JP7112231B2 - drilling rig stand - Google Patents

Description

TECHNICAL FIELD The present invention relates to a drilling rig stand, and more particularly to a drilling rig stand for holding a drilling rig detachably attached to the tip of an earth drill in an upright state when not in use.

An earth drill generally performs excavation work by rotating and pushing a kelly bar with a drilling device attached to its tip into the ground, and various drilling devices are selectively attached as the work progresses. The excavator includes, for example, a bottom expanding bucket that expands the diameter of the deepest part of an excavation hole, a diameter expanding device that forms a large-diameter joint in the intermediate part, and the like. For this reason, it is necessary to provide a stand for storing the drilling rig while it is held by a suitable stand when not in use, or for holding the rig in the posture during transportation. Therefore, as a stand for these excavators, a stand for an expanded-bottom bucket has been developed that can hold the expanded-bottom bucket in an upright state and can be placed on a truck in a laid-down state during transportation (see, for example, Patent Documents 1).

JP 2010-31633 A

However, in the stand for the wide-bottomed bucket described in the above-mentioned Patent Document 1, due to its structure, the position of the stand cannot be changed due to the relationship between the mounting position of the hanging bracket provided on the upper part of the stand and the position of the center of gravity used when tilting the stand. Currently, a crane is used to pull it sideways in order to change it, but it was an unstable work.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a stand for an excavator that is provided with a sling fitting capable of easily changing the attitude of the stand that holds the excavator.

In order to achieve the above object, the drilling rig stand of the present invention holds a drilling rig detachably attached to the tip of a kelly bar of an earth drill in an upright state and in a laid down state during transportation. A stand comprising: a lower frame and an upper frame respectively framed by a plurality of frame members; a plurality of vertical frame members whose upper and lower ends are respectively joined to both upper and lower frames; and a front vertical frame member. a plurality of hoisting metal fittings having a hoisting portion provided on the front surface to which a hoisting rope can be attached and detached, the plurality of hoisting metal fittings having a fulcrum at the rear edge of the lower frame when the excavator is erected; and a lifting sling used to raise the excavator forward from the lying state with the rear edge as a fulcrum, the sling for tilting provided so that the suspension part to which the lifting rope is attached is positioned rearward in the horizontal direction with respect to the rear edge part in a state in which the stand holding the drilling device is lifted using a chisel, In a state in which the stand holding the excavating device is lifted using only the lifting fitting, the lifting portion to which the lifting rope is attached is positioned horizontally forward with respect to the rear edge portion. It is characterized by having

According to the stand for excavating equipment of the present invention, in a state in which the stand holding the excavating equipment is lifted, the lifting fitting for tilting having the suspending portion positioned on the rear side with respect to the rear edge, and the rear edge. Since it is provided with a lifting fitting having a hanging portion located on the front side of the lifting operation, the combined center of gravity of the drilling rig and the stand that moves along with the lifting operation is moved to the opposite side beyond the rear edge. can be positioned. For this reason, if the tilting sling fitting is used, a rotational moment in the direction of tilting with the rear edge as a fulcrum acts as the crane is lowered, so that the stand can be reliably tilted. On the other hand, if a lifting fitting is used, a rotational moment acts in a lifting direction with the rear edge as a fulcrum, so that the stand can be reliably lifted. Therefore, the attitude of the stand can be changed only by a simple operation of lifting and lowering by a crane.

1 is a front view of an excavator stand showing one embodiment of the present invention; FIG. It is also a side view. It is also a plan view. FIG. 2 is a sectional view along IV-IV in FIG. 1; 1 is a front view of an excavator stand showing a state in which an excavator is held; FIG. It is also a side view. It is also a plan view. 6 is a cross-sectional view taken along line VIII-VIII of FIG. 5; FIG. It is explanatory drawing which shows the stand of the state which hold|maintained the drilling apparatus and stood up. FIG. 10 is an explanatory view showing a state in which the stand is lifted using the lifting fitting for tilting; FIG. 10 is an explanatory view showing a state in which the stand is lifted using the lifting fitting and the moving fitting; FIG. 11 is an explanatory view showing a state in which the stand is lifted using the lifting fitting;

1 to 12 show one embodiment of a drilling rig stand of the present invention, and a drilling rig stand (hereinafter referred to as a stand) 11 shown in this embodiment is shown in FIGS. 1 to 4. FIG. , a lower frame 12 and an upper frame 13 respectively framed by a plurality of frame members, a plurality of vertical frame members 14 having both upper and lower ends respectively joined to the upper and lower frames 12 and 13, and a plurality of vertical frame members 14 at required positions. It is framed in a substantially rectangular parallelepiped shape by connecting a plurality of arranged reinforcing members 15 .

The lower frame 12 is formed in a rectangular shape by four outer frame members 12a, and reinforcing members 12b are provided at both front corners. A pair of left and right reinforcing members 12c, 12c are arranged across the center of the lower frame 12 in the longitudinal direction to hold the lower portion of a diameter expanding device 16, which is one of the drilling devices described later. A lower holding member 17 is provided.

The lower holding member 17 is used as a fixture when the diameter expanding device 16 is held in an upright state or when it is transported in a laid down state. Support plates 17c, 17c for supporting the lower portion of the diameter expanding device 16 are provided on both left and right sides of the cylindrical member 17a, which can be joined, and which are reinforced by a plurality of reinforcing members 17b. A pair of bifurcated portions 17d and 17e are provided on both front and rear sides of the support plate 17c so that the front side is vertically shorter than the rear side. One end of the L-shaped locking member 17f is inserted into the forked portion 17e on the front side so that it can be rotated in the front-rear direction by the pivot pin 18, and the other end is inserted into the forked portion 17d on the rear side. , and can be fixed with a fixing pin 19 .

The upper frame 13 is assembled in a U-shape in plan view with an open front side by three outer frame members 13a arranged on both sides and a rear portion, and a plurality of reinforcing members 13b are framed on the opening side. An opening 20 having an opening width that allows the upper portion of the diameter expanding device 16 in the closed state to enter and exit in the horizontal direction is provided. Furthermore, an upper holding member 21 for holding the upper portion of the diameter expanding device 16 is provided at the center of the edge of the opening 20 . The upper holding member 21 is used as a fixture when the diameter expanding device 16 is held on the stand 11 and lifted or transported. The top is configured to engage.

On the upper surface of the upper frame 13, there is a wire netting member that serves as a working scaffold when the stand 11 is erected to attach or detach the diameter expansion device 16 to a kelly bar (not shown) of an earth drill or to attach or detach hydraulic piping. and a handrail member 24 erected vertically from the outer edge of the scaffolding member 23 so as to surround the outer periphery of the scaffolding member 23 excluding the opening 20 portion. In addition, on the rear surface of the stand 11, an elevating ladder 25 used for elevating the scaffold member 23 is integrally provided along the vertical frame member 14. As shown in FIG.

On the front surface of the vertical frame member 14 on the front side, a plurality of hanging metal fittings having different mounting positions in the vertical direction are provided. , a pair of left and right lifting fittings 27, 27 provided in the vicinity of the lower frame 12, and a pair of right and left lifting fittings provided in the intermediate portion between the lifting fitting 26 and the moving hanging fitting 27. 28, 28. Each hanging metal fitting 26, 27, 28 is made by welding a substantially triangular thick plate material to the vertical frame member 14 with the tip facing slightly inward. ) are provided as suspension holes 26a, 27a, and 28a, respectively.

Further, the tilting hanger 28 is provided so that a straight line 30 passing through the composite center of gravity W of the diameter expanding device 16 and the stand 11 and the hanger hole 28a is located behind the rear edge 12d. In other words, in a state in which the stand 11 is lifted integrally with the diameter expanding device 16 using only the tilting hanger 28, the hanger hole 28a extends horizontally rearward with respect to the rear edge 12d of the lower frame 12. (Fig. 10). On the other hand, the raising hanging metal fitting 26 is provided so that a straight line 31 passing through the composite center of gravity W of the diameter expanding device 16 and the stand 11 and the hanging hole 26a is positioned forward of the rear side edge 12d. In other words, in a similarly lifted state using only the lifting hanging hardware 26, the hanging hole 26a is provided so as to be positioned horizontally forward with respect to the rear edge 12d (FIG. 12).

The stand 11 formed in this manner accommodates and holds the diameter expander 16 removed from the tip of the caliber in an upright position when not in use. Therefore, the holding structure of the diameter expanding device 16 will be described below with reference to FIGS. 5 to 8. FIG.

The diameter expanding device 16 includes a rectangular tubular support 16a, two scraper blades 16b and two excavating blades 16c attached to the side surface of the support 16a so as to be openable and closable, and an inner wall of the support 16a. a hydraulic cylinder (not shown). The support 16a is formed in a square shape in plan view, and has an upper connecting portion 16d at its upper end that is detachably connected to the tip of the kelly bar. A lower connecting portion 16e is provided for detachably connecting . Brackets 16f, 16f through which fixing pins 22 are inserted are provided on both sides of the upper end of the support 16a.

In addition, first support shafts 16g and second support shafts 16h are alternately provided at four locations on the outer surface of the lower end portion of the support 16a at intervals of 90 degrees. The first support shaft 16g and the second support shaft 16h are horizontally supported by a pair of first shaft support members 16i, 16i and second shaft support members 16j, 16j projecting from the outer surface of the lower end of the support 16a. A lower end portion of the scraper blade 16b is rotatably connected to the first support shaft 16g, and a lower end portion of the excavation blade 16c is rotatably connected to the second support shaft 16h. As a result, the scraper blade 16b and the excavator blade 16c are formed so that their upper portions can swing inward and outward about the support shafts 16g and 16h as the hydraulic cylinders expand and contract.

In order to store and hold the diameter expanding device 16 in the stand 11, first, both locking members 17f, 17f of the lower holding member 17 are rotated forward to be in the open state indicated by the imaginary line in FIG. Next, the scraper wing 16 b and the excavating wing 16 c are closed, and the diameter expanding device 16 attached to the tip of the kerrie bar is moved to the front surface of the stand 11 . Next, the diameter expanding device 16 is horizontally moved to position the upper portion of the support 16a in the opening 20 of the stand 11, and the positions of the lower connecting portion 16e and the cylindrical member 17a of the lower holding member 17 are moved horizontally. Match the direction. As the diameter expanding device 16 is lowered, the lower connecting portion 16e is fitted into the cylindrical member 17a, and the lower end of the first shaft support member 16i comes into contact with the support plate 17c to support the diameter expanding device 16. .

Subsequently, both the locking members 17f, 17f are rotated rearward and locked to the first shaft support members 16i, 16i, respectively, so that the closed state shown by the solid line in FIG. Then, the locking member 17f is prevented from opening. As a result, the lower portion of the diameter expanding device 16 is fixed to the lower holding member 17, and movement of the diameter expanding device 16 in the front, rear, left, and right directions is restricted. Finally, by releasing the connection between the tip of the kelly bar and the upper connecting portion 16 d , the diameter expanding device 16 is held alone by the stand 11 . Further, by attaching another excavating device such as an expanding bucket to the tip of the kelly bar, the excavation work can be continued. A diameter device 16 is attached.

On the other hand, when the diameter expanding device 16 is transported in a lying state, the upper portion of the diameter expanding device 16 is held by inserting the fixing pins 22 through the brackets 16f and 21a in advance before tilting the stand 11. to Here, the attitude change of the stand 11 holding the diameter expanding device 16 will be described with reference to FIGS. 9 to 12. FIG.

First, as shown in FIG. 9, when laying down the diameter expanding device 16 held by the stand 11 from the standing state, as shown in FIG. One end of a lifting rope 29 is attached via a shackle 32, and the other end is hung on a hook 33 of a crane for lifting. At this time, the combined center of gravity W of the hoisted diameter expanding device 16 and the stand 11 moves below the suspension hole 28a, and the vertical line 30 passing through the suspension hole 28a and the combined center of gravity W is aligned with the rear edge 12d. It will be in a state of being positioned rearward in the horizontal direction by a distance L1. By lowering the crane from this state (FIG. 10), the stand 11 is tilted backward with the grounded rear edge 12d as a fulcrum.

As shown in FIG. 11, when the stand 11 is laid down, the lifting rope 29 is hung from the hanging hole 28a of the folding hanging metal fitting 28 to the hanging holes 26a and 27a of the raising lifting metal fitting 26 and the moving lifting metal fitting 27. By changing it, it is transported to the bed of the truck while being lifted horizontally.

When the diameter expanding device 16 held by the stand 11 is to be erected from a lying state, as shown in FIG. lift. At this time, the combined center of gravity W of the hoisted diameter expanding device 16 and the stand 11 moves below the suspension hole 26a, and the vertical line 31 passing through the suspension hole 26a and the combined center of gravity W is aligned with the rear edge 12d. It will be in a state of being positioned on the front side in the horizontal direction by a distance L2. By lowering the crane from this state (FIG. 12), the stand 11 is raised forward with the grounded rear edge 12d as a fulcrum.

In this way, in a state in which the stand 11 holding the diameter expanding device 16 is lifted, the tilting hanger 28 having the hanger hole 28a positioned on the rear side with respect to the rear edge 12d and the rear edge 12d are arranged. , the composite center of gravity W of the diameter expanding device 16 and the stand 11, which moves along with the lifting operation, is positioned at the rear edge. It can be located on the opposite side beyond 12d. For this reason, if the tilting sling fitting 28 is used, a rotational moment in the direction of tilting with the rear edge 12d as a fulcrum acts as the crane is lowered, so that the stand 11 can be reliably tilted. On the other hand, if the lifting hanging hardware 26 is used, a rotational moment acts in the lifting direction with the rear edge 12d as a fulcrum, so that the stand 11 can be reliably raised. Therefore, the posture of the stand 11 can be changed only by a simple operation of lifting and lowering by a crane.

It should be noted that the present invention is not limited to the above embodiments, and although the diameter expansion device is used as one of the excavating devices held by the stand, it is not limited to this, and other excavating devices such as an expanding bottom bucket can be used. It can be formed as a stand that is also applicable to In this case, the position of the suspending portion can be appropriately changed in consideration of the positional relationship between the combined center of gravity in the suspended state and the rear edge portion. In addition, the shape and arrangement of the lower frame, upper frame, vertical frame members and reinforcing members, and the external shape when these are connected are appropriately set according to the conditions such as the size and weight of the drilling rig to be held. The structures of the lower holding member and the upper holding member can also be appropriately set.

DESCRIPTION OF SYMBOLS 11... Stand, 12... Lower frame, 12a... Outer frame material, 12b, 12c... Reinforcing material, 12d... Rear edge part, 13... Upper frame, 13a... Outer frame material, 13b... Reinforcing material, 14... Vertical Frame member 15 Reinforcing member 16 Expanding device 16a Support body 16b Scraper blade 16c Excavating blade 16d Upper connecting part 16e Lower connecting part 16f Bracket 16g First support Axle 16h Second support shaft 16i First shaft support member 16j Second shaft support member 17 Lower holding member 17a Cylindrical member 17b Reinforcement member 17c Support plate 17d, 17e Bifurcated portion 17f Locking member 18 Turning pin 19 Fixing pin 20 Opening 21 Upper holding member 21a Bracket 22 Fixing pin 23 Scaffolding member 24 Handrail member 25... Lifting ladder, 26... Raising hanging hardware, 26a... Hanging hole, 27... Moving hanging hardware, 27a... Hanging hole, 28... Folding hanging hardware, 28a... Hanging hole, 29... Lifting rope, 30, 31... straight line, 32... shackle, 33... hook

Claims (1)

A stand for a drilling rig that is detachably attached to the tip of a kelly bar of an earth drill and holds the drilling rig in an upright state and in a laying down state during transportation, the lower frame being framed by a plurality of frame members. It has a body and an upper frame, a plurality of vertical frame members whose upper and lower ends are respectively joined to both upper and lower frames, and a suspension part provided on the front surface of the front vertical frame member to which a lifting rope can be attached and detached. a plurality of sling fittings, the plurality of sling fittings being used for tilting the excavating device rearward with the rear edge of the lower frame as a fulcrum from the upright state; and the excavation. A state in which the stand holding the drilling rig is lifted using only the tilting sling fitting, including a lifting sling fitting used to raise the rig forward using the rear edge as a fulcrum from a laid-down state. The suspension part to which the lifting rope is attached is provided so as to be positioned rearward in the horizontal direction with respect to the rear edge part, and the excavator is held using only the lifting fitting. A stand for an excavator, characterized in that, in a state in which the stand is lifted, the hanging portion to which the lifting rope is attached is positioned horizontally forward with respect to the rear edge portion.

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