JP2855014B2 - Disassembled jib crane - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is suitable for dismantling a large crane used for construction of a building or the like, mainly for installing on a rooftop floor of a high-rise building at a construction site, and reassembling a part thereof. The present invention relates to a disassembled jib crane configured to be able to disassemble itself.

[0002]

2. Description of the Related Art When constructing a high-rise building, it is necessary to lift a high-lift, heavy-weight skeleton member, and a large tower crane is installed in the skeleton of the building to build the skeleton. Work is taking place. For this reason, when the frame of the building approaches completion, the large tower crane is no longer used and needs to be dismantled and removed.

Therefore, conventionally, in order to dismantle and remove this large tower crane, first, a medium-sized jib crane is installed on the rooftop, and the large tower crane is dismantled by this medium-sized jib crane, and the members disassembled on the ground floor are disassembled. Are suspended and removed. When the dismantling work of this large tower crane is completed, a jib crane smaller than the medium-sized jib crane is installed on the roof floor, and the medium-sized jib crane is disassembled with a small jib crane, dropped on the ground floor and removed. ing.

However, since the small jib crane is required to have a high lift, no matter how small the jib crane is, the components are large as a whole. Therefore, in order to further remove the small jib crane, a smaller jib crane is required. It is disassembled and removed again with a crane. Sometimes, if the small crane cannot be removed at the end even if it is disassembled, the final disassembled parts must be large enough to be carried by the worker, and for example, installed in this state. Install a small disassembled jib crane that can be disassembled to the size that can be mounted in the elevator cage of this elevator, disassemble and remove the previous small jib crane with this disassembled small jib crane, and finally disassemble the last disassembled small jib crane Transported by elevator.

[0005]

As described above, conventionally, in order to remove a large tower crane used in construction work of a high-rise building, cranes are sequentially installed for dismantling at least four to five times. It is necessary to work, and the disassembly and removal work requires a lot of equipment and an increase in the work time required for its installation. The need for many such steps is
Therefore, a lot of construction costs are required, and especially in the case of a super-high-rise building, excessive costs are required for removing a large crane due to the relationship with the lift. Therefore, there is a demand for streamlining the work.

In the present invention, for the purpose of solving such a conventional problem, the present invention is used for dismantling and removing a large crane so that the removal work after the completion of the work accompanying the installation of the large crane can be more rationalized. An object of the present invention is to provide a disassembled jib crane having a configuration in which a final removal process from removal of a medium-sized crane can be easily and rationally performed.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a disassembled jib crane having a structure in which all parts can be disassembled so that they can be transported in a small manner. The mast of the main boom raising and lowering support is erected rotatably at the time of manual operation, and a pair of stays connecting the bracket attached to the upper part of the mast and the rear part on the swivel are
After the main boom is not used, the fixed end of the turntable side is removed and both ends are connected, and a trolley is provided and the top of the mast is connected to the mast with a stay cable to form a horizontal boom. A swing mechanism and a manual winch for trolley traverse when the horizontal boom is formed, the hoisting winch of the main boom is lowered onto the floor, and a rope operated by the hoisting winch is pulled from the lower part of the mast to a pulley at the top of the mast. An auxiliary crane which can be connected to the hanging hook from the trolley pulley via the pulley attached to the end of the horizontal boom to be converted for self disassembly is provided.

Further, the present invention relates to a disassembled jib crane having a structure in which all parts can be disassembled so that it can be transported in a small manner. It is erected so that the bracket attached to the upper part of this mast and the rear upper part of the swivel are connected by a pair of stays, and it is suspended via pulleys attached to both sides of the tip of the main boom to operate the suspension pulley. The S-twist and the Z-twist are fed and wound in unison from a take-up reel by endless winches mounted on a swivel through two sets of endless winches via guide pulleys provided on both upper sides of the mast. When the main boom is dismantled, a pair of stays connecting the upper bracket of the mast and the swivel are replaced with the horizontal boom of the auxiliary crane, and the hoisting winch of the main boom is lifted. It is characterized in being configured to be converted into winches use.

[0009]

According to the disassembled jib crane of the present invention, the jib crane can be installed on the rooftop of the building as in the prior art and used for removing other cranes. At this time, the hanging cable is driven by an endless winch. There is no problem for use at high lift. When the crane is dismantled and dismantled, etc., when dismantling itself, lower the main boom on the floor, remove the hanging cable, and then move the hoisting winch to the floor using an auxiliary tool and install it. Then, the stay of the mast is disassembled from the swivel side and assembled as a horizontal boom, and then the hoisting winch cable is passed from below the support base through the top of the mast via a trolley incorporated into the assembled horizontal boom. An auxiliary crane is formed by connecting to the hanging hook. Therefore, after that, the main boom and the swivel and the respective components such as the endless winch and the take-up reel mounted on the swivel can be disassembled into small transportable states by the auxiliary crane.

When the crane body is disassembled, the mast and the horizontal boom can be lowered by releasing the fixation of the turning base.
After that, all dismantling work can be done on the floor, and the whole can be disassembled and removed.

In the disassembly type crane of the present invention, when lifting and lowering work using the main boom, the suspension ropes are operated by synchronizing the S stranded cable and the Z stranded cable with separate endless winches, respectively. Since the suspension pulley is operated, even at a high head, the operation can be performed smoothly without twisting of the suspension rope.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a disassembled crane according to the present invention will be described with reference to the drawings. In this embodiment, a case where the support base is a traveling vehicle will be described.

FIG. 1 is a front view of one embodiment of the disassembled crane of the present invention. FIG. 2 is a plan view. FIG. 3 is an enlarged view of a main part of the mast. FIG. 4 is a diagram showing a disassembled state of the crane main body.

First, as shown in FIG. 1 and FIG. 2, the entire structure of the crane includes a swivel 4 on a movable carriage 1 via a swivel mechanism 3 provided on the swivel 2.
A mast 5 is provided upright at the center of rotation, and the end of the main boom 6 is supported at the front end of the swivel 4. A take-up reel 7 of a hanging rope, an endless winch 8, The hoisting winches 9 of the main boom 6 are respectively mounted.

The traveling vehicle 1 has a disassembly / assembly structure in which each part is formed in such a size that at least the operator can disassemble it to a weight which can be manually moved by using a small transport vehicle. These parts are connected, for example, by a joint structure by bolting, and four traveling wheels 1 'are rotatably attached to the four corners by a support frame 1a. In this example, the running wheels
Numeral 1 'is adapted to be movable on a traveling rail R of a gondola hanging crane for maintenance of a side wall laid on a building rooftop floor (not limited to this). Further, a clamp mechanism 1b is attached to each of the support frames 1a of the traveling wheels 1 ', so that the traveling carriage 1 is fixed to the traveling rail R at the working position of the crane.

The swivel 2 attached to the center of the upper surface of the traveling vehicle 1 has a structure in which a space is formed in the center and can be divided at least to the left and right. A swivel 3a is provided on the upper surface, and through the swivel 3a A swivel 4 is rotatably mounted. Each part of the turning wheel 3a, which is assembled to the turning disk 4 or higher by a known turning mechanism 3 in which a gear driven by a turning driving device 3M mounted on the turning disk 4 side meshes with a fixed-side gear of the turning wheel 3a. It is supported so that it can turn.

The revolving machine 4 has a structure in which it can be disassembled into a plurality of pieces vertically and horizontally, and two sets of take-up reels 7 for hanging cables are provided on the rear upper surface, two sets of endless winches 8, and an up-and-down Winch 9 is mounted. The base end of the main boom 6 is pin-connected to the front end. The main boom 6 is connected to a plurality of blocks by joints 6a and 6b and has a required length, and has a weight within a range that can be transported small.

A mast 5 is erected at the center of rotation so that the mast 5 can be turned. The base of the mast 5 has a base end connected to a pin 5c by a bracket 5b on a traveling carriage 1, as shown in FIG. 5a is inserted and supported. The mast 5 is normally fixed to the swivel 4 via the cylinder 5a, and is configured to be able to turn when used as an auxiliary crane described later. Further, it is formed so that it can be disassembled into a size that can be easily carried at the time of disassembly. The mast 5
The means for supporting the base is not limited to this.

The mast 5 is formed of a hollow body, and a guide pulley 12 for an undulating cable 11 of the main boom 6 is provided on the top, and a hanging cable 15 is provided on both sides of the mast 5 on an upper bracket 13 attached to the upper part.
And three guide pulleys 14 are provided in parallel with each other, and pulleys 16 of the hoisting rope 11 are attached to the front of the upper bracket 13, respectively. A pair of stays 20 are provided between the rear of the upper bracket 13 of the mast 5 and the rear of the swivel 4. Further, a manual turning mechanism 25 is provided below the mast 5.
And a small manual winch 26.

The stay 20 can be divided into a plurality of parts, and its side is formed on a guide rail of a trolley. Normally, the bracket 21 provided at the tip is fastened to the mounting piece 4a on the swivel 4 so that it can function as a stay.
21 and a pair of stays by stay end connecting piece 21a.
When the 20 ends are connected, the pulley 22 (see FIG. 4) is configured to be attached.

Next, the hanging cable 15 is wound around the take-up reel 7 for the entire length of the S-twist and the Z-twist, respectively. From the take-up reel 7, for example, the outermost guide pulley above the mast 5 is provided. Endless winch 8 around 14
Through the other pulley 14 'at the top of the mast 5 again, through the pulley 17 connected along with the overload detection switch 17' at the bottom along the mast 5, and further, the guide pulley inside the top of the mast 5 After passing through 14 ", each is connected to a hanging rope wound around a pulley block 19 at the tip side of the main boom 6 and wound around a hanging pulley block 19. Then, each of the S-twisted and Z-twisted hanging ropes 15 is operated. The two endless winches 8, 8 are connected to each other so as to be driven synchronously, and both slings 15 are operated at the same speed.

The hoisting rope 11 of the main boom 6 is a hoisting winch 9.
Through a guide pulley 12 at the top of the mast 5 and a plurality of turns between a pulley 18 'at the tip of the main boom 6 and a pulley 16 attached to the top of the mast 5 to connect the tip to the base of the main boom 6. As is well known, the main boom 6 can be raised and lowered.

The disassembled jib crane of the present invention thus constructed is mounted on a traveling rail R of a gondola hanging crane (not shown) used after the building is completed, for example, near the crane to be disassembled installed on the building frame. It is fixed so that it can be moved to the target position by the clamp mechanism 1b, and is operated and used like a normal crane. In this case, if the traveling rail R for the gondola hanging crane is used, it can be moved to a desired position around the building and the dismantled member can be easily lowered from the roof to the ground. In addition, since the hanging cable 15 is of the S twist type and the Z twist type, the lifting operation can be performed without any trouble even if the head is high.

In order to disassemble the disassembled jib crane after being used for dismantling the existing crane or for other lifting and lowering work, the main boom 6 is lowered to the floor, and the slings 15 are wound up. Connect one or both of the suspension lines 15 to the third guide pulley above the mast 5
The winding direction at 14 is reversed, and the hoisting winch 9 of the main boom 6 is suspended as shown in FIG.
), And the fixing of the hoisting winch 9 to the swivel 4 is released, and a guide member as an auxiliary tool separately prepared is provided.
30 (when not in use, for example, it is convenient to store it by using the side of the swivel 4) and diagonally hang it over the swivel 4 and the floor (or rail R) and fix it. Is gradually pulled out, and the hoisting winch 9 is lowered from the turntable 4 onto the floor (or rail R) and installed. Thereafter, the main boom 6 can be disassembled with the hanging cable 15 in the housed state.

Next, the hoisting winch 9 is activated and the hoisting rope 11 is wound up. Thereafter, the guide pulley 12 at the top of the mast 5 is passed through the mast 5 having a hollow structure from below the traveling vehicle 1. Apart from this work, the connection between the tip bracket 21 of the stay 20 and the mounting piece 4a on the swivel 4 is released,
Stay end connecting piece separately prepared at the tip of this stay 20
21a is attached to integrate a pair of stays 20, a pulley 22 is attached to the stay end connecting piece 21a, and a roller of a trolley 23 is engaged with a guide rail portion of the stay 20, so that the stay 20 is Prepare to have a horizontal boom as an auxiliary crane.

The pulley 22 at the tip of the stay 20 (hereinafter referred to as the horizontal boom 20) prepared to be the horizontal boom is connected to the pulley 23 'of the trolley 23 via the pulley 12 at the top of the mast 5 first. Undulating cable 11 (hereinafter simply referred to as cable 11)
, And a separately prepared hanging hook 24 is connected to the tip. At this point, a cable (this will be a trolley 23 traveling rope as an auxiliary crane; hereinafter referred to as a transverse rope 27) is pulled out from a small manual winch 26 attached to the lower part of the mast 5 and attached to the upper part of the mast 5. Pulley being
Connect to trolley 23 via 27 '.

After such preparations have been made, the hoisting winch 9 (hereinafter simply referred to as winch 9) is activated to wind up the cable 11, and the line 11 is horizontally moved from the position indicated by the chain line a in FIG. Displace the boom 20 horizontally and use this horizontal boom
By connecting the rear end of the stay cable 28, one end of which is attached to the distal end before the lifting of the 20, to the mounting portion 29 provided in advance on the top side of the mast 5, by holding the horizontal boom 20 horizontally The auxiliary crane is assembled. Thereafter, the winch 9 is driven and the manual winch 26 is operated to wind and unwind the rope 11, and the trolley 23 is driven to operate as an auxiliary crane to operate the endless winch 8 and the take-up reel on the swivel 4. 7 can be removed and the turntable 4 can be disassembled and removed.

As the disassembly of the equipment mounted on the swivel 4 and the swivel 4 itself proceeds in such a manner, when the fixing of the casing 5a fixed at the base of the mast 5 and the mast 5 main body is released, Since the attached manual turning mechanism 25 can be used, the manual turning mechanism 25 is driven to turn the horizontal boom 20 together with the mast 5, and the disassembling operation is performed within the turning radius of the horizontal boom 20 (in a chain line e). (Showing a state where the horizontal boom 20 is turned). Therefore,
When the auxiliary crane can be used to drop directly to the ground floor, the disassembled pieces and equipment can be lowered from the roof to the ground. When the disassembly proceeds in this manner, a structure including the mast 5 and the horizontal boom 20 is formed on the traveling vehicle 1 as shown in FIG.

After the turning mechanism 3 and above are disassembled, the swivel 2 is disassembled, and the swivel wheel 3a is lowered onto the upper surface of the traveling vehicle 1. In this state, the mast 5 can fall down, so that the mast 5 is lowered to the state shown by the chain line b in FIG. Thereafter, by disassembling the mast 5, the horizontal boom 20, and the traveling vehicle 1 into a small transportable state, the vehicle can be transported to the ground floor by using the permanent elevator installed in the building.

In the above description, the support base as the disassembled jib crane is a traveling vehicle, but this support base can be used in place of the stationary structure. In this case, the whole can be set low.

[0031]

According to the disassembled jib crane of the present invention,
With a single crane, the crane used to construct the building frame from the rooftop of a high-rise building can be dismantled and dismantled and suspended from the rooftop directly to the ground. After dismantling of the crane, etc., all the cranes can be disassembled by reassembling part of this disassembled jib crane, so there is no need for many cranes. Dismantling and dismantling of industrial cranes can be facilitated and streamlined.

[Brief description of the drawings]

FIG. 1 is a front view of a specific example of an exploded jib crane of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is an enlarged view of a main part of a mast.

FIG. 4 is a diagram showing a disassembled state of the crane main body.

FIG. 5 is an external view of the auxiliary crane in a state where the swivel is removed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Traveling trolley 1 'Traveling wheel 2 Revolving base 3 Revolving mechanism 4 Revolving machine 5 Mast 6 Main boom 7 Reeling reel take-up reel 8 Endless winch 9 Hoisting winch (winch with auxiliary crane) 12) Pulley at the top of the mast 13 Upper bracket 14 Guide pulley 15 Hanging cable 16, 17, 18 Pulley 19 Hanging pulley block 20 Stay (horizontal boom) 21a Stay end connecting piece 22 Pulley at the end of horizontal boom 23 Trolley 24 Hanging hook 25 Manual turning mechanism 26 Manual winch 27 Traversing cable 28 Stay cable 29 Stay cable attaching part 30 Guide member

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B66C 19/00-23/94

Claims (4)

(57) [Claims] 1. A disassembled jib crane having a structure in which all parts can be disassembled so that they can be transported in a small manner. A pair of stays for connecting the bracket provided with the upper part of the mast and the rear upper part of the swivel are connected to both ends by disengaging the fixed end of the swivel after the main boom is not used, and are provided with a trolley. When connected with a stay cable, the mast becomes a horizontal boom.On the base side surface of the mast, a manual turning mechanism for the mast and a manual winch for traversing the trolley when the horizontal boom is formed are provided. The rope operated by the hoisting winch is suspended from the trolley pulley from the lower part of the mast via the pulley at the top of the mast via the pulley attached to the end of the horizontal boom. Degradation crane, characterized in that it comprises an auxiliary crane that can be converted into a degradation of self-connecting to the click. 2. A disassembled jib crane having a structure in which all parts can be disassembled so as to be able to be transported in a small manner. The bracket attached to the upper part of the mast and the rear part of the revolving lathe are connected by a pair of stays, and the sling hanging from the pulleys attached to both sides of the end of the main boom to operate the pulleys has an S twist. The Z-twist is fed out and wound in a synchronized manner from a take-up reel by two sets of endless winches mounted on a swivel via guide pulleys provided on both sides of the upper part of the mast, and the main boom is dismantled. When it is done, a pair of stays connecting the upper bracket of the mast and the swivel are rearranged to the horizontal boom of the auxiliary crane, and the hoisting winch of the main boom becomes a lifting winch. Decomposing type jib crane, characterized in that it is configured to be conversion. 3. The disassembled jib crane according to claim 1, wherein the support base is a traveling vehicle, and the traveling vehicle is provided with a clamp mechanism which is movable on a traveling rail and is fixed at a required position. . 4. After the main boom is removed, the entire swivel and the swivel base can all be disassembled and removed, and the mast of the main boom up / down support is supported by connecting a base thereof to a traveling vehicle so as to be able to be turned upside down. 4. The disassembled jib crane according to any one of claims 1 to 3.