JP2020164278A - Rope wiring method and guide sheave device for work machine - Google Patents

Abstract

To provide a wiring method for a work machine capable of reducing the burden on an operator of wiring work for winding a main rope taken out of a main winch around a sheave on a tip part of a derricking body.SOLUTION: A tip part of a leaving rope LW delivered from a leaving winch 50 is connected to a work device 90 and the work device is made to travel on the ground toward an upper boom 16E from a lower boom 16A. After the leaving rope LW is stretched between a sheave block 361 and a second boom sheave 162, the tip part of the leaving rope LW is connected to the work device 90 again such that the leaving rope LW moves over a boom 16 and the work device 90 is made to travel toward the lower boom 16A from the upper boom 16E. After the leaving rope LW and a main hoist rope MW are connected to each other, the leaving rope LW is wound by the leaving winch 50.SELECTED DRAWING: Figure 2

Description

The present invention relates to a rope wiring method for a work machine and a guide sheave device.

Conventionally, as a work machine, a crane including a machine body and an undulating body capable of undulating the machine body is known. Such a crane is assembled so that it can be worked in a work place or the like.

The crane assembly work as described above includes the wiring work of the hoisting rope (main rope). The crane has a winch (main winch) provided at the base end of the airframe or the undulating body, an idler sheave (point sheave) provided at the tip of the undulating body, and a hook including a sheave block (hook sheave). Have more. In the wiring operation, the hoisting rope pulled out from the winch is pulled by the operator from the base end to the tip end of the undulating body, and then passed over the idler sheave and the sheave block of the hook a plurality of times. Such a hoisting rope is for raising and lowering an object to be transported via a hanger, and the diameter and weight of the hoisting rope are relatively large. Therefore, the labor required for the worker to pull the undulating body from the base end side to the tip end side becomes very large.

On the other hand, as disclosed in Patent Document 1, the hoisting rope is hung between the idler sheave and the sheave block of the hook by using a leaving rope having a diameter and weight smaller than that of the hoisting rope. There is.

In Patent Document 1, the crane includes a leaving winch. The leaving winch is provided at the base end of the undulating body. The leaving rope pulled out from the leaving winch is extended from the base end to the tip of the undulating body below the undulating body. Then, after the leaving rope is hung between the idler sheave and the sheave block of the hook, the leaving rope is passed from the tip of the undulating body via the sheave provided on the upper side (rear side) of the tip of the undulating body. It is further stretched to the base end. The tip of the leaving rope is then connected to a hoisting rope pulled out of a winch provided at the base end of the fuselage or undulation. Then, when the leaving winch winds up the leaving rope while the winch unwinds the hoisting rope, the leaving rope guides the hoisting rope, and the hoisting rope hangs between the idler sheave and the sheave block of the hook at the tip of the undulating body. Passed. As a result, the operator does not have to pull the hoisting rope having a large weight from the base end portion to the tip end portion of the undulating body, and the burden on the operator is reduced.

Japanese Unexamined Patent Publication No. 2012-35937

In the technique described in Patent Document 1, the work of the operator pulling the hoisting rope from the base end to the base end of the undulating body is reduced, but the worker pulls the leaving rope from the tip end to the base end of the undulating body. Work to pull with the department is required. Leaving ropes are lighter than hoisting ropes, but they are heavy and place a heavy burden on workers. Further, when the undulating body is a long member such as a boom, the operator needs to move a distance of several tens of meters to about 100 meters while holding the leaving rope. Further, the operator hangs the leaving rope between the idler sheave and the sheave block of the hook at the tip of the undulating body, and then, while holding the leaving rope, moves the upper surface of the undulating body from the tip to the base end. Must move to. At this time, since the upper surface of the undulating body is at a height of several meters from the ground, high attention is required at high places, which places a heavy burden on the operator. As described above, even in the wiring method of the work machine using the conventional leaving winch, there is a problem that the burden on the operator is heavy.

The present invention has been made in view of the above problems, and it is possible to reduce the burden on the operator in the rope wiring work of hanging the main rope drawn from the main winch on the sheave at the tip of the undulating body. It is an object of the present invention to provide a rope wiring method and a guide sheave device for a machine.

The rope wiring method of the work machine according to one aspect of the present invention includes the machine body, the base end portion of the undulating body undulatingly mounted on the machine body, and the tip end portion of the undulating body opposite to the machine body in the horizontal direction from the machine body. In a work machine having a undulating body capable of taking a horizontal posture extending along the undulating body and a main winch attached to the base end portion of the undulating body or capable of winding and feeding the main rope attached to the machine body. A winch drum which is a rope wiring method of a work machine for hanging the main rope unwound from the main winch to the tip of the undulating body, and can wind and unwind the leaving rope by rotating. A winch mounting step of mounting a leaving winch having a winch on the base end portion of the undulating body, a traveling portion capable of traveling on the ground, a first connecting portion capable of being connected to the tip end portion of the leaving rope, and the horizontal A preparatory step for preparing a work assisting device having a second connecting portion which is arranged above the upper surface portion of the undulating body in a posture and can be connected to the tip end portion of the leaving rope, and the undulating Of the undulating body placement step including rotatably connecting the body base end portion to the machine body and arranging the undulating body in the horizontal posture, and at least the undulating body base end portion of the undulating body placement step. After being connected to the machine body, the leaving rope is extended below the base end portion of the undulating body from the leaving winch, and the tip portion of the leaving rope is connected to the first connection portion of the work assist device. While paying out the leaving rope by the outbound connection step and the leaving winch, the traveling portion of the work assist device is moved from the base end portion of the undulating body to the tip end portion of the undulating body in the horizontal posture on the left side or the right side of the undulating body. The leaving rope outbound traction step of pulling the tip of the leaving rope to the tip of the undulating body by traveling on the ground toward the position to be arranged, and the leaving from the first connection portion of the work assist device. A leaving rope wiring step of removing the tip of the rope and hanging the leaving rope on at least one sheave arranged at the tip of the undulating body, and the leaving with the leaving rope hung on the at least one sheave. A leaving rope return path connecting step of connecting the tip of the rope to the second connecting portion of the work assist device, and the leaving winch. The traveling portion of the work assisting device is moved so that the tip portion of the leaving rope connected to the second connecting portion moves above the upper surface portion of the undulating body while further extending the leaving rope. By traveling on the ground from the tip of the undulating body toward the base end of the undulating body on the left or right side of the undulating body, the tip of the leaving rope is moved from the tip of the undulating body to at least the base end of the undulating body. The leaving rope return traction step of pulling up to, and the tip of the leaving rope being removed from the second connection of the work assisting device, and the tip of the leaving rope pulled out from the main winch. By winding the leaving rope by the leaving winch while paying out the main rope by the main winch and the rope connecting step of connecting the tip portion, the main rope is pulled from the undulating body base end portion by the leaving rope. The main rope wiring step of guiding the tip of the undulating body to the tip of the undulating body and then hanging it on the at least one sheave is provided.

According to this method, the leaving rope is connected to the first connection portion or the second connection portion of the work assist device to run the traveling portion, so that the leaving rope unwound from the leaving winch is undulated from the base end portion of the undulating body. The work of pulling to the tip of the body and the work of pulling the leaving rope hung on at least one sheave from the tip of the undulating body to the base end of the undulating body can be performed on behalf of the operator. Therefore, it is possible to reduce the burden on the operator in the wiring work of the main rope. In addition, since the traveling portion of the work assist device travels on the ground on the left or right side of the undulating body, the rope wiring work is efficiently performed by traveling the work assist device even if the undulating body is placed on the ground. be able to.

In the above method, the winch mounting step is at a position inside the base end of the undulating body with respect to both ends of the base end of the undulating body in the left-right direction, and is placed on the sheave from both ends in the left-right direction. The leaving winch is mounted at a close position so that the winch drum can rotate around a rotation center axis extending in the left-right direction, and the leaving rope outbound connection step involves pulling the leaving rope from the leaving winch. It extends below the base end of the undulating body, and of the lower surface of the base end of the undulating body, is closer to the tip of the undulating winch than the leaving winch and inside the both ends of the base end of the undulating body in the left-right direction. After hanging the leaving rope on the first guide sheave that is arranged and can rotate around the rotation center axis extending in the vertical direction, the undulating body on the left side and the right side of the undulating body on which the work assist device is arranged. The leaving rope is pulled out to the outside of the work assisting device, and the tip of the leaving rope is connected to the first connecting portion of the work assist device. The leaving rope outbound traction step is carried out from the leaving winch. It may include pulling the leaving rope via the guide sheave to the tip of the undulating body by the work assisting device.

According to this method, the leaving rope unwound from the leaving winch that rotates around the rotation center axis that extends in the left-right direction is rotated around the rotation center axis that extends in the vertical direction by the first guide sheave that extends in the left-right direction of the undulating body. Can be pulled out. Therefore, it is possible to easily connect the leaving rope to the work assisting device on the left side or the right side of the undulating body while stably maintaining the feeding operation of the leaving winch, and the work assisting device connects the leaving rope to the undulating body base end. It can be stably pulled from the part to the tip of the undulating body.

In the above method, in the leaving rope outbound connection step, the leaving rope is extended below the base end of the undulating body from the leaving winch, the leaving rope is hung on the first guide sheave, and further, the undulating body base. The first end of the undulating body on the lower surface of the end on the side of the tip of the undulating body with respect to the first guide sheave and on the left and right sides of the undulating body on which the work assist device is arranged. After hanging the leaving rope on the second guide sheave rotatably arranged around the rotation center axis extending in the vertical direction at the position of, the tip of the leaving rope is connected to the first connecting portion of the work assist device. In the leaving rope outbound traction step, the leaving rope is pulled out from the leaving winch and passed through the first guide sheave and the second guide sheave to the tip of the undulating body by the work assisting device. It may include things.

According to this method, the direction of the leaving rope pulled out of the undulating body in the left-right direction via the first guide sheave can be changed toward the tip of the undulating body by the second guide sheave. As a result, while stably maintaining the feeding operation of the leaving winch and suppressing the feeding path of the leaving rope from moving forward directly under the undulating body, the leaving rope is undulated on the left side or the right side of the undulating body. It can be stably pulled from the end to the tip of the undulating body. Therefore, it is prevented that the leaving rope interferes with other members below the undulating body.

In the above method, in the main rope wiring step, the position of the second guide sheave is arranged in the leaving rope outbound connection step. From the first position where the second guide sheave is arranged, the lower surface of the base end portion of the undulating body. To change the position of the base end of the undulating body to a second position inside the both ends in the left-right direction and to change the direction of the rotation center axis of the second guide sheave from the left-right direction to the up-down direction. It may include supporting the leaving rope between the plurality of sheaves and the leaving winch by the first guide sheave and the second guide sheave.

According to this method, the second guide sheave for guiding the leaving rope to the outside in the left-right direction of the undulating body is guided in the leaving rope outbound connection step, and the leaving rope is guided toward the first guide sheave in the main rope wiring step. Can be used as a sheave. At this time, since both the first guide sheave and the second guide sheave are arranged at the center of the undulating body in the left-right direction, the leaving rope can be guided linearly, and the load on the leaving rope is reduced. can do.

In the above method, the winch mounting step is at a position inside the base end of the undulating body with respect to both ends of the base end of the undulating body in the left-right direction, and is placed on the sheave from both ends in the left-right direction. The preparatory step comprises mounting the leaving winch in close proximity, with the first connection relative to the traveling portion of the work assisting device located on the left or right side of the boom relative to the bottom of the boom. In the leaving rope outbound connection step, which includes moving, the leaving rope is extended below the base end of the undulating body from the leaving winch, and the lower surface of the base end of the undulating body is more than the leaving winch. After hanging the leaving rope on the first guide sheaves located on the undulating body tip side and inside the undulating body base end portions in the left-right direction of the undulating body base end portion, the first The leaving rope outbound traction step includes connecting the tip of the leaving rope to one connecting portion, and the traveling rope undulations while holding the leaving rope below the boom by the first connecting portion. It may include running on the ground on the left or right side of the body.

According to this method, in the leaving rope outbound traction step, the leaving rope can be guided linearly below the undulating body, and the load on the leaving rope can be reduced.

In the above method, as the undulating body, at least one undulating body intermediate portion is provided between the undulating body base end portion and the undulating body tip portion, and the undulating body base end portion and the at least one undulating body intermediate portion are provided. Further, the undulating body is formed by connecting the portion and the tip end portion of the undulating body to each other, and the undulating body arranging step can rotate the base end portion of the undulating body to the machine body. The undulating body is arranged in the horizontal posture by sequentially connecting the at least one undulating body intermediate portion and the undulating body tip portion to the tip end side of the undulating body base end portion. Even if the undulating body arranging step and the leaving rope outbound traction step are performed in parallel so that the traveling portion of the work assisting device travels according to the length of the undulating body in the undulating body arranging step. Good.

In the above method, in the leaving rope outbound traction step, the traveling portion is made to travel on the ground on one of the left and right sides of the boom, and in the leaving rope return traction step, the traveling portion is moved to the left and right sides of the boom. The other of them may run on the ground.

According to this method, the work assist device prevents the work assist device from stepping on the leaving rope that is routed to the ground on the outward route on the return route. Therefore, the leaving rope is prevented from being entangled or damaged.

The guide sheave device according to another aspect of the present invention includes the machine body, the base end portion of the undulating body undulatingly mounted on the machine body, and the tip end portion of the undulating body opposite to the undulating body, and extends along the horizontal direction from the machine body. A undulating body capable of taking a horizontal posture, a main winch attached to the undulating body base end portion or the machine body and capable of winding and feeding the main rope, and a undulating body base end portion in the left-right direction. In a work machine having a leaving winch that is rotatably supported around a rotation center axis extending to and capable of winding and feeding a leaving rope, the main rope unwound from the main winch is referred to the tip of the undulating body. A guide sheave device that assists the rope wiring work to be hung on the portion, and is a lower surface portion of the base end portion of the undulating body in the horizontal posture, which is closer to the tip end portion of the undulating body than the leaving winch and the undulating body. The direction of the leaving rope, which is rotatably mounted around the rotation center axis extending in the vertical direction at a position inside the left and right ends of the base end and is extended from the leaving winch toward the tip of the undulating body. A first guide sheave that rotates so as to allow the leaving rope to advance while supporting the leaving rope so as to change outward in the left-right direction of the undulating body, and the first guide sheave that is fed out from the leaving winch. The sheave support portion includes a second guide sheave capable of supporting the leaving rope via the guide sheave and a sheave support portion capable of supporting the second guide sheave in the first support state. In the first support state, the second guide sheave is extended from the leaving winch, and the direction of the leaving rope via the first guide sheave is outside the lateral direction of the undulating winch. The position of the base end of the undulating body in the horizontal posture toward the tip of the undulating body with respect to the first guide sheave and the undulating body base so as to be able to be changed toward. The second guide sheave is supported so that the second guide sheave can rotate about a rotation center axis extending in the vertical direction at the position of the left end portion or the right end portion of the lower surface portion of the end portion.

According to this configuration, in the wiring work of the main rope of the work machine, the leaving rope pulled out from the leaving winch toward the tip of the undulating body is sequentially arranged in the first guide sheave and the second guide sheave in the first support state. Can be hung. Therefore, the leaving rope can be pulled to the tip of the undulating body on the left and right outer sides of the undulating body while stably maintaining the feeding operation of the leaving winch. Further, it is possible to prevent the feeding path of the leaving rope from moving forward immediately under the undulating body, and to prevent the leaving rope from interfering with other members.

In the above configuration, the sheave support portion can be switched between the first support state and the second support state that supports the second guide sheave in a state different from the first support state, and the sheave In the second support state, the support portion is such that the second guide sheave can support the leaving rope together with the first guide sheave between the tip of the undulating body and the leaving winch. Of the undulating body base end portions in a horizontal posture, the position is closer to the undulating body tip portion side than the first guide sheave, and the lower surface portion of the undulating body base end portion is located at both ends in the left-right direction. The second guide sheave may be supported so that the second guide sheave can rotate at the inner position.

According to this configuration, when the leaving rope is wound up by the leaving winch while the main rope is drawn out by the main winch, the leaving rope from the tip of the undulating body to the leaving winch at the base end of the undulating body is set as the second support state. It can be guided along the lower surface of the undulating body by the second guide sheave and the first guide sheave. Therefore, it is possible to wind the leaving rope with a larger tension than when the leaving rope is wound via the side of the undulating body while the second guide sheave is in the first support state. Become.

In the above configuration, the sheave support portion supports the second guide sheave so that in the second support state, the second guide sheave can rotate around a rotation center axis extending along the left-right direction. It may be one.

According to this configuration, when the leaving rope is wound by the leaving winch, the leaving rope can be wound with a larger tension as compared with the case where the second guide sheave rotates around the rotation center axis extending in the vertical direction. it can.

According to the present invention, there is provided a rope wiring method for a work machine capable of reducing the burden on the operator in the rope wiring work of hanging the main rope drawn from the main winch on the sheave at the tip of the undulating body. ..

It is a side view which shows the state which wiring work of a main rope is performed in the work machine which concerns on one Embodiment of this invention. It is a top view which shows the state that the wiring work of the main rope is performed in the work machine which concerns on one Embodiment of this invention. It is an enlarged side view which shows the state which the wiring work of the main rope is performed in the work machine which concerns on one Embodiment of this invention. It is an enlarged side view which shows the state which the wiring work of the main rope is performed in the work machine which concerns on one Embodiment of this invention. It is an enlarged side view which shows the state which the wiring work of the main rope is performed in the work machine which concerns on one Embodiment of this invention. It is a rear view which shows the state which the leaving rope is connected to the auxiliary work apparatus in the wiring work of the main rope of the work machine which concerns on one Embodiment of this invention. It is a top view which shows the state which the leaving rope was pulled out from the leaving winch provided in the undulating body of the work machine in the wiring work of the main rope of the work machine which concerns on one Embodiment of this invention. It is a side view which shows the state which the leaving rope was pulled out from the leaving winch provided in the undulating body of the work machine in the wiring work of the main rope of the work machine which concerns on one Embodiment of this invention. It is a front view which shows the arrangement of the guide sheave provided in the undulating body of a work machine in the wiring work of the main rope of the work machine which concerns on one Embodiment of this invention. It is a perspective view of the guide sheave unit used in the wiring work of the main rope of the work machine which concerns on one Embodiment of this invention. It is a rear view of the guide sheave unit used in the wiring work of the main rope of the work machine which concerns on one Embodiment of this invention. It is an enlarged rear view of the guide sheave unit used in the wiring work of the main rope of the work machine which concerns on one Embodiment of this invention. It is an enlarged rear view of the guide sheave unit used in the wiring work of the main rope of the work machine which concerns on one Embodiment of this invention. It is a rear view which shows the state which the leaving rope is connected to the auxiliary work apparatus in the wiring work of the main rope of the work machine which concerns on the modified embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing how the main winding rope MW (main rope) is being wired in the crane 1 (working machine) according to the present embodiment. Hereinafter, in each figure, the directions of "upper", "lower", "left", "right", "front" and "rear" are shown, and the directions are related to the present embodiment. It is shown for convenience to explain the rope wiring method of the crane 1, and does not limit the rope wiring method of the work machine according to the present invention. Further, the directions of "top", "bottom", "left", "right", "front" and "rear" in each figure are shown to correspond to each direction seen from the driver's seat of the crane 1. ..

With reference to FIG. 1, the crane 1 includes a lower traveling body 10, an upper rotating body 12 (airframe), a mast 14, a boom 16, a main winding winch 18, an auxiliary winding winch 20, and a boom undulating winch 22. The sheave 24, the sheave 26, the boom undulating rope 28, the guy line 30, the guy link 32, the bucks stop 34, the hook 36, and the leaving winch 50 are provided.

The lower traveling body 10 is capable of traveling on the ground. The upper swivel body 12 is supported by the lower traveling body 10 so as to be swivelable around a rotation center axis extending in the vertical direction.

The mast 14 is rotatably (undulating) around a horizontal rotation center axis in the front portion of the upper swing body 12.

The boom 16 is rotatably (undulated) supported around a rotation center axis parallel to the rotation center axis of the mast 14 in a portion of the upper swing body 12 in front of the mast 14.

The main winding winch 18 is arranged immediately behind the mast 14 of the upper swing body 12. The main winding winch 18 performs a winding operation and a feeding operation of the main winding rope MW (FIG. 2) (main rope).

The auxiliary winding winch 20 is arranged immediately behind the main winding winch 18 of the upper swing body 12. The supplementary winding winch 20 performs a winding operation and a feeding operation of a supplementary winding rope (not shown).

The boom undulating winch 22 is arranged immediately behind the auxiliary winding winch 20 in the upper swing body 12. The boom undulating winch 22 performs a winding operation and a feeding operation of the boom undulating rope 28.

Specifically, a sheave 24 and a sheave 26 are arranged at the rear end of the upper swing body 12. The sheave 26 is connected to the tip of the mast 14 by a guy line 30. Further, the tip of the mast 14 is connected to the tip of the boom 16 by a guy link 32. The boom undulation rope 28 pulled out from the boom undulation winch 22 is hung a plurality of times between the sheave 24 and the sheave 26. As a result, when the boom undulating winch 22 extends the boom undulating rope 28, the distance between the sheave 24 and the sheave 26 increases, and the boom 16 lays forward in conjunction with the rotation of the mast 14 forward. On the other hand, when the boom undulating winch 22 winds up the boom undulating rope 28, the distance between the sheave 24 and the sheave 26 is shortened, and the boom 16 stands up in conjunction with the mast 14 rotating backward. The backstop 34 comes into contact with the upper swing body 12 in response to the standing operation of the boom 16 to prevent the boom 16 from further rotating (falling) backward.

With reference to FIG. 1, the boom 16 includes a lower boom 16A (the base end of the undulating body), an intermediate boom 16B, an intermediate boom 16C, an intermediate boom 16D, and an upper boom 16E (the tip of the undulating body). Have. That is, the boom 16 includes a lower boom 16A undulatingly attached to the upper swing body 12 and an upper boom 16E opposite to the lower boom 16A, and as shown in FIG. 1, a horizontal posture extending from the upper swing body 12 in the horizontal direction. It is possible to take.

In the present embodiment, the boom 16 includes three (at least one) intermediate booms (middle undulations) between the lower boom 16A and the upper boom 16E, the lower boom 16A, the three intermediate booms, and the upper boom. The boom 16 is configured by connecting the 16Es to each other. The boom 16 has a rectangular shape when viewed in a cross section orthogonal to the longitudinal direction thereof, and includes four main pipes and a lattice pipe connecting the main pipes to each other. The number of intermediate booms is not limited to the above, and may not include intermediate booms.

Further, the upper boom 16E of the boom 16 has a first boom sheave 161 and a second boom sheave 162 (point sheave) (FIG. 1). The first boom sheave 161 is rotatably supported by the upper surface portion of the upper boom 16E of the boom 16 of FIG. 1 (the rear portion of the upper boom 16E of the standing boom 16). On the other hand, the second boom sheave 162 is rotatably supported by the lower surface portion of the upper boom 16E of the boom 16 of FIG. 1 (the front portion of the upper boom 16E of the standing boom 16). The first boom sheave 161 and the second boom sheave 162 have an outer peripheral surface capable of supporting the main winding rope MW or the leaving rope LW.

The hook 36 is hung from the upper boom 16E via the main winding rope MW, and is connected to the suspended load to lift the suspended load. The hook 36 has a sheave block 361 (hook sheave) in which a plurality of sheaves are arranged adjacent to each other in the left-right direction.

The leaving winch 50 is mounted near the base end portion of the lower boom 16A, and has a winch drum capable of winding and feeding the leaving rope LW by rotating. The winch drum rotates about a horizontal rotation center axis. The leaving winch 50 may be arranged on the front side portion of the swivel frame of the upper swivel body 12 of the crane 1 or on the crane body side such as a car body or an axle.

In the wiring work of the main winding rope MW using the leaving winch 50, first, the tip of the leaving rope LW drawn downward from the leaving winch 50 is pulled from the lower boom 16A to the upper boom 16E through a position lower than the boom 16. Will be done. After that, when the leaving rope LW is hung between the sheave block 361 and the second boom sheave 162 a plurality of times around the upper boom 16E, the tip of the leaving rope LW passes through the first boom sheave 161 and the upper boom. It is towed from 16E to the lower boom 16A. At this time, the leaving rope LW moves on the upper surface portion of the boom 16. The tip of the leaving rope LW pulled to the tip of the lower boom 16A and the upper swing body 12 is connected to the tip of the main rope MW pulled out from the main winch 18. Then, when the leaving winch 50 winds up the leaving rope LW while the main winding winch 18 pays out the main winding rope MW, the main winding rope MW is guided from the lower boom 16A to the upper boom 16E by the leaving rope LW, and then sheaves. It is hung between the block 361 and the second boom sheave 162. After that, the tip of the main winding rope MW is detached from the tip of the leaving rope LW and fixed to the upper boom 16E. Further, the leaving rope LW is wound up to the end by the leaving winch 50. As a result, the wiring work from the main winding winch 18 of the main winding rope MW made of a heavy object to the second boom sheave 162 and the sheave block 361 is realized.

Conventionally, in the above-mentioned wiring work, the operator pulls the leaving rope LW drawn from the leaving winch 50 while moving on the ground from the lower boom 16A to the upper boom 16E, and at the same time, the sheave block 361 and the second boom sheave. The operator was pulling the tip of the leaving rope LW hung between 162 and the upper boom 16E to the lower boom 16A while moving on the boom 16. In the present embodiment, in order to reduce such heavy work of the operator, the working device 90 executes the towing work of the leaving rope LW.

FIG. 2 is a plan view showing how the main winding rope MW is being wired in the crane 1 according to the present embodiment. In the present embodiment, the tip of the leaving rope LW drawn out from the leaving winch 50 is connected to the working device 90, and the working device 90 travels on the ground from the lower boom 16A to the upper boom 16E, for example, on the left side of the boom 16 (FIG. 2 arrow D1). After that, when the tip of the leaving rope LW is removed from the working device 90, the leaving rope LW is hung between the sheave block 361 and the second boom sheave 162 (FIG. 1). During this time, the working device 90 is moving to the right side of the tip of the boom 16 (arrow D2 in FIG. 2). Then, the tip of the leaving rope LW is connected to the working device 90 again via the sheave block 361 (FIG. 1), and the working device 90 moves from the upper boom 16E so that the leaving rope LW moves above the boom 16. Travel on the ground to the lower boom 16A. Then, after the tip of the leaving rope LW and the tip of the main winding rope MW pulled out from the main winding winch 18 are connected to each other, the leaving winch 50 winds up the leaving rope LW. As a result, the main winding rope MW is guided from the main winding winch 18 to the sheave block 361 and the second boom sheave 162 and hung between both sheaves. In the following, the structure of the crane 1 and the working device 90 for carrying out such a wiring method will be described.

3 to 5 are enlarged side views showing how the main winding rope MW is being wired in the crane 1. FIG. 6 is a rear view showing a state in which the leaving rope LW is connected to the work device 90 (auxiliary work device) in the wiring work of the main winding rope MW of the crane 1. In FIG. 6, the cross sections of some members such as the car body 910, the crawler unit 911, and the crawler 912 are drawn. 7 and 8 are a plan view and a side view showing a state in which the leaving rope LW is pulled out from the leaving winch 50 provided on the boom 16 of the crane 1 in the wiring work of the main winding rope MW of the crane 1. FIG. 9 is a front view showing the arrangement of guide sheaves provided on the boom 16 of the crane 1 in the wiring work of the main winding rope MW of the crane 1.

With reference to FIG. 3, the working device 90 used for the wiring work of the main winding rope MW in the present embodiment includes a hydraulic excavator. The work device 90 includes a lower traveling body 91, an upper swivel body 92, a cab 93, a work attachment 94, and an outward wire connecting portion 95 (first connecting portion).

The lower traveling body 91 can travel on the ground. With reference to FIG. 6, the lower traveling body 91 has a car body 910, a pair of left and right crawler units 911, and a pair of left and right crawlers 912. In FIG. 6, only the crawler unit 911 and the crawler 912 on the right side are shown.

The upper rotating body 92 (FIG. 3) is supported by the lower traveling body 91 so that it can rotate around the rotation center axis extending in the vertical direction on the lower traveling body 91. The cab 93 is arranged at the left front end portion of the upper swing body 92, and allows an operator who operates the working device 90 to board inside. The work attachment 94 is undulatingly supported on the right side of the cab 93 of the upper swing body 92. Further, the work attachment 94 can be swiveled around a rotation center axis extending in the vertical direction together with the upper swivel body 92 (see FIGS. 3 and 5). The arrangement of the cab 93 and the work attachment 94 is not limited to the above mode, and the left and right sides of the cab 93 and the work attachment 94 may be interchanged.

The work attachment 94 includes a boom, an arm rotatably supported around a rotation center axis horizontal to the tip of the boom, and a bucket rotatably supported around a rotation center axis horizontal to the tip of the arm. And, including.

The outbound wire connecting portion 95 is arranged below the lower surface portion (FIG. 4) of the boom 16 in the horizontal posture and can be connected to the tip end portion of the leaving rope LW. In another embodiment, the outward wire connecting portion 95 may be arranged at substantially the same height as the lower surface portion (FIG. 4) of the boom 16 in the horizontal posture. With reference to FIG. 6, the outbound wire connection 95 has a bracket 951 and a hook 952. The bracket 951 projects from the side surface of the crawler unit 911 on the right side of the working device 90 toward the right, and the tip end portion of the bracket 951 is bent downward. The hook 952 is fixed to the tip of the bracket 951. As shown in FIG. 6, the hook 952 can grip (fix) the tip end portion of the leaving rope LW. The tip of the bracket 951 is not limited to being bent downward, and may be bent backward or toward the boom 16.

Further, the work attachment 94 has a return wire connecting portion 94S (second connecting portion) (FIG. 5). The return wire connecting portion 94S is arranged above the upper surface portion (FIG. 5) of the boom 16 in the horizontal posture and can be connected to the tip end portion of the leaving rope LW. The return wire connecting portion 94S is arranged on the side surface of the bucket of the work attachment 94. The work attachment 94 also has the same structure as the hook 952 of the outward wire connecting portion 95.

On the other hand, referring to FIGS. 7 to 9, the lower boom 16A of the boom 16 includes the above-mentioned leaving winch 50, a guide sheave 51 (FIG. 8), a first guide sheave 52 (guide sheave device), and a second. It has a guide sheave unit 53S (FIG. 10) (guide sheave device) including a guide sheave 53.

The leaving winch 50 rotates on a shaft 50S (FIG. 7) extending so as to connect between the left and right frames of the lower boom 16A on the front side (tip side) of the base end portion (rotation center axis of the boom 16) of the lower boom 16A. It is supported as much as possible.

The guide sheave 51 (FIG. 8) is located in front of the leaving winch 50 (on the upper boom 16E side) and at the center of the lower boom 16A in the left-right direction (left and right of the lower boom 16A) on the lower surface of the lower boom 16A (boom 16). It is arranged at a position inside of both ends) and is rotatably supported by the lower boom 16A around a rotation center axis extending in the left-right direction.

The first guide sheave 52 is located in front of the leaving winch 50 and the guide sheave 51 and at the center of the lower boom 16A in the left-right direction (position inside the left and right ends of the lower boom 16A) on the lower surface of the lower boom 16A. It is arranged and rotatably supported around a central axis of rotation extending in the vertical direction.

10 and 11 are a perspective view and a rear view of the guide sheave unit 53S used in the wiring work of the main winding rope MW of the crane 1 according to the present embodiment. 12 and 13 are enlarged rear views of the guide sheave unit 53S.

The guide sheave unit 53S is fixed to the lower surface portion of the tip end portion (front end portion in FIG. 7) of the lower boom 16A. The guide sheave unit 53S has a second guide sheave 53, a main frame 60, a guide plate 61, and a support unit 62 (FIG. 10).

The second guide sheave 53 has an outer peripheral surface capable of supporting the leaving rope LW unwound from the leaving winch 50.

The main frame 60, the guide plate 61, and the support unit 62 (sheave support portion) rotatably support the second guide sheave 53 at the first guide position and the second guide position.

The main frame 60 is fixed to a main pipe 16A1 (FIG. 9) extending in the left-right direction on the lower surface of the lower boom 16A. The main frame 60 has a bottom surface portion 601, a front surface portion 602 fixed to the main pipe 16A1, a right side surface portion 603, and a left side surface portion 604. A pair of front and rear guide grooves 601S are formed on the bottom surface portion 601 along the left-right direction. The guide plate 61 is arranged so as to extend downward from the rear end portion of the bottom surface portion 601 and is movable in the left-right direction along the guide groove 601S.

The support unit 62 rotatably supports the second guide sheave 53 and is detachable from the guide plate 61 in two postures. In FIG. 13, the guide plate 61 is arranged at the left end of the guide groove 601S, and the support unit 62 is bolted to the guide plate 61 at three locations P3, P4, and P5. The position of the second guide sheave 53 at this time is defined as the first guide position. When the second guide sheave 53 is arranged at the first guide position, the second guide sheave 53 is on the upper boom 16E side (front side) and the left side of the boom 16 of the lower surface portion of the lower boom 16A with respect to the first guide sheave 52. It is rotatably held around the rotation center axis extending in the vertical direction at the end (the side of the left side and the right side where the work device 90 is arranged).

Further, in FIG. 12, the guide plate 61 is arranged at the left end of the guide groove 601S, and the support unit 62 is bolted to the guide plate 61 at three locations P1, P2, and P3. In this state, the position of the second guide sheave 53 in a state where the guide plate 61 is moved to the right end portion of the guide groove 601S is defined as the second guide position. At this time, the second guide sheave 53 is arranged at the center of the lower boom 16A in the left-right direction (position inside the left and right ends of the lower boom 16A). When the second guide sheave 53 is arranged at the second guide position, the second guide sheave 53 rotates around the center axis of rotation extending in the left-right direction at the center portion of the lower surface portion of the lower boom 16A (boom 16) in the left-right direction. Can be retained. As described above, in the present embodiment, the position of the second guide sheave 53 can be changed between the first guide position and the second guide position by sliding and moving along the left-right direction.

<Crane rope wiring method>
The wiring method (rope wiring method) of the main winding rope MW of the crane 1 according to the present embodiment will be described in more detail with reference to FIGS. 2 to 13. The wiring method according to the present embodiment includes a winch mounting step, a preparatory step, a undulating body placement step, a leaving rope outbound connection step, a leaving rope outbound traction step, a leaving rope wiring step, and a leaving rope return connection step. , Leaving rope return route towing step, rope connecting step, and main rope wiring step.

In the winch mounting process, the operator mounts the main winding winch 18 that enables winding and unwinding of the main winding rope MW on the upper swing body 12, and the leaving winch that enables winding and feeding of the leaving rope LW. 50 is attached to the lower boom 16A of the boom 16. The leaving winch 50 is arranged inside the lower boom 16A at both ends in the left-right direction and closer to the second boom sheave 162 in the left-right direction than both ends. As a result, the straight line connecting the leaving winch 50 and the second boom sheave 162 extends along the longitudinal direction of the boom 16 (the direction connecting the lower boom 16A and the upper boom 16E, the front-rear direction), so that the leaving winch 50 described later The winding operation is stably executed. The main winch 18 may be attached to the lower boom 16A of the boom 16. Further, the main winding winch 18 and the leaving winch 50 may be pre-mounted on the crane 1 prior to the wiring work of the main winding rope MW, or may be pre-fixed to the crane 1.

In the preparatory step, the lower traveling body 91 (running portion) capable of traveling on the ground and the outward route which is arranged below the lower surface portion of the boom 16 in a horizontal posture and can be connected to the tip portion of the leaving rope LW. A work device 90 having a wire connecting portion 95 and a return wire connecting portion 94S arranged above the upper surface portion of the boom 16 in a horizontal posture and capable of being connected to the tip end portion of the leaving rope LW is prepared. Will be done. In the present embodiment, as shown in FIGS. 2 and 3, the working device 90 is arranged on the ground on the left side of the lower boom 16A or the intermediate boom 16B of the boom 16. The order of the winch mounting process and the preparation process is not particularly limited. Further, the undulating body arrangement step includes rotatably connecting the lower boom 16A to the upper swing body 12 and arranging the boom 16 in the horizontal posture. At this time, the entire boom 16 may be connected to the upper swing body 12, or each boom member may be connected in order after the lower boom 16A is connected to the upper swing body 12.

In the leaving rope outbound connection step, after at least the lower boom 16A is connected to the upper swing body 12 to be in a horizontal posture in the undulating body arrangement step, the leaving rope LW is extended below the lower boom 16A from the leaving winch 50. Then, the operator connects the tip of the leaving rope LW to the outward wire connecting portion 95 of the working device 90.

In the present embodiment, as shown in FIG. 3, the lower boom 16A is attached to the upper swing body 12 and is in a substantially horizontal posture. On the other hand, the intermediate boom 16B is placed on the pedestal H arranged on the ground in front of the lower boom 16A.

In the leaving rope outbound towing process, the lower traveling body 91 of the working device 90 is moved from the lower boom 16A to the position where the upper boom 16E is arranged in a horizontal posture on the left side of the boom 16 while the leaving rope LW is extended by the leaving winch 50. By traveling on the ground, the tip of the leaving rope LW is towed from the lower boom 16A to the upper boom 16E.

In the present embodiment, the lower boom 16A shown in FIG. 3 is lifted by the auxiliary crane AC1, and the intermediate boom 16B is lifted by the auxiliary crane AC2. Then, the connectors K of the lower boom 16A and the intermediate boom 16B are connected to each other by connecting pins (not shown) extending in the left-right direction. The connector K has a pin hole for receiving a connecting pin. The working device 90 gradually moves forward as the boom 16 is assembled while towing the leaving wire LW. Therefore, while the lower boom 16A, the intermediate booms 16B, 16C, 16D and the upper boom 16E are connected to each other, the working device 90 temporarily stops on the ground and travels according to the length of the boom 16. As shown in FIG. 4, the boom 16 (lower boom 16A, intermediate boom 16B) is lifted by a guy link 32 extending from the tip of the mast 14 supported by the upper swing body 12 and a suspension cylinder (not shown). It may be.

Next, in the leaving rope wiring step, the operator removes the tip of the leaving rope LW from the outbound wire connecting portion 95 of the work device 90, and the second boom sheave 162 and the sheave block 361 (at least one) arranged on the upper boom 16E. Hang the leaving rope LW on the sheave). During this time, the working device 90 moves to a position on the right side of the upper boom 16E (arrow D2 in FIG. 2). In addition, in order to secure the feeding length of the leaving wire LW and make it easy to hang the leaving wire LW between the second boom sheave 162 and the sheave block 361, the working device 90 travels further forward than the upper boom 16E. May be good. Further, the leaving rope LW may be hung on at least one sheave.

Next, in the leaving rope return connection step, the operator attaches the tip of the leaving rope LW to the return wire connection portion 94S of the work device 90 in a state where the leaving rope LW is hung on the second boom sheave 162 and the sheave block 361. Connecting. At this time, the work attachment 94 of the work device 90 is temporarily laid down so that the tip of the leaving wire LW can be easily attached to the return wire connection portion 94S. Then, after the leaving wire LW is attached, the work attachment 94 (upper swing body 92) of the work device 90 is in a posture of turning 90 degrees with respect to the lower traveling body 91, as shown in FIG. As a result, the tip of the leaving wire LW attached to the return wire connecting portion 94S of the work attachment 94 is arranged directly above the upper surface portion of the boom 16. From the state of FIG. 5, the working device 90 moves rearward to the vicinity of the lower boom 16A and the upper swing body 12.

Then, in the rope connecting step, the operator on the upper swing body 12 removes the tip of the leaving rope LW from the return wire connecting portion 94S of the working device 90, and the tip of the main winding rope MW pulled out from the main winding winch 18. Connect the tip of the leaving rope LW to.

Further, in the main rope wiring process, the main winding winch 18 unwinds the main winding rope MW, while the leaving winch 50 winds up the leaving rope LW, so that the main winding rope MW moves from the lower boom 16A to the upper boom 16E by the leaving rope LW. After being guided to, it is automatically hung between the second boom sheave 162 and the sheave block 361. After that, the tip of the leaving wire LW and the tip of the main winding rope MW are separated, and the tip of the main winding rope MW is fixed at a predetermined position on the upper boom 16E. On the other hand, the leaving wire LW is wound up to the end by the leaving winch 50.

As described above, in the present embodiment, the leaving rope LW is connected to the outward wire connecting portion 95 or the returning wire connecting portion 94S of the working device 90 to run the lower traveling body 91, so that the lower traveling body 91 is fed from the leaving winch 50. The work of pulling the leaving rope LW from the lower boom 16A to the upper boom 16E and the work of pulling the leaving rope LW hung on at least one sheave from the upper boom 16E to the lower boom 16A can be performed on behalf of the operator. it can. Therefore, it is possible to reduce the burden on the operator in the rope wiring work of hanging the main winding rope MW drawn from the main winding winch 18 on at least one sheave of the upper boom 16E. Further, since the lower traveling body 91 of the work device 90 travels on the ground on the left or right side of the boom 16, even if the boom 16 is placed on the ground, the main winding rope MW is wired by traveling by the work device 90. Can be done efficiently.

Further, in the present embodiment, the winch mounting step is located inside the lower boom 16A at both ends in the left-right direction of the lower boom 16A, and is closer to the second boom sheave 162 in the left-right direction than at both ends. The position includes mounting the leaving winch 50 so that the winch drum can rotate about a rotation center axis extending in the left-right direction. Further, in the leaving rope outbound connection step, the leaving rope LW is extended below the lower boom 16A from the leaving winch 50, and of the lower surface portion of the lower boom 16A, the upper boom 16E side and the lower boom 16A of the lower boom 16A. The leaving rope LW was hung on the first guide sheave 52 which is arranged inside the left and right directions (preferably the central part in the left and right direction of the lower boom 16A) and is rotatable around the rotation center axis extending in the vertical direction. After that, the leaving rope LW is pulled out to the left side of the boom 16 and to the outside in the left-right direction of the boom 16. Then, the worker connects the tip of the leaving rope LW to the outward wire connecting portion 95 of the working device 90. Further, the leaving rope outbound towing step includes pulling the leaving rope LW drawn from the leaving winch 50 and passing through the first guide sheave 52 from the lower boom 16A to the upper boom 16E by the working device 90.

According to such a step, the leaving rope LW unwound from the leaving winch 50 rotating around the rotation center axis extending in the left-right direction is rotated around the rotation center axis extending in the vertical direction by the first guide sheave 52. It can be pulled out to the outside of the boom 16 in the left-right direction. Therefore, it is possible to easily connect the leaving rope LW to the working device 90 on the left side of the boom 16 while stably maintaining the feeding operation of the leaving winch 50, and the working device 90 connects the leaving wire LW to the lower boom 16A. Can be stably towed from to the upper boom 16E. When the leaving winch 50 rotates around a rotation center axis extending in the left-right direction, the position where the leaving wire LW is extended from the leaving winch 50 moves along the left-right direction on the winch drum of the leaving winch 50. Difficult to move along the vertical direction. Therefore, the tension of the leaving wire LW arranged so as to sandwich the boom 16 from above and below is unlikely to fluctuate even if the feeding position of the leaving winch 50 changes. On the other hand, in such a leaving winch 50, the leaving wire LW needs to be extended forward from the winch drum (in the direction from the lower boom 16A to the upper boom 16E). In the present embodiment, the leaving wire LW can be pulled out to the left and right outside of the boom 16 by the first guide sheave 52 while maintaining the feeding direction of the leaving wire LW by the leaving winch 50. As a result, the feeding operation of the leaving winch 50 is stably maintained as described above.

Further, in the present embodiment, in the leaving rope outbound connection step, the leaving rope LW is extended from the leaving winch 50 below the lower boom 16A and hung on the guide sheave 51 and the first guide sheave 52. Further, of the lower surface portion of the lower boom 16A, the upper boom 16E side of the first guide sheave 52 and the left end portion (first position) of the boom 16 are rotatably arranged around a rotation center axis extending in the vertical direction. After the leaving rope LW is hung on the second guide sheave 53, the tip of the leaving rope LW is connected to the outbound wire connecting portion 95 of the working device 90 arranged on the left side of the boom 16 on the ground. Further, in the leaving rope outbound towing step, the leaving rope LW delivered from the leaving winch 50 and passed through the guide sheave 51, the first guide sheave 52 and the second guide sheave 53 is moved from the lower boom 16A to the upper boom 16E by the working device 90. Towed.

According to such a step, the direction of the leaving rope LW pulled out to the outside in the left-right direction of the boom 16 via the first guide sheave 52 is changed toward the upper boom 16E by the second guide sheave 53. Can be done. Therefore, since the arrangement path of the leaving rope LW is stably maintained between the first guide sheave 52 and the second guide sheave 53, the feeding path of the leaving rope LW moves forward directly under the boom 16. While suppressing this, it is prevented that the leaving wire LW interferes with the member arranged on the lower surface portion of the boom 16. As a result, the feeding operation of the leaving winch 50 is stably maintained, and the working device 90 can stably pull the leaving rope LW from the lower boom 16A to the upper boom 16E on the left side of the boom 16.

Further, in the present embodiment, in the main rope wiring step, the operator sets the position of the second guide sheave 53 from the first position where the second guide sheave is arranged in the leaving rope outbound route connecting step to the lower boom. Of the lower surface portion of 16A, the lower boom 16A is changed to the inner side (second position, preferably the central portion in the left-right direction of the lower boom 16A) of both ends in the left-right direction, and the second guide sheave 53 Change the direction of the center of rotation from left-right to up-down. In other words, the operator moves the second guide sheave 53 arranged at the left end of the lower surface of the lower boom 16A to the center of the lower surface of the lower boom 16A in the left-right direction along the guide groove 601S. The second guide sheave 53 is attached to the boom 16 so as to be rotatable around the rotation center axis extending in the left-right direction. Then, in the main rope wiring step, the leaving rope LW is supported by the first guide sheave 52 and the second guide sheave 53 between the second boom sheave 162 and the sheave block 361 and the leaving winch 50. As a result, the winding force of the leaving winch 50 guides the leaving rope LW via the second boom sheave 162 and the sheave block 361 toward the first guide sheave 52 by the second guide sheave 53.

According to such a step, the second guide sheave 53 for guiding the leaving rope LW to the outside in the left-right direction of the boom 16 in the leaving rope outbound connection step, and the leaving rope LW as the first guide sheave in the main rope wiring step. It can be used as a sheave to guide towards 52. At this time, since both the first guide sheave 52 and the second guide sheave 53 are rotatably arranged around the center axis of rotation extending in the left-right direction near the center portion in the left-right direction of the boom 16, the leaving rope is viewed in a plan view. The LW can be guided linearly, the load on the leaving rope LW can be reduced, and the load on the second boom sheave 162 can also be reduced. More specifically, when winding the leaving rope LW with the leaving winch 50, if the leaving rope LW is separated laterally at each sheave, the rope tension is applied, so that the sheave resistance increases and the winding load increases. .. Further, since the leaving rope LW passes through the second boom sheave 162 arranged at the tip of the boom 16, the leaving rope LW is diagonally applied to the second boom sheave 162, and a load is similarly applied. On the other hand, in the above aspect, the load on the second boom sheave 162 can be reduced.

Further, in the present embodiment, as an undulating body, at least one intermediate boom is provided between the lower boom 16A and the upper boom 16E, and the lower boom 16A, the at least one intermediate boom and the upper boom 16E are connected to each other. The one in which the boom 16 is configured is prepared. Then, in the undulating body arrangement step, after the lower boom 16A is rotatably connected to the upper swing body 12, the at least one intermediate boom and the upper boom 16E are sequentially connected to the tip end side of the lower boom 16A. , The boom 16 is arranged in the horizontal position. Further, the undulating body arrangement step and the leaving rope so that the lower traveling body 91 of the working device 90 travels on the ground from the lower boom 16A toward the upper boom 16E on the left side of the boom 16 according to the length of the boom 16. The outbound traction process is performed in parallel.

According to such a step, the leaving rope outbound towing step can be performed in parallel with the work of assembling the boom 16.

Further, in the present embodiment, the lower traveling body 91 travels on the ground on one of the left side and the right side of the boom 16 in the leaving rope outward route towing step, and the lower traveling body 91 is boom 16 in the leaving rope return route towing process. Travel on the ground on either the left or right side of the.

According to such a step, the working device 90 prevents the working device 90 from stepping on the leaving rope LW routed to the ground on the outward route on the return route. Therefore, the leaving rope LW is prevented from being entangled or damaged.

Further, in the present embodiment, the crane 1 includes a first guide sheave 52 and a guide sheave unit 53S (both are guide sheave devices). The first guide sheave 52 and the guide sheave unit 53S include the upper swivel body 12, the lower boom 16A undulatingly mounted on the upper swivel body 12, and the opposite upper boom 16E, and are located horizontally from the upper swivel body 12. A boom 16 that can take a horizontal posture extending along the line, a main winding winch 18 that is attached to the lower boom 16A or the upper swing body 12 and can wind and unwind the main winding rope MW, and a lower boom 16A. It has a function of assisting the rope wiring of the crane 1 having a leaving winch 50 which is rotatably supported around a rotation center axis extending in the left-right direction and is capable of winding and feeding the leaving rope LW.

The first guide sheave 52 extends vertically to a position on the upper boom 16E side of the leaving winch 50 and inside both ends of the lower boom 16A in the left-right direction of the lower surface portion of the lower boom 16A in the horizontal posture. While supporting the leaving rope LW so as to be rotatably mounted around the center axis of rotation and to change the direction of the leaving rope LW extending from the leaving winch 50 toward the upper boom 16E toward the outside in the left-right direction of the boom 16. , Rotate so as to allow the traveling of the leaving rope LW.

The guide sheave unit 53S has a second guide sheave 53, a main frame 60, a guide plate 61, and a support unit 62 (sheave support portion). The second guide sheave 53 has an outer peripheral surface capable of supporting the leaving rope LW drawn out from the leaving winch 50 and passing through the first guide sheave 52. Further, the support unit 62 is attached to the boom 16 via the main frame 60 and the guide plate 61. The support unit 62 can be switched between a first support state that supports the second guide sheave 53 and a second support state that supports the second guide sheave 53 in a state different from the first support state. In the first support state, the second guide sheave 53 is extended from the leaving winch 50 and changes the direction of the leaving rope LW via the first guide sheave 52 toward the upper boom 16E on the outer side of the boom 16 in the left-right direction. The left end or right end of the lower surface of the lower boom 16A at a position closer to the upper boom 16E than the first guide sheave 52 of the lower boom 16A in the horizontal position so as to be possible. The support unit 62 supports the second guide sheave 53 so that the second guide sheave 53 can rotate about the rotation center axis extending along the vertical direction at the position of.

According to this configuration, when the main winding rope MW is wired in the crane 1, the leaving rope LW pulled out from the leaving winch 50 toward the upper boom 16E is set to the first guide sheave 52 and the first support state. It can be passed to the second guide sheave 53 in order. Therefore, the leaving rope LW can be towed to the upper boom 16E on the left and right outer sides of the boom 16 while stably maintaining the feeding operation of the leaving winch 50. Further, it is possible to prevent the feeding path of the leaving rope LW from moving forward immediately under the boom 16 and prevent the leaving rope LW from interfering with other members.

Further, in the present embodiment, in the second support state, the second guide sheave 53 can support the leaving rope LW together with the first guide sheave 52 between the upper boom 16E and the leaving winch 50. The position of the lower boom 16A in the horizontal posture on the upper boom 16E side of the first guide sheave 52 and the position inside the lower surface of the lower boom 16A in the left-right direction (preferably the lower part). The support unit 62 supports the second guide sheave 53 so that the second guide sheave 53 can rotate at the central portion in the left-right direction of the boom 16A). That is, the second guide sheave 53 is selectively mounted at the first guide position at the end in the left-right direction of the lower boom 16A and the second guide position at the substantially central portion in the left-right direction of the lower boom 16A.

According to this configuration, when winding the leaving rope LW by the leaving winch 50 while paying out the main winding rope MW by the main winding winch 18, the leaving rope LW from the upper boom 16E to the leaving winch 50 of the lower boom 16A is set. It can be guided along the lower surface portion of the boom 16 by the second guide sheave 53 and the first guide sheave 52 in the two-supported state. Therefore, the leaving rope LW is wound with a larger tension as compared with the case where the leaving rope LW is wound via the side of the boom 16 while the second guide sheave 53 is in the first support state. Is possible.

Further, in the present embodiment, the support unit 62 supports the second guide sheave 53 so as to be rotatable around a rotation center axis extending along the left-right direction in the second support state. ..

According to this configuration, when the leaving rope LW is wound by the leaving winch 50, the leaving rope LW is rotated with a larger tension than the case where the second guide sheave 53 rotates around the rotation center axis extending in the vertical direction. Can be wound up. In particular, when the leaving winch 50 winds up the leaving wire LW, tension is applied to the leaving wire LW and the main winding rope MW so as to sandwich the boom 16 from above and below. Therefore, the tension can be stably maintained by rotating the second guide sheave 53 around the rotation center axis extending in the left-right direction.

The rope wiring method and the guide sheave unit 53S of the work machine according to each embodiment of the present invention have been described above. The present invention is not limited to these forms. The present invention is capable of the following modified embodiments.

(1) In the above embodiment, the crane 1 has been used as the work machine, but the present invention is not limited thereto. The work machine according to the present invention may have other aspects such as a crusher and an excavator. Further, the work machine is not limited to the one having the lower traveling body 10 and the upper turning body 12, and may have other machines. Further, the undulating body is not limited to the boom 16, and may be another undulating body such as a jib or a mast.

(2) Further, in the above embodiment, as shown in FIG. 2, the working device 90 travels on the left side of the boom 16 to reach the upper boom 16E from the lower boom 16A, and the working device 90 moves on the right side of the boom 16. Although the embodiment from the upper boom 16E to the lower boom 16A by traveling has been described, the present invention is not limited to this. The working device 90 may travel on the right side of the boom 16 from the lower boom 16A to the upper boom 16E, and the working device 90 may travel on the left side of the boom 16 from the upper boom 16E to the lower boom 16A.

Further, in the leaving rope outward towing step and the leaving rope return towing step, the lower traveling body 91 of the working device 90 may travel on the ground on the same side of the left side and the right side of the boom 16.

According to such a process, since it is sufficient to secure one space on the left and right sides of the boom 16 as a traveling path of the work device 90, the space around the boom 16 can be effectively used for other work and a place for storing members. it can.

(3) Further, in the above embodiment, the working device 90 runs side by side from the lower boom 16A to the upper boom 16E while the lower boom 16A, the intermediate booms 16B, 16C, 16D and the upper boom 16E of the boom 16 are connected in order. However, the present invention is not limited to this.

That is, in the leaving rope outbound connection step, the leaving rope LW is attached to the lower boom 16A from the leaving winch 50 in a state where the entire boom 16 including the lower boom 16A and the upper boom 16E is attached to the upper swing body 12 in advance and is in a horizontal posture. The tip of the leaving rope LW may be connected to the outbound wire connecting portion 95 of the working device 90.

According to this configuration, the wiring work of the main winding rope MW can be performed in a short time by using the leaving rope LW and the leaving winch 50 with the entire boom 16 mounted on the upper swing body 12.

(4) Further, in the above embodiment, as shown in FIG. 6, the leaving rope LW is held and pulled by the outward wire connecting portion 95 arranged on the left side (side side) of the lower boom 16A (boom 16). Although described in aspects, the present invention is not limited thereto.

FIG. 14 is a rear view showing a state in which the leaving rope LW is connected to the working device 90A (work assisting device) in the wiring work of the main winding rope MW of the crane 1 according to the modified embodiment of the present invention. In FIG. 14, some members such as the car body 910, the crawler unit 911, and the crawler 912 are cross-sectioned. In this modified embodiment, the work device 90A includes a lower traveling body 91 (traveling portion) and a working attachment 94.

The lower traveling body 91 has a car body 910, a pair of left and right crawler units 911, and a pair of left and right crawlers 912.

The work attachment 94 has a first arm 941 and a second arm 942. The first arm 941 is supported by the lower traveling body 91 so as to be rotatable around the rotation shaft 94P extending in the front-rear direction. The second arm 942 is supported by the tip of the first arm 941 so as to be rotatable around a rotation shaft 94Q extending in the vertical direction. A wire holding portion 94R (first connecting portion) is arranged at the tip of the second arm 942. The wire holding portion 94R can grip the tip end portion of the leaving rope LW. In FIG. 14, the first arm 941 may be arranged so as to extend from the crawler unit 911.

According to such a working device 90A, in the winch mounting step in the previous embodiment, the lower boom 16A is located inside the lower boom 16A in the left-right direction and both ends in the left-right direction. The leaving winch 50 is mounted at a position closer to the second boom sheave 162 (preferably the central portion in the left-right direction of the lower boom 16A). Further, in the preparatory step, the wire holding portion 94R is relatively moved downward of the boom 16 with respect to the lower traveling body 91 of the working device 90 located on the left side or the right side of the boom 16. Further, in the leaving rope outbound connection step, the leaving rope LW is extended below the lower boom 16A from the leaving winch 50. Then, the lower surface portion of the lower boom 16A is closer to the upper boom 16E than the leaving winch 50, and the lower boom 16A is located inside the lower boom 16A in the left-right direction (preferably in the left-right direction of the lower boom 16A). The leaving rope LW is hung on the guide sheave 51 and the first guide sheave 52 arranged in the central portion of the above. Further, the tip of the leaving rope LW is connected to the wire holding portion 94R of the working device 90A. Further, in the leaving rope outbound traction step, the lower traveling body 91 moves from the lower boom 16A to the upper boom 16E on the left side or the right side of the boom 16 while the wire holding portion 94R holds the leaving rope LW below the boom 16. Run. The other steps are the same as those in the previous embodiment.

According to such a step, in the leaving rope outbound towing step, the leaving rope LW can be linearly guided below the boom 16 to reduce the load on the leaving rope LW, and the load on the tip side of the boom 16 can be reduced. The load on the 2 boom sheave 162 can also be reduced. Further, in the present modification embodiment, the second guide sheave 53 arranged horizontally in FIG. 3 becomes unnecessary, and the cost of the crane 1 and the resistance applied to each sheave can be reduced.

(5) Further, in the above embodiment, the working device 90 has been described in the embodiment of the hydraulic excavator, but the working device 90 may be another traveling body. A pin attachment / detachment unit capable of attaching / detaching a connecting pin may be attached to the tip of the work attachment 94 of the work device 90. In this case, as shown in FIGS. 3 and 4, the working device 90 may pull the leaving wire LW while performing the connecting work (pin insertion work) of each boom member. Further, in the return route shown in FIG. 5, the leaving wire LW may be towed while the guy link 32, which is divided and placed on the upper surface portion of the boom 16, is pin-connected by the pin attachment / detachment unit. That is, the working device 90 may have a function of pulling the leaving wire LW, a function of connecting the boom members of the boom 16 and a function of connecting the guy link 32.

(6) Further, when the tip of the leaving wire LW and the tip of the main winding rope MW are connected in the above-mentioned rope connecting step, the boom 16 is placed in an upright posture with respect to the upper swing body 12, and then the main A wiring step of the wound rope MW may be performed. Further, the leaving wire LW is towed in a state where each boom member constituting the boom 16 is placed on a pedestal H on the ground and is not connected to each other or a part of the connectors K are connected to each other. You may.

1 Crane 10 Lower traveling body 12 Upper turning body (airframe)
14 mast 16 boom (undulating body)
16A Lower boom 16A1 Main pipe 16B, 16C, 16D Intermediate boom 16E Upper boom 161 1st boom sheave 162 2nd boom sheave 18 Main winding winch (main winch)
20 Supplementary winding winch 22 Boom undulating winch 24, 26 Sheave 28 Boom undulating rope 30 Guy line 32 Guy link 36 Hook 361 Sheave block 50 Leaving winch 51 Guide sheave 52 First guide sheave (guide sheave device)
53 Second guide sheave 53S Guide sheave unit (guide sheave device)
60 Main frame 61 Guide plate 62 Support unit (sheave support)
90, 90A work equipment (work assistance equipment)
91 Lower running body (running part)
910 Car body 911 Crawler unit 912 Crawler 92 Upper swivel body 93 Cab 94 Work attachment 94P 1st fulcrum part 94Q 2nd fulcrum part 94R Wire holding part (1st connection part)
94S Return wire connection (second connection)
95 Outward wire connection (first connection)
951 Bracket 952 Hook AC1 Auxiliary Crane AC2 Auxiliary Crane H Pedestal K Connector LW Leaving Rope MW Main Winding Rope (Main Rope)

Claims (10)

An undulating body that includes the machine body, a undulating body base end portion that is undulatingly attached to the machine body, and a undulating body tip portion that is opposite to the undulating body, and that can take a horizontal posture extending from the machine body in the horizontal direction. In a work machine having a base end of a undulating body or a main winch attached to the machine body and capable of winding and feeding the main rope, the main rope unwound from the main winch is used as the tip of the undulating body. It is a rope wiring method for work machines to be hung on
A winch mounting step of mounting a leaving winch having a winch drum capable of winding and feeding the leaving rope on the base end of the undulating body by rotating,
A traveling portion capable of traveling on the ground, a first connecting portion capable of being connected to the tip end portion of the leaving rope, and the leaving rope arranged above the upper surface portion of the undulating body in a horizontal posture. A preparatory step for preparing a work assisting device having a second connecting portion that can be connected to the tip portion of the rope.
An undulating body arranging step including rotatably connecting the base end portion of the undulating body to the airframe and arranging the undulating body in the horizontal posture.
In the undulating body arrangement step, after at least the undulating body base end portion is connected to the machine body, the leaving rope is extended below the undulating body base end portion from the leaving winch, and the first of the work assisting devices. The leaving rope outbound connection step of connecting the tip of the leaving rope to the connecting portion,
While paying out the leaving rope by the leaving winch, the traveling portion of the work assist device is placed on the left side or the right side of the undulating body at a position where the undulating body tip portion is arranged in the horizontal posture from the undulating body base end portion. A leaving rope outbound traction step of pulling the tip of the leaving rope to the tip of the undulating body by traveling on the ground toward the ground.
A leaving rope wiring step of removing the tip of the leaving rope from the first connection portion of the work assist device and hanging the leaving rope on at least one sheave arranged at the tip of the undulating body.
A leaving rope return path connecting step of connecting the tip end portion of the leaving rope to the second connection portion of the work assist device while the leaving rope is hung on at least one sheave.
The traveling of the work assisting device so that the tip end portion of the leaving rope connected to the second connecting portion moves above the upper surface portion of the undulating body while further extending the leaving rope by the leaving winch. By running the portion on the left side or the right side of the undulating body from the tip of the undulating body toward the base end of the undulating body, the tip of the leaving rope is moved from the tip of the undulating body to at least the undulating body. Leaving rope return towing process to pull to the base end and
A rope connecting step of removing the tip of the leaving rope from the second connecting portion of the work assist device and connecting the tip of the leaving rope to the tip of the main rope pulled out from the main winch.
By winding the leaving rope with the leaving winch while paying out the main rope with the main winch, the main rope is guided from the base end portion of the undulating body to the tip end portion of the undulating body by the leaving rope, and then at least the above. The main rope wiring process to hang on one sheave,
A method of rope wiring for work machines. In the winch mounting step, the winch mounting step is performed at a position inside the undulating body base end portion in the left-right direction and closer to the sheave in the left-right direction than the both ends. Including mounting the leaving winch so that the winch drum can rotate around the central axis of rotation extending in the left-right direction.
In the leaving rope outbound connection step, the leaving rope is extended below the base end of the undulating body from the leaving winch, and the lower surface of the base end of the undulating body is closer to the tip of the undulating winch than the leaving winch. After hanging the leaving rope on the first guide sheave that is arranged inside the base end of the undulating body in the left-right direction and can rotate around the rotation center axis extending in the vertical direction, the left side of the undulating body and Including pulling out the leaving rope to the outside of the undulating body on the right side where the work assist device is arranged and connecting the tip end portion of the leaving rope to the first connection portion of the work assistance device. ,
The work according to claim 1, wherein the leaving rope outbound traction step includes pulling the leaving rope from the leaving winch and via the first guide sheave to the tip of the undulating body by the work assisting device. How to wire the rope of a machine. In the leaving rope outbound connection step, the leaving rope is extended below the undulating body base end portion from the leaving winch, the leaving rope is hung on the first guide sheave, and further, the lower surface portion of the undulating body base end portion. Of the above, in the vertical direction at the first position of the end of the undulating body on the side of the tip of the undulating body and on the left and right sides of the undulating body with respect to the first guide sheave on which the work assist device is arranged. After hanging the leaving rope on the second guide sheave rotatably arranged around the rotation center axis extending to the above, the tip of the leaving rope is connected to the first connecting portion of the work assist device.
The step of pulling the outbound rope of the leaving rope includes pulling the leaving rope delivered from the leaving winch and passing through the first guide sheave and the second guide sheave to the tip of the undulating body by the work assisting device. Item 2. The rope wiring method for a work machine according to Item 2. The main rope wiring step is
The position of the second guide sheave is arranged in the leaving rope outbound connection step. From the first position where the second guide sheave is arranged, the left-right direction of the undulating body base end portion of the lower surface portion of the undulating body base end portion. To change the direction of the rotation center axis of the second guide sheave from the left-right direction to the up-down direction while changing to the second position inside the both ends of the
Supporting the leaving rope between the plurality of sheaves and the leaving winch by the first guide sheave and the second guide sheave.
3. The rope wiring method for a work machine according to claim 3. In the winch mounting step, the leaving is located inside the undulating body base end portion in the left-right direction and closer to the sheave than both ends in the left-right direction. Including wearing a winch
The preparatory step includes moving the first connection portion downward of the boom with respect to the traveling portion of the work assist device located on the left side or the right side of the boom.
In the leaving rope outbound connection step, the leaving rope is extended below the base end of the undulating body from the leaving winch, and the lower surface of the base end of the undulating body is closer to the tip of the undulating winch than the leaving winch. After the leaving rope is hung on the first guide sheaves arranged at positions inside the left and right ends of the undulating body base end portion in the undulating body base end portion, the leaving is applied to the first connecting portion. Including connecting the tip of the rope
The leaving rope outbound traction step includes running the traveling portion on the left or right side of the undulating body while holding the leaving rope below the boom by the first connecting portion.
The rope wiring method for a work machine according to claim 1. As the undulating body, at least one undulating body intermediate portion is provided between the undulating body base end portion and the undulating body tip portion, and the undulating body base end portion, the at least one undulating body intermediate portion, and the undulating body. Further prepared to prepare a structure in which the undulating body is formed by connecting the tips to each other.
In the undulating body arrangement step, after the undulating body base end portion is rotatably connected to the machine body, at least one undulating body intermediate portion and the undulating body tip portion are placed on the tip end side of the undulating body base end portion. By connecting in order, including arranging the undulating body in the horizontal posture,
A claim that the undulating body arranging step and the leaving rope outbound traction step are performed in parallel so that the traveling portion of the work assisting device travels according to the length of the undulating body in the undulating body arranging step. Item 8. The rope wiring method for a work machine according to any one of Items 1 to 5. In the leaving rope outbound traction step, the traveling portion is made to travel on the ground on one of the left and right sides of the boom, and in the leaving rope return traction step, the traveling portion is ground on the other of the left and right sides of the boom. The rope wiring method for a work machine according to any one of claims 1 to 6, further comprising running the rope. An undulating body that includes the machine body, a undulating body base end portion that is undulatingly attached to the machine body, and a undulating body tip portion that is opposite to the undulating body, and that can take a horizontal posture extending from the machine body in the horizontal direction. A main winch that is attached to the base end of the undulating body or can be mounted on the machine body to wind and unwind the main rope, and a leaving that is rotatably supported around the center axis of rotation extending in the left-right direction at the base end of the undulating body. In a work machine having a leaving winch capable of winding and feeding the rope, a guide sheave that assists the rope wiring work in which the main rope unwound from the main winch is hung on the tip of the undulating body. It ’s a device,
Of the lower surface of the base end of the undulating body in the horizontal posture, the lower surface of the base end of the undulating body is located on the tip side of the undulating winch and inside of both ends of the base end of the undulating body in the vertical direction. The leaving rope is rotatably mounted around the extending center axis of rotation, and the direction of the leaving rope that is extended from the leaving winch toward the tip of the undulating body is changed toward the outside in the left-right direction of the undulating body. The first guide sheave that rotates to allow the traveling of the leaving rope while supporting the
A second guide sheave capable of supporting the leaving rope that is fed out from the leaving winch and passed through the first guide sheave.
A sheave support portion capable of supporting the second guide sheave in the first support state,
With
In the first support state, the sheave support portion is such that the second guide sheave is extended from the leaving winch and the direction of the leaving rope via the first guide sheave is outside the left-right direction of the undulating body. The position of the base end of the undulating body in the horizontal posture is closer to the tip of the undulating body than the first guide sheave so that the tip of the undulating body can be changed. The second guide sheave is provided so as to be rotatable around a rotation center axis extending along the vertical direction at the position of the left end portion or the right end portion of the lower surface portion of the base end portion of the undulating body. A guide sheave device to support. The sheave support portion can be switched between the first support state and the second support state that supports the second guide sheave in a state different from the first support state.
In the second support state, the sheave support portion allows the second guide sheave to support the leaving rope together with the first guide sheave between the tip of the undulating body and the leaving winch. , Both ends in the left-right direction of the lower surface portion of the undulating body base end portion at a position closer to the undulating body tip portion side than the first guide sheave of the undulating body base end portions in the horizontal posture. The guide sheave device according to claim 8, which supports the second guide sheave so that the second guide sheave can rotate at a position inside the guide sheave. According to claim 9, the sheave support portion supports the second guide sheave so that the second guide sheave can rotate around a rotation center axis extending in the left-right direction in the second support state. The guide sheave device described.

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