JP5646891B2 - Stirrer used for ground improvement equipment - Google Patents

Description

  The present invention is a stirring device used in a ground improvement device or the like, comprising a frame-shaped intermediate stirring blade and a frame-shaped outer stirring blade having a larger stirring diameter than the intermediate stirring blade at least outside the intermediate stirring blade. The present invention relates to a multi-layer agitator that projects wings inwardly and outwardly from at least a concentric position.

  Conventionally, as this kind of agitation device, a drilling blade is provided at the lower end of a double shaft in which an inner shaft and an outer shaft are rotatably fitted in opposite directions, and a semicircular bar-shaped inner stirring blade above the upper shaft, A semicircular bar-shaped intermediate stirring blade having a larger stirring diameter than the inner stirring blade, and a semicircular bar-shaped outer stirring blade having a larger stirring diameter than the intermediate stirring blade are provided in a triple state in a concentric position. A structure in which the intermediate stirring blade is fixed to the inner shaft and rotated in the forward direction, and the intermediate stirring blade is fixed to the outer shaft and rotated in the reverse direction as a common rotation prevention blade is known.

  However, in the above-described conventional stirring device, the inner shaft and the outer shaft are rotated in opposite directions to each other, so that the rotation driving device for transmitting the rotation to both shafts has a disadvantage that it is complicated and large. In addition, the above-mentioned triple agitating blade performs effective stirring and mixing as a whole. It is said that there is a tendency that a part of earth and sand flows to rotate in the opposite direction, and that part of the earth and sand may be left behind from the entire stirring and mixing.

  Further, in the conventional stirring device, the stirring diameter interval between the forward stirring outer stirring blade and the intermediate stirring blade that rotates the inside reversely, and the inner stirring blade that rotates forward, and the outer stirring blade are reversed. Since the stirring diameter interval between the rotating intermediate stirring blades is fixed at a fixed interval, for example, when the above-mentioned stirring diameter interval is too wide although the earth and sand are weak, the wing cutting action against the earth and sand is weak, For this reason, when the size of the earth and sand cannot be reduced, or the agitation diameter interval is narrow even though the mass of the earth is large or hard, troubles such as the sediment cannot adhere to the agitation blade without passing through the interval occur. It was.

The invention of the present application realizes simplification of the rotary drive device that transmits the rotation to the inner shaft and the outer shaft, and in the conventional device, the flow of a part of earth and sand that is going to rotate in the forward direction and the rotational movement in the opposite direction. It is an object of the present invention to provide a stirring device capable of sufficiently stirring and mixing a part of the earth and sand to be stirred.

Further, the present invention provides an agitation device that makes it possible to appropriately change and adjust the agitation diameter interval between the intermediate agitation blade and the inner and outer agitation blades according to the properties of the earth and sand to be excavated and agitated. It is an issue to provide.

As means for solving the problems, the first invention of the present application is configured such that the inner shaft (2) to which rotation is transmitted is rotatably inserted into the outer shaft (3) to form a double shaft (1), and the inner shaft (2) In the double shaft (1) formed by rotatably connecting the outer shaft (3) , the excavation blade (7) is fixed to the lower end of the inner shaft (2) , and the inner stirring blade (12) The frame-shaped intermediate stirring blade (13) having a larger stirring diameter than the inner stirring blade (12) and the frame-shaped outer stirring blade (19) having a larger stirring diameter than the intermediate stirring blade (13) are concentrically arranged. A triple stirring blade (A) that is positioned and overlapped in the radial direction is configured, and the inner stirring blade (12) and the outer stirring blade (19) are fixed to the inner shaft (2 ) , and the inner shaft (2 ) to connect the rotary drive (24) for transmitting the one-way rotated, the intermediate agitating blade (13) is fixed to the outer shaft (3), Kigaijiku (3) was constructed to forward and reverse reciprocal rotation by the swing drive system, which provides a stirring device ground improvement device.
As a means for solving the problems, the second invention of the present application is configured such that the inner stirring blade (12) is configured by fixing a base portion of a linear rod-shaped body protruding radially on the inner shaft (2), and the intermediate stirring blade ( 13) is a rod-shaped rectangular frame having a larger stirring diameter than the inner stirring blade (12), and the upper and lower sides of the rectangular frame are positioned on both upper and lower sides of the inner stirring blade (12), and the upper side of the rectangular frame is positioned on the outer shaft ( 3), the lower side of the rectangular frame shape is rotatably attached to the inner shaft (2), and the outer stirring blade (19) is rod-shaped and has a stirring diameter larger than that of the intermediate stirring blade (13). The upper and lower sides of the large rectangular frame are positioned on both the upper and lower sides of the intermediate stirring blade (13), and the upper side of the rectangular frame is rotatably attached to the outer shaft (3). Is fixed to the inner shaft (2) above, and the vertical direction that connects the upper and lower sides of the rectangular frame is radial. The base of the straight rod-like body which projects inwardly and fixed, and the linear rod-like body of the outer agitation blades (19) is constructed by arranging the upper and lower sides of the linear rod members of the intermediate agitating blade (13), soil improvement A stirring device such as a device is provided.

In the third invention of the present application, the intermediate agitating blade (13) is prepared in a plurality of types with different agitating diameter intervals between the outer agitating blade (19) and detachably attached to the outer shaft (3). We propose an agitation device such as a ground improvement device that can be selectively attached to the ground.

According to the agitation device such as the ground improvement device of the first invention of the present application and the second invention of the present application, the rotation drive device for transmitting the rotation to the inner shaft may be a simple structure for uniaxial rotation, and intermediate agitation. Since the blade is reciprocated by a predetermined angle by the swing drive device, the flow of earth and sand pushed by the intermediate agitating blade is disrupted to dissipate the earth and sand in multiple directions, and the diffused earth and sand are pushed by the outer agitating blade. It collides violently with the flow of earth and sand that is going to rotate and breaks the flow, and these together cause disturbance mixing in the whole earth and sand.

According to the stirrer such as the ground improvement device of the third invention of the present application, in addition to the effects of the first and second inventions , before the work, the soil property of the ground is investigated, and based on this, a plurality of types of intermediate stirrer are provided. If you select one of the blades that has a stirring diameter interval suitable for the nature of the earth and sand, and detachably attach it to a predetermined position on the outer shaft for excavating and stirring the ground, the intermediate stirring blade and the outer stirring blade Effective stirring can be performed with an appropriate stirring diameter interval.

It is a side view of the ground improvement apparatus provided with the stirring apparatus of the 1st invention of this application. (A) It is the enlarged plan view which looked at the rocking | swiveling rotation drive apparatus from the cross section of FIG. 1A-A. (B) It is a partially vertical enlarged side view of the above. It is an enlarged side view of a triple stirring blade part. (A) It is an BB expanded sectional view of FIG. (B) It is a CC line expanded sectional view same as the above. It is each front view of the multiple types of intermediate | middle stirring blade from which the stirring diameter space | interval by 2nd invention of this application differs widely and narrowly.

  The “stirring blade” in the first and second inventions of the present application can be formed in various frame shapes such as a rectangle, a trapezoid, a semicircular arc, and an arc shape. In addition, the “plurality of intermediate stirring blades” in the second invention of the present application may be provided with protrusions or holes of various shapes on the blade surfaces.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In FIG. 2, a double shaft (1) is a shaft in which an inner shaft (2) longitudinally passed through a solidified liquid supply channel (4) is rotatably inserted into a hollow outer shaft (3). Then, a hollow head rod (5) is further connected to the lower end of the outer shaft (3) via a flange joint (6), and the inner shaft (2) is rotatably passed through the head rod (5). The head rod (5) protrudes downward, and a drilling rod (8) having drilling blades (7), (7) is connected to the lower end of the projection via a flange joint (9). In this example, a triple stirring blade (A) is provided above 7). (29) is a solidified liquid discharge port provided in the excavation rod.

  The structure of the triple stirring blade (A) is as follows. A pair of split ring halves (10), (10) are fitted on the inner shaft (2) between the lower end of the head rod (5) and the flange joint (9), and a bolt nut (11) The non-rotatable joints are used to fix the straight inner ring stirring blades (12) and (12) to the outer peripheral surfaces of the joining ring halves (10) and (10) by welding in a radially protruding state. It is.

  The intermediate stirring blades (13) and (13) are rectangular rods having a stirring diameter larger than that of the inner stirring blades (12) and (12). Two split ring halves (15) are respectively fixed to the lower end, and the upper end connecting pieces (14) and (14) are formed in a projecting manner on the outer peripheral surface of the lower end of the head rod (5). The support plates (16) and (16) are detachably connected to each other by bolts and nuts (17), and the split ring halves (15) and (15) at the lower end are connected to the inner shaft (2). It fits and is joined to the bolts and nuts (18) in a rotatable and detachable manner.

  The outer stirring blades (19) and (19) are rectangular rods having a larger stirring diameter than the intermediate stirring blades (13) and (13), and the lower ends thereof are connected to the flange (9) at the lower end of the inner shaft (2). The upper end of the ring is fixed to the outer peripheral surface of the ring (20) that is rotatably fitted to the head rod (5).

  In order to use the triple stirring blade (A) as described above in the ground improvement device, as an example, as shown in FIG. 1, two masts (22) vertically supported at the front end of the crawler (21) are used. The guide rails (23) and (23) support a rotational drive unit carrier (25) on which a rotational drive device (24) composed of a motor and a speed reducer is mounted so as to be slidable up and down, and a top sheave (26). The wire rope (27) suspended from the suspension is suspended so as to be able to move up and down, and the output shaft (28) of the rotary drive device (24) projects downward.

  On the other hand, as shown in FIGS. 2 (a) and 2 (b), the swing drive carrier (30) is slid on the guide rails (23) and (23) in the same manner below the rotation drive carrier (25). A short cylindrical auxiliary shaft (33) is rotated via ball bearings (32) and (32) in a short cylindrical bearing (31) provided at the tip of the carrier (30). The auxiliary shaft (33) is supported in such a manner that the lower end portion of the output shaft (28) is supported concentrically and freely through ball bearings (34) and (34). The upper end of the outer shaft (3) is fixed to the lower end of the outer shaft (3) with bolts (35), and the upper end of the inner shaft (2) is fixed to the lower end of the output shaft (28) with a male and female joint (28 '). Connect and insert the retaining pin, the outer shaft supported in this way (3) Swing drive device for transmitting a predetermined angle back and forth rotation is equipped.

  At the upper end of the auxiliary shaft (33), as shown in FIG. 2 (a), an oscillating plate (36) extending from the annular central plate in the diametrical direction as shown in FIG. (38)... And brackets (39) and (39) project from the left and right rear portions of the carrier (30), and hydraulic cylinders (40) and (40) are mounted on both brackets (39) and (39). The tip of the piston rods (41) and (41) of both cylinders are pin-coupled to the tips of the arms (37) and (37) of the swing plate (36). is there. If the swinging plate (36) is reciprocally rotated by a fixed angle by alternately driving the advancing drive of one cylinder (40) and the retreating drive of the other cylinder (40), the outer shaft (3) and the middle of its tip The agitating blades (13) and (13) perform the same reciprocating rotation.

  In the ground improvement device of FIG. 1, when the rotation driving device (24) is started, rotation is transmitted from the output shaft (28) to the inner shaft (2), and along with the excavating blades (7) and (7), the inside and outside The stirring blades (12), (12), (19) and (19) rotate in the forward direction. Loosen the wire rope (27), lower the inner shaft (2) and the outer shaft (3) together with the rotation drive part carrier (25) and the swing drive part carrier (30), and the rotating excavation blades (7), ( 7) Start excavation in the ground.

  At the same time, the hydraulic cylinders (40), (40) of the swing drive device are alternately driven forward and backward by small angles to rotate the outer shaft (3) reciprocally by small angles, so that the intermediate stirring blades (13), (13) Is reciprocally rotated in the same manner, between the two flows of the inner earth and sand that are rotated by the inner and outer stirring blades (12), (12), (19), and (19) that are rotated forward and the outer earth and sand. The intermediate agitating blades (13) and (13) reciprocally rotate in the forward and reverse directions, so that the middle agitating blades (13) and (13) first disintegrate the flow of the earth and sand to dissipate the earth and sand in multiple directions. Colliding with the flow of earth and sand by the inner and outer stirring blades (12), (12), (19) and (19) and breaking the flow, these together combine to perform the entire disturbance and mixing.

  This example is an example in which a spare intermediate stirring blade is prepared so that the stirring diameter interval between the intermediate stirring blade and the stirring blades adjacent to both the inside and outside of the intermediate stirring blade can be changed to an appropriate interval corresponding to the properties of the earth and sand. .

  The intermediate stirring blades (13) and (13) in FIG. 3 have the widest stirring diameter intervals between the inner and outer stirring blades (12), (12), (19) and (19). As shown in FIG. 5, the stirring blades (13), (13), (13 b), (13 c) (b) are narrower than the stirring blades (13), (13). Three pairs of intermediate stirring blades are prepared. These spare intermediate stirring blades (13a) (13a), (13b), (13b), (13c), (13c) are made of a metal plate formed in a rectangular frame shape in this example, Removable connecting pieces (14a), (14b), and (14c) are fixed to the two support plates (16) and (16) by bolts and nuts (17), respectively. The half ring halves (15a), (15b) and (15c) to be joined in a ring shape are fixed by nuts (18).

  Before use, investigate the soil properties of the ground to be improved. Next, based on the above investigation results, an intermediate stirring blade having an optimal stirring diameter interval is selected from the example of FIG. 5 and replaced. Thereby, the wing cutting action and mixing of the earth and sand according to the properties of the earth and sand can be performed.

DESCRIPTION OF SYMBOLS 1 Double shaft 2 Inner shaft 3 Outer shaft 7 Excavation blade 13 Intermediate stirring blade 19 Outer stirring blade A Triple stirring blade 24 Rotation drive device 36 Oscillation plate 40 Hydraulic cylinder 13a, 13b, 13c Reserve intermediate stirring blade

Claims (3)

The inner shaft (2) to which the rotation is transmitted is rotatably inserted into the outer shaft (3) to form a double shaft (1), and the inner shaft (2) and the outer shaft (3) are rotatably combined. In the double shaft (1) , the excavation blade (7) is fixed to the lower end of the inner shaft (2) , and the upper stirring blade (12) and the stirring diameter of the inner stirring blade (12) are higher than the inner blade (12). A triple stirring blade that overlaps in the radial direction by concentrically positioning a large frame-shaped intermediate stirring blade (13) and a frame-shaped outer stirring blade (19) having a larger stirring diameter than the intermediate stirring blade (13). (a) constitutes a, the inner stirring blade (12) and an outer agitation blades (19) is fixed to the inner shaft (2), rotary drive which transmits one-way rotated in the inner shaft (2) connect device (24), forward and reverse by the intermediate agitating blade (13) is fixed to the outer shaft (3), the outer shaft (3) is rocking mechanism And configured to restore rotating stirring device such as a soil improvement device. The inner stirring blade (12) according to claim 1, wherein the inner stirring blade (12) is configured by fixing a base portion of a linear rod-shaped body projecting radially on the inner shaft (2), and the intermediate stirring blade (13) has a rod shape and the above-described inner stirring blade (12). An upper side and a lower side of a rectangular frame shape having a larger stirring diameter than the inner stirring blade (12) are positioned on both upper and lower sides of the inner stirring blade (12), and the upper side of the rectangular frame shape is fixed to the outer shaft (3). The lower side of the frame shape is rotatably attached to the inner shaft (2), and the outer stirring blade (19) is a rod-like upper side of a rectangular frame having a larger stirring diameter than the intermediate stirring blade (13) and The lower side is positioned on both the upper and lower sides of the upper and lower sides of the intermediate stirring blade (13), the upper side of the rectangular frame is rotatably attached to the outer shaft (3), and the lower side of the rectangular frame is connected to the inner shaft (2). Straight and projecting inward in the radial direction to the vertical side connecting the top and bottom sides of the rectangular frame The base of the rod-like body is fixed, and the linear rod-like body of the outer agitation blades (19) is constructed by arranging the upper and lower sides of the linear rod members of the intermediate agitating blade (13), a stirring device, such as a soil improvement device. In Claim 1 or Claim 2, the said intermediate | middle stirring blade (13) prepares the multiple types from which the stirring diameter space | interval between the said outside stirring blades (19) differs widely, and the said outer shaft (3) Stirring device such as ground improvement device that can be selectively attached to and detached from the ground .

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