JP4650904B2 - Reel unit mounting device and reel unit mounting method - Google Patents

Description

  The present invention relates to a reel unit mounting apparatus and a mounting method for winding and feeding a hydraulic hose or cable attached to a lower part of a Kelly drive device of an earth drill and connected to a bottom expansion bucket.

  The ground drill uses a crane as a base machine, and the front frame is mounted on the ground drill body or boom so that it can be raised and lowered. The upper frame is rotatably mounted on the top of the front frame, and a kelly drive device is mounted on the upper frame. Insert a kelly bar that hangs down from the top of the boom via a wire rope and swivel joint into the drive hole of the turntable of the kelly drive device so that it can move up and down and cannot rotate relative to it, and attach an earth drill bucket to the lower end of the kelly bar Become. As this earth drill bucket, a shaft expansion bucket or a bottom expansion bucket that can be replaced with a shaft excavation bucket is attached to the lower end of the kelly bar and used for excavation of the bottom expansion portion of the vertical hole.

  Such a widened bucket has an open / close wing for excavation attached to a cylindrical bucket body so that it can be opened and closed by a hydraulic cylinder or the like around the longitudinal axis, and is expanded via a kelly bar rotated by a kelly drive device. The bottom of the vertical hole is excavated in a tapered shape while slowly opening the opening and closing blades. The reason for forming this widened portion is to increase the supporting force of the cast-in-place pile composed of the concrete filled after the vertical hole excavation.

  Such a bottomed bucket includes an actuator such as a hydraulic cylinder for opening and closing the opening and closing blades and a sensor such as a potentiometer for detecting the opening and closing degree of the opening and closing blades. For this reason, a hydraulic hose for connecting the ground hydraulic power source device and the hydraulic cylinder of the bottom expansion bucket, and a cable for connecting the ground electric device and the sensor for the bottom expansion bucket are required. For this reason, it is necessary to attach a reel unit equipped with a reel for winding and feeding a hydraulic hose and a cable to the lower part of the upper frame above the front frame.

  Such a reel unit is detachably attached to the reel unit mounting frame at the lower part of the upper frame with bolts and pins (see Patent Document 1), and is removed from the reel unit mounting frame when the ground drill is transported to the site. Are transported and connected to the reel unit mounting frame on the site with a fixture.

  Conventionally, when a reel unit is mounted on a reel unit mounting frame at the site, the reel unit is placed on the ground, and the ground drill body is moved back and forth, left and right, swiveled, the front frame is turned down, and the reel unit mounting frame of the upper frame Are stacked on the reel unit, and the pin hole or the like of the mounting portion of the reel unit mounting frame is aligned with the pin hole or the like of the mounting bracket of the reel unit, and both are coupled by pins or the like.

JP 2003-120163 A

  In the conventional structure, the ground drill body is moved and turned with the reel unit placed on the ground, the front frame is lowered, and the pin hole of the reel unit is aligned with the pin hole of the reel unit mounting frame. Alignment is very difficult, and it takes time and labor to mount the reel unit.

  SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a reel unit mounting device and a mounting method that can easily mount a reel unit in a short time.

The reel unit mounting device according to claim 1 is a front frame that is mounted in a undulating manner on a front portion of the earth drill body or a boom that is attached to the earth drill body, and a top frame that is rotatably attached to the top of the front frame. A frame, a Kelly drive device attached to the upper frame so as to be movable up and down by an actuator, a reel unit mounting frame provided at a lower portion of the upper frame, and a reel unit mounting frame detachably attached to the reel unit mounting frame In an earth drill equipped with a reel unit,
Brackets provided at a plurality of locations of the Kelly drive device,
Brackets provided at a plurality of locations corresponding to the brackets in the reel unit;
In a state where the kelly drive device is lowered, a bracket provided on the kelly drive device and a bracket provided on the reel unit are detachably connected, and the reel unit is spaced below the reel unit mounting frame. And a connection member for supporting the suspension.
The reel unit is lifted to a position where it can be coupled to the reel unit mounting frame via the connecting member by lifting the Kelly drive device by the actuator.

The reel unit mounting method according to claim 2 is a front frame that is attached to a front part of the earth drill main body or a boom attached to the earth drill main body so that it can be raised and lowered, and a top frame that is rotatably attached to the top of the front frame. A frame, a Kelly drive device attached to the upper frame so as to be movable up and down by an actuator, a reel unit mounting frame provided at a lower portion of the upper frame, and a reel unit mounting frame detachably attached to the reel unit mounting frame In an earth drill equipped with a reel unit,
The reel unit is supported via a connecting member by the kelly drive device in a state where the kelly drive device is lowered,
By lifting the Kelly drive device by the actuator, the reel unit is lifted to a position where it can be coupled to the reel unit mounting frame via the connecting member, and the reel unit is coupled to the reel unit mounting frame by a fixture. It is characterized by doing.

  According to the present invention, since the reel unit is lifted by the connecting member and aligned with the mounting portion of the reel unit mounting frame, alignment by traveling or turning of the ground drill body is unnecessary, and the reel unit mounting of the reel unit is not necessary. Positioning with respect to the frame is easy and the reel unit can be mounted in a short time.

  FIG. 1 is a side view showing an example of an earth drill to which a reel unit attachment device and attachment method of the present invention are applied, FIG. 2 is a partially enlarged view of FIG. 1, and FIG. 3 is a partially enlarged view of FIG. As shown in FIG. 1, the earth drill main body 1 is configured with a crane as a base machine. A revolving body 4 is installed on a crawler type traveling body 2 via a revolving device 3, and a hydraulic power source or A power unit 5 and a cab 6 equipped with a power source are mounted, and a boom 7 is attached by a hydraulic cylinder 8 so as to be able to rise and fall around a pin 7a. In some cases, the boom 7 may be supported by a wire rope that is wound up by a hoisting winch and raised and lowered.

  9 and 10 are hoisting winches mounted on the revolving body 4. A wire rope 16 wound and fed by one hoisting winch 10 is suspended via a sheave 12 at the top of the boom 7, and a swivel joint 13. Is connected to the Keriba 14 via The kelly bar 14 is inserted into a kerry drive device 30 and a reel unit 45, which will be described later, and a shaft digging bucket or an expanded bottom bucket 15 having an opening / closing blade 15a as shown in the figure is detachably coupled to the lower end thereof. The wire rope 11 wound and fed by the other hoisting winch 9 is suspended through a sheave 17 at the top of the boom 7 and used for lifting various tools and materials required for construction.

  The bottom expansion bucket 15 includes a structure that is used in place of a shaft digging bucket (not shown) for the kelly bar 14 and a structure that also uses the bottom expansion bucket 15 as a shaft digging bucket. Reference numeral 28 denotes a vertical hole excavated by the bucket, and reference numeral 28 a denotes an expanded bottom portion excavated by the bottom expanded bucket 15 at the bottom of the vertical hole 28.

  Reference numeral 18 denotes a front frame attached to the swing body 4 so as to be able to undulate around a pin 19. The front frame 18 has a bifurcated base, and is undulated by the expansion and contraction of the left and right hydraulic cylinders 20 provided between the front frame 18 and the boom 7. The front frame 18 is supported by a wire rope wound and fed by a hoisting winch, and the front frame 18 is raised and lowered by converting the expansion and contraction of the hydraulic cylinder into the wire rope winding and feeding. A configuration can also be adopted. The front frame 18 can also adopt a structure in which the front frame 18 is attached to the boom 7 so as to be raised and lowered.

  An upper frame 22 is attached to the top of the front frame 18 so as to be pivotable by a hydraulic cylinder 24 around a pin 23. As shown in FIG. 3 and FIG. 4 which is a front view thereof and FIG. 5 which is a plan view thereof, the upper frame 22 has an upper horizontal frame portion 25 and left and right vertical frame portions 26. A reel unit mounting frame 27 is provided at the lower part.

  A Kelly drive device 30 is attached to the upper frame 22 so as to be movable up and down. Reference numeral 31 denotes a frame of the kelly drive device 30, and the frame 31 has a sliding portion 31 a fitted to guide rails 32 provided on the left and right vertical frame portions 26 of the upper frame 22 so as to be movable up and down. The frame 31 has a built-in rotating plate 29 having a drive hole 29a through which the Kelly bar 14 can be moved up and down and cannot be relatively rotated. Reference numeral 33 denotes a hydraulic motor that rotates the rotating disk 29, and this hydraulic motor 33 is also mounted on the kelly drive device 30.

  A hydraulic cylinder 35 is provided as an actuator for moving the kelly drive device 30 up and down. One hydraulic cylinder 35 is provided on each of the left and right sides, the bottom portion of the upper end is connected to a bracket 36 provided on the vertical frame portion 26 by a pin 37, and the lower end of the piston rod is provided on the frame 31 of the kelly drive device 30. Attached to the bracket 38 by pins 39. Therefore, the kelly drive device 30 can be moved up and down while sliding the sliding portion 31a of the frame 31 on the guide rail 32 as the hydraulic cylinder 35 expands and contracts. The hydraulic cylinder 35 serves to increase excavation efficiency by pressing the excavating blade at the bottom of the bucket against the bottom of the excavating hole via the kelly bar 14 during shaft digging. As an actuator for moving the kelly drive device 30 up and down, an actuator using a motor as a drive source can be used in addition to the hydraulic cylinder.

  A reel unit 45 is attached to the reel unit mounting frame 27. 6 is a side view showing a state before the reel unit 45 is mounted on the reel unit mounting frame 27, FIG. 7 is a front view thereof, and FIG. 8 is a cross-sectional view showing a mounting structure of the reel unit 45 on the reel unit mounting frame 27 FIG. The open / close blade 15a of the bottom expansion bucket 15 shown in FIG. 1 can be opened and closed by a hydraulic cylinder. The reel unit 45 includes a turntable 48 and a center joint 49.

  Two hose reels 46 and 46 and one cable reel 47 are mounted on the turntable 48. The hose reel 46 winds and feeds a hydraulic hose (not shown) for supplying hydraulic oil to a hydraulic cylinder (not shown) for opening and closing the opening / closing blade 15a, and a constant tension is applied to the hydraulic hose. A constant torque motor for applying The cable reel 47 winds and feeds a cable (not shown) connected to a sensor such as a potentiometer that detects the stroke of the opening / closing hydraulic cylinder in order to detect the opening / closing degree of the opening / closing blade 15a. A constant torque motor for applying a constant tension to the cable is provided. The turntable 48 includes a lower plate 48a on which the hose reel 46 and the cable reel 47 are mounted, a central vertical frame portion 48b, and an upper plate 48c.

  The center joint 49 includes a cylindrical non-rotating outer cylinder and an inner cylinder that is rotatably fitted in the outer cylinder. The center joint 49 is provided to rotate a hydraulic hose, a cable, and the like between the bottom expansion bucket 15 and the turntable 48 together with the cable during the bottom expansion operation. The center joint 49 constitutes a rotary oil passage for supplying hydraulic oil to a hydraulic cylinder that opens and closes the opening / closing blade 15a via a hydraulic hose wound around the hose reel 46. The upper plate 48 c of the turntable 48 is coupled to an inner cylinder that is a rotating part of the center joint 49. Only when the widened bucket 15 is used for the widened excavation work, the rotational force of the rotating part of the kelly drive device 30 is transmitted to the turntable 48 between the rotating part and the turntable 47 so that the turntable 48 is rotated. There is a case where a clutch for controlling whether or not is provided.

  As shown in FIG. 8, the reel unit mounting frame 27 has a donut shape having an opening 27a through which the kelly bar 14 is inserted. That is, the reel unit mounting frame 27 is formed by welding a bottom plate 27b, inner and outer side plates 27c and 27d, and a top plate (not shown) to form a hollow inside, and the bottom plate 27b has a non-joint of the center joint 49 of the reel unit 45. There are openings 27e through which the mounting brackets 50 are provided so as to protrude upward at three locations on the upper surface of the rotating portion. In addition, sleeves 52 and 53 into which pins 51 that are fixing tools for attaching the reel unit 45 are inserted are fixed to the portions of the inner and outer side plates 27c and 27d corresponding to the opening 27e of the bottom plate 27b by welding. The bracket 50 on the reel unit 45 side also has a boss 54 for inserting the pin 51. The kelly bar 7 is configured by fitting a plurality of divided kelly bars having different cross-sectional sizes so that they can be expanded and contracted and not telescopically rotated, but the kelly bar 14 shown in FIG. Only the outermost split Keriba is shown.

  Brackets 55 for supporting the reel unit 45 are attached to the frame 31 of the kelly drive device 30 at a plurality of locations (two locations on the left and right in the present embodiment) using welding or bolts. The bracket 55 of this example has a pin hole in a vertical plate. On the other hand, the bracket 56 is attached to the side surface of the center joint 49 at the top of the reel unit 45 at a position corresponding to the bracket 55 by welding or using a bolt. The bracket 56 of this example also has a pin hole in the vertical plate. Reference numeral 57 denotes a connection member for connecting the brackets 55 and 56. The connection member 57 is a member having flexibility as shown in the drawing or the upper, lower, left and right sides for easy alignment with the reel unit mounting frame 27. A structure that can be displaced in the direction is preferable. The connecting member 57 in this example includes a wire 60 having upper and lower ring-shaped portions 58 and 59 and shackles 61 and 62 coupled to the respective ring-shaped portions 58 and 59.

  In this earth drill, when transporting, the reel unit 45 is transported separately from the reel unit mounting frame 27 integral with the upper frame 22 and assembled on site. When assembling, the reel unit 45 is placed on the ground, and the reel unit mounting frame 27 is positioned on the reel unit 45 by running and turning the ground drill body 1 with the boom 7 and the front frame 18 attached. Approximate alignment is possible, and the hydraulic cylinder 20 is extended to position the reel unit mounting frame 27 on the reel unit 45. The hydraulic cylinder 35 that moves the kelly drive device 30 up and down is extended to set the kelly drive device 30 at the lowest position.

  6 and 7, the pin 61a of the shackle 61 is inserted into and coupled to the pin hole of the bracket 55 provided in the frame 31 of the kelly drive device 30, and the pin of the bracket 56 of the reel unit 45 is also connected. The pin hole 62a of the shackle 62 is inserted into the hole and coupled. In this case, the reel unit 45 and the reel unit mounting frame are configured so that the connection by the connecting member 57 is possible even in the state where the space between the reel unit mounting frame 27 and the reel unit 45 is generated. Even if there is a slight misalignment with the terminal 27, it can be easily connected. After the connection, the hydraulic cylinder 20 is contracted and the front frame 18 is lifted together with the upper frame 22 and the kelly drive device 30 to float the reel unit 45 in the air.

  Next, the upper frame 22 is brought into a vertical posture by adjusting the degree of expansion / contraction of the hydraulic cylinder 24. Thereafter, the hydraulic cylinder 35 that moves the kelly drive device 30 up and down is contracted. Due to the contraction of the hydraulic cylinder 35, the reel unit 45 is lifted together with the kelly drive device 30 with respect to the reel unit mounting frame 27, and the bracket 50 of the reel unit 45 is inserted from the opening 27 e of the bottom plate 27 b of the reel unit mounting frame 27. The boss 54 of the bracket 50 is inserted between sleeves 52, 53 provided on the side plates 27c, 27d of the reel unit mounting frame 27. In this state, the operator inserts the pin 51 into the sleeves 52 and 53 and the boss 54, and inserts the retaining pin 63 into the pin hole provided in the radial direction in the sleeve 53 and the pin 51 to prevent the removal. The reel unit 45 is attached to the reel unit mounting frame 27. Here, since the connection member 57 of this embodiment connects the reel unit mounting frame 37 and the reel unit 45 so as to be relatively displaceable in the vertical direction and the horizontal direction, the connection member 57 is provided between the sleeves 52 and 53 and the boss 54. Even if there is a slight misalignment, the operator can apply a force to the reel unit 45 to perform alignment so that the pin holes of the sleeves 52 and 53 and the boss 54 are aligned.

  As described above, in this embodiment, the reel unit 45 is connected to the kelly drive device 30 by the connecting member 57, and the kelly drive device 30 is moved upward to lift and lift the reel unit 45 together with the kelly drive device 30. Since the positioning is performed on the mounting portion of the reel unit mounting frame 27 in a state where the reel unit 45 is mounted, the positioning of the reel unit 45 with respect to the reel unit mounting frame 27 is easier than when positioning the main unit by running or turning. The reel unit 45 can be attached in a short time.

  The present invention is not limited to the above embodiment, and various modifications and additions can be made without departing from the scope of the present invention. For example, the connecting member 57 is not limited to a wire, and a belt or a chain can be used. Further, the brackets 55 and 56 may be formed in a hook shape, a hook or the like may be used instead of the shackle 61, or a wire may be directly hung. Further, if a guide portion for guiding the bracket 50 at the top of the reel unit 45 between the sleeves 52 and 53 is provided, the alignment of the reel unit 45 to the reel unit mounting frame 27 is further facilitated. Further, as a fixture for attaching the reel unit 45 to the reel unit attachment frame 27, a bolt, a bolt, or a nut can be used. Further, the present invention can be applied to a device in which the cable reel 47 is not mounted on the turntable 48.

It is a side view which shows an example of the earth drill to which the attachment apparatus and attachment method of the reel unit of this invention are applied. It is the elements on larger scale of FIG. FIG. 3 is a partially enlarged view of FIG. 2. FIG. 4 is a front view of FIG. 3. FIG. 4 is a plan view of FIG. 3. It is a side view which shows the state which has attached the reel unit using the attachment apparatus of this Embodiment. FIG. 7 is a front view of FIG. 6. It is a cross-sectional view showing a coupling structure between the reel unit mounting frame and the reel unit of the present embodiment.

Explanation of symbols

1: ground drill body, 2: traveling body, 3: swiveling device, 4: swiveling body, 5: power unit, 6: cab, 7: boom, 8: hydraulic cylinder, 9, 10: hoisting winch, 11, 16 : Wire rope, 12, 17: sheave, 13: swivel joint, 14: kelly bar, 15: bottom expansion bucket, 15a: open / close blade, 18: front frame, 20: hydraulic cylinder, 22: upper frame, 24: hydraulic cylinder, 25 : Upper horizontal frame portion, 26: Vertical frame portion, 27: Reel unit mounting frame, 27a: Opening portion, 27b: Bottom plate, 27c, 27d: Side plate, 27e: Opening portion, 30: Kelly drive device, 31: Frame, 31a : Sliding part, 32: guide rail, 33: hydraulic motor, 35: hydraulic cylinder, 36: bracket, 38: bracket, 37, 39: pin, 45: reel unit, 6: Hose reel, 47: Cable reel, 48: Turntable, 48a: Lower plate of turntable, 48b: Vertical frame portion of turntable, 48c: Upper plate of turntable, 49: Center joint, 50: Bracket, 51: Pin, 52, 53: Sleeve, 54: Boss, 55, 56: Bracket, 57: Connection member, 58, 59: Ring-shaped part, 60: Wire, 61, 62: Shackle, 61a, 62a: Pin

Claims (2)

A front frame that can be raised and lowered on the front part of the earth drill body or a boom attached to the earth drill body, an upper frame that is pivotally attached to the top of the front frame, and an actuator that moves up and down on the upper frame In an earth drill comprising a kelly drive device movably mounted, a reel unit mounting frame provided at a lower portion of the upper frame, and a reel unit detachably mounted to the reel unit mounting frame by a fixing tool,
Brackets provided at a plurality of locations of the Kelly drive device,
Brackets provided at a plurality of locations corresponding to the brackets in the reel unit;
In a state where the kelly drive device is lowered, a bracket provided on the kelly drive device and a bracket provided on the reel unit are detachably connected, and the reel unit is spaced below the reel unit mounting frame. And a connection member for supporting the suspension.
A reel unit mounting apparatus having a configuration in which the reel unit is lifted to a position where it can be coupled to the reel unit mounting frame via the connecting member by lifting the Kelly drive apparatus by the actuator. A front frame that can be raised and lowered on the front part of the earth drill body or a boom attached to the earth drill body, an upper frame that is pivotally attached to the top of the front frame, and an actuator that moves up and down on the upper frame In an earth drill comprising a kelly drive device movably mounted, a reel unit mounting frame provided at a lower portion of the upper frame, and a reel unit detachably mounted to the reel unit mounting frame by a fixing tool,
The reel unit is supported via a connecting member by the kelly drive device in a state where the kelly drive device is lowered,
By lifting the Kelly drive device by the actuator, the reel unit is lifted to a position where it can be coupled to the reel unit mounting frame via the connecting member, and the reel unit is coupled to the reel unit mounting frame by a fixture. A reel unit mounting method characterized by:

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