are engaged with the main mast 1 by the spring, so that there is no danger of dropping or the like.

In order to raise the climbing device 6 in such a structure, first, the cylinder and the piston 6c are extended (pressurized) while the lower lock pin 6e is locked. Then, since the upper lock pin 6d is released, the upper chassis 6a rises.

When the cylinder and piston 6c are fully extended, the upper lock pin 6d is locked and the lower lock pin 6e is released. Then, the cylinder and the piston 6c are contracted. As a result, the lower chassis 6b
Only rises.

As described above, the climbing device 6 operates so as to rise up the main mast 1 while expanding and contracting like a scale insect. When the lock pin is lowered, the operational relationship between the lock pin, the cylinder and the piston 6c may be reversed.

On the upper part of the climbing device 6, there is provided a bed 6f for horizontally holding the garter 3 which can be added (FIG. 3). As shown in FIG. 8, the mounting position of the garter 3 and the mounting position of the main mast 1 are displaced from each other so that they are not in contact with each other.

The garter 3 is added to the top of the climbing device 6 in the horizontal direction by repeating temporary fixing and sliding with bolts.

Then, the auxiliary masts 2 that can be added from the respective garters 3 are hung down. This sub-mast 2 is suspended from the garter 3 and has the lower end of the next sub-mast 2
It is possible to extend by sequentially adding.

Subsequently, a movable garter 4 is provided between the garters 3 and 3 facing each other, and a hoist 5 is slidably provided on the movable garter 4. The movable garter 4 is provided with an electric roller 4 a and is configured to run on the garter 3. This electric roller 4a is controlled by a crane operator.

Next, the climbing device 6 is raised while adding the masts to the main mast 1 and the sub mast 2, respectively.
Extend the mast to the desired height, that is, the height required for construction.

Here, as shown in FIG. 6, the main mast 1 is sequentially added from the upper part, and the sub mast 2 is sequentially added to the lower end.

In this way, after the main mast length, the sub mast length and the garter length are extended to a predetermined length (FIG. 7),
As shown in FIG. 9, the sub-mast 2 is moved to the other two corners of the four corners to fix the sub-mast 2 to the ground. At this time, the tips of the garters 3, 3 are connected to each other by the connecting beam 11.

As a result, a rectangular structure supported by four legs as shown in FIGS. 8 to 10 is completed, and the hoist 5 freely moves in the G and H directions shown by the arrows within the range of the structure. It will be possible. Further, since the hoist 5 does not project out of the range of the structure no matter how it is moved, the hoisting work can be performed without affecting neighboring roads or adjacent buildings. Therefore, construction using a crane is possible even on extremely small lands.

Upon removal, the procedure can be carried out in the reverse order of the procedure described above. For this reason, it is not necessary to disassemble the parts of a large or medium-sized crane and unload them with a small crane as in the related art, and the removal work can be performed extremely efficiently.

[0045]

As described above, according to the present invention, it is possible to install a crane even in a narrow area without affecting the surroundings. Therefore, a large crane can be easily installed even in an urban area where buildings are densely located, and it becomes easy to lift a heavy object in the precast method or the like.

Further, assembling and removal are easy, and no special equipment is required, so that the construction period can be shortened.

[Brief description of drawings]

FIG. 1 is a side view showing a first stage of an assembling process of a lifting machine of the present invention.

FIG. 2 is a side view showing a second stage of the assembling process of the lifting machine of the present invention.

FIG. 3 is a side view showing a third stage of the assembling process of the lifting machine of the present invention.

FIG. 4 is a side view showing a fourth stage of the assembling process of the lifting machine of the present invention.

FIG. 5 is a side view showing a fifth stage of the assembling process of the lifting machine of the present invention.

FIG. 6 is a side view showing a sixth stage of the assembling process of the lifting machine of the present invention.

FIG. 7 is a side view showing a seventh stage of the assembling process of the lifting machine of the present invention.

FIG. 8 is a plan view showing a completed state of the lifting machine of the present invention.

FIG. 9 is a side view showing a completed state of the lifting machine of the present invention.

FIG. 10 is a rear view showing a completed state of the lifting machine of the present invention.

FIG. 11 is a side view showing a climbing device of a lifting machine of the present invention.

FIG. 12 is a side view showing a conventional lifting machine.

FIG. 13 is a plan view showing an operating range of a conventional lifting machine.

[Explanation of symbols]

1 main mast 2 deputy mast 3 Garter 4 Moving Garter 5 hoists 6 climbing equipment 10 buildings

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shinichi Hamaguchi             2-10-26 Fujimi, Chiyoda-ku, Tokyo             Within Ta Construction Industry Co., Ltd. F-term (reference) 3F203 AA10 CA02 CC01 DA01 FA01                 3F205 AB01 AB07 BA06

Claims (2)

[Claims] 1. A main mast located on one of two corners of the four corners of a building to be constructed, a sub mast located on the other two corners, and the main mast and the sub mast, respectively. A garter to be connected, a movable garter provided so as to bridge between the garters and movable along the garter, and a hoist slidably provided on the movable garter. A characteristic lifting machine. 2. A step of installing main masts that can be added to two corners of one of the four corners of a building to be built, and a step of attaching climbing devices to these main masts, from the top of the climbing device. The process of horizontally extending the garters that can be added, the process of hanging the auxiliary masts that can be added from each garter, the process of providing a moving garter between the opposing garters, and the process of installing the hoist slidably on the moving garters. The process of raising the climbing device while adding the mast to the mast and the sub mast respectively, and when the main mast length, the sub mast length and the garter length are extended to a predetermined length, the sub mast is moved to the other four corners of the four corners. A method of installing a lifting machine, comprising: