JP6116619B2 - Pile head processing equipment - Google Patents

Description

  The present invention relates to a pile head processing apparatus for removing excess pile heads of cast-in-place concrete piles.

  A cast-in-place concrete pile is constructed by placing concrete in a pile hole in which a reinforcing steel cage is built. When concrete is poured into a pile hole, defective concrete mixed with excavated earth and sand, stable liquid, etc. is piled up on top of the concrete. For this reason, when placing concrete, ready-mixed concrete is placed in the pile hole so as to be above the set pile top end. Therefore, when placing concrete, a surplus is formed above the top of the pile head and the surplus constitutes a part of the pile head.

  If the surplus is removed after the ready-mixed concrete is hardened, there will be a problem that not only will the lifting work take days, but noise and dust will be generated. In view of this, a method has been developed in which after the ready-mixed concrete is placed, the surplus formed on the upper side of the pile head at the top of the pile is hardened and the surplus is removed. Patent Document 1 describes a pile head processing method in which an extra pile head is sucked by a vacuum hose. Patent Document 2 describes a method for treating a pile head in which a surplus before curing is scraped off and removed by a processing bucket whose bottom plate can be opened and closed.

JP 2009-287193 A JP 2007-291632 A

  As described in Patent Document 1, in the pile head processing method in which the surplus is sucked by the vacuum hose, not only the suction takes time, but the surplus sucked into the tank of the vacuum car is hardened. Before long, it is necessary to drain the tank and clean the tank and vacuum hose. Furthermore, there is a limit to the work capacity of the method of sucking extra power. On the other hand, as described in Patent Document 2, in the method of scraping off the surplus with the bucket, it is difficult to insert the surplus into the bucket evenly.

  The objective of this invention is improving the workability | operativity of the removal process of the surplus at the time of placement of a concrete pile.

  The pile head processing apparatus of the present invention is a pile head processing apparatus for removing the pile head piles of cast-in-place concrete piles before hardening, and inclined upward at an obtuse angle from the center to the outer periphery. A conical plate, an annular plate integrally provided on the outer periphery of the conical plate, a removal bucket provided with a connecting portion that protrudes and is fixed to the annular plate above the annular plate; A drive socket mounted on a vertically moving rod to be pressed against the heap, a support pin fixed to the drive socket and penetrating the connecting portion and supporting the removal bucket in a tiltable manner by the connecting portion; And a vibrator for supplying the extra bank into the removal bucket when the removal bucket is pressed against the extra bank, and the extra pin supplied into the removal bucket is inserted into the support pin. The removal bucket is tilted to the so as to discharge to the outside.

  The pile head processing apparatus of the present invention is a pile head processing apparatus that removes extra pile heads of cast-in-place concrete piles before hardening, and is inclined upward at an acute angle from the center toward the outer periphery. A first conical plate, and a pushing bucket that is pushed into the surplus, a second conical plate that is inserted into the first conical plate, and an outer periphery of an upper end of the second conical plate. A meshing portion that meshes with the pushing bucket, and a removal bucket that includes an upper end portion of the second conical plate that protrudes upward from the second conical plate and is attached to the pushing bucket. When the removal bucket is pressed against the surplus via the pushing bucket by vibrating the surplus support rod supported by the connecting portion so as to be tiltable to a vertically moving rod that presses against the surplus via The extra And vibrator supplies the serial removal the bucket has, the surplus Sheng supplied into the removed bucket, and to discharge to the outside by tilting the removal bucket around the support pin.

  In a pile head processing apparatus including a removal bucket having a conical plate inclined at an obtuse angle, a raised portion is formed on the outer side in the radial direction of the removal bucket by pressing the removal bucket against the buildup. The raised portion is supplied into the removal bucket by a vibrator. By raising the removal bucket, the surplus in the removal bucket can be discharged to the outside.

  In a pile head processing apparatus comprising a removal bucket having a conical plate inclined at an acute angle and a pushing bucket into which the removing bucket is inserted, by pressing the pushing bucket combined with the removing bucket against the surplus, A surging raised portion is formed radially outward of the removal bucket. The raised portion is supplied into the removal bucket by a vibrator. By separating the removal bucket from the pushing bucket and raising it, the surplus can be discharged to the outside.

  In the pile head processing device, the surplus is supplied to the removal bucket by a vibrator, so that the removal bucket can be surplus in a short time just by pushing the removal bucket into the surplus so as to form a raised portion. It can be pushed in, and the surging process, that is, the pile head process can be performed quickly. The surplus supplied in the removal bucket can be quickly discharged by tilting after the removal bucket is moved up. Thereby, the workability | operativity of the removal operation | work of a surplus can be improved.

(A)-(F) is process drawing which shows the construction procedure of a cast-in-place concrete pile. It is sectional drawing which shows the pile head of the cast-in-place concrete pile constructed | assembled, and shows the state in which the surplus remains on the upper side of a pile top end. It is a perspective view which shows the removal bucket which comprises the pile head processing apparatus which is an example. FIG. 4 is a bottom view of FIG. 3. (A) is a front view which shows the removal bucket in the state lifted, (B) is a front view which shows the removal bucket in the state pressed against the surplus. It is a front view which shows the removal bucket in the state tilted when discharging the surplus supplied in the removal bucket. It is sectional drawing which shows the pile head in the state which removes the surplus using the removal bucket shown in FIGS. It is the AA line top view in FIG. It is sectional drawing which shows the pile head in the state which finished the removal process of extra embankment and smoothed the pile head top end surface. It is a perspective view which shows the pushing bucket which comprises the pile head processing apparatus which is another example. It is a perspective view which shows the removal bucket combined with the pushing bucket shown in FIG. It is sectional drawing which shows the state which combined the removal bucket with the inside of the pushing bucket. It is sectional drawing which shows the pile head in the state which removes surplus using a pushing bucket and a removal bucket. It is sectional drawing which shows the pile head in the state which isolate | separated the removal bucket from the pushing bucket, and has raised it with the kelly bar. (A) is sectional drawing which shows the removal bucket raised by Keriba, (B) is sectional drawing which shows the state which inclined the removal bucket.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. When building a structure such as a reinforced concrete building, a cast-in-place concrete pile is built in the ground, and the foundation of the lowest layer of the building is fixed to the pile head. When building a building with an underground structure, the foundation of the lowest layer of the underground structure is fixed to the head of the cast-in-place concrete pile.

  As shown in FIG. 1, in order to construct a cast-in-place concrete pile in the ground, a pile hole is dug down from the ground surface GL. In the place where the cast-in-place concrete pile is constructed, as shown in FIG. 1 (A), the rotary bucket 12a is driven by the rotating shaft of the earth drill, that is, the kelly bar 11, and the preceding excavation is performed. As shown in FIG. 1B, a cylindrical surface layer casing 13 is built in the pile hole that has been excavated in advance. Further, as shown in FIG. 1C, the shaft portion of the pile hole is excavated by the rotating bucket 12b, and the shaft portion is excavated to the solid ground F through the formation ground G. Next, as shown in FIG. 1 (D), the bottom-up rotary bucket 12c is rotated by the kelly bar 11 to excavate the bottom-up portion whose inner diameter increases toward the bottom surface in the strong ground F. When excavating the shaft portion and the bottom expanded portion by the rotating buckets 12b and 12c, bentonite liquid suitable for the soil quality of the formation ground G is injected into the pile hole by the pipe 14 as the stable liquid L. In FIG. 1, a part of the formation ground G is omitted. Moreover, although the clearance gap is formed between the surface layer casing 13 and the pile hole, the clearance gap is abbreviate | omitting illustration.

  When the expanded bottom portion is excavated, after the hole bottom processing and bottom roughness processing of the pile hole are performed, the reinforcing steel cage S is built in the pile hole as shown in FIG. Next, as shown in FIG. 1 (F), the tremy tube 15 is inserted into the pile hole. While the ready-mixed concrete C is injected from the bottom side of the pile hole by the tremy pipe 15, the stabilizing liquid L is discharged to the outside by the drain pump 16. At the time of placing the ready-mixed concrete C, the upper surface of the ready-mixed concrete C rises by injecting ready-mixed concrete C from the tremy pipe 15 into the pile hole. The lower end discharge port of the tremy tube 15 is moved upward so that the upper surface of the ready-mixed concrete C has a predetermined height from the lower end discharge port of the tremy tube 15. The ready-mixed concrete C is cast up to the upper part of the pile hole, and the cast-in-place concrete pile is constructed by the reinforcing bar cage S and the ready-mixed concrete C. Many cast-in-place concrete piles are constructed according to the scale of the building.

  FIG. 2 is a cross-sectional view showing the upper end portion of the cast-in-place pile constructed as described above. When the ready-mixed concrete C is laid, the surplus D is formed on the upper side of the designed pile top end T as described above. The surplus D is a defective concrete formed by mixing the slime at the bottom of the pile, the fresh concrete C at the head of the pile, and the stabilizing liquid when placing the ready concrete C from the bottom to the top of the pile hole. is there. That is, when ready-mixed concrete C is placed in the pile hole, a surplus D is formed on the upper side of the pile top end T, and the pile head of the cast-in-place concrete pile is in a state where the surplus D is accumulated. For this reason, the amount of ready-mixed concrete C including a surplus D of a predetermined depth is placed so that the pile top end T made only of ready-made concrete C not including defective concrete is positioned as designed. The surplus D is solidified if left untreated, but is defective concrete and needs to be removed. In order to remove the surplus D from the pile head before its hardening, a pile head processing device is used.

  3-6 is a perspective view which shows the removal bucket which comprises the pile head processing apparatus which is an example. As shown in FIGS. 3 and 5, the removal bucket 20 includes a conical plate 21 inclined upward from the central portion toward the outer peripheral portion, and an annular plate 22 provided integrally with the outer peripheral portion of the conical plate 21. Have. A flange portion 23 is integrally provided on the outer peripheral portion of the annular plate 22, and the flange portion 23 is inclined upward toward the outside. Two connecting plates 24 are fixed inside the annular plate 22, and each connecting plate 24 extends in the radial direction and is integrated with a base portion 25 fixed to the annular plate 22 and a central portion of the base portion 25. And a connecting portion 26 protruding upward from the annular plate 22. In the removal bucket 20, a space for accommodating the surplus D is formed inside the conical plate 21 and the annular plate 22, and when the surplus D is accommodated in the space, the connecting portion 26 is more than the surplus D. Projects upward.

  As shown in FIG. 5 (A), the conical plate 21 has an obtuse angle θ and is inclined upward at an obtuse angle from the central part toward the outer peripheral part. The inclination angle θ of the conical plate 21 shown, that is, the conical angle is about 160 degrees. However, this angle θ is not limited to 160 degrees, and can be set to any angle depending on the cast-in-place concrete pile diameter as long as it is an obtuse angle.

  As shown in FIG. 5, a drive socket 28 is attached to the distal end portion 11 a of the kelly bar 11 as a vertically moving rod by a connecting pin 27. The drive socket 28 has a quadrangular cross-sectional shape, and the lower end portion of the drive socket 28 is mounted between the two connecting portions 26. The removal bucket 20 is supported by the connecting portion 26 so as to be tiltable with respect to the drive socket 28, that is, tilted and rotated. A support pin 31 is fixed to the lower end portion of the drive socket 28, and the support pin 31 penetrates through the vertical slit 32 formed in the connecting portion 26 so as to extend in the vertical direction. Yes. As a result, the support pin 31 is guided so as to be movable in the vertical direction along the vertical slit 32, and the removal bucket 20 is supported by the support pin 31 so as to be tiltable with respect to the drive socket 28. A lateral slit 33 that communicates with the upper end of the longitudinal slit 32 and extends in a transverse direction across the longitudinal slit 32 is provided in the connecting portion 26. A guide pin 34 is fixed to the drive socket 28 so as to be positioned above the support pin 31. The horizontal slit 33 is provided with an engagement recess 35 so as to face the vertical slit 32, and the guide pin 34 is engaged, that is, caught by the engagement recess 35. The horizontal slit 33 has an arc shape.

  As shown in FIG. 5A, the distance A between the engagement recess 35 and the lower end of the vertical slit 32 is longer than the distance B between the lower surface of the support pin 31 and the upper surface of the guide pin 34. Is set. As shown in FIG. 5 (A), the guide pin 34 engages with the engagement recess 35 and is removed by the guide pin 34 under the state where the removal bucket 20 is suspended by the kelly bar 11 as the vertically moving rod. Bucket 20 is supported. At this time, the support pin 31 enters the vertical slit 32, and the removal bucket 20 is supported in a horizontal state without tilting. Thus, if the engagement recessed part 35 is provided in the horizontal slit 33, the removal bucket 20 of the suspended state can be supported stably compared with the form which does not provide this.

  As shown in FIG. 5B, when the removal bucket 20 is pressed excessively by the kelly bar 11, the support pin 31 and the guide pin 34 enter the vertical slit 32, and the removal bucket 20 is inclined in the direction in which it is inclined. Even when an external force is applied, the removal bucket 20 maintains a predetermined posture.

  On the other hand, as shown in FIG. 5 (A), when a large external force is applied in a direction in which the removal bucket 20 is inclined while the removal bucket 20 is suspended by the kelly bar 11, the guide pin 34 is engaged. The removal bucket 20 can be tilted around the support pin 31 by being detached from the recess 35. FIG. 6 shows a state where the removal bucket 20 is tilted in this way. The position of the tilt limit of the removal bucket 20 is regulated by the guide pin 34 coming into contact with the end of the lateral slit 33. If the horizontal slit 33 is provided to extend to the left and right sides in FIG. 5 with respect to the vertical slit 32, the removal bucket 20 can be tilted in either the left or right direction. When the horizontal slit 33 has a shape extending only to one side of the vertical slit 32, the removal bucket 20 is tilted only to one side.

  As shown in FIG. 5A, the vertical direction and the horizontal direction in this specification indicate the vertical, horizontal, and horizontal directions when the removal bucket 20 is suspended by the kelly bar 11.

  As shown in FIGS. 4 and 5, a plurality of posture stabilizing fins 36 project downward from the outer surface of the conical plate 21. Each posture stabilizing fin 36 extends in the radial direction from the center side portion of the conical plate 21 to the outside of the flange portion 23. In the illustrated case, eight posture stabilizing fins 36 are provided at intervals of 45 degrees in the circumferential direction. Of the eight posture stabilizing fins 36, two posture stabilizing fins 36 that are parallel to the connecting plate 24 are provided with through holes 37 as shown in FIG. When 38a is engaged with one of the through holes 37, the removal bucket 20 can be tilted about the support pin 31 by the wire 38 as shown in FIG.

  The annular plate 22 shown in FIG. 5 is parallel to the axial direction, but may have a tapered shape in which the diameter of the upper portion is larger than the diameter of the lower end portion connected to the conical plate 21.

  FIG. 7 is a cross-sectional view showing a pile head in a state where the extra-bank D is removed using the removal bucket 20 shown in FIGS. 3 to 6, and FIG. 8 is a plan view taken along line AA in FIG. 7. FIG.

  Next, with reference to FIG. 7 and FIG. 8, the procedure for removing the surplus D before curing will be described. When removing the surplus D, as shown in FIG. 7, the surface casing 13 is pulled up to the position of the surplus sky.

  In order to remove the surplus D, the removal bucket 20 is attached to the kelly bar 11 and the conical plate 21 of the removal bucket 20 is pressed against the surplus D. Since the posture stabilizing fins 36 are provided on the outer surface of the conical plate 21, the removal bucket 20 is not tilted and is bitten into the extra-bank D while maintaining a constant posture. When the removal bucket 20 is pressed against the surplus D, the drive socket 28 fixed to the kelly bar 11 moves downward with respect to the removal bucket 20, so that the support pin 31 and the guide pin 34 are viewed from the position of FIG. The guide pin 34 enters the longitudinal slit 32 after moving to the position 5 (B). As a result, the support pin 31 and the guide pin 34 enter the vertical slit 32, the tilt of the removal bucket 20 is prevented, and the removal bucket 20 is held in a constant posture.

  When the removal bucket 20 is pressed against the surplus D, as shown in FIG. 7, the upper end of the surplus D is pressed outward in the radial direction inside the surface casing 13. As a result, the raised portion E rises outward in the radial direction of the removal bucket 20. A vibrator 39 is disposed between the surface casing 13 and the reinforcing steel basket S. The removal bucket 20 is pressed against the surplus D, and the vibrator 39 is inserted into the raised portion E. As the vibrator 39, a high frequency vibrator having an outer diameter of a rod-shaped vibrating body of 30 to 60 mm is used. When the raised portion E is vibrated by the vibrating body, the raised portion E is supplied to the inside of the removal bucket 20. The vibrator 39 vibrates the vibrating body at the surface portion of the raised portion E as much as possible. In order to prevent the quality of the concrete from being separated, the vibrating body should not be used excessively and should not be deeper than the bottom of the removal bucket 20.

  When surplus D is supplied into the removal bucket 20, the removal bucket 20 is moved upward. After the removal bucket 20 containing the surplus D is moved up and further moved horizontally to the discharge position, a hook 38a is hooked on the through hole 37 of the removal bucket 20 as shown in FIG. The removal bucket 20 is tilted around the support pin 31 by the wire 38. Thereby, the surplus D is discharged from the removal bucket 20.

  As shown in FIG. 7, in a state where the removal bucket 20 is pressed against the surplus D, a step of supplying surplus D into the removal bucket 20 by the vibrator 39, and the surplus D By repeating the step of discharging from the removal bucket 20 a plurality of times, the surplus D remaining on the upper portion of the pile head top end surface T can be generally removed to the outside.

  When the stabilization liquid L remains on the upper side of the surplus D before starting the removal operation of the surplus D, the removal bucket 20 is pushed down so that the removal bucket 20 is immersed in the stabilization liquid L, and the removal bucket A stabilizing liquid L is supplied into 20. When the stable liquid L flows into the removal bucket 20, the removal bucket 20 is raised and the stable liquid L is discharged to the outside. Since the conical plate 21 and the annular plate 22 are integrated in the removal bucket 20, the removal of the stable liquid L can be performed by the removal bucket 20 without causing dripping from the removal bucket 20 during discharge.

  Since the exposed pile head top end face T is not flat when the surplus D is removed, a ladder R is attached to the surface casing 13 as shown in FIG. Finish T flatly. FIG. 9 shows a state in which the surplus D is removed by the removal bucket 20 and the pile head top end face T is finished. In FIG. 8 and FIG. 9, only two of the many vertical reinforcing bars constituting the reinforcing bar cage S are shown, and the other vertical reinforcing bars are not shown.

  The removal bucket 20 has a strong structure in which the conical plate 21 and the annular plate 22 are integrated. Thus, since the removal bucket 20 has an integral structure, the durability of the removal bucket 20 can be improved. The conical plate 21 has a conical surface inclined at an obtuse angle. When the removal bucket 20 is pressed against the surplus D, a raised portion E is formed by the surplus D that is pushed outward in the radial direction of the removal bucket 20. The raised portion E is supplied into the removal bucket 20 by the vibrator 39.

  When the removal bucket 20 is pressed against the surplus D, the support pin 31 and the guide pin 34 are engaged with the vertical slit 32, so that the removal bucket 20 is kept in a constant posture without tilting the removal bucket 20, and the surplus D Can be pressed against. On the other hand, when discharging the surplus D in the removal bucket 20, the removal bucket 20 can be tilted around the support pin 31, so that the surplus D can be discharged from the removal bucket 20 by a simple tilting operation. it can. Since the support pin 31 is provided at a position above the removal bucket 20, the surplus D supplied into the removal bucket 20 is prevented from adhering to the support pin 31 and the vertical slit 32.

  Thus, in the pile head processing apparatus mentioned above, since the surplus D is supplied to the removal bucket 20 by the vibrator 39, the removal bucket 20 is pushed into the surplus D so as to form the rising portion E. The removal bucket 20 can be pushed into the surplus D in a short time, and the pile head processing can be performed quickly. The surplus D supplied into the removal bucket 20 can be quickly discharged by tilting after the removal bucket 20 is moved up. Thereby, the workability | operativity of the removal processing work of the surplus D can be improved.

FIG. 10 is a perspective view showing a pushing bucket constituting a pile head processing apparatus as another example.
FIG. 11 is a perspective view showing a removal bucket combined with the pushing bucket shown in FIG. 10. FIG. 12 is a cross-sectional view showing a state in which the pushing bucket and the removal bucket are combined.

  The pile head processing apparatus shown in FIGS. 10 to 12 includes a pushing bucket 41 and a removing bucket 42 inserted into the pushing bucket 41, and removes the excess D before curing. The pushing bucket 41 includes a first conical plate 43 that is inclined upward at an acute angle from the central portion toward the outer peripheral portion, and an annular plate 44 that is integrally provided on the outer peripheral portion of the conical plate 43. Three support brackets 45 are fixed to the outer peripheral surface of the annular plate 44 at intervals in the circumferential direction, and a connection piece 47 fixed to the lower end portion of the suspension rod 46 is connected to each support bracket 45. 48 is connected to be tiltable. As shown in FIG. 12, the conical plate 43 has a conical shape with an acute inclination angle θ, and the inclination angle θ, that is, the conical angle is about 35 degrees. However, this angle θ is not limited to about 35 degrees, and if it is an acute angle, it can be set to an arbitrary angle depending on the cast-in-place concrete pile diameter.

  A plurality of posture stabilizing fins 49 are provided on the outer surface of the conical plate 43 so as to protrude outward. Each posture stabilizing fin 49 extends from the lower end of the conical plate 43 to an intermediate position in the vertical direction and is provided on the bottom side of the conical plate 43. In the illustrated case, four posture stabilizing fins 49 are provided at intervals of 90 degrees in the circumferential direction. Three first meshing portions 51 are provided on the outer peripheral portion of the annular plate 44 at intervals in the circumferential direction. Each engagement portion 51 includes an engagement piece 52 that protrudes outward in the radial direction and extends in the circumferential direction, and a stopper piece 53 that extends to one end portion in the circumferential direction of the engagement piece 52 and extends in the vertical direction. Yes.

  The removal bucket 42 has a second conical plate 54 that is inserted into the conical plate 43 of the pushing bucket 41 with a gap. A flange 55 is integrally provided on the outer peripheral portion of the conical plate 54. As shown in FIG. 12, the flange 55 is inclined upward toward the outside. When the removal bucket 42 is inserted into the pushing bucket 41, the opening of the pushing bucket 41 is covered by the flange 55. The conical plate 54 has a conical shape with an obtuse angle similar to the conical plate 43 of the pushing bucket 41.

  Three second meshing portions 56 are provided on the outer periphery of the upper end portion of the flange 55 so as to correspond to the first meshing portion 51 and spaced in the circumferential direction. Each meshing portion 56 has a bent piece 58 that protrudes downward from the outer peripheral portion of the flange 55, and the bent piece 58 is provided with an engagement piece 59 that meshes with the engagement piece 52 of the first meshing portion 51. ing. The engagement piece 59 projects radially inward from the lower end of the bent piece 58, and an engagement space 61 is formed between the engagement piece 59 and the flange 55. Therefore, when the removal bucket 42 is inserted into the pushing bucket 41 that is the outer bucket and the inner removal bucket 42 is rotated, the engagement piece 52 of the pushing bucket 41 enters the engagement space 61 of the removal bucket 42. Thus, the pushing bucket 41 and the removing bucket 42 are combined. The rotation of the removal bucket 42 is restricted by the engagement piece 59 coming into contact with the stopper piece 53. A target 57 is provided on the flange 55. The target 57 serves as a mark for smoothly rotating the removal bucket 42 with respect to the pushing bucket 41.

  Two connecting plates 62 are fixed in the upper end portion of the conical plate 54, and each connecting plate 62 extends in the radial direction and is fixed to the conical plate 54 and a central portion of the base 63. And a connecting portion 64 protruding upward from the removal bucket 42. As shown in FIG. 11, a connecting portion 64 is attached to the tip end portion 11 a of the kelly bar 11 as the vertically moving rod by a support pin 65. In the removal bucket 42, a space for accommodating the surplus D is formed inside the conical plate 54. When the surplus D is accommodated in the space, the connecting portion 64 is connected to the surplus D as in the removal bucket 20. Projecting upward.

  A plurality of posture stabilizing fins 66 are provided on the outer surface of the conical plate 54 so as to protrude outward. Each posture stabilizing fin 66 extends from the lower end of the conical plate 54 to an intermediate position in the vertical direction and is provided on the bottom side of the conical plate 54. In the case shown in the drawing, the posture stabilizing fins 66 are provided at intervals of 90 degrees in the plate circumferential direction, similarly to the posture stabilizing fins 49. Of the posture stabilizing fins 66, the posture stabilizing fins 66 at positions corresponding to the connecting plates 62 are provided with through holes 68 as shown in FIG.

  As shown in FIG. 12, an auxiliary bucket 67 is arranged between the pushing bucket 41 that becomes the outside when combined and the removal bucket 42 that becomes the inside. The auxiliary bucket 67 is incorporated between the bottom of the conical plate 43 and the bottom of the conical plate 54.

  FIG. 13 is a cross-sectional view showing the pile head in a state in which the extra-banking is removed using the pushing bucket and the removing bucket, and FIG. 14 shows the removing bucket 42 separated from the pushing bucket 41 by the kelly bar 11. It is sectional drawing which shows the pile head in the state made to raise.

  Next, with reference to FIG. 13 and FIG.

  In order to remove the surplus D, as shown in FIG. 13, the removal bucket 42 is attached to the kelly bar 11, and the removal bucket 42 and the auxiliary bucket 67 are combined inside the pushing bucket 41. The pushing bucket 41 is pressed against the extra-bank D through the bucket 42. Since the pushing bucket 41 has an acute conical surface, when the front end portion, that is, the lower end portion of the pushing bucket 41 is pressed against the radial center position of the surplus D, the pushing bucket 41 is removed by the kelly bar 11 via the removal bucket 42. Pushed into prime D. The pushing bucket 41 is pushed into the extra-bank D while maintaining a predetermined posture without being inclined. Since the posture stabilizing fins 49 are provided on the outer surface of the conical plate 43, coupled with the fact that the pushing bucket 41 has an acute angle, the pushing bucket 41 does not tilt, while maintaining a predetermined posture. Pushed into prime D.

  The removal bucket 42 is supported by the support pin 65 so as to be tiltable to the tip end portion 11 a of the kelly bar 11. As shown in FIGS. 11 and 12, a constraining plate 69 is attached to the connecting portion 64, and the removal bucket 42 can be tilted counterclockwise around the support pin 65 as indicated by an arrow U. If it is tilted in the clockwise direction that is the opposite direction to the direction of the arrow U, the restraint plate 69 abuts against the tip of the kelly bar 11 and the tilt of the removal bucket 42 in this direction is restricted. That is, the removal bucket 42 tilts in one direction around the support pin 65. Thereby, when the removal bucket 42 is inserted into the pushing bucket 41, the removal bucket 42 can be prevented from shaking.

  Although the guide pin 34 shown in FIG. 5 is not provided in the removal bucket 42, the pushing bucket 41 is pushed into the surplus D while maintaining the posture by making the pushing bucket 41 have an acute angle. However, similarly to the case shown in FIG. 5, the connecting portion 64 is provided with the vertical slit 32 and the horizontal slit 33, and the support pin 31 penetrating the vertical slit 32 and the guide pin 34 penetrating the horizontal slit 33 are provided. Alternatively, a drive socket may be provided in the connecting portion 64.

  When the pushing bucket 41 is pressed against the surplus D through the removal bucket 42, the upper end of the surplus D is pressed toward the radially outer side in the surface casing 13 as shown in FIG. 13. As a result, the raised portion E rises outward in the radial direction of the pushing bucket 41. A vibrator 39 is arranged between the surface casing 13 and the reinforcing steel basket S, and when the pushing bucket 41 is pressed against the surplus D, the vibrator 39 is buried in the raised portion E. As the vibrator 39, a high-frequency vibrator is used similarly to those shown in FIGS. When the raised portion E is vibrated by the vibrating body, the raised portion E is supplied to the inside of the removal bucket 42. At this time, since the upper end opening of the pushing bucket 41 is covered with the flange 55, the surplus D is prevented from entering the inside of the pushing bucket 41. The pushing bucket 41 is fixed to the surface casing 13 by fixing the upper end portion of the suspension rod 46 to the surface casing 13 by the clamp member 71.

  When the surplus D is supplied into the removal bucket 42, the removal bucket 42 is moved up. At this time, the removal bucket 42 is rotated by the kelly bar 11 to release the engagement between the first engagement portion 51 of the pushing bucket 41 and the second engagement portion 56 of the removal bucket 42. Under the state where the pushing bucket 41 is fixed to the surface casing 13 by the hanging rod 46, the removal bucket 42 is moved upward. As shown in FIG. 15 (A), after the removal bucket 42 is raised, the surplus D is horizontally moved to the discharge position, and as shown in FIG. 15 (B), in the through hole 68 of the removal bucket 42. The hook 38 a is hooked, and the removal bucket 42 is tilted about the support pin 65 by the wire 38. Thereby, the surplus D is discharged from the removal bucket 42.

  The removal bucket 42 from which the surplus D has been discharged is inserted again into the pushing bucket 41, and the pushing bucket 41 is pushed into the remaining surplus D through the removal bucket 42 by the kelly bar 11. Before the removal bucket 42 is inserted into the pushing bucket 41, if the surplus D enters the pushing bucket 41, the surplus D enters the auxiliary bucket 67. Therefore, when the auxiliary bucket 67 is taken out from the inside of the pushing bucket 41 with a wire, the surplus D that has entered the auxiliary bucket 67 can be discharged to the outside. Thus, when the removal bucket 42 is inserted into the pushing bucket 41, the removal bucket 42 is reliably inserted into the pushing bucket 41 in a state in which the surplus D does not enter the pushing bucket 41. be able to. Before the removal bucket 42 is inserted into the pushing bucket 41, the auxiliary bucket 67 is reset.

  In this way, the removal bucket 42 is inserted into the pushing bucket 41, and both buckets are pushed into the surplus D by the kelly bar 11 in a state where both buckets are combined by the meshing portions 51 and 56. At this time, the suspension rod 46 can move the suspension rod 46 downward with respect to the clamp member 71 by loosening the clamp member 71 provided on the surface casing 13.

  As shown in FIG. 13, with both buckets pressed against the surplus D, the vibrator 39 supplies the surplus D into the inner bucket, that is, the removal bucket 42, and the removal bucket 42 is raised. By repeating the step of discharging the surplus D from the removal bucket 42 a plurality of times, the surplus D remaining on the top of the pile head top end surface T can be removed to the outside.

  This pile head processing apparatus has the pushing bucket 41 pushed into the extra-banking D, and the removal bucket 42 inserted in the inside. Therefore, it is possible to discharge the surplus D supplied into the removal bucket 42 to the outside while leaving the push bucket 41 in the surplus D, while the push bucket 41 is gradually lowered and moved intermittently. Thereby, it can discharge | emit in the state which does not disturb the extra pile D of a pile head.

  When the stabilization liquid L remains on the upper side of the surplus D before starting the removal operation of the surplus D, the removal bucket 42 is pushed down and removed so that only the removal bucket 42 is immersed in the stabilization liquid L. A stabilizing liquid L is supplied into the bucket 42. When the removal bucket 42 is soaked in the stabilizing liquid L, when the removal bucket 42 is pushed into the surplus D, the posture stabilizing fins 66 are bitten into the surplus D, so that the removal bucket 42 is kept in a predetermined posture. It can be pushed into the prime D. When the stabilization liquid L flows into the removal bucket 42, the removal bucket 42 is raised by the kelly bar 11 and the stabilization liquid L is discharged to the outside. Since the conical plate 54 and the flange 55 are integrated in the removal bucket 42, the stable liquid L can also be removed by the removal bucket 42 without causing dripping from the removal bucket 42 during discharge.

  Since the exposed pile head top end surface T is not flat when the surplus D is removed, a ladder R is attached to the surface casing 13 as shown in FIG. Finish processing. FIG. 9 shows a state where the surplus D is removed by the pushing bucket 41 and the removal bucket 42 and the pile head top end face T is finished.

  The pushing bucket 41 has a strong structure having an acute angle conical plate 43. Therefore, when the acute-angle conical plate 43 is pressed against the surplus D, the push bucket 41 pushes the surplus D outward in the radial direction of the push bucket 41 to form a raised portion E on the surplus D. The raised portion E is supplied into the removal bucket 42 by the vibrator 39. The pushing bucket 41 has a structure in which a conical plate 43 and an annular plate 44 are integrated, and the removal bucket 42 has a structure in which a conical plate 54 and a flange 55 are integrated. Each bucket is strong and durable. Can be improved.

  When the pushing bucket 41 is pressed against the surplus D, since the pushing bucket 41 has an acute angle, the pushing bucket 41 can be pressed against the surplus D while maintaining a certain posture without inclining the pushing bucket 41. On the other hand, when discharging the surplus D in the removal bucket 42, the removal bucket 42 can be tilted around the support pin 31. Therefore, the surplus D can be discharged from the removal bucket 42 by a simple tilting operation. it can. Since the support pin 31 is provided at a position above the removal bucket 42, the surplus D supplied in the removal bucket 42 is prevented from adhering to the support pin 31.

  Thus, also in the pile head processing apparatus shown in FIGS. 10-15, since the surplus D is supplied to the removal bucket 42 by the vibrator 39, the removal bucket 42 is formed so as to form the rising portion E. Is simply pushed into the surplus D, the removal bucket 42 can be pushed into the surplus D in a short time, and pile head processing can be performed quickly. The surplus D supplied into the removal bucket 42 can be quickly discharged by tilting the removal bucket 42 after moving it upward. Thereby, the workability | operativity of the removal processing work of the surplus D can be improved.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

13 Surface casing 20 Removal bucket 21 Conical plate 22 Annular plate 23 Flange portion 24 Connection plate 26 Connection portion 27 Connection pin 28 Drive socket 31 Support pin 32 Vertical slit 33 Horizontal slit 34 Guide pin 35 Engaging recess 36 Attitude stabilization fin 39 Vibrator 41 Push bucket 42 Removal bucket 43 First conical plate 44 Annular plate 45 Support bracket 46 Suspension rod 47 Connecting piece 48 Connecting pin 49 Posture stabilizing fin 51 First engagement portion 52 Engaging piece 53 Stopper piece 54 Second conical plate 55 Flange 56 Second engagement portion 57 Target 58 Bending piece 59 Engagement piece 61 Engagement space 62 Connection plate 63 Base portion 64 Connection portion 65 Support pin 66 Posture stabilization fin 67 Auxiliary bucket 68 Through hole

Claims (7)

A pile head processing device that removes extra pile heads of cast-in-place concrete piles before hardening,
A conical plate inclined upward at an obtuse angle from the central portion toward the outer peripheral portion, an annular plate integrally provided on the outer peripheral portion of the conical plate, and a connection that protrudes and is fixed to the annular plate above the annular plate A removal bucket with a section;
A drive socket attached to a vertical movement rod that presses the removal bucket against the surplus,
A support pin fixed to the drive socket, penetrating the connecting portion and supporting the removal bucket in a tiltable manner at the connecting portion;
A vibrator that vibrates the surplus and supplies the surplus into the removal bucket when the removal bucket is pressed against the surplus;
The pile head processing apparatus which tilted the said removal bucket centering on the said support pin, and discharged | emitted the said surplus supplied in the said removal bucket outside. In the pile head processing apparatus according to claim 1,
A vertical slit that guides the support pin so as to be movable in the vertical direction, and a horizontal slit that communicates with the upper end of the vertical slit and extends in a direction crossing the vertical slit are formed in the connecting portion,
The drive socket is provided with a guide pin that engages with the connecting portion when the removal bucket is pressed against the extra bank and that is guided by the lateral slit when the removal bucket is tilted about the support pin. , Pile head processing equipment.   3. The pile head processing apparatus according to claim 2, wherein an engagement recess with which the guide pin engages is provided in the horizontal slit under a state in which the removal bucket is suspended by the vertical movement rod. .   The pile head processing apparatus of any one of Claims 1-3 WHEREIN: When the said removal bucket is pressed on the said surplus, the attitude | position stabilization fin which bites into the surplus is protruded below on the outer surface of the said conical board. Pile head processing equipment. A pile head processing device that removes extra pile heads of cast-in-place concrete piles before hardening,
A first conical plate inclined at an acute angle upward from the central portion toward the outer peripheral portion, and a pushing bucket to be pushed into the surplus,
A second conical plate inserted into the first conical plate, a meshing portion provided on an outer periphery of an upper end portion of the second conical plate and meshing with the pushing bucket, and an upper end portion of the second conical plate A removal bucket provided with a connecting portion attached to protrude above the second conical plate,
A support pin that supports the connecting portion so as to be freely tiltable to a vertically moving rod that presses the removal bucket against the surplus via the pushing bucket;
A vibrator that vibrates the surplus and supplies the surplus into the removal bucket when the removal bucket is pressed against the surplus via the pushing bucket;
The pile head processing apparatus which tilted the said removal bucket centering on the said support pin, and discharged | emitted the said surplus supplied in the said removal bucket outside.   6. The pile head processing apparatus according to claim 5, further comprising an auxiliary bucket mounted between the pushing bucket and the removal bucket, wherein the surplus that has entered the auxiliary bucket when the removal bucket is removed from the pushing bucket. The pile head processing apparatus which discharges a pile outside by the said auxiliary bucket. The pile head processing apparatus according to claim 5 or 6, wherein a plurality of first engaging portions extending in a circumferential direction are provided at an upper end portion of the pushing bucket, and an upper end portion of the removal bucket is engaged with the first engaging portion. By providing a plurality of second meshing portions and rotating the removal bucket with respect to the pushing bucket, the first meshing portion and the second meshing portion are meshed with each other to push the pushing bucket and the removal bucket. Pile head processing device that connects with

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