JP4835209B2 - Crane winch removal method and upper swing body - Google Patents

Description

  The present invention relates to an upper swing body and a winch removing method constituting a self-propelled crane such as a crawler crane or a wheel crane.

  A crawler crane will be described as an example.

  The crawler crane is configured by mounting an upper swing body 1 shown in FIG. 9 on a crawler type lower traveling body so as to be rotatable about a vertical axis.

  FIG. 9 is a right side view showing the upper swing body, and FIG. 10 is a plan view thereof.

  The upper swing body 1 has a swing frame 2 as a base, a mounting portion 3 for mounting a boom (not shown), three winches 4, 5 and 6 for main winding, auxiliary winding and boom raising and lowering, and a boom raising and lowering member for raising and lowering the boom. The mast 7 and other necessary equipment are mounted.

  The mast 7 is attached to the front side portion 2a of the revolving frame 2 so that the base end portion 7a can rotate around a horizontal axis. The winches 4 to 6 are mounted at intervals as the main winding, the auxiliary winding, and the boom undulation with respect to the revolving frame 2 in order from the front in order to avoid the interference of the wire rope. Then, the hoisting wire rope of the boom hoisting winch 6 is shaped like a hook into the sheave of the lower spreader 8 provided at the rear portion of the swing frame 2 and the sheave of the upper spreader 9 provided at the upper end portion of the boom hoisting member (mast 7). It is handed over (see FIG. 10).

  As another upper revolving structure, as shown in FIG. 11, one having a gantry 30 having a gantry compression member 31 and a gantry tension member 32 instead of the mast 7 is known (for example, a patent). Reference 1). In the gantry 30, the base end portion 31a of the gantry compression member 31 can be rotated in the undulation direction on the front side portion 2a of the revolving frame 2, and the base end portion 32a of the gantry tension member 32 can be rotated on the rear side portion 2b of the revolving frame 2. The distal end portion 31b of the gantry compression member 31 and the distal end portion 32b of the gantry tensioning member 32 are coupled to each other so as to be rotatable relative to each other to form a gantry top portion 33, and the boom hoisting winch 6 is connected to the gantry top portion 33. A boom raising and lowering spreader (not shown in the figure) on which a wire rope drawn out from is hung is provided at the distal end portion 31 b of the gantry compression member 31. In FIG. 11, 3 is a mounting portion for attaching the boom, 4 is a main winding winch, 5 is an auxiliary winding winch, and 6 is a boom hoisting winch.

The crawler crane as described above is disassembled for transportation by a trailer or the like when moving to the work site. The decomposition is performed so as to satisfy the transportation weight allowed for the trailer or the like.
Registered Utility Model No. 2542385

  By the way, in order to reduce the transport weight of the upper revolving structure, it is a matter of course to remove the heavy boom. However, in large and super large cranes where the upper revolving structure is heavy, it is necessary to remove the winch. It may be. The winch is removed by removing the fixing bolts 4a and 5a holding the winch on the revolving frame (see FIG. 9) and hanging the winch with a crane. In many cases, the mast and the gantry are arranged so as to partially overlap each other. In this case, since the mast and the gantry obstruct the work of hanging the winch, it is necessary to remove the mast and the gantry.

  However, since the hoisting wire rope connected to the boom hoisting winch 6 is stretched over the mast and the gantry, it is necessary to remove the hoisting wire rope when removing the mast and the gantry, which requires a very long time. There was a problem that is required.

  Therefore, the present invention has been made to solve such a problem of the prior art, and without attaching the hoisting wire rope connected to the boom hoisting winch, and attaching the boom hoisting member (mast or gantry) to the revolving frame. It is intended to provide a crane winch removal method and an upper swing body used in the method, which can remove the winch disposed in front of the boom hoisting winch from the revolving frame in the state where it is left.

  The crane winch removing method according to claim 1 is characterized in that a swing frame on which a plurality of winches including a boom hoisting winch are mounted and fixed, and a boom hoisting spreader on which a wire rope drawn from the boom hoisting winch is hung. And a mast positioned above the plurality of winches in a lying posture in which a base end portion is rotatably connected to a front side portion of the swivel frame in a undulating direction, and the tip end portion lies backward. A method for removing a winch to be removed from the revolving frame of a crane equipped with the mast, in a state where the mast is in the lying down position, and a portion of a revolving frame corresponding to the portion of the mast. To form a standing fulcrum so that the mast can be rotated in the direction in which the mast stands. A connection switching step for releasing the connection between the end portion and the swivel frame; and a mast for maintaining the standing posture by rotating the mast about the rising fulcrum in a direction in which the base end portion is raised. An erection step, an unlocking step of releasing the fixation of the removal target winch to the swivel frame, and the removal target winch that has been released from the lower side of the mast in a state where the mast is in the standing posture. And a winch removing step.

  The crane winch removing method according to claim 2 is the crane winch removing method according to claim 1, wherein the mast is erected in the mast erecting step, and the removal target winch is removed from the revolving frame in the winch removing step. The removing operation is performed using a common auxiliary crane.

  The crane winch removing method according to claim 3 is the crane winch removing method according to claim 2, wherein the mast standing posture is maintained at both ends of the mast leading end and the rear side of the revolving frame. It is characterized in that it is performed by using a link to which are connected.

  The crane winch removing method according to claim 4 is the crane winch removing method according to claim 1, wherein in the mast erecting step, a mast erecting device is provided between the mast and the swivel frame. The mast is rotated in an upright direction around the upright fulcrum by an apparatus.

  The crane winch removing method according to claim 5 is the crane winch removing method according to claim 4, wherein, as the mast erecting device, a portion of the mast that is closer to the tip than the standing fulcrum and the swivel frame is used. A fluid pressure cylinder which can be expanded and contracted is interposed, and the mast is rotated in the standing direction about the standing fulcrum by contraction of the fluid pressure cylinder.

  The crane winch removing method according to claim 6 is the crane winch removing method according to claim 1, wherein in the mast erecting step, the mast is raised and lowered by being interposed between the mast and the turning frame. The mast raising and lowering cylinder that expands and contracts is extended in a state where the connection between the base end of the mast and the swivel frame is released, and thereby the base end of the mast is raised.

  The upper swing body of the crane according to claim 7 includes a swing frame on which a plurality of winches including a boom hoisting winch are mounted and fixed, and a boom hoisting spreader on which a wire rope drawn from the boom hoisting winch is hung. A mast positioned above the plurality of winches in a lying posture in which a proximal end portion is connected to a front side portion of the swivel frame so as to be rotatable in a undulating direction, and the distal end portion is tilted backward. The mast is provided on the tip portion side part and the revolving frame, respectively, and is interconnected so that the mast can be rotated in a standing position in a state where the mast is in the lying down posture. And an auxiliary connecting part that forms a standing fulcrum of the mast, and the connection between the base end part of the mast and the turning frame can be released. As described above, the base end portion of the mast and the turning frame are connected to each other, the connection between the base end portion of the mast and the turning frame is released, and the base end portion of the mast ascends about the standing fulcrum. The removal target winch is disposed so that the removal target winch of the winch can be removed from below the mast by rotating the mast in the standing direction in the direction. It is characterized by that.

  An upper swing body of the crane according to claim 8 is the upper swing body of the crane according to claim 7, further comprising a mast stand device that can be attached to and detached from both the mast in the lying posture and the swing frame, and the mast stand device. Is characterized in that the mast is rotated in the standing direction around the standing fulcrum while being interposed between the mast and the swivel frame.

  A crane winch removing method according to a ninth aspect of the present invention is such that a plurality of winches including a boom hoisting winch are mounted and fixed, and a front end portion of the swivel frame is connected to a front end portion so as to be rotatable in the hoisting direction. A gantry tension member that is connected to a rear side portion of the gantry compression member and a swivel frame so that a base end portion is pivotably movable in a undulation direction, and a distal end portion of the gantry compression member and a distal end portion of the gantry tension member And a boom raising / lowering spreader on which a wire rope pulled out from the boom raising / lowering winch is hung on the tip of the gantry. Removing the crane from the swivel frame with the gantry positioned above the plurality of winches in a lying posture A method for removing an elephant winch, wherein the gantry is in a lying posture, a connection switching step for releasing the connection between the base end of the gantry compression member and the swivel frame in the gantry, and the gantry compression A gantry compression member erecting step in which the member is erected by rotating the member about the top of the gantry in the direction in which the base end thereof rises, and the stance of the gantry is maintained, and the removal target winch is fixed to the revolving frame. A releasing step of releasing, and a winch removing step of removing the removal target winch from which the fixing has been released from below the gantry compressing member in a state where the gantry compressing member is in the standing posture.

  The crane winch removing method according to claim 10 is the crane winch removing method according to claim 9, wherein the gantry compressing member is erected in the gantry compressing member erecting step, and the detachable winch is removed in the winch detaching step. The operation of removing from the turning frame is performed using a common auxiliary crane.

  The crane winch removing method according to claim 11 is the crane winch removing method according to claim 10, wherein the standing posture of the gantry compression member in the gantry compression member standing step is maintained between the tip of the gantry compression member and the swivel frame. It is characterized by using a link having both end portions connected to the rear side portion.

  The crane winch removing method according to claim 12 is the crane winch removing method according to claim 9, wherein, in the gantry compression member erection step, the gantry compression member erection is established between a distal end portion of the gantry compression member and the revolving frame. An apparatus is provided, and the gantry compression member erecting device is used to rotate the gantry compression member in the standing direction around the top of the gantry.

  The crane winch removing method according to claim 13 is the crane winch removing method according to claim 12, wherein an extendable fluid pressure cylinder is interposed between the top of the gantry and the swivel frame as the gantry compression member erecting device. The gantry compression member is rotated in the standing direction around the top of the gantry by contraction of the fluid pressure cylinder.

  The crane winch removing method according to claim 14 is the crane winch removing method according to claim 9, wherein in the gantry compression member standing step, the crane is installed between the gantry compression member and the swivel frame. A gantry hoisting cylinder that expands and contracts to raise and lower the base end of the gantry compression member is extended by extending the base end of the gantry compression member and the swivel frame in a disconnected state. It is characterized by that.

  The upper swing body of the crane according to claim 15 is mounted with a plurality of winches including a boom hoisting winch, and a base frame is connected to the front side portion of the swing frame so as to be rotatable in the hoisting direction. A gantry tension member that is connected to a rear side portion of the gantry compression member and a swivel frame so that a base end portion is pivotably movable in a undulation direction, and a distal end portion of the gantry compression member and a distal end portion of the gantry tension member And a boom raising / lowering spreader on which a wire rope pulled out from the boom raising / lowering winch is hung on the tip of the gantry. And a gantry positioned above the plurality of winches in a lying posture, and a base end portion of the gantry compression member and the gantry The base end of these gantry compression members and the turning frame are connected so that the connection with the rotating frame can be released, the connection between the base end of the gantry compression member and the turning frame is released, and An object to be removed from the winch from below the gantry compression member by rotating the base end portion of the gantry compression member in an upright direction in a direction in which the base end portion of the gantry compression member ascends about the top of the gantry. The removal target winch is arranged so that the winch can be removed from below the gantry compression member.

  An upper swing body of the crane according to claim 16 is an upper swing body of the crane according to claim 15, which is interposed between the gantry compression member and the swing frame and expands and contracts to undulate the entire gantry. The gantry hoisting cylinder is provided with a hoisting cylinder, and the gantry hoisting cylinder is extended in a state where the base end portion of the gantry compressing member and the swivel frame are released to lift the base end portion of the gantry compressing member. It is characterized by being arranged in.

  In the case of using the crane winch removing method according to claim 1 and the crane upper turning body according to claim 7, the connection between the mast base end and the turning frame is released in a lying posture with the tip of the mast lying backward. Then, the tip of the mast and the swivel frame are connected to form a standing fulcrum. Then, the mast is rotated around the standing fulcrum to stand up, and the standing posture is maintained. After or before, the fixation of the removal target winch to the swing frame is released, and the release target winch that has been released from the mast is removed from below the mast, so that the mast wire rope connected to the boom hoisting winch can be removed without removing the mast wire rope. It becomes possible to remove the target winch to be removed while attaching to the revolving frame.

  According to claim 2, when an auxiliary crane is used to raise the mast and maintain the standing posture, a separate crane is required for the operation of lifting the removal target winch and removing it from the turning frame. By using another means other than the auxiliary crane, the removal operation of the winch to be removed from the turning frame can be performed by the auxiliary crane used for raising the mast, and only one auxiliary crane is required.

  In the case of claim 3, it is possible to use a single auxiliary crane by maintaining the mast standing posture with the link.

  According to the fourth aspect, the mast standing device can both rotate the mast in the standing direction around the standing fulcrum and maintain the mast standing posture. Therefore, it is possible to use one auxiliary crane including the operation of removing the winch to be removed from the turning frame.

  According to the fifth aspect of the present invention, the mast can be rotated about the standing fulcrum by the contraction of the fluid pressure cylinder, and the mast standing posture can be maintained by maintaining the fluid pressure cylinder constant. It can be performed.

  According to the sixth aspect of the present invention, even if the mast raising and lowering cylinder is used for raising and lowering the mast around the base end, the mast raising and lowering cylinder is released in a state where the connection between the base end of the mast and the turning frame is released. By extending the cylinder, it is possible to raise the mast base end with the upright fulcrum as the center, and the mast can be raised.

  According to the eighth aspect, the mast standing device can both rotate the mast around the standing fulcrum in the standing direction and maintain the mast standing posture. Therefore, it is possible to use one auxiliary crane including the operation of removing the winch to be removed from the turning frame.

  Further, in the case of the crane winch removing method according to claim 9 and the upper turning body of the crane according to claim 15, the base end portion of the gantry compression member and the turning frame are in a lying posture with the top of the gantry lying backward. Unlink. Along with this, the top of the gantry in which the distal end of the gantry compression member and the distal end of the gantry tension member are connected so as to be relatively rotatable forms an upright fulcrum. Then, the gantry compression member is rotated around the upright fulcrum to be upright, and the upright posture is maintained. After or before, the fixation of the removal target winch with respect to the turning frame is released, and by removing the release target winch that has been released from the lower side of the gantry compression member, without removing the hoisting wire rope connected to the boom hoisting winch, In addition, the target winch can be removed while the gantry is attached to the turning frame.

  According to claim 10, when an auxiliary crane is used to raise the gantry compression member and maintain the standing posture, another crane is required for the operation of lifting the removal target winch and removing it from the swivel frame. By maintaining the standing posture by another means other than the auxiliary crane, the removal operation of the winch to be removed from the turning frame can be performed by the auxiliary crane used for raising the gantry compression member. Just do it.

  According to the eleventh aspect, it is possible to use a single auxiliary crane by maintaining the standing posture of the gantry compression member with the link.

  According to the twelfth aspect, the gantry compression member erecting device can both rotate the gantry compression member around the top of the gantry in the standing direction and maintain the gantry compression member standing posture. Therefore, it is possible to use one auxiliary crane including the operation of removing the winch to be removed from the turning frame.

  According to the thirteenth aspect, the gantry compression member can be rotated in the standing direction around the top of the gantry by contracting the fluid pressure cylinder, and the gantry compression member can be maintained by keeping the fluid pressure cylinder constant. The standing posture can be maintained.

  According to the fourteenth aspect, even if the gantry hoisting cylinder is used for raising and lowering the gantry compression member around the base end portion, the connection between the base end portion of the gantry compression member and the swivel frame is released. By extending the gantry raising / lowering cylinder, the base end portion of the gantry compression member can be raised around the base end portion of the gantry compression member, and the gantry compression member can be erected.

  According to the sixteenth aspect, even when the gantry hoisting cylinder is used for raising and lowering the gantry compression member around the base end, the connection between the base end of the gantry compression member and the swivel frame is released. By extending the gantry raising / lowering cylinder, the base end portion of the gantry compression member can be raised around the base end portion of the gantry compression member, and the gantry compression member can be erected.

  The present invention will be specifically described below. In the following embodiments, an upper swing body for a crawler crane is taken as an application target.

(First embodiment)
FIG. 1 is a right side view showing the upper swing body according to the first embodiment, and the upper swing body is provided with a mast as a boom hoisting member. In FIG. 1, the same parts as those shown in FIGS.

  In the upper swing body 1 of the first embodiment, a mounting portion 3 for mounting a boom (not shown) is provided at the front end portion of the swing frame 2, and a first end portion 7a for mounting a base end portion 7a of the mast 7 is immediately behind the mounting portion 3. A 1-pin coupling portion 10 is provided, and a main winding winch 4, an auxiliary winding winch 5, and a boom hoisting winch 6 are sequentially provided behind the first pin coupling portion 10. Further, a lower spreader 8 is provided at the rear part of the swing frame 2, and an upper spreader 9 is provided at the tip 7 b of the mast 7. Between these lower spreader 8 and upper spreader 9, a boom hoisting winch 6 is provided. The undulating wire rope connected to is stretched over. Both ends of a mast hoisting arm 23 (see FIG. 5), which will be described later, are connected to a portion of the mast 7 near the base end portion 7a and the first pin coupling portion 10, and the mast hoisting arm 23 and the first pin coupling portion 10 are Both ends of a mast hoisting cylinder 22 (see FIG. 5), which will be described later, are connected, and both ends of the mast hoisting arm 23 and both ends of the mast hoisting cylinder 22 are detachable.

  The mast 7 can be laid down rearward by, for example, the mast hoisting cylinder 22, and the winches 4 and 5 to be removed are arranged below the mast 7, and the upper portions of the winches 4 and 5 to be removed are moved by the mast 7. Part is covered.

  The first pin coupling portion 10 includes a pin 13 inserted into a coupling hole 11 formed in the front side portion 2 a provided on the front upper side of the revolving frame 2 and a coupling hole 12 formed in the base end portion 7 a of the mast 7. It has composition which has. The pin 13 is detachable, and the first pin coupling portion 10 is pin-coupled by inserting the pin 13 into the coupling holes 11 and 12. In this state, the mast 7 can be rotated in the front-rear direction (undulation direction) about the first pin coupling portion 10 by the mast raising / lowering cylinder 22. That is, the 1st pin coupling | bond part 10 functions as an undulation fulcrum.

  Each of the above-described components is the same as the conventional one. However, in the upper swing body 1 of the first embodiment, unlike the conventional one, the rear side of the boom hoisting winch 6, in the illustrated example, at the substantially rear end portion of the swing frame 2. A second pin coupling portion 14 that can be in a pin coupling state or a state in which the pin coupling is released is provided, and both ends are detachably coupled to the rear side portion 2b of the revolving frame 2 and the tip end portion 7b of the mast 7. And a mast standing liquid pressure cylinder 20 capable of bringing the mast 7 into an unconnected state. The second pin coupling portion 14 and the cylinder 20 are used only when removing the removal target winches 4 and 5. The 2nd pin coupling | bond part 14 functions as a standing fulcrum used as the center which rotates the mast 7 in the direction which the base end part 7a raises at the time of the said removal. The cylinder 20 functions as a mast erecting device that rotates the mast 7 in the erecting direction around the erecting fulcrum.

  As shown in FIG. 2, the second pin coupling portion 14 is inserted into a coupling hole 15 a formed in the fixing piece 15 provided in the revolving frame 2 and a coupling hole 16 a formed in the fixing piece 16 provided in the mast 7. 1, with the tip 7 b of the mast 7 lying backward as shown in FIG. 1, the positions of the coupling holes 15 a, 16 a are aligned with respect to the coupling holes 15 a, 16 a. The pin 17 is detachable. The second pin coupling portion 14 becomes a pin coupling state by inserting the pin 17 into both the coupling holes 15a and 16a, and functions as the upright fulcrum. Then, the pin connection is released by removing the pin 17.

  The cylinder 20 has a base end portion 7a of the mast 7 centered on the second pin coupling portion 14 when the pin coupling of the first pin coupling portion 10 is released and the second pin coupling portion 14 is in the pin coupling state. In the illustrated example, the cylinder block 20a is attached to the rear side 2b of the revolving frame 2 and the cylinder rod 20b is attached to the tip 7b of the mast 7. The cylinder rod 20b is detachable from the mast 7.

  Next, a method of removing the main winding winch 4 and the auxiliary winding winch 5, which are the winches to be removed from the upper swing body 1 in front of the boom hoisting winch 6, will be described.

  First, the state shown in FIG. 1 is set. That is, the boom (not shown) is removed from the revolving frame 2 separated from the lower traveling body (not shown), the mast 7 is laid backward, and both the coupling holes 15a and 16a of the second pin coupling portion 14 are placed. The pin 17 is inserted into the cylinder frame 20 and the portion near the tip 7b of the mast 7 and the revolving frame 2 are pin-coupled by the second pin coupling portion 14, and the cylinder rod of the cylinder 20 in which the cylinder block 20a side is attached to the revolving frame 2 20b is attached to the tip 7b of the mast 7. From the state shown in FIG. 1, the pin 13 of the first pin coupling portion 10 on the base end portion 7 a side of the mast 7 lying on the rear side is removed, and the pin connection between the base end portion 7 a and the swivel frame 2 is performed. Solve (connection switching step).

  Next, as shown in FIG. 3, the cylinder rod 20 b of the cylinder 20 is retracted in the direction of the arrow, thereby rotating the mast 7 about the second pin coupling portion (standing fulcrum) 14. The base end portion 7a is raised from the revolving frame 2, and is maintained in an inclined state in the illustrated example (mast standing step).

  Next, the above-described tilted state is maintained, and the fixing of the winches 4 and 5 to the revolving frame 2 is released using the gap A formed below the base end portion 7a of the mast 7, specifically, the winch 4, The fixing bolts 4a and 5a which fix 5 to the revolving frame 2 are removed (fixing releasing step). In addition, when it is possible to release the fixation of the winches 4 and 5 to be removed from the revolving frame 2 without setting the mast 7 in an inclined state, the fixing release step may be performed before the mast standing step or the connection switching step. .

  Next, the object winch 4 to be removed is suspended using, for example, an auxiliary crane (not shown) while maintaining the standing posture, and the object winch 4 to be removed is opened below and at the front of the base end portion 7 a of the mast 7. After removing from the swivel frame 2 through the part B, and subsequently lifting the winch 5 to be removed, the winch 5 is similarly lifted and then removed from the swivel frame 2 through the open part B (winch removal step).

  Thereafter, for example, the cylinder 20 is operated to return the mast 7 to a horizontal position so as to be suitable for transportation.

  In the embodiment described above, the cylinder rod 20b is detachably attached to the mast 7 with respect to the cylinder 20. However, the present invention is not limited to this, and the cylinder block 20a is attached to the revolving frame 2. The cylinder block 20a and the cylinder rod 20b may be detachable.

(Second Embodiment)
FIG. 4 is a right side view showing the upper swing body 1A according to the second embodiment. In FIG. 4, the same parts as those shown in FIG.

  The upper swing body 1 </ b> A is configured to maintain a mast standing posture using a link 21 having a fixed length whose both ends are attached to the rear portion of the swing frame 2 and the upper end portion of the mast 7. Other components are the same as in the first embodiment.

  One end of this link 21 is connected to the rear part of the revolving frame 2 with a connecting bolt 22a, and the other end is connected to the tip part 7b of the mast 7 with a connecting bolt 22b. Further, by removing at least one of the connecting bolts 22a or 22b and suspending the mast 7 with an auxiliary crane, the first pin coupling portion 10 or the second pin coupling portion 14 in the pin coupling state is swung. At this time, one of the first pin coupling portion 10 and the second pin coupling portion 14 is brought into a state in which the pin coupling is released.

  The removal target winches 4 and 5 are removed from the upper swing body 1A as follows.

  First, the state shown in FIG. 1 (however, in this embodiment, there is no cylinder 20) is set. That is, the boom (not shown) is removed from the revolving frame 2 separated from the lower traveling body (not shown), the mast 7 is laid backward, and the pins are connected to both the connecting holes 15a and 16a of the second pin connecting portion 14. 17 is inserted, and the portion near the tip 7 b of the mast 7 and the revolving frame 2 are pin-coupled by the second pin coupling portion 14. From the state shown in FIG. 1, the pin 13 of the first pin coupling portion 10 on the base end portion 7a side of the mast 7 lying backward is removed, and the pin coupling between the base end portion 7a and the swivel frame 2 is released. (Connection switching step).

  Next, the mast 7 is lifted by an auxiliary crane (not shown), the mast 7 is rotated around the second pin coupling portion 14, the base end portion 7 a of the mast 7 is raised from the revolving frame 2, and both ends of the link 21 are moved. The rear frame 2b of the swivel frame 2 and the tip 7b of the mast 7 are connected by connecting bolts 22a and 22b, and the base end portion 7a of the mast 7 rises from the swivel frame 2, and in an inclined state in the illustrated example. Maintain (mast standing up process).

  Next, the fixing bolts 4a and 5a are removed from the removal target winches 4 and 5 using the gap A to release the fixing to the revolving frame 2 (fixing releasing step). In addition, you may perform this fixing release process before a mast standing-up process or a connection switching process similarly to before.

  Next, while maintaining the standing posture, the removal target winch 4 is suspended using, for example, an auxiliary crane or another crane used in the mast standing step, and the removal target winch 4 is removed from the revolving frame 2 through the opening portion B. Take away. Subsequently, the removal target winch 5 is similarly lifted and then removed from the revolving frame 2 through the opening portion B (winch removal step).

  Thereafter, for example, the mast 7 is lifted with a crane to remove at least one of the connecting bolts 22a or 22b of the link 21, and the mast 7 is returned to a horizontal position so as to be suitable for transportation.

(Third embodiment)
FIG. 5 is a right side view showing the upper swing body 1B according to the third embodiment. In FIG. 5, the same parts as those shown in FIG.

  The upper swing body 1B is configured to remove the winch using a mast hoisting cylinder 22 and a mast hoisting arm 23 for hoisting the mast 7 during normal use. In other words, the above-described cylinder 20 and link 21 are not used. Other components are the same as in the first embodiment. The mast hoisting cylinder 22 is connected to a portion of the mast 7 near the base end 7a and the revolving frame 2 via a mast hoisting arm 23, and the mast 7 is moved around the first pin coupling portion 10 by expansion and contraction. It is intended to swing.

  The case where the removal object winches 4 and 5 are removed from the upper swing body 1B will be described.

  First, the state shown in FIG. 1 (however, there is no cylinder 20 and a mast hoisting cylinder 22 and a mast hoisting arm 23 are present). That is, the boom (not shown) is removed from the revolving frame 2 separated from the lower traveling body (not shown), the mast 7 is laid backward, and the pins are connected to both the connecting holes 15a and 16a of the second pin connecting portion 14. 17 is inserted, and the portion near the tip 7 b of the mast 7 and the revolving frame 2 are pin-coupled by the second pin coupling portion 14. Further, the mast hoisting cylinder 22 and the mast hoisting arm 23 are attached when they are separated from the upper-part turning body 1B in accordance with the disassembly for reducing the transport weight. From the state shown in FIG. 1, the pin 13 of the first pin coupling portion 10 on the base end portion 7a side of the mast 7 lying backward is removed, and the pin coupling between the base end portion 7a and the swivel frame 2 is released. (Connection switching step).

  Next, the mast hoisting cylinder 22 is actuated to rotate the mast 7 about the second pin coupling portion 14, and the mast base end portion 7 a is raised from the revolving frame 2. Maintain (mast standing up process). That is, the mast raising cylinder 22 functions as the mast raising device.

  Next, the fixing bolts 4a and 5a are removed from the removal target winches 4 and 5 using the gap A to release the fixing to the revolving frame 2 (fixing releasing step). In addition, you may perform this fixing release process before a mast standing-up process or a connection switching process similarly to before.

  Next, with the above-mentioned standing posture maintained, the removal target winch 4 is suspended using, for example, an auxiliary crane (not shown), the removal target winch 4 is removed from the revolving frame 2 through the open portion B, and then the removal target winch 5. In the same manner, after lifting, after lifting, it is removed from the revolving frame 2 through the opening portion B (winch removing step). In this winch removing process, when the width W1 of the winch is larger than the interval W between the frames 7c on both sides in the width direction of the mast 7 as shown in FIG. 6, for example, the lifting target winch 4 or 5 being lifted is rotated around the vertical axis. It is only necessary to turn to the opening part B and to pass through.

  Thereafter, the mast hoisting cylinder 22 is actuated to return the mast 7 to a horizontal position so as to be suitable for transportation.

  In the third embodiment, an upper swing body having a mast hoisting cylinder and a mast hoisting arm is taken as an example. However, the present invention is not limited to this, and the mast hoisting arm is omitted, and the mast is moved only by the mast hoisting cylinder. The present invention can be similarly applied to the upper revolving structure configured to undulate.

  Moreover, although the case where the main winding winch and the auxiliary winding winch are removed has been described in the first to third embodiments described above, the present invention is not limited thereto. Specifically, the present invention can be similarly applied to other winches disposed on the front side of the boom hoisting winch, such as a third winch.

  Furthermore, in the first to third embodiments described above, the second pin coupling portion that couples the swivel frame and the mast is disposed at the substantially rear end portion of the swivel frame. However, the present invention is not limited thereto, and the boom is not limited thereto. The position may be an arbitrary position behind the undulating winch. However, when the mast is in the standing posture, the winch can be removed from between the mast base end portion of the open part B and the swivel frame even if the front end of the mast contacts the rear end of the swivel frame. It needs to be in a proper position.

  Furthermore, in the first to third embodiments described above, the second pin coupling portion for pin coupling the swivel frame and the mast is formed in the coupling hole formed in the fixed piece on the swivel frame side and the fixed piece on the mast side. Although a configuration in which a pin is inserted into the coupling hole is used, the present invention is not limited to this, and a configuration in which a pin is provided on one of the swivel frame and the mast and a pin receiving recess is provided on the other is possible. Of course.

(Fourth embodiment)
Unlike the upper revolving structure in which the boom hoisting member includes a mast as in the first to third embodiments, the fourth embodiment performs winch removal for the upper revolving body in which the boom hoisting member includes a gantry. It is a form.

  7 and 8 are both right side views showing the upper-part turning body 1C provided with the gantry according to the fourth embodiment. FIG. 7 shows a state in which the gantry is tilted backward, and FIG. 8 shows a state in which the winch is removed. Indicates. 7 and 8 denote the same parts in FIG. 11 with the same numbers.

  The removal target winches 4 and 5 from the upper swing body 1C are removed as follows.

  First, the state shown in FIG. That is, the boom (not shown) is removed from the revolving frame 2 separated from the lower traveling body (not shown), and the gantry 30 is laid backward. That is, the gantry compression member 31 is tilted backward, the middle of the gantry tension member 32 is bent forward, and the gantry top 33 is tilted backward. At this time, the base end portion 31a of the gantry compression member 31 is connected to the front side portion 2a of the revolving frame 2, and the base end portion 32a of the gantry tension member 32 is connected to the rear side portion 2b of the revolving frame 2 so as to be rotatable in the undulation direction. The distal end portion 31b of the gantry compression member 31 and the distal end portion 32b of the gantry tension member 32 are connected to each other at a gantry top portion 33 so as to be relatively rotatable. In addition, a part of the removal target winches 4 and 5 is covered by the gantry compression member 31. Moreover, the gantry raising / lowering cylinder 35 by which both ends were rotatably connected with the gantry compression member 31 and the turning frame 2 is left.

  Subsequently, from the state shown in FIG. 7, the pin 13 of the first pin coupling portion 10 on the base end portion 31a side of the gantry compression member 31 lying backward is removed, and the base end portion 31a and the swivel frame 2 are removed. The pin connection is removed (connection switching step).

  Next, the gantry raising / lowering cylinder 35 is operated to rotate the gantry compression member 31 around the distal end portion 31 b connected to the gantry top portion 33, and the base end portion 31 a of the gantry compression member 31 is raised from the revolving frame 2. The standing posture is maintained in an inclined state in the illustrated example (gantry compression member standing step). That is, the gantry raising / lowering cylinder 35 functions as a gantry compression member standing device.

  Next, the fixing bolts 4a and 5a are removed from the removal target winches 4 and 5 using the gap A to release the fixing to the revolving frame 2 (fixing releasing step). In addition, you may perform this fixing release process before a mast standing-up process or a connection switching process similarly to before.

  Next, with the above-mentioned standing posture maintained, the removal target winch 4 is suspended using, for example, an auxiliary crane (not shown), the removal target winch 4 is removed from the revolving frame 2 through the open portion B, and then the removal target winch 5. In the same manner, after lifting, after lifting, it is removed from the revolving frame 2 through the opening portion B (winch removing step). In this winch removing process, when the width W1 of the winch is larger than the interval W between the frames 7c on both sides in the width direction of the mast 7 as shown in FIG. 6, for example, the lifting target winch 4 or 5 being lifted is rotated around the vertical axis. It is only necessary to turn to the opening part B and to pass through.

  Thereafter, the gantry hoisting cylinder 35 is operated to return the gantry compression member 31 to a horizontal position so as to be suitable for transportation.

  In the fourth embodiment, the gantry hoisting cylinder 35 for raising and lowering the gantry 30 is used, and the base end portion 31a of the gantry compression member 31 is raised from the swivel frame 2 to give an upright posture. The present invention is not limited to this. For example, as shown by a two-dot chain line in FIG. 8, a hydraulic cylinder 36 having both ends attached to the top part 33 of the gantry and the attachment part 2c at the rear end of the revolving frame 2 may be used as the gantry compression member erecting device. Alternatively, the gantry compression member 31 may be placed in an upright posture with an auxiliary crane, and both ends of a link (not shown) may be attached to the gantry top portion 33 and the attachment portion 2c to maintain the upright posture.

  Moreover, although the winch arrange | positioned ahead of a boom raising / lowering winch is made into the removal object in the description mentioned above, this invention is not limited to this. For example, if the transport weight limit is exceeded even after removing the main and auxiliary winding winches, the boom hoisting winch is driven to rotate, the rope is wound from the spreader onto the boom hoisting winch, and then the boom hoisting winch is removed. You may make it remove like a target winch. Also, when removing the mast, when the upper spreader on the upper end of the mast is attached to the mast by pin connection, the pin connection to the mast of the upper spreader is not performed without winding the rope between the boom hoisting winch and the spreader. You may make it remove a part and remove a mast.

  Furthermore, in the first to fourth embodiments described above, the present invention is applied to the upper swing body of the crawler crane. However, the present invention is not limited to this, and may be applied to the upper swing body of a wheel crane such as an alternator crane. Can do.

It is a right view which shows the upper turning body which concerns on 1st Embodiment of this invention. It is a right view which shows the structure of the 2nd pin coupling part provided in the upper revolving body of FIG. It is explanatory drawing (right side view) at the time of removing the object winch from the upper revolving body of FIG. It is a right view which shows the upper turning body which concerns on 2nd Embodiment of this invention. It is a right view which shows the upper turning body which concerns on 3rd Embodiment of this invention. It is a top view which shows the example of 1 relationship between the width | variety of a winch and the width | variety of a mast. It is a right view which shows the upper turning body which concerns on 4th Embodiment of this invention, and shows the state which laid down the gantry back. It is a right view which shows the upper turning body which concerns on 4th Embodiment of this invention, and shows the state which removes a winch. It is a right view which shows the upper turning body which has the conventional mast. It is a top view which shows the upper turning body which has the conventional mast. It is a right view which shows the upper turning body which has the conventional gantry.

Explanation of symbols

1 Upper revolving structure 2 Revolving frame 4 Main winding winch (target winch)
5 Supplementary winch (target winch)
6 Boom hoisting winch 7 Mast 7a Lower end 10 First pin coupling portion 14 Second pin coupling portion (standing fulcrum)
20 Mast Standing Fluid Pressure Cylinder 21 Link 22 Mast Lifting Cylinder 30 Gantry 31 Gantry Compression Member 32 Gantry Pulling Member 33 Gantry Top 35 Gantry Lifting Cylinder 36 Fluid Pressure Cylinder

Claims (16)

A swivel frame on which a plurality of winches including a boom hoisting winch are mounted and fixed, and a boom hoisting spreader on which a wire rope pulled out from the boom hoisting winch is hung are provided at a distal end portion, and a base end portion is disposed above To be removed from the revolving frame of the crane, which is connected to the front side portion of the revolving frame so as to be rotatable in the up-and-down direction, and has a mast positioned above the plurality of winches in a lying posture with the tip end lying backward. A method for removing a winch,
In a state where the mast is in the lying down posture, a portion on the tip end side of the mast and a portion of the turning frame corresponding to the portion are connected so as to be rotatable in a direction in which the mast stands up. And a connection switching step for releasing the connection between the base end of the mast and the swivel frame,
A mast erecting step for erecting the mast by rotating the mast around the erecting fulcrum in a direction in which the base end thereof rises, and maintaining the erect posture;
A fixing releasing step for releasing fixing of the detachable target winch to the turning frame;
A winch removing method for a crane, comprising: a winch removing step of removing the removal target winch, which has been released from the fixed state, from below the mast in a state where the mast is in the standing posture. The crane winch removing method according to claim 1,
A crane winch removing method, wherein the operation of raising the mast in the mast raising step and the operation of removing the removal target winch from the turning frame in the winch removing step are performed using a common auxiliary crane. In the method of removing the winch of the crane according to claim 2,
A crane winch removing method, wherein the mast standing posture in the mast standing step is maintained using a link having both ends connected to the tip of the mast and the rear side of the turning frame. The crane winch removing method according to claim 1,
In the mast erecting step, a mast erecting device is interposed between the mast and the swivel frame, and the mast is rotated in the erecting direction around the erecting fulcrum by the mast erecting device. How to remove the winch. The method of removing a crane winch according to claim 4,
As the mast erecting device, a fluid pressure cylinder that can be expanded and contracted is interposed between a portion of the mast that is closer to the tip than the standing fulcrum and the swivel frame, and the mast is raised by contraction of the fluid pressure cylinder. A method for removing a winch of a crane, wherein the crane is rotated in a standing direction around a fulcrum. The crane winch removing method according to claim 1,
In the mast erecting step, the mast hoisting cylinder that is interposed between the mast and the revolving frame and expands and contracts so as to elevate the mast is released from the connection between the base end of the mast and the revolving frame. A method for removing a winch of a crane, wherein the base end portion of the mast is raised by being stretched in a stretched state. A swivel frame on which a plurality of winches including a boom hoisting winch are mounted and fixed;
A boom hoisting spreader on which a wire rope drawn from the boom hoisting winch is hung is provided at the distal end, and a base end is connected to the front side of the swivel frame so as to be rotatable in the hoisting direction. A mast positioned above the plurality of winches in a lying posture lying backward;
The mast is provided on the tip portion side part and the revolving frame, respectively, and is interconnected so that the mast can be rotated in a standing position in a state where the mast is in the lying down posture. Auxiliary connecting part that forms the standing fulcrum of the mast,
The base end of the mast and the swivel frame are connected so that the connection between the base end of the mast and the swivel frame can be released,
The mast is released from the connection between the base end of the mast and the swivel frame, and the mast rotates in a standing direction in a direction in which the base end of the mast ascends about the standing fulcrum. An upper swing body of a crane, wherein the removal target winch is arranged so that the removal target winch of the winch can be removed from below the mast from below. The upper swing body of the crane according to claim 7,
A mast erecting device that can be attached to and detached from both the mast in the lying posture and the swivel frame is provided, and the mast erecting device is interposed between the mast and the swivel frame, and the mast is centered on the standing fulcrum. An upper swing body of a crane characterized in that it is rotated in a standing direction. A swivel frame on which a plurality of winches including a boom hoisting winch are mounted and fixed, a gantry compression member whose base end is rotatably connected to the front side of the swivel frame in the hoisting direction, and the rear of the swivel frame A gantry tension member whose base end portion is connected to the side portion so as to be rotatable in the undulation direction, and a distal end portion of the gantry compression member and a distal end portion of the gantry tension member are connected to be rotatable relative to each other. A boom raising and lowering spreader is provided at the tip of the gantry and a wire rope drawn from the boom raising and lowering winch is provided at the tip, and the plurality of winches are in a lying posture with the gantry top lying backward. A method for removing a winch to be removed from the swing frame of a crane having a gantry located above,
In a state where the gantry is in the lying posture, a connection switching step for releasing the connection between the base end portion of the gantry compression member in the gantry and the turning frame,
A gantry compression member erecting step in which the gantry compression member is erected by rotating the gantry compression member around the top of the gantry in a direction in which the base end thereof is raised;
A fixing releasing step for releasing fixing of the detachable target winch to the turning frame;
A method for removing a winch from a crane, comprising: a winch removing step of removing, from the lower side of the gantry compression member, the winch to be removed that has been released from the fixed state while the gantry compression member is in the standing posture. The crane winch removing method according to claim 9,
An operation of raising the gantry compression member in the gantry compression member standing step and an operation of removing the object winch to be removed from the turning frame in the winch removal step using a common auxiliary crane. How to remove the winch. The crane winch removing method according to claim 10,
Maintaining the standing posture of the gantry compression member in the gantry compression member standing step is performed using a link having both ends connected to the front end portion of the gantry compression member and the rear side portion of the turning frame. How to remove the winch. The crane winch removing method according to claim 9,
In the gantry compression member erecting step, a gantry compression member erecting device is interposed between the distal end portion of the gantry compression member and the revolving frame, and the gantry compression member erecting device is centered on the top of the gantry compression member. A method for removing a winch of a crane, wherein the crane is rotated in a standing direction. The method for removing a winch of a crane according to claim 12,
As the gantry compression member erecting device, an extendable fluid pressure cylinder is interposed between the gantry top and the swivel frame, and by contraction of the fluid pressure cylinder, the gantry compression member is raised in the standing direction around the gantry top. A method of removing a winch of a crane, characterized by rotating the crane. The crane winch removing method according to claim 9,
In the gantry compression member erecting step, a gantry raising / lowering cylinder that is interposed between the gantry compression member and the swivel frame so as to extend and lower the entire gantry, and a base end portion of the gantry compression member and the gantry compression member A crane winch removal method, wherein the base end portion of the gantry compression member is lifted by being extended in a state where the connection with the revolving frame is released. A swivel frame on which a plurality of winches including a boom hoisting winch are mounted and fixed, a gantry compression member whose base end is rotatably connected to the front side of the swivel frame in the hoisting direction, and the rear of the swivel frame A gantry tension member whose base end portion is connected to the side portion so as to be rotatable in the undulation direction, and a distal end portion of the gantry compression member and a distal end portion of the gantry tension member are connected to be rotatable relative to each other. A boom raising and lowering spreader is provided at the tip of the gantry and a wire rope drawn from the boom raising and lowering winch is provided at the tip, and the plurality of winches are in a lying posture with the gantry top lying backward. With a gantry located above,
The base end of the gantry compression member and the swivel frame are connected so that the connection between the base end of the gantry compression member and the swivel frame can be released,
The connection between the base end of the gantry compression member and the swivel frame is released, and the base end of the gantry compression member rises in a direction in which the base end of the gantry compression member rises around the top of the gantry. The removal target winch is arranged so that the removal target winch of the winch can be removed from below the gantry compression member by rotating in the direction. The upper swing body of the crane as a feature. The upper swing body of the crane according to claim 15,
A gantry hoisting cylinder is provided between the gantry compressing member and the swivel frame so as to expand and contract so as to undulate the entire gantry. The gantry hoisting cylinder includes a base end portion of the gantry compressing member and the gantry hoisting cylinder. An upper swing body of a crane, which is arranged to elevate a base end portion of the gantry compression member by extending in a state where the connection with the swing frame is released.

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