JPH0439919Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to an earth auger that excavates a hole in the ground by an auger that is guided by a leader and descends, and particularly relates to an auger resting device.

B. Prior Art A conventional earth auger is similar to the one shown in FIG. 1 with the intermediate resting device D removed. With such multiple augers, the auger drive motor A is still in a high position at the beginning of hole drilling, and the column body of the auger B is exposed for a long time above the ground protection device C, which is always positioned near the ground surface. However, since the ground is generally hard at the surface and there are some remaining buried objects, an impact occurs at the bottom end of the auger when the hole is initially excavated, which causes the auger B under the drive motor to shake, causing the auger to change the drilling position and direction. There was a drawback that caused a discrepancy. Further, the vibration of the auger may damage the reduction gear of the drive motor A and the like.

C. Problems to be solved by the invention The present invention was provided in order to solve the above-mentioned problems, and includes an intermediate resting device between the drive motor and the ground resting device, and the initial stage of drilling a hole. An object of the present invention is to obtain an earth auger in which no runout occurs in the upper part of the auger, and therefore drilling of a hole can be carried out smoothly from beginning to end.

D. Means for Solving Problems The present invention, as illustrated in FIG. When installing a ground resting device D that can be raised and lowered by moving up and down, a wire winding drum 15 powered by a spring-shaped coil spring 18 is provided on either the intermediate resting device D or the drive motor A. The end of the wire 10 pulled out from the drum 15 is connected to the intermediate stop device D or drive motor A on the side where the wire winding drum 15 is not installed, and the coil spring 18 of the wire winding drum 15 is unwound. , the intermediate steady device D is connected to the drive motor A.
An earth auger is configured to be suspended between the ground auger and the ground sway prevention device C.

E. Function At the initial stage of drilling a hole with the earth auger, as shown in FIG. 1, the auger drive motor A is at the highest position and the ground treading device C is near the ground surface. The intermediate sway prevention device D is suspended by a hanging wire 10 that extends from the winding drum 15 of the lifting device and has its upper end fixed to the main body 9 of the auger drive motor A, so that the intermediate sway prevention device D is suspended from the ground level with the auger drive motor A. It is fixed on the column body of the auger B, which is located between the stop device C and the auger B. Then, as the excavation progresses and the lower end of the auger penetrates into the ground as shown in FIG. 6a, the intermediate resting device D suspended from the wire 10 also lowers as the lower end of the auger drive motor A goes down. In these cases, the excavation claw 5 of the auger B is excavating the hard ground surface, and the column part of the auger B above the ground sway prevention device C is still long and protrudes above the ground, making it unstable and causing vibration. However, the intermediate resting device D prevents the swinging out, so that the position of the excavated hole does not shift or the direction of the hole deviates. In this way, while the swinging of the column body of the auger is prevented, the drilling of the hole progresses and the auger B penetrates into the ground, and when the intermediate treading device D reaches the top of the ground treading device C, the winding drum Wire 1 by 15
Winding of 0 begins, as shown in Figure 6b.
When auger drive motor A reaches the lowest position, wire 1
0 is completely wound up by the winding drum 15. Therefore, the wire 10 is not unnecessarily loosened.
When the auger B rises, the wire 10 is unwound from the winding drum 15, and after the unwinding is finished, the intermediate resting device C is raised again in a suspended state to prevent the column body of the auger B from swinging. .

F. Embodiment What is shown in FIGS. 1 and 2 is an earth auger. In the figure, A is an auger drive motor that is slidably attached to two guide rods 2 installed parallel to the leader mast 1 and suspended by a main wire 3, and B is an auger drive motor whose upper end is connected to the auger drive motor A. It is a triple auger. C is the ground sway prevention device, and sub wire 4
It is suspended by a hole, but it is located near the ground during drilling. 5 is a digging claw, 5a is a stirring protrusion, and 6 is a position of the digging claws 5 so that the circular holes excavated by the three augers B intersect with each other, that is, interfere with each other to form a continuous hole. It is an interference device. The leader mast 1 is erected by a boom 8 extending from a vehicle body 7. D is an intermediate resting device, which is suspended by a wire 10 whose upper end is fixed to the main body 9 of the auger drive motor A, and when the auger B is raised, it is suspended between the drive motor A and the ground resting device C. stuck in position. This intermediate resting device is constructed as shown in FIGS. 3 to 5. In the figure, reference numeral 11 denotes a series of three stopper cylinders that are inserted into the columnar part of the auger B so as to be rotatable and slidable up and down. A parallel frame 12 protrudes. Numeral 19 denotes grooved rollers that are pivotally supported at the rear end of the parallel frame 12, two at the top and two at the bottom, and roll around the guide rod 2. Two support plates 13 are fixed between the parallel frames 12 with their plane directions perpendicular to each other, and the support plates 1
A fixed shaft 14 is mounted horizontally between 3 and 13. Reference numeral 15 denotes a wire winding drum which is pivotally connected to the fixed shaft 14, and has a built-in spring-shaped coil spring 18 whose one end is fixed to the fixed shaft 14 and the other end is fixed to the inner surface of the drum. Reference numeral 10 denotes a wire, the upper end of which is fixed to the main body 9 of the auger drive motor A as described above, and the lower end of the winding wire is fixed to the drum 15. Reference numeral 17 denotes a grooved roller which is mounted on a supporting arm 16 extending from the parallel frame 12, and guides the wire 10 by drawing it out on the drum 15. When the intermediate rest stop device D is suspended by the wire 10, the wire 10 is unwound from the drum 15 against the winding force of the coil spring 18, and the rest stop cylinder 11 is attached to the upper surface of the ground rest stop device C. When the wire 10 is reached, the drum 15 is rotated by the winding force of the coil spring 18, and the wire 10 is wound so as not to become slack.

In another embodiment, the winding drum 15 may be provided on the side of the auger drive motor A.

In addition, two winding drums are mounted on the intermediate anti-skid device D, and the wire end of one winding drum is extended upward and fixed to the main body 9 of the auger drive motor A, and the wire end of the other winding drum is fixed to the main body 9 of the auger drive motor A. The end is extended downward and fixed to the main body of the ground resting device C, and tension is applied to the wire by the winding force of both winding drums, and the intermediate resting device D is connected to the auger drive motor A.
It may be arranged to be stopped between the and the ground level prevention device C. In this case, the wire is wound up and unwound to the intermediate resting device D in accordance with the approach and separation of the device C and the motor A, so that the intermediate resting device D is always located in the middle. Furthermore,
The same thing can be obtained by dividing the two winding drums into two parts, one on the auger drive motor A side and the other on the ground resting device C side, and connecting the intermediate resting device D to each wire end. It will be done.

Effects of the invention The present invention has the above-mentioned features. An intermediate sagging device is provided in the auger column body between the auger drive motor and the ground sway preventing device, and the intermediate sagging is adjusted in response to the rise and fall of the auger drive motor. Since a lifting device is provided to move the stopper, the auger column, which extends far above the ground, does not shake during the early stage of hole drilling, making it possible to drill holes smoothly and accurately. Damage to the auger drive unit that would otherwise occur can be eliminated. As the excavation progresses and the intermediate rest stop device D, which descends together with the auger drive motor A, reaches the ground rest stop device C, the winding drum 15 rotated by the restoring force of the coil spring 18 winds up the wire 10. This feature prevents the wire from becoming unnecessarily loose.

[Brief explanation of the drawing]

Fig. 1 is a side view of an embodiment of the present invention, Fig. 2 is a front view of the same, Fig. 3 is an enlarged side view of the main parts of the above, Fig. 4 is a plan view of a part of the main parts, FIG. 5 is a cutaway side view of a part of the main part, and FIGS. 6a and 6b are side views showing the function of the main part, respectively.

Claims (1)

[Scope of utility model registration request] When installing an intermediate resting device D that can be raised and lowered along the leader mast 1 on the column body of the auger between the auger drive motor A and the ground resting device C of the auger B, the intermediate resting device D and the above-mentioned A spring-shaped coil spring 18 is attached to either drive motor A.
A wire winding drum 15 is provided as a motive force, and the end of the wire 10 pulled out from the winding drum 15 is connected to an intermediate stop device D or a drive motor A on the side where the wire winding drum 15 is not installed. Coil spring 18 of winding drum 15
An earth auger in which an intermediate steadying device D is suspended between the drive motor A and the ground steading device C in an unwound state.