JP2012041674A - Destruction device and destruction and discharge device of precast end-plated concrete hollow pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely break a ring-like iron end plate fixed to an end part of a PC hollow pile and to easily destroy the entire hollow pile.SOLUTION: For a destruction device of a precast end-plated concrete hollow pile, a breaking body A composed by disposing a plurality of roughly vertically extended cutting long blades 11 of a necessary length at equal angle intervals with each other around a rotational shaft having an excavation guide member at a lower end is provided on a position higher than the excavation guide member of the rotational shaft, and the plurality of cutting long blades 11 are disposed roughly in a wedge shape by successively narrowing the horizontal intervals of tips of each other downwards. The tip horizontal interval at the lowermost end in the wedge-shaped cutting long blades 11 is made slightly smaller than an inner diameter of the precast end-plated concrete hollow pile, the tip horizontal interval is successively enlarged upwards, and the tip horizontal interval at the uppermost end is made slightly larger than an outer diameter of the end plate of the precast end-plated concrete hollow pile.

Description

  The present invention relates to a breaking device and a breaking discharge device for a concrete hollow pile with an iron end plate built in the ground.

  Conventionally, as a PC hollow pile breaking and discharging device that breaks a PC hollow pile built in the ground and discharges the crushed debris to the ground, a screw rod is rotatably inserted into the casing, The crushing blade protruding from the bit is fixed, and the upper end of the screw rod is connected to the output shaft of the rotary drive unit supported by the mast so as to be movable up and down. By rotating the screw rod and lowering the rotary crushing blade at the lower end together with the casing to the upper end of the PC hollow pile in the ground, the PC hollow pile is crushed and the crushed waste is moved inside the casing by the screw blades of the screw rod. It is generally known that it is transported upward and then discharged to the ground.

  In general, however, PC hollow piles have steel ring-shaped end plates fixed to both ends of a concrete pile, and both ends of a PC steel rod inserted into the concrete pile are fixed to both ends of the steel pile. The plate becomes a major obstacle to the crushing of the crushing blade of the conventional apparatus, and when crushing is continued as it is, the crushing blade is severely damaged, and therefore the crushing blade must be replaced frequently.

  The first invention of the present application is a concrete hollow with a ready-made end plate that can reliably break the iron end plate of a concrete hollow pile with a ready-made end plate built in the ground, thereby easily destroying the entire concrete hollow pile. The challenge is to provide a pile breaking device,

  In addition to the problem of the first invention, the second invention of the present application is to provide a concrete hollow pile breaking and discharging apparatus with a ready-made end plate that can discharge the crushed debris of the concrete hollow pile with a ready-made end plate to the ground. To do.

As means for solving the above problems, the first invention of the present application is:
A plurality of long cutting blades having a required length extending substantially vertically are arranged at equidistant intervals around the rotary shaft above the drilling guide member of the rotary shaft having a drilling guide member at the lower end. Provided a crushed body,
The plurality of long cutting blades are arranged in a wedge shape with the horizontal interval between the cutting edges being sequentially narrowed downward, and the lowermost cutting edge horizontal interval of the wedge-shaped cutting long blade is set to the value of the concrete hollow pile with end plates. It is slightly smaller than the inner diameter, and the blade edge horizontal interval is gradually increased upward from there, and the blade edge horizontal interval at the uppermost end is slightly larger than the outer diameter of the end plate of the concrete hollow pile with end plates.
Proposed concrete hollow pile breaking equipment with ready-made end plates,

The second invention of the present application is
In claim 1 above,
The excavation guide member is an excavation blade that sends excavated earth and sand and crushed debris upward while excavating the inside of a concrete hollow pile with a ready-made end plate,
The above rotating shaft is a rotating screw shaft that protrudes screw blades on the entire outer peripheral surface of the rotating shaft and conveys and discharges excavated sediment and crushed waste upward.
A concrete hollow pile breaking and discharging device with ready-made end plates is proposed.

  According to the concrete hollow pile breaking device with a ready-made end plate of the first invention of the present application, a plurality of long cutting blades forming a wedge shape of a crushed body are rotated, and the blade at the lowermost end of the blade edge horizontal interval is made the iron end. End cutting is started by lowering to the inner diameter of the plate, and then it is shifted to cutting with the upper blade with the blade edge horizontal interval increasing, and the end plate can be completely cut off with the blade at the upper end with the widest blade edge horizontal interval. Thereafter, when the wedge-shaped crushed material is lowered into the concrete hollow pile, the inside of the concrete hollow pile that is weak against internal pressure can be easily broken by the wedge pressing action from the inside of the wedge-shaped long cutting blade.

  According to the second embodiment of the concrete hollow pile breaking and discharging apparatus with an end plate of the present application, in addition to the effect of the first invention, the inside of the concrete hollow pile with the end plate by the excavation blade at the lower end of the rotary screw shaft as well as the breakage by the crushed body The excavated sediment and crushed debris are sent upward, and the excavated sediment and crushed debris are transported upward by the screw blades of the rotary screw shaft, so that the work efficiency can be improved.

It is a partially omitted front view showing an embodiment of the second invention of the present application. It is the II-II sectional view taken on the line of FIG. It is the III-III sectional view taken on the line of FIG. (A) It is a front view which shows the other example of a crushed body. (B) It is a front view of a slide plate. (A), (b), (c), (d) It is each outline sectional drawing which shows the concrete hollow pile destruction discharge process with a ready-made end plate using the destruction discharge apparatus of the above example.

  The "digging guide member" at the lower end of the rotating shaft in the first invention of the present application is a helix mainly for excavating and discharging inside a cylindrical body, a rod-shaped body, or a hollow pile mainly for steadying and holding a rotating crushed body. Various types of structures such as excavation blades, excavation blades, and combinations thereof are included.

  The “plurality of cutting long blades” means that a minimum of two cutting long blades are arranged symmetrically on the diameter extension line of the rotating shaft, and three cutting long blades are mutually connected on the rotating shaft. Those arranged on three radius extension lines assumed at intervals of 120 degrees, those having four cutting long blades arranged on four radius extension lines assumed at intervals of 90 degrees on the rotation axis, etc. used.

For convenience, an embodiment of the second invention of the present application will be described.
In FIG. 1, a crushed body (A) is mounted on the outer periphery of a hollow crushing rod (1), and a screw blade (3) projects over the entire outer peripheral surface of the hollow rod (2) at the upper end of the crushing rod (1). The screw shaft (4) provided is connected to the same axial center line by a male and female joint (5), and at the lower end of the crushing rod (1), a double spiral blade (7 ) Projecting blades (8) are connected on the same axis line by male and female joints (9).

  The structure of the crushed body (A) is as follows. As shown in FIGS. 1, 2, and 3, right-angled triangular blades (10) and (10) are disposed at the diametrically opposed generatrix positions on the outer peripheral surface of the crushing rod (1), and the hypotenuses are extended in the radial direction. In the state where the right-angled part is located at the upper end of the generatrix and is fixed to the bottom part of the right-angled triangle by welding, a rectangular cross section is provided on each hypotenuse of the blades (10) and (10) thus fixed. The long cutting blades (11) and (11) formed by implanting a long and narrow cutting tip (13) having a square cross section at one corner of the metal bar (12) of the metal bar (12) are rotated in the direction of rotation. Each is fixed in the state of facing.

  The long cutting blades (11) and (11) fixed to the hypotenuses of the blade plates (10) and (10) as described above have a horizontal interval (cutting diameter) between the cutting edges as shown in FIG. Therefore, when only the two long cutting blades (11) and (11) are relatively viewed, a wedge-like arrangement is obtained.

  The horizontal spacing of the lowermost cutting edge of the wedge-shaped long cutting blades (11) and (11) is slightly smaller than the inner diameter of the concrete hollow pile with an end plate to be processed, and the horizontal cutting edge is gradually expanded upward from the lower end. In addition, the horizontal distance at the uppermost edge is slightly larger than the outer diameter of the end plate of the concrete hollow pile with end plate.

  (14) and (14) are right triangle triangular blades similarly fixed to the outer peripheral surface of the rod (1) at an intermediate position between the blade plates (10) and (10). (10) The radius is shorter and shorter.

  (15) is a diamond-shaped reinforcing upper plate fixed to the upper ends of the blades (10), (10), (14), (14) and the outer peripheral surface of the rod (1), and (16) is the blade plate ( 10), (10), (14), rhombus reinforcing intermediate plate fixed to the intermediate portion of rod (1) and the outer peripheral surface of rod (1), (17) is the blade plate (10), (10), (14 ), (14) The lower end of the rod and the rod (1) are fixed to the outer peripheral surface of the rhombus reinforcing lower plate, and the size of each rhombus is sequentially reduced corresponding to the wedge shape.

An example in which the PC concrete hollow pile (P) with an iron end plate (S) is destroyed and discharged using the above-described destruction discharge apparatus will be described.
A mast is held upright at the front end of the base machine, and the upper end of the screw shaft (4) is connected to the output shaft of a rotary drive device that is suspended up and down on the mast. The crushed body (A) at the lower end of (4) is suspended above the PC concrete hollow pile (P) having iron end plates (S) and (S) at both ends.

  The screw shaft (4) is rotated by starting the rotary drive device, the crushed body (A) and the excavation blade (8) are rotated in the same direction, and the excavation blade (8) is rotated as shown in FIG. Drilling into the hollow pile from the upper end of the hollow pile (P), excavating the earth and sand in the hollow pile, then the wedge-shaped cutting long blade (11) of the crushed body (A), the lower end portion (small diameter portion) of (11) The cutting tips (13) and (13) are rotated while being pressed against the inner diameter portion of the iron end plate (S) to start cutting the end plate (S). As the crushed body (A) descends, the wedge-shaped long cutting blades (11) and (11) shift to cutting of the upper part (large diameter part), and the end plate (S )

  After crushing the end plate (S), as shown in (c) and (d), the wedge-shaped cutting long blades (11) and (11) are pushed into the concrete hollow pile, and the concrete hollow pile is weak against internal pressure. Is destroyed and collapsed by the wedge pressing action from the inside.

After the screw shaft (4) reaches the ground, as shown in (c) and (d) in the figure, the rotating screw (3) transports the excavated earth, cutting waste and crushed waste upward and Discharge.
Water, air, etc. are injected from the injection port (n) (see FIG. 1) through the rods (2), (1), (6) in order to facilitate transporting and discharging above the excavated earth, cutting waste and crushed waste. It can also be made.

  In this example, the horizontal interval (cutting diameter) of the cutting edges of the long cutting blades (11a) and (11a) is made expandable / reducible according to the diameter of the PC hollow pile.

  4 (a) and 4 (b), the long cutting blades (11a) and (11a) formed by fixing the cutting tip (13a) to one corner of the metal bar (12a) are blades as shown in FIG. 4 (b). Plates (10a) and (10a) are fixed to the oblique sides of right-angled triangular slide plates (18a) and (18a) having substantially the same shape and dimensions, and horizontal to each of the slide plates (18a) and (18a). Two long and short bolt holes (19a) and (20a) extending in the direction are provided in two upper and lower stages, while each of the blades (10a) and (10a) corresponds to the long hole (19a). Four bolt-through round holes (21a)... And three bolt-through round holes (22a)... Are provided at positions corresponding to the long holes (20a).

  In this example, the slide plates (18a) and (18a) are applied to the side surfaces of the blade plates (10a) and (10a), and the long cutting blades (11a) and (11a) are slightly extended in the radial direction from FIG. In the overhanging state, the bolts (23a) and (23a) passed through the two round holes (21a) and (21a) are passed through the long hole (19a) and also passed through the round hole (22a). The bolts (24a) are passed through the long holes (20a), and nuts are fastened to the bolts. Other structures are substantially the same as those shown in FIGS.

A, Aa Crush body 3 Screw blade 4 Screw shaft 8 Excavation blade 11, 11a Cutting long blade

Claims (2)

A plurality of long cutting blades having a required length extending substantially vertically are arranged at equidistant intervals around the rotary shaft above the drilling guide member of the rotary shaft having a drilling guide member at the lower end. Provided a crushed body,
The plurality of long cutting blades are arranged in a wedge shape with the horizontal interval between the cutting edges being sequentially reduced downward, and the lowest horizontal edge interval of the wedge-shaped cutting long blade is set to a concrete hollow pile with a ready-made end plate. Slightly smaller than the inner diameter of the blade, and the blade edge horizontal spacing was gradually increased upward from there, and the blade edge horizontal spacing at the uppermost end was slightly larger than the outer diameter of the end plate of the concrete hollow pile with a ready-made end plate,
Concrete hollow pile breaking device with ready-made end plates. In claim 1 above,
The excavation guide member is an excavation blade that sends excavated earth and sand and crushed debris upward while excavating the inside of a concrete hollow pile with a ready-made end plate,
The above rotating shaft is a rotating screw shaft that protrudes screw blades on the entire outer peripheral surface of the rotating shaft and conveys and discharges excavated sediment and crushed waste upward.
Concrete hollow pile breaking and discharging device with ready-made end plates.

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