JP3284451B2 - Stirring mixing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to, for example, a method of improving a soft ground or constructing a continuous underground wall, etc., by stirring while discharging and pouring mortar, cement milk, powdery and the like into the ground. The present invention relates to a stirring and mixing processing apparatus used for mixing, and is particularly suitable for a case where a plurality of rotating shafts are used to operate a part of the rotation trajectory of each stirring blade in a tangent or overlapping state.

[0002]

2. Description of the Related Art As shown in FIGS. 5 and 6 , a stirring and mixing apparatus of this kind includes two rotating shafts 1 which are rotated by a driving device installed on the upper side, and It has a stirring blade 2 on the lower end side, which is integrally rotatably fixed to a plurality of upper and lower stages, and a digging blade 3 provided at the lower end of each rotating shaft 1, and the stirring blades 2 of each rotating shaft 1 Mutual rotation trajectory a
Are arranged in a tangent or overlapping state, and a supply passage for feeding the improving material is provided in the rotary shaft 1. Reference numeral 4 denotes a co-rotation prevention plate disposed between the rotation shafts 1. Then, the improving material is conveyed through a supply passage to a discharge port provided at a root portion of the stirring blade 2 and the like, and further discharged into the surrounding soil with the rotation of the stirring blade 2 and mixed and mixed with the soil. Then, the improved ground 5 is obtained.

[0003] When the stirring blades 2 of the rotary shafts 1 are arranged so as to tangentially or partially overlap with each other in a part of the rotation locus a, the rotations of the rotary shafts 1 are synchronized. And the left and right stirring blades 2 do not collide with each other at the same height. However, in order to synchronize the two axes, a gear mechanism and a control mechanism must be provided in the drive unit. Become. Therefore, in general, the stirring blades 2 attached to each rotating shaft 1 are arranged such that the left stirring blade 2 is positioned relatively above the stirring blade 2 of the right rotating shaft 1 as shown in FIG. By providing a step at the top and bottom, collision between the stirring blades 2 is prevented.

[0004]

[SUMMARY OF THE INVENTION However, in the structure attaching a conventional as step the stirring blade 2 of the respective rotary shaft 1 vertically, in the example of processing ground in FIG. 5, ground layer for improvement of interest 6 Is located on the supporting ground layer 7, and when the improved ground 5 is to be applied to the supporting ground layer 7 , the lowermost stirring blade 2 on the left side despite the lower right stirring blade 2 has reached the supporting ground layer 7. Since 2 has not yet reached the supporting ground layer 7 , the two axes have to be further lowered, and the construction efficiency deteriorates accordingly. In addition, when the supporting ground layer 7 is hard such as rock, the rotating shaft 1 may not be able to descend, and an unimproved portion 8 having a size proportional to the step difference between the stirring blades 2 of each rotating shaft 1 is formed. There is a problem that it will.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to structurally eliminate an unimproved portion as in the related art, even if the structure does not synchronize the rotation of a plurality of rotating shafts. It is an object of the present invention to provide a stirring and mixing processing apparatus which is excellent in construction efficiency. Other objects of the present invention will be clarified with the following description.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a plurality of rotating shafts which are rotated by a driving device.
Agitating blades of one or more stages attached to the respective rotating shafts, wherein the agitating blades of the adjacent rotating shafts are arranged in a state in which a part of their rotation locus tangently or overlaps. In the stirring and mixing processing device for mixing and stirring the ground soil and the improving material, etc., among the stirring blades of each of the rotating shafts,
At least the lowest stirring blades adjacent to each other
Attached to the same height in the axial, and Mototsubasa integrally rotatably fixed to the rotating shaft, rotatably by rotating a predetermined range by pivoting the substantially middle against the projecting free end of the base blade a winglet consists of a said with the winglet is divided into the one side halves of the pivot portion as the base point and the other side half portion, by Ri one side half portion in the rotation of the rotary shaft group located in the extension of the projecting free ends of the wings, those the other side half portion when the rotational shaft side
Restricts the rotation of the winglets and secures them at the same height
The winglet of one stirring blade attached to and adjacent to the other stirring blade
When it hits the small wing, the small wing of the other stirring wing is stirred by the one wing.
This is achieved by rotating the stirring blade out of the rotation locus .

[0007]

According to the above-described apparatus configuration, even when the stirring blades of the present invention are mounted on the respective rotating shafts at the same height and the respective rotating shafts are separately rotated, the stirring blades are damaged by collision. There is no such thing. Here, the present invention has the following specific modes as the device configuration depending on the number of stages of the stirring blade. In this case, only one stage of the stirring blade is attached to each rotating shaft, and the stirring blade configuration, which is a main part of the present invention, is applied to the stirring blade. In this device configuration, the stirring blades correspond to those at the lowermost stage. In this case, a plurality of (for example, three or four) stirring blades are attached to each rotating shaft. In this case, as the first device configuration, it is possible to apply the stirring blade configuration, which is a main part of the present invention, to all of the stirring blades. In addition, as the second apparatus configuration, it is possible to apply the configuration of the stirring blade, which is a main part of the present invention, only to the lowermost stirring blade out of the plurality of stages of stirring blades. Further, as the third device configuration, the stirring blade configuration, which is a main part of the present invention, can be applied to the lowermost stirring blade and the uppermost stirring blade of the plurality of stages of stirring blades. In this case, adjacent stirring blades are attached to the stirring blade in the middle in a shifted manner as in the related art.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 4 show a device configuration according to an embodiment of the present invention. In the drawings, the same parts or members as those of the conventional device are denoted by the same reference numerals.

[0009] Real施例stirring and mixing treatment device, two a rotary shaft 1 of which is rotated by a driving device which is installed on the upper side as shown in FIG. 2, the vertical In the lower end of the rotary shaft 1 3 Agitating blades 2A, 2B, 2C attached to the step, a drilling blade 3 provided at the lower end of each rotating shaft 1 so as to be integrally rotatable, and a rotating shaft 1
And a rotation prevention plate 4 incorporated between the rotation shafts 1.
The stirring blades 2A, 2B, and 2C are arranged so that a part of their rotation trajectory a is tangent or overlap with each other as in FIGS. 5 and 6, and the supply passage for feeding the improving material is rotated. This is a structure provided inside the shaft 1. The supply passage may be provided with a supply pipe along the inside of each rotary shaft 1. In essence, it is a passage through which mortar, cement milk, powdery and granular improver, etc., injected into the soil when rotating and digging, etc. are passed. Further, the co-rotation prevention plate 4 has a configuration in which mounting portions 4a fitted to the outer periphery of the respective rotation shafts 1 are connected to each other by a prevention plate 14b, and is provided between the stirring blades A and the stirring blades B and the stirring blades B. And a stirring blade C.

Here, the stirring blades 2A, 2B of each rotating shaft 1
Is composed of a pair of blade members fixed to the shaft peripheral surface and extending outward as in the conventional case, and is arranged with a step so that the left and right stirring blades 2A, 2A and the stirring blades 2B, 2B do not collide with each other. Have been. On the other hand, the stirring blades 2C, 2C of each rotary shaft 1 are the main parts of the present invention, and
At the same height. The structure of the stirring blade 2C is composed of two base blades 12 fixed integrally and rotatably to the rotating shaft 1 as shown in FIGS.
And two small wings 13 pivotally supported substantially at the middle on the free ends protruding between the base wings 12 and located on both sides.

The base blade 12 is bilaterally symmetric, has a through hole 12a which is located at an intermediate portion and is open vertically, and
Is fixed around the axis by a fixing means such as spot welding while passing through. One-sided protrusion dimension L1 of the base wing 12
Is set smaller than the rotation locus a (radius R) drawn by the stirring blades 2C, 2C, and is set to a length such that the rotation locus a does not enter a tangent circle or an overlapping portion. The small wing 13 has a boomerang shape as a whole, and is rotatably supported by a shaft 14 so as to be rotatable within a predetermined range between the base wings 12. And the small wing 13 is a shaft 14
And the other half 13b and the other half 13b
The one half portion 13a is located at an extension of the free end of the base wing 12, and the other half portion 13b is rotated. Strikes the outer periphery of the rotating shaft 1 so that its rotation can be regulated. Therefore, the rotation range is as shown in FIG.
Is the range of θ shown in FIG.

[0012] Incidentally, the small wing 13 is capable not be a boomerang shape, projecting a stopper piece to the outer periphery of the base blade 12 side or the rotation shaft 1, restricting the rotation of the winglet 13 by striking the stopper piece It is also possible.

[0013] Next, FIG. 5 of the above stirring and mixing apparatus, FIG.
The case where the present invention is applied to a construction example similar to that of No. 6 will be outlined. First, after the stirring and mixing apparatus of FIG. 2 is moved by a crane or the like to determine the position, the penetration operation is performed while rotating each rotating shaft 1. In this case, the driving device connected to the upper end rotates the left rotating shaft 1 in the direction of arrow b in FIG. 1 and the right rotating shaft 1 in the direction of arrow c in FIG. While penetrating to a predetermined depth. In general, the operation proceeds to the stirring and mixing operation in the intrusion process. In this case, the supply passages disposed inside the rotary shafts 1 are provided with the respective stirring blades 2A, 2B, and 2C.
The improvement material is discharged from the discharge port into the in-situ soil stirred by the stirring blades 2A, 2B, and 2C. The discharged modified material, stirring blades 2A, 2B, are stirred and mixed is sprayed on the rotation trajectory to the original position soil with the rotation of 2C, to construct a improved process ground 5 of the cross-sectional shape of FIG. The stirring and mixing operation may be performed in the process of drawing out the rotary shaft 1 after penetrating it to the designed depth, or may be performed in the process of penetrating and drawing out.

FIG. 1 shows such a stirring and mixing process.
The operation of the stirring blade 2C of each rotating shaft 1 is shown. For the sake of convenience, only the left rotating shaft 1 rotates for the operation of each stirring blade 2C,
Assume that the right axis of rotation has stopped rotating. The small wings 13 constituting the left stirring blade 2C rotate by the reaction force (force in the direction of arrow d) received from the ground side while rotating in the direction of arrow b together with the base blade 12 by the rotation of the rotation shaft 1 thereof,
The state shown by the solid line in the figure is maintained, that is, a state in which the rotation trajectory a can be formed. When the upper small wing 13 rotationally moves from the S1 position to the S2 position, it hits the one half 13a of the right small wing 13. Then, the right wing 13 is pushed by the collision force from the position of S3 shown by the solid line,
It rotates to the S4 position indicated by the one-point oblique line, and moves out of the rotation trajectory a of the left small wing 13. Such a left small wing 13
By the rotational movement, even if the left and right stirring blades 2C are arranged at the same height and part of their rotation trajectories a in a tangent or overlapping state, they will not be damaged by collision,
The stirring and mixing action can be maintained normally. Incidentally, when the rotation shaft 1 on the right side is rotated in the arrow c direction, the right side of the small blades 13
Is pushed by the force from the collision from the position S3 shown by the solid line,
At the S3 position, it is rotated and moved to the S4 position indicated by a one-point diagonal line against the reaction force received from the ground side.

Therefore, for example, in the treated ground shown in FIG. 5 , the ground layer 6 to be improved is a hard supporting ground layer 7 such as a bedrock.
Even if it is designed to construct the improved ground 5 up to the supporting ground layer 7 , the stirring blades 2 </ b> C
Are provided at the same height position, so that they reach the support ground layer 7 at the same time, and the unimproved portion 8 as in the prior art cannot be structurally formed.

The present invention is not limited to the above-described embodiment, and the parts other than the main part can be appropriately changed according to the construction conditions and the like. For example, it is also possible to stirring blade 2A at each rotary shaft 1, also 2B apply a stirring blade 2 C real施例.

[0017] In this case, in particular, in the device structure of FIG. 2, a stirring blade 2 C real施例with the bottom, in addition to the above effects to be applied to top, can be obtained following operational effects . That is, in the apparatus configuration, the improving material passes through the inside of the rotating shaft 1 and is selectively discharged from each of the discharge ports provided at the bases of the lowermost and uppermost stirring blades 2C . Here, FIG.
In the case where there is a step between the uppermost stirring blades 2 in each rotating shaft 1 as in the apparatus of FIG. 5 and FIG. 5 , and in the construction in which the improving material is discharged also in the drawing process, when the leftmost uppermost stirring blade comes out to the ground, There is a case where the stirring blade at the top right is still located in the ground. In this case, the discharge of the above-mentioned improved material is generally performed until both the uppermost stirring blades come out on the ground, and the left side has already come out on the ground. To waste. In order to eliminate this waste, when the uppermost stirring blade on the left reaches the ground, the discharge of the improving material at the base of the stirring blade is individually stopped (and then when the right stirring blade comes to the ground) To stop the corresponding exhalation). However, if the discharge of the improving material is controlled in accordance with the position of each drive shaft and each stirring blade, the control mechanism becomes complicated. In such a case, the stirring blades at the uppermost stage of each drive shaft 1 are provided at the same height as shown in FIG.
In the case of C, since it comes out on the ground at the same time, there is no waste of the improved material, and the operation can be performed by a simple operation without requiring a complicated control mechanism.

[0018]

As described above, according to the apparatus for agitating and mixing a ground according to the present invention, in particular, the lowermost stirring blades are mounted at the same height on each rotating shaft, and each rotating shaft is separately rotated. Even in this case, the stirring blades are not damaged by collision. As a result, it is possible to structurally eliminate the unimproved portion as in the related art, and to improve the construction efficiency. In addition, the structure of the apparatus is simple because only the stirring blade is improved, and the apparatus can be implemented at a low cost, and can be easily applied to existing apparatuses used for the implementation.

[Brief description of the drawings]

It is a schematic diagram showing the operation of the apparatus main unit according to the actual施例of the present invention; FIG.

2 is a schematic external view showing a device configuration according to the actual施例.

3 is a partial side view of the stirring blade structure of the device according to the real施例.

FIG. 4 is a schematic view showing the operation of the stirring blade of FIG.

FIG. 5 is a schematic diagram illustrating a problem when a conventional stirring and mixing processing apparatus is used.

It is a sectional view showing an improved process ground shape to be performed by the stirring and mixing apparatus in FIG. 6 FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotation axis 2C Stirrer blade 12 Base blade 13 Small wing 13a One half 13b The other half a Rotation locus of stirring blades

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Teruaki Rangoda 8-22-8-202 Onakadai, Inage-ku, Chiba-shi, Chiba (56) References JP-A-60-98009 (JP, A) JP-A-57- 61110 (JP, A) Fully open 1979-78304 (JP, U) Fully open 1979-128706 (JP, U) Fully open 1983, 58-33537 (JP, U) (58) Field surveyed (Int. ⁷ , DB name) E02D 3/12 102

Claims (2)

(57) [Claims] 1. A rotating device comprising: a plurality of rotating shafts rotated by a driving device; and one or more stages of stirring blades attached to each of the rotating shafts. In a stirring and mixing processing apparatus for mixing and stirring the ground soil and the improving material, etc., which are arranged so that a part of the rotation locus thereof is tangent or overlapped, at least the lowest stage of the stirring blades of each of the rotating shafts The stirring blades adjacent to each other are mounted at the same height
Vignetting and consists of a Mototsubasa integrally rotatably fixed to the rotating shaft, only rotatable winglet predetermined range pivotally its substantially middle against the projecting free end of the base blade, wherein with the winglet is divided into the one side halves of the pivot portion as the base point and the other side half portion, projecting halves <br/> by Ri one side to the rotation of the rotary shaft of the base wings located in the extension of the free end, the other half portion side to restrict the rotation of the winglet when the rotation shaft side, also mounted on the same height position next
The winglet of one stirring blade in contact with the winglet of the other stirring blade
Then, the small blade of the other stirring blade is rotated by the rotating gauge of the one stirring blade.
A stirring and mixing processing apparatus characterized by rotating and moving outside a trace . 2. The stirring and mixing apparatus according to claim 1, wherein the small wings are formed in a boomerang shape.