JP3214400U - Drilling tools for planting - Google Patents

Abstract

An object of the present invention is to reduce the weight of an excavator for planting while supporting the outer periphery of a spiral body. A planting excavator includes a rotating shaft, a spiral blade, and a support plate. The rotating shaft 14 includes a base portion 14A attached to a motor driven driver drill 12 and a sharp distal end portion 14B. The spiral blade 16 is provided in the vicinity of the distal end portion 14B and wound around the rotating shaft 14 over a plurality of turns. A plurality of support plates 18 are provided on the outer periphery of the spiral blade 16 at intervals in the circumferential direction, and support the spiral blade 16 over a plurality of turns. [Selection] Figure 1

Description

  The present invention relates to a planting excavator.

  When planting seedlings grown in pots, etc., dig a hole in the soil. For example, in Patent Literature 1, a drilling unit is attached to a motor-driven driver, and a hole for planting a cocoon seedling is excavated in the cocoon by rotating the drilling unit.

  Specifically, the drilling unit includes a rotating shaft body provided with a sharp portion on the tip side, a spiral body wound several pitches on the outer periphery of the rotating shaft body, and prevention of scattering of cylindrical excavated soil attached to the outer periphery of the spiral body A cover is provided.

JP 2009-195153 A

  By the way, when a cylindrical scattering prevention cover is provided on the outer periphery of the spiral body, the weight of the scattering prevention cover increases, and the required torque of the driver that outputs the rotational driving force increases. On the other hand, when the scattering prevention cover is removed, there is no support for supporting the outer periphery of the spiral body, so there is room for improvement from the viewpoint of durability. Then, this invention aims at providing the drilling tool for planting reduced in weight rather than before, supporting the outer periphery of a helical body.

  The present invention relates to a planting excavator. The excavator includes a rotating shaft, a helical blade, and a support plate. The rotating shaft includes a base attached to a motor driven driver and a sharpened distal end. The helical blade is provided proximate to the distal end and wound around the rotating shaft over multiple turns. A plurality of support plates are provided on the outer periphery of the spiral blade at intervals in the circumferential direction, and support the spiral blade over a plurality of turns.

  Moreover, in the said device, the longitudinal direction length of a rotating shaft may be 50 cm or more and 100 cm or less.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the excavation tool for planting reduced in weight compared with the past, supporting the outer periphery of a helical body.

It is a figure which shows an example when the excavation tool for planting concerning this embodiment is attached to the driver drill. It is a figure which illustrates the whole image of the excavation tool for planting concerning this embodiment. It is an enlarged view which shows the structure of the distal end part periphery of the excavation tool for planting which concerns on this embodiment. It is a figure explaining excavation work (1/3) using the excavation tool for planting concerning this embodiment. It is a figure explaining excavation work (2/3) using the excavation tool for planting concerning this embodiment. It is a figure explaining excavation work (3/3) using the excavation tool for planting concerning this embodiment.

  FIG. 1 shows an example when the planting excavator 10 according to the present embodiment is attached to a driver drill 12. The planting excavator 10 can be attached as long as it is a motor-driven driver, and can be attached to, for example, an impact driver.

  The whole image of the excavation tool 10 for planting is illustrated by FIG. The planting excavator 10 includes a rotating shaft 14, a spiral blade 16, and a support plate 18. The planting excavator 10 is made of a rigid metal material such as iron or aluminum.

  The rotating shaft 14 is a shaft body attached to the driver drill 12, and has a base portion 14A attached to the driver drill 12 at one end in the longitudinal direction and a sharp distal end portion 14B at the other end. A spline groove to be attached to the drill chuck 12A of the driver drill 12 is formed in the base portion 14A.

  The total length L1 in the longitudinal direction of the rotating shaft 14 may be not less than 50 cm and not more than 100 cm. By setting it as such length, excavation work can be performed in a standing position, and the location movement when excavating a plurality of planting holes is facilitated.

  FIG. 3 illustrates an enlarged view around the distal end portion 14 </ b> B of the rotating shaft 14. The distal end portion 14B has a sharp shape and is easy to drill into the soil.

  A spiral blade 16 is provided in proximity to the distal end 14B, specifically, slightly on the base 14A side from the distal end 14B. The spiral blade 16 is wound around the outer periphery of the rotating shaft 14 over a plurality of turns. For example, the number of wrinkles of the spiral blade 16 is 2.0 (2 turns). Further, the pitch p between the blades is determined in a range of 3 cm to 7 cm, for example, in order to prevent biting of pebbles. Further, the pitch angle of the spiral blade 16 is determined in the range of 30 ° to 60 °.

  In addition, the spiral blade 16 may be formed such that its blade diameter decreases as it advances toward the distal end portion 14B. By setting it as such a shape, the perforation to soil can be performed easily.

  Moreover, the full width L2 and diameter R1 of the spiral blade 16 along the longitudinal direction of the rotating shaft 14 are determined according to the size of the seedling to be planted. For example, the diameter R1 of the spiral blade 16 is determined so that a planting hole for a No. 3 pot generally used as a tree raising pot can be excavated.

  For example, since the No. 3 pot has a diameter of 9 cm, the diameter R1 of the spiral blade 16 is determined to be 9 cm or more and 11 cm or less. Further, the total width L2 of the spiral blade 16 is determined so as to exceed the depth of the No. 3 pot in order to deposit the soil that has been cut and loosened during the excavation process on the bottom of the planting hole 22, as will be described later. . Specifically, since the No. 3 pot has a depth of 7.6 cm, the entire width L2 of the spiral blade 16 is determined to be 8 cm or more and 15 cm or less.

  A support plate 18 is attached to the outer periphery of the spiral blade 16. The support plate 18 extends in the longitudinal direction of the rotary shaft 14 and supports the outer periphery of the spiral blade 16 over a plurality of turns. A plurality of support plates 18 are provided on the outer periphery of the spiral blade 16 at intervals in the circumferential direction. For example, two support plates 18 are provided at intervals of 180 degrees.

  Further, the center angle θ of the support plate 18 is set to, for example, 10 ° or more and 20 ° or less. For example, when two support plates 18 are provided, the maximum coverage of the outer periphery of the spiral blade 16 is 1/9 (40 ° / 360 °), and the weight can be reduced as compared with the case where the entire periphery is covered.

  The excavation work process using the excavation tool for planting which concerns on this embodiment is illustrated by FIGS. As shown in FIGS. 4 and 5, the distal end portion 14 </ b> B of the planting excavator 10 is inserted into the soil surface 20, and the trigger 12 </ b> B of the driver drill 12 is pulled to rotationally drive the planting excavator 10.

  Excavation proceeds as shown in FIG. 5 by pushing the excavating tool 10 for planting into the ground while being rotated. The excavated soil is conveyed to the soil surface 20 according to the rotation of the spiral blade 16. The transported soil accumulates around the planting hole 22.

  Further, in the process of rotation of the spiral blade 16, a part of the soil falls out from the gap between the support plates 18 and 18. Further, in the process of rotation of the spiral blade 16, the support plate 18 scrapes the side surface of the planting hole 22. These fallen or scraped soils are in a state of being crushed and loosened by the planting excavator 10, and such soil accumulates at the bottom of the planting hole 22 so that the roots of the tree seedlings can be easily stretched. .

  When the end of the spiral blade 16 closest to the base 14A reaches the ground surface, excavation is completed. FIG. 6 illustrates a planting hole 22 excavated by the planting excavator 10. As described above, the total width L2 and diameter R1 of the spiral blade 16 are determined according to the size of the tree seedling to be planted (more precisely, the size of the seedling pot in which the tree seedling is accommodated). A planting hole 22 in which there is no excess or deficiency in the tree seedling is drilled. Further, as described above, the soil 24 that has been crushed and loosened in the excavation process is accumulated at the bottom of the planting hole 22, and the roots of the tree seedlings are easily stretched.

DESCRIPTION OF SYMBOLS 10 Drilling tool for planting, 12 Driver drill, 12A Drill chuck, 12B Trigger, 14 Rotating shaft, 14A Base, 14B Distal end, 16 Spiral blade, 18 Support plate, 20 Soil surface, 22 Planting hole.

Claims (2)

A base attached to a motor driven driver; and a rotating shaft with a pointed distal end;
A helical blade provided proximate to the distal end and wound around the rotating shaft over multiple turns;
A plurality of circumferentially spaced outer circumferences of the spiral blades, and a support plate for supporting the spiral blades over the plurality of turns;
A drilling tool for planting. The planting excavator according to claim 1,
The excavation tool for planting whose longitudinal direction length of the said rotating shaft is 50 cm or more and 100 cm or less.