JP2011196021A - Crushing head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crushing head for a concrete pile, which is simplified in the device constitution and which can efficiently perform a crushing operation by efficiently moving the soil and pebbles of a ground upward.SOLUTION: This head 1 for crushing a concrete pile 7 includes crushing blades 3 (3a-3e) for crushing the concrete pile 7 by coming into contact with the concrete pile 7, and a cylindrical casing 2 which is integrally connected to the crushing blade 3, rotatingly driven in the same direction as the crushing blade 3, and provided with an inner diameter larger than the outer diameter of the concrete pile 7. A spiral first square steel bar 6 is disposed on the outer peripheral surface of the casing 2 at any inclination angle to the direction perpendicular to the axial direction of the casing 2. A spiral second square steel bar 8 is disposed on the inner peripheral surface of the casing 2 at any inclination angle to the direction perpendicular to the axial direction of the casing 2. Then, the soil and pebbles around the concrete pile 7 can be efficiently discharged upward.

Description

  The present invention relates to a crushing head for crushing a concrete pile.

  As a technique regarding crushing of a concrete pile buried in the ground, techniques shown in Patent Documents 1 and 2 are disclosed. The technique shown in Patent Document 1 crushes the top part of the underground pile with the crushing head while excavating the soil outside the radial direction of the underground pile with the excavation head, and the inner periphery of the casing and the underground pile among the crushing residue The underground pile is crushed while discharging the crushing residual material falling into the annular gap with the outer periphery of the casing from the outlet to the outer peripheral side of the casing. According to such a construction method, the casing provided with the excavation head and the crushing head are integrally configured, and the crushing residual material accumulates in the annular gap despite the fact that these are integrally rotated. Thus, the frictional force between the inner periphery of the casing and the outer periphery of the underground pile impedes the rotation of the processing unit, and it is possible to prevent and prevent the crushing process by the processing unit from becoming impossible and smooth. Highly efficient crushing work is realized.

  In the technique shown in Patent Document 2, an auger machine that moves up and down along a leader rotates a casing that excavates around a pile buried in the ground and an auger screw that crushes the pile in the casing in opposite directions. A locking position and a casing where a plurality of locking claws for gripping the pile are connected to the lower part of the casing, and the locking claws project from the casing side by the claw switching operation means and are locked to the outer peripheral surface of the pile. The pile is crushed by an auger screw, and the pile that remains without being crushed is gripped by a plurality of locking claws and pulled out by the ascending movement of the auger machine. is there.

JP 2008-163552 A JP 2001-3363 A

  However, the technique disclosed in Patent Document 1 has a problem that it is necessary to provide an injection pipe in order to generate a gap outside the casing, and the apparatus configuration becomes complicated. Moreover, although it is set as the structure which raises the excavation soil and the crushing material discharged | emitted by the clearance gap outside a casing to the upper side, since there is no structure for raising them, it is downward by the pressure from a drilling hole wall, etc. However, there is a problem that a sufficient crushing operation cannot be performed.

  In the technique shown in Patent Document 2, since the casing and the auger screw are separate bodies, and it is necessary to control each drive in the reverse rotation, the configuration of the apparatus becomes complicated and the size is increased, and the drive control is also complicated. It has the problem of being done.

  Therefore, the present invention provides a crushing head for a concrete pile that can efficiently perform crushing work by simplifying the configuration of the apparatus and efficiently moving the soil and stone of the ground upward.

  (1) The crushing head disclosed in the present application is a crushing head for crushing a concrete pile, and is arranged to rotate in the same direction with a drive shaft serving as a central axis of rotational drive and a different phase with respect to the drive shaft. A plurality of spiral blades, a crushing blade disposed at the tip of the spiral blade, contacting the concrete pile and crushing the concrete pile, integrally connected to the tip side of the spiral blade, and the spiral blade; Rotating and driving in the same direction, formed of a cylindrical body having an inner diameter larger than the outer diameter of the concrete pile, the casing formed by housing the crushing blade in the cylindrical body, and disposed on the outer peripheral surface of the casing, It comprises a spiral outer rod-like body that is disposed by turning in the same direction as the spiral blade at an arbitrary inclination angle with respect to a direction perpendicular to the axial direction of the casing.

  As described above, in the crushing head disclosed in the present application, the spiral blade and the casing are integrally connected and driven to rotate in the same direction, so that the drive control can be simplified and the rotation by the control can be simplified. The driving force can be efficiently converted into the crushing force of the concrete pile and the propulsion force of the casing, and the crushing operation can be performed efficiently.

  In addition, by providing the outer peripheral surface of the casing with a spiral outer rod-like body that is arranged to be rotated in the same direction as the spiral blade at an arbitrary inclination angle, the casing preceding the crushing blade can be smoothly moved along with the rotational drive. In addition to being able to propel the underground, the soil is moved upward while excavating the soil around the concrete pile, and the concrete pile can be efficiently crushed.

  (2) The crushing head disclosed in the present application is a crushing head for crushing a concrete pile, and is arranged to rotate in the same direction with a drive shaft serving as a central axis of rotational drive and a different phase with respect to the drive shaft. A plurality of spiral blades, a crushing blade disposed at the tip of the spiral blade, contacting the concrete pile and crushing the concrete pile, integrally connected to the tip side of the spiral blade, and the spiral blade; It is rotationally driven in the same direction, is formed of a cylindrical body having an inner diameter larger than the outer diameter of the concrete pile, and is disposed on the inner peripheral surface of the casing, with the casing containing the crushing blade in the cylindrical body, An interior having a spiral diameter larger than the outer diameter of the concrete pile, arranged in a spiral manner in the same direction as the spiral blade at an arbitrary inclination angle with respect to a direction perpendicular to the axial direction of the casing It is characterized in further comprising a Jo body.

  As described above, in the crushing head disclosed in the present application, the inner circumferential surface of the casing is spirally arranged in the same direction as the spiral blade at an arbitrary inclination angle with respect to a direction perpendicular to the axial direction of the casing. In order to provide an internal rod-like body having a spiral diameter larger than the outer diameter of the concrete pile, the soil between the outer peripheral surface of the concrete pile and the inner peripheral surface of the casing can be moved upward to form a space there. It is possible to reduce the pressure from the lateral direction to the concrete pile by the formed space, and the concrete pile can be efficiently crushed.

  (3) The crushing head disclosed in the present application is a crushing head for crushing a concrete pile, and is arranged to rotate in the same direction with a drive shaft serving as a central axis of rotational drive and a different phase with respect to the drive shaft. A plurality of spiral blades, a crushing blade disposed at the tip of the spiral blade, contacting the concrete pile and crushing the concrete pile, integrally connected to the tip side of the spiral blade, and the spiral blade; Rotating and driving in the same direction, formed of a cylindrical body having an inner diameter larger than the outer diameter of the concrete pile, the casing formed by housing the crushing blade in the cylindrical body, and disposed on the outer peripheral surface of the casing, A spiral external rod-like body disposed by turning in the same direction as the spiral blade at an arbitrary inclination angle with respect to a direction perpendicular to the axial direction of the casing, and disposed on an inner peripheral surface of the casing, An internal rod-like body that is disposed by spirally turning in the same direction as the spiral blade at an arbitrary inclination angle with respect to a direction perpendicular to the axial direction of the housing and having a spiral diameter larger than the outer diameter of the concrete pile. It is characterized by comprising.

  As described above, in the crushing head disclosed in the present application, the crushing head is disposed on the outer peripheral surface of the casing, and is arranged by turning in the same direction as the spiral blade at an arbitrary inclination angle with respect to a direction perpendicular to the axial direction of the casing. The spiral outer rod-like body provided and the inner peripheral surface of the casing are spirally swung in the same direction as the spiral blade at an arbitrary inclination angle with respect to the direction perpendicular to the axial direction of the casing. Since the casing is provided with an internal rod-like body having a spiral diameter larger than the outer diameter of the concrete pile, the casing can smoothly push the ground and excavate the soil around the concrete pile. In addition to being able to move up and crush the concrete pile efficiently, the soil between the outer periphery of the concrete pile and the inner periphery of the casing is moved upward to form a space there. Can be, by the space formed by relieving the pressure from the lateral direction to the concrete pile efficiently perform good crushing concrete pile, there is an effect that it is possible to greatly improve the working efficiency.

  (4) The crushing head disclosed in the present application is characterized in that, with respect to the inner rod-shaped body, the arbitrary inclination angle is equal to or smaller than the arbitrary inclination angle of the outer rod-shaped body, and the number of spiral turns is at least one or more. It is what.

  Thus, in the crushing head disclosed in the present application, the arbitrary inclination angle of the inner rod-shaped body is equal to or less than the arbitrary inclination angle of the outer rod-shaped body, and the number of spiral turns is at least one or more. The soil between the outer peripheral surface and the inner peripheral surface of the casing is more reliably moved upward, and the concrete pile can be efficiently crushed.

It is a cross-sectional view and a lower cross-sectional view of the crushing head according to the first embodiment. It is a cross-sectional view and a lower cross-sectional view of the crushing head according to the second embodiment. It is a cross-sectional view and a lower cross-sectional view of the crushing head according to the third embodiment.

  Embodiments of the present invention will be described below. The present invention can be implemented in many different forms. Therefore, the present invention should not be construed based only on the description of the present embodiment. Also, the same reference numerals are given to the same elements throughout the present embodiment.

(First embodiment of the present invention)
The crushing head for a concrete pile according to this embodiment will be described with reference to FIG. FIG. 1 is a cross-sectional view and a bottom view of the crushing head according to the present embodiment. FIG. 1A is a side sectional view of the crushing head, and FIG. 1B is a bottom view of the crushing head.

  The crushing head 1 includes a drive shaft 10 serving as a central axis for rotational drive, two spiral blades 4a and 4b disposed on the drive shaft 10 by turning in the same direction with different phases, and the respective spiral blades. 4 (4a, 4b) disposed at the tip of the crushing blade 3 (3a-3e) for crushing the concrete pile 7 from the upper end, and a position where at least the tip of the crushing blade 3 is completely stored. The cylindrical casing 2 connected to the tip end side of the spiral blade 4, the excavation bit 5 (5 a to 5 c) disposed at the tip end of the casing 2, and the axial direction of the casing 2 on the outer peripheral surface of the casing 2 And a spiral first square steel 6 that has an arbitrary inclination angle with respect to a direction perpendicular to the spiral blade 4 and is disposed by turning in the same direction as the spiral blade 4.

  The spiral blades 4a and 4b are arranged on the drive shaft 10 with phases different from each other by 180 degrees, and a plurality of crushing blades 3 are arranged at predetermined positions and intervals at the tip. Further, a crushing blade 3 c for crushing the central portion of the concrete pile 7 is disposed at a predetermined angle with respect to the axial direction of the drive shaft 10 at the distal end portion of the drive shaft 10.

  The casing 2 is fixed and connected to the side portion at the tip of the spiral blade 4 by welding or the like, and the spiral blade 4 and the casing 2 rotate integrally in the same direction as the drive shaft 10 is driven to rotate. . The inner diameter of the casing 2 is larger than the outer diameter of the concrete pile 7, and the crushing operation is performed with the concrete pile 7 covered from above. Further, since the casing 2 serves as a guide in excavation, at least the tip of the crushing blade 3 is completely accommodated in the casing 2, and the casing 2 is fixedly connected to a position for excavating the ground prior to the crushing blade 3. It is necessary to

  Four excavation bits 5 are arranged at the tip of the casing 2, and when the drive shaft 10 is driven to rotate, the casing 2 precedes the excavation bit 5 while excavating the soil around the concrete pile 7 downward. The crushing blade 3 sequentially carries out crushing work from the top of the concrete pile 7 while propelling into the ground.

  Further, since the spiral first square steel 6 is disposed on the outer peripheral surface of the casing 2, the casing 2 is smoothly propelled downward along with the rotational drive of the drive shaft 10, and the casing 2. The soil and stones on the outer circumference of the casing are discharged to the upper part, and a space is formed around the casing 2. By forming this space, the casing 2 and the concrete pile 7 are not held by the ground, and it is possible to reduce the resistance force from the lateral direction and efficiently perform crushing.

  As shown in FIG. 1B, the first square steel 6 desirably forms a spiral at an angle of 360 degrees or more in the circumferential direction of the casing 2. By doing so, soil and stone can be efficiently moved upward.

(Second embodiment of the present invention)
A concrete pile crushing head according to this embodiment will be described with reference to FIG. FIG. 2 is a cross-sectional view and a bottom view of the crushing head according to the present embodiment. 2A is a side sectional view of the crushing head, and FIG. 2B is a bottom view of the crushing head. The crushing head according to the present embodiment has a spiral shape with an arbitrary inclination angle with respect to a direction perpendicular to the axial direction of the casing on the inner peripheral surface of the casing, and a spiral diameter larger than the outer diameter of the concrete pile. The 2nd square steel which has is arrange | positioned.
In the present embodiment, descriptions overlapping with those in the first embodiment are omitted.

  2, the crushing head 1 includes a drive shaft 10, two spiral blades 4 a and 4 b disposed on the drive shaft 10, and the respective spiral blades 4 (4 a and 4 b). ) Crushing blades 3 (3a to 3e) disposed at the tip of the casing 2, a casing 2 connected to the spiral blade 4, and a drilling bit 5 (5a to 5c) disposed at the tip of the casing 2. Further, a spiral second square steel 8 is provided on the inner peripheral surface of the casing 2 so as to be pivoted in the same direction as the spiral blade 4 at an arbitrary inclination angle with respect to a direction perpendicular to the axial direction of the casing 2. Prepare.

  The second square steel 8 starts from the front end portion of the spiral blade 4, is spirally disposed along the inner periphery of the casing 2, and the end point is the lower end portion of the casing 2. At this time, it is desirable that the second square steel 8 forms a spiral at an angle of 360 degrees or more in the circumferential direction of the casing 2.

  Moreover, the spiral diameter of the second square steel 8 is larger than the outer diameter of the concrete pile 7, the casing 2 covers the concrete pile 7, and the concrete pile 7 and the second square steel 8 are not in contact with each other (in the crushing operation). The casing 2 has a size that can be propelled downward (see FIG. 2B).

  With the casing 2 covering the concrete pile 7, the drive shaft 10 is driven to rotate, so that the casing 2 is pushed downward and is between the inner peripheral surface of the casing 2 and the outer peripheral surface of the concrete pile 7. The soil and stone are discharged upward by the spiral of the second square steel 8 to form a space between the inner peripheral surface of the casing 2 and the outer peripheral surface of the concrete pile 7. Since the space is formed around the concrete pile 7, the concrete pile 7 is not fixed to the ground, the resistance from the lateral direction is lost, and the concrete pile 7 can be easily crushed.

(Third embodiment of the present invention)
The crushing head for a concrete pile according to this embodiment will be described with reference to FIG. FIG. 3 is a cross-sectional view and a bottom view of the crushing head according to the present embodiment. 3A is a side sectional view of the crushing head, and FIG. 3B is a bottom view of the crushing head. In the crushing head according to the present embodiment, a spiral first square steel is disposed on the outer peripheral surface of the casing at an arbitrary inclination angle with respect to a direction perpendicular to the axial direction of the casing, and the inner peripheral surface of the casing. A second square steel having a spiral shape with an arbitrary inclination angle with respect to a direction perpendicular to the axial direction of the casing and having a spiral diameter larger than the outer diameter of the concrete pile is disposed.
In addition, in this embodiment, the description which overlaps with the said 1st and 2nd embodiment is abbreviate | omitted.

  3, the crushing head 1 includes a drive shaft 10, two spiral blades 4 a and 4 b disposed on the drive shaft 10, and the respective spiral blades 4 (4 a and 4 b). ) Crushing blades 3 (3a to 3e) disposed at the tip of the casing 2, a casing 2 connected to the spiral blade 4, and a drilling bit 5 (5a to 5c) disposed at the tip of the casing 2. In addition, the spiral first square steel 6 having an arbitrary inclination angle with respect to the direction perpendicular to the axial direction of the casing 2 on the outer peripheral surface of the casing 2, and the axial direction of the casing 2 on the inner peripheral surface of the casing 2 And a spiral second square steel 8 having an arbitrary inclination angle with respect to the vertical direction. The first square steel 6 and the second square steel 8 are arranged by turning in the same direction as the spiral blade 4.

  The first square steel 6 starts from the upper end of the casing 2, is spirally disposed along the outer periphery of the casing 2, and the end point is the lower end of the casing 2. At this time, it is desirable that the first square steel 6 forms a spiral at an angle of 360 degrees or more in the circumferential direction of the casing 2. Further, the second square steel 8 starts from the vicinity of the tip of the spiral blade 4, is spirally disposed along the inner periphery of the casing 2, and the end point is set to the lower end of the casing 2. At this time, it is desirable that the second square steel 8 forms a spiral at an angle of 360 degrees or more in the circumferential direction of the casing 2.

  While the casing 2 covers the concrete pile 7, the drive shaft 10 is driven to rotate, so that the first square steel 6 and the second square steel 8 facilitate the downward propulsion and the first square steel. 6 discharges soil and stones on the outer periphery of the casing 2 to the upper part, and forms a space around the casing 2. By forming this space, the casing 2 and the concrete pile 7 are not held by the ground, and it is possible to reduce the resistance force from the lateral direction and efficiently perform crushing. At the same time, the second square steel 8 discharges the soil and stone between the inner peripheral surface of the casing 2 and the outer peripheral surface of the concrete pile 7 upward by the spiral of the second square steel 8, and the inner peripheral surface of the casing 2. And a space is formed between the outer peripheral surface of the concrete pile 7. Since the space is formed around the concrete pile 7, the concrete pile 7 is not fixed to the ground, the resistance from the lateral direction is lost, and the concrete pile 7 can be easily crushed.

  As shown in FIG. 3, the inclination angle of the spiral of the second square steel 8 is set to be equal to or less than the inclination angle of the spiral of the first square steel 6, and the number of turns of the spiral is at least one, preferably 2. By doing so, the second square steel 8 can discharge the soil and stone in direct contact with the concrete pile 7 more reliably, and the resistance force from the lateral direction of the concrete pile 7 is eliminated. 7 can be easily crushed.

  In each of the above embodiments, the spiral first square steel 6 and second square steel 8 may be round steel, flat steel, deformed steel or the like as long as they are rod-shaped bodies. Moreover, not only a rod-shaped body but a plate-shaped spiral blade, a scraper, or the like may be used.

  Although the present invention has been described with the above embodiments, the technical scope of the present invention is not limited to the scope described in the embodiments, and various modifications or improvements can be added to these embodiments. .

DESCRIPTION OF SYMBOLS 1 Crushing head 2 Casing 3 (3a-3e) Crushing blade 4 (4a, 4b) Spiral blade 5 (5a-5c) Drilling bit 6 1st square steel 7 Concrete pile 8 2nd square steel 10 Drive shaft

Claims (4)

In the crushing head for crushing concrete piles,
A drive shaft serving as the central axis of rotational drive;
A plurality of spiral blades arranged to rotate in the same direction with different phases on the drive shaft;
A crushing blade disposed at the tip of the spiral blade and contacting the concrete pile to crush the concrete pile;
It is integrally connected to the tip side of the spiral blade, is driven to rotate in the same direction as the spiral blade, is formed of a cylindrical body having an inner diameter larger than the outer diameter of the concrete pile, and the crushing blade is accommodated in the cylindrical body. A casing made of
A spiral outer rod disposed on the outer peripheral surface of the casing and pivoted in the same direction as the spiral blade at an arbitrary inclination angle with respect to a direction perpendicular to the axial direction of the casing. A crushing head characterized by that. In the crushing head for crushing concrete piles,
A drive shaft serving as the central axis of rotational drive;
A plurality of spiral blades arranged to rotate in the same direction with different phases on the drive shaft;
A crushing blade disposed at the tip of the spiral blade and contacting the concrete pile to crush the concrete pile;
It is integrally connected to the tip side of the spiral blade, is driven to rotate in the same direction as the spiral blade, is formed of a cylindrical body having an inner diameter larger than the outer diameter of the concrete pile, and the crushing blade is accommodated in the cylindrical body. A casing made of
Arranged on the inner peripheral surface of the casing, spirally arranged in the same direction as the spiral blade at an arbitrary inclination angle with respect to the direction perpendicular to the axial direction of the casing, A crushing head comprising an internal rod-like body having a spiral diameter larger than the diameter. In the crushing head for crushing concrete piles,
A drive shaft serving as the central axis of rotational drive;
A plurality of spiral blades arranged to rotate in the same direction with different phases on the drive shaft;
A crushing blade disposed at the tip of the spiral blade and contacting the concrete pile to crush the concrete pile;
It is integrally connected to the tip side of the spiral blade, is driven to rotate in the same direction as the spiral blade, is formed of a cylindrical body having an inner diameter larger than the outer diameter of the concrete pile, and the crushing blade is accommodated in the cylindrical body. A casing made of
A spiral outer rod disposed on the outer peripheral surface of the casing and pivoted in the same direction as the spiral blade at an arbitrary inclination angle with respect to a direction perpendicular to the axial direction of the casing;
Arranged on the inner peripheral surface of the casing, spirally arranged in the same direction as the spiral blade at an arbitrary inclination angle with respect to the direction perpendicular to the axial direction of the casing, A crushing head comprising an internal rod-like body having a spiral diameter larger than the diameter. The crushing head according to claim 3,
The crushing head characterized in that the arbitrary inclination angle of the inner rod-shaped body is equal to or smaller than the arbitrary inclination angle of the outer rod-shaped body, and the number of spiral turns is at least one or more.

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