JP2612228B2 - Earth auger unloader - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for automatically excavating mud adhering to blades of a screw auger of an earth auger machine used for excavating a ground in foundation pile work for laying a ready-made concrete pile or the like in the ground. The present invention relates to an earth removal device for removing soil.

[0002]

2. Description of the Related Art As shown in FIG.
The screw auger 4 has a structure in which a blade 6 is helically attached to the outer periphery of a drive shaft 5 in parallel with a leader 3 standing upright at the tip of a crawler 2. In addition, the ground is excavated by rotating and descending by a motor 7 installed at the upper end of the screw auger 4.

When the screw auger 4 is pulled up, it is usually raised while rotating it.
At this time, the surface of the blade 6 of the screw auger 4 and the blade 6
And the blade 6 rises with mud adhered.
Therefore, it is necessary to scrape off the mud before pre-boring again. Conventionally, however, a person scrapes the mud using a scoop or the like.

However, as described above, in the method of scraping mud by human power, the mud between the blades 6 is firmly attached,
In addition, since the screw auger 4 is rising while rotating, it is very difficult to remove the mud cleanly, and the worker gets caught in the rotating screw auger 4 or falls. There were various problems such as hitting mud and being dangerous.

[0005] In order to automate the work of scraping the mud, the applicant has previously filed a Japanese Patent Application No. 5-208193 for a soil discharging device as shown in FIG. That is, in the drawing, reference numeral 8 denotes an earth-discharger, which is composed of a disk-shaped base 9 and one or more disk-shaped earth-discharge blades 10 fixed on the circumference of the base 9. The center of the base 9 is rotatably attached to an arm of an unloading device (not shown). And
The base end of the arm is supported so as to rotate in a horizontal direction with respect to a mounting base fixed to the reader 3 of the earth auger machine 1. It is parallel to the direction of the center and intersects the surface of the blade 6 of the screw auger 4 almost at right angles.

Therefore, during the excavation work, the earthmoving wheel 8 is located at a position separated from the blades 6 of the screw auger 4, and the screw auger 4 rotates and descends for excavation. At the end of the excavation work, the earthmoving wheel 8 moves to the drive shaft 5 side of the screw auger 4 and is located between the blades 6 and 6, and the screw auger 4 rises while rotating. While rotating according to the pitch of the auger 4, mud soil between the blades 6 and 6 and mud adhering to the blades 6 are continuously scraped off by the discharging blades 10 sequentially positioned between the blades 6 and 6.

[0007]

However, the screw auger 4 has a coupling 5a having a larger diameter than the drive shaft 5 formed at the lower end of the upper screw auger 4A and formed at the upper end of the lower screw auger 4B. Since it is configured so as to be fitted on a square tube portion (not shown) and drive two pins P to connect them to a predetermined length, the earth removal truck 8 is used at the time of earth removal work.
There is a possibility that the earth discharging blade 10 may be damaged by contacting the coupling 5a, the pin P and the like.

Further, as described above, the screw auger 4
Are connected by the coupling 5a, so that if the connecting portion 6a of the upper and lower spiral blades 6 is displaced, the rotation of the dumper 8 does not match the pitch of the blades 6 of the screw auger 4 and is caught. Therefore, there is a possibility that the discharging blade 10 and the supporting portion of the discharging vehicle 8 may be broken.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is an improvement of the above-mentioned invention which was filed by the present applicant. When the earth blade hits a bulging deformed part of the screw auger connection part, it is elastically deformed and absorbs the impact force, so that the earth discharging work can be normally continued. The gist of this is to dispose an earth-moving vehicle that is mounted so that it rotates in conjunction with the rotation and vertical movement of the screw auger blades, close to the disk-shaped base and its outer periphery. When it is composed of a plurality of discharging blades installed,
The base and the discharging blade are connected via coil springs, one ends of which are fixed by fixing members, respectively. The fixing of the coil springs by the fixing members is performed by placing a cylindrical support having a diameter slightly smaller than the inner diameter in the coil springs. When the mounting member is inserted and mounted, the outer periphery of the coil spring at the portion where the interposition member is inserted is fastened and fixed, so that the dumper can be inserted between the blades of the screw auger. An earth discharging device for an earth auger machine, which is installed on the earth auger machine.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to an embodiment shown in FIGS.
Reference numeral denotes an earth-moving vehicle for removing mud adhering to the blades 6 of the screw auger 4. The earth-moving vehicle comprises a disk-shaped base 19 and four earth-discharge blades 20 radially arranged on the outer periphery of the base 19. ing. The base 19 and the discharging blade 20 are separated from each other, and are connected to each other via an elastic body 22 fixed by a fixing member 21 as described later.

That is, the fixing member 21 connects the pressure receiving member 23 and the pressure member 24 and the interposition member 25 disposed on the base 19 and the discharging blade 20 respectively, and connects the pressure receiving member 23 and the pressure member 24 to each other. It is composed of fixing bolts 26. The pressure receiving member 23 and the pressure member 24 have the same prismatic shape. At the center of the opposing surfaces of the pressure reception member 23 and the pressure member 24, arcuate concave portions 27 that become a perfect circle when they are joined are formed. I have. Here, the diameter of the arc recess 27 is set to be the same as the outer diameter of the coil spring 22 selected as the elastic material.

On both sides of the arcuate concave portion 27 of the pressure receiving member 23, a female screw 28 with which a bolt 26 is screwed is provided. The pressure member 24 is opposed to the female screw 28 of the pressure receiving member 23. Hole 29 into which the head of bolt 26 is immersed
Are formed. Further, the interposition member 25 has a cylindrical body 25a having the same outer diameter as the inner diameter of the coil spring 22.
Is provided with a flange 25b at one end thereof,
The outer diameter of the flange 25b is set smaller than the inner diameter of a perfect circle formed when the pressure receiving member 23 and the pressure member 24 are joined.

Therefore, in order to fix the coil spring 22 which is an elastic body to the base 19 and the discharging blade 20, first, an interposition member 25 is inserted into an end of the coil spring 22. Next, the discharging blade 20 is disposed at a predetermined position on the outer periphery of the base 19 at a very small distance from the outer periphery of the base 19, and the pressure receiving member 2 is disposed on the surface side of the base 19 and the discharging blade 20, respectively.
3 are fixed parallel to each other.

After placing the ends of the coil springs 22 in the arcuate recesses 27 of the pressure receiving portions 23 of the base 19 and the discharging blade 20, the pressing members 24 are placed on the respective pressure receiving members 23, and the pressure Bolt 26 inserted into insertion hole 29 of member 24
Is screwed into the female screw 28 of the pressure receiving member 23 and tightened. As a result, the end of the coil spring 22 is
The coil spring 22 is firmly fixed without being crushed by the 3, the pressing member 24, and the interposition member 25, and the base 19 and the discharging blade 20 are connected via the coil spring 22.

Next, the earth auger machine 1 of the earthmoving vehicle 18
Referring to FIG. 2, the mounting state of the mounting base 30 is fixed to a pair of hook-shaped bearings 30A provided on the right and left sides of the back surface of the reader 3 in parallel with the screw auger 4 of the earth auger machine 1. Have been. Further, an arm 32 is attached to the support shaft 31 which is supported by the mounting base 30.
Is rotatably fixed, and the center of the base 19 of the earthmoving vehicle 18 is rotatably mounted on a bearing at the distal end thereof. Then, the discharging blade 2 of the discharging vehicle 18
The plane portion 0 is set to be parallel to the axial direction of the reader 3 and to intersect the surface of the blade 6 of the screw auger 4 almost at right angles.

Further, the mounting base 30 and the central portion of the arm 32 are connected by a telescopic member 33 such as a turnbuckle, a hydraulic cylinder or an air cylinder. The engagement between the blade 20 and the blade 6 of the screw auger 4 is adjusted.
Further, a guide cylinder (not shown), into which the screw auger 4 is rotatably and vertically movable, is connected to the lower side (or upper side) of the mounting base 30.

Therefore, at the time of excavation work, as shown by the chain line in FIG. 2, the earth-moving vehicle 18 is installed at a position away from the blade 6 of the screw auger 4, and at the end of the excavation work, as shown by the solid line. Then, the arm 32 is rotated clockwise about the support shaft 31, and is installed and fixed between the blades 6.
At the end of the excavation work, when the screw auger 4 rises while rotating in the reverse direction, the dumper 18 moves the screw auger 4
The blades 6 of the screw auger 4 rotate in accordance with the pitch of the blades 6, and each of the discharging blades 20 sequentially enters between the blades 6 of the screw auger 4.
Mud adhering to the space and to the blades 6 is continuously scraped off.

At the time of the earth discharging operation, the earth discharging blades 20 of the earth discharging vehicle 18 are bulged and deformed such as displacement of the enlarged portions 5a, pins P, and the blades 6 which are connection portions of the screw auger 4, and At this time, the ejecting blade 20 escapes in the impact direction due to the elastic deformation of the coil spring 22, and the impact force is applied to the coil spring 22.
To absorb.

After the discharging blades 20 have passed through the swelling deformed portion and the solidly adhered mud, the coil spring 2
With the restoring force of 2, the discharge blade 20 is restored to the solid line state in FIG. 2, and the discharge operation is continued. At this time, the impact force does not affect the discharge blade 20, the base 19, the arm 32 supporting the discharge vehicle 18, and the like, and the base 19, the discharge blade 20 and the coil spring 22 are not affected. There is no loosening or damage to the fixed part.

Depending on the soil quality of the mud adhering to the blades 6 of the screw auger 4, the discharging blades 20 of the discharging truck 18 may be used.
However, since the force required to scrape off the mud is different, this case can be dealt with by replacing the coil spring 22 with a strength suitable for the soil quality.

[0021]

According to the present invention, the earth discharging device for an earth auger machine comprises a disk-shaped earth-moving machine having a shaft mounted so as to rotate in conjunction with the rotation of the blade of the screw auger and the vertical movement. And a plurality of discharge blades arranged close to the outer periphery of the base, and the base and the discharge blades are connected to each other through coil springs having one ends fixed by fixing members. The fixing of the coil spring by the fixing member is performed by inserting a cylindrical interposed member having a diameter slightly smaller than the inner diameter of the coil spring into the coil spring, and mounting the coil spring at a portion where the interposed member is inserted. Since the configuration is such that the outer periphery is fastened and fixed, and the earth-moving machine is installed on the earth auger machine so that the soil excavator can enter between the blades of the screw auger, the coil spring may be crushed. And can be firmly fixed to the base and the discharge blade, respectively, and even if the discharge blade hits a bulging deformation part during the discharge operation, escape by the elastic deformation of the coil spring As a result, the impact force can be absorbed, the occurrence of breakage of the earth removal device can be prevented as much as possible, and various effects such as improved durability can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of an earth discharging device of an earth auger machine according to the present invention.

FIG. 2 is a plan view of the earth discharging device.

FIG. 3 is a partially cutaway front view of a connecting portion of the earth removal device.

FIG. 4 is an exploded perspective view of a connecting member in the connecting portion.

FIG. 5 is a side view of a general-purpose screw-type earth auger machine.

FIG. 6 is an explanatory view of the principle of an earth removal device before improvement.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Earth auger machine 3 Leader 4 Screw auger 6 Blade 18 Discharger 19 Base 20 Discharge blade 21 Fixing member 22 Coil spring 23 Pressure receiving member 24 Pressing member 25 Intermediate member 25a Cylindrical body 25b Flange 26 Bolt 27 Arc recess 30 Base 31 Support shaft 32 Arm

Claims (1)

(57) [Claims] 1. A disk-shaped base and a plurality of discharge blades arranged close to the outer periphery of a disk-mounted base which is mounted so as to rotate in conjunction with the rotation and vertical movement of the blades of a screw auger. In addition, the base and the discharging blade are connected via a coil spring having one end fixed by a fixing member, and the coil spring is fixed by the fixing member inside the coil spring. When a cylindrical insertion member having a smaller diameter is inserted and mounted, the outer periphery of the coil spring at the portion where the insertion member is inserted is tightened and fixed. The earth auger machine has an earth auger machine that is installed on the earth auger machine so that it can enter between the blades.