JP6908922B2 - Root vegetable digger - Google Patents

Description

The present invention is an agricultural work machine mounted on a tractor and used, which is attached to a towed machine frame, has a blade portion whose rear portion is inclined upward at the front end portion, and is driven by the rear portion of the blade portion. The present invention relates to an improvement of a root vegetable digging machine for long thighs, etc., in which a digging body provided with an endless conveyor belt is passed through a lower portion of a planted long thigh, etc., and root vegetables such as long thighs are raised and dug out.

Root vegetable digging machines such as long thighs are required to dig root vegetables efficiently and smoothly without damaging them. Conventionally, as such a digging machine, "Digging machine for root vegetables and the like" in JP-A-2000-139151 (Patent Document 1) and "Long-spot digging device" in JP-A-2008-29230 (Patent Document 2). Is disclosed.

In the "root vegetable digging machine" disclosed in Patent Document 1, "a base frame attached to a tractor and a front portion of the base frame via a support bar so that the front portion is located below the rear portion. The drive pulley is composed of a digging body that has a blade at the tip, is provided with a conveyor belt that is hung over the front and rear, and is provided with a drive pulley that can drive the conveyor belt. It is a digging machine for root vegetables, etc., which is characterized in that it can idle only in the direction in which the upper surface of the conveyor belt rotates backward. Further, the "long thigh digging device" disclosed in Patent Document 2 is "attached to the lower part of the base frame which is connected to the rear part of the tractor and is towed, the front part forms a blade part, and the rear part is inclined upward. In a long dioscorea opposita digging device having a digging blade made of an endless power belt conveyor, a digging mechanism is continuously provided at the rear of the endless power belt conveyor to oscillate a vibrating plate up and down. It is a long thigh digging device characterized in that the cultivated soil adhering to the long thigh dug up by the blade is shaken off. "

Japanese Unexamined Patent Publication No. 2000-139151 Japanese Unexamined Patent Publication No. 2008-29230

A digger with an inclined endless belt conveyor driven at the rear of the blade is passed through the lower part of the planted root vegetables such as long thighs, and the root vegetables such as long thighs are raised and dug out. The digger is required to dig smoothly without damaging the root vegetables. In addition, work efficiency is improved by allowing the auxiliary worker to smoothly pull out the root vegetables raised by the digging body.

Therefore, the digging machine for root vegetables and the like of Patent Document 1 is provided with an endless belt conveyor driven to the rear side in the traveling direction. Further, the long thigh digging device of Patent Document 2 is configured to provide a vibrating plate swing mechanism that swings the vibrating plate up and down at the rear of the endless belt conveyor so as to shake off the soil mass adhering to the long thigh. Depending on the soil conditions, the soil around the root vegetables such as long thighs does not collapse and the root vegetables cannot be pulled out, or the root vegetables suddenly fall with the soil from the rear end of the vibrating plate swing mechanism and damage the root vegetables. There was a problem that efficient work could not be performed by giving.

From this, it is an object of the present invention to efficiently break down the soil adhering to the surroundings of the root vegetables raised by the belt conveyor, and to greatly reduce the labor of the auxiliary worker to pull out the root vegetables without damaging the root vegetables. The purpose is to provide a root vegetable digging machine for long thighs.

In order to solve the above problem, the invention according to claim 1 is a root vegetable digging machine for long thighs, etc., in which a digging body is passed under the root vegetables such as long thighs to raise and dig up the root vegetables such as long thighs. The digging body is a belt conveyor having a blade portion that is provided in the front portion and is inclined backward, and an inclined surface that extends from the rear end portion of the blade portion to the rear side and the upper surface is raised from the front to the rear. comprising a, in the belt conveyor rear end, is extended rearward so as to extend the inclined surface of the belt conveyor, and the extension plate having a belt conveyor and substantially the same width provided, said extension plate Is adjacent to the extension plate drive hydraulic motor that drives the extension plate, the first eccentric portion connected to the extension plate drive hydraulic motor, and the first eccentric portion, and has a rotational phase with respect to the first eccentric portion. The extension plate includes an eccentric shaft having a second eccentric portion shifted, a shaft for rotating the extension plate, and a rail for reciprocating the shaft, and the extension plate has at least one connecting arm with the eccentric shaft. The first eccentric portion rotates the left and right ends in the direction orthogonal to the traveling direction up and down with the shaft as the axis, and the second eccentric portion causes the shaft to travel along the rail. It is a root vegetable digging machine for long thighs, etc., characterized in that the extension plate itself reciprocates left and right with respect to the traveling direction by reciprocating left and right.

According to the present invention, a large amount of soil adhering to the root vegetables raised by the belt conveyor is gradually dropped by the vertical vibration of the left and right ends of the extension plate provided at the rear end of the belt conveyor. Prevents the root vegetables from dropping suddenly from the rear end of the extension plate and damaging the root vegetables, exposing the root vegetables from the soil. Furthermore, the root vegetables are exposed from the soil by gradually shaking off the soil adhering to the surroundings of the root vegetables, which cannot be completely removed by the vertical vibration of the conventional extension plate, by the reciprocating movement of the extension plate to the left and right. The area is greatly increased, the field worker can easily grasp the root vegetables, and the labor for pulling out the root vegetables is greatly reduced. In addition, by adding vertical vibration and reciprocating movement to the left and right, the soil can be reliably collapsed from the surroundings of the root vegetables, so it is possible to perform digging work regardless of the soil quality and field conditions. Can be provided.

It is a side view on the left side in the traveling direction of the working state of the root vegetable digging machine of the embodiment of the present invention. It is a top view of the working state of the root vegetable digger of the Example of this invention. It is a rear view of the working state of the root vegetable digger of the Example of this invention. It is a top view of the main part which cross-sectioned the drive part of the belt conveyor part and the extension plate part of this invention. FIG. 4 is a cross-sectional view taken along the line BB in FIG. FIG. 5 is a cross-sectional view taken along the line CC in FIG. FIG. 5 is a cross-sectional view taken along the line DD in FIG. FIG. 5 is a cross-sectional view taken along the line BB in FIG. 4 of the second embodiment. FIG. 8 is a cross-sectional view taken along the line CC in FIG. FIG. 8 is a cross-sectional view taken along the line DD in FIG. FIG. 5 is a cross-sectional view taken along the line BB in FIG. 4 of the third embodiment. FIG. 11 is a cross-sectional view taken along the line CC in FIG. FIG. 11 is a cross-sectional view taken along the line DD in FIG.

An embodiment will be described with reference to FIGS. 1 to 13. A three-point link mechanism, which is an elevating link, is provided at the rear of the tractor (not shown), which is a traveling work vehicle, and is connected to the mounting portion of the front portion of the root vegetable digging machine of the present invention so as to be elevated. It is driven by the power output from the tractor side. In the description of this example, the left side shown in FIG. 1 will be described as the front side in the traveling direction.

The machine frame 1 for holding the machine shown in FIGS. 1 to 3 is formed so that the plate-shaped bodies are opposed to each other on the left and right sides. Then, a round bar-shaped frame fixed between the plate-shaped bodies at the front tip of the machine frame 1 and provided with lower link pins 1f at the left and right tip portions connects and fixes the plate-shaped bodies, and further, at the rear end of the machine frame 1. The bracket 1b is projected upward.

A mast frame 1a is provided at the front portion of the machine frame 1. The mast frame 1a is made of a plate-like body, and is connected to the machine frame 1 so as to face each other on the left and right sides. The base portion, which is the lower end of the mast frame 1a, is held by a rotating shaft 1c so as to be rotatable back and forth in the vicinity of the round bar-shaped frame provided with the lower link pin 1f of the machine frame 1, and is held in front of the upper tip of the mast frame 1a. Is provided with a top link pin 1e horizontally in the left-right direction. Further, the rear portion of the mast frame 1a is connected to one end of the hydraulic cylinder 1d, and the other end of the hydraulic cylinder 1d is connected to the bracket 1b provided at the rear portion of the machine frame 1. Then, the top link pin 1e and the lower link pin 1f provided on the machine frame 1 are attached to the three-point link mechanism which is an elevating link of the tractor. Therefore, by expanding and contracting the hydraulic cylinder 1d, it is possible to rotate the rear side of the machine frame 1 up and down around the rotation shaft 1c. When the hydraulic cylinder 1d is contracted, the excavation portion 2 and the excavation body 3, which will be described later, rotate rearward and rise to move.

In the machine frame 1, an excavation part 2 and a beam 1g are extended downward and are provided in pairs on the left and right. The excavation section 2 is located on the front side of the beam 1g, and excavates the soil on the left and right sides of the root vegetable A such as the long thigh to be excavated. A digging body 3, which will be described later, is provided at the lower end of the beam 1g.

The excavation section 2 is provided on the machine frame 1 so as to face downward. The excavation part 2 is located in the soil when the root vegetable digging machine is put into the digging work state, excavates the soil on the left and right sides of the root vegetable A such as the long thigh to be dug up, and lifts the root vegetable A and the surrounding soil. Make it easier. The excavation portion 2 includes a boom 2a and an excavation chain 20 wound around the boom 2a. The excavation chain 20 is composed of a roller chain 2e and a plurality of excavation blades 2f attached to the outer periphery thereof. The idler sprocket 2d, which is provided so as to project in front of the intermediate portion between the tension sprocket 2c and the boom 2a, is wound in a triangular shape when viewed from the side. The upper ends of the booms 2a are fixed to the rear side of the machine frame 1 so as to face each other on the left and right in the traveling direction. Therefore, the excavation chain 20 is provided on each of the opposing booms 2a, and at the time of digging work, the root vegetables A such as long thighs to be dug are positioned between the opposing booms 2a, and the hung excavation chain 20 is moved up and down. By driving to, the soil on the left and right sides of the root vegetable A to be excavated can be squeezed up and down to soften it. The tip side of the boom 2a can be expanded and contracted in the length direction, and the tension of the excavation chain 20 can be adjusted. Further, the upper portion of the excavation portion 2 exposed from the soil during the excavation work is covered with the excavation portion cover 7. Further, side guards 7a and rear guards 7b formed of round pipes are provided on the left and right sides and the rear side to prevent accidents due to operator contact or involvement in the movable part of the excavation part 2. ing.

Behind the excavation chain 20 of the excavation section 2, a beam 1g is extended downward from the rear side of the machine frame 1 and is provided facing the left and right in the vicinity of the excavation chain 20, and is polymerized behind the excavation chain 20 in front view. It is provided at the position. The lower end of the beam 1g extends to the vicinity of the lower end of the excavation chain 20. The upper portion of the beam 1g is fixed to the machine frame 1 in a vertically long strip-like shape with the thick end edges facing the traveling direction. That is, the positional relationship between the boom 2a and the beam 1g is fixed.

A digging body 3 is attached to the lower end of the beam 1g. The belt conveyor 3a, which is a digging body main body having an inclined surface that rises from the front to the rear, and the belt provided at the rear end of the belt conveyor 3a and having a flat surface portion approximately equal to the width of the belt conveyor 3a. An extension plate 4 that acts to extend the inclined surface of the conveyor 3a is provided.

The digging body 3 is provided between the beams 1g located on the left and right sides, and is attached to the beam 1g by fixing the vicinity of the blade portion 3d. The digging body 3 at the time of digging work passes through the lower part of the root vegetable A such as a long thigh to be dug, and is excavated by the excavation part 2 to soften the soil on the left and right sides. The surrounding soil and the root vegetable A are placed on the inclined surface of the belt conveyor 3a and moved to raise the root vegetable A upward.

The blade portion 3d is made of a steel plate and is provided substantially the same as the width of the belt conveyor 3a, and the soil below the root vegetable A is cut by the progress of the tractor.

In the belt conveyor 3a, a drive roller 3b having a large side view diameter is positioned on the rear end side, and a plurality of support rollers having a diameter smaller than that of the drive roller 3b are arranged from the front end on the blade 3d side to the rear side to place a belt. The upper surface of the winding bell conveyor 3a is configured to have an upward slope. The belt conveyor 3a is rotationally driven via the roller drive gear case 3c by a conveyor drive hydraulic motor 3e provided in the excavation body 3 for driving rollers 3b, and the inclined surface on the upper surface of the belt conveyor 3a moves from the front side to the rear side. Driven to. The drive rollers 3b of the belt conveyor 3a and the support rollers that support the belt conveyor 3a are rotatably held by the conveyor side plates 3f standing on the left and right sides of the belt conveyor 3a.

A driving unit of the belt conveyor 3a of the excavator 3 will be described with reference to FIG. A conveyor drive hydraulic motor 3e is provided at the center of the left and right conveyor side plates 3f of the excavator body 3 to drive the belt conveyor 3a. Two drive rollers 3b located at the rear end of the belt conveyor 3a are provided on the left and right, and a roller drive gear case 3c is provided in the middle of the drive rollers 3b with the conveyor drive hydraulic motor 3e attached. When driven, the belt conveyor 3a is driven.

An extension plate 4 is provided behind the drive roller 3b at the rear end of the belt conveyor 3a, and the extension plate 4 rotates around the extension plate holding bracket 5 which is bridged to the left and right of the rear portion of the conveyor side plate 3f. It is held so that it can reciprocate in the left-right direction.

An extension plate of an example of the present invention will be described with reference to FIGS. 4 to 7.
The extension plate 4 has a flat surface portion 4a that is substantially the same as the width of the belt conveyor 3a and is provided so as to extend the inclined surface of the belt conveyor 3a, and is perpendicular to the flat surface portion 4a at a substantially central portion of the flat surface portion 4a. As described above, the extension plate support member 4b is fixed, and the flat surface portion of the extension plate support member 4b is oriented parallel to the traveling direction. Further, a boss 4c into which the bearing 4d is inserted is fixed to a lower portion near the substantially center of the width of the extension plate support member 4b, and a shaft 41 is inserted into the bearing 4d.
Bearings 42 are inserted at both ends of the shaft 41, and nuts are used to prevent the bearings 42 from falling off at the end faces of the shaft 41.

The bearings 42 provided at both ends of the shaft 41 are rotatably fitted in the grooves of the rail 5d fixed to the extension plate holding bracket 5 described later, so that the extension plate 4 is fitted along the grooves of the rail 5d. At the same time, it becomes possible to reciprocate horizontally to the left and right in the traveling direction, and at the same time, it becomes possible to rotate around the shaft 41 supported by the bearing 42.

The extension plate holding bracket 5 is attached so as to be bridged to the left and right of the conveyor side plate 3f, and the extension plate holding bracket 5 is composed of two front support plates 5b and a rear support plate 5c provided in parallel in the front-rear direction. NS. Rails 5d having concave grooves formed in the left-right direction with respect to the traveling direction are fixed to the inner surfaces of the front support plate 5b and the rear support plate 5c so that the groove-forming surfaces face each other in parallel. ..

An extension plate drive hydraulic motor 43 for driving the extension plate 4 is fixedly provided on the right side of the rear surface of the rear support plate 5c of the extension plate holding bracket 5, and the extension plate drive hydraulic motor 43 is provided in the traveling direction. The output shaft 43a of the extension plate drive hydraulic motor 43 is directed forward. An eccentric shaft 44 provided with two eccentric portions is fixed to the output shaft 43a of the extension plate drive hydraulic motor 43.

The eccentric shaft 44 has a first eccentric portion 44a on the extension plate drive hydraulic motor 43 side and a second eccentric portion 44b adjacent to the first eccentric portion 44a and provided at a position where the rotation phase angle is deviated. A pin member is fixed to the eccentric portion of the extension plate drive hydraulic motor 43 at a position displaced in the radial direction from the rotation center of the output shaft 43a.
The rotation of the eccentric shaft 44 fixed to the output shaft 43a of the extension plate drive hydraulic motor 43 causes the first eccentric portion 44a and the second eccentric portion 44b to rotate eccentrically. The shaft end of the eccentric shaft 44 opposite to the extension plate drive hydraulic motor 43 is inserted and supported in the eccentric shaft support bearing 5e provided on the front support plate 5b of the extension plate holding bracket 5.

The extension plate 4 is reciprocated to the left and right in the direction orthogonal to the traveling direction to the first eccentric portion 44a on the extension plate drive hydraulic motor 43 side of the eccentric shaft 44 fixed to the output shaft 43a of the extension plate drive hydraulic motor 43. One end of the reciprocating connecting arm 45 for the purpose is inserted so as to be rotatable. On the other hand, a tubular member is fixed to the other end of the reciprocating connecting arm 45, and a shaft 41 provided on the bearing 4d in the boss 4c of the extension plate support member 4b of the extension plate 4 is attached to the inner diameter of the tubular member. By inserting the extension plate 4, the extension plate 4 is connected to the first eccentric portion 44a of the eccentric shaft 44, and can reciprocate in the left-right horizontal direction in the traveling direction.

Further, the tubular spacer 46 for restricting movement in the axial direction is sandwiched between the tubular member fixed to the reciprocating connecting arm 45 and the bearing 4d inserted in the boss 4c of the extension plate support member 4b of the extension plate 4. By inserting the extension plate 4 into the shaft 41, the extension plate 4 does not move in the axial direction, and the positional relationship between the eccentric shaft 44 and the extension plate 4 in the front-rear direction can be kept constant.

One end of a rotating connecting arm 47 for rotating the extension plate 4 up and down rotates at the second eccentric portion 44b adjacent to the first eccentric portion 44a of the eccentric shaft 44 connected to the extension plate drive hydraulic motor 43. It is inserted so that it can move. On the other hand, the other end of the rotating connecting arm 47 is inserted into the pin 4e fixed to the lower portion on the right side of the extension plate support member 4b of the extension plate 4 in the traveling direction toward the rear, so that the extension plate 4 becomes the first. 2 It is connected to the eccentric portion 44b and can rotate about the shaft 41.

As described above, by using the extension plate drive hydraulic motor 43 as a drive source and passing through the eccentric shaft 44, it is possible to simultaneously execute the reciprocating movement of the extension plate 4 itself in the horizontal horizontal direction and the vertical vibration of the left and right ends of the extension plate 4. It was done.

Due to the vertical vibration of the left and right ends of the extension plate 4, the soil raised together with the root vegetables A by the slope of the belt conveyor 3a is gradually dropped downward to the side of the extension plate, so that the soil reaches the rear end of the extension plate 4. Prevents the soil from collapsing suddenly and exposes the upper part of the root vegetable A.
At the same time, the reciprocating movement of the extension plate 4 in the horizontal direction to the left and right causes the soil adhering to the lower part of the root vegetable A, which could not be completely removed by the vertical vibration of the left and right ends of the extension plate 4, to move to the left and right sides of the extension plate 4. By gradually shaking it off, the exposed area of the root vegetable A increases, and it becomes easier for the auxiliary worker to grasp the root vegetable A.
Due to the vertical vibration and left-right reciprocation of the left and right ends of the extension plate 4, the soil adhering to the root vegetable A is greatly reduced, and the soil adhering to the root vegetable A does not collapse rapidly. It is possible to pull out the root vegetables easily without putting them in, and it prevents the root vegetables A from falling downward together with the soil and damaging the root vegetables A.

In this example, the configuration is as described above, but it may be configured as in the second embodiment shown in FIGS. 8 to 10 and the third embodiment shown in FIGS. 11 to 12. It should be noted that only the differences from the above will be described, and the same reference numerals will be used for the same embodiments as described above, and the description thereof will be omitted.

The second embodiment will be described with reference to FIGS. 8 to 10. An eccentric shaft 44'provided with one eccentric portion 44a'is fixed to the output shaft 43a of the extension plate drive hydraulic motor 43 provided on the right side of the rear surface of the rear support plate 5c of the extension plate holding bracket 5. A pin member is fixed to the eccentric portion at a position shifted in the radial direction from the rotation center of the output shaft 43a of the extension plate drive hydraulic motor 43, and the eccentric shaft is fixed to the output shaft 43a of the extension plate drive hydraulic motor 43. As the 44'rotates, the eccentric portion 44a' rotates eccentrically. The shaft end of the eccentric shaft 44'on the opposite side of the extension plate drive hydraulic motor 43 is inserted and supported in the eccentric shaft support bearing 5e provided on the front support plate 5b of the extension plate holding bracket 5.

One end of the connecting arm 45'is inserted into the eccentric portion 44a' so as to be rotatable. On the other hand, a tubular member is fixed to the other end of the connecting arm 45', and an extension plate support member 4b is further fixed to the tubular member. That is, the extension plate 4 and the connecting arm 45'are integrated and fixed. The shaft 41 is inserted into the inner diameter of the tubular member fixed to the connecting arm 45', bearings 42 are further inserted into both ends of the shaft 41, and nuts are used to prevent the bearing 42 from coming off. It is fitted in a groove formed in the rail 5d fixed to the support plate 5c.

As a result, the rotation of the extension plate drive hydraulic motor 43 enables vertical vibration of the left and right ends of the extension plate 4 and reciprocating movement in the left and right horizontal directions in the traveling direction via the eccentric shaft 44'. The raised soil is broken down by the vertical vibration of the extension plate 4 and the left-right reciprocating movement to expose the root vegetable A, so that the field worker can grab and dig the root vegetable.

A third embodiment will be described with reference to FIGS. 11 to 12. An eccentric shaft 44'provided with one eccentric portion 44a'is fixed to the output shaft 43a of the extension plate drive hydraulic motor 43 provided on the right side of the rear surface of the rear support plate 5c of the extension plate holding bracket 5. The shaft end on the opposite side of the extension plate drive hydraulic motor 43 is inserted and supported by the eccentric shaft support bearing 5e provided on the front support plate 5b of the extension plate holding bracket 5.

One end of the connecting arm 45 ″ is rotatably inserted into the eccentric portion 44a ″, and a pin member is fixed to the other end of the connecting arm 45 ″. There is a rotation fulcrum boss 4g'' vertically fixed to the extension plate support member 4b'' below the extension plate support member 4b'' of the extension plate 4, and the rotation fulcrum boss 4g'' is the front support plate 5b. The shaft 41'' is inserted into the inner diameter of the rotation fulcrum boss 4g'', the hole provided in the front support plate 5b, and the hole provided in the rear support plate 5c. Is fixed by one axis. Further, the swing bearing 48 is inserted into the boss 4f'' fixed above the rotation fulcrum boss 4g'' of the extension plate support member 4b'', and the swing bearing 48 is inserted into the connecting arm 45''. By inserting the pin member at the other end, the eccentric shaft 44'and the extension plate 4 are connected.

As a result, the rotation of the extension plate drive hydraulic motor 43 can rotate the extension plate 4 around the rotation fulcrum shaft 41'' via the eccentric shaft 44', and moves the left and right ends of the extension plate 4 up and down. At the same time, the extension plate 4 reciprocates left and right near the center of the flat surface portion 4a in the left-right direction, and the soil raised by the excavator 3 is reciprocated by the vertical vibration and the left-right reciprocation of the extension plate 4. By breaking it down and exposing the root vegetable A, the field worker can grab and dig the root vegetable.

The extension plate support bracket 5 for holding the extension plate 4 can be attached so as to change the angle of the flat surface portion 4a of the extension plate 4 up and down with respect to the inclined surface of the belt conveyor 3a, and the extension plate support bracket 5 with respect to the conveyor side plate 3f. The bolt mounting hole of the mounting support plate 5a is a long hole and can be fixed by changing the angle.

A landslide means 8 is provided on the rear side of the upper portion of the intermediate position between the left and right beams 1g shown in FIGS. 1 to 3. The soil crushing means 8 is for crushing the soil from the root vegetables A and the soil that have been raised by the digging body 3 to the left and right to expose the upper end portion of the root vegetables A. In the landslide means 8, a plurality of round bar-shaped squeezing rods are arranged in a straight line at intervals in the traveling direction, and the lower portion swings in a direction orthogonal to the traveling direction with the upper portion as the center to remove the soil. Break it down.

An input gear case 6b into which power from the tractor is input is provided at the center of the machine frame 1 shown in FIG. An input shaft 6c is projected forward in front of the input gear case 6b, and the PTO shaft (not shown) of the tractor and the input shaft 6c are connected by a universal joint or the like to input power from the tractor. Output shafts are projected from the input gear case 6b to the left and right in a direction orthogonal to the input shaft 6c, and drive sprockets 2b are fixed to each of the input gear cases 6b. The excavation chain 20 of the excavation section 2 is wound around the drive sprocket 2b, and the excavation chain 20 is driven by the power input to the input shaft 6c. A hydraulic pump 6a is provided above the input gear case 6b, and a roller chain is wound around a sprocket fixed to the input shaft 6c and a sprocket fixed to the input shaft of the hydraulic pump 6a to drive the hydraulic pump 6a. .. The flood pressure generated by the hydraulic pump 6a is sent to the conveyor-driven hydraulic motor 3e and the extension plate-driven hydraulic motor 43 in the excavator 3 shown in FIG. 4 through the pipes, and the respective hydraulic motors are driven. When the conveyor drive hydraulic motor 3e is driven, the drive roller 3b of the belt conveyor 3a of the excavator 3 rotates to operate the belt conveyor 3a. Further, when the extension plate drive hydraulic motor 43 is driven, the extension plate 4 swings. An output unit for driving the landslide means 8 is provided behind the input gear case 6b to drive the landslide means 8. The hydraulic cylinder 1d that rotates the machine frame 1 is provided with a valve on the tractor side and is operated by the oil pressure on the tractor side.

The state shown in FIG. 1 shows the posture of the digging work state, and in the case of this example, the digging body 3 is located at a depth of about 1.2 m underground. When the digger is moved by the tractor, the hydraulic cylinder 1d is contracted so that the rear side of the machine frame 1 rotates counterclockwise from the state shown in FIG. 1 around the rotation shaft 1c. As a result, the lower portion of the excavation portion 2 and the excavation body 3 fixed to the rear side of the machine frame 1 rotate and rise. Further, when the three-point link mechanism, which is an elevating link of the tractor, is raised, the lower portion of the excavation portion 2 and the excavation body 3 can be moved by a tractor or the like mounted above the ground.

A method of digging with a root vegetable digging machine such as a long thigh of the embodiment of the present invention will be described. The lower link pins 1f provided on the front left and right sides of the machine frame 1 are connected to the lower links of the three-point link mechanism of the tractor, and the top link pins 1e located on the front side of the mast frame 1a provided on the front upper part of the machine frame 1 are connected. The digger is attached to the tractor by connecting it to the top link of the three-point link mechanism of the tractor. A power transmission shaft such as a universal joint is connected to the PTO shaft of the tractor and the input shaft 6c of the input gear case 6b so that the power from the tractor can be input.

The ridges on which root vegetables A such as long thighs to be dug are planted are positioned so as to straddle the tractor, that is, the root vegetables A are located at the center of the left and right excavation chains 20 of the excavation part 2. , Drive the belt conveyor 3a of the excavation part 2 and the excavation body 3. Then, when the valve provided on the tractor side is operated to extend the hydraulic cylinder 1d, the machine frame 1 rotates clockwise in the state shown in FIG. 1, and the excavation portion 2 fixed to the machine frame 1 and the excavation portion 2 are dug out. Body 3 goes into the ground. When the blade portion 3d in front of the digging body 3 is positioned below the predetermined digging root vegetable A, the tractor is advanced to start the digging work.

As the tractor advances, the excavation section 2 excavates the left and right sides of the root vegetable A to soften the soil, and the excavation body 3 located behind it excavates the left and right sides of the belt conveyor 3a. The soil located inside the excavation chain 20 of the above is placed and moves backward together with the root vegetable A. By moving, the root vegetables A and the soil are lifted upward along the inclined surface of the belt conveyor 3a. When the floating soil moves to the extension plate 4 attached to the rear end of the excavator 3, the soil raised together with the root vegetables A by the belt conveyor 3a due to the vertical rotation vibration of the left and right ends of the extension plate 4 is lifted. Gradually drop the extension plate 4 from the left and right ends to the bottom of the digging body 3. Further, by reciprocating the extension plate 4 itself in the horizontal direction to the left and right, the soil adhering to the surroundings of the lifted root vegetable A is shaken off to the left and right sides of the extension plate 4, thereby exposing the root vegetable A from the soil and assisting. The worker can dig up the root vegetable A by grasping and pulling it out.

In the case of this example, the excavation portion 2 is provided in front of the excavation body 3, but the present invention can be carried out even if the excavator is not necessarily provided with the excavation portion 2. Further, in the case of this example, although the driven belt conveyor 3a is provided, the present invention can be carried out even if the root vegetable digging machine provided with the driven belt conveyor 3a is not necessarily provided.

The present invention can be applied to a digging machine for digging root vegetables such as long thighs, which is mounted behind a traveling machine such as a tractor.

1 Machine frame 1a Mast frame 1b Bracket 1c Rotating shaft 1d Hydraulic cylinder 1e Top link pin 1f Lower link pin 1g Beam 2 Excavation part 20 Excavation chain 2a Boom 2b Drive sprocket 2c Tension sprocket 2d Idler sprocket 2e Roller chain 2f Excavation blade 3 Handle 3a Belt conveyor 3b Drive roller 3c Roller drive gear case 3d Blade part 3e Hydraulic motor 3f Conveyor side plate 4 Extension plate 4a Flat part 4b Extension plate support member 4c Boss 4d Bearing 4e Pin 4f'' Boss 4g'' Rotating fulcrum boss 41 Shaft 41'' Rotating fulcrum shaft 42 Bearing 43 Extension plate drive hydraulic motor 43a Output shaft 44 Eccentric shaft 44'Eccentric shaft 44a First eccentric part 44a' Eccentric part 44b Second eccentric part 45 Reciprocating connection arm 45'Connecting arm 45'' Connecting arm 46 Spacer 47 Rotating connecting arm 48 Swing bearing 5 Extension plate holding bracket 5a Mounting support plate 5b Front support plate 5c Rear support plate 5d Rail 5e Eccentric shaft support bearing 6a Hydraulic pump 6b Input gear case 6c Input shaft 7 Excavation part cover 7a Side guard 7b Rear guard 8 Landslide means A Root vegetables

Claims (1)

It is a root vegetable digging machine for long thighs, etc., in which the digging body is passed through the lower part of the root vegetables such as long thighs, and the root vegetables such as long thighs are raised and dug up.
The digging body includes a belt conveyor having a blade portion that is provided in the front portion and is inclined backward, and an inclined surface that extends rearward from the rear end portion of the blade portion and the upper surface is inclined from the front to the rear. ,
The The belt conveyor rear end, is extended rearward so as to extend the inclined surface of the belt conveyor, and the extension plate having a belt conveyor and substantially the same width provided,
The extension plate is adjacent to the extension plate drive hydraulic motor that drives the extension plate, the first eccentric portion connected to the extension plate drive hydraulic motor, and the first eccentric portion, and is attached to the first eccentric portion. On the other hand, an eccentric shaft having a second eccentric portion whose rotation phase is shifted, a shaft for rotating the extension plate, and a rail for reciprocating the shaft are provided.
The extension plate is interlocked via at least one connecting arm and the eccentric shaft, with the left and right ends of the first direction perpendicular to the traveling direction by the shaft to the shaft by the eccentric portion rotates vertically, the A root vegetable digging machine for long thighs, etc., characterized in that the extension plate itself reciprocates left and right with respect to the traveling direction by reciprocating the shaft left and right in the traveling direction along the rail by a second eccentric portion.

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