Drilling apparatus

Abstract

To provide a drilling apparatus with a simple configuration capable of efficiently making holes for planting strawberry seedlings and the like.SOLUTION: A drilling apparatus 1 comprises: moving means (travel wheels 3); a plurality of drills 4 that moves together with the moving means and is vertically movable; drilling tools 5 fixed to respective lower ends of the plurality of drills 4; a handle 7 for lowering the plurality of drills 4 from a predetermined position; return means (tension spring (coil spring) 8) for returning the handle 7 from a lowered position to the predetermined position; and rotating means for rotating each of the plurality of drills 4. Each drilling tool 5 includes a pair of opposed rod-like members 5a, 5b. The rod-like members 5a, 5b may be formed so that the interval between them gradually decreases downward. The cross-sections of the pair of rod-like members 5a, 5b may be L-shaped, and formed so that the two cross-sections are point-symmetrical in a bottom view.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a hole-making device used to make holes for planting strawberry seedlings when cultivating strawberries in elevated planters. [Background technology]

[0002] When planting strawberry seedlings, etc., it is necessary to drill many holes, and since the working position is high, especially in elevated cultivation, drilling holes manually requires considerable labor. On the other hand, while it is possible to automate the hole drilling work using machines, the cost required for automation is high and there is a risk that it will not be profitable. Summary of the Invention [Problem to be solved by the invention]

[0003] The present invention has been made to solve the above-mentioned conventional problems, and aims to provide a hole-making device that has a simple configuration and can efficiently make holes for planting strawberry seedlings, etc., particularly when cultivating using elevated planters. [Means for solving the problem]

[0004] In order to achieve the above object, the present invention provides a drilling device comprising a moving means, a plurality of drills that move together with the moving means and are movable in the vertical direction, a drilling tool fixed to the lower end of each of the plurality of drills, a handle that lowers the plurality of drills from a predetermined position, a return means that returns the handle from the lowered position to the predetermined position, and a rotation means that rotates each of the plurality of drills.

[0005] According to the present invention, multiple holes can be drilled with the drilling tool by moving multiple drills with the moving means and lowering the multiple drills with the handle, so that holes for planting strawberry seedlings, etc. can be efficiently drilled with a simple configuration.

[0006] In the hole drilling device, the moving means can be a plurality of running wheels, and by running the running wheels along the outer frame of an elevated bench, the device can be suitably used for elevated planters.

[0007] The drilling tool also includes a pair of opposing rod-shaped members, the distance between which gradually decreases as the rod-shaped members extend downward, allowing for efficient drilling.

[0008] Furthermore, by making the cross sections of the pair of opposing rod-shaped members of the hole-drilling tool L-shaped and forming the two cross sections so that they are point-symmetrical to each other when viewed from below, the rod-shaped members are prevented from bending in a direction toward each other and the soil stirred by the rod-shaped members is not prevented from escaping between the rod-shaped members, so that holes suitable for planting can be drilled stably for a long period of time.

[0009] In addition, by holding the drilling tools fixed to the lower ends of each of the multiple drills at the same height and lowering the multiple drills together using the handle, holes of the same depth can be quickly drilled.

[0010] Furthermore, by making the return means a coil spring that is interposed between the handle and the drill fixing member that fixes the multiple drills and that expands as the handle descends, the handle can be easily returned to its original position. [Effects of the Invention]

[0011] As described above, according to the present invention, it is possible to provide a hole drilling device with a simple configuration that can efficiently drill holes for planting strawberry seedlings or the like. [Brief explanation of the drawings]

[0012] [Figure 1] 1A, 1B, and 1C are diagrams showing an embodiment of a hole punching device according to the present invention, in which (a) is a front view, (b) is a plan view, and (c) is a right side view. [Figure 2]2A to 2C are diagrams showing an example of a drilling tool for the drilling device shown in FIG. 1, in which (a) is a front view, (b) is a top view, and (c) is a left side view. [Figure 3] 1. It is a figure which shows another example of the drilling tool of the drilling device shown in FIG. 1, (a) is a front view, (b) is a top view, and (c) is a left side view. [Figure 4] FIG. 2 is a schematic perspective view showing a state in which holes are being drilled in an elevated planter using the hole drilling device shown in FIG. 1. [Figure 5] 2A and 2B are diagrams for explaining the operation of the hole punching device shown in FIG. 1, where (a) is a front view and (b) is a right side view. [Figure 6] 10A to 10D are diagrams showing a modified example of a drilling tool, in which (a) is a front view, (b) is a top view, (c) is a left side view, and (d) is a bottom view. DETAILED DESCRIPTION OF THE INVENTION

[0013] Next, an embodiment of the present invention will be described in detail with reference to the drawings.

[0014] Figure 1 shows one embodiment of the drilling device according to the present invention, and this drilling device 1 is composed of a main body 2, a plurality of running wheels 3 for moving the main body 2, a drill fixing member 9 attached to the lower end of a holding member 10 that is movable in the vertical direction and that fixes a plurality of drills 4, drilling tools 5 connected to the lower end of each drill 4, a handle 7 that lowers the drills 4 via the holding member 10, and a plurality of tension springs (return means) 8 that return the handle 7 from the lowered position to a predetermined position.

[0015] The main body 2 is constructed by combining plate-like or pipe-like members, and has a plurality of (four in this embodiment) running wheels 3 at the bottom and two anti-scattering plates 11 for preventing the stirred soil from scattering around. In Fig. 1(a), a plate-like member 2a is provided on the left side of the main body 2 for placing and fixing a cable for supplying power to the drill 4, a switch (not shown), etc.

[0016] The running wheels 3 are provided to move the main body 2 along an elevated bench or the like, and each running wheel 3 moves horizontally and linearly along the outer frame of the elevated bench or the like.

[0017] The drill 4 is an electric drill, and is fixed vertically to a drill fixing member 9 with the rotating drill side facing downward. The drill fixing member 9 is formed in a frame shape, and is fixed to the lower end of a holding member 10.

[0018] The drilling tool 5 is made of stainless steel or the like, and as shown in Figure 2, it has a pair of opposing rod-shaped members 5a, 5b, which are arranged in a substantially vertical direction, with the distance between them gradually decreasing downward. The rod-shaped members 5a, 5b are fixed to a hexagonal column-shaped support member 5c via plate-shaped members 5d, 5e by bolts, welding, or the like, and the upper part of the support member 5c is connected to the lower end of the drill 4, so that the entire drilling tool 5 rotates together with the drill 4. The multiple (four in this embodiment) drilling tools 5 are held at the same height.

[0019] The drilling tool 5 is for deep drilling, and the drilling tool 19 shown in Fig. 3 is a standard drilling tool. The members (19a to 19e) constituting the drilling tool 19 correspond to the members (5a to 5e) constituting the drilling tool 5. Compared to the standard drilling tool 19, the rod-shaped members 5a and 5b of the deep drilling drilling tool 5 are larger in size and have a shape suitable for drilling deep holes.

[0020] The spring holding member 12 shown in FIG. 1 is erected on the upper surface of the main body 2, and a plurality of (two in this embodiment) tension springs (coil springs) 8 are installed between the spring holding member 12 and the upper part of the drill fixing member 9.

[0021] The holding member 10 passes through the spring holding member 12 and is movable vertically relative to the spring holding member 12, and as the holding member 10 moves vertically, the drill fixing member 9, drill 4, and drilling tool 5 also move vertically. A stopper 13 is fixed to the holding member 10, and the upper end of the holding member 10 is rotatably connected to the handle 7 via a hinge 18.

[0022] The handle 7 is provided for lowering the drilling tool 5 via the holding member 10 etc. The handle 7 is connected to a link 16 via a hinge 17 so as to be rotatable relative to the holding member 5. The link 16 is connected to a link 14 fixed to an upper frame 6 provided on the top surface of the main body 2 via a hinge 15 so as to be rotatable relative to the holding member 5, forming a link mechanism. The center of the handle 7 is connected to the holding member 10 via a hinge 18 so as to be rotatable relative to the holding member 5.

[0023] Next, an example of the operation of the hole punching device 1 having the above configuration will be described with reference to FIGS.

[0024] As shown in FIG. 4, the traveling wheels 3 of the hole drilling device 1 are placed on the outer frame 21 of the elevated planter, and power is supplied to the drill 4 (see FIG. 1) to rotate it. When the handle 7 is manually pressed down in this state, the holding member 10 connected to the handle 7 descends as shown in FIG. 5, and the drill fixing member 9, drill 4, and hole drilling tool 5 also descend, resulting in a hole 23 being drilled in the soil 22 of the elevated planter as shown in FIG. 4. Four holes can be drilled by simply pressing down the handle 7 once. At this time, when the lower surface of the stopper 13 fixed to the holding member 10 abuts against the upper surface of the spring holding member 12, the handle 7 cannot be pressed down further and the descent of the hole drilling tool 5 is restricted, allowing the depth of the hole 23 to be adjusted.

[0025] After drilling the holes 23, when the handle 7 is released, the tension spring 8 contracts and the handle 7 returns to its original position. Next, by manually moving the entire hole drilling device 1 in the longitudinal direction of the elevated planter and repeating the above operation, holes 23 can be drilled continuously in the soil 22.

[0026] Next, a modified example of the hole drilling tools 5 and 19 will be described. FIGS. 2 and 3 show the hole drilling tools 5 and 19 in a new state. When these hole drilling tools 5 and 19 are used for a long time, the rod-shaped members 5a and 5b of the hole drilling tool 5, and the rod-shaped members 19a and 19b of the hole drilling tool 19 may bend in a direction approaching each other, making it impossible to drill a hole suitable for planting.

[0027] Therefore, the hole drilling tool 25 shown in FIG. 6 is made of stainless steel or the like, and includes a pair of opposing rod-shaped members 25a and 25b. The rod-shaped members 25a and 25b are arranged substantially vertically, and the distance between the two gradually decreases downward, which is the same as that of the hole drilling tools 5 and 19. However, as clearly shown in FIG. 6(d), these rod-shaped members 25a and 25b are not plate-shaped, but the cross-section (the cross-section perpendicular to the longitudinal direction of the rod-shaped members 25a and 25b) is L-shaped, and the two cross-sections are formed to be point-symmetrical to each other in a bottom view. In addition, the rod-shaped members 25a and 25b are fixed to the hexagonal columnar support member 25c via plate-shaped members 25d and 25e by bolts, welding, etc., similar to the hole drilling tools 5 and 19.

[0028] By forming the cross-section of the rod-shaped members 25a and 25b into an L-shape and making the two cross-sections point-symmetrical to each other in a bottom view, even when the hole drilling tool 25 is used for a long time, it is possible to prevent the rod-shaped members 25a and 2 from bending in a direction approaching each other, and at the same time, it does not prevent the soil stirred by the rod-shaped members 25a and 25b from escaping between the rod-shaped members 25a and 25b. Therefore, it is possible to continuously drill holes suitable for planting stably for a long time.

[0029] The illustrated embodiment is merely an example and is not a description intended to limit the technical scope of the present invention.

Explanation of Reference Numerals

[0030] 1 Hole drilling device 2 Main body 3 Traveling wheels 4 Drill 5, 19, 25 Hole drilling tools 6 Upper frame 7 Handle 8. Tension spring (coil spring) 9 Drill fixing member 10. Retaining member 11 Shatter prevention plate 12 Spring retaining member 13 Stopper 14, 16 Links 15, 17, 18 hinges 21 (High planter) outer frame 22 Soil 23 holes

Claims

1. Means of transportation, a plurality of drills that move together with the moving means and are vertically movable; a drilling tool fixed to the lower end of each of the plurality of drills; a handle for lowering the plurality of drills from a predetermined position; a return means for returning the handle from the lowered position to the predetermined position; and a rotating means for rotating each of the plurality of drills.

2. 2. The drilling device according to claim 1, wherein the moving means is a plurality of running wheels.

3. 3. The drilling device according to claim 1, wherein the drilling tool comprises a pair of opposing rod-shaped members, the distance between the rod-shaped members gradually decreasing as the rod-shaped members extend downward.

4. The drilling device according to claim 3, wherein the pair of opposing rod-shaped members of the drilling tool have L-shaped cross sections, and the two cross sections are formed so as to be point-symmetrical with each other when viewed from below.

5. 3. The drilling device according to claim 1, wherein the drilling tools fixed to the lower ends of the plurality of drills are held at the same height, and the plurality of drills are lowered together by the handle.

6. 3. The drilling device according to claim 1, wherein the return means is a coil spring interposed between the handle and a drill fixing member that fixes the plurality of drills, and expands as the handle descends.

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