JP2017197316A - Assembling method of construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an assembling method of a construction machine which can move a middle sheave to a transportation position behind a superstructure and a connection position in front of the superstructure without requiring a separate crane or the like.SOLUTION: An assembling method of a construction machine includes in this order: a step of, when connecting a middle sheave and a pendant rope after connecting a telescopic boom to a superstructure, connecting the middle sheave at a transportation position and the pendant rope disposed at a base part of the telescopic boom with an auxiliary rope; a step of unwinding a derricking wire while extending the telescopic boom to move the middle sheave from the transportation position to a connection position on the telescopic boom; a step of removing the auxiliary rope; a step of shortening the telescopic boom to move a connection tool of the pendant rope to a position connecting to a connection part of the middle sheave; and a step of connecting the connection tool of the pendant rope and the connection part of the middle sheave.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for assembling a construction machine, and more particularly to a method for assembling a construction machine in which an upper swing body is provided with a telescopic boom that undulates with an undulation wire.

  Construction machines such as large crawler cranes and earth drills have a boom detachably attached to the upper swing body of a base machine consisting of a lower traveling body and an upper swing body. They are transported separately from the machine. When attaching and detaching the boom before and after transportation, it is usually performed by attaching and detaching a foot pin that connects the boom foot and the boom bracket of the upper-part turning body while the heavy boom is held by a large crane. In addition, as a method of attaching and detaching the telescopic boom to and from the upper swing body, there is known a method in which the telescopic boom can be attached to and detached from the upper swing body without using a large crane by using a specific boom support (for example, , See Patent Document 1).

JP2015-124491A

  When detaching the telescopic boom from the upper swing body, when connecting the middle sheave provided at the tip of the undulation wire fed out through the gantry behind the upper swing body and the pendant rope provided on the telescopic boom It is necessary to move the middle sheave to the transport position behind the upper swing body and the connecting position in front of the upper swing body. However, in the case of a large crane or an earth drill, there is a problem that a separate crane or the like is required to move the heavy middle sheave.

  Therefore, the present invention provides a construction machine assembling method capable of moving the middle sheave between the transport position behind the upper swing body and the connecting position in front of the upper swing body without requiring another crane or the like. It is an object.

  In order to achieve the above object, a construction machine assembly method according to the present invention provides a hoisting wire for extending an extendable boom that is mounted on an upper swing body of a base machine in a construction machine so as to be raised and lowered via a gantry behind the upper swing body. In a method for assembling a construction machine that undulates with a pendant rope that is detachably connected to a middle sheave provided in the vehicle, after a telescopic boom in a shortened state is movably connected to the upper revolving structure, the transportation on the upper revolving structure When connecting the middle sheave arranged at the position and the pendant rope attached to the telescopic boom, connecting the middle sheave at the transport position and the pendant rope arranged on the telescopic boom with an auxiliary rope; Unwinding the undulation wire while extending the telescopic boom, and retracting the middle sheave from the transport position Moving to a connecting position on the web, removing the auxiliary rope, shortening the telescopic boom and moving the pendant rope connector to a position to connect the middle sheave connector, The step of connecting the connecting tool and the connecting portion of the middle sheave is performed in order.

  According to the construction method of the construction machine of the present invention, the middle sheave, which is a heavy object, is moved from the transport position to the connection position by using the auxiliary rope and using the expansion and contraction of the telescopic boom and the unwinding of the undulation wire. The middle sheave can be moved from the transport position to the connection position without using a crane or the like. Moreover, by performing each step in reverse, the middle sheave separated from the pendant rope can be moved from the connection position to the transport position.

FIG. 7 is a side view showing a preparation stage for mounting the telescopic boom to the upper swing body according to an embodiment of the construction method of the construction machine of the present invention. It is a side view showing the stage where the telescopic boom was similarly attached to the upper swing body. It is a side view which shows the step which similarly raised the gantry of the upper revolving body. It is a side view which shows the step which connected the middle sheave in a transportation position similarly, and the pendant rope arrange | positioned at the base of an expansion-contraction boom with the auxiliary rope. It is a side view which similarly shows the step which moved the middle sheave from the transport position to the connection position. It is a side view which similarly shows the step which removed the auxiliary rope. Similarly, it is a side view showing a stage in which the telescopic boom is shortened and the pendant rope connector is moved to the connecting position with the middle sheave connecting portion to connect the pendant rope connecting device and the middle sheave connecting portion with the connecting member. It is a side view which shows the working state of the construction machine which wound up the hoisting wire and stood the telescopic boom.

  1 to 8 show an embodiment in which the present invention is applied to a large earth drill which is one of construction machines. As shown in FIG. 8, the earth drill 11 shown in this embodiment includes a base machine 14 in which an upper swing body 13 is pivotably provided on an upper part of a lower traveling body 12 provided with a crawler, and a front of the upper swing body 13. Telescopic boom 15 that can be raised and lowered at the top, and a kelly bar that is rotatably suspended via a swivel 18 on a main wire 17 that is suspended from a top sheave block 16 that is attached to the tip of the telescopic boom 15. 19, a kelly bar rotation drive device 22 supported by the front frame 20 and the cylinders 21a and 21b from the lower part of the telescopic boom 15, a back stopper 23 provided on the rear side of the telescopic boom 15, and a lower end part of the kelly bar 19 The excavation bucket and the bottom expansion bucket 24 attached to the are provided.

  The upper end of the second stage of the telescopic boom 15 is connected to the upper end of the pendant rope 25, and the lower end of the pendant rope 25 is provided with a connector 25 a to which the connecting part 26 a of the middle sheave 26 is detachably connected. It has been. The middle sheave 26 is wound with a undulation wire 27 unwound from a undulation winch installed on the upper swing body 13 via a gantry 28. Further, a sub-wire 29 for lifting the member is wound around the top sheave block 16.

  The vertical hole is formed by the ground drill 11 by operating the hoisting wire 27 with a hoisting winch to raise the telescopic boom 15 to a predetermined angle and with the keriba rotary driving device 22 arranged at a predetermined position. The process of pushing the excavation bucket or the bottom expansion bucket 24 into the ground while rotating the kelly bar 19 and excavating the earth, and the earth and sand excavated by pulling up the excavation bucket or the bottom expansion bucket 24 with the main wire 17 are the excavation bucket or the bottom expansion bucket 24. And the step of discharging from the substrate are alternately repeated.

  When such an earth drill 11 is transported, it is disassembled into a plurality according to the weight and size and loaded on a plurality of transport vehicles such as trailers. The telescopic boom 15, which is a heavy object, is removed from the upper swing body 13 in a shortened state, and the main / sub wires 17, 29, hydraulic pipes, and the like are removed, and the boom support device 31 is placed on the trailer platform. It is loaded and transported. The boom support device 31 is provided with telescopic booms 33 at the four corners of a rectangular base frame 32, and with fixing portions 34a and 34b for fixing the telescopic boom 15 at appropriate positions on the base frame 32. ing.

  As shown in FIG. 1, when the telescopic boom 15 is transported by the boom support device 31, the boom foot 15 a provided at the base end of the telescopic boom 15 is made to protrude rearward from the boom support device 31. Further, the front frame 20 and the cylinders 21a and 21b separated from the Keriba rotation drive device 22 are fixed to the boom support device 31 by appropriate fixing portions 34a and 34b, and the back stopper 23 separated from the upper swing body 13 is an extendable boom. It is fixed at 15 predetermined positions.

  Further, the pendant rope 25 removed from the middle sheave 26 is in a state in which the connector 25 a is fixed to the upper surface of the telescopic boom 15. On the other hand, in the upper swing body 13, the gantry 28 is folded and fixed by the fixing rod 28a, and the middle sheave 26 is fixed to the middle sheave fixing portion 35 provided at the base end portion of the front leg of the gantry 28 via a fixing member such as a pin. The state is fixed on the upper swing body 13.

  When the telescopic boom 15 is connected to the upper swing body 13 after transportation, the base machine 14 is moved to the connection position with the telescopic boom 15 to connect the hydraulic circuit of the upper swing body 13 and the hydraulic circuit of the boom support device 31. The cylinder of the telescopic boom 33 is operated with the hydraulic hose 36 connected, and the boom support device 31 that supports the telescopic boom 15 is lowered from the trailer bed. A bracket provided on the boom foot 15a and the upper swing body 13 by adjusting the front and rear positions by the travel operation of the lower travel body 12, the left and right positions by the swing operation of the upper swing body 13, and the vertical position by the cylinder expansion and contraction operation of the telescopic boom 33, respectively. 13a is connected to the undulating state by a connecting pin. Further, as shown in FIG. 2, the tip of the back stopper 23 is connected to the upper swing body 13.

  Next, as shown in FIG. 3, after the gantry 28 is erected, as shown in FIG. 4, the connecting portion 26a of the middle sheave 26 fixed to the middle sheave fixing portion 35 and disposed at the transport position, and the telescopic boom The auxiliary rope 37 connects the connecting tool 25 a of the pendant rope 25 arranged at the base of the upper surface 15. A hydraulic pipe (not shown) for operating the telescopic boom is also connected.

  Then, as shown in FIG. 5, while the telescopic boom 15 is extended, the hoisting winch is operated to unwind the hoisting wire 27, and the connection on the connecting support 15 b provided on the upper surface of the base of the telescopic boom 15 is performed. The middle sheave 26 is moved to the position. At this time, by performing the extension operation of the telescopic boom 15 and the unwinding operation of the hoisting wire 27 by the hoisting winch, the middle sheave 26 can be reliably moved to the connecting position, and the middle sheave 26 falls. Such an accident can be prevented.

  Next, as shown in FIG. 6, after removing the auxiliary rope 37 from between the middle sheave 26 and the pendant rope 25, the telescopic boom 15 is shortened so that the connecting tool 25 a of the pendant rope 25 is connected to the connecting portion 26 a of the middle sheave 26. Move to a connectable position. Finally, as shown in FIG. 7, the connecting wire 25 and the telescopic boom 15 are connected to the middle sheave 26 and the pendant rope 25 by connecting the connecting tool 25 a of the pendant rope 25 and the connecting portion 26 a of the middle sheave 26 with a connecting pin. It can be made the state connected via.

  Finally, after attaching the main and sub wires 17, 29, hydraulic piping, etc., releasing the fixed state between the boom support device 31 and the telescopic boom 15, the hoisting wire 27 is wound up by a hoisting winch, whereby the telescopic boom 15 is removed. Can stand. Further, the earth drill 11 can be brought into the working state shown in FIG. 8 by attaching the Keriba rotary drive device 22 and the like using the main wire 17 and the sub wire 29 and attaching the front frame 20 and the cylinders 21a and 21b. it can.

  The middle sheave 26 may be moved to the transport position when the earth drill 11 is in the transport state by reversing the assembly procedure. That is, the kelly bar rotation driving device 22 and the wires 17 and 29 are removed, the hoisting wire 27 is unwound, the shortened telescopic boom 15 is tilted and supported by the boom support device 31, and then the hoisting wire 27 is further unwound. Thus, the middle sheave 26 is lowered to the connecting support portion 15b. Next, the connection between the middle sheave 26 and the pendant rope 25 is released, the telescopic boom 15 is extended by an appropriate amount, and then the middle sheave 26 and the pendant rope 25 are connected with the auxiliary rope 37.

  The middle sheave 26 can be moved from the connecting position on the telescopic boom 15 to the transport position on the upper swing body 13 by shortening the telescopic boom 15 while winding the hoisting wire 27. Thereafter, after the auxiliary rope 37 is removed and the middle sheave 26 and the pendant rope 25 are fixed at predetermined positions, the telescopic boom 33 of the boom support device 31 is operated to remove the telescopic boom 15 from the upper swing body 13.

  In this manner, the middle sheave 26 and the pendant rope 25 can be connected and released together with the attachment / detachment of the telescopic boom 15 to / from the upper swing body 13 safely and easily without requiring another crane or the like. .

  In addition, this invention is applicable not only to the said earth drill but to various construction machines provided with the structure which raises / lowers an expansion-contraction boom with a raising / lowering wire.

  DESCRIPTION OF SYMBOLS 11 ... Earth drill, 12 ... Lower traveling body, 13 ... Upper turning body, 13a ... Bracket, 14 ... Base machine, 15 ... Telescopic boom, 15a ... Boom foot, 15b ... Connection support part, 16 ... Top sheave block, 17 ... Main wire, 18 ... Swivel, 19 ... Keriba, 20 ... Front frame, 21a, 21b ... Cylinder, 22 ... Keriba rotary drive device, 23 ... Back stopper, 24 ... Bottom bottom bucket, 25 ... Pendant rope, 25a ... Connector, 26 DESCRIPTION OF SYMBOLS ... Middle sheave, 26a ... Connection part, 27 ... Unraveling wire, 28 ... Gantry, 28a ... Fixed rod, 29 ... Sub wire, 31 ... Boom support device, 32 ... Base frame, 33 ... Telescopic boom, 34a, 34b ... Fixed part, 35 ... Middle sheave fixing part, 36 ... Hydraulic hose, 37 ... Auxiliary rope

Claims (1)

  The telescopic boom mounted on the upper swing body of the base machine in a construction machine can be raised and lowered by a pendant rope removably connected to the middle sheave provided on the hoisting wire that is fed out through the gantry behind the upper swing body. In a method for assembling a construction machine, a middle sheave arranged at a transport position on the upper swing body after a telescopic boom in a shortened state is connected to the upper swing body so as to be raised and lowered, and a pendant attached to the telescopic boom When connecting the rope, the middle sheave in the transport position and the pendant rope placed on the telescopic boom are connected with an auxiliary rope, and the middle sheave is transported by unwinding the undulating wire while extending the telescopic boom. Moving from a position to a connecting position on the telescopic boom, and the auxiliary rope The step of removing, the step of shortening the telescopic boom and moving the pendant rope connector to the position where the middle sheave connector is connected, and the step of connecting the pendant rope connector and the middle sheave connector are sequentially performed. A method for assembling a construction machine.

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