JP2802848B2 - Stirring mixing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for stirring and mixing mortar, cement milk, powdery and other modifiers into the ground while discharging and pouring them into the ground in order to enhance the ground strength of the soft ground. And a stirring and mixing apparatus.

[0002]

2. Description of the Related Art A large number of devices of this type have been known in the prior art. Generally, a drive shaft rotated by a drive motor, a digging wing integrally rotatably attached to a lower end of the drive shaft, and With a stirring blade located above the excavation blade and rotatably attached to the drive shaft,
A supply passage for feeding the improving material is provided along the drive shaft and is scattered in the longitudinal direction of the stirring blade, and the stirring is performed while discharging and injecting the improving material from all of the plurality of discharge ports formed in the stirring blade. The wings are rotated and the ground soil and the improving material are mixed and stirred to obtain a treated ground.

In such a stirring and mixing method, since the improving material is discharged from all the discharge ports, the discharge pressure at each discharge port is theoretically constant and the discharge amount of the improving material is uniform. is there.

[0004]

However, depending on the ground soil, there are hard soils, soft soils, dry soils and wet soils, and the conditions are not constant. Therefore, in the related art, the discharge pressure is set so as to be able to correspond to as many conditions as possible. For this reason, if the properties of the ground soil and the like are significantly different, there is a problem that the improving material may not be discharged evenly and quantitatively, the stirring efficiency is poor, and the quality varies and the stability is not stable.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a stirring and mixing apparatus having a structure capable of improving stirring efficiency and stabilizing quality. .

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a stirring blade attached to a driving shaft by using a plurality of discharge ports formed in the stirring blade in a longitudinal direction and a plurality of discharge ports. A stirring and mixing processing apparatus that rotates together with the drive shaft while discharging and mixes and stirs the ground soil and the improving material, wherein a shutter means for opening a specific discharge port among the plurality of discharge ports is provided. It is.

[0007]

According to this structure, by controlling the shutter means,
Since the improving material can be sequentially discharged and injected only from a specific discharge port, the improving material can be uniformly discharged to each part by switching the opened discharge ports.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic side view of an essential part showing a part of a stirring and mixing processing apparatus according to an embodiment of the present invention, and FIG.
FIG. 3 is a schematic exploded perspective view of the essential parts of the above, shown in FIG. 1, FIG. 3 is a schematic side view seen from a direction along the line AA in FIG. 1, FIG. 4 is a cross-sectional view taken along the line BB in FIG. 5 is a sectional view taken along line CC of FIG. 1, FIG. 6 is a sectional view taken along line DD of FIG. 1, and FIG. is there.

First, the schematic structure will be described with reference to FIG. 7. This device has a drive shaft 1 rotated by a drive motor (not shown), and the drive shaft 1
A plurality of (four in this embodiment) stirring blades 3 are provided. In the drive shaft 1, a fluid pipe 4 (FIGS. 1 and 2) through which mortar, cement milk, powdery and granular improver, and the like are injected into the ground soil during the stirring and mixing process.
See also). Further, the stirring blade 3 is formed by a pair of blade portions 3a and 3b extending on both sides of the drive shaft 1, and is sent by a fluid pipe 4 to a surface of one of the blade portions 3a opposite to the rotation direction. A plurality (three in this embodiment) of discharge ports 5 for discharging and injecting the improved material into the ground soil are scattered in the longitudinal direction of the wing portion 3a.
In this embodiment, the other wing 3b has a discharge port 5
Although the structure which does not have a wing is disclosed,
a and 3b may be provided.

Next, each stirring blade 3 will be described with reference to FIGS.
And the detailed configuration in the surrounding area will be described. FIG.
6 to 6, a cavity 6 is formed inside each of the wings 3a so as to lie in the longitudinal direction. One end of the cavity 6 opens into the drive shaft 1 and the other end is closed. The cavity 6 is
The state is in communication with the outside through the discharge port 5. Further, a rotating column 7 constituting shutter means is rotatably disposed in the hollow portion 6 via a support shaft 12.

In addition, a motor 8 for rotating the rotary column 7 is attached to the other end of the rotary column 7 protruding into the drive shaft 1. Also, on the peripheral surface of the rotating column 7,
Recesses 9 provided at positions corresponding to the respective discharge ports 5
a, 9b, 9c, a circumferential groove 10 provided at a position corresponding to the fluid pipe 4, a circumferential groove 10 and concave portions 9a, 9b, 9
c, the lead grooves 11a,
11b and 11c. The recesses 9a, 9b, 9c are not formed over the entire circumference of the rotating column 7, are equally divided into three, and are shifted by 120 degrees as shown in FIGS. Formed at the location. In addition, the peripheral surface of the rotary column 7 has a portion 1 where the nozzle tip of the fluid pipe 4 for supplying the improving material into the orbital groove 10 is inserted.
With the exception of 3 (see FIG. 1), the whole is covered with the stirring blades 3 so that unnecessary improving material does not leak.

Next, the operation of the stirring and mixing processing apparatus thus configured will be described. First, the drive shaft 1 is rotated by a drive motor (not shown), and the excavation and stirring blade 2 is integrally formed therewith.
And the stirring blade 3 also starts rotating while cutting the ground soil.
At the same time, the improving material is supplied from the fluid pipe 4 into the orbital groove 10 while driving the motor 8 of each stirring blade 3 to rotate the rotary column 7. Then, the improving material supplied into the orbital groove 10 is guided to the lead grooves 11a, 11b and 11c, respectively, and supplied to the concave portions 9a, 9b and 9c. The improving material supplied to the concave portions 9a, 9b, 9c is
a, 9b, and 9c are discharged from the discharge ports 5 corresponding to the recesses 9a, 9b, and 9c. Since the concave portions 9a, 9b, and 9c are shifted from each other by 120 degrees, the improving material is discharged from all the discharge ports 5 at once. Is not ejected, but is ejected only from the ejection port 5 whose shutter is open corresponding to the concave portions 9a to 9c. In addition, the outlets 5 corresponding to the recesses 9a to 9c, that is, the outlets not covered by the shirting means, change as the rotary column 7 rotates, so the three outlets 5 Will be discharged in order.

Therefore, according to the stirring and mixing apparatus of this embodiment, the improving material is not discharged from three discharge ports 5 at a time, but is discharged from one discharge port 5 which can be switched in order. The discharge amount discharged from the outlet 5 can be increased to give momentum. Thus, if there is a soil particle or the like that is trying to close the discharge port 5 or is blocking the discharge port 5, a certain amount of the improving material can always be stably discharged. In addition, since the opened discharge ports 5 are forcibly switched and controlled, a predetermined amount of the improving material can be uniformly discharged from the predetermined discharge ports 5.

In the above embodiment, the structure in which the improving material is discharged from only one discharge port 5 at a time is disclosed. However, for example, the structure is such that the improving material is always discharged from two discharge ports 5. It is safe to do so. Also,
The number of the discharge ports 5 is not limited to three, but may be three or more. Furthermore, although the case where the rotating column 7 rotates regularly in a fixed direction has been disclosed, a structure in which the discharge port 5 can be arbitrarily selected and held at a fixed position for an arbitrary time may be adopted. In the above embodiment, the example in which the shirting means of the present invention is applied to the stirring blade 3 is described. However, such a shirting means may be similarly applied to the excavating and stirring blade 2. May be omitted and provided only on the excavating and stirring blade 2.

FIGS. 8 to 10 show a modified example of the blade section 3a of each stirring blade 3. FIG. 8 to 10, the same reference numerals as in FIG. 7 indicate the same as those in FIG. 8 to 10, a hollow portion 21 is formed inside the wing portion 3a so as to lie in the longitudinal direction. One end of the cavity 21 is open in the drive shaft 1 and the other end is closed.
1 and the outside are in communication with each other at the discharge ports 5. Further, in the hollow portion 21, a guide cylinder 23, a shutter belt 24, and the like which constitute the shutter means 22 are disposed.

More specifically, one end of the guide cylinder 23 is communicated with the fluid pipe 4 so that an improving material can be supplied into the guide cylinder 23. Further, the guide cylinder 23 has three window holes 25a, 25 corresponding to the discharge ports 5, respectively.
b, 25c are formed, and the improved material supplied into the guide cylinder 23 can be discharged to the outside through the window holes 25a, 25b, 25c and the discharge port 5.

On the other hand, the shutter belt 24 is provided around the guide tube 23 in an endless manner so as to cover the front surfaces of the window holes 25a to 25c of the guide tube 23. At one end of the guide cylinder 23, the output shaft 2 of the motor 27 is hung on the pulley 26, and at the other end of the guide cylinder 23.
7a, which is hung on a pulley 28 which is integrally rotatably attached to 7a. Also, this shutter belt 2
4 has two through holes 29 corresponding to the window holes 25a to 25c.
Each of them is repeatedly formed in a pair. Note that the pitch of the two through holes 29 forming the pair is
The pitch substantially corresponds to the pitches 5a to 25c. When the shutter belt 24 is rotated, the two window holes 25a and 25b or the window holes 25b and 25c are simultaneously set to correspond alternately.

Therefore, according to the structure of this modification,
When the motor 27 is driven to rotate the shutter belt 24, the discharge port 5 in a portion where the through hole 29 does not correspond is closed and the improving material is not discharged, but as shown in FIG. The discharge port 5 at the portion corresponding to the through hole 29 is opened, and the improving material is discharged. This moves for each discharge port 5 and is repeated again. That is, even in the case of this modified example, the improving material is not discharged from all the discharge ports 5 at one time, and the discharge ports 5 whose shutters are opened corresponding to the through holes 29 are not provided.
Will be discharged only from

FIGS. 11 and 12 show other modified examples of the blade section 3a of each stirring blade 3. FIG. In FIGS. 11 and 12, the same reference numerals as in FIG.
It shows the same thing as. 11 and 12, a hollow portion 31 is formed inside the wing portion 3a so as to lie in the longitudinal direction. One end of the cavity 31 is open in the drive shaft 1 and the other end is closed, and the discharge port 5 is provided between the cavity 31 and the outside.
It is in a state of being communicated with. Further, a guide tube 33 and a shutter tube 34 constituting the shutter means 32 are disposed in the hollow portion 31.

More specifically, one end of the guide cylinder 33 is communicated with the fluid pipe 4 so that an improving material can be supplied into the guide cylinder 33. The guide cylinder 33 has three window holes 35 respectively corresponding to the discharge ports 5.
a, 35b are formed, and the improving material supplied into the guide cylinder 33 can be discharged to the outside through the window holes 35a, 35b, 35c and the discharge port 5.

On the other hand, the shutter cylinder 34 is
Are provided so as to be reciprocally slidable in the left-right direction while covering the front surfaces of the window holes 35a to 35c. Further, a hydraulic cylinder 36 for switching the slide of the shutter cylinder 34 is attached to one end of the shutter cylinder 34. In addition, the shutter cylinder 34 is provided with two through holes 39 corresponding to the window holes 35a to 35c in a state substantially corresponding to the pitch of the window holes 35a to 35c. When the shutter cylinder 34 is slid, the two window holes 35a and 35b or the window hole 35
b and 35c are set to correspond to each other alternately.

Therefore, according to the structure of this modification,
When the shutter cylinder 34 is slid by the hydraulic cylinder 36, the discharge port 5 in a portion where the through hole 39 does not correspond is closed and the improving material is not discharged, but as shown in FIG. The discharge / injection is performed while this opening / closing is repeated, such that the discharge port 5 in the portion corresponding to 39 is opened and the improving material is discharged.

[0023]

As described above, according to the agitating and mixing processing apparatus of the present invention, the improved material can be discharged and injected only from a specific discharge port by controlling the shutter means. By switching the outlet, the improving material can be discharged uniformly at each part. This allows
Effects such as improvement of stirring efficiency and stabilization of quality can be expected.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a main part of a stirring and mixing apparatus according to an embodiment of the present invention, which is partially cut away.

FIG. 2 is a schematic exploded perspective view of a main part of the same shown in FIG.

FIG. 3 is a schematic side view showing a view along a line AA in FIG. 1;

FIG. 4 is a sectional view taken along line BB of FIG. 1;

FIG. 5 is a sectional view taken along line CC of FIG. 1;

FIG. 6 is a sectional view taken along line DD in FIG. 1;

FIG. 7 is a side view showing a main part configuration of the stirring and mixing processing apparatus shown in FIGS. 1 to 6 in a stirring processing state.

FIG. 8 is a main part schematic side view showing a modification of the present invention with a part thereof broken away.

FIG. 9 is a schematic side view partially broken along the line EE in FIG. 8;

FIG. 10 is a schematic side view partially broken along line FF in FIG. 8;

FIG. 11 is a schematic side view of an essential part showing still another modified example of the present invention with a part thereof broken away.

FIG. 12 is a schematic side view partially broken along the line GG of FIG. 11;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drive shaft 2 Excavation and stirring blade 3 Stirring blade 4 Fluid pipe 5 Discharge port 6 Rotating column (shutter means) 15 Shutter means 22 Shutter means 23 Guide cylinder 24 Shutter belt 32 Shutter means 33 Guide cylinder 34 Shutter cylinder

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yohei Hayashi 1 of 1 Ishiodai 1 Kasugai-shi, Aichi Pref. Hisashi Misawa 6-2-3-502 Toyooka, Tama-shi, Tokyo (72) Inventor Akihiro Miyoshi 1758 Kasama Building 202, Kasama-cho, Sakae-ku, Yokohama-shi, Kanagawa-ken (72) Inventor Shigeyuki Sakai 592- 6 (56) References JP-A-61-229015 (JP, A) JP-A-54-81614 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) E02D 3/12 102

Claims (1)

(57) [Claims] 1. A stirring blade attached to a drive shaft is rotated together with the drive shaft while discharging an improving material from a plurality of discharge ports formed in the stirring blade and scattered in a longitudinal direction to rotate the stirring soil. A stirring and mixing processing apparatus for mixing and stirring with an improving material, wherein shutter means for sequentially opening and closing a specific discharge port among the plurality of discharge ports is provided.