Drilling equipment

Abstract

To provide a borer that can materialize actual boring intervals along assumed boring intervals and that can facilitate materialization of assumed boring intervals which are obstructed by variation of diameters and various factors.SOLUTION: A borer is equipped with one or more rotors 2, 2 which are towed by a cultivator to perform boring at prescribed intervals. The rotors 2, 2 are provided with: drums 10 which are made circular frames by winding a belt-like plate body; a freely expandable arm part 20 which maintains a wound state of the drums; and projections 30 which bore holes on the surface of the ground by protruding from the arm part 20. The projections 30 are characterized by being fixed on the drums 10 by means of a protruding fixture 33 which is inserted inward from an outer direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a drilling device that is attached to an agricultural work machine such as a cultivator, a molding machine, or a cultivator and that drills holes at predetermined positions, mainly for transplanting. [Background technology]

[0002] Conventionally, there has been a planting hole drilling device having a curved plate-like ring plate, an arm rod, and an arm rod tip portion (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 02-26408 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the above-mentioned drilling device consisting of a wheel plate and an arm with a protruding arm rod tip aims to adjust the drilling position of the arm rod tip to the optimal grafting interval by making the wheel plate variable diameter, but it does not necessarily achieve the optimal grafting interval. In other words, the invention of Patent Document 1 attaches a drilling body to the portion where the tip of the threaded arm rod protrudes from the wheel plate, so the drilling body must correspond to the position of the arm rod. In this case, the drilling interval must be measured based on the extension and contraction of the arm rod, making it difficult to actually achieve the expected drilling interval. Therefore, in practice, it is not possible to achieve the expected drilling interval, and a drilling device that can achieve the expected drilling interval is needed.

[0005] Furthermore, in drilling devices towed by agricultural machinery, the rotating body may not rotate in accordance with the rotation of the rotating shaft, causing slippage and preventing the expected drilling intervals from being achieved, and it has been thought that achieving the expected drilling intervals is difficult due to various other factors.It is also practically difficult to achieve the expected wheel plate state when the arm is extended or retracted, so there has been a demand for a drilling device that can achieve the expected drilling intervals using simpler means.

[0006] In view of the above-mentioned drawbacks, the present invention aims to provide a drilling device that can realize actual drilling intervals that are in line with the expected drilling intervals, and that can easily realize the expected drilling intervals that are hindered by variables such as diameter variations and various other factors. [Means for solving the problem]

[0007] The drilling device according to the present invention is equipped with one or more rotating bodies that are towed by an agricultural machine and drill holes at predetermined intervals, and the rotating body has a drum that is a circular frame formed by winding a strip-shaped plate, an extendable arm that holds the drum in a wound state, and a protrusion that protrudes from the arm and drills holes in the ground surface, and the protrusion outside It is fixed to the drum by a fastener that is inserted inward from the The protrusion has a protrusion mounting hole formed on the tip surface of the protrusion and a drum mounting hole formed in the drum, and the protrusion fixing device is inserted through the protrusion mounting hole and fixed in a state where it is inserted through the drum mounting hole. It is characterized by the following.

[0009] In addition, it is preferable that the rotating body has an arm portion having a bearing at a central position and an arm portion extending radially from the bearing to maintain the wound state of the drum, and a rotating shaft inserted into the bearing, and that the bearing and the rotating shaft have a square cross section.

[0010] Furthermore, the rotating shaft inserted into the rotating body is attached to a sliding arm via a bearing so as to be freely rotatable, and the sliding arm is attached to the agricultural implement so as to be freely slidable up and down along the guide groove of the mounting body, and it is preferable that the sliding arm has a notch portion along the outer edge of the bearing. [Effects of the Invention]

[0011] Claim1 According to the invention described in the above, it is possible to provide a drilling device that can realize actual drilling intervals according to the expected intervals, and can easily change the diameter and realize an appropriate hole pitch. By rotating the rotor to drill holes using the protrusions, and by attaching the protrusions directly to the drum from the outside, it is possible to attach the protrusions at any position, and it is also possible to avoid placing the protrusions at the position of the arms of the arm part, or to attach the protrusions at a position different from the arms, thereby realizing drilling according to the expected intervals.

[0012] Claim 2 According to the invention described in the publication, in conventional round shaft drilling devices, the drum would slip relative to the rotation of the round shaft, making it impossible to drill holes at accurate intervals. By making the bearing section and rotating shaft square or rectangular, drum slippage is eliminated, enabling more accurate drilling. Furthermore, the square bearing section allows the arms to be positioned accurately every 90 degrees, and by shifting the positions of the protrusions of multiple rotating bodies every 90 degrees, it is easy to drill holes in a staggered pattern on adjacent ground. Furthermore, by making the bearing section and rotating shaft square or rectangular, the position of the rotating shaft can be easily fixed, making it easy to align the arms of each rotating body.

[0013] Also, claims 3 According to the invention described in (1), it is easy to attach the drilling device to the mounting body via a bearing. Conventionally, drilling devices with multiple rotors threaded onto a rotary shaft required the rotary shaft to be temporarily fixed to the agricultural implement (for example, by fastening only one of two fixing members), before threading the rotors onto the rotary shaft and then installing the rotary shaft on the agricultural implement, making it difficult to align the arm. The cutout portion described in this claim allows the drilling device to be attached to the agricultural implement simply by threading the rotor onto the rotary shaft and then dropping it into the cutout. This is highly effective, as agricultural workers who actually use the drilling device often do not have a dedicated work space, allowing for simple installation and alignment. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is an overall perspective view showing an example of an embodiment of a drilling device of the present invention; [Figure 2] FIG. 2 is an exploded perspective view of the rotating body shown in FIG. [Figure 3] 2 is a partially exploded perspective view showing a state in which the rotating body of FIG. 1 is attached to a frame. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0015] (Embodiment) An example of a ridge forming device according to an embodiment of the present invention will be described with reference to the drawings. In this embodiment, the axial direction of the drilling device 1 in Fig. 3 is defined as the left-right direction, and the direction from the axial center of the rotating body 2 (the position of the bearing portion 21) toward the drum 10 is defined as the outward direction, and the opposite direction is defined as the inward direction.

[0016] As shown in FIG. 1, the drilling device 1 of this embodiment has a tiller connection portion 51 for connecting to a tiller (not shown), and is attached to an attachment frame 52 with its longitudinal direction extending left to right at the rear of the tiller. When connected to the frame 52, the tiller pulls the device, causing the rotors 2, 2 to rotate and drill holes using the protrusions 30, 30. While the present embodiment shown in FIG. 1 shows four rotors 2, 2, the number of rotors may be one, three, or another number. The attachment frame 52 is an elongated, rectangular cylindrical rod attached to the tiller, and is used to mount attachments such as training wheels.

[0017] We will now explain the drilling device 1. The drilling device 1 is made up of a drum 10, which is a cylindrical circular frame, a plurality of rotating bodies 2, 2, each of which is made up of a protrusion 30 arranged on the outer circumferential surface of the drum 10 and an arm portion 20 that maintains the wound state of the drum 10, and a left-right rotating shaft 40 that supports these plurality of rotating bodies 2, 2 so that they can rotate freely.

[0018] The drum 10 will now be described. As shown in FIG. 2, the drum 10 is formed by wrapping a stainless steel plate (drum plate) around a circular frame, or cylindrical shape, to enable rotation in the circumferential direction. The drum 10 is fixed in its wrapped state by the tip of an arm portion 20 (described below). The drum 10 has multiple drum mounting holes 11, 11 of different shapes formed in the center of its width. In its wrapped state, the drum 10 is fixed by threading arm fixing devices (screws) or protrusion fixing devices (screws) for the protrusions 30 through the drum mounting holes 11, 11 into the tip of the arm portion 20. In this embodiment, two protrusions 30 are arranged to form the rotating body 2, but the number of protrusions 30 may be one, three, or four. The drum mounting holes 11, 11 arranged on the drum 10 are holes of different lengths formed at appropriate positions in the center of the drum plate in the width direction. The drum mounting hole, which serves as the starting point for determining the wrapping state of the drum plate, is preferably the small circular first drum mounting hole 11a.

[0019] Next, we will explain the arm portion 20. The arm portion 20 consists of a central bearing portion 21 and arm portions 22, 22 extending radially outward from the bearing portion 21. The arm portions 22, 22 consist of a first arm portion 22a on the bearing portion 21 side (inner side) and a second arm portion 22b on the drum side (outer side).

[0020] The bearing portion 21 of this embodiment is a cylindrical body with an opening in the left-right direction (the direction of the rotation axis), and is rectangular or square when viewed from the left-right direction, most preferably a square shape. The rectangular shape of the bearing portion 21 is preferably the same as the cross-sectional shape of the rotation axis 40 described below. The bearing portion 21 has a longitudinal direction in the left-right direction, and four arms 22 are arranged at the back side at the top of the figure so as to extend perpendicularly from each of the four sides of the rectangle, and shaft fixing devices 23, 23 are arranged at the front side at the top of the figure to fix the rotation axis in an inserted state.

[0021] The square or rectangular bearing portion 21 allows the drum 10 to rotate through a rotating shaft with the same rectangular cross section. Conventional drilling devices for round shafts exist, rotating the drum 10 in response to the rotation of the round shaft. However, with a round shaft, the drum 10 would slip relative to the rotation of the round shaft, making it difficult to drill holes at accurate hole spacing. By using a square shaft as the rotating shaft 40 and a square bearing portion 21, drum slippage can be eliminated, enabling more accurate hole spacing. Furthermore, the square bearing portion 21 allows the arms 22 to be positioned accurately every 90 degrees. When multiple rotating bodies 2, 2 are arranged, the protrusions 30, 30 (described below) can be offset every 90 degrees to drill holes in adjacent ridges in a staggered pattern. Furthermore, when multiple rotating bodies 2 are used, it becomes easier to align the arms of each rotating body 2.

[0022] The arm 22 in this embodiment is composed of a first arm 22a on the bearing 21 side and a second arm 22b on the drum 10 side. The first arm 22a and the second arm 22b each have a longitudinal length that is three-quarters or more of the distance from the base end position (the outer peripheral side surface of each of the four sides) of the bearing 21 to the drum. The diameter of the cylindrical second arm 22b is larger than that of the cylindrical first arm 22a, and the tip side of the first arm 22a can be stored inside the cylinder of the second arm 22b.

[0023] By changing the storage state of the first arm portion 22a and the second arm portion 22b, it is possible to change the diameter of the drum 10. That is, fasteners 24, 24 are arranged on the base end side (inner side) of the second arm portion 22b, and the first arm portion 22a can be inserted into the second arm portion 22b and fastened to fix it in place. This allows the longitudinal length of the arm portion 22 to be adjusted.

[0024] The tips 25, 25 of the second arm 22b are open and come into contact with the inner surface of the drum 10. To secure the second arm 22b to the drum 10, arm fixing devices 26, 26 are inserted from the outside of the drum 10, passed through the drum fixing holes 11, 11 of the drum 10, and inserted into the tips 25 of the second arm 22b. In this case, the tips 25 become the fixing devices. The arm fixing devices 26, 26 can be fixed in their inserted state by preferably screwing them in. When using arm fixing devices, the drum 10 is secured to the arm 22 without the protrusions 30, 30. The outward protrusion height of the arm fixing devices 26, 26 using screws is 10 mm or less, and therefore, even if the rotating body 2 is rotated, holes suitable for agricultural work will not be drilled.

[0025] The protrusion 30 will now be described. The protrusion 30 is a chimney-shaped cylindrical member consisting of a base that protrudes outward and a wide tip that rises from the base. It protrudes approximately 30 mm or more from the outer surface of the drum 10, and can drill a hole of approximately 30 mm or more by rotating the drum. The protrusion 30 has a protrusion mounting hole 32 that penetrates the interior of the protrusion 30, formed at the center of the tip surface 31 that faces the protrusion direction, on the outer surface of the tip. The protrusion 30 is provided at an appropriate position on the drum 10, and a protrusion fastener 33 is inserted and fixed from the protrusion mounting hole 32 on the top surface through the drum mounting hole 11 of the drum 10.

[0026] In Figure 2, the upper and lower protrusions 30, 30 use screws as protrusion fixing devices 33, 33. The protrusion fixing device is firmly fixed by screwing it into the tip 25 of the second arm portion 22b of the arm portion 20 as the fixing device. On the other hand, although not shown, if the protrusion 30 is to be fixed in a position different from the position of the arm portion 22, it is possible to position the protrusion 30 in a position different from the position of the arm portion 22 by placing a nut as the fixing device inside the drum 10 and screwing the protrusion fixing device into it, making it possible to provide the protrusion in any position and achieve the expected hole spacing.

[0027] A manner in which a drilling device 1 having a plurality of rotors 2 mounted on a rotary shaft 40 is attached to a frame 52 will be described with reference to FIG. 3. To rotate the rotary shaft 40 having a square (rectangular) cross section, the rotary shaft 40 is inserted into a bearing unit 41 having a bearing 41a, which rotatably supports the rotary shaft 40, mounted on a plate-shaped connecting plate 41b. In a side view, the bearing 41a is disposed so as to surround the periphery of the rotary shaft 40 and is attached to a connecting plate 41b having an even larger connecting surface than the periphery of the bearing 41a. When the bearing unit 41, which allows the rotary shaft 40 to rotate, is fixed to the tip of the sliding arm 42 by screws, the connecting plate 41b and the sliding arm 42 are fixed by screws. However, a notch 42a is formed at the tip of the sliding arm 42 along the outer edge of the bearing 41a without interfering with the rotation of the rotary shaft 40, and has a notch edge cut from top to bottom. It is slidably fixed at a fixing position 53a on the frame side of an attachment body 53 provided on a frame 52. By having such a cutout portion 42a, the user can easily attach it to the frame 52 by simply fastening it with screws.

[0028] In the past, agricultural machinery required a temporary fixation state in which only one of the two fixing members of the rotating shaft was attached, and then the rotating body was inserted and the other fixing member was fixed. By forming a notch 42a along the outer edge of the bearing 41a, the drilling device 1 can be completed by first inserting the rotating body 2 into the rotating shaft 40, and then the rotating body can be fixed into the notch 42a from above, which is highly convenient, especially for agricultural workers who do not have a work space. Furthermore, the rectangular bearing 21 and rotating shaft 40 align the longitudinal direction of the arm 22, eliminating the need for adjustment and providing extremely high convenience.

[0029] As shown in FIG. 1, the mounting body 53 provided on the frame 52 has a shape that spreads radially from the frame 52 side toward the rotating body 2 side, and an arc-shaped guide groove 53b is formed on the rotating body side. An engagement portion (not shown) that engages with this guide groove 53b is formed on the sliding arm 42, and the sliding arm 42 slides in an arc along the arc-shaped guide groove 53b. With this shape, when the drilling device 1 is provided on the frame 52, it slides downward along the guide groove 53b due to its own weight, and slides along the guide groove 53b according to the shape of the ground on which it is installed. As a result, when the drilling device 1 is towed by a cultivator, it slides according to the height of the ground on which it touches down, allowing for smooth drilling of the ground. [Explanation of symbols]

[0030] 1...Drilling device, 2...Rotating body, 10...Drum, 11...Drum mounting hole, 11a...First drum mounting hole, 20...Arm portion, 21...Bearing portion, 22...Arm portion, 22a...First arm portion, 22b...Second arm portion, 23...Shaft fixing device, 24...Fastening device, 25...Tip (fixed device), 26...Arm fixing device, 30...Protrusion, 31...Tip surface, 32...Protruding mounting hole, 33...Protruding fixing device, 40...Rotating shaft, 41...Bearing portion, 41a...Bearing, 41b...Connecting plate, 42...Sliding arm, 42a...Cutout portion, 51...Tiller connection portion, 52...Frame, 53...Mounting body, 53a...Fixing position, 53b...Guide groove.

Claims

1. It is equipped with one or more rotating bodies that are towed by an agricultural machine and drill holes at predetermined intervals, The rotating body has a drum formed by winding a strip-shaped plate into a circular frame, an extendable arm portion that holds the drum in a wound state, and a protrusion that protrudes from the arm portion and drills holes in the ground surface, The protrusion is fixed to the drum by a fixing device that is inserted from the outside to the inside, and the punching device has a protrusion mounting hole formed on the tip surface of the protrusion and a drum mounting hole formed in the drum, and a fixing device that inserts the protrusion fixing device through the protrusion mounting hole to fix the protrusion fixing device in the inserted state through the drum mounting hole.

2. the rotating body has an arm portion having a bearing at a central position and an arm portion extending radially from the bearing to maintain the wound state of the drum, and a rotating shaft inserted into the bearing, 2. The drilling device according to claim 1, wherein the bearing and the rotary shaft have a square cross section.

3. The rotating shaft inserted into the rotating body is rotatably attached to the sliding arm via a bearing, and the sliding arm is attached to the agricultural work machine so as to be vertically slidable along the guide groove of the attachment body, 3. The drilling device according to claim 2, wherein said sliding arm has a notch along an outer edge of said bearing.

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