JP6509016B2 - Boom mounting device - Google Patents

Description

The present invention relates to a boom detachable equipment, particularly, it relates to the boom detachable equipment to be used for detaching the large crawler cranes and earth drill boom on the upper swing structure.

  Large crawler cranes and earth drills have a boom removably attached to the upper revolving unit of a base machine consisting of a lower traveling unit and an upper revolving unit, and during transportation, the boom is removed from the upper revolving unit and the base machine I am trying to transport separately. When attaching and detaching the boom before and after transportation, it is usually carried out by attaching and detaching the foot pin connecting the boom foot and the boom bracket of the upper swing body while holding the heavy boom with a large crane (for example, Patent Document 1).

JP-A-7-101675

  However, when attaching and removing the boom by holding the boom with a large crane, it requires a large space for arranging a base machine, a transport trailer and a large crane for lifting the boom, and the operation of the crane for lifting the boom is also troublesome. The safety of the foot pin has to be removed and attached.

  Therefore, an object of the present invention is to provide a boom attaching / detaching device and an attaching / detaching method capable of easily attaching / detaching the boom to / from the upper swing body without requiring a crane for lifting the boom.

  In order to achieve the above object, the boom attaching / detaching device of the present invention is inserted into a pin insertion hole respectively formed in a boom bracket provided on an upper revolving body of a base machine in a construction machine and a boom foot on the base end side of the boom. A boom attaching / detaching device for attaching / detaching a boom to be attached to an upper swingable body via a foot pin, wherein the rear side supports the proximal side of a center of gravity of the boom at a rear side of a carrier of a transport vehicle transporting the boom. The rear support means includes a support means and a front support means for supporting the tip side of the center of gravity of the boom on the front side of the bed, and the rear support means includes a pair of left and right guide rails provided on the rear side of the bed. And the pair of left and right jacks guided by the guide rail and movable in the front-rear direction, and both ends supported by the left and right jacks so that they can move up and down And a movable support member provided so as to be movable in the front and rear direction together with the jack, and a pair of left and right cylinders for moving the respective jacks in the front and rear direction, and the front support means is a front provided on the front side of the bed A part-side support member, and a roller provided on the tip end side of the boom and rolling on the front-side support member in the front-rear direction are provided.

  Furthermore, the boom attaching and detaching apparatus according to the present invention is characterized in that the construction machine is an earth drill and the boom is a telescopic boom in which the boom is undulated by an undulating wire.

According to the boom detachable equipment of the present invention, a boom attached to and detached from the upper rotating body can be performed easily and safely without the need for a crane for lifting the boom, that removing or inserting a boom even in a narrow work site It becomes possible.

It is a side view showing one example of form which loaded a telescopic boom on a loading platform of a trailer using a boom attaching and detaching device of the present invention. It is a top view which shows the state of the boom on a loading platform. It is a front view which similarly shows the part of a back support means. It is a side view showing a back support means. It is also a plan view. It is a front view which shows the jack and movable support member in a back support means. It is also a plan view. It is a front view of the principal part similarly. It is a side view of the principal part similarly. It is a cross-sectional top view of the principal part similarly. It is an explanatory view showing the 1st step of attaching a boom to a revolving super structure. It is explanatory drawing which similarly shows a 2nd step. It is explanatory drawing which similarly shows a 3rd step. It is explanatory drawing which similarly shows a 4th step. It is explanatory drawing which similarly shows a 5th step. It is a side view which shows an example of the earth drill in a working state.

  FIGS. 1 to 16 show an embodiment in which the present invention is applied to a large earth drill which is one of construction machines. The earth drill 11 shown in this embodiment is provided with a base machine 14 in which an upper swing body 13 is rotatably provided on an upper portion of a lower traveling body 12 having a crawler, and can be undulated in a front portion of the upper swing body 13 Telescopic telescopic boom 15, a kelly bar 18 rotatably supported via a swivel 17 on a main wire 16 hanging down from a top sheave block 15a mounted on the tip of the telescopic boom 15, and the telescopic boom 15 The kelly bar rotation drive device 21 supported by the front frame 19 and the frame cylinder 20 from the lower part of the lower part, and the digging bucket and the bottom bucket 22 attached to the lower end of the kelly bar 18 are provided. An undulating wire 24 wound around the gantry 13a is connected to the top of the second stage of the telescopic boom 15 via a pendant rope 23, and a sub wire 25 for lifting a member is hung on the top sheave block 15a. It has been turned. Furthermore, a plurality of hydraulic pipes 26 for operating the kelly bar rotary drive unit 21, the digging bucket, the bottomed bucket 22 and the like are provided along the front frame 19 (see FIG. 15).

  The formation of the vertical hole by the earth drill 11 operates the undulation wire 24 with a winch to raise the telescopic boom 15 to a predetermined angle, and with the kelly bar rotation drive device 21 disposed at the predetermined position, the kelly bar rotation drive device 21 The process of pushing and digging into the ground while rotating the digging bucket and bottomed bucket 22 by turning 18 and excavating it, and alternately repeating the step of pulling up the digging bucket and bottomed bucket 22 and discharging excavated earth and sand It will be.

  When transporting such an earth drill 11, it is disassembled into a plurality of pieces depending on the weight and size, and loaded onto a plurality of transport vehicles such as trailers. The telescopic boom 15, which is a heavy load, is a loading platform of a trailer (flat trailer) 27 whose loading platform is flat as shown in FIG. 1 with the wires 16, 23, 24, 25 and the hydraulic piping 26 removed. Loaded on 28 and transported.

  A boom attaching and detaching device used when attaching and detaching the telescopic boom 15 to and from the upper swing body 13 is provided in advance on the loading platform 28 on which the telescopic boom 15 is loaded. The boom attaching / detaching device comprises: a rear support means 31 supporting the base end side of the telescopic boom 15 on the rear side of the carrier with respect to the center of gravity of the telescopic boom 15; And support means 32.

  The rear support means 31 is provided so as to be movable in the front and rear direction while being guided by the pair of left and right guide rails 33, 33 provided in the front and rear direction on the rear side both side upper surface of the loading platform 28 and the guide rails 33, 33. A pair of left and right jacks 34 and 34, a movable supporting member 35 supported on the left and right jacks 34 and 34 so as to be movable up and down together with the jacks 34 and 34, and the jacks A pair of left and right cylinders 36, 36 provided on the front side of 34, 34 respectively for moving the jacks 34, 34 in the front-rear direction are provided.

  At both end portions of the movable support member 35, covering members 37 for covering the upper end portions of the respective jacks 34, 34 are respectively provided. A suspension fitting 37a is provided on the upper surface of the top plate of each cover member 37, and a reinforcing plate 37b is provided on the lower surface of the top plate, against which a jack plate 34a provided on the upper end of the rod of the jack 34 abuts. The lower portion of the guide plate 37a is provided with a guide projection 37c slidably engaged with the recess 34b of the jack plate 34a, and the lower end of the guide projection 37c is a locking member 37d engaged with the lower surface of the jack plate 34a. Is provided.

  The rear support means 31 lifts the movable support member 35 and the jack 34 together by the engagement of the locking member 37d with the lower surface of the jack plate 34a when the suspension fitting 37a of the cover member 37 is lifted. Can be transported. Further, in a state in which the jack 34 is shortened, the jack plate 34a, the reinforcing plate 37b and the locking member 37d are formed so as not to be in contact with each other.

  On the other hand, the front support means 32 is a plate-like front side support member 39 provided on the upper front side of the loading platform 28 and a front side support member 39 rotatably attached to the tip of the front frame 19. And a roller 40 rolling on the upper surface of the roller.

  When the telescopic boom 15 is transported using the boom attachment / detachment device formed in this way and attached to or detached from the upper swing body 13, the front side support members of the rear support means 31 and the front support means 32 on the loading platform 28 in advance. Wear 39.

  As shown in FIG. 1, the telescopic boom 15 loaded on the loading platform 28 has the boom foot 15b protruding from the boom base end directed rearward of the loading platform 28 and the top sheave block 15a of the boom tip directed forward. The jack 34 is moved to the front end of the guide rail 33 so that the boom foot 15b does not protrude from the rear end of the loading platform 28, and the roller 40 is moved to the front end of the front support member 39 There is.

  The telescopic boom 15 is supported on the movable support member 35 by a fixed portion 38 connected to the boom support member 41 having a box structure at the base end side with respect to the center of gravity position of the longitudinal middle portion By installing the snap ring 42, it is fixed to the loading platform 28 via the rear support means 31 and the front support means 32. Further, as described above, since the cover member 37 and the jack plate 34a are not in contact with each other, vibration during transportation does not act on the jack 34, and the jack 34 can be protected.

  When attaching the telescopic boom 15 to the upper revolving superstructure 13, as shown in FIG. 11 as a first step, with the loading platform 28 disposed in front of the base machine 14, the ringing 42 is removed, and then the cylinder 36 is removed. To move the jack 34 and the movable support member 35 rearward, and project the boom foot 15b to the rear of the loading platform 28. The protrusion amount of the boom foot 15b is set so that the base machine 14 and the trailer 27 do not contact when the telescopic boom 15 is attached to the upper swing body 13, and based on this, the front and back of the jack 34 and the movable support member 35 are set. The amount of direction movement and the stroke of the cylinder 36 are set.

  The hydraulic pressure from the base machine 14 can be used to extend and retract the cylinders 36, and the left and right cylinders 36 are connected via the jacks 34 and the movable support members 35 guided by the guide rails 33. Can be tuned. Further, since the recess 34b of the jack plate 34a and the guide projection 37c of the cover member 37 are engaged with each other, the movable support member 35 can be simultaneously moved by moving the jack 34 with the cylinder 36.

  Next, as a second step, as shown in FIG. 12, the base machine 14 and the trailer 27 are moved to make the boom bracket 13b and the boom foot 15b approach each other. In this state, the base machine 14 and the trailer 27 are appropriately moved, and the upper swing body 13 is appropriately turned to align the boom bracket 13b and the boom foot 15b in the front-rear direction and the left-right direction, and operate the jack 34. Then, the movable support member 35 is raised, and the pin insertion holes 13c of the boom bracket 13b and the pin insertion holes 15c of the boom foot 15b are adjusted to the same height.

  At the next third stage, as shown in FIG. 13, the base machine 14 and the trailer 27 are moved at a low speed, and the boom bracket 13b and the boom foot 15b are combined while the height direction is finely adjusted with the jacks 34. Position alignment of the pin insertion holes 13 c and 15 c is performed, a foot pin (not shown) is inserted, and the telescopic boom 15 is attached to the upper swing body 13. At this time, since the jacks 34 are independent in the left and right, the inclination in the left and right direction can also be corrected.

  Then, in the fourth stage, as shown in FIG. 14, the boom stopper 43 is attached between the upper swing body 13 and the telescopic boom 15, and the telescopic boom 15 is held by the upper swing body 13, while the pendant rope 23 and the relief Set the wire 24. When the boom stopper 43 is attached, the boom stopper 43 can be lifted using a small-sized device commonly used at a construction site such as a truck crane or a power shovel.

  In the final fifth stage, as shown in FIG. 15, the gantry 13a on which the undulation wire 24 is wound is raised, and the telescopic boom 15 is firmly held by the undulation wire 24 with the undulation wire 24 in a stretched state, After removing the support member 41, the jack 34 is shortened to lower the movable support member 35, and the support of the telescopic boom 15 by the movable support member 35 is released. As a result, since the telescopic boom 15 loaded on the loading platform 28 of the trailer 27 is attached to the upper swing body 13, the loading state of the telescopic boom 15 by the trailer 27 ends, and the trailer 27 can freely travel. become.

  Furthermore, a hydraulic hose connected to each wire 16, 23, 24, 25 and the hydraulic piping 26 is attached to a predetermined position of the telescopic boom 15, the boom stopper 43 is removed, and the roller 40 is removed from the front frame 19. The attachment work of the telescopic boom 15 to the body 13 is completed.

  On the other hand, when the telescopic boom 15 is brought into the transport state, basically, the above-mentioned mounting procedure may be reversed, the telescopic boom 15 is turned forward to remove each wire and hydraulic piping, and moved to the rear side of the bed 28 The raised movable support member 35 is raised by the jack 34 to support the base end side of the telescopic boom 15, and the roller 40 attached to the front frame 19 is mounted on the upper surface of the front side support member 39, and the pin insertion hole After removing the foot pins from 13c and 15c, the movable support member 35 may be moved and fixed to a predetermined position in front of the loading platform. Further, the boom stopper 43 and the boom support member 41 may be attached and detached as appropriate.

  As described above, since the telescopic boom 15 can be attached to and detached from the upper swing body 13 without using a large crane, even when the site using the large ground drill 11 is a narrow land where a large crane can not be inserted, there is no large crane The telescopic boom 15 can be attached and detached. In addition, since the jack 34 and the movable support member 35 can be moved back and forth, the boom foot 15b does not protrude rearward from the loading platform 28 during transportation, and the safety during transportation is ensured while securing the workability when attaching and detaching the boom. Can be In addition, since the heights of the pin insertion holes are adjusted by the jacks 34, fine adjustment is possible compared to a crane, and the workability at the time of pin insertion can be improved. Furthermore, the safety is also improved because the heavy load is not lifted.

  In addition, although this invention is optimal for attachment or detachment of the telescopic boom in the earth drill which undulates a telescopic boom with an undulation wire as shown in the said embodiment, it is applicable also to the boom of another construction machine. Moreover, an appropriate auxiliary member can be used according to the shape of the boom.

11: Earth drill, 12: Lower traveling body, 13: Upper revolving body, 13a: Gantry, 13b: Boom bracket, 13c: Pin insertion hole, 14: Base machine, 15: Telescopic boom, 15a: Top sheave block, 15b ... Boom foot, 15c: pin insertion hole, 16: main wire, 17: swivel, 18: kelly bar, 19: front frame, 20: frame cylinder, 21: kelly bar rotary drive, 22: bottomed bucket, 23: pendant rope, 24 ... Unevening wire, 25: secondary wire, 26: hydraulic piping, 27: trailer, 28: loading platform, 31: rear support means, 32: front support means, 33: guide rail, 34: jack, 34a: jack plate, 34b ... Recess 35, movable support member 36, cylinder 37, covering member 37a, suspension bracket 37 ... reinforcing plate, 37c ... guide projection, 37d ... engaging member, 38 ... fixing portion, 39 ... front-side supporting member, 40 ... roller, 41 ... boom support member, 42 ... wheel clasp, 43 ... boom stopper

Claims (2)

  A boom mounted to be able to move up and down via a foot pin inserted through a pin insertion hole respectively formed in a boom bracket provided on the upper swing body of a base machine in a construction machine and a boom foot on the base end side of the boom Rear support means for supporting a base end side of a center of gravity of the boom on the rear side of a carrier of the transport vehicle for transporting the boom; and a center of gravity of the boom on the front side of the carrier A front support means for supporting the front end side, wherein the rear support means is movable in the front-rear direction by being guided by the pair of left and right guide rails provided in the rear side front-rear direction of the bed and the guide rails A pair of left and right jacks provided and both ends are respectively supported by the left and right jacks so as to be movable up and down and to be movable together with the jacks in the front and rear direction A moving support member, and a pair of left and right cylinders for moving the jacks in the front-rear direction, and the front support means includes a front support member provided on the front side of the bed and a tip end side of the boom A boom attaching / detaching device comprising: a roller which is provided and which rolls on the front side support member in the front-rear direction.   The boom attaching / detaching device according to claim 1, wherein the construction machine is an earth drill, and the boom is a telescopic boom which is undulated by an undulating wire.

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