JP2010031633A - Stand for enlarged bottom bucket - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stand for an enlarged bottom bucket capable of holding the enlarged bottom bucket in a raised state and holding the enlarged bottom bucket in an inclined state as well, and capable of safely performing attaching/detaching operation to a kelly-bar. <P>SOLUTION: The stand for holding the enlarged bottom bucket of an earth drill is provided with a lower part frame body, an upper part frame body and a vertical frame material. The lower part frame body has a lower part holding member for holding a bottom face and a lower part outer face of the enlarged bottom bucket. And the upper part frame body has an opening allowing the enlarged bottom bucket to pass therethrough, an upper part holding member for holding the upper part outer face of the enlarged bottom bucket on the anti-opening side, an attachable/detachable falling preventing member for preventing the fall of the enlarged bottom bucket, a scaffold member used for a working scaffolding when attaching/detaching the enlarged bottom bucket to the earth drill, and a handrail member elected on the scaffolding member and has an upper part hoisting fixture arranged at the upper part of the opening side and the anti-opening side and a lower part hoisting fixture arranged at the lower part of the opening side. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a stand for a widened bucket, and more particularly to a stand for a widened bucket for holding a widened bucket that is detachably attached to the tip of an earth drill in a standing state when not in use.

  When drilling a bottom expansion hole with an earth drill, first, a drilling bucket is attached to the tip of the kelly bar to drill a vertical hole of a predetermined depth, then the excavation bucket is replaced with a bottom expansion bucket and the bottom of the hole is expanded into a tapered shape. It is done by the procedure of. Therefore, it is necessary to replace the excavator attached to the tip of the kelly bar with the excavation bucket and the expanded bucket as the excavation progresses, and the excavated bucket and expanded bucket when not installed are stored in a state where they are held by an appropriate stand. Like to do. Also, during transportation, a holding device that holds each bucket and bucket drive device removed from the tip of the Keriba in the posture during transportation is required.

  For example, as a bucket driving device pedestal for driving a digging bucket or a bottom expansion bucket, a bucket driving device is known that holds a bucket driving device with a plurality of support columns erected on a frame (see, for example, Patent Document 1). Further, as a holding device for a bottom expansion bucket, there is known a bottom expansion bucket support device in which a bottom expansion bucket is placed via a support tool on a casing embedded in a surface portion of a vertical hole excavated from the ground. (For example, refer to Patent Document 2).

JP 2002-201886 A JP 2000-192770 A

  However, in the case where the bucket drive device is held in an inclined state like the bucket drive device mount described in Patent Document 1, the kelly bar must be inclined when the bucket drive device is attached to and detached from the kelly bar. However, in the case of a bucket drive that rarely attaches and detaches during work, there is little problem, but in the case of excavation buckets and bottom expansion buckets that are exchanged during work, it can be attached and detached without tilting the kelly bar It is desirable to do.

  On the other hand, since the support device for the bottomed bucket described in Patent Document 2 can hold the drilling bucket and the bottomed bucket with their axes oriented in the vertical direction, it can be easily attached to and detached from the kelly bar. There is a problem that a vertical hole is required for installing the support device.

  In addition, when the bottom expansion bucket is held on a stand installed on the ground surface with its axis line oriented in the vertical direction, it is necessary to take sufficient safety measures because the attachment and detachment between the kelly bar and the bottom expansion bucket is a high place work.

  Furthermore, when the stand is held with the axis of the bottom-up bucket standing in the vertical direction, the height exceeds the transport limit. Not only is the support device required to be prepared separately, but an additional truck for transporting the stand to be used at the time of work must be arranged, resulting in increased transportation costs.

  Therefore, an object of the present invention is to provide a stand for a bottom-up bucket that can hold the bottom-up bucket in an upright state, can be safely attached to and detached from the kelly bar, and can be easily transported.

  In order to achieve the above object, a stand for a widened bucket according to the present invention is a stand for a widened bucket that holds a widened bucket that is detachably attached to the tip of a kelly bar of an earth drill, and is each framed by a plurality of frame members. A lower frame and an upper frame; a plurality of vertical frame members each having upper and lower ends joined to both upper and lower frames; and a plurality of suspension fittings. A lower holding member for holding an outer surface; the upper frame body has an opening through which a widened bucket provided on one side can pass; and an upper holding for holding the upper outer surface of the widened bucket on the side opposite to the opening It is characterized by having a member, a scaffold member which becomes a working scaffold when the bottomed bucket is attached to and detached from the earth drill, and a handrail member standing on the outer edge of the scaffold member.

  Furthermore, the stand for a bottom expansion bucket of the present invention is characterized in that the upper frame body is provided with a detachable fall-preventing member for preventing the bottom expansion bucket held in the stand from falling to the opening side, The fall-preventing member is arranged so as to cross the opening end of the opening. Alternatively, the lower holding member is provided with an openable / closable fall-preventing member that prevents the bottom-enlarged bucket held in the stand from falling to the opening side on the upper part of the lower holding member. The stop member is formed of a door member capable of opening and closing the opening, and the door member is formed so as not to protrude outward from the lower frame body and the upper frame body in the opened state. It is said.

  Further, in the stand for an expanded bottom bucket according to the present invention, the suspension fitting is provided on the opening side and a plurality of upper suspension fittings provided respectively on the opening side and the non-opening side of the upper frame body or the vertical frame member. A plurality of lower suspension brackets provided at the lower part of the lower frame or the vertical frame member at a position corresponding to the upper suspension brackets provided, or the suspension bracket is a reaction of the upper part of the upper frame member or the vertical frame member. A plurality of upper suspension fittings provided on the opening side, and a plurality of lower suspension fittings provided at a lower frame body or a vertical frame member at a position corresponding to the upper suspension fitting.

  Further, the upper frame body or the vertical frame member is detachably locked to a locking portion provided at an upper portion of the bottom expansion bucket to prevent the bottom expansion bucket from coming out upward from the inside of the bottom expansion bucket stand. It is characterized by having a locking member. In addition, the scaffold member is formed so as to be divided inward and outward directions, and the handrail member is detachably provided on the scaffold member. The ladder for raising and lowering the scaffold member is integrally provided.

  According to the stand for a widened bucket of the present invention, the lower holding member, the upper holding member, and the fall-preventing member are provided in the stand that is framed by the lower frame body, the upper frame body, and the plurality of vertical frame members. Since the opening is provided on one side, with the stand upright, the expansion bucket attached to the Keriba can be inserted into the stand or removed from the stand. It can be easily performed in the state of being directed. Further, by providing the scaffold member and the handrail member on the upper frame, it is possible to safely perform the attaching / detaching operation to / from the kelly bar, which is a work at a high place.

  In addition, by providing a locking member that prevents the bottom expansion bucket from pulling upward from the stand, it is possible to lift the stand together with the bottom expansion bucket when the kelly bar with the bottom expansion bucket is raised. The stand containing the widened bucket can be easily moved by an earth drill.

  Furthermore, by forming the scaffold member so that it can be divided inward and outward, and by forming the handrail member so as to be detachable, it can be sized within the range of transportation restrictions when the stand is laid, and the stand can be raised. A sufficient working space can be secured when performing the work of attaching and detaching the bottom expansion bucket. Further, by integrating the lifting ladder into the stand, it is not necessary to prepare a separate ladder.

It is explanatory drawing of an earth drill. It is a front view which shows the 1st form example of the stand for wide bottom buckets of this invention. Similarly, it is a left side view. It is also a plan view. It is a front view which shows the 2nd form example of the stand for wide bottom buckets of this invention. Similarly, it is a left side view. It is also a plan view. It is a front view which shows the 3rd example of a stand for wide bottom buckets of this invention. Similarly, it is a right side view. It is also a plan view. It is a front view which shows the locking member of a non-locking state. It is a front view which shows the latching member of a latching state. It is a front view of the latching member which shows the latching state when a bottom expansion bucket raises. It is a front view which shows the other example of a locking member. It is a front view at the time of lifting the stand of the standing state. It is a front view at the time of lifting up the stand in the laid state. It is a side view at the time of lifting up the stand of the state which also laid down. It is a front view at the time of lying down the stand of the standing state. It is a front view at the time of standing the stand in the state of being laid. It is a front view which shows the 4th example of a stand for wide bottom buckets of this invention. Similarly, it is a left side view. It is a back view similarly. It is also a plan view. It is XXIV-XXIV sectional drawing of FIG. It is XXV-XXV sectional drawing of FIG. It is XXVI-XXVI sectional drawing of FIG. It is explanatory drawing of the stand at the time of transporting with a truck, and a bottom-up bucket. It is explanatory drawing at the time of unloading a stand. It is explanatory drawing at the time of standing the stand in the state of being laid. It is explanatory drawing at the time of standing up the bottomed bucket of the state which laid down. It is explanatory drawing at the time of accommodating a bottom-up bucket in a stand.

  First, in the first embodiment shown in FIGS. 1 to 4, the earth drill 11 is a winch (not shown) mounted on a sheave 14 rotatably supported at the tip of a boom 13 provided in a self-propelled base machine 12. A wire rope 15 drawn out from the wire rope 15 is wound, a kelly bar 17 is rotatably suspended from the tip of the wire rope 15 via a swivel joint 16, and the kelly bar 17 is moved up and down by operating a winch. Further, a kelly bar drive device 19 is provided at the tip of the arm 18 supported by the base machine 12 so that the kelly bar 17 can be moved up and down. The kelly bar drive device 19 rotates the kelly bar 17. It is configured. Furthermore, a rotary table 20 that rotates integrally with the kelly bar 17 but does not move up and down is provided at the lower part of the kelly bar driving device 19. A kelly bar 17 that protrudes downward from the rotary table 20 is provided at the lower end of the kelly bar 17. The bottomed bucket 21 and the excavating bucket (not shown) that rotate integrally with the 17 and move up and down are detachably mounted.

  The bottom expansion bucket 21 is provided at its lower end with a disc-shaped bottom cover 22 for discharging excavated earth and sand, and a pair of bottom expansion wings 23 is provided on the trunk so as to be openable and closable. The outer surface of the widened wing 23 in the closed state has a cylindrical shape with an outer diameter corresponding to the inner diameter of the vertical hole excavated by the excavating bucket, and the widened bucket 21 is opened while the widened wing 23 is opened by hydraulic pressure supplied via the rotary table 20. By rotating, the bottom of the hole is formed into a tapered shape by the excavating blade at the tip of the expanded wing.

  An expanded bucket stand (hereinafter referred to as a stand) 31 that holds the expanded bucket 21 includes a lower frame 32 and an upper frame 33 that are respectively framed by a plurality of frame members, and upper and lower frames 32 and 33. A plurality of vertical frame members 34 joined to each other and a plurality of reinforcing members 35 arranged at required positions are combined to form a rectangular parallelepiped shape.

  The lower frame 32 assembled in four directions by the four outer frame members 32 a includes four bottom surface holding members 36 that hold the bottom surface of the bottomed bucket 21 as bottom holding members of the bottomed bucket 21, and the bottomed bucket 21. A ring-shaped outer surface holding member 37 that holds the lower outer surface of the outer surface holding member 37 is provided. On the outer peripheral side of the outer surface holding member 37, the reinforcing member 35 including a plurality of support columns and the like is provided. The inner diameter of the outer surface holding member 37 is set to be slightly larger than the lower diameter of the widened bucket 21, that is, the outer diameter of the widened wing 23 in the closed state, and the lower portion of the held widened bucket 21 is prevented from moving in the front-rear and left-right directions. is doing.

  The upper frame 33 is assembled in a U-shape in plan view by three frame members 33a arranged on both sides and the rear, and the closed bottom expanded wing 23 can pass through the front which is one side thereof. An opening 38 having a wide opening width is provided. The rear side of the upper frame 33 that is on the side opposite to the opening has an inner diameter corresponding to the outer diameter of the expanded bottom blade 23 in the closed state, and the upper rear surface side of the expanded bottom blade 23 is brought into contact with the bottom expanded bucket 21. An arc-shaped upper holding member 39 that holds the upper portion from the rear side is provided.

  Further, a fall-preventing member 40 is provided at the center of the upper surface of the upper frame 33 in the direction horizontally across the opening 38. Both ends of the fall-preventing member 40 are detachably secured to the pair of left and right holders 41 provided on the inner member 33b of the upper frame 33 with fixing pins 41a. With the bottom expansion bucket 21 being housed and held at the position, the fall prevention member 40 is penetrated from one of the plurality of openings provided on the upper peripheral surface of the bottom expansion bucket 21 toward the other opening, and the fall prevention member The center part of 40 is brought into contact with the front side of the shaft member 21a provided inside the bottom-enlarged bucket 21, and both end parts of the fall-preventing member 40 are fixed to the holder 41 by the fixing pins 41a. The upper portion of the bucket 21 is prevented from falling to the front and outside of the opening 38.

  Further, on the upper surface of the upper frame 33, a stand 31 is set up to form a wire mesh that serves as a working scaffold for workers when the bottomed bucket 21 is attached to or detached from the kelly bar 17 of the earth drill 11 or a hydraulic pipe is attached or detached. A scaffold member 42 formed by the members and a handrail member 43 erected vertically from the outer edge of the scaffold member 42 so as to surround the outer periphery excluding the opening 38 portion of the scaffold member 42 are provided. The handrail member 43 is inserted into a fitting cylinder 43a provided on the upper surface of the upper frame 33 with an upper opening, and the lower end portion of the handrail member 43 is inserted from above to be fixed by a retaining pin 43b. . As shown in FIG. 2, on the right side of the front surface of the stand 31, an elevating ladder 44 used when elevating to the scaffold member 42 is integrally provided along the vertical frame member 34.

  The upper frame 33 has an opening side (front part) and a non-opening part side (rear part), each provided with a front side upper hanging bracket 45a and a rear side upper hanging bracket 45b. The lower frame 32 is provided with two lower suspension brackets at two locations on both sides of the opening 38 so as to correspond to the front upper suspension bracket 45a of the upper frame 33. 46 are provided.

  As described above, the lower frame 32 of the stand 31 is provided with the bottom surface holding member 36 and the outer surface holding member 37 so as to securely hold the lower portion of the bottomed bucket 21. The holding member 39 is provided so as to hold the upper portion of the widened bucket 21 on the rear side, and an opening 38 is provided in the front portion of the stand 31 so that the widened bucket 21 attached to the kelly bar 17 can be When taking out from the inside 31 or inserting into the stand 31, it is only necessary to raise the kelly bar 17 to a position where the lower end of the widened bucket 21 exceeds the ring-shaped outer surface holding member 37, and the entire stand is formed in a cylindrical shape. Compared to the case, the amount of rise of the Keriba 17 can be suppressed.

  In addition, by providing the scaffold member 42 and the handrail member 43 set at a height suitable for the attaching / detaching operation of the kelly bar 17 and the expanded bucket 21 on the upper portion of the stand 31, the attaching / detaching operation of the expanded bucket 21 can be performed safely. Can do. And by setting the height, width and depth dimensions of the stand 31 within the range of transportation restrictions, it is possible to transport the stand 31 containing the bottomed bucket 21 laid down, and to reduce the number of trucks for transportation. Can be reduced.

  FIG. 5 thru | or FIG. 7 has shown the 2nd example of the stand for wide bottom buckets of this invention. In the following description, the same components as the components of the bottomed bucket shown in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The stand for a widened bucket shown in this embodiment is basically framed by a lower frame 32, an upper frame 33, a plurality of vertical frame members 34, and a plurality of reinforcing members 35, as in the first embodiment. The lower frame 32 is provided with a bottom surface holding member 36 and an outer surface holding member 37, and the upper frame 33 is provided with an upper holding member 39 located at the rear of the opening 38 and a detachable fall-preventing member. 40, a horizontal scaffolding member 42, and a vertical handrail member 43.

  In the handrail member 43 in this embodiment, the lower end portion is bent inward at a right angle, and the lower end portion is laterally inserted into the fitting tube 43a provided on the outer peripheral portion of the upper frame body 33 and opened to the side. And is fixed in a detachable state by a retaining pin 43b. A closing plate 43c that is continuous from the outer end of the scaffold member 42 is attached to the inside of the bent portion, and the end portion of the scaffold member 42 and the lower portion of the handrail member 43 are attached by the closing plate 43c. As a result, the working range of the scaffold is expanded. Further, in this embodiment, the elevating ladder is prepared for elevating to the scaffold member 42 by preparing a ladder 44 a separate from the stand 31. The ladder 44a can be a ladder that is equipped with an earth drill or is prepared at the work site.

  Thus, by providing the handrail member 43 provided with the closing plate 43c which becomes a part of the scaffold so as to be detachable from the handrail member 43, a sufficient work space can be obtained by attaching the handrail member 43 when the bottom expansion bucket 21 is attached or detached. It can be secured and can be accommodated within the transport limit by removing the handrail member 43 during transport.

  FIGS. 8 to 10 show a third embodiment of the expanded bucket stand according to the present invention. The expanded bucket stand shown in the present embodiment is basically the same as the first and second embodiments. Like each stand shown, the lower frame 32, the upper frame 33, the plurality of vertical frame members 34, and the plurality of reinforcing members 35 are framed in a rectangular parallelepiped shape. And an outer surface holding member 37. The upper frame 33 is provided with an upper holding member 39 provided on the rear side opposite to the opening 38, a detachable fall-preventing member 40, and a horizontal scaffolding member 42. The vertical handrail member 43 and the raising / lowering ladder 44 provided at the rear of the right side surface are configured.

  Among the handrail members 43 in this embodiment, an intermediate handrail member 47 disposed at a central portion in the length direction of the scaffold member 42 and having a narrow width dimension of the scaffold member 42 due to the cylindrical shape of the bottomed bucket 21. In addition, the working range of the scaffold is expanded and the generation of a large gap is prevented by forming the outer curved shape and providing the closing plate 47a in the curved portion.

  Further, the fall-preventing member 48 in this embodiment is arranged so as to cross the opening end of the opening 38 in the upper frame 33, and both ends are fixed by holders 49 provided at the opening edge of the upper frame 33. Thus, the upper front side of the widened bucket 21 is partitioned to prevent the upper part of the widened bucket 21 from falling to the outside of the opening 38, and the opening edges of the opening 38 are connected by the fall-preventing member 48. Accordingly, the upper frame 33 is reinforced to increase the rigidity of the upper portion of the stand 31.

  Further, the upper frame 33 is provided with a locking member 50 that is detachably locked to a locking portion 24 provided on the bottom expansion bucket 21 and prevents the bottom expansion bucket 21 from being pulled upward from the stand 31. It has been. That is, in the first embodiment and the second embodiment, since the fall-preventing member 40 is disposed so as to penetrate the opening provided in the upper portion of the bottom expansion bucket 21, the stored bottom expansion bucket 21 is in the stand 31. The fall-preventing member 40 can prevent the bottom expansion bucket 21 from moving upward from the inside of the stand 31 in the laid state, for example, as shown in the third embodiment. When the fall-preventing member 48 is disposed so as to cross the open end of 38, the effect of preventing the bottom-up bucket 21 from being pulled out cannot be obtained. Therefore, the locking member 50 is provided to prevent the bottom-up bucket 21 from slipping out. I try to prevent it.

  FIGS. 11 to 13 show an example of one form of the locking member. The locking member 50 includes a base member 51 fixed to an inner portion of the upper surface of the upper frame 33, and the base member 51. And a support shaft 53 for holding the hook 52 on the base member 51, and a holding pin 54 for holding the hook 52 in a non-locking state. . A hook portion 52 a that engages with the engagement portion 24 of the bottom expansion bucket 21 is provided at the front end of the hook 52 in the inside (bottom expansion bucket side), and the support shaft 53 and the holding pin 54 are disposed below the hook 52. A long hole 52b in the inner and outer direction is provided. In addition, two attachment holes 51 a and 51 b for attaching the holding pins 54 according to the state of the hook 52 are provided on the side opposite to the support shaft 53 (outer side) and the intermediate portion of the base member 51. .

  As shown in FIG. 11, in the locking member 50 in the non-locking state, the hook 52 is positioned outside the base member 51, and the flange portion 52 a is drawn on the upper frame 33. The support shaft 53 is inserted into the inner end of the long hole 52b, and the holding pin 54 attached to the outer attachment hole 51a is inserted into the outer end of the long hole 52b. In this non-locking state, both ends of the long hole 52 b are held at the storage position by the support shaft 53 and the holding pin 54.

  As shown in FIG. 12, in the locking member 50 in the locked state, the hook 52 is moved inward (bottom expansion bucket side) with respect to the base member 51, and the flange portion 52 a is pulled out from the upper frame 33. Thus, the hook portion 52 a is locked to the locking portion 24 of the bottomed bucket 21. At this time, the support shaft 53 is inserted through the outer end portion of the elongated hole 52b of the hook 52, and the hook 52 is in a state in which the flange portion 52a can swing in the vertical direction around the support shaft 53. ing. The holding pin 54 is attached to the attachment hole 51b in the intermediate portion, and restricts the movement of the hook 52 to the outside (disengagement direction).

  When the expanded bottom bucket 21 moves upward with respect to the stand 31 in this locked state, as shown in FIG. 13, the hook 52 a of the hook 52 is locked to the locked portion 24 of the expanded bottom bucket 21. The stored bottomed bucket 21 can be prevented from coming out of the stand 31 upward. On the contrary, when the kelly bar 17 is lifted with the bottom expansion bucket 21 stored and held in the stand 31 attached to the tip of the kelly bar 17, the bottom expansion bucket 21 and the stand 31 can be lifted together. By running the base machine 12 in such a state, the stand 31 holding the bottom expansion bucket 21 can be easily moved only by the ground drill 11 without using a crane.

  FIG. 14 shows another embodiment of the locking member, and this locking member 55 has a hook 58 attached to the upper end portion of the base member 56 provided on the upper surface of the upper frame 33 via a support shaft 57. It is provided so as to be able to swing inward and outward, and in the non-locked state, the upper portion of the hook 58 is inclined outwardly about the support shaft 57, and the holding pin is inserted into the mounting hole 56a on the upper side of the base member 56. 59 is attached to hold the hook 58 in an unlocked state. When the retaining pin 59 is locked, the holding pin 59 is pulled out from the upper mounting hole 56a, the upper portion of the hook 58 is rotated inwardly about the support shaft 57, and the flange portion 58a at the distal end is rotated. Is locked to the lower edges of the plurality of openings 21b provided on the upper peripheral surface of the bottomed bucket 21, and the holding pin 59 is attached to the lower mounting hole 56b to hold the hook 58 in the locked state.

  Each locking member formed in this way can be easily switched between the unlocked state and the locked state by attaching / detaching the holding pin and moving the hook, and the hook is unlocked by the holding pin. By holding it in the middle, there is no hindrance when the bottomed bucket 21 is stored or taken out.

  FIG. 15 thru | or FIG. 19 is explanatory drawing which shows the state at the time of lifting the stand for extended bottom buckets of this invention with a crane. As described above, the stand 31 for the bottom expansion bucket of the present invention has the front-side upper hanging bracket 45a at the two front portions of the upper frame 33 and the rear-side upper hanging bracket 45b at the two rear portions of the upper frame 33. Since the lower suspension fittings 46 are provided at the two front portions of the lower frame 32, the stand for holding and holding the widened bucket 21 by selectively using these suspension fittings depending on the situation. 31 can be easily lifted by a crane, and the posture can be easily changed.

  First, as shown in FIG. 15, when lifting the stand 31 in an upright state, by using the four parts of the front side upper hanging bracket 45 a and the rear side upper hanging bracket 45 b provided on the upper frame 33. It is possible to hang four points in a stable state. Further, as shown in FIGS. 16 and 17, when the stand 31 in a laid state is lifted, the two front side upper hanger 45 a provided on the upper frame 33 and the 2 provided on the lower frame 32 are provided. By using the four places with the lower suspension metal fittings 46, the four-point suspension can be performed in a stable state.

  Furthermore, as shown in FIG. 18, when the stand 31 in an upright state is laid down, the crane is operated in a state where two front side upper hanging brackets 45 a provided on the upper frame 33 are suspended at two points, By tilting the stand 31 backward with the rear edge of the lower frame body 32 as a fulcrum, the stand 31 can be put to sleep. Similarly, when standing the stand 31 in the laid state, as shown in FIG. 19, the crane is operated with the two front side upper hanging brackets 45 a provided on the upper frame 33 being suspended at two points. And the stand 31 can be made to stand by raising the stand 31 forward with the rear edge of the lower frame 32 of the stand 31 as a fulcrum.

  Further, when the stand 31 is laid down, by using the front-side upper hanging bracket 45a provided on the opening side of the upper frame 33, the opening 38 is moved upward when the stand 31 is laid down. Since it becomes the state which opened toward the front, it can be set as the state which hold | maintained the bottom expansion bucket 21 in the stand 31 reliably, and it can prevent that the bottom expansion bucket 21 remove | deviates from the inside of the stand 31 by the vibration etc. during transport.

  Further, when using the front side upper suspension fitting 45 a of the upper frame 33, a force in the direction of narrowing the opening width acts on the front part of the upper frame 33 toward the opening 38. At this time, as shown in the third embodiment, by arranging and fixing the fall-preventing member 40 so as to cross the opening end of the opening 38 in the upper frame 33, the force in the direction of narrowing the opening width is collapsed. The stop member 40 can bear the load, and a single rod-shaped member can be used for both the prevention of the bottom-up bucket 21 from falling and the reinforcement of the front portion of the upper frame 33. On the other hand, as shown in the first embodiment and the second embodiment, when the fall-preventing member 40 is provided at the center of the upper frame 33, the support for reinforcing the opening end of the opening 38 is provided. Members can be provided as needed.

  As shown in FIGS. 16 and 17, the widened bucket 21 and the stand 31 can be loaded on a truck bed with the stand 31 holding the widened bucket 21 laid with its opening 38 facing upward. It can be transported with the bottomed bucket 21 held in the stand 31, and the upper suspension brackets 45a and 45b and the lower suspension bracket 46 are used for loading and unloading on the truck as described above. This can be done easily. Further, the bottomed bucket 21 being transported can be reliably held in the stand 31 by the fall-preventing member 40 and the locking member 50.

  FIGS. 20 to 26 show a fourth embodiment of the bottomed bucket stand of the present invention. The bottomed bucket stand 60 shown in this embodiment is basically the same as the first to third embodiments. Like each stand shown, the lower frame 32, the upper frame 33, the plurality of vertical frame members 34, and the plurality of reinforcing members 35 are framed in a rectangular parallelepiped shape. And an outer surface holding member 37. The upper frame 33 is provided with an upper holding member 39 provided on the rear side opposite to the opening 38, a horizontal scaffolding member 42, a handrail member 43, and a rear rear side. The detachable raising / lowering ladder 44 provided and the fall-preventing member 61 provided in the front are comprised.

  The fall-preventing member 61 is formed of a pair of double-opening door members 61b and 61b whose base portions are rotatably attached to the pair of support frames 62 and 62 via hinges 61a. The support frames 62 and 62 are held on the outer surface. The upper and lower ends are joined to the upper and lower frame bodies 32 and 33 while being joined to the outer peripheral side of the member 37. The door members 61b and 61b are formed of an arcuate frame whose inner diameter is set to a lower part of the bottomed bucket 21, that is, slightly larger than the outer diameter of the bottomed wing 23 in the closed state, and the opening 38 is opened in the closed state. The tip portion is formed in such a size that it does not protrude outward from the upper and lower frame bodies 32 and 33 in the open state in which the opening portion 38 is closed.

  In addition, connecting pipes 61c that overlap in the vertical direction in the closed state of the door members 61b and 61b are respectively provided at the distal ends of the door members 61b and 61b, and pins 63 are inserted into the connecting pipes 61c that overlap in the vertical direction. The closed state of the door members 61b and 61b is maintained. Further, connecting pieces 64 and 64 each having a pin hole connected to each of the connecting pipes 61c project from the vertical frame members 34 and 34 on the opening side, and when the door members 61b and 61b are open, the connecting pieces By inserting the pins 63 into the pin holes 64 and 64 and the connecting pipes 61c, the door members 61b and 61b are kept open. Further, an intermediate holding member 65 that holds the intermediate portion of the bottomed bucket 21 on the rear side is formed on the upper rear side of the door members 61b and 61b, and the pair of support frames 62 are provided on the outer peripheral side of the intermediate holding member 65. 62 and a plurality of reinforcing members 35 are provided.

  The locking members 66 and 66 in the present embodiment are mounted so that the support shaft 66a can swing between the upper frame 33 of the support frames 62 and 62 and the fall-preventing member 61 via pins, respectively. The hook 66b is protruded upward from the upper ends of the support frames 62, 62. When the hook 66b is not locked with the bottomed bucket 21, the hook 66b is in an upright or inclined state around the support shaft 66a. When the state is locked to the widened bucket 21, a plurality of portions provided on the upper peripheral surface of the widened bucket 21 are rotated by turning the upper part of the hook 66 b inward about the support shaft 66 a. It can be locked to the lower edge of the opening 21b.

  Further, in the widened bucket stand 60 shown in this embodiment, a pair of rear upper suspension brackets 45b provided on the side opposite to the opening of the upper frame 33 and the lower frame 32 are provided without providing a front suspension bracket. And a pair of rear lower fittings 46a provided on the opposite opening side.

  FIGS. 27 to 31 are explanatory views until the stand for a widened bucket according to the present invention is transported by a single truck together with the widened bucket and assembled at a work site. First, as shown in FIG. 27, when the bottom-enlarged bucket 21 and the stand 60 are transported by the truck 70, the stand 60 opens the door members 61b and 61b, the pin holes of the connecting pieces 64 and 64, and the connecting pipes. The pin 63 is inserted into 61c, the open state of the door members 61b and 61b is maintained, and the crane is operated in a state where two rear upper suspension brackets 45b provided on the upper frame 33 are suspended. By tilting the stand 60 forward with the front edge of the lower frame 32 as a fulcrum, the stand 60 is laid with the opening 38 facing downward, and the two rear upper suspension brackets 45b provided on the upper frame 33 are provided. The upper part of the widened bucket 21 loaded in advance in a state where it is hung on the loading platform 70a of the truck 70 in a state where it is hung at four points using the four parts of the lower rear mounting bracket 46a provided on the lower frame 32. Or , Loading stand 60 in the carrier 70a while allowing to accommodate the 拡底 bucket 21 into the opening 38. As a result, the number of transport trucks can be reduced, and the bottom-enlarged bucket 21 and the stand 60 are separately placed on the loading platform 70a, so that the stand 60 need not be reinforced and the weight of the stand 60 can be reduced. Can be achieved.

  When unloading the stand 60, as shown in FIG. 28, the stand 60 is hung at four points by using four places, that is, two rear upper suspension brackets 45b and two rear lower suspension brackets 46a. The crane is operated and unloaded in the state of being laid down at the work site as shown in FIG. Next, as shown in FIG. 29 (B), the crane is operated with the two rear upper suspension brackets 45b provided on the upper frame 33 suspended, and the front frame of the lower frame 32 of the stand 31 is moved. By raising the stand 31 backward with the edge as a fulcrum, the stand 31 is raised as shown in FIG.

  Next, as shown in FIG. 30 (A), the widened bucket 21 is lifted at four points, two at the upper part and two at the lower part, and the crane is operated to unload it from the loading platform 70a to the work site. Further, as shown in FIG. 30 (B), the bottom expanded bucket 21 is brought close to the stand 31 while the bottom expanded bucket 21 is erected in the state where two upper portions of the bottom expanded bucket 21 are suspended.

  Then, as shown in FIG. 31A, the bottomed bucket 21 is raised and inserted into the stand 31 through the opening 38 where the door members 61b and 61b of the stand 31 are open, and the bottom holding member 36 is inserted. The bottom surface of the widened bucket 21 is held by the outer surface holding member 37, the intermediate holding member 65, and the upper holding member 39, respectively. In this state, as shown in FIG. 31 (B), the pin 63 connecting the pin hole of the connecting piece 64, 64 and the connecting pipe 61c of the door member 61b, 61b is removed, and the door member 61b, 61b is attached. The closed state is maintained by inserting the pin 63 through the connecting pipes 61c and 61c that are vertically overlapped. Thereby, the bottom expansion bucket 21 can be prevented from falling and the bottom expansion bucket 21 can be held in the stand 31. Further, as shown in FIG. 31 (C), the worker ascends to the scaffold member 42 via the raising / lowering ladder 44 and connects the bottom-up bucket 21 and the kelly bar 17.

  In this way, when the bottomed bucket 21 is transported by the truck 70, the widened bucket 21 loaded on the bed 70a in a state where the stand 31 with the door members 61b and 61b opened and the opening 38 facing downward is laid in advance. The bottom expansion bucket 21 and the stand 31 can be loaded and transported simultaneously on one truck by covering the top of the base plate so that the bottom expansion bucket 21 is accommodated in the opening 38. In this embodiment, since the bottomed bucket 21 and the stand 31 are separately lifted, the load of the bottomed bucket 21 is not applied when the stand 31 is lifted. Since only the strength required for the stand 31 itself can be obtained, the large stand 31 corresponding to the large bottomed bucket 21 can also be reduced in weight.

  Therefore, in the case of a relatively small bottom expansion bucket, by using the stand shown in the first to third embodiments, the bottom expansion bucket can be transported in a state of being stored in the stand and loaded onto a truck. On the other hand, in the case of a relatively large bottomed bucket, it is not necessary to increase the strength of the stand by using the stand shown in the fourth embodiment, so that the stand can be reduced in size and weight. Therefore, the combined weight of the bottomed bucket and the stand can be extended to a range of weight that can be transported by one truck.

  The present invention is not limited to the above-described embodiments, and the shape and arrangement of the lower frame 32, the upper frame 33, the vertical frame member 34, and the reinforcing member 35, and the outer shape when these are connected are retained. It can set suitably according to conditions, such as a size and weight of a bottom expansion bucket to perform, and can also choose the structure of scaffold member 42 and handrail member 43 suitably. For example, the outer surface holding member 37 is a ring-shaped member, but may be formed by a plurality of arc-shaped members.

  DESCRIPTION OF SYMBOLS 11 ... Earth drill, 12 ... Base machine, 13 ... Boom, 14 ... Sheave, 15 ... Wire rope, 16 ... Swivel joint, 17 ... Kelly bar, 18 ... Arm, 19 ... Kelly bar drive, 20 ... Rotary table, 21 ... Expanded bottom Bucket, 21a ... shaft member, 21b ... opening, 22 ... bottom lid, 23 ... bottom wing, 24 ... locking part, 31 ... stand, 32 ... lower frame, 32a ... outer frame material, 33 ... upper frame, 33a ... Frame material, 33b ... Inner member, 34 ... Vertical frame material, 35 ... Reinforcing material, 36 ... Bottom holding member, 37 ... Outer surface holding member, 38 ... Opening part, 39 ... Upper holding member, 40 ... Falling prevention member, 41 ... Holder, 41a ... Fixed pin, 42 ... Scaffold member, 43 ... Handrail member, 43a ... Fitting cylinder, 43b ... Retaining pin, 43c ... Closing plate, 44 ... Elevating ladder, 44a ... Ladder, 45a ... Front side Top Metal fittings, 45b ... Rear-side upper suspension fittings, 46 ... Lower suspension fittings, 46a ... Rear-side lower suspension fittings, 47 ... Intermediate handrail members, 47a ... Shipping plates, 48 ... Falling prevention members, 49 ... Holders, 50 ... Stop member 51 ... Base member 51a, 51b ... Mounting hole 52 ... Hook 52a ... Hut 52b ... Long hole 53 ... Spindle 54 ... Holding pin 55 ... Locking member 56 ... Base member 56a, 56b ... mounting hole, 57 ... spindle, 58 ... hook, 58a ... collar, 59 ... holding pin, 60 ... fall-preventing member, 61 ... fall-preventing member, 61a ... hinge, 61b ... door member, 61c ... connection Pipe, 62 ... support frame, 63 ... pin, 64 ... connecting piece, 65 ... intermediate holding member, 66 ... locking member, 66a ... spindle, 66b ... hook

Claims (11)

  A stand for a widened bucket that holds a widened bucket that is detachably attached to the tip of a ground drill kelly bar, and includes a lower frame and an upper frame respectively framed by a plurality of frame members, and upper and lower ends of the upper and lower frames. A plurality of vertical frame members joined to each other, and a plurality of suspension fittings, and the lower frame has a lower holding member that holds the bottom surface and the lower outer surface of the expanded bucket, and the upper frame Includes an opening through which the widened bucket provided on one side can pass, an upper holding member for holding the upper outer surface of the widened bucket on the side opposite to the opening, and a working scaffold for attaching / detaching the widened bucket to / from the ground drill A stand for an expanded bottom bucket, comprising: a scaffolding member that is; and a handrail member standing on the outer edge of the scaffolding member.   The stand for a bottom-up bucket according to claim 1, wherein the upper frame includes a detachable fall-preventing member for preventing the bottom-up bucket held in the stand from falling to the opening side.   The stand for a bottom-up bucket according to claim 2, wherein the fall-preventing member is disposed so as to cross the opening end of the opening.   The said lower holding member is equipped with the fall prevention member which can be opened and closed which prevents the fall to the opening part side of the bottom expansion bucket hold | maintained in the stand at the upper part of this lower holding member. Stand for the bottom expansion bucket.   The fall-preventing member is formed of a door member capable of opening and closing the opening, and the door member is formed so as not to protrude outward from the lower frame body and the upper frame body in the opened state. The stand for an expanded bottom bucket according to claim 4.   The suspension fittings have a plurality of upper suspension fittings provided respectively on the opening side and the opposite opening side of the upper frame body or the vertical frame member, and positions corresponding to the upper suspension fittings provided on the opening side. The stand for an expanded bottom bucket according to any one of claims 1 to 5, wherein the stand is a plurality of lower suspension fittings provided at the lower part of the lower frame or the vertical frame member.   The suspension fittings are provided at a plurality of upper suspension fittings provided on the side opposite to the upper opening of the upper frame member or the vertical frame member, and at the lower frame member or the lower part of the vertical frame member at a position corresponding to the upper suspension fitting. The stand for an expanded bucket according to any one of claims 1 to 5, wherein the stand is a plurality of lower suspension brackets.   The upper frame body or the vertical frame member is detachably locked to a locking portion provided at an upper portion of the bottom expansion bucket so that the bottom expansion bucket is prevented from slipping upward from the inside of the bottom expansion bucket stand. The stand for an expanded bottom bucket according to claim 1, further comprising a member.   The stand for a bottom-up bucket according to any one of claims 1 to 8, wherein the scaffold member is formed so as to be capable of being divided inward and outward.   The stand for a widened bucket according to any one of claims 1 to 9, wherein the handrail member is detachably provided on the scaffold member.   The stand for a bottom-up bucket according to any one of claims 1 to 10, wherein a ladder for raising and lowering the scaffold member is integrally provided.

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