JPH0729016U - Soft ground agitator and agitating blade used for it - Google Patents

Abstract

(57) [Summary] [Purpose] In a soft ground agitator used for soil improvement,
Even if the stirrer blade hits a hard object during work, the stirrer blade and the machine are less likely to be damaged, and vibration and noise during work are reduced. [Structure] The soft ground agitator A has an underframe 1. Support frames 2 and 2 are provided on the underframe 1, and a stirring unit 3 is attached to the lower ends of the support frames 2 and 2. Stirring unit 3
Has a rotary shaft 30, and the drive mechanism section 4 is provided on one end side of the rotary shaft 30. The drive mechanism unit 4 has a hydraulic motor 42 that drives the rotary shaft 30 via a chain 44. The chain 44 is closed by a chain cover 45. Eight stirring blades 31 are radially provided on the circumference of the rotating shaft 30 while the mounting base is spirally shifted by 90 °. The stirring blade 31 has a blade main body 32, and a stirring plate 36 and a cemented carbide blade 33 are attached to the tip of the blade main body 32.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a soft ground agitator and a stirrer blade used for soft soil such as riverbeds and swamp beds, which are used for soil improvement to enable construction of structures and entry of heavy machinery.

[0002]

[Prior art]

 For example, when constructing a structure on soft ground such as a riverbed or a swamp floor, it is necessary to first improve the soil quality of the construction site so that heavy equipment such as a pile driver and backhoe can be loaded. A soft ground agitator is used to improve the soil quality. With this, soil is improved by mixing a solidifying agent such as cement while stirring the ground.

As a general structure of a soft ground agitator, there is a structure shown in Japanese Utility Model Publication No. 63-46513. As shown in FIG. 6, this soft ground agitator can be attached to the arm tip of a working machine, and a rotary shaft 62 driven by a hydraulic motor 61 via a chain 67 is provided at the tip of the base frame 60. The rotary shaft 62 is provided with four sets of gate-shaped blade dies 63, and further, a stirring plate 64 parallel to the rotary shaft 62 at its tip is provided with large and small cutting blades 65, 66.

[0004]

[Problems to be solved by the device]

 However, the above-mentioned conventional soft ground agitator has the following problems. (A) The stirring plate 64 and the cutting blades 65, 66 at the tip of the blade frame 63 are provided parallel to the rotating shaft 62. In this structure, when the rotating shaft 62 is driven, the stirring plate 64 of each blade frame 63 and the cutting blades 65 and 66 contact the surface of the soft ground almost at the same time. Is loaded with a large amount of load all at once, and this is repeated, and in extreme cases, the machine jumps. Further, for example, when the blade frame 63 hits a foreign substance such as a stone inside the ground during stirring, the blade frame 63 is a frame body having high rigidity structurally, so that the blade frame 63 cannot be escaped and is damaged at once. Therefore, there is a problem in the life of the entire machine.

(B) The chain case 68 that covers the chain 67 that transmits the rotational force of the hydraulic motor 61 to the rotary shaft 62 is provided so as to project outside the base frame 60. Therefore, the resistance to immersing the soft ground agitator into the ground increases by that much, and the load on the machine is large and the work efficiency is poor. (C) The cutting blades 65 and 66 have been hardened, but they cannot be said to have sufficient hardness. Therefore, the blades are heavily worn during use, and the cutting blades 65, 66 may be deformed or damaged by hitting a stone or the like, which makes replacement and repair for each work troublesome.

[0006]

[Means for Solving the Problems]

 Means of the present invention taken to solve the above problems are as follows. The first invention is a soft ground agitator used for soil improvement of soft ground. The agitator is provided on the underframe that can be attached to the arm of the working machine, and the underframe. The agitator includes a support frame, a stirring unit attached to the support frame, and a drive mechanism unit that drives the agitator unit. The agitator unit irradiates the rotary shaft and the mounting base in a spiral shape on the rotary shaft. It is a soft ground agitator having a required number of agitating blades, which are provided in the shape of a blade and have a superhard blade at the blade edge.

A second invention is the soft ground agitator according to the first invention, in which the chain case of the drive mechanism is housed inside the support frame.

A third aspect of the invention is the soft ground agitator according to the first or second aspect, in which the agitation units are provided in multiple stages.

In the fourth invention, each agitating unit is rotatably supported by a supporting frame provided in multiple stages, and the supporting frame is connectable and separable. In the soft ground agitator according to the third invention, is there.

In the fifth invention, the stirring blade is composed of a blade main body and a cemented carbide blade, and a cylindrical mounting portion is provided at the tip of the blade main body, and the cemented carbide blade is inserted into the mounting portion. A stirring blade for a soft ground agitator that can be fixed and removed.

[0011]

[Action]

 The stirring blades of the stirring unit are radially arranged on the rotating shaft in such a manner that the attachment base part draws a spiral, and in contact with the ground surface in order when it is immersed in the ground. Therefore, a large load is not applied at one time, the load on the drive mechanism section such as the hydraulic motor and the entire agitator is reduced, and the generated vibration and noise can be suppressed. Even if the stirring blade hits foreign matter such as stones inside the ground, it is easy to escape because it is a single body, and since the cemented carbide blade at the tip of the stirring blade has sufficient hardness, it will not be deformed or damaged. Hateful.

In the case where the chain case of the drive mechanism unit is housed inside the support frame, since the overhanging portion is reduced, the movement resistance of the stirrer in the ground is reduced. In the case where the agitation unit is provided in multiple stages, the agitation can be efficiently performed even when the ground of the construction site is deep. In the case where the agitating unit is pivotally supported and the supporting frames provided in multiple stages can be connected and separated, the number of agitating units can be adjusted according to the depth of the ground at the construction site. In a stirring blade in which the cemented carbide blade can be inserted, fixed and removed from the blade-based mounting portion, the stirring blade having the cemented carbide blade can be easily formed.

[0013]

【Example】

 The present invention will be described in more detail based on the embodiments shown in the drawings. FIG. 1 is a perspective view showing a first embodiment of a soft ground agitator according to the present invention mounted on an arm of a working machine, and FIG. 2 is an exploded perspective view of a main part showing a structure of a stirring blade. Reference numeral A is a soft ground agitator having an underframe 1. Attachment frames 11 are provided at two locations on the underframe 1 so as to face each other. The underframe 1 is attached to the front end of the arm 9 of the working machine M (see FIG. 3) by axially attaching the attachment base piece 11 with the attachment pins P. Further, the underframe 1 can be rotated and adjusted via an operating arm 91 driven by a hydraulic cylinder S.

Support frames 2 and 2 are vertically provided on both sides of a lower portion of the underframe 1. A stirring unit 3 is attached to the lower ends of the support frames 2 and 2. The stirring unit 3 has a rotary shaft 30 axially supported between the support frames 2 and 2, and a drive mechanism section 4 is provided on one end side of the rotary shaft 30. The drive mechanism unit 4 is provided on the underframe 1 and has a hydraulic motor 42 that works via an oil line L of the work machine M. A sprocket 43 is attached to the drive shaft, and a chain 44 is wound around the sprocket 43 and the sprocket 41 attached to one end of the rotary shaft 30. The sprockets 41, 43 and the chain 44 are almost sealed by a chain cover 45 so that dirt or the like is not caught.

Eight stirring blades 31 of the same length are radially provided on the circumference of the rotary shaft 30 while the mounting base is spirally shifted by 90 ° from each other. Please refer to FIG. The stirring blade 31 is composed of a blade main body 32 and a cemented carbide blade 33. The blade main body 32 is formed to have a T-shaped cross section, and a mounting portion 34 having a square tubular shape is provided at a tip end portion thereof. A bolt hole 35 through which two bolts B can be inserted is provided on the side of the mounting portion 34. Further, a square stirring plate 36 is fixed to the opening-side tip of the mounting portion 34. The stirring plate 36 is provided with a notch 37 corresponding to the opening of the mounting portion 34, and a cemented carbide blade 33 is mounted through the notch 37.

The tip of the cemented carbide blade 33 is formed to be sharp, and a bolt hole 38 corresponding to the bolt hole 35 of the mounting portion 34 is provided in the rear portion. The cemented carbide blade 33 is fixed to the mounting portion 34 by inserting the bolt B into the bolt holes 35 and 38 and tightening it with the nut N. According to this structure, when the stirring unit 3 is rotated to be immersed in the ground, the tips of the stirring blades 31 are brought into contact with the ground surface two by two in order so that an average load is applied at short intervals. There is.

FIG. 3 is an explanatory diagram showing a usage state. The usage method and operation of this embodiment will be described with reference to FIGS. 1 to 3. The soft ground agitator A is attached to the tip of the arm 9 of the working machine M. Then, the water of the river is discharged, and the cement powder 71 is sprayed in layers on the surface of the riverbed 70 which is a soft ground including mud. The boom 8 and the arm 9 of the working machine M are extended to the opposite bank, the support frames 2 and 2 are erected vertically, and the drive mechanism unit 4 rotates the stirring unit 3. Then, while rotating the stirring unit 3, the boom 8 and the arm 9 are operated to lower the soft ground stirrer A, and the stirring unit 3 is immersed in the river bed 70 at a required depth.

At this time, the stirring blade 31 sequentially contacts the surface of the riverbed 70, and a large load is not applied at once unlike the conventional stirrer, so that the vibration and noise generated by this are small. Also, when stirring in the soil, even if it comes into contact with hard stones or the ground, the same large load is not applied, and the average load is continuously applied. Therefore, the drive mechanism such as the hydraulic motor 42 is driven. The load on the part 4 and the soft ground agitator A as a whole is also small. Further, the cemented carbide blade 33 at the tip of the stirring blade 31 has little wear even when used for a long period of time or when it comes into contact with a hard stone or the ground, so that repair work can be omitted.

FIG. 4 is a perspective view showing a second embodiment of a soft ground agitator according to the present invention mounted on an arm of a working machine. In the soft ground agitator A1 of this embodiment, unlike the soft ground agitator A, the chain 44a and the chain case 45a of the drive mechanism 4a are arranged in the inner middle portions of the support frames 2 and 2. That is, the relay shaft 49 is accommodated in the shaft case 48 and is supported under the underframe 1. Sprockets 47, 47a are attached to both ends of the relay shaft 49, and a chain 44a is hung between the sprocket 47a on the outer side and the drive shaft sprocket of the hydraulic motor 42a on the underframe 1. The chain 44a is covered with a chain case 45a.

A sprocket 41a is attached to the center of the rotary shaft 30a of the stirring unit 3a. A chain 44 is hung on the sprockets 41a and 47, and the whole is covered with a chain case 45. In the drawings, the same or equivalent parts as those of the soft ground agitator A shown in FIG. 1 are designated by the same reference numerals. The method of use and operation are almost the same as those of the soft ground agitator A, but since the chain case 45 is located inside the support frames 2 and 2, there are few overhangs, so there is less movement resistance in the ground. , Workability is better.

FIG. 5 is a perspective view showing a third embodiment of a soft ground agitator according to the present invention mounted on an arm of a working machine. In the soft ground stirrer A2 of this embodiment, stirrer units 3 and 3b are provided in upper and lower two stages. The rotating shafts 30 and 30b of the stirring units 3 and 3b are pivotally supported by the upper support frames 2a and 2a and the lower support frames 2b and 2b. Joining flanges 20a and 20b are provided on the lower end portions of the upper support frames 2a and 2a and the upper end portions of the lower support frames 2b and 2b, respectively. The upper and lower support frames 2a and 2b are joined by fastening the joining flanges 20a and 20b with a bolt nut 21.

The upper stirring unit 3b is driven via a drive mechanism section 4 having the same structure as the drive mechanism section 4 of the soft ground agitator A. The lower stirring unit 3a is driven via a drive mechanism section 4b provided on the opposite side of the drive mechanism section 4. The drive mechanism section 4b has a sprocket 41b provided at the end of the rotary shaft 30b. A chain 44b is hung between the sprocket 41b and the drive shaft sprocket of the hydraulic motor 42b on the underframe 1, and each sprocket and the chain 44b are covered with a chain case 45b. The chain case 45b has a structure that can be easily attached and detached so that there is no hindrance when the lower support frames 2b, 2b are removed.

The method of use and operation are almost the same as those of the soft ground agitator A, but the soft ground agitator A2 can work more efficiently when the ground to be agitated is deep. When stirring the shallow ground, the lower support frames 2b, 2b can be separated from the upper support frames 2a, 2a, and the chain 44b and the chain case 45b can be removed to use the soft ground agitator A in substantially the same state. In the drawings, the same or equivalent parts as those of the soft ground agitator A shown in FIG. 1 are designated by the same reference numerals. The present invention is not limited to the illustrated embodiment, and various modifications can be made within the scope of the claims for utility model registration.

[0024]

[Effect of device]

 The present invention has the above configuration and has the following effects. (A) The stirring blade is radially provided on the rotating shaft so that the attachment base part draws a spiral. According to this, since the stirring blade contacts the ground surface in order when it is immersed in the ground, a large load is not applied at one time unlike the conventional stirring machine, and the load on the drive mechanism part such as the hydraulic motor and the entire stirring machine is also reduced. It also becomes smaller, and the vibration and noise generated are suppressed. Even when the stirring blade hits a foreign substance such as a stone in the ground, it is easy to escape because it is a single body, and since the blade of the stirring blade is provided with a carbide blade, it is not easily damaged. Therefore, the life of the entire machine is extended.

(B) In the case where the chain case of the drive mechanism section is housed inside the support frame, since the overhanging section is reduced, the resistance when the stirrer is immersed in the ground or moved in the ground is small. Excellent workability. (C) In the case where the stirring units are provided in multiple stages, the stirring can be efficiently performed even when the ground of the construction portion is deep.

(D) In the case where the agitating unit is pivotally supported and the supporting frames provided in multiple stages can be connected and separated, since the number of agitating units can be adjusted, only one unit can adjust the depth of the ground of the construction section. Can be constructed correspondingly. (E) In the stirring blade in which the cemented carbide blade can be inserted, fixed and removed from the mounting portion mainly composed of the blade, the stirring blade having the cemented carbide blade can be easily formed. Further, the carbide blade has little wear even when used for a long period of time or when it comes into contact with a hard stone or the ground, so that repair work can be omitted.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a soft ground agitator according to the present invention attached to an arm of a working machine.

FIG. 2 is an exploded perspective view of essential parts showing the structure of a stirring blade.

FIG. 3 is an explanatory view showing a usage state.

FIG. 4 is a perspective view showing a second embodiment of a soft ground agitator according to the present invention attached to an arm of a working machine.

FIG. 5 is a perspective view showing a third embodiment of the soft ground agitator according to the present invention with the arm of the working machine attached.

FIG. 6 is a perspective view showing the structure of a conventional soft ground agitator.

[Explanation of symbols]

 A, A1, A2 Soft ground stirrer 1 Underframe 2, 2a, 2b Support frame 3, 3a, 3b Stirring unit 30, 30a, 30b Rotating shaft 31 Stirring blade 32 Blade main body 33 Carbide blade 34 Mounting part 4, 4a, 4b Drive mechanism section 42, 42a, 42b Hydraulic motor 44, 44a, 44b Chain 45, 45a, 45b Chain case

Claims (5)

[Scope of utility model registration request] 1. A soft ground agitator used for soil improvement of soft ground, the agitator including an underframe attachable to an arm of a working machine, and a support frame provided on the underframe. A stirring unit attached to the support frame, and a drive mechanism section for driving the stirring unit, wherein the stirring unit is configured to have a rotating shaft and a mounting base portion that is radially arranged so as to draw a spiral on the rotating shaft. A soft ground stirrer provided with a required number of stirrer blades provided with a super hard blade at the blade tip. 2. The soft ground agitator according to claim 1, wherein the chain case of the drive mechanism section is housed inside the support frame. 3. The soft ground stirrer according to claim 1, wherein the stirrer units are provided in multiple stages. 4. Each agitating unit is axially supported by a supporting frame provided in multiple stages, and the supporting frame is connectable and separable.
The soft ground agitator according to claim 3. 5. The stirring blade comprises a blade main body and a cemented carbide blade, and a cylindrical mounting portion is provided at the tip of the blade main body, and the cemented carbide blade can be inserted, fixed and removed from the mounting portion. A stir blade for a soft ground stirrer.