JPH09316868A - Rotary type solidifier discharging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a discharging device in which powder of solidifier can be uniformly mixed with the ground, and in which the powder of the solidifier is not choked at a solidifier discharge port. SOLUTION: Wide agitation blades 16A and narrow agitation blades 16B for cutting the ground, and agitating and mixing it are alternately disposed in plurality on outer circumferential surfaces of chains 15A, 15B stretched endlessly, a solidifier pressure-feed pipe 19 to feed powder or milk of solidifier such as lime or cement from an unillustrated hopper is disposed between the chains 15A, 15B, and a rotary type solidifier discharging device 20 is provided at a tip part of the solidifier pressure-feed pipe 19. The agitation blades 16A, 16B agitate the ground by rotation of the chains 15A, 15B, and the solidifier is uniformly discharged from a discharge port 25 provided on a rotation part 23 of the rotary type solidifier discharging device 20 into the ground.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solidifying material discharging device used in a ground improving machine for stirring and mixing powder or milk of a solidifying material for improving the ground into the ground.

[0002]

2. Description of the Related Art Conventionally, as a ground improvement machine having a solidifying material discharging device for agitating and mixing a solidifying material for improving soft ground, a ground as disclosed in JP-A-7-158054 is disclosed. Improved machines are known. As shown in FIG. 9, this ground improvement machine is provided with a digging device 104 at the tip portion 103 of the arm 102 of the backhoe 101, drops the digging device 104 into the ground, agitates the ground, and discharges the solidifying material into the ground. The solidifying material powder and milk are discharged and mixed from the apparatus 104A.

As shown in FIG. 10, an excavator 104 of this ground improvement machine has a pair of left and right side plates 106A and 106B provided on a machine frame 105 attached to a tip 103 of an arm 102, and is supported by the side plates 106A and 106B. Frame 107A,
107B, respectively, and drive sprockets 108A, 108B provided on the upper part of the machine frame 105 and the support frame 107.
A driven sprocket 109 provided at the lower end of A, 107B
Chains 110A and 110B are installed between A and 109B, respectively. A plurality of wide stirring blades 111 and a plurality of narrow stirring blades 112 are alternately arranged on each of the chains 110A and 110B.
The rotation of the ground excavates and mixes the ground.

The pair of left and right chains 110A, 110
A solidifying material pressure-feeding pipe 113 for supplying the solidifying material of the ground from a hopper (not shown) is provided between B and the solidifying material pressure-feeding pipe 1
A solidified material discharge unit 114 is provided at the tip of the solid line 13. The solidifying material (not shown) is discharged and mixed into the ground as the chains 110A and 110B rotate.

At this time, in order to uniformly discharge the solidifying material into the ground, the solidifying material is evenly supplied to the lower ends of the chains 110A and 110B provided with the driven rollers 109A and 109B. It is necessary to use the solidified material discharging portion 114 shown in FIG. 11 which has a V-shaped solidified material discharging portion 114A or the flattened funnel-shaped solidified material discharging portion 114B which is shown in FIG.

C-shaped solidified material discharge portion 1 shown in FIG.
In the case of 14A, the solidified material discharge ports 115A, 115B have the same thickness, and the pair of left and right chains 110A, 110
There is a feature that they are opposed to the lower end portions of B and that the solidifying material can be discharged to the lower portions of the chains 110A and 110B one by one. Further, in the case of the flat funnel-shaped solidified material discharge portion 114B shown in FIG.
Is spreading downwards, so chain 110A,
There was a feature that the solidified material could be discharged to the lower part of 110B so as to spread.

[0007]

However, FIG.
In the case of the C-shaped solidified material discharge portion 114A shown in FIG.
Discharge ports 115A, 11 in which the discharge ports of the solidified material are open in a V shape.
5B and discharge ports 115A and 115
The opening diameter of B was considerably smaller than that of the solidifying material supply pipe 113. Accordingly, the discharge port 115A, the powder solidifying material made of cement or the like, which is easily solidified by moisture or the like,
There is a problem that any one of the 115B is likely to be clogged, and the powder solidifying material is not uniformly supplied to the lower parts of the pair of left and right chains 110A and 110B.

Further, in the case of the flattened funnel-shaped solidified material discharge portion 114B shown in FIG. 12, the solidified material discharge range is limited by the opening diameter of the discharge port 116, and the solidified material discharge range is narrowed. there were.

As described above, the conventional solidifying material discharging device has a problem that the ground to be agitated and mixed and the powder of the solidifying material are not uniformly mixed, and the purpose of the ground improvement cannot be sufficiently achieved. .

[0010] Therefore, an object of the present invention is to provide a rotary solidifying material discharging device in which the solidifying material and the ground can be mixed uniformly and the solidifying material powder is not clogged at the solidifying material discharge port. To do.

[0011]

In order to achieve such an object, in the rotary type solidified material discharging device of the present invention, an excavating device that descends into the ground and stirs and mixes the ground, and is mounted on the excavating device. , A solidified material pumping tube for feeding the solidified material discharged into the ground, a solidified material discharge part rotatably provided at the tip of the solidified material pumping tube, and a rotation for rotating the solidified material discharge part And means. With this configuration, since the solidified material discharging unit rotates to discharge the solidified material into the ground, the solidified material is uniformly added to the ground, and the solidified material can be uniformly mixed into the ground.

Further, in the rotary solidified material discharging device of the present invention, the excavating device has a pair of left and right sprockets above and below a support frame of the excavating device, and a pair of left and right endless parts is provided between the upper and lower sprockets. -Shaped chains are respectively erected, a plurality of ground stirring blades are respectively provided on the chains, and the soil is stirred and mixed by rotating the chains. It may be arranged between the chains so that it can rotate 360 degrees at the tip portion of the solidified material pressure-feeding pipe, and the tip of the solidified material discharge portion has one discharge port. With such a configuration, the solidified material discharge part having one discharge port is
Since the tip of the solidifying material pressure-feeding pipe rotates 360 degrees, the discharge port is not clogged with the solidifying material or soil, and the solidifying material can be uniformly mixed in the ground. Furthermore, the solidified material discharge part rotates 360 degrees at the tip of the solidified material pressure feed pipe, so that the soil adhering to the vicinity of the discharge port can be removed by the rotational movement of the solidified material discharge part.

Further, in the rotary solidified material discharging device of the present invention, the solidified material discharging portion has a pipe extending in a direction orthogonal to the longitudinal direction of the solidified material pressure-feeding pipe, and the tip of the pipe. The discharge port may be opened in a portion in a direction opposite to the rotation direction of the solidified material discharge portion. With such a configuration, it is possible to prevent the soil and the like from entering the discharge port due to the rotation of the solidified material discharge unit.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the rotary solidifying material discharging device of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, in a ground improvement machine using the rotary solidified material discharge device 1 of the present embodiment, a movable arm 4 is extended to a self-propelled backhoe 3 having a crawler 2. An excavator 6 is installed at the tip 5 of the arm 4 and descends into the ground to stir and mix the ground. The excavator 6 has a rotary solidified material discharge device 1 mounted thereon.

As shown in FIGS. 1 and 2, the excavator 6 is provided with a gate-shaped machine frame 7 at the tip 5 of the arm 4, and the machine frame 7 is provided with side plates 7A and 7B on the left and right. It is provided in a pair. A drive shaft 8 is mounted on the side plates 7A and 7B, and a drive motor 9 that rotationally drives the drive shaft 8 is provided on the side plate 7A of the machine frame 7. A pair of left and right drive sprockets 10A and 10B are fixed to the drive shaft 8. On the side plates 7A and 7B of the machine frame 7, the horizontal frame 1 is provided in the middle stage.
1. A horizontal frame 12 is horizontally installed in the lower stage.
Further, the support frames 13A and 13B are suspended at positions corresponding to the pair of left and right drive sprockets 10A and 10B. Driven sprockets 14A and 14B are axially attached to the lower ends of the support frames 13A and 13B.

Chains 15A and 15B are respectively stretched endlessly between the drive sprockets 10A and 10B and the driven sprockets 14A and 14B, and the ground is formed on the outer peripheral surfaces of the chains 15A and 15B. Wide stirring blade 16A and narrow stirring blade 16 for excavating and stirring
A plurality of Bs are alternately arranged. In addition, the support frame 13
Auxiliary sprockets 17A, 17B, 18A, 18 for tensioning the chains 15A, 15B are provided on A, 13B.
B is provided for each.

Between the chains 15A and 15B, a solidifying material pumping pipe 19 for feeding powder of solidifying material such as cement or lime or milk from a hopper (not shown) is provided in the support frame 13.
A rotary solidified material discharge device 20 is provided at the tip of the solidified material pressure-feeding pipe 19 which is disposed in parallel with A and 13B. The rotary solidified material discharge device 20 is supported by a horizontal frame 21 which is horizontally provided at the lower ends of the support frames 13A and 13B.

Next, the rotary solidified material discharge device 20 will be described with reference to FIGS. 3 is a front view of the rotary solidified material discharging device 20, FIG. 4 is a bottom view of the rotary solidified material discharging device 20, and FIG. 5 is a cross-sectional view taken along the arrow AA ′ in FIG. Is. As shown in FIG. 3, the rotary solidifying material discharging device 20 is
A base portion 22 supported by a horizontal bridge 21 shown in FIG. 2 and a rotating portion 23 fitted to the base portion 22 so as to be rotatable 360 degrees.
And a hydraulic motor 24 which is provided on the base portion 22 and drives the rotating portion 23. Here, the solidified material pressure-feeding pipe 19 is fixed to the central portion of the upper surface of the base portion 22, and the rotating portion 23 discharges the solidified material fed by the solidified-material pressure feed pipe 19 into the ground. One 25 is provided. The rotating portion 23 has an arrow B shown in FIG.
Since it rotates in the direction, the opening 25A of the discharge port 25 opens in the direction opposite to the rotating direction of the rotating unit 23.

Next, with reference to FIG. 5, the internal structure of the rotary type solidified material discharging device 20 corresponding to the solidified material discharging portion of the present invention will be described. Rotary solidification material discharge device 2
A hollow pipe portion 26 having an inner diameter substantially the same as that of the solidified material pressure-feeding pipe 19 is formed in the base portion 22 forming the upper structure of 0, and the solidified material pressure-feeding portion is formed at the upper end of the hollow pipe portion 26. The flange 19A of the tube 19 is joined by the bolt 27. A ring-shaped mechanic seal 28 is provided inside the left and right ends of the base 22 to maintain airtightness. A drive shaft 24A extends downward from the hydraulic motor 24 mounted on the upper surface of the base 22, and a pinion gear 29 is fixed to the lower end of the drive shaft 24A.

Next, the rotating portion 23 which constitutes the lower structure of the rotary solidified material discharging device 20 will be described. Rotating part 2
A pipe holder 30 for receiving the hollow pipe portion 26 is provided in the center of the inside of the pipe 3, and ball bearings 31 are arranged in a ring shape on the upper and lower portions of the pipe holder 30, respectively.
The rotary portion 23 is rotatably supported by 360 degrees with the hollow pipe portion 26 as a rotation axis. Further, a flange portion 32 having a diameter substantially the same as the outer circumference of the base portion 22 is provided on the rotating portion 23, and a mechanical seal 28 of the base portion 22 is provided above the flange portion 32 to maintain airtightness. A ring-shaped mechanic seal 33 is held by a seal receiver 32 </ b> A at a position opposed to. An internal gear 34 that meshes with the pinion gear 29 fixed to the drive shaft 24A of the drive motor 24 is provided between the seal receiver 32A and the flange 32, and the flange 32 and the internal gear 34 are provided. 34 and seal receiver 32
A is integrally fastened by a bolt 32B.

Further, the rotating portion 23 comprises a body portion 23A joined to the flange portion 32 and a bottom plate 23B for closing the bottom of the body portion 23A. The bottom plate 23B is a bolt 23C.
It is fixed to the body portion 23A by.

A seal receiver 36 for holding a mechanical seal 35 is fixed around the lower portion of the pipe receiver 30 to prevent escape of the pressure of the solidifying material pumped in the hollow pipe portion 26. There is. In addition, this seal holder 3
A seal receiver 38 for holding the mechanical seal 37 is fixed to the lower end of the hollow pipe portion 26 with a bolt 40 via a member 39 at a lower position opposite to 6. Since the mechanic seal 37 held by the seal receiver 38 and the mechanic seal 35 on the pipe receiver 30 side are in pressure contact with each other, the pressure of the solidified material pumped in the hollow pipe portion 26 is prevented from leaking, and the base portion 22 is prevented. The turning portion 23 is prevented from falling off.

Here, in the central portion of the seal receiver 38,
The solidified material sent under pressure in the hollow pipe 26 is used as the lower pipe portion 4.
1, a circular opening 38A for feeding to 1 is formed, and a discharge pipe 25B that forms the discharge port 25 vertically from the side surface of the lower pipe portion 41 is projected in the outer peripheral surface direction of the body portion 23A of the rotating portion 23. The tip of the discharge pipe 25B forms a discharge port 25 in the rotating part 23, and as shown in FIGS. 3 and 4, the opening 25A of the discharge port 25 has a rotation direction of the rotating part 23 (shown in FIG. 4). It is formed in the direction opposite to the arrow B direction).

Next, the pinion gear 29 on the base 22 side and the internal gear 34 on the rotary unit 23 side will be described with reference to FIGS. 6 and 7.

FIG. 6 is a bottom view of the base portion 22. As shown in FIG. 6, a pinion gear 29 fixed to the drive shaft 24A of the hydraulic motor 24 is rotatably provided on the bottom surface of the base portion. Further, FIG. 7 shows a seal receiver 32A of the rotating portion 23.
It is a top view which shows the state which removed. The rotating part 23
A flange portion 32 is provided on the upper surface of the flange portion 32, and an internal gear 34 is mounted on the upper surface of the flange portion 32. The internal gear 34 has eight bolt holes 34A through which the fastening bolts 32B pass. Here, the flange portion 3
The outer diameter of 2 and the outer diameter of the internal gear 34 and the seal receiver 32A are formed to be substantially the same, and the flange portion 32, the internal gear 34, and the seal receiver 34 are integrally fastened by the fastening bolt 32B.

As can be seen from the above description, the base 22
Also, the hollow pipe portion 26 provided on the base portion 22 does not rotate, and the body portion 23A, the bottom plate 23B, the flange portion 32, the internal teeth 34, which constitute the rotating portion 23 provided below facing the base portion 22, constitute the rotating portion 23. The seal receiver 32A, the seal receiver 36, the discharge port 25 and the like are configured to freely rotate 360 degrees by driving the drive motor 24 with the hollow pipe portion 26 as the rotation axis.

Next, the operation of the rotary solidified material discharge device having the above-mentioned structure will be described.

When performing ground improvement work, the backhoe 3 is moved to the work place by the operation of the operator, and the excavation device 6 is erected vertically on the ground by the operation of the arm 4. Then, the drive motor 9 is rotated by the operation of the operator, and the drive sprockets 10A and 10B fixed to the drive shaft 8 of the drive motor 9 rotate around the drive shaft 8 as the rotation axis, and the chains 15A and 15B are driven. Sprocket 14A, 14B and auxiliary sprocket 17A, 1
7B, 18A, and 18B guide and rotate. Therefore, the stirring blades 16A and 16B provided in the chains 15A and 15B scrape the ground, and the excavator 6 descends into the ground.

At this time, pressurized oil is supplied to the hydraulic pump 24 from a hydraulic device (not shown), the drive shaft 24A of the hydraulic pump 24 rotates, and the pinion gear 29 fixed to the drive shaft 24A is shown in FIG. 7 rotates in the arrow C direction, and the internal gear 34 that meshes with the pinion gear 24A rotates in the arrow D direction shown in FIG. Therefore, the seal receiver 32A and the flange portion 32 that are integrated with the internal gear 34 that constitutes the rotating portion 23, the body portion 23A joined to the flange portion 32, and the discharge port 25 provided in the body portion 23A. , And the bottom plate 23B, etc., with the hollow pipe portion 26 as the axis of rotation,
It rotates integrally in the direction of arrow B shown in FIG. Here, as an example of the rotation speed, the hydraulic motor 24 is 330 rpm,
The rotating part 23 is 65 rpm.

At this time, a solidifying material of powder such as cement or lime is pressure-fed into the hollow pipe portion 26 from the hopper (not shown) through the solidifying material pressure feeding pipe 19.
The solidified material of the powder is sent from the opening 38A of the seal receiver 38 to the lower pipe portion 41, is discharged through the discharge pipe 25B, and is discharged from the only opening 25A of the discharge port 25. Here, since the rotating part 23 continues to rotate, the powder solidifying material is uniformly discharged and discharged into the ground. Further, the powdered solidifying material can be evenly discharged left and right to the lower portions of the pair of left and right chains 15A and 15B. Therefore, the stirring blades 16A provided on the chains 15A and 15B,
The powder solidifying material can be uniformly discharged and mixed into the ground that is agitated by 16B.

In addition, in the rotary solidified material discharge device of the present embodiment, since the solidified material discharge port 25 has only one opening 25A, and the opening diameter thereof can be ensured to be sufficiently large, the powder It is possible to prevent the opening 25A from being clogged with the solidified material.

Further, since the rotating portion 23 is rotated 360 degrees, even if highly viscous soil or the like adheres, it can be removed by the rotational movement, and the soil adheres to the vicinity of the discharge port 25, The opening 25A will not be closed.

The present invention is not limited to the above embodiment, and various modifications can be made.

For example, a bent pipe 50 as shown in FIG. 8 may be rotated by a hydraulic motor 51 instead of the rotating portion 23 used in the above-described embodiment.

Further, in the above-mentioned embodiment, the number of the discharge port is one, but the number is not limited to one, and even the one having a plurality of discharge ports can obtain the effect of uniformly discharging the solidifying material by the rotation. To be

Further, in the above embodiment, the case of discharging the powder solidifying material has been described, but the present invention can obtain a sufficient effect not only for powder but also for milky solidifying material. it can.

[0038]

As described above, in the rotary type solidified material discharging device of the present invention, since the solidified material discharging portion is rotated and the solidified material is discharged into the ground, the solidified material is discharged into the ground. The diffusion effect is enhanced, and the solidifying material can be uniformly discharged and mixed into the ground.

If the solidified material discharge part having one discharge port is rotated 360 degrees at the tip of the solidified material pressure feed pipe, the opening diameter of the discharge port can be made sufficiently large. Since the discharge port is not clogged with the solidifying material and the solidifying material discharging portion rotates 360 degrees, the solidifying material can be uniformly discharged and mixed into the ground.

Further, by rotating the solidified material discharging section by 360 degrees, even if highly viscous soil or the like adheres to the vicinity of the discharge port of the solidified material discharging section, it can be removed by a rotary motion.
There is an effect that the discharge port can be prevented from being blocked by the soil that has adhered.

Further, the solidified material discharge portion has a pipe extending in a direction orthogonal to the longitudinal direction of the solidified material pressure-feeding pipe,
In the case where the discharge port is opened at the tip of the pipe in the direction opposite to the rotation direction of the solidified material discharge portion, the discharge port is not opened in the rotation direction, so the solidified material is not formed. It is possible to prevent the soil of the ground from entering the discharge port due to the rotation of the discharge unit.

When the mixing time referred to in ground improvement is divided into stirring and mixing, the weight required for stirring is large in the case of conventional fixed position injection, but the rotary solidifying material discharge device of the present invention is used. In this case, since the diffusion effect is high, the mixed portion can be made sufficiently dense, which has the unique effect of increasing the mixing property.

[Brief description of drawings]

FIG. 1 is a perspective view of a soil improvement machine in which a rotary solidified material discharge device according to an embodiment of the present invention is used.

FIG. 2 is a front view of a rotary solidified material discharge device according to an embodiment of the present invention.

FIG. 3 is a partially enlarged view of the rotary solidified material discharge device according to the embodiment of the present invention.

FIG. 4 is a bottom view of the rotary solidified material discharge device according to the embodiment of the present invention.

FIG. 5 is a partial cross-sectional view of a rotary solidified material discharge device according to an embodiment of the present invention.

FIG. 6 is a bottom view of a base used in the rotary solidified material discharging device according to the above-described embodiment.

FIG. 7 is a plan view of a rotary body used in the rotary solidified material discharge device of the above embodiment.

FIG. 8 is a perspective view showing another embodiment of the present invention.

FIG. 9 is a side view of a soil improvement machine in which a conventional solidifying material discharging device is used.

FIG. 10 is a perspective view of a soil improvement machine in which a conventional solidifying material discharging device is used.

FIG. 11 is a perspective view showing a solidified material discharging portion of a conventional solidified material discharging device.

FIG. 12 is a perspective view showing a solidified material discharging portion of a conventional solidified material discharging device.

[Explanation of symbols]

 6 Excavator 10A, 10B Drive sprocket 13A, 13B Support frame 14A, 14B Driven sprocket 15A, 15B Chain 16A, 16B Stirring blade 19 Solidified material pressure feed pipe 20 Rotary solidified material discharge device 22 Base 23 Rotating part 24 Hydraulic motor 25 Discharge port 25A Opening 25B Discharge pipe

Claims (3)

[Claims] 1. A drilling device that descends into the ground to stir and mix the ground, a solidifying material pressure-feeding pipe that is mounted on the drilling device and that feeds the solidifying material discharged into the ground, and the solidifying material pressure feed. A rotary solidified material discharge device comprising: a solidified material discharge unit rotatably provided at a tip of a pipe; and rotating means for rotating the solidified material discharge unit. 2. The excavation device has a pair of left and right sprockets above and below a support frame of the excavation device, and a pair of left and right endless chains are installed between the upper and lower sprockets, respectively. A plurality of ground agitating blades are respectively provided, and the soil is agitated and mixed by rotating the chain, wherein the solidifying material discharge unit is arranged between the pair of left and right chains, and The rotary solidified material discharge device according to claim 1, wherein the solidified material pressure-feeding pipe can be rotated 360 degrees at a tip portion thereof, and the solidified material discharge portion has a single discharge outlet. 3. The solidified material discharge portion has a pipe extending in a direction orthogonal to the longitudinal direction of the solidified material pressure-feeding pipe, and the discharge port is provided at a tip end portion of the solidified material discharge pipe. The rotary solidified material discharging device according to claim 1 or 2, wherein the rotary solidified material discharging device is opened in a direction opposite to a rotating direction of the portion.