JP6969281B2 - Crane and crane disassembly method - Google Patents

Description

The present invention relates to a crane and a crane disassembling method.

Since a relatively large crane is heavy, it is disassembled into a plurality of parts and transported by being divided into a plurality of trailers and the like. Therefore, it is necessary to disassemble and assemble the crane at the work site.

As a technique for efficiently performing such disassembly and assembly, Japanese Patent Application Laid-Open No. 2007-302352 discloses an undulating winch and a mast in which an undulating winch used for undulating the boom is arranged on a mast or a gantry. Alternatively, it has been proposed that the gantry can be removed integrally.

JP-A-2007-302352

In the crane described in the above publication, at the time of disassembly, the frame-side spreader is paired with the mast-side spreader provided at the tip of the mast, and the rope extending from the undulating winch is hung between the mast-side spreader and the frame-side spreader. The rope is wound up with an undulating winch to bring the frame side spreader closer to the mast side spreader, making it difficult for the frame side spreader to swing.

However, in the crane described in the above publication, even if the frame-side spreader is brought close to the mast-side spreader, the frame-side spreader cannot be fixed, so care must be taken in handling. Further, in the crane described in the above publication, when the removed mast is loaded on a trailer or the like and the frame side spreader comes into contact with the floor surface or the like and is lifted, it is hung between the mast side spreader and the frame side spreader. The rope may loosen and come off the sheave, requiring the rope to be re-hooked during assembly.

In view of the above inconvenience, it is an object of the present invention to provide a crane and a crane disassembling method that can be easily disassembled and assembled.

The crane according to one aspect of the present invention, which has been made to solve the above problems, is undulatingly attached to and suspended from a lower traveling body, an upper swivel body mounted on the lower traveling body, and the upper swivel body. A boom to which a rope is hung and an undulating mechanism for raising and lowering the boom are provided, and the undulating mechanism is provided on a gantry or mast detachably attached to the upper swing body and a first gantry or mast provided at the tip of the gantry or mast. It has a spreader, a second spreader paired with the first spreader, and an undulating winch that is disposed on the gantry or mast and winds up an undulating rope that is hung on the first spreader and the second spreader. The gantry or mast has a spreader holding portion to which the second spreader is engaged by winding the undulating rope.

Since the undulating winch is arranged on the gantry or mast of the crane, the gantry or mast, the undulating winch, the first spreader and the second spreader are integrally removed and disassembled at the time of disassembly. can do. Therefore, the crane is easy to disassemble. Further, since the crane is provided with the spreader holding portion in which the gantry or mast is engaged with the second spreader by winding the undulating rope, the second spreader is disassembled into the gantry or mast. It is possible to prevent the undulating rope from coming off by applying tension to the undulating rope hung between the first spreader and the second spreader. Therefore, the crane is easy to assemble because the work of re-hanging the undulating rope does not occur at the time of assembly.

The crane may have a bracket for attaching the undulating winch to the gantry or mast, and the bracket may have a guide for guiding the second spreader. According to this configuration, the work of engaging the second spreader with the spreader holding portion is facilitated by winding the undulating rope, so that the crane can be disassembled more easily.

The crane may have a hoisting winch that is disposed on the gantry or mast and winds up the suspended rope. According to this configuration, the hoisting winch can also be removed from the upper swing body integrally with the gantry or the mast, so that the crane can be further easily disassembled.

The boom may have a miscellaneous winch that winds up the miscellaneous rope and a folded sheave that folds the miscellaneous rope back to the gantry or mast side. According to this configuration, during the work of engaging the second spreader with the spreader holding portion, tension in the undulating direction of the boom is applied to the undulating rope between the first spreader and the second spreader. It is possible to ensure that the second spreader moves toward the spreader holding portion and prevent the undulating rope from coming off.

Further, the method of disassembling the crane according to another aspect of the present invention includes a lower traveling body, an upper swivel body mounted on the lower traveling body, a boom undulatingly attached to the upper swivel body, and the boom. The undulating mechanism is provided with an undulating mechanism that is detachably attached to the upper swing body, a first spreader provided at the tip of the gantry, and a second spreader paired with the first spreader. The gantry has an undulating winch that is attached to the gantry and winds up the undulating rope that is hung on the first spreader and the second spreader. The gantry is engaged with the second spreader by winding the undulating rope. It is a method of disassembling a crane having a matching spreader holding portion. The second spreader is lifted by an auxiliary crane and pulled toward the boom side by a rope, and the undulating rope is wound up by the undulating winch to wind the spreader holding portion. Is engaged with the second spreader.

In the crane disassembling method, the second spreader is lifted by an auxiliary crane and pulled toward the boom side by a rope, so that tension is applied to the rope hung between the first spreader and the second spreader. Since the second spreader is engaged with the spreader holding portion by winding the undulating rope, the second spreader is different from the spreader holding portion during the work of engaging the second spreader with the spreader holding portion. It is possible to prevent the rope from moving in a direction or coming off from the first spreader and the second spreader. Therefore, in the crane disassembly method, the crane can be easily disassembled, and the disassembled parts can be easily assembled.

In the crane disassembling method, the gantry or mast may have a bracket for holding the undulating winch, and the bracket may have a guide for guiding the second spreader. According to this configuration, the work of engaging the second spreader with the spreader holding portion is facilitated by winding the undulating rope, so that the crane can be disassembled more easily.

In the crane disassembling method, the boom may have a miscellaneous winch that winds up the miscellaneous rope and a folded sheave that folds the miscellaneous rope back to the gantry or mast side. According to this configuration, during the work of engaging the second spreader with the spreader holding portion, tension in the undulating direction of the boom is applied to the undulating rope between the first spreader and the second spreader. It is possible to ensure that the second spreader moves toward the spreader holding portion and prevent the undulating rope from coming off.

As described above, the crane and the crane disassembling method of the present invention are easy to disassemble and assemble.

It is a schematic side view which shows the crane of one Embodiment of this invention. It is a schematic side view which shows the gantry removed from the crane of FIG. It is a schematic side view which shows the disassembling method of the crane of FIG. It is a schematic side view which shows the crane of the embodiment different from FIG. 1 of this invention. It is a schematic side view which shows the disassembling method of the crane of FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.

[First Embodiment]
FIG. 1 shows a crane according to the first embodiment of the present invention. The crane is undulating on the lower traveling body 1, the upper rotating body 2 mounted on the lower traveling body 1 so as to be able to swivel in the horizontal direction, and the front part of the upper swivel body 2 (downward to the front side and standing up to the rear side). It is provided with a boom 3 that can be mounted so as to be able to swing) and an undulating mechanism 4 that undulates the boom 3. In the figure, for example, the configuration of an engine, a hydraulic pump, a counterweight, etc. is omitted.

[Lower running body]
The lower traveling body 1 has a pair of crawlers (tracks) 5 as traveling devices.

[Upper swivel body]
The upper swivel body 2 is provided with a cabin 6 for the operator so as to be adjacent to the mounting portion of the boom 3. The undulation mechanism 4 is arranged behind the boom 3.

〔boom〕
The boom 3 includes a base end portion 7 that is swingably attached to the upper swing body 2 back and forth, and a tip end portion 8 that has a sheave that guides a suspension rope Rh that lifts a suspended load. The winding winch 9 for winding the suspension rope Rh is arranged on the upper swing body 2.

The boom 3 has a miscellaneous winch 10 for winding the miscellaneous rope Ro and a folded sheave 11 for folding the miscellaneous rope Ro toward the upper swivel body 2 at the base end portion 7. The miscellaneous winch 10 is used, for example, for connection work between the base end portion 7 and the tip end portion 8, and can also be used in the crane disassembling method according to the embodiment of the present invention by using it together with the folded sheave 11.

[Undulation mechanism]
The undulating mechanism 4 is arranged on the gantry 12 detachably attached to the upper swing body 2, the first spreader 13 provided at the tip of the gantry 12, the second spreader 14 paired with the first spreader 13, and the gantry 12. It has an undulating winch 15 that winds up an undulating rope Rd that is provided and spans the first spreader 13 and the second spreader 14.

<Gantry>
The gantry 12 is arranged so as to extend rearward and upward from the upper swing body 2 when the crane is used. This gantry 12 is also called a high A frame and is used as a reference point for undulations of the boom 3. Specifically, the tip of the boom 3 is connected to the tip of the gantry 12 (the end opposite to the upper swivel body 2) via the guy line 16 connected to the first spreader 13, the second spreader 14, and the second spreader 14. The parts are connected.

The gantry 12 has a spreader holding portion 17 to which the second spreader 14 can be engaged. Further, the gantry 12 has a bracket 18 for holding the undulating winch 15.

(Spreader holding part)
The spreader holding portion 17 separates the second spreader 14 from the guy line 16, winds the undulating rope Rd with the undulating winch 15, with the second spreader 14 placed on the gantry 12, and winds the undulating rope Rd along the gantry 12. Is arranged so that the second spreader 14 is engaged by moving the first spreader 13 toward the first spreader 13.

As shown in FIG. 2, the spreader holding portion 17 includes a guide portion 19 that guides the second spreader 14 onto the gantry 12, and a locking portion 20 that defines a moving end of the second spreader 14 toward the first spreader 13. Can be configured to have. Further, the spreader holding portion 17 may be capable of attaching a fixing pin or the like for fixing the second spreader 14.

(bracket)
The bracket 18 that holds the undulating winch 15 preferably has a guide 21 that guides the second spreader 14. As described above, the bracket 18 having the guide 21 makes it easy to move the second spreader 14 along the gantry 12 and engage the spreader holding portion 17.

As the guide 21, a plate-shaped body arranged on the first spreader 13 side of the undulating winch 15 can be used. Further, the guide 21 may have, for example, a sliding member, a roller, or the like in order to reduce friction with the second spreader 14. Conversely, the second spreader 14 may be provided with, for example, a sliding member, a roller, or the like in order to reduce friction with the guide 21.

<Spreader>
The first spreader 13 and the second spreader 14 have a plurality of sheaves, and the undulating rope Rd is hung so as to reciprocate a plurality of times, and the distance between the first spreader 13 and the second spreader 14 changes according to the length of the undulating rope Rd. As a result, the undulation angle of the boom 3 is determined by adjusting the distance between the tip of the boom 3 and the tip of the gantry 12 via the guy line 16.

[Crane disassembly method]
The crane of FIG. 1 can be disassembled according to the embodiment of the crane disassembling method according to the present invention. In the crane disassembling method, as shown in FIG. 3, the second spreader 14 is lifted by an auxiliary crane (only the hook F is shown), and the second spreader 14 is pulled toward the boom 3 side by the miscellaneous rope Ro, and the undulating rope is used by the undulating winch 15. The step of engaging the second spreader 14 with the spreader holding portion 17 by winding Rd is included.

More specifically, the crane disassembling method includes a step of laying down the boom 3, a step of separating the guy line 16 from the second spreader 14, a step of engaging the second spreader 14 with the hook F of the auxiliary crane, and a boom. The step of separating the tip portion 8 of 3, the step of folding back the miscellaneous rope Ro with the folded sheave 11 and connecting it to the hook F of the second spreader 14 or the auxiliary crane, and the step of lifting the second spreader 14 with the auxiliary crane and the miscellaneous rope Ro The process of engaging the second spreader 14 with the spreader holding portion 17 by winding the undulating rope Rd with the undulating winch 15 while pulling to the boom 3 side, and the gantry 12 with the first spreader 13, the second spreader 14 and the undulating winch. A step of separating from the upper swing body 2 together with the 15 is included.

In the step of engaging the second spreader 14 with the spreader holding portion 17, the second spreader 14 and the undulating rope Rd reach the first spreader 13 side of the undulating winch 15 by lifting the second spreader 14 with an auxiliary crane. Until, do not interfere with other components.

As shown in FIG. 3, the second spreader 14 can be moved along the guide 21 by winding the undulating rope Rd with the undulating winch 15 from the state where the second spreader 14 is arranged on the guide 21 of the bracket 18. The second spreader 14 can be appropriately placed on the gantry 12, and the second spreader 14 can be smoothly engaged with the spreader holding portion 17 by moving the second spreader 14 along the gantry 12.

During this time, the miscellaneous winch 10 is driven until it engages with the spreader holding portion 17, and the second spreader 14 is pulled toward the boom 3 by the miscellaneous rope Ro, so that the second spreader 14 is oriented in the left-right direction (vertical to the undulating direction of the boom 3). It is possible to prevent the undulating rope Rd from coming off by applying tension to the undulating rope Rd spanned between the first spreader 13 and the second spreader 14 while suppressing the deviation in the above direction.

In this way, by engaging the second spreader 14 with the spreader holding portion 17 in a state where tension is applied to the undulating rope Rd, the tension can be held by the undulating rope Rd even after the crane is disassembled. Therefore, it is possible to prevent the undulating rope Rd from being disengaged from the first spreader 13 and the second spreader 14 while transporting the disassembled crane, and it is necessary to re-hang the undulating rope Rd at the time of the next assembly. That is, the crane can be easily reassembled after disassembly.

In the step of engaging the second spreader 14 with the spreader holding portion 17, the gantry 12 may be laid down backward as shown in the figure.

<Advantage>
As shown in FIG. 2, the crane can integrally separate the gantry 12, the first spreader 13, the second spreader 14, and the undulating winch 15 from the upper swing body 2. Therefore, the crane is easy to disassemble and assemble.

Further, in the crane, the gantry 12 is provided with a spreader holding portion 17 with which the second spreader 14 is engaged by winding the undulating rope Rd, so that the second spreader 14 is fixed to the gantry 12 at the time of disassembly. , The undulating rope Rd spanned between the first spreader 13 and the second spreader 14 can be tensioned to prevent the undulating rope Rd from coming off. Therefore, the crane is easy to assemble because the work of re-hooking the undulating rope Rd does not occur at the time of assembly.

In the crane, since the bracket 18 for attaching the undulating winch 15 to the gantry 12 has a guide 21 for guiding the second spreader 14, the work of engaging the second spreader 14 with the spreader holding portion 17 by winding the undulating rope Rd is performed. Disassembly is easier because it is easier.

The crane engages the second spreader 14 with the spreader holding portion 17 by providing the boom 3 with a miscellaneous winch 10 for winding the miscellaneous rope Ro and a folded sheave 11 for folding the miscellaneous rope Ro toward the gantry 12. During the work, tension can be easily applied to the undulating rope Rd, so that the disassembly is even easier.

[Second Embodiment]
FIG. 4 shows a crane according to a second embodiment of the present invention. The crane is undulated on the lower traveling body 1, the upper rotating body 2 mounted on the lower traveling body so as to be able to swivel in the horizontal direction, and the front part of the upper swivel body 2 (to lie down on the front side and stand up on the rear side). It is provided with a boom 3a that can be mounted so as to be able to swing) and an undulating mechanism 4a that undulates the boom 3a.

The configuration of the lower traveling body 1 and the upper swivel body 2 in the crane of FIG. 4 is the same as the configuration of the lower traveling body 1 and the upper swivel body 2 in the crane of FIG. Therefore, in the crane of FIG. 4, the same components as those of the crane of FIG. 1 are designated by the same reference numerals as those of FIG. 1, and duplicate description will be omitted.

〔boom〕
The boom 3a is extended to a base end portion 7 that is swingably attached to the upper swing body 2 back and forth, a tip portion 8 having a sheave that guides a suspension rope Rh that lifts a suspended load, and a tip portion of the tip portion 8. , Includes an extension 22 with sheaves that guide the auxiliary ropes Rs.

[Undulation mechanism]
The undulating mechanism 4a forms a pair with the mast 23 detachably and swingably attached to the upper swivel body 2, the first spreader 13a provided at the tip of the mast 23, and the first spreader 13a, and is attached to the upper swivel body 2. It has a second spreader 14a that is detachably attached, and an undulating winch 15 that is disposed on the mast 23 and winds up an undulating rope Rd that is hung on the first spreader 13a and the second spreader 14a.

In the crane of FIG. 4, the hoisting winch 9 for winding the suspended rope Rh and the auxiliary winch 24 for winding the auxiliary rope Rs are arranged on the mast 23.

<Mast>
The mast 23 is directly connected to its tip (the end opposite to the upper swing body 2) with the other end of the guy line 16 whose one end is connected to the tip of the boom 3a.

The mast 23 has a spreader holding portion 17a on the lower side surface to which the second spreader 14a can be engaged.

(Spreader holding part)
The spreader holding portion 17a winds the undulating rope Rd with the undulating winch 15 in a state where the second spreader 14a is separated from the upper swivel body 2, and moves the second spreader 14a toward the first spreader 13 along the mast 23. The second spreader 14a is arranged so as to engage with the second spreader 14a.

<Spreader>
The first spreader 13a and the second spreader 14a have a plurality of sheaves, and the undulating rope Rd is hung so as to reciprocate a plurality of times, and the distance between the first spreader 13a and the second spreader 14a changes according to the length of the undulating rope Rd. Thereby, by adjusting the angle of the mast 23, the undulation angle of the boom 3a connected to the mast 23 by the guy line 16 is determined.

[Crane disassembly method]
The crane of FIG. 4 can be disassembled according to the embodiment of the crane disassembling method according to the present invention. As shown in FIG. 5, the crane disassembling method involves separating the second spreader 14a from the upper swing body 2 and winding the undulating rope Rd with the undulating winch 15 in a state where the mast 23 is upright with an auxiliary crane. The step of engaging the second spreader 14a with the spreader holding portion 17a is included.

More specifically, the crane disassembling method includes a step of raising the mast 23 to lay down the boom 3a, a step of suspending and holding the mast 23 with an auxiliary crane, and a step of separating the guy line 16 from the mast 23. 2 A step of separating the spreader 14a from the upper swing body 2, a step of engaging the second spreader 14a with the spreader holding portion 17a by winding the undulating rope Rd with the undulating winch 15, and a step of engaging the mast 23 with the first spreader 13a, It includes a step of separating from the upper swivel body 2 together with the second spreader 14a, the hoisting winch 9, the undulating winch 15 and the auxiliary winch 24.

The mast 23 separated from the upper swivel body 2 is preferably placed on a pedestal so that the second spreader 14a and the undulating winch 15 do not come into contact with the floor surface.

<Advantage>
The crane can be easily disassembled and assembled because the mast 23, the first spreader 13a, the second spreader 14a, the hoisting winch 9, the undulating winch 15 and the auxiliary winch 24 can be integrally separated from the upper swing body 2. ..

Further, in the crane, the mast 23 is provided with a spreader holding portion 17a to which the second spreader 14a is engaged by winding the undulating rope Rd, so that the second spreader 14a is fixed to the mast 23 at the time of disassembly. , The undulating rope Rd spanned between the first spreader 13a and the second spreader 14a can be tensioned to prevent the undulating rope Rd from coming off. Therefore, the crane is easy to assemble because the work of re-hooking the undulating rope Rd does not occur at the time of assembly.

[Other embodiments]
The above embodiment does not limit the configuration of the present invention. Therefore, the above-described embodiment can be omitted, replaced or added with components of each part of the above-described embodiment based on the description of the present specification and common general technical knowledge, and all of them are construed to belong to the scope of the present invention. Should be.

As a specific example, in the crane, the configuration of the hoisting winch, the auxiliary winch, the miscellaneous work winch, and the like is arbitrary.

In the crane, a hoisting winch may be provided on the gantry.

The crane may be provided on the gantry independently of the bracket to which the undulating winch is attached and may have a guide to guide the second spreader during disassembly.

The crane and the method of disassembling the crane according to the present invention can be particularly suitably used as a configuration of a relatively large crane and a method of handling the same.

1 Lower traveling body 2 Upper swivel body 3, 3a Boom 4, 4a Undulating mechanism 5 Crawler 6 Operator's cabin 7 Base end 8 Tip 9 Winding winch 10 Miscellaneous winch 11 Folded sheave 12 Gantry 13, 13a First spreader 14, 14a 2nd spreader 15 undulating winch 16 guy line 17,17a spreader holding part 18 bracket 19 guide part 20 locking part 21 guide 22 extension part 23 mast 24 auxiliary winch F hook Rd undulating rope Rh hanging rope Ro miscellaneous rope Rs auxiliary rope

Claims (4)

With the lower running body,
The upper swivel mounted on the lower traveling body and
A boom that can be attached to the upper swing body so that it can be undulated,
Equipped with an undulating mechanism to undulate the above boom
The above undulation mechanism
A gantry or mast that can be attached to and detached from the upper swing body,
The first spreader provided at the tip of the gantry or mast,
The second spreader, which is paired with the first spreader,
It has an undulating winch that is disposed on the gantry or mast and winds up an undulating rope that is hung on the first spreader and the second spreader.
The gantry or mast, have a spreader holder in which the second spreader is engaged by the winding of the hoist cable,
The gantry or mast has a bracket to hold the undulating winch,
Crane that the bracket is to have a guide for guiding the second spreader. The crane according to claim 1, further comprising a hoisting winch that is disposed on the gantry or mast and winds up a suspended rope that is hung on the boom. With the lower running body,
The upper swivel mounted on the lower traveling body and
A boom that can be attached to the upper swing body so that it can be undulated,
Equipped with an undulating mechanism to undulate the above boom
The above undulation mechanism
A gantry that can be attached and detached to the upper swing body,
The first spreader provided at the tip of the gantry and
The second spreader, which is paired with the first spreader,
It has an undulating winch that is attached to the gantry and winds up the undulating rope that is hung on the first spreader and the second spreader.
The gantry is a method of disassembling a crane having a spreader holding portion with which the second spreader is engaged by winding the undulating rope.
A crane disassembling method in which the spreader holding portion is engaged with the second spreader by winding the undulating rope with the undulating winch while lifting the second spreader with an auxiliary crane and pulling it toward the boom side with a rope. The gantry or mast has a bracket to hold the undulating winch,
The crane disassembling method according to claim 3 , wherein the bracket has a guide for guiding the second spreader.

Images