JPH1171749A - Ground improvement equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the structure of an excavation shaft and reduce cost by fitting a short driven shaft to an exclusive excavation blade-mounting shaft connected to a driving shaft that can be extended by additional attachment and transmitting reversely a rotational driving force by an excavation driver through the excavation blade-mounting shaft and the rotation transmission device from the driving shaft. SOLUTION: A partial double excavation shaft is formed by connecting long shafts 21 extendable by additional attachment between an excavation shaft driving device 13 and an excavation shaft upper end holding device 14, connecting long shafts 23 different from the long shafts 21 in shape to the lower end thereof, and fitting short shafts 24 that ending through step-up gear transmission mechanisms 22a of rotation transmission devices 22 provided on the upper portion of the long shafts 23 into the long shafts 23 rotatably. The rotation transmission devices 22 step up the rotation of the long shafts 23 through the step-up gear transmission mechanisms 22a, transmitting it to the short shafts 24, thereby making the short shafts 24 and the excavation agitation blades 26, 27 rotate in the mutually opposite directions in relation to the long shafts 23 and the excavation agitation blades 25, thereby localizing the double excavation shaft portions in the head of the excavation shafts, simplifying the structure of the excavation shaft and making it lightweight, and performing excavation and agitation effectively and reducing cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soil improvement device provided with stirring blades which rotate in opposite directions to each other at the lower end of an excavation shaft.

[0002]

2. Description of the Related Art Conventionally, this type of apparatus is disclosed in
There is a ground improvement device described in -133614. In this device, an inner and outer shaft forming a double excavation shaft is provided over the entire length of the reader, a rotation driving device for the outer shaft is provided at a lower portion, and a transmission mechanism for transmitting the rotation of the outer shaft to the inner shaft is provided at an upper end of the inner and outer shaft. Thus, the aim is to improve the stirring efficiency.

[Problems of the prior art] However, in this device, the construction of the double excavation shaft (inner / outer shaft) is complicated and costly, and the weight of the excavation shaft is increased, so that the extension work is difficult. There was a problem that workability deteriorated.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the problems of the prior art, and an object to be solved for solving the problem is to fit an excavation shaft to a long shaft and its tip. Localizing the double excavation shaft part by forming a short shaft to simplify the construction, production and handling of the excavation shaft relation,
It is an object of the present invention to provide a ground improvement device which is easy and reduces costs.

[0005]

Means for Solving the Problems Claim 1 of the present invention
The soil improvement device according to the present invention is provided with an excavation stirring blade on each of the inner and outer shafts of the double excavation shaft, and in a soil improvement device that stirs excavated soil while excavating and excavating each excavation stirring blade during excavation, is formed so as to be able to be added. A drive shaft, a dedicated cutting blade mounting shaft detachably connected to a lower end of the drive shaft, and a driven shaft shorter than the dedicated cutting shaft mounting shaft rotatably fitted to the dedicated cutting shaft mounting shaft. Forming a partial double digging shaft provided with a digging shaft driving device for rotating and driving the driving shaft, and a rotary driving force transmitted from the driving shaft to the digging blade mounting dedicated shaft from the digging blade mounting dedicated shaft. And a rotary transmission that reversely transmits the driven shaft to the driven shaft.

According to a second aspect of the present invention, in the ground improvement apparatus, the partial double excavation shaft is mounted on a single reader in a left and right pair, and each of the partial double excavation shafts is mounted on the excavation shaft driving device. A synchronous mechanism for rotating the shafts in directions opposite to each other is provided, and the rotary transmission devices provided on the respective excavating blade mounting dedicated shafts of the partial double excavating shaft are integrally connected by a connecting member.

The ground improvement apparatus according to claim 3 is characterized in that the rotary transmission is provided with a speed increasing gear transmission mechanism.

The ground improvement device according to claim 4 is characterized in that the rotary transmission device is provided with a reduction gear transmission mechanism.

According to a fifth aspect of the present invention, in the ground improvement apparatus, the rotary transmission is provided with a spur gear transmission mechanism, and the excavating blade mounting dedicated shaft is provided with a stirring member for stirring the outer peripheral side of the rotary transmission. It is characterized by the following.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following embodiments of the present invention, a case will be described in which a double shaft is formed only in the vicinity of a stirring blade mounting portion. However, this embodiment is specifically shown for better understanding of the gist of the invention, and does not limit the contents of the invention unless otherwise specified.

[First Embodiment] FIG. 1 shows an external view of a ground improvement apparatus, FIG. 2 shows an outline of a drive system provided with a gearbox, and FIG. 3 shows a stirring blade rotating mechanism.

The ground improvement apparatus includes a leader 11 erected by a base machine 10, a guide rail 12 disposed along the leader 11, and a vertically movable movable rail mounted on the guide rail 12. An excavating shaft driving device 13 disposed, an excavating shaft upper end holding device 14 disposed above the excavating shaft driving device 13 and mounted to be vertically movable with respect to a guide rail 12, and a plurality of excavating shaft driving devices provided at an upper end of the reader 11. The wire rope 16 is wound over the guide pulleys 15a, 15b, and 15c, and a winch for feeding or winding the wire rope 16 is provided, and the excavation shaft upper end holding device 1 is provided.
Excavation axis lifting / lowering device (not shown) for operating the vertical direction 4
And (FIGS. 1A and 1B)

A long shaft (drive shaft) 21 of the excavating shaft 20 is connected between the excavating shaft driving device 13 and the excavating shaft upper end holding device 14 so as to be able to be extended. Long shaft (drive shaft) 2 having a shape different from that of the long shaft 21
3 is connected as an excavating blade mounting-dedicated shaft at a connecting portion (not shown), and a rotary transmission 22 is provided on a long shaft 23 so as to be capable of transmitting power, and a speed increasing gear transmission mechanism 22 a provided on the rotary transmission 22 is provided. Shaft (driven shaft) 24 that meshes through
Is rotatably fitted to the long shaft 23. The long shaft 21, the long shaft 23, and the short shaft 24 externally fitted via the rotary transmission 22 form a partially double excavation shaft.

The long shaft 23 and the short shaft 24 are provided with an excavating and stirring blade 25, an excavating and stirring blade 26, and stirring blades 27 and 27 having various cross-sectional shapes, respectively (FIGS. 2 and 3).
In the long shaft 23, an outlet 29 for a fluid flowing inside the isolation hollow shaft 28 is opened at the lowermost end, and a lubricant directed in a direction crossing the axial direction is provided above the rotary transmission 22. A discharge port 30 is provided so that water as a lubricant can be discharged during excavation (FIG. 3).

The excavating and stirring blades 25 on the long shaft 23 side are separated from the lowermost end of the long shaft 23 obliquely upward, and rise vertically upward from a position corresponding to a substantially excavating radius.
After passing through an upright section of an appropriate length, it slides approximately horizontally to the long shaft 23 side and has a short shaft 24 as an axis (not shown).
Is connected to a cylindrical bearing part 25a in which is fitted, and a bar-shaped member 25b is provided in the horizontal direction from the uppermost end of the bearing part 25a to form a self-shape. It is formed in a shape provided with a bar-shaped member 25d approaching from the center to the shaft side. The excavating and stirring blade 25 has a long shaft 2
Three pieces are arranged at equal pitches on the outer circumference of No. 3.

The excavating and stirring blades 26 on the short shaft 24 side are formed in a side surface shape by the rotary transmission device 22 and the excavating and stirring blades 2 on the long shaft 23 side.
5 is horizontally separated from an intermediate position with the horizontal bar-shaped member 25b located at the uppermost end of the cylindrical member 25, and hangs vertically downward from a position corresponding to a substantially excavation radius, and is connected to the excavation stirring blade 25. It is formed in a U-shape that is close to the horizontal axis side at a substantially central portion of the bearing portion 25a. The three excavating and stirring blades 26 are arranged at equal pitches on the outer periphery of the short shaft 24.

The lower end of the short shaft 24 has two axial ends.
A plurality of stirring blades 27 are arranged. Each of the stirring blades 27, 27 is a bar-shaped member extending in the horizontal direction from a vertical portion located at the lower end of the short shaft 24 and located below the self-shape provided on the excavation stirring blade 25 on the long shaft 23 side. The rod-shaped member is separated horizontally from the position between them. The agitating blades 27 are arranged at the same pitch on the outer periphery of the short shaft 24 at three locations, respectively, on the same vertical plane as the excavating agitating blades 26.

The excavating shaft driving device 13 includes the guide rail 12
When the long shaft 21 is fitted without being supported by other support members other than being supported by the digging shaft upper end holding device 14 via the long shaft 21 In this state, the excavating shaft upper end holding device 14 can be moved up and down according to the up and down movement (FIG. 1).

In the excavating shaft driving device 13, the same number of motors 31, 31 as the long shaft 23 are disposed at the upper part of the housing, and the power of the motors 31, 31 is transmitted via the planetary gear devices 32, 32. The speed change transmission mechanisms 33, 33 for transmitting the speed to the long shafts 21, 21 are built in the housing (FIG. 2). Each of the long shafts 21 and 2 attached to the excavation shaft drive device 13
A synchronization mechanism 34 that adjusts the long shafts 21 and 21 to rotate in opposite directions at a constant angular velocity is provided at a central portion sandwiched between the two.

The rotary transmission 22 is a speed increasing device that increases the speed of rotation of the long shaft 23 via a speed increasing gear transmission mechanism 22a and transmits the rotation to the short shaft 23. On the other hand, gears are combined so that the short shaft 24, the excavating and stirring blades 26 and the stirring blades 27 can be rotated in directions opposite to each other (FIGS. 2 and 3).

The speed increasing gear transmission mechanism 22a interlocks the internal gear 41 provided on the long shaft 23, the sun gear 42 provided on the short shaft 24, and the internal gear 41 and the sun gear 42. A plurality of planetary gears 43, each of the planetary gears 43 having its center axis fixed by a connecting member 44 connecting the respective rotary transmissions 22, 22, and having a shorter shaft 24 than the number of rotations of the long shaft 23. It is configured to function as a speed-increasing gear whose number of rotations is larger. For example, if the long shaft 23 is 13
In the case of rpm, the short shaft 24 is set to 18.6 rpm.

In addition, the long shaft 21 is used to introduce a cooling liquid for the drilling blade, cement milk kneaded with the excavated soil, a mixed liquid of cement milk and asphalt latex, and other slurries into the long shaft 21. An isolating hollow shaft (not shown) forming a partition for isolating the two-liquid injection path is coaxially arranged, and is connected to the isolating hollow shaft 28 of the long shaft 23 located below the rotary transmission 22. (FIG. 3).

The outer peripheral surface of the long shaft 21 is provided on a boss portion of a gear provided on the speed change transmission mechanism 33 so as to be slidably connected to the speed change transmission mechanism 33 of the drive unit 13. A projecting portion 21a having a substantially rectangular cross section corresponding to a spline or key to be fitted into a concave portion (not shown) corresponding to a plurality of key grooves provided at equal intervals on the circumference is continuously elongated in the axial direction. A plurality of protrusions are formed on the gear boss provided on the speed change transmission mechanism 33 of the drive unit 13 at equal intervals on the circumference and parallel to the center axis (FIG. 2).

The excavating shaft upper end holding device 14 has a shaft end connecting device (not shown) fitted to the upper end of the long shaft 21.
And a liquid injection device (not shown) for introducing a cooling liquid, cement milk or other slurry or the like is provided at the upper end of the shaft end coupling device.

In the ground improvement device of the first embodiment configured as described above, the long shaft 23 positioned below the rotary transmission 22 is provided with the short shaft 24 that rotates in the reverse direction, thereby forming a double shaft. The length of the portion is shortened to reduce the weight of the excavating shaft, the drive system at the top of the excavating shaft can be abolished, the excavating shaft upper end holding device 14 can be reduced in weight, and the center of gravity of the excavating portion in the ground improvement device is lowered, resulting in good stability. In this case, the long shaft 21 for the relay is unified to reduce the weight and the long shaft 21
Can be easily added, the working time can be shortened, and the cost can be reduced.

Second Embodiment Next, FIG. 4 shows an outline of a drive system having a speed reducer according to a second embodiment, and FIG. 5 shows a stirring blade rotating mechanism. At the lower end of the long shaft (drive shaft) 21, a long shaft (drive shaft) 23 having a shape different from that of the long shaft 21 for the splice is connected as a dedicated shaft for excavating blade mounting at a connecting portion (not shown). A rotary transmission 50 is provided on the upper portion of the long shaft 23 so as to be able to transmit power.
A short shaft (driven shaft) 24 meshing via a reduction gear transmission mechanism 50 a provided on the shaft 0 is rotatably fitted to the long shaft 23. The long shaft 21, the long shaft 23, and the short shaft 24 fitted via the rotary transmission 50 form a partially double excavation shaft.

The rotation transmission device 50 includes
Hanging below the connecting member 44 connecting between 0 and 50, the short shaft 24, the excavating stirring blade 26 and the stirring blade 27 can be rotated in the opposite directions to the long shaft 23 and the excavating stirring blade 25. Combine gears as you can.

The reduction gear transmission mechanism 50a links the sun gear 51 provided on the long shaft 23, the internal gear 52 provided on the short shaft 24, and the sun gear 51 and the internal gear 52. The planetary gears 53 are fixed at a center axis by a connecting member 44 connecting the rotary transmissions 50 to each other. It is possible to function as a speed reducer in which the rotation speed of the short shaft 24 is smaller. For example, when the long shaft 21 is 19 rpm, the short shaft 23 is set to 11.8 rpm. The other parts are configured in the same manner as in the first embodiment.

In the ground improvement device of the second embodiment having the above-described configuration, the long shaft 23 positioned below the rotary transmission 50 is externally fitted with the short shaft 24 that rotates in the reverse direction while reducing the speed. The rotation of the short shaft 24 is slower than the shaft 23,
During excavation and agitation, a large torque can be applied to the excavation and agitating blades 26 and the agitating blades 27 provided on the short shaft 24, so that the excavation and agitation efficiency can be improved and the work efficiency can be improved.

[Third Embodiment] FIG. 6 shows an outline of a drive system including a rotary transmission having a spur gear transmission mechanism according to a third embodiment, and FIG. 7 and FIG. 8 show the gear arrangement as viewed from the arrow B in FIG.

At the lower end of the long shaft (drive shaft) 21, a long shaft (drive shaft) 23 having a shape different from that of the intermediate long shaft 21 is connected by a connecting portion (not shown) as a dedicated shaft for mounting a cutting blade. A rotary transmission device 60 is provided on the upper portion of the long shaft 23 so as to transmit power, and a short shaft (driven shaft) 24 meshing via a spur gear transmission mechanism 60a provided on the rotary transmission device 60 is long. The outer shaft is rotatably fitted to the measuring shaft 23. The long shaft 21, the long shaft 23, and the short shaft 24 externally fitted via the rotary transmission 60 form a partially double excavation shaft.

The rotary transmission device 60 has a structure in which the short shaft 24 and the excavation stirring blade 26
In addition, spur gears provided in the spur gear transmission mechanism 60a are combined so that a stirring blade (not shown) can be rotated in directions opposite to each other.

The spur gear transmission mechanism 60a includes a large-diameter gear 61 provided on the long shaft 23, a small-diameter gear 62 provided on the short shaft 24, and a plurality of first gears meshing with the large-diameter gear 61. The first intermediate gears 63, 63 are composed of intermediate gears 63, 63, and a plurality of second intermediate gears 64, 64 meshing with the small diameter gear 62 and meshing with the intermediate gears 63, 63.
The second intermediate gears 64, 64 are fixed in position by being pivotally supported by a gear box 65, and the gear box 65 is fixed in position by a connecting member 44 that connects between the rotary transmissions 60, 60.

A base end located above the stirring members 66, 66 rotating on the outer peripheral side of the rotary transmission 60 is fixed above the position where the long shaft 23 is disposed in the gear box. The stirring member 66 is horizontally separated from the position where the long shaft 23 is fixed, and hangs down from the position beyond the outer peripheral surface of the gear box 65 by a suitable distance to a position substantially vertically below and close to the connecting member 44. Then, projecting members 66b, 66b are protruded from the gear box 65 at the lower end of the vertically suspended portion 66a and at an arbitrary height. The other parts are configured in the same manner as in the first embodiment.

In the ground improvement device of the third embodiment configured as described above, since the rotary transmission 60 is fixed to the connecting member 44, the rotary transmission 60 rotates with the long shaft 23 to stir the outer periphery of the gear box 65. A stirring member 66 can be provided, so that the periphery of the rotary transmission 60 can be stirred and softened during excavation, and can be more easily moved up and down.

[Alternative Embodiments] These embodiments are specifically described for better understanding of the present invention, and therefore do not limit other embodiments, but may be modified as long as the spirit of the present invention is followed. You may. For example, the excavating shaft drive device 13 is formed integrally with the excavating shaft upper end holding device 14,
By transmitting the driving force only from the top end of the drilling axis,
It may be simplified. In addition, the number of excavating axes for one reader can be arbitrarily selected, and an excavator equipped with only one excavating axis or an excavator equipped with three or more excavating axes may be used.

[0037]

As described above, in the ground improvement apparatus according to the first aspect of the present invention, the drive shaft that can be extended, the dedicated shaft for mounting the digging blade connected to the drive shaft, and the dedicated shaft for mounting the digging blade are described. Since a partially double excavation axis can be formed by a short driven shaft rotatably fitted, the excavation axis is localized at the tip of the excavation axis, simplifying the configuration of the excavation axis and reducing the weight. In addition, by extending only the drive shaft, it can be extended, which makes it easy to handle and improves workability. Since it is possible to reversely transmit to the driven shaft through the dedicated shaft and the rotation transmission device, excavation and stirring can be performed efficiently, and the configuration, manufacturing,
In addition, handling can be simplified and costs can be reduced.

Further, in the ground improvement device according to claim 2,
The partial double excavation shaft is mounted on one reader as a pair of left and right, and a synchronous mechanism for rotating the respective drive shafts of the partial double excavation shaft in opposite directions to the excavation shaft driving device is provided. By connecting the rotary transmission devices provided on each of the excavating blade mounting dedicated shafts of the double excavating shaft integrally by a connecting member, the center of gravity of the excavated portion in the dual ground improvement device is lowered, and the stability is improved, and And the weight of the drive shaft is reduced, the work of adding the drive shaft becomes easy, the excavation and stirring work can be shortened, and the cost can be reduced.

Further, in the ground improvement device according to claim 3,
The rotation transmission device is equipped with a speed increasing gear transmission mechanism, which increases the speed of the driven shaft from the dedicated shaft for mounting the excavation blade and rotates it in the reverse direction, preventing the excavated soil from rotating together and improving the efficiency of the excavated soil after excavation. Stir well and work efficiency can be improved.

Further, in the ground improvement apparatus according to claim 4,
The rotation transmission device is provided with a reduction gear transmission mechanism, so that the driven shaft is reduced in speed and meshes with the excavating blade mounting-dedicated shaft so as to rotate in the reverse direction, thereby rotating the driven shaft more than the excavating blade-mounted shaft. By slowing down, a large torque can be given to the driven shaft at the time of excavation and agitation, the efficiency of agitation and excavation can be improved, and the work efficiency can be improved.

Further, in the ground improvement device according to claim 5,
The rotation transmission device is provided with a spur gear transmission mechanism and a stirrer for stirring the outer peripheral side of the rotary transmission device is provided on a shaft dedicated to the excavation blade. The periphery of the device can be agitated, and the periphery of the rotary transmission can be agitated and softened during excavation, so that the device can be more easily moved up and down.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a ground improvement device according to an embodiment of the present invention, wherein (a) is a side view and (b) is a front view.

FIG. 2 is an explanatory diagram of a drive system showing the ground improvement device of the first embodiment according to the present invention.

FIG. 3 is a side sectional view showing a stirring blade rotating mechanism of the ground improvement apparatus of the first embodiment according to the present invention.

FIG. 4 is an explanatory view of a drive system showing a ground improvement device according to a second embodiment of the present invention.

FIG. 5 is a side sectional view showing a stirring blade rotating mechanism of a ground improvement apparatus according to a second embodiment of the present invention.

FIG. 6 is a side sectional view showing a stirring blade rotating mechanism of a ground improvement apparatus according to a third embodiment of the present invention.

FIG. 7 is a gear layout diagram as viewed in the direction of arrow A in FIG. 6;

FIG. 8 is a gear arrangement diagram as viewed in the direction of arrow B in FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Base machine 11 Leader 12 Guide rail 13 Excavation axis drive device 14 Excavation axis upper end holding device 15a, 15b, 15c Guide pulley 16 Wire rope 17 Excavation axis elevation device 20 Excavation axis 21 Long axis (drive axis) 22 Rotary transmission device 22a Speed-increasing gear transmission mechanism 23 Long shaft (exclusive shaft for mounting the excavating blade) 24 Short shaft (driven shaft) 25 Excavating and stirring blade 26 Excavating and stirring blade 27 Stirring blade 31 Electric motor 33 Speed change transmission mechanism 34 Synchronization mechanism 44 Connecting member 50 Rotary transmission device 50a Reduction gear transmission mechanism 60 Rotary transmission device 60a Spur gear transmission mechanism 66 Stirring member

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yukei Baba 2060 Shiroyama, Kamiwada, Yamato-shi, Kanagawa Prefecture Inside Tigicity Engineering Co., Ltd. (72) Inventor Hiroyuki Egasa 1293 Amando-cho Hanamigawa-ku, Chiba-shi (72) Inventor Yusuke Tanaka Inventor: 1293, Adocho, Hanamigawa-ku, Chiba-shi, Chiba

Claims (5)

[Claims] 1. A ground improvement device for providing excavating and stirring blades on inner and outer shafts of a double excavating shaft, and for excavating and stirring each of the excavating and stirring blades during excavation to stir excavated soil. A shaft, a dedicated cutting blade mounting shaft detachably connected to the lower end of the drive shaft, and a driven shaft shorter than the dedicated cutting blade mounting shaft rotatably fitted to the dedicated cutting shaft mounting shaft. An excavation shaft driving device that forms a partial double excavation shaft, and that rotationally drives the drive shaft; and a rotational driving force transmitted from the drive shaft to the excavation blade attachment-dedicated shaft is driven by the excavation blade attachment-dedicated shaft. A ground improvement device, comprising: a rotation transmission device that transmits the rotation to a shaft. 2. A synchronous system in which the partial double excavation shaft is mounted on a single reader as a pair of left and right, and the excavation shaft driving device drives each of the partial double excavation shafts to rotate in opposite directions. The ground improvement device according to claim 1, further comprising a mechanism, wherein the rotary transmission devices provided on each of the shafts dedicated to mounting the digging blade of the partial double digging shaft are integrally connected by a connecting member. 3. The ground improvement device according to claim 1, wherein the rotation transmission device is provided with a speed increasing gear transmission mechanism. 4. The ground improvement device according to claim 1, wherein the rotation transmission device is provided with a reduction gear transmission mechanism. 5. The rotary transmission device according to claim 1, wherein a spur gear transmission mechanism is provided, and a stirrer for stirring the outer peripheral side of the rotary transmission device is provided on the excavating blade mounting-dedicated shaft. The ground improvement device as described.